JP6712769B2 - Light source unit, lighting device, and vehicle - Google Patents

Description

The present invention relates to a light source unit, a lighting device, and a vehicle.

BACKGROUND ART Conventionally, a vehicle lamp including a light emitting module (light source unit) that uses a semiconductor light emitting element such as an LED (Light Emitting Diode) as a light source has been proposed (see, for example, Patent Document 1).

The light emitting module described in Patent Document 1 includes an L-shaped support member formed of a metal material. A semiconductor light emitting device package is mounted on the upper surface of the supporting member, and a lighting control circuit for lighting the semiconductor light emitting device is mounted on the side surface of the supporting member.

JP 2012-74217 A

In the light emitting module described in Patent Document 1, the package of the semiconductor light emitting element and the lighting control circuit are attached to a supporting member formed of a metal material. Therefore, heat generated in one of the package of the semiconductor light emitting element and the lighting control circuit may be transferred to the other of the package of the semiconductor light emitting element and the lighting control circuit via the support member. Therefore, there is a possibility that the heat generated in the semiconductor light emitting device and the lighting control circuit cannot be properly dissipated.

An object of the present invention is to provide a light source unit, a lighting device, and a vehicle that can improve heat dissipation performance.

The light source unit of the first aspect of the present invention includes a semiconductor light emitting element, said semiconductor light emitting element lighting circuit for lighting, it is formed of a metal material, a first heat sink wherein the semiconductor light emitting elements are arranged, metal The second heat dissipation plate , which is made of a material and on which the lighting circuit is arranged, includes a wiring member, a connecting member, and a conductive member. The wiring member electrically connects the semiconductor light emitting element and the lighting circuit. The first heat radiating plate and the second heat radiating plate are attached to the connecting member, respectively. The conductive member electrically connects the first heat dissipation plate and the second heat dissipation plate. The connection member has a lower thermal conductivity than the first heat dissipation plate and the second heat dissipation plate. In the conductive member, the amount of heat that moves through the conductive member between the first heat dissipation plate and the second heat dissipation plate causes the connecting member to move between the first heat dissipation plate and the second heat dissipation plate. It is formed so as to be smaller than the amount of heat moving through it.
The light source unit of the second aspect of the present invention includes a semiconductor light emitting element, said semiconductor light emitting element lighting circuit for lighting, it is formed of a metal material, a first heat sink wherein the semiconductor light emitting elements are arranged, metal The second heat dissipation plate , which is made of a material and on which the lighting circuit is arranged, includes a wiring member, a connecting member, and a conductive member. The wiring member electrically connects the semiconductor light emitting element and the lighting circuit. The first heat radiating plate and the second heat radiating plate are attached to the connecting member, respectively. The conductive member electrically connects the first heat dissipation plate and the second heat dissipation plate. The connection member has a lower thermal conductivity than the first heat dissipation plate and the second heat dissipation plate. The conductive member has a flexible contact piece. The contact piece is in contact with one surface of the first heat dissipation plate and the second heat dissipation plate. The conductive member is attached to the other of the first heat dissipation plate and the second heat dissipation plate. Of the first heat dissipation plate and the second heat dissipation plate, the heat dissipation plate with which the contact piece contacts has a first recess into which the contact piece is inserted.

An illuminating device according to one aspect of the present invention includes the above-mentioned light source unit, a case having an opening portion for accommodating the light source unit therein, and a translucent member attached to the case so as to close the opening portion. It has and.

A vehicle according to one aspect of the present invention includes the lighting device described above and a vehicle body to which the lighting device is attached.

According to the light source unit of one embodiment of the present invention, heat dissipation performance can be improved.

According to the lighting device of one embodiment of the present invention, heat dissipation performance can be improved.

According to the vehicle of one aspect of the present invention, heat dissipation performance can be improved.

FIG. 1A is a front perspective view of a light source unit according to an embodiment of the present invention, and FIG. 1B is a rear perspective view of the same light source unit. It is an exploded perspective view of a light source unit same as the above. It is a right view of a light source unit same as the above. It is a block diagram of a lighting circuit of a light source unit same as the above. It is sectional drawing of the illuminating device provided with the light source unit same as the above. It is a perspective view of a conductive member of the above light source unit. It is sectional drawing of the connection part of the electrically conductive member of a light source unit same as the above, and a 1st heat sink. It is a rear perspective view of another example of a light source unit same as the above. It is a front view of an illuminating device same as the above. It is a front view of the vehicle provided with the same illuminating device. It is sectional drawing of the illuminating device provided with the light source unit of the modification of the embodiment same as the above.

One embodiment of the present invention relates to a light source unit, a lighting device, and a vehicle, and more particularly to a light source unit using a semiconductor light emitting element as a light source, a lighting device, and a vehicle.

Hereinafter, the light source unit according to the present embodiment will be described with reference to the drawings. In the present embodiment, the light source unit is used for a fog lamp of a vehicle (for example, an automobile or a motorcycle), but the use of the light source unit is not limited to the fog lamp, and may be a headlight or a backlight of the vehicle, or a vehicle. It can also be used for lighting devices other than lighting devices for cars. That is, the present invention is not limited to the following embodiments, and various modifications can be made according to the design etc. within the range not departing from the technical idea of the present invention.

The light source unit 1 of this embodiment will be described with reference to FIGS. 1 to 8.

The light source unit 1 of the present embodiment includes a semiconductor light emitting element (LED 10), a lighting circuit 20, a first heat radiating plate 30, a second heat radiating plate 40, a wiring member (wire harness 29), a connecting member 50, and a cover. 60 and a conductive member 130 are further provided. In the following description of the light source unit 1, the up-down direction, the left-right direction, and the front-rear direction indicated by the arrows in FIGS. 1A and 1B correspond to the up-down direction, the left-right direction, and the front-rear direction of the light source unit 1, respectively.

The light source unit 1 is an LED (Light Emitting Diode) as a semiconductor light emitting element.
) 10 is provided. The number of LEDs 10 may be one or more, and when the light source unit 1 includes a plurality of LEDs 10, the plurality of LEDs 10 may be connected in series or in parallel. The semiconductor light emitting element is not limited to the LED 10, and may be an organic EL element (Organic Electro Luminescent Devices).

As shown in FIG. 4, the lighting circuit 20 includes an input filter circuit 21, a DC-DC converter circuit 22, an output filter circuit 23, and a control circuit 24.

The input filter circuit 21 is electrically connected to a DC power supply 120 that is a vehicle battery. The input filter circuit 21 is, for example, a noise filter including a choke coil, and attenuates a high-frequency noise component that flows from the DC-DC converter circuit 22 to the DC power supply 120 side.

The DC-DC converter circuit 22 is, for example, a step-up type chopper circuit. The DC-DC converter circuit 22 converts the power supply voltage of the DC power supply 120 input via the input filter circuit 21 into a constant DC voltage and outputs it. The DC-DC converter circuit 22 is not limited to the step-up type chopper circuit, and may be a step-up/down type chopper circuit or a step-down type chopper circuit.

The output filter circuit 23 is electrically connected between the DC-DC converter circuit 22 and the LED 10. The output filter circuit 23 is, for example, a noise filter including a common mode choke, and attenuates a high frequency noise component included in the output of the DC-DC converter circuit 22.

The control circuit 24 controls the switching element included in the DC-DC converter circuit 22. The control circuit 24 adjusts the output voltage of the DC-DC converter circuit 22 by controlling the duty ratio of the switching element. The control circuit 24 controls the duty ratio of the switching element so that the current value flowing through the LED 10 becomes a desired current value.

In the lighting circuit 20, the DC-DC converter circuit 22 performs voltage conversion of the DC voltage input from the DC power supply 120 via the input filter circuit 21. The output voltage of the DC-DC converter circuit 22 is applied to the LED 10 via the output filter circuit 23. A current according to the output voltage of the DC-DC converter circuit 22 flows through the LED 10, so that the LED 10 lights up.

The lighting circuit 20 has a circuit board 25 such as a printed wiring board (see FIG. 2). On the circuit board 25, electric components 26 that form the input filter circuit 21, the DC-DC converter circuit 22, the output filter circuit 23, and the control circuit 24 are mounted. The circuit board 25 is attached to the first surface (front surface) 40a of the two surfaces (the first surface 40a and the second surface 40b) in the thickness direction of the second heat dissipation plate 40, which is closer to the first heat dissipation plate 30 ( See FIG. 1A). A box-shaped cover 60 having a rear surface opened is attached to the first surface 40 a of the second heat dissipation plate 40. When the cover 60 is attached to the second heat dissipation plate 40, the circuit board 25 is covered with the cover 60.

Two insertion terminals 27 (second terminals) are attached to the circuit board 25 (see FIG. 2). The two plug-in terminals 27 are male terminals and are terminals for energizing the lighting circuit 20. The two plug-in terminals 27 penetrate the circuit board 25 in the thickness direction and project rearward from the rear surface of the circuit board 25. A female-side connection terminal 111 (first terminal) provided on the power supply line 110 from the DC power supply 120 is detachably connected to the insertion terminal 27 (see FIG. 5 ). When the connection terminal 111 of the power supply line 110 from the DC power supply 120 is connected to the insertion terminal 27 of the light source unit 1, a DC voltage is supplied from the DC power supply 120 to the lighting circuit 20. The shapes of the first terminal and the second terminal are not limited to the shapes of this embodiment, and may be other shapes. For example, the second terminal may be a terminal (first terminal) provided at the end of the power supply line 110 or a screw terminal to which the power supply line 110 itself is screwed, or the first terminal and the second terminal may be Alternatively, the terminals of the connectors may be detachable from each other.

Further, on the front surface of the circuit board 25, a socket connector 28 to which a plug connector 29a provided at one end of the wire harness 29 is detachably connected is provided (see FIG. 1A). The socket connector 28 is electrically connected to the output end of the output filter circuit 23. The socket connector 28 is exposed to the outside of the cover 60 through a square hole 61 provided in the cover 60.

The first heat dissipation plate 30 is made of a metal material (for example, an aluminum alloy) and has a flat plate shape. The first heat dissipation plate 30 has, for example, a rectangular shape, and the length direction, the width direction, and the thickness direction of the first heat dissipation plate 30 correspond to the left-right direction, the front-back direction, and the up-down direction of the light source unit 1, respectively. To do. The first heat dissipation plate 30 is provided with a through hole 31 at a portion that overlaps the upper surface (first attachment surface 50a) of the connecting member 50 in the vertical direction. Countersunk screws 71 are inserted into the through holes 31. The inner peripheral surface of the through hole 31 is an inclined surface in which the hole diameter gradually increases from the lower end side toward the upper end side. Therefore, when the flat head screw 71 is inserted into the through hole 31, the head of the flat head screw 71 does not project upward from the upper surface of the first heat dissipation plate 30.

Of the two surfaces in the thickness direction of the first heat dissipation plate 30, an insulating film is formed on the mounting surface (lower surface in FIG. 1A) 30a close to the second heat dissipation plate 40. The LED 10 and the socket connector 32 to which the plug connector 29b provided at the other end of the wire harness 29 is detachably connected are provided on the surface of the insulating film formed on the mounting surface 30a. Further, on the surface of the insulating film formed on the mounting surface 30a, circuit wiring (for example, circuit wiring made of a metal film such as copper foil) for electrically connecting the socket connector 32 and the LED 10 is formed. .. When the plug connector 29a of the wire harness 29 is connected to the socket connector 28 and the plug connector 29b is connected to the socket connector 32, the LED 10 is electrically connected to the output end of the output filter circuit 23 via the wire harness 29. Connected.

The wiring member that electrically connects the LED 10 and the lighting circuit 20 is not limited to the wire harness 29. For example, the LED 10 and the lighting circuit 20 may be electrically connected via a conductive plate. Further, the LED 10 and the lighting circuit 20 may be electrically connected to each other via a conductive plate that is integrally provided on a molded component that forms the coupling member 50.

The first heat dissipation plate 30 is provided with a through hole 33 (first recess) into which a part of the conductive member 130 is inserted. Since the through hole 33 is formed, for example, by pressing the first heat dissipation plate 30, no insulating film is formed on the inner peripheral surface of the through hole 33, and the bare metal of the first heat dissipation plate 30 is exposed. doing. Although the first recess is the through hole 33 in the present embodiment, it is not essential that the first recess penetrates the first heat dissipation plate 30, and the first recess may be a hole that does not penetrate the first heat dissipation plate 30. ..

The second heat dissipation plate 40 is made of a metal material (for example, an aluminum alloy) and has a flat plate shape. The second heat dissipation plate 40 has, for example, a rectangular shape, and the length direction, the width direction, and the thickness direction of the second heat dissipation plate 40 correspond to the left-right direction, the up-down direction, and the front-back direction of the light source unit 1, respectively. To do. The maximum width dimension of the second heat dissipation plate 40 in the left-right direction is substantially the same as the maximum width dimension of the rear end portion of the first heat dissipation plate 30 in the left-right direction.

Of the two surfaces (the first surface 40A and the second surface 40B) in the thickness direction of the second heat dissipation plate 40, the circuit of the lighting circuit 20 is provided on the first surface (the front surface in FIG. 1A) 40a close to the first heat dissipation plate 30. The substrate 25 is screwed with screws 73. The second heat dissipation plate 40 has two screw holes 41 into which two screws 72 for fixing the connecting member 50 are screwed, and three screws 73 for fixing the circuit board 25, respectively. Three screw holes 42 to be inserted are provided. Here, the two screw holes 41 and two of the three screw holes 42 are located in a portion of the second heat dissipation plate 40 that overlaps with the rear surface (second mounting surface 50b) of the connecting member 50 in the front-rear direction. It is provided.

Further, on the front surface of the second heat dissipation plate 40, two projections 43 for positioning the circuit board 25, two projections 44 contacting the rear surface of the circuit board 25, and two for positioning the cover 60. The individual protrusions 45 are formed by, for example, press working. The circuit board 25 is provided with three through holes 251 facing the three screw holes 42, respectively. Further, the circuit board 25 is provided with two through holes 252 respectively corresponding to the two protrusions 43.

The circuit board 25 is arranged on the front side of the second heat dissipation plate 40 in a state where the projections 43 corresponding to the two through holes 252 are inserted, and correspond to the screws 73 inserted into the three through holes 251. It is attached to the second heat dissipation plate 40 by being screwed into the screw hole 42. In the state where the circuit board 25 is screwed to the second heat dissipation plate 40, the projection 44 is in contact with the rear surface of the circuit board 25, so that the circuit board 25 is stable.

The connecting member 50 is formed of a material having a lower thermal conductivity than the respective materials (for example, a metal material such as an aluminum alloy) of the first heat dissipation plate 30 and the second heat dissipation plate 40. In the present embodiment, the connecting member 50 is formed of a synthetic resin such as PBT (Poly Butylene Terephthalate), but the material of the connecting member 50 is not limited to PBT and may be a synthetic resin other than PBT. .. The connecting member 50 is made of, for example, an electrically insulating material.

The connecting member 50 is a polyhedron, and is formed so that the cross-sectional shape of the plane orthogonal to the left-right direction is an inverted L-shape. The rear end portion of the first heat radiation plate 30 is screwed to the first mounting surface 50a, which is the upper surface of the connecting member 50, using countersunk screws 71. The upper portion of the second heat dissipation plate 40 is screwed to the second mounting surface 50b, which is the rear surface of the connecting member 50, using screws 72.

In the connecting member 50, the first mounting surface 50a on which the first heat dissipation plate 30 is mounted and the second mounting surface 50b on which the second heat dissipation plate 40 is mounted are in a positional relationship of intersecting with each other (see FIG. 3). That the first mounting surface 50a and the second mounting surface 50b are in a positional relationship of intersecting each other means that the surfaces in the thickness direction of the first heat dissipation plate 30 and the surfaces in the thickness direction of the second heat dissipation plate 40 are orthogonal to each other. Then, the normal direction of the first mounting surface 50a (direction parallel to the straight line D1 in FIG. 3) and the normal direction of the second mounting surface 50b (direction parallel to the straight line D2 in FIG. 3) intersect at an arbitrary angle. It means that there is a positional relationship. In the present embodiment, the normal line direction of the first mounting surface 50a and the normal line direction of the second mounting surface 50b are orthogonal to each other. However, the angle between the normal line direction of the first attachment surface 50a and the normal line direction of the second attachment surface 50b does not have to be a right angle in the strict sense, and may be an angle that can be regarded as a right angle.

The connecting member 50 is provided with two through holes 51 that respectively face the two screw holes 41 of the second heat dissipation plate 40. Further, the connecting member 50 is provided with two through holes 52 that respectively face the two screw holes 42 provided in the second heat radiating plate 40 at a position overlapping the connecting member 50 in the front-rear direction. Further, on the rear surface of the circuit board 25, the above-described two plug-in terminals 27 are provided in a portion overlapping with the connecting member 50 in the front-rear direction, and the two plug-in terminals 27 are inserted into the connecting member 50, respectively. Two slits 53 (second recesses) are provided. In the light source unit 1, a part of the corresponding plug-in terminal 27 is arranged in each of the two slits 53, and a part of the plug-in terminal 27 is supported by the connecting member 50.

The cover 60 is made of a metal material. The cover 60 is formed in a box shape whose rear surface is open. Mounting pieces 62 projecting outward are respectively provided at the rear end portions of the left and right side plates of the cover 60, and the left and right mounting pieces 62 are provided with through holes 63 into which the protrusions 45 are inserted.

The conductive member 130 is formed of a material having conductivity (for example, a metal material). As shown in FIG. 6, the conductive member 130 has a fixed piece 131 and a protruding piece 132.

The fixed piece 131 is formed in a rectangular plate shape, and the fixed piece 131 is provided with a through hole 134. The fixing piece 131 is arranged on the front surface of the circuit board 25 so that the through hole 134 is overlapped with the through hole 251 provided at the upper right of the circuit board 25 (see FIG. 2 ).

The protruding piece 132 has a substantially U-shape when viewed from the left and right, and one end of the protruding piece 132 is connected to the upper piece of the fixed piece 131. The other end of the projecting piece 132 is bifurcated, and a contact piece 133 projecting upward is provided at the tip of the bifurcated portion.

The light source unit 1 is assembled as follows.

The worker inserts the screw 72, which has passed through the through hole 51, into the screw hole 41 in a state where the second mounting surface 50b of the connecting member 50 is overlaid with the upper portion of the second heat radiating plate 40, so that the connecting member 50 is attached to the second mounting surface 50b. The heat sink 40 is screwed. Next, the operator positions the circuit board 25 with respect to the second heat dissipation plate 40 by disposing the circuit board 25 on the front surface 40 a of the second heat dissipation plate 40 and inserting the protrusion 43 into the through hole 252. The worker inserts the screws 73 into the three through holes 251 of the circuit board 25 from the front side, respectively, and screws these screws 72 into the corresponding screw holes 42 to attach the circuit board 25 to the second heat dissipation plate 40. .. At this stage, the fixing piece 131 is arranged on the front surface 40a of the circuit board 25 so that the through hole 134 overlaps the through hole 251, and the conductive member 130 is fixed to the second heat dissipation plate 40 together with the circuit board 25 by the screw 72. ing. Therefore, the conductive member 130 and the second heat dissipation plate 40 are electrically connected via the screw 72. Further, the protruding piece 132 is arranged so as to bypass the connecting member 50, and the contact piece 133 is arranged on the upper surface (first mounting surface 50a) of the connecting member 50.

After that, the operator arranges the cover 60 on the front surface 40 a of the second heat dissipation plate 40 so as to cover the circuit board 25, and crushes the projection 45 inserted into the through hole 63 of the attachment piece 62 to crush the cover 60. Are fixed to the second heat dissipation plate 40.

Next, the worker screws the countersunk screw 71 passed through the through hole 31 into the screw hole of the connecting member 50 in a state where the rear portion of the first heat dissipation plate 30 is overlapped with the first mounting surface 50a of the connecting member 50. The first heat dissipation plate 30 is screwed to the connecting member 50. At this time, as shown in FIGS. 1B and 7, the pair of contact pieces 133 of the conductive member 130 are inserted into the through holes 33 of the first heat dissipation plate 30, and the pair of contact pieces 133 are on the surface of the through hole 33. To contact. An insulating film is formed on the lower surface 30a of the first heat dissipation plate 30, but since the through hole 33 is formed by making a hole in the first heat dissipation plate 30, the surface of the through hole 33 is insulated. There is no film, and the contact piece 133 and the first heat dissipation plate 30 are electrically connected. That is, the first heat dissipation plate 30 and the second heat dissipation plate 40 are electrically connected via the conductive member 130. Here, the contact pressure between the contact piece 133 and the first heat dissipation plate 30 is secured by the spring property of the contact piece 133.

Then, the worker connects the plug connector 29a of the wire harness 29 to the socket connector 28 and the plug connector 29b to the socket connector 32. This completes the assembly of the light source unit 1.

When the assembly of the light source unit 1 is completed, the first heat dissipation plate 30 and the second heat dissipation plate 40 are electrically connected via the conductive member 130. The portion of the conductive member 130 that is thermally coupled to the first heat dissipation plate 30 is the contact piece 33. Further, the portion of the conductive member 130 that is thermally coupled to the second heat dissipation plate 40 is the portion of the fixing piece 131 that the head of the screw 72 contacts. On the other hand, the portion of the connecting member 50 that contacts the first heat dissipation plate 30 is the first mounting surface 50a, and the portion of the connecting member 50 that contacts the second heat dissipation plate 40 is the second mounting surface 50b. Therefore, the areas of the portions of the conductive member 130 that are thermally coupled to the first heat radiating plate 30 and the second heat radiating plate 40 are the same as those of the connecting member 50 for the first heat radiating plate 30 and the second heat radiating plate 40, respectively. It is smaller than the area of each contacting part. Therefore, even if the material of the conductive member 130 has a higher thermal conductivity than the material of the connecting member 50, the amount of heat transferred between the first heat dissipation plate 30 and the second heat dissipation plate 40 through the conductive member 130 is It can be made smaller than the amount of heat that moves between the heat dissipation plate 30 and the second heat dissipation plate 40 via the connecting member 50. Therefore, even if the first heat radiating plate 30 and the second heat radiating plate 40 are electrically connected via the conductive member 130, heat is unlikely to be transferred between the first heat radiating plate 30 and the second heat radiating plate 40. Become.

In the light source unit 1, the conductive member 130 is attached to the second heat dissipation plate 40, and the contact piece 133 is in contact with the first heat dissipation plate 30. However, the conductive member 130 may be attached to the first heat dissipation plate 30, and the contact piece 133 may contact the second heat dissipation plate 40.

Further, the conductive member 130 is not limited to the above-described form, and can be appropriately changed as long as the first heat dissipation plate 30 and the second heat dissipation plate 40 can be electrically connected with low resistance. For example, one end of the conductive member 130 is fixed to the side surface of the first heat dissipation plate 30 by welding or screwing, and the other end of the conductive member 130 is welded to the side surface of the second heat dissipation plate 40 or screwed. It may be fixed by a method. As a result, the first heat dissipation plate 30 and the second heat dissipation plate 40 are electrically connected via the conductive member 130. Further, like another example of the light source unit 1 shown in FIG. 8, instead of the conductive member 130, a conductive tape attached so as to straddle between the first heat radiating plate 30 and the second heat radiating plate 40. 140 may be used as a conductive member. Further, in still another example of the light source unit 1, instead of the conductive member 130, an electric wire whose one end is screwed to the first heat dissipation plate 30 and whose other end is screwed to the second heat dissipation plate 30 is used as the conductive member. May be

As described above, the light source unit 1 of this embodiment includes the semiconductor light emitting element (LED 10), the lighting circuit 20, the first heat dissipation plate 30, the second heat dissipation plate 40, and the wiring member (wire harness 29). , And a connecting member 50. The lighting circuit 20 lights the semiconductor light emitting element. A semiconductor light emitting element is arranged on the first heat dissipation plate 30. The lighting circuit 20 is arranged on the second heat dissipation plate 40. The wiring member electrically connects the semiconductor light emitting element and the lighting circuit 20. The first heat dissipation plate 30 and the second heat dissipation plate 40 are attached to the connecting member 50, respectively. The connection member 50 has a lower thermal conductivity than the first heat dissipation plate 30 and the second heat dissipation plate 40.

As a result, heat is less likely to be transferred between the first heat radiating plate 30 and the second heat radiating plate 40 as compared with the case where the first heat radiating plate 30 and the second heat radiating plate 40 are integrally connected. Therefore, the heat generated in one of the semiconductor light emitting element and the lighting circuit 20 is less likely to be transmitted to the other, and as a result, the heat radiation of the semiconductor light emitting element and the lighting circuit 20 can be appropriately performed respectively, so that the heat radiation of the light source unit 1 is performed. Performance can be improved. Further, since the first heat radiating plate 30 and the second heat radiating plate 40 are respectively attached to the connecting member 50, they can be handled as an integral part, and the light source unit 1 can be easily transported and assembled. There is also.

In addition, in the light source unit 1 of the present embodiment, the connecting member 50 has the first mounting surface 50a and the second mounting surface 50b that is in a positional relationship intersecting with the first mounting surface 50a. The first heat dissipation plate 30 is attached to the first attachment surface 50a, and the second heat dissipation plate 40 is attached to the second attachment surface 50b.

As a result, the light source unit 1 can be made smaller than in the case where the first heat dissipation plate 30 and the second heat dissipation plate 40 are attached to the connecting member 50 so as to be parallel to each other.

In addition, the light source unit 1 of the present embodiment further includes a conductive member 130 that electrically connects the first heat dissipation plate 30 and the second heat dissipation plate 40.

If one of the first heat dissipation plate 30 and the second heat dissipation plate 40 is connected to the ground, the other one of the first heat dissipation plate 30 and the second heat dissipation plate 40 is also connected to the ground. In this case, both the first heat radiating plate 30 and the second heat radiating plate 40 can be connected to the ground, so that the noise radiated from the lighting circuit 20 can be reduced.

Further, in the light source unit 1 of the present embodiment, the amount of heat that the conductive member 130 moves between the first heat radiating plate 30 and the second heat radiating plate 40 via the conductive member 130 is the same as that of the first heat radiating plate 30 and the second heat radiating plate 30. It is formed so as to be smaller than the amount of heat that moves between the heat sink 40 and the connecting member 50.

Thereby, even when the first heat radiating plate 30 and the second heat radiating plate 40 are electrically connected via the conductive member 130, heat is transmitted between the first heat radiating plate 30 and the second heat radiating plate 40. It gets harder.

Further, in the light source unit 1 of the present embodiment, the areas of the portions of the conductive member 130 that are thermally coupled to the first heat radiating plate 30 and the second heat radiating plate 40 respectively have the first heat radiating plate of the connecting member 50. It is smaller than the area of the part which contacts 30 and the 2nd heat sink 40, respectively.

This reduces the amount of heat transferred between the first heat dissipation plate 30 and the second heat dissipation plate 40 via the conductive member 130.

In addition, in the light source unit 1 according to the present embodiment, the conductive member 130 has the flexible contact piece 133. The contact piece 133 is in contact with one surface of the first heat dissipation plate 30 and the second heat dissipation plate 40, and the conductive member 130 is attached to the other of the first heat dissipation plate 30 and the second heat dissipation plate 40. There is.

As a result, when the first heat dissipation plate 30 and the second heat dissipation plate 40 are attached to the connecting member 50, the contact piece 133 contacts one surface of the first heat dissipation plate 30 and the second heat dissipation plate 40. Therefore, it is not necessary to attach the conductive member 130 to both the first heat radiating plate 30 and the second heat radiating plate 40, and the work of attaching the conductive member 130 is simplified.

Further, in the light source unit 1 of the present embodiment, the heat dissipation plate of the first heat dissipation plate 30 and the second heat dissipation plate 40 with which the contact piece 133 is in contact has the first concave portion (through hole 33) into which the contact piece 133 is inserted. I have it.

Accordingly, the contact piece 133 inserted into the first recess is brought into contact with the surface (that is, the inner surface) of the first recess, so that the first heat dissipation plate 30 and the second heat dissipation plate 40 are electrically connected via the conductive member 130. Connected. The first recess may be a through hole that penetrates the heat sink or a hole in which a part of the heat sink is recessed (a hole that does not penetrate the heat sink).

In addition, the light source unit 1 of the present embodiment further includes an electrical connection portion (plug-in terminal 27) for energizing the lighting circuit 20, and the coupling member 50 has a first insertion portion in which a part of the electrical connection portion is inserted. Two recesses (slits 53) are provided.

This allows the connecting member 50 to which the first heat radiating plate 30 and the second heat radiating plate 40 are attached to support the electrical connection portion (plug-in terminal 27).

In addition, in the light source unit 1 of the present embodiment, the electrical connection portion is the second terminal (male side insertion terminal) electrically connected to the first terminal (female side connection terminal 111) of the power supply line 110. 27).

Thereby, the work of electrically connecting the first terminal of the power supply line 110 to the second terminal of the electrical connection portion can be easily performed.

Next, a lighting device 300 including the light source unit 1 of the present embodiment will be described with reference to FIGS. 5 and 9. In the description of the lighting device 300, the up-down direction, the left-right direction, and the front-back direction indicated by the arrows in FIGS. 5 and 9 correspond to the up-down direction, the left-right direction, and the front-back direction of the lighting device 300, respectively. Description will be given as a reference.

The lighting device 300 is, for example, a fog lamp mounted on a vehicle body 101 of a vehicle (for example, an automobile or a motorcycle).

The illumination device 300 includes the light source unit 1 of the present embodiment, a case 301, and a cover 303 (translucent member). Here, the translucent member is a member having a light transmissive property, and the translucent member may be a transparent member or a semitransparent member.

The case 301 is a molded product of synthetic resin such as PBT. The case 301 is formed in a box shape having an opening 302 on the front surface. The light source unit 1 is housed inside the case 301. The light source unit 1 is housed inside the case 301 with the second surface 40b of the second heat dissipation plate 40 facing the rear wall of the case 301 and the first heat dissipation plate 30 contacting the upper wall of the case 301. ing.

The first heat dissipation plate 30 is arranged inside the case 301 at a position closer to the opening 302 than the second heat dissipation plate 40, and at one end side (for example, the upper side) in the direction intersecting the front-rear direction. However, the first heat dissipation plate 30 may be arranged on the lower side, or may be arranged on the left side or the right side. Since the first heat sink 30 is in contact with the case 301, if the case 301 is electrically connected to the vehicle body 101, the first heat sink 30 will be electrically connected to the vehicle body 101.

A through hole 304 for exposing the plug-in terminal 27 to the outside is provided on the rear wall of the case 301, and a cylindrical peripheral wall 305 is provided around the through hole 304. A female-side connection terminal 111 is provided at the tip of the power supply line 110 from the DC power supply 120, and a cylindrical housing 112 is attached so as to surround the connection terminal 111. When the peripheral wall 305 is inserted into the housing 112, the female connection terminal 111 is connected to the male insertion terminal 27, and the DC power supply 120 is electrically connected to the lighting circuit 20. Further, when the peripheral wall 305 is inserted into the housing 112, the projection 306 provided on the outer surface of the peripheral wall 305 is caught in the recess provided on the inner surface of the housing 112, so that the housing 112 and the peripheral wall 305 are separated from each other. The connection status is retained.

The case 301 is attached to the vehicle body 101 so as to be swingable within a predetermined angle range around an axis provided on the upper side of the rear part. The direction of the irradiation light is adjusted by setting the direction of the case 301 to an arbitrary angle within a predetermined angle range. The plug-in terminal 27 for energizing the lighting circuit 20 projects rearward from the connecting member 50, and the light source unit 1 is housed in the case 301 so that the connecting member 50 is located on the upper side. That is, since the insertion terminal 27 is located at a position close to the swing center of the case 301, the displacement amount of the insertion terminal 27 can be reduced even when the case 301 is swung to adjust the direction of the irradiation light. ..

The cover 303 is made of synthetic resin (for example, polycarbonate) having a light transmitting property or glass. The cover 303 closes the opening 302 while being attached to the case 301 (see FIGS. 5 and 9). Since the cover 303 has a light transmitting property, the light from the light source unit 1 is radiated to the outside through the cover 303. It should be noted that the cover 303 may be transparent or semi-transparent as long as it has a light transmissive property.

Here, since the LED 10 attached to the first heat dissipation plate 30 emits light downward, the light source unit 1 is attached with the reflection member 80 that reflects the light emitted from the LED 10 forward. The reflecting member 80 is, for example, a synthetic resin molded product. The reflection member 80 has a fixed portion 81 fixed to the mounting surface 30 a of the first heat dissipation plate 30 and a reflection portion 82.

The fixing portion 81 is screwed to the first heat radiating plate 30 by, for example, screwing a screw 74 inserted into the through hole 35 of the first heat radiating plate 30 from above into the screw hole 81a of the fixing portion 81 (FIG. 5). reference).

The reflective portion 82 projects forward and downward from the front end portion of the fixed portion 81. The shape of the cross section of the reflecting section 82 orthogonal to the left-right direction is such that the distance from the first heat dissipation plate 30 gradually increases from the rear end toward the front end. Of the two surfaces in the thickness direction of the reflecting portion 82, the surface closer to the LED 10 is the reflecting surface 82a that reflects the light of the LED 10. Since the reflecting surface 82a is a parabolic surface having the position of the LED 10 as a focal point, the light emitted from the LED 10 is reflected by the reflecting surface 82a and is emitted forward. The reflective surface 82a is plated with silver, for example, in order to increase the reflectance.

By the way, in the light source unit 1 shown in FIG. 5, the front surface 60a of the cover 60 is inclined with respect to the front surface of the second heat dissipation plate 40 (circuit board 25) so as to protrude forward as it goes downward. The electrical components 26 that make up the lighting circuit 20 include a relatively tall component 26a such as a choke coil and a common mode choke, and a relatively shorter component 26b such as a resistor and a capacitor. There is. In the light source unit 1, in the plurality of electric components 26 forming the lighting circuit 20, the distance L2 between the tall component 26a and the connecting member 50 is larger than the distance L1 between the short component 26b and the connecting member 50. It is arranged on the circuit board 25 (second heat dissipation plate 40). Therefore, the front surface 60a of the cover 60 can be inclined with respect to the front surface of the second heat dissipation plate 40 so that the front surface 60a projects downward as it goes downward, and mechanical interference between the reflecting member 80 and the cover 60 occurs. It gets harder.

FIG. 10 is a front view of a vehicle 100 including the lighting device 300. The vehicle 100 includes a lighting device 300 and a vehicle body 101 to which the lighting device 300 is attached. Specifically, in the vehicle 100, two lighting devices 300, which are fog lamps, are attached to the left and right of the front portion of the vehicle body 101. Two lighting devices 200 used as headlights are attached to the left and right of the front part of the vehicle body 101 above the lighting device 300 used as fog lights.

As described above, the lighting device 300 includes the light source unit 1, the case 301 that has the opening 302 and accommodates the light source unit 1 therein, and the translucency attached to the case 301 so as to close the opening 302. And a member (cover 303). Since the lighting device 300 includes the light source unit 1, the semiconductor light emitting element (LED 10) and the lighting circuit 20 are properly radiated, and the heat radiation performance is improved.

The vehicle 100 also includes a lighting device 300 and a vehicle body 101 to which the lighting device 300 is attached. Since the lighting device 300 includes the light source unit 1, the semiconductor light emitting element (LED 10) and the lighting circuit 20 are properly radiated, and the heat radiation performance is improved.

Further, in the lighting device 300, the opening 302 may be on the front side of the case 301, and the first heat dissipation plate 30 and the second heat dissipation plate 40 may be arranged as follows. The second heat dissipation plate 40 has a first surface 40a and a second surface 40b (see FIGS. 1A and 1B) in the thickness direction. The second surface 40b of the second heat dissipation plate 40 is arranged inside the case 301 so as to face the rear side of the case 301. The first heat dissipation plate 30 is arranged inside the case 301 at a position closer to the opening 302 than the second heat dissipation plate 40. The lighting circuit 20 (circuit board 25) is arranged on the first surface 40a of the second heat dissipation plate 40. With such an arrangement, the light source unit 1 can be compactly stored inside the case 301.

The lighting device 300 further includes a reflecting member 80. The semiconductor light emitting element (LED 10) is arranged on the surface (mounting surface 30a) close to the second heat dissipation plate 40 out of the two surfaces in the thickness direction of the first heat dissipation plate 30. The reflecting member 80 has a reflecting portion 82, and is arranged inside the case 301 at a position closer to the opening 302 than the second heat dissipation plate 40 so that the reflecting portion 82 faces the semiconductor light emitting element. There is. The reflecting portion 82 has a reflecting surface 82a whose distance from the first heat radiating plate 30 gradually increases from the rear end portion toward the front end portion, and the reflecting portion 82 of the reflecting member 80 and the second heat radiating portion 82a. The lighting circuit 20 (circuit board 25) is arranged between the board 40 and the board 40.

Accordingly, the lighting circuit 20 can be housed in the space formed between the reflection member 80 and the second heat dissipation plate 40, and the lighting device 300 can be downsized.

In addition, in the lighting device 300 of the present embodiment, the plurality of electric components 26 forming the lighting circuit 20 include a relatively tall electrical component (long component 26a) and a relatively short electrical component (short component). There is a body part 26b). Here, the circuit board is configured such that the distance L2 between the tall component 26a of the plurality of electric components 26 and the coupling member 50 is larger than the distance L1 between the short component 26b of the plurality of electrical components 26 and the coupling member 50. 25 (second heat dissipation plate 40).

As a result, mechanical interference between the electric component 26 and the reflection member 80 is unlikely to occur.

In addition, in the lighting device 300 of the present embodiment, the reflecting member 80 further includes a fixing portion 81 provided at the rear end of the reflecting portion 82 and fixed to the first heat dissipation plate 30. Since the reflecting member 80 is fixed to the first heat dissipation plate 30 on which the semiconductor light emitting element (LED 10) is mounted, the positional relationship between the semiconductor light emitting element and the reflecting member 80 can be accurately managed.

The vehicle 100 also includes a lighting device 300 and a vehicle body 101 to which the lighting device 300 is attached. Since the vehicle 100 includes the light source unit 1, the semiconductor light emitting element (LED 10) and the lighting circuit 20 are appropriately radiated, and the heat radiation performance is improved.

By the way, FIG. 5 and FIG. 9 show a lighting device 300, which is a fog lamp, including the light source unit 1. On the other hand, FIG. 11 shows a lighting device 200, which is a headlamp, including a light source unit 1a according to a modification of the present embodiment.

FIG. 11 is a cross-sectional view of the lighting device 200.

This lighting device 200 includes a light source unit 1a, a box-shaped case 201 having an opening 202, and a lens 203 (translucent member) that closes the opening 202 of the case 201 when attached to the case 201. Prepare

The light source unit 1a is housed inside the case 201. In the light source unit 1a, the LED 10 which is a semiconductor light emitting element is mounted on the surface 30b of the two surfaces 30a and 30b in the thickness direction of the first heat dissipation plate 30 which is far from the second heat dissipation plate 40. An insulating film is formed on the surface of the mounting surface 30b, and the LED 10 is mounted on the surface of the insulating film. Further, on the surface of the insulating film, a socket connector 32 and a circuit wiring (for example, a circuit wiring made of a metal film such as copper foil) for electrically connecting the socket connector 32 and the LED 10 are also formed. In the light source unit 1a, the same components as those of the light source unit 1 are designated by the same reference numerals and the description thereof will be omitted.

On the mounting surface 30b of the first heat dissipation plate 30, a reflecting member 80a that reflects the light emitted upward from the LED 10 to the front is attached. Since the reflecting member 80a has the same configuration as the reflecting member 80 in FIG. 5, the same reference numerals are given to the same components and the description thereof will be omitted.

The reflection member 80a is attached to the first heat dissipation plate 30 by screwing a screw 75, which is passed through the hole 81b of the fixing portion 81, into the screw hole 36 of the first heat dissipation plate 30. The reflection portion 82 of the reflection member 80 a projects forward and upward from the front end portion of the fixed portion 81. The reflecting portion 82 is formed in a cross-sectional shape such that the distance from the first heat dissipation plate 30 gradually increases from the rear end portion toward the front end portion. Of the two surfaces in the thickness direction of the reflecting portion 82, the surface closer to the LED 10 is the reflecting surface 82a that reflects the light of the LED 10. Since the reflecting surface 82a is a parabolic surface with the position of the LED 10 as the focal point, the light emitted from the LED 10 is reflected by the reflecting surface 82a and is emitted forward. The reflecting surface 82a is plated with silver, for example, to increase the reflectance. Although the fixing portion 81 is screwed to the first heat dissipation plate 30, the fixing portion 81 may be fixed to the first heat dissipation plate 30 by a method other than screwing. For example, the fixing portion 81 may be fixed to the first heat radiating plate 30 by an appropriate method such as welding, crimping, or snap fitting.

The case 201 is a molded product of synthetic resin such as PBT. The case 201 is formed in a box shape having an opening 202 on the front surface. The light source unit 1 a is housed inside the case 201 with the second heat dissipation plate 40 in contact with the rear wall of the case 201. The first heat dissipation plate 30 is disposed inside the case 201 at a position closer to the opening 202 than the second heat dissipation plate 40.

A through hole 204 for exposing the plug-in terminal 27 to the outside is provided on the rear wall of the case 201, and a cylindrical peripheral wall 205 is provided around the through hole 204. A female-side connection terminal 111 is provided at the tip of the power supply line 110 from the DC power source 120, and a tubular housing 112 is attached so as to surround the connection terminal 111. When the peripheral wall 205 is inserted into the housing 112, the female connection terminal 111 is connected to the male insertion terminal 27, and the DC power supply 120 is electrically connected to the lighting circuit 20. Further, when the peripheral wall 205 is inserted into the housing 112, the projection 206 provided on the outer surface of the peripheral wall 205 is caught in the recess provided on the inner side surface of the housing 112, so that the housing 112 and the peripheral wall 205 are separated from each other. The connection status is retained.

The lens 203 is made of a transparent synthetic resin (for example, polycarbonate) or glass, and closes the opening 202 when attached to the case 201. Direct light from the LED 10 or reflected light from the reflecting member 80a is incident on the lens 203, and the lens 203 controls the light distribution.

Further, the reflecting member 90 is attached to the surface 30a of the two surfaces 30a and 30b in the thickness direction of the first heat dissipation plate 30, which is closer to the second heat dissipation plate 40. The reflecting member 90 has a fixed portion 91 and a reflecting portion 92. The fixing portion 91 is screwed to the lower surface 30 a of the first heat dissipation plate 30 by using a screw 76. The reflecting portion 92 projects forward and downward from the front end portion of the fixed portion 91. The reflecting portion 92 is arranged in front of the second heat radiating plate 40 so that the second heat radiating plate 40 cannot be seen from the front. It is preferable that the surface 92a of the reflecting portion 92 on the side of the opening 202 is plated with silver, for example. Although the fixing portion 91 is screwed to the first heat radiation plate 30, the fixing portion 91 may be fixed to the first heat radiation plate 30 by a method other than screwing. For example, the fixing portion 91 may be fixed to the first heat dissipation plate 30 by an appropriate method such as welding, caulking fixing, or snap fitting. As described above, in the lighting device 200, the semiconductor light emitting device (LED 10) may be mounted on the surface 30b of the two surfaces 30a and 30b in the thickness direction of the first heat dissipation plate 30 that is far from the second heat dissipation plate 40. ..

Accordingly, it is possible to provide the illuminating device 200 in which the semiconductor light emitting element is mounted on the surface 30b of the two surfaces 30a and 30b in the thickness direction of the first heat dissipation plate 30 that is far from the second heat dissipation plate 40.

As is apparent from the above embodiment, the light source unit (1, 1a) according to the first aspect of the present invention includes the semiconductor light emitting element (10), the lighting circuit (20), and the first heat dissipation plate (30). , A second heat dissipation plate (40), a wiring member (29), and a connecting member (50). The lighting circuit (20) is configured to light the semiconductor light emitting device (10). The semiconductor light emitting device (10) is disposed on the first heat dissipation plate (30). A lighting circuit (20) is arranged on the second heat dissipation plate (40). The wiring member (29) electrically connects the semiconductor light emitting element (10) and the lighting circuit (20). A first heat dissipation plate (30) and a second heat dissipation plate (40) are attached to the connecting member (50), respectively. The connection member (50) has a lower thermal conductivity than the first heat dissipation plate (30) and the second heat dissipation plate (40).

The light source unit (1, 1a) of the second aspect of the present invention is based on the first aspect, and the connecting member (50) includes a first mounting surface (50a) and a first mounting surface (50a). And a second mounting surface (50b) having a positional relationship of intersecting. The first heat dissipation plate (30) is attached to the first attachment surface (50a), and the second heat dissipation plate (40) is attached to the second attachment surface (50)b.

The light source unit (1, 1a) of the third aspect of the present invention is based on the first or second aspect, and electrically connects the first radiator plate (30) and the second radiator plate (40). A conductive member (130) is further provided.

The light source unit (1, 1a) of the fourth aspect of the present invention is based on the third aspect, and the conductive member (130) includes a first heat sink (30) and a second heat sink (40). The amount of heat transferred between the first heat dissipation plate (30) and the second heat dissipation plate (40) through the conductive member (130) is smaller than the amount of heat transferred through the connection member (50). Is formed.

The light source unit (1, 1a) of the fifth aspect of the present invention is based on the third or fourth aspect, and the first heat dissipation plate (30) and the second heat dissipation plate (40) in the conductive member (130). The areas of the portions thermally coupled to and are smaller than the areas of the portions of the connecting member (50) that are in contact with the first heat radiating plate (30) and the second heat radiating plate (40 ), respectively.

The light source unit (1, 1a) of the sixth aspect of the present invention is based on any one of the third to fifth aspects, and the conductive member (130) has a flexible contact piece (133). )have. The contact piece (133) is in contact with the surface of one of the first heat radiating plate (30) and the second heat radiating plate (40), and the contact piece (133) is in contact with the surface of the first heat radiating plate (30) and the second heat radiating plate (40). A conductive member (130) is attached to the other side of the.

The light source unit (1, 1a) of the seventh aspect of the present invention is based on the sixth aspect, and the contact piece (133) of the first heat radiating plate (30) and the second heat radiating plate (40) is in contact. The heat dissipation plate has a first recess (33) into which the contact piece (133) is inserted.

The light source unit (1, 1a) of the eighth aspect of the present invention is based on any one of the first to seventh aspects, and has an electrical connection part (27) for energizing the lighting circuit (20). Is further equipped. The connecting member (50) has a second recess (53) into which a part of the electrical connection portion is inserted.

The light source unit (1, 1a) of the ninth aspect of the present invention is based on the eighth aspect, and the electrical connection portion (27) is electrically connected to the first terminal (111) of the power supply line 110. Has a second terminal (27) to be activated.

An illumination device (200, 300) according to a tenth aspect of the present invention has a light source unit (1, 1a) according to the first to ninth aspects, an opening (202, 302), and a light source unit (1) inside. ) Is stored in the case (201, 301) and the translucent member (203, 303) attached to the case (201, 301) so as to close the opening (202, 302).

The illumination device (200, 300) of the eleventh aspect of the present invention is based on the tenth aspect, and the openings (202, 302) are on the front side of the case (201, 301). The second heat dissipation plate (40) has a first surface (40a) and a second surface (40b) in the thickness direction. The second surface (40b) of the second heat dissipation plate (40) is arranged inside the case (201, 301) so as to face the rear side of the case (201, 301). The first heat dissipation plate (30) is arranged inside the case (201, 301) at a position closer to the openings (202, 302) than the second heat dissipation plate (40). The lighting circuit (20) is arranged on the first surface (40a) of the second heat dissipation plate (40).

An illumination device (300) according to a twelfth aspect of the present invention is based on the eleventh aspect and further includes a reflecting member (80). The semiconductor light emitting element (10) is arranged on the surface (mounting surface 30a) close to the second heat dissipation plate (40) among the two surfaces (30a, 30b) in the thickness direction of the first heat dissipation plate (30). The reflecting member (80) has a reflecting portion (82), and is located inside the case (301) at a position closer to the opening (302) than the second heat dissipation plate (40). Are arranged so as to face the semiconductor light emitting device (10). The reflection part (82) has a reflection surface (82a) whose distance from the first heat dissipation plate (30) gradually increases from the rear end toward the front end, and the reflection member (80). The lighting circuit (20) is arranged between the reflection part (82) and the second heat dissipation plate (40).

A lighting device (300) according to a thirteenth aspect of the present invention is based on the twelfth aspect, wherein the plurality of electric components (26) forming the lighting circuit (20) are among the plurality of electric components (26). The distance (L2) between the relatively tall electric component (26a) and the coupling member (50) is relatively short among the plurality of electrical components (26), and the coupling member (50). It is arranged to be larger than the distance (L1) from.

The illumination device (200) of the fourteenth aspect of the present invention is based on the eleventh aspect, and the second heat radiating plate (of the two surfaces (30a, 30b) in the thickness direction of the first heat radiating plate (30) ( The semiconductor light emitting element (10) is arranged on the surface (30b) far from the surface (40). The reflection member (80) has a reflection portion (82), and is arranged inside the case (201) so that the reflection portion (82) faces the semiconductor light emitting element (10). The reflection part (82) has a reflection surface (82a) such that the distance from the first heat dissipation plate (30) gradually increases from the rear end part toward the front end part.

A lighting device (200, 300) according to a fifteenth aspect of the present invention is based on any one of the twelfth to fourteenth aspects, and the reflecting member (80) is a rear end portion of the reflecting portion (82). It further has a fixing part (81) provided on the first heat radiating plate (30).

A vehicle (100) according to a sixteenth aspect of the present invention includes a lighting device (200, 300) according to any one of the tenth to fifteenth aspects, and a vehicle body (101) to which the lighting device (200, 300) is attached. Is equipped with.

1 Light source unit 10 LED (semiconductor light emitting element)
20 Lighting circuit 26 Electric component 26a Tall component (electric component)
26b Short parts (electrical parts)
27 Plug-in terminal (electrical connection, second terminal)
30 First heat dissipation plate 30a Mounting surface (surface close to second heat dissipation plate)
30b Mounting surface (surface far from the second heat sink)
40 2nd heat sink 40a 1st surface 40b 2nd surface 50 Connecting member 50a 1st mounting surface 50b 2nd mounting surface 80 Reflecting member 81 Fixed part 82 Reflecting part 82a Reflecting surface 110 Power supply line 111 Connection terminal (1st terminal)
130 Conductive member 133 Contact piece 200,300 Lighting device 201,301 Case 202,302 Opening 203 Lens (translucent member)
303 cover (translucent member)

Claims (15)

A semiconductor light emitting device,
A lighting circuit for lighting the semiconductor light emitting element,
A first heat dissipation plate formed of a metal material, on which the semiconductor light emitting element is arranged;
A second heat dissipation plate formed of a metal material, in which the lighting circuit is arranged,
A wiring member for electrically connecting the semiconductor light emitting element and the lighting circuit,
A connection member to which the first heat dissipation plate and the second heat dissipation plate are respectively attached;
A conductive member electrically connecting the first heat dissipation plate and the second heat dissipation plate,
The connection member has lower thermal conductivity than the first heat dissipation plate and the second heat dissipation plate,
In the conductive member, the amount of heat that moves through the conductive member between the first heat dissipation plate and the second heat dissipation plate causes the connecting member to move between the first heat dissipation plate and the second heat dissipation plate. It is formed to be smaller than the amount of heat that moves through it.
Light source unit. The connecting member has a first mounting surface and a second mounting surface in a positional relationship intersecting with the first mounting surface,
The first heat dissipation plate is attached to the first attachment surface,
The second heat dissipation plate is attached to the second attachment surface,
The light source unit according to claim 1. Areas of portions of the conductive member that are thermally coupled to the first radiator plate and the second radiator plate respectively contact the first radiator plate and the second radiator plate in the connecting member, respectively. Smaller than the area of
The light source unit according to claim 1 or 2. The conductive member has a flexible contact piece,
The contact piece is in contact with one surface of the first heat dissipation plate and the second heat dissipation plate,
The conductive member is attached to the other of the first heat dissipation plate and the second heat dissipation plate,
The light source unit according to claim 1. Of the first heat dissipation plate and the second heat dissipation plate, the heat dissipation plate with which the contact piece contacts has a first recess into which the contact piece is inserted.
The light source unit according to claim 4. Further comprising an electrical connection for energizing the lighting circuit,
The connection member includes a second recess into which a part of the electric connection portion is inserted.
The light source unit according to claim 1. The electrical connection portion has a second terminal electrically connected to the first terminal of the power supply line,
The light source unit according to claim 6. A semiconductor light emitting device,
A lighting circuit for lighting the semiconductor light emitting element,
A first heat dissipation plate formed of a metal material, on which the semiconductor light emitting element is arranged;
A second heat dissipation plate formed of a metal material, in which the lighting circuit is arranged,
A wiring member for electrically connecting the semiconductor light emitting element and the lighting circuit,
A connection member to which the first heat dissipation plate and the second heat dissipation plate are respectively attached;
A conductive member electrically connecting the first heat dissipation plate and the second heat dissipation plate,
The connection member has lower thermal conductivity than the first heat dissipation plate and the second heat dissipation plate,
The conductive member has a flexible contact piece,
The contact piece is in contact with one surface of the first heat dissipation plate and the second heat dissipation plate, and the conductive member is attached to the other of the first heat dissipation plate and the second heat dissipation plate. Cage,
Of the first heat dissipation plate and the second heat dissipation plate, the heat dissipation plate with which the contact piece contacts has a first recess into which the contact piece is inserted.
Light source unit. A light source unit according to claim 1;
A case that has an opening and stores the light source unit therein;
A translucent member attached to the case so as to close the opening,
Is equipped with
Lighting equipment. The opening is on the front side of the case,
The second heat dissipation plate has a first surface and a second surface in the thickness direction,
The second surface of the second heat dissipation plate is arranged inside the case so as to face the rear side of the case,
The first heat radiating plate is arranged inside the case at a position closer to the opening than the second heat radiating plate,
The lighting circuit is disposed on the first surface of the second heat dissipation plate,
The lighting device according to claim 9. Further comprising a reflective member,
The semiconductor light emitting element is arranged on one of the two surfaces in the thickness direction of the first heat dissipation plate, which is closer to the second heat dissipation plate,
The reflection member has a reflection portion, and is arranged inside the case at a position closer to the opening than the second heat dissipation plate so that the reflection portion faces the semiconductor light emitting element. Cage,
The reflecting portion has a reflecting surface such that the distance from the first heat dissipation plate gradually increases from the rear end portion toward the front end portion,
The lighting circuit is arranged between the reflection portion of the reflection member and the second heat dissipation plate,
The lighting device according to claim 10. Among the plurality of electric components that form the lighting circuit, a distance between the relatively tall electric component of the plurality of electric components and the connecting member is a relatively short electric component of the plurality of electric components. It is arranged to be larger than the distance between the component and the connecting member,
The lighting device according to claim 11. Further comprising a reflective member,
The semiconductor light emitting element is disposed on a surface of the two surfaces in the thickness direction of the first heat dissipation plate, which is far from the second heat dissipation plate,
The reflecting member has a reflecting portion, and the reflecting portion is arranged inside the case so as to face the semiconductor light emitting element,
The reflecting portion has a reflecting surface such that the distance from the first heat dissipation plate gradually increases from the rear end portion toward the front end portion.
The lighting device according to claim 10. The reflection member further includes a fixing portion provided at the rear end portion of the reflection portion and fixed to the first heat dissipation plate.
The lighting device according to any one of claims 11 to 13. A lighting device according to any one of claims 9 to 14,
A vehicle body to which the lighting device is attached,
Is equipped with
vehicle.

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