JP2012064516A - Vehicle headlight - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle headlight, capable of facilitating design development and achieving designated performance, and capable of reducing burden on cost while accomplishing a development cycle for a short period.SOLUTION: In a fog lamp 1 for storing an illumination optical system 40 in a lamp chamber inside a lamp body 10, the lamp body 10 has a transparent cover 20 having a cylindrical shape extending in a predetermined direction and covering an opening 11 at one end side of the lamp body 10, and a rear cover 30 covering an opening 12 at the other end side of the lamp body 10 and supporting the illumination optical system 40.

Description

  The present invention relates to a vehicle headlamp.

  The vehicle headlamp is configured to project light onto a predetermined illumination area in front of the vehicle from the viewpoint of traveling safety. This illumination area is determined according to vehicle specifications and predetermined laws and regulations, and the illumination optical system of the vehicle headlamp is optically designed so that light can be projected onto the determined illumination area. The following patent document discloses a vehicle headlamp including a light source, a lens, a reflector, and the like as an illumination optical system in a lamp chamber formed by a lamp body and a cover.

JP 2007-207528 A JP 2010-108637 A

By the way, in the design development of the conventional vehicle headlamp, particularly the lamp body, there is a problem that it takes much time and cost. Specifically, the lamp body must be provided with a support portion (shelf, bracket, etc.) at a predetermined position for adjusting the focal position of the light source, lens, and reflector based on the optical design. Further, as described in the above-mentioned patent document, the lamp body is made of aluminum die cast, and has a great deal of time and expense for adjustment of mold design corresponding to the shape, manufacturing equipment plan, and the like.
In addition, based on the heat dissipation design, the lamp body must be thermally managed by dividing the heat from the light source into conduction, radiation, and convection, and if necessary, heat dissipation fins must be provided. Furthermore, the lamp body needs to be designed in consideration of mechanical strength, rigidity, and the like, and is required to be small in size, light in weight, low in cost, and the like.

  The present invention has been made in view of the above problems, and provides a vehicular headlamp that can be easily designed and developed, can achieve a predetermined performance, can be developed in a short period of time, and can be reduced in cost. For the purpose.

In order to solve the above problems, the present invention provides a vehicular headlamp that houses an illumination optical system in a lamp chamber inside a lamp body, the lamp body having a cylindrical shape extending in a predetermined direction. A configuration is adopted in which a transparent cover that covers the one end side opening of the lamp body and a rear cover that covers the other end side opening of the lamp body and supports the illumination optical system are employed.
By adopting such a configuration, in the present invention, the shape of the lamp body is changed to a cylindrical shape, and the support portion that conventionally supports the illumination optical system is eliminated. The illumination optical system is supported by the rear cover. Thereby, since the shape of the lamp body can be simplified, it is possible to reduce a great amount of time and cost required for mold design corresponding to the shape, adjustment of manufacturing equipment plan, and the like.

In the present invention, the lamp body is formed of an extruded material.
By adopting such a configuration, in the present invention, the shape of the lamp body is simplified, and the lamp body can be mass-produced by cutting the cylindrical extruded material into a predetermined length. For this reason, it is advantageous in terms of production speed, cost, etc., as compared with a lamp body having a conventional aluminum casting structure.

Moreover, in this invention, the structure that the radiation fin is integrally formed in the said lamp body is employ | adopted.
By adopting such a configuration, in the present invention, since the heat dissipating fins are integrated with the lamp body, the cost can be reduced.

In the present invention, a configuration is adopted in which the lamp body is attached to an external housing, and an attachment portion for attaching the lamp body to the external housing is integrally formed.
By adopting such a configuration, in the present invention, since the mounting portion is integrated with the lamp body, it is possible to contribute to the cost reduction.

Further, the present invention employs a configuration in which the lamp body and the cover are fitted, and a fitting portion with the cover is integrally formed on the lamp body.
By adopting such a configuration, in the present invention, since the fitting portion is integrated with the lamp body, it is possible to contribute to cost reduction.

In the present invention, the lamp body employs a configuration in which black alumite treatment is performed.
By adopting such a configuration, in the present invention, the effect of heat radiation due to radiation can be enhanced by black anodizing the lamp body and making the surface black.

In the present invention, the rear cover employs a configuration in which at least part of heat generated from the illumination optical system is formed of a heat conductive material that transfers heat to the lamp body.
By adopting such a configuration, in the present invention, the rear cover that supports the illumination optical system is formed from a heat conductive material, and at least a part of the heat received is transferred to the lamp body having a high heat dissipation effect, The heat dissipation performance can be improved.

In the present invention, the illumination optical system employs a configuration having a semiconductor light emitting element.
By adopting such a configuration, in the present invention, since the light emitted from the semiconductor light emitting element has high directivity, the configuration of the illumination optical system can be simplified and the number of parts can be reduced.

Further, the present invention employs a configuration in which the lamp body is attached to an external housing and has an angle adjusting mechanism for adjusting an attachment angle of the lamp body with respect to the external housing.
By adopting such a configuration, in the present invention, the direction of the light projected from the illumination optical system through the transparent cover can be adjusted by adjusting the angle of the lamp body.

  According to the present invention, it is possible to obtain a vehicular headlamp that can be easily designed and developed, can achieve a predetermined performance, can be developed in a short period, and can reduce the cost burden.

It is a perspective view which shows the passenger car provided with the fog lamp in embodiment of this invention. It is sectional drawing which shows the attachment structure of the fog lamp in embodiment of this invention. It is a perspective view which shows the fog lamp in embodiment of this invention. It is a disassembled perspective view which shows the fog lamp in embodiment of this invention. It is sectional drawing which shows the fog lamp in embodiment of this invention. It is a disassembled sectional view which shows the fog lamp in embodiment of this invention. It is a figure which shows the extrusion molding material in embodiment of this invention. It is a figure which shows the extrusion molding material in another embodiment of this invention. It is a front view which shows the fog lamp in another embodiment of this invention. It is sectional drawing which shows the transparent cover in another one Embodiment of this invention. It is an exploded sectional view showing a fog lamp in another embodiment of the present invention. It is a figure which shows the extrusion molding material in another embodiment of this invention. It is a front view which shows the lamp body in another embodiment of this invention. It is a front view which shows the lamp body in another embodiment of this invention. It is a front view which shows the lamp body in another embodiment of this invention. It is a figure which shows the lamp body in another embodiment of this invention. It is a figure which shows the transparent cover in another one Embodiment of this invention. It is a figure which shows the rear part cover in another one Embodiment of this invention. It is a figure which shows the lamp body in another embodiment of this invention. It is a figure which shows the attachment structure of the lamp body in another embodiment of this invention.

Next, embodiments of the present invention will be described with reference to the drawings. In the following description, a case where the present invention is applied to a fog lamp is illustrated.
FIG. 1 is a perspective view showing a passenger car 100 provided with a fog lamp 1 according to an embodiment of the present invention. FIG. 2 is a cross-sectional view showing an attachment structure of the fog lamp 1 in the embodiment of the present invention.

As shown in FIG. 1, a passenger car 100 according to this embodiment includes a headlamp (traveling headlight, a passing headlight) 101, a fog lamp (front foglight) 1, and the like as a vehicle headlamp. , Is provided. The fog lamp 1 is also referred to as an auxiliary headlamp.
As shown in FIG. 2, the fog lamp 1 is inserted into a recess 103 provided in the front bumper 102, and a bottom portion of the recess 103 and a rear portion of the fog lamp 1 are fastened by a screw member 2 and attached. In addition, the attachment structure of the fog lamp 1 is not limited to this structure, and can be appropriately changed according to the specification of the vehicle.

FIG. 3 is a perspective view showing the fog lamp 1 according to the embodiment of the present invention. FIG. 4 is an exploded perspective view showing the fog lamp 1 in the embodiment of the present invention. FIG. 5 is a cross-sectional view showing the fog lamp 1 according to the embodiment of the present invention. FIG. 6 is an exploded cross-sectional view showing the fog lamp 1 in the embodiment of the present invention.
As shown in the figure, the fog lamp 1 has a configuration in which an illumination optical system 40 is accommodated in a lamp chamber formed by a lamp body 10, a transparent cover 20 and a rear cover 30.

  The transparent cover 20 is attached so as to cover the one end side opening 11 of the lamp body 10. The transparent cover 20 has a fitting portion 21 that fits along the inner surface of the one end opening 11. The transparent cover 20 is bonded to the lamp body 10 and is configured to prevent entry of foreign matter (water, dust, mud, etc.) into the lamp chamber. The transparent cover 20 is formed of a glass material, a resin material, or the like, and has a configuration that allows light to be projected forward of the vehicle.

  The rear cover 30 is attached so as to cover the other end side opening 12 of the lamp body 10. The rear cover 30 has a fitting portion 31 that fits along the inner surface of the other end side opening 12. The rear cover 30 is fixed to the lamp body 10 by adhesion, caulking, or a screw member (not shown). The rear cover 30 is configured to support the illumination optical system 40. Further, the rear cover 30 functions as a heat sink that releases the heat generated from the illumination optical system 40 to the outside of the lamp chamber.

  The rear cover 30 is formed of a heat conductive material that transfers at least part of the heat generated from the illumination optical system 40 to the lamp body 10. The rear cover 30 of the present embodiment is made of an aluminum material that has been black anodized to improve heat dissipation characteristics. In addition, in order to improve heat dissipation performance, the structure which coats black instead of a black alumite process may be sufficient. The rear cover 30 has a vent hole 32 (see FIG. 4) for preventing the lamp chamber from being completely sealed.

In addition, in either one of the lamp body 10 and the rear cover 30, a not-shown cable harness including a power cable and the like that is electrically connected to the illumination optical system 40 is introduced into the lamp chamber. Is formed.
The illumination optical system 40 includes an LED module 43 having an LED (semiconductor light emitting element) 41 and a substrate 42, and a light beam guide tube 44. A cable harness (not shown) is configured to be electrically connected to the LED 41 via the substrate 42. The LED module 43 is fixed to the rear cover 30 by a screw member 33 with heat radiation grease (silicone grease in this embodiment) interposed therebetween. Further, as shown in FIG. 5, the optical axis Ax of the LED 41 is set toward the transparent cover 20. As shown in FIG. 4, the LED 41 of the present embodiment includes a light emitting unit 41 a in which four rectangular light emitting areas that emit light are arranged in series in the left-right direction (horizontal direction, vehicle width direction). The optical axis Ax means a central optical axis when the light emitting unit 41a is regarded as one light source.

  The light beam guide tube 44 is provided between the LED 41 and the transparent cover 20 and has a configuration that surrounds the optical axis Ax and defines the illumination area of the fog lamp 1. Specifically, the light beam guide tube 44 is configured to define the illumination area of the fog lamp 1 so as to satisfy predetermined laws and regulations (security standards, ECE rules, etc.).

  The light beam guide tube 44 has a light inlet 45 provided on the side where the LED 41 is disposed and a light outlet 46 provided on the side where the transparent cover 20 is disposed. At least a part of the light entrance 45 and at least a part of the light exit 46 are arranged so as to overlap in the direction in which the optical axis Ax extends. According to this configuration, since the light emitted from the LED 41 has high directivity, direct light with a large amount of light is guided to the transparent cover 20 and is projected onto a predetermined illumination area.

Further, the light beam guide tube 44 has a shape in which the opening area gradually increases from the light entrance 45 toward the light exit 46 based on the directivity characteristics of the LED 41 (see FIGS. 4 to 6). In the present embodiment, the light beam guide tube 44 has a shape that gradually increases in directions other than the upper direction so as to satisfy predetermined regulations (so as to eliminate glare with respect to the oncoming vehicle).
Specifically, the light beam guide tube 44 is designed to have a shape that increases in both directions within an angle range of ± 40 degrees with respect to the optical axis Ax in the left-right direction (vehicle width direction). In the vehicle height direction), it is preferably designed to have a shape that becomes larger within the range of 0 to 40 degrees below the optical axis Ax (horizontal plane).

  The light entrance 45 is disposed so as to surround the light emitting portion 41a (see FIG. 4) of the LED 41. In the light emitting unit 41a of the present embodiment, four rectangular light emitting areas that emit surface light are arranged in series in the left-right direction (horizontal direction, vehicle width direction). For this reason, the light entrance 45 has a substantially rectangular shape. On the other hand, the light outlet 46 has a substantially trapezoidal shape. Light is narrowed down by this trapezoidal shape, and the illumination area of the fog lamp 1 is determined.

  The light beam guide tube 44 has a position adjusting mechanism 50 that adjusts the position of the light outlet 46 (see FIGS. 4 to 6). The position adjustment mechanism 50 of the present embodiment is configured to adjust the position of the light outlet 46 in the vertical direction. A metal leaf spring 51 that can be elastically deformed is provided at a lower portion of the light beam guide tube 44. The leaf spring 51 is fixed to the rear cover 30 by a screw member 52. The screw member 52 is configured to secure the level of the light beam guide tube 44 by fixing the leaf springs 51 in pairs with a gap in the left-right direction.

  On the other hand, an upper portion of the light beam guide tube 44 is provided with a female screw portion 54 that advances and retreats in the axial direction by the rotation of the screw member 53 for position adjustment. The screw member 53 is rotatably supported by the through hole 34 that penetrates the rear cover 30. The screw member 53 is provided with a flange portion (not shown) for preventing the screw member 53 on the opposite side between the head portion and the rear cover 30. According to the above configuration, the female screw portion 54 advances and retreats in the axial direction of the screw member 53 by rotating the screw member 53 around the axis in an arbitrary direction from the outside of the lamp chamber. Then, according to the position of the female screw portion 54, the light beam guide tube 44 tilts in the vertical direction with the fixed position of the leaf spring 51 as a fulcrum. Thereby, the position of the light outlet 46 can be adjusted. In the figure, the light beam guide tube 44 and the LED module 43 are arranged so as to contact each other, but in reality, a minute gap for position adjustment is formed between them.

  The light beam guide tube 44 is made of, for example, an aluminum material. A light reflecting surface 47 is provided on the inner surface side of the light beam guide tube 44. The light reflecting surface 47 in the present embodiment is formed by plating. The light reflecting surface 47 may be formed by vapor deposition or may be formed by applying a light reflecting coating agent. As the light reflection coating agent, for example, a light reflection coating agent (manufactured by Okitsumo Co., Ltd.) having a high reflection filler in silicon resin and having excellent light diffusing ability and a reflectance of 98% and a film thickness of about 100 μm is preferably used. Can do.

  The lamp body 10 has a cylindrical shape extending in a predetermined direction. In the present embodiment, since all the components of the illumination optical system 40 described above are configured to be supported by the rear cover 30, no protrusions (shelves, brackets) or the like are provided inside the lamp body 10. . For this reason, the shape of the lamp body 10 is simplified to a round pipe shape. Moreover, the lamp body 10 of this embodiment is formed from an extrusion molding material.

FIG. 7 is a view showing an extruded material 60 in the embodiment of the present invention.
The extruded material 60 has a round pipe shape. The extruded material 60 of this embodiment is formed by extruding an aluminum material. The lamp body 10 can be mass-produced by cutting the extrusion molding material 60 every predetermined length. A two-dot chain line in FIG. 7 indicates a cut-out line for cutting out the lamp body 10.

  The lamp body 10 also functions as a heat sink that releases heat generated from the illumination optical system 40 to the outside of the lamp chamber. The lamp body 10 of the present embodiment is made of an aluminum material that has been subjected to black alumite treatment in order to improve heat dissipation performance. In order to enhance the heat dissipation effect when the extruded material 60 is formed of an aluminum material as in the present embodiment, the black alumite treatment is cost effective.

  As is well known, the black alumite treatment is a treatment in which an aluminum material immersed in a liquid is electrolytically oxidized at the anode and dyed with a predetermined black dye. The black alumite treatment may be performed after the lamp body 10 is cut out from the extruded material 60 having a round pipe shape, or may be performed before cutting out. In addition, it is preferable in terms of cost that the extrusion molding material 60 is black anodized before cutting out the lamp body 10.

  Next, the operation of the fog lamp 1 having the above configuration will be described.

  When electricity is supplied to the LED 41, the light emitting portion 41a emits light. Since the light emitted from the LED 41 has high directivity, almost all of the light is introduced into the light beam guide tube 44 via the light entrance 45 without going around to the back surface side. The light introduced into the light beam guide tube 44 is narrowed down by the opening shape of the light outlet 46 and led out from the light outlet 46. Then, the light derived from the light outlet 46 is projected onto a predetermined illumination area in front of the vehicle via the transparent cover 20.

  When the LED 41 emits light, the LED module 43 including the LED 41 generates heat. The heat of the LED module 43 is transferred to the rear cover 30 that supports the LED module 43 and is radiated to the outside. Further, a part of the heat received by the rear cover 30 is transferred from the contact portion with the lamp body 10 to the lamp body 10 having a larger surface area (heat dissipating area) and is radiated to the outside. For this reason, it can prevent that the luminous efficiency of LED41 falls by a temperature rise. Further, since the lamp body 10 is subjected to black alumite treatment, the heat dissipation effect by radiation can be promoted.

  In the present embodiment, the illumination optical system 40 uses the LED 41 that can project light with high directivity as a light source. For this reason, in the present embodiment, the illumination optical system 40 is configured not to include a lens or the like instead of providing the light beam guide tube 44, thereby simplifying the configuration of the illumination optical system 40, realizing a reduction in the number of parts, and illumination optics. The configuration can be such that all the components of the system 40 are supported by the rear cover 30. According to this configuration, the shape of the lamp body 10 can be simplified while placing no burden on the shape and design of the rear cover 30.

  When the shape of the lamp body 10 is simplified, the shape of the lamp body 10 can be changed to a shape in which a support portion that has supported the illumination optical system 40 as in the related art is eliminated. If it does so, the influence on the design development of the lamp body 10 by the change of an optical design will be reduced. Further, if the shape of the lamp body 10 is simplified, it can be mass-produced by cutting out from the extruded material 60 as shown in FIG. 7 without using conventional aluminum casting, so that the lamp can be manufactured easily and at low cost. The body 10 can be formed. Further, when the shape of the lamp body 10 is simplified, the weight can be relatively reduced. In addition, when the shape of the lamp body 10 is simplified, radiation design, and design related to strength and rigidity are facilitated. Specifically, in the present embodiment, the heat dissipation design of the lamp body 10 can be easily adjusted by the outer diameter (surface area) and thickness of the pipe material. Further, the mechanical strength, rigidity and the like of the lamp body 10 can be easily adjusted by adjusting the diameter and thickness of the pipe material.

  Therefore, according to the above-described embodiment, the fog lamp 1 can be obtained that can be easily designed and developed, can achieve a predetermined performance, can be developed in a short period, and can reduce the cost burden.

  As mentioned above, although preferred embodiment of this invention was described referring drawings, this invention is not limited to the said embodiment. Various shapes, combinations, and the like of the constituent members shown in the above-described embodiments are examples, and various modifications can be made based on design requirements and the like without departing from the gist of the present invention.

For example, in the above-described embodiment, the lamp body 10 has been described as being mass-produced by cutting the extruded product 60 having a round pipe shape along an orthogonal plane orthogonal to the axis as shown in FIG. The present invention is not limited to this configuration.
For example, as shown in FIG. 8, the extruded material 60 extruded into a round pipe shape is cut obliquely along an inclined surface that intersects the axis of the shaft at a predetermined angle (more specifically, an inclination that intersects the axis of the shaft). The slant-type lamp body 10 can be mass-produced by alternately performing a cut along the plane and a cut along the orthogonal plane orthogonal to the axis. In this way, the shape of the lamp body 10 can be easily changed by adjusting the cutting angle.

For example, in the said embodiment, although the transparent cover 20 demonstrated the structure which is circular shape by a front view, this invention is not limited to this structure. Since the transparent cover 20 is merely water / dust remover, the appearance shown below can be easily improved and differentiated by adopting the following configuration.
For example, as shown in FIG. 9A, the shape of the transparent cover 20 may be larger than that of the lamp body 10 and may be elliptical when viewed from the front. Further, as shown in FIG. 9B, the shape of the lamp body 10 may be elliptical when viewed from the front, in accordance with the transparent cover 20 that is elliptical when viewed from the front. In this case, the elliptical lamp body 10 can be easily mass-produced by cutting the extruded material 60 extruded in the shape of an elliptical pipe. Further, in accordance with the slant type lamp body 10 shown in FIG. 8, the shape of the transparent cover 20 may be inclined as shown in FIG. Further, as shown in FIG. 10B, the oblique transparent cover 20 may be larger than the lamp body 10. Moreover, it is good also as a shape which matched the outer diameter of the transparent cover 20 with the outer diameter of the lamp body 10 of a round pipe shape.

Further, for example, by applying a pattern to the inner surface of the lamp body 10, it is possible to easily improve the appearance and to differentiate. A pattern is formed on the inner surface of the lamp body 10 shown in FIG. As shown in FIG. 12, the lamp body 10 can be manufactured by cutting the extruded molding material 60 that has been extruded with an octagonal inner surface of the cylinder, thereby producing an octagonal inner surface of the lamp body 10. . In addition, Fig.12 (a) shows the front view of the extrusion molding material 60, and FIG.12 (b) shows the AA sectional drawing in Fig.12 (a).
Further, the shape of the inner surface of the lamp body 10 is not limited to an octagon, but may be a polygon such as a dodecagon, a hexagon, or a 24, as required.

In the above embodiment, the lamp body 10 is described as having a round pipe shape, but the present invention is not limited to this configuration.
When the amount of heat radiation in the lamp body 10 is insufficient, as shown in FIG. 13, the heat radiation design can be performed by providing various shapes of heat radiation fins 61 on the outer shape. In this case, it is possible to easily mass-produce the lamp body 10 in which the radiation fins 61 are integrally formed by cutting the extruded molding material 60 extruded together with the radiation fins 61. FIG. 13A shows the lamp body 10 in which the radiating fins 61 having simple fins provided radially are integrally formed. Further, when it is desired to increase the heat radiation area and reduce the outer shape, the devices shown in FIGS. 13B to 13D may be devised. The radiating fins 61 shown in FIG. 13B have a wave shape (wave shape). The heat radiating fins 61 shown in FIG. 13C have a shape bent along the circumferential direction of the lamp body 10. The heat dissipating fins 61 shown in FIG. 13D have a shape that is bent along the circumferential direction of the lamp body 10, and the tip portion has a tapered shape. In addition, the front-end | tip part of the radiation fin 61 shown in FIG.13 (c) and FIG.13 (d) is facing substantially upward, and becomes a shape where heat | fever escapes upwards. Further, as shown in FIG. 13 (e), the radiating fins 61a shown in FIG. 13 (a) are provided in the upper half of the lamp body 10, and the radiating fins 61b shown in FIG. 13 (d) are provided in the lower half of the lamp body 10. The structure provided may be sufficient. Further, as shown in FIG. 13 (f), heat receiving fins 61 ′ may be provided on the inner side of the lamp body 10 in order to make the heat balance between the outer side and the inner side of the lamp body 10 close to increase the heat radiation efficiency. good.

  Further, as shown in FIG. 14, the lamp body 10 may be integrally formed with an attachment portion 62 for attaching to the front bumper 102 (see FIGS. 1 and 2) that is an external housing. Further, the attachment portion 62 and the heat radiating fins 61 may be integrally formed on the lamp body 10. In this case, by cutting the extrusion molding material 60 extruded together with the attachment portion 62 and the heat radiation fin 61, the lamp body 10 in which the attachment portion 62 and the heat radiation fin 61 are integrally formed can be easily mass-produced. According to the configuration shown in FIG. 14A, after extrusion, a hole is formed in the mounting portion 62, and the lamp body 10 can be mounted on the front bumper 102 using the screw member 64. Further, according to the configuration shown in FIG. 14 (b), the slit body 62 is formed in the mounting portion 62 at the time of extrusion molding, and the lamp body 10 is attached to the front bumper 102 using the screw member 65 arranged so as to protrude from the slit 62a. It can be set as the structure attached to. Moreover, it is good also as a structure which enlarges the width | variety of the slit 62a, inserts a washer, and finely adjusts the position of the screw member 65 in the up-down direction.

  Moreover, you may devise arrangement | positioning of the radiation fin 61 as shown to Fig.15 (a) and FIG.15 (b). The heat radiation fins 61 shown in FIG. 15A are concentrated on the upper side from which heat escapes. According to this configuration, the heat dissipation effect can be enhanced, and material saving and weight reduction can be achieved. Further, the heat radiating fins 61 shown in FIG. 15B are provided only on the upper side from which heat escapes. According to this configuration, in addition to the above effects, the outer shape (indicated by a two-dot chain line in FIG. 15) can be reduced, so that the degree of freedom in design and the degree of freedom in vehicle layout can be increased. .

Further, as shown in FIG. 16, the lamp body 10 may be integrally formed with a fitting portion 66 that fits the transparent cover 20 and the rear cover 30. As shown in FIG. 16A, the fitting portion 66 extends in the axial direction (front-rear direction) of the lamp body 10, and is integrally formed at the time of extrusion molding. Further, as shown in FIG. 16B, the fitting portion 66 is provided so as to protrude toward the inner diameter side of the lamp body 10. Further, as shown in FIG. 17, a concave portion 21 a corresponding to the shape of the fitting portion 66 of the lamp body 10 is formed in the fitting portion 21 of the transparent cover 20. The recess 21a extends in the front-rear direction as shown in FIG. 17A, and is recessed on the inner diameter side as shown in FIG. 17B. Further, as shown in FIG. 18, a recess 31 a corresponding to the shape of the fitting portion 66 of the lamp body 10 is formed in the fitting portion 31 of the rear cover 30. The recess 31a extends in the front-rear direction as shown in FIG. 18 (a), and is recessed on the inner diameter side as shown in FIG. 18 (b). According to this configuration, it is possible to easily improve the positioning accuracy by providing the fitting portion 66 when the lamp body 10 is extruded and providing the positioning recesses 21a and 21b in the transparent cover 20 and the rear cover 30. It becomes.
In addition, a dent may be provided in the lamp body 10 and a protrusion may be provided in the transparent cover 20 and the rear cover 30, and the combination is arbitrary. Further, the positions of the protrusions or the recesses may be in the left-right direction, not in the up-down direction, and may not be arranged symmetrically about the axis. If it is necessary to further increase the positioning accuracy, the object can be achieved by increasing the number of protrusions and recesses.

  Moreover, as shown in FIG. 19, it is good also as a structure which provides the screw member 67 and 68 in the round pipe-shaped lamp body 10, and attaches it to the front bumper 102 which is an external housing | casing. FIG. 19A shows an attachment structure in which a screw member 67 (bolt) is welded to the lamp body 10. FIG. 19B shows a mounting structure in which a screw member 68 (stud bolt) is embedded in the lamp body 10. According to this configuration, as compared with the case where the mounting portion 62 as shown in FIGS. 14 and 15 is integrally formed by extrusion, a dedicated mold for extrusion is not required, which can contribute to cost reduction and achieve weight reduction. be able to.

  Moreover, as shown in FIG. 20, the structure which provides the angle adjustment mechanism which adjusts the attachment angle with respect to the front bumper 102 of the lamp body 10 arbitrarily may be sufficient. This angle adjustment mechanism is configured by devising an attachment site with the front bumper 102. As shown in FIG. 20A, the lamp body 10 includes a screw member 69a and a screw member 69b that are welded while being displaced in the front-rear direction. The screw member 69 a is inserted into the hole 102 a formed in the front bumper 102, and the screw member 69 b is inserted into the hole 102 b formed in the front bumper 102. As shown in FIG. 20B, the hole portion 102b has a long hole shape extending in the vertical direction, and the screw member 69b has the screw member 69a inserted into the hole portion 102a having a round hole as a fulcrum. It is configured to be movable. According to this configuration, the mounting angle of the lamp body 10 can be adjusted by tightening with the nut 70a and the nut 70b. Further, according to this configuration, since the mechanism is simple, the cost of the aiming mechanism can be reduced.

  For example, in the above-described embodiment, the configuration in which the present invention is applied to the fog lamp 1 has been described. However, the present invention can also be applied to other vehicle headlamps, for example, headlamps.

  DESCRIPTION OF SYMBOLS 1 ... Fog lamp (vehicle headlamp), 10 ... Lamp body, 11 ... One end side opening, 12 ... Other end side opening, 20 ... Transparent cover, 40 ... Illumination optical system, 41 ... LED (semiconductor light emitting element) , 60 ... extruded material, 61 ... heat radiating fin, 62 ... mounting portion, 66 ... fitting portion

Claims (9)

A vehicle headlamp that houses an illumination optical system in a lamp chamber inside a lamp body,
The lamp body has a cylindrical shape extending in a predetermined direction,
A transparent cover that covers the one end side opening of the lamp body;
A vehicular headlamp comprising: a rear cover that covers the opening on the other end side of the lamp body and supports the illumination optical system.   The vehicle headlamp according to claim 1, wherein the lamp body is formed of an extrusion molding material.   The vehicle headlamp according to claim 2, wherein the lamp body has a heat radiating fin formed integrally therewith. The lamp body is attached to an external housing,
The vehicle headlamp according to claim 2 or 3, wherein the lamp body is integrally formed with an attachment portion for attachment to the external housing. The lamp body and the cover are fitted,
The vehicle headlamp according to any one of claims 2 to 4, wherein the lamp body is integrally formed with a fitting portion with the cover.   The vehicle headlamp according to any one of claims 1 to 5, wherein the lamp body is subjected to black alumite treatment.   The said rear cover is formed from the heat conductive material which transfers at least one part of the heat | fever emitted from the said illumination optical system to the said lamp body, It is any one of Claims 1-6 characterized by the above-mentioned. The vehicle headlamp described.   The vehicular headlamp according to claim 1, wherein the illumination optical system includes a semiconductor light emitting element. The lamp body is attached to an external housing,
The vehicle headlamp according to claim 1, further comprising an angle adjustment mechanism that adjusts an attachment angle of the lamp body with respect to the external housing.

Images