JPS6215181A - Luminaire for bicycle - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

[Detailed description of the invention] (b) Industrial application field The present invention relates to a lighting device for use on a bicycle.

2) Conventional technology This type of lighting device in the past was developed in U.S. Pat.
As shown in Publication No. 79, a solar battery is installed and charged by converting sunlight into electricity during the day.
This charging power is used to turn on the headlights at night, but with such a structure, the headlights are always on when used at night, which causes the solar battery to consume power quickly.

Another disadvantage is that the user must manually open and close a switch to stop power supply to the solar battery.

(c) Problems to be Solved by the Invention It is an object of the present invention to automatically control charging and discharging from a secondary battery to eliminate consumption of the secondary battery.

B) Means for Solving the Problems The present invention provides a method in which: (1) a generator, a headlamp, a secondary battery, and an illuminance detection means are connected in parallel with each other; a switch means is connected in series with the headlamp; The device is characterized by an opening/closing means that opens the switch means when the illuminance detecting means detects a predetermined brightness while generating electricity.

(E) Function Since the present invention has such a configuration, when driving at night in a dark place, the headlights can be turned on using the power from the secondary battery and the generator, and the headlights can also be turned on by using the secondary battery in combination. Because of this, less leg power is required to rotate the wheels, and in relatively bright places such as shopping streets, the headlights can be automatically turned off, and the secondary battery can be charged by a generator. .

(f) Example (1) has a headlight (2) consisting of a light bulb (μθ) in the front.

This bicycle is equipped with a tail light (3) consisting of a light emitting diode at the rear, and the front fork is pressed against the outside surface of the front wheel (4) when the front wheel (4) is folded down. Equipped with an alternator (5) that generates electricity using the rotational force of the front wheels (4),
A taillight is provided on the mudguard (7) of the rear wheel (6) with the taillight (3) facing rearward and an illuminance detection means (8) made of a solar cell that generates electricity from sunlight (S) facing upward. Unit (9) is installed. A rechargeable secondary battery C1O is installed inside the taillight unit (9).

Further, the illuminance detection means (8) may be of any type as long as it detects a predetermined brightness and outputs a signal.

Next, the electric circuit will be explained. Generator (5) and headlight (21)
The battery section and the illuminance detection means (8) are connected in parallel to each other. The generator (5) is a diode (D&)
A second switch consisting of an NPN transistor is connected in series with the headlight (2+) via a first diode (Dl) for backflow prevention. Means (T2) is connected. Said headlamp (
2) and release '1! For the song with machine (5), '1P11 resistance (R
1) and PNP) first switch means (
A parallel circuit with T1) is connected. A second resistor (R2) is connected between the collector of the second switch means (T2) and the pace of the first switch means (T1). The pace of the second switch means (Tz) is the same as that of the third transistor (T3) of NPN type and the fourth transistor (T3) of NPN type.
4), and this third transistor (T
The pace of 3) is the third transistor at the connection point between the PNP type fifth transistor (T5) and the PNP type sixth transistor (T6).
It is connected via a resistor (R5). (Ra), (R
5) is a protective resistance.

A first capacitor (01) for charging and discharging is connected to the third resistor (R5). Said @4 transistor (T4
) and the collector of the sixth transistor (T6) are connected through a sixth resistor (R6) having a large resistance value. In addition, a second capacitor (02) for charging and discharging is connected between the pace and emitter of the fourth transistor (T4), and a second diode (D2) for preventing backflow is connected in parallel with this second capacitor (C2). A seventh resistor (R7) having a smaller resistance value is connected through the resistor.

Then, an eighth resistor (R8) and a ninth resistor (R9) are connected in parallel with the battery (11), and the pace of the sixth transistor (T6) is connected to the intermediate point between these resistors (D3).
is a third diode for backflow prevention.

FIG. 3 shows another embodiment in which a solar cell (8) is provided on the upper surface of a headlight (2).

To explain the operation of this configuration, first, when driving at night and driving the generator (5), when the vehicle comes to a place where the brightness is lower than a predetermined level, the output from the first generator (5) is used. The fifth transistor (, r s ) is turned on, and the sixth transistor (T3) is also turned on. On the other hand, since there is no output from the illuminance detection means (8), the tJ6) transistor (T6) is turned off, and the '1g4) transistor is turned on. (T4) is also turned OFF, and as a result, the second switch means (T2) is turned ON, and the first switch means (T1) is also turned ON, and the output of the secondary battery section and the generator (
5) is used to turn on the headlight (2). At this time, as long as the secondary battery a has a sufficient amount of charge, only a small amount of output is required from the generator (5), so there is no burden on the legs that rotate the wheels.

Also, when driving at night and coming from a dark place to a bright place such as a shopping district, the generator is activated because the wheels are rotating.
5), and as mentioned above, the fifth transistor (
T5) and the third transistor (TS) are turned on, and on the other hand, since the brightness is at a predetermined level, there is an output from the illuminance detection means (8), so that the sixth transistor (T6) and '! J4)
The transistor (T4) is also turned on, and as a result, the second switch means (T2) and the 9Jf11 switch means (T1) are also turned on.
Becomes FF.

The headlight (2) is turned off and the secondary battery α [is connected to the first resistor (R
1) is charged from a generator (5).

As described above, the present invention is 1j! I3 transistor (T5)
- The opening/closing control means diagram consisting of the sixth transistor (T6) etc. is ON-OFF controlled by the illuminance detection means (8), and as a result, the opening/closing of the switch means (T2) is controlled and the headlights (
2) Turns off depending on the outside brightness.

It is possible to automatically select whether to turn on the lights, charge the secondary battery ELG using the electric generator (5), and turn on the headlight (2) when the secondary battery (11) has a sufficient amount of charge. Sometimes less force is required to drive the generator (5).

(g)) Effects of the invention This is because the present invention is constructed as described above.

The flashing of the headlights can be automatically selected depending on the outside brightness, and since the headlights are turned off when it is bright, it is possible to reduce the consumption of the secondary battery, and when the headlights are turned off, the generator is activated. The secondary battery can be charged at the same time, and when the headlights are turned on, the power is supplied from the secondary battery, so the power generated by the generator is small, and as a result, the power required to drive the generator is reduced. It has the effect of requiring less.

[Brief explanation of the drawing]

Fig. 1 is a schematic diagram of a bicycle equipped with the lighting device of the present invention;
This figure is the same electric circuit diagram, and FIG. 3 is a perspective view showing another embodiment. (2)... Headlight, (5)... Generator, (8)...
・Illuminance detection means. α [... Secondary battery, (T2)... Switch means, (
4)...Opening/closing control means.

Claims (1)

[Claims] (1) A generator that generates electricity as the wheels rotate, a headlamp, a secondary battery, and an illuminance detection means are connected in parallel to each other, and a switch means is connected in series to the headlamp, and the generator A lighting device for a bicycle, characterized in that an opening/closing control means that generates electricity and opens the switch means when the illuminance detection means detects a predetermined brightness is connected between the switch means and the illuminance detection means.