JPH03280301A - Headlamp for vehicle - Google Patents

Abstract

PURPOSE:To reduce the number of assembly processes by providing a shade for covering the front part of a light source for low beam, arranged in a recessed part of a body, in such a way that the end part of a support leg of the shade is placed between a setting groove of the body and a peripheral wall part of a lens. CONSTITUTION:A headlamp unit 1 is composed of a lamp body 3, a lens 4 mounted on the front surface of the body 3, upper and lower discharge lamps 5, 5 provided in a separated way in a lamp unit space, and of a shade 6 arranged in front of the upper lamp 5u. A setting groove 8 formed on the opening end of the front surface of the body 3, is opened in a front direction, and is fitted to a peripheral wall 4b of the lens 4. The end part of a support leg 21 of the shade 6 for covering the front part of a light source 5 is placed between the setting groove 8 formed on the opening peripheral wall part of the body 3 provided with a recessed part 2 with its front surface opened, and the peripheral wall part 4b provided from the periphery of the lens to the rear part thereof, and is mounted on the body 3. Since the support leg 21 of the shade is placed between the setting groove 8 of the body and the peripheral wall 4b of the lens, there is no need for special parts, and the number of assembly processes can thus be reduced.

Description

[Detailed description of the invention] The vehicle headlamp of the present invention will be explained according to the following items.

Industrial application field Overview of the invention Prior art Problems to be solved by the invention Examples of means for solving the problems [Figs. 1 to 7] a. Headlight unit [Figs. 1 to 4] b. Lamp body [Fig. 1, Fig. 3, Fig. 4] C. Shade [Fig. 1, Fig. 3 to Fig. 6] d. Lens [Fig. 1 to Fig. 4] e. Discharge lamp [Fig. FIG. 1, FIG. 3, FIG. 4, FIG. 7] f. Effect of the discharge lamp circuit invention G.

(A. Industrial Application Field) The present invention relates to a novel vehicle headlamp. Specifically, by devising the mounting of the shade that covers the front of the low beam light source, the effective area of the reflector can be increased, and the number of parts and assembly man-hours can be reduced. The aim is to provide a headlight for a vehicle that is suitable for use in vehicles.

(B. Summary of the Invention) The vehicle headlamp of the present invention is configured such that a shade that covers the front of a low beam light source is attached to the vehicle headlight by using a recess whose front surface is opened at the end of the support leg of the shade. By installing the shade between the installation groove formed on the periphery of the opening of the void and the peripheral wall protruding rearward from the periphery of the lens, there is no need to attach a shade to the reflective surface of the reflector. , without narrowing the effective area of the reflective surface.
In addition, since the shade is attached using the attachment part of the lens to the body, no special parts are required for attachment, and assembly is easy, reducing the number of parts and assembly man-hours. It is possible.

(C, Prior Art) Vehicle headlights have two modes: a passing mode in which they emit a passing beam, and a driving mode in which they emit a running beam, and in the passing mode, they do not emit dazzling light to oncoming vehicles. Therefore, a shade is provided to cover the front of the light source so that direct light from the light source is not emitted in front of the headlamp.

In order to arrange such a shade in front of the light source, the rear end of the support leg of the shade is fixed to a part of the reflecting surface of the reflecting mirror by rivets, screws, or the like.

(D. Problem to be Solved by the Invention) However, in the vehicle headlamp as described above, since the end of the support leg of the shade is fixed to the reflective surface of the reflector, the fixed part does not function as a reflective surface, reducing its function as a vehicle headlight, and requires parts such as rivets and screws that are unnecessary for the original function of the vehicle headlight, and furthermore, it requires assembly. There was a problem that the number of man-hours increased.

(E. Means for Solving Problem 11) Therefore, in order to solve the above-mentioned problems, the vehicle headlamp of the present invention has an installation groove formed at the periphery of the opening of the body having a recess with an open front surface. The end of the support leg of the shade that covers the front of the light source is interposed between the peripheral wall projecting rearward from the periphery of the lens and the shade is attached to the body.

Therefore, according to the vehicle headlamp of the present invention, since the attachment part for attaching the shade to the body is not formed on the reflective surface, the effective area of the reflective surface is not narrowed, and the installation groove of the body Since only the ends of the supporting legs of the shade are interposed between the peripheral wall of the lens, no special parts are required for attaching the shade, and the number of assembly steps is also reduced.

(F. Embodiment) [FIGS. 1 to 7] Details of the vehicle headlamp of the present invention will be described below according to the illustrated embodiment.

In the illustrated embodiment, the vehicle headlamp of the present invention is applied to a headlamp unit 1 in which the inside of the reflector is divided into upper and lower parts, and a discharge lamp is disposed in each part.

(a, Headlight unit) [Figures 1 to 4] The headlight unit 1 includes a lamp body 3 having a recess 2 with an open front, and is attached to the lamp body 3 so as to cover the front opening. The lens 4 and these lamp bodies 3 and lenses 4
Two discharge lamps 5.5 are arranged spaced apart in the vertical direction in a lamp space defined by , and a shade is arranged in front of the upper discharge lamp 5u among the discharge lamps 5.5. It consists of 6.

(b, lamp body) [Figures 1, 3, and 4] The lamp body 3 has a rectangular shape slightly elongated in the left and right direction when viewed from the front, and its inner surface is formed as a reflective surface. , the reflecting surface is roughly divided into upper and lower halves, with paraboloids of revolution 3u and 3d formed in the upper and lower parts, respectively, and an upper paraboloid of revolution 3u and a lower paraboloid of revolution 3d. A narrow stepped portion 7 facing upward is formed at the boundary between the two.

Reference numeral 8 designates an installation groove that is formed at the front opening edge of the lamp body 3 and opens toward the front, into which a peripheral wall portion of a lens 4, which will be described later, is fitted.

Also, the paraboloid of revolution 3u of the lamp body 3.

An insertion hole 9.9 is formed at the rear top of the lamp body 3, and a hole protrudes toward the rear so as to surround the insertion hole 9.9 from a position slightly away from the mouth edge of the lamp body 3. An annular mounting cylinder 10.10 is formed.

(c, Shade) [Figs. 1, 3 to 6] The shade 6 is connected to a covering part 11 that mainly covers the front of the upper discharge lamp 5u, and a lower end of the covering part 11, and extends in the left-right direction. The lower support part 12 engages with the installation groove 8 of the lamp body 3 and supports the cover part 11.

The cover part 11 includes a front plate 13, an upper plate 14 extending rearward from the upper edge of the front plate 13, a lower cover plate 15 extending rearward from the lower edge of the front plate 13, and a rearward side from both left and right edges of the front plate 13. It consists of extended left and right side plates 16.16. The side plates 16.16 have upper protruding pieces 16a, 16a that protrude upward from the upper plate 14 and lower protruding pieces 16b, 16 that protrude downward from the lower cover plate 15.
A mounting piece 17.17 is formed on the lower protruding pieces 16b, 16b to protrude outward from the lower edge thereof, and a mounting piece 17.17 is formed to protrude outward from the upper edge of the upper protruding piece 16a, 16a. A projecting upper support piece 18.18 is formed, and an upper upright mounting piece 19.19 having an L-shape when viewed from the side is attached to the front end of the upper support piece 18.18.
9a extends obliquely upward and rearward from the front end of the upper support piece 18.18, and the other pieces 19b, 19b are formed so as to extend upward from the rear end of the upper support piece 18.18.

The fill is formed by punching a sheet metal into the shape shown in FIG. 6(A), and then bending the boundaries between each plate or multiple pieces.

In addition, in FIG. 6(A), the broken line is a mountain fold line, and the dashed-dot line is a valley fold line.

The lower support part 12 includes a partition plate 20 having a shape between the center horizontal cross section of the recess 2 of the lamp body 3 and a gap between the partition plates 20 and 20.
Support legs 21.21 project downward from both left and right ends of the front edge of the support leg 21, and extend outward from the outer ends thereof.
Left and right mounting pieces 22 and 22, which are formed on the outer edge of each of the parts 1 and 21 and have an L-shape when viewed in plan, are integrally formed.

The lower support portion 12 is formed by punching a sheet metal into the shape shown in FIG. 6(B), and then bending the boundaries between each plate or multiple pieces.

In FIG. 6(B), the broken lines are mountain fold lines, and the dashed and dotted lines are valley fold lines.

Thus, the shade 6 is arranged such that the covering part 11 is located at the front end of the partition wall plate 20 of the lower support part 12 and approximately at the middle in the left-right direction, and the mounting pieces 17 of the left and right side plates 16, 16. 17 is placed on the partition plate 20 and fixed by spot welding or the like.

In the shade 6 formed in this manner, each of the L-shaped mounting pieces 19, 19, 22, 22 is engaged with the installation groove 8 of the lamp body 3, and the peripheral edge of the partition plate 20 excluding the front edge is as described above. The lens 4 is placed on a stepped portion 7 at the boundary between the paraboloids of revolution 3u and 3d and positioned relative to the lamp body 3, and the lens 4 is mounted in the installation groove 8 of the lamp body 3 as described later. The shade 6 is fixed to the lamp body 3 by being fitted through the pieces 19, 19, 22, 22.

Note that the rear end edges of the upper plate 14, lower cover plate 15, and left and right side plates 16, 16 of the shade 6 are arranged so as to be located slightly in front of the focal point of the upper paraboloid of revolution 3u of the lamp body 3.

(d, Lens) [Figures 1 to 4] The lens 4 is made of transparent synthetic resin or glass, and includes a front part 4a having approximately the same shape as the opening surface of the lamp body 3, and a peripheral edge of the front part 4a. A peripheral wall portion 4b protruding approximately rearward is formed integrally with the peripheral wall portion 4b, and the rear end portion of the peripheral wall portion 4b is inserted into the installation groove 8 of the lamp body 3 to fit each of the numbered pieces 19 and 19 of the shade 6. The lens 4 is coupled to the lamp body 3 by being fitted through the .22 and .22 and filling the fitting portion with adhesive 23.

That is, each piece 19, 19, 22, 22 with a number number extends rearward from the connection part with the upper support piece 18.18 or support leg 21.21, and one piece 19a, 19a, 22a, 22a has an installation groove. The other piece 19b11 extends upward, leftward, or rightward from the rear edge of the one piece 19a119a, 22a, 22a along the inner circumferential surface 8a of 8.
9b, 22b, 22b are respectively positioned along the bottom surface 8b of the installation groove 8 and positioned relative to the lamp body 3. In this state, the installation groove 8 is filled with adhesive 23, and then the installation groove 8 is filled with adhesive 23. The rear end of the peripheral wall 4a of the lens 4 is fitted into the inside of the lamp body 8, and the lens 4 is fixed to the lamp body 3 with adhesive.
．． 19, 22, and 22 are supported by the lamp body 3 and the lens 4 in a pinched manner.

As described above, the shade 6 is attached to the recess 2 of the lamp body 3.
It will be placed at a predetermined position within.

Therefore, the shade 6 arranged in this manner removes dazzling light from the luminous flux emitted from the discharge lamp 5u for the low beam as described below.

That is, since the rear opening surface formed by the rear end edges of each cover plate 14.15 and left and right side plates 16.16 of the shade 6 is located at a position slightly forward of the center of the discharge section of the discharge lamp 5u, which will be described later, Of the luminous flux emitted from the discharge section, the luminous flux emitted forward and in the vertical and horizontal directions is blocked by the shade 6, so a discharge lamp 5u is placed in front of the headlamp unit 1.
Since the light beam is no longer irradiated directly from the lens, dazzling light is eliminated. Further, among the luminous fluxes of the discharge lamp 5u, the luminous flux emitted backward is reflected by the paraboloid of revolution 3u and irradiated forward as a luminous flux substantially parallel to the optical axis. And, shade 6 has almost all of its plates (14, 15, 16, 16
) are parallel to the optical axis, so that the reflected light is emitted to the front of the headlamp unit through the lens 4 without being obstructed.

Incidentally, a suitable lens step is formed on the lens 4, so that a desired light distribution can be obtained.

(e, Discharge lamp) [FIGS. 1, 3, 4, and 7] The discharge lamp 5 consists of a bulb 24 and a holder 25.

Reference numeral 26 designates a glass bulb of the bulb 24, which is formed integrally with an elliptical discharge portion 27 and pinch seal portions 28 and 28 protruding from both ends of the discharge portion 27 in opposite directions.

29. 29 is a metal foil, and the pinch seal portion 28.
It is buried in 28.

Reference numerals 30 and 30 designate electrode rods, one end of which protrudes into both ends of the internal space of the discharge section 27, the other end of which is buried separately in the pinch seal sections 28 and 28, and the metal foil 29.
．． 29 respectively. One end portions 30a, 30a protruding into the discharge portion 27 serve as discharge electrodes.

31.31 is a lead wire, one end of which is embedded in the pinch seal portion 28.28 and connected to the metal foil 29.29, and the other end protrudes from the outer end surface of the pinch seal portion 28.28. .

The holder 25 consists of an insulating base 32 and two lead supports 33,34.

The insulating base 32 is formed by integrally forming a substantially disk-shaped base 32a and a protrusion 32b protruding from the front surface of the base 32a.The protrusion 32b is slightly smaller than the base 32a and has a slightly thicker thickness. It has a shape similar to that of a thick disk with the upper end cut off, and is arranged approximately concentrically with the base 32a, so that due to the difference in shape between the base 32a and the protrusion 32b,
The outer edge of the base 32a projects like a flange.

The lead supports 33 and 34 have a proximal portion buried in the insulating base 32, and a tip portion 33a that protrudes forward;
The lead wires 31 and 31 of the valve 24 are connected to the parts 34a and 33b that protrude from the rear surface of the insulating base 32.
, 34b are connection terminals.

Two discharge lamps 5 configured in this way are prepared and inserted into the two insertion holes 9, 9 of the lamp body 3 from behind, and the protruding portions 3 of the insulating bases 32, 32
2b, 32b are inserted through the insertion hole 9°9, and the base 32a,
32a is fitted into the mounting tube 10.10. Then, the outer edges of the base parts 32a, 32a of the insulating base 32.32 come into contact with the rear surface of the flange part 35.35, which is formed by the difference between the diameter of the insertion hole 9.9 and the inner diameter of the mounting cylinder parts 10, 10. , the discharge lamp 5.5 is positioned relative to the lamp body 3, and at this time the discharge part 27 of the discharge lamp 5.5
．． 27 is located at the focal point of each of the paraboloids of revolution 3u and 3d.

In addition, the mounting tube/portion 10.10 provided on the lamp body 3
The length of the insulating base 32.32 is more than twice the thickness of the base portions 32a, 32a, and the adhesive 37.37 is filled in the recess 36.36 formed by this shape difference.
Then, the discharge lamp 5.5 is fixed to the lamp body 3, and the connection terminal 33b1 is solidified.
Discharge between 33b and 34b, 34b is prevented.

(f, discharge lamp circuit) 38 is a lighting circuit section of the discharge lamp 5.5, which consists of, for example, an LC load, an igniter circuit, and an igniter starting circuit. It is attached to the rear with screws. Then, the output terminal (not shown) of the lighting circuit section 38 and the connection terminals 33b, 33b% 34b1 of the discharge lamp 5.5 are connected.
34b through cords 40, 40, . . .

41 is a stabilizing circuit section of the discharge lamp 5.5, for example, a DC
It consists of a booster circuit, a DC-AC push-pull inverter circuit, and a control circuit, and these circuits are housed in a case body 42 and attached to a vehicle body, etc., and the stabilizing circuit section 41 and the lighting circuit section 38 are connected to a cord 43. 43, . . . , and the input terminal of the stabilizing circuit section 41 is connected to a battery (not shown).

(G. Effects of the Invention) As is clear from the above description, the vehicle headlamp of the present invention has an installation groove that is formed at the periphery of the opening of the body, which has a concave portion with a front opening, and which is opened to the front. In a vehicle headlamp fitted with a peripheral wall protruding rearward from the periphery of a lens that covers the front opening of the body, it covers the front side of the low beam light source disposed within the recess of the body. The present invention is characterized in that the shade is attached to the body with the end of the support leg of the shade interposed between the installation groove of the body and the peripheral wall of the lens.

Therefore, according to the vehicle headlamp of the present invention, since a handle for attaching to a shaded body is not formed on the reflective surface, the effective area of the reflective surface is not narrowed, and
Since only the ends of the supporting legs of the shade are interposed between the installation groove of the body and the peripheral wall of the lens, no special parts are required for mounting the shade, and the number of assembly steps is also reduced.

In the above embodiments, the vehicle headlamp of the present invention is applied to a headlight unit in which the inside of the reflector is divided into upper and lower parts and discharge lamps are disposed separately. The headlights are not limited to these, for example, headlights that use halogen bulbs may be used, and headlights that use a light bulb that includes a low beam light source and a running beam light source are also applicable. It's okay.

Further, in the above embodiment, the vehicle headlamp of the present invention has been described in which a reflecting surface is formed on the inner surface of the lamp body, but the present invention is not limited to this, and the dump body and the reflecting mirror may be separate bodies. It can also be applied to things.

Furthermore, the specific configurations shown in the above embodiments are merely examples of implementing the vehicle headlamp of the present invention, and the technical scope of the present invention should not be construed as limited by these. must not be done.

[Brief explanation of drawings]

1 to 7 show an example of implementation of the vehicle headlamp of the present invention, in which FIG. 1 is an exploded perspective view, FIG. 2 is a front view, and FIG. 3 is a view shown in FIG. FIG. 4 is an enlarged sectional view taken along line III--IV in FIG. 2, FIG. 5 is an enlarged perspective view of the shade, and FIG. 6 shows parts constituting the shade. ) is a developed view of the cover part, (B) is a developed view of the lower support part, and FIG. 7 is an enlarged sectional view of the discharge lamp. Explanation of symbols 1...Vehicle headlight, 3...Body, 4...4 b...5...8...18...19...21...22...Lens,...(lens) peripheral wall part , ・Light source, 6...shade, ・Installation groove, ・・(shade) support leg, ・・(shade support leg) end, ・・(shade) support leg, ・・(shade support) Fig. 6 0) Fig. (B)

Claims (1)

[Scope of Claims] A peripheral wall portion protruding rearward from the periphery of a lens that covers the front opening of the body is fitted into a mounting groove that is formed at the periphery of the opening of the body and has a concave portion opening at the front. In the vehicle headlamp to be combined, a shade covering the front of the low beam light source disposed in the recess of the body is connected, and the end of the support leg of the shade is connected to the installation groove of the body and the peripheral wall of the lens. A vehicle headlamp characterized in that it is attached to the body interposed between the