JPH0630899U - Signal light - Google Patents

Abstract

(57) [Summary] [Purpose] To prevent false lighting in signal lights. A front lens 13 is attached to a front end portion of a cylindrical member 12, a curved reflecting mirror 11 is attached to a rear end portion thereof, and a lamp 14 is provided in a central opening 11a of the reflecting mirror. In the reflector, a fan-shaped opening / closing portion 11c having a central angle of about 90 ° is rotatably attached to the rear end of the cylindrical member by a hinge 18, and a permanent magnet 16 is attached to the outer surface near the upper end of the opening / closing portion. Has been. A photo sensor 17 is attached to the reflecting mirror so that the light receiving surface comes to the inner surface. The photo sensor is connected to the control unit 20, and the control unit controls the energization of the electromagnet 24 to control the rearward opening / closing of the opening / closing portion of the reflecting mirror. When external light enters the lamp when the signal lamp is turned off, the control device opens the opening / closing portion and radiates the reflected light backward to prevent the pseudo lighting.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention is directed to a lamp, a curved reflecting mirror that is provided at the center of the lamp and reflects incident light from the lamp, etc., and a peripheral edge of the reflecting mirror that is substantially parallel to the central axis of the reflecting mirror. The present invention relates to a type of signal lamp equipped with a mounted cylindrical member and a front lens mounted on the front end of the cylindrical member, and in particular, external light that has entered the signal lamp when the lamp is off is reflected by a reflector. The present invention relates to a signal light device that prevents so-called pseudo lighting, which gives an impression as if the signal light device was turned on by being emitted by the signal light device.

[0002]

[Prior art]

 Conventionally, this type of signal light device has been known to have a small convex lens or a convex lens between the front lens and the lamp, as shown, for example, in "Traffic Engineering, Vol. 25, No. 6" (November 1990, published by Traffic Engineering Research Group). By providing a light-shielding lens that is a collection of a combination of a lens and a concave lens to prevent external light from entering and preventing the above-mentioned pseudo lighting, and by transmitting as many reflected light rays from the reflecting mirror as possible It was designed to prevent the decrease in luminous intensity.

[0003]

[Problems to be solved by the device]

 However, in the above signal light device, the light emission is still blocked by the light-shielding lens, so that it is not possible to sufficiently prevent the decrease in the luminous intensity of the signal light device. The present invention is intended to solve the above-mentioned problems, and an object of the present invention is to provide a signal light device capable of preventing pseudo lighting without reducing the luminous intensity of the signal light device at the time of lighting.

[0004]

[Means for Solving the Problems]

 In order to achieve the above-mentioned object, a structural feature of the present invention is that, in the signal lamp of the above type, an opening / closing portion formed on at least a part of the reflecting mirror and an opening / closing mechanism for opening / closing the opening / closing portion are provided. is there.

[0005]

[Operation and effect of the device]

 According to the present invention configured as described above, the opening / closing portion formed on at least a part of the reflecting mirror is opened by the opening / closing mechanism when external light having a predetermined illuminance or more enters the signal lamp when the lamp is off. This makes it possible to direct the incident external light to the rear of the reflecting mirror. As a result, external light such as sunlight, which was originally reflected by the reflector and radiated in front of the signal lamp and recognized as pseudo lighting, is not radiated to the front outside of the signal lamp. That is, according to the present invention, the pseudo lighting of the signal lamp can be surely prevented. Further, at the time of lighting, the opening / closing part of the opened reflecting mirror is closed to the original position by the opening / closing mechanism, so that the reflecting mirror can normally reflect the light of the lamp and radiate it outside. Further, since this signal lamp is not provided with a light shielding device such as a light shielding lens between the lamp and the lens, the luminous intensity of the signal lamp does not decrease when the lamp is turned on.

[0006]

【Example】

 Hereinafter, an embodiment of the present invention will be specifically described with reference to the drawings. FIG. 1 shows a schematic configuration of a signal lamp according to the present invention. The signal lamp comprises a lamp part 10 and a control part 20. The lamp portion 10 is formed by a curved reflecting mirror 11, a front lens 13, a cylindrical member 12 connecting the reflecting mirror 11 and the front lens 13, and the reflecting mirror 11, the cylindrical member 12 and the front lens 13. In the interior K of the lamp, the lamp 14 attached to the socket 14a provided in the opening 11a at the center of the reflecting mirror 11 is provided.

The reflecting mirror 11 is a curved surface body made of iron, and as shown in FIG. 2, a fan-shaped opening / closing portion 11 c provided at an upper portion and having a center angle of about 90 °, and a fixed portion 11 constituting other portions. It is separated into b and. The fixed portion 11b is integrally fixed to the support member 15 at the opening 11a, and the opening / closing portion 11c is rotatably attached to the cylindrical member 12 by a hinge 18. A permanent magnet 16 is attached to the outer surface near the upper end of the opening / closing portion 11c, and the opening / closing portion 11c is attracted or repelled by an electromagnet 24, which will be described later, provided at the position opposite to the permanent magnet 16 to cause the hinge 18 to move. It is possible to rotate about a predetermined angle around. A photo sensor 17 such as a photodiode is attached to the fixed portion 11b so that the light receiving surface faces inward. The front lens 13 has a large number of concave lenses formed on the inner surface thereof in a plurality of upper and lower stages, and is integrally molded of a plastic material.

As shown in the block diagram of FIG. 1, the control section 20 includes a comparison circuit 21 that receives an illuminance detection signal from the photo sensor 17 and compares it with a standard signal, and a current detection circuit that detects power supply to the lamp 14. 22, a switch SW21, SW22, a battery 23, and an electromagnet 24 excited by the battery 23. The current detection circuit 22 is equipped with relays R1 and R2 that operate for a fixed time when the power supply to the lamp 14 rises and falls.

Next, the operation of the signal light device will be described with reference to FIGS. 1 and 3. When the lamp 14 is extinguished, when the sun tilts and the outside light that is not blocked by the cover (not shown) of the signal lamp enters the inside K of the lamp, as shown by the solid line 1, part of it Is refracted by the lens 13 and enters the opening / closing portion 11c of the reflecting mirror 11. The incident outside light is normally reflected by the reflecting mirror 11, further refracted by the lens 13, and emitted to the outside of the front of the signal lamp to cause pseudo lighting. However, in this embodiment, the illuminance signal is output from the photo sensor 17 to the comparison circuit 21 at the same time as the outside light enters the signal lamp interior K. The comparator circuit 21 outputs a continuous signal of "1" to the switch SW21 by detecting the illuminance equal to or higher than the set value. On the other hand, the current detection circuit 22 detects the rise and fall of the power source and drives R1 and R2 respectively for the time required to magnetize the electromagnet 24 to make the contacts r1 and r2 of each R. In response to this, when the battery 23 outputs a current to the electromagnet 24 in the direction A, for example, the electromagnet 24 is magnetized and attracts the permanent magnet 16 to move the opening / closing portion 11c of the reflecting mirror 11 to the rear side about the hinge 18. Rotate. As a result, the external light that has entered the housing is reflected toward the rear of the reflecting mirror 11, as shown by the dotted line in FIG. 3, and is not emitted toward the front of the signal lamp. That is, there is no false lighting that deceives the human eye.

When the signal lamp is turned on, the current detection circuit 22 receives the turn-on signal from the lamp 14 and operates the relay R2 to make its contact r2 to flow an electric current in the B direction, and the electromagnet 24. Magnetize in the opposite direction. As a result, the same poles of the permanent magnet 16 and the electromagnet 24 face each other, and the opening / closing portion 11c of the reflecting mirror 11 is returned to its original position by the repulsive action, and the light from the lamp 14 is normally reflected by the reflecting mirror 11. It is radiated to the front of the signal lamp. Further, since no light-shielding lens or the like for blocking the emission of light is provided between the lamp 14 and the front lens 13, light of a predetermined luminous intensity is emitted from the signal lamp. In the above embodiment, about 1/4 of the reflecting mirror is attached to the rear end of the cylindrical member by a hinge and is rotated about the hinge. However, if necessary, the reflecting mirror can be rotated. You may make it increase / decrease a part or rotate all. Further, the drive mechanism of the opening / closing portion is not limited to the above-mentioned type, but may be another type, for example, one in which the opening / closing portion is directly rotated by a motor. Further, the photo sensor 17 may be arranged not inside the lamp but on the front surface of the case of the signal lamp or the like to directly detect the sunlight. Further, it is not necessary to provide one photosensor 17 and the comparison circuit 21 of the control portion 20 for one signal light device, and one photosensor 17 and the comparison circuit 21 may be provided for a plurality of traffic lights that generate pseudo lighting installed at one intersection.

Next, another embodiment of the present invention will be specifically described with reference to the drawings. As shown in FIGS. 4 and 5, the signal lamp according to the present embodiment is provided with a plurality of slits 11d in a fan-shaped portion having a central angle of about 90 ° on the upper portion of the reflecting mirror 11, and the slit 11d is provided in A fan-shaped slide plate 30 having a central angle of about 90 ° in which a slit 31 having a shape corresponding to the slit is formed on the back surface side is provided. The slide plate 30 is provided with a permanent magnet 16 on the outer surface near the end thereof, and is movably fitted to the guide rails 11e and 11f provided at the peripheral portion and the central portion of the reflecting mirror 11. The slide plate 30 is attracted or repelled by the electromagnet 24 provided at a position facing the permanent magnet 16 to rotate about the central axis of the reflecting mirror 11d by a predetermined angle. Although the slit 11d of the reflecting mirror 11 and the slit 31 of the slide plate 30 do not overlap with each other, the slits are overlapped when the slide plate 30 is attracted by the electromagnet 24 and moved. The other configurations of the signal light device are the same as those in the above embodiment.

Next, the operation of the other embodiment will be described with reference to FIG. When the lamp 14 is turned off, external light enters the housing K, and the photo sensor 17 detects an illuminance equal to or higher than a set value, thereby outputting an illuminance signal to the comparison circuit 21. The comparison circuit 21 makes the switch SW21 when the illumination is equal to or higher than a predetermined value, and makes the contact r1 of the relay R1 when the current detection circuit 22 detects the rise of the power supply (start of supply). When the battery 23 supplies a current to the electromagnet 24 by this, the electromagnet 24 attracts the permanent magnet 16 to slide the slide plate 30 along the back surface of the reflecting mirror 11 in the direction of arrow X by a predetermined angle, and The slit 11d and the slit 31 of the slide plate 30 are aligned. Therefore, the external light incident on the inside K of the lamp does not radiate toward the front of the signal lamp because it travels backward through the slit. That is, there is no pseudo lighting that deceives the human eye. A light absorber may be provided behind the slide plate 30. Further, when the signal lamp is turned on, the relay R2 of the current detection circuit 22 operates to make its contact r2, thereby supplying a reverse current to the electromagnet 24, and the electromagnetic stone 24 repels the permanent magnet 16. Slides the slide plate 30 in the direction opposite to the arrow X to return it to its original position. As a result, the light from the lamp 14 is normally reflected by the reflecting mirror 11 and radiated forward. Further, since there is no light-shielding lens or the like provided between the lamp 14 and the front lens 13 to prevent light emission, light of a predetermined luminous intensity is emitted from the signal lamp.

In the above embodiment, the slits are formed in the slit forming portion of the reflecting mirror and the fan-shaped portion with the center angle of the slide plate of about 90 °. However, if necessary, the area of the slide plate and the slit formation are formed. You may make it increase / decrease the area of a part suitably. Further, the moving mechanism of the slide plate is not limited to the above-mentioned type, but another type such as an actuator such as a linear ultrasonic motor may be used.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing an overall configuration of a signal lamp according to an embodiment of the present invention.

FIG. 2 is a rear view of a reflector of the signal lamp.

FIG. 3 is an explanatory diagram showing an operation of the signal light device.

FIG. 4 is a schematic front view of a signal lamp according to another embodiment of the present invention.

FIG. 5 is a schematic rear view showing a reflecting mirror of the signal lamp.

[Explanation of symbols]

10: Lamp part, 11: Reflector, 11d; Slit, 11
e, 11f; guide rail, 12; cylindrical member, 13; front lens, 14; lamp, 16; permanent magnet, 17; photosensor, 20; control part, 24; electromagnet, 30; slide plate, 31; slit.

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[Procedure amendment]

[Submission date] September 21, 1992

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Name of item to be corrected] Figure 1

[Correction method] Change

[Correction content]

[Figure 1]

Claims (1)

[Scope of utility model registration request] 1. A signal lamp equipped with a lamp and a curved reflecting mirror for reflecting incident light from the lamp or the like provided at the central axis position of the lamp, and an opening / closing portion formed on at least a part of the reflecting mirror. The signal light device is provided with an opening / closing mechanism for opening / closing the opening / closing portion.