JPH0911949A - Light emitting device for bicycle - Google Patents

Abstract

PURPOSE: To turn on a light emitting element for a prescribed time corresponding to the charging amount of a capacitor even if a bicycle stops by series- connecting the light emitting element and a resistor with an induction coil, and parallel-connecting the capacitor with the light emitting element and the resistor series-connected with the induction coil. CONSTITUTION: When a bicycle 2 runs and a magnet 2 rotates with a rear wheel, induction current runs through the inside of an induction coil 7 each time the coil 7 cuts off a part of flux of the magnet 2. The induction current switches its polarity every half wave, so light emitting diodes 3, 4 emit light intermittently, i.e., flash. Electric charges are accumulated in the capacitor 6 by excess current. When the bicycle stops temporarily at an intersection or the like, the electric charges are discharged to a closed circuit formed out of a resistor 5, the light emitting diode 4 and the capacitor 6, and the light emitting diode 4 is turned on with electric current passed for a prescribed time according to a time constant set by the resistor 5 and the capacitor 6.

Description

Detailed Description of the Invention

[0001]

[0001]

[0002]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a self-powered light emitting device mounted on a carrying means such as a bicycle.

[0003]

[0002]

[0004]

2. Description of the Related Art Conventionally, a bicycle light emitting device includes a headlight and a taillight. The headlights illuminate the front of the vehicle to assist driving at night or in an environment with poor visibility, and appeal to the approaching bicycles to oncoming vehicles or pedestrians to prevent collisions and other accidents. In addition, the taillights appealed to the presence of the bicycle to other vehicles approaching the bicycle from the rear at night or in an environment with poor visibility to prevent a rear-end collision accident.

[0005]

Conventionally, there are a bicycle light emitting device using a battery as a power source and a self-power generation type. However, many headlights are self-power generation type because of easy operation and inexpensive equipment. Although it was used, tail light equipment was not obligatory, so it was limited to some adoptions.

However, since a reflector is obliged to be attached to the rear part of the vehicle mainly for the purpose of preventing a rear-end collision, a relatively inexpensive reflector that reflects the light of another vehicle approaching from behind and shines on the bicycle is provided. It was used a lot.

Further, the conventional bicycle does not have a light emitting device for emitting light to the side of the vehicle body, and a reflector is fixed to a part of the spokes of the wheel, which is used for safety prevention of the side of the bicycle.

[0008]

FIG. 2 shows a conventional self-powered bicycle light emitting device.

In FIG. 2, 101 is a tail light, which is fixed to a part of the vehicle body near the rear wheel of the bicycle. Further, 102 is a magnet, which is attached to a part of the movable portion of the rear wheel.

The tail lamp 101 is a light emitting diode 103,
104. The light emitting diodes 103 and 104 are connected in parallel so that the forward directions of the respective elements are opposite to each other, and are connected in series to the induction coil 105.

The induction coil 105 of the tail lamp 101 is arranged so as to interlink with a part of the magnetic flux generated from the magnet 102 every time the rear wheel makes one revolution.

[0012]

When the bicycle starts, the magnets 102 rotate as the wheels rotate. In addition, the induction coil 105
Since a part of the magnetic flux generated from the magnet 102 is cut each time the rear wheel makes one rotation, an induced current (AC current) flows inside the coil and the light emitting diodes 103 and 104 mutually emit light according to the polarity of the induced current. Therefore, the tail lights apparently continuously emit light while the bicycle is running.

[0013]

However, since the conventional self-generating tail light stops emitting light at the same time as the bicycle stops, it cannot illuminate the rear side while the bicycle is stopped, and the presence of the bicycle against other vehicles approaching from the rear side. I can't appeal. Further, the reflectors provided at the rear of the vehicle do not illuminate unless the headlights of other vehicles are illuminated, so that the effect is not sufficient. Also, when the bicycle is stopped sideways with respect to the vehicle approaching from the front and rear, even if the reflector is installed on the side, it will not illuminate unless the headlights of other vehicles are illuminated. There was a drawback that was not enough.

[0014]

[0007]

[0015]

SUMMARY OF THE INVENTION The present invention has been made in view of the above-mentioned drawbacks, and provides a self-powered bicycle light emitting device capable of emitting light even when the bicycle is stopped. .

[0016]

[0008]

[0017]

According to the first aspect of the present invention,
In a bicycle light emitting device including a magnet, an induction coil, a resistor, a capacitor, and a light emitting element, the light emitting element and the resistor are connected in series to the induction coil, and the capacitor is parallel to the light emitting element and the resistor connected in series to the induction coil. The bicycle light emitting device is characterized in that the light emitting element is connected and emits light according to an induction current generated by a magnet and an induction coil.

[0018]

[0009]

[0019]

The present invention is constructed as described above.
According to the invention described above, in a self-powered light emitting device used for a bicycle or the like, when the bicycle is running, the light emitting element emits light and the capacitor is charged according to the induced current generated by the magnet and the induction coil, and the bicycle is cycled. When is stopped, the electric charge charged in the capacitor is discharged and the light emitting element can emit light for a predetermined time.

Therefore, if the light emitting device is used as a headlight, the light can be emitted to the front even when the vehicle is stopped, and the bicycle driver can detect the presence of the bicycle against an oncoming vehicle approaching from the front in a poor visibility environment. You can appeal.

If the light emitting device is used as a tail light, the existence of a bicycle can be sufficiently appealed to other vehicles approaching from behind in an environment with poor visibility.

[0022]

[0010]

[0023]

EXAMPLE An example of the present invention will be described below with reference to FIG. FIG. 1 shows a self-powered bicycle light emitting device according to the present invention. In the figure, reference numeral 1 denotes a light emitting portion, which is attached to a part of a vehicle body that supports the rear wheel of the bicycle and is provided so that the periphery of the rear portion of the bicycle emits light. Reference numeral 2 is a magnet, which is fixed to a part of the spoke or rim of the rear wheel. An induction coil 7 is provided in the light emitting unit 1, and the light emitting diodes 3 and 4 and the resistor 5 are connected in series with the induction coil 7. Further, a capacitor 6 having a relatively large capacity is connected in parallel with the resistor 5 and the light emitting diode 4.

[0024]

Here, the induction coil 7 and the magnet 2 of the light emitting unit 1 are arranged so as to approach or separate from each other according to the rotation of the rear wheel of the bicycle, and the induction coil 7 is magnetized every time the rear wheel makes one rotation. It is arranged so as to interlink with a part of the magnetic flux generated from 2.

When the bicycle runs here, the magnets 2 rotate as the rear wheels rotate. Further, since the induction coil 7 cuts off a part of the magnetic flux generated from the magnet 2 every time the rear wheel makes one rotation, an induction current (AC current) flows inside the coil. Since the polarity of the induced current (AC current) is switched for each half-wave, the light emitting diode 3 emits light when a positive current flows, and stops emitting light when a negative current flows, resulting in intermittent flash of light.

Similarly to the light emitting diode 3, the light emitting diode 4 emits light when a positive current flows when the rear wheel of the bicycle starts to rotate, and stops emitting light when a negative current flows and becomes a flash of intermittent light emission. However, at the same time, the electric charge is accumulated in the capacitor 6 due to the surplus current, so that the electric charge accumulated in the capacitor 6 is released and the closed circuit formed by the resistor 5, the light emitting diode 4 and the capacitor 6 while the negative current flows. Current flows through. Therefore, the light emitting diode 4
Emits light only while current is supplied.

Next, when the positive current flows, the light emitting diode 3 emits light and the capacitor 6 also accumulates electric charges. In this way, the capacitor 6 is gradually charged while repeating charging by the induced current supplied as the bicycle runs and discharging the resistor 5 and the light emitting diode 4. Therefore, the light emitting diode 4 gradually shifts from blinking light to continuous light emission as the bicycle runs. Therefore, while the bicycle is running, the light emitting diode 3 emits a flash of light, and the light emitting diode 4 gradually emits a continuous light from the blinking light, so that attention should be paid to other vehicles approaching from the rear and the presence of the bicycle is sufficiently appealing. can do.

[0028]

Next, when the bicycle temporarily stops at an intersection or the like, the magnets 2 attached to the rear wheels stop and the induction coil 7
No current flows inside. Therefore, the light emitting diode 3 stops emitting light. However, since the electric charge charged during traveling of the bicycle is accumulated in the capacitor 6, the electric charge is discharged to the closed circuit formed by the resistor 5, the light emitting diode 4, and the capacitor 6. Therefore, a current flows through the light emitting diode 4 for a predetermined time in accordance with the time constant set by the resistor 5 and the capacitor 6 to emit light. Further, by adjusting the values of the resistor 5 and the capacitor 6 to predetermined values, for example, at night, while the bicycle user pauses and waits until the signal changes from red to blue at the intersection, the light emitting diode 4
Since it continuously emits light, the presence of a bicycle can be sufficiently appealed to other vehicles approaching from the rear even when the bicycle is stopped.

[0029]

In the self-powered bicycle light emitting device of this embodiment, the light emitting portion is attached to a part of the vehicle body that supports the rear wheel of the bicycle, and the magnet is fixed to a part of the spoke or rim of the rear wheel for running. At times, the magnet was moved to make it a tail light, but the magnet was attached to a part of the vehicle body that supports the rear wheel of the bicycle, and the light emitting part was fixed to a part of the spokes or rim of the rear wheel so that the light emitting part could be moved when traveling. You can In this case, when the bicycle is traveling, the light emitting diode 3 becomes an intermittent flash of light which rotates with the mounting position as the radius with respect to the rotation axis of the rear wheel, and the light emitting diode 4 draws a locus of a bright circle having the mounting position as the radius. In this case, the light emitting diodes 3 and 4 may be arranged so that one of them emits light rearward of the vehicle and the other emits light mainly toward the side of the vehicle.

In this case, there is a visual decoration effect when viewed from the side of the bicycle while driving, and it also serves as a safety measure on the side of the bicycle at night.

The light emitting portion may be embedded on the side surface or the rear side of the main body of the headlight of the bicycle, separately from the headlight.

[0032]

In the present embodiment, the self-powered bicycle light emitting device is used as the taillight, but it is also used as the headlight of the bicycle for the front wheels and the front part of the vehicle body to emit light near the front of the bicycle. You may do it. Also in this case, the light emitting unit 1 may be fixed to the front wheels and rotated during traveling, or may be attached to the front part of the vehicle body to emit light toward the front of the bicycle.

Also in this case, the light emitting diodes 3, 4
However, one may be arranged so as to emit light in the front of the vehicle and the other in the side of the vehicle.

The light emitting diodes may have different emission colors, and a plurality of light emitting diodes may be provided. in this case,
The visual decoration effect during driving is significantly improved.

[0035]

[0015]

[0036]

Since the present invention is configured as described above, according to the invention described in claim 1, in a self-power-generating type light emitting device used for a bicycle or the like, it is generated by a magnet and an induction coil while the bicycle is running. The light emitting element emits light according to the induced current and the capacitor is charged, and when the bicycle is stopped, the charge charged in the capacitor is discharged and the light emitting element can emit light for a predetermined time.

Therefore, if the light emitting device is used as a headlight or a taillight, the light can be emitted forward even when the vehicle is stopped, so that the user of the bicycle can use it in a poor visibility environment.
The presence of a bicycle can be sufficiently appealing to an oncoming vehicle approaching from the front or another vehicle approaching from the back, and a traffic accident or the like can be prevented.

Further, since the light emitting element of the light emitting device is arranged so as to emit light to the side of the bicycle as well, there is a visual decoration effect during running, and it is a safety measure for the side of the bicycle at night, etc. Can be prevented.

[Brief description of the drawings]

FIG. 1 is a self-powered bicycle light emitting device according to the present invention.

FIG. 2 is a conventional self-powered bicycle light emitting device.

[Explanation of symbols]

 1 ... Light emitting part 2 ... Magnet 3 ... Light emitting diode 4 ... Light emitting diode 5 ... Resistor 6 ... Capacitor 7 ... Induction coil

Claims (1)

[Claims] 1. A bicycle light emitting device comprising a magnet, an induction coil, a resistor, a capacitor, and a light emitting element, wherein the light emitting element and the resistor are connected in series to the induction coil, and the capacitor is connected in series to the induction coil. The bicycle light emitting device, wherein the light emitting element and the resistor are connected in parallel, and the light emitting element emits light according to an induction current generated by the magnet and the induction coil.