JP2012204168A - Vehicular headlight - Google Patents

Abstract

A small and low-cost vehicle headlamp is provided.
A lamp unit 11 of a vehicle headlamp 10 is surrounded by a heat sink 12 and an outer lens 13, and includes a lamp chamber S in which light source units 14 and 15 and a light source mounting portion 12b are accommodated, and an interior of the lamp chamber S. 12d of a waterproof structure formed through the heat sink 12 and having a waterproof cap 12f attached thereto, a wiring insertion hole 12e formed through the heat sink 12 in the lamp chamber S, and a wiring insertion hole 12e. The connecting portion 12g to 12i of the wiring cable 18 connected to the light source units 14 and 15 and the optical axis adjusting frame 20 attached and fixed to the heat sink 12 outside the lamp chamber S is provided.
[Selection] Figure 1

Description

  The present invention relates to a vehicle headlamp.

In a lamp using a light emitting element such as an LED, a temperature rise must be suppressed in order to extend the life of the light emitting element, and it is necessary to provide a heat sink.
In addition, the vehicle headlamps (head lamps and fog lamps) are required by law to enable optical axis adjustment, and it is necessary to provide an optical axis adjustment mechanism.
In a conventional vehicle headlamp (vehicle lamp), an optical axis adjustment mechanism is connected to a heat sink (heat radiating member) attached and fixed to a light source unit (lamp unit) on which a light emitting element is mounted, and these (light source unit, A heat sink and an optical axis adjusting mechanism) are disposed in a sealed waterproof lamp chamber formed by a lamp housing and an outer lens (see Patent Document 1).

JP 2010-165536 A (see paragraph [0020])

In the conventional vehicle headlamp, the light source unit and the heat sink are integrally tilted in the lamp chamber by the optical axis adjustment mechanism. Therefore, in order to prevent the light source unit and the heat sink from interfering with the lamp housing and the outer lens, There was a problem of increasing the size.
When the lamp chamber formed by the lamp housing and the outer lens is enlarged, there is a problem that the cost of parts of the vehicle headlamp increases.
The present invention has been made to solve the above problems, and an object of the present invention is to provide a small and low-cost vehicle headlamp.

  As a result of intensive studies in order to solve the above-mentioned problems, the present inventors have arrived at each aspect of the present invention as follows.

<First aspect>
The first aspect is
A light source unit equipped with a light emitting element;
A heat sink having a light source mounting portion to which the light source unit is mounted and fixed;
An outer lens fixed to the heat sink;
A lamp chamber surrounded by the heat sink and the outer lens, in which the light source unit and the light source mounting portion are accommodated;
A breathing hole with a waterproof structure formed through the heat sink inside the lamp chamber;
A wiring insertion hole formed through the heat sink inside the lamp chamber;
A wiring cable inserted from the outside into the wiring insertion hole and connected to the light source unit;
It is a vehicle headlamp provided with a lamp unit including a connecting portion with an optical axis adjusting mechanism attached and fixed to the heat sink outside the lamp chamber.

According to the first aspect, the lamp chamber of the lamp unit can have a sealed waterproof structure, and an optical axis adjusting mechanism for tilting the lamp unit is provided outside the lamp unit. Can be omitted.
Since the optical axis adjustment mechanism is not provided inside the lamp chamber, the lamp chamber can be reduced in size, and the parts cost of the vehicle headlamp can be reduced. A lighting can be realized.

<Second aspect>
In a first aspect, a second aspect includes an optical axis adjustment mechanism that is coupled to the coupling portion and tilts the lamp unit to perform optical axis adjustment.
Therefore, it becomes possible to attach a design component to the optical axis adjustment mechanism, and the design of the vehicle headlamp can be improved.
Further, if the optical axis adjustment mechanism is formed integrally with a part of the vehicle body, a part of the vehicle body can be shared with the optical axis adjustment mechanism, and further cost reduction of the vehicle headlamp can be realized.

<Third aspect>
According to a third aspect, in the second aspect, the optical axis adjustment mechanism includes a frame body that surrounds and exposes the heat sink.
Therefore, the heat dissipation performance of the heat sink is not hindered by the optical axis adjustment mechanism, and the heat dissipation performance of the heat sink can be increased. Therefore, the temperature rise of the light emitting element can be suppressed and the life can be extended.
In addition, since the lamp unit and the optical axis adjustment mechanism are arranged in an overlapping state, the depth of the vehicle headlamp can be reduced, and the vehicle headlamp can be further reduced in size. it can.

<Fourth aspect>
According to a fourth aspect, in the first to third aspects, an electronic circuit for turning on the light emitting element is formed, and the circuit board is provided inside the lamp chamber and attached to the heat sink.
For this reason, if the heat sink is formed of a conductive material, the heat sink functions as an electromagnetic shield plate, so that the heat sink can shield electromagnetic waves emitted from the back side of the circuit board.
Here, the vehicle headlamp is attached to the front portion of the vehicle, and the electronic device of the vehicle is provided on the back side of the vehicle headlamp. Therefore, if the electromagnetic wave emitted from the back side of the circuit board can be shielded Since the electronic device of the vehicle is hardly affected by the electromagnetic wave, the electromagnetic wave can be prevented from adversely affecting the electronic device of the vehicle.

<5th aspect>
A fifth aspect includes, in the first to fourth aspects, a mounting groove formed in an annular shape along the outer peripheral edge of the heat sink, and the peripheral edge of the outer lens is fitted and fixed to the mounting groove.
For this reason, the connection portion between the heat sink and the outer lens can be completely sealed, and the waterproofness of the lamp unit can be improved.

<Sixth aspect>
A sixth aspect includes, in the first to fifth aspects, a plurality of heat radiation fins protruding from the heat sink outside the lamp chamber, and the breathing hole and the wiring insertion hole are between the heat radiation fins. Formed.
Therefore, the breathing hole and the wiring insertion hole do not restrict the configuration of the heat sink, and the breathing hole and the wiring insertion hole can be formed at an optimum location.

<Seventh aspect>
In a seventh aspect, in the first to sixth aspects, the light source unit includes a reflector that reflects light emitted from the light emitting element.
Therefore, the front side of the vehicle headlamp can be efficiently irradiated without wasting light of the light emitting element.

<Eighth aspect>
An eighth aspect includes the light source unit for low beam and the light source unit for high beam in the first to seventh aspects.
Therefore, the low beam light source unit and the high beam light source unit can be provided in one vehicle headlamp.

FIG. 1A is a top view of a vehicle headlamp 10 according to a first embodiment that embodies the present invention. FIG. 1B is a front view of the vehicle headlamp 10. FIG. 1C is a right side view of the vehicle headlamp 10. FIG. 2 is a top view of a lamp unit 11 constituting the vehicle headlamp 10. The front view of the lamp unit 11. FIG. The right view of the lamp unit 11. FIG. The rear view of the lamp unit 11. FIG. It is principal part sectional drawing of the lamp unit 11, and the alpha-alpha arrow sectional view in FIG. It is principal part sectional drawing of the lamp unit 11, and is a beta-beta arrow sectional view in FIG. FIG. 8A is a top view of the optical axis adjusting frame 20 constituting the vehicle headlamp 10. FIG. 8B is a front view of the optical axis adjusting frame 20. FIG. 8C is a right side view of the optical axis adjusting frame 20. FIG. 9A is a top view of a vehicle headlamp 50 according to a second embodiment that embodies the present invention. FIG. 9B is a front view of the vehicle headlamp 50. FIG. 9C is a right side view of the vehicle headlamp 50. The top view of the lamp unit 51 which comprises the vehicle headlamp 50. FIG. The front view of the lamp unit 51. FIG. The right view of the lamp unit 51. FIG.

  Hereinafter, embodiments embodying the present invention will be described with reference to the drawings. In each embodiment, the same constituent members and constituent elements are denoted by the same reference numerals, and redundant description of the same content is omitted.

<First Embodiment>
A vehicle headlamp 10 according to a first embodiment will be described with reference to FIGS.
The vehicle headlamp 10 includes a lamp unit 11 and an optical axis adjusting frame (aiming base) 20 and is attached to a front portion of a vehicle (not shown).

[Configuration of Lamp Unit 11]
As shown in FIGS. 1 to 7, the lamp unit (lamp body) 11 includes a heat sink 12, an outer lens 13 (projection 13a, adhesive 13b), a lamp chamber S, a light source unit 14 (light emitting element 14a, reflector 14b, lens). A holder 14c, a projection lens 14d), a light source unit 15 (light emitting element 15a, reflector 15b), a circuit case 16, a circuit board 17, a wiring cable 18, and the like.

The heat sink 12 is integrally formed of a material having high thermal conductivity and conductivity (for example, a metal material, a conductive synthetic resin material, etc.), and includes a wall portion 12a, a light source mounting portion 12b, a heat radiation fin portion 12c, and a breathing hole ( 12d, wiring insertion hole 12e, waterproof cap 12f, connecting portions 12g to 12i, mounting groove 12j, and the like.
The wall portion 12a has a rectangular flat plate shape, and a light source mounting portion 12b projects from the front side (front surface side) of the wall portion 12a, and a radiating fin portion 12c projects from the back side (back side) of the wall portion 12a. It is set up. The wall portion 12 a extends in a direction substantially perpendicular to the optical axis direction of the vehicle headlamp 10.

The light source mounting portion 12b has a rectangular flat plate shape and protrudes in a substantially vertical direction with respect to the wall portion 12a.
A light source unit (optical member) 14 is mounted and fixed on the upper side of the light source mounting portion 12b, and a light source unit 15 is mounted and fixed on the lower side of the light source mounting portion 12b.
The radiating fin portion 12 c is composed of a plurality of rectangular flat plate-like fins (9 in the illustrated example) extending in the vertical direction of the lamp unit 11, and the fins are spaced apart in the lateral direction of the lamp unit 11. It is arranged in the space.

The breathing hole 12d and the wiring insertion hole 12e are circular through holes formed so as to penetrate between the fins constituting the heat radiating fin part 12c so as to connect the front side and the back side of the wall part 12a.
One breathing hole 12d is provided in each of the upper left portion and the lower right portion of the wall portion 12a.
The waterproof cap 12f is attached to the opening on the back side of the wall 12a in the breathing hole 12d, and from the opening of the breathing hole 12d in a state where air permeability is secured without impeding the passage of air in the breathing hole 12d. Prevents intrusion of water and maintains liquid tightness.

The connecting portions 12g to 12i are rectangular flat plates having the same size and shape, and a ball joint 25 (see FIGS. 1 and 8) of the optical axis adjusting frame 20 is connected to a substantially central portion of the connecting portions 12g to 12i. A rectangular mounting hole is formed through.
The connecting part 12g is in the vicinity of the upper left part of the wall part 12a, the connecting part 12h is in the vicinity of the lower left part of the wall part 12a, and the connecting part 12i is in the vicinity of the lower right part of the wall part 12a in the plane direction of the wall part 12a. Projected.
The mounting groove 12j is formed in a rectangular ring shape near the outer periphery on the front side of the wall portion 12a.

The outer lens 13 has a substantially rectangular parallelepiped box shape, and is formed of a translucent material (for example, a synthetic resin material such as polycarbonate). As shown in FIG. 6, a protrusion 13 a protrudes from the peripheral edge surface of the opening of the outer lens 13. It is installed.
As shown in FIG. 6, the protrusion 13a of the outer lens 13 is fitted into the mounting groove 12j of the heat sink 12, and the protrusion 13a and the mounting groove 12j are bonded and fixed by the adhesive 13b filled in the mounting groove 12j. Thus, the outer lens 13 is attached and fixed to the heat sink 12.

  Therefore, the lamp chamber S surrounded by the heat sink 12 and the outer lens 13 is formed, the light source units 14 and 15 and the light source mounting portion 12b are accommodated in the lamp chamber S, and the breathing hole 12d and the wiring insertion hole 12e are inside the lamp chamber S. The connecting portions 12g to 12i are provided outside the lamp chamber S, and a circuit case 16 and a circuit board 17 described later are provided inside the lamp chamber S.

The light source unit 14 is a projector-type low beam lamp, and includes a light emitting element 14a, a reflector 14b, a lens holder 14c, a projection lens (outer lens) 14d, and the like.
The light emitting element 14a is mounted and fixed on the upper surface side of the light source mounting portion 12b of the heat sink 12, and emits light above the light source mounting portion 12b.
In addition, the light emitting element 14a is comprised from optical semiconductor elements (semiconductor type light source), such as an LED element, an inorganic EL element, and an organic EL element, for example.

The reflector 14b is mounted and fixed on the upper surface side of the light source mounting portion 12b, and a concave reflecting surface (not shown) for reflecting a part of the light emitted from the light emitting element 14a is provided on the inner surface side of the reflector 14b. Yes.
The light emitting element 14a is disposed in the vicinity of the first focal point of the reflector 14b, and the second focal point of the reflector 14b is set at a position substantially coincident with the focal point on the rear side of the projection lens 14d.
The substantially cylindrical lens holder 14c is fitted and fixed to the outer peripheral edge of the projection lens 14d.
The projection lens 14d is attached and fixed to the front end portion of the light source attachment portion 12b of the heat sink 12 via the lens holder 14c.

  In the light source unit 14, when the light emitting element 14a is turned on, a part of the light emitted from the light emitting element 14a is reflected by the reflecting surface of the reflector 14b, and the reflected light and the direct light emitted from the light emitting element 14a are combined. The light is condensed by the projection lens 14 d and irradiated toward the front side of the vehicle headlamp 10 to illuminate the front side of the vehicle headlamp 10.

The light source unit 15 is a projector type high beam lamp, and includes a light emitting element 15a and a reflector 15b.
The light emitting element 15a is mounted and fixed on the lower surface side of the light source mounting portion 12b of the heat sink 12, and emits light below the light source mounting portion 12b.
The light emitting element 15 a has the same configuration as the light emitting element 14 a of the light source unit 15.

The reflector 15b is fixedly attached to the lower surface side of the light source mounting portion 12b, and a reflective surface curved in a concave shape is provided on the upper surface of the reflector 15b.
In the light source unit 15, when the light emitting element 15 a is turned on, the light emitted from the light emitting element 15 a is reflected by the reflecting surface of the reflector 15 b and irradiated toward the front side of the vehicle headlamp 10. The front side of the lighting 10 is illuminated.

  The circuit case 16 has a substantially rectangular parallelepiped box shape and is formed of a conductive material (for example, a metal material, a conductive synthetic resin material, or the like). As shown in FIG. The circuit case 16 and the wall 12a are electrically connected to each other.

The circuit board 17 is a printed wiring board on which electronic components (not shown) constituting an electronic circuit for lighting the light emitting elements 14a and 15a mounted on the light source units 14 and 15 are mounted, and a circuit pattern is formed on the circuit board 17 by wiring. Yes, and connected to the light emitting elements 14a and 15a by lead wires (not shown).
As shown in FIG. 7, the circuit board 17 is attached and fixed to the wall portion 12 a of the heat sink 12 in the circuit case 16, and the circuit board 17 is enclosed and accommodated by the circuit case 16 and the wall portion 12 a.
The wiring cable 18 connected to the circuit board 17 is inserted into the wiring insertion hole 12 e of the heat sink 12 and drawn out of the lamp unit 11. Therefore, the wiring cable 18 is indirectly connected to the light emitting elements 14a and 15a of the light source units 14 and 15 via the circuit board 17 and lead wires.

[Configuration of optical axis adjusting frame 20]
As shown in FIGS. 1 and 8, the optical axis adjusting frame 20 includes a frame main body 21 (opening 21a, fool hole 21b), mounting members 22a and 22b, an optical axis adjusting actuator 23, aiming shafts 24a to 24c, It consists of a ball joint 25 and the like.

The frame main body 21 has a rectangular frame shape, and the inner dimension of the opening 21 a of the frame main body 21 is slightly larger than the outer dimension of the wall 12 a of the heat sink 12 of the lamp unit 11.
The attachment members 22a and 22b are rectangular flat plates having the same size and shape, and a circular attachment hole is formed through the substantially central portion of the attachment members 22a and 22b.
The attachment member 22 a is provided in the vicinity of the lower left portion of the frame body 21, and the attachment member 22 a is provided in the vicinity of the upper right portion of the frame body 21 in the planar direction of the frame body 21.
Then, the optical axis adjusting frame 20 is fixed to the front portion of the vehicle by fixing the frame body 21 to the front portion (not shown) of the vehicle with bolts (not shown) inserted through the mounting holes of the mounting members 22a and 22b. It is fixed and attached to.

The optical axis adjusting actuator 23 is fixedly attached to the back side of the lower right portion of the frame main body 21, and the mounting portion between the optical axis adjusting actuator 23 and the frame main body 21 has a waterproof structure.
The aiming shaft 24a is near the upper left part of the frame body 21, the aiming shaft 24b is near the lower left part of the frame body 21, and the aiming shaft 24c is perpendicular to the lower right part of the frame body 21, respectively. Protruding in the direction.

Base end portions on the back side of the aiming shafts 24 a and 24 b are attached and fixed to the frame main body 21.
The aiming shaft 24 c is rotatably inserted into a fool hole 21 b formed through the frame main body 21, and the rear end of the aiming shaft 24 c is attached to the optical axis adjusting actuator 23.
A ball joint 25 is attached to the tip of the aiming shafts 24a to 24c.

  As shown in FIG. 1, in order to assemble the vehicle headlamp 10, the radiating fin portion 12 c of the heat sink 12 of the lamp unit 11 is inserted into the opening 21 a of the frame body 21 from the front side of the optical axis adjustment frame 20. By connecting the ball joints 25 of the aiming shafts 24 a to 24 c from the back side of the connecting portions 12 g to 12 i of the heat sink 12, the lamp unit 11 is attached to the optical axis adjusting frame 20 so as not to drop off.

  When the aiming shaft 24 c is expanded and contracted by the optical axis adjusting actuator 23, the lamp unit 11 is cooperated by the aiming shafts 24 a to 24 c and the ball joint 25 and the connecting portions 12 g to 12 i of the heat sink 12 of the lamp unit 11. Is tilted in the vertical direction or in the horizontal direction, the optical axis of the vehicle headlamp 10 is adjusted.

[Operations and effects of the first embodiment]
According to the vehicle headlamp 10 of the first embodiment, the following actions and effects can be obtained.

  [1] The lamp unit 11 of the vehicle headlamp 10 is surrounded by a heat sink 12 and an outer lens 13, and includes a lamp chamber S in which the light source units 14 and 15 and the light source mounting portion 12 b are accommodated, and the interior of the lamp chamber S. A waterproof structure breathing hole 12d formed through the heat sink 12 and covered with a waterproof cap 12f, a wiring insertion hole 12e formed through the heat sink 12 in the lamp chamber S, and a wiring insertion hole 12e. Connecting portions 12g to 12i of the wiring cable 18 connected to the light source units 14 and 15 and the optical axis adjusting frame 20 (optical axis adjusting mechanism) attached and fixed to the heat sink 12 outside the lamp chamber S. .

Therefore, the lamp chamber S of the lamp unit 11 can be sealed and waterproof, and an optical axis adjusting frame 20 for tilting the lamp unit 11 is provided outside the lamp unit 11, so that a conventional lamp housing is provided. Can be omitted.
Since the optical axis adjusting frame 20 is not inside the lamp chamber S, the lamp chamber S can be reduced in size, and the component cost of the vehicle headlamp 10 can be reduced. An inexpensive vehicle headlamp 10 can be realized.

[2] The aiming shafts 24 a to 24 c of the optical axis adjusting frame 20 are connected to the connecting portions 12 g to 12 i of the lamp unit 11 via the ball joint 25, and the optical axis adjusting frame 20 is external to the lamp unit 11. Is installed.
Therefore, it is possible to attach a design component to the optical axis adjusting frame 20 and improve the design of the vehicular headlamp 10.
Further, if the frame main body 21 of the optical axis adjusting frame 20 is formed integrally with a part of the vehicle body, a part of the vehicle body can be shared with the frame main body 21 and the vehicle headlamp 10 can be further reduced. Cost reduction can be realized.

  [3] The heat sink 12 of the lamp unit 11 is inserted into the opening 21 a of the frame main body 21 of the optical axis adjusting frame 20, and the frame main body 21 surrounds the heat sink 12 and is exposed.

Therefore, the heat dissipation property of the heat sink 12 is not hindered by the optical axis adjusting frame 20, and the heat dissipation property of the heat sink 12 can be enhanced. Therefore, the temperature rise of the light emitting elements 14a and 15a is suppressed and the life is extended. be able to.
Further, as shown in FIGS. 1A and 1C, the lamp unit 11 and the optical axis adjustment frame 20 are arranged so as to overlap each other, so that the depth dimension D of the vehicle headlamp 10 is reduced. Therefore, further downsizing of the vehicle headlamp 10 can be realized.

[4] The circuit board 17 on which an electronic circuit for lighting the light emitting elements 14a and 15a is formed is fixedly attached to the wall portion 12a of the heat sink 12 in the circuit case 16, and the circuit board 17 is connected to the circuit case 16 and the wall. It is enclosed by the part 12a.
The heat sink 12 and the circuit case 16 are formed of a conductive material, and the heat sink 12 and the circuit case 16 are electrically connected.
For this reason, the heat sink 12 and the circuit case 16 can provide electromagnetic shielding to the circuit board 17, and the electromagnetic waves generated by the circuit board 17 can be prevented from adversely affecting the electronic equipment of the vehicle.

When the circuit case 16 is omitted, since the heat sink 12 functions as an electromagnetic shield plate, the heat sink 12 can shield electromagnetic waves emitted from the back side of the circuit board 17.
The vehicle headlamp 10 is attached to the front part of the vehicle, and the electronic equipment of the vehicle is provided on the back side of the vehicle headlamp 10, so that the electromagnetic wave emitted from the back side of the circuit board 17 can be shielded. Since the electronic device of the vehicle is hardly affected by the electromagnetic wave, the same effect can be obtained even if the circuit case 16 is omitted.

[5] A mounting groove 12j is formed in a rectangular ring shape in the vicinity of the outer periphery on the front side of the wall 12a of the heat sink 12, and a protrusion 13a protruding from the peripheral edge surface of the opening of the outer lens 13 is mounted on the mounting groove 12j. The outer lens 13 is attached and fixed to the heat sink 12 by the protrusion 13a and the attachment groove 12j being bonded and fixed by the adhesive 13b filled in the attachment groove 12j.
Therefore, the connection portion between the heat sink 12 and the outer lens 13 can be completely sealed, and the waterproofness of the lamp unit 11 can be improved.

[6] The heat radiating fin portion 12c composed of a plurality of heat radiating fins protrudes from the back side of the heat sink 12 that is outside the lamp chamber S. The breathing hole 12d and the wiring insertion hole 12e are formed between the radiation fins of the radiation fin portion 12c.
For this reason, the breathing hole 12d and the wiring insertion hole 12e do not restrict the configuration of the heat sink 12, and the breathing hole 12d and the wiring insertion hole 12e can be formed at optimum positions.

Here, the breathing hole 12d vents the inside and outside of the lamp chamber S to release heat trapped inside, and generates an efficient air flow inside the lamp chamber S. In order to achieve this, one is provided at each of the upper left portion and the lower right portion of the wall portion 12a of the heat sink 12.
In addition, it is more effective if three or more breathing holes 12d are provided. In that case, the breathing holes 12d may be provided in a place taking into consideration the air flow inside the lamp chamber S.

  [7] Since the light source units 14 and 15 include the reflectors 14b and 15b that reflect the light emitted from the light emitting elements 14a and 15a, respectively, the vehicle headlamp without wasting light of the light emitting elements 14a and 15a. The front side of 10 can be efficiently irradiated.

  [8] The low-beam light source unit 14 and the high-beam light source unit 15 can be provided in one vehicle headlamp 10.

Second Embodiment
As shown in FIGS. 9 to 12, the vehicle headlamp 50 according to the second embodiment includes a lamp unit 51 and an optical axis adjusting frame 20.
The second embodiment is different from the first embodiment only in that the lamp unit 51 includes two light source units 14 arranged in the horizontal direction.
In order to distinguish the two light source units 14, “L” and “R” are added to the end of the reference numerals for illustration.
The light source unit 14L is for a high beam, and the light source unit 14R is for a low beam.
Also in the second embodiment, the same operations and effects as in the first embodiment can be obtained.

  The present invention is not limited to the description of each aspect and the embodiment. Various modifications are also included in the present invention as long as those skilled in the art can easily conceive without departing from the scope of the claims. The contents of papers, published patent gazettes, patent gazettes, etc. specified in this specification are incorporated by reference in their entirety.

DESCRIPTION OF SYMBOLS 10,50 ... Vehicle headlamp 11,51 ... Lamp unit 11
20 ... Optical axis adjustment frame (optical axis adjustment mechanism)
DESCRIPTION OF SYMBOLS 12 ... Heat sink 13 ... Outer lens 13a ... Projection 13b of outer lens 13 ... Adhesives 14, 14L, 14R ... Light source units 14a, 15a ... Light emitting elements 14b, 15b ... Reflector 16 ... Circuit case 17 ... Circuit board 18 ... Wiring cable 12a ... Wall portion 12b of heat sink 12 ... Light source mounting portion 12b of heat sink 12
12c ... Radiating fin portion 12d of heat sink 12 ... Breathing hole 12e ... Wiring insertion hole 12f ... Waterproof cap 12g-12i ... Connecting portion 12j of heat sink 12 ... Mounting groove S of heat sink 12 ... Lamp chamber

Claims (8)

A light source unit equipped with a light emitting element;
A heat sink having a light source mounting portion to which the light source unit is mounted and fixed;
An outer lens fixed to the heat sink;
A lamp chamber surrounded by the heat sink and the outer lens, in which the light source unit and the light source mounting portion are accommodated;
A breathing hole with a waterproof structure formed through the heat sink inside the lamp chamber;
A wiring insertion hole formed through the heat sink inside the lamp chamber;
A wiring cable inserted from the outside into the wiring insertion hole and connected to the light source unit;
A vehicle headlamp provided with a lamp unit including a connecting portion with an optical axis adjusting mechanism fixed to the heat sink outside the lamp chamber. The vehicle headlamp according to claim 1,
A vehicle headlamp including an optical axis adjusting mechanism that is connected to the connecting portion and adjusts an optical axis by tilting the lamp unit. In the vehicle headlamp according to claim 2,
The optical axis adjusting mechanism is a vehicle headlamp including a frame body that surrounds and exposes the heat sink. In the vehicle headlamp according to any one of claims 1 to 3,
An automotive headlamp comprising an electronic circuit for turning on the light emitting element, and a circuit board attached to the heat sink inside the lamp chamber. In the vehicle headlamp according to any one of claims 1 to 4,
A mounting groove formed in an annular shape along the outer peripheral edge of the heat sink,
A vehicle headlamp in which a peripheral edge of the outer lens is fitted and fixed in the mounting groove. In the vehicle headlamp according to any one of claims 1 to 5,
A plurality of radiation fins protruding from the heat sink outside the lamp chamber,
The breathing hole and the wiring insertion hole are vehicle headlamps formed between the radiating fins. The vehicle headlamp according to any one of claims 1 to 6,
The said light source unit is a vehicle headlamp provided with the reflector which reflects the light discharge | released from the said light emitting element. In the vehicle headlamp according to any one of claims 1 to 7,
A vehicle headlamp comprising the light source unit for low beam and the light source unit for high beam.

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