JPH0534602U - Vehicle headlights - Google Patents

Abstract

(57) [Abstract] [Purpose] In the aiming mechanism, even if the screwing of the aiming screw and the nut is disengaged, if the aiming screw is screwed in, it can easily return to the screwed state. [Structure] Just before the aiming screw 19 and the nut 23 are unscrewed, the tilting end of the reflecting mirror 5 is moved to the lamp body 2
So that it contacts the inner surface of.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 In the present invention, when the aiming adjustment is performed, the aiming screw is excessively screwed back against the nut to make adjustment impossible, or the tilting member comes into contact with the fixed side member and one or both of them is deformed. Another object of the present invention is to provide a new vehicle headlight that can prevent an accident such as cracking.

[0002]

[Prior Art]

 Since it is necessary to change the irradiation direction of the vehicle headlamp, the tilting member is supported on the fixed side member at three positions, and two of them are provided with so-called aiming mechanisms.

In the aiming mechanism, an aiming screw rotatably supported by a fixed member is screwed into a nut supported by a tilting member, and the aiming screw is screwed into or unscrewed from the nut to move the tilting member. The supported point (nut) is moved in the front-rear direction, whereby the tilting member is tilted with respect to the fixed member.

FIGS. 6 and 7 show an example a of a vehicle headlamp in which a reflecting mirror is tiltably arranged as a tilting member in a lamp space defined by a lamp body and a lens.

Reference numeral b denotes a lamp body made of synthetic resin, which has a recess c opened at the front surface, and a lens d is attached to the lamp body b so as to cover the front surface of the recess c.

Reference numeral e denotes a reflecting mirror that is tiltably arranged in a lamp space f defined by a lamp body b and a lens d.

The reflector e is supported by the lamp body b at three points A, B, and C when viewed from the front.

At the point A, the reflecting mirror e is supported on the lamp body b by the rotation fulcrum mechanism g. The rotation fulcrum mechanism g is composed of a fulcrum shaft implanted in the lamp body b and a ball receiving member supported by the reflecting mirror e.

Reference numeral h denotes a fulcrum shaft, a spherical portion i is integrally formed at the front end, and a screw shaft portion j at the rear half portion is screwed to a boss seat k formed on the inner surface of the ramp body b.

Reference numeral 1 denotes a ball receiving member supported by the reflecting mirror e, which has a spherical recess m opened on the rear surface.

The sphere portion i of the fulcrum shaft h is rotatably fitted in the spherical recess m of the sphere receiving member l, and the reflecting mirror e is rotatably connected to the lamp body b.

At points B and C, the reflecting mirror e is connected to the lamp body b by aiming adjustment mechanisms n, n (only the aiming adjustment mechanism n at point B is shown in the drawing). The aiming adjusting mechanisms n, n are composed of an aiming screw rotatably supported by the lamp body b and a nut supported by the reflecting mirror e.

Reference numeral o denotes an aiming screw, which is rotatably supported by the lamp body b at a position near the head p, and a portion beyond the support is a screw shaft portion q. The head p projects to the rear side of the lamp body b.

Reference numeral r denotes a nut supported by the reflecting mirror e, and the screw shaft portion q of the aiming screw o is screwed to the nut r.

Then, when the aiming screw o at any one of the points B and C is rotated, the screw shaft portion q of the aiming screw o with respect to the nut r is rotated in accordance with the direction of the rotation. Is twisted or untwisted to change the distance between the reflector e and the lamp body b at the point (B or C), which causes the reflector e to move to another point (C or B). Is tilted about a line connecting the point A and the point A.

[0016]

[Problems to be solved by the device]

 In the conventional vehicle headlamp a as described above, when the aiming adjustment is performed by rotating the aiming screw q in the unwinding direction, the aiming screw q and the nut deviate from the adjustment range. The screw with r may come off. In such a case, even if the aiming screw q is rotated in the direction in which it is screwed into the nut r to return to the screwed state, there is no force for biasing the nut r in the direction in which it is screwed with the aiming screw q. There is a problem that they cannot be screwed together.

Further, in order to avoid such a problem, it is conceivable to narrow the gap between the two so that the tilting end of the reflecting mirror e collides with the lamp body b when the reflecting mirror e is tilted.

However, if the distance between the tilted end of the reflecting mirror e and the lamp body b is narrowed, the reflecting mirror e hits the lamp body b when the aiming screw q is rotated in a direction to be screwed back with respect to the nut r. Even if the aiming screw q is rotated, the aiming screw q may be further rotated. In such a case, a new accident may occur in which the lamp body b and / or the reflecting mirror e at the collision part is deformed or cracked. Occurs.

[0019]

[Means for Solving the Problems]

 Therefore, in order to solve the above problems, the vehicle headlamp of the present invention can adjust the distance between the fixed member and two of the three connecting points of the tilting member and the fixed member. The aiming mechanism is composed of an aiming screw and a nut, and tilts immediately before the aiming screw and nut are unscrewed when at least one aiming screw of the aiming mechanism is rotated in the direction of unscrewing from the nut. The tilting end of the member contacts the fixed member.

[0020]

[Action]

 Therefore, according to the vehicle headlamp of the present invention, the tilting end of the tilting member abuts on the fixed side member immediately before the nut is unscrewed when the aiming screw is rotated in the direction to be untwisted. Therefore, even if the screwing of the aiming screw and the nut is disengaged, the nut is elastically abutted on the tip of the aiming screw by the elastic force of either or both of the contact between the tilting member and the fixed side member. Then, the aiming screw and the nut can be returned to the screwed state only by rotating the aiming screw in the screwing direction.

Further, since the contact between the tilting member and the fixed member is performed immediately before the aiming screw and the nut are unscrewed, even if the aiming screw is unscrewed back too much, the tilting member and the fixed member Since the and are not pressed against each other more than necessary, it is possible to prevent an accident that both members are deformed or cracked.

[0022]

【Example】

 The details of the vehicle headlight according to the present invention will be described below with reference to the embodiments shown in the accompanying drawings.

Reference numeral 1 in the drawing denotes a vehicle headlight.

Reference numeral 2 denotes a lamp body made of synthetic resin, which has a concave portion 3 which is open toward the front.

Reference numeral 4 denotes a lens made of a transparent material, such as glass or transparent synthetic resin, which is attached to the lamp body 2 so as to cover its front opening.

Reference numeral 5 denotes a reflecting mirror that is tiltably arranged with respect to the lamp body 2 in a lamp space 6 defined by the lamp body 2 and the lens 4, and this reflecting mirror 5 serves as a tilting member.

The reflecting mirror 5 is made of synthetic resin and has a concave portion 7 that is open to the front surface, and the inner surface of the concave portion 7 serves as a reflecting surface.

The shape of the opening edge of the reflecting mirror 5 is substantially similar to the shape of the opening edge of the lamp body 2, and is formed to be slightly smaller.

Reference numeral 8 denotes a light bulb, which is supported by the reflecting mirror 5.

The reflector 5 is connected to the lamp body 2 at three points 9, 10, 11.

These points 9, 10 and 11 are located at the bent point (9), the lower end (10) and the left end (11) of the left sideways inverted L shape when viewed from the front. The connecting point 9 is composed of a turning fulcrum mechanism, and the connecting points 10 and 11 are composed of an aiming mechanism.

Reference numeral 12 is a rotation fulcrum mechanism. Reference numeral 13 denotes a fulcrum shaft whose rear end is fixed to the lamp body 2, and a sphere 14 is integrally formed at its front end.

Reference numeral 15 is a mounting portion integrally formed at a position corresponding to the connecting point 9 of the reflecting mirror 5, and a receiving body 16 made of synthetic resin is supported by the mounting portion 15. A spherical concave portion 17 having an opening on the rear surface is formed in the receiving body 16, and the spherical body 14 of the fulcrum shaft 13 is rotatably fitted in the spherical concave portion 17 to form a rotation fulcrum mechanism. 12 are formed.

Reference numeral 18 is an aiming mechanism at the connection point 10. The aiming mechanism at the connection point 11 has the same structure as the aiming mechanism 18.

Reference numeral 19 denotes an aiming screw, which is axially extended in the front-rear direction and has an intermediate portion rotatably supported by the rear wall of the lamp body 2, and the front half 20 of the aiming screw 19 is It is a screw shaft.

Further, the length of the screw shaft portion 20 of the aiming screw 19 is formed to be slightly longer than the distance in which the connecting points 10 and 11 move in the front-rear direction within the tilting permissible range of the reflecting mirror 5.

Reference numeral 21 is a boss portion integrally formed on the rear surface of the reflecting mirror 5 at a position corresponding to the connecting point 10 (11).

Reference numeral 22 denotes a mounting plate screwed to the boss portion 21, and a mounting hole 22a having a rectangular shape when viewed from the front-rear direction is formed in the lower portion thereof.

Reference numeral 23 denotes a synthetic resin nut, which is non-rotatably supported in the mounting hole 22a of the mounting plate 22 and has its screw hole 23a oriented in the front-rear direction.

Then, the screw shaft portion 20 of the aiming screw 19 is screwed into the nut 23 supported on the rear surface of the reflecting mirror 5 via the mounting plate 22, and the aiming mechanism 18 is formed.

In the aiming mechanism 18, when the aiming screw 19 is rotated, the screw shaft portion 20 of the aiming screw 19 is screwed into or unscrewed from the nut 23 according to the direction of rotation.

The aiming screw 19 is rotatable with respect to the lamp body 2, but is not movable in the axial direction, so that the nut 23 is attached to the aiming screw 19 by the rotation of the aiming screw 19. It will move backward or forward along.

Thus, the reflecting mirror 5 is tiltably supported with respect to the lamp body 2 by the one turning fulcrum mechanism 12 and the two aiming mechanisms 18, 18, and the optical axis of the reflecting mirror 5 is provided in front of the vehicle. The opening edge of the reflecting mirror 5 is positioned close to the inner surface of the lamp body 2 with a certain distance in a state substantially coincident with the facing direction of the lamp 1.

Then, by screwing or unscrewing the aiming screw 19 at the connection point 10 (lower end), the reflecting mirror 5 is tilted with the line connecting the connection points 9 and 11 as the tilt axis, and By screwing in or unscrewing the aiming screw 19 at the connecting point 11 (left end), the reflecting mirror 5 is tilted with the line connecting the connecting points 9 and 10 as the tilt axis.

Further, immediately before the aiming screw 19 is unscrewed and screwed with the nut 23 is disengaged (for example, the tilting angle of the reflecting mirror 5 is 1 to 1.5 degrees before), the opening edge of the reflecting mirror 5 is removed. Of the tilting end 5a (for example, when the aiming screw 19 of the vertical aiming mechanism 18 (of the connecting point 10 (lower end)) is unscrewed back, the outside of the lamp body 2 is the outside). It is designed to come into contact with the inner surface.

When the aiming screw 19 is further unscrewed from the state where the reflecting mirror 5 is in contact with the lamp body 2, the aiming screw 19 is disengaged from the nut 23 and the reflecting mirror 5 tilts. Since the end 5a is elastically contacted with the inner surface of the lamp body 2, the nut 23 is not screwed to the tip of the aiming screw 19, but the rear end edge of the screw hole 23a is elastically contacted. ..

In this state, even if the aiming screw 19 is rotated in a direction to be untwisted, the nut 23 is not screwed, so that the reflecting mirror 5 is not tilted only by idling.

Further, since the rear end edge of the screw hole 23a of the nut 23 for rotating the aiming screw 19 in the screwing direction in this state is elastically contacted with the tip end portion of the aiming screw 19, the aiming screw 19 is It is easily screwed into 23 and they are screwed together.

If a shaft portion 19a having a diameter smaller than the root diameter of the screw shaft portion 20 and having no spiral groove is formed at the tip end portion of the aiming screw 19 (see FIG. 5), the nut 23 and the aiming screw 19 are formed. Even if the screw and the screw are disengaged from each other, the disengagement of the both can be surely avoided, and if the aiming screw 19 is rotated in the screwing direction, the both can be surely screwed.

[0050]

[Effect of the device]

 As is clear from the above description, the vehicle headlamp of the present invention is a vehicle headlamp in which a tilting member that is tilted when the irradiation direction is changed is connected to the fixed side member at three positions. Therefore, two of the above three points are connected by an aiming mechanism that can adjust the distance between the tilting member and the fixed side member, and the aiming mechanism consists of an aiming screw and a nut. It is characterized in that the tilting end of the tilting member comes into contact with the fixed member immediately before the aiming screw and the nut are unscrewed when the aiming screw is rotated in the direction to be unscrewed from the nut.

Therefore, according to the vehicle headlamp of the present invention, the tilting end portion of the tilting member contacts the fixed side member immediately before the screwing with the nut is disengaged when the aiming screw is rotated in the direction for untwisting. Since the nuts come into contact with each other, even if the screwing of the aiming screw and the nut is disengaged, the nut is elastically attached to the tip of the aiming screw by the elastic force of either or both of the tilting member and the fixed member. Then, the aiming screw and the nut can be returned to the screwed state by simply rotating the aiming screw in the direction of screwing.

Further, since the contact between the tilting member and the fixed-side member is performed immediately before the aiming screw and the nut are unscrewed, even if the aiming screw is unscrewed back too much, the tilting member and the fixed-side member are Since the and are not pressed against each other more than necessary, it is possible to prevent an accident that both members are deformed or cracked.

The specific shapes and structures shown in the above embodiments are merely examples for implementing the vehicle headlight of the present invention. The range should not be construed as limiting.

[Brief description of drawings]

FIG. 1 is a front view showing an example of implementation of a vehicle headlight according to the present invention.

FIG. 2 is a sectional view taken along line II-II in FIG.

FIG. 3 is an enlarged cross-sectional view of an essential part showing a state in which a tilting end of a tilting member is in contact with a fixed member.

FIG. 4 is an enlarged cross-sectional view of an essential part showing a state in which the aiming screw and the nut are unscrewed.

FIG. 5 is an enlarged sectional view showing a modified example of the aiming screw.

FIG. 6 is a front view showing an example of a conventional vehicle headlamp.

7 is a sectional view taken along the line VII-VII in FIG.

[Explanation of symbols]

 1 Vehicle headlamp 2 Fixed member 5 Tilt member 5a Tilt end 9 Connection point 10 Connection point 11 Connection point 18 Aiming mechanism 19 Aiming screw 23 Nut

Claims (1)

[Scope of utility model registration request] 1. A headlight for a vehicle, wherein a tilting member tilted when changing an irradiation direction is connected to a fixed member at three points, and two of the three points are fixed to the tilting member. Connected by an aiming mechanism that can adjust the spacing between the side members, the aiming mechanism consists of an aiming screw and a nut, and at least the aiming screw of the aiming screw of one aiming mechanism and the aiming screw when rotated in the direction to untwist from the nut. A vehicle headlamp, wherein the tilting end of the tilting member is brought into contact with the fixed-side member immediately before being unscrewed from the nut.