JPH0828121B2 - Automotive headlights - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The automotive headlamp of the present invention will be described in accordance with the following items.

A. Industrial field of use B. Outline of the invention C. Prior art [Fig. 10] D. Problems to be solved by the invention [Figs. 10 and 11] E. Means for solving the problems F. Embodiment [FIGS. 1 to 9] G. Effect of the invention (A. Field of industrial application) The present invention relates to a novel automotive headlamp, and more specifically, it is defined by a lamp body and a lens. In a vehicle headlamp in which a reflector is tiltably supported in a space, the depth of the vehicle headlamp is reduced and the tilting movement of the reflector can be performed from the front side of the vehicle headlamp, and An object of the present invention is to provide a novel vehicle headlight in which a mechanism for tilting the mirror from the front side does not largely project to the side part of the vehicle headlight.

(B. Outline of the Invention) In a headlight for an automobile of the present invention, a reflector is supported by a rotary fulcrum part and two gap adjusting parts with respect to a lamp body, and the gap adjusting part is supported by the reflector. Nut body,
The lamp body is rotatably and immovably supported in the axial direction, and is rotatably supported in a vertically aligned state with an adjusting rod whose front end is screwed to the nut body. Has two bevel gears that are inclined so as to separate toward the front, and a gear unit in which the rear end of the adjusting rod is engaged with a connecting hole penetrating the center of one bevel gear and the front end of the lamp body A portion of the side surface of the reflecting mirror that is located near the front end and that has a rear end that is press-fitted into a press-fitting hole that penetrates the center of the other bevel gear of the gear unit and that supports the nut body of the reflecting mirror. A concave portion is formed on the front side of the vehicle so that the depth can be reduced and the tilting movement of the reflecting mirror can be performed from the front side of the vehicle headlight, and a mechanism for tilting the reflecting mirror is provided in the automobile. It can be as not to protrude significantly headlamp side.

(C. Prior art) [Fig. 10] When the reflector is tiltably supported by the lamp body in the lamp space defined by the lamp body and the lens, it is usually 1
The reflecting mirror is supported on the lamp body by one rotation fulcrum portion and two gap adjusting portions.

 FIG. 10 shows an example a of such a vehicle headlamp.

Reference numeral b denotes a lamp body made of synthetic resin, which has a recess c that is open toward the front. Reference numeral d denotes a lens, which is attached to the lamp body b so as to cover its front opening.

Reference numeral e denotes a reflecting mirror, which is tiltably supported by the lamp body b by one rotation fulcrum portion and two gap adjusting portions.

Reference numeral f denotes a rotation fulcrum portion, which includes a support shaft g supported by the lamp body b and a receiving body h supported by the reflecting mirror e. A rear end of the support shaft g is a screw shaft portion i, the screw shaft portion i is screwed to the rear portion of the lamp body b, and a spherical body portion j is integrally formed at the front end. The receiving body h is made of synthetic resin, has a concave spherical concave portion k opened on the rear surface, and is supported by a rear end portion of a bracket portion 1 protruding rearward from the rear surface of the reflecting mirror e. A spherical portion j of the support shaft g is fitted in k, and a spherical joint-shaped rotation fulcrum portion f is formed therein.

m is an interval adjusting unit, which is composed of an adjusting rod n rotatably supported by the lamp body b and a nut body o supported by a reflecting mirror e. The adjusting rod n includes a screw shaft portion p and a head portion q, and the head portion q is projected to the rear surface side of the lamp body b. The nut body o is supported by a rear end portion of a bracket portion r projecting rearward from the rear surface of the reflecting mirror e, and a front end portion of an adjusting rod n is screwed into the nut body o so that a gap adjusting portion is formed. m is constructed.

Then, when the adjusting rod n is rotated, its screw shaft portion p
Is screwed in or unscrewed from the nut body o, so that the distance between the lamp body b and the reflecting mirror e in the distance adjusting portion m is adjusted.

(D. Problem to be Solved by the Invention) [FIGS. 10 and 11] By the way, in the above-described conventional automotive headlamp a, the amount of rearward projection is increased by the interval adjusting portion m. Therefore, there is a problem that the depth of the vehicle headlamp a becomes large.

That is, in the interval adjusting portion m, the adjusting rod n is screwed into the nut body o, the front end portion thereof projects forward from the nut body o, and from that state, the adjusting rod n is further extended.
May be screwed into the nut body o, which may increase the amount of protrusion from the nut body o to the front. Therefore, a corresponding gap is required between the rear end of the bracket portion r supporting the nut body o and the rear surface of the reflecting mirror e, and the amount of protrusion of the bracket portion r from the rear surface of the reflecting mirror e is reduced. It inevitably grows. Therefore, the portion of the lamp body b on which the adjusting rod n is supported is forced to move rearward, and a rearward protruding portion s is formed on the lamp body b.

Therefore, there is a problem that the depth of the vehicle headlamp a becomes large as much as the protrusion s is formed.

On the other hand, as the equipment and functions of automobiles are increasing, the space in the engine room is becoming smaller and smaller. Further, as described above, increasing the depth of the vehicle headlamp affects the space of the engine room adjacent to the arrangement portion.

Further, it is considered that the adjusting rod n is to be rotated from the front side of the vehicle headlamp a as shown in FIG.

An operating shaft having a spur gear t fixed to a portion of the adjusting rod n protruding from the rear end of the lamp body b and extending along the front-rear direction below the lamp body b and rotatably supported by the lamp body b or a vehicle body (not shown). A spur gear v is fixed to the rear end of u, and two spur gears t and v are meshed with each other.

Then, when the operation shaft u is rotated, the adjusting rod n is rotated via the spur gear v and the spur gear t.

However, in the case shown in FIG. 11,
There is a problem that the spur gear v and the operation shaft u largely protrude outward from the outer edge of the vehicle headlamp a, and the overall shape becomes extremely large.

(E. Means for Solving the Problem) Therefore, the vehicle headlamp of the present invention is made to solve the above-mentioned problem, and the reflecting mirror is provided on the lamp body with one rotation fulcrum portion and two. It is tiltably supported by two distance adjusting parts, and the distance adjusting part is supported rotatably and immovably in the axial direction by the nut body supported by the reflecting mirror and the lamp body, and the front end portion is The adjustment rod screwed to the nut body and two bevel gears that are rotatably supported in a vertically aligned state and meshed with each other and whose axes are inclined so as to separate from each other toward the front are provided. A gear unit in which a rear end of the adjusting rod is engaged with a connecting hole formed in the center, and a front end of the gear unit is located close to a front end of a side surface of the lamp body and a rear end of the bevel gear is the other bevel gear of the gear unit. In the center of Consists swiped an operation shaft which is pressed into the press hole is obtained by forming a recess in the front portion nut of the reflector is supported.

Therefore, in the vehicle headlamp of the present invention, since the concave portion is formed on the front side of the portion of the reflecting mirror on which the nut body to which the front end portion of the adjusting rod is screwed is supported, the depth is reduced. , A mechanism for rotating the adjusting rod from the front side is composed of two bevel gears, one of which is meshed with each other and one of which is connected to the rear end of the adjusting rod, and an operating shaft of which the rear end is connected to the other of these bevel gears. With this configuration, the adjusting rod and the operating shaft are arranged such that they are separated from each other at the front end but close to each other at the rear end, so that the amount of outward protrusion of the lamp body can be minimized.

(F. Embodiment) [FIGS. 1 to 9] Hereinafter, details of a vehicle headlamp according to the present invention will be described in accordance with a first embodiment.

Reference numeral 2 is a lamp body made of synthetic resin, and has a concave portion 3 which is open toward the front. The front opening of the lamp body 2 has a substantially rectangular shape. A mounting groove 4 that opens forward is formed at the edge of the opening, a circular opening 5 is formed at the center of the rear portion, and a short tubular portion 6 that projects rearward from the edge of the opening 5 is formed. The tubular portion 6
An engaging edge 7 that projects outward is formed at the rear end.

Reference numeral 8 denotes a lens, which is formed by integrally forming a front surface portion 9 having a shape covering the front opening of the lamp body 2 and a peripheral wall portion 10 protruding substantially rearward from the outer peripheral edge of the front surface portion 9. A rear end portion 10 is fitted in the installation groove 4 of the lamp body 2 and fixed by an adhesive 11.

Thus, a lamp space 12 defined by the lamp body 2 and the lens 8 is formed.

Reference numeral 13 is a reflecting mirror that is tiltably arranged in the lamp space 12 and is made of synthetic resin. The reflecting mirror 13 includes a parabolic surface portion 14 having a substantially rectangular shape when viewed from the front and the parabolic surface portion.
A flat surface portion 15 and a flat surface portion 16 which are continuously provided above and below 14 are integrally formed.

Reference numeral 17 denotes a circular light bulb mounting hole formed in a substantially central portion of the parabolic surface portion 14, and an annular ridge 18 is provided near the mounting hole 17 on the rear surface.
Is protruding.

Then, on the inner surface of the reflecting mirror 13, a reflecting film is formed by aluminum vapor deposition.

Reference numeral 19 denotes a light bulb with a base, which is composed of a glass bulb 21 in which a filament 20 is enclosed and a base 22 attached to the rear of the glass bulb 21, and a flange 23 is attached to the base 22. There is. The bulb 19 with the base has a glass ball 21 inserted from the rear into the bulb mounting hole 17 of the reflecting mirror 13 so that the outer edge portion of the flange 23 is brought into contact with the rear surface of the opening edge portion of the mounting hole 17 to form an annular ridge 18. The presser spring 24 that is attached is elastically contacted with the rear surface of the flange 23,
As a result, it is attached to the reflecting mirror 13. Then, the filament 20 is positioned close to the focal point F of the parabolic surface portion 14.

The reflecting mirror 13 as described above is tiltably supported by the lamp body 2 by one rotation fulcrum portion and two gap adjusting portions.

The rotation fulcrum portion 25 is arranged at the upper right position when viewed from the front.

Reference numeral 26 is a support shaft, a collar 27 is formed in the middle, a rear portion from the collar 27 is an embedded portion 28, knurls are formed on the outer surface thereof, and a spherical portion 29 is integrally formed at the front end. .
The embedded portion 28 is embedded in the boss portion 30 formed integrally with the lamp body 2 and fixed to the lamp body 2.

Reference numeral 31 denotes a synthetic resin receiver, which is formed by integrally forming a main portion 33 having a concave spherical concave portion 32 opened on the rear surface and a mounting portion 34 protruding forward from the front surface of the main portion 33, Main part 33
A groove 35 is formed between the mounting portion 34 and the mounting portion 34.

Reference numeral 36 denotes a bracket portion integrally provided so as to project rearward from the rear surface of the reflecting mirror 13, is formed in a hollow shape, and has a mounting hole 37 formed in the rear end surface.

In the receiving body 31, the mounting portion 34 is inserted from the rear into the mounting hole 37 of the bracket portion 36, and the groove 35 is engaged with the opening edge of the mounting hole 37 of the bracket portion 36, thereby supporting the reflecting mirror 13. To be done.

Then, the spherical portion 29 of the support shaft 26 is fitted into the concave portion 32 of the receiving body 31, thereby forming the ball joint-shaped rotation fulcrum portion 25.

The space adjusting portion is formed at a position below the position where the rotation fulcrum portion 25 is provided and at a lower left position as viewed from the front. Since the two space adjusting portions have the same structure, the one located below (lower right) the rotation fulcrum 25 will be described in detail, and the one provided on the lower left will be the one on the lower right. The reference numerals used in the above are added with the reference numerals attached with “′”, and detailed description thereof will be omitted.

 38 is a space | interval adjustment part.

Reference numeral 39 is an adjusting rod, which is made up of three parts: an intermediate part, a front part, and a rear part. The front portion 40 is formed on a screw shaft portion, a collar 42 is formed on a rear end of the intermediate portion 41, and an engaging groove 43 extending annularly is formed at a position closer to the front of the collar 42 of the intermediate portion 41. Has been done. The rear portion 44 is a connecting portion having a substantially rectangular cross section.

Reference numeral 45 denotes an insertion hole formed in the rear wall of the lamp body 2, and an annular protrusion 46 is formed on the rear surface of the lamp body 2 so as to surround the insertion hole 45 at a distance from the insertion hole 45.

The adjusting rod 39 is inserted into the insertion hole 45 from the rear at the front part from the flange 42. Incidentally, 47 is a washer externally fitted to the intermediate portion 41 so as to be in contact with the front surface of the collar 42, and 48 is an O-ring externally fitted to the intermediate portion 41 so as to be in contact with the front surface of the washer 47. Comes into contact with the rear end of the annular protrusion 46, the O-ring 48 is fitted between the annular protrusion 46 and the intermediate portion 41 of the adjusting rod 39, and is compressed between the washer 47 and the rear surface of the lamp body 2. Has been done. 49 is a stop washer, which is externally fitted to the portion of the intermediate portion 41 protruding into the lamp body 2, and the engaging edge 50 of the inner edge thereof is engaged with the engaging groove 43 formed in the intermediate portion 41. , Lamp body 2
It is elastically contacted to the inner surface of. In this way, the adjusting rod
39 is rotatably supported on the rear wall of the lamp body 2 and is not moved in the axial direction.

Reference numeral 51 denotes a concave portion formed in the reflecting mirror 13 and extending in the front-rear direction and formed in a substantially prismatic shape, and has three wall portions 52a, 52b, 52c defining side portions and two wall portions 52a, 52b, 52c defining front end portions. Wall 53
It is surrounded by a and 53b and opens downward. The rear end is limited by a plate-shaped bracket portion 54 formed integrally with the reflecting mirror 13, and a mounting hole 55 is formed in the bracket portion 54.

Then, the wall portions 53a, 53b that limit the front end portion of the recess 51.
Of these, the front surface of the wall portion 53a located on the center side of the reflecting mirror 13 is a parabolic surface. And this paraboloid is the paraboloid
The parabolic surface has a focal length shorter than that of the parabolic surface of 14, and the focal point is at the same position as the focal point F of the parabolic surface portion 14. Therefore, the front surface of the wall portion 53a is an effective reflection surface.

 56 is a nut body made of synthetic resin.

The nut body 56 has a thick plate-like main portion 57 and the main portion 57.
Is integrally formed with a mounting leg portion 58 projecting forward from the center of the front surface of the. Then, the mounting leg portion 58 is divided into two portions 58a, 58a by the V-shaped cut groove 59, and each portion 58 is divided.
Engagement grooves 60, 60 are formed on the outer side surfaces of the base portions of a, 58a, respectively. A lower hole 61 is formed in the nut body 56 so as to penetrate the entire nut body 56 in the front-rear direction.

Then, the mounting leg portion 58 is inserted from the rear into the mounting hole 55 of the bracket portion 54 of the reflecting mirror 13. Then, the outer surfaces of the respective portions 58a, 58a of the mounting leg portion 58 are pressed by the upper and lower edges of the mounting hole 55 and are bent so that their tips come into contact with each other, and the upper and lower widths are reduced. The hole 55 is inserted up to the base portion, and the engaging grooves 60, 60 engage with the upper and lower edges of the mounting hole 55, and at this time, the respective portions 58a, 58a of the mounting leg portion 58 return to the substantially original positions. . In this way, the nut body 56 makes the reflector
It is supported by 13 bracket portions 54.

Then, the screw shaft portion 40 of the adjusting rod 39 is screwed into the lower hole 61 of the nut body 56, and the front end portion of the screw shaft portion 40 is projected into the recess 51.

Then, when the adjusting rod 39 is rotated, the screw shaft portion 40 is screwed into or unscrewed from the nut body 56 depending on the direction of the rotation. Since the adjusting rod 39 cannot move in the axial direction with respect to the lamp body 2, the nut body 56 moves along the screw shaft portion 40 of the adjusting rod 39, and therefore the nut body 56 of the reflecting mirror 13. That is, the portion that supports, that is, the bracket portion 54 is moved. That is, when the adjusting rod 39 is rotated in the screwing direction, the bracket portion 54 moves rearward, and when the adjusting rod 39 is rotated in the screwing back direction, the bracket portion 54 moves forward.

Therefore, the adjustment rod 39,
When the mirrors 39 'are operated simultaneously, the reflecting mirror 13 rotates in the vertical direction, and when the adjusting rod 39' in the interval adjusting section 38 'is operated, the reflecting mirror 13 rotates in the horizontal direction, and the adjusting rod 39 in the interval adjusting section 38'. When is operated, the reflecting mirror 13 is turned obliquely about the line connecting the turning fulcrum part 25 and the space adjusting part 38 '.

Reference numeral 62 is an operating mechanism for operating the adjusting rod 39 from the front side. The operating mechanism 62 comprises a gear unit 63 and an operating shaft 64.

The gear unit 63 includes a case 65 and two bevel gears 66 and 67.
Consists of The two bevel gears 66 and 67 are rotatably supported in the case 65 in a state where they are vertically aligned and meshed with each other, and the axes of the two bevel gears are inclined so as to separate as they go forward.
A connecting hole 68 is formed at the center of the upper first bevel gear 66.
Is pierced. The connecting hole 68 has a substantially rectangular cross section. Further, a press-fitting hole 69 is formed at the center of the lower second bevel gear 67. Reference numerals 70 and 70 denote mounting pieces that are provided so as to project outward from both left and right sides of the case 65. Then, the mounting pieces 70, 70 are fixed to the lower portion of the rear surface of the lamp body 2 by screws 71, 71. And at this time the adjusting rod
The connecting portion 44 of 39 is engaged with the connecting hole 68 of the first bevel gear 66.

The operation shaft 64 has a long shaft shape, has a head portion 72 having a plus groove formed in the front end portion, and the rear end portion is press-fitted into the press-fitting hole 69 of the second bevel gear 67.

Reference numeral 73 denotes a guide piece protruding from the lower surface of the lamp body 2, and a guide hole 74 that becomes thinner toward the rear is formed therethrough. The head 72 of the operating shaft 64 is located substantially at the rear end of the guide hole 74.

Then, by inserting an appropriate jig, for example, the tip of a Phillips screwdriver into the guide hole 74 from the front side, engaging the Phillips groove of the head 72, and rotating it, the operating shaft 64 is rotated. , Which is transmitted through the second bevel gear 67 and the first bevel gear 66 to rotate the adjusting rod 39.

Reference numeral 75 denotes a rubber cover, the inner end of which is externally fitted to the base portion 22 of the light bulb 19, the outer end of which is externally fitted to the tubular portion 6 formed at the rear portion of the lamp body 2, and the engaging edge 7 Is engaged with.

(G. Effects of the Invention) As is clear from the above description, the vehicle headlamp of the present invention is provided with a lamp body having a recessed portion that opens toward the front surface, and a lamp body that covers the opening. An automotive headlamp comprising a mounted lens and a reflecting mirror supported by a lamp body so as to be tiltable in the recess, wherein the reflecting mirror has one rotation fulcrum portion and two
The gap adjusting unit is supported by a reflector and a nut body that is rotatably and immovably supported by the lamp body, and the front end portion is supported by the nut body. Equipped with a screwed adjustment rod and two bevel gears that are rotatably supported in a vertically aligned state and meshed with each other, and their axes are inclined so as to move away from each other in the forward direction. A gear unit in which the rear end of the adjusting rod is engaged with the connecting hole, and the front end is located close to the front end of the side surface of the lamp body and the rear end penetrates the center of the other bevel gear of the gear unit. The operation shaft is press-fitted into the press-fitting hole provided, and a concave portion is formed on the front side of the portion of the reflecting mirror where the nut body is supported.

Therefore, in the vehicle headlamp of the present invention, since the concave portion is formed on the front side of the portion of the reflecting mirror on which the nut body to which the front end portion of the adjusting rod is screwed is supported, the depth is reduced. , A mechanism for rotating the adjusting rod from the front side is composed of two bevel gears, one of which is meshed with each other and one of which is connected to the rear end of the adjusting rod, and an operating shaft of which the rear end is connected to the other of these bevel gears. With this configuration, the adjusting rod and the operating shaft are arranged such that they are separated from each other at the front end but close to each other at the rear end, so that the amount of outward protrusion of the lamp body can be minimized.

[Brief description of drawings]

1 to 9 show an example of the implementation of the vehicle headlight according to the present invention. FIG. 1 is a front view and FIG. 2 is a front view.
A sectional view taken along line II-II, FIG. 3 is a sectional view taken along line III-III in FIG. 1, and FIG. 4 is a sectional view taken along line IV-IV in FIG.
5 is an enlarged sectional view taken along the line VV of FIG. 1, FIG. 6 is a rear view, FIG. 7 is a front view of a reflecting mirror, and FIG. 8 is VI of FIG.
An enlarged sectional view taken along the line II-VIII, and FIG. 9 is IX-IX in FIG.
FIG. 10 is a sectional view taken along the line, FIG. 10 is a sectional view of an essential part showing an example of a conventional automotive headlamp, and FIG. 11 is a sectional view of an essential part showing an improved example thereof. Explanation of symbols 1 ... Automotive headlight, 2 ... Lamp body, 3 ... Recess, 8 ... Lens, 13 ... Reflector, 25 ... Rotation fulcrum section, 38 ... Spacing adjustment section, 39 …… Adjustment rod, 44 …… Adjustment rod rear end, 51 …… Recess, 56 …… Nut body, 63 …… Gear unit, 64 …… Operation shaft, 66 …… One bevel gear, 67 …… Other bevel gear , 68 …… Connection hole, 69…
… Press fit hole

Claims (1)

[Claims] 1. A lamp body having a recess opening toward the front surface, a lens attached to the lamp body so as to cover the opening, and a reflecting mirror tiltably supported by the lamp body in the recess. A headlamp for an automobile provided, wherein the reflector is supported by the lamp body by one rotation fulcrum part and two gap adjusting parts, and the gap adjusting part is a nut body supported by the reflector. The lamp body is rotatably and immovably supported in the axial direction, and is rotatably supported in a state of being vertically aligned with an adjusting rod whose front end is screwed to the nut body.
A gear unit having two bevel gears whose axes are inclined so as to separate from each other toward the front, and a rear end of the adjusting rod is engaged with a connecting hole penetrating the center of one of the bevel gears, and a front end. Is located near the front end of the side surface of the lamp body, and the rear end is press-fitted into a press-fitting hole penetrating the center of the other bevel gear of the gear unit. An automotive headlamp, characterized in that a recess is formed on the front side of the portion on which the