JPWO2019176869A1 - Manufacturing method of light source unit and mounting member used for it - Google Patents

Abstract

The light source unit (LU) has a first substrate (50) and a second substrate (60) on which light emitting elements (55, 63) are mounted, respectively, and a first substrate (50) on which at least a part of the first substrate (50) is mounted. A heat sink (80) having a second mounting surface (91) on which at least a part of the first mounting surface (86) and the second substrate (60) is mounted, and the first substrate (50) and the first mounting. It is provided with a grease (24) interposed between the surface (86) and between the second substrate (60) and the second mounting surface (91). The first substrate (50) and the second substrate (60) are placed on the heat sink (80) at a predetermined interval. The heat sink (80) has an edge on the second substrate (60) side of a region overlapping the first substrate (50) on the first mounting surface (86) and a second substrate (60) on the second mounting surface (91). It has a recess (96) for a flow member capable of accommodating a part of grease (24) between the edge of the region overlapping with the first substrate (50) side.

Description

The present invention relates to a light source unit and a method for manufacturing a mounting member used therein.

As a light source unit used in a device for irradiating light such as a lamp, a light source unit such as a light emitting diode (LED) is known as a light source. For example, Patent Document 1 below describes a light source unit including a plurality of substrates on which such light emitting elements are mounted.

The light source unit of Patent Document 1 below includes three substrates on which light emitting elements are mounted, and a heat sink on which these three substrates are mounted. In this light source unit, three substrates are mounted in parallel on one heat sink.

Further, Patent Document 2 below describes a light source unit including a plurality of substrates on which light emitting elements are mounted. The light source unit of Patent Document 2 below includes three substrates on which light emitting elements are mounted, and a mounting member on which these three substrates are mounted. In this light source unit, three substrates are mounted in parallel on a mounting member, the angle formed by the two adjacent substrates is smaller than 180 degrees, and the two adjacent substrates are connected by lead wires.

Further, for example, a light source unit in a vehicle headlight represented by an automobile headlight is configured to include a reflector or the like that reflects light emitted from a light emitting element in order to obtain a desired light distribution. For example, Patent Document 3 below discloses a light source unit including a substrate on which a light emitting element is mounted, a reflector that reflects light emitted from the light emitting element, and a mounting member on which the substrate and the reflector are mounted. In this light source unit, the substrate is formed with through holes penetrating in the plate thickness direction of the substrate, and the mounting member has ribs substantially parallel to the normal of the mounting surface on which the substrate is mounted. By inserting the ribs in the mounting member into the through holes of the substrate, the position of the substrate with respect to the mounting member is restricted within a predetermined range, and the position of the light emitting element with respect to the reflector attached to the mounting member is restricted within a predetermined range. Has been done.

Further, for example, Patent Document 4 below discloses a light source unit including a substrate on which a light emitting element is mounted, a reflector that reflects light emitted from the light emitting element, and a mounting member on which the substrate and the reflector are mounted. ing. In this light source unit, the substrate is mounted on the mounting surface of the mounting member and is pressed against the mounting surface from the side opposite to the mounting surface side by the reflector to be fixed to the mounting member. This reflector presses the substrate against the mounting surface by a force substantially perpendicular to the mounting surface.

Further, since the light emitting element tends to have a decrease in luminous efficiency and life due to heat generation during light emission and a change in the wavelength of light emitted from the light emitting element, the light emitting element is cooled by using a heat radiating member such as a heat sink. May be done. For example, in Patent Document 5, a heat sink having a base plate and a plurality of heat radiation fins formed on one surface of the base plate and a light emitting element are mounted and mounted on the other surface of the base plate in the heat sink. A light source unit including a substrate is disclosed.

Japanese Unexamined Patent Publication No. 2013-254603 JP-A-2015-207367 Japanese Unexamined Patent Publication No. 2016-149373 Japanese Unexamined Patent Publication No. 2011-119094 Japanese Unexamined Patent Publication No. 2013-110068

The light source unit according to the first aspect of the present invention includes a first substrate and a second substrate on which a light emitting element is mounted, a first mounting surface on which at least a part of the first substrate is mounted, and the second substrate. Between the heat sink having the second mounting surface on which at least a part of the substrate is mounted, the first substrate and the first mounting surface, and between the second substrate and the second mounting surface. A flow member having an intervening fluidity is provided, and the first substrate and the second substrate are placed on the heat sink at a predetermined interval, and the heat sink is mounted on the first mounting surface. A part of the flow member can be accommodated between the edge of the region overlapping the one substrate on the second substrate side and the edge of the region overlapping the second substrate on the second mounting surface on the first substrate side. It is characterized by having a recess.

In this light source unit, as described above, the heat sink has an edge on the second substrate side of the region overlapping the first substrate on the first mounting surface and the first substrate side of the region overlapping the second substrate on the second mounting surface. It has a recess that can accommodate a part of the flow member with the edge of the. Therefore, a part of the surplus flow member extruded from between the first substrate and the first mounting surface toward the second substrate side can be accommodated in the recess. Further, a part of the surplus flow member extruded from between the second substrate and the second mounting surface toward the first substrate side can be accommodated in the recess. Therefore, a part of the surplus flow member accumulated between the first substrate and the second substrate is on the surface opposite to the first mounting surface side of the first substrate or on the second mounting surface side of the second substrate. It is possible to suppress the adhesion on the surface opposite to the above. Therefore, it is possible to prevent the surplus flow member from adhering to the light emitting element mounted on the first substrate or the light emitting element mounted on the second substrate. Therefore, it is possible to provide a light source unit capable of suppressing defects. The above-mentioned flow member is not limited to a member having constant fluidity, and at least when the first substrate is mounted on the first mounting surface and the second substrate is mounted on the second mounting surface. Members that have fluidity when placed are also included. Therefore, the flow member is formed of an uncured flow member such as grease or an adhesive that is uncured even after the first substrate or the second substrate is placed on the mounting surface, a thermosetting resin, or the like. Includes a curable flow member that can be cured after the first substrate or the second substrate, such as the adhesive, is placed on the mounting surface.

At least a part of the recess is the first substrate in the region of the first mounting surface that overlaps with the first substrate and the edge of the region of the second mounting surface that overlaps with the second substrate. It is preferably located in the region where the distance from the side edge is minimized.

The excess flow member has the minimum distance between the edge of the region overlapping the first substrate on the first mounting surface on the second substrate side and the edge of the region overlapping the second substrate on the second mounting surface on the first substrate side. It tends to accumulate from the area where it becomes. In this light source unit, since the recess is located in such a region, a part of the surplus flow member is on the surface opposite to the first mounting surface side of the first substrate and on the second mounting surface side of the second substrate. Adhesion on the surface opposite to the above can be appropriately suppressed. Therefore, it is possible to appropriately prevent a part of the surplus flow member from adhering to the light emitting element mounted on the first substrate or the light emitting element mounted on the second substrate.

At least a part of the recess passes through one end of the light emitting element of at least one of the first substrate and the second substrate in a direction perpendicular to the direction from the first substrate side to the second substrate side. It is preferably located between a first straight line parallel to the direction from the substrate side to the second substrate side and a second straight line passing through the other end and parallel to the first straight line.

With this configuration, a part of the surplus flow member is from the portion of the edge on the second substrate side when the first substrate is viewed in a plan view, which is close to the light emitting element mounted on the first substrate. Adhesion to the surface of the first substrate opposite to the first mounting surface side can be suppressed. Further, when the second substrate is viewed in a plan view, the surface opposite to the second mounting surface side of the second substrate from the portion of the edge on the first substrate side that is close to the light emitting element mounted on the second substrate. It can suppress adhesion to the top. Therefore, it is possible to appropriately prevent a part of the surplus flow member from adhering to the light emitting element mounted on the first substrate or the light emitting element mounted on the second substrate.

The heat sink has an edge on the second substrate side of a region overlapping the first substrate on the first mounting surface and an edge on the first substrate side of a region overlapping the second substrate on the second mounting surface. It has two surfaces arranged from the first mounting surface side to the second mounting surface side, the angle formed by the two surfaces is smaller than 180 degrees, and the recess is 2 It is preferably formed between the two surfaces and connected to the two surfaces.

In this light source unit, as described above, the heat sink has an edge on the second substrate side of the region overlapping the first substrate on the first mounting surface and the first substrate side of the region overlapping the second substrate on the second mounting surface. It has two surfaces arranged from the first mounting surface side to the second mounting surface side between the edges. Therefore, a part of the surplus flow member from the first substrate side to the second substrate side can be extruded onto the surface of the two surfaces on the first mounting surface side. On the other hand, a part of the surplus flow member from the second substrate side to the first substrate side can be extruded onto the surface of the two surfaces on the second mounting surface side. By the way, when the flow member is located on two surfaces whose angle is smaller than 180 degrees and the two surfaces are visible from above, the flow members on at least one surface are these two. There is a tendency toward the space between the surfaces, and the flow member tends to accumulate between the two surfaces. As a state in which the two surfaces are visible from the upper side, for example, a state in which the two surfaces intersect in a substantially V shape can be mentioned. In this light source unit, the angle formed by the two surfaces is made smaller than 180 degrees as described above, and the recess is formed between the two surfaces and connected to the two surfaces. Therefore, at least one of the surplus flow member extruded on the surface on the first mounting surface side and the surplus flow member extruded on the surface on the second mounting surface side tends to face the recess. Therefore, the recess can appropriately accommodate a part of at least one of the flow member from the first substrate side to the second substrate side and the flow member from the second substrate side to the first substrate side. Therefore, it is possible to appropriately prevent the excess flow member from adhering to at least one of the light emitting element mounted on the first substrate and the light emitting element mounted on the second substrate.

Alternatively, the recess is located on the first recess that is recessed on the side opposite to the first substrate side from the first mounting surface and on the second mounting surface side of the first recess, and the second mounting is performed. A second recess that is recessed on the side opposite to the second substrate side with respect to the surface may be included.

With this configuration, compared to the case where there is only one recess, a part of the excess flow member that accumulates between the first substrate and the second substrate is on the side opposite to the first mounting surface side of the first substrate. It is possible to suppress the adhesion on the surface of the second substrate or on the surface opposite to the second mounting surface side of the second substrate. Therefore, it is possible to prevent the surplus flow member from adhering to the light emitting element mounted on the first substrate or the light emitting element mounted on the second substrate.

The normal of the first mounting surface extending toward the first substrate side may intersect with the normal of the second mounting surface extending toward the second substrate side.

With this configuration, the angle formed by the first mounting surface and the second mounting surface is smaller than 180 degrees. Therefore, as described above, excess flow members tend to accumulate between the first mounting surface and the second mounting surface, that is, between the first substrate and the second substrate. Therefore, the light source unit is useful when the angle formed by the first mounting surface and the second mounting surface is smaller than 180 degrees.

At least one of the light emitting elements of the first substrate and the second substrate may be located on the other substrate side of the one substrate on which the light emitting element is mounted rather than the one substrate side.

With this configuration, the surplus flow member accumulated between the first substrate and the second substrate easily adheres to at least one of the first substrate and the second substrate. Therefore, the light source unit is useful when at least one of the light emitting elements of the first substrate and the second substrate is located on the other substrate side of the one substrate on which the light emitting element is mounted rather than the one substrate side. is there.

Further, the light source unit according to the second aspect of the present invention includes a first substrate and a second substrate on which a light emitting element is mounted, a first mounting surface on which at least a part of the first substrate is mounted, and the above. A mounting member having a second mounting surface on which at least a part of the second substrate is mounted, a first connecting portion connected to the mounting surface on which the light emitting element of the first substrate is mounted, and the second substrate. A flexible printed circuit board having a second connecting portion connected to a mounting surface on which the light emitting element is mounted is provided, and the first board and the second board are provided on the mounting member at a predetermined interval. The normal line on which the first mounting surface extends toward the first substrate intersects with the normal line extending toward the second substrate side of the second mounting surface, and the flexible printed circuit board is the first. Between the 1st substrate and the 2nd substrate, it bends convexly toward the mounting member side, and the region on the first mounting surface side of the 1st connection portion and the 2nd connection portion. It is characterized by passing through at least one of the areas on the second mounting surface side.

In this light source unit, since the normal extending toward the first substrate side of the first mounting surface intersects the normal extending toward the second substrate side of the second mounting surface as described above, the first substrate and the second substrate are used. The angle between the two is smaller than 180 degrees. Further, the flexible printed circuit board bends convexly toward the mounting member side between the first board and the second board, and also has a region on the first mounting surface side and a second connection with respect to the first connection portion. It passes through at least one of the regions on the second mounting surface side of the portion. Therefore, a force pressed against the substrate side to which the connecting portion is connected may act on at least one of the first connecting portion and the second connecting portion. Therefore, it is possible to suppress peeling from the substrate to which the connecting portion is connected at at least one of the first connecting portion and the second connecting portion, and it is possible to suppress the occurrence of poor connection between the first substrate and the second substrate. Therefore, it can be a light source unit capable of suppressing defects.

Further, in the light source unit of the second aspect, at least one of the first substrate and the second substrate extends from the outer edge of the other substrate side to a predetermined position when the one substrate is viewed in a plan view. It is preferable that a notch is formed and the flexible printed circuit board passes through the notch.

In order to bend the flexible printed circuit board, the length of the flexible printed circuit board is required to some extent, so that the first substrate is separated from the second substrate to some extent. In this light source unit, as described above, at least one of the first substrate and the second substrate has a notch extending from the outer edge of the other substrate side to a predetermined position when the one substrate is viewed in a plan view. The flexible printed circuit board passes through the notch. Therefore, the flexible printed circuit board can be bent between the first substrate and the second substrate without increasing the distance between the first substrate and the second substrate. Therefore, the distance between the first substrate and the second substrate can be shortened as compared with the case where the notch is not formed on at least one of the first substrate and the second substrate, and the light source unit can be miniaturized.

Further, in the light source unit of the second aspect, when a notch is formed in at least one of the first substrate and the second substrate, the light emitting element mounted on the one substrate uses the one substrate. When viewed in a plan view, it is preferable that the notch is arranged on the other substrate side rather than the edge on the opposite side of the other substrate side.

As described above, when the above-mentioned notch is not formed on at least one of the first substrate and the second substrate, the first substrate and the second substrate are separated to some extent in order to bend the flexible printed circuit board. I need to let you. Therefore, the light emitting element mounted on the first substrate and the light emitting element mounted on the second substrate are also separated to some extent. However, in this light source unit, the light emitting element mounted on one substrate is arranged on the other substrate side rather than the edge on the opposite side to the other substrate side in the notch when one substrate is viewed in a plan view. Therefore, as compared with the case where the notch is not formed on at least one of the first substrate and the second substrate, the distance between the first substrate and the second substrate is shortened as described above, and the substrate is mounted on the first substrate. The distance between the light emitting element to be generated and the light emitting element mounted on the second substrate can also be shortened. Therefore, an optical member such as a reflector that reflects light emitted from these two light emitting elements can be miniaturized.

Further, in the light source unit of the second aspect, the mounting member is more flexible than at least one of the first mounting surface and the second mounting surface between the first substrate and the second substrate. It is preferable that the flexible printed circuit board has a recess on the side opposite to the printed circuit board side, and the flexible printed circuit board passes through the recess.

With this configuration, the amount of deflection of the flexible printed circuit board can be increased as compared with the case where the mounting member does not have a recess. Therefore, at least one of the first connection portion and the second connection portion can be appropriately pressed by the substrate side to which the connection portion is connected. Therefore, peeling from the substrate to which the connecting portion is connected can be further suppressed at at least one of the first connecting portion and the second connecting portion.

Further, in the light source unit of the second aspect, it is preferable that the flexible printed circuit board is not in contact with the mounting member.

For example, when the light source unit is used for a vehicle lamp, the light source unit vibrates due to the vibration of the vehicle. When the flexible printed circuit board is in contact with the mounting member while the light source unit vibrates in this way, the flexible printed circuit board and the mounting member tend to rub against each other. When the flexible printed circuit board and the mounting member rub against each other, there is a risk that problems such as disconnection of the wiring formed on the flexible printed circuit board may occur. In this light source unit, since the flexible printed circuit board is not in contact with the mounting member as described above, it is possible to prevent the flexible printed circuit board and the mounting member from rubbing against each other due to vibration of the light source unit or the like. Therefore, it is possible to suppress problems such as disconnection of the wiring formed on the flexible printed circuit board.

Further, in the light source unit of the second aspect, the flexible printed circuit board has a plurality of wirings extending from the first connection portion to the second connection portion, and slits are formed between the wirings adjacent to each other. It is preferable to be done.

With this configuration, at least a part of the wiring adjacent to each other can be spatially separated by a slit. Therefore, as compared with the case where slits are not formed between the wirings adjacent to each other, even if migration occurs in the wirings, it is possible to reduce the occurrence of defects due to a short circuit.

Further, in the light source unit of the second aspect, the two flexible printed circuit boards are provided, and the center of gravity of at least one of the first board and the second board is connected to the one board. It may be located between the respective connections of the flexible printed circuit board.

With this configuration, the first board and the second board are connected by two flexible printed circuit boards, and in a state before these boards are mounted on the mounting member, the first of the two flexible printed circuit boards. The stress generated in the 1 connection portion and the 2nd connection portion can be suppressed. Specifically, it is possible to prevent the flexible printed circuit board from being twisted, for example, when one substrate is suspended from the other substrate. Therefore, the stress generated in at least one of the first connection portion and the second connection portion of the two flexible printed circuit boards can be suppressed. Therefore, in the state before the first substrate and the second substrate are mounted on the mounting member, it is possible to prevent at least one of the first connecting portion and the second connecting portion from being separated from the substrate to which the connecting portion is connected. Can be done. Therefore, as compared with the case where the center of gravity of at least one of the first board and the second board is not located between the connections with each of the two flexible printed circuit boards connected to the one board, these The handling of the substrate becomes easy, and the productivity of the light source unit is improved.

The light source unit according to the third aspect of the present invention includes a substrate on which a light emitting element is mounted and a through hole penetrating in the plate thickness direction is formed, a mounting surface on which at least a part of the substrate is mounted, and the above-described mounting. A rib that is inclined with respect to the normal of the surface and is inserted into the through hole of the substrate, and a mounting member having a contact surface that abuts a part of the side surface of the substrate are provided, and the above-mentioned mounting surface is flat. At least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the rib in the direction perpendicular to the extending direction of the rib when viewed is a part of the inner peripheral surface of the substrate that defines the through hole. The tangent line between a part of the side surface of the substrate and the contact surface when they are in contact with each other and the above-mentioned mounting surface is viewed in a plan view is not parallel to the extending direction of the rib.

In this light source unit, at least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the rib in the direction perpendicular to the extending direction of the rib when the mounting surface is viewed in a plane as described above has a through hole. It comes into contact with a part of the inner peripheral surface of the specified substrate. Therefore, the position of the substrate with respect to the mounting member can be regulated within a predetermined range in the direction perpendicular to the direction in which the ribs extend when the mounting surface is viewed in a plan view. Further, the tangent line between a part of the side surface of the substrate and the contact surface that abuts a part of the side surface of the substrate when the mounting surface is viewed in a plane as described above is not parallel to the extending direction of the rib. .. Therefore, the position of the substrate with respect to the mounting member can be regulated within a predetermined range in the extending direction of the rib when the mounting surface is viewed in a plan view. Therefore, while restricting the position of the substrate with respect to the mounting member within a predetermined range, the outer peripheral surface of the rib defines the through hole in the vicinity of the edge on the mounting surface side and the side opposite to the mounting surface side. It is possible to suppress contact with at least one of the vicinity of the edge of the. Therefore, it is possible to suppress the influence of unevenness formed in the vicinity of the edge on the mounting surface side or the edge on the opposite side to the mounting surface side of the inner peripheral surface of the substrate that defines the through hole. Therefore, the position of the light emitting element with respect to an optical member such as a reflector that reflects the light emitted from the light emitting element can be regulated within a predetermined range. Therefore, it can be a light source unit capable of forming a desired light distribution.

The contact surface does not have to be in constant contact with a part of the side surface of the substrate, and may be in contact with the substrate when it moves along the mounting surface. Further, at least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the rib in the direction perpendicular to the extending direction of the rib when the mounting surface is viewed in a plan view is the inner peripheral surface of the substrate that defines the through hole. It does not have to be in constant contact with a part of. These outer peripheral surfaces of the ribs may be in contact with each other as the substrate moves along the mounting surface.

Further, in the light source unit of the third aspect, the mounting member further includes a rib reinforcing portion connected to a surface on which the rib is formed and an outer peripheral surface of the rib on the side tilted with respect to the previously described mounting surface. It is preferable to have.

With such a configuration, the strength of the rib is improved as compared with the case where the rib reinforcing portion is not provided, and damage to the rib can be suppressed. Therefore, it is possible to suppress the displacement of the substrate with respect to the mounting member, and it is possible to suppress the change in the light distribution.

Further, in the light source unit of the third aspect, the mounting member further has a protrusion on which the contact surface is formed, and the rib protrudes from the protrusion in the normal direction of the above-mentioned mounting surface. Is preferable.

With this configuration, the ribs can be inserted into the through holes of the substrate before the substrate abuts on the protrusions. Therefore, the position of the substrate with respect to the mounting member can be regulated to some extent by the ribs inserted into the through holes, and the substrate can be mounted on the mounting surface in such a regulated state. Therefore, the substrate can be easily mounted on the mounting surface.

Further, in the light source unit of the third aspect, the mounting member further has a second mounting surface on which at least a part of the second substrate on which the light emitting element is mounted is mounted and is non-parallel to the previously described mounting surface. , The second mounting surface may be visible when viewed from the extending direction of the rib.

When a mounting member having two mounting surfaces that are non-parallel to each other is formed by mold molding, the normal of at least one mounting surface is non-parallel to the mold opening direction. Therefore, when a rib is formed on a mounting surface whose normal line is not parallel to the mold opening direction, the rib extends in the mold opening direction and is inclined with respect to the normal line of the mounting surface from the viewpoint of productivity. Tends to be. Since the second mounting surface is visible when the mounting member is viewed from the extending direction of the rib, the mounting member can be formed by molding with the mold opening direction as the extending direction of the rib. Therefore, even if the mounting member has two mounting surfaces that are not parallel to each other, the mounting member is inclined with respect to the normal of the mounting surface as described above while suppressing a decrease in productivity of the mounting member. Ribs can be used to regulate the position of the substrate with respect to the mounting member within a predetermined range.

The method for manufacturing a mounting member according to a fourth aspect of the present invention is a method for manufacturing a mounting member on which a substrate is mounted, wherein the mounting member is a mounting surface on which at least a part of the substrate is mounted. It has a rib that is inclined with respect to the normal line of the mounting surface, and a contact surface that contacts a part of the side surface of the substrate, and the contact surface extends the rib when the previously described mounting surface is viewed in a plan view. A mold forming step of forming a temporary mounting surface that is non-parallel to the existing direction and covers the above-mentioned mounting surface, a temporary contact surface that covers the contact surface, and an intermediate member having the ribs by mold molding. A cutting step of cutting the temporary mounting surface and the temporary contact surface to form the previously described mounting surface and the contact surface is provided, and the contact with at least a part of the previously described mounting surface in the cutting step. It is characterized by forming at least a part of a surface at the same time.

In this method of manufacturing the mounting member, at least a part of the mounting surface and at least a part of the contact surface are formed at the same time in the cutting process as described above, so that at least a part of the mounting surface and at least a contact surface are formed. The productivity of the mounting member can be improved as compared with the case where a part is not formed at the same time.

The light source unit according to the fifth aspect of the present invention has a substrate on which a light emitting element is mounted, a mounting surface on which at least a part of the substrate is mounted, and a contact surface that abuts a part of a side surface of the substrate. It is characterized by including a mounting member to be provided, and at least a pressing member that contacts a contact portion on a mounting surface on the substrate on which the light emitting element is mounted and presses the substrate against the above-mentioned mounting surface and the contact surface. To do.

In this light source unit, the substrate is pressed against the mounting surface and the contact surface by the pressing member. Therefore, even when the light source unit vibrates, it is possible to prevent the substrate from being lifted from the mounting surface and the substrate from being displaced along the mounting surface in the direction opposite to the pressing direction against the contact surface. Therefore, it is possible to prevent the light emitting element from being displaced with respect to an optical member such as a reflector that reflects the light emitted from the light emitting element. Therefore, it can be a light source unit capable of forming a desired light distribution.

Further, in the light source unit of the fifth aspect, the contact surface is located in the direction of the force with which the pressing member presses the substrate against the contact surface rather than the contact portion when the substrate is viewed in a plan view. It may be said.

Further, in the light source unit of the fifth aspect, at least a part of the contact surface is parallel to the direction of the force with which the pressing member presses the substrate against the contact surface when the substrate is viewed in a plan view. It is preferably located between a straight line passing through one end of the contact portion in a direction perpendicular to the straight line and another straight line parallel to the straight line and passing through the other end of the contact portion.

With this configuration, the force with which the pressing member presses the substrate against the contact surface is directed from the contact portion in contact with the pressing member on the substrate toward the contact surface. Therefore, the pressing member can appropriately press the substrate against the contact surface, and even when the light source unit vibrates, the substrate is displaced along the mounting surface in the direction opposite to the pressing direction with respect to the contact surface. Can be suppressed appropriately.

Further, in the light source unit of the fifth aspect, the substrate has two contact portions, and at least a part of the contact surface is such that the pressing member presses the substrate when the substrate is viewed in a plan view. A straight line parallel to the direction of the force pressing against the contact surface and passing through the end opposite to the other contact portion side in one said contact portion, and one said contact portion side in the other said contact portion parallel to the straight line. It is preferably located between and another straight line passing through the opposite end.

With this configuration, when the contact surface views the substrate in a plan view, the side opposite to the other straight line side with respect to the above one straight line or the side opposite to the one straight line side with respect to the other straight line. The support plate can properly press the substrate against the contact surface as compared to the case where it is located at. Therefore, even when the light source unit vibrates, it is possible to appropriately prevent the substrate from shifting along the mounting surface in the direction opposite to the pressing direction with respect to the contact surface.

Further, in the light source unit of the fifth aspect, it is preferable that the pressing member has elasticity and the substrate is pressed against the above-mentioned mounting surface and the contact surface by the elastic force of the pressing member.

With this configuration, even if a part of the side surface of the substrate and the contact surface are separated due to vibration of the light source unit or the like, a part of the side surface of the substrate and the contact surface are hit by the elastic force of the pressing member. Can be touched. That is, even if the substrate is displaced along the mounting surface along the mounting surface in the direction opposite to the pressing direction against the contact surface due to vibration of the light source unit or the like, the substrate can be moved to substantially the same position as before the displacement.

The light source unit according to the sixth aspect of the present invention includes a first substrate and a second substrate on which a light emitting element is mounted, a first mounting surface on which at least a part of the first substrate is mounted, and the second substrate. A heat sink having a second mounting surface on which at least a part of the substrate is mounted is provided, and the first substrate and the second substrate are mounted on the heat sink at a predetermined interval, and the first substrate is mounted on the heat sink. The normal line extending toward the first substrate side of the mounting surface intersects with the normal line extending toward the second substrate side of the second mounting surface.

With this configuration, the light emitting element mounted on the first substrate and the light emitting light mounted on the second substrate are compared with the case where the first mounting surface and the second mounting surface are located on the same plane. It is possible to increase the distance between these light emitting elements along the surface of the heat sink while shortening the distance from the elements. Therefore, the heat generated by these light emitting elements can be more appropriately dispersed in the heat sink, and the region between these light emitting elements in the heat sink can be suppressed from being overheated. Further, the distance between the two light emitting elements can be shortened as compared with the case where the first mounting surface and the second mounting surface are located on the same plane, and the size can be reduced. Therefore, the light source unit can be miniaturized while suppressing overheating of the heat sink.

Further, in the light source unit of the sixth aspect, the light source unit further includes a fan, and the heat sink has a first base plate on which the first mounting surface is formed on one surface and the heat sink on one surface. It has a second base plate on which a second mounting surface is formed, a part of the outer edge of the first base plate and a part of the outer edge of the second base plate are connected to each other, and the fan is the fan. It is preferable to form a flow of air on the other surface of the first base plate and the other surface of the second base plate.

With this configuration, it is possible to prevent the fan from staying in the vicinity of the other surface of the first base plate and the other surface of the second base plate, and the first base plate is compared with the case where the fan is not provided. And the second base plate can be cooled. The fan may form an air flow on the other surface of the first base plate by sending air toward the other surface of the first base plate and the other surface of the second base plate, and may form an air flow in the vicinity of these other surfaces. The air flow in the surface may be formed by sucking the air in the above. Further, the first mounting surface is formed on one surface of the first base plate which is a plate member, and the second mounting surface is formed on one surface of the second base plate which is a plate member. Therefore, the other surface of the first base plate is inclined with respect to the other surface of the second base plate, and the angle formed by the other surface of the first base plate and the other surface of the second base plate is Greater than 180 degrees. For this reason, both of these two other surfaces may be perpendicular to the air flow direction between the surface and the fan, or the angle between the two other surfaces may be smaller than 180 degrees. These other surfaces are less likely to resist the flow of air formed by the fan than if they were. Therefore, it is possible to suppress a decrease in the flow velocity of air in the vicinity of these surfaces. Therefore, the fan can cool the first base plate and the second base plate more appropriately.

Further, in the light source unit of the sixth aspect, when the light source unit includes a fan, the heat sink has a tubular peripheral wall in which at least a part of one end is fixed to the first base plate and the second base plate. The fan forms a flow of air through an opening at the other end of the peripheral wall portion and has a vent that communicates the portion and the internal space and the external space of the peripheral wall portion. At least a part of the cross section perpendicular to the other surface of the first base plate and the other surface of the second base plate is on the fan side of the connection portion between the first base plate and the second base plate. It is preferably arranged on the opposite side of the.

Here, the flow of air passing through the opening at the other end of the peripheral wall portion includes the flow of air flowing from the external space of the peripheral wall portion to the internal space through this opening and the internal space to the external space of the peripheral wall portion passing through this opening. Includes the flow of air flowing through. When the fan forms a flow of air flowing from the external space of the peripheral wall to the internal space through the opening of the peripheral wall, a part of the air flowing into the internal space of the peripheral wall from this opening passes through the internal space of the peripheral wall. Toward the other surface of the first base plate and the other surface of the second base plate. Then, a part of this air flows out to the external space of the peripheral wall portion through the vent. In this way, the air directed by the fan toward the other surface of the first base plate and the other surface of the second base plate is suppressed from being diffused by the peripheral wall portion as compared with the case where there is no peripheral wall portion. Therefore, the amount of air toward the other surface of the first base plate and the other surface of the second base plate can be increased, and the first base plate and the second base plate can be cooled more appropriately. Further, as described above, at least a part of the vent is a connection between the first base plate and the second base plate in a cross section perpendicular to the other surface of the first base plate and the other surface of the second base plate. It is placed on the side opposite to the fan side from the part. Therefore, it is possible to prevent air from staying in the vicinity of the other surface of the first base plate and the other surface of the second base plate, and the first base plate and the second base plate can be cooled more appropriately. On the other hand, when the fan forms a flow of air flowing from the internal space of the peripheral wall portion to the external space through the opening of the peripheral wall portion, the air flows into the internal space of the peripheral wall portion from the vent. A part of the air flowing in from this vent passes through the internal space of the peripheral wall portion and flows out to the external space of the peripheral wall portion from the opening at the other end of the peripheral wall portion. Here, as described above, at least a part of the vent is a cross section of the first base plate and the second base plate in a cross section perpendicular to the other surface of the first base plate and the other surface of the second base plate. It is arranged on the side opposite to the fan side from the connection portion. Therefore, a part of the air flowing in from the vent passes near the other surface of the first base plate and the other surface of the second base plate and goes to the opening at the other end of the peripheral wall portion. That is, the air in the vicinity of these other surfaces is sucked by the fan. Therefore, the fan can suck more air in the vicinity of these other surfaces than in the absence of the peripheral wall. Therefore, it is possible to prevent air from staying in the vicinity of these other surfaces, and the first base plate and the second base plate can be cooled more appropriately. It is sufficient that the fan can form at least one of the air flow that passes through the opening of the peripheral wall portion and flows from the external space of the peripheral wall portion to the internal space, and the air flow that passes through this opening and flows from the internal space of the peripheral wall portion to the external space. .. For example, the fan may be capable of switching the flow of air it forms.

Further, in the light source unit of the sixth aspect, when the heat sink has a peripheral wall portion, it is preferable that the peripheral wall portion surrounds the outer periphery of the fan.

With this configuration, when the fan forms a flow of air that flows from the external space of the peripheral wall to the internal space through the opening of the peripheral wall, the peripheral wall does not surround the outer periphery of the fan. The amount of air towards the other surface of the 1 base plate and the other surface of the second base plate can be increased. On the other hand, when the fan forms a flow of air flowing from the internal space of the peripheral wall portion to the external space through the opening of the peripheral wall portion, the fan is a first base plate as compared with the case where the peripheral wall portion does not surround the outer periphery of the fan. A large amount of air can be sucked in the vicinity of the other surface and the other surface of the second base plate. Therefore, the first base plate and the second base plate can be cooled more appropriately.

Further, in the light source unit of the sixth aspect, when the heat sink has a peripheral wall portion, at least a part of the first substrate and the second substrate is connected to the vent in the opening direction of the vent. It is preferable that they overlap.

With this configuration, when the fan forms a flow of air that flows from the external space of the peripheral wall to the internal space through the opening of the peripheral wall, one of the air that flows out from the vent to the external space of the peripheral wall. The unit can be directed to at least one of the first substrate and the second substrate. Therefore, at least one of the first substrate and the second substrate can be cooled by the heat sink and also directly by the air flowing out from the vent. On the other hand, when the fan forms a flow of air that flows from the internal space of the peripheral wall to the external space through the opening of the peripheral wall, a part of the air that tries to flow into the internal space of the peripheral wall from the vent is the first substrate. And can be allowed to flow along at least one of the second substrates. Therefore, at least one of the first substrate and the second substrate can be cooled by the heat sink and also directly by the air that is going to flow into the internal space of the peripheral wall portion from the vent. Therefore, the first substrate and the second substrate can be cooled more appropriately.

Further, in the light source unit of the sixth aspect, when the heat sink has a peripheral wall portion, the heat sink extends from the one end side of the peripheral wall portion toward the other end side at least in the internal space of the peripheral wall portion. It is preferable to further have at least one existing heat sink.

With this configuration, the turbulence of the air flow in the internal space of the peripheral wall portion is adjusted. Therefore, when the fan forms a flow of air flowing from the external space of the peripheral wall portion to the internal space through the opening of the peripheral wall portion, the other side of the first base plate is compared with the case where the heat sink does not have a straightening vane. The amount of air towards the surface and the other surface of the second base plate can be increased. On the other hand, when the fan forms a flow of air flowing from the internal space of the peripheral wall portion to the external space through the opening of the peripheral wall portion, the fan is the other side of the first base plate as compared with the case where the heat sink does not have a rectifying plate. A large amount of air can be sucked in the vicinity of the surface of the surface and the other surface of the second base plate. Therefore, the first base plate and the second base plate can be cooled more appropriately.

Further, in the light source unit of the sixth aspect, when the heat sink has a straightening vane, it is preferable that the straightening vane is connected to the first base plate and the second base plate.

After a part of the heat of the first substrate and the second substrate is transferred to the first base plate and the second base plate, it is transferred to a member connected to the first base plate and the second base plate, for example, a cylinder wall portion. Be distributed. In this light source unit, since the straightening vane is connected to the first base plate and the second base plate as described above, heat can be dispersed to the straightening vane as well, and the first base plate and the second base plate can be twisted. Can be cooled properly.

Further, in the light source unit of the sixth aspect, when the heat sink has a rectifying plate, it is preferable that the rectifying plate crosses the vent when viewed from the opening direction of the vent.

As described above, the straightening vane extends from one end side of the peripheral wall portion to the other end side in the internal space of the peripheral wall portion. Therefore, in the internal space of the peripheral wall portion, a space sandwiched between the peripheral wall portion and the straightening vane can be formed. Further, when the heat sink has a plurality of straightening vanes, a space sandwiched by the plurality of straightening vanes may be formed. In this light source unit, since the straightening vane crosses the vent when viewed from the opening direction of the vent as described above, any of the above spaces that can be formed in the internal space of the peripheral wall portion communicate with the vent. Therefore, it is possible to suppress the retention of air in the internal space of the peripheral wall portion, and the first base plate and the second base plate can be cooled more appropriately.

Further, in the light source unit of the sixth aspect, when the rectifying plate crosses the vent when viewed from the opening direction of the vent, at least one of the first substrate and the second substrate is used in the opening direction of the vent. A part of one substrate overlaps with the vent, and at least one of the rectifying plates has a projecting portion protruding from the vent to the external space of the peripheral wall portion, and the projecting portion is of the vent. When viewed from the opening direction, it is preferable to come into contact with the substrate overlapping the vent.

With this configuration, the protruding portion also serves as a part of the first mounting surface or the second mounting surface, and does not serve as a part of the first mounting surface or the second mounting surface. The area of the first mounting surface or the second mounting surface is increased as compared with the above. Therefore, at least one of the first substrate and the second substrate can be placed more stably. Further, since the straightening vane extends in the internal space of the peripheral wall portion as described above, it is cooled by the air flowing through the internal space of the peripheral wall portion by the fan. Since the protrusion of the straightening vane to be cooled in this way contacts at least one of the first substrate and the second substrate, the substrate with which the straightening vane comes into contact can be cooled more appropriately. Further, since the protruding portion of the straightening vane protrudes from the vent to the external space of the peripheral wall portion, the turbulence of the air flow in the vicinity of the vent is adjusted by this protruding portion, and the air is more appropriately flowed from the vent to the peripheral wall portion. It can flow out to the external space or flow into the internal space of the peripheral wall from the vent. Therefore, the first substrate and the second substrate can be cooled more appropriately.

Further, in the light source unit of the sixth aspect, when the heat sink has a peripheral wall portion, the vent has the cross section perpendicular to the other surface of the first base plate and the other surface of the second base plate. Includes a first vent arranged on the side of the first base plate and a second vent arranged on the side of the second base plate with respect to the connection portion between the first base plate and the second base plate. Is preferable.

With this configuration, when the fan forms a flow of air that flows from the external space of the peripheral wall to the internal space through the opening of the peripheral wall, of the air in the vicinity of the first base plate and the second base plate. , A part of the air on the first base plate side can flow out to the external space of the peripheral wall portion from the first vent arranged on the first base plate side. Further, a part of the air on the second base plate side may flow out to the external space of the peripheral wall portion from the first vent arranged on the second base plate side. Therefore, air can be more appropriately discharged to the external space of the peripheral wall portion, and the first base plate and the second base plate can be used as compared with the case where the vent is the first vent or the second vent. Can be cooled more appropriately. On the other hand, when the fan forms a flow of air flowing from the external space of the peripheral wall to the internal space through the opening of the peripheral wall, a part of the air flowing into the internal space of the peripheral wall from the first vent is used as the first base. It can be made to flow along the other side of the board. Further, a part of the air flowing from the second vent into the internal space of the peripheral wall portion may be allowed to flow along the other surface of the second base plate. Therefore, it is possible to appropriately prevent air from staying in the vicinity of the other surface of the first base plate and the other surface of the second base plate, and the vent is a first vent or a second vent. In comparison, the first base plate and the second base plate can be cooled more appropriately.

It is a figure which shows the lamp equipment which includes the light source unit which concerns on this embodiment. It is a perspective view of the lamp unit and the support unit shown in FIG. It is an exploded perspective view which views the lamp unit shown in FIG. 1 from the front side. It is an exploded perspective view which looks at the lamp unit shown in FIG. 1 from the rear side. It is a perspective view of a heat sink. It is the schematic sectional drawing of the heat sink. It is a front view of the 1st board, the 2nd board, and a flexible printed circuit board. It is a figure which shows the state which the 1st substrate was mounted on a heat sink. It is a figure which shows the state which the 1st substrate and the 2nd substrate are mounted on a heat sink. It is a figure which shows the appearance that the 2nd substrate was placed on the heat sink. 9 is a schematic cross-sectional view of the flexible printed circuit board in FIG. It is a perspective view of a light source unit. It is a front view of a light source unit. It is a schematic sectional view of a light source unit. It is a perspective view which views the support plate from the front side. It is a perspective view which views the support plate from the rear side. 9 is a diagram showing a state in which the second substrate in FIG. 9 is viewed in a plan view. It is a figure which shows the state that the 2nd substrate was fixed to a heat sink. It is a schematic sectional view of a lamp unit. It is a figure which shows the light distribution pattern. It is a flowchart which shows the manufacturing method of the heat sink shown in FIG. 4 to FIG. It is a schematic sectional drawing which shows a part of an intermediate member. It is a figure which shows the light source unit which concerns on 2nd Embodiment of this invention in the same manner as FIG. It is a figure which shows the light source unit which concerns on 3rd Embodiment of this invention in the same manner as FIG. It is a figure which shows the light source unit which concerns on 4th Embodiment of this invention in the same manner as FIG. It is a figure which shows the light source unit which concerns on 5th Embodiment of this invention in the same manner as FIG.

Hereinafter, embodiments for carrying out the light source unit according to the present invention will be illustrated together with the accompanying drawings. The embodiments illustrated below are for facilitating the understanding of the present invention, and are not for limiting the interpretation of the present invention. The present invention can be modified or improved from the following embodiments without departing from the spirit of the present invention.

(First Embodiment)
First, the configuration of the lamp of the present embodiment will be described.

FIG. 1 is a diagram showing a lamp equipped with a light source unit according to the present embodiment. In the present embodiment, the lamp is a vehicle headlight. Vehicle headlights are generally provided in each of the left and right directions in front of the vehicle, and the left and right headlights are configured to be substantially symmetrical in the left and right directions. Therefore, in the present embodiment, one of the vehicle headlights will be described.

As shown in FIG. 1, the vehicle headlight 1 of the present embodiment includes a housing 2, a lamp unit 3, and a support unit 4 as main configurations. Note that FIG. 1 is a side view of the vehicle headlight 1, and FIG. 1 shows a cross-sectional view of the housing 2 for easy understanding.

Next, the housing 2 will be described.

The housing 2 includes a lamp housing 11, a front cover 12, and a back cover 13 as main configurations. The front of the lamp housing 11 is open, and a translucent front cover 12 is fixed to the lamp housing 11 so as to close the opening. An opening smaller than the front is formed behind the lamp housing 11, and a back cover 13 is fixed to the lamp housing 11 so as to close the opening.

The space formed by the lamp housing 11, the front cover 12 that closes the front opening of the lamp housing 11, and the back cover 13 that closes the rear opening of the lamp housing 11 is referred to as a light chamber R. The lamp unit 3 and the support unit 4 are housed in the lamp chamber R.

Next, the support unit 4 will be described.

FIG. 2 is a perspective view of the lamp unit and the support unit shown in FIG. As shown in FIGS. 1 and 2, the support unit 4 includes a bracket 15, a first connection arm 16a, and a second connection arm 16b as main configurations. The bracket 15 is a frame-shaped body, and has a base portion 15a extending in the left-right direction, pillar portions 15b and 15c extending upward from both left and right ends of the base portion 15a, and 2 extending in the left-right direction. It has a support portion 15d connected to the upper ends of the pillar portions 15b and 15c. The lamp unit 3 is arranged between the base portion 15a and the support portion 15d. The upper part of the lamp unit 3 and the support portion 15d of the bracket 15 are connected by the first connection arm 16a, and the lamp unit 3 is suspended from the support portion 15d of the bracket 15. Further, the lower part of the lamp unit 3 and the base portion 15a of the bracket 15 are connected by the second connection arm 16b, and the base portion 15a side of the second connection arm 16b is not shown in the drive unit (not shown) attached to the base portion 15a. It is connected via the gear shown in the figure. In this way, the lamp unit 3 is attached to the bracket 15 by the first connection arm 16a and the second connection arm 16b. A drive unit (not shown) attached to the base portion 15a enables the lamp unit 3 to rotate in the left-right direction and tilt in the front-rear direction with respect to the bracket 15. The bracket 15 is fixed to the housing 2 by means (not shown).

Next, the lamp unit 3 will be described.

FIG. 3 is an exploded perspective view of the lamp unit shown in FIG. 1 viewed from the front side, and FIG. 4 is an exploded perspective view of the lamp unit shown in FIG. 1 viewed from the rear side. Note that FIGS. 3 and 4 also show the first connection arm 16a and the second connection arm 16b of the support unit 4. As shown in FIGS. 3 and 4, the lamp unit 3 of the present embodiment includes a projection lens 20, a lens holder 25, and a light source unit LU as main configurations.

Next, the light source unit LU will be described.

As shown in FIGS. 3 and 4, the light source unit LU of the present embodiment includes a support plate 30 as a pressing member, a reflector unit 40, a first substrate 50, a second substrate 60, and two flexible printed circuits. A substrate 70, a heat sink 80 as a mounting member, and a fan 81 are mainly provided.

Next, the heat sink 80 will be described.

FIG. 5 is a perspective view of the heat sink, and FIG. 6 is a schematic cross-sectional view of the heat sink. Note that FIG. 6 also shows a fan 81. As shown in FIGS. 4 to 6, the heat sink 80 is formed of, for example, metal, and includes a first base plate 82, a second base plate 83, a peripheral wall portion 84, and a straightening vane 85 as main configurations.

The first base plate 82 is a plate-like body extending diagonally upwardly forward and to the left and right. In the present embodiment, the first mounting surface 86, the first rib 87, the boss 88, and the recess 89 are formed on the front surface 82f of the first base plate 82. The first mounting surface 86 is a surface on which at least a part of the first substrate 50 is mounted, and is an end surface of a pedestal 90 projecting forward from the front surface 82f of the first base plate 82, and is a surface of the first base plate 82. It is substantially parallel to the front surface 82f. In addition, the term "generally parallel" in the present specification includes not only a completely parallel state but also a state in which one is tilted by about 1 ° with respect to the other from the completely parallel state. The outer edge 86e located at the lower end of the outer edge of the first mounting surface 86 extends in the left-right direction.

As shown in FIG. 5, a first rib 87 is formed in a region on the lower side of the front surface 82f of the first base plate 82, and the first rib 87 projects forward from the front surface 82f. Therefore, the first rib 87 is inclined with respect to the normal of the first mounting surface 86. The first rib 87 extends from the lower side to the upper side when the first mounting surface 86 is viewed in a plan view, and is inclined upward with respect to the first mounting surface 86. In the present embodiment, the shape of the cross section perpendicular to the longitudinal direction of the first rib 87 is circular.

Two bosses 88 are formed on the upper side of the first rib 87, and project forward from the front surface 82f of the first base plate 82 in the same manner as the first rib 87. Therefore, the boss 88 is inclined with respect to the normal of the first mounting surface 86. Each boss 88 extends from the bottom to the top when the first mounting surface 86 is viewed in a plan view, and is inclined upward with respect to the first mounting surface 86. A contact surface 88s substantially perpendicular to the first mounting surface 86 is formed on the outer peripheral surface on the lower side of each boss 88. In addition, the term "generally vertical" in the present specification includes not only a completely vertical state but also a state in which one is tilted by about 1 ° with respect to the other from the completely vertical state. In the present embodiment, the contact surface 88s of each boss 88 is a plane extending to the left and right when the first mounting surface 86 is viewed in a plane, and the first rib 87 is viewed in a plan view of the first mounting surface 86. It is said that it is not parallel to the vertical direction, which is the extending direction of.

Recesses 89 are formed on the right side and the left side of the first mounting surface 86, respectively. The recess 89 is a portion where the front surface 82f of the first base plate 82 is recessed on the side opposite to the first mounting surface 86 side. In the present embodiment, the recess 89 is recessed in an arc shape in a vertical cross section as described later.

The second base plate 83 is a plate-like body extending diagonally downwardly forward and to the left and right. The upper outer edge of the second base plate 83 is connected to the lower outer edge of the first base plate. In the present embodiment, a second mounting surface 91, a second rib 92, a rib reinforcing portion 93, a protrusion 94, and two bosses 100 are formed on the front surface 83f of the second base plate 83. The second mounting surface 91 is a surface on which at least a part of the second substrate 60 is mounted, and is an end surface of a pedestal 95 projecting forward from the front surface 83f of the second base plate 83, and is a second base plate 83. It is almost parallel to the front surface 83f of. Therefore, the normal extending toward the second substrate 60 side of the second mounting surface 91 intersects with the normal extending toward the first substrate 50 side of the first mounting surface 86, and the first mounting surface 86 and the second mounting surface 86 are mounted. The angle formed by the placing surface 91 is less than 180 degrees. Therefore, the first mounting surface 86 and the second mounting surface 91 are not parallel to each other, and the angle formed by the first substrate 50 and the second substrate 60 is smaller than 180 degrees. Further, since the first base plate 82 and the second base plate 83 are plate-like bodies, the back surface 82b of the first base plate 82 is inclined with respect to the back surface 83b of the second base plate 83, and the first base plate The angle formed by the back surface 82b of the 82 and the back surface 83b of the second base plate 83 is larger than 180 degrees. Specifically, the back surface 82b of the first base plate 82 is inclined diagonally upward toward the front, and the back surface 83b of the second base plate 83 is inclined diagonally downward toward the front. Note that FIG. 6 is a cross-sectional view perpendicular to the front surface 82f of the first base plate 82 and the front surface 83f of the second base plate 83. Since the first base plate 82 and the second base plate 83 are plate-like bodies as described above, FIG. 6 shows a cross section perpendicular to the back surface 83b of the first base plate 82 and the back surface 83b of the second base plate 83. It is also a figure. Further, the outer edge 91e located at the upper end of the outer edge of the second mounting surface 91 on the side of the first mounting surface 86 is located at the lower end of the outer edge of the first mounting surface 86 on the side of the second mounting surface 91. It is generally parallel to the located outer edge 86e.

As shown in FIG. 5, a second rib 92 is formed in a region on the lower side of the front surface 83f of the second base plate 83, and the second rib 92 projects forward from the front surface 83f of the second base plate 83. ing. Therefore, the second rib 92 is inclined with respect to the normal line of the second mounting surface 91. The second rib 92 extends from the upper side to the lower side when the second mounting surface 91 is viewed in a plan view, and is inclined downward with respect to the second mounting surface 91. In the present embodiment, the shape of the cross section perpendicular to the longitudinal direction of the second rib 92 is circular. Further, the second rib 92 and the above-mentioned first rib 87 are substantially parallel to each other. The second mounting surface 91 is visible when viewed from the front, which is the tip end side of the first rib 87 in the extending direction of the first rib 87. Further, the first mounting surface 86 is visible when viewed from the front side of the tip end side of the second rib 92 in the extending direction of the second rib 92.

A rib reinforcing portion 93 is formed on the lower side of the outer peripheral surface of the second rib 92, and the rib reinforcing portion 93 is connected to the front surface 83f of the second base plate 83. The rib reinforcing portion 93 prevents the second rib 92 from tilting downward with respect to the second mounting surface 91. Further, the strength of the second rib 92 is improved as compared with the case where the rib reinforcing portion 93 is not provided. In the present embodiment, the rib reinforcing portion 93 is not in contact with the second substrate 60.

Protrusions 94 are formed on both sides of the second base plate 83 in the left-right direction. Each protrusion 94 projects from the front surface 83f of the second base plate 83 in the normal direction of the second mounting surface 91. A contact surfaces 94s that are substantially perpendicular to the second mounting surface 91 are formed on the outer peripheral surfaces on the upper side and the lower side of each protrusion 94, respectively. In the present embodiment, the contact surface 94s is a plane extending to the left and right when the second mounting surface 91 is viewed in a plane, and in the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plane. It is said to be non-parallel to a certain vertical direction. Further, the second rib 92 protrudes from the protrusion 94 in the normal direction of the second mounting surface 91.

Bosses 100 are formed on both sides of the second base plate 83 in the left-right direction, and the protrusions 94 are located between the two bosses 100. Each boss 100 projects forward from the front surface 83f of the second base plate 83 substantially parallel to the second rib 92. The tip of each boss 100 is a flat surface that is substantially vertical and substantially perpendicular to the protruding direction of the boss 100. The term "generally vertical" in the present specification includes not only a completely vertical state but also a state of being tilted by about 1 ° from the completely vertical state. At the tip of each boss 100, a female screw 100a is formed from the end face along the boss 100.

A recess 96 for a flow member is formed between the outer peripheral surface of the first base plate 82 on the lower side of the pedestal 90 and the front surface 83f of the second base plate 83 on the upper side of the pedestal 95. The two surfaces are lined up from the first mounting surface 86 side to the second mounting surface 91 side, and the angle formed by the two surfaces is smaller than 180 degrees. The recess 96 for the flow member is connected to these two surfaces. In the present embodiment, as shown in FIG. 6, the shape of the recess 96 for the flow member in the vertical cross section is substantially V-shaped. The shape of the recess 96 for the flow member in the vertical cross section is not particularly limited, and may be, for example, a U shape.

As shown in FIG. 5, a protrusion 97 that protrudes forward is formed on the surface that defines the recess 96 for the flow member. The protrusion 97 protrudes from the first mounting surface 86 in the normal direction of the first mounting surface 86. On the outer peripheral surface on the upper side of the protrusion 97, a contact surface 97s that is substantially perpendicular to the first mounting surface 86 is formed. The contact surface 97s is located below the contact surface 88s of the boss 88 formed on the first base plate 82. In the present embodiment, the recess 96 for the flow member is connected to the outer peripheral surface on the lower side of the pedestal 90 and the front surface 83f of the second base plate 83 on the upper side of the pedestal 95. Therefore, the protrusion 97 crosses the recess 96 for the flow member in the vertical direction. Further, in the present embodiment, two protrusions 97 are formed, and the contact surface 97s is a plane extending to the left and right when the first mounting surface is viewed in a plane, and when the first mounting surface 86 is viewed in a plane. It is not parallel to the vertical direction, which is the extending direction of the first rib 87.

The peripheral wall portion 84 is a tubular body extending in the front-rear direction. As shown in FIG. 4, a part of the front end of the peripheral wall portion 84 is fixed to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. The rear end of the peripheral wall portion 84 is an open end, and an opening 84H is formed. In the present embodiment, the peripheral wall portion 84 includes a pair of side walls 84a and 84a, an upper wall 84b, and a lower wall 84c. The pair of side walls 84a, 84a are plate-shaped bodies extending back and forth and vertically at predetermined intervals. The front outer edges of the pair of side walls 84a, 84a are the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 from the upper outer edge of the first base plate 82 to the lower outer edge of the second base plate 83. Connected to. As shown in FIG. 6, the upper wall 84b is located above the upper outer edge of the first base plate 82, and extends between the upper outer edges of the pair of side walls 84a and 84a in the front-rear and left-right directions. It is a plate-like body. The lower wall 84c is a plate-like body located below the lower outer edge of the second base plate 83, connecting the lower outer edges of the pair of side walls 84a, 84a, and extending in the front-rear and left-right directions. ..

The heat sink 80 is formed with a first vent 98a defined by the inner surface of the upper wall 84b and the upper outer edge of the first base plate 82. The first vent 98a is arranged in front of the connecting portion 99 between the first base plate 82 and the second base plate 83, and closer to the first base plate 82 than the connecting portion 99. Further, the heat sink 80 is formed with a second vent 98b defined by an inner surface of the lower wall 84c and a lower outer edge of the second base plate 83. The second vent 98b is arranged in front of the connecting portion 99 between the first base plate 82 and the second base plate 83, and closer to the second base plate 83 than the connecting portion 99. The first vent 98a and the second vent 98b communicate the internal space and the external space of the peripheral wall portion 84.

The straightening vane 85 is a plate-like body arranged in the internal space of the peripheral wall portion 84 and extending from the front end side to the rear end side of the peripheral wall portion 84. As shown in FIG. 4, in the present embodiment, the straightening vane 85 extends back and forth and vertically, and the upper outer edge of the straightening vane 85 is connected to the inner peripheral surface of the upper wall 84b of the peripheral wall portion 84, and the straightening plate 85 is connected. The lower outer edge of the plate 85 is connected to the inner peripheral surface of the lower wall 84c of the peripheral wall portion 84. As shown in FIG. 6, the outer edge 85f on the front side of the straightening vane 85 is connected to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. The outer edge 85b on the rear side of the straightening vane 85 is located on the front side of the opening 84H. In FIG. 6, the front outer edge 85f and the rear outer edge 85b of the straightening vane 85 are shown by broken lines, respectively. In this embodiment, the heat sink 80 has a plurality of straightening vanes 85. The plurality of straightening vanes 85 cross the first vent 98a when viewed from the front, which is the opening direction of the first vent 98a, and when viewed from the front, which is the opening direction of the second vent 98b, respectively. It crosses the second vent 98b. Further, among the plurality of straightening vanes 85, some straightening vanes 85 have a protruding portion 85a extending forward from the second vent 98b and projecting into the external space of the peripheral wall portion 84.

Next, the fan 81 will be described.

As shown in FIG. 6, the fan 81 is arranged behind the straightening vane 85 in the internal space of the peripheral wall portion 84, and the outer periphery of the fan 81 is surrounded by the peripheral wall portion 84. The fan 81 is fixed to the heat sink 80 by the screw 81a shown in FIG. In the present embodiment, the fan 81 sends air to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. That is, the air flow direction between the back surfaces 82b and 83b and the fan 81 is a direction from the rear to the front. The fan 81 is configured so that the blowing direction can be switched in the opposite direction. That is, the fan 81 can also send air to the opening 84H side instead of the back surface 82b of the first base plate 82 and the back surface 83b side of the second base plate 83 by switching the blowing direction in the opposite direction. By the way, as described above, the first vent 98a and the second vent 98b are located in front of the connecting portion 99 between the first base plate 82 and the second base plate 83, respectively. Therefore, the first vent 98a and the second vent 98b have the first base plate 82 and the second base plate 83 in a cross section perpendicular to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. It is arranged on the side opposite to the fan 81 side from the connection portion 99 with.

Next, the first substrate 50, the second substrate 60, and the flexible printed circuit board 70 will be described.

FIG. 7 is a front view of the first substrate, the second substrate, and the flexible printed circuit board. In FIGS. 3 and 4, the flexible printed circuit board 70 is shown in a curved state, but in FIG. 7, the flexible printed circuit board 70 is in a non-curved state, and the first board 50 and the second board 60 are in a non-curved state. The state of being developed on the same plane is shown.

The first substrate 50 is a plate-like body, and is made of, for example, metal. The first substrate 50 is formed with a through hole 51 penetrating in the plate thickness direction. On the inner peripheral surface of the first substrate 50 that defines the through hole 51, two first contact surfaces 51s that face each other from one surface to the other surface of the first substrate 50 and are substantially parallel to each other are formed. Has been done. That is, the first contact surface 51s is a part of the inner peripheral surface of the first substrate 50 that defines the through hole 51. The first contact surface 51s is substantially perpendicular to the front surface and the back surface of the first substrate 50. Further, the through hole 51 is formed at a position corresponding to the first rib 87 in the first base plate 82 of the heat sink 80, and the distance between the two first contact surfaces 51s is the distance of the first rib 87. It is said to be slightly larger than the outer diameter. For example, the distance between the two first contact surfaces 51s may be increased by about 0.05 mm to 0.1 mm from the outer diameter of the first rib 87.

When the first substrate 50 is viewed in a plan view, the side surface on one side in the direction parallel to the first contact surface 51s is a second contact surface 52s that is substantially perpendicular to the first contact surface 51s. Further, when the first substrate 50 is viewed in a plan view, a positioning recess 53 having an outer edge recessed on the second contact surface 52s side is formed on the outer edge opposite to the second contact surface 52s side. On the side surface of the first substrate 50 that defines the positioning recess 53, a third contact surface 53s that is substantially perpendicular to the first contact surface 51s is formed from one surface of the first substrate 50 to the other surface. There is. The positioning recess 53 is formed at a position corresponding to the boss 88 on the first base plate 82 of the heat sink 80, and two positioning recesses 53 are formed. The distance between the second contact surface 52s and the third contact surface 53s is slightly smaller than the distance between the contact surface 88s of the boss 88 and the contact surface 97s of the protrusion 97 in the heat sink 80. For example, the distance between the second contact surface 52s and the third contact surface 53s is reduced by about 0.05 mm to 0.1 mm from the distance between the contact surface 88s of the boss 88 and the contact surface 97s of the protrusion 97. You may. Further, the first substrate 50 is formed with a notch 54 extending from the outer edge on the second contact surface 52s side to a predetermined position on the side opposite to the second contact surface 52s side. In this embodiment, two notches 54 are formed.

A first light emitting element 55 and a thermistor 56 are mounted on one surface of the first substrate 50. When the first substrate 50 is viewed in a plan view, the first light emitting element 55 is located on the second contact surface 52s side, and the thermistor 56 is located on the side opposite to the second contact surface 52s side. In the present embodiment, the center of gravity 50G of the first substrate 50 is located between the first light emitting element 55 and the thermistor 56. The first light emitting element 55 emits the first light which becomes a low beam. Examples of the first light emitting element 55 include an LED. In the present embodiment, the first light emitting element 55 is an LED array composed of a plurality of LEDs arranged in parallel in a direction substantially perpendicular to the first contact surface 51s when the first substrate 50 is viewed in a plan view. The LED array is connected in series by a power feeding circuit 57 formed on the first substrate 50. The thermistor 56 is connected to a thermistor circuit 58 formed on the first substrate 50. The first light emitting element 55, the thermistor 56, the power feeding circuit 57, and the thermistor circuit 58 are each insulated from the first substrate 50 by an insulating layer (not shown) provided on the surface of the first substrate 50.

The second substrate 60 is a plate-like body, and is made of, for example, metal. The second substrate 60 is formed with a through hole 61 penetrating in the plate thickness direction. On the inner peripheral surface of the second substrate 60 that defines the through hole 61, two first contact surfaces 61s that face each other from one surface to the other surface of the second substrate 60 and are substantially parallel to each other are formed. Has been done. That is, the first contact surface 61s is a part of the inner peripheral surface of the second substrate 60 that defines the through hole 61. The first contact surface 61s is substantially perpendicular to the front and back surfaces of the second substrate 60. Further, the through hole 61 is formed at a position corresponding to the second rib 92 in the second base plate 83 of the heat sink 80, and the distance between the two first contact surfaces 61s is the second rib 92. It is slightly larger than the outer diameter. For example, the distance between the two first contact surfaces 61s may be increased by about 0.05 mm to 0.1 mm from the outer diameter of the second rib 92.

When the second substrate 60 is viewed in a plan view, a positioning recess 62 is formed in which the outer edge of the second substrate 60 is recessed in a direction substantially perpendicular to the first contact surface 61s. On the side surface of the second substrate 60 that defines the positioning recess 62, two second contact surfaces 62s that face each other from one surface to the other surface of the second substrate 60 and are substantially perpendicular to the first contact surface 61s. Is formed. The positioning recess 62 is formed at a position corresponding to a protrusion 94 on the second base plate 83 of the heat sink 80, and two positioning recesses 62 are formed on the second base plate 83. The distance between the two second contact surfaces 62s in each positioning recess 62 is slightly larger than the distance between the two contact surfaces 94s in the protrusion 94. For example, the distance between the two second contact surfaces 62s may be increased by about 0.05 mm to 0.1 mm from the distance between the two contact surfaces 94s on the protrusion 94.

A second light emitting element 63 and a connector 64 are mounted on one surface of the second substrate 60. When the second substrate 60 is viewed in a plan view, the second light emitting element 63 is located on one side in the direction parallel to the first contact surface 61s, and the connector 64 is located on the other side. In the present embodiment, the center of gravity 60G of the second substrate 60 is located between the second light emitting element 63 and the connector 64. The second light emitting element 63 and the connector 64 are electrically connected by a power feeding circuit 65 formed on the second substrate 60. The second light emitting element 63 emits a second light that becomes a high beam. Examples of the second light emitting element 63 include an LED. In the present embodiment, the second light emitting element 63 is an LED array composed of a plurality of LEDs arranged in parallel in a direction substantially perpendicular to the first contact surface 61s when the second substrate 60 is viewed in a plan view. In this LED array, two adjacent LEDs are connected in parallel by a power feeding circuit 65, and light may be emitted or light may be emitted from each of the two LEDs connected in parallel.

Further, on the second substrate 60, a first power supply wiring 66a, a second power supply wiring 66b, a first thermistor wiring 67a, and a second thermistor wiring 67b, one end of which is connected to the connector 64, are formed. ing. In the present embodiment, the wiring 67a for the first thermistor is located on one side of the feeding circuit 65 in a direction substantially perpendicular to the first contact surface 61s when the second substrate 60 is viewed in a plan view. The first power supply wiring 66a is located between the power supply circuit 65 and the first thermistor wiring 67a in a direction substantially perpendicular to the first contact surface 61s when the second substrate 60 is viewed in a plan view. The wiring 67b for the second thermistor is located on the other side of the power feeding circuit 65 in a direction substantially perpendicular to the first contact surface 61s when the second substrate 60 is viewed in a plan view. The second power feeding wiring 66b is located between the power feeding circuit 65 and the second thermistor wiring 67b in a direction substantially perpendicular to the first contact surface 61s when the second substrate 60 is viewed in a plan view. A wire harness (not shown) is connected to the connector 64. The number of connectors 64 is not particularly limited, and FIG. 7 illustrates a mode in which two connectors 64 are mounted in parallel in a direction substantially perpendicular to the first contact surface 61s. The second light emitting element 63, the power supply circuit 65, the first power supply wiring 66a, the second power supply wiring 66b, the first thermistor wiring 67a, and the second thermistor wiring 67b are provided on the surface of the second substrate 60. It is insulated from the second substrate 60 by an insulating layer (not shown).

In the present embodiment, the two flexible printed circuit boards 70 have a substantially symmetrical configuration. In the following, one will be described, and the description of the other will be omitted as appropriate. The flexible printed circuit board 70 has flexibility, and is composed of, for example, an insulating sheet and a metal film provided on one surface of the insulating sheet. The flexible printed circuit board 70 of the present embodiment is connected to a substantially rectangular band portion 73, a first connecting portion 71 connected to one end of the band portion 73 in the longitudinal direction, and the other end of the band portion 73 in the longitudinal direction. It has a second connecting portion 72. The width of the band portion 73 in the direction perpendicular to the longitudinal direction is smaller than the width of the first connecting portion 71 and the second connecting portion 72 in the direction. In the present embodiment, the band portion 73 is formed with slits 73s substantially parallel to the longitudinal direction of the band portion 73. Due to the slits 73s, the bending rigidity of the band portion 73 is lower than that in the case where the slits 73s are not formed. In particular, the rigidity of the band portion 73 in the direction perpendicular to the longitudinal direction is reduced. The widths of the first connecting portion 71, the second connecting portion 72, and the band portion 73 are not particularly limited. For example, the width of the band portion 73 may be larger than the width of the first connecting portion 71 and the second connecting portion 72. Further, the width of the band portion 73 may change in the longitudinal direction of the band portion 73. Further, the slit 73s may not be formed in the band portion 73.

The first connection portion 71 is formed with a first power supply terminal 74a and a first thermistor terminal 75a, and the second connection portion 72 is formed with a second power supply terminal 74b and a second thermistor terminal 75b. .. Further, the flexible printed circuit board 70 is formed with a power supply wiring 74c that electrically connects the first power supply terminal 74a and the second power supply terminal 74b through the band portion 73. Further, a thermistor wiring 75c that electrically connects the first thermistor terminal 75a and the second thermistor terminal 75b is also formed through the band portion 73 like the power feeding wiring 74c. The power supply wiring 74c passes through one side of the band portion 73 in a direction perpendicular to the longitudinal direction with respect to the slit 73s of the band portion 73. On the other hand, the thermistor wiring 75c passes through the other side in the direction perpendicular to the longitudinal direction of the band portion 73 with reference to the slit 73s of the band portion 73. That is, the flexible printed circuit board 70 has two wirings 74c and 75c extending from the first connection portion 71 to the second connection portion 72, and slits 73s are formed between the two wirings 74c and 75c.

Each such flexible printed circuit board 70 connects the first board 50 and the second board 60, and electrically connects the circuit formed on the first board 50 and the circuit formed on the second board 60. Connect to. Specifically, the first connection portion 71 of each flexible printed circuit board 70 is joined to the mounting surface on which the first light emitting element 55 of the first substrate 50 is mounted, for example, by soldering. The second connection portion 72 of each flexible printed circuit board 70 is joined to the mounting surface on which the second light emitting element 63 of the second substrate 60 is mounted, for example, by soldering. In this way, each flexible printed circuit board 70 is connected to the first board 50 and the second board 60. The longitudinal direction of the strip 73 on each flexible printed circuit board 70 is substantially parallel to each other. In the present embodiment, in a state where the first substrate 50 and the second substrate 60 are arranged on the same plane, the first contact surface 51s of the first substrate 50 and the first contact surface 61s of the second substrate 60 Are generally parallel. Further, the first light emitting element 55 side of the first substrate 50 is located on the second light emitting element 63 side of the second substrate 60.

The first connection portion 71 of each flexible printed circuit board 70 is located at substantially the same position as the first contact surface 51s in a direction parallel to the first contact surface 51s when the first board 50 is viewed in a plan view. The second connection portion 72 of each flexible printed circuit board 70 is located at substantially the same position as each other in the direction parallel to the first contact surface 61s when the second board 60 is viewed in a plan view. The center of gravity 50G of the first substrate 50 and the first light emitting element 55 are located between the first connection portions 71 of the flexible printed circuit board 70. The first connection portion 71 of each flexible printed circuit board 70 is located on the side opposite to the first light emitting element 55 side with respect to the center of gravity 50G of the first board 50. The center of gravity 60G of the second substrate 60 and the second light emitting element 63 are located between the second connecting portions 72 of the flexible printed circuit board 70. The center of gravity 50G of the first substrate 50 and the first light emitting element 55 do not have to be located between the first connection portions 71, respectively. Further, the center of gravity 60G of the second substrate 60 and the second light emitting element 63 do not have to be located between the second connecting portions 72, respectively. A part of the band portion 73 of each flexible printed circuit board 70 overlaps with the notch 54 of the first substrate 50 when viewed from the side opposite to the first substrate 50 side of the flexible printed circuit board 70. The width of the notch 54 is made larger than the width of the band portion 73. Further, from the same viewpoint, the band portion 73 of each flexible printed circuit board 70 does not overlap with the first board 50 from the outer edge of the second board 60 that the band portion 73 crosses to a predetermined position in the notch 54. .. The band portion 73 of the flexible printed circuit board 70 of the present embodiment is on the side opposite to the second board 60 side of the outer edge defining the notch 54 of the first board 50 from the outer edge of the second board 60 that the band portion 73 crosses. It does not overlap with the first substrate 50 up to the outer edge. Further, the first light emitting element 55 of the first substrate 50 is arranged on the second substrate 60 side of the notch 54 on the side opposite to the second substrate side when the first substrate 50 is viewed in a plan view. Then, the first light emitting element 55 overlaps the portion of the band portion 73 that does not overlap with the first substrate 50 in the direction perpendicular to the longitudinal direction of the band portion 73.

Further, the cathode-side end 57c of the power feeding circuit 57 formed on the first board 50 is connected to the first power feeding terminal 74a of one of the flexible printed circuit boards 70. The anode-side end 57a of the power supply circuit 57 of the first board 50 is connected to the first power supply terminal 74a of the other flexible printed circuit board 70. Further, a terminal 58c on the cathode side of the thermistor circuit 58 formed on the first substrate 50 is connected to the terminal 75a for the first thermistor of one of the flexible printed circuit boards 70. The anode-side end 58a of the thermistor circuit 58 formed on the first substrate 50 is connected to the first thermistor terminal 75a of the other flexible printed circuit board 70.

The second power supply terminal 74b of the flexible printed circuit board 70 is connected to the end of the first power supply wiring 66a of the second board 60 opposite to the connector 64 side. The end of the second power supply wiring 66b of the second board 60 opposite to the connector 64 side is connected to the second power supply terminal 74b of the other flexible printed circuit board 70. Further, the end of the first thermistor wiring 67a of the second board 60 opposite to the connector 64 side is connected to the second thermistor terminal 75b of one of the flexible printed circuit boards 70. The end of the second thermistor wiring 67b of the second board 60 opposite to the connector 64 side is connected to the second thermistor terminal 75b of the other flexible printed circuit board 70.

By connecting the two flexible printed circuit boards 70 to the first board 50 and the second board 60 in this way, the connector 64 of the second board 60 and the power supply circuit 65 of the first board 50 are electrically connected. To. Then, electric power is supplied to the first light emitting element 55 of the first substrate 50 via the connector 64. Further, the connector 64 of the second substrate 60 and the thermistor circuit 58 of the first substrate 50 are electrically connected, and a current is applied to the thermistor 56 of the first substrate 50.

Next, mounting of the first substrate 50 on the heat sink 80 will be described.

FIG. 8 is a diagram showing a state in which the first substrate is mounted on the heat sink. As shown in FIG. 8, in the first substrate 50, the first base plate 82 of the heat sink 80 is in a state where the first contact surface 51s is substantially parallel to the vertical direction and the first light emitting element 55 side is located on the lower side. 1 It is mounted on the mounting surface 86. When the first substrate is viewed in a plan view, the outer edge of the first mounting surface 86 is surrounded by the outer edge of the first substrate 50. In the present embodiment, since grease as a flow member described later is applied to the surface of the first substrate 50 opposite to the side on which the first light emitting element 55 is mounted, the first light emitting element of the first substrate 50 This grease is interposed between the surface on the side opposite to the side on which the 55 is mounted and the first mounting surface 86. The first rib 87 of the first base plate 82 is inserted into the through hole 51 of the first substrate 50. As described above, the first rib 87 is inclined upward with respect to the first mounting surface 86 and extends from the lower side to the upper side when the first mounting surface 86 is viewed in a plan view. 87 is inserted in a state of being inclined upward with respect to the opening direction of the through hole 51. The center of the first rib 87 inserted into the through hole 51 in this way is located between the two first contact surfaces 51s when viewed from the front, which is the extending direction of the first rib 87. As described above, the distance between the two first contact surfaces 51s is slightly larger than the outer diameter of the first rib 87. Therefore, when the first substrate 50 moves in the direction perpendicular to the first contact surface 51s along the first mounting surface 86 with respect to the heat sink 80, either of the two first contact surfaces 51s. The outer peripheral surface of the first rib 87 comes into contact with one side. Here, when the first mounting surface 86 is viewed in a plane as described above, the first rib 87 extends from the lower side to the upper side, and the first contact surface 51s is substantially parallel to the vertical direction. ing. Therefore, when the first mounting surface 86 is viewed in a plan view, the outer peripheral surface on one side and the outer peripheral surface on the other side of the first rib 87 in the left-right direction which is the direction perpendicular to the extending direction of the first rib 87. It can be understood that at least one of them comes into contact with the first contact surface 51s. Therefore, among the positions of the first substrate 50 with respect to the heat sink 80 in the direction parallel to the first mounting surface 86, in the direction perpendicular to the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plan view. The position is regulated to be within a predetermined range. At least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the first rib 87 in the direction perpendicular to the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plan view is the first. 1 It may be in constant contact with the contact surface 51s. For example, the first rib 87 may be press-fitted into the through hole 51.

The two bosses 88 of the first base plate 82 are respectively inserted into the two positioning recesses 53 of the first substrate 50. As described above, the contact surface 88s of the boss 88 is a plane that is perpendicular to the first mounting surface 86 and extends to the left and right when the first mounting surface 86 is viewed in a plane. Further, the third contact surface 53s on the side surface of the first substrate 50 that defines the positioning recess 53 is substantially perpendicular to the first contact surface 51s that is substantially parallel to the vertical direction. Therefore, the contact surface 88s and the third contact surface 53s face each other in a substantially parallel state.

The second contact surface 52s of the first substrate 50 is located above the protrusion 97 of the heat sink 80. As described above, the contact surface 97s of the protrusion 97 is a plane that is substantially perpendicular to the first mounting surface 86 and extends to the left and right when the first mounting surface 86 is viewed in a plane. Further, the second contact surface 52s of the first substrate 50 is substantially perpendicular to the first contact surface 51s which is substantially parallel to the vertical direction. Therefore, the contact surface 97s and the second contact surface 52s face each other in a substantially parallel state. As described above, the distance between the second contact surface 52s and the third contact surface 53s on the first substrate 50 is based on the distance between the contact surface 88s of the boss 88 and the contact surface 97s of the protrusion 97 on the heat sink 80. Is also slightly smaller. Therefore, when the first substrate 50 moves with respect to the heat sink 80 along the first mounting surface 86 in a direction parallel to the first contact surface 51s, the second contact surface 52s on the first substrate 50 And the contact surface 97s of the protrusion 97 come into contact with each other. Further, the third contact surface 53s of the first substrate 50 and the contact surface 88s of the boss 88 come into contact with each other. Here, as described above, the contact surface 88s is a flat surface extending to the left and right when the first mounting surface 86 is viewed in a plane, and the contact surface 88s and the third contact surface 53s face each other in a substantially parallel state. ing. Therefore, when the first mounting surface 86 is viewed in a plan view, the tangent line when the contact surface 88s and the third contact surface 53s come into contact with each other extends substantially to the left and right. Therefore, this tangent line is substantially perpendicular to and non-parallel to the extending direction of the first rib 87. Further, as described above, the contact surface 97s is a flat surface extending to the left and right when the first mounting surface 86 is viewed in a plane, and the contact surface 97s and the second contact surface 52s face each other in a substantially parallel state. There is. Therefore, when the first mounting surface 86 is viewed in a plan view, the tangent line when the contact surface 97s and the second contact surface 52s come into contact with each other extends substantially to the left and right. Therefore, this tangent line is substantially perpendicular to and non-parallel to the extending direction of the first rib 87. Therefore, among the positions of the first substrate 50 with respect to the heat sink 80 in the direction parallel to the first mounting surface 86, in the vertical direction which is the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plan view. The position is regulated to be within a predetermined range. The first mounting surface 86 is in at least one state in which the contact surface 88s and the third contact surface 53s are in contact with each other and the contact surface 97s and the second contact surface 52s are in contact with each other. The first rib 87 is not in contact with the first substrate 50 in the extending direction of the first rib 87 when viewed in a plan view. The second contact surface 52s on the first substrate 50 and the contact surface 97s of the protrusion 97 may always be in contact with each other, and the third contact surface 53s on the first substrate 50 and the contact surface 88s of the boss 88. May always be in contact with.

By the way, since the first base plate 82 extends diagonally upward in the front as described above, the first mounting surface 86 also extends diagonally upward in the front, and the first mounting surface 86 is mounted on the first mounting surface 86. The substrate 50 also extends diagonally upward and forward. Further, as shown in FIG. 8, a part of the first substrate 50 overlaps with the first vent 98a when viewed from the front, which is the opening direction of the first vent 98a. Further, as described above, the first substrate 50 is placed on the first mounting surface 86 of the heat sink 80 in a state where the first contact surface 51s is substantially parallel to the vertical direction. The first light emitting element 55 is an LED array composed of a plurality of LEDs arranged in parallel in a direction substantially perpendicular to the first contact surface 51s. Therefore, the LED arrays as the first light emitting element 55 are arranged in parallel in the left-right direction.

Next, mounting of the second substrate 60 on the heat sink 80 will be described.

FIG. 9 is a diagram showing a state in which the first substrate and the second substrate are mounted on the heat sink. As shown in FIG. 9, in the second substrate 60, the second base plate 83 of the heat sink 80 is in a state where the first contact surface 61s is substantially parallel to the vertical direction and the second light emitting element 63 side is located on the upper side. 2 It is placed on the mounting surface 91. When the second substrate 60 is viewed in a plan view, the outer edge of the second mounting surface 91 is surrounded by the outer edge of the second substrate 60. In FIG. 9, the first substrate 50 side of the second substrate 60 and the second substrate 60 side of the first substrate 50 overlap each other, but the second substrate 60 and the first substrate 50 are separated from each other. That is, the first substrate 50 and the second substrate 60 are placed on the heat sink 80 at a predetermined interval.

In the present embodiment, the surface of the second substrate 60 opposite to the side on which the second light emitting element 63 is mounted is coated with grease as a flow member described later in the same manner as the first substrate 50. This grease is interposed between the surface of the two substrates 60 opposite to the side on which the second light emitting element 63 is mounted and the second mounting surface 91. The second rib 92 of the second base plate 83 is inserted into the through hole 61 of the second substrate 60. As described above, the second rib 92 is inclined downward with respect to the second mounting surface 91 and extends from the upper side to the lower side when the second mounting surface 91 is viewed in a plan view. The 92 is inserted in a state of being inclined downward with respect to the opening direction of the through hole 61. The center of the second rib 92 inserted into the through hole 61 in this way is located between the two first contact surfaces 61s when viewed from the front, which is the extending direction of the second rib 92. As described above, the distance between the two first contact surfaces 61s is slightly larger than the outer diameter of the second rib 92. Therefore, when the second substrate 60 moves in the direction perpendicular to the first contact surface 61s along the second mounting surface 91 with respect to the heat sink 80, either of the two first contact surfaces 61s. The outer peripheral surface of the second rib 92 comes into contact with one side. Here, when the second mounting surface 91 is viewed in a plane as described above, the second rib 92 extends from the upper side to the lower side, and the first contact surface 61s is substantially parallel to the vertical direction. ing. Therefore, when the second mounting surface 91 is viewed in a plan view, the outer peripheral surface on one side and the outer peripheral surface on the other side of the second rib 92 in the left-right direction which is the direction perpendicular to the extending direction of the second rib 92. It can be understood that at least one of them comes into contact with the first contact surface 61s. Therefore, among the positions of the second substrate 60 with respect to the heat sink 80 in the direction parallel to the second mounting surface 91, in the direction perpendicular to the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plan view. The position is regulated to be within a predetermined range. When the second mounting surface 91 is viewed in a plan view, at least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the second rib 92 in the direction perpendicular to the extending direction of the second rib 92 is the first. 1 It may be in constant contact with the contact surface 61s. For example, the second rib 92 may be press-fitted into the through hole 61.

The two protrusions 94 of the second base plate 83 are respectively inserted into the two positioning recesses 62 of the second substrate 60. The contact surfaces 94s formed on the upper and lower outer peripheral surfaces of the protrusions 94 as described above are substantially perpendicular to the second mounting surface 91, respectively, and are left and right when the second mounting surface 91 is viewed in a plan view. It is said to be an extending plane. Further, the two opposing second contact surfaces 62s on the side surface of the second substrate 60 defining the positioning recess 62 are substantially perpendicular to the first contact surface 61s which is substantially parallel to the vertical direction. There is. Therefore, the contact surface 94s and the second contact surface 62s face each other in a substantially parallel state. As described above, the distance between the two second contact surfaces 62s in each positioning recess 62 is slightly larger than the distance between the two contact surfaces 94s in the protrusion 94. Therefore, when the second substrate 60 moves in a direction parallel to the first contact surface 61s along the second mounting surface 91 with respect to the heat sink 80, it becomes the contact surface 94s of either one facing the heat sink 80. It comes into contact with the first contact surface 61s. Here, as described above, the contact surface 94s is a flat surface extending to the left and right when the second mounting surface 91 is viewed in a plane, and the contact surface 94s and the second contact surface 62s face each other in a substantially parallel state. There is. Therefore, when the second mounting surface 91 is viewed in a plan view, the tangent line when the contact surface 94s and the second contact surface 62s come into contact with each other extends substantially to the left and right. Therefore, this tangent line is substantially perpendicular and non-parallel to the extending direction of the second rib 92. Therefore, among the positions of the second substrate 60 with respect to the heat sink 80 in the direction parallel to the second mounting surface 91, the position in the direction parallel to the first contact surface 61s is regulated to be within a predetermined range. .. In the state where the contact surface 94s and the second contact surface 62s are in contact with each other, the second rib 92 is the second substrate in the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plan view. It is considered to be non-contact with 60.

By the way, since the second base plate 83 extends diagonally downward in the front as described above, the second mounting surface 91 also extends diagonally upward in the front and is mounted on the second mounting surface 91. The substrate 60 also extends diagonally forward and downward. Further, as shown in FIG. 9, the second substrate 60 overlaps with the second vent 98b when viewed from the front, which is the opening direction of the second vent 98b. Further, as described above, the second substrate 60 is placed on the second mounting surface 91 of the heat sink 80 in a state where the first contact surface 61s is substantially parallel to the vertical direction. The second light emitting element 63 is an LED array that is parallel to the first contact surface 61s in a direction substantially perpendicular to the first contact surface 61s. Therefore, the LED arrays as the second light emitting element 63 are arranged in parallel in the left-right direction. Further, as described above, since the first light emitting element 55 side of the first substrate 50 is located on the second light emitting element 63 side of the second substrate 60, the second light emitting element 63 is the second light emitting element 63 of the second substrate 60. It is located on the first substrate 50 side rather than the substrate 60 side. Further, the first light emitting element 55 is located on the second substrate 60 side of the first substrate 50 with respect to the first substrate 50 side.

Further, when viewed from the side opposite to the heat sink 80 side of the flexible printed circuit board 70, each band 73 of the two flexible printed circuit boards 70 is inside the notch 54 from the outer edge of the second board 60 crossed by the band 73. Does not overlap with the first substrate 50 up to a predetermined position in. Further, from the same viewpoint, the first light emitting element 55 of the first substrate 50 overlaps the portion of the band portion 73 that does not overlap with the first substrate 50 in the direction perpendicular to the longitudinal direction of the band portion 73. There is. Further, from the same viewpoint, one recess 89 of the heat sink 80 crosses both side edges of the flexible printed circuit board 70 in a direction perpendicular to the longitudinal direction of the one flexible printed circuit board 70. Further, the other recess 89 crosses both side edges of the flexible printed circuit board 70 in a direction perpendicular to the longitudinal direction of the other flexible printed circuit board 70.

FIG. 10 is a view showing a state in which the second substrate is placed on the heat sink, and is a partially enlarged view of the second substrate and the heat sink viewed from the side. As described above, among the plurality of straightening vanes 85, some straightening vanes 85 have a protruding portion 85a extending forward from the second vent 98b and projecting into the external space of the peripheral wall portion 84. As shown in FIG. 10, the protruding portion 85a comes into contact with the surface of the second substrate 60 opposite to the side on which the second light emitting element 63 is mounted. That is, the second substrate 60 is mounted on the protruding portion 85a together with the second mounting surface 91 on the second base plate 83.

Next, the state of the flexible printed circuit board 70 in a state where the first board 50 and the second board 60 are mounted on the heat sink 80 will be described.

In the present embodiment, the two flexible printed circuit boards 70 are in substantially the same state when the first board 50 and the second board 60 are placed on the heat sink 80. Therefore, in the following, one will be described and the other will be omitted. FIG. 11 is a schematic cross-sectional view passing through the flexible printed circuit board in FIG. 9, and is a schematic cross-sectional view parallel to the longitudinal direction of the band portion 73 of the flexible printed circuit board 70. As described above, the first connecting portion 71 is joined on the mounting surface 50s on which the first light emitting element 55 of the first substrate 50 is mounted, and the second connecting portion 72 is formed by the second light emitting element 63 of the second substrate 60. It is joined on the mounting surface 60s to be mounted. Therefore, the first connecting portion 71 is connected to the side opposite to the first mounting surface 86 side of the first substrate 50, and the second connecting portion 72 is connected to the side opposite to the second mounting surface 91 side of the second substrate 60. It is connected. Further, as shown in FIG. 11, the band portion 73 of the flexible printed circuit board 70 is a heat sink between the first substrate 50 and the second substrate 60 on the first substrate 50 side of the first connection portion 71. It bends convexly toward the 80 side. In the present embodiment, the band portion 73 of the flexible printed circuit board 70 passes through the region on the first mounting surface 86 side of the first connection portion 71, and also passes through the notch 54 in the first substrate 50. Further, the recess 89 in the heat sink 80 is recessed in an arc shape in the vertical cross section, and is recessed on the side opposite to the flexible printed circuit board 70 side of the first mounting surface 86. The band portion 73 of the flexible printed circuit board 70 also passes through the recess 89. The flexible printed circuit board 70 that bends in this way is not in contact with the heat sink 80. By the way, for example, due to dimensional errors in the first substrate 50, the second substrate 60, the heat sink 80, etc., the first substrate 50 and the second substrate 60 are displaced in the left-right direction, which is the direction perpendicular to the longitudinal direction in the band portion 73. Left-right stress may be generated in the portion 73. However, as described above, by forming the slit 73s in the band portion 73, the rigidity of the band portion 73 in the direction perpendicular to the longitudinal direction is reduced as compared with the case where the slit 73s is not formed. Therefore, even if the band portion 73 is stressed in the left-right direction, the stress acting on the first connecting portion and the second connecting portion can be reduced as compared with the case where the slits 73s are not formed, and a problem occurs. Can be suppressed.

Next, the reflector unit 40 will be described.

12 is a perspective view of the light source unit, FIG. 13 is a front view of the light source unit, and FIG. 14 is a schematic cross-sectional view of the light source unit. As shown in FIGS. 12 and 13, the reflector unit 40 includes a reflector 41 for the first light emitting element 55, a first side reflector 41a for the first light emitting element 55, and a second side reflector 41b for the first light emitting element 55. The main configuration includes a reflector 42 for the second light emitting element 63, a first side reflector 42a for the second light emitting element 63, a second side reflector 42b for the second light emitting element 63, and a shade 43.

The reflector unit 40 is arranged on the side opposite to the heat sink 80 side of the first substrate 50. The reflector unit 40 is fixed to the heat sink 80 so as to sandwich the first substrate 50 between the reflector unit 40 and the heat sink 80. In this embodiment, two screws 46 are used to fix the reflector unit 40 to the heat sink 80.

The reflector unit 40 also has ribs 44, as shown in FIG. The rib 44 extends toward the first substrate 50, and a part of the end of the rib 44 on the first substrate 50 side contacts the mounting surface 50s on which the first light emitting element 55 of the first substrate 50 is mounted. To do. Therefore, the first substrate 50 is pressed against the first mounting surface 86 of the heat sink 80 by the reflector unit 40 and fixed to the heat sink 80. In the present embodiment, the reflector unit 40 has a plurality of ribs 44, and when the first substrate 50 is viewed in a plan view, the contact portion of the rib 44 with the first substrate 50 overlaps with the first mounting surface 86. .. Therefore, the first substrate 50 can be pressed more appropriately against the first mounting surface 86, and the relative position of the first substrate 50 with respect to the heat sink 80 is suppressed from being changed by vibration or the like.

By the way, in the present embodiment, as described above, grease as a flow member is applied to the surface of the first substrate 50 opposite to the side on which the first light emitting element 55 is mounted, as shown in FIG. , Grease 24 is interposed between the first substrate 50 and the first mounting surface 86. Therefore, when the first substrate 50 is pressed against the first mounting surface 86, a part of the grease 24 may be pushed out from between the first substrate 50 and the first mounting surface 86. As described above, the first mounting surface 86 is the end surface of the pedestal 90 protruding forward from the front surface 82f of the first base plate 82, and the outer edge of the first mounting surface 86 is surrounded by the outer edge of the first substrate 50. ing. Therefore, the excess grease 24 extruded from between the first substrate 50 and the first mounting surface 86 is extruded onto the front surface 82f of the first base plate 82 around the pedestal 90. Therefore, it is suppressed that a part of the excess grease 24 adheres to the mounting surface 50s on which the first light emitting element 55 of the first substrate 50 is mounted, and the excess grease 24 adheres to the first light emitting element 55, etc. Is suppressed.

As shown in FIG. 14, the shade 43 is arranged between the first light emitting element 55 and the second light emitting element 63, and shields a part of the first light emitted from the first light emitting element 55. Further, the shade 43 has a first reflecting surface 43a on the upper surface and a second reflecting surface 43b on the lower surface. The first reflecting surface 43a is a concave reflecting surface extending forward from the first light emitting element 55 side and reflecting a part of the first light forward. The second reflecting surface 43b is a concave reflecting surface that extends forward from the second light emitting element 63 side and reflects a part of the second light emitted from the second light emitting element 63 forward. Further, the front end 43c of the shade 43 has a shape that matches the cut line described later, and is gradually recessed rearward from the left and right ends toward the center.

The reflector 41 is arranged above the first light emitting element 55, and has a third reflecting surface 41r that covers the upper part of the first light emitting element 55 on the first light emitting element 55 side. The third reflecting surface 41r and the first reflecting surface 43a of the shade 43 extend in the left-right direction, and form a pair of reflectors arranged so as to sandwich the first light emitting element 55 from the upper and lower sides.

As shown in FIGS. 12 and 13, the first side reflector 41a is the first light emitting element 55 in the left-right direction in the space sandwiched between the first reflecting surface 43a of the shade 43 and the third reflecting surface 41r of the reflector 41. Formed on one side of the. Further, the second side reflector 41b is formed in the space on the other side of the first light emitting element 55. The first side reflector 41a and the second side reflector 41b are formed so that the distance between them increases from the rear to the front.

As shown in FIG. 14, the reflector 42 is arranged below the second light emitting element 63, and has a fourth reflecting surface 42r that covers the lower side of the second light emitting element 63 on the second light emitting element 63 side. The fourth reflecting surface 42r and the second reflecting surface 43b of the shade 43 extend in the left-right direction, and form a pair of reflectors arranged so as to sandwich the second light emitting element 63 from the upper and lower sides.

As shown in FIGS. 12 and 13, the first side reflector 42a is the second light emitting element 63 in the left-right direction in the space sandwiched between the second reflecting surface 43b of the shade 43 and the fourth reflecting surface 42r of the reflector 42. Formed on one side of the. Further, the second side reflector 42b is formed on the other side of the space from the second light emitting element 63. The first side reflector 42a and the second side reflector 42b are formed so that the distance between them increases from the rear to the front.

Next, the support plate 30 will be described.

FIG. 15 is a perspective view of the support plate viewed from the front side, and FIG. 16 is a perspective view of the support plate viewed from the rear side. The support plate 30 has elasticity, and as shown in FIGS. 15 and 16, the base portion 31, the pair of fixing portions 32, the pair of first light-shielding portions 33, the second light-shielding portion 34, and the third light-shielding portion 35, have. In the present embodiment, the base portion 31, the pair of fixing portions 32, the pair of first light-shielding portions 33, the second light-shielding portion 34, and the third light-shielding portion 35 are integrally formed by bending a metal plate. There is. As shown in FIGS. 12 and 13, such a support plate 30 is fixed to the heat sink 80 so as to cover a part of the second substrate 60 from the mounting surface 60s side on which the second light emitting element 63 is mounted.

The base portion 31 is arranged on the side opposite to the heat sink 80 side of the second substrate 60, and extends along the second substrate 60 between the connector 64 and the second light emitting element 63. The base portion 31 has a convex portion 31a that protrudes toward the second substrate 60 and contacts the surface of the second substrate 60 that is opposite to the second mounting surface 91 side. That is, the convex portion 31a comes into contact with the mounting surface 60s on which the second light emitting element 63 is mounted on the second substrate 60. In the present embodiment, the base portion 31 has two convex portions 31a. FIG. 17 is a view showing a state in which the second substrate in FIG. 9 is viewed in a plan view, and is an enlarged view of the vicinity of the positioning recess 62. As shown in FIGS. 7, 9, and 17, the contact portions 31b that come into contact with the two convex portions 31a on the mounting surface 60s on which the second light emitting element 63 of the second substrate 60 is mounted are the second substrates, respectively. It is located on the side opposite to the second light emitting element 63 side from the positioning recess 62 of 60. The number and position of the convex portions 31a on the support plate 30 are not particularly limited. In other words, the number and position of the contact portions 31b in contact with the convex portions 31a on the second substrate 60 are not particularly limited.

As shown in FIGS. 15 and 16, one of the pair of fixing portions 32 is connected to the outer edge portion of the base portion 31 in the left-right direction. The other fixing portion 32 is connected to the other outer edge portion in the left-right direction of the base portion 31. As shown in FIGS. 12 and 13, the pair of fixing portions 32 are fixed to each of the two bosses 100 in the heat sink 80 by screws 101.

The pair of fixing portions 32 have a substantially symmetrical structure, and have an inner side wall portion 32a, an outer wall portion 32b, and a front wall portion 32c. The inner side wall portion 32a extends in a direction substantially orthogonal to the base portion 31 on the side opposite to the second substrate 60 side of the base portion 31, and is connected to the base portion 31. The front wall portion 32c is located in front of the inner side wall portion 32a and on the side opposite to the base portion 31 side of the inner side wall portion 32a. The front wall portion 32c is substantially orthogonal to the inner side wall portion 32a and extends in a substantially vertical direction, and is connected to the inner side wall portion 32a. The outer side wall portion 32b extends substantially parallel to the inner side wall portion 32a behind the front wall portion 32c and is connected to the front wall portion 32c. The front wall portion 32c extends substantially in the vertical direction, and a through hole penetrating the front wall portion 32c in the plate thickness direction is formed. Since the second substrate 60 extends diagonally forward and downward as described above, the base portion 31 along the second substrate 60 also extends diagonally downward and forward. Therefore, the front wall portion 32c of the fixing portion 32 is not parallel to the base portion 31. The boss 100 of the heat sink 80 is arranged in the space surrounded by the inner side wall portion 32a, the outer wall portion 32b, and the front wall portion 32c of the fixing portion 32, and the fixing portion 32 is fixed to the heat sink 80 by the screws 101. To.

The second light-shielding portion 34 is connected to the outer edge portion of the base portion 31 on the connector 64 side. The second light-shielding portion 34 has an upper wall portion 34a and a pair of connecting wall portions 34b. The upper wall portion 34a is arranged above the connector 64 and extends substantially parallel to the base portion 31. One connection wall portion 34b is connected to one side in the left-right direction of the outer edge portion of the base portion 31 on the connector 64 side, and extends to the side opposite to the second substrate 60 side. The outer edge portion of the one connection wall portion 34b opposite to the base portion 31 side is connected to the outer edge portion of the upper wall portion 34a on the second light emitting element 63 side. The other connection wall portion 34b is connected to the other side in the left-right direction of the outer edge portion of the base portion 31 on the connector 64 side, and extends to the side opposite to the second substrate 60 side. The outer edge portion of the other connection wall portion 34b opposite to the base portion 31 side is connected to the outer edge portion of the upper wall portion 34a on the second light emitting element 63 side. A part of the connector 64 on the side opposite to the second substrate 60 side is covered by the second light-shielding portion 34.

The third light-shielding portion 35 is connected to the first side reflector 41a side for the first light-emitting element 55 in the outer edge portion of the base portion 31 on the second light-emitting element 63 side. The third light-shielding portion 35 has a rear side wall portion 35a, a folded-back portion 35b, a side wall portion 35c, and a front side wall portion 35d, and a part of the first light is shielded by the front side wall portion 35d. The rear side wall portion 35a is arranged on the side opposite to the second substrate 60 side of the base portion 31 and on the first side reflector 41a side of the first light emitting element 55 and the second light emitting element 63. The rear side wall portion 35a extends vertically and horizontally and is connected to the base portion 31. The folded-back portion 35b is arranged in front of the rear side wall portion 35a on the side opposite to the first light emitting element 55 side of the first side reflector 41a. The folded-back portion 35b extends substantially parallel to the rear side wall portion 35a, and the side opposite to the first side reflector 41a side is connected to the rear side wall portion 35a. The side wall portion 35c is arranged in front of the folded-back portion 35b on the side opposite to the first light emitting element 55 side of the first side reflector 41a. The side wall portion 35c extends in a direction substantially parallel to the inner side wall portion 32a of the fixing portion 32, and is connected to the first side reflector 41a side of the folded portion 35b. The front side wall portion 35d is arranged in front of the first side reflector 41a and on the first side reflector 41a side of the first light emitting element 55 and the second light emitting element 63. The front side wall portion 35d extends vertically and horizontally and is connected to the side wall portion 35c. Such a front side wall portion 35d shields a part of the first light emitted from the first light emitting element.

Next, the fixing of the second substrate 60 to the heat sink 80 will be described in detail.

FIG. 18 is a view showing a state in which the second substrate is fixed to the heat sink, and is a cross-sectional view of the light source unit LU passing through the convex portion 31a in the base portion 31 of the support plate 30. In FIG. 18, the vicinity of the convex portion 31a is shown, and the description of the connector 64 and the like is omitted. As described above, the support plate 30 is fixed to the heat sink 80 by fixing the pair of fixing portions 32 to the two bosses 100 of the heat sink 80 by the screws 101, respectively. Specifically, the front wall portion 32c of the fixed portion 32 is in a state where the convex portion 31a of the base portion 31 is in contact with the second substrate 60 and the through holes of the front wall portion 32c and the female screw 100a are aligned. The end face of the boss 100 and the front wall portion 32c are formed so as to be substantially parallel to each other and slightly separated from each other. The support plate 30 is fixed to the heat sink 80 by inserting the screw 101 into the through hole of the front wall portion 32c and screwing it into the female screw 100a. At this time, the support plate 30 is pushed toward the heat sink 80 by the screw 101 so that the gap between the end face of the boss 100 and the front wall portion 32c is narrowed. Here, since the front wall portion 32c substantially parallel to the end surface of the boss 100 extends substantially in the vertical direction, the support plate 30 is pushed backward by the screw 101. As described above, the convex portion 31a of the base portion 31 is in contact with the mounting surface 60s on which the second light emitting element 63 is mounted on the second substrate 60. Therefore, the support plate 30 is elastically deformed, and the elastic force of the support plate 30 acts on the contact portion 31b of the second substrate 60. Since the support plate 30 is pushed backward, the elastic force F of the support plate 30 acting on the contact portion 31b is directed backward as shown in FIG. The second substrate 60 is fixed to the heat sink 80 by the elastic force F of the support plate 30. Here, as described above, since the second substrate 60 mounted on the second mounting surface 91 extends diagonally forward and downward, the direction in which the support plate 30 is pushed in and the second substrate 60 in the second substrate 60 It is non-perpendicular and non-parallel to the mounting surface 60s on which the light emitting element 63 is mounted. Therefore, the direction of the elastic force F of the support plate 30 is non-perpendicular and non-parallel to the mounting surface 60s on the second substrate 60. Therefore, the elastic force F of the support plate 30 is composed of a force F1 in a direction perpendicular to the second mounting surface 91 and a force F2 along the second mounting surface 91. Since the second substrate 60 mounted on the second mounting surface 91 extends diagonally downward and forward, the force F2 along the second mounting surface 91 in the elastic force F of the support plate 30 goes upward. ..

The second substrate 60 is pressed against the second mounting surface 91 by the force F1 in the direction perpendicular to the second mounting surface 91 among the elastic forces F of the support plate 30. Further, the second substrate 60 is pushed upward along the second mounting surface 91 by the force F2 along the second mounting surface 91 among the elastic forces F of the support plate 30, and the side surface of the second substrate 60 A part of the heat sink 80 is pressed against the outer peripheral surface of the protrusion 94. More specifically, as shown in FIG. 17, the lower second contact surface 62s of the positioning recess 62 of the second substrate 60 is pressed against the lower contact surface 94s of the protrusion 94 of the heat sink 80. That is, of the elastic force F of the support plate 30, the force F2 along the second mounting surface 91 is a force that presses the second substrate 60 against the lower contact surface 94s of the protrusion 94. In this way, the second substrate 60 is pressed against the lower contact surface 94s of the protrusion 94, and the second substrate 60 is displaced along the second mounting surface 91 in the direction opposite to the pressing direction with respect to the contact surface 94s. Is suppressed.

In the present embodiment, as described above, the two contacting portions 31b are located on the side opposite to the second light emitting element 63 side of the positioning recess 62 of the second substrate 60, and the positioning recess 62 is projected. 94 is in. That is, the lower contact surface 94s of the protrusion 94 is such that the support plate 30 presses the second substrate 60 against the lower contact surface 94s of the protrusion 94 with respect to the contact portion 31b when the second substrate 60 is viewed in a plan view. It is located in the direction of force F2. Further, in the present embodiment, as shown in FIG. 7, the two contact portions 31b are in the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate is viewed in a plan view. They overlap each other in the vertical direction. Further, one contact portion 31b corresponds to one protrusion 94, and the other contact portion 31b corresponds to the other protrusion 94. More specifically, as shown in FIG. 17, at least a part of the lower contact surface 94s of one of the protrusions 94 is between the straight line La and the straight line Lb when the second substrate 60 is viewed in a plan view. positioned. The straight line La is one end of one contact portion 31b in a direction parallel to and perpendicular to the direction of the force F2 in which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. It is a straight line passing through. The straight line Lb is a straight line that is parallel to the straight line La and passes through the other end of one of the contact portions 31b. Further, as shown in FIG. 7, at least a part of the lower contact surface 94s of the other protrusion 94 is located between the straight line Lc and the straight line Ld when the second substrate 60 is viewed in a plan view. .. Here, the positional relationship between the two protrusions 94 shown by the broken lines in FIG. 7 and the second substrate 60 is a positional relationship in which the second substrate 60 is fixed to the heat sink 80 by the elastic force of the support plate 30. There is. The straight line Lc is one end of the other contact portion 31b in a direction parallel to and perpendicular to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. It is a straight line passing through. The straight line Ld is a straight line parallel to the straight line Lc and passing through the other end of the other contact portion 31b.

By the way, the straight line La passing through one contact portion 31b is located on the opposite side to the other contact portion 31b side. The straight line Lc in the other contact portion 31b is located on the side opposite to the one contact portion 31b side. These straight lines La and Lc are parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. Therefore, the straight line La is parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view, and the other contact portion 31b in one contact portion 31b. It is also a straight line that passes through the end opposite to the side. Further, the straight line Lc is also a straight line parallel to the straight line La and passing through the end of the other contact portion 31b on the side opposite to the one contact portion 31b side. At least a part of the lower contact surface 94s of one protrusion 94 and at least a part of the lower contact surface 94s of the other protrusion 94 are located between the straight line La and the straight line Lc. ..

The straight line Lb passing through one contact portion 31b is located on the other contact portion 31b side, and the straight line Ld in the other contact portion 31b is located on the one contact portion 31b side. These straight lines Lb and Ld are parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. Therefore, the straight line Lb is parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view, and the other contact portion 31b in one contact portion 31b. It is also a straight line passing through the side edge. Further, the straight line Ld is also a straight line parallel to the straight line Lb and passing through the end of the other contact portion 31b on the one contact portion 31b side. The center of gravity 60G of the second substrate 60 is located between the straight line Lb and the straight line Ld. Therefore, the center of gravity 60G of the second substrate 60 is also located between the straight line La and the straight line Lc.

Further, in the present embodiment, since the grease 24 as a flow member is applied to the surface of the second substrate 60 opposite to the side on which the second light emitting element 63 is mounted as described above, FIGS. 14 and 18 As shown in the above, grease 24 is interposed between the second substrate 60 and the second mounting surface 91. Therefore, when the second substrate 60 is pressed against the second mounting surface 91, a part of the grease 24 may be pushed out from between the second substrate 60 and the second mounting surface 91. As described above, the second mounting surface 91 is the end surface of the pedestal 95 protruding forward from the front surface 83f of the second base plate 83, and the outer edge of the second mounting surface 91 is surrounded by the outer edge of the second substrate 60. ing. Therefore, the excess grease 24 extruded from between the second substrate 60 and the second mounting surface 91 is extruded onto the front surface 83f of the second base plate 83 around the pedestal 95. Therefore, it is suppressed that a part of the excess grease 24 adheres to the mounting surface 60s on which the second light emitting element 63 of the second substrate 60 is mounted, and the excess grease 24 adheres to the second light emitting element 63, etc. Is suppressed. The flow member is not limited to grease. The flow member is a member having fluidity at least when the first substrate 50 is mounted on the first mounting surface 86 and when the second substrate 60 is mounted on the second mounting surface 91. Any member may be used, and the member is not limited to a member having constant fluidity. Therefore, the flow member is uncured even after the first substrate 50 and the second substrate 60 such as grease and adhesive shown in the present embodiment are placed on the mounting surfaces 86 and 91. It includes a mold flow member and a curable flow member that can be cured after the first substrate 50 or the second substrate 60 such as an adhesive formed from a thermosetting resin or the like is placed on a mounting surface. Further, the flow member interposed between the first substrate 50 and the first mounting surface 86 and the flow member interposed between the second substrate 60 and the second mounting surface 91 may be the same members. , May be different members.

Further, as described above, a recess 96 for a flow member is formed between the outer peripheral surface of the heat sink 80 on the lower side of the pedestal 90 and the front surface 83f of the second base plate 83 on the upper side of the pedestal 95. The outer edge 86e on the second mounting surface 91 side of the outer edge of the first mounting surface 86 is substantially parallel to the outer edge 91e located on the first mounting surface 86 side of the outer edge of the second mounting surface 91. It extends in the left-right direction. The outer edge of the first mounting surface 86 is surrounded by the outer edge of the first substrate 50, and the outer edge of the second mounting surface 91 is surrounded by the outer edge of the second substrate 60. Therefore, of the outer edges of the first mounting surface 86, the outer edge 86e on the second mounting surface 91 side is the edge on the first mounting surface 86 on the second substrate 60 side of the region overlapping the first substrate 50. The outer edge 91e located on the first mounting surface 86 side of the outer edge of the second mounting surface 91 is the edge on the first substrate 50 side of the region of the second mounting surface 91 that overlaps with the second substrate 60. That is, the recess 96 for the flow member is the first substrate in the region overlapping the second substrate 60 on the second mounting surface 91 and the edge on the second substrate 60 side of the region overlapping the first substrate 50 on the first mounting surface 86. It is formed between the edge on the 50 side. Therefore, of the excess grease 24 extruded from between the first substrate 50 and the first mounting surface 86, a part of the grease 24 toward the second substrate 60 side can be accommodated in the flow member recess 96. .. Further, of the excess grease 24 extruded from between the second substrate 60 and the second mounting surface 91, a part of the grease 24 toward the first substrate 50 side can be accommodated in the flow member recess 96. That is, a part of the excess grease 24 that collects between the first substrate 50 and the second substrate 60 can be accommodated in the recess 96 for the flow member.

Further, as described above, the outer edge 86e located at the lower end of the outer edge of the first mounting surface 86 on the side of the second mounting surface 91 is the outer edge of the second mounting surface 91 on the side of the first mounting surface 86. It is substantially parallel to the outer edge 91e located at the upper end and extends in the left-right direction. Therefore, the region sandwiched between the outer edge 86e and the outer edge 91e is the edge of the region overlapping the first substrate 50 on the first mounting surface 86 on the second substrate 60 side and the second substrate 60 on the second mounting surface 91. This is the region where the distance from the edge of the first substrate 50 side of the region overlapping with the first substrate 50 is minimized. At least a part of the flow member recess 96 is located in this region.

Further, as shown in FIG. 8, at least a part of the recess 96 for the flow member is in a direction perpendicular to the direction from the first substrate 50 side to the second substrate 60 side in the first light emitting element 55 of the first substrate 50. It is located between a first straight line Lf that passes through one end and is parallel to the direction from the first substrate 50 side to the second substrate 60 side, and a second straight line Ls that passes through the other end and is parallel to the first straight line Lf. That is, at least a part of the recess 96 for the flow member passes through one end of the first light emitting element 55 in the left-right direction and is parallel to the vertical direction, and a second straight line that passes through the other end and is parallel to the first straight line Lf. It is located between Ls. Further, although description by illustration is omitted, at least a part of the recess 96 for the flow member is perpendicular to the direction from the first substrate 50 side to the second substrate 60 side in the second light emitting element 63 of the second substrate 60. It is located between a straight line that passes through one end of the direction and is parallel to the direction from the first substrate 50 side to the second substrate 60 side, and another straight line that passes through the other end and is parallel to this straight line. That is, at least a part of the recess 96 for the flow member is located between a straight line passing through one end in the left-right direction of the second light emitting element 63 and parallel to the vertical direction and another straight line passing through the other end and parallel to this straight line. doing.

Next, the projection lens 20 will be described.

The projection lens 20 shown in FIGS. 1 to 4 is a plano-convex lens and is arranged in front of the light source unit LU. The first light and the second light emitted from the light source unit LU enter from the flat incident surface on the back side of the projection lens 20 and pass through the projection lens 20. The projection lens 20 has a flange portion 21 on the outer circumference. Examples of the material for forming the projection lens 20 include resin and glass.

Next, the lens holder 25 will be described.

The lens holder 25 shown in FIGS. 1 to 4 is arranged between the heat sink 80 and the projection lens 20. The projection lens 20 is fixed to the lens holder 25. By fixing the lens holder 25 to the heat sink, the relative positions of the projection lens 20, the lens holder 25, and the heat sink 80 are fixed. Further, as described above, the reflector unit 40, the support plate 30, the first substrate 50, and the second substrate 60 are fixed to the heat sink 80. Therefore, the relative positions of the reflector unit 40, the support plate 30, the first substrate 50, the second substrate 60, the projection lens 20, and the lens holder 25 are also fixed.

The lens holder 25 has a cylindrical holding portion 26 and a leg portion 27. The lens holder 25 is made of, for example, resin, and the holding portion 26 and the leg portion 27 are integrally formed. The holding portion 26 extends from the projection lens 20 side to the heat sink 80 side. The flange portion 21 of the projection lens 20 is fixed to the end of the holding portion 26 on the projection lens 20 side. The leg portion 27 extends from the end portion of the holding portion 26 on the heat sink 80 side to the heat sink 80 side. In this embodiment, the lens holder 25 has three legs 27. The two legs 27 are arranged side by side in the left-right direction, and the other legs 27 are arranged above the two legs 27 arranged in parallel. Flange portions 28 are formed at the ends of the three legs 27 on the heat sink 80 side, and the flange portions 28 are fixed to the heat sink 80 by screws 29, respectively.

Of the three legs 27 fixed to the heat sink 80 in this way, the two legs 27 arranged in parallel sandwich the pair of first light-shielding portions 33 of the support plate 30. Further, as described above, since the pair of first light-shielding portions 33 are connected to the fixed portions 32 connected to the left-right ends of the base portion 31 of the support plate 30, respectively, the pair of first light-shielding portions 33 Are arranged side by side in the left-right direction. Therefore, one first light-shielding portion 33 is located between one leg portion 27 of the two legs 27 arranged in parallel and the projection lens 20, and the other first light-shielding portion 33 is the other leg portion 27. It is located between the projection lens 20 and the projection lens 20. By providing such a first light-shielding portion 33, at least a part of the sunlight transmitted through the projection lens 20 and incident is irradiated to the first light-shielding portion 33 without irradiating the leg portion 27 of the lens holder 25. To. Therefore, damage to the lens holder 25 due to sunlight is suppressed.

Further, as described above, the upper wall portion 34a of the second light-shielding portion 34 of the support plate 30 is arranged above the connector 64 and extends substantially parallel to the base portion 31. Therefore, the upper wall portion 34a of the second light-shielding portion 34 is located between the connector 64 and the projection lens 20. By providing such a second light-shielding portion 34, at least a part of the sunlight transmitted through the projection lens 20 and incident is irradiated to the upper wall portion 34a of the second light-shielding portion 34 without irradiating the connector 64. To. Therefore, damage to the connector 64 due to sunlight is suppressed. Further, it becomes difficult to visually recognize the connector 64 through the projection lens 20, and the design of the lamp unit can be improved.

Next, the emission of light from the vehicle headlight 1 of the present embodiment will be described.

FIG. 19 is a schematic cross-sectional view of the lamp unit, and is a diagram schematically showing an example of an optical path of light emitted from the first light emitting element and the second light emitting element. In FIG. 19, the description of the heat sink 80, the fan 81, and the like is omitted. In addition, the angle of each reflecting surface, the angle of reflection of light, the angle of refraction, and the like may not be accurate. Further, as described above, the vehicle headlights are provided symmetrically on the left and right sides of the vehicle. In the following description of the light distribution, the light distribution when the vehicle headlights provided on the left and right are similarly turned on or off will be described.

As shown in FIG. 19, a part of the first light L1 emitted from the first light emitting element 55 is directly incident on the projection lens 20, and the other part of the first light L1 is the first reflecting surface of the shade 43. It is reflected by either 43a or the third reflecting surface 41r of the reflector 41 and is incident on the projection lens 20. Further, although the description by illustration is omitted, a part of the light diffused in the left-right direction among the first light L1 emitted from the first light emitting element 55 is reflected by the first side reflector 41a and the second side reflector 41b. It is incident on the projection lens 20. Further, a part of the first light L1 that is emitted behind the front end 43c of the shade 43 is blocked by the shade 43. Further, a part of the first light L1 that irradiates the front side wall portion 35d of the third light shielding portion 35 of the support plate 30 is shielded by the front side wall portion 35d. In this way, the low beam light distribution shown in FIG. 20A is generated by the first light L1 that is emitted from the first light emitting element 55, is incident on the projection lens 20, is transmitted, and is emitted through the front cover 12. It is formed. In FIG. 20A, S indicates a horizontal line.

Further, a part of the second light L2 emitted from the second light emitting element 63 is directly incident on the projection lens 20, and the other part of the second light L2 is the second reflecting surface 43b of the shade 43 and the reflector 42. It is reflected by any of the fourth reflecting surfaces 42r and is incident on the projection lens 20. Further, although the description by illustration is omitted, a part of the light diffused in the left-right direction among the second light L2 emitted from the second light emitting element 63 is reflected by the first side reflector 42a and the second side reflector 42b. It is incident on the projection lens 20. Further, a part of the light radiated to the front side wall portion 35d of the third light shielding portion 35 of the support plate 30 in the second light L2 is blocked by the front side wall portion 35d. In this way, the light distribution by the second light L2, which is emitted from the second light emitting element 63, is incident on the projection lens 20, is transmitted, and is emitted through the front cover 12, and the light distribution of the low beam are combined. The high beam light distribution shown in FIG. 20 (B) is formed. In FIG. 20B, S indicates a horizontal line.

Next, cooling of the light source unit LU will be described.

As described above, a part of the heat generated when the first light emitting element 55 emits light is transferred from the first substrate 50 to the first base plate 82 of the heat sink 80 via the grease 24. Further, a part of the heat generated when the second light emitting element 63 emits light is transferred from the second substrate 60 to the second base plate 83 of the heat sink 80 via the grease 24. The grease 24 suppresses the formation of an air layer between the first substrate 50 and the heat sink 80 and between the second substrate 60 and the heat sink 80, and the heat transfer coefficient between the two is not via the grease 24. It is improved compared to the case. Even when an adhesive or an adhesive is used as the flow member instead of the grease 24, an air layer may be formed between the first substrate 50 and the heat sink 80 and between the second substrate 60 and the heat sink 80. It is suppressed and the heat transfer coefficient between each is improved. In this way, air is sent from the fan 81 to the back surfaces 82b and 83b of the first base plate 82 and the second base plate 83 to which heat is transferred from the first light emitting element 55 and the second light emitting element 63. Specifically, as shown in FIG. 14, the fan 81 sucks air into the internal space of the peripheral wall portion 84 from the opening 84H of the peripheral wall portion 84, and sends the sucked air to the front end side of the peripheral wall portion 84. That is, the fan 81 forms a flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H of the peripheral wall portion 84. Since a part of the front end of the peripheral wall portion 84 is fixed to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83, this air is air from the back surface 82b of the first base plate 82 and the second base plate 83. , 83b, and an air flow is formed on these back surfaces 82b, 83b. Therefore, it is suppressed that air stays in the vicinity of the back surfaces 82b and 83b, the first base plate 82 and the second base plate 83 are cooled, and the first light emitting element 55 and the second light emitting element 63 are cooled. The air sent out by the fan 81 is exhausted from at least one of the first vent 98a and the second vent 98b.

By the way, as described above, the fan 81 is configured so that the blowing direction can be switched in the opposite direction. When the blowing direction of the fan 81 is switched, the fan 81 sucks in the air on the first base plate 82 and the second base plate 83 side of the internal space of the peripheral wall portion 84 with respect to the fan 81, and the sucked air is sucked into the peripheral wall. It is sent out to the opening 84H side of the portion 84 and flows out from the opening 84H to the external space of the peripheral wall portion 84. That is, the fan 81 forms a flow of air flowing from the internal space of the peripheral wall portion 84 to the external space through the opening 84H of the peripheral wall portion 84. The first vent 98a and the second vent 98b are arranged on the first base plate 82 and the second base plate 83 side of the fan 81. Therefore, air flows into the internal space of the peripheral wall portion 84 from the first vent 98a and the second vent 98b, and this air goes to the fan 81. That is, the air flow direction between the back surfaces 82b and 83b and the fan 81 is a direction from the front to the rear. By the way, the first vent 98a and the second vent 98b are the first base plate 82 and the second base plate 83 in a cross section perpendicular to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. It is arranged on the side opposite to the fan 81 side from the connection portion 99 of. Therefore, the air in the vicinity of the back surfaces 82b and 83b is sucked by the fan 81, and an air flow is formed on the back surfaces 82b and 83b. Therefore, it is suppressed that air stays in the vicinity of the back surfaces 82b and 83b, the first base plate 82 and the second base plate 83 are cooled, and the first light emitting element 55 and the second light emitting element 63 are cooled.

Next, a method of manufacturing the heat sink 80 will be described.

FIG. 21 is a flowchart showing a method for manufacturing the heat sink shown in FIGS. 4 to 6. Further, FIG. 22 is a schematic cross-sectional view showing a part of the intermediate member, specifically, FIG. 22 (A) is a schematic cross-sectional view showing the vicinity of the boss, and FIG. 22 (B) is a second base. It is sectional drawing which shows the vicinity of the protrusion formed on a plate. As shown in FIG. 21, the method for manufacturing the heat sink 80 of the present embodiment includes a mold forming step P1 and a cutting step P2 as main steps.

The mold forming step P1 is a step of forming the intermediate member 80i to be the heat sink 80 by mold forming. As shown in FIG. 22, the intermediate member 80i of the present embodiment has a first temporary mounting surface 86p, a second temporary mounting surface 91p, a first temporary contact surface 88sp, and a second temporary contact surface 94sp. In that respect, the configuration is different from that of the heat sink 80 described above. The first temporary mounting surface 86p covers the first mounting surface 86, and the second temporary mounting surface 91p covers the second mounting surface 91. The first temporary contact surface 88sp covers the contact surface 88s formed on the boss 88, and the second temporary contact surface 94sp covers the contact surface 94s formed on the upper outer peripheral surface of the protrusion 94.

In the mold forming step P1, the material forming the heat sink 80 is melted, and the melted material is press-fitted into the cavity formed in the mold. The cavity is a space corresponding to the intermediate member 80i. In the present embodiment, the mold opening direction of the mold is substantially parallel to the extending direction of the first rib 87. Since the extending directions of the first rib 87 and the second rib 92 are substantially parallel, the mold opening direction is substantially parallel to the extending direction of the second rib 92. Next, the molten material filled in the cavity is cooled, and the cooled and solidified intermediate member 80i is taken out from the mold. Examples of the material for forming the heat sink 80 include an aluminum alloy and the like. The mold forming step P1 is not particularly limited as long as the intermediate member 80i can be formed by mold forming.

The cutting step P2 is a step of cutting a part of the intermediate member 80i formed in the mold forming step P1. Specifically, the first temporary mounting surface 86p is cut to form the first mounting surface 86, and the first temporary contact surface 88sp is cut to form the contact surface 88s. Here, a part of the first mounting surface 86 and a part of the contact surface 88s are formed at the same time. Next, the second temporary mounting surface 91p is cut to form the second mounting surface 91, and the second temporary contact surface 94sp is cut to form the contact surface 94s. Here, a part of the second mounting surface 91 and the contact surface 94s are formed at the same time. In this way, the first mounting surface 86, the contact surface 88s, the second mounting surface 91, and the contact surface 94s are formed on the intermediate member 80i, and the intermediate member 80i serves as the heat sink 80. In the cutting step P2, after forming the second mounting surface 91 and the contact surface 94s, the first mounting surface 86 and the contact surface 88s may be formed.

By the way, when the substrate is mounted on the heat sink as in the light source unit of Patent Document 1, grease may be interposed between the substrate and the heat sink in order to improve the heat transfer property between the substrate and the heat sink. When the substrate mounted on the heat sink is fixed to the heat sink via the grease in this way, a part of the grease interposed between the substrate and the heat sink may be extruded from between the substrate and the heat sink. In this case, when a plurality of substrates are mounted in parallel on one heat sink as in the above-mentioned light source unit, excess grease tends to accumulate between adjacent substrates. Therefore, excess grease tends to adhere to the surface of the substrate opposite to the heat sink side. Since a light emitting element may be mounted or a circuit may be formed on the surface of the substrate opposite to the heat sink side, excess grease may adhere to the light emitting element or the circuit. If excess grease adheres to the light emitting element or the circuit, there is a concern that the optical path of the light emitted from the light emitting element changes and a desired light distribution cannot be obtained, or a short circuit occurs in the circuit.

Therefore, the light source unit LU of the present embodiment as the first aspect includes a first substrate 50, a second substrate 60, a heat sink 80, and grease 24 as a flow member. The first light emitting element 55 is mounted on the first substrate 50, and the second light emitting element 63 is mounted on the second substrate 60. The heat sink 80 has a first mounting surface 86 on which at least a part of the first substrate 50 is mounted and a second mounting surface 91 on which at least a part of the second substrate 60 is mounted. The grease 24 is interposed between the first substrate 50 and the first mounting surface 86 and between the second substrate 60 and the second mounting surface 91. The first substrate 50 and the second substrate 60 are placed on the heat sink 80 at a predetermined interval. The heat sink 80 has an edge on the first mounting surface 86 on the side of the second substrate 60 of the region overlapping the first substrate 50 and an edge on the second mounting surface 91 on the side of the region overlapping the second substrate 60 on the first substrate 50 side. It has a recess 96 for a flow member capable of accommodating a part of grease 24 as a flow member between the two.

In the present embodiment as the first aspect, as described above, the heat sink 80 is on the edge of the first mounting surface 86 on the second substrate 60 side and the second mounting surface 91 in the region overlapping with the first substrate 50. A flow member recess 96 capable of accommodating a part of the grease 24 is provided between the second substrate 60 and the edge of the region overlapping the second substrate 60 on the first substrate 50 side. Therefore, a part of the excess grease 24 extruded from between the first substrate 50 and the first mounting surface 86 toward the second substrate 60 side can be accommodated in the flow member recess 96. Further, of the excess grease 24 extruded from between the second substrate 60 and the second mounting surface 91, a part of the grease 24 toward the first substrate 50 side can be accommodated in the flow member recess 96. Therefore, a part of the excess grease 24 accumulated between the first substrate 50 and the second substrate 60 is on the surface of the first substrate 50 opposite to the first mounting surface 86 side or on the surface of the second substrate 60. 2 Adhesion to the surface opposite to the mounting surface 91 side can be suppressed. Therefore, it is possible to prevent the excess grease 24 from adhering to the first light emitting element 55 mounted on the first substrate 50 and the second light emitting element 63 mounted on the second substrate 60. Therefore, it is possible to provide a light source unit capable of suppressing defects.

In the present embodiment as the first aspect, at least a part of the recess 96 for the flow member is the edge on the second substrate 60 side and the second mounting surface of the region of the first mounting surface 86 that overlaps with the first substrate 50. The region 91 overlaps with the second substrate 60 and is located in the region where the distance from the edge on the first substrate 50 side is minimized.

The excess grease 24 is on the edge of the region of the first mounting surface 86 that overlaps with the first substrate 50 on the side of the second substrate 60 and on the side of the first substrate 50 of the region of the second mounting surface 91 that overlaps with the second substrate 60. It tends to accumulate from the area where the distance to the edge is the minimum. In this light source unit LU, since the recess 96 for the flow member is located in such a region, a part of the excess grease 24 is on the surface of the first substrate 50 opposite to the first mounting surface 86 side and the second Adhesion to the surface of the substrate 60 opposite to the second mounting surface 91 side can be appropriately suppressed. Therefore, it is possible to appropriately prevent a part of the excess grease 24 from adhering to the first light emitting element 55 mounted on the first substrate 50 and the light emitting element 63 mounted on the second substrate 60.

In the present embodiment as the first aspect, at least a part of the recess 96 for the flow member is perpendicular to the direction from the first substrate 50 side to the second substrate 60 side in the first light emitting element 55 of the first substrate 50. It is located between a first straight line Lf that passes through one end of the direction and is parallel to the direction from the first substrate 50 side to the second substrate 60 side, and a second straight line Ls that passes through the other end and is parallel to the first straight line Lf.

With this configuration, a part of the surplus grease 24 and the first light emitting element 55 mounted on the first substrate 50 among the edges on the second substrate 60 side when the first substrate 50 is viewed in a plan view. It is possible to prevent the first substrate 50 from adhering to the surface opposite to the first mounting surface 86 side from a portion having a short distance. Therefore, it is possible to appropriately prevent a part of the excess grease 24 from adhering to the first light emitting element 55 mounted on the first substrate 50.

In the present embodiment as the first aspect, at least a part of the recess 96 for the flow member is perpendicular to the direction from the first substrate 50 side to the second substrate 60 side in the second light emitting element 63 of the second substrate 60. It is located between a straight line that passes through one end of the direction and is parallel to the direction from the first substrate 50 side to the second substrate 60 side, and another straight line that passes through the other end and is parallel to this straight line.

With this configuration, a part of the surplus grease 24 and the second light emitting element 63 mounted on the second substrate 60 among the edges on the first substrate 50 side when the second substrate 60 is viewed in a plan view. It is possible to prevent the second substrate 60 from adhering to the surface opposite to the second mounting surface 91 side from a portion having a short distance. Therefore, it is possible to appropriately prevent a part of the excess grease 24 from adhering to the second light emitting element 63 mounted on the second substrate 60.

In the present embodiment as the first aspect, the heat sink 80 has an outer peripheral surface on the lower side of the pedestal 90 in the first base plate 82 and a front surface 83f of the second base plate 83 on the upper side of the pedestal 95. These two surfaces are on the edge of the region of the first mounting surface 86 that overlaps with the first substrate 50 on the side of the second substrate 60 and on the side of the first substrate 50 of the region of the second mounting surface 91 that overlaps with the second substrate 60. It is located between the edges. Further, these two surfaces are arranged from the first mounting surface 86 side toward the second mounting surface 91 side, and the angle formed by the two surfaces is smaller than 180 degrees. The flow member recess 96 is formed between the two surfaces and is connected to the two surfaces.

In this light source unit LU as the first aspect, the heat sink 80 is on the edge of the first mounting surface 86 on the second substrate 60 side and the second mounting surface 91 in the region overlapping with the first substrate 50 as described above. It has two surfaces arranged from the first mounting surface 86 side to the second mounting surface 91 side between the edge of the region overlapping the second substrate 60 on the first substrate 50 side. Therefore, a part of the excess grease 24 from the first substrate 50 side to the second substrate 60 side is the outer peripheral surface on the lower side of the pedestal 90, which is the surface on the first mounting surface 86 side of these two surfaces. Can be pushed up. On the other hand, a part of the excess grease 24 from the second substrate 60 side to the first substrate 50 side is the second surface above the pedestal 95, which is the surface on the second mounting surface 91 side of the two surfaces. It can be extruded onto the front surface 83f of the base plate 83. By the way, when the flow member is located on two surfaces whose angle is smaller than 180 degrees and the two surfaces are visible from above, the flow members on at least one surface are these two. There is a tendency toward the space between the surfaces, and the flow member tends to accumulate between the two surfaces. As a state in which the two surfaces are visible from the upper side, for example, a state in which the two surfaces intersect in a substantially V shape can be mentioned. In FIG. 14, the fan 81 is larger than the first substrate 50 and the second substrate 60. An example is a state in which the heat sink 80 is rotated so as to be located on the lower side. In this light source unit LU, the angle formed by the outer peripheral surface on the lower side of the pedestal 90 and the front surface 83f of the second base plate 83 on the upper side of the pedestal 95 is set to be smaller than 180 degrees as described above, and is used for the flow member. The recess 96 is formed between the two surfaces and connects to the two surfaces. Therefore, at least one of the excess grease 24 extruded on the surface on the first mounting surface 86 side and the excess grease 24 extruded on the surface on the second mounting surface side tends to face the recess 96 for the flow member. Become. Therefore, the recess 96 for the flow member is at least one of the excess grease 24 from the first substrate 50 side to the second substrate 60 side and the excess grease 24 from the second substrate 60 side to the first substrate 50 side. Can properly contain a portion of. Therefore, it is possible to appropriately prevent the excess grease 24 from adhering to at least one of the first light emitting element 55 mounted on the first substrate 50 and the second light emitting element 63 mounted on the second substrate 60.

By the way, in a light source unit including a plurality of substrates as in Patent Document 2, there is a request to connect the substrates by a flexible printed circuit board having flexibility instead of a lead wire. The flexible printed circuit board may be connected by solder to the surface of the board opposite to the mounting member side. Therefore, when the flexible printed circuit board is connected between two boards whose angles are smaller than 180 degrees as in Patent Document 2, the board is connected to the board in the flexible printed circuit board. The force toward the opposite side is likely to act. In other words, a force for peeling the connection portion from the substrate is likely to act on the connection portion. For this reason, there is a concern that the connection portion of the flexible printed circuit board with the substrate may come off from the substrate, resulting in poor connection between the substrates.

Therefore, the light source unit LU of the present embodiment as the second aspect includes a first substrate 50, a second substrate 60, a heat sink 80, and a flexible printed circuit board 70. The first light emitting element 55 is mounted on the first substrate 50, and the second light emitting element 63 is mounted on the second substrate 60. The heat sink 80 has a first mounting surface 86 on which at least a part of the first substrate 50 is mounted and a second mounting surface 91 on which at least a part of the second substrate 60 is mounted. The flexible printed circuit board 70 has a first connection portion 71 connected to a mounting surface 50s on which the first light emitting element of the first board 50 is mounted, and a mounting surface 60s on which the second light emitting element of the second board 60 is mounted. It has a second connection portion 72 connected to. The first substrate 50 and the second substrate 60 are mounted on the heat sink 80 at a predetermined distance, and the normal extending toward the first substrate 50 of the first mounting surface 86 is the first of the second mounting surface 91. 2 It intersects with the normal extending to the 60 side of the substrate. The band portion 73 of the flexible printed circuit board 70 bends convexly toward the heat sink 80 side between the first substrate 50 and the second substrate 60, and the first mounting surface 86 is more than the first connection portion 71. Pass through the area on the side.

In the present embodiment as the second aspect, the normal extending toward the first substrate 50 side of the first mounting surface 86 is the normal extending toward the second substrate 60 side of the second mounting surface 91 as described above. Since they intersect, the angle formed by the first substrate 50 and the second substrate 60 is smaller than 180 degrees. Further, the flexible printed circuit board 70 bends convexly toward the heat sink 80 side between the first board 50 and the second board 60, and is closer to the first mounting surface 86 than the first connection portion 71. Go through the area. Therefore, a force pressed against the first substrate 50 side may act on the first connection portion 71. Therefore, it is possible to suppress the peeling of the first connection portion 71 from the first substrate 50, and it is possible to suppress the occurrence of poor connection between the first substrate 50 and the second substrate 60. Therefore, it can be a light source unit capable of suppressing defects.

In the present embodiment as the second aspect, the first substrate 50 is formed with a notch 54 extending from the outer edge on the side of the second substrate 60 to a predetermined position when the first substrate 50 is viewed in a plan view, and is flexible. The strip 73 of the printed circuit board 70 passes through the notch 54.

In order to bend the flexible printed circuit board 70, the length of the band portion 73 of the flexible printed circuit board 70 is required to some extent, so that the first substrate 50 is separated from the second substrate 60 to some extent. In this light source unit LU, as described above, the first substrate 50 is formed with a notch 54 extending from the outer edge on the second substrate 60 side to a predetermined position when the first substrate 50 is viewed in a plan view, and is flexible printed. The band portion 73 of the circuit board 70 passes through the notch 54. Therefore, the band portion 73 of the flexible printed circuit board 70 can be bent between the first substrate 50 and the second substrate 60 without increasing the distance between the first substrate 50 and the second substrate 60. Therefore, the distance between the first substrate 50 and the second substrate 60 can be shortened as compared with the case where the notch 54 is not formed in the first substrate 50, and the light source unit LU can be miniaturized.

In the present embodiment as the second aspect, the light emitting element 55 mounted on the first substrate 50 is more than the edge of the notch 54 on the side opposite to the second substrate 60 side when the first substrate 50 is viewed in a plan view. It is arranged on the second substrate 60 side.

As described above, when the notch 54 is not formed in the first substrate 50, the first substrate 50 and the second substrate 60 are separated to some extent in order to bend the band portion 73 of the flexible printed circuit board 70. I need to let you. Therefore, the first light emitting element 55 mounted on the first substrate 50 and the second light emitting element 63 mounted on the second substrate 60 are also separated to some extent. However, in this light source unit LU, the first light emitting element 55 mounted on the first substrate 50 as described above is on the side opposite to the second substrate 60 side in the notch 54 when the first substrate 50 is viewed in a plan view. It is arranged on the second substrate 60 side of the edge. Therefore, as compared with the case where the notch 54 is not formed in the first substrate 50, the distance between the first substrate 50 and the second substrate 60 is shortened as described above, and the first light emitting element 55 and the second light emitting element are shortened. The distance from 63 can also be shortened. Therefore, the optical member such as the reflector that reflects the light emitted from the two light emitting elements 55 and 63 can be miniaturized.

In the present embodiment as the second aspect, the heat sink 80 has a recess 89 recessed between the first substrate 50 and the second substrate 60 on the side opposite to the flexible printed circuit board 70 side of the first mounting surface 86. The flexible printed circuit board 70 passes through the recess 89.

With this configuration, the amount of deflection of the band portion 73 of the flexible printed circuit board 70 can be increased as compared with the case where the heat sink 80 does not have the recess 89. Therefore, the first connection portion 71 can be pressed more appropriately on the first substrate 50 side. Therefore, peeling of the first connection portion 71 from the first substrate 50 can be further suppressed.

In this embodiment as the second aspect, the flexible printed circuit board 70 is in non-contact with the heat sink 80.

In the present embodiment as the second aspect, since the light source unit LU is used for the vehicle headlight 1, the light source unit LU vibrates due to the vibration of the vehicle. When the flexible printed circuit board 70 is in contact with the heat sink 80 while the light source unit LU vibrates in this way, the flexible printed circuit board 70 and the heat sink 80 tend to rub against each other. When the flexible printed circuit board 70 and the heat sink 80 rub against each other, there is a possibility that problems such as disconnection of the power supply wiring 74c and the thermistor wiring 75c formed on the flexible printed circuit board 70 may occur. In this light source unit LU, since the flexible printed circuit board 70 is not in contact with the heat sink 80 as described above, the flexible printed circuit board 70 and the heat sink 80 rub against each other due to vibration of the light source unit LU or the like. Can be suppressed. Therefore, it is possible to suppress problems such as disconnection of the power supply wiring 74c and the thermistor wiring 75c formed on the flexible printed circuit board 70.

The flexible printed circuit board 70 may come into contact with the heat sink 80. However, from the viewpoint of suppressing the above-mentioned problems, it is preferable that the flexible printed circuit board 70 is not in contact with the heat sink 80.

In the present embodiment as the second aspect, the flexible printed circuit board 70 has a power supply wiring 74c and a thermistor wiring 75c extending from the first connection portion 71 to the second connection portion 72, and the power supply wiring 74c. A slit 73s is formed between the wiring and the thermistor wiring 75c. Therefore, at least a part between the power feeding wiring 74c and the thermistor wiring 75c can be spatially separated by the slit 73s. Therefore, as compared with the case where the slit 73s is not formed between the wirings 74c and 75c, even if migration occurs in the wirings 74c and 75c, it is possible to reduce the occurrence of a defect due to a short circuit.

In the present embodiment as the second aspect, two flexible printed circuit boards 70 are provided, and the center of gravity 50G of the first board 50 is the first of each of the two flexible printed circuit boards 70 connected to the first board 50. It is located between the connecting portions 71. Further, the center of gravity 60G of the second substrate 60 is located between the second connection portions 72 of the two flexible printed circuit boards 70 connected to the second substrate 60. Therefore, the first board 50 and the second board 60 are connected by two flexible printed circuit boards 70, and the two flexible printed circuit boards 70 are in a state before these boards 50 and 60 are mounted on the heat sink 80. The stress generated in the first connection portion 71 and the second connection portion 72 of the above can be suppressed. Specifically, for example, when the first substrate 50 is suspended from the second substrate 60, it is possible to prevent the flexible printed circuit board 70 from being twisted. Therefore, the stress generated in the first connection portion 71 and the second connection portion 72 of the two flexible printed circuit boards 70 can be suppressed. Therefore, in the state before the first substrate 50 and the second substrate 60 are mounted on the heat sink 80, the first connecting portion 71 is peeled off from the first substrate 50 and the second connecting portion 72 is separated from the second substrate 60. It can be suppressed from peeling from. Therefore, the centers of gravity 50G and 60G of the first substrate 50 and the second substrate 60 are located between the connecting portions 71 and 72 of the two flexible printed circuit boards 70 connected to the substrates 50 and 60, respectively. The handling of these substrates 50 and 60 becomes easier and the productivity of the light source unit LU is improved as compared with the case where there is no such substrate. The center of gravity 50G, 60G of at least one of the first substrate 50 and the second substrate 60 is connected to each of the two flexible printed circuit boards 70 connected to the one substrate 50, 60. It suffices if it is located between. With such a configuration, at least one of the first connection portion 71 and the second connection portion 72 is in the state before the first substrate 50 and the second substrate 60 are mounted on the heat sink 80. , 72 can be suppressed from peeling from the substrates 50 and 60 to which they are connected.

By the way, from the viewpoint of productivity of the mounting member or the like, a rib inclined with respect to the normal of the mounting surface on which the substrate is mounted may be formed on the mounting member. Similar to the substrate of Patent Document 3, there is a request to regulate the position of the substrate with respect to the mounting member by using such ribs. When such a rib is inserted into the through hole and the substrate is placed on the mounting surface, the rib is inserted obliquely into the through hole of the substrate. For this reason, when the position of the substrate with respect to the mounting member in the direction in which the rib extends is regulated when the mounting surface is viewed in a plan view, the outer peripheral surface of the rib on the side tilted with respect to the mounting surface is a through hole. Of the inner peripheral surface of the substrate that defines the above, abuts near the edge on the side opposite to the mounting surface side. On the other hand, the outer peripheral surface of the outer peripheral surface of the rib opposite to the side tilted with respect to the mounting surface abuts near the edge of the inner peripheral surface of the substrate defining the through hole on the mounting surface side.

By the way, when the substrate is formed of metal, the through holes of the substrate may be formed by punching from the viewpoint of productivity and the like. In this case, the inner peripheral surface of the substrate that defines the through hole tends to have irregularities formed by burrs on either the vicinity of the edge on the mounting surface side or the vicinity of the edge on the opposite side to the mounting surface side. For this reason, the ribs that are obliquely inserted into the through hole as described above are located near the edge on the mounting surface side and near the edge on the opposite side of the mounting surface side of the inner peripheral surface of the substrate that defines the through hole. Since it abuts on both sides, it may be difficult to regulate the position of the substrate with respect to the mounting member within a predetermined range due to the influence of burrs. If the position of the substrate with respect to the mounting member is different from the design value, the position of the light emitting element with respect to the optical member such as the reflector that reflects the light emitted from the light emitting element is also different from the design value, so that the desired light distribution cannot be obtained. Is a concern.

Therefore, the light source unit LU of the present embodiment as the third aspect includes the first substrate 50 on which the first light emitting element 55 is mounted, the second substrate 60 on which the second light emitting element 63 is mounted, and the heat sink 80. To be equipped. A through hole 51 penetrating in the plate thickness direction is formed in the first substrate 50, and a through hole 61 penetrating in the plate thickness direction is formed in the second substrate 60. The heat sink 80 has a first mounting surface 86, a second mounting surface 91, a first rib 87, a second rib 92, contact surfaces 88s and 97s, and contact surfaces 94s. At least a part of the first substrate 50 is mounted on the first mounting surface 86, and at least a part of the second substrate 60 is mounted on the second mounting surface 91. The first rib 87 is inclined with respect to the normal of the first mounting surface 86 and is inserted into the through hole 51 of the first substrate 50, and the second rib 92 is inclined with respect to the normal of the second mounting surface 91. It is inserted into the through hole 61 of the second substrate 60. The contact surface 88s abuts on the second contact surface 52s which is a part of the side surface of the first substrate 50, and the contact surface 97s corresponds to the third contact surface 53s which is a part of the side surface of the first substrate 50. Get in touch. The contact surface 94s comes into contact with the second contact surface 62s, which is a part of the side surface of the second substrate 60. At least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the first rib 87 in the direction perpendicular to the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plan view is a through hole 51. It comes into contact with the first contact surface 51s, which is a part of the inner peripheral surface of the first substrate 50 that defines. At least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the second rib 92 in the direction perpendicular to the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plan view is a through hole 61. The first contact surface 61s, which is a part of the inner peripheral surface of the second substrate 60, which defines the above. The tangent line between the third contact surface 53s and the contact surface 88s, which are a part of the side surface of the first substrate 50 when the first mounting surface 86 is viewed in a plan view, is substantially perpendicular to the extending direction of the first rib 87. And are non-parallel. Further, the tangent line between the second contact surface 52s and the contact surface 97s, which are a part of the side surface of the first substrate 50, is substantially perpendicular to and non-parallel to the extending direction of the first rib 87. The tangent line between the second contact surface 62s and the contact surface 94s, which are a part of the side surface of the second substrate 60 when the second mounting surface 91 is viewed in a plan view, is substantially perpendicular to the extending direction of the second rib 92. And are non-parallel.

In the present embodiment as the third aspect, the outer circumference of one side of the first rib 87 in the direction perpendicular to the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plan view as described above. At least one of the surface and the outer peripheral surface on the other side abuts on the first contact surface 51s, which is a part of the inner peripheral surface of the first substrate 50 that defines the through hole 51. Therefore, the position of the first substrate 50 with respect to the heat sink 80 in the direction perpendicular to the direction in which the first rib 87 extends when the first mounting surface 86 is viewed in a plan view can be restricted within a predetermined range. Further, the tangent line between the third contact surface 53s and the contact surface 88s that abuts on the third contact surface 53s when the first mounting surface 86 is viewed in a plane as described above is an extension of the first rib 87. It is non-parallel to the current direction. Further, the tangent line between the second contact surface 52s and the contact surface 97s that abuts on the second contact surface 52s when the first mounting surface 86 is viewed in a plan view is not the extending direction of the first rib 87. It is parallel. Therefore, the position of the first substrate 50 with respect to the heat sink 80 in the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plan view can be restricted within a predetermined range. Therefore, while restricting the position of the first substrate 50 with respect to the heat sink 80 within a predetermined range, the outer peripheral surface of the first rib 87 defines the through hole 51, and the first mounting surface of the inner peripheral surface of the first substrate 50. It is possible to suppress contact with at least one of the vicinity of the edge on the 86 side and the vicinity of the edge on the side opposite to the first mounting surface 86 side. Therefore, of the inner peripheral surface of the first substrate 50 that defines the through hole 51, the influence of unevenness formed near the edge on the first mounting surface 86 side or near the edge on the side opposite to the first mounting surface 86 side. Can be suppressed. Therefore, the position of the first light emitting element 55 with respect to an optical member such as the reflector unit 40 that reflects the first light L1 emitted from the first light emitting element 55 can be regulated within a predetermined range. Therefore, it can be a light source unit capable of forming a desired light distribution.

Further, as described above, at least one outer peripheral surface and the other outer peripheral surface of the second rib 92 in a direction perpendicular to the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plan view. One comes into contact with the first contact surface 61s, which is a part of the inner peripheral surface of the second substrate 60 that defines the through hole 61. Therefore, the position of the second substrate 60 with respect to the heat sink 80 in the direction perpendicular to the direction in which the second rib 92 extends when the second mounting surface 91 is viewed in a plan view can be restricted within a predetermined range. Further, the tangent line between the second contact surface 62s and the contact surface 94s that abuts on the second contact surface 62s when the second mounting surface 91 is viewed in a plane as described above is an extension of the second rib 92. It is non-parallel to the current direction. Therefore, the position of the second substrate 60 with respect to the heat sink 80 in the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plan view can be restricted within a predetermined range. Therefore, while restricting the position of the second substrate 60 with respect to the heat sink 80 within a predetermined range, the outer peripheral surface of the second rib 92 defines the through hole 61, and the second mounting surface of the inner peripheral surface of the second substrate 60. It is possible to suppress contact with at least one of the vicinity of the edge on the 91 side and the vicinity of the edge on the side opposite to the second mounting surface 91 side. Therefore, of the inner peripheral surface of the second substrate 60 that defines the through hole 61, the influence of the unevenness formed near the edge on the side of the second mounting surface 91 or near the edge on the side opposite to the side of the second mounting surface 91. Can be suppressed. Therefore, the position of the second light emitting element 63 with respect to an optical member such as the reflector unit 40 that reflects the second light L2 emitted from the second light emitting element 63 can be regulated within a predetermined range. Therefore, it can be a light source unit capable of forming a desired light distribution.

In the present embodiment as the third aspect, the heat sink 80 further has a rib reinforcing portion 93. The rib reinforcing portion 93 is connected to the front surface 83f of the second base plate 83 on which the second rib 92 is formed and the outer peripheral surface on the lower side which is the side tilted with respect to the second mounting surface 91 on the second rib 92. Will be done. Therefore, the strength of the second rib 92 is improved as compared with the case where the rib reinforcing portion 93 is not provided, and damage to the second rib 92 can be suppressed. Therefore, it is possible to suppress the displacement of the second substrate 60 with respect to the heat sink 80, and it is possible to suppress the change in the light distribution. The rib reinforcing portion 93 is preferably not in contact with the second substrate 60. By doing so, it is possible to prevent the rib reinforcing portion 93 from affecting the regulation of the position of the second substrate 60 with respect to the heat sink 80 by the second rib 92.

In the present embodiment as the third aspect, the heat sink 80 has a protrusion 94 on which the contact surface 94s is formed, and the second rib 92 is larger than the protrusion 94 in the normal direction of the second mounting surface 91. It is protruding. Therefore, the second rib 92 can be inserted into the through hole 61 of the second substrate 60 before the second substrate 60 comes into contact with the protrusion 94. Therefore, the position of the second substrate 60 with respect to the heat sink 80 can be regulated to some extent by the second rib 92 inserted into the through hole 61, and the second substrate 60 is placed on the second mounting surface in such a regulated state. It can be placed on 91. Therefore, the second substrate 60 can be easily mounted on the second mounting surface 91.

In the present embodiment as the third aspect, as described above, the heat sink 80 has the first mounting surface 86 on which at least a part of the first substrate 50 is mounted and at least a part of the second substrate 60. It has a second mounting surface 91 to be placed, and the first mounting surface 86 and the second mounting surface 91 are not parallel to each other. Further, the second mounting surface 91 is visible when viewed from the front side of the tip end side of the first rib 87 in the extending direction of the first rib 87.

When a heat sink having two mounting surfaces that are non-parallel to each other is formed by mold molding, the normal of at least one mounting surface is non-parallel to the mold opening direction. Therefore, when a rib is formed on a mounting surface whose normal line is not parallel to the mold opening direction, the protrusion extends in the mold opening direction and is inclined with respect to the normal line of the mounting surface from the viewpoint of productivity. Tends to be. Since the second mounting surface is visible when the mounting member is viewed from the extending direction of the rib, the mounting member can be formed by molding with the mold opening direction substantially parallel to the extending direction of the rib. In the present embodiment, since the second mounting surface 91 is visible when viewed from the front side of the tip end side of the first rib 87 in the extending direction of the first rib 87 as described above, the mold opening direction is set. It can be formed by mold forming substantially parallel to the extending direction of the first rib 87. Therefore, even if the heat sink 80 has the first mounting surface 86 and the second mounting surface 91 that are non-parallel to each other, the first rib is suppressed as described above while suppressing a decrease in the productivity of the heat sink 80. 87 can be used to regulate the position of the first substrate 50 with respect to the heat sink 80 within a predetermined range.

Further, the method for manufacturing the heat sink 80 used for the light source unit LU of the present embodiment as the fourth aspect is the method for manufacturing the heat sink 80 on which the first substrate 50 and the second substrate 60 are mounted. As described above, the heat sink 80 has a first mounting surface 86, a second mounting surface 91, a first rib 87, a second rib 92, a contact surface 88s, and a contact surface 94s. The contact surface 88s is in contact with a part of the side surface of the first substrate 50, and is not parallel to the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plan view. Further, the contact surface 94s is in contact with a part of the side surface of the second substrate 60, and is not parallel to the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plan view. In this embodiment, a mold forming step P1 and a cutting step P2 are provided. The mold forming step P1 is a step of forming the intermediate member 80i by mold forming. The intermediate member 80i includes a first temporary mounting surface 86p that covers the first mounting surface 86, a second temporary mounting surface 91p that covers the second mounting surface 91, and a first temporary contact surface 88sp that covers the contact surface 88s. The protrusion 94 has a second temporary contact surface 94sp, a first rib 87, and a second rib 92 that cover the contact surface 94s formed on the outer peripheral surface on the upper side. In the cutting step P2, the first temporary mounting surface 86p is cut to form the first mounting surface 86, and the first temporary contact surface 88sp is cut to form the contact surface 88s. At this time, a part of the first mounting surface 86 and a part of the contact surface 88s are formed at the same time. Further, the second temporary mounting surface 91p is cut to form the second mounting surface 91, and the second temporary contact surface 94sp is cut to form the contact surface 94s. At this time, a part of the second mounting surface 91 and the contact surface 94s are formed at the same time.

In the present embodiment as the fourth aspect, since a part of the first mounting surface 86 and a part of the contact surface 88s are simultaneously formed in the cutting step P2 as described above, these surfaces are formed separately. The productivity of the heat sink 80 can be improved as compared with the case where the heat sink 80 is used. Further, since a part of the second mounting surface 91 and the contact surface 94s are formed at the same time in the cutting step P2, the productivity of the heat sink 80 can be improved as compared with the case where these surfaces are formed separately.

By the way, when the light source unit is used for, for example, a vehicle lamp, the light source unit vibrates due to the vibration of the vehicle. When the substrate is pressed against the mounting member by a force substantially perpendicular to the mounting surface as in the light source unit of Patent Document 4, if the light source unit vibrates, the substrate may shift along the mounting surface. If the position of the substrate with respect to the mounting member shifts, the position of the light emitting element with respect to the optical member such as the reflector shifts, and there is a concern that the desired light distribution cannot be obtained.

Therefore, the light source unit LU of the present embodiment as the fifth aspect includes a second substrate 60, a heat sink 80 as a mounting member, and a support plate 30 as a pressing member. The second light emitting element 63 is mounted on the second substrate 60. The heat sink 80 has a second mounting surface 91 on which at least a part of the second substrate 60 is mounted and a contact surface 94s that abuts a part of the side surface of the second substrate 60. The support plate 30 contacts the contact portion 31b on the mounting surface 60s on which the second light emitting element 63 is mounted on the second substrate 60, and presses the second substrate 60 against the second mounting surface 91 and the contact surface 94s.

Therefore, the second substrate 60 is pressed against the second mounting surface 91 and the contact surface 94s by the support plate 30. Therefore, even when the light source unit LU vibrates, the second substrate 60 is lifted from the second mounting surface 91, or the second substrate 60 is pressed against the contact surface 94s along the second mounting surface 91. It is possible to suppress the deviation to the opposite side of the direction. Therefore, it is possible to prevent the position of the second light emitting element 63 from being displaced with respect to an optical member such as the reflector unit 40 that reflects the light emitted from the second light emitting element 63. Therefore, it can be a light source unit capable of forming a desired light distribution.

In the present embodiment as the fifth aspect, at least a part of the contact surface 94s in one of the protrusions 94 is such that the support plate 30 makes the second substrate 60 the contact surface 94s when the second substrate 60 is viewed in a plan view. It is located between a straight line La passing through one end of the contact portion 31b in a direction parallel to the direction of the pressing force F2 and perpendicular to the direction, and another straight line Lb parallel to the straight line La and passing through the other end of the contact portion 31b. .. At least a part of the contact surface 94s of the other protrusion 94 is parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. It is located between a straight line Lc passing through one end of the contact portion 31b in the vertical direction and another straight line Ld parallel to the straight line Lc and passing through the other end of the contact portion 31b. Therefore, the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s is applied from the two contact portions 31b that come into contact with the support plate 30 on the second substrate 60 to the two contact portions 31b corresponding to each other. It will go to the surface 94s. Therefore, the support plate 30 can appropriately press the second substrate 60 against the two contact surfaces 94s, and the second substrate 60 is along the second mounting surface 91 even when the light source unit LU vibrates. Therefore, it is possible to appropriately suppress the deviation to the side opposite to the pressing direction with respect to the contact surface 94s.

In this embodiment as a fifth aspect, the second substrate 60 has two contact portions 31b. The center of gravity 60G of the second substrate 60 is parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view, and the other contact in one contact portion 31b. It is located between a straight line La passing through the end opposite to the portion 31b side and another straight line Lc parallel to the straight line La and passing through the end opposite to the one contact portion 31b side in the other contact portion 31b. Therefore, the support plate 30 can appropriately press the second substrate 60 against the second mounting surface 91 as compared with the case where the center of gravity 60G of the second substrate 60 is not located between the straight line La and the straight line Lc. it can. Therefore, even when the light source unit LU vibrates, it is possible to prevent the second substrate 60 from floating from the second mounting surface 91. Therefore, it is possible to prevent the second substrate 60 from being displaced with respect to the heat sink 80.

In this embodiment as a fifth aspect, the second substrate 60 has two contact portions 31b. At least a part of the contact surface 94s is parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view, and the other in the contact portion 31b. It is located between a straight line La passing through the end opposite to the contact portion 31b side and another straight line Lc parallel to the straight line La and passing through the end opposite to one contact portion 31b side in the other contact portion 31b. .. Therefore, as compared with the case where the contact surface 94s is located on the side opposite to the straight line Lc side with respect to the straight line La or the side opposite to the straight line La side with respect to the straight line Lc when the second substrate is viewed in a plan view. The support plate 30 can appropriately press the second substrate 60 against the contact surface 94s. Therefore, even when the light source unit LU vibrates, it is possible to appropriately prevent the second substrate 60 from shifting along the second mounting surface 91 in the direction opposite to the pressing direction with respect to the contact surface 94s.

In the present embodiment as the fifth aspect, the support plate 30 has elasticity, and the second substrate 60 is pressed against the second mounting surface 91 and the contact surface 94s by the elastic force F of the support plate 30. Therefore, even if a part of the side surface of the second substrate 60 and the contact surface 94s are separated from each other due to vibration of the light source unit LU or the like, the elastic force F of the support plate 30 causes the contact surface with a part of the side surface of the second substrate 60. It can come into contact with the contact surface 94s. That is, even if the second substrate 60 is displaced along the second mounting surface 91 in the direction opposite to the pressing direction with respect to the contact surface 94s due to vibration of the light source unit LU or the like, the position is substantially the same as before the second substrate 60 is displaced. Can be moved to.

By the way, in a vehicle headlight represented by an automobile headlight, in addition to a light source unit for a low beam that illuminates the front at night, a light source unit for a high beam that illuminates a distance farther than the low beam may be mounted. In a lamp equipped with two light source units as described above, there is a demand for integrating these two light source units in a side-by-side state from the viewpoint of reducing the number of parts and downsizing. In response to this request, for example, two substrates on which light emitting elements are mounted are mounted on the same mounting surface of one heat sink, and the light emitting light mounted on the two substrates and the two substrates by this one heat sink, respectively. It is conceivable to cool the element.

However, when two substrates are mounted on one heat sink in this way, heat tends to accumulate in the region between the two substrates in the heat sink. For this reason, the heat transferred from the two substrates to the heat sink is difficult to be dispersed throughout the heat sink, the heat sink is partially overheated, and the two substrates and the light emitting elements mounted on the two substrates cannot be efficiently cooled. In some cases. As a measure for suppressing such overheating of the heat sink, it is conceivable to mount the two substrates on the heat sink at a further distance. However, in this case, there is a concern that the heat sink becomes large and the light source unit and the lamp equipped with the light source unit become large.

Therefore, in the light source unit LU of the present embodiment as the sixth aspect, the first substrate 50 on which the first light emitting element 55 is mounted, the second substrate 60 on which the second light emitting element 63 is mounted, and the first substrate are used. A heat sink 80 having a first mounting surface 86 on which at least a part of 50 is mounted and a second mounting surface 91 on which at least a part of the second substrate 60 is mounted is provided. The first substrate 50 and the second substrate 60 are mounted on the heat sink 80 at a predetermined distance, and the normal extending toward the first substrate 50 of the first mounting surface 86 is the first of the second mounting surface 91. 2 It intersects with the normal extending to the 60 side of the substrate.

Therefore, as compared with the case where the first mounting surface 86 and the second mounting surface 91 are located on the same plane, they are mounted on the first light emitting element 55 and the second substrate 60 mounted on the first substrate 50. The distance from the second light emitting element 63 can be shortened. Further, the distance between the first light emitting element 55 and the second light emitting element 63 along the surface of the heat sink 80 can be increased. Therefore, the heat generated by the first light emitting element 55 and the second light emitting element 63 can be more appropriately dispersed in the heat sink 80. Therefore, it is possible to prevent the region between the first light emitting element 55 and the second light emitting element 63 of the heat sink 80 from being overheated. Further, the distance between the first light emitting element 55 and the second light emitting element 63 can be shortened as compared with the case where the first mounting surface 86 and the second mounting surface 91 are located on the same plane, and the size is small. Can be transformed. Therefore, the light source unit can be miniaturized while suppressing overheating of the heat sink 80.

In the present embodiment as the sixth aspect, the light source unit LU includes a fan 81. The heat sink 80 has a first base plate 82 on which the first mounting surface 86 is formed on the front surface 82f, and a second base plate 83 on which the second mounting surface 91 is formed on the front surface 83f. The lower outer edge of the first base plate 82 and the upper outer edge of the second base plate 83 are connected to each other. The fan 81 forms an air flow on the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83.

Therefore, the fan 81 can suppress the air from staying in the vicinity of the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83, and the first base plate 82 and the first base plate 82 and the first base plate 82 and the second base plate 83 are compared with the case where the fan 81 is not provided. 2 The base plate 83 can be cooled. Further, the first mounting surface 86 is formed on the front surface 82f of the first base plate 82 which is a plate member, and the second mounting surface 91 is formed on the front surface 83f of the second base plate 83 which is a plate member. Therefore, the back surface 82b of the first base plate 82 is inclined with respect to the back surface 83b of the second base plate 83, and the angle formed by the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 is Greater than 180 degrees. Therefore, both of the two back surfaces 82b and 83b are formed as planes perpendicular to the air flow direction between the back surfaces 82b and 83b and the fan 81, and the angle formed by the two back surfaces 82b and 83b is larger than 180. Compared to the case where it is made small, the two back surfaces 82b and 83b are less likely to become resistance to the air flow. Therefore, it is possible to suppress the slowdown of the air flow velocity in the vicinity of the two back surfaces 82b and 83b. Therefore, the fan 81 can cool the first base plate 82 and the second base plate 83 more appropriately.

In the present embodiment as the sixth aspect, the heat sink 80 includes a tubular peripheral wall portion 84 in which a part of the front end is fixed to the first base plate 82 and the second base plate 83, and an internal space of the peripheral wall portion 84. It has a first vent 98a and a second vent 98b that communicate with an external space. The fan 81 forms a flow of air through the opening 84H at the rear end of the peripheral wall portion 84. The first vent 98a and the second vent 98b connect the first base plate 82 and the second base plate 83 in a cross section perpendicular to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. It is arranged on the side opposite to the fan 81 side of the unit 99.

Here, the flow of air passing through the opening 84H of the peripheral wall portion 84 includes the flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H and the flow of air passing through the opening 84H from the internal space of the peripheral wall portion to the outside. It includes the flow of air flowing through the space. When the fan 81 forms a flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H of the peripheral wall portion 84, a part of the air flowing into the internal space of the peripheral wall portion 84 from the opening 84H is a peripheral wall. It faces the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 through the internal space of the portion 84. Then, a part of this air flows out to the external space of the peripheral wall portion 84 through the first vent 98a and the second vent 98b. In this way, the air directed by the fan 81 toward the back surfaces 82b and 83b of the first base plate 82 and the second base plate 83 is suppressed from being diffused by the peripheral wall portion 84 as compared with the case where the peripheral wall portion 84 is not provided. Therefore, the amount of air toward the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 can be increased, and the first base plate 82 and the second base plate 83 can be cooled more appropriately. Further, as described above, the first vent 98a and the second vent 98b are the first base plate 82 and the second vent 98b in the cross section perpendicular to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. 2 It is arranged on the side opposite to the fan 81 side of the connection portion 99 with the base plate 83. Therefore, it is possible to prevent air from staying in the vicinity of the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83, and the first base plate 82 and the second base plate 83 can be cooled more appropriately.

On the other hand, when the fan 81 forms a flow of air flowing from the internal space of the peripheral wall portion 84 to the external space through the opening 84H of the peripheral wall portion 84, the internal space of the peripheral wall portion 84 from the first vent 98a and the second vent 98b. Air flows into. A part of the air flowing in from the first vent 98a and the second vent 98b passes through the internal space of the peripheral wall portion 84 and flows out from the opening 84H of the peripheral wall portion 84 to the external space of the peripheral wall portion 84. Here, as described above, the first vent 98a and the second vent 98b are with the first base plate 82 in a cross section perpendicular to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. It is arranged on the side opposite to the fan 81 side of the connecting portion 99 with the second base plate 83. Therefore, a part of the air flowing in from the first vent 98a and the second vent 98b passes through the vicinity of the back surfaces 82b and 83b of the first base plate 82 and the second base plate 83, and the opening 84H of the peripheral wall portion 84 passes. Head to. That is, the air in the vicinity of the back surfaces 82b and 83b is sucked by the fan 81. Therefore, the fan 81 can suck more air in the vicinity of the back surfaces 82b and 83b than in the case where the peripheral wall portion 84 is not provided. Therefore, it is possible to prevent air from staying in the vicinity of the back surfaces 82b and 83b, and the first base plate 82 and the second base plate 83 can be cooled more appropriately.

In the present embodiment as the sixth aspect, the peripheral wall portion 84 surrounds the outer periphery of the fan 81. Therefore, when the fan 81 forms a flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H of the peripheral wall portion 84, the case where the peripheral wall portion 84 does not surround the outer periphery of the fan 81 is compared with the case where the peripheral wall portion 84 does not surround the outer periphery of the fan 81. The amount of air toward the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 can be increased. On the other hand, when the fan 81 forms a flow of air flowing from the internal space of the peripheral wall portion 84 to the external space through the opening 84H of the peripheral wall portion 84, the fan is compared with the case where the peripheral wall portion 84 does not surround the outer periphery of the fan 81. The 81 can suck a large amount of air in the vicinity of the back surfaces 82b and 83b of the first base plate 82 and the second base plate 83. Therefore, the first base plate 82 and the second base plate 83 can be cooled more appropriately.

In the present embodiment as the sixth aspect, a part of the first substrate 50 overlaps with the first vent 98a in the opening direction of the first vent 98a. Further, in the opening direction of the second vent 98b, a part of the second substrate 60 overlaps with the second vent 98b. Therefore, when the fan 81 forms a flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H of the peripheral wall portion 84, a part of the air flowing out from the first vent 98a is first. One can be directed to the substrate 50, and a part of the air flowing out from the second vent 98b can be directed to the second substrate 60. Therefore, the first substrate 50 and the second substrate 60 can be cooled by the heat sink 80, and can also be directly cooled by the air flowing out from the first vent 98a and the second vent 98b. On the other hand, when the fan 81 forms a flow of air flowing from the internal space of the peripheral wall portion 84 to the external space through the opening 84H of the peripheral wall portion 84, it tries to flow into the internal space of the peripheral wall portion 84 from the first vent 98a. A portion of the air may be allowed to flow along the first substrate 50. Further, a part of the air that is about to flow into the internal space of the peripheral wall portion 84 from the second vent 98b may be allowed to flow along the second substrate 60. Therefore, the first substrate 50 and the second substrate 60 are cooled by the heat sink 80, and also directly by the air trying to flow into the internal space of the peripheral wall portion 84 of the first vent 98a and the second vent 98b. Can be cooled. Therefore, the first substrate 50 and the second substrate 60 can be cooled more appropriately.

In the present embodiment as the sixth aspect, the heat sink 80 has a plurality of straightening vanes 85 extending from the front end side to the rear end side of the peripheral wall portion 84 in the internal space of the peripheral wall portion 84. Therefore, the turbulence of the air flow in the internal space of the peripheral wall portion 84 is adjusted. Therefore, when the fan 81 forms a flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H of the peripheral wall portion 84, the heat sink 80 is different from the case where the heat sink 80 does not have the straightening vane 85. 1 The amount of air toward the back surface 82b of the base plate 82 and the back surface 83b of the second base plate 83 can be increased. On the other hand, when the fan 81 forms a flow of air flowing from the internal space of the peripheral wall portion 84 to the external space through the opening 84H of the peripheral wall portion 84, the fan 81 is compared with the case where the heat sink 80 does not have the straightening vane 85. Can suck a lot of air in the vicinity of the back surfaces 82b and 83b of the first base plate 82 and the second base plate 83. Therefore, the first base plate 82 and the second base plate 83 can be cooled more appropriately by the air sent from the fan 81.

In the present embodiment as the sixth aspect, the straightening vane 85 is connected to the first base plate 82 and the second base plate 83. A member that is connected to the first base plate 82 and the second base plate 83 after a part of the heat of the first substrate 50 and the second substrate 60 is transferred to the first base plate 82 and the second base plate 83. For example, it is dispersed in the peripheral wall portion 84 and the like. In the present embodiment, since the straightening vane 85 is connected to the first base plate 82 and the second base plate 83 as described above, heat can be dispersed to the straightening vane 85 as well, and the first base plate 82 and the second base plate 83 can be dispersed. 2 The base plate 83 can be cooled more appropriately.

As described above, the straightening vane 85 extends from the front end side to the rear end side of the peripheral wall portion 84 in the internal space of the peripheral wall portion 84. Therefore, in the internal space of the peripheral wall portion 84, a space sandwiched between the peripheral wall portion 84 and the straightening vane 85 can be formed. Further, since the heat sink 80 has a plurality of straightening vanes 85, a space sandwiched by the plurality of straightening vanes 85 can be formed. In the present embodiment, as described above, the straightening vane 85 crosses the first vent 98a when viewed from the opening direction of the first vent 98a, and the second vent when viewed from the opening direction of the second vent 98b. Cross mouth 98b. Therefore, any of the above spaces that can be formed in the internal space of the peripheral wall portion 84 communicate with the first vent 98a and the second vent 98b. Therefore, it is possible to prevent air from staying in the internal space of the peripheral wall portion 84, and the first base plate 82 and the second base plate 83 can be cooled more appropriately.

In the present embodiment as the sixth aspect, at least one of the straightening vanes 85 has a protruding portion 85a protruding from the second vent 98b into the external space of the peripheral wall portion 84. The protruding portion 85a comes into contact with the second substrate 60 that overlaps with the second vent 98b when viewed from the opening direction of the second vent 98b. Therefore, the protruding portion 85a also serves as a part of the second mounting surface 91, and the area of the second mounting surface 91 increases as compared with the case where the protruding portion 85a also serves as a part of the second mounting surface 91. To do. Therefore, the second substrate 60 can be placed more stably. Further, since the straightening vane 85 extends in the internal space of the peripheral wall portion 84 as described above, it is cooled by the air flowing through the internal space of the peripheral wall portion 84 by the fan 81. Since the protrusion 85a of the straightening vane 85 to be cooled in this way comes into contact with the second substrate 60, the second substrate 60 with which the straightening vane 85 comes into contact can be cooled more appropriately. Further, since the protruding portion 85a of the straightening vane 85 protrudes from the second vent 98b to the external space of the peripheral wall portion 84, the turbulence of the air flow in the vicinity of the second vent 98b is adjusted by the protruding portion 85a. Therefore, air can be more appropriately flowed out from the second vent 98b to the external space of the peripheral wall portion 84, or flowed from the second vent 98b into the internal space of the peripheral wall portion 84. Therefore, the second substrate 60 can be cooled more appropriately.

In the present embodiment as the sixth aspect, the connection portion 99 between the first base plate 82 and the second base plate 83 in the cross section perpendicular to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. A first vent 98a arranged on the side of the first base plate 82 and a second vent 98b arranged on the side of the second base plate 83 are formed. Therefore, when the fan 81 forms a flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H of the peripheral wall portion 84, the air in the vicinity of the first base plate 82 and the second base plate 83 Among them, a part of the air on the first base plate 82 side can flow out to the external space of the peripheral wall portion 84 from the first vent 98a arranged on the first base plate 82 side. Further, a part of the air on the second base plate 83 side can flow out to the external space of the peripheral wall portion 84 from the second vent 98b arranged on the second base plate 83 side. Therefore, air can be more appropriately flowed out to the external space of the peripheral wall portion 84, and the first base plate 82 and the first base plate 82 and the first vent are as compared with the case where the vent is the first vent 98a or the second vent 98b. 2 The base plate 83 can be cooled more appropriately. On the other hand, when the fan 81 forms a flow of air flowing from the external space of the peripheral wall portion 84 to the internal space through the opening 84H of the peripheral wall portion 84, the air flowing into the internal space of the peripheral wall portion 84 from the first vent 98a A portion may be allowed to flow along the back surface 82b of the first base plate 82. Further, a part of the air flowing from the second vent 98b into the internal space of the peripheral wall portion 84 may be allowed to flow along the back surface 83b of the second base plate 83. Therefore, it is possible to appropriately suppress the air from staying in the vicinity of the back surfaces 82b and 83b of the first base plate 82 and the second base plate 83, and the vent is the first vent 98a or the second vent 98b. The first base plate 82 and the second base plate 83 can be cooled more appropriately.

(Second Embodiment)
Next, a second embodiment as the first aspect of the present invention will be described in detail with reference to FIG. Of the components of the lamp of the present embodiment, the same or equivalent components as those of the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 23 is a diagram showing the light source unit according to the second embodiment of the present invention in the same manner as in FIG. As shown in FIG. 23, in the light source unit LU of the present embodiment, the heat sink 80 does not have the first base plate 82, the second base plate 83, the peripheral wall portion 84, and the straightening vane 85, and is a solid body. It is different from the light source unit LU of the first embodiment in that the fan 81 is not provided. Further, in the light source unit LU of the present embodiment, the first mounting surface 86 and the second mounting surface 91 are substantially parallel to each other, and the flow member recess 96 is the first flow member recess 96a and the second. It is also different from the light source unit LU of the first embodiment in that it includes a recess 96b for a flow member. In FIG. 23, the description of the support plate 30, the reflector unit 40, the connector 64, and the like is omitted.

The heat sink 80 of the present embodiment is formed by filling the internal space of the peripheral wall portion 84 of the first embodiment with a material forming the heat sink 80. The front surface of the heat sink 80 includes a first surface 80sa, a second surface 80sb, and a third surface 80sc. The first surface 80sa is a substantially vertical surface, the second surface 80sb is a substantially vertical surface, and is located below the first surface 80sa and in front of the first mounting surface 86. The first surface 80sa and the second surface 80sb are substantially parallel to each other. The third surface 80sc is a substantially horizontal surface and is located between the first surface 80sa and the second surface 80sb. The lower end of the first surface 80sa and the upper end of the second surface 80sb are connected to the third surface 80sc. That is, the first surface 80sa and the second surface 80sb are connected to each other by the third surface 80sc. The first surface 80sa may be inclined with respect to the second surface 80sb. Further, the third surface 80sc is not particularly limited as long as the first surface 80sa and the second surface 80sb are connected.

A pedestal 90 projecting forward is formed on the first surface 80sa. The end surface of the pedestal 90 is substantially parallel to the first surface 80sa, and this end surface is referred to as the first mounting surface 86. A pedestal 95 projecting forward is formed on the second surface 80sb. The end surface of the pedestal 95 is substantially parallel to the second surface 80sb, and this end surface is referred to as the second mounting surface 91. Therefore, the first mounting surface 86 and the second mounting surface 91 are generally vertical surfaces, and the first mounting surface 86 and the second mounting surface 91 are substantially parallel to each other. The first mounting surface 86 may be inclined with respect to the second mounting surface 91.

In the present embodiment, the first substrate 50 is mounted on the first mounting surface 86, and the second substrate 60 is mounted on the second mounting surface 91, as in the first embodiment. Grease 24 as a flow member is interposed between the first substrate 50 and the first mounting surface 86 and between the second substrate 60 and the second mounting surface 91, respectively. When the first mounting surface 86 is viewed in a plan view, the outer edge of the first mounting surface 86 is surrounded by the outer edge of the first substrate 50. When the second mounting surface 91 is viewed in a plan view, the outer edge of the second mounting surface 91 is surrounded by the outer edge of the second substrate 60. Therefore, of the outer edges of the first mounting surface 86, the outer edge 86e on the second mounting surface 91 side is the edge on the first mounting surface 86 on the second substrate 60 side of the region overlapping the first substrate 50. The outer edge 91e located on the first mounting surface 86 side of the outer edge of the second mounting surface 91 is the edge on the first substrate 50 side of the region of the second mounting surface 91 that overlaps with the second substrate 60.

Between the edge of the first mounting surface 86 on the second substrate 60 side of the region overlapping the first substrate 50 and the edge of the second mounting surface 91 overlapping the second substrate 60 on the first substrate 50 side. , The recess 96 for the flow member is formed. The flow member recess 96 includes a first flow member recess 96a and a second flow member recess 96b. The recess 96a for the first flow member is formed on the first surface 80sa and is recessed on the side opposite to the first substrate 50 side with respect to the first mounting surface 86. The recess 96b for the second flow member is formed on the second surface 80sb, and is recessed on the side opposite to the second substrate 60 side from the second mounting surface 91. Therefore, the recess 96a for the first flow member is located closer to the first substrate 50 than the recess 96b for the second flow member, and the recess 96b for the second flow member is closer to the second substrate 60 than the recess 96a for the first flow member. It is located on the side. The recess 96a for the first flow member extends for a predetermined length substantially parallel to the outer edge 86e on the second mounting surface 91 side of the outer edge of the first mounting surface 86. The recess 96b for the second flow member extends to a predetermined length substantially parallel to the outer edge 91e located on the first mounting surface 86 side of the outer edge of the second mounting surface 91. The shapes of the first flow member recess 96a and the second flow member recess 96b in the vertical cross section are substantially rectangular. The shapes of the first flow member recess 96a and the second flow member recess 96b in the vertical cross section are not particularly limited.

As described above, in the present embodiment as the first aspect, the heat sink 80 has an edge on the second substrate 60 side and a second mounting surface in a region of the first mounting surface 86 that overlaps with the first substrate 50. A recess 96a for a first flow member and a recess 96b for a second flow member are provided between the edge of the area 91 of 91 that overlaps with the second substrate 60 on the side of the first substrate 50. Further, the recess 96a for the first flow member is located closer to the first substrate 50 than the recess 96b for the second flow member, and the recess 96b for the second flow member is closer to the second substrate 60 than the recess 96a for the first flow member. Is located in. Therefore, of the excess grease 24 extruded from between the first substrate 50 and the first mounting surface 86, a part of the grease 24 toward the second substrate 60 side is housed in the first flow member recess 96a. obtain. Further, a part of the excess grease 24 extruded from between the second substrate 60 and the second mounting surface 91 toward the first substrate 50 side can be accommodated in the second flow member recess 96b. .. Further, a part of the excess grease 24 that goes beyond the second flow member recess 96b and faces the first substrate 50 side can be accommodated in the first flow member recess 96a. Therefore, a part of the excess grease 24 accumulated between the first substrate 50 and the second substrate 60 is on the surface of the first substrate 50 opposite to the first mounting surface 86 side or on the surface of the second substrate 60. 2 Adhesion to the surface opposite to the mounting surface 91 side can be suppressed. Therefore, it is possible to prevent the excess grease 24 from adhering to the light emitting element 55 mounted on the first substrate 50 and the light emitting element 63 mounted on the second substrate 60.

Further, in the light source unit LU of the present embodiment as the first aspect, a surplus accumulated between the first substrate 50 and the second substrate 60 is compared with the case where the recess 96 for the flow member is composed of one recess. Prevents a part of the grease 24 from adhering to the surface of the first substrate 50 opposite to the first mounting surface 86 side and the surface of the second substrate 60 opposite to the second mounting surface 91 side. Can be done.

Further, the pedestal 95 whose end surface is the second mounting surface 91 is formed on the second surface 80sb located below the first surface 80sa and in front of the first mounting surface 86, and is formed with the first surface 80sa. The third surface 80sc is located between the second surface 80sb and the second surface 80sb. Therefore, it is possible to prevent the excess grease 24 that goes beyond the recess 96a for the first flow member and goes toward the second substrate 60 side toward the second surface 80sb by the third surface 80sc. Therefore, it is possible to prevent a part of the excess grease 24 that goes beyond the recess 96a for the first flow member and heads toward the second substrate 60 from adhering to the light emitting element 63 mounted on the second substrate 60. Further, although the second surface 80sb is located in front of the first substrate 50, the second surface 80sb is formed with a recess 96b for a second flow member. Therefore, it is possible to prevent the excess grease 24 from flying and adhering from the second surface 80sb onto the surface of the first substrate 50 opposite to the first mounting surface 86 side.

(Third Embodiment)
Next, a third embodiment as a sixth aspect of the present invention will be described in detail with reference to FIG. 24. Of the components of the lamp of the present embodiment, the same or equivalent components as those of the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 24 is a diagram showing the light source unit according to the third embodiment of the present invention in the same manner as in FIG. As shown in FIG. 24, the light source unit LU of the present embodiment is different from the light source unit LU of the first embodiment in that the first vent 98a and the second vent 98b are formed on the peripheral wall portion 84 of the heat sink 80. different.

The front end of the peripheral wall portion 84 in the heat sink 80 of the present embodiment is fixed to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 over the entire circumference. Specifically, the outer edge of the peripheral wall portion 84 on the front side of the upper wall 84b is connected to the back surface 82b of the first base plate 82, and the front outer edge of the lower wall 84c is connected to the back surface 83b of the second base plate 83. .. The first vent 98a is a through hole that penetrates the upper wall 84b in the plate thickness direction, and the second vent 98b is a through hole that penetrates the lower wall 84c in the plate thickness direction. Therefore, the first vent 98a is arranged closer to the first base plate 82 than the connection portion 99 between the first base plate 82 and the second base plate 83, and the second vent 98b is second than the connection portion 99. It is arranged on the base plate 83 side. Further, a part of the first vent 98a and a part of the first vent 98a are located on the side opposite to the fan 81 from the connection portion 99.

In the present embodiment as the sixth aspect, the front end of the peripheral wall portion 84 of the heat sink 80 is fixed to the first base plate 82 and the second base plate 83. However, at least a part of the first vent 98a and the second vent 98b has the first base plate 82 and the second in the cross section perpendicular to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. It is arranged on the side opposite to the fan 81 side of the connection portion 99 with the base plate 83. Therefore, it is possible to prevent air from staying in the vicinity of the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83, and the first base plate 82 and the second base plate 83 can be cooled more appropriately. it can. A plurality of the first vents 98a and the second vents 98b may be formed, or may be formed on the side wall 84a. When formed on the side wall 84a, at least a part of the first vent 98a and the second vent 98b is arranged on the side of the connecting portion 99 opposite to the fan 81 side of the portion connected to the side wall 84a. Is preferable. With this configuration, it is possible to prevent air from staying in the vicinity of the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83.

(Fourth Embodiment)
Next, a fourth embodiment as a sixth aspect of the present invention will be described in detail with reference to FIG. Of the components of the lamp of the present embodiment, the same or equivalent components as those of the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 25 is a diagram showing a light source unit according to a fourth embodiment of the present invention in the same manner as in FIG. As shown in FIG. 25, the light source unit LU of the present embodiment is different from the light source unit LU of the first embodiment in that the first base plate 82 is a plate-like body extending obliquely upward and to the left and right. In FIG. 25, the description of the straightening vane 85, the support plate 30, the reflector unit 40, the connector 64, and the like is omitted.

The first base plate 82 of the present embodiment is a plate-like body extending diagonally upward and left and right behind. However, as in the first embodiment and the third embodiment, the normal extending toward the first substrate 50 side of the first mounting surface 86 is the normal extending toward the second substrate 60 side of the second mounting surface 91. Intersect with. Therefore, the back surface 82b of the first base plate 82 is inclined with respect to the back surface 83b of the second base plate 83, and the angle formed by the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 is 180 degrees. Will be greater than. Therefore, both of these two back surfaces 82b and 83b are formed as planes perpendicular to the air flow direction between the back surfaces 82b and 83b and the fan 81, and the angle formed by the two back surfaces 82b and 83b is 180 degrees. These back surfaces 82b and 83b are less likely to be resistance to air flow than in the case where they are made smaller than. Therefore, it is possible to suppress the slowdown of air in the vicinity of the back surfaces 82b and 83b. Therefore, the fan 81 can cool the first base plate 82 and the second base plate 83 more appropriately.

(Fifth Embodiment)
Next, a fifth embodiment as a sixth aspect of the present invention will be described in detail with reference to FIG. Of the components of the lamp of the present embodiment, the same or equivalent components as those of the first embodiment are designated by the same reference numerals and duplicated description will be omitted unless otherwise specified.

FIG. 26 is a diagram showing a light source unit according to a fifth embodiment of the present invention in the same manner as in FIG. As shown in FIG. 26, in the light source unit LU of the present embodiment, the heat sink 80 does not have the first base plate 82, the second base plate 83, the peripheral wall portion 84, and the straightening vane 85, and is a solid body. It is different from the light source unit LU of the first embodiment in that the fan 81 is not provided. In FIG. 26, the description of the support plate 30, the reflector unit 40, the connector 64, and the like is omitted.

The heat sink 80 of the present embodiment is formed by filling the internal space of the peripheral wall portion 84 of the first embodiment with a material forming the heat sink 80. However, the normal extending toward the first substrate side of the first mounting surface 86 on the heat sink 80 intersects with the normal extending toward the second substrate 60 side of the second mounting surface 91. Therefore, in the same manner as in the first embodiment, the first light emission mounted on the first substrate 50 is compared with the case where the first mounting surface 86 and the second mounting surface 91 are located on the same plane. The distance between the element 55 and the second light emitting element 63 mounted on the second substrate 60 can be shortened. Further, the distance between the first light emitting element 55 and the second light emitting element 63 along the surface of the heat sink 80 can be increased. Therefore, the heat generated by the first light emitting element 55 and the second light emitting element 63 can be more appropriately dispersed in the heat sink 80. Therefore, it is possible to prevent the region between the first light emitting element 55 and the second light emitting element 63 of the heat sink 80 from being overheated. Further, the distance between the first light emitting element 55 and the second light emitting element 63 can be shortened as compared with the case where the first mounting surface 86 and the second mounting surface 91 are located on the same plane, and the size is small. Can be transformed.

Although the first to sixth aspects of the present invention have been described above by exemplifying embodiments, the first to sixth aspects of the present invention are not limited thereto.

For example, in the first embodiment, the first substrate 50, which is pressed against the first mounting surface 86 of the heat sink 80 by the reflector unit 40 and fixed to the heat sink 80, has been described as an example. However, the first substrate 50 may be fixed to the heat sink 80, and for example, the first substrate 50 may be fixed to the heat sink 80 with screws or the like.

Further, in the first embodiment, the second substrate 60, which is pressed against the second mounting surface 91 of the heat sink 80 by the support plate 30 and fixed to the heat sink 80, has been described as an example. However, the second substrate 60 may be fixed to the heat sink 80. For example, except for the case of the light source unit of the fifth aspect, the second substrate 60 may be fixed to the heat sink 80 with screws or the like.

Further, in the first embodiment, the first substrate with respect to the heat sink 80 is used by using the through hole 51 and the side surface of the first substrate 50, the first rib 87 of the heat sink 80, the two bosses 88, and the two protrusions 97. The position of 50 was regulated to be within a predetermined range. However, the means for regulating the position of the first substrate 50 with respect to the heat sink 80 is not particularly limited. Further, in the first embodiment, the position of the second substrate 60 with respect to the heat sink 80 is determined by using the through hole 61 and the side surface of the second substrate 60 and the second rib 92 and the two protrusions 94 of the heat sink 80. It was regulated to be within the range. However, the means for restricting the position of the second substrate 60 with respect to the heat sink 80 is not particularly limited.

Further, in the first embodiment, the first substrate 50 on which the plurality of first light emitting elements 55 and the thermistor 56 are mounted, and the second substrate 60 on which the plurality of second light emitting elements 63 and the connector 64 are mounted are taken as examples. explained. However, the first substrate 50 and the second substrate 60 may each be equipped with at least one light emitting element. Further, in the first embodiment, the first substrate 50 and the second substrate 60 are connected by a flexible printed circuit board 70. However, except for the case of the light source unit of the second aspect, the first substrate 50 and the second substrate 60 may not be connected by the flexible printed circuit board 70. In such a case, for example, a connector may be mounted on the first substrate 50, and power may be supplied to the first light emitting element 55 via the connector.

Further, in the first embodiment, the first light emitting element 55 is located closer to the second substrate 60 than to the first substrate 50 side of the first substrate 50. Further, the second light emitting element 63 was located on the first substrate 50 side of the second substrate 60 with respect to the second substrate 60 side. However, the position of the first light emitting element 55 with respect to the first substrate 50 and the position of the second light emitting element 63 with respect to the second substrate 60 are not particularly limited. When the first light emitting element 55 is located on the second substrate 60 side of the first substrate 50 with respect to the first substrate 50 side as in the first embodiment, the first substrate 50 and the first substrate 50 are located. A part of the excess grease 24 accumulated between the two substrates 60 is likely to adhere to the first light emitting element 55. Further, when the second light emitting element 63 is located on the first substrate 50 side of the second substrate 60 with respect to the second substrate 60 side, the surplus accumulated between the first substrate 50 and the second substrate 60. A part of the grease 24 of the above is likely to adhere to the first light emitting element 55. Therefore, in the first and second embodiments, at least one of the light emitting elements of the first substrate 50 and the second substrate 60 is on the other substrate side of the one substrate on which the light emitting element is mounted rather than the one substrate side. It is useful when it is located in.

Further, in the first embodiment, the angle formed by the first mounting surface 86 and the second mounting surface 91 is smaller than 180 degrees, and in the second embodiment, the first mounting surface 86 and the second mounting surface 86 are formed. 2 The mounting surface 91 was made substantially parallel to each other. However, the angle formed by the first mounting surface 86 and the second mounting surface 91 may be larger than 180 degrees. When the angle formed by the first mounting surface 86 and the second mounting surface 91 is smaller than 180 degrees as in the first embodiment, the first mounting surface 86 and the second mounting surface 86 are formed. Excess grease 24 tends to accumulate between the 91 and the first substrate 50, that is, between the first substrate 50 and the second substrate 60. Therefore, the first and second embodiments are useful when the angle formed by the first mounting surface 86 and the second mounting surface 91 is smaller than 180 degrees.

Further, in the present embodiment, a part of the recess 96 for the flow member passes through one end of the first light emitting element 55 of the first substrate 50 in a direction perpendicular to the direction from the first substrate 50 side to the second substrate 60 side. It was located between the first straight line Lf parallel to the direction from the first substrate 50 side to the second substrate 60 side and the second straight line Ls passing through the other end and parallel to the first straight line Lf. Further, a part of the recess 96 for the flow member passes through one end of the second light emitting element 63 of the second board 60 in a direction perpendicular to the direction from the first board 50 side to the second board 60 side and is on the first board 50 side. It was located between a straight line parallel to the direction from to the second substrate 60 side and another straight line passing through the other end and parallel to this straight line. However, the recess 96 for the flow member is the first substrate in the region of the first mounting surface 86 that overlaps with the first substrate 50 and the edge of the region of the second mounting surface 91 that overlaps with the second substrate 60. It is not particularly limited as long as it is located between the edge on the 50 side. From the viewpoint of suppressing the adhesion of the excess flow member to the light emitting element, a part of the recess 96 for the flow member is the first substrate in at least one of the light emitting elements 55 and 63 of the first substrate 50 and the second substrate 60. A first straight line passing through one end in a direction perpendicular to the direction from the 50 side to the second board 60 side and parallel to the direction from the first board 50 side to the second board 60 side, and the first straight line passing through the other end. It is preferably located between the parallel second straight line.

Further, in the above embodiment, a part of the first substrate 50 is mounted on the first mounting surface 86, and a part of the second substrate 60 is mounted on the second mounting surface 91. However, except for the case of the light source unit of the third aspect, the method of manufacturing the mounting member of the fourth aspect, and the light source unit of the fifth aspect, the heat sink 80 is formed by at least a part of the first substrate 50. It is not particularly limited as long as it has a first mounting surface on which it is mounted and a second mounting surface on which at least a part of the second substrate 60 is mounted. For example, the entire first substrate 50 may be mounted on the first mounting surface. Further, the heat sink 80 may be further mounted with a substrate different from the first substrate 50 and the second substrate 60. Further, the heat sink 80 is not particularly limited as long as the substrate can be mounted. For example, the heat sink 80 may be a member that does not have a function of cooling the mounted substrate, for example, a simple resin plate member or the like.

Further, in the first embodiment, the flexible printed circuit board 70 passing through the region on the first mounting surface 86 side of the first connection portion 71 between the first substrate 50 and the second substrate 60 will be described as an example. did. However, the flexible printed circuit board 70 may pass through at least one of the region on the first mounting surface 86 side of the first connecting portion 71 and the region on the second mounting surface 91 side of the second connecting portion 72. For example, the flexible printed circuit board 70 may pass through a region on the first mounting surface 86 side of the first connecting portion 71 and a region on the second mounting surface 91 side of the second connecting portion 72.

Further, in the first embodiment, the first substrate 50 is formed with a notch 54 extending from the outer edge on the second substrate 60 side to a predetermined position when the first substrate 50 is viewed in a plan view. However, at least one of the first substrate 50 and the second substrate 60 is formed with a notch extending from the outer edge of the other substrate side to a predetermined position when the one substrate is viewed in a plan view, and the flexible printed circuit board is formed. 70 should pass through this notch. For example, such a notch may be formed in the second substrate 60.

Further, in the first embodiment, the heat sink 80 has a recess 89 between the first substrate 50 and the second substrate 60, which is recessed on the side opposite to the flexible printed circuit board 70 side of the first mounting surface 86. Was. However, the heat sink 80 is recessed between the first substrate 50 and the second substrate 60 on the side opposite to the flexible printed circuit board 70 side of at least one of the first mounting surface 86 and the second mounting surface 91. It suffices to have. For example, the heat sink 80 may have a recess between the first substrate 50 and the second substrate 60 that is recessed on the side opposite to the flexible printed circuit board 70 side of the second mounting surface 91.

Further, in the first embodiment, the light source unit LU including the two flexible printed circuit boards 70 has been described as an example. However, the number of flexible printed circuit boards 70 included in the light source unit LU is not particularly limited.

Further, in the first embodiment, the flexible printed circuit board 70 has a power supply wiring 74c and a thermistor wiring 75c extending from the first connection portion 71 to the second connection portion 72. However, the wiring included in the flexible printed circuit board 70 is not limited to the power supply wiring 74c and the thermistor wiring 75c. For example, the flexible printed circuit board 70 may have other wiring extending from the first connection portion 71 to the second connection portion 72. When the flexible printed circuit board 70 has a plurality of wirings extending from the first connection portion 71 to the second connection portion 72 as described above, it is preferable that slits are formed between the wirings adjacent to each other. With this configuration, as compared with the case where slits are not formed between these wirings as described above, even if migration occurs in the wirings, it is possible to reduce the occurrence of defects due to short circuits.

Further, in the first embodiment, the angle formed by the first mounting surface 86 and the second mounting surface 91 is set to be smaller than 180 degrees. However, in the case of the light source unit of the third aspect, the first mounting surface 86 and the second mounting surface 91 may be non-parallel to each other, for example, the first mounting surface 86 and the second mounting surface 86 and the second mounting surface 91. The angle formed by the surface 91 may be larger than 180 degrees.

Further, in the first embodiment, the first contact surface 51s on the first substrate 50 is a plane substantially parallel to the extending direction of the first rib 87 when the first mounting surface 86 is viewed in a plane. It was. However, the first contact surface 51s may be in contact with the outer peripheral surface of the first rib 87, and may be curved convexly toward the first rib 87 side, for example. Further, the first contact surface 61s on the second substrate 60 is a plane substantially parallel to the extending direction of the second rib 92 when the second mounting surface 91 is viewed in a plane. However, the first contact surface 61s may be in contact with the outer peripheral surface of the second rib 92, and may be curved convexly toward the second rib 92 side, for example.

Further, in the first embodiment, the shape of the cross section perpendicular to the longitudinal direction of the first rib 87 is circular, and the shape of the cross section perpendicular to the longitudinal direction of the second rib 92 is circular. However, the shape of the cross section perpendicular to the longitudinal direction of each of the first rib 87 and the second rib 92 is not particularly limited, and may be, for example, an elliptical shape.

Further, in the first embodiment, the heat sink 80 in which the two contact surfaces 88s, the two contact surfaces 94s, and the two contact surfaces 97s are formed has been described as an example. However, the number of these contact surfaces is not particularly limited.

Further, in the first embodiment, the second contact surface 52s of the first substrate 50 and the contact surface 97s of the heat sink 80 face each other in a substantially parallel state. However, the tangent line between the second contact surface 52s and the contact surface 97s when the first mounting surface 86 is viewed in a plan view may be non-parallel to the extending direction of the first rib 87. For example, the second contact surface 52s may be curved convexly toward the contact surface 97s, and the contact surface 97s may be curved convexly toward the second contact surface 52s.

Further, in the first embodiment, the third contact surface 53s of the first substrate 50 and the contact surface 88s of the heat sink 80 face each other in a substantially parallel state. However, the tangent line between the third contact surface 53s and the contact surface 88s when the first mounting surface 86 is viewed in a plan view may be non-parallel to the extending direction of the first rib 87. For example, the third contact surface 53s may be curved convexly toward the contact surface 88s, and the contact surface 88s may be curved convexly toward the third contact surface 53s.

Further, in the first embodiment, the second contact surface 62s of the second substrate 60 and the contact surface 94s of the heat sink 80 face each other in a substantially parallel state. However, the tangent line between the second contact surface 62s and the contact surface 94s when the second mounting surface 91 is viewed in a plan view may be non-parallel to the extending direction of the second rib 92. For example, the second contact surface 62s may be curved convexly toward the contact surface 94s, and the contact surface 94s may be curved convexly toward the second contact surface 62s.

Further, in the above embodiment, the heat sink 80 on which the first substrate 50 and the second substrate 60 are mounted has been described as an example. However, except for the case of the light source unit of the first aspect, the light source unit of the second aspect, and the light source unit of the sixth aspect, the heat sink 80 is provided on which at least one substrate is mounted. good. For example, the second substrate 60 may not be mounted on the heat sink 80. Further, the heat sink 80 is not particularly limited as long as the substrate can be mounted. For example, the heat sink 80 may be a member that does not have a function of cooling the mounted substrate, for example, a simple resin plate member or the like.

Further, in the first embodiment of the method for manufacturing a heat sink, the intermediate member 80i has a first temporary mounting surface 86p, a second temporary mounting surface 91p, a first temporary contact surface 88sp, and a second temporary contact surface. The configuration was different from that of the heat sink 80 described above in that it had 94 sp. However, the intermediate member 80i may further have another temporary contact surface that covers the contact surface 97s of the protrusion 97. In the case of such a configuration, for example, in the cutting step P2, this other temporary contact surface is further cut to form the contact surface 97s. At this time, a part of the first mounting surface 86 and a part of the contact surface 97s may be formed at the same time.

Further, in the first embodiment, the support plate 30 having the base portion 31, the pair of fixing portions 32, the pair of first light-shielding portions 33, the second light-shielding portion 34, and the third light-shielding portion 35 has been described as an example. However, the support plate 30 comes into contact with at least the contact portion 31b on the mounting surface 60s on which the second light emitting element 63 is mounted on the second substrate 60, and the second substrate 60 is brought into contact with the second mounting surface 91 and the contact surface 94s. It is not particularly limited as long as it is pressed against. For example, the support plate 30 does not have to have at least one of a pair of the first light-shielding portion 33, the second light-shielding portion 34, and the third light-shielding portion 35. Further, the support plate 30 has a configuration in which the second substrate 60 is pressed against the second mounting surface 91 and the protrusion 94 from the side opposite to the second mounting surface 91 side of the second substrate 60 by the elastic force of an elastic body such as a spring. May be done.

Further, in the first embodiment, the grease 24 as a flow member is interposed between the second substrate 60 and the second mounting surface 91. However, except for the case of the light source unit of the first aspect, the flow member may not be interposed between the second substrate 60 and the second mounting surface 91.

Further, in the first embodiment, the two contact surfaces 94s formed on the lower side of the two protrusions 94 have been described as an example. However, the contact surface 94s is not particularly limited as long as a part of the side surface of the second substrate 60 is pressed by the support plate 30. For example, the contact surface 94s on which a part of the side surface of the second substrate 60 is pressed by the support plate 30 may be one, three or more, and may not be flat.

Further, in the first embodiment, when the second substrate 60 is viewed in a plan view, the support plate 30 makes the second substrate 60 a contact surface 94s rather than the contact portion 31b in the second substrate 60. It was located in the direction of the pressing force. However, the contact surface 94s is located in a direction opposite to the direction of the force with which the support plate 30 presses the second substrate 60 against the contact surface 94s with respect to the contact portion 31b when the second substrate 60 is viewed in a plan view. Is also good.

Further, in the first embodiment, at least a part of the contact surface 94s in one of the protrusions 94 is a force that the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. It was located between a straight line La passing through one end of the contact portion 31b in a direction parallel to the direction of F2 and perpendicular to the direction, and another straight line Lb parallel to the straight line La and passing through the other end of the contact portion 31b. .. Further, at least a part of the contact surface 94s of the other protrusion 94 is parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. It was located between a straight line Lc passing through one end of the contact portion 31b in a direction perpendicular to the direction and another straight line Ld parallel to the straight line La and passing through the other end of the contact portion 31b. However, these contact surfaces 94s do not have to be located between the straight lines La and Lc and the straight lines Lb and Ld, respectively. For example, as in the first embodiment, when the second substrate 60 has two contact portions 31b, at least a part of the contact surface 94s is the support plate 30 when the second substrate 60 is viewed in a plan view. 2 A straight line Lb that passes through the end of one contact portion 31b on the other contact portion 31b side in parallel with the direction of the force F2 that presses the substrate 60 against the contact surface 94s, and one in the other contact portion 31b that is parallel to the straight line Lb. It may be located between the other straight line Ld passing through the end on the contact portion 31b side of the above. With such a configuration, even if at least a part of the contact surface 94s is not located between the straight lines La and Lc and the straight lines Lb and Ld, the support plate 30 hits the second substrate 60. It can be properly pressed against the contact surface 94s.

Further, in the first embodiment, the second substrate 60 has two contact portions 31b, and the center of gravity 60G of the second substrate 60 is such that the support plate 30 is the second substrate 60 when the second substrate 60 is viewed in a plan view. A straight line La that is parallel to the direction of the force F2 that presses the contact surface 94s and passes through the end opposite to the other contact portion 31b side in one contact portion 31b, and one in the other contact portion 31b that is parallel to the straight line La. It was located between the contact portion 31b side and another straight line Lc passing through the opposite end. However, the center of gravity 60G of the second substrate 60 does not have to be located between the straight line La and the straight line Lc. In the first embodiment, the center of gravity 60G of the second substrate 60 is parallel to the direction of the force F2 at which the support plate 30 presses the second substrate 60 against the contact surface 94s when the second substrate 60 is viewed in a plan view. Between a straight line Lb passing through the end of one contact portion 31b on the other contact portion 31b side and another straight line Ld parallel to the straight line Lb and passing through the end of one contact portion 31b on the other contact portion 31b. Is also located. Therefore, even when the light source unit LU vibrates, it is possible to more appropriately prevent the second substrate 60 from floating from the second mounting surface 91.

Further, in the first embodiment, the second substrate 60 having two contact portions 31b has been described as an example. However, the number of contact portions 31b is not particularly limited, and the number of contact portions 31b may be one or three or more. When the second substrate 60 has one contact portion 31b and the heat sink 80 has two contact surfaces 94s, the support plate 30 contacts the second substrate 60 when the second substrate 60 is viewed in a plan view. It is preferable that the straight line passing through the contact portion 31b parallel to the direction of the force F2 pressing against the 94s passes between the two contact surfaces 94s. With this configuration, even if at least a part of the contact surface 94s is not located between the straight line La and the straight line Lb, the support plate 30 makes the second substrate 60 suitable for the contact surface 94s. Can be pressed against.

Further, in the first embodiment, the peripheral wall portion 84 surrounding the outer periphery of the fan 81 has been described as an example. However, the peripheral wall portion 84 does not have to surround the outer periphery of the fan 81. In such a case, for example, the fan 81 is arranged behind the opening 84H at the rear end of the peripheral wall portion 84, and air may flow into the internal space of the peripheral wall portion 84 from the opening 84H, or the peripheral wall portion 84 may flow from the opening 84H. It causes air to flow out into the external space of.

Further, in the first embodiment, the straightening vane 85 whose front outer edge is connected to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83 has been described as an example. However, the straightening vane 85 may extend from one end side of the peripheral wall portion 84 toward the other end side in the internal space of the peripheral wall portion 84. For example, the front outer edge of the straightening vane 85 does not have to be connected to the back surface 82b of the first base plate 82 and the back surface 83b of the second base plate 83. Further, the straightening vane 85 does not have to have a protruding portion 85a protruding from the second vent 98b into the external space of the peripheral wall portion 84. The straightening vane 85 may have another protruding portion that protrudes from the first vent 98a into the external space of the peripheral wall portion 84 and comes into contact with the first substrate 50. Further, the straightening vane 85 does not have to cross the first vent 98a when viewed from the front, which is the opening direction of the first vent 98a, and when viewed from the front, which is the opening direction of the second vent 98b. It is not necessary to cross the second vent 98b. Further, the heat sink 80 does not have to have the straightening vane 85, and may not have the peripheral wall portion 84.

Further, in the first embodiment, a part of the first substrate 50 overlaps with the first vent 98a in the opening direction of the first vent 98a, and a part of the second vent is in the opening direction of the second vent 98b. The second substrate 60 that overlaps with 98b has been described as an example. However, the first substrate 50 does not have to overlap the first vent 98a in the opening direction of the first vent 98a, and the second substrate 60 overlaps the second vent 98b in the opening direction of the second vent 98b. It doesn't have to be.

Further, in the first embodiment, the third embodiment, and the fourth embodiment, the heat sink 80 has a first vent 98a and a second vent 98b. However, when the heat sink 80 has the peripheral wall portion 84, the heat sink 80 communicates the internal space and the external space of the peripheral wall portion 84, and the fan 81 is more than the connecting portion 99 of the first base plate 82 and the second base plate 83. It suffices to have a vent arranged on the opposite side to the side. For example, in the fourth embodiment, the heat sink 80 does not have to have the first vent 98a, and even with such a configuration, the back surface 82b of the first base plate 82 and the back surface of the second base plate 83 It is possible to prevent air from staying in the vicinity of 83b.

Further, in the first embodiment, the fan 81 passes through the opening 84H of the peripheral wall portion 84 and flows from the external space of the peripheral wall portion 84 to the internal space, or passes through the opening 84H of the peripheral wall portion 84 and is inside the peripheral wall portion 84. The flow of air flowing from the space to the external space could be formed. Then, the fan 81 was made capable of switching the flow of the formed air. However, the fan 81 passes through the opening 84H of the peripheral wall portion 84 and flows from the external space of the peripheral wall portion 84 to the internal space, and the air that passes through the opening 84H of the peripheral wall portion 84 and flows from the internal space of the peripheral wall portion 84 to the external space. It suffices if at least one of the flows can be formed.

Further, in the first embodiment, the third embodiment, and the fourth embodiment, the light source unit LU includes the fan 81, and the heat sink 80 has the peripheral wall portion 84. However, the fan 81 only needs to be able to form an air flow on the back surfaces 82b and 83b of the first base plate 82 and the second base plate 83, and the heat sink 80 does not have to have the peripheral wall portion 84.

Further, except for the case of the light source unit of the fifth aspect, the second contact surface 62s on the second substrate 60 and the contact surface 94s on the protrusion 94 may always be in contact with each other. For example, the protrusion 94 may be press-fitted into the positioning recess 62.

As described above, according to the first and second aspects of the present invention, a light source unit capable of suppressing defects is provided, and according to the third to fifth aspects of the present invention, a desired light distribution can be formed. A method for manufacturing a light source unit and a mounting member used therein is provided, and according to the sixth aspect of the present invention, a light source unit capable of miniaturization while suppressing overheating of a heat sink is provided and used in fields such as lighting. It is possible.

1 ... Vehicle headlight 3 ... Lighting unit 20 ... Projection lens 24 ... Grease (flowing member)
25 ... Lens holder 30 ... Support plate (pressing member)
31 ... Base portion 31a ... Convex portion 31b ... Contact portion 40 ... Reflector unit 50 ... First substrate 50G ... Center of gravity 50s of the first substrate ... Mounting surface 51 ... Through hole 51s ... 1st contact surface 52s ... 2nd contact surface 53s ... 3rd contact surface 54 ... Notch 55 ... 1st light emitting element (light emitting element)
60 ... Second substrate 60G ... Center of gravity 60s of the second substrate ... Mounting surface 61 ... Through hole 61s ... First contact surface 62 ... Positioning recess 62s ... Second Contact surface 63 ... Second light emitting element (light emitting element)
70 ... Flexible printed circuit board 71 ... First connection 72 ... Second connection 73 ... Band 74c ... Power supply wiring (wiring)
75c ・ ・ ・ Wiring for thermistor (wiring)
80 ... Heat sink (mounting member)
80i ... Intermediate member 81 ... Fan 82 ... First base plate 82f ... Front surface of first base plate 82b ... Back surface of first base plate 83 ... Second base plate 83f ... -Front surface 83b of the second base plate ... Back surface 84 of the second base plate ... Peripheral wall portion 84H ... Opening 85 ... Rectifying plate 85a ... Protruding portion 86 ... First mounting surface 86p ... 1st temporary mounting surface 87 ... 1st rib (rib)
88 ... Boss 88s ... Contact surface 88sp ... First temporary contact surface 89 ... Recessed 91 ... Second mounting surface 91p ... Second temporary mounting surface 92 ... 2nd rib (rib)
93 ... Rib reinforcement 94 ... Protrusions 94s ... Contact surface 94sp ... Second temporary contact surface 96 ... Recesses (recesses) for flow members
96a ... Recessed part for first flow member (first concave part)
96b ... Recess for second flow member (second recess)
97 ... Protrusion 97s ... Contact surface 98a ... First vent (vent)
98b ・ ・ ・ Second vent (vent)
La, Lb, Lc, Ld ... Straight line Lf ... First straight line Ls ... Second straight line LU ... Light source unit

Claims (34)

The first and second substrates on which the light emitting elements are mounted, respectively,
A heat sink having a first mounting surface on which at least a part of the first substrate is mounted and a second mounting surface on which at least a part of the second substrate is mounted.
A flow member interposed between the first substrate and the first mounting surface and between the second substrate and the second mounting surface.
With
The first substrate and the second substrate are placed on the heat sink at a predetermined interval.
The heat sink has an edge on the second substrate side of a region overlapping the first substrate on the first mounting surface and an edge on the first substrate side of a region overlapping the second substrate on the second mounting surface. A light source unit characterized by having a recess capable of accommodating a part of the flow member between the two. At least a part of the recess is the first substrate in the region of the first mounting surface that overlaps with the first substrate and the edge of the region of the second mounting surface that overlaps with the second substrate. The light source unit according to claim 1, wherein the light source unit is located in a region where the distance from the side edge is minimized. At least a part of the recess passes through one end of the light emitting element of at least one of the first substrate and the second substrate in a direction perpendicular to the direction from the first substrate side to the second substrate side. Claim 1 or 2 is characterized in that it is located between a first straight line parallel to the direction from the substrate side toward the second substrate side and a second straight line passing through the other end and parallel to the first straight line. The light source unit described. The heat sink has an edge on the second substrate side of a region overlapping the first substrate on the first mounting surface and an edge on the first substrate side of a region overlapping the second substrate on the second mounting surface. Has two surfaces arranged between the first mounting surface side and the second mounting surface side.
The angle between the two surfaces is less than 180 degrees.
The light source unit according to any one of claims 1 to 3, wherein the recess is formed between the two surfaces and is connected to the two surfaces. The recess is a first recess that is recessed on the side opposite to the first substrate side from the first mounting surface, and is located on the second mounting surface side of the first recess and from the second mounting surface. The light source unit according to any one of claims 1 to 3, further comprising a second recess that is recessed on the side opposite to the second substrate side. Any one of claims 1 to 5, wherein the normal of the first mounting surface extending toward the first substrate side intersects with the normal of the second mounting surface extending toward the second substrate side. The light source unit described in the section. A claim, wherein at least one of the light emitting elements of the first substrate and the second substrate is located on the other substrate side of the one substrate on which the light emitting element is mounted, rather than the one substrate side. The light source unit according to any one of 1 to 6. The first and second substrates on which the light emitting elements are mounted, respectively,
A mounting member having a first mounting surface on which at least a part of the first substrate is mounted and a second mounting surface on which at least a part of the second substrate is mounted.
A flexible printed circuit having a first connection portion connected to a mounting surface on which the light emitting element is mounted on the first substrate and a second connection portion connected to a mounting surface on which the light emitting element is mounted on the second substrate. With the board
With
The first substrate and the second substrate are placed on the mounting member at a predetermined interval.
The normal extending toward the first substrate side of the first mounting surface intersects with the normal extending toward the second substrate side of the second mounting surface.
The flexible printed circuit board bends convexly toward the mounting member side between the first board and the second board, and is a region on the first mounting surface side of the first connecting portion. A light source unit that passes through at least one of the regions on the second mounting surface side of the second connecting portion. At least one of the first substrate and the second substrate is formed with a notch extending from the outer edge of the other substrate side to a predetermined position when the one substrate is viewed in a plan view.
The light source unit according to claim 8, wherein the flexible printed circuit board passes through the notch. The light emitting element mounted on the one substrate is arranged on the other substrate side rather than the edge on the opposite side to the other substrate side in the notch when the one substrate is viewed in a plan view. The light source unit according to claim 9. The mounting member has a recess between the first substrate and the second substrate that is recessed on the side opposite to the flexible printed circuit board side of at least one of the first mounting surface and the second mounting surface. Have and
The light source unit according to any one of claims 8 to 10, wherein the flexible printed circuit board passes through the recess. The light source unit according to any one of claims 8 to 11, wherein the flexible printed circuit board is in non-contact with the mounting member. According to claim 8, the flexible printed circuit board has a plurality of wirings extending from the first connection portion to the second connection portion, and a slit is formed between the wirings adjacent to each other. The light source unit according to any one of 12. With the two flexible printed circuit boards
The center of gravity of at least one of the first substrate and the second substrate is located between the respective connection portions of the two flexible printed circuit boards connected to the one substrate. The light source unit according to any one of claims 8 to 13. A substrate on which a light emitting element is mounted and a through hole is formed that penetrates in the plate thickness direction.
It abuts on a mounting surface on which at least a part of the substrate is mounted, a rib inclined with respect to the normal of the mounting surface described above and inserted into the through hole of the substrate, and a part of a side surface of the substrate. A mounting member with a contact surface and
With
At least one of the outer peripheral surface on one side and the outer peripheral surface on the other side of the rib in the direction perpendicular to the extending direction of the rib when the above-mentioned mounting surface is viewed in a plan view is inside the substrate defining the through hole. In contact with a part of the peripheral surface,
A light source unit characterized in that a tangent line between a part of a side surface of the substrate and the contact surface when the above-mentioned mounting surface is viewed in a plan view is not parallel to the extending direction of the rib. 15. The mounting member according to claim 15, further comprising a rib reinforcing portion connected to a surface on which the rib is formed and an outer peripheral surface of the rib on a side tilted with respect to the previously described mounting surface. Light source unit. The mounting member further has a protrusion on which the contact surface is formed.
The light source unit according to claim 15 or 16, wherein the rib protrudes from the protrusion in the normal direction of the above-mentioned mounting surface. The mounting member further has a second mounting surface on which at least a part of the second substrate on which the light emitting element is mounted is mounted and is non-parallel to the previously described mounting surface.
The light source unit according to any one of claims 15 to 17, wherein the second mounting surface is visible when viewed from the extending direction of the rib. It is a method of manufacturing a mounting member on which a substrate is mounted.
The mounting member has a mounting surface on which at least a part of the substrate is mounted, ribs inclined with respect to the normal of the mounting surface described above, and a contact surface that abuts a part of the side surface of the substrate. And
When the above-mentioned mounting surface is viewed in a plan view, the contact surface is non-parallel to the extending direction of the rib.
A mold forming step of forming a temporary mounting surface covering the above-mentioned mounting surface, a temporary contact surface covering the contact surface, and an intermediate member having the ribs by mold molding.
A cutting step of cutting the temporary mounting surface and the temporary contact surface to form the above-mentioned mounting surface and the contact surface.
With
A method for manufacturing a mounting member, which comprises forming at least a part of the above-mentioned mounting surface and at least a part of the contact surface at the same time in the cutting step. The substrate on which the light emitting element is mounted and
A mounting member having a mounting surface on which at least a part of the substrate is mounted and a contact surface that abuts a part of the side surface of the substrate.
A pressing member that contacts at least a contact portion on a mounting surface on which the light emitting element is mounted and presses the substrate against the above-mentioned mounting surface and the contact surface.
A light source unit characterized by being equipped with. The light source according to claim 20, wherein the contact surface is located in a direction of a force at which the pressing member presses the substrate against the contact surface rather than the contact portion when the substrate is viewed in a plan view. unit. At least a part of the contact surface is one end of the contact portion in a direction parallel to and perpendicular to the direction of the force with which the pressing member presses the substrate against the contact surface when the substrate is viewed in a plan view. The light source unit according to claim 20 or 21, wherein the light source unit is located between a straight line passing through and another straight line parallel to the straight line and passing through the other end of the contact portion. The substrate has two said contacts and
At least a part of the contact surface is parallel to the direction of the force with which the pressing member presses the substrate against the contact surface when the substrate is viewed in a plan view, and is parallel to the other contact portion side of the contact portion. 20. Claim 20 characterized by being located between a straight line passing through the opposite end and another straight line parallel to the straight line and passing through one of the contacting portions and the opposite end of the other contacting portion. The light source unit according to any one of 22 to 22. The light source according to any one of claims 20 to 23, wherein the pressing member has elasticity, and the substrate is pressed against the above-mentioned mounting surface and the contact surface by the elastic force of the pressing member. unit. The first and second substrates on which the light emitting elements are mounted, respectively,
A heat sink having a first mounting surface on which at least a part of the first substrate is mounted and a second mounting surface on which at least a part of the second substrate is mounted.
With
The first substrate and the second substrate are placed on the heat sink at a predetermined interval.
A light source unit characterized in that a normal extending toward the first substrate side of the first mounting surface intersects with a normal extending toward the second substrate side of the second mounting surface. With more fans
The heat sink has a first base plate on which the first mounting surface is formed on one surface, and a second base plate on which the second mounting surface is formed on one surface.
A part of the outer edge of the first base plate and a part of the outer edge of the second base plate are connected to each other.
25. The light source unit according to claim 25, wherein the fan forms a flow of air on the other surface of the first base plate and the other surface of the second base plate. The heat sink has a tubular peripheral wall portion in which at least a part of one end is fixed to the first base plate and the second base plate, and a vent that communicates the internal space and the external space of the peripheral wall portion. Have,
The fan forms a flow of air through the opening at the other end of the peripheral wall.
At least a part of the vent is from the connection portion between the first base plate and the second base plate in a cross section perpendicular to the other surface of the first base plate and the other surface of the second base plate. 26. The light source unit according to claim 26, wherein the light source unit is also arranged on the side opposite to the fan side. The light source unit according to claim 27, wherein the peripheral wall portion surrounds the outer periphery of the fan. The light source unit according to claim 27 or 28, wherein a part of at least one of the first substrate and the second substrate overlaps with the vent in the opening direction of the vent. According to claim 27, the heat sink further includes at least one straightening vane extending from one end side of the peripheral wall portion toward the other end side in at least the internal space of the peripheral wall portion. 29. The light source unit according to any one item. The light source unit according to claim 30, wherein the straightening vane is connected to the first base plate and the second base plate. The light source unit according to claim 30 or 31, wherein the straightening vane crosses the vent when viewed from the opening direction of the vent. In the opening direction of the vent, a part of at least one of the first substrate and the second substrate overlaps with the vent.
At least one of the straightening vanes has a protrusion protruding from the vent to the external space of the peripheral wall portion.
The light source unit according to claim 32, wherein the protruding portion comes into contact with a substrate that overlaps the vent when viewed from the opening direction of the vent. The vent is the first in a cross section perpendicular to the other surface of the first base plate and the other surface of the second base plate, rather than the connection portion between the first base plate and the second base plate. The light source unit according to any one of claims 27 to 33, further comprising a first vent arranged on the base plate side and a second vent arranged on the second base plate side. ..

Images