JP3120845B2 - Vehicle headlights - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a headlamp for a vehicle, and more particularly, to a passing light distribution and a traveling light distribution in which a range of light from one light source reaching a reflector is changed by a movable hood. And vice versa.

[0002]

2. Description of the Related Art FIG. 4 shows an example of the configuration of a conventional vehicle headlamp 90 of this type. On the other hand, the fixed hood is provided mainly for the purpose of preventing the light from the light source 91 from being directly radiated to the outside and becoming dazzling light.

On the other hand, the movable hood 93 is provided mainly for the purpose of switching the light distribution shape. When the movable hood 93 is at the passing position S, it covers a part of the upper half of the reflecting mirror 94, and the traveling position M , The light from the light source 91 reaches the entire surface of the substantially upper half of the reflecting mirror. The lower half of the reflecting mirror 94 is always covered with a fixed hood 92.

[0004] Therefore, when the movable hood 93 is in the passing position S and the traveling position M on the reflecting mirror 94, the range of light A1 reaches and when the movable hood 93 is in the traveling position M. Only the position A2 where light reaches is generated, so that a reflection surface forming a passing light distribution is formed in the range A1, and a reflection surface forming a traveling light distribution is formed in the range A2.

[0005] By doing so, the vehicle headlight 90
When the movable hood 93 is at the passing position S, passing light distribution is obtained by reflected light from the range A1, and when the movable hood 93 is at the traveling position M, reflected light from the range A1 and reflected light from the range A2 are generated. The running light distribution is obtained by the addition.

At this time, a solenoid 95 is connected to the movable hood 93, and by driving the solenoid 95, the movable hood 93 moves from the passing position S to the traveling position M. Movable hood 9
3 is provided with a return spring 96, which returns from the traveling position M to the passing position S when the driving of the solenoid 95 is stopped.

[0007]

However, in the vehicular headlamp 90 having the above-described structure, the operation of moving the movable hood 93 is performed by an arc movement by the shaft 93a, and the solenoid 95 for driving the same is driven by the shaft 93a. Is a linear motion. For example, as shown in FIG. 4, the end portion 93b of the movable hood 93 is hooked by a substantially L-shaped hook 95b attached to a plunger 95a of the solenoid 95, and pulled.
It is inevitable to adopt a configuration in which the position difference caused by the movement is absorbed by sliding.

Thus, the movable hood 93 and the solenoid 95
Is extremely vague, resulting in a lack of accuracy. In addition, when the two slide, an operation failure such as catching occurs, and both accuracy and reliability are impaired. Also, in addition to the movable hood 93
When the solenoid 95 is employed for driving the motor, a problem that the operation sound of the solenoid 95 is large and the sense of quality is impaired also occurs.

[0009]

According to the present invention, as a specific means for solving the above-mentioned conventional problems, a fixed hood, a movable hood, and a solenoid are provided on a light source, and the movable hood is rotated by a solenoid. By varying the range of the light from the light source reaching the reflecting mirror to switch between passing light distribution and traveling light distribution, the plunger of the solenoid and the movable hood are connected via a link. The connecting link is rotatable with respect to the movable hood in the same direction as the rotation axis of the movable hood, and the first link is rotatable with respect to the plunger in the same direction as the rotation axis of the movable hood. And a second shaft portion that is rotatable, and the second shaft portion penetrates the plunger, has a sufficient length than the diameter of the plunger, and rotates in the axial direction. It is free to slide It solves the problem by providing a vehicular headlamp according to claim.

[0010]

Next, the present invention will be described in detail based on an embodiment shown in the drawings. 1 is a vehicle headlamp according to the present invention. The vehicle headlamp 1 is provided with a fixed hood 3 and a movable hood 4 on a light source 2 and moves the movable hood 4. This is to switch between passing light distribution and traveling light distribution by changing the range of light reaching the reflecting mirror 5, and the solenoid 6 is used to drive the moving hood 4 in comparison with the conventional example. The same is true.

The movable hood 4 is fixed hood 3
And the like, is rotatably supported around the rotating shaft 4a at an appropriate position, and can be freely rotated around the rotating shaft 4a. Is similar to that of the conventional example.

Here, in the present invention, the movable hood 4 and the solenoid 6 are connected by a connecting link 7, and the connecting link 7 has a substantially shaft having a first shaft portion 7a and a second shaft portion 7b. It is formed of a metal linear member having a circular cross section as a character shape. The movable hood 4 is provided with a bearing hole 4b corresponding to the first shaft portion 7a, and both are fitted (see also FIG. 3).

On the solenoid 6 side, a bearing hole 61a is provided in the plunger 61, and the second shaft portion 7b is fitted. However, since it is impossible to easily penetrate through the bearing hole 61a with the shape of the connecting link 7 that bends as described above, appropriate means such as partially dividing the plunger 61 side, for example, will be described later. Shall take.

With this configuration, the first shaft portion 7a of the connecting link 7 can freely rotate with respect to the movable hood 4,
Similarly, the second shaft portion 7b of the connecting link 7 has a plunger 61.
Can be freely rotated with respect to. Therefore, even when the moving hood 4 performing the rotary motion is driven by the plunger 61 having the linear motion, the difference between the two trajectories is that the connecting link 7 is inclined by the rotation of the two places as shown in FIG. It will be absorbed.

In addition, in the present invention, the second shaft portion 7b has a sufficient length with respect to the diameter of the plunger 61. Since the second shaft portion 7b is simply penetrated through the bearing hole 61a, the second shaft portion 7b is not restricted from moving in the axial direction. Therefore, the solenoid 6 is allowed to be attached to the movable hood 4 in a direction parallel to the second shaft portion 7b.

The movable hood 4 is provided with a return spring 4c, for example, as a coil spring coaxial with the rotating shaft 4a. When the solenoid 6 is not driven, the movable hood 4 is positioned at the passing position S. It gives a biasing force in the direction to make it. At this time, it is possible to hold the return position at the traveling position M by the return spring 4c. However, in the present situation where the traveling time by the passing light distribution is overwhelmingly long, the solenoid 6 is driven when the passing position S is maintained. This is not a good idea in terms of power consumption.

FIG. 3 shows an example of the joining of the plunger 61 and the structure of the connecting link 7. In this embodiment, the plunger 61 has a three-dimensional bearing having an appropriate groove width from the tip end. A hole 61a is formed,
A pin hole 61b that is orthogonal to the slotted shape is provided.
Therefore, when assembling, the second shaft portion 7b of the connecting link 7 is used.
Is inserted into the bearing hole 61a from the distal end side of the plunger 61 and the pin 61c is driven into the pin hole 61b so that the two can be engaged with each other.

Here, in the present invention, attention is also paid to the sound generated when the solenoid 6 is operated. In particular, when the power is supplied, the plunger 61 collides with the main body 62 of the solenoid 6 and the metal In this embodiment, the plunger 6 emits an impulsive sound.
1, a flange-shaped stopper 8 made of a resin member or the like is provided.

At this time, the stopper 8 is connected to one surface 8
In FIG. 7A, the impact sound generated by the collision of the metals is reduced to a soft tone in which the metal and the resin are brought into contact with each other, and the volume is also reduced. It is small so that the light distribution can be switched quietly.

A positioning plate 3a is also provided corresponding to the other surface 8b side of the stopper 8 by, for example, using a part of the fixed hood 3, and the movable hood 4 is moved by a return spring 4c. A passing position is given. Therefore, the stopper 8 and the positioning plate 3a
Is also performed as a collision between the resin member and the metal member, so that the degree of sound generation is reduced.

The stopper may be provided on the side of the moving hood 4. In this case, when the position of the moving hood 4 is set at the traveling position M by the stopper, the connection is established. In order to prevent the generation of the impact sound, it is necessary to provide the plunger 61 connected via the link 7 with a position where the solenoid 61 and the main body 62 do not collide with each other.

[0022]

As described above, according to the present invention, the plunger of the solenoid and the movable hood are connected via the connecting link, and the connecting link is connected to both the plunger and the movable hood by the movable hood. The vehicle headlamp according to the present invention is configured such that the vehicle headlamp is connected so as to be freely rotatable in the same direction as the rotation shaft, and one of them is slidable in the axial direction of rotation. In the headlights, the difference in the trajectories of both movements that occur when driving a moving hood that changes position by circular movement with a solenoid that changes position by linear movement can be absorbed by a connecting link, eliminating the occurrence of catching etc. This is an extremely advantageous effect in improving the reliability of this type of vehicle headlamp.

Also, in the present invention, a stopper formed of a resin member is employed to set the passing position and the traveling position with respect to the plunger, so that the plunger and the metal member such as the main body collide with each other and cause a large size. It is possible to prevent the generation of a loud and shocking tone, to prevent the occupant from feeling uncomfortable, and to achieve an extremely excellent effect in improving the merchantability.

[Brief description of the drawings]

FIG. 1 is a sectional view showing an embodiment of a vehicular headlamp according to the present invention.

FIG. 2 is an explanatory diagram showing an operation state of the same embodiment.

FIG. 3 is a perspective view showing a main part of the same embodiment.

FIG. 4 is a sectional view showing a conventional example.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Headlight for vehicles 2 ... Light source 3 ... Fixed hood 3a ... Positioning plate 4 ... Moving hood 4a ... Rotating shaft 4b ... Bearing hole 4c ... Return spring 5 ... Reflecting mirror 6 ... ... Solenoid 61 ... Plunger 61a ... Bearing hole 61b ... Pin hole 61c ... Pin 62 ... Body part 7 ... Linking link 7a ... First shaft part 7b ... Second shaft part 8 ... Stopper S …… Passing position M …… Running position

──────────────────────────────────────────────────続 き Continuation of the front page (56) References JP-A-10-241409 (JP, A) JP-A-10-236222 (JP, A) JP-A-2-73708 (JP, U) JP-A-4-73 99603 (JP, U) Actually open 62-42207 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) F21S 8/10 F21V 11/00

Claims (1)

(57) [Claims] A light source is provided with a fixed hood, a movable hood, and a solenoid, and the movable hood is rotated by a solenoid to vary a range of light from the light source reaching a reflecting mirror, thereby passing light and traveling light. In a vehicle headlamp configured to switch between light and light, the plunger of the solenoid and the movable hood are connected via a connecting link, and the connecting link is connected to the rotating shaft of the movable hood with respect to the movable hood. A first shaft portion rotatable in the same direction; and a second shaft portion rotatable in the same direction as the rotation axis of the movable hood with respect to the plunger, and the second shaft portion is A headlamp for a vehicle, wherein the headlamp has a sufficient length through the plunger and is longer than a diameter of the plunger so as to be freely slidable in the axial direction of rotation.