JP2548807Y2 - Headlamp aiming mechanism - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an aiming mechanism of a reflector movable type headlamp for an automobile or the like.

[0002]

2. Description of the Related Art FIG. 4 is a view for explaining an aiming mechanism of a conventional reflector movable type headlamp. The reflector 2 is supported by a tilting fulcrum (not shown) fixed to the lamp body 5 and a tip of an aiming screw 1 penetratingly supported by the lamp body 5. The tip of the aiming screw 1 is screwed with a nut 4 fixed to the end 3 of the reflector 2. When the aiming screw 1 is rotated, the reflector end 3 moves back and forth, and the reflector 2 tilts (not shown). Tilt around the fulcrum to adjust the aiming. Aiming screw 1
At the rear end, a metal crown gear 6 is integrated, and the tip 6a of the plus screwdriver 9 is meshed with the teeth 6a of the crown gear 6, and the plus screwdriver 9 is rotated.
The aiming screw 1 can rotate. Lamp body 5
A cylindrical guide holder 7 made of synthetic resin into which a Phillips screwdriver 9 is inserted is fixed on the back surface of the screwdriver, and a Phillips screwdriver tip 9a is received by a stopper piece 7c formed inside the guide holder 7, and the crown is formed. The meshing between the gear teeth 6a and the tip 9a of the Phillips screwdriver is ensured.

[0003]

However, in the above-described prior art, the crown gear teeth 6a and the stopper pieces 7c that are in sliding contact with the tip 9a of the Phillips screwdriver are made of metal and synthetic resin, respectively, and have significantly different hardnesses. ing. For this reason,
While performing the aiming adjustment many times, the stopper piece 7c made of synthetic resin, which is softer than the hard crown gear teeth 6a, wears out first, and the tip 9a of the plus screwdriver and the crown gear teeth 6a.
There has been a problem that the meshing state with a is deteriorated, that is, the operability of aiming is deteriorated.

[0004] Further, since the crown gear teeth 6a are made of metal (generally made of an iron alloy that is easy to process), there is a problem that the meshing state with the driver tip 9a deteriorates due to rust.
The present invention has been made in view of the problems of the prior art,
It is an object of the present invention to provide a headlamp aiming mechanism that does not impair the operability of the aiming screw.

[0005]

In order to achieve the above object, in an aiming mechanism of a headlamp according to the present invention, an aiming screw for supporting a reflector is made to penetrate a synthetic resin lamp body back and forth, and a penetrating portion is provided. At a rear portion of the aiming screw, substantially orthogonal to the aiming screw.
The tip of a Phillips screwdriver approached from the direction
Screwdriver in the form of contact with the
A bevel gear made of synthetic resin having teeth that can be engaged with the teeth of the lamp body, and a bevel gear of the bevel gear at the rear of the lamp body.
The teeth of a Phillips screwdriver slide into contact with the
Engage the teeth of the lath driver with the teeth of the bevel gear
, A synthetic resin driver integrally molded with the lamp body
A receiving portion is provided.

[0006]

[Function] The force pressing the driver against the bevel gear is the driver
When the tip of the
Between the driver's teeth and the bevel gear's teeth.
And between the driver's teeth and the driver receiver.
The pressing force used is small, and the bevel gear teeth and driver
Wear of the receiving portion is suppressed. Furthermore, since the bevel gear and the driver receiving part are both made of synthetic resin and have the same hardness,
When the bevel gear is made of metal and the driver receiving part is made of synthetic resin
In comparison, only the driver receiving part is significantly worn down
No meshing between the teeth of the plus screwdriver and the teeth of the bevel gear
The state is kept constant. Further, since the bevel gear and driver receiving part are both made of synthetic resin, rust Purasudora
The meshing condition between the tooth portion of the diver and the tooth portion of the bevel gear does not deteriorate. The driver receiving part is integrated with the lamp body
The driver receiving part is made of a separate member because it is molded.
The number of parts that make up the aiming mechanism
And the structure becomes simpler.

[0007]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. FIG. 1 is a longitudinal sectional view showing an embodiment of an aiming mechanism for a headlamp according to the present invention, FIG. 2 is a longitudinal sectional view showing a main part of the aiming mechanism, and FIG. Part of the aiming mechanism (III-III in FIG. 2)
FIG.

In these figures, reference numeral 10 denotes a container-shaped lamp body made of synthetic resin, and a front lens 10b is attached to a front opening of the lamp body 10 to form a lamp room space. A reflector 20 in which a valve (not shown) is inserted is housed and arranged. Symbol 30
Shows a metal aiming screw which penetrates the lamp body 10 back and forth and is rotatably supported at the penetrating portion. The reflector 20 is provided with a tip portion 31 of the screw 30 and an illustration provided on the lamp body 10. Not supported by tilting fulcrum. The tip 31 of the aiming screw 30 is
Synthetic resin nut 20 fixed to the back side of the end 20a
When the screw 30 is rotated, the reflector end 20a is moved forward and backward, and the reflector 20 is tilted around a tilt support (not shown) to adjust the aiming.

The metal aiming screw 30 has a flange 3 at the rear end of the metal aiming screw 30 protruding from the back of the lamp body 10.
0a is formed, and the flange 30 of the screw 30 is formed.
Bevel gear 40 made of synthetic resin is integrated with the rear part by insert molding. The bevel gear 40 integrated portion of the screw 30 has a bevel gear retaining step portion 30b,
A bevel gear idling prevention serration portion 30c is formed sandwiching the step portion 30b. The teeth 40 a of the bevel gear 40 are formed so as to be able to mesh with the teeth 50 a at the tip of the Phillips screwdriver 50 and to face the rear side of the lamp body 10. On the other hand, on the rear surface of the body 10, a guide cylinder 11 that screwdriver 50 can be inserted, Guy
By being supported by the barrel 11, the aiming screw 3
The tip of the driver 50 extending from the direction orthogonal to
In the form of contact with the imming screw, the tooth portion 50a at the tip of the Phillips screwdriver is received, and the tip of the tip of the Phillips screwdriver is received.
The tooth portion 50a and the driver receiving portion 12 for ensuring the engagement between the teeth 40a of the bevel gear 40 are integrally formed of synthetic resin. That is, when inserted and fitted a Phillips screwdriver 50 abutted to the tip of a Phillips screwdriver driver receiving part 12 to the guide cylinder 11, teeth 40a and a Phillips screwdriver destination bevel gear
The tooth portion 50a at the end is meshed, and the screwdriver 30 is turned smoothly while the plus screwdriver 50 is turned,
Aiming adjustment can be performed by tilting the reflector 20.

The aiming screw 30 is mounted on the flange 3
Oa abuts on the rear surface of the lamp body 10 to prevent it from slipping forward. On the other hand, at a position where the screw 30 protrudes from the front surface of the lamp body 10, a groove 30d is formed in the circumferential direction.
Is formed, and a push-on fix 60 is attached to the groove 30d in a direction of pressing the front surface of the lamp body 10, and the screw 30 is prevented from falling backward and urged forward. Thus, the screw 30
Is rotatably supported by the lamp body 10.

A recess 10a is formed in a portion of the back of the lamp body 10 where the aiming screw 30 penetrates, and a rubber O seals the space between the body 10 and the screw 30.
The ring 70 is inserted. A plain washer 80 is interposed between the O-ring 70 and the flange 30a to conceal the O-ring 70 and to make the sliding contact between the back surface of the body 10 and the flange 30a smooth and to easily rotate the screw 30. .

Further, between the front side of the lamp body 10 and the push-on fix 60, the slidability between the body 10 and the push-on fix 60 is enhanced, and the screw 3
A wave washer 90 that functions as a zero-loosening stop is interposed. The rear part of the bevel gear 40 is formed as a hexagonal bolt head 40b with which a socket wrench can be engaged. At the center of the front of the bolt head 40b, a plus-shaped recess with which a tooth part 50a at the tip of a Phillips screwdriver can be engaged. 40c are formed.

In this embodiment, the aiming screw 30 is made of metal and the bevel gear 40 is made of synthetic resin. However, the aiming screw 30 may be made of synthetic resin. It may be formed integrally with resin.

[0014]

[Effect of the Invention] As is clear from the above description, the aiming mechanism of the headlamp according to the present invention has a dry head.
From the bar teeth to the bevel gear teeth and driver receiver
Bevel gear teeth and dry
The less the bar receiver is worn, the more the Phillips screwdriver
Bevel gear teeth and driver teeth that mesh with the teeth
Since both driver receiving parts that come into sliding contact wear out almost in the same way, even if the aiming adjustment is repeated, the meshing state between the toothed part of the plus screwdriver and the toothed part of the bevel gear is always kept constant, and constant operation is achieved. Is guaranteed for a long time.

Further, since the bevel gear and the driver receiving portion are not rusted and the meshing condition between the tooth portion of the plus driver and the tooth portion of the bevel gear is not deteriorated, an aiming mechanism for a headlamp having high environmental resistance can be obtained. . Also, the driver receiving section
Is integrally molded with the lamp body,
The number of components of the aiming mechanism is reduced, and the structure is simplified.
And easy assembling work of the aiming mechanism.
Has an effect.

[Brief description of the drawings]

FIG. 1 is a longitudinal sectional view showing an embodiment of a headlamp aiming mechanism according to the present invention.

FIG. 2 is a longitudinal sectional view of a main part of the aiming mechanism.

FIG. 3 is a front view showing a part of the aiming mechanism in a cutaway manner;

FIG. 4 is a vertical view of a conventional headlamp aiming mechanism.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 10 Synthetic resin lamp body 12 Synthetic resin screwdriver receiving part 20 Reflector 30 Aiming screw 40 Synthetic resin bevel gear 50a Phillips screwdriver tip tooth

Claims (1)

(57) [Scope of request for utility model registration] 1. A aiming screw which supports the reflector is rotatably supported at the penetrating portion with penetrating synthetic resin lamp body back and forth, a rear portion of the aiming screw, to the aiming screw
The tip of a Phillips screwdriver approached from a direction almost perpendicular
Is in contact with the aiming screw.
A synthetic resin bevel gear having teeth that can mesh with the teeth of the iver is integrally provided, and the bevel tooth at the rear of the lamp body is provided.
At the position facing the tooth of the car, the tooth of the Phillips screwdriver
Are in sliding contact with each other and the teeth of the plus driver and the teeth of the bevel gear mesh.
Synthetic resin molded integrally with the lamp body to ensure matching
An aiming mechanism for a headlamp, which is provided with a driver receiving portion made of a headlamp.