JPH02293228A - Automatic light on-off method for bicycle lamp and device thereof - Google Patents

Abstract

PURPOSE:To eliminate dynamo load as well as to secure safety by forming a dynamo in attaching a coil to a front fork and permanent magnet to a spoke respectively, generating electromotive force without fail during travel, and charging a storage battery at daytime and feeding a head lamp and a tail lamp at night. CONSTITUTION:A dynamo 6 is made up of installing a coil 11 in a front fork and a permanent magnet 12 in a spoke 9 respectively. In addition, a light detector 3, a charger 7, a storage battery 5 and a voltage comparator 13 are connected to a head lamp 1, and a travel detector 4 is attached to a stand 10. At time of traveling at daytime, the travel detector 4 comes on when the stand 10 is raised, and the light detector 3 comes off and the voltage comparator 13 is turned to the side of the storage battery 5 in design. If travel takes place, the comparator 13 is turned to the side of the dynamo 6 so that the battery 5 is charged. At night, the light detector comes on, and the comparator 13 exists at the side of the battery 5, whereby the head lamp 1 and a tail lamp 2 are lighted by the battery 5. During travel at night, electromotive force is produced in the dynamo 6 with the wheel rotation, and the comparator 13 is turned to the side of the dynamo 6, thus the head lamp is lighted by the dynamo 6.

Description

[Detailed description of the invention] [Industrial application field]

This invention automatically turns off the lamp and charges the storage battery during the day while the bicycle is running, and turns on the lamp at night, reducing the running load due to constant power generation.

[Conventional technology]

Conventionally, when riding a bicycle at night, the generator lever was twisted to bring the generator into contact with the tires, and the brightness of the lamp increased due to the electromotive force generated by the rotation speed of the generator, but this had the disadvantage of increasing the running load. Ta. When riding a bicycle during the day, the lights were turned off by operating the generator lever and separating the generator from the tires.

[Problem to be solved by the invention]

Therefore, the trouble of operating the generator lever when turning on and off the lamp is reduced, the driving load is reduced while the lamp is on, and lamp lighting at night is ensured by both the storage battery and the generator.

[Means to solve the problem]

The present invention was made to eliminate this drawback, and this will be explained with the drawings. As shown in Figures 1 and 2, the lamps include a headlight 1, a taillight 2, a photodetector 3, a travel detector 4 attached to a stand 10, a storage battery 5, and two lamps fixed on both sides of the front fork 8. coil 1] and permanent magnets 1 attached at equal intervals to the spokes 9.
Attach the power generator 36, charger 7, and voltage comparator 13, each consisting of 2, to the bicycle. The headlamp 1, photodetector 3, storage battery 5, charger 7, and voltage comparator 13 are integrated. As shown in FIG. 3, the headlight 1 consists of a light bulb, and the taillight 2 consists of a light emitting diode, and is powered by power from a storage battery 5 and a generator 6. The state of the relay of the photodetector 3 is "OFF: Power is supplied to the charger 7" when the surroundings are bright, and "ON: Power is supplied to the charger 7" when the surroundings are dark.
When the stand 1O is set up, the running detector 4 turns on: Power is supplied to each part, and when it is lowered, it is turned off: power is cut off. A rechargeable battery is used as the storage battery 5.The charger 7 compares the electric power of the storage battery 5 and the generator 6 with a voltage comparator 13, and if the capacity of the storage battery 5 decreases and the electromotive force is large, the charger 7 charges the electric power for charging. The generator 6 always generates electricity while driving, and after converting it to DC voltage,
By the action of the photodetector 3 and the voltage comparator 13, power is supplied to the charger 7 during the day and to the headlights 1 and taillights 2 at night. A voltage comparator 13 compares the voltages of the storage battery 5 and the generator 6. If the voltage of storage battery 5 is high and it is nighttime, headlight 1 and taillight 2 are turned on.
Supply to. When the voltage of the generator 6 is high, it is supplied to the headlights 1 and taillights 2 at night, and to the charger 7 during the day.

[Effect]

When driving in the daytime, the running detector 4 is turned on by raising the stand 10, but because the surroundings are bright, the light detector 3 is turned off and the voltage comparator 13 is on the storage battery 5 side. While the vehicle is running, an electromotive force is generated in the generator 6.This electromotive force is generated when the running detector 4 is turned on, the photodetector 3 is turned off, and
Since the voltage comparator 13 is located on the generator 6 side, the voltage is stored in the storage battery 5. When you raise the stand 10 to drive at night, the running detector 4 turns on, the light detector 3 turns on because the surroundings are dark, and the voltage comparator 13 turns on the battery 5 side because the generator 6 is not operating. Therefore, the headlights 1 and taillights 2 are turned on by the power of the storage battery 5.During night driving, an electromotive force is generated in the generator 6 according to the rotational speed of the wheels.
The voltage comparator 13 becomes the generator 6 (!!I), and the headlights 1 and taillights 2 are turned on instead of the power from the storage battery 5.

【Example】

Therefore, while the vehicle is running, the generator 6 always generates electromotive force, which charges the storage battery 5 during the day and automatically turns on and off the lamps to supply the power to the headlights 1 and taillights 2 at night. Since the generator 6 has no mechanical friction, the load generated by power generation while the vehicle is running is light, and no noise is generated. A method using solar cells instead of the generator 6 can also be realized. Since the voltage is stable due to the power of the storage battery 5 and the generator 6, the taillight 2 is used as a way to alert traffic vehicles in the pond.
This enables intermittent lighting of red light emitting diodes.

【Effect of the invention】

The present invention eliminates the need for bicycles to ride at night without lights.
Even when the vehicle is not running, if the stand is up, the lamp of the Yabin will light up as power is supplied from the storage battery 5, which is useful for traffic safety.

[Brief explanation of the drawing]

Fig. 1 is a diagram of the installation of the present invention on a bicycle. Fig. 2 is a horizontal diagram of the generator 6. Fig. 3 is a schematic diagram of the electrical circuit. 1...headlight, 2...taillight, 3...・Photodetector, 4
... Traveling detector, 5... Storage battery, 6... Generator,
7... Charger, 8... Front fork, 9... Spoke, 10... Stand, 1l... Coil, 12...
・Permanent magnet, l3...voltage comparator

Claims (1)

[Claims] Regarding the headlight 1 and taillight 2 used for a bicycle, a photodetector 3, a running detector 4, a storage battery 5, a generator 6,
A method and device for automatically turning on and off lights by combining a charger 7 and a voltage comparator 13.