CN216644077U - Screw for adjusting optical axis - Google Patents
Screw for adjusting optical axis Download PDFInfo
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- CN216644077U CN216644077U CN202121906622.2U CN202121906622U CN216644077U CN 216644077 U CN216644077 U CN 216644077U CN 202121906622 U CN202121906622 U CN 202121906622U CN 216644077 U CN216644077 U CN 216644077U
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- optical axis
- operated
- shaft portion
- screw
- lamp housing
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Abstract
The utility model relates to a screw for adjusting an optical axis, which can improve the strength of a gear part without causing high manufacturing cost. The screw for optical axis adjustment adjusts the irradiation direction of light emitted from a light source of a lamp unit disposed inside a lamp housing composed of a lamp housing and a cover, and comprises: a shaft portion having a threaded portion to be screwed with a nut provided to the lamp unit and a supported shaft portion rotatably supported by the lamp housing; and an operated portion that is continuous with one end of the shaft portion in the axial direction and has a diameter larger than that of the shaft portion, the shaft portion and the operated portion being integrally formed of a resin material, a gear portion being formed on one surface side in the axial direction at the operated portion, the gear portion being formed of a plurality of convex portions and a plurality of concave portions that are alternately continuous in the circumferential direction, the convex portions and the concave portions being set to have a size in the radial direction larger than a size in the circumferential direction.
Description
Technical Field
The present invention relates to a screw for adjusting an optical axis, which adjusts an irradiation direction of light emitted from a light source of a lamp unit.
Background
Among vehicle headlamps, for example, there is a vehicle headlamp in which a lamp unit having a light source inside a lamp housing composed of a cover and a lamp housing is disposed.
Among such vehicle headlamps provided with a lamp unit, there are vehicle headlamps in which an optical axis adjustment mechanism, that is, an optical axis adjustment (light-focusing adjustment) for adjusting the irradiation direction of light emitted from a light source, is provided by the optical axis adjustment mechanism having at least one of an optical axis adjustment screw and a pivot member (see, for example, patent document 1 and patent document 2).
The optical axis adjusting screw includes a shaft portion having a screw portion, a supported shaft portion, and an elastic engaging portion, extending in the front-rear direction, and an operated portion having a gear portion continuous with the rear end of the shaft portion, the screw portion being screwed to a nut provided in the lamp unit, the supported shaft portion being rotatably supported by the lamp housing, the elastic engaging portion being engaged with a part of the lamp housing, and the operated portion being located on the rear side of the lamp housing. The optical axis adjusting screw has a gear portion formed of a plurality of convex portions and a plurality of concave portions alternately continuous in a circumferential direction, and is formed of a metal material or a resin material. The pivot member is coupled to the lamp unit and the lamp housing at front and rear ends thereof, respectively, and is formed to be rotatable in an arbitrary direction with respect to the lamp housing.
The optical axis adjusting screw is rotated in the axial direction by a tool such as a screwdriver in a state in which the elastic engagement portion is engaged with a part of the lamp housing and the movement in the axial direction is restricted with respect to the lamp housing. The rotation of the optical axis adjusting screw in the axial direction is performed by inserting a tool such as a screwdriver into the concave portion of the gear portion from the upper side outside the lamp housing, for example, and engaging the tool with the convex portion to rotate the tool to operate the gear portion.
When the gear portion is operated to rotate the optical axis adjusting screw in the axial direction, the nut screwed with the screw portion is moved in the front-rear direction in accordance with the rotation direction of the optical axis adjusting screw, the lamp unit tilts with respect to the lamp housing about the pivot member as a fulcrum, and the irradiation direction of the light emitted from the light source is adjusted.
Documents of the prior art
Patent document
Patent document 1: japanese patent laid-open publication No. 2017-139140
Patent document 2: japanese patent laid-open No. 2008-243604
SUMMERY OF THE UTILITY MODEL
Problem to be solved by the utility model
However, as described above, the gear portion of the optical axis adjusting screw is formed of a metal material or a resin material, and a tool such as a screwdriver is engaged with the gear portion formed of a metal material or a resin material when the optical axis is adjusted.
The metal material has higher strength than the resin material, but is easily formed to be thin, and therefore, when the tip end portion of the tool erroneously contacts the convex portion when the tool is engaged with the gear portion from above, the convex portion may be deformed. Further, although the shaft portion is often formed of a resin material, when the shaft portion is configured such that the operated portion including the gear portion is formed of a metal material, it is necessary to form a screw for optical axis adjustment by insert molding or the like, which may increase manufacturing cost.
On the other hand, although the manufacturing cost can be reduced when the operated portion is formed of a resin material, since the strength is likely to be lower than when it is formed of a metal material, there is a risk of chipping or breakage when the tool is engaged with the gear portion from above and operated.
Therefore, an object of the optical axis adjusting screw according to the present invention is to improve the strength of the gear portion without increasing the manufacturing cost.
Means for solving the problems
A screw for optical axis adjustment according to a first aspect of the present invention adjusts an irradiation direction of light emitted from a light source of a lamp unit disposed inside a lamp housing including a lamp housing and a cover, the screw for optical axis adjustment including: a shaft portion having a threaded portion to be screwed with a nut provided to the lamp unit and a supported shaft portion rotatably supported by the lamp housing; and an operated portion that is continuous with one end of the shaft portion in the axial direction and has a larger diameter than the shaft portion, the shaft portion and the operated portion being integrally formed of a resin material, a gear portion being formed on one surface side in the axial direction at the operated portion, the gear portion being formed of a plurality of convex portions and a plurality of concave portions that are alternately continuous in the circumferential direction, the convex portions and the concave portions being set to have a larger size in the radial direction than in the circumferential direction.
Thereby, the operated portion having the gear portion is formed integrally with the shaft portion by the resin material, and the convex portion and the concave portion are formed in a shape extending in the radial direction with a dimension in the radial direction larger than a dimension in the circumferential direction.
Second, in the optical axis adjusting screw according to the present invention, it is preferable that a projection for operation is provided on the other surface side in the axial direction of the operated portion, and a recessed portion that is open on a side from which the projection for operation protrudes is formed around the projection for operation in the operated portion.
This increases the amount of protrusion of the operated projection, and increases the engagement area of the tool with the operated projection.
Third, in the screw for optical axis adjustment according to the present invention, at least the operated portion is preferably formed of a resin material containing cellulose nanofibers.
This improves the strength of the manipulated part by the cellulose nanofibers.
Fourth, in the screw for adjusting an optical axis according to the present invention, it is preferable that the shaft portion is provided with an elastic engaging portion which engages with a part of the lamp housing to restrict movement of the shaft portion in an axial direction with respect to the lamp housing, and the shaft portion is formed of a resin material containing no cellulose nanofibers.
Thus, the strength of the manipulated part is improved by including the cellulose nanofibers in the manipulated part, and the elastic engagement part is easily elastically deformed by not including the cellulose nanofibers in the shaft part.
Fifth, in the optical axis adjusting screw according to the present invention, it is preferable that the gear portion is formed in a shape in which an outer diameter thereof increases as approaching the one surface in the axial direction.
This enables the optical axis adjustment work to be performed with the tool separated from the lamp housing.
Effect of utility model
According to the present invention, since the operated portion having the gear portion is formed integrally with the shaft portion by the resin material, and the convex portion and the concave portion are formed in the shape extending in the radial direction with the dimension in the radial direction larger than the dimension in the circumferential direction, it is possible to achieve an improvement in the strength of the gear portion without causing an increase in the manufacturing cost.
Drawings
Fig. 1 is a view showing an embodiment of an optical axis adjusting screw according to the present invention together with fig. 2 to 5, and this view is a longitudinal sectional view showing an example of a vehicle headlamp using the optical axis adjusting screw.
Fig. 2 is a side view of the optical axis adjusting screw.
Fig. 3 is a perspective view of the optical axis adjusting screw.
Fig. 4 is a perspective view of the optical axis adjusting screw shown in a state viewed from a direction different from that of fig. 3.
Fig. 5 is a side view partially in section showing a state where the operated portion is operated by the tool.
Description of the reference numerals
1a vehicle headlamp; 2, a lamp shell; 3, covering; 4, a lamp shell; 10 light source; 14a nut; 16 optical axis adjusting screw; 17 a shaft portion; 18 operated part; 19 a threaded portion; 20 an intermediate portion; 21 an elastic clamping part; 22a supported shaft portion; a 24a concave portion; a 25 gear portion; 25a convex part; 25b a recess; 26 is operated by the operation protrusion.
Detailed Description
Hereinafter, a mode of an optical axis adjusting screw for implementing the present invention will be described with reference to the drawings.
First, a schematic structure of a vehicle headlamp using an optical axis adjusting screw will be described (see fig. 1).
The vehicle headlamps 1 are mounted and arranged on both left and right end portions of a front end portion of the vehicle body.
The vehicle headlamp 1 includes a lamp housing 2 having a recess that opens forward, and a cover 3 that closes the opening of the lamp housing 2. The lamp housing 2 and the cover 3 constitute a lamp housing 4, and an internal space of the lamp housing 4 is formed as a lamp chamber 4 a. An extension 5 is disposed at the front end of the lamp chamber 4 a. A part of the structure disposed in the lamp chamber 4a is shielded from the front by the extension 5.
Screw support holes 2a and 2a (only the upper screw support hole is shown in fig. 1) penetrating in the front-rear direction are formed in the rear end portion of the lamp housing 2 so as to be vertically separated. Guide wall portions 6, 6 (only one guide wall portion is shown in fig. 1) projecting rearward are provided near the screw support hole 2a at the rear end portion of the lamp housing 2. The guide wall portion 6 has a pair of inclined portions 6a, 6a provided laterally separately, and the inclined portions 6a, 6a are inclined so as to be closer to each other as going downward.
A pivot joint 7 is provided at the lower end of the lamp housing 2. The pivot coupling portion 7 is formed in a shape extending in the front-rear direction and opening forward, and has a spherical support portion 7a at a position near the front end.
A lamp unit 8 is disposed in the lamp chamber 4 a. The lamp unit 8 includes a reflector 9 having a shape opening forward and a light source 10 disposed on the rear end side of the reflector 9, and is supported by the lamp housing 2 to be tiltable by an optical axis adjustment mechanism 11. Further, the lamp unit 8 may be a projection type having a projection lens or the like.
The reflector 9 is disposed on the rear side of the extension 5 with the front end portion thereof located near the extension 5. The reflector 9 is provided with nut coupling portions 12 and 12 (only one nut coupling portion is shown in fig. 1) which are provided vertically separately, and a pivot coupling portion 13 which is located on the lower end side. The nut coupling portion 12 is formed with a coupling hole 12a penetrating in the front-rear direction. The pivot coupling portion 13 is located directly below one of the nut coupling portions 12.
The optical axis adjusting mechanism 11 is composed of a pivot member 15 and two optical axis adjusting screws 16, 16.
The pivot member 15 has a shaft portion 15a, a coupling portion 15b provided at a front end portion of the shaft portion 15a, and a spherical portion 15c provided at a rear end portion of the shaft portion 15 a. In the pivot member 15, the connection portion 15b is connected to the pivot connection portion 13 of the reflector 9, and the spherical portion 15c is rotatably supported by the spherical support portion 7a of the pivot connection portion 7 in the lamp housing 2.
The optical axis adjusting screw 16 includes a shaft portion 17 formed in a shaft shape extending in the front-rear direction and an operated portion 18 continuous with the rear end of the shaft portion 17, and the shaft portion 17 and the operated portion 18 are formed integrally of a resin material (see fig. 2 to 4).
The shaft portion 17 is provided with a threaded portion 19, an intermediate portion 20, an elastic engagement portion 21, and a supported shaft portion 22 in this order from the front side.
The elastic engagement portion 21 is formed in a shape that increases in diameter as it separates from the intermediate portion 20 in the axial direction. The groove portions 23, … … that open in the radial direction are formed at equal intervals in the circumferential direction from the intermediate portion 20 to the elastic engagement portion 21. The rear surface of the elastic engaging portion 21 is formed as a regulated surface 21 a.
In the supported shaft portion 22, a supported groove 22a extending in the circumferential direction is formed at an end portion on the elastic engagement portion 21 side, a ring mounting groove 22b is continuously formed on the rear side of the supported groove 22a, and the depth of the supported groove 22a is set to be deeper than the depth of the ring mounting groove 22 b.
The operated portion 18 is formed in a shape protruding outward (in the radial direction) with respect to the shaft portion 17. The operated portion 18 is composed of a substantially disk-shaped base portion 24, a gear portion 25 formed on the front surface side of the base portion 24, and an operated protrusion 26 protruding rearward from the rear surface of the base portion 24.
The base portion 24 has a recessed portion 24a that opens rearward at a portion other than the outer peripheral portion.
The gear portion 25 is formed of convex portions 25a, … … and concave portions 25b, … … that are alternately continuous in the circumferential direction. The convex portion 25a and the concave portion 25b are set to have radial dimensions H1 and H3 larger than circumferential dimensions H2 and H4, respectively (see fig. 3). The front end surface of the convex portion 25a is formed into a gentle curved surface, and the bottom surface forming the concave portion 25b is also formed into a gentle curved surface.
The gear portion 25 is formed in a shape in which the outer diameter increases as it approaches the shaft portion 17 in the axial direction (see fig. 2). Therefore, the gear portion 25 is set in a state in which the outer diameter of the distal end 25d is larger than the outer diameter of the base end 25c, and the convex portion 25a and the concave portion 25b extend in a direction slightly inclined rearward and downward with respect to the radial direction.
The operated protrusion 26 protrudes rearward from the central portion of the base 24. Therefore, the recessed portion 24a formed in the base portion 24 is located around the protrusion 26 to be operated (see fig. 4). The operation target projection 26 has, for example, a hexagonal outer shape, and is a portion to which a tool such as a spanner or a wrench is engaged.
As a resin forming the optical axis adjusting screw 16 configured as described above, for example, a polyamide synthetic resin such as nylon is used. In the optical axis adjusting screw 16, for example, the operated portion 18 is formed of a resin material containing cellulose nanofibers, and the shaft portion 17 is formed of a resin material containing no cellulose nanofibers. However, the optical axis adjusting screw 16 may be entirely formed of a resin material containing cellulose nanofibers.
Cellulose nanofibers are biomass materials derived from plant fibers that have the characteristics of light weight, high strength, excellent environmental performance, and little thermal deformation. In particular, by incorporating cellulose nanofibers into a thermoplastic resin such as nylon, high strength of a molded article can be secured, and impact resistance can be improved.
The optical axis adjusting screws 16 and 16 are rotatably supported by the lamp housing 2 (see fig. 1 and 5). The optical axis adjusting screw 16 is supported by the lamp housing 2 by inserting the shaft portion 17 into the screw support hole 2a from the rear. An O-ring 27 is fitted to the ring mounting groove 22b of the optical axis adjusting screw 16.
When the elastic engaging portion 21 is inserted into the screw support hole 2a, the elastic engaging portion 21 slides in contact with the opening edge of the screw support hole 2a and is elastically deformed in a direction approaching the shaft portion 17. The elastic engaging portion 21 is elastically restored after being inserted into the screw supporting hole 2a as a whole, so that the restricting surface 21a comes into contact with the front opening edge of the screw supporting hole 2 a. Further, the O-ring 27 is in close contact with the rear opening edge of the screw support hole 2a in a state where the regulating surface 21a of the elastic engaging portion 21 is in contact with the front opening edge of the screw support hole 2 a. Therefore, the movement of the screw 16 for adjusting the optical axis in the axial direction with respect to the lamp housing 2 is restricted, and the O-ring 27 is closely attached to the rear surface of the lamp housing 2 to prevent the moisture from entering the lamp chamber 4a from the screw support hole 2 a.
The threaded portion 19 of the optical axis adjusting screw 16 is screwed into the screw portion 14a of the nut 14 connected to the nut connecting portion 12 of the reflector 9 (see fig. 1).
In the vehicle headlamp 1, when the optical axis adjusting screw 16 is operated and rotated, the nut 14 is moved in a direction (front-rear direction) corresponding to the rotation direction of the optical axis adjusting screw 16, and the lamp unit 8 tilts with respect to the lamp housing 2 in accordance with the movement of the nut 14. The optical axis adjusting screw 16 is rotated by rotating the gear portion 25 of the operated portion 18 with a tool 50 such as a screwdriver, for example (see fig. 5).
When the optical axis adjusting screw 16 positioned on the upper side is rotated, the lamp unit 8 is tilted upward and downward with respect to the lamp housing 2 using the nut 14 positioned on the lower side and the spherical portion 15c of the pivot member 15 as a fulcrum, and optical axis adjustment (light adjustment) in the vertical direction is performed.
On the other hand, when the optical axis adjusting screw 16 positioned on the lower side is rotated, the lamp unit 8 is tilted in the left-right direction with respect to the lamp housing 2 using the nut 14 positioned on the upper side and the spherical portion 15c of the pivot member 15 as a fulcrum, and optical axis adjustment (light adjustment) in the left-right direction is performed.
When the optical axis is adjusted as described above, the tool 50 such as a screwdriver is guided by the guide wall portions 6 and 6 of the lamp housing 2 and engages with the gear portion 25. At this time, since the gear portion 25 is set in a state in which the outer diameter of the distal end 25d is larger than the outer diameter of the base end 25c so that the convex portion 25a and the concave portion 25b extend in a direction slightly inclined rearward and downward with respect to the radial direction, the tool 50 can be inserted into the concave portion 25b along the convex portion 25a and the concave portion 25b in a state slightly inclined rearward and downward.
In this way, since the gear portion 25 of the optical axis adjusting screw 16 is inclined with respect to the radial direction, a good engagement state of the tool 50 with the gear portion 25 can be ensured when the tool 50 is engaged with the gear portion 25 in an inclined state. Therefore, the optical axis adjustment work can be performed in a state where the tool 50 is separated from the lamp housing 2, and the tool 50 and the lamp housing 2 are prevented from coming into contact with each other, so that the workability can be improved, and the lamp housing 2 can be prevented from being damaged.
In the vehicle headlamp 1, the optical axis adjustment can be performed by engaging a tool such as a wrench or a spanner with the operated projection 26 and rotating the optical axis adjustment screw 16 with the tool.
As described above, in the optical axis adjusting screw 16, the shaft portion 17 and the operated portion 18 are integrally formed of a resin material, the operated portion 18 is formed with the gear portion 25, the gear portion 25 is formed of the convex portions 25a, … … and the concave portions 25b, … … which are alternately continuous in the circumferential direction, and the convex portions 25a and the concave portions 25b are set such that the radial dimensions H1 and H3 are larger than the circumferential dimensions H2 and H4.
Therefore, the operated portion 18 having the gear portion 25 is formed integrally with the shaft portion 17 by a resin material, and the convex portion 25a and the concave portion 25b are formed in a shape extending in the radial direction so that the dimensions H1, H3 in the radial direction are larger than the dimensions H2, H4 in the circumferential direction, so that the strength of the gear portion 25 can be improved without causing an increase in manufacturing cost.
In particular, in the case where the gear portion is formed of a metal material, since the gear portion is easily formed to be thin, when the tip end portion of the tool 50 erroneously comes into contact with the convex portion when the tool 50 is engaged with the gear portion from above, the convex portion may be deformed, but by forming the convex portion 25a in a shape extending in the radial direction like the optical axis adjusting screw 16, the convex portion 25a is less likely to be deformed even when the tip end portion of the tool 50 erroneously comes into contact with the convex portion 25 a.
In addition, in the case of a configuration in which the shaft portion is formed of a resin material and the operated portion is formed of a metal material, it is necessary to form a screw for optical axis adjustment by insert molding or the like, and there is a possibility that the manufacturing cost increases, but by integrating the shaft portion 17 and the operated portion 18 with a resin material like the screw 16 for optical axis adjustment, the manufacturing cost can be reduced.
Further, in the optical axis adjusting screw 16, the operated portion 18 is provided with an operated protrusion 26, and a recessed portion 24a is formed around the operated protrusion 26 in the operated portion 18.
Therefore, the amount of projection of the operated projection 26 becomes large, the engagement area of a tool such as a wrench or a spanner with the operated projection 26 can be increased, and the workability in the optical axis adjustment work can be improved while shortening the length of the optical axis adjustment screw 16 in the axial direction.
Further, in the optical axis adjusting screw 16, at least the operated portion 18 is formed of a resin material containing cellulose nanofibers.
Therefore, the strength of the operated portion 18 is improved by the cellulose nanofibers, and breakage of the gear portion 25 when the tool 50 is engaged with the gear portion 25 can be prevented, and appropriate workability can be ensured in the optical axis adjustment work.
Here, the shaft portion 17 is provided with an elastic engaging portion 21, the elastic engaging portion 21 is engaged with a part of the lamp housing 2 to restrict the movement of the shaft portion 17 in the axial direction with respect to the lamp housing 2, and the shaft portion 17 is formed of a resin material not containing cellulose nanofibers.
Therefore, by including the cellulose nanofibers in the operated portion 18, the strength of the operated portion 18 is improved, and by not including the cellulose nanofibers in the shaft portion 17, the elastic engagement portion 21 is easily elastically deformed, so that it is possible to prevent breakage at the time of deformation of the elastic engagement portion 21 while securing high strength of the gear portion 25.
Claims (7)
1. An optical axis adjusting screw for adjusting an irradiation direction of light emitted from a light source of a lamp unit disposed in a lamp housing composed of a lamp housing and a cover,
the screw for optical axis adjustment includes:
a shaft portion having a threaded portion to be screwed with a nut provided to the lamp unit and a supported shaft portion rotatably supported by the lamp housing; and
an operated portion which is continuous with one end of the shaft portion in the axial direction and has a diameter larger than that of the shaft portion,
the shaft portion and the operated portion are formed integrally of a resin material,
a gear portion is formed on one axial surface side of the operated portion,
the gear portion is formed of a plurality of convex portions and a plurality of concave portions which are alternately continuous in the circumferential direction,
the convex portion and the concave portion are set to have a larger dimension in the radial direction than in the circumferential direction.
2. The screw for adjusting an optical axis according to claim 1,
the operated portion is provided with an operated protrusion on the other surface side in the axial direction,
a recessed portion that is open on a side from which the operated protrusion protrudes is formed around the operated protrusion in the operated portion.
3. The screw for adjusting an optical axis according to claim 1, wherein at least the operated portion is formed of a resin material containing cellulose nanofibers.
4. The screw for adjusting an optical axis according to claim 2, wherein at least the operated portion is formed of a resin material containing cellulose nanofibers.
5. The screw for adjusting an optical axis according to claim 3,
the shaft portion is provided with an elastic engaging portion which engages with a part of the lamp housing to restrict the movement of the shaft portion in the axial direction relative to the lamp housing,
the shaft portion is formed of a resin material containing no cellulose nanofibers.
6. The screw for adjusting an optical axis according to claim 4,
the shaft portion is provided with an elastic engaging portion which engages with a part of the lamp housing to restrict the movement of the shaft portion in the axial direction relative to the lamp housing,
the shaft portion is formed of a resin material containing no cellulose nanofibers.
7. The screw for adjusting an optical axis according to any one of claims 1 to 6, wherein the gear portion is formed in a shape in which an outer diameter thereof becomes larger as approaching the one surface in the axial direction.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| JP2020-140087 | 2020-08-21 | ||
| JP2020140087A JP2022035625A (en) | 2020-08-21 | 2020-08-21 | Screw for optical axis adjustment |
Publications (1)
| Publication Number | Publication Date |
|---|---|
| CN216644077U true CN216644077U (en) | 2022-05-31 |
Family
ID=80443539
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| CN202121906622.2U Active CN216644077U (en) | 2020-08-21 | 2021-08-16 | Screw for adjusting optical axis |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JP2022035625A (en) |
| CN (1) | CN216644077U (en) |
-
2020
- 2020-08-21 JP JP2020140087A patent/JP2022035625A/en active Pending
-
2021
- 2021-08-16 CN CN202121906622.2U patent/CN216644077U/en active Active
Also Published As
| Publication number | Publication date |
|---|---|
| JP2022035625A (en) | 2022-03-04 |
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