JP2528745Y2 - Vehicle headlights - Google Patents

Description

[Detailed description of the invention]

[0001]

In the present invention, when the aiming adjustment is performed, the aiming screw cannot be adjusted because the aiming screw is unscrewed too much with respect to the nut, or the tilting member comes into contact with the fixed side member. Another object of the present invention is to provide a novel vehicle headlamp capable of preventing an accident in which both or both are deformed or cracked.

[0002]

2. Description of the Related Art In order to change the irradiation direction of a vehicle headlamp, a tilting member is supported on a fixed member at three places, and two of them are provided with a so-called aiming mechanism.

The aiming mechanism is configured such that 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 or unscrewed back from the nut to rotate 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-side member.

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

[0005] Reference numeral b denotes a synthetic resin lamp body having a concave portion c opened on the front surface, and a lens d is attached to the lamp body b so as to cover the front surface of the concave portion c.

Reference numeral e denotes a reflecting mirror which is tiltably disposed 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 as 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 turning 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 ball portion i is integrally formed at the front end, and a screw shaft portion j at the rear half is screwed to a boss seat k formed on the inner surface of the lamp body b.

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

Then, the spherical portion i of the fulcrum shaft h is rotatably fitted into the spherical concave portion m of the ball receiving member l, and here 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 and n (only the aiming adjustment mechanism n at point B is shown in the drawing). The aiming adjustment mechanisms n, n comprise an aiming screw rotatably supported by the lamp body b and a nut supported by the reflector e.

O is an aiming screw having a head p
It is rotatably supported by the lamp body b at a position closer thereto, and a portion ahead of the support portion is a screw shaft portion q. And
The head p projects to the rear of the lamp body b.

R is a nut supported by the reflecting mirror e;
The nut r is attached to the screw shaft q of the aiming screw o.
Is screwed.

When the aiming screw o at one of the points B and C is rotated, the screw shaft portion q of the aiming screw o is changed according to the direction of the rotation.
Is screwed into or unscrewed from the nut r to change the distance between the reflector e and the lamp body b at the point (B or C), so that the mirror e is moved to another point. (C
Or, it is tilted with the line connecting B) and point A as the tilt axis.

[0016]

In the conventional vehicle headlamp a as described above, when the aiming adjustment is performed by rotating the aiming screw q in the direction in which the aiming screw q is unscrewed, the range of the adjustment is reduced. The screwing between the aiming screw q and the nut r may come off. In such a case, even if the aiming screw q is rotated in a direction to be screwed into the nut r to return to the screwed state,
Since there is no force for urging the nut r in the direction of screwing with the aiming screw q, there is a problem that the nut r cannot be screwed.

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

However, if the distance between the tilting end of the reflector e and the lamp body b is reduced, the reflector e will hit the lamp body b when the aiming screw q is rotated in the direction of unscrewing the nut r. In some cases, the aiming screw q may be further rotated in spite of the fact that the lamp body b and / or the reflecting mirror e at the collision portion is deformed or cracked.

[0019]

In order to solve the above-mentioned problems, the vehicle headlamp according to the present invention has two of the three connecting points of the tilting member and the fixed side member. Connected by an aiming mechanism that can adjust the interval between
The aiming mechanism consists of an aiming screw and a nut, and when the aiming screw of at least one of the aiming mechanisms is rotated back in the direction of unscrewing from the nut, the tilting end of the tilting member immediately before the screwing of the aiming screw and the nut comes off is fixed. It comes into contact with the member.

[0020]

Therefore, according to the vehicle headlamp of the present invention, when the aiming screw is rotated in the unscrew direction, the tilting end of the tilting member comes into contact with the fixed side member immediately before the screwing with the nut is released. Therefore, even if the screw between the aiming screw and the nut is disengaged, the nut resiliently contacts the tip of the aiming screw due to one or both resiliences generated by 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 side member is made immediately before the screwing of the aiming screw and the nut is released, even if the aiming screw is unscrewed excessively, the tilting member and the fixed side member will not contact each other. Is not pressed more than necessary, so that it is possible to prevent an accident that both members are deformed or cracked.

[0022]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The details of the vehicle headlamp according to the present invention will be described below with reference to the accompanying drawings.

In FIG. 1, reference numeral 1 denotes a vehicle headlamp.

Reference numeral 2 denotes a lamp body made of a synthetic resin, and has a concave portion 3 opened forward.

Reference numeral 4 denotes a lens formed of a transparent material, for example, glass, transparent synthetic resin, or the like.
To cover the front opening.

A reflecting mirror 5 is disposed in a lamp space 6 defined by the lamp body 2 and the lens 4 so as to be tiltable with respect to the lamp body 2, and the reflecting mirror 5 serves as a tilting member.

The reflecting mirror 5 is made of synthetic resin and has a concave portion 7 opened on the front surface, and the inner surface of the concave portion 7 is 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 slightly smaller.

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

The reflector 5 has three points 9 on the lamp body 2.
10 and 11 are connected.

These points 9, 10 and 11 are, as viewed from the front, a bent point (9), a lower end (10) and a left end (1
It is located in 1). The connection point 9 is constituted by a rotation fulcrum mechanism, and the connection points 10 and 11 are constituted by an aiming mechanism.

Reference numeral 12 denotes 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 denotes a mounting portion integrally formed at a position corresponding to the connection point 9 of the reflecting mirror 5, and a support 16 made of synthetic resin is supported by the mounting portion 15. The receiving body 16 is formed with a spherical concave portion 17 opened on the rear surface. The spherical body 14 of the fulcrum shaft 13 is rotatably fitted in the spherical concave portion 17, and the rotation fulcrum mechanism 12 is rotated. It is formed.

Reference numeral 18 denotes 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.

Numeral 19 denotes an aiming screw having an intermediate portion rotatably supported by the rear wall of the lamp body 2 in a posture in which the axial direction extends in the front-rear direction, and a front half 20 of the aiming screw 19 being a screw. It is a shaft.

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 in the tilting allowable range of the reflecting mirror 5.

Reference numeral 21 denotes the connection point 10 on the rear surface of the reflecting mirror 5.
It is a boss part integrally protruded at a position corresponding to (11).

Reference numeral 22 denotes a mounting plate screwed to the boss 21. A mounting hole 22a having a rectangular shape as viewed from the front and rear is formed at a lower portion of the mounting plate.

Numeral 23 denotes a synthetic resin nut, which is supported by the mounting hole 22a of the mounting plate 22 in a non-rotatable state.
The screw holes 23a are oriented in the front-rear direction.

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

In the aiming mechanism 18, when the aiming screw 19 is rotated, the screw shaft portion 20 of the aiming screw 19 is turned into the nut 2 according to the direction of the rotation.
3 is screwed or unscrewed.

Although the aiming screw 19 is rotatable with respect to the lamp body 2 but cannot move in the axial direction, the nut 23 is moved rearward along the aiming screw 19 by the rotation of the aiming screw 19. Or they will move forward.

The reflecting mirror 5 is supported by one rotating fulcrum mechanism 12 and two aiming mechanisms 18, 18 so as to be tiltable with respect to the lamp body 2.
In a state where the optical axis of the reflector 5 substantially coincides with the direction directly facing the vehicle headlamp 1, the opening edge of the reflecting mirror 5 is located in a state of approaching the inner surface of the lamp body 2 at a certain interval.

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

Immediately before the aiming screw 19 is unscrewed and disengaged from the nut 23 (for example, 1 to 1.5 degrees before the tilt angle of the reflecting mirror 5), the opening edge of the reflecting mirror 5 is formed. The tilting end 5a (for example, the vertical aiming mechanism 1)
When the aiming screw 19 at the connection point 10 (lower end) is unscrewed, the outer side of the opening edge of the reflecting mirror 5 is in contact with the inner surface of the lamp body 2.

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 tilting end 5 a of the reflecting mirror 5. Is the lamp body 2
The nut 23 is not screwed to the tip of the aiming screw 19, but the rear end of the screw hole 23a is elastically contacted with the aiming screw 19.

In this state, even if the aiming screw 19 is rotated in the unscrewing direction, the nut 23 is not screwed, so that the reflecting mirror 5 is not tilted because it only idles.

In this state, the rear end of the screw hole 23a of the nut 23 for rotating the aiming screw 19 in the screwing direction is in elastic contact with the tip of the aiming screw 19. And the two are screwed together.

The shaft portion 19 having a diameter smaller than the root diameter of the screw shaft portion 20 and having no screw groove is provided at the tip of the aiming screw 19.
If a is formed (see FIG. 5), even if the nut 23 and the aiming screw 19 are disengaged from each other, the nut 23 and the aiming screw 19 can be surely prevented from coming off, and the aiming screw 19 can be rotated in the screwing direction. If this is the case, both can be securely screwed together.

[0050]

As is apparent from the above description, the vehicle headlamp of the present invention has a vehicle in which a tilting member that is tilted when the irradiation direction is changed is connected to the fixed member at three places. A headlamp for use, wherein two of the above three locations are connected by an aiming mechanism capable of adjusting the distance between the tilting member and the fixed side member, and the aiming mechanism comprises an aiming screw and a nut. When the aiming screw of the aiming mechanism is rotated in the direction of unscrewing from the nut, the tilting end of the tilting member is brought into contact with the fixed member immediately before the screwing of the aiming screw and the nut is released.

Therefore, according to the vehicle headlamp of the present invention, when the aiming screw is rotated in the unscrewing direction, the tilting end of the tilting member comes into contact with the fixed side member immediately before the nut is disengaged from the nut. Therefore, even if the screw between the aiming screw and the nut is disengaged, the nut resiliently contacts the tip of the aiming screw due to one or both resiliences generated by 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 made immediately before the screwing of the aiming screw and the nut is released, even if the aiming screw is unscrewed excessively, the tilting member and the fixed member are fixed. Is not pressed more than necessary, so that it is possible to prevent an accident that both members are deformed or cracked.

It should be noted that the specific shapes and structures shown in the above embodiments are only examples of the implementation of the vehicle headlamp according to the present invention, and the technical scope of the present invention is thereby described. Should not be interpreted restrictively.

[Brief description of the drawings]

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

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

FIG. 3 is an enlarged sectional view of a main part showing a state where a tilting end of the tilting member is in contact with a fixed-side member.

FIG. 4 is an enlarged cross-sectional view of a main part showing a state in which the screwing between the aiming screw and the nut is released.

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

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

FIG. 7 is a sectional view taken along the line VII-VII in FIG. 6;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Vehicle headlight 2 Fixed side 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)

(57) [Scope of request for utility model registration] 1. A vehicular headlamp in which a tilting member that is tilted when the irradiation direction is changed is connected to a fixed side member at three locations, two of the three locations being fixed to the tilting member. Connected by an aiming mechanism that can adjust the distance between the side members, the aiming mechanism consists of an aiming screw and a nut, and when the aiming screw of at least one aiming mechanism is rotated in the direction to unscrew from the nut, the aiming screw and A headlight for a vehicle, wherein a tilting end of a tilting member is brought into contact with a fixed-side member immediately before a screw engagement with a nut is released.