JP2000198477A - Illumination lighting control device for bicycle - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an illumination lighting control device for bicycles, by which shortage of illuminance does not occur during low speed traveling, when a lighting system of a bicycle is driven by a bicycle dynamo. SOLUTION: Generated power of a hub-dynamo 1 of a bicycle is rectified by a rectification circuit 2, and rectified output thereof is supplied to a lighting system 3, and battery voltage of a secondary battery 4 is supplied to the lighting system 3 through a switching transistor Q2. Output voltage of the hub-dynamo 1 is pulsed by a pulse forming circuit 7 to be supplied to a microcomputer 6 to calculate the bicycle speed. When the bicycle speed is less than a set speed, the switching transistor Q2 is brought to an operating state, and battery voltage is supplied to the voltage of the hub-dynamo to light and control the lighting system 3. When the bicycle speed exceeds the set speed, the switching transistor Q2 is brought to an off state, and the lighting system 3 is allowed to light by only the hub-dynamo voltage.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a lighting control device for a bicycle, which controls lighting of a lighting device such as a headlight with electric power generated by a dynamo for a bicycle.

[0002]

2. Description of the Related Art As a conventional bicycle lighting control device, there is, for example, one described in Japanese Patent Application Laid-Open No. 8-164787. In this conventional example, a generator that generates electric power by rotation of wheels, a battery that is a power source that generates electric power, an illumination light that is turned on by the electric power generated by the generator and the battery, and a power supply between the generator and the illumination light A first switch means connected to the battery, a second switch connected between the battery and the illumination lamp, and an automatic lighting / extinguishing circuit for switching the first switch means according to ambient brightness. When the vehicle is running at normal speed at night, the generator and the lighting lamp are connected by the first switch means, and the battery is connected to the battery by the second switch means at low speed running at night and at a fixed time after a night stop. There is described a bicycle lighting device including switching control means for controlling switching so as to connect to a lighting lamp.

[0003]

However, in the above-mentioned prior art, when the bicycle is running at night at low speed and for a certain time after the running is stopped, the electric power of the battery is supplied to the illumination lamp to turn it on. When the vehicle travels at a high speed, the power generated by the generator is supplied to the lamp instead of the battery, and the lamp is lit.When the vehicle is running at low speed, the lamp is lit only by the battery power. When the set voltage for switching from the power of the generator to the power of the generator is set to a low value, the power of the generator is a pulsating current, and the illumination light flickers and the light emission by the generator is reduced with respect to the light emission by the battery. Therefore, it is necessary to set a higher voltage for switching the power, and there is an unsolved problem that the power consumption of the battery is increased and the battery life is shortened.

Accordingly, the present invention has been made in view of the above-mentioned unsolved problems of the prior art. When the vehicle is running at low speed, the shortage of the power generated by the bicycle dynamo is replenished with the power of the battery. It is an object of the present invention to provide a bicycle lighting control device that can extend the life of a battery while maintaining a predetermined light amount in the device.

[0005]

According to a first aspect of the present invention, there is provided a lighting control apparatus for a bicycle, comprising: a bicycle dynamo mounted on a bicycle; and a voltage generated by the bicycle dynamo. A lighting device for controlling lighting of a bicycle, comprising: a lighting device for controlling lighting of the lighting device, wherein the controlling device rectifies the power generated by the dynamo for bicycle and supplies the rectified output to the lighting device; A battery that supplies dc power to replenish the rectified output via the switching means between the rectifying means and the lighting device to light the lighting device at a predetermined illuminance, and is driven by the power of the rectifying device and the battery; A lighting control circuit for controlling the switching means and the lighting device based on an output signal of the bicycle dynamo is provided.

A bicycle lighting control device according to a second aspect of the present invention includes a bicycle dynamo mounted on a bicycle, and control means for controlling lighting of the lighting device with a voltage generated by the bicycle dynamo. In the bicycle lighting control device, the control unit rectifies the power generated by the bicycle dynamo and supplies the rectified output to the lighting device; and a switching unit between the rectifying device and the lighting device. A battery for supplying DC power to replenish the rectified output through the illuminating device at a predetermined illuminance, vehicle speed detecting means for detecting a vehicle speed of the bicycle, light amount detecting means for detecting the amount of ambient light, Means for driving the bicycle when the vehicle speed detection means detects the running state of the bicycle, and when the light quantity of the light quantity detection means is equal to or less than a set value. It is characterized in that a lighting control circuit for controlling the switching means and the illuminating device on the basis of the dynamo output signal.

In a third aspect of the present invention, the lighting control circuit includes a vehicle speed detecting means for detecting a vehicle speed based on a frequency of the bicycle dynamo. And when the vehicle speed detected by the vehicle speed detection means is in a low vehicle speed range where the vehicle speed is equal to or less than a set vehicle speed, the switching means is operated to supply the electric power of the battery to the lighting device. It is characterized by.

Further, according to a fourth aspect of the present invention, in the lighting control apparatus for a bicycle according to the third aspect, the lighting control circuit performs duty control of the switching means at a duty ratio corresponding to a vehicle speed. It is characterized by the following. Still further, in the bicycle lighting control apparatus according to claim 5, in the invention according to any one of claims 2 to 4, the lighting control circuit is configured such that when the vehicle speed detected by the vehicle speed detecting means becomes zero, It is characterized in that the lighting control of the lighting device is continued for a predetermined time.

According to a sixth aspect of the present invention, in the lighting control apparatus for a bicycle according to any one of the first to fifth aspects, the lighting control circuit monitors an output voltage of the rectifying means, and And an overvoltage prevention means for maintaining a voltage applied to the power supply at a rated voltage. Further, the lighting control device for a bicycle according to claim 7 is the invention according to any one of claims 2 to 6, wherein the lighting control circuit has lighting setting means for setting a lighting mode of the lighting device, When the vehicle speed calculated by the vehicle speed detection unit is zero, and when the lighting mode is set by the lighting setting unit, the lighting device is configured to control the lighting with the power of the battery. I do.

Further, a lighting control apparatus for a bicycle according to claim 8 is the invention according to any one of claims 1 to 7, wherein the lighting control circuit comprises a rechargeable battery. A charging switching means between the bicycle dynamo and the secondary battery, and when the output voltage of the rectifying means is equal to or higher than a set voltage, the charging switching means is operated to charge the secondary battery. It is characterized by having such a configuration.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. FIG. 1 is a circuit diagram showing an electrical connection relationship in one embodiment of the present invention. In the drawing, reference numeral 1 denotes a hub dynamo as a bicycle dynamo built in a hub of a front wheel serving as a non-driving wheel of the bicycle. An AC signal having a frequency corresponding to the rotation speed of the front wheel, that is, a vehicle speed is output from the hub dynamo 1. Is done.

The output side of the hub dynamo 1 has a negative output.
Diode bridge for full-wave rectification with grounded power terminals
Input terminal of rectifier circuit 2 as rectifier means composed of a circuit
Child t _i1And t_i2Is connected to the output terminal of the rectifier circuit 2.
t_o1And t_o2To the positive line L_PAnd negative line L_N
Are connected, and these positive side lines L_PAnd negative line
L_NHeadlight 3 as a lighting device and its energization
PNP-type switching element as an energization control element
The transistor Q1 is connected in series.

A headlight 3 and a switching transistor Q1 are connected to the positive line L _P and the negative line L _N , respectively.
Is connected in parallel with a series circuit of a rechargeable secondary battery 4 such as an alkaline manganese storage battery or an alkaline storage battery and an NPN-type switching transistor Q2 as a discharging switching means, and a charging switching means in parallel with the switching transistor Q2. Is connected to a PNP-type switching transistor Q3.

Furthermore, one end, with are connected to the positive line L _P via the diode D1, the secondary battery 4
Is connected via a main switch SW _M and a diode D2, and the other end is connected to a negative line _LN; and a constant voltage zener diode connected in parallel with both ends of the charging capacitor C. A control power supply circuit 5 composed of a ZD and the control power supply circuit 5 is provided, and output power of the control power supply circuit 5 is supplied as operation power to a microcomputer 6 as a lighting control circuit.

The microcomputer 6 receives a pulse signal from a pulse forming circuit 7 for half-wave rectifying the output voltage of the hub dynamo 1 to form a pulse signal, and detects the amount of light around the bicycle. A light amount detection signal of a light amount detection circuit 8 serving as a light amount detection unit, and either the hub dynamo voltage V _H output from the rectifier circuit 2 selected by the multiplexer 9 or the output voltage V _B of the secondary battery 4 are converted into a digital signal. The output signal of the A / D converter 10 to be converted is input, and each of the switching transistors Q1 to Q
Control signal CS ₁ to CS ₃ for controlling 3 is output.

Here, the pulse forming circuit 7 includes a diode D3 for half-wave rectifying the output voltage of the hub dynamo 1, a resistor R1 connected between the cathode side of the diode D3 and the installation, and a diode D3. The connection point of the resistor R1 and the resistor R1 is connected to the base, the collector is connected to the positive line L _P via the resistor R2, and the emitter is grounded.
When the half-wave output of the hub dynamo 1 is lower than a predetermined voltage, the switching transistor Q4 is maintained in an off state, and the collector voltage of the hub dynamo 1 is reduced to the hub dynamo 1 and the secondary battery. 4 is maintained at a high level which is the lighting voltage of the headlamp 3 formed by the switch 4 and when the half-wave output of the hub dynamo 1 becomes equal to or higher than a predetermined voltage from this state, the switching transistor Q4 switches to the ON state, The collector voltage becomes the ground level, and a pulse signal PS having a cycle corresponding to the frequency of the half-wave output of the hub dynamo 1 is input to the microcomputer 6.

The light amount detection circuit 8 has an NP connected to the terminal V _DD to which the power of the control power supply circuit 5 is supplied via the collector resistor R5.
N-type phototransistor PT and this transistor P
A microcomputer includes a charge / discharge capacitor C2 connected between the collector and the emitter of T. The microcomputer detects a light amount detection signal SL from the collector of the phototransistor PT, which is low when the surroundings are bright and high when dark. 6 is output.

The microcomputer 6 receives a switch signal SS of a lighting setting switch 11 as lighting setting means for setting a lighting mode of a lighting device provided near a handle (not shown). The switch signal SC of the charge selection switch 12 for selecting whether or not to charge the secondary battery is input. Further, the microcomputer 6 is connected to a small liquid crystal display device 13 provided near a steering wheel (not shown). The small liquid crystal display device 13 displays vehicle speed data, mileage data, battery replacement warning, and the like. I am trying to do it.

The microcomputer 6 detects the vehicle speed on the basis of the pulse signal PS from the pulse forming circuit 7 and has a small amount of light detected from the light sensor 8 and needs to control the lighting of the headlight 3. When it is determined,
In a low vehicle speed range lower than the set vehicle speed based on the detected vehicle speed, the power shortage caused by the hub dynamo 1 is supplemented by the power of the secondary battery 4 and supplied to the headlight 3 so that the headlight 3 starts running. From this state, the vehicle is turned on at the rated illuminance. From this state, the replenishment of the rechargeable battery 4 is reduced in accordance with an increase in the amount of power generated by the hub dynamo 1 due to an increase in the vehicle speed. In response to this, the secondary battery 4 is charged as necessary, and the power supplied to the headlight 3 is suppressed from becoming higher than the rated value. Lighting control is performed such as keeping the lighting state of the lamp 3 for a predetermined time.

Next, the operation of the above embodiment will be described with reference to the microcontroller.
FIG. 2 shows a vehicle speed calculation process executed by the computer 6 and FIG.
A description will be given together with the lighting control process shown in FIG. That is,
In the micro computer 6, the main switch SW_MThrow
Is supplied and DC power is supplied from the control power supply circuit 5.
And the lighting control process of FIG.
This is executed as a program.
The light amount detection signal SL around the bicycle detected by the sensor 8 is read.
Then, the process proceeds to step S2 to detect the read light amount.
It is determined whether the signal SL is at a high level or not.
Sometimes, the surroundings are bright and the headlights 3 need to be turned on
It is determined that there is not any
For example, a control signal S having a logical value "1"
_MAnd outputs the battery voltage V from the secondary battery 4._BA / D
Read via the converter 10, then go to step S4
And battery voltage V_BIs a preset threshold for battery capacity shortage
Value voltage V_BSIt is determined whether it is less than_B<V_BSIn
When it is determined that the battery capacity is insufficient, step S
5 and the battery capacity is insufficient for the liquid crystal display device 13.
Is output, and the process proceeds to step S6, where V
_B≧ V_BS, It is judged that the battery capacity is sufficient.
Then, the process directly proceeds to step S6.

Step S6 is a vehicle speed detection process which is separately executed as an interrupt process for the main program.
The vehicle speed V _SP detected based on the number of pulses per unit time of the pulse signal PS input from the pulse generation circuit 7 or the elapsed time from one pulse to the next pulse is obtained.
Is read, and then the process proceeds to step S7, in which the vehicle speed _VSP data is output to the liquid crystal display device 13;
Return to 1.

On the other hand, when the result of determination in step S2 is that the light amount detection signal is at a high level,
Is determined to be necessary, the process proceeds to step S8, the vehicle speed _VSP is read in the same manner as in step S6 described above, and then the process proceeds to step S9 to determine whether the vehicle speed _VSP is "0". Is determined, and when V _SP = 0, it is determined that the bicycle is stopped, and the process proceeds to step S10.

In this step S10, the switch signal SS of the lighting setting switch 11 is read, and then in step S10.
Then, it is determined whether or not the switch signal SS is on, and if it is on, it is determined that there is an intention to turn on the headlight 3, and the process proceeds to step S1.
2, the switching transistors Q1, Q2
Is turned on and the switching transistor Q3 is turned off, and the process returns to step S1. When the switch signal SS is off, it is determined that there is no intention to turn on the headlight 3. And step S
13, the switching transistors Q1 to Q1
After both Q3 are turned off, the process returns to step S1.

The result of the determination in step S9 is V _SP >
When it is 0, it is determined that the bicycle is running,
The process proceeds to step S14, and when the vehicle speed V _SP is less than or equal to the set vehicle speed V _SET corresponding to a voltage sufficient to exceed the battery voltage V _B of the secondary battery 4 when the hub dynamo voltage V _H output from the rectifier circuit 2 is preset. It is determined whether or not there is, and if V _SP ≦ V _SET, it is determined that the hub dynamo voltage V _H is lower than the voltage at which the headlight 3 is turned on at the rated illuminance. Duty ratio D corresponding to _SP
2 is calculated with reference to a duty ratio calculation map indicating the relationship between the vehicle speed V _SP and the duty ratio D ₂ stored in advance in a memory, for example, and then the process proceeds to step S16, where the duty ratio D with ₁ outputs a control signal becomes 100% or oN state will be described later from the output of the control signal of the duty ratio D ₂ calculated in step S15 with respect to transistor Q2 step S2
Move to 5.

On the other hand, the result of the determination in step S14 is
If V _SP > V _SET, it is determined that the hub dynamo voltage V _H output from the billing circuit 2 is a voltage sufficient to turn on the headlight 3 and the process proceeds to step S17. In this step S17, a selection signal S _M having a logical value “0” is output to the multiplexer 9 and the hub dynamo voltage V _H output from the rectifier circuit 2 is read via the A / D converter 10, and then the step S17 is performed. S18 proceeds to determines whether read elaborate hub dynamo voltage V _H is equivalent to the set voltage V _HS than the allowable voltage of the headlamp 3 that is set in advance, V _H
If <V _HS , it is determined that the hub dynamo voltage V _H is an appropriate voltage, and the process proceeds to step S19, where the duty ratio D ₁ = 100% for the transistors Q1 and Q2.
That is, after outputting a control signal for turning on and D ₂ = 0%, ie, turning off, the process proceeds to step S21, where V _H ≧ V _HS
When it is determined that the hub dynamo voltage V _H is too high, the process proceeds to step S20, and the predetermined duty ratio D ₁ is applied to the transistor Q1 so that the hub dynamo voltage V _H becomes lower than the set voltage V _HS. After the control signal is output, the process proceeds to step S21.

In step S21, the charge selection switch 1
2 is read, and then step S22
It is determined whether or not the switch signal SC is in the on state. If the switch signal SC is in the off state, the flow directly proceeds to step S25 described later. If the switch signal SC is in the on state, the secondary battery 4 is charged. The process proceeds to step S23 to determine whether or not the hub dynamo voltage V _H is equal to or higher than the set voltage V _HC sufficient to charge the secondary battery 4 higher than the set voltage V _SET , and V _H ≧ If V _HC , the process proceeds to step S24 to output a control signal for turning on the transistor Q3, and then to step S25 described later. If V _H <V _HC , it is determined that the voltage is unstable. Then, the process directly proceeds to step S25.

In step S25, the aforementioned step S
The light amount detection signal SL of the light amount sensor 8 is read in the same manner as 1 and
Next, the process proceeds to step S26, and the process proceeds to step S26.
Similarly to 2, it is determined whether or not the light amount detection signal SL is at a high level. When the signal is at a low level, it is determined that the surroundings are bright and the headlight 3 does not need to be kept on. Move to step S27.

In this step S27, the transistor Q
By outputting predetermined time for example a control signal in a period longer than the period of the duty ratio D ₁ described above repeatedly turned on and off 1 (e.g. 1 minute), from said flashing drive the headlamps 3 step S1 Return to If the result of the determination in step S26 is that the lighting control of the headlamp 3 is to be continued when the light amount detection signal SL is at a high level, the process proceeds to step S28, where the vehicle speed _VSP is "0". It is determined whether or not there is, and when this is "0", it is determined that the vehicle is in a stopped state and the process proceeds to step S27.
Return to 14.

Therefore, the main switch S
_Assuming that the bicycle is stopped with WM turned off, in this state, the front wheel serving as a non-driving wheel is stopped, so that the hub dynamo 1 is in the power generation stopped state and the AC signal is not output. Therefore, a DC output voltage cannot be obtained from the rectifier circuit 2. In this state, since the main switch SW _M is in the off state, the output voltage of the secondary battery 4 is not supplied to the control power supply circuit 5, and the output voltage of the control power supply circuit 5 is “0”. 6, the control power is not supplied to the A / D converter 10, the liquid crystal display device 13 and the like, and these are in an operation stop state, and the headlight 3 is also in an off state.

When the main switch SW _M is turned on in this stopped state, the output voltage of the secondary battery 4 is supplied to the control power supply circuit 5, whereby the capacitor C is charged, and the voltage is made constant by the Zener diode ZD. Then, microcomputer 6, A / D converter 10, liquid crystal display device 1
Control power is supplied to 3 and the like. For this reason, the microcomputer 6 enters an operating state, and the lighting control processing of FIG. 2 is executed. At this time, since it is daytime, the light amount detection circuit 8
Because of the phototransistor PT maintains the light quantity detection signal SL is also low in the ON state, in the lighting control processing of FIG. 2, and proceeds from step S2 to step S3, reads the battery voltage V _B, which is the threshold it is determined whether the below voltage V _BS, when a V _B ≧ V _BS, the secondary battery 4
Is determined to be sufficient, and the vehicle speed V _SP of “0” is displayed on the liquid crystal display device 13 (steps S6 and S7).

At this time, the result of the determination in step S4 is V
_B<V_BSIf it is, the process proceeds to step S5,
Warning display indicating insufficient battery voltage on the crystal display device 13
Can alert the rider and visually recognize this warning
Charge switch for charging the rechargeable battery 4
When the switch 12 is turned on, the vehicle speed V
_SPIs the set vehicle speed V_HCWhen it becomes above, for switching
When the transistor Q3 is turned on, the rectifier circuit 2
Output hub dynamo voltage V_HRechargeable battery 4
Charged.

As a result, since the transistors Q1 and Q2 maintain the off state, the headlight 3 continues to be turned off. When moving the bicycle from the stopped state, the output generated power corresponding to the running speed from the hub dynamo 1 according to this, it is rectified by the rectifier circuit 2 hub dynamo voltage V _H and rises.

However, even in this state, since the light amount detection signal SL of the light amount detection circuit 8 maintains the low level, the steps S1 to S7 are repeated, the vehicle speed is displayed on the liquid crystal display device 13, and the transistors Q1 and Q2 maintains the off state, and headlight 3 maintains the off state. When the vehicle travels in a place where the amount of light is small, such as a tunnel or a road, in the daytime running state, the phototransistor PT of the light amount detection circuit 8 is turned off in response to this, so that the charging capacitor C2 is charged. State
When the charging voltage becomes high and the light amount detection signal SL becomes a high level, in the lighting control process of FIG.
Then, the process proceeds to step S8, and since the vehicle speed V _SP is greater than “0”, the process proceeds to step S14.

At this time, when the bicycle is traveling at a speed exceeding the threshold speed V _SET (for example, 10 km / h), the power generated by the hub dynamo 1 is sufficient to turn on the headlight 3, so that step S14 is performed. To step S17
Proceeds to read the hub dynamo voltage V _H, but when it is less than the set voltage V _HS, as is proper voltage, the process proceeds to step S19, the duty ratio D ₁ control signal for transistor Q1 is 100% Become,
Transistor Q1 is controlled to the ON state, the control signal for the transistor Q2 is controlled to be off duty ratio D ₂ is 0%, the transistor Q2 is controlled to be off.

Therefore, an energizing path for the headlamp 3 is formed, and an energizing path from the secondary battery 4 to the headlamp 3 is cut off, so that the hub dynamo voltage V _H is supplied to the headlamp 3. This lights up. When the vehicle speed V _SP is _lower than the set vehicle speed V _SET, it is determined that the power required by the headlight 3 cannot be supplied by the hub dynamo voltage V _H , and the process proceeds to step S15, where the vehicle speed V _SP the calculated corresponding duty ratio D _2, then the processing proceeds to step S16, the transistor Q1 and the duty ratio D ₁ is controlled to 100% is turned on, the duty ratio D ₂
Is controlled to the value calculated in step S15, and the vehicle speed V
Insufficient voltage is replenished from the secondary battery 4 according to the _SP , and the headlight 3 is lit brightly at the rated illuminance.

On the other hand, when the bicycle starts running at night, when the bicycle is stopped, the vehicle speed _VSP is "0" even if the light amount detection signal SL of the light amount detection circuit 8 becomes high. The process proceeds from step S9 to step S10,
The switch signal SS of the lighting setting switch 11 is read, and when this is on, it is determined that the rider intends to turn on the headlight 3 and the process proceeds to step S12 to turn on the transistors Q1 and Q2. by controlling it is turned brightly headlamp 3 in the battery voltage V _B of the battery 4.

On the other hand, when the lighting setting switch 11 is in the off state, the transistors Q1 to Q3 are controlled to be in the off state, and the off state of the headlight 3 is continued. From this stopped state, by the rider pedaling, starting traveling, since the vehicle speed V _SP is increased, the process proceeds from step S9 to step S14, similar to the running state of a tunnel or the like described above, the vehicle speed V _SP Is lower than the set vehicle speed V _SE , the hub dynamo voltage V _H is in a low state.
Is smaller duty ratio D ₂ calculated in accordance with the increase of the vehicle speed V _SP, since this is supplied to the transistor Q2,
The shortage of the hub dynamo voltage V _H is compensated for by the battery voltage V _B of the secondary battery 4, so that the headlight 3 can be turned on brightly, and the visibility in front of the bicycle can be significantly improved as compared with the conventional example described above. The vehicle can be improved and safe driving can be ensured.

Thereafter, the hub dynamo 1 is increased with increasing vehicle speed.
By also generated power increases, the reduced replenishment voltage by the battery voltage V _B of the battery 4, the vehicle speed V _SP is set vehicle speed V
When the state of exceeding the above _SET, the process proceeds to step S18 through step S17 from step S14, when the hub dynamo voltage V _H is less than the allowable voltage V _HS becomes transistor Q1 is turned on in step S19, the transistor Q2 is turned off By being in the state, the secondary battery 4
The power supply path to the headlight 3 is cut off, and only the hub dynamo voltage V _H is supplied to the headlight 3, and the lighting control thereof is continued, thereby preventing power consumption of the secondary battery 4. Battery life can be extended.

In this high-speed running state, the vehicle is driven downhill.
And further vehicle speed V_SPIncreases and is output from the rectifier circuit 2.
Hub dynamo voltage V_HIs the threshold voltage V_HSThen,
The process proceeds from step S18 to step S20, and
The duty ratio D of the transistor Q1 ₁Is the hub dynamo voltage V_H
Is the threshold voltage V_HSIs controlled to be less than the headlight 3
To prevent overvoltage exceeding the rated voltage.
Stop and surely prevent the lamp from running out.

[0040] Then, the red light or the like at an intersection, when stopped by reducing the speed of the bicycle, the electric power generated by the hub dynamo 1 is decreased by a decrease in vehicle speed, the vehicle speed V _SP is less than the set vehicle speed V _SET, The headlamp 3 can be maintained in a bright state even after being stopped by returning to the voltage assisted state by the secondary battery 4. Thereafter, when the vehicle speed _VSP becomes "0", the process proceeds from step S28 to step S27, in which the headlight 3 is controlled to blink for one minute, and it is more certain that other vehicles such as automobiles around the intersection have a bicycle. This makes it possible to prevent a car accident when the vehicle turns left or an accident when turning right, thereby improving safety.

In this state, when the vehicle starts running with a green signal, the headlight 3 is turned on brightly by replenishing the power generated by the hub dynamo 1 with the secondary battery 4 immediately after the start of running as in the case described above. When the bicycle is stopped after that, the headlight 3 can be kept lit for about one minute, so that the bicycle can be easily stored in a bicycle parking facility or the like. ,
When further illumination is required, the headlight 3 can be turned on by turning on the lighting setting switch 11.

Further, in a state where the bicycle is traveling at a vehicle speed V _SP exceeds the set vehicle speed V _SET, when the charge selecting switch 12 is turned on, the process proceeds from step S22 to step S23, the hub dynamo voltage When V _H is equal to or higher than the set voltage V _HC , the transistor Q3 is controlled to be turned on, and the hub dynamo voltage V _H is supplied to the secondary battery 4, so that charging is started and the battery voltage shortage occurs. Can be eliminated.

[0043] Thus, according to the above embodiment, the microcomputer 6 detects the vehicle speed V _SP based on the pulse signals PS from the pulse forming circuit 7 based on the output voltage of the hub dynamo 1, the vehicle speed V _SP Secondary battery 4 based
Since it is determined whether or not to perform voltage replenishment from the vehicle, it is possible to detect an accurate vehicle speed V _SP according to the rotation of the hub dynamo 1 and accurately perform voltage replenishment of the secondary battery 4, An appropriate voltage can be supplied to the headlamp 3, and a change in illuminance due to flickering of the headlamp 3 and voltage fluctuation can be reliably prevented.

Incidentally, by monitoring the hub dynamo voltage V _H output from the rectifier circuit 2, it can be determined whether or not the secondary battery 4 performs voltage supplement. In this case, the rectifier circuit is used. Dynamo voltage V output from 2
_Although the fluctuation of _H is relatively large, stable determination cannot be performed, and the voltage supplied to the headlight 3 fluctuates, causing a problem of flickering and illuminance change.
Since the vehicle speed is detected based on the frequency of the output voltage of the hub dynamo and the replenishment of the rechargeable battery 4 is determined based on the detected vehicle speed, an accurate determination can be made.

In the above embodiment, the replenishment voltage of the secondary battery 4 is supplied to the headlight 3 by duty-controlling the switching transistor Q2. It can be replenished by the amount, and the power consumption of the secondary battery 4 can be reduced as much as possible. Further, in the above-described embodiment, since the hub dynamo built in the hub of the non-drive wheel is applied as the bicycle dynamo, the effect of reducing the burden on the rider can be obtained.

In the above embodiment, the case where the battery voltage is monitored when the surroundings are bright has been described. However, the present invention is not limited to this. The display device has a luminosity such as a light emitting diode. When using a display device, it can be seen even in darkness such as at night,
The battery voltage may be monitored during the lighting control of the headlight 3. Further, when a secondary battery is used,
When the battery voltage is low, the charging mode may be automatically set.

In the above embodiment, the headlight 3
When the bicycle is stopped in the lighting control state, the headlight 3
Has been described for blink control for about 1 minute, but the duration and blink cycle can be set arbitrarily.
Irrespective of the blinking control, the lighting state may be maintained, or the supply voltage to the headlight 3 may be reduced, so that the lighting is performed slightly darker.

Further, in the above-described embodiment, the case where the headlight 3 is controlled to be turned on has been described. However, the present invention is not limited to this, and an auxiliary lighting device such as a light emitting diode that illuminates the side and rear of the bicycle is provided. They may be provided to control the lighting of the headlights simultaneously or individually. Furthermore, in the above embodiment, the case where the bipolar transistor is applied as the control element has been described. However, the present invention is not limited to this, and it goes without saying that another control element such as a field effect transistor can be applied. .

Furthermore, in the above embodiment, the case where the light amount detection circuit 9 includes the phototransistor PT has been described. However, the present invention is not limited to this, and an optical sensor such as a photodiode or CdS may be applied. can do. Further, in the above embodiment, the case where the hub dynamo 1 is applied as the bicycle dynamo has been described. However, the present invention is not limited to this, and it goes without saying that a dynamo that contacts the side surface of the front wheel may be applied. .

Further, in the above-described embodiment, the case where the rechargeable battery 4 is applied as the battery has been described. However, the present invention is not limited to this, and it is not possible to use a rechargeable alkaline battery, manganese battery, or the like. In this case, the charge selection switch 11 and the charging transistor Q3 can be omitted. Furthermore,
In the above embodiment, the case where the vehicle speed is detected based on the output voltage of the hub dynamo 1 has been described. However, the present invention is not limited to this, and the vehicle speed may be detected by detecting the rotation of the wheels. .

[0051]

As described above, according to the first aspect of the present invention, the control means rectifies the power generated by the bicycle dynamo and supplies the rectified output to the lighting device; A battery that supplies dc power to replenish the rectified output via the switching means between the rectifying means and the lighting device via the switching means and light the lighting device at a predetermined illuminance; and a battery driven by the power of the rectifying means and the battery. And a lighting control circuit for controlling the switching means and the lighting device based on the output signal of the bicycle dynamo. If the voltage is lower than the rated voltage of the bicycle dynamo, the lighting power of the lighting device can be controlled by supplementing the power shortage of the bicycle dynamo with the primary battery, immediately after the bicycle runs or immediately before the bicycle stops. Also, the headlight can be turned on brightly, and since the power generated by the dynamo for the bicycle and the power of the battery are used together, the power consumption of the battery can be suppressed and the battery life can be extended, Furthermore, since the output signal of the bicycle dynamo is a signal having a frequency proportional to the rotation of the wheels, an effect is obtained in that the switching means and the lighting device in the lighting control circuit can be accurately controlled.

According to a second aspect of the present invention, there is provided a bicycle lighting device comprising: a bicycle dynamo mounted on a bicycle; and control means for controlling lighting of the lighting device with a voltage generated by the bicycle dynamo. In the lighting control device, the control unit rectifies the power generated by the dynamo for a bicycle and supplies the rectified output to the lighting device, and a switching unit between the rectification unit and the lighting device via the switching unit. A battery that supplies DC power to replenish the rectified output and turn on the lighting device at a predetermined illuminance, a vehicle speed detecting unit that detects a vehicle speed of the bicycle, a light amount detecting unit that detects a surrounding light amount, the rectifying unit and the rectifying unit. The bicycle dynamo is driven by electric power of a battery, and when the running speed of the bicycle is detected by the vehicle speed detecting means and the light amount of the light amount detecting means is equal to or less than a set value, the bicycle dynamo is output. With the configuration including the switching means and the lighting control circuit for controlling the lighting device based on the signal, in addition to the effect of the invention according to claim 1, the running state of the bicycle can be accurately detected by the vehicle speed detecting means. It is possible to perform the lighting control accurately, and it is possible to perform an accurate lighting control, and it is possible to automatically control the lighting of the headlight when the lighting of the headlight is required when the bicycle is running. .

Further, according to the third aspect of the present invention, the lighting control circuit has a vehicle speed detecting means for detecting a vehicle speed based on a frequency of the bicycle dynamo, and the vehicle speed detected by the vehicle speed detecting means is set. When the vehicle speed is lower than the vehicle speed, the switching means is set to the operating state, and the power of the battery is supplied to the lighting device. The vehicle speed can be detected and the operation of the switching means can be controlled based on the vehicle speed, so that the operation of the switching means can be accurately controlled regardless of the voltage fluctuation of the bicycle dynamo.

According to the fourth aspect of the present invention, the lighting control circuit controls the duty ratio of the switching means at a duty ratio corresponding to the vehicle speed. , The power consumption of the battery can be suppressed, and the life can be prolonged. Still further, according to the invention according to claim 5, the lighting control circuit is configured to continue the lighting control of the lighting device for a predetermined time when the vehicle speed detected by the vehicle speed detecting means becomes zero. Therefore, it is possible to maintain the lighting state of the lighting device during a temporary stop due to a red light at the intersection, and to make sure that surrounding vehicles, etc., can visually recognize the existence of bicycles, and This can be prevented beforehand, and the storage in the bicycle parking facility or the like after the stop can be easily performed.

According to a sixth aspect of the present invention, the lighting control circuit includes an overvoltage prevention unit that monitors an output voltage of the rectification unit and maintains a voltage applied to the lighting device at a rated voltage. Therefore, it is possible to obtain an effect that it is possible to reliably prevent the lamp from being cut off due to an overvoltage acting on the lighting device and to ensure safe driving. Further, according to the invention according to claim 7, the lighting control circuit has lighting setting means for setting a lighting mode of the lighting device, the vehicle speed calculated by the vehicle speed detecting means is zero, and When the lighting mode is set by the lighting setting means, the lighting device is configured to be controlled to be turned on by the power of the battery, so that in a stopped state such as at night, the lighting device can be turned on when desired, The effect is obtained that the key can be easily released.

Further, according to the invention of claim 8, the battery is constituted by a rechargeable secondary battery, and the lighting control circuit includes a charging switching means between the bicycle dynamo and the secondary battery. When the output voltage of the rectifying unit is equal to or higher than a set voltage, the charging switching unit is operated to charge the secondary battery. By doing so, an effect is obtained that a reduction in battery capacity can be reliably prevented.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an electrical connection relationship according to an embodiment of the present invention.

FIG. 2 is a flowchart illustrating an example of a lighting control process of the microcomputer in the embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hub dynamo (bicycle dynamo) 2 Rectifier circuit 3 Headlight (illumination device) 4 Secondary battery 5 Control power supply circuit 6 Microcomputer 7 Pulse formation circuit 8 Light quantity detection circuit (light quantity detection means) 11 Lighting setting switch 12 Charging selection Switch 13 liquid crystal display

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor Yuji Yamazaki 1-1-1 Shimomachiya, Chigasaki City, Kanagawa Prefecture Inside Miyata Kogyo Co., Ltd. (72) Riki Sekimoto 1-1-1 Shimomachiya, Chigasaki City, Kanagawa Prefecture Miyata Industrial Co., Ltd. F-term (reference) 3K039 AA08 BA01 DC02

Claims (8)

[Claims] 1. A lighting control device for a bicycle, comprising: a dynamo for a bicycle mounted on a bicycle; and control means for controlling the lighting of the lighting device with a voltage generated by the dynamo for the bicycle. Rectifying means for rectifying the power generated by the bicycle dynamo and supplying the rectified output to the lighting device; and supplementing the rectified output between the rectifying device and the lighting device via a switching means to provide the lighting device. A battery that supplies DC power for lighting at a predetermined illuminance, and a lighting control circuit that is driven by the power of the rectifier and the battery and controls the switching means and the lighting device based on an output signal of the bicycle dynamo. A lighting control device for a bicycle, comprising: 2. A lighting control device for a bicycle, comprising: a dynamo for a bicycle mounted on a bicycle; and control means for controlling the lighting of the lighting device with a voltage generated by the dynamo for the bicycle. Rectifying means for rectifying the power generated by the bicycle dynamo and supplying the rectified output to the lighting device; and supplementing the rectified output between the rectifying device and the lighting device via a switching means to provide the lighting device. A battery for supplying DC power to be turned on at a predetermined illuminance, a vehicle speed detecting unit for detecting a vehicle speed of the bicycle, a light amount detecting unit for detecting a surrounding light amount, and the vehicle speed detecting device driven by the power of the rectifying unit and the battery; Means for detecting the running state of the bicycle, and when the light amount of the light amount detection means is equal to or less than a set value, the switching means is output based on the output signal of the bicycle dynamo. A lighting control device for a bicycle, comprising: a step and a lighting control circuit for controlling the lighting device. 3. The lighting control circuit has a vehicle speed detecting means for detecting a vehicle speed based on a frequency of a bicycle dynamo, and when the vehicle speed detected by the vehicle speed detecting means is in a low vehicle speed region where the vehicle speed is equal to or lower than a set vehicle speed. The lighting control device for a bicycle according to claim 1 or 2, wherein the switching means is operated to supply the electric power of the battery to the lighting device. 4. The lighting control apparatus for a bicycle according to claim 3, wherein said lighting control circuit performs duty control of said switching means at a duty ratio corresponding to a vehicle speed. 5. The lighting control circuit according to claim 2, wherein the lighting control of the lighting device is continued for a predetermined time when the vehicle speed detected by the vehicle speed detecting means becomes zero. The lighting control device for a bicycle according to any one of claims 1 to 4. 6. The lighting control circuit according to claim 1, further comprising an overvoltage preventing unit that monitors an output voltage of the rectifying unit and maintains a voltage applied to the lighting device at a rated voltage. 6. The lighting control device for a bicycle according to any one of the above items 5. 7. The lighting control circuit has lighting setting means for setting a lighting mode of the lighting device, a vehicle speed calculated by the vehicle speed detecting means is zero, and the lighting mode is set by the lighting setting means. The lighting control device for a bicycle according to any one of claims 2 to 5, wherein when set, the lighting device is controlled to be turned on by the power of the battery. 8. The lighting control circuit has charging switching means between the bicycle dynamo and the secondary battery, and the output voltage of the rectifying means is set by the lighting control circuit. The lighting control for a bicycle according to any one of claims 1 to 6, wherein when the voltage is equal to or higher than the voltage, the charging switching means is activated to charge the secondary battery. apparatus.