JPH0817042B2 - Automotive headlights - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a structure of an automobile headlamp, and more particularly to a cross-sectional shape of a lower surface region of a lamp body of the automobile headlamp.

[Prior Art and Problems to be Solved by the Invention]

An automobile headlamp has a structure in which a front lens is attached to a front opening of a container-shaped lamp body.
In recent years, the lamp body has a laterally elongated shape so that the main beam irradiation portion and the sub-beam irradiation portion are adjacent to each other, and the lower surface region of the lamp body is extended to the front rather than the upper surface region of the lamp body so that the front opening There is a tendency to construct a headlight by assembling a front lens having a shape with a small air resistance, which is shaped like a front end portion of a vehicle body, in which a design surface region is largely inclined rearward. In a headlight with such a structure,
Since the lower surface area of the lamp body is long in the left-right direction and large in the depth direction, there is a problem that the lower surface area of the lamp body is easily deformed. However, in the conventional art, the shape of the lamp body has not taken any measures to secure strength.

The present invention has been made in view of the above-mentioned problems of the prior art, and an object of the present invention is to provide a vehicle headlamp in which the strength of the lower surface region of the lamp body is increased.

[Means for solving the problem]

In order to achieve the above object, in a vehicle headlamp according to the present invention, a front lens is assembled in a front opening of a container-shaped lamp body in which a lower surface region extends forward than an upper surface region. In the headlight, the lower surface area of the lamp body is formed in a V-shaped cross section in which a substantially half area on the front side is inclined downward toward the front, and the V-shaped cross section of the lower surface area of the lamp body is carried by the vehicle body. It is configured as follows.

[Action]

According to the above-mentioned configuration, the longitudinal cross section in the front-rear direction of the lower surface region of the lamp body has a V-shape, and both the second moment of area and the second polar moment of area of this L-shaped cross section have a flat lower surface. Larger than those of the rectangular cross section of the region, the rigidity against bending and torsional deformation is increased.

Further, the supported portion of the vehicle body provided at the bent portion of the cross section of the lower surface area of the lamp body is provided by the existence of the lamp body lower surface area that extends forward from the supported portion forming position and inclines downward toward the front. The relative amount of protrusion below the body becomes small.

〔Example〕

 Next, an embodiment of the present invention will be described with reference to the drawings.

1 to 5 show an embodiment of a vehicle headlamp according to the present invention. FIG. 1 is a front view of the headlamp, and FIG. 2 is a horizontal sectional view thereof (shown in FIG. 1). Sectional view taken along line II-II),
3 and 4 are vertical sectional views (sectional views taken along lines III-III, IV-IV shown in FIG. 2), respectively, and FIG. 5 (a) is an exploded perspective view of the valve mounting and fixing mechanism. FIG. 5B is an exploded perspective view of another example of the valve mounting and fixing mechanism.

In these drawings, reference numeral 2 is a container-shaped synthetic resin lamp body, which comprises a bowl-shaped main reflecting mirror portion 3 and a cylindrical holding portion 4 adjacent to the main reflecting mirror portion 3.

The main reflecting mirror section 3 has a reflecting surface 5 in the shape of a paraboloid of revolution that is open toward the front, and a valve mounting hole 6 is formed at the rear apex of the main reflecting mirror section 3. A valve 7 is attached to. On the other hand, the holding portion 4 has a frame shape facing the front-rear direction, and is integrally formed on one side wall of the main reflecting mirror portion 3 by a continuous wall 9 extending substantially in the front-back direction. Also,
At the rear end of the holding unit 4, a converging / reflecting lens barrel that is a sub-reflecting mirror unit.
13 are assembled. The converging / reflecting lens barrel 13 has a spheroidal reflecting surface 15, and a valve mounting hole 16 is formed in the rear top portion of the lens barrel 13, and a valve 17 is mounted in the mounting hole 16.

As shown in FIG. 5 (a), the bulb 7 is an H ₁ type bulb in which the lighting unit 7a and the base 7b are integrated, and the base 7b
A flange 7c is provided around the flange 7c, and a front end region of the flange 7c is inserted into the valve insertion hole 6. At the rear end of the valve 7, a flat plate-shaped negative terminal 7d and a rectangular tubular positive terminal 7e, which are insulated from each other, are provided in a protruding manner. The valve 17 attached to the lens barrel 13 which is the sub-reflecting mirror portion has the same structure as the valve 7.

A peripheral wall 22 that surrounds the valve insertion hole 6 is formed on the rear top of the main reflecting mirror portion 3, and the valve 7 inserted into the valve insertion hole 6 from the back side of the main reflecting mirror portion 3 is a plate spring. It is designed to be pressed and fixed by 24. The valve 7 is electrically connected to an adapter 26 press-fitted into the peripheral wall 22, and the adapter 26 is fixed to the peripheral wall 22 by a set spring 29.

Details of the mounting and fixing mechanism of the valve will be described with reference to FIG.

In the plate spring 24, the both end engaging portions 24a and 24b have the peripheral wall 2
2 The peripheral wall 22 is engaged with the engaging projection 23 formed on the inner peripheral surface.
The thin plate donut-shaped pressing portion 24c is set inside and presses and fixes the valve flange 7c to the peripheral edge portion of the valve insertion hole.

Further, the adapter 26 has a columnar shape having a flange portion 26a that abuts on the upper end surface 22a of the peripheral wall, and internally has terminals (not shown) electrically connectable to the terminals 7d and 7e of the valve. A pair of terminals 27a, 27b that are electrically connected to the terminals are provided in a protruding manner at the rear end of the adaptor 26. An electric source side connector (not shown) can be connected to the pair of terminals 27a and 27b. An O-ring 28 is attached to the outer peripheral surface of the adapter 26,
22 It is designed to be waterproof inside and outside. Further, a set spring 29 is provided on the peripheral wall 22 to press and fix the adaptor 26 inserted into the peripheral wall 22. Reference numeral 29a is a hooking portion for hooking the set spring, which is projectingly provided on the peripheral wall 22.

The mounting and fixing mechanism of the valve 17 on the side of the sub-reflecting mirror is also the same as the mounting and fixing mechanism of the valve 7, and the description thereof will be omitted.

Further, the mounting and fixing mechanism of the valve 7 (17) may have the structure shown in FIG. 5 (b). That is, instead of the set spring 29 described above, the adapter 26 may be pressed and fixed by the locking cap 30 that engages with the peripheral wall 22. When using this locking cap 30, the valve 7 is a locking cap 30 and an adapter 26.
Since it is pressed and fixed to the peripheral edge portion of the valve insertion hole 6 via, the plate spring 24 as described above is unnecessary. Reference numeral 32 is an engaging portion that is formed on the outer peripheral surface of the peripheral wall 22 so as to project and engages with an engaging claw (not shown) of the locking cap 30.

Reference numeral 34 is a projection lens arranged in front of the lens barrel 13 via a support cylinder 36, and is adapted to project light at a predetermined position in front of the vehicle. Reference numeral 38 is a light shielding plate which is disposed between the reflecting surface 15 and the projection lens 34 and blocks light traveling in a predetermined direction, whereby a low beam can be obtained in the secondary reflected light portion 13.

Reference numeral 2a is the lower surface area of the lamp body, and this lower surface area
2a extends largely forward of the lamp body upper surface region 2b, and the front opening of the lamp body 2 has a shape that opens obliquely upward. A seal groove 2c is provided around the front opening of the lamp body 2.
The seal leg 42 of the front lens 40 is engaged with this. The front lens 40 is in the shape of a container, and when it is attached to the lamp body 2, the design surface area 41 is substantially parallel to the front opening of the lamp body. When this headlight unit is assembled to the vehicle body 44, the design surface area of the front lens is
41 is flush with the front end inclined surface 44a of the vehicle body 44 to reduce air resistance.

Further, as shown in FIGS. 3 and 4, the lamp body lower surface area 2a has a V-shaped cross section that is bent obliquely forward and downward at a substantially central portion 2d in the depth direction, and the lamp body lower surface area is flat. The structural strength is higher than that of the straight shape.

That is, the headlamp unit is supported by the lamp housing 48 that is mounted and fixed to the vehicle body, but is a fixed fulcrum of the ball joint structure provided at the right end position of the lower surface region 2a of the lamp body.
50, a vertically movable fulcrum 60 provided on the back side of the lamp body 2 at a substantially central position in the left-right direction, and a horizontally movable fulcrum 70 provided on the left side wall of the lamp body 2, which are located in substantially the same plane 3 It is carried in the lamp housing 48 by one fulcrum. The symbol L in FIG. 1 indicates a horizontal plane on which the fulcrums 50, 60, 70 exist. Therefore, although a bending deformation force and a torsion deformation shearing force act on the lamp body 2, the lower surface region 2a of the lamp body has a V-shaped cross section that bends in the depth front-back direction as described above. The lamp body 2 has high rigidity against deformation and torsional deformation.
The entire structure is not easily deformed.

The fixed fulcrum 50 is composed of a sphere 52 supported on the lamp housing 48 side and a sphere receiving portion 54 on the lamp body side for supporting the sphere 52. Further, the sphere 52 is formed on the projecting end of the receiving member 51 provided on the lamp housing 48, and the sphere receiving portion 54 is a rib provided on the lower surface of the bent portion 2d of the lower surface region 2a of the lamp body.
It is formed in 2e.

Further, in this embodiment, the lower surface region 2a of the lamp body has a bent cross section, and the fixing fulcrum 50 is provided at the bent portion 2d position, so that the lamp body lower surface region 2a is fixed as compared with the case of being flat. There is also an advantage that the amount of downward projection of the fulcrum 50 is small, the vertical height of the lamp housing 48 can be reduced accordingly, and the lamp housing space of the vehicle body can be reduced accordingly.

The vertically movable fulcrum 60 is rotatably supported with respect to the lamp housing 48, and is supported by an adjusting screw 62 arranged in the vertical direction and a bracket 64 projecting from the back side of the lamp body 2 to adjust the adjustment. A ball receiving member 66 that supports the lower end spherical body 63 of the screw 62. The code
Reference numeral 62a is a bearing that is provided in the lamp housing 48 and supports the adjustment screw 62. Further, the bracket 64 is formed with an arc-shaped horizontal groove 65 centered on the fixed fulcrum 50, and the ball receiving member 66 assembled in the horizontal groove 65 can be moved along the horizontal groove 65. ing.

The horizontally movable fulcrum 70 is supported by the lamp housing 48 and is supported by a horizontally arranged adjusting screw 72 and a bracket 74 projecting from a lower portion of the left side wall of the lamp body 2 to support the adjusting screw 72. And a ball receiving member 76 that supports the tip spherical body 73. Reference numeral 75 is a bearing that supports the adjusting screw 72.

In FIGS. 3 and 4, reference numeral 80 is a front lens.
Aluminum tape (hereinafter referred to as Al
82, which is called a tape, is a metallic glossy surface formed by adhering with an adhesive. As in this embodiment, the front lens 40
In the headlamp in which the design surface area 41 is largely inclined upward, it can be seen that the front lens lower side wall 42a is formed in front of the lamp body lower surface area 2a through the lens design surface area 41. A light reflecting surface 2a ₁ formed by silver coating is formed inside the lower surface area 2a of the lamp body, and a difference in color from the front lens lower side wall 42a is noticeable.
Therefore, a metallic glossy surface 80 is formed on the inside of the front lens lower side wall 42a so that the lamp body lower surface region 2a and the front lens lower side wall 42a.
A and a have the same color (silver color) to improve the appearance through the front lens 40.

As shown in FIG. 6, the Al tape 82 has a laminated structure in which aluminum 84 is vapor-deposited on the surface of a polyester film 83 and a protective film layer 85 is formed on the aluminum 84, and an adhesive 86 is uniformly formed on the back surface. Is applied to. The Al tape 82 extends along the extending direction of the lens lower side wall 42a (left and right direction in FIG. 2) and has a predetermined length (for example, 100 to 2) in the tape longitudinal direction.
00 mm), in other words, the gap d between the adjacent tapes 82, 82.
Are formed. If the tape 82 has a long shape of, for example, 300 mm or more, when the front lens 40 is made of polycarbonate, the polyester that is the main constituent material of the Al tape is larger than the thermal expansion coefficient of polycarbonate that is the material of the lens. However, if the lens cools after reaching a high temperature of, for example, 80 ° C. or higher, there is a problem that the tape is lifted from the affixing surface and easily peeled off, as shown in FIG. However, if the tape is divided into predetermined lengths as in this embodiment, the expansion and contraction of the tape 82 is absorbed in the gap d between the adjacent tapes, so that the tape 82 does not float.

Although it is possible to form a light reflecting surface on the inside of the lower side wall 42a of the front lens 40 by painting or vapor deposition, workability is poor with a complicated lens shape and a certain facility is required. Therefore, by sticking the Al tape 82 as in the present embodiment, the light reflecting surface can be easily formed.

〔The invention's effect〕

As is apparent from the above description, according to the headlamp of the present invention, the longitudinal cross section in the front-rear direction of the lower surface region of the lamp body has a V-shape, and the second moment of area and the second cross section of the V-shaped cross section. Both of the polar moments are larger than those of the rectangular cross section of the flat lamp body underside area,
Therefore, the lower surface region of the lamp body having the V-shaped cross section has high rigidity against bending deformation and torsional deformation, and a headlamp excellent in durability that is difficult to deform can be obtained.

In addition, since the relative amount of downward projection of the supported portion by the vehicle body provided in the cross-section bent portion of the lower surface region of the lamp body is small, the headlamp can be downsized and the headlamp housing space on the body side can be reduced. .

[Brief description of drawings]

FIG. 1 is a front view of a headlamp according to an embodiment of the present invention, and FIG.
The drawing is a sectional view taken along line II-II shown in FIG. 1, and FIG.
Fig. 4 is a sectional view taken along line III-III shown in Fig. 4, Fig. 4 is a sectional view taken along line IV-IV shown in Fig. 2, Fig. 5 (a) is an exploded perspective view of a valve mounting and fixing mechanism, and Fig. 5 ( b) is an exploded perspective view of another valve mounting and fixing mechanism, FIG. 6 is a sectional view of a light reflecting surface formed inside the lower wall of the front lens, and FIG. 7 is a conventional Al.
It is a perspective view of the light reflection surface by tape sticking. 2 …… Lamp body, 40 …… Front lens, 2a …… Lamp body lower surface area, 2b …… Lamp body upper surface area, 2d ……
The bend in the lower area of the lamp body.

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Toshiyuki Katsumata 500 Kitawaki, Shimizu City, Shizuoka Prefecture Koito Manufacturing Co., Ltd. Shizuoka Factory (56) Reference JP-A-64-18739 (JP, A) (JP, U) Actual opening Sho 58-71903 (JP, U) Actual opening Flat 2-49738 (JP, U)

Claims (1)

[Claims] 1. A vehicle headlamp in which a front lens is assembled in a front opening of a container-shaped lamp body, the lower surface region of which extends forward of the upper surface region, wherein the lower surface region of the lamp body has a front surface side. A vehicle headlamp, wherein substantially half of the region is formed in a V-shaped cross section that is inclined forward and downward, and the V-shaped cross-section bent portion of the lower surface region of the lamp body is carried by the vehicle body.