JP6476663B2 - Vehicle lighting - Google Patents

Description

  The present invention relates to a vehicular lamp using a semiconductor light emitting unit.

  In a vehicular lamp used in a vehicle, it is considered to use a semiconductor-type light emitting unit as a light source (see, for example, Patent Document 1). The vehicular lamp is provided with a semiconductor-type light emitting portion at an installation location integrally formed with the bracket, a heat sink member is provided on the back side of the bracket, and an optical member is provided on the front side of the bracket via a lens support member. A projection lens is supported. In a vehicular lamp, light emitted from a semiconductor-type light emitting unit is emitted from a projection lens (optical member) to irradiate the front with a predetermined light distribution pattern. And in a vehicle lamp, the heat which generate | occur | produces in a semiconductor type light emission part is thermally radiated with a heat sink member through a bracket from an installation location. For this reason, in the vehicular lamp, it is possible to prevent the light emission life of the semiconductor light emitting unit from being shortened or the light emission efficiency from being lowered due to the temperature rise.

JP 2012-230834 A

  By the way, in the above-mentioned vehicle lamp, since the light emitted from the semiconductor-type light emitting portion has almost no heat, the projection lens (optical member) is replaced with a glass material in order to reduce the overall weight. It is possible to use what was formed with the resin material. Here, in the vehicular lamp, the heat generated in the semiconductor light emitting unit is transmitted from the installation location to the projection lens through the bracket provided with the heat sink member and the lens support member. This is not a problem when the projection lens is formed of a glass material because the projection lens has a high heat-resistant temperature.

  However, a projection lens formed of a resin material has a lower heat-resistant temperature than a projection lens formed of a glass material, and thus may be deformed when heat is transmitted through the bracket and the lens support member. For this reason, in a vehicle lamp, when a projection lens formed of a resin material is used as an optical member, there is a risk that the projection lens mounting accuracy may be reduced due to heat generated in the semiconductor-type light emitting unit. There is a risk that defects will occur.

  The present invention has been made in view of the above circumstances, and prevents a decrease in mounting accuracy of an optical member due to heat even when an optical member formed of a resin material is mounted on a heat sink member. An object of the present invention is to provide a vehicular lamp that can be used.

A vehicular lamp according to the present invention includes a semiconductor light emitting unit, a heat sink member to which the semiconductor light emitting unit is attached, and an optical member that irradiates light emitted from the semiconductor light emitting unit with a predetermined light distribution pattern. The heat sink member is provided with an attachment location for attaching the optical member, and the attachment location is provided with a step groove that forms a space between the attached optical member.

  The mounting location may have a mounting surface with which the optical member is contacted by a surface, and the step groove may be provided by partially cutting the mounting surface.

  The step groove may have a configuration in which an intermediate position of the mounting surface is partially cut out.

  The space may be configured to be open to the outside of the heat sink member in a state where the optical member is attached to the attachment location.

  The said space is good also as a structure open | released to the irradiation side in the state in which the said optical member was attached to the said attachment location.

  The space may be configured to open upward in a state where the optical member is attached to the attachment location.

  The step grooves may be configured to be paired up and down with respect to the optical member.

  The optical member includes a projection lens that molds light emitted from the semiconductor light emitting unit into a predetermined light distribution pattern, a part of the light emitted from the semiconductor light emitting unit through the opening, and the other part. A shielding plate member shielded by the shielding portion, and the projection lens can be attached to the attachment location via the shielding plate member.

  The optical member may include a projection lens that molds light emitted from the semiconductor light emitting unit into a predetermined light distribution pattern, and the projection lens is attached to the attachment location.

  According to the vehicular lamp of the present invention, since the contact area of the optical member to the heat sink member can be reduced and heat transfer can be suppressed, the optical member formed of a resin material is attached to the heat sink member. Even if it exists, the fall of the attachment precision of the optical member resulting from a heat | fever can be prevented.

  The mounting portion has a mounting surface with which the optical member is brought into contact with the surface, and the step groove forms a space when there is a configuration in which the mounting surface is partially cut away. An optical member can be stably attached to an attachment location.

  If the step groove has a configuration in which an intermediate position of the attachment surface is partially cut away, the optical member can be attached to the attachment location more stably while forming a space.

  In the state where the optical member is attached to the attachment location, the space is configured to be open to the outside of the heat sink member, and air is supplied from the outside to each space (each step groove). The air can be taken in or discharged from each space (each stepped groove) to the outside, and the mounting location can be cooled more effectively.

  If the space is configured to be open to the irradiation side in a state where the optical member is mounted at the mounting location, air that is less affected by heat released by the heat sink member is taken into each space (each step groove). It is possible to cool the attachment location more effectively.

  When there is a configuration in which the space is open to the upper side in a state where the optical member is mounted at the mounting location, the space is more effective for the heat radiated from the mounting location to the corresponding space (step groove). Therefore, each attachment location can be cooled more effectively.

  If the step groove is configured to be paired up and down with respect to the optical member, the mounting location can be cooled from both the top and bottom directions, so that the mounting location is more effectively cooled. be able to.

  The optical member includes a projection lens that molds light emitted from the semiconductor light emitting unit into a predetermined light distribution pattern, a part of the light emitted from the semiconductor light emitting unit through the opening, and the other part. And having a configuration in which the projection lens is attached to the attachment location via the shielding plate member, the projection lens is deformed by heat transmitted from the attachment location. Can be more effectively prevented, and a reduction in the accuracy of attaching the projection lens to the heat sink member (attachment location) via the shielding plate member can be more effectively prevented.

  The optical member has a projection lens that molds light emitted from the semiconductor-type light emitting unit into a predetermined light distribution pattern, and heat transmitted from the attachment location is configured so that the projection lens is attached to the attachment location. Therefore, it is possible to more effectively prevent the projection lens from being deformed, and it is possible to more effectively prevent a reduction in the accuracy of attaching the projection lens to the heat sink member (attachment location).

It is explanatory drawing which shows a mode that the vehicle lamp 10 of Example 1 which concerns on this invention was mounted in the vehicle 50. FIG. It is a perspective view which shows a mode that the vehicle lamp 10 was seen from the front side. FIG. 2 is a schematic perspective view showing the components of the vehicular lamp 10 in an exploded manner. It is a front view which shows a mode that the heat sink member 11 of the vehicle lamp 10 was seen from the front. It is a front view which shows a mode that the vehicle lamp 10 was seen from the front. It is explanatory drawing shown with the cross section obtained along the II line | wire of FIG. 5 in order to demonstrate the mode of the space 43 formed by the level | step difference groove | channel 28. FIG. It is explanatory drawing shown in the cross section obtained along the II-II line | wire of FIG. 5 in order to demonstrate the mode of the space 43 formed by the level | step difference groove | channel 28, and the part shown with a circle is expanded partially and shown. .

  Embodiments of a vehicular lamp according to the present invention will be described below with reference to the drawings.

  A vehicle lamp 10 of Example 1 as an example of a vehicle lamp according to the present invention will be described with reference to FIGS. 1 to 7. As shown in FIG. 1, the vehicular lamp 10 is mounted on a vehicle 50 such as an automobile in order to irradiate the front. The vehicular lamps 10 are provided on the left and right sides (10L, 10R) in pairs at the front end of the vehicle 50, and are configured to be symmetrical and substantially equal to each other. In the following, since the left and right vehicle lamps 10 are symmetrical and substantially equal to each other, only the vehicle lamp 10L provided on the left side will be described, and the right vehicle lamp 10R will be omitted. The configuration will be described as a vehicular lamp 10. In the following description, the front-rear direction, the left-right direction, and the up-down direction (see arrows in each figure) viewed from the driver in the vehicle 50 to be attached are used.

  As shown in FIGS. 2 and 3, the vehicular lamp 10 is configured by attaching a semiconductor light emitting unit 12 (see FIG. 3 and the like), a shielding plate member 13, and a projection lens 14 to a heat sink member 11. The heat sink member 11 radiates heat generated in the semiconductor light emitting unit 12 and is formed of a material having high thermal conductivity such as resin or metal die casting. In the first embodiment, aluminum in the metal die casting is used. It is formed by die casting. In the heat sink member 11, a light emitting part installation location 21 (see FIG. 3) for installing the semiconductor light emitting part 12 is provided, and a plurality of heat radiation fins 22 for radiating heat generated in the semiconductor light emitting part 12 are provided. Provided.

  As shown in FIG. 3 and FIG. 4, the light emitting portion installation location 21 is provided at the front end of the heat sink member 11 and is a flat surface including the front-rear direction and the left-right direction. In this light emitting part installation location 21, the semiconductor type light emitting part 12 is installed through a light emitting substrate 31 described later. Each radiation fin 22 has a plate shape along the front-rear direction and the up-down direction behind the light-emitting portion installation location 21 and is provided in parallel in the left-right direction.

  In the heat sink member 11, a mounting portion 23 and a heat transfer reduction groove 24 are provided from the outside by making a pair in the left-right direction across the light emitting portion installation location 21 at the front end. As will be described later, the pair of attachment locations 23 constitutes a location where the projection lens 14 (the lens attachment portion 38) is attached via the shielding plate member 13 (the shielding plate attachment portion 34). In the first embodiment, each of the attachment points 23 is provided so as to have a flat attachment surface 25 including the front-rear direction and the left-right direction, a positioning protrusion 26 protruding forward from the attachment surface 25, and the attachment surface 25. Screw holes 27. In order to attach the shielding plate member 13, the attachment surface 25 makes it possible to contact the shielding plate attaching portion 34, which will be described later, with the surface. Each positioning protrusion 26 passes in a front-rear direction through a positioning hole 35 provided in a shielding plate attachment portion 34 described later of the shielding plate member 13 and a positioning hole 39 provided in a lens attachment portion 38 described later of the projection lens 14. Make it possible. Each screw hole 27 is provided with a screw groove on the inner peripheral surface, and can receive a shaft portion 42b of a screw member 42 described later.

  The pair of heat transfer reduction grooves 24 are formed so as to extend in the vertical direction while being recessed backward with respect to the light emitting portion installation location 21 and both attachment locations 23 (attachment surfaces 25 thereof). Each of the heat transfer reducing grooves 24 increases the distance of a path (heat transfer path) when transferring heat from the light emitting portion installation place 21 adjacent to each other when viewed in the left-right direction to the attachment place 23. It suppresses that the heat generated in the light emitting unit 12 is transmitted to the attachment location 23 (see FIG. 6 and the like).

  In the heat sink member 11, a step groove 28 is provided at the attachment location 23. The step groove 28 is formed by cutting out a part of the mounting surface 25 at the mounting location 23. In the first embodiment, the step groove 28 is provided at two locations above and below the right mounting portion 23 (referred to as 281 and 282 when individually described) when viewed from the front in FIG. Is provided above the mounting location 23 (indicated separately as 283 when individually described). In the first embodiment, each step groove 28 has a central portion viewed in the left-right direction on the mounting surface 25 while leaving an outer end portion 25a and an inner end portion 25b viewed in the left-right direction on the corresponding mounting surface 25. Are partially cut away (see FIG. 6 and the like). That is, each step groove 28 is provided by partially cutting the intermediate position on the mounting surface 25. Each of the step grooves 28 is formed so as to be recessed rearward with respect to the left and right end portions 25a and 25b of the mounting surface 25, and partially opens the front surface at the mounting location 23. Of these, the step groove 281 and the step groove 283 are formed to extend upward from the corresponding attachment locations 23 and open the upper surface of the heat sink member 11. Of these, the step groove 282 is formed to extend downward from the corresponding attachment location 23 and opens the lower surface of the heat sink member 11. Each step groove 28 partially overlaps the position of the shielding plate member 13 when viewed from the front when the shielding plate member 13 (shielding plate attachment portion 34) is attached to the attachment location 23 as will be described later. They are in a positional relationship (see the shielding plate member 13 indicated by a two-dot chain line in FIG. 4 and FIG. 5). For this reason, the step groove 28 reduces the contact area of the mounting surface 25 to the shielding plate member 13 (the shielding plate attachment portion 34).

  The heat sink member 11 is provided with three attachment pieces 29 having a plate shape. Each attachment piece 29 is provided so as to partially protrude in the left-right direction, and an attachment screw hole 30 is provided in each. Although not shown in the drawing, each of the attachment piece portions 29 can be fixed to the vehicle 50 (see FIG. 1) by a screw member through the attachment screw hole 30 so as to be adjustable. For this reason, the vehicular lamp 10 can be provided at the front end portion of the vehicle 50 via the mounting piece portions 29 of the heat sink member 11. The semiconductor-type light emitting unit 12 is installed at the light emitting unit installation location 21 of the heat sink member 11.

  The semiconductor type light emitting unit 12 forms a light source in the vehicular lamp 10 and is a self light emitting semiconductor type light emitting unit such as an LED or an organic EL (OLED). In the first embodiment, the semiconductor light emitting unit 12 uses an LED. The semiconductor light emitting unit 12 is provided by being mounted on the light emitting substrate 31. Although not shown, the light emitting substrate 31 is provided with a circuit for appropriately driving (turning on and off) the semiconductor light emitting unit 12, a connector for supplying power to the semiconductor light emitting unit 12, and the like. In the first embodiment, the light emitting substrate 31 is made of a material having good thermal conductivity, and a metal base substrate is used. The light emitting substrate 31 is fixedly installed at the light emitting part installation location 21 of the heat sink member 11 in a state where the semiconductor type light emitting part 12 is mounted. In the light emitting substrate 31, a connector (not shown) is connected, and the mounted semiconductor light emitting unit 12 is appropriately turned on and off to function as a light source. A shielding plate member 13 is provided so as to cover the semiconductor light emitting unit 12 (see FIG. 3).

  As shown in FIG. 3, the shielding plate member 13 is provided to hide the periphery of the semiconductor-type light emitting unit 12 provided at the light emitting unit installation location 21 of the heat sink member 11. The shielding plate member 13 has a plate-like shape that can be covered from one attachment location 23 through the light emitting portion installation location 21 to the other attachment location 23 in the front end face of the heat sink member 11. The shielding plate member 13 is formed of a member having a lower thermal conductivity than the heat sink member 11, and more preferably formed of a member having higher heat resistance (higher heat resistant temperature) than the projection lens 14. In the first embodiment, the shielding plate member 13 is formed of polycarbonate (PC).

  The shielding plate member 13 is provided with a shielding portion 32, an opening 33, and a shielding plate attachment portion 34 that makes a pair at the left and right ends thereof. The shielding portion 32 has a plate shape covering the front of the light emitting portion installation location 21 of the heat sink member 11, and an opening 33 is provided through the shielding portion 32 in the front-rear direction. The opening 33 has a rectangular shape surrounding the semiconductor light emitting unit 12 (its emission surface) provided at the light emitting unit installation location 21. The shielding unit 32 cooperates with the peripheral shape of the opening 33 to form a predetermined light distribution pattern of light (light flux) that can be emitted from the semiconductor light emitting unit 12 and emitted from the projection lens 14. Unnecessary light (light flux) is prevented from reaching the projection lens 14. The opening 33 allows a predetermined light distribution pattern of light (light flux) that can be emitted from the semiconductor light emitting unit 12 and emitted from the projection lens 14 by partially passing the light (light flux) from the inside. The light (light flux) necessary to form the light reaches the projection lens 14.

  Both shielding plate mounting portions 34 have a flat plate shape including the front-rear direction and the left-right direction, and are provided with positioning holes 35 (only the front side is shown in FIG. 3) and mounting screw holes 36. The positioning hole 35 makes it possible to receive the positioning protrusion 26 provided at the attachment location 23 of the heat sink member 11 while making contact in a direction orthogonal to the front-rear direction. The attachment screw hole 36 can receive a shaft portion 42b of a screw member 42 described later. The projection lens 14 is provided so as to cover the shielding plate mounting portion 34.

  The projection lens 14 forms light (light beam) emitted from the semiconductor light emitting unit 12 and passing through the opening 33 of the shielding plate member 13 into a predetermined light distribution pattern and irradiates the front. For this reason, the projection lens 14 functions as an optical member that cooperates with the shielding plate member 13 to irradiate the light (light flux) emitted from the semiconductor light emitting unit 12 with a predetermined light distribution pattern. Since the light emitted from the semiconductor light emitting unit 12 has almost no heat, the projection lens 14 is formed using a resin material in order to reduce the weight of the projection lamp 14 and the weight of the vehicular lamp 10. doing. As the resin material used for the projection lens 14, polycarbonate (PC), methacrylic resin (PMMA), cyclic olefin polymer (PCO), or the like can be used. In Example 1, acrylic resin is used. The projection lens 14 includes a lens portion 37 and lens attachment portions 38 provided at both left and right ends thereof.

  The lens unit 37 is configured by a lens having a free curved surface, and transmits light (light beam) from the semiconductor-type light emitting unit 12 that has passed through the opening 33 of the shielding plate member 13, thereby distributing the light (light beam) to a predetermined distribution. The light pattern. Both lens attachment portions 38 have a flat plate shape including the front-rear direction and the left-right direction, and are provided with positioning holes 39 and attachment screw holes 41. The positioning hole 39 makes it possible to receive the positioning projection 26 provided at the attachment location 23 of the heat sink member 11 while making contact in a direction orthogonal to the front-rear direction. The mounting screw hole 41 can receive a shaft portion 42b of a screw member 42 described later.

  The projection lens 14 and the shielding plate member 13 are attached to the heat sink member 11 using a screw member 42. The screw member 42 has a head portion 42a having a disk shape and a shaft portion 42b having a columnar shape having an outer diameter smaller than the head portion 42a. The head 42 a has an outer diameter dimension that cannot pass inwardly between the mounting screw hole 41 of the lens mounting portion 38 of the projection lens 14 and the mounting screw hole 36 of the shielding plate mounting portion 34 of the shielding plate member 13. Yes. The shaft portion 42 b is provided with a screw groove on the outer peripheral surface, and has an outer diameter dimension that can be passed through the mounting screw hole 41 and the mounting screw hole 36. The screw member 42 can be fastened and fixed to the screw hole 27, that is, the light emitting portion installation location 21 by engaging the shaft portion 42 b with the screw hole 27 provided in the light emitting portion installation location 21 of the heat sink member 11. .

  In this vehicle lamp 10, first, as shown in FIG. 3, the semiconductor-type light emitting unit 12 is mounted on the light emitting substrate 31, and the light emitting substrate 31 is fixedly installed on the light emitting unit installation location 21 of the heat sink member 11. Thereafter, the projection lens 14 is superimposed on the shielding plate member 13 while the lens attachment portion 38 is directed to the shielding plate attachment portion 34 from the front side, and these are directed to the front surface of the heat sink member 11. At this time, the positioning protrusions 26 of the corresponding attachment locations 23 of the heat sink member 11 are passed through the positioning holes 35 of the shielding plate attachment portions 34 of the shielding plate member 13 and the positioning holes 39 of the lens attachment portions 38 of the projection lens 14. Then, each shielding plate attachment portion 34 of the shielding plate member 13 is brought into contact with the attachment surface 25 of the corresponding attachment location 23 on the surface. Thereafter, the shaft portion 42b of each screw member 42 is passed through the mounting screw hole 41 of each lens mounting portion 38 and the mounting screw hole 36 of each shielding plate mounting portion 34 from the front side, and the screw hole of each mounting location 23. Tighten to 27. Thus, the vehicular lamp 10 is assembled by attaching the shielding plate member 13 and the projection lens 14 to the heat sink member 11 provided with the semiconductor-type light emitting unit 12 (light emitting substrate 31) (see FIGS. 2 and 5).

  In the vehicular lamp 10, in the assembled state, each shielding plate attachment portion 34 of the shielding plate member 13 as an optical member is in surface contact with the attachment surface 25 of the corresponding attachment location 23. At each mounting location 23, the center (intermediate position) of each mounting surface 25 viewed in the left-right direction is partially cut away by each provided step groove 28. For this reason, as shown in FIG. 6, each shield plate mounting portion 34 is provided with each step groove 28 with both ends viewed in the left-right direction in contact with the end portion 25 a and the end portion 25 b. It is provided so as to bridge the groove 28 in the left-right direction. Therefore, at each attachment location 23, each step groove 28 forms a space 43 between each shielding plate attachment portion 34 of the shielding plate member 13, and each attachment surface 25 contacts each shielding plate attachment portion 34. The area is reduced.

  Further, in the vehicle lamp 10, in this assembled state, as shown in FIGS. 5 and 7, each space 43 (each step groove 28) is opened in front of the heat sink member 11. In addition, in the vehicle lamp 10, in this assembled state, the space 43 formed by the step groove 281 and the space 43 formed by the step groove 283 are opened above the heat sink member 11, and the step groove 282 The formed space 43 is opened below the heat sink member 11. For this reason, each space 43 (each step groove 28) is open to the outside of the heat sink member 11, and air can be taken in or discharged from the outside of the heat sink member 11.

  The vehicular lamp 10 assembled in this way is provided at the front end portion of the vehicle 50 (see FIG. 1) via each attachment piece portion 29 of the heat sink member 11. In the vehicular lamp 10, the projection lens 14 forms light (light beam) emitted from the semiconductor-type light emitting unit 12 and passed through the opening 33 of the shielding plate member 13 into light (light beam) having a predetermined light distribution pattern. To emit. Thereby, the vehicle lamp 10 can irradiate the front of the vehicle 50 with a predetermined light distribution pattern.

  In this vehicular lamp 10, a semiconductor-type light emitting portion 12 (light emitting substrate 31 provided with the light emitting portion 12) serving as a light source is provided in a heat sink member 11 (the light emitting portion installation location 21). For this reason, in the vehicular lamp 10, the heat generated in the semiconductor-type light emitting unit 12 (light-emitting substrate 31) can be radiated by the heat sink member 11, mainly the plurality of heat radiation fins 22, and the semiconductor-type light emitting unit 12 and the light emission It is possible to prevent the temperature of the substrate 31 from rising excessively.

  Here, in the vehicular lamp 10, since the light emitted from the semiconductor-type light emitting unit 12 has almost no heat, the projection lens 14 as an optical member is replaced with a glass material to reduce the weight. It is formed with. In this vehicular lamp 10, since the projection lens 14 (the lens mounting portion 38) and the shielding plate member 13 (the shielding plate mounting portion 34) as optical members are attached to the attachment location 23 of the heat sink member 11, Heat generated in the semiconductor-type light emitting unit 12 provided at the light emitting unit installation location 21 is transmitted to the shielding plate member 13 and the projection lens 14 (optical member) through the attachment location 23. Since the projection lens 14 formed of the resin material has a lower heat-resistant temperature than the projection lens formed of the glass material, there is a concern that the heat transmitted to the heat sink member 11 may be deformed when transmitted from the attachment location 23. . For this reason, in the vehicular lamp 10, for example, when the lens mounting portion 38 of the projection lens 14 attached to the attachment location 23 is deformed by the heat transmitted through the attachment location 23, the heat sink member 11 of the projection lens 14. There is a possibility that the mounting accuracy of the light source will be lowered, and there is a risk that a light distribution failure will occur. Here, in the projection lens formed of a glass material, since the heat-resistant temperature is high, there is no problem even if the heat of the heat sink member 11 is transmitted through the attachment portion 23.

  On the other hand, in the vehicular lamp 10 of the first embodiment of the vehicular lamp according to the present invention, the shielding plate member 13 (its shielding plate) as an optical member is provided by the step groove 28 provided in the attachment location 23 of the heat sink member 11. A space 43 is formed between the attachment portion 34) and the attachment location 23. Therefore, in the vehicular lamp 10, the contact area between the attachment location 23 of the heat sink member 11 and the optical member (the shielding plate member 13 (the shielding plate attachment portion 34)) attached thereto is defined as a step groove 28 (where it is formed). Space 43). As a result, in the vehicular lamp 10, the heat transfer path from the attachment location 23 to the optical member (the shielding plate member 13 (shielding plate attachment portion 34)) can be reduced, so the light emitting portion installation location 21 of the heat sink member 11. The heat of the semiconductor-type light emitting unit 12 provided in is transmitted to the optical member attached to the attachment location 23, that is, the shielding plate member 13 (shielding plate attachment portion 34) and the projection lens 14 (the lens attachment portion 38) attached via the optical member. Can be suppressed. Therefore, in the vehicular lamp 10, it is possible to prevent the projection lens 14 from being deformed by heat transmitted from the attachment location 23, so that the projection lens 14 is attached to the heat sink member 11 (attachment location 23). A reduction in accuracy can be prevented, and a light distribution failure can be prevented.

  In the vehicular lamp 10, a space 43 is formed between the optical member (the shielding plate member 13 (shielding plate attachment portion 34)) and the attachment location 23 by the step groove 28 provided in the attachment location 23 of the heat sink member 11. doing. For this reason, in the vehicular lamp 10, since the heat radiation surface (its area) at the attachment location 23 can be widened by the step groove 28 (space 43) provided at the attachment location 23, the attachment location 23 is effectively cooled. be able to. Thereby, in the vehicular lamp 10, heat transmitted from the mounting location 23 to the projection lens 14 (lens mounting portion 38) as an optical member can be suppressed, and the projection lens 14 is deformed by the heat. It can prevent more effectively.

  Furthermore, in the vehicular lamp 10, a step groove 28 is provided by partially notching the mounting surface 25 at the mounting location 23. For this reason, in the vehicular lamp 10, the portion not cut out by the step groove 28 in the mounting surface 25 can be brought into contact with the optical member (the shielding plate member 13 (the shielding plate attachment portion 34)), so that the space 43 is formed. The optical member, that is, the shielding plate member 13 (shielding plate attachment portion 34)) and the projection lens 14 (lens attachment portion 38) can be stably attached to the attachment location 23 while being formed.

  In the vehicular lamp 10, a step groove 28 is provided by partially notching the center (intermediate position) of the mounting surface 25 of the mounting location 23 as viewed in the left-right direction. For this reason, in the vehicular lamp 10, the left and right end portions (end portion 25a and end portion 25b) of the attachment surface 25 can be brought into contact with the optical member (the shielding plate member 13 (the shielding plate attachment portion 34)). The optical member, that is, the shielding plate member 13 (shielding plate attachment portion 34)) and the projection lens 14 (lens attachment portion 38) can be attached to the attachment location 23 more stably while forming the space 43.

  In the vehicle lamp 10, each space 43 (each step groove 28) is opened to the outside of the heat sink member 11 in the assembled state. Therefore, in the vehicular lamp 10, air is taken into each space 43 (each step groove 28) from the outside of the heat sink member 11, and air is discharged from each space 43 (each step groove 28) to the outside. Can be. Thereby, in the vehicle lamp 10, the attachment location 23 can be cooled more effectively.

  In the vehicular lamp 10, in the assembled state, each space 43 (each stepped groove 28) is opened to the front side that is the irradiation side, that is, the side to which the optical members (the shielding plate member 13 and the projection lens 14) are attached. For this reason, in the vehicular lamp 10, air that is less affected by the heat released by the heat sink member 11 can be taken into each space 43 (each step groove 28), and the mounting portion 23 can be cooled more effectively. . This is because the heat sink member 11 basically releases heat in a direction different from the front where the projection lens 14 is attached (the side on which the heat radiating fins 22 are provided).

  In the vehicle lamp 10, in the assembled state, the space 43 formed by the step groove 281 and the space 43 formed by the step groove 283 are opened above the heat sink member 11. For this reason, in the vehicular lamp 10, the heat radiated from the respective attachment locations 23 to the corresponding step grooves 281 (the spaces 43) or the step grooves 283 (the spaces 43) can be released more effectively. Each attachment location 23 can be cooled more effectively.

  In the vehicle lamp 10, in the assembled state, step grooves 28 (step grooves 281 and step grooves 283) are provided at a mounting portion 23 on the right side when viewed from the front so as to be paired in the vertical direction. For this reason, in the vehicular lamp 10, the attachment location 23 can be cooled from both the upper and lower directions, and therefore the attachment location 23 can be more effectively cooled.

  In the vehicular lamp 10, the optical member attached to the attachment location 23 of the heat sink member 11 includes the shielding plate member 13 and the projection lens 14, and the projection lens 14 (lens attachment portion 38) is the shielding plate member 13 (shielding plate). It attaches to the attachment location 23 via the attachment part 34). In the vehicle lamp 10, a space 43 is formed between the shielding plate member 13 (shielding plate attachment portion 34) and the attachment location 23. For this reason, in the vehicle lamp 10, heat transmitted from the attachment location 23 to the shielding plate member 13 (shielding plate attachment portion 34) can be reduced, and the shielding plate member 13 (shielding plate attachment portion 34) is in contact with the lamp. The heat transmitted to the projection lens 14 (lens mounting portion 38) can be reduced. Thereby, in the vehicular lamp 10, it is possible to more effectively prevent the projection lens 14 from being deformed by the heat transmitted from the attachment location 23, and the heat sink member 11 of the projection lens 14 via the shielding plate member 13. It is possible to more effectively prevent the attachment accuracy from being lowered to (attachment location 23).

  In the vehicular lamp 10, the shielding plate member 13 can be formed of a member having a lower thermal conductivity than the heat sink member 11, and more preferably a member having higher heat resistance than the projection lens 14. For this reason, in the vehicle lamp 10, the heat transmitted to the projection lens 14 (lens mounting portion 38) in contact with the shielding plate member 13 (shielding plate mounting portion 34) can be more effectively reduced. This can more effectively prevent the projection lens 14 from being deformed.

  Therefore, in the vehicular lamp 10 according to the first embodiment of the present invention, even when the projection lens 14 as an optical member formed of a resin material is attached to the heat sink member 11, the optical member (projection lens) caused by heat is used. 14) It is possible to prevent a decrease in the mounting accuracy.

  In the above-described embodiment, the vehicle lamp 10 as an example of the vehicle lamp according to the present invention has been described. However, the semiconductor-type light emitting portion, the heat sink member to which the semiconductor-type light emitting portion is attached, and the semiconductor-type light emission An optical member that irradiates the light emitted from the portion with a predetermined light distribution pattern, and the heat sink member is provided with an attachment location for attaching the optical member, and is attached to the attachment location Any vehicle lamp provided with a step groove that forms a space between the optical member and the optical member may be used, and the configuration is not limited to the above-described embodiment.

  In the above-described embodiment, the optical member attached to the attachment location 23 of the heat sink member 11 includes the shielding plate member 13 and the projection lens 14, and the projection lens 14 (lens attachment portion 38) is the shielding plate member 13 ( It is attached to the attachment location 23 via the shielding plate attachment portion 34). However, the projection lens 14 (lens mounting portion 38) as an optical member may be directly mounted on the mounting location 23 of the heat sink member 11, and the projection lens 14 (lens mounting portion 38) is mounted via another member. The structure attached to the location 23 may be sufficient and is not limited to the structure of the above-mentioned Example.

  Furthermore, in the above-described embodiment, each step groove 28 is partially cut away from the mounting surface 25 of the mounting location 23. However, each step groove 28 is a space between the mounting portion 23 and the optical member (shielding plate member 13 (shielding plate mounting portion 34)) and projection lens 14 (lens mounting portion 38)) attached to the mounting location 23. What is necessary is just to form 43, and is not limited to the structure of the above-mentioned Example.

  In the above-described embodiment, each step groove 28 is partially cut out at the center (intermediate position) viewed in the left-right direction on the mounting surface 25 of the mounting location 23. However, each step groove 28 only needs to partially cut out the attachment surface 25 of the attachment location 23, and is not limited to the configuration of the above-described embodiment.

  In the above-described embodiment, each space 43 (each step groove 28) is opened to the front side on the irradiation side, that is, the side on which the optical members (the shielding plate member 13 and the projection lens 14) are attached. However, each space 43 (each step groove 28) is not limited to the configuration of the above-described embodiment as long as it is open to the outside of the heat sink member 11.

  In the embodiment described above, the space 43 formed by the step groove 281 and the space 43 formed by the step groove 283 are opened above the heat sink member 11. However, each space 43 (each step groove 28) is not limited to the configuration of the above-described embodiment as long as it is open to the outside of the heat sink member 11.

  In the above-described embodiment, the step grooves 28 (step grooves 281 and step grooves 283) are provided at the attachment portion 23 on the right side when viewed from the front so as to be paired in the vertical direction. However, each step groove 28 is provided between the mounting portion 23 and the optical member (shielding plate member 13 (shielding plate mounting portion 34)) and projection lens 14 (lens mounting portion 38) attached to the mounting location 23. As long as the space 43 is formed, it may be provided only in one side (upward in the left side mounting location 23) as in the left side mounting location 23 in front view, or may be provided in the left-right direction. However, the present invention is not limited to the configuration of the embodiment.

  In the above-described embodiment, the vehicular lamp 10 used as a headlamp for a vehicle (vehicle 50) is shown. However, the vehicular lamp according to the present invention may be provided, for example, as an auxiliary lamp for forming a light distribution pattern in an auxiliary manner in a headlamp, or may be provided as a fog lamp. Other lamps used in the above may be used, and the configuration is not limited to the above-described embodiment.

  The vehicular lamp of the present invention has been described based on the embodiments. However, the specific configuration is not limited to the embodiments, and design changes and additions are allowed without departing from the gist of the present invention. Is done.

DESCRIPTION OF SYMBOLS 10 (10R, 10L) Vehicle lamp 11 Heat sink member 12 Semiconductor type light emission part 13 Shielding plate member (as an example of an optical member) 14 Projection lens (As an example of an optical member) 23 Mounting location 25 Mounting surface 28 (281, 281) 282, 283) Step groove 33 Opening 43 Space

Claims (8)

A semiconductor light emitting unit;
A heat sink member to which the semiconductor-type light emitting unit is attached;
An optical member that irradiates the light emitted from the semiconductor light emitting unit with a predetermined light distribution pattern, and
The heat sink member is provided with an attachment location for attaching the optical member,
The mounting portion is a flat surface, and has a mounting surface with which the mounting portion of the optical member is contacted by the surface,
The mounting portion is provided with a step groove formed by partially cutting the mounting surface and forming a space between the mounting portion and the mounting portion that is mounted in contact with the mounting surface . A vehicular lamp characterized by the above. Before Kidan Samizo The vehicle lamp according to claim 1, characterized in that provided by cutting an intermediate position of the mounting surface partially. 3. The vehicular lamp according to claim 1 , wherein the space is open to the outside of the heat sink member in a state where the optical member is attached to the attachment portion . 4. The vehicular lamp according to claim 3 , wherein the space is open to the irradiation side in a state where the optical member is attached to the attachment location. 5. The vehicular lamp according to claim 3 , wherein the space is opened upward in a state where the optical member is attached to the attachment portion. The vehicular lamp according to any one of claims 1 to 5, wherein the step groove is provided in a pair with the optical member in the vertical direction . The optical member includes a projection lens that molds light emitted from the semiconductor light emitting unit into a predetermined light distribution pattern, a part of the light emitted from the semiconductor light emitting unit through the opening, and the other part. It includes a shielding plate for shielding a shielding portion, to any one of claims 1 to 6, wherein the projection lens through the shield member and said Rukoto attached to the attachment point The vehicle lamp as described. The optical member, from claim 1, wherein the light emitted from the semiconductor light emitting unit has a projection lens for forming a predetermined light distribution pattern, before Symbol projection lens, characterized in that attached to the attachment point The vehicular lamp according to claim 6 .