JPS6320006Y2 - - Google Patents

Description

[Detailed Description of the Invention] Industrial Application Field The present invention relates to a novel optical axis adjustment mechanism for a vehicle headlamp. Specifically, the spherical part of the base end of the adjustment shaft can be easily fitted inside the receiver, and the spherical part of the adjustment shaft can be fitted inside the receiver with respect to the mounting bracket on which the receiver is supported. A new vehicle front that can be easily installed as is, and can also be attached to the vehicle body or a fixed side member formed on the vehicle body with the tip of the adjustment shaft screwed into the nut. The purpose of this invention is to provide a mechanism for adjusting the optical axis of a lighting lamp.

BACKGROUND TECHNOLOGY AND PROBLEMS In vehicle headlights, in order to adjust the irradiation direction of the headlight, there is a member whose mounting angle relative to the vehicle body is changed, that is, a tilting member is fixed to the vehicle body or the vehicle body. That is, it is tiltably supported by an optical axis adjustment mechanism (hereinafter simply referred to as "adjustment mechanism") with respect to the fixed side member. As part of this adjustment mechanism, a receiver is attached to the tilting member (or the fixed side member) and has a recessed part having a concave spherical support surface inside. A mechanism is sometimes used that consists of an attached nut and an adjustment shaft that connects the receiver and the nut so that the distance between them can be changed. The adjustment shaft has a spherical head formed at the base end and a threaded groove at the tip.The head of the adjustment shaft is rotatably supported in the recess of the receiver, and the tip is screwed into the nut. be done. This creates a connection between the receiver and the nut. Therefore, by rotating the adjustment shaft in the screwing direction or unscrewing direction, the distance between the receiver and the nut, that is, the distance between the tilting member and the fixed side member, is changed, and the headlight is thereby changed. Since the installation angle of the light relative to the vehicle body will be changed,
The irradiation direction of the headlights is adjusted.

By the way, such headlamps and the like are generally manufactured by lamp manufacturers, and are mounted to the vehicle body by the vehicle manufacturer. That is,
The parts of the headlamp and adjustment mechanism described above are supplied as a kit to a vehicle manufacturer, and the headlamp and adjustment mechanism are assembled at the vehicle manufacturer. In this case, if the adjustment mechanism is supplied to the vehicle manufacturer without being incorporated into the headlight, the vehicle manufacturer will be required to attach the receiver to the headlight, attach the nut to the fixed side member, and connect the receiver and nut. All installation work, such as installing the adjustment shaft that connects the parts, must be performed. Furthermore, each headlamp is equipped with two sets of such adjustment mechanisms, and the left and right headlights are each equipped with such adjustment mechanisms, so the installation work described above requires an extremely large number of man-hours. Become something. Furthermore, since the adjustment shaft is screwed into the nut over a very long range, the above-mentioned installation work becomes even more troublesome. Furthermore, if such headlamp kits are supplied in bulk, the management and packaging of the parts at the lamp manufacturer will be troublesome.

Therefore, it is necessary to make the attachment of such a receiver or nut to a predetermined mounting part as simple as possible, and furthermore, the adjustment mechanism is supplied integrated into the headlamp, It is desirable for vehicle manufacturers to be able to complete the assembly of the lamp by simply attaching the nut to the fixed side member in the same state.

Purpose of the invention Therefore, the present invention was devised in view of the above-mentioned problems, and it is possible to easily fit the spherical part of the adjustment shaft inside the receiver, and also to attach the receiver to the mounting bracket on which it is supported. On the other hand, it can be easily installed with the spherical part of the adjustment shaft still fitted inside the receiver, and it can be mounted on the vehicle body or the vehicle body with the tip of the adjustment shaft screwed into the nut. An object of the present invention is to provide a new optical axis adjustment mechanism for a vehicle headlamp that can be attached to a fixed side member and can be supplied to vehicle manufacturers with the adjustment mechanism incorporated in the headlamp. purpose.

Summary of the invention In order to achieve the above-mentioned purpose, the optical axis adjustment mechanism of the vehicle headlamp of the invention consists of an adjustment shaft, a receiver, a mounting bracket provided on the lamp body, and a nut provided on the vehicle body. The receiver is made of synthetic resin and has a substantially rectangular base, an annular protrusion integrally formed at the front end, a hole passing through in the axial direction, and a hole in the middle of the through hole. A substantially concave spherical support surface is formed on the portion to support a spherical portion formed at the base end of the adjustment shaft, and a mounting piece protruding in a direction perpendicular to the axial direction is integrally formed at one end; A slit extending from one end surface toward the other end surface, terminating in front of the other end surface, and reaching the through hole from the outer surface is formed at opposite positions of the through hole, and a locking piece with a tip facing the one end side is formed on the side surface of the through hole. The nut is attached to the mounting bracket with the opening edge of the mounting hole of the mounting bracket being held between the mounting piece and the locking piece, and the nut is attached to the adjustment shaft. It is characterized by having a hole into which it is screwed.

Embodiments Hereinafter, details of the optical axis adjustment mechanism of the vehicle headlamp of the present invention will be explained according to embodiments shown in the accompanying drawings.

Reference numeral 1 denotes a lamp body made of synthetic resin, which has a large opening at the front and an insertion hole (not shown) provided at the center of the rear, into which a light bulb (not shown) is attached. Reference numeral 2 denotes a lens, which has a low trapezoidal shape that projects forward, and whose rear end edge is placed in a lens installation groove 3 provided at the opening edge of the lamp body 1. In this state, the lens 2 is fixed to the opening edge of the lamp body 1 by a suitable fixing means such as a clip member. Reference numeral 4 denotes the vehicle body or a member fixed to the vehicle body, that is, a fixed side member. and,
The lamp body 1 is supported by the fixed side member 4 at three points. That is, when viewed from the front (in Figure 1)
At the upper right point a, by the rotation fulcrum mechanism, at point b, which is close to the lower end on a line extending vertically from point a, by the first interval adjustment mechanism, and at point c, on a line extending horizontally from point a. Each is supported by a second interval adjustment mechanism.

The rotation fulcrum mechanism 5 at point a is the lamp body 1
It is composed of a spherical protrusion 6 projecting from the base and a support 7 attached to the stationary member 4. 8 is a rod having a spherical protrusion 6 at one end and a threaded groove 9 at the other end, and the threaded groove 9 is screwed onto a mounting piece 10 formed on the body 1. Fixed. Reference numeral 11 denotes a spherical recess formed inside the support 7 and opened in a substantially trumped shape toward the side of the body 1 corresponding to the mounting piece 10, and the spherical protrusion 6 of the rod 8 is rotated in this spherical recess 11. They are movably fitted, and a ball joint-shaped rotation fulcrum mechanism 5 is constructed here.

The spacing adjustment mechanism 12 at point b and the spacing adjustment mechanism 13 at point c have substantially the same configuration. Therefore, only the interval adjustment mechanism 12 at point b will be explained.

The interval adjustment mechanism 12 includes a receiver 14 attached to the lamp body 1 and a nut 1 attached to the fixing member 4.
5, and an adjustment shaft 16 whose base end is supported by the receiver 14 and whose distal end is screwed into a nut. Note that the present invention is applied to the receiver 14 described above.

The adjustment shaft 16 consists of a cylindrical shaft portion 17 and a spherical head 18 formed at the base end of the shaft portion 17, and the base end of the head 18 is partially cut off in a direction perpendicular to the axial direction. A circular proximal end surface 18' is thereby formed. A threaded groove 19 is formed on the outer circumferential surface of the shaft portion 17 from the approximate center to the tip.

The receiver 14 (see Figs. 4 to 7) is made of synthetic resin, has a hole penetrating in the axial direction, and is formed in approximately two parts in the direction perpendicular to the axial direction. (For convenience of explanation, the up-down direction in Fig. 4 is the up-down direction of the receiver 14, the left-right direction is the left-right direction of the receiver 14, and the left side direction in Fig. 6 is the front side of the receiver 14, and the right side is the rear side of the receiver 14.) 20 is the receiver 14.
The base of the casing is formed in a substantially rectangular shape, and the front end of the casing has an annular protrusion 2
1 is integrally formed. A hole 22 is formed in the axial center of the receiver 14, penetrating in the axial direction. That is, 23 is a front opening formed from the front end of the base 20 to the front end of the annular projection, and the diameter of the opening gradually increases toward the tip, forming a substantially concave conical surface. 24 is a rear opening formed by hollowing out a large area in the axial center of the rear of the base 20, forming a substantially square space. 25 is a spherical recess formed between the front opening 23 and the rear opening 24, and has a support surface that is substantially concave spherical, and both front and rear end faces of the spherical recess 25 are open toward the front opening 23 and the rear opening 24, respectively. Thus, the front opening 23 and the spherical recess 25 are formed in the axial center of the receiver 14,
and a rear opening 24 are formed.

The left and right edges of the front end surface of the base 20 slightly protrude outward, and from the protruded tip edge there is a mounting piece 2 whose tip faces toward the rear side of the receiver 14.
6, 26 are formed. That is, the mounting piece 26,
26 are each protruded outward and extend gradually toward the rear of the receptor 14 as it reaches its tip, and its wall thickness is formed so that it gradually becomes thinner as it reaches its tip. ing. Thus, the mounting pieces 26, 26 can be deformed by pressing the rear side surface against the mounting surface of the mounting portion so that the tip portions are elastically displaced forward.

Reference numerals 27 and 27 denote slits formed by cutting out substantially U-shaped slits on both left and right sides of the portion of the base 20 where the rear opening 24 is formed;
A locking piece 28, 28 is attached to each inner part of 27.
is formed. The locking pieces 28, 28 are formed by cutting out the slits 27, 27 as described above, so that their base end portions are integrally connected to the rear end portions of both left and right sides of the base portion 20, Therefore,
The locking pieces 28, 28 are configured to be able to bend in a direction perpendicular to the axial direction using the portion connected to the base 20 as a fulcrum. And the locking pieces 28,2
The outer side surfaces of the base portion 20 protrude outward from both left and right side surfaces of the base portion 20 in a substantially mountain shape. That is, the locking piece 2
The outer surfaces of 8 and 28 have gentle slopes 29 and 29 that extend diagonally outward from the part connected to the base 20 toward the tip, and intermediate surfaces 30 and 30 that continue to the gentle slopes 29 and 29. Following the intermediate surfaces 30, 30,
The steep slopes 31, 31 extend diagonally inward toward the tip.
The tips of 1 and 31 and the portion in front of the tips are located inside the left and right side surfaces of the base 20.

32, 32 extend from the front end surface of the receiver 14 toward the rear end surface, and end in front of the rear end surface, and
These slits are formed to reach the through hole 22 from the center of each of the upper and lower side surfaces. Therefore, each part constituting the through hole 22, that is, the front opening 2
3. The spherical recess 25 and the rear opening 24 are divided into left and right halves by the slits 32, 32, and the receiver 14
Most of it is divided into left and right halves, except for the rear end.

Thus, the adjustment shaft 16 is inserted into the through hole 22 of the receiver 14 from the tip of its shaft portion 17, and the spherical head 1
8 is fitted into a spherical recess 25 formed in the middle of the through hole 22 of the receiver 14. At this time, adjustment axis 1
The diameter of the spherical head 18 of 6 is the same as that of the front opening 2 of the receiver 14.
Since the diameter is larger than that of the spherical recess 25 of No. 3, the receiver 14 abuts against the inclined surface of the front opening 23. Since the head 18 can be opened in the spherical recess 25 by pushing the head 18 further, the front opening 23 and the spherical recess 25 of the receiver will be opened in the left and right directions.
can be fitted inside. After the spherical head 18 of the adjustment shaft 16 is fitted into the spherical recess 25 in this manner, the receiver 16 is restored from the left and right opened state to its original state by its own restoring force. be done.

Thus, the receiver 14 is attached to the mounting bracket 33 protruding from the point a of the lamp body 1 of the headlamp, with the head side end of the adjustment shaft 16 fitted therein. Reference numeral 34 denotes a receiver mounting hole formed in the center of the mounting bracket 33, and the inner peripheral shape of the mounting hole 34 is formed to be approximately the same as the cross-sectional shape of the base 20 of the receiver 14. The depth of 34 is between the rear end surface of the mounting pieces 26, 26 of the receiver 14 and the locking piece 2.
It is formed to be approximately equal to or slightly longer than the distance between the steep slopes 31 and 31 of Nos. 8 and 28 and approximately the middle portion thereof. Therefore, if the receiver 14 is pushed into the mounting hole 34 of the bracket 33 from the rear end side,
The receiver 14 has mounting pieces 26, 26 and locking pieces 28, 28.
and are attached to the bracket 33 by being pressed against the front and rear opening peripheries of the attachment hole 34. That is, when the receiver is pushed into the mounting hole 34 as described above,
The outer peripheral surface of the base 20 is moved while substantially slidingly contacting the inner peripheral surface of the mounting hole 34, and the gentle slope 2 of the locking pieces 28, 28 is moved.
9 and 29 are pressed by the front opening edge of the mounting hole 34. Then, the locking pieces 28, 28 are bent inward using the portion connected to the base 20 at the proximal end as a fulcrum, and the base 20 is pushed into the attachment hole 34 in this state. Then, when the steep slopes 31, 31 of the locking pieces 28, 28 reach the position where they are about to come out of the mounting hole 34 rearwardly, the tip of the rear side of the mounting pieces 26, 26 touches the opening periphery of the mounting hole 34. Abutted on the outside. Therefore, if the receiver 14 is further pushed in forcefully, the mounting pieces 26, 26 will be deformed so that their tips are displaced forward, and the receiver 14 will be further pushed into the mounting hole 34, and at this point it will be engaged. The steep slopes 31, 31 of the stopper pieces 28, 28 come out from the attachment holes 34. Then, the steep slopes 31, 31 are the mounting holes 3
4, the locking pieces 28, 28 return from the inwardly bent state due to their elasticity to the original state, and as a result, the steep slopes 31, 28 of the locking pieces 28, 28,
31 is pressed against the rear opening periphery of the mounting hole 34. Thus, in the receiver 14, the mounting pieces 26, 26 are in elastic contact with the outside of the front opening periphery of the mounting hole 34, and the steep slopes 31, 31 of the locking pieces 28, 28 are in contact with the rear opening of the mounting hole 34. By being pressed against the periphery, it is prevented from coming off from the mounting hole 34, and this state of being prevented from coming off is achieved by the elastic force generated by the deformation of the mounting pieces 26, 26. Retained. In this way, the receiver 14 is attached to the mounting hole 3.
4, both left and right side surfaces of the base 20 of the receiver 14 are held by the inner surface of the attachment hole 34, so the receiver 14 is prevented from opening in the left-right direction. Therefore, since the spherical recess 25 cannot be opened in the left-right direction, the adjustment shaft 1
The head 18 of No. 6 is kept fitted into the spherical recess 25.

Next, the nut 15 will be explained (see FIGS. 8 to 11). (Also, for convenience of explanation, this is the 8th
The vertical direction in the figure is the vertical direction of the nut 15, the horizontal direction is the horizontal direction of the nut 15, the left side in FIG. 10 is the front side of the nut 15, and the right side is the rear side of the nut 15. ) The nut 15 is made of synthetic resin and includes a threaded portion into which the tip of the shaft portion 17 of the adjustment shaft 16 is threaded. That is, 35 is a threaded part formed in a substantially cylindrical shape, and a through hole 3 extending in the axial direction is provided in the axial center part.
6 is formed. Reference numerals 37 and 37 denote support pieces whose rear ends are integrally connected to the rear end portion of the threaded portion 35 and are arranged on both left and right sides of the threaded portion 35 at a slight distance from the threaded portion 35. , the threaded portion 35 is attached to a predetermined attachment portion via the support pieces 37, 37.

38 is a connecting portion that is formed to protrude outward from the outer circumferential surface of the rear end of the threaded portion 35 and has a substantially square shape when viewed from the rear (see FIG. 9); The support pieces 37, 37 are formed to extend forward from both left and right ends of the connecting portion 38. Note that 39, 39, . . . are ribs formed on both left and right sides of the threaded portion 35 to extend vertically, and the rear ends of the ribs 39, 39, . .

Attachment pieces 40, 40 projecting outward are integrally formed at the distal ends of the support pieces 37, 37. In addition, bent portions 41, 41 that project inward are formed at the tips of the supporting pieces 37, 37, and the distance between the opposing end surfaces 42, 42 of the bent portions 41, 41 is The diameter of the through hole 36 of the threaded portion 35 is made smaller. A semi-annular protrusion 43, 43 centered on the axis of the threaded portion 35 is formed on the tip end surface of each support piece 37, 37. 44, 44 are arcuate notches formed in the opposing surfaces 42, 42 of the bent portions 41, 41;
The arcuate surface is formed concentrically with the through hole 36 of the threaded portion 35 and has the same diameter. And notches 44, 4
Semi-conical openings 45, 45 whose diameters gradually increase toward the front ends are formed from the front end edges of 4 to the front ends of the semi-annular protrusions 43, 43.

Reference numerals 46, 46 are elastic pieces projecting outward from the outer peripheral edges of the mounting pieces 40, 40 and the bent parts 41, 41, and the elastic pieces 46, 46 are connected to the support pieces 37, 46 toward the tips thereof. It extends diagonally toward the rear of the 37.

Further, locking protrusions 47, 47 are formed on the outer surfaces of the support pieces 37, 37, and the distal end surfaces thereof are arranged slightly apart from the rear surfaces of the mounting pieces 40, 40. That is, the outer surfaces of the support pieces 37, 37 are connected to the connecting portion 38.
A groove is formed between the mounting pieces 40, 40 and a position slightly spaced apart from the rear surface of the mounting pieces 40, 40, and extends obliquely so as to gradually move away from the threaded portion 35 as you go to the tip. Engagement surfaces 48, 48 are formed opposite to the rear surfaces of 40, 40 with a slight distance therebetween.

Therefore, the through hole 3 of the threaded part 35 of the nut 15
6, the tip of the shaft portion 17 of the adjustment shaft 16 described above, that is, the portion in which the threaded groove 19 is formed, is screwed together. That is, the tip of the adjustment shaft 16 passes from the semi-conical openings 45, 45 formed on the tip side of the nut 15, through the circular space formed by the notches 44, 44, to the bent portion 41. , 41, and the threaded part 35
is press-fitted into the front end of the through hole 36 of. By the way, the nut 15 in this embodiment is a so-called self-tap type nut in which a threaded groove is not formed on the inner circumferential surface of the through hole 36 of the threaded portion 35. Therefore,
Once the tip of the adjustment shaft 16 is press-fitted into the front end of the through hole 36, use a tool such as a screwdriver to rotate the adjustment shaft 16 in the screwing direction. It is screwed toward the rear of the through hole 36 while forming a threaded groove on the inner circumferential surface of the through hole 36 . Then, the screw groove 1 of the adjustment shaft 16
When the tip of the portion where 9 is formed protrudes outward from the rear opening of the through hole 36, a spiral groove is formed on the entire inner circumferential surface of the through hole 36 in the axial direction, and The tip of the adjustment shaft 16 is screwed into the entire inner peripheral surface of the through hole 36 (see FIGS. 12 and 13).

The nut 15 is attached to the nut attachment hole 49 formed in the stationary side member 4 described above, and there are at least two possible states for attaching the nut. That is, 1
In one state, as described above, the tip of the adjustment shaft 16 is screwed into the nut 15 in advance, and in the other state, the adjustment shaft 16 is not screwed.

First, the nut 1 with the adjustment shaft 16 screwed together.
The installation of item 5 will be explained. This installation is
This is suitable when the nut attachment hole 49 is formed with a certain degree of flexibility at the opening periphery, and the opening edge of the attachment hole 49 in the embodiment shown in the drawings is provided with flexibility. That is, 50, 50,...
(See Fig. 3) are notches formed in the shape of notches at each corner of the opening edge of the nut mounting hole 49, and between each adjacent notch 50, 50 is a notch that extends rearward from the opening periphery. Guide pieces 51, 51, . . . formed by bending in a rectangular shape are arranged. Therefore, the opening periphery of the nut mounting hole 49 and the guide piece 5
1, 51, . . . have notches 50, 50, . . . on the corners.
By forming the opening, it is possible to bend the opening so as to make it slightly larger. Therefore,
As described above, if the nut 15 is inserted and pushed into the mounting hole 49 with the tip of the adjustment shaft 16 threaded, the nut 15 can be easily and securely installed into the mounting hole 49. It will be worn. That is, if the nut 15 is inserted into the mounting piece 49 from its rear side, the portion of the outer surface of the support pieces 37, 37 that approaches the locking portions 47, 47 will close to the area where the rear side protrudes rearward from the mounting hole 49. are abutted against both left and right sides of the opening periphery of the mounting hole 49. Therefore, if the nut 15 is pushed in further, the left and right sides of the opening periphery of the mounting hole 49 will be pressed by the outer surfaces of the locking protrusions 47, 47 of the support pieces 37, 37, and the diameter will be slightly reduced. It is bent to make it bigger. In addition, due to the existence of the space between the supporting pieces 37, 37 and the threaded portion 35, the supporting pieces 3
7 and 37 are intermediate parts thereof, that is, locking parts 47 and 47
can be bent inward, that is, toward the threaded portion 35, and thereby the locking protrusions 47, 4
7 can pass through the opening periphery of the attachment hole 49, so the nut 15 can be further pushed into the attachment hole 49. The locking protrusions 47, 47 that have passed through the opening periphery of the mounting hole 49 move while their outer surfaces are in elastic contact with the guide pieces 51, 51. Then, the outer surface of the locking protrusions 47, 47 is connected to the guide piece 5.
1 and 51, the tips of the elastic pieces 46, 46 of the attachment pieces 40, 40 come into contact with the opening periphery of the attachment hole 49. When the nut 15 is pushed in further, the elastic pieces 46, 46 are deformed so that their tips are moved forward, and the rear surfaces of the attachment pieces 41, 41 are pressed against the opening periphery of the attachment hole 49, and , the engagement surface 4 of the locking protrusions 47, 47
8 and 48 are engaged with the tips of the left and right guide pieces 51 and 51 in a pressed state. That is, the locking protrusion 4
The outer surfaces of 7 and 47 are provided with guide pieces 51 and 51 on both the left and right sides.
When the guide pieces 51, 51 come out of contact with the guide pieces 51, 51
returns to the original state from the bent state as described above, and the support pieces 37, 37 also return to their original states from the inwardly bent state at their central portions, so that the tips of the guide pieces 51, 51 are positioned so as to face the engagement surfaces 48, 48 of the locking protrusions 47, 47. Thus, the rear surfaces of the mounting pieces 41 and 41 of the nut 15 abut against the opening periphery of the mounting hole 49, and the locking protrusions 47 and 4
The engaging surfaces 48, 48 of 7 are engaged with the tips of the guide pieces 51, 51 to prevent them from coming off from the mounting hole 49, and this state is maintained when the elastic pieces 46, 46
held by the elasticity of

In this way, the nut 15 can be attached to a predetermined nut attachment hole 49 while the tip of the adjustment shaft 16 remains screwed together.

Next, the installation of the nut 15 without screwing the adjustment shaft 16 will be explained. This type of attachment is suitable when the nut attachment hole is formed to have flexibility at the opening periphery thereof. Although the nut mounting hole in this case is not shown, the shape of the opening periphery is a concave line between the locking protrusions 47, 47 of the support pieces 37, 37 of the nut 15 and the mounting sides 40, 40. The cross-sectional shape is approximately the same as that of the cross-sectional shape. Therefore, if the nut 15 is inserted into the mounting hole from the rear side, the outer surfaces of the support pieces 37, 37 will lock when the part from the approximate middle part to the rear end of the nut 15 comes to the point where it is inserted into the mounting hole. protrusion 47,
47 is in contact with the front opening periphery of the mounting hole. When the nut 15 is further pushed in from this state, the outer surfaces of the support pieces 37, 37 are pressed inward by the front opening periphery of the mounting hole. bend towards. That is, the supporting pieces 37, 37 are arranged apart from the threaded part 35, and the bent parts 41,
Since the opposing surfaces 42 and 42 of 41 are also arranged apart from each other, the supporting pieces 37 and 37
1 and 41 can be bent inward toward each other while bringing the opposing surfaces closer to each other. By bending the support pieces 37, 37 inward in this manner, the locking protrusions 47, 47 are mutually displaced inwardly, and the nut 15 can be further pushed into the mounting hole. And the locking protrusion 47,
When the outer surface of 47 comes out of the mounting hole, the support piece 37,
Since the pressure on 37 from the outside is released,
The support pieces 37, 37 return to their original state from the state in which they were bent inward toward each other as described above. As a result, the engaging surfaces 48, 4 of the locking protrusions 47, 47
8 is engaged with the rear opening edge of the mounting hole, and
The rear surfaces of the attachment pieces 41, 41 are brought into contact with the front openings of the attachment holes, and in this state, the elastic contact pieces 46, 46 are deformed so that their tips are displaced forward. Thus, the nut 15 has the mounting pieces 41, 41, the locking protrusion 47,
47 prevents it from coming off from the mounting hole,
This state is maintained by the elastic force of the elastic contact pieces 46, 46. The tip of the adjustment shaft 16 is screwed into the threaded portion 36 of the nut 15 mounted in this way, as described above. Thus, the adjustment of the headlight irradiation direction by the optical axis adjustment mechanism 12 is performed as follows. That is, if the adjusting shaft 16 is rotated in the screwing direction at point b, the receiving body 14 is moved toward the nut 15 by the head 18 of the adjusting shaft 16, so that the distance between the receiving body 14 and the nut 15 is reduced. distance is shortened. Therefore,
Since the headlight is rotated downward about the line connecting point a and point c, the irradiation direction is thereby changed downward. Moreover, if the adjustment shaft 16 is rotated in the untwisting direction, the receiver 14 is moved toward the side opposite to the nut 15, so that the distance between the receiver 14 and the nut 15 is increased. Therefore, the headlight is rotated upward about the above-mentioned line, thereby changing the irradiation direction upward. As described above, since the optical axis adjustment mechanism 13 at point c is configured similarly to the optical axis adjustment mechanism 12 at point b, the adjustment shaft of the optical axis adjustment mechanism 13 is rotated in the screwing direction or in the screwing direction. By rotating in the same return direction, the headlights can be rotated left and right around the line connecting points a and b, and by doing so, the headlights can be turned to the right or to the right. Effects of the device that can be changed to the left direction As is clear from the above description, the optical axis adjustment mechanism of the vehicle headlight of the present invention has an adjustment shaft,
It consists of a receiver, a mounting bracket provided on the lamp body, and a nut provided on the vehicle body.The receiver is made of synthetic resin and has a substantially rectangular base and an annular protrusion integrally formed at the front end. A substantially concave spherical support surface is formed in the middle part of the through hole to support a spherical part formed at the base end of the adjustment shaft, A mounting piece is integrally formed at one end and protrudes in a direction perpendicular to the axial direction, extends from one end face to the other end face, ends in front of the other end face, and connects a slit in the through hole that reaches the through hole from the outer surface. The locking pieces are formed at opposing positions and have their tips facing one end side, and are formed to protrude outward from the side surface, and the opening of the mounting hole of the mounting bracket is formed between the mounting piece and the locking piece. The nut is attached to a mounting bracket with its edges sandwiched, and the nut has a hole into which the adjustment shaft is screwed.

Therefore, since the receiver can be heard in the direction perpendicular to the axial direction by the slit formed by reaching the through hole, the adjustment shaft is attached to the concave spherical support surface formed in the middle of the through hole. The spherical part can be easily fitted. Then, the receiver can be attached by the attachment piece and the locking piece by simply pushing it into the attachment bracket of the lamp body to which it is attached.

In the above-mentioned embodiment, the locking piece was formed on the side surface of the part of the receiver that did not correspond to the part on which the concave spherical support surface was formed. It can be attached to the attachment hole with the spherical body still fitted inside.

In addition, since it can be attached to the vehicle body or a fixed side member formed on the vehicle body with the tip of the adjustment shaft screwed into the nut, the headlight can be supplied to vehicle manufacturers with the adjustment mechanism already installed. be able to.

[Brief explanation of the drawing]

The drawings show an example of the implementation of the optical axis adjustment mechanism of the vehicle headlamp of the present invention, and FIG. 1 is a front view of the headlamp, and FIG.
The figure is a sectional view taken along line A-A in Figure 1, Figure 3 is an exploded perspective view of the optical axis adjustment mechanism, Figure 4 is a front view of the receiver, and Figure 5 is a rear view of the receiver. , Figure 6 is the fourth
A cross-sectional view taken along line B-B in the figure, Figure 7 is C in Figure 4.
- A cross-sectional view along line C, Figure 8 is a front view of the nut,
Figure 9 is a back view of the nut, Figure 10 is D of Figure 8.
-A cross-sectional view taken along line D, Figure 11 is E-E in Figure 8.
12 is a sectional view taken along line FF in FIG. 2, and FIG. 13 is a sectional view taken along line A-F in FIG. 1.
FIG. 3 is a cross-sectional view taken along line A. Explanation of symbols, 1... Lamp body, 12, 13
... Optical axis adjustment mechanism, 14 ... Receptor, 15 ... Nut, 16 ... Adjustment shaft, 18 ... Spherical part, 20 ...
Base, 21...Annular protrusion, 22...Through hole, 25
... Concave spherical support surface, 26 ... Mounting piece, 28 ...
...Locking piece, 32...Slit, 33...Mounting bracket, 34...Mounting hole, 36...Hole.

Claims (1)

[Scope of utility model registration request] It consists of an adjustment shaft, a receiver, a mounting bracket provided on the lamp body, and a nut provided on the vehicle body.The receiver is made of synthetic resin and has a substantially rectangular base and an annular projection at the front end. The part is integrally formed and has a hole penetrating in the axial direction,
A substantially concave spherical support surface for supporting a spherical part formed at the base end of the adjustment shaft is formed in the middle part of the through hole, and a mounting piece protrudes at one end in a direction perpendicular to the axial direction. A slit is integrally formed, extends from one end surface toward the other end surface, terminates in front of the other end surface, and reaches the through hole from the outer surface at a position opposite to the through hole, and has a tip facing toward the one end side. A locking piece is formed to protrude outward from the side surface and is attached to the mounting bracket with the opening edge of the mounting hole of the mounting bracket being sandwiched between the mounting piece and the locking piece, An optical axis adjustment mechanism for a vehicle headlamp, wherein the nut has a hole into which the adjustment shaft is screwed.