JPH0652703A - Glare proof device for vehicle headlight - Google Patents

Abstract

PURPOSE:To add glare proof function to a headlight and safely run an automobile as the headlight is in high beam. CONSTITUTION:A plurality of polarizing plates 18 are laterally arranged in the front of a lamp 12. The polarizing plates 18 are rotatably supported by a support frame 10 through a holder on the upper end and a support gear 20 on the lower end. The support gear 20 is connected to a stepping motor 25 through a worm gear 28, and each polarizing plate 18 is arranged in the working position of a line and the mutually parallel non-working position. When the polarizing plates 18 are arranged in the working positions when a headlight 1 is set to high beam, the glare received by an oncoming car is reduced.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an antiglare device for vehicle headlights such as automobiles.

[0002]

2. Description of the Related Art For example, when driving a car on a night road in the case of rain, if the headlight is made to be a low beam, the field of view is very narrow and it is difficult to see the distance. Therefore, it is desirable that the headlight always travels with the high beam.

[0003]

However, in the prior art, since the oncoming vehicle cannot be driven with the headlight always high beam because it is an oncoming vehicle, the driver of the oncoming vehicle is prevented from being dazzled.
There was the trouble of repeating the dimming operation every time an oncoming vehicle arrived.

The present invention has been made by paying attention to such a conventional technique, and an object thereof is to provide a device capable of safely driving a vehicle in a high beam by adding an antiglare function to a headlight. To do.

[0005]

In order to solve the above problems, an antiglare device of the present invention comprises a polarizing member disposed in front of a lamp, and a support mechanism for movably supporting the polarizing member. , And a drive mechanism for arranging the polarizing member in the operating position and the non-operating position.

Preferably, the polarizing member is composed of a plurality of strip-shaped polarizing plates, and the supporting mechanism includes a supporting gear for rotatably supporting the polarizing plate about an axis orthogonal to the optical path of the lamp. The drive mechanism includes a drive gear that drives the support gear and a rotary drive source that is connected to the drive gear.

[0007]

In the antiglare device of the present invention, when the vehicle is traveling in the high beam state, if the polarizing member is arranged at the operating position by the driving mechanism, the polarizing member suppresses the diffused reflection of the light from the headlight. , The glare that the oncoming vehicle receives is reduced. Therefore, the vehicle can be safely driven with the headlights kept in high beams, and the trouble of repeating the dimming operation is eliminated.

When a plurality of polarizing plates are connected to a stepping motor through a supporting gear and a driving gear,
By controlling the rotation speed of the rotary drive source, the angle of the polarizing plate with respect to the optical path of the lamp is arbitrarily adjusted. Therefore, the degree of polarization can be easily adjusted according to the road surface condition. Further, since the supporting gear has both a supporting function of the polarizing plate and a power transmitting function to the polarizing plate, there is an advantage that the number of parts can be reduced.

[0009]

Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 5, the automobile headlight of the present embodiment includes a casing 3 embedded in the front portion of the body 2. The casing 3 is composed of a mounting frame 4 and a lamp cover 5 which are divided into two parts. The mounting frame 4 is assembled to the bracket 7 of the body 2 with bolts 6. The lamp cover 5 is joined to the front surface of the mounting frame 4 and is separably joined by a plurality of clips 8.

A reflecting plate 9, a support frame 10, and a lens 11 are housed inside the casing 3. The reflector 9 is provided with a lamp 12 at the center, and a screw 1 is provided via a packing 13.
It is joined to the rear surface of the support frame 10 by 4. Lens 1
1 is connected to the front surface of the support frame 10 by screws 15. As a result, the reflector 9, the support frame 10, and the lens 11 are integrally assembled, and the integrated component is sandwiched between the mounting frame 4 and the lamp cover 5 inside the casing 3. A packing 16 is interposed between the lens 11 and the lamp cover 5.

An antiglare device 17 of this embodiment is provided inside the support frame 10. The antiglare device 17 includes a plurality of polarizing plates 18, and the polarizing plates 18 are arranged side by side so as to cover the lamp 12 from the front. Each polarizing plate 18
Is a transparent plate made of glass, acrylic or the like, and a polarizing film or film is attached to the surface of the transparent plate, and each is formed in a strip shape having the same size. A holder 19 is attached to the upper end of the polarizing plate 18, and a supporting gear 20 is attached to the lower end thereof, and a groove portion 21 into which the end portion of the polarizing plate 18 is fitted is attached thereto.
And a shaft portion 23 to be inserted into the hole 22 of the support frame 10. The holder 19 and the support gear 20 constitute a support mechanism, and support the polarizing plate 18 with respect to the support frame 10 so as to be rotatable around a vertical axis orthogonal to the optical path of the lamp 12. In addition, the support gears 20 are provided in a row on the left and right in a state of being meshed with each other.

A stepping motor 25 as a rotary drive source is installed on the lower side of the left end portion of the support frame 10, and a front end of an output shaft 26 thereof is supported by the support frame 10 via a bearing plate 27. A worm gear 28 as a drive gear is provided on the output shaft 26, and the worm gear 28 is meshed with the support gear 20 at the left end. A drive mechanism is composed of the stepping motor 25 and the worm gear 28,
The support gears 20 are simultaneously driven via the worm gear 28 by the forward and reverse rotations of the stepping motor 25, and the respective polarization plates 18 continuously operate without gaps in the same vertical plane spreading left and right (see FIGS. 1 and 2). ) And a non-acting position (see FIG. 5) spaced in parallel with each other.

An operating member (not shown) for operating the antiglare device 17 is provided in the driver's seat of the automobile. A push button can be used as an example of the operation member. When the push button is pressed, the stepping motor 25 rotates, and when the hand is released, the stepping motor 25 stops and the polarizing plate 1
8 can be adjusted to any angle. Also,
The operating member is provided so as to be interlocked with the beam switching lever, and when the beam switching lever is switched to the high position, the polarizing plate 18 is placed in the operating position, and when it is switched to the low position, the polarizing plate 1
8 may be arranged in the non-acting position.

Next, the operation of the antiglare device 17 of the present embodiment constructed as described above will be described. Headlight 1
When is set to a low beam, each polarizing plate 18 is arranged in a non-acting position as shown in FIG. Therefore, the light from the lamp 12 irradiates the road surface in a state close to normal without being polarized by the polarizing plate 18.

On the other hand, when the headlight 1 is switched to the high beam during traveling on a night road in rainy weather, each of the polarizing plates 18 is simultaneously rotated by the stepping motor 25 via the worm gear 28 and the support gear 20. And as shown in FIG. 2, they are arranged in a horizontal row in the operating position. In this state, the light of the headlight 1 is emitted through the polarizing plate 18, and diffused reflection of the headlight 1 is suppressed by the polarizing action of the polarizing plate 18, so that glare received by the oncoming vehicle is reduced. Therefore, headlight 1
You can safely drive the vehicle while keeping the high beam, and unlike the conventional case, the trouble of repeating the dimming operation every time an oncoming vehicle arrives is eliminated.

Further, in the antiglare device 17 of this embodiment, each polarizing plate 18 has a supporting gear 20 and a worm gear 28.
Since it is connected to the stepping motor 25 via the
The angle of the polarizing plate 18 with respect to the optical path of the lamp 12 can be arbitrarily adjusted by controlling the number of rotations. Therefore, the degree of polarization can be easily adjusted according to the road surface condition such that the degree of polarization is high in rainy weather and low in fine weather. Moreover, since the support gear 20 has both the function of supporting the polarizing plate 18 and the function of transmitting power thereto, there is an advantage that the number of parts can be reduced.

Next, another embodiment of the present invention will be described with reference to FIGS. FIG. 6 shows a modified example of the drive mechanism of the polarizing plate 18, in which the supporting gears 20 are formed with a diameter smaller than the width of the polarizing plate 18 and are arranged in a line in a state of being separated from each other. There is. Each support gear 20 is meshed with a rack 30 as a drive gear, and the rack 30 is connected to a stepping motor (not shown) so as to be moved left and right. With the configuration of this modified example, the same operational effect as that of the above-described embodiment can be obtained.

In the embodiment shown in FIG. 7, the antiglare device 1
7 is attached to the front surface of the existing headlight 1. The antiglare device 17 is provided with a cover 32, in which a polarizing plate 18, a support gear 20, and the like, which are substantially the same as those in the above-described embodiment, are housed. Locking claws 33 are provided on the periphery of the cover 32,
By disengaging this from the locking portion 34 of the body 2,
The antiglare device 17 is detachably attached to the existing headlight 1. According to the configuration of this embodiment, a new antiglare function can be added to the existing headlight 1 by a simple modification work.

In the embodiment shown in FIG. 8, the polarizing film 36 is used as the polarizing member, and the supporting mechanism is composed of a pair of left and right winding drums 37, 38. The polarizing film 36 is connected to a transparent film 39 having substantially the same length as the polarizing film 36, and both films 36, 39 are stretched between the winding drums 37, 38. One winding drum 37 is connected to a motor 40, and the other winding drum 38 is provided with a spiral spring 41 for returning. A drive mechanism is configured by the motor 40 and the spiral spring 41,
The polarizing film 36 is arranged at an operating position where the drive motor 40 feeds the winding drum 38 to cover a lamp (not shown) from the front and a non-operating position where the spiral spring 41 winds the winding film 38 onto the winding drum 38. It is supposed to be done. Therefore, when the headlight is high-beamed, if the polarizing film 36 is extended to the working position, it is possible to reduce glare received by the oncoming vehicle.

Other than that, the present invention is not limited to the above-mentioned respective embodiments, and for example, in the above-mentioned embodiments, a polarizing plate 18 using a motor rotating in one direction as a rotation drive source is used within the scope of the present invention. May be embodied by arranging in a working position and a non-working position, applying to a headlight of a train or the like instead of a headlight of an automobile, and appropriately changing the shape and configuration of each part.

[0021]

As described above in detail, according to the invention described in claim 1, since the headlight is provided with the antiglare function, the glare received by the oncoming vehicle when the headlight is set to a high beam. It has an excellent effect that the vehicle can be safely driven while keeping the high beam.

According to the second aspect of the present invention, since the plurality of polarizing plates are connected to the rotary drive source via the supporting gear and the driving gear, the angle of the polarizing plate with respect to the optical path can be arbitrarily adjusted to polarize the polarized light. The effect is that the degree can be easily adjusted according to the road surface condition.

[Brief description of drawings]

FIG. 1 is a partially cutaway plan view of a headlight showing an embodiment of the present invention.

FIG. 2 is a sectional view taken along the line AA of FIG.

3 is a cross-sectional view taken along the line BB of FIG.

FIG. 4 is an exploded perspective view of the headlight shown in FIG.

5 is a cross-sectional view showing the polarizing plate of FIG. 1 in a non-acting position.

FIG. 6 is a sectional view showing a modified example of a drive mechanism.

FIG. 7 is a cross-sectional view of an antiglare device showing another embodiment of the present invention.

FIG. 8 is a plan sectional view of an antiglare device showing still another embodiment of the present invention.

[Explanation of symbols]

1 ... Headlight, 12 ... Lamp, 17 ... Antiglare device, 1
8 ... Polarizing plate, 19 ... Holder, 20 ... Support gear, 25 ...
Stepping motor as rotary drive source, 28 ... Worm gear, 30 ... Rack, 36 ... Polarizing film, 37, 3
8 ... Winding drum, 40 ... Drive motor, 41 ... Spiral spring.

Claims (2)

[Claims] 1. A polarizing member disposed in front of the lamp,
An antiglare device for a vehicle headlight, comprising: a supporting mechanism that movably supports the polarizing member, and a driving mechanism that arranges the polarizing member in an operating position and a non-operating position. 2. The polarizing member is composed of a plurality of strip-shaped polarizing plates, and the supporting mechanism includes a supporting gear for rotatably supporting the polarizing plate around an axis orthogonal to the optical path of the lamp. The antiglare device for a vehicle headlight according to claim 1, wherein the drive mechanism includes a drive gear for driving the support gear and a rotary drive source connected to the drive gear.