JPH0524599Y2 - - Google Patents

Description

[Detailed explanation of the idea] [Industrial application field]

The present invention relates to an aiming device for adjusting the optical axis of a vehicle headlamp in an appropriate direction.

[Prior Art] A conventional device of this type is Utility Model Publication No. 58-21441 by the same applicant, and as shown in the publication and drawings, an adjusting screw in an aiming device is protruded from a lamp housing. a crown gear-shaped rotating member is fixed to the head of the guide, and a Phillips screwdriver that engages with the teeth of the rotating member to rotate the rotating member is held in a direction perpendicular to the axis of the rotating member. The holder is fixed to the back side of the lamp housing in close proximity to the rotating member.

[Problem that the idea aims to solve]

However, as clearly shown in Figure 4 of the same publication, the conventional structure described above has
The head of the adjustment screw is fixed to the lamp housing, and a nut fixed to the reflector is screwed into the threaded part at the opposite end of the head, and the nut has a circular shape. Since the threaded portion moves back and forth in an arc, one of the two points of support may become eccentric depending on the state of adjustment, resulting in the problem that it is difficult to rotate this adjustment screw due to so-called serration. It had become something that would give rise to In addition, although the teeth of the rotating member are formed in a shape that meshes with one point of the teeth of the Phillips screwdriver, if the user presses excessively, they may mesh with a thicker part, causing the rotating member and the lamp housing to Also, there was a problem in that it was difficult to rotate the adjusting screw, and it was a challenge to solve these problems.

[Means to solve the problem]

The present invention is a specific means for solving the problems that occur with the conventional structure described above, and includes a crown gear-shaped rotating member fixed to the head of an adjustment screw protruding from the lamp housing, and a rotary member that rotates the rotating member. In the aiming device for a vehicle headlamp, a guide holder for holding a Phillips screwdriver in a direction perpendicular to the axis of the rotating member for adjusting the adjustment is fixed close to the rear side of the lamp housing. A hemispherical bearing member is fixed to the top surface of the head of the rotating member, and the base of the rotating member is formed into a hemispherical surface facing the bearing member, and the adjusting screw is connected to the adjusting screw through a buffer washer so as to be able to swing as appropriate. The vehicle is characterized in that the lamp housing is fixed to the lamp housing by being sandwiched between spherical bearings that correspond to the hemispherical surface of the bearing member provided on the guide holder and the hemispherical surface of the rotating member. By providing an aiming device for a vehicle headlamp, it is possible to eliminate mating and lubricate rotation, thereby solving the above-mentioned conventional problems.

【Example】

Next, the present invention will be explained in detail based on an embodiment shown in the drawings. In this example, in order to simplify the explanation and make it easier to understand, only the parts related to the present invention will be explained. Needless to say, the structure is similar to that of the conventional example. What is indicated by the reference numeral 1 in FIG. 1 is an adjustment screw, and the end surface of the head of this adjustment screw 1, that is, the top surface 1
A hemispherical bearing member 2 is fixed to a by, for example, screwing. At the same time, a hemispherical surface 3a is formed at the base of the rotating member 3 formed in the shape of a crown gear fixed to the head, that is, at a portion near the center so as to face the bearing member 2 and have a biconvex shape. Furthermore, this rotating member 3 is fixed to the adjustment screw 1 via a disc-shaped buffer washer 4 made of steel or the like having appropriate elasticity. At this time, the diameter of the relief hole 3b provided at the zenith of the hemispherical surface 3a is appropriately larger than the diameter of the adjustment screw 1, so that the adjustment screw 1 and the rotating member 3 come into contact at this portion. Therefore, the rotating member 3 is made to be able to swing as appropriate with respect to the adjusting screw 1 due to external stress or the like due to the elasticity of the buffer washer 4. Further, a hemispherical surface 3a provided on the bearing member 2 and the rotating member 3
Preferably, they are spherical surfaces that share a center and have the same radius. Here, in the above-mentioned structure, specifically, the rotating member 3 and the buffer washer 4 are coaxially fixed in advance by spot welding or the like, and the buffer washer 4 is sandwiched between the rotating member 3 and the buffer washer 4 when screwing the bearing member 2. This can be easily implemented by doing so. The adjusting screw 1 to which the bearing member 2 and the rotating member 3 are fixed is divided into upper and lower halves, each having a concave spherical surface 5c corresponding to the bearing member 2 and the rotating member 3, respectively.
5d, and is sandwiched between guide holders 5a and 5b provided with a guide portion 5e for holding the Phillips screwdriver 10 in a direction perpendicular to the axis of the rotating member 3, and fixed to the lamp housing 11. As a result, the concave spherical surfaces 5c and 5d act as spherical bearings. With the above structure, the head of the adjusting screw 1 is held as a spherical bearing, and the eccentricity of one of the other bearings, such as a nut, can be absorbed by being able to swing in all directions. becomes. At this time, the rotating member 3 is held at its initial position by the hemispherical surface 3a provided on the rotating member 3, the concave spherical surface 5c provided on the guide holder 5a, and the deformation of the buffer washer 4, and the adjusting screw 1 The resulting inclination will not cause any inclination or eccentricity,
To prevent discomfort during adjustment using a Phillips screwdriver 10. Further, when excessive pressure is applied to the Phillips screwdriver 10, the buffer washer 4 is deformed so as to be tilted, and at the same time, the rotating member 3 is also tilted. This is absorbed by sliding coaxially with the spherical surface 5c, and there is no difficulty in rotating the adjusting screw 1. That is, in the present invention, both the adjusting screw 1 and the rotating member 3 are provided with holding means using a hemispherical surface and a concave spherical surface, thereby reducing the influence of the swinging or eccentricity of one on the other.
This provides greater lubricity for operation.

[Effect of the idea]

As explained above, according to the present invention, a hemispherical bearing member is fixed to the top surface of the head of the adjustment screw, and the base of the rotating member is formed into a hemispherical surface facing the bearing member, and The aiming device of the present invention has a structure in which the bearing member is fixed to the lamp housing by a spherical bearing provided in the guide holder, and is fixed to the lamp housing through a buffer washer so as to be able to swing appropriately. The hemispherical surface of the rotating member is held by the guide holder so that it can swing in all directions, and it swings to respond to eccentricity caused by, for example, the arcuate movement of the nut or assembly error. This eliminates the difficulty in rotating the adjustment screw due to the misalignment, and also prevents the rotary member from impairing the ability to swing through the buffer washer due to excessive pressure from the Phillips screwdriver 10. By making it possible to tilt without any problem, the difficulty in turning due to this factor is eliminated, and the aiming work of the vehicle headlamp can be performed with lubrication and accuracy, which is an extremely excellent effect.

[Brief explanation of the drawing]

FIG. 1 is a sectional view showing a main part of an aiming device for a vehicle headlamp according to the present invention. DESCRIPTION OF SYMBOLS 1... Adjustment screw, 2... Bearing member, 3... Rotating member, 3a... Hemispherical surface, 3b... Relief hole, 4...
...Buffer washer, 5a, 5b...Guide holder,
5c, 5d... Concave spherical surface, 5e... Guide portion, 1
0... Phillips screwdriver, 11... Lamp housing.

Claims (1)

[Scope of utility model registration request] A crown gear-shaped rotating member fixed to the head of an adjustment screw protruding from the lamp housing, and a guide holder that holds a Phillips screwdriver for rotating the rotating member in a direction perpendicular to the axis of the rotating member. In the aiming device for a vehicle headlamp, the aiming device includes a hemispherical bearing member fixed to the top surface of the head of the adjustment screw, and a hemispherical bearing member fixed to the top surface of the head of the adjustment screw; The base of the bearing member is formed into a hemispherical surface facing the bearing member, and the adjustment screw is fixed to the hemispherical surface of the bearing member provided on the guide holder through a buffer washer so as to be able to swing appropriately. An aiming device for a vehicle headlamp, characterized in that the aiming device is fixed to the lamp housing by being clamped by a spherical bearing corresponding to a hemispherical surface of a rotating member.