JPH0743843Y2 - Optical axis adjustment device cover mounting structure for vehicle lighting - Google Patents

Description

[Detailed description of the device]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cover for a device for adjusting an optical axis direction of a lighting fixture for a vehicle, such as a vehicle headlamp. For more details,
The present invention relates to a cover for an adjusting screw of a device for a vehicle lamp whose optical axis is installed substantially horizontally and which adjusts the optical axis so as to tilt the optical axis up and down.

[0002]

2. Description of the Related Art Headlights for automobiles are dangerous because they are dazzling to an oncoming vehicle if they are facing upwards too much. If it is too downward, the road ahead in the direction of travel will not be illuminated well and it will be difficult to drive.

Therefore, it is necessary to provide a vehicle headlamp with a device for adjusting the optical axis of the vehicle headlamp slightly upward and downward with the headlamp mounted on the vehicle body.

Generally, the headlamp has a structure in which a concave reflecting mirror is provided in the lamp housing and a light source bulb is positioned near the focal point of the concave reflecting mirror. The optical axis of the headlamp is the concave reflecting mirror. It means the axis of symmetry.

Therefore, in order to adjust the optical axis, (a) a unit movable type in which the relative position of the lamp housing and the concave reflecting mirror is kept constant and the lamp housing is tilted up and down, or (b) There are two methods: a reflector movable type that tilts the concave reflecting mirror up and down without moving the lamp housing attached to the body.

FIG. 5 shows a conventional example of a unit movable type optical axis adjusting device for tilting a lamp housing.

FIG. 6 shows a conventional example of a reflector movable type optical axis adjusting device for tilting a concave reflecting mirror up and down.

(Refer to FIG. 5) 1 is a lamp housing, the inner surface 1a of which is a concave reflecting mirror. ZZ is the optical axis,
F is the focus. The light source bulb 2 is provided near the focus F.

Reference numeral 3 is a front lens.

The lamp housing 1 is tiltably supported by a ball joint 4, and the lamp housing 1 is also supported.
A nut member 5 is attached to the above, and a male screw member 6 screwed to the nut member 5 can screw the nut member substantially parallel to the optical axis ZZ.

As a result, when the male screw member 6 is turned, the optical axis ZZ is reciprocally tilted forward (upward left in the figure) and downward (downward left).

The lamp housing 1'is fixed to the vehicle body (see FIG. 6).

A concave reflecting mirror 7 is tiltably supported on the lamp housing 1'via a ball joint 4 '. A nut member 5'is attached to the concave reflecting mirror 7 and a male screw member 6'is screwed therein.

When the nut member 5'is screw-fed by turning the male screw member 6 ', the optical axis ZZ is tilted up and down.

[0015]

In a simple headlamp for a vehicle (for example, a fog lamp), an optical axis adjusting device having a simple structure is used. For example, as shown in FIG. 7, one portion 7a of the concave reflecting mirror 7'is tiltably supported with respect to the lamp housing 1 "and a nut member 5" is attached to the other end. On the other hand, an optical axis adjusting screw 8 which is a male screw member is rotatably and non-slidably attached to the lamp housing 1 ″ and is screwed to the nut member 5 ″.

As a result, when the optical axis adjusting screw 8 is turned, the nut member 5 ″ is screw-fed, and the concave reflecting mirror 7 ′ tilts about its one end 7a, and the optical axis Z tilts up and down.

In the optical axis adjusting device having such a structure, the cover 9 is provided because the optical axis adjusting screw is exposed to the side of the front lens 3 ".

In the present invention, the term "lateral" means a direction substantially perpendicular to the optical axis Z direction, and does not necessarily mean "lateral side". When the optical axis Z is horizontal in the conventional example, the upper side and the lower side with respect to the earth are referred to as sideways in the present invention.

The cover 9 of this conventional example (FIG. 7) is provided with a hole 9a for inserting a driver for rotating the optical axis adjusting screw 8.

FIG. 8 shows a front view of the vehicle lamp of the conventional example (FIG. 7). 3 ″ is the above-mentioned front lens, and 9 is the above-mentioned cover. Since this cover 9 is generally made of glass or transparent synthetic resin and has the same appearance as the lens, it may be called a dummy lens,
Also called a mall.

As described above, the cover 9 of this embodiment is provided with the hole 9a for inserting the driver.
Since the mounting screw 9a of 1 appears on the outside, the appearance is complicated and it is not preferable in terms of design.

It is possible to omit the hole 9a, but when the hole 9a is not provided, the mounting screw 9b must be pulled out to remove the cover 9 when the optical axis is adjusted, so the adjustment operation is troublesome. Spend a long time at.

The present invention has been made in view of the above circumstances, and provides an optical axis adjusting device cover which can be quickly and easily attached / detached without the appearance of holes for optical axis adjustment and mounting screws. With the goal.

[0024]

In order to achieve the above object, an optical axis adjusting device cover according to the present invention has a structure in which a cover for covering an optical axis adjusting screw of a vehicle lamp is attached to a side of a front lens. A cover mounting flange laterally projecting from the front lens, a cover mounting flange laterally projecting from the lamp housing in which the front lens is mounted, and a cover engaging recess or cover provided on each of the two flanges. An engaging hole, an engaging claw fixed to the cover and engaging with a cover engaging concave portion or a cover engaging hole of the cover mounting flange of the front lens, and a cover mounting flange of the lamp housing fixed to the cover. And an engaging claw that engages with the cover engaging recess or the cover engaging hole.

[0025]

According to the above construction, the engaging claws of the cover engage with the engaging recesses or holes provided in the flange of the front lens and the flange of the lamp housing, respectively. The engaging claws can be bent to attach and detach quickly and easily. Since it is easy to attach / detach, there is no inconvenience even if the driver insertion hole is omitted, and since it is mounted without using the mounting screw, the external appearance of the mounting screw and the driver insertion hole Does not appear, increasing the design value.

[0026]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 is a sectional view showing an embodiment of a cover mounting structure for an optical axis adjusting device according to the present invention, in which a cover 11 is attached to a front lens 3 ".

An external view of the cover 11 viewed in the direction of arrow A is shown in FIG. 2, and an external view in the direction of arrow B is shown in FIG.

4 is a schematic view of the front lens 3 "and the lamp housing 10 as viewed in the direction of arrow B. FIG.
FIG. 4 is an exploded view when viewed as a pair.

The lamp housing 10 is integrally provided with a housing flange 10a protruding laterally, and an engaging hole 10b is formed in the housing flange 10a.
To provide.

The front lens 3 "is also integrally provided with a lens flange 3a protruding laterally, and an engaging recess 3b is formed at the base side thereof.

On the other hand, the cover 11 has a lens engaging claw 11a which engages with the engaging recess 3b of the lens flange 3a.
A housing engagement claw 11b that engages with the engagement hole of the housing flange 10a, and a holding piece 11c that is disposed so as to face the housing engagement claw 11b and sandwiches the housing flange 10a. It is integrally molded using a transparent synthetic resin material.

As a result, as shown in FIG. 1, the housing engagement claw 11b is sandwiched between the housing engagement claw 11b and the holding piece 11c, and the housing engagement claw 11b is held.
Is engaged with the engaging hole 10b of the housing flange 10a, and the lens engaging claw 11a is attached to the lens flange 3a.
The cover 11 can be attached and fixed to the side (upper side in the drawing) of the front lens 3 ″ by engaging with the engaging recess 3b of the above.

From the mounted state shown in FIG. 1, the cover 11
The cover can be easily removed by bending the lens engagement claw 11a, the housing engagement claw 11b, and the holding piece 11c by applying a hand force to the. Further, the removed cover 11 can be easily attached.

Since the cover 11 of this embodiment can be quickly and easily attached / detached to the side of the front lens 3 "as described above, it is not necessary to use a separate mounting screw. Even if the driver insertion hole is not provided, there is no difficulty in adjusting the optical axis, so that the appearance is not complicated by the cover mounting screw and the driver insertion hole, and the design value is increased.

The embodiment shown in FIG. 1 is, for example, as shown in FIG.
It is also possible to apply to a unit movable type lamp such as the above, and also to a reflector movable type lamp as shown in FIG. 6, for example.

[0036]

As described above, when the optical axis adjusting device cover mounting structure according to the present invention is applied, the optical axis adjusting hole and the cover mounting screw do not appear in the appearance, and the cover can be quickly and easily attached and detached. Therefore, it is convenient for the optical axis adjustment operation.

[Brief description of drawings]

FIG. 1 is a sectional view of an embodiment of the present invention.

FIG. 2 is a view of the cover in FIG.

FIG. 3 is a view similarly seen from the arrow B.

FIG. 4 is a B arrow view of the front lens and the lamp housing in the embodiment shown in FIG.

FIG. 5 is a cross-sectional view for explaining a conventional vehicle lamp including a unit movable type optical axis adjusting device.

FIG. 6 is a cross-sectional view for explaining a conventional vehicle lamp including a reflector-movable optical axis adjusting device.

FIG. 7 is a cross-sectional view for explaining a vehicular lamp having an optical axis adjusting device having a cover of a conventional example and its problems.

FIG. 8 is a front view of the same.

[Explanation of symbols]

 1 Lamp Housing 2 Light Source Bulb 3 Front Lens 4 Ball Joint 5 Nut Member 6 Male Screw Member 7 Concave Reflector 8 Optical Axis Adjustment Screw 9 Cover 9a Hole 9b Mounting Screw 10 Lamp Housing 10a Housing Flange 10b Engagement Hole 11 Cover 11a For Lens Engaging claw 11b Engaging claw 11c for housing Holding piece

Claims (1)

[Scope of utility model registration request] 1. A structure for mounting a cover for covering an optical axis adjusting screw of a vehicle lamp on a side of a front lens, wherein a cover mounting flange protruding laterally from the front lens and a side of a lamp housing on which the front lens is mounted. A cover mounting flange protruding toward one side, a cover engaging recess or cover engaging hole provided in each of the two flanges, and a cover engaging recess or cover of the cover mounting flange of the front lens fixed to the cover. An engaging claw that engages with the engaging hole, and an engaging claw that is fixed to the cover and that engages with the cover engaging recess or the cover engaging hole of the cover mounting flange of the lamp housing. An optical axis adjusting device cover mounting structure for a vehicle lamp.