JPH0641009U - Vehicle lighting - Google Patents

Abstract

(57) [Summary] (Correction) [Purpose] It is possible to reliably prevent the lighting unit from tipping over during assembly, and also to shorten the nut mounting parts provided on the aiming screw and reflector side. A tip of an aiming screw 6 rotatably pierced through a housing and tiltably supporting a lamp unit is screwed to a self-locking nut 9 provided on a mounting adjustment flange 29. In the self-locking nut 9, an opening 47 having a diameter larger than the outer diameter of the aiming screw 6 is formed at the screw side end portion, and a screw hole portion 10 into which the aiming screw 6 is screwed is formed at the anti-screw side end portion. A tapered guide portion 48 is formed between the opening 47 and the screw hole portion 10.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a vehicular lamp, and particularly to improvement of an aiming mechanism of a headlight.

[0002]

[Prior art]

 As is well known, a vehicle headlamp is equipped with a lamp unit composed of a reflector, a bulb, etc., which is arranged so as to be tiltable in the front-back and left-right directions with respect to the vehicle body, and is replaced during assembly and adjustment of this lamp unit. The tilting of the optical axis, in other words, the adjustment of the irradiation angle (commonly called aiming adjustment) can be performed by tilting the aiming mechanism at the time. Although various types of aiming mechanisms have been proposed in the past, the aiming mechanism 1 shown in FIG. 4 is known as the most general type. The aiming mechanism 1 supports a lamp unit 2 at three points on a housing 3 fixed to the vehicle body so that the angle of the lamp unit can be adjusted. 5 and two aiming screws 6 for rotating the reflector 4 in the front-rear and left-right directions around the rotation fulcrum portion 5. However, in the figure, only the aiming screw that rotates in the front-rear direction is shown. The rotation fulcrum shaft 5 is planted on the front surface of the housing 3 and at a position a diagonally downward right from the horizontal axis (optical axis horizontal line) and the vertical axis (optical axis vertical line) passing through the center of the headlight. The spherical head 5A provided at the tip is slidably fitted and connected to the spherical seat 7A of the cylindrical bearing 7 attached to the rear surface of the reflector 4, and the spherical head 5A has a spherical shape. The heart forms the center of rotation 0 of the lamp unit 2. The aiming screw 6 is rotatably disposed through an insertion hole 8 provided on the upper left side of the rear surface of the housing 3, and has a front end attached to a self-locking nut (nut member) 9 attached to the upper rear surface of the reflector 4. It is screwed and connected to the screw hole portion 10. The aiming screw 6 can be tilted by a small angle and is prevented from moving in the axial direction, and a small-diameter guide portion 6a having an appropriate length is integrally provided on the tip end surface thereof. The small-diameter guide portion 6a is inserted into the screw hole portion 10 of the 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 will fall forward unless the aiming screw 6 is screwed and connected to the self-locking nut 9. Therefore, if the aiming screw 6 is screwed onto the self-locking nut 9 while the small diameter guide portion 6a is inserted into the screw hole portion 10 of the self-locking nut 9 and the lamp unit 2 is temporarily supported, the lamp unit 2 is prevented from falling. can do.

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

[0004]

[Problems to be solved by the device]

 As described above, in the conventional vehicular lamp, the small-diameter guide portion 6a protruding from the tip surface of the aiming screw 6 is inserted into the screw hole portion 10 of the self-locking nut 9 when the lamp unit 2 is assembled. This is to prevent it from falling forward, but in such an aiming screw 6, the length is long due to the small diameter guide portion 6a, and the nut mounting protruding from the rear surface of the reflector 2 is used. There was a problem that part 11 would also become long.

Therefore, the present invention has been made in view of the above-described conventional problems, and an object thereof is to reliably prevent the lamp unit from tipping over during assembly, and to aim at the aiming screw. Another object of the present invention is to provide a vehicular lamp in which the nut mounting portion provided on the reflector side is shortened.

[0006]

[Means for Solving the Problems]

 In order to achieve the above object, the present invention comprises an aiming screw, which is rotatably pierced through a housing and rotatably supports a reflector, is screwed and connected to a nut member provided on the reflector. An opening with a diameter larger than that of the aiming screw is formed at the end on the screw side, and a screw hole for screwing the aiming screw is formed at the end on the side opposite to the screw, and a taper shape is formed between the opening and the screw hole. The guide portion is formed.

[0007]

[Action]

 In the present invention, the aiming screw is first inserted into the opening of the nut member at the time of assembly to prevent the lamp unit from collapsing by supporting the nut member, and the aiming screw is inserted into the tapered guide part following the opening part to thereby prevent the axis line. Is aligned with the axis of the nut member and is screwed into the screw hole that follows the guide. Since the opening has a hole diameter larger than the outer diameter of the aiming screw, the small-diameter guide portion provided at the tip of the aiming screw becomes unnecessary.

[0008]

【Example】

 Hereinafter, the present invention will be described in detail with reference to the embodiments shown in the drawings. 1 is a cross-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, and FIGS. 3A to 3E are partially cutaway front views of a self-locking nut. a) An enlarged view of part A of the drawing, a right side view, a left side view, and a plan view. In the figure, the same components as those in FIG. 4 are designated by the same reference numerals, and the description thereof will be omitted. This embodiment shows an example applied to a projector-type headlight. 1 and 2, the housing 3 and the front lens 20 that hermetically covers the front opening of the housing 3 form a lamp chamber 21. In the lamp chamber 21, a projector-type lamp unit 2, an inner lens 22 and The extension 23 is provided.

The front lens 20 is formed of a synthetic resin or glass having excellent translucency in a shallow box shape whose rear side is open, and a lens mounting portion 25 integrally protruding from the rear opening has a front surface of the housing 3. It is inserted into an annular groove 26 recessed in the opening end face and 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 is white and transparent like the front lens 20, and is arranged along the back surface of the front lens 20.

The lamp unit 2 includes a mounting adjustment flange 29, a reflector 4 having an inner surface forming a spheroidal reflecting surface 30, and a connecting member 31 formed of a tubular body at the front opening of the reflector 4. A support tube 32 connected to both ends, a projection lens 34 fitted in the front opening of the support tube 32 and fixed by a leaf spring 33, a beam irradiation valve 35 arranged in the reflector 4, and a connection. It is composed of a shade 36 and the like arranged in the member 31, is supported by the aiming mechanism 1 at three points, and is arranged so that the angle can be adjusted with respect to the housing 3. The bulb 35 is a halogen bulb and is located at the first focal point P of the reflecting surface 30 of the reflector 4. At the second focus position Q of the reflector 4, the center of the upper surface of the shade 36 is positioned. The projection lens 34 is composed of a convex lens having a convex hemispherical front surface and a flat rear surface, and its focal point coincides with the second focal point Q of the reflecting surface 30. The shade 36 is to obtain a desired light distribution characteristic as a headlight, and by cutting a part of the light emitted from the bulb 35, the lower half and the upper left part are centered around the optical axis. Use bright light emission characteristics. Since the configuration of the projector type lighting unit 2 is well known in the art, further description will be omitted.

The extension 23 is disposed in front of the lamp unit 2 and substantially in parallel with the inner lens 22, and a portion corresponding to the projection lens 34 extends rearward so that a lower half of the projection lens 34 is provided. To form a semi-cylindrical portion 23A. The semi-cylindrical portion 23A cuts out the light from the bulb 35 that has passed through the projection lens 34 toward the side and increases the amount of light in the forward direction. Like the reflecting surface 30 of the reflector 4, the semi-cylindrical portion 23A is formed by vapor deposition of aluminum. The reflecting surface 37 is formed by the above.

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

In FIG. 3, the aiming screw 6 for adjusting the irradiation angle by tilting the lamp unit 2 in the front-back direction with respect to the housing 3 does not include the small-diameter guide portion in the conventional structure shown in FIG. Is screwed into the screw hole portion 10. The self-locking nut 9 is formed of a synthetic resin into a cylindrical body, and has a small diameter portion 40 that is fitted and retained in a nut mounting hole 40 of a mounting adjustment flange 29 (FIGS. 1 and 3 (a)) at a middle portion of an outer peripheral surface. A flange 41 is provided which is in close contact with the back surface of the attachment adjusting flange 29, and a plurality of slits 43 are formed at both ends. A claw 44 is continuously or intermittently projected over the entire circumference on the outer peripheral portion of the surface of the collar portion 41 opposite to the self-locking nut 9, and the claw 44 is attached to the mounting adjustment flange 29. By making it bite, the coupling between the self-locking nut 9 and the mounting adjustment flange 29 is made stronger to prevent vibration of the lamp unit 2. When mounting the self-locking nut 9, the end portion on the reflector side is press-fitted into the nut mounting hole 46 provided in the mounting adjustment flange 29 and the small diameter portion 40 is fitted into the nut mounting hole 46, whereby the self-locking nut 9 can be easily mounted. The screw hole portion 10 of the self-locking nut 9 is formed at the end portion on the side opposite to the screw, and on the opposite side, an opening portion 47 having a hole diameter larger than the outer diameter of the self-locking nut 9 is formed. The opening 47 and the screw hole portion 10 are communicated with each other by a tapered guide portion 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 structure, the lamp unit 2 can be prevented from tipping over when the lamp unit 2 is assembled. You can That is, when screwing the aiming screw 6 into the self-locking nut 9, the tip of the aiming screw 6 is first inserted into the opening 47. In this state, the aiming screw 6 is not yet screwed into the screw hole portion 10 of the self-locking nut 9, but since the aiming screw 6 supports the self-locking nut 9, the lamp unit 2 moves forward. There is no fall. Therefore, it is not necessary to provide a small-diameter guide portion on the tip surface of the aiming screw 6, and the aiming screw 6 can be shortened. Further, when the aiming screw 6 is pushed in and the shaft center deviates from the shaft center of the self-locking nut 9, the taper guide portion 48 is automatically centered by hitting the tapered surface. Then, by rotating the aiming screw 6 and screwing it into the screw hole portion 10, the aiming screw 6 and the self-locking nut 9 can be connected.

Although the above embodiment has been described with respect to the case of being applied to a projector-type headlight, the present invention is not limited to this, and is also applicable to a general headlight without the projection lens 34. Of course, it can be applied.

[0017]

[Effect of device]

 As described above, in the vehicular lamp according to the present invention, the nut member attached to the lamp unit side has the opening portion having the hole diameter larger than the outer diameter of the aiming screw, the screw hole portion, and these both portions communicate with each other. Since a taper guide part is provided and the tip of the aiming screw is inserted into the opening and screwed into the screw hole when assembling, aiming screw does not need to be provided on the tip surface of the aiming screw. It is possible to prevent the lamp unit from falling over by simply inserting the tip of the screw into the opening, and it is possible to shorten the aiming screw. Also, if a small diameter guide is not needed, the length of the nut mounting part provided on the back of the reflector can be shortened, and the tapered guide part makes the axis of the aiming screw coincide with the axis of the nut member. Therefore, the screwing work of the aiming screw is easy, and its practical effects are great.

[Brief description of drawings]

FIG. 1 shows a second embodiment of a vehicular lamp according to the present invention.
It is the II sectional view taken on the line of FIG.

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

3 (a) to 3 (e) are a partial determination front view of a self-locking nut, an enlarged view of part A of 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]

 1 Aiming Mechanism 2 Lamp Unit 3 Housing 4 Reflector 5 Rotating Support Shaft 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)

[Scope of utility model registration request] 1. A tip of an aiming screw rotatably pierced through a housing and rotatably supporting a reflector is screwed and connected to a nut member provided on the reflector, and the nut member is aimed at the screw side end portion. An opening having a diameter larger than that of the screw is formed, a screw hole portion with which the aiming screw is screwed is formed at an end portion on the side opposite to the screw, and a tapered guide portion is formed between the opening portion and the screw hole portion. A vehicle lamp characterized by the above.