JPH0621103U - Vehicle headlights - Google Patents

Abstract

(57) [Abstract] [Purpose] In a vehicle headlamp equipped with an optical axis adjustment mechanism, the optical axis is prevented from shifting to the left or right even if the optical axis is adjusted. [Structure] A pair of leg plates 5 is provided on the rear side of the reflector 5.
a and 5a are provided, and the shaft member 5b is provided on the outer surface of each leg plate 5a. On the other hand, the inner surface side of the housing 1 is provided with cylindrical seats 1a, 1a capable of respectively receiving the pair of shaft members 5b, 5b, and when received, the side surface of the distal end portion of the leg plate 5a is in the cylindrical seat. The dimension between the cylindrical seats is set so as to contact the end surface of 1a. [Effect] The turning fulcrum of the reflector 5 is set to the pair of shaft members 5
Since it is composed of b and the cylindrical seat 1a for receiving it, the optical axis does not shift to the left and right even if the optical axis is adjusted.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicle headlamp, and more particularly to improvement of a vehicle headlamp having an optical axis adjusting mechanism.

[0002]

[Prior art]

 Conventionally, as a vehicle headlamp having an optical axis adjusting mechanism, ones shown in FIGS. 3 to 6 are known. In the figure, 1 is a headlamp housing, 2 is a housing cap, 3 is a front lens, 4 is a light source bulb, 5 is a reflector, and 6 is a reflector support frame. The joints 7 are fixed, and the pair of ball joints 7 are respectively supported by the ball receiving seats 8 provided on the housing 1 and serve as a rotation fulcrum for adjusting the optical axis.

The other end of the frame 6 is supported by an adjusting screw portion. That is, 9 is a screw cylinder fixed to the frame side, 10 is a screw shaft screwed into the screw cylinder, and this screw shaft 10 penetrates the housing 1 and is projected to the outside. The gear 11 is fixed, while the operating shaft 13 is rotatably supported by the holding member 12 provided outside the housing 1, and the gear 14 fixed to the tip of the operating shaft is meshed with the gear 11. There is.

In the optical axis adjusting mechanism having the above-described configuration, the screw shaft 10 is rotated via the gears 14 and 11 by rotating the operation shaft 13 (forward or reverse rotation), and the screw cylinder 9 meshed with the screw shaft 9 is rotated. Is screwed, the frame 6 fixed to the screw cylinder 9 is integrated with the reflector 5, and tilts vertically with the ball joint 7 and the ball receiving seat 8 as a fulcrum to adjust the optical axis.

[0005]

[Problems to be Solved by the Invention] In the above configuration, since the fulcrum for adjusting the optical axis in the vertical direction is set at two ball joints, the optical axis in the left and right directions is provided with two ball seats that support the ball joint. However, since the contact surface between the ball joint and the ball seat is a spherical surface, errors during molding tend to occur, and this causes the optical axis to shift left and right. Further, when the size of the lamp is reduced and the dimension between the fulcrums is shortened, there is a problem that the left and right optical axes are largely displaced by a small error. Also, since the fulcrum structure is formed at two ball joints, assembly may not be possible unless the dimensions between the fulcrums are accurate.

[0006]

[The purpose of the device]

 An object of the present invention is to provide a vehicle headlamp that eliminates all the drawbacks of the conventional optical axis adjusting mechanism described above.

[0007]

[Means for Solving the Problems]

 According to the present invention, in a vehicle headlight, a reflector equipped with a light source bulb is tiltably supported at two fulcrums with respect to a housing, and an operating mechanism for tilting the reflector is provided. The gist is that it is composed of a cylindrical seat for receiving.

[0008]

[Action]

 As described above, according to the structure in which the two fulcrums are composed of the shaft member and the cylindrical seat that receives the shaft member, the optical axis does not shift left and right even if the optical axis is adjusted. In addition, the long fulcrum holding shape stabilizes the optical axis adjustment. In addition, the dimensional accuracy of the parts is improved, which facilitates assembly.

[0009]

【Example】

 1 and 2 show an embodiment of the present invention. In the figure, 1 is a housing of a headlamp, and 5 is a reflector. On the rear side of the reflector 5, two leg plates 5a, 5a facing each other with a required space are integrally provided, and a shaft member 5b is projectingly provided on the non-opposing surface side of each leg plate 5a so as to align the axes. ing. On the other hand, on the inner surface side of the housing 1, there is integrally provided a cylindrical seat 1a capable of receiving the pair of shaft members 5b, respectively, and when received, the side surfaces of the tip portions of the leg plates 5a, 5a are fixed. The dimension between the tubular seats 1a, 1a is set so as to come into contact with the end faces of the tubular seats 1a, 1a, respectively. In the case where the reflector 5 is supported by a frame, a shaft member 5b is provided on the frame.

The reflector 5 is tilted in the up-down direction by a not-shown operation mechanism section about a bivot consisting of the shaft member 5b and the cylindrical seat 1a as a fulcrum, and the optical axis is adjusted.

As described above, according to the rotary fulcrum for tilting the reflector 5 that is composed of the pair of shaft members 5b and the cylindrical seat 1a, the optical axis does not shift in the left-right direction. Further, even if vibration or shock is applied, there is no possibility that the optical axis will shift to the left or right.

[0012] In addition, according to the above configuration, the dimensional accuracy of the component is obtained, and therefore the assembly is easy. In addition, the holding shape of the fulcrum is long, which stabilizes the optical axis adjustment. Furthermore, by integrating the fulcrum portion, the cost can be reduced.

[0013]

[Effect of device]

 According to the present invention, since the pivot fulcrum for tilting the reflector is composed of the shaft member and the cylindrical seat for receiving the shaft member, the optical axis does not shift to the left or right even if the optical axis is adjusted. It is possible to obtain a stable optical axis adjusting mechanism.

[Brief description of drawings]

FIG. 1 is a cross-sectional view of a reflector rotation fulcrum portion in a vehicle headlamp showing an embodiment of the present invention.

FIG. 2 is an exploded perspective view of a rotation fulcrum portion.

FIG. 3 is a front view of a conventional vehicle headlamp.

FIG. 4 is a central sectional view of FIG.

5 is a sectional view taken along line (XX) of FIG.

6 is a cross-sectional view taken along the line (YY) of FIG.

[Explanation of Codes] 1 Housing 1a Cylindrical seat 2 Cap 3 Front lens 4 Light source bulb 5 Reflector 5a Leg plate 5b Shaft member 6 Reflector support frame 7 Ball joint 8 Ball seat 9 Screw cylinder 10 Screw shaft 11 Crown gear 12 Carrying receiver Member 14 Gear

Claims (1)

[Scope of utility model registration request] 1. A vehicle headlamp, comprising: a reflector to which a light source bulb is attached, a tilting support at two fulcrums with respect to a housing, and an operation mechanism portion for tilting the reflector, wherein each fulcrum is a shaft member. A vehicle headlamp, comprising: a cylindrical seat that receives this.