JP6536101B2 - Vehicle lamp - Google Patents

Description

  The present invention relates to a vehicle lamp.

  Conventionally, in the lamp chamber formed by the front lens and the housing, as a structure for fixing the heat sink to the housing, the rear portion of the radiation fin provided on the first heat sink disposed in the lamp chamber is sandwiched by the back cover Patent Document 1 discloses a vehicle lamp screwed to a second heat sink outside the lamp chamber.

In such a lamp, the first heat sink and the second heat sink are fixed by sandwiching the back cover. In order to fix the first heat sink and the second heat sink with high accuracy, it is necessary to align their positions, which requires high positional accuracy.
In addition, although heat dissipation effects can be obtained by fixing heat dissipation members such as heat sinks with the back cover in between, each member is deformed by expansion or contraction under the influence of heat, causing positional deviation. There is also a possibility that it may lead to the deterioration of the light performance.
Furthermore, since the radiation fin provided at the rear end of the first heat sink in the lamp chamber and the second heat sink outside the lamp room are screwed from the rear side, a space between the back cover and the first heat sink As a result, it was difficult to provide a gap for adjusting the optical axis of the lamp unit as well as the heat radiation effect due to the convection in the lamp chamber was hindered.

JP, 2007-220619, A

  The present invention has been made in view of the above problems, and when fixing a lamp unit having an LED as a light source to a housing of a vehicle lamp, the lamp unit is fixed to the lamp chamber directly while the heat sink is fixed to the housing. It is an object of the present invention to provide a vehicle lamp which can be installed in a small space.

The present invention is grasped by the following composition in order to solve the above-mentioned subject.
(1) In a vehicle lamp provided in a lamp room consisting of an outer lens and a housing, a light source for emitting light, an optical member for emitting light from the light source to the vehicle front side, the light source and the optical member are mounted A heat sink having a mounting surface (base portion) to be placed and a plurality of heat radiation fins extending to the rear side of the vehicle at the rear of the mounting surface, the heat radiation located at the end of the heat sink among the plurality of heat radiation fins The fin is provided with a housing attachment portion for attaching the heat sink to the housing, and one of the housing attachment portions is provided on the tip end side of the radiation fin, and the other is on the mounting surface side of the radiation fin A vehicle lamp characterized in that it is provided.

(2) In the configuration of the above (1), the light source is mounted on the light source mounting portion of the mounting surface such that the emission optical axis faces the front or side of the vehicle, and the mounting surface is the light source The vehicle according to claim 1, wherein the plurality of heat radiation fins are provided in a row in the vehicle width direction on the back surface side of the mounting surface so as to be orthogonal to the emission optical axis. Lamp.

(3) In the configuration of the above (2), (wherein the light source is mounted on the light source mounting portion of the mounting surface so that the emission optical axis faces the vehicle side, and the mounting surface is the emission light of the light source The housing mounting portion is formed on the mounting surface side of the heat radiation fin on the vehicle outer side, and is formed on the tip end side of the heat radiation fin on the vehicle inner side. The vehicle lamp according to claim 2, characterized in that:

(4) In the configuration of (2), the light source is mounted on the light source mounting portion of the mounting surface such that the emission optical axis faces the front of the vehicle, and the mounting surface is the emission optical axis of the light source The housing mounting portion is formed on the mounting surface side of the heat radiation fin on the vehicle inner side, and is formed on the tip end side of the heat radiation fin on the vehicle outer side. The vehicular lamp according to claim 2, wherein

(5) In the configuration of the above (3) or (4), a leg mounting portion to which the optical member is attached is provided at a portion outside the light source mounting portion of the mounting surface of the heat sink The vehicle lamp according to claim 3 or 4, wherein a groove recessed toward the plurality of radiation fins is formed between the light source mounting portion and the leg mounting portion.

  According to the present invention, when fixing the lamp unit having the LED as the light source to the housing of the vehicle lamp, the heat sink can be installed in a small space without installing the heat sink outside, and the heat radiation effect of the heat sink Thus, it is possible to provide a vehicle lamp capable of improving the

1 is a perspective view of a vehicle lamp according to an embodiment of the present invention. It is a perspective view which shows the lamp unit of the vehicle lamp of FIG. It is a disassembled perspective view of the lamp unit of FIG. (A) is a front view of the heat sink of the lamp unit, (b) is a cross-sectional view taken along the line AA of (a), (c) is a cross-sectional view taken along the line BB of (a), (d) is (a) It is a CC arrow directional cross-sectional view of. It is DD arrow sectional drawing as described in FIG. 4 (a). It is a perspective view at the time of attaching the lamp unit of this invention to a housing.

Hereinafter, modes for carrying out the present invention (hereinafter, referred to as “embodiments”) will be described in detail based on the attached drawings.
In this specification, front, rear, upper, lower, left, and right indicate directions as viewed from a driver who gets on the vehicle when the vehicle lamp is mounted on the vehicle. Moreover, the same number is attached | subjected to the same element through the whole description of embodiment.

As shown in FIG. 1, the vehicle lamp of this embodiment is the vehicle lamps 101R and 101L disposed on the front side of the vehicle 102, and in the following description, the vehicle lamp will be described unless otherwise noted. The right side of the vehicle lamp 101R will be described.
FIG. 2 shows the lamp unit 1 disposed in the vehicle lamp 101R. The lamp unit is not shown, but the lamp housing 5 and the opening of the lamp housing 5 are open on the front side of the vehicle. And an outer lens attached so as to close the light source.

  FIG. 3 is an exploded perspective view of the lamp unit 1. As shown in FIG. 3, the lamp unit 1 includes a semiconductor light source 12, a lens 30 disposed on the front side of the semiconductor light source 12, and a shade 20 disposed between the semiconductor light source 12 and the lens 30. And a heat sink 10 on which the semiconductor light source 12, the lens 30, and the shade 20 are disposed.

(Semiconductor type light source)
The semiconductor-type light source 12 is, for example, a self-emitting semiconductor-type light source such as an LED or an EL (organic EL) having a light emitting chip 12a mounted on a substrate 12b as shown in FIG. The light emitting chip 12a may be sealed and packaged with a sealing resin. In addition, a connector for supplying current to the substrate 12b is attached. The substrate 12 b is attached to the light source attachment structure 112 provided in the light source attachment portion 111 of the heat sink 10.

The light emitting chip 12a has, for example, a plurality of square chips arranged in the horizontal direction.
Note that the number of chips is not limited to square, and may be rectangular, and the number of chips to be used is not limited to plural and may be one.

(lens)
The lens 30 includes a lens portion 31 and leg portions 32a and 32b. The lens unit 31 is formed of an entrance surface and an exit surface for emitting the light from the semiconductor type light source 12 as a predetermined light distribution pattern. As shown in FIG. 3, a pair of mounting leg portions 32a and 32b for mounting on the heat sink 10 are formed at the end portion in the vehicle width direction of the lens portion 31, and the end portions of the leg portions 32a and 32b are provided. The mounting structure 33a, 33b is provided with two through holes used for mounting on the fixing portions 11a, 11b provided on the leg mounting portions 113a, 113b of the heat sink 10.
For the lens 30, for example, a light transmitting material such as an acrylic resin or a polycarbonate resin can be suitably used.

(shade)
The shade 20 is disposed between the semiconductor-type light source 12 and the lens 30, as shown in FIG. 3, and has an opening 22 so that light from the semiconductor-type light source 12 is irradiated to the lens portion 31. The light passing through 22 enters the lens unit 31. On the other hand, the light emitted to the peripheral edge of the opening 22 is blocked by the shade 22 so as not to be incident on the lens portion 31, and the light that may be glare light to oncoming vehicles and the like is suppressed.

  Similarly to the lens 30, the shade 20 is formed with a pair of mounting portions 21a and 21b at the end in the vehicle width direction for mounting to the heat sink 10, and mounting portions of the heat sink 10 are mounted on the mounting portions 21a and 21b, respectively. Two through holes are provided which are used for attachment to the fixed portions 11a and 11b provided in the portions 113a and 113b. The mounting portions 21 a and 21 b of the shade 20 are sandwiched and fixed between the leg portions 32 a and 32 b of the lens 30 and the leg mounting portions 113 a and 113 b of the heat sink 10.

Similarly to the lens 30, the shade 20 can be suitably made of, for example, an acrylic resin, a polycarbonate resin, or the like. However, since it is necessary to shield light, coloring or the like is performed. The shade 20 is not limited to resin, and may be metal or the like.
In addition, the shade 20 does not necessarily need to be provided, and therefore, there may be a lamp unit 1 in which the shade 20 is not provided.

(heatsink)
The heat sink 10 is made of a metal member or a resin member having high thermal conductivity, and is made of aluminum die gast in the present embodiment.
As shown in FIG. 3, the mounting surface 110 for mounting the semiconductor-type light source 12, the lens 30 and the shade 20 is provided to face the vehicle front side, and the back surface of the mounting surface 110 (vehicle rear side) A plurality of heat radiation fins 114 aligned in the vehicle width direction is formed to extend rearward of the vehicle. The placement surface 110 may be provided so as to incline to the side of the vehicle if it is the front side of the vehicle.

In the mounting surface 110, a light source mounting portion 111 is provided at the center, and a pair of leg portion mounting portions 113a and 113b substantially flush with the light source mounting portion 111 are provided on both sides of the light source mounting portion 111. It is done.
As shown in FIG. 3, between the light source mounting portion 111 and the leg portion mounting portions 113a and 113b, a pair of light source mounting portions 111 and the leg portion mounting portions 113a and 113b extend in the vertical direction of the vehicle so as to be separated. Grooves 116a and 116b are provided. The grooves 116 a and 116 b have a shape that is recessed toward the plurality of heat radiation fins 114.

The structure of the heat sink 10 will be described in more detail with reference to FIG.
FIG. 4A is a front view of the heat sink 10 from which the lens 30 and the shade 20 are omitted from the lamp unit 1, and FIG. 4B is a cross-sectional view taken along the line A-A of FIG.

  As can be seen from FIG. 4B, in the grooves 116a and 116b, bridge portions 115a and 115b are provided in the middle of the radiation fins 114 extending to the rear side of the vehicle (the lower side of the drawing). The light source mounting portion 111 and the leg portion mounting portions 113a and 113b are connected by the portions 115a and 115b while keeping the grooves 116a and 116b apart.

  Further, in the present embodiment, as shown in FIG. 3, the pair of reinforcing plate portions 117a, 117a, 113b, 113b, 113b, 113b, and 113b prevents the deformation such as changing the separation distance when stress is applied to the leg mounting portions 113a and 113b. A portion 117b is provided to pass between the radiation fin 114 on the side of the light source mounting portion 111 sandwiching the grooves 116a and 116b and the radiation fin 114 on the side of the leg mounting portion 113a and 113b.

4 (c) shows a cross-sectional view taken along the line B-B in FIG. 4 (a), and FIG. 4 (d) shows a cross-sectional view taken along the line C-C in FIG. 4 (a). is there.
In each of FIGS. 4C and 4D, the right side in the drawing is the vehicle rear side, and the left side is the vehicle front side.

As shown in FIGS. 4C and 4D, the reinforcing plate portions 117a and 117b are provided on the vehicle rear side from the bridge portions 115a and 115b.
Further, as shown in FIG. 3, the reinforcing plate portions 117 a and 117 b are provided to pass between the end portions on the vehicle upper side of the radiation fin 114. The reinforcing plate portions 117a and 117b may be provided so as to pass between the end portions on the vehicle lower side of the radiation fins 114.

  Further, as shown in FIG. 3, in the present embodiment, the leg mounting portions 113a and 113b are provided with a pin structure extending in the vehicle front side for fixing the lens 30 and the shade 20 and a spiral groove for a screw. The fixing parts 11a and 11b which consist of a hole are provided.

  The mounting structure of the heat sink 10 to the housing 5 will be described with reference to FIG. 5 (cross-sectional view taken along line DD in FIG. 4) and FIG. 6 for the side illumination lamp (for example, cornering lamp). Housing attachment portions 118 a and 118 b are provided on the radiation fins 114 located on the outer side in the vehicle width direction of the heat sink 10 and at the left and right ends of the semiconductor-type light source 12.

  The housing attachment portion 118a is provided at two locations above and below the radiation fin 114 disposed inside the vehicle, and the housing attachment portion 118b disposed outside the vehicle is provided at one location above the radiation fin 114 outside the vehicle ing. In the present embodiment, it has been described that the housing attachment portions 118a and 118b are provided at two locations inside the vehicle and at one location outside the vehicle.

  The housing attachment portion 118a is joined by a plate-like member extending from the heat radiation fin 114, and a reinforcing rib 119 is formed between the upper and lower housing attachment portions 118a.

  The housing attachment portion 118a formed inside the vehicle is formed at a tip end side of the radiation fin 114 and at a position separated from the light source mounting portion 111, and the housing attachment portion 118b formed outside the vehicle is a radiation fin 114. It is formed at a position close to the light source mounting portion 111 at the base side of the light source. Therefore, when the side irradiation lamps are arranged to be directed to the side, the housing attachment portions 118a and 118b can be set at a position close to the surface of the housing 5.

  The housing 5 is provided with bosses 51 for mounting the housing mounting portions 118a and 118b of the heat sink 10, and the housing mounting portions 118a and 118b of the heat sink 10 are mounted on the housing 5 from the vehicle front side by the screw 52. It has become.

  The housing attachment portions 118a and 118b each include a surface facing in the forward direction of the vehicle and a through hole extending in the axial direction of the vehicle. When fixing the heat sink 10 to the housing 5, the screws 52 against the boss 51 from the forward direction of the vehicle. It can be assembled by As a result, even when the vehicle lamp 101R is largely slanted and the mounting surface 110 of the lamp unit 1 is inclined with the vehicle axis, the vehicle lamp can be easily assembled from the front of the vehicle, so that the assembling property is excellent. .

  In the present embodiment, the light source mounting portion 111 is provided with the side facing the vehicle inclined such that the surface on which the semiconductor type light source 12 is mounted intersects the vehicle axis. Even in such a case, the mounting direction when mounting the heat sink 10 to the housing 5 is substantially the same as the vehicle axis, it is easy to mount the heat sink 10 from the opening side of the housing 5 in front of the vehicle.

  In addition, when the heat sink 10 is attached to the housing 5, the radiation fin 114 of the heat sink 10 is accommodated, and an accommodation portion 53 for forming a space between the housing 5 and the heat sink 10 is formed.

  The accommodation portion 53 accommodates the radiation fin 114 provided so as to extend rearward of the mounting surface 110, and in the horizontal cross section, a plurality of tip portions of the radiation fin 114 and the accommodation portion 53 of the housing 5 are arranged. The intervals are formed to be approximately equal intervals. For this reason, even when the heat sink 10 is directly fixed to the housing 5, a space is formed between the heat sink 10 and the housing 5, and it is possible to improve the heat dissipation effect of the heat sink 10 by the convection of air in the lamp chamber.

  A method of assembling the lamp unit 1 will be described. First, the semiconductor type light source 12 is attached to the light source attachment structure 112 of the light source attachment portion 111 of the heat sink 10, and then the heat sink 10 is attached to the boss 51 of the housing 5 via the through holes provided in the housing attachment portions 118a and 118b. It is fixed by the screw 52 from the vehicle front side.

  Then, a pin structure extending to the vehicle front side of the fixing portions 11a and 11b of the heat sink 10 is inserted into the upper through holes provided in the mounting portions 21a and 21b of the shade 20 and the mounting structures 33a and 33b of the lens 30. Screws 40a and 40b are provided through the lower through holes provided in the attachment portions 21a and 21b of the shade 20 and the attachment structures 33a and 33b of the lens 30, and spiral grooves for screws of the fixing portions 11a and 11b of the heat sink 10 are provided. By screwing the shade 20 and the lens 30 to the leg mounting portions 113a and 113b of the heat sink 10 by screwing them together, the lamp unit 1 shown in FIG. 2 is assembled.

(Operation and effect of the present embodiment)
As shown in FIGS. 2 and 5, the heat sink 10 of the lamp unit 1 is provided with housing attachment portions 118 a and 118 b on the fins outside the plurality of heat dissipating fins 114.
When the heat sink 10 is attached to the housing 5, the heat sink 10 is directly attached to the housing 5 by providing the housing attachment portions 118 a and 118 b on the heat radiation fins 114 located at the outer end of the heat radiation fins 114 extending toward the vehicle rear side. In this case, the heat sink 10 can be installed in a small space in the lamp chamber without being installed outside, and can be installed without reducing the heat radiation effect of the heat radiation fins 114. At this time, in the case where the housing 5 has a space at the rear in accordance with the heat dissipating fins 114 of the heat sink 10 and the housing portion 53 for housing the heat sink 5 is provided, the space between the housing 5 and the heat sink 10 is sufficiently maintained. It can be attached to the housing 5 without reducing the heat radiation performance of the heat sink 10.

  Further, the heat dissipating fins 114 of the heat sink 10 are formed side by side in the vehicle width direction on the back surface side of the mounting surface 110 and have surfaces extending in the vertical direction. It is easy to provide on the surface of Thus, the housing attachment portions 118a and 118b can be provided at suitable positions on the outer side in the vehicle width direction of the heat sink 10 with respect to the shape of the housing 5, and the installation freedom of the lamp unit 1 is improved. Further, as shown in FIGS. 2 and 3, since the housing attachment portion 118a is set in a plane shape of the radiation fin 114, when the housing attachment portions 118a and 118b are provided at two positions in the upper and lower directions, respectively. It is also easy to provide a reinforcing rib 119 connecting the two.

When the lamp unit 1 is a lamp for side illumination such as a cornering lamp and is installed toward the side of the vehicle, the housing mounting portion 118a inside the vehicle is provided on the side of the mounting surface 110, the housing 5 The mounting portion (for example, the boss 51) is set at a position away from the inner wall of the lamp, and the boss 51 needs to be set long and thick to a position close to the mounting surface 110 of the lamp unit 1. As a result, there is a possibility that defects such as sink marks may occur in the housing 5.
Therefore, as shown in FIG. 5, the housing attachment portion 118 a provided on the inner side in the vehicle width direction of the lamp unit 1 is installed on the tip end side of the radiation fin 114, and the housing attachment portion 118 b provided on the outer side in the vehicle width direction of the lamp unit 1. Are disposed on the mounting surface 110 side of the radiation fin 114. Thus, even if the semiconductor type light source 12 and the mounting surface 110 are mounted with the semiconductor light source 12 and the mounting surface 110 inclined to the side, the vehicle lamps 101L and 101R are mounted. It is easy to attach to the space of the lamp room.

  Next, when the lamp unit 1 is installed in the forward direction of the vehicle, that is, the lamp unit 1 installed so that the semiconductor light source 12 and the mounting surface 110 are orthogonal to the vehicle axis will be described.

When the lamp unit 1 has a shape in which the vehicle headlamps 101R and 101L are slanted and is installed inside the vehicle width direction of the entire vehicle headlamps 101R and 101L, a housing is provided inside the vehicle of the lamp unit 1 The inner walls of 5 are close to each other, and the inner wall of the housing 5 is located at the backward position on the vehicle outside of the lamp unit 1 and is in an open state. Therefore, the housing attachment portion 118a is provided on the mounting surface 110 side of the heat dissipating fin 114 located at the vehicle inner end of the heat sink 10 of the lamp unit 1, and at the tip of the heat dissipating fin 114 located at the vehicle outer end By providing the housing attachment portion 118b, it is easy to attach the vehicle lamp 101R, 101L without significantly projecting into the lamp chamber.

Furthermore, as shown in FIG. 2, in the lamp unit 1, the light source mounting portion 111 and the leg mounting portions 113 a and 113 b are separated by grooves 116 a and 116 b extending in the vertical direction of the vehicle. .
When the semiconductor-type light source 12 emits light, heat is generated, and the heat is transferred from the light source mounting portion 111 to the leg mounting portions 113a and 113b and further to the housing mounting portion 118a, as shown by the arrows in FIG. Heat transfer to 118b.
When the grooves 116a and 116b are provided as in the present embodiment, the heat generated by the semiconductor-type light source 12 is largely transmitted through the bridge portions 115a and 115b, as indicated by the arrows in FIG. 4B. It will be diverted and heat transferred.

And since convection in the vertical direction is also likely to occur in the portions of the grooves 116a and 116b, and the cooling effect is high, heat is dissipated in the process of heat transfer by the large bypass, and the attachment portion 21a of the shade 20, Heat can be suppressed from being transmitted to the mounting structures 33a and 33b of the lens 30 and the housing mounting portions 118a and 118b.
As a result, it is possible to efficiently suppress deformation and thermal deterioration due to heat transmitted to the mounting portions 21a and 21b of the shade 20, the mounting structures 33a and 33b of the lens 30, and the housing mounting portions 118a and 118b.

  In addition, since the grooves 116a and 116b are adjacent to the light source mounting portion 111, the heat of the light source mounting portion 111 can be dissipated efficiently, and the temperature rise of the semiconductor type light source 12 itself can be suppressed through the light source mounting portion 111. It is possible to suppress the decrease in the light emission efficiency caused by the temperature rise of the light source 12.

  Although the present invention has been described above using the embodiment, it goes without saying that the technical scope of the present invention is not limited to the scope described in the above embodiment. It will be apparent to those skilled in the art that various changes or modifications can be added to the above embodiment. It is also apparent from the scope of the claims that the embodiments added with such alterations or improvements can be included in the technical scope of the present invention.

DESCRIPTION OF SYMBOLS 1 lamp unit 10 heat sink 11a, 11b fixing part 12 semiconductor type light source 12a light emitting chip 12b substrate 20 shade 21a, 21b shade attachment part 30 lens (optical member)
31 lens portion 32a, 32b leg portion 33a, 33b mounting structure 40a, 40b screw 110 mounting surface 111 light source mounting portion 112 light source mounting structure 113a, 113b leg mounting portion 114 radiation fin 115a, 115b bridging portion 116a, 116b groove (groove portion )
117a, 117b Reinforcing plate portions 118a, 118b Heat sink attachment portion 119 Reinforcement rib 5 Housing 51 Boss 52 Screw 53 Housing portion

Claims (2)

In a vehicle lamp provided in a lamp chamber comprising an outer lens and a housing,
A light source for emitting light,
An optical member for emitting light from the light source to the front side of the vehicle;
A mounting surface on which the light source and the optical member are mounted;
A heat sink having a plurality of heat dissipating fins extending rearward of the vehicle at the rear of the mounting surface;
The light source is mounted on the light source mounting portion of the mounting surface,
The mounting surface is provided so as to be orthogonal to the light emission optical axis of the light source, and the plurality of heat radiation fins are formed side by side on the back surface side of the mounting surface so as to be separated in the vehicle width direction.
Among the plurality of heat dissipating fins, the heat dissipating fin located at the end of the heat sink is provided with a housing attachment portion for attaching the heat sink to the housing ,
The housing attachment portion is formed on the front end side of the heat dissipating fin inside the vehicle, and is formed on the mounting surface side of the heat dissipating fin outside the vehicle, and the mounting surface is formed by the housing attachment portion. The light source is mounted on the housing in an inclined state with respect to a vehicle axis such that an emission optical axis of the light source mounted on the mounting surface is directed to the side of the vehicle.
A vehicle lamp characterized in that. A leg mounting portion to which the optical member is attached is provided at a portion outside the light source mounting portion of the mounting surface of the heat sink,
The vehicular lamp according to claim 1, wherein the plurality of grooves recessed into the radiating fin side is formed, it is characterized between said legs mounting portion and the light source mounting portion.