JPS628401A - Lighting apparatus 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 fields The present invention relates to a lighting device for use on a bicycle.

(b) Conventional technology A conventional lighting device using a secondary battery, for example, as shown in Japanese Utility Model Application Publication No. 58-115479, switches (switches) are turned on and off depending on the brightness outside while driving. Although the power supply from the charging system to the light was controlled, first of all, the user had to turn it on and off each time. Although No. 169503 can automatically turn off the headlights,
It is difficult for the headlights to turn on immediately when driving from a bright place to a dark place, and on the other hand, the headlights do not turn off immediately when driving from a dark place to a bright place, causing unnecessary consumption of the secondary battery. was.

(c) Problems to be Solved by the Invention Therefore, an object of the present invention is to provide a lighting device that can reduce consumption of a secondary battery and efficiently blink a headlamp while in use.

(d) Means for solving the problem The present invention connects a generator, a headlamp, a secondary battery, and an illuminance detection means in parallel to each other, and controls the blinking of the headlamp. Switch means are connected in series, and the response time for opening the switch means is delayed when the illuminance detection means detects a predetermined brightness, and the response time for opening the switch means is shortened when a predetermined darkness is detected. The present invention is characterized in that a time control means for controlling the illuminance is connected between the illuminance detection means and the switch means.

(e) ° Effect When the generator is operated at night and the vehicle is driven from a dark place to a bright place, the time control means delays turning off the switch means to keep the headlights on for as long as possible, and conversely, from a bright place to a dark place. When the vehicle travels to a place, the switch means can be turned on quickly, and the headlights can be turned on quickly.

(f) Example (1) has a headlight (2) consisting of a light bulb (40) at 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 outer surface of the front wheel (4) so that it can be raised or folded freely.

AC power generation that generates electricity from the rotational force of this front wheel (4) at the position*
(5), and the taillight (3) is provided on the mudguard (7) of the rear wheel (6) with the taillight (3) facing rearward, and illuminance detection means (8) made of a solar cell that generates electricity from sunlight (S) is installed upward. It is equipped with a tail light unit (9) that is directed toward the vehicle. A rechargeable secondary battery (10) is installed in the taillight unit (9).
It's decorated. 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. The headlamp (2), the secondary battery (10), and the illuminance detection means (8) are connected in parallel to each other. The generator (5) is an aftereffect generator (1) consisting of diodes (Da) to (Dd>
1) Full wave! Ifi is done. NP through a first diode (Dl) for backflow prevention in series with the illumination lamp (2).
A switch means (T2) consisting of N transistors is connected. A first resistor (R1) and a first PNP transistor are connected between the headlight (2) and the generator (5).
A parallel circuit with a transistor (Tl) is connected. A second resistor (R2) is connected between the collector of the switch means (T2) and the base of the first transistor (T1). The base of the switch means (T2) is connected to the connection point between the third transistor (T3) of the NPN type and the fourth transistor (T4) of the NPN type, and the base of the third transistor (T3) 5 transistors (T
s) and the PNP type sixth transistor (T6) via a third resistor (R3).
), (Rs) is a protective resistance. The third resistor (R
3) is connected to the first capacitor (C1) for charging and discharging. The base of the fourth transistor (T4) and the sixth transistor
It is connected to the collector of the transistor (T@) via a sixth resistor (R6) having a large resistance value. Further, a second capacitor (C2) for charging and discharging is connected between the base and emitter of the fourth transistor (T4), and a second capacitor for backflow prevention is connected in parallel with this second capacitor (C2).
A seventh resistor (with a smaller resistance value) is connected via a diode (D2).
R7) is connected. An eighth resistor (R3) and a ninth resistor (Rv) are connected in parallel with the battery (10), and the base of the sixth transistor (T@) is connected to an intermediate point between these resistors. (Ds) is a third diode (D3) for backflow prevention.

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

To explain the operation of this configuration, when driving at night in a place that is darker than the predetermined brightness, first the generator (5)
The fifth transistor (Ts) and the third transistor (T3) are turned on by the output from the illuminance detection means (8).
), the sixth transistor (Ts) and the fourth transistor (T4) are turned off, so the switch means (T2) is turned on and the headlamp (2) is turned on.

Then, when driving from this dark place to a bright place such as a shopping street, the sixth transistor (T6) is turned on because there is an output from the illuminance detection means (8), and the fourth transistor (T4
), but this fourth transistor (T4
), the current flowing into the base of the resistor (R6
), the full charging time of the second capacitor (C2) becomes longer, and as a result, the fourth transistor (T4)
turns on slowly, and the switch means that used to turn on (
T2) is turned off late, and the headlight (2) is turned off with a delay and remains on for a relatively long time.

On the other hand, when driving from a bright place to a dark place, the output from the illuminance detection means (8) that had been outputting until now disappears and the 6th
When the transistor (Ts) is turned off, the power in the second capacitor (C2) that has been charged up to now is immediately discharged through the seventh resistor (R7), which has a small resistance value.
Therefore, the base potential to the fourth transistor (T4) also disappears immediately, and this fourth transistor (T4) instantly becomes O.
becomes FF, and as a result, the switch means (T2) also immediately turns OFF.
N and instantly turns on the headlight (2).

Here, the operation as described above is performed by the sixth transistor (Ts),
The time control means (A) includes a sixth resistor (Rε), a seventh resistor (R7), a second capacitor (C2), a fourth transistor (T4), and the like.

(G) Effects of the Invention Since the present invention is configured as described above, when driving at night, when moving from a bright place to a dark place, the headlights are immediately turned on, and conversely, when moving from a dark place to a bright place, the headlights are turned on immediately. The headlights do not turn off immediately, but stay on for a relatively long time, so that it is possible to provide an illumination device with extremely good illumination effect when driving on a night road or a shopping street many times in succession.

[Brief explanation of drawings]

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. 5)... Generator, (2>... Headlight, (8)...
・Illuminance detection means, <10)...Secondary battery, (T2)・
...Switch means, (A)...Time control means.

Claims (1)

[Claims] (1) A generator, a headlamp, a secondary battery, and an illuminance detection means are connected in parallel with each other, a switch means for controlling blinking of the headlight is connected in series, and the illuminance detection means is connected in series. The illuminance detection means includes a time control means for delaying the response time for opening the switch means when a predetermined brightness is detected and shortening the response time for closing the switch means when a predetermined darkness is detected. A bicycle lighting device, characterized in that the lighting device is connected between the switch means and the switch means.