JP2579620Y2 - Vehicle lighting - Google Patents

Description

[Detailed description of the invention]

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicular lamp, and more particularly to an improvement of a headlight aiming mechanism.

[0002]

2. Description of the Related Art As is well known, a headlight of an automobile is provided with a lamp unit including a reflector, a bulb, and the like, which is disposed so as to be tiltable in the front-rear and left-right directions with respect to a vehicle body. When the lens is tilted by the aiming mechanism at the time of replacement or the like, the inclination of the optical axis, in other words, the adjustment of the irradiation angle (commonly called aiming adjustment)
It is configured to be able to perform. Various types of such aiming mechanisms have been conventionally proposed, but the most common one is known as the aiming mechanism 1 shown in FIG. The aiming mechanism 1 supports a lamp unit 2 at three points with respect to a housing 3 fixed to the vehicle body so as to be freely adjustable in angle. A turning fulcrum shaft 5 constituting a turning fulcrum of a reflector 4 constituting the lamp unit.
And two aiming screws 6 for rotating the reflector 4 back and forth and left and right about the rotation fulcrum 5. However, only the aiming screw rotated in the front-rear direction is shown in the drawing. The rotation fulcrum shaft 5 is implanted on the front surface of the housing 3 and at a position obliquely right below the horizontal axis (optical axis horizontal line) and the vertical axis (optical axis vertical line) passing through the center of the headlight and at a required distance from the vertical axis. The spherical head 5A provided at the tip is relatively slidably fitted and connected to the spherical seat 7A of the cylindrical bearing 7 attached to the back surface of the reflector 4, and the spherical center of the spherical head 5A is Form the rotation center 0 of the lamp unit 2. The aiming screw 6 is provided with an insertion hole 8 provided at the upper left of the rear surface of the housing 3.
Is rotatably penetrated, and the tip is
Is screwed and connected to a screw hole 10 of a self-locking nut (nut member) 9 attached to an upper part of the rear surface of the nut. The aiming screw 6 can be tilted at a small angle to prevent movement in the axial direction, and a small-diameter guide portion 6a having an appropriate length is integrally protruded from the distal end surface. The small-diameter guide portion 6a is provided with a self-locking nut 9 during assembly.
To prevent the lamp unit 2 from falling forward. That is, in the case of the lamp unit whose center of gravity is higher than the center of rotation 0, the lamp unit 2 falls forward unless the aiming screw 6 is screwed to the self-locking nut 9.
Therefore, the small diameter guide portion 6a is connected to the self-locking nut 9.
When the aiming screw 6 is screwed into the self-locking nut 9 in a state where the lamp unit 2 is temporarily supported by being inserted into the screw hole portion 10, the lamp unit 2 can be prevented from falling.

In such a configuration, when the aiming screw 6 is rotated from the rear of the housing 3, the self-locking nut 9 moves back and forth along the aiming screw 6, so that the reflector 4, that is, the lamp unit 2 rotates. The fulcrum shaft 5 is rotated in the front-rear direction about the spherical head 5A, whereby the irradiation angle of the headlight is adjusted upward or downward.

[0004]

As described above, in the conventional vehicular lamp, the small-diameter guide portion 6a protruding from the front end surface of the aiming screw 6 is screwed into the self-locking nut 9 at the time of assembling the lamp unit 2. To prevent the lamp unit 2 from falling forward. However, in such an aiming screw 6, the length becomes long due to the small diameter guide portion 6a. There is a problem that the protruding nut mounting portion 11 is also long.

Accordingly, the present invention has been made in view of the above-mentioned conventional problems, and an object of the present invention is to surely prevent the lamp unit from overturning at the time of assembly, and to aim at the aiming screw. Another object of the present invention is to provide a vehicular lamp in which a nut mounting portion provided on a reflector side is shortened.

[0006]

According to the present invention, in order to achieve the above object, the tip of an aiming screw rotatably penetrating through a housing and supporting a reflector to be tiltable is screwed to a nut member provided on the reflector. And
In the nut member, an opening having a larger diameter than the aiming screw is formed at the screw side end, and a screw hole into which the aiming screw is screwed is formed at the opposite screw side end, and a gap between the opening and the screw hole is formed. Is formed with a tapered guide portion.

[0007]

In the present invention, the aiming screw is first inserted into the opening of the nut member during assembly to prevent the lamp unit from falling down by supporting the nut member, and is inserted into the tapered guide following the opening. , The axis line coincides with the axis line of the nut member and is screwed into the screw hole following the guide. Since the opening has a hole diameter larger than the outer diameter of the aiming screw, a small-diameter guide portion provided at the tip of the aiming screw becomes unnecessary.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, the present invention will be described in detail based on an embodiment shown in the drawings. FIG. 1 is a sectional view showing an embodiment of a vehicular lamp according to the present invention, FIG. 2 is a cross-sectional view of the vehicular lamp, FIG.
(A)-(e) is a partially broken front view of the self-locking nut, an enlarged view of a portion A in FIG. (A), a right side view, a left side view, and a plan view. In the drawing, the same components as those in FIG. 4 are denoted by the same reference numerals, and description thereof will be omitted. This embodiment shows an example applied to a projector type headlamp. 1 and 2, a housing 3 and a front lens 20 that hermetically covers a front opening of the housing 3 form a lamp chamber 21 in which a projector-type lamp unit 2, an inner lens 22, An extension 23 is provided.

The front lens 20 is formed of a synthetic resin or glass having excellent translucency and is formed in a shallow box shape having an open rear surface, and a lens mounting portion 25 integrally projecting from a rear opening is provided on the front surface of the housing 3. It is inserted into an annular groove 26 recessed at the opening end face, and is fixed by an adhesive 27. The front lens 20 is fixed to the housing 3 by a plurality of plate springs 28 formed in a substantially C shape.

The inner lens 22 includes a front lens 2
It is white and transparent like 0, and is disposed along the back surface of the front lens 20.

The lamp unit 2 is connected to a mounting adjustment flange 29, a reflector 4 having an inner surface forming a reflection surface 30 having a spheroidal shape, and a connecting member 31 formed of a tubular body to a front opening of the reflector 4. Support tube 3 open at both ends
2, a projection lens 34 fitted in the front opening of the support cylinder 32 and fixed by a leaf spring 33, a beam irradiation valve 35 disposed in the reflector 4, and disposed in the connecting member 31. It is composed of a shade 36 and the like, is supported at three points by the aiming mechanism 1, and is disposed so as to be adjustable in angle with respect to the housing 3. The bulb 35 is formed of a halogen bulb, and is located at the first focal point P of the reflection surface 30 of the reflector 4. The approximate center of the upper surface of the shade 36 is located at the second focal position Q of the reflector 4. The projection lens 34 is a convex lens having a convex hemispherical front surface and a flat rear surface.
Matches. The shade 36 is used to obtain desired light distribution characteristics as a headlight. By cutting a part of light emitted from the bulb 35, the lower half and the upper left part around the optical axis are bright. Light emission characteristics. Since the configuration of the projector-type lamp unit 2 is conventionally well-known, further description will be omitted.

The extension 23 is located in front of the lamp unit 2 and substantially parallel to the inner lens 22. A portion corresponding to the projection lens 34 extends rearward to extend the lower half of the projection lens 34. Semi-cylindrical part 2 to be stored
3A is formed. The semi-cylindrical portion 23A is
The light from the bulb 35 transmitted through the light source 4 is cut off toward the side to increase the amount of light in the front direction. Like the reflection surface 30 of the reflector 4, the reflection surface 37 is formed by vapor deposition of aluminum or the like. I have.

Reference numeral 38 denotes a rubber cover, and 39 denotes a valve socket.

In FIG. 3, the aiming screw 6 for tilting the lamp unit 2 in the front-rear direction with respect to the housing 3 to adjust the irradiation angle does not have the small-diameter guide portion in the conventional structure shown in FIG. It is screwed into the screw hole 10. The self-locking nut 9 is formed of a synthetic resin into a cylindrical body, and has a small-diameter portion 40 which is fitted and held in a nut adjustment hole 29 in the middle of the outer peripheral surface in a mounting adjustment flange 29 {FIGS. 1 and 3A}. A flange 41 is provided in close contact with the back surface of the mounting adjustment flange 29, and a plurality of slits 43 are formed at both ends. A claw 44 is provided continuously or intermittently over the entire circumference on the outer peripheral portion of the surface of the flange portion 41 opposite to the self-locking nut 9. The claw 44 is attached to the mounting adjustment flange 29. The engagement between the self-locking nut 9 and the mounting adjustment flange 29 is further strengthened to prevent the lamp unit 2 from vibrating. When mounting the self-locking nut 9, the reflector-side end can be easily fitted by press-fitting the reflector-side end into the nut mounting hole 46 provided in the mounting adjustment flange 29 and fitting the small-diameter portion 40 into the nut mounting hole 46. The screw hole 10 of the self-locking nut 9 is formed at an end opposite to the screw, and an opening 47 having a hole diameter larger than the outer diameter of the self-locking nut 9 is formed on the opposite side. The opening 47 and the screw hole 10 are communicated with each other by a tapered guide 48.

Thus, when the aiming screw 6 is connected to the mounting adjustment flange 29 of the lamp unit 2 by using the self-locking nut 9 having such a configuration, it is possible to prevent the lamp unit 2 from tipping over when the lamp unit 2 is assembled. it can. That is, when the aiming screw 6 is screwed and connected to the self-locking nut 9, the leading end of the aiming screw 6 is first opened.
Insert In this state, although the aiming screw 6 has not yet been screwed into the screw hole 10 of the self-locking nut 9, the self-locking nut 9 is supported by the aiming screw 6, so that the lamp unit 2 falls forward. Never. Therefore, there is no need to provide a small-diameter guide portion on the tip end surface of the aiming screw 6, and the aiming screw 6 can be shortened. When the aiming screw 6 is further pushed in, if the axis is shifted with respect to the axis of the self-locking nut 9, it is automatically centered on the tapered surface of the tapered guide portion 48. When the aiming screw 6 is rotated and screwed into the screw hole 10, the aiming screw 6 and the self-locking nut 9 can be connected.

Although the above embodiment has been described with reference to a case where the present invention is applied to a projector type headlamp, the present invention is not limited to this, and it is applicable to a general headlamp without a projection lens 34. Of course, it can be applied.

[0017]

As described above, the vehicular lamp according to the present invention has a nut member mounted on the lamp unit side, an opening having a hole diameter larger than the outer diameter of the aiming screw, and a screw hole. A tapered guide part that connects both parts is provided, and the tip of the aiming screw is inserted into the opening and screwed into the screw hole during assembly, so no small diameter guide part is provided on the tip face of the aiming screw. In both cases, the lamp unit can be prevented from falling down only by inserting the tip of the aiming screw into the opening, and the aiming screw can be shortened. Also, if a small-diameter guide is unnecessary, the length of the nut mounting portion provided on the back of the reflector can be reduced, and the tapered guide aligns the axis of the aiming screw with the axis of the nut member. The practical effect is great, for example, the screwing work of the aiming screw is easy.

[Brief description of the drawings]

FIG. 1 shows a second embodiment of a vehicle lamp according to the present invention.
It is II sectional drawing of the figure.

FIG. 2 is a cross-sectional view of the lamp.

FIGS. 3 (a) to 3 (e) are a front view partially showing a self-locking nut, an enlarged view of a portion A in FIG. 3 (a), a right side view, a left side view, and a plan view, respectively.

FIG. 4 is a sectional view of a conventional aiming mechanism.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Aiming mechanism 2 Lamp unit 3 Housing 4 Reflector 5 Rotating fulcrum 6 Aiming screw 6a Small diameter guide 9 Self-locking nut 10 Screw hole 29 Mounting adjustment flange 47 Opening 48 Tapered guide

Claims (1)

(57) [Scope of request for utility model registration] An end of an aiming screw rotatably penetrating through a housing and tiltably supporting a reflector is screwed and connected to a nut member provided on the reflector, and the nut member is connected to the screw side end by an aiming screw. An opening having a larger diameter than the screw is formed, a screw hole into which the aiming screw is screwed is formed at the end opposite to the screw, and a tapered guide is formed between the opening and the screw hole. A vehicular lamp characterized by the following.