JPH01320702A - Head lamp for automobile - Google Patents

Abstract

PURPOSE:To restrain projection amounts of a lamp body by providing a recess at a part where the front end part of an adjusting rod is positioned among a reflection mirror, and arranging the operation shaft connected with a bevel gear such that it is more neared to the adjusting rod at the rear end than at the front end. CONSTITUTION:A recess 51 is provided for the reflection mirror 13 of a head lamp 1 for automobile so that it may store the front end part 40 of an adjusting rod 39. Among the recess 51, 53a is made in paraboloid so that it may become and effective reflection face. Bevel gears 66 and 67 are connected to rotate the rod 39. Since the axes of 66 and 67 are so inclined that they are more separated so they go forward, the operation shaft 64 connected to the gear 67 inclines such that it parts from the rod 39 at the front. Since the recess is formed in the reflection mirror this way, the depth of the head lamp can be made small. Also, since the operation shaft and the adjusting rod are arranged inclinedly, the projection amounts of the lamp body can be made small.

Description

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

A Industrial field of application B1 Overview of the invention C4 Prior art [Figure 10 C09 Problem to be solved by the invention [Figures 10 and 11] E Means for solving the problem F Example [Figure 1] [FIGS. 9 to 9] Effects of the G0 Invention (A. Industrial Application Field) The present invention relates to a novel automobile headlamp, and more specifically, a reflector is tiltable in a space defined by a lamp body and a lens. In an automobile headlamp supported by a vehicle, the depth of the automobile headlight is reduced, and the tilting operation of the reflector can be performed from the front side of the automobile headlamp, and the tilting operation of the reflector is performed from the front side. It is an object of the present invention to provide a new headlamp for an automobile in which a mechanism for this purpose does not protrude significantly from the side of the headlamp.

(B. Summary of the Invention) The automobile headlamp of the present invention supports a reflector with respect to a lamp body by one rotation fulcrum and two interval adjustment parts, and the interval adjustment part is supported by the reflection mirror. a nut body, an adjustment rod supported rotatably and immovably in the axial direction by the lamp body, and whose front end is screwed to the nut body, and two bevel gears meshed with each other. A gear unit in which a bevel gear is connected to the rear end of the adjustment rod, and an operating shaft whose front end is located close to the front end of the side surface of the lamp body and whose rear end is connected to the other bevel gear of the gear unit. At the same time, a recess is formed on the front side of the part of the reflector where the nut body is supported, thereby reducing the depth and making it possible to tilt the reflector from the front side of the automobile headlamp. The mechanism for performing the tilting operation can be prevented from protruding significantly to the side of the automobile headlamp.

(C, Prior Art) [Figure 10] When a reflector is tiltably supported by the lamp body within the lamp space defined by the lamp body and lens, there is usually one pivot point and two space adjustment points. The reflector is supported on the lamp body by the parts.

FIG. 10 shows m pieces a of such automobile headlights.

b is a lamp body made of synthetic resin, and has a concave portion C open toward the front. A lens d is attached to the lamp body b so as to cover the front opening thereof.

Denoted at e is a reflecting mirror, which is tiltably supported by the lamp body b by one rotation fulcrum and two interval adjustment parts.

Reference numeral f denotes a rotation fulcrum, which is composed of a support shaft g supported by a lamp body b and a receiver supported by a reflector e. The support shaft g has a helical shaft part i at its rear end, which is screwed onto the rear part of the lamp body b, and a spherical part j at its front end.
are integrally formed. The receiver is made of synthetic resin, has a concave spherical recess k that is open on the rear surface, and is supported by the rear end of a bracket that protrudes rearward from the rear surface of the reflector e. The spherical part j of the support shaft g is fitted into the spacer, and the ball joint-like rotation fulcrum part f is formed here. It consists of a lot n and a nut body 0 supported by a reflecting mirror e. The adjustment lot n consists of a screw shaft part p and a head q, and the head q projects toward the rear side of the lamp body b. The nut body O is supported by the rear end of a bracket part r that projects rearward from the rear surface of the reflector e, and the front end of the adjustment rod n is screwed into this nut body 0, so that the distance adjustment part m is constructed.

When the adjustment rod n is rotated, the screw shaft p is screwed into the nut body 0 or returned to the nut body 0, so that the lamp body b and the reflection The distance between mirror e is adjusted.

(D. Problem to be solved by the invention) [Figure 10, 1
[Figure 1] By the way, the problem with the above-mentioned conventional automobile headlamp a is that the amount of rearward protrusion of the interval adjustment portion m increases, resulting in an increase in the depth of the automobile headlamp a. There is.

That is, in the interval adjustment part m, the adjustment rod n is screwed into the nut body 0, and its front end protrudes forward from the nut body 0, and furthermore, from this state, the adjustment rod n is further twisted into the nut body 0. Natsuto 0
The amount of protrusion forward may increase. For this reason, a corresponding distance is required between the rear end of the bracket part r on which the nut body 0 is supported and the rear surface of the reflector e, and the amount of protrusion of the bracket part r from the rear surface of the reflector e must be It inevitably has to become bigger. Therefore, the portion of the lamp body b that supports the adjustment rod n is also forced to move rearward, and a rearward protrusion S is formed on the lamp body b.

Therefore, there is a problem in that the depth of the vehicle headlamp a becomes larger due to the formation of the protruding portion S.

On the other hand, as the equipment and functions of automobiles are increasing, the space within the engine room is becoming smaller and smaller. As described above, the increase in the depth of the automobile headlamp affects the space in the engine room adjacent to the installation part thereof.

Furthermore, it is conceivable that the adjustment lot n shown in FIG. 11 is intended to be rotated from the front side of the automobile headlamp a.

A spur gear t is fixed to a portion of the adjustment rod n that protrudes from the rear end of the lamp body b, and an operating shaft U extends along the front-rear direction under the lamp body b and is rotatably supported by the lamp body b or a vehicle body (not shown). A spur gear V is fixed to the rear end of the gear, and two spur gears t and V are meshed with each other.

Thus, when the operating shaft U is rotated, the adjustment rod n is also rotated via the spur gear V-spur gear t.

However, in the case shown in Fig. 11,
There is a problem in that the spur gear V and the operating shaft U protrude far outward from the outer edge of the automobile headlamp a, resulting in an extremely large overall shape.

(E. Means for Solving the Problems) Therefore, the automobile headlamp of the present invention has been made to solve the above-mentioned problems, and includes a reflector in the lamp body.
The space adjustment part is rotatably supported by a nut body supported by a reflector and the lamp body, but not movable in the axial direction. an adjustment rod which is supported and whose front end is screwed to the nut body; a gear unit comprising two mutually meshed bevel gears, one of which is connected to the rear end of the adjustment rod; and a lamp body whose front end is connected to the adjustment rod. and an operating shaft located close to the front end of the side surface of the gear unit, the rear end of which is connected to the other bevel gear of the gear unit, and a recess is formed in the front side of the part where the nut body of the reflector is supported. be.

Therefore, in the automobile headlamp of the present invention, since the recess is formed in the front side of the part of the reflector that is supported by the nut body into which the front end of the adjustment rod is screwed, the depth can be reduced. The mechanism for rotating the adjustment rod from the front side is made up of two bevel gears that are meshed with each other, one of which is connected to the rear end of the adjustment rod, and an operating shaft whose rear end is connected to the other of these bevel gears. Since the adjustment rod and the operating shaft are arranged so that they are separated at the front end but close to each other at the rear end, it is possible to minimize the amount of outward protrusion of the lamp body.

(F. Embodiment) [FIG. 1 to FIG. 9C] Below, details of the automobile headlamp of the present invention will be explained according to Embodiment 1, which illustrates the details.

2 is a lamp body made of synthetic resin, and has four parts 3 that are open toward the front. And the lamp body 2
The front opening has a substantially rectangular shape. An installation groove 4 that opens forward is formed at the edge of the opening, and
A circular opening 5 is formed in the center of the rear part, a short cylindrical part 6 is formed that projects rearward from the edge of the opening 5, and an engaging edge 7 that projects outward is formed at the rear end of the cylindrical part 6. has been done.

Reference numeral 8 denotes a lens, which is integrally formed with a front surface portion 9 having a shape that covers 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 of the lamp body 10 is fitted into the installation groove 4 of the lamp body 2 and fixed with an adhesive 11.

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

Reference numeral 13 denotes a reflecting mirror that is tiltably disposed within the lamp space 12 and is made of synthetic resin. Reflector 1
3 is formed integrally with a paraboloidal portion 14 having a substantially rectangular shape when viewed from the front and flat portions 15 and 16 connected above and below the paraboloidal portion 14.

Reference numeral 17 denotes a circular light bulb attachment hole formed approximately at the center of the paraboloidal portion 14, and an annular protrusion 18 protrudes from the rear surface adjacent to the attachment hole 17.

A reflective film is formed on the inner surface of the reflective mirror 13 by aluminum vapor deposition.

Reference numeral 19 denotes a light bulb with a base, which consists of a glass bulb 21 with a filament 20 sealed inside and a base 22 attached to the rear of the glass bulb 21. The base 22 has a flange 2.
3 is attached.

In the light bulb 19 with a cap, the glass bulb 21 is pushed through the light bulb mounting hole 17 of the reflector 13 from behind, the outer edge of the flange 23 is brought into contact with the rear surface of the opening edge of the mounting hole 17, and the annular protrusion 1
A pressing spring 24, which is engaged with the flange 8, is brought into elastic contact with the rear surface of the flange 23, and thereby is attached to the reflecting mirror 13.

The filament 20 is then positioned close to the focal point F of the paraboloid section 14.

The reflecting mirror 13 as described above is tiltably supported by the lamp body 2 by one rotation fulcrum part and two interval adjustment parts.

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

26 is a support shaft, and a flange 27 is formed in the middle.
The rear part from 7 is an embedded part 28, and knurling is formed on its outer surface, and a spherical part 29 is integrally formed at the front end. The embedded portion 28 is embedded in a 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 integrally formed with a main part 33 having a concave spherical recess 32 opening on the rear surface and a mounting part 34 protruding forward from the front surface of the main part 33. A groove 35 is formed between the main portion 33 and the attachment portion 34.

Reference numeral 36 designates a bracket portion that integrally projects 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.

The mounting portion 34 of the receiver 31 is inserted from the rear into the mounting hole 37 of the bracket portion 36, and the groove 35 engages with the opening edge of the mounting hole 37 of the bracket portion 36, thereby supporting the reflecting mirror 13. be done.

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

The interval adjustment portions are formed at a position below and to the lower left of the position where the rotation fulcrum portion 25 is provided when viewed from the front. Since the two spacing adjustment parts have the same structure, the one located below the rotation fulcrum part 25 (bottom right) will be explained in detail, and the one provided at the bottom left will be explained in detail. A detailed explanation will be omitted by adding ``'J'' to the reference numerals used.

38 is an interval adjustment section.

Reference numeral 39 denotes an adjustment rod, which consists of three parts: a middle part, a front part, and a rear part. The front part 40 is formed into a spiral part, and the middle part 4
A collar 42 is formed at the rear end of the middle part 41, and a locking groove 43 extends in an annular shape at a position slightly forward from the collar 42 of the intermediate portion 41.
is formed.

The rear portion 44 is a connecting portion having a substantially rectangular cross section.

45 is 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.

A portion of the adjustment rod 39 in front of the collar 42 is inserted into the insertion hole 45 from the rear. In addition, 47 is the intermediate part 41
a washer fitted externally so as to be in contact with the front surface of the collar 42;
Reference numeral 8 designates an O-ring externally fitted onto the intermediate portion 41 so as to be in contact with the front surface of the washer 47. The front surface of the washer 47 is in contact with the rear end of the annular protrusion 46, and the O-ring 48 is adjusted with the annular protrusion 46. It is fitted between the intermediate portion 41 of the rod 39 and compressed between the washer 47 and the rear surface of the lamb body 2. 49 is a stop washer, and the intermediate portion 4
A locking groove 43 is externally fitted onto a portion protruding into the lamp body 2 of No. 1, and a locking edge 50 at the inner edge thereof is formed in the intermediate portion 41.
The lamp body 2 is held in elastic contact with the inner surface of the lamp body 2. In this way, the adjustment rod 39 is rotatably supported on the rear wall of the lamp body 2 without moving in the axial direction.

Reference numeral 51 denotes a recess formed in the reflecting mirror 13 and having a substantially prismatic shape extending in the front-rear direction, with three walls 52a, 52b, 52c defining the sides and 2 defining the front end.
It is surrounded by two walls 53a and 53b and is open downward. The rear end is limited by a plate-shaped bracket part 54 integrally formed with the reflecting mirror 13, and the bracket part 5
4 has a mounting hole 55 formed therein.

and a wall portion 53a that limits the front end portion of the recessed portion 51;
A wall portion 53a located on the center side of the reflecting mirror 13 among the portions 53b
The front surface is a paraboloid. This paraboloid has a focal length shorter than the focal point of the paraboloid of the paraboloid section 14, and the focal point is the focal point F of the paraboloid section 14.
It is in the same position as . Therefore, the front surface of the wall portion 53a serves as an effective reflective surface.

56 is a nut body made of synthetic resin.

The nut body 56 includes a main part 57 having a slightly thick plate shape and a mounting leg part 58 protruding forward from the center of the front surface of the main part 57.
are integrally formed.

The mounting leg portion 58 is divided into two portions 58a, 58a by a 7-shaped cut groove 59, and each portion 58a, 58
Engagement grooves 60 and 60 are formed on the outer surface of the base portion of a, respectively. A pilot hole 61 is formed through the entire nut body 56 in the front-rear direction.

Then, attach the mounting leg portion 58 to the bracket portion 54 of the reflecting mirror 13.
It is inserted into the hole 55 from the rear. Then, each part 58a, 58a of the mounting leg part 58 is pressed by the respective outer surface or the upper and lower edges of the mounting hole 55, and bends so that their tips touch each other, and the upper and lower widths become smaller. It is inserted into the mounting hole 55 up to the base and its engagement groove 60.60
engages with both upper and lower edges of the mounting hole 55, and at this time, each portion 58a, 58a of the mounting leg portion 58 returns to the position of the path light.

In this way, the nut body 56 is supported by the bracket portion 54 of the reflecting mirror 13.

Then, the screw shaft portion 40 of the adjustment rod 39 is connected to the nut body 5.
6, and the front end of the helical shaft portion 40 or the recess 5
Projected within 1.

Thus, when the adjustment rod 39 is rotated, the screw shaft portion 40 is screwed into or unscrewed into the nut body 56 depending on the direction of rotation. Since the adjustment 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 adjustment rod 39, and therefore the portion of the reflecting mirror 13 that supports the nut body 56, that is, the bracket portion 54 is moved. That is, when the adjustment rod 39 is rotated in the tear-filling direction, the bracket portion 54 moves rearward, and when the adjustment rod 39 is twisted and rotated in the return direction, the bracket portion 54 moves forward.

Therefore, the adjustment rod 3 in the spacing adjustment part 38, 38'
9.39' are operated at the same time, the reflecting mirror 13 is rotated in the vertical direction, and the adjustment rod F39 in the interval adjustment section 38' is rotated.
′ rotates the reflector 13 in the left-right direction, and when the adjustment rod 39 in the interval adjustment section 38 is operated, the reflection mirror 13 rotates diagonally around the line connecting the rotation fulcrum section 25 and the interval adjustment section 38'. It will rotate.

62 is an operating mechanism for operating the adjustment rod 39 from the front side. The operating mechanism 62 includes a gear unit 63 and an operating shaft 64.

The gear unit 63 consists of a case 65 and two beher gears 66.
．． It consists of 67. The two helical carriers 66 and 67 are rotatably supported in the case 65 in a vertically aligned and engaged state, and are tilted so that their axes move away from each other as they move forward. A connecting hole 68 is provided through the center of the upper first bevel gear 66 . The connecting hole 68 has a substantially rectangular cross-sectional shape. Further, a press-fit hole 69 is provided through the center of the second bevel gear 67 on the lower side.

Reference numerals 70 and 70 denote mounting pieces that protrude outward from both left and right sides of the case 65. The mounting piece 70.70 is fixed to the lower part of the rear surface of the lamp body 2 by screws 71.71. At this time, the connecting portion 4 of the adjustment rod 39
4 is engaged with the connecting hole 68 of the first bevel gear 66.

The operating shaft 64 has a long shaft shape, has a head 72 with a plus groove formed at its front end, and its rear end is press-fitted into a press-fit 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, through which a guide hole 74 becomes narrower toward the rear. The head 72 of the operation shaft 64 is formed into a substantially guide hole 74.
It is located at the rear end of.

If the tip of a suitable jig, for example, a Phillips head screwdriver, is inserted into the guide hole 74 from the front side, engaged with the Phillips groove of the head 72, and rotated, the operating shaft 64 will be rotated. , that is the second bevel gear 67-first
The adjustment rod 39 is rotated by being transmitted through the bevel gear 66.

75 is a rubber cover, the inner end of which is fitted over the base 22 of the light bulb 19, the outer end is fitted over the cylindrical part 6 formed at the rear 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 automobile headlamp of the present invention includes a lamp body having a recess opening toward the front, and a lamp body that is attached to the lamp body so as to cover the opening. A headlamp for an automobile comprising a lens attached to the lamp body and a reflector supported on a lamp body so as to be tiltable within the recess, the reflector having one rotation fulcrum part and two interval adjustment parts on the lamp body. The spacing adjustment part is supported by a nut body supported by a reflector, and the lamp body is rotatably but immovably supported in the axial direction, and the front end is screwed into the nut body. a gear unit comprising: an adjustment rod, a gear unit comprising two bevel gears meshed with each other, one of which is connected to the rear end of the adjustment rod; comprises an operating shaft connected to the other bevel gear of the gear unit, and is characterized in that a recess is formed on the front side of a portion of the reflecting mirror where the nut body is supported.

Therefore, in the automobile headlamp of the present invention, since the recess is formed in front of the part of the reflector that supports the nut body into which the front end of the adjustment rod is screwed, the depth is reduced. In addition, the mechanism for rotating the adjustment rod from the front side is composed of two bevel gears that are meshed with each other and one of which is connected to the rear end of the adjustment rod, and an operating shaft whose rear end is connected to the other of these bevel gears. With this configuration, the adjustment rod and the operating shaft are arranged so that they are separated 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 kept to a minimum.

[Brief explanation of the drawing]

1 to 9 show an example of implementation of the automobile headlamp of the present invention, in which FIG. 1 is a front view, FIG. 2 is a sectional view taken along line II-II in FIG. 1, and FIG. Figure 3 shows m − in Figure 1.
4 is a sectional view taken along line IV--IV in FIG. 1, FIG. 5 is an enlarged sectional view taken along line V-V in FIG. 1, FIG. 6 is a rear view, and FIG. Fig. 7 is a front view of the reflector, Fig. 8 is an enlarged sectional view taken along line ■-■ in Fig. 7, Fig. 9 is a sectional view taken along line IX-IX in Fig. 7, and Fig. 10 is a conventional one. FIG. 11 is a cross-sectional view of the main parts of an example of an automobile headlamp, and FIG. 11 is a cross-sectional view of the main parts showing an improved example thereof. Explanation of symbols 1...Car headlamp, 2...Lamp body, 3...Concave portion, 8...Lens, 13...Reflector, 25...Rotation fulcrum, 38. ... Spacing adjustment part, 39 ... Adjustment lot, 44 ... Rear end of adjustment port/socket, 51 ... Recessed part, 56 ... Seat body, 63 ...
・Gear unit, 66... Hel gear on one side, 67... Bevel gear on the other side Applicant: Koito Seisakusho Co., Ltd.

Claims (1)

[Claims] A front for an automobile, comprising a lamp body having a recess opening toward the front, a lens attached to the lamp body so as to cover the opening, and a reflector supported by the lamp body so as to be tiltable within the recess. In the illumination lamp, the reflector is supported by one rotation fulcrum part and two interval adjustment parts on the lamp body, and the interval adjustment part is rotatable by the nut body supported by the reflection mirror and the lamp body. an adjusting rod supported immovably in the axial direction and having a front end screwed to the nut body; and two bevel gears meshing with each other, one bevel gear being connected to the rear end of the adjusting rod. and an operating shaft whose front end is located close to the front end of the side surface of the lamp body and whose rear end is connected to the other bevel gear of the gear unit,
An automobile headlamp characterized in that a recess is formed on the front side of the part of the reflector where the nut body is supported.