JP2601562Y2 - Aiming mechanism of automotive headlamp - 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. 5 is a view for explaining an aiming mechanism of a conventional reflector movable type automobile headlamp. A reflector 2 having a bulb (not shown) serving as a light source is mounted inside a lamp body 5. It is supported by a tilting fulcrum (not shown) and an aiming screw 1 rotatably supported by the lamp body 5. A male screw 1a is formed at the tip of the aiming screw 1, and the male screw 1a is screwed into a nut 4 fixed to a bracket 2a on the reflector 2 side. When the aiming screw 1 is turned, the nut 4 is
Since the reflector 2 moves back and forth along the line a, the reflector 2 moves back and forth around the tilting fulcrum (not shown).
Is tilted to adjust the aiming.

A bevel gear 6 is integrated with the rear end of the aiming screw 1 by caulking or the like, and a plus screwdriver 9 is extended from a direction substantially orthogonal to the aiming screw 1, for example, from above a headlamp. Tooth 6
The aiming screw 1 can be rotated by rotating the driver 9 by engaging the teeth 9a formed at the tip of the driver with a. A guide member 7 for guiding the side surface of the driver 9 is provided on the rear surface of the lamp body 5. When the driver 9 is brought into contact with the guide member 7, the driver teeth 9a are provided.
Are just in mesh with the teeth 6a of the gear 6.

[0004]

However, according to the above-mentioned prior art, if the driver 9 is forcibly applied with a force such that the torque of the aiming screw 1 is large, the teeth 9a of the driver become the teeth 6a of the gear. 6, the tip of the driver slides in the axial direction of the aiming screw 1 as shown by the arrow in FIG. 6, and the gear 6 is disengaged from the gear 6 so that the aiming screw 1 cannot be rotated properly. there were.

Therefore, as a result of studying the problems of the prior art, as a result, the sliding of the tip of the driver meshing with the bevel gear is directly prevented or the point of action of the reaction force from the bevel gear acting on the driver's teeth is determined. It has been made under the consideration that the engagement between the driver's teeth and the bevel gear's teeth is unlikely to be disengaged if at least one of the means of moving upward is adopted, and its purpose is to be orthogonal to the aiming screw. It is an object of the present invention to provide an aiming mechanism of an automobile headlamp capable of reliably transmitting a rotation of a driver to an aiming screw from a direction.

[0006]

In order to achieve the above object, in an aiming mechanism for a vehicle headlamp according to the present invention, there is provided a metal body for tilting and adjusting a reflector provided with a light source provided in a lamp body . The aiming screw penetrates the lamp body back and forth, and is rotatably supported at the lamp body penetrating part.Bevel gears with teeth facing the lamp body side are integrally formed on the protruding part of the aiming screw on the rear side of the lamp body. In the aiming mechanism of an automotive headlamp that rotates the aiming screw with a plus screwdriver whose tip is meshed with a bevel gear from a direction substantially perpendicular to the aiming screw, the inclination of the peak of the tooth at the tip of the driver, etc.
It has a new inclination, and when the aiming screw is turned,
The flange portion of the tapered shape in sliding contact with the teeth of the driver is formed integrally with the aiming screw so as to face the bevel gear, in which the driver tip is so hard to slide on the lamp body side.

[0007]

[Function] A taper-shaped flange portion is formed integrally with the aiming screw so as to be in sliding contact with the tooth portion of the driver that meshes with the bevel gear teeth. the reaction force of the bevel gear acts on the part, but a flange portion which slidably contacts the teeth of the driver to prevent the sliding of the aiming screw axis direction of the driver tip directly,
The meshing state between the driver teeth and the bevel gear teeth is maintained.

[0008]

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS Embodiments of the present invention will be described below in detail with reference to the drawings. 1 and 2 show an embodiment of the present invention,
FIG. 1 is a longitudinal sectional view of an aiming mechanism of an automobile headlamp, and FIG. 2 is an enlarged sectional view of a main part of the aiming mechanism.
In these figures, reference numeral 10 denotes a container-shaped lamp body made of a synthetic resin, and a front lens 11 is attached to a front opening of the lamp body 10 to form a lamp room space. A parabolic reflector 20 to which a certain valve (not shown) is mounted is housed.
The reflector 20 includes a metal aiming screw 30 that penetrates back and forth through a screw insertion hole 10a formed in the lamp body 10 and is rotatably supported in the screw insertion hole 10a, and another aiming screw having the same structure as the screw 30. (Not shown) and a ball joint forming a tilting fulcrum (not shown). A synthetic resin nut 20b is fitted to a bracket 20a extending from the back surface of the reflector 20, and a male screw portion 31 formed at the tip of the aiming screw 30 is screwed to the nut 20b. . Then, when the screw 30 is rotated, the nut 20b moves forward and backward along the male screw portion 31, the reflector-side bracket 20a moves forward and backward, and the reflector 20 tilts around the tilting fulcrum (ball joint) to adjust the aiming. .

A metal aiming screw 30 protruding from the rear side of the lamp body 10 has a flange 31 abutting on the rear surface of the lamp body 10 and a tooth 5 of the driver 50.
1 and a bevel gear 40 that meshes with 1 are provided integrally. That is, the aiming screw 30, the flange 31, and the bevel gear 40 are integrally formed by plastically processing a single metal bar by the header, and have high strength and excellent durability.

The bevel gear 40 is formed so that its teeth 41 face the rear surface of the lamp body 10, and the teeth of a Phillips screwdriver 50 that is orthogonal to the aiming screw 30 by extending from above the headlamp. 51 can be engaged. On the other hand, the flange 31 is
The taper inclined surface θ3 is equal to the inclination θ1 of the valley portion 41b (the inclination θ2 of the crest at the tip of the driver). When they mesh, they engage and abut against the ridges 51a of the driver's teeth 51 to prevent the driver tip 50a from sliding in the screw axis direction and maintain the meshing state between the driver's teeth 51 and the bevel gear teeth 41. It has the function of doing. Therefore, even if the driver's teeth 51 receive a large reaction force from the bevel gear teeth 41 by strongly pressing or rotating the driver 50, the engagement of the driver's teeth 51 with the bevel gear teeth 41 by the action of the flange 31. Since the state is maintained, the screw 30 is reliably rotated in conjunction with the rotation of the driver 50, and the aiming adjustment can be performed by tilting the reflector 20 smoothly.

The flange 31 contacts the rear surface of the lamp body 10 to prevent the aiming screw 30 from slipping forward. Lamp body 1 of screw 30
A groove 30d is provided at a position protruding forward from the front of the lamp body 10, and a push-on fix 60 is interposed between the groove 30d and the lamp body 10, so that the screw 30 is prevented from coming out backward and attached forward. It is being rushed.

A recess 10b is formed in a peripheral portion on the back side of the screw insertion hole 10a of the lamp body 10,
An O-ring 70 for sealing the screw insertion hole 10a is loaded in the recess 10b. A plain washer 80 is interposed between the O-ring 70 and the flange 31 to reduce the sliding resistance between the body 10 and the flange 31 to smoothly rotate the screw 30. Also,
The rear part of the bevel gear 40 is integrally formed with a hexagonal bolt head 40b with which a socket wrench can be engaged.

FIG. 3 is an aiming machine showing a reference example of the present invention.
It is an important section enlarged sectional view of a structure . The flange 32 in this reference example merely functions as a retaining portion for the aiming screw 30, and the flange 3 in the first embodiment does not function.
There is no effect that the sliding of the driver tip 50a is prevented as in 1. However, the area on the aiming screw side indicated by the reference numeral 41c of the bevel gear tooth 41 (area with low tooth height)
Are cut out, and only the region near the outer periphery of the tooth 41 (the region where the tooth height is high) is left. That is, the inclination .theta.4 of the bottom surface of the notch 41c is smaller than the inclination .theta.1 of the valley 41b of the gear tooth 41, so that the driver tooth 51 does not engage with the root side of the gear tooth 41 at all, and the tooth 41 has a high outer circumference. It has a structure that meshes only with the neighboring area. Therefore, bevel gear 4
The point of application of the reaction force acting from 0 to the driver 50 side is the position shown in FIG. 3H where the driver teeth 51 directly mesh with the bevel gear teeth 41, and the point of application of this reaction force is the first point. Since the position is shifted in the axial direction (root side) of the driver than in the case of the embodiment, the aiming screw 5
0 is difficult to slide.

Further, the driver teeth 51 and the bevel gear teeth 4
No. 1 meshes only in a deeply meshed area and does not mesh in a shallowly meshed area, so that the friction damage of the bevel gear teeth 41 is small and the durability is excellent. In addition, since the bevel gear teeth 41 have a structure in which a low-height region is cut off, there is an advantage that the header processing of the bevel gear is easy and the life of the mold is extended.

FIG. 4 shows a second embodiment of the present invention, which is a combination of the first embodiment and the above-mentioned reference example. That is, in the aiming screw 30,
The flange 31 for engaging and abutting the teeth 51 of the driver 50 to prevent the driver teeth 51 from sliding is integrally formed, and the root side of the bevel gear teeth 41 is cut out, so that the driver's teeth are removed from the bevel gear 40. The structure is such that the point of action of the reaction force acting on 51 moves toward the root of the driver, and the meshing between the teeth 41 and the teeth 51 is more secure than in the first embodiment.

[0017]

As is apparent from the above description, in the aiming mechanism of the automotive headlamp according to the present invention, the tip of the driver is prevented from sliding in the axial direction of the aiming screw, and the teeth of the driver are bevel gears. The aiming screw can be reliably rotated by the driver because it is held in a state of meshing with the teeth of the first lens, and accurate aiming adjustment can be performed .

[Brief description of the drawings]

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

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

FIG. 3 is a sectional view of an aiming mechanism as a reference example of the present invention;

FIG. 4 is a sectional view of an aiming mechanism according to a second embodiment of the present invention;

FIG. 5 is a cross-sectional view of a conventional headlamp aiming mechanism.

FIG. 6 is an enlarged sectional view of a main part of the aiming mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Synthetic resin lamp body 10a Screw insertion hole 20 Reflector 20b Reflector side nut 30 Aiming screw 31 Flange part 40 Bevel gear 41 Bevel gear tooth 41a Teeth peak 41b Teeth valley 50 Plus driver 50a Driver tip 51a Driver tip Tooth 51a Tooth ridge 51b Tooth valley

Claims (1)

(57) [Scope of request for utility model registration] 1. A metal aiming screw for tilting and adjusting a reflector provided with a light source, which is provided in a lamp body, penetrates the lamp body back and forth, and is rotatably supported at a lamp body penetrating portion. A bevel gear with teeth facing the lamp body is formed integrally with the projection on the back side of the lamp body, and the aiming screw is turned by a Phillips screwdriver whose tip is meshed with the bevel gear from a direction substantially orthogonal to the aiming screw. In the aiming mechanism of a car headlamp that operates dynamically, the inclination of the peak of the tooth at the tip of the driver
With the same inclination, when the aiming screw is turned
And characterized in that integrally formed, the driver tip is configured so hard to slide to the lamp body side flange portion of the tapered shape in sliding contact with the teeth of the driver aiming screw so as to face the bevel gear Aiming mechanism for automotive headlamps.