JPH037222Y2 - - 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, it relates to an optical axis adjustment mechanism for a vehicle headlamp, which consists of an adjustment shaft, a receiver, a mounting bracket provided on the lamp body, and a nut, and can be easily attached to a predetermined mounting part in one operation. This is a new product that allows the adjustment shaft to be adjusted while ensuring that the attached state is maintained, and that the tip of the adjustment shaft is screwed into the nut. It is an object of the present invention to provide an optical axis adjustment mechanism for a vehicle headlamp.

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 screw-in direction or screw-unscrew 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.

Incidentally, such a headlamp is generally manufactured by a lamp manufacturer, and the vehicle manufacturer attaches it to the vehicle body. That is, each part of the headlamp and adjustment mechanism described above is supplied as a set 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 have to install the receiver on the headlight,
All installation work must be carried out, such as attaching the nut to the stationary member and attaching the adjustment shaft that connects the receiver and the nut. 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 a headlamp set is supplied separately, 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 attach it to a predetermined attachment part with a single action, and to ensure that the attached state is maintained. So,
Moreover, it is an object of the present invention to provide a novel optical axis adjustment mechanism for a vehicle headlamp, which can be attached to the mounting part with the tip of the adjustment shaft screwed into the nut. .

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. The adjustment shaft has a spherical part formed at its base end supported by a spherical recess formed in the receiver, and a tip end screwed into the nut, and the receiver is made of synthetic resin, with one end It is attached to the mounting bracket with the opening edge of the mounting hole of the mounting bracket being sandwiched between the mounting piece that protrudes to the side and the locking piece that is flexible in the direction orthogonal to the axial direction of the adjustment shaft. The nut is made of synthetic resin, has a threaded part formed in a substantially cylindrical shape having a hole into which the adjustment shaft is threaded, and a base end connected to the threaded part, and has a threaded part other than the base end. two support pieces which are arranged on opposite sides of the threaded part and with a slit interposed between them and the threaded part so as to be able to bend inward; a mounting piece protruding outward from the tip of the support piece; and a locking protrusion on the outer surface of the support piece, the tip surface of which is arranged at a slight distance from the rear surface of the attachment piece. It is characterized by being formed.

Embodiments Hereinafter, details of the optical axis adjustment mechanism of the vehicle headlamp of the present invention will be described 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. Numeral 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 a receiver 14 and whose distal end is screwed into a nut 15.

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 passing through it in the axial direction, and is formed approximately in half in a 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 direction in FIG. 6 is the front side of the receiver 14. Similarly, the right direction is the rear side of the receiver 14.) 20 is the receiver 14
is formed into a substantially rectangular shape at the base, and has an annular cavity 2 at the front end.
1 is integrally formed. A hole 22 is formed in the axial center of the receiver 14 and penetrates 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, the diameter of which gradually increases as it reaches the tip, and is formed into a substantially concave conical shape. ing. Reference numeral 24 denotes a rear opening portion formed by largely hollowing out the rear axis of the base portion 20, and is a substantially rectangular space. 25 is a spherical recess formed between the front opening 23 and the rear opening 24 and having a substantially concave spherical support surface, and both front and rear end surfaces of the spherical recess 25 are connected to the front opening 23 and the rear They are each opened toward the opening 24. Thus, the axial center of the receiver 14 has a front opening 23 and a spherical recess 25.
A through hole 22 is formed from each portion of the rear opening 24 and the rear opening 24 .

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. Continuing to 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 to the rear end surface of the receiver 14, 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. Supports 37, 37 have rear ends integrally connected to the rear end of the threaded part 35, and are disposed on both left and right sides of the threaded part 35 through slits between the threaded part 35 and the threaded part 35. It is a piece, and the threaded part 3
5 is a support piece 37, 3 attached to a predetermined mounting portion.
It is attached via 7.

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 side surfaces of the threaded portion 35 to extend vertically, and the rear ends of the ribs 39, 39, . There is.

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 so as to approach 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 screwed 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 peripheral 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 screw 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).

Finally, the attachment of the nut 15 to the attachment hole 49 with the adjustment shaft 16 screwed into the nut 15 will be described. This attachment is suitable when the nut attachment hole 49 is formed with a certain degree of flexibility at the opening periphery, and in the embodiment shown in the drawings, the opening edge of the attachment hole 49 is provided with flexibility. ing. That is, 50, 50, . . . (see FIG. 3) are notches formed in each corner of the opening edge of the nut mounting hole 49, and each adjacent notch 5
Between 0 and 50, there are guide pieces 51, 51, .
...is placed. However, the nut mounting hole 4
By forming notches 50, 50, . . . on the corner portions of the opening periphery and the guide pieces 51, 51, . . . 9, the opening periphery and the guide pieces 51, 51, . 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 inserted into the mounting hole 49. is attached to. That is, if the nut 15 is inserted into the mounting hole 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. Also, along with this,
Due to the existence of the space (slit) between the supporting pieces 37, 37 and the threaded portion 35, the intermediate portions of the supporting pieces 37, 37, that is, around the locking portions 47, 47, move inward, that is, , can be bent toward the threaded portion 35, thereby causing the locking protrusions 47, 47 to fit into the mounting hole 4.
9, the nut 15 can be further pushed into the mounting hole 49. The locking protrusions 47, 47 that have passed through the opening periphery of the mounting hole 49 have their outer surfaces connected to the guide piece 51,
51 while moving. Then, before the outer surfaces of the locking protrusions 47, 47 come out of contact with the guide pieces 51, 51, the tips of the elastic pieces 46, 46 of the mounting pieces 40, 40 come into contact with the opening periphery of the mounting hole 49. be touched. Then, when the nut 15 is pushed in further, the elastic pieces 46, 46 are deformed so that their tips are displaced forward, and the attachment pieces 41, 41 are deformed.
The rear surface is pressed against the opening periphery of the mounting hole 49, and the engaging surfaces 48, 48 of the locking protrusions 47, 47 are engaged with the tips of the left and right guide pieces 51, 51 under pressure. . That is, when the outer surfaces of the locking protrusions 47, 47 come out of contact with the left and right guide pieces 51, 51, the guide pieces 51, 51 return to their original state from the deflected state described above. At the same time as the supporting pieces 37, 37 return to the original state from the inwardly bent state, the tips of the guide pieces 51, 51 touch the engaging surfaces 48 of the locking protrusions 47, 47. , 48. However, Natsu 1
5, the rear surfaces of the mounting pieces 41, 41 are brought into contact with the opening periphery of the mounting hole 49, and the engagement surfaces 4 of the locking protrusions 47, 47
8 and 48 are engaged with the tips of the guide pieces 51 and 51 to prevent them from coming off from the mounting hole 49,
This state is maintained by the elasticity of the elastic pieces 46, 46.

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.

Therefore, the optical axis adjustment mechanism 1 made in this way
Adjustment of the headlamp irradiation direction according to No. 2 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, the headlight is rotated downward about the line connecting point a and point c, thereby changing the irradiation direction 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 mentioned 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 can be rotated in the screwing direction or in the screwing direction. By rotating in the same return direction, the headlight can be rotated left and right around the line connecting points a and b, and by doing so, the headlight direction can be changed to the right or to the right. It can be changed to the left.

Effects of the invention As is clear from the above description, the optical axis adjustment mechanism of the vehicle headlight of the invention has an adjustment shaft,
It consists of a receiver, a mounting bracket provided on the lamp body, and a nut. The receiver is screwed onto the nut, and the receiver is made of synthetic resin, and between a mounting piece projecting laterally from one end of the receiver and a locking piece having flexibility in a direction perpendicular to the axial direction of the adjustment shaft. It is attached to the mounting bracket while holding the opening edge of the mounting hole in the mounting bracket.
The nut is made of synthetic resin, and has a threaded part formed in a substantially cylindrical shape and has a hole into which the adjustment shaft is threaded;
The proximal end is connected to the threaded part, and the parts other than the proximal end are arranged on opposite sides of the threaded part with a slit interposed between them and the threaded part, facing inward. It consists of two support pieces that can be bent by bending, and a mounting piece that protrudes outward from the tip of the support piece, and the tip surface of the support piece is attached to the outer surface of the support piece. It is characterized in that a locking protrusion is formed slightly spaced apart from the rear surface of the piece.

Therefore, the support pieces that support the threaded part into which the adjustment shaft is threaded and are attached to the mounting part are bent inward from each other due to the presence of the slit provided between them and the threaded part. Therefore, even when the adjustment shaft remains screwed together, the shape of the nut can be reduced during installation, and the nut can be easily passed through the installation hole. After passing through the mounting hole, the support piece returns to its original state from the inwardly bent state, so the nut is securely attached to the mounting hole by the mounting piece and the locking protrusion. . in this way,
Since the adjustment shaft can be attached to the mounting portion while the adjustment shaft remains screwed to the nut, the adjustment shaft can be easily attached to the predetermined mounting portion in one operation. In addition, once installed, the receiver supporting the adjustment shaft screwed into the nut by a certain amount will not fall off from the mounting bracket, and there is no worry that the parts will come apart, making assembly work and parts management easier. Not only will this become easier, but it will also be possible for lamp manufacturers to reliably incorporate the optical axis adjustment mechanism into vehicle headlamps and supply them to vehicle manufacturers. Furthermore, since the adjustment shaft is attached to the attachment part by being inserted through holes formed in the receiver, the attachment bracket, and the nut, it can be attached to any part of the member to be attached.

[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 the line A-A in Figure 2, Figure 3 is an exploded perspective view showing the optical axis adjustment mechanism, Figure 4 is a front view of the receiver, and Figure 5 is the back of the receiver. Figure 6 is a sectional view taken along line B-B in Figure 4, Figure 7 is a sectional view taken along line C-C in Figure 4, Figure 8 is a front view of the nut, and Figure 9 is a sectional view taken along line C-C in Figure 4. 10 is a sectional view taken along line D-D in FIG. 8, and FIG. 11 is a sectional view taken along line E in FIG.
-A cross-sectional view along line E, Figure 12 is F-F in Figure 2.
FIG. 13 is a cross-sectional view of the adjustment mechanism taken along line A--A in FIG. 1. Explanation of symbols, 1... Lamp body, 12, 13
... Optical axis adjustment mechanism, 14 ... Receptacle, 15 ... Nut, 16 ... Adjustment shaft, 18 ... Spherical part (of adjustment shaft), 19 ... Tip part (of adjustment shaft), 25 ... Spherical Recessed portion, 26... Mounting piece (of the receiver), 28... Locking piece (of the receiver), 33... Mounting bracket, 34...
...Mounting hole, 35...Threaded part, 36...Hole, 37...
...Support piece, 40...Mounting piece (for nut), 47...
...Latching protrusion.

Claims (1)

[Claims for Utility Model Registration] Consisting of an adjustment shaft 16, a receiver 14, a mounting bracket 33 provided on the lamp body 1, and a nut 15, the adjustment shaft 16 has a spherical portion formed at its base end. 1
8 is supported in a spherical recess 25 formed in the receiver 14, and a tip 19 is screwed into the nut 15. A locking piece 2 having flexibility in a direction perpendicular to the axial direction of the mounting piece 26 and the adjustment shaft 16
The nut 15 is made of synthetic resin and has a hole 36 into which the adjustment shaft 16 is screwed. The screwing part 35 is formed into a substantially cylindrical shape, and the base end is connected to the screwing part 35, and the parts other than the base end are opposite to each other with the screwing part 35 in between. Two support pieces 37 are disposed through a slit between the joint part 35 and can be bent inward, and the tips of the support pieces 37 are provided to protrude outward. The vehicle is characterized in that a locking protrusion 47 is formed on the outer surface of the support piece 37, the tip end surface of which is arranged at a slight distance from the rear surface of the attachment piece 40. Optical axis adjustment mechanism for headlights.