JP2628799B2 - Bicycle automatic lighting equipment - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an automatic lighting device for a bicycle provided with a hub dynamo that constantly generates electric power according to the rotation of wheels.

[0002]

2. Description of the Related Art In general, two types of battery lighting and an external power generator are widely used for lighting bicycles. The battery type uses a dry battery or the like as a power source, and turns on and off when a hand switch is switched. In addition, the exterior type power generator generates electricity by the rotation of the roller pressed against the side of the tire of the bicycle,
The contact with the tire is intermittently turned on and off when the power generation device is brought up and down.

[0003] In addition, there is a demand for a lighting device that automatically turns on when the vehicle becomes dark regardless of the occupant's judgment from the viewpoint of traffic safety. There are JP-A-1-87979 and JP-A-2-70585. Japanese Utility Model Laid-Open No. 1-87979 has a daylight switch, a sensor for detecting whether the bicycle is running or stopped, and a lighting control circuit. Light. Japanese Patent Application Laid-Open No. Hei 2-70585 discloses a battery power supply, a daylight switch that detects whether the surroundings are bright or dark and emits a signal, and a seismic sensor that detects whether the bicycle is running or stopped by the vibration of the bicycle. A bicycle battery light which has a main body which accommodates these and is attached to the front of a bicycle cage or a handle, and which is lit only during night driving by the operation of the daylight switch and the seismic sensor.

FIGS. 4 to 9 show a bicycle hub generator (hub dynamo) previously filed by the present applicant (Japanese Patent Application No. 2-56330).
No.). In the figure, reference numeral 1 denotes a front fork which is a part of a bicycle frame, and reference numeral 2 denotes an axle which extends between the ends of the left and right front forks 1 and is fixed by nuts 3.
4 is one end of the hub body of the front wheel (left end in FIG. 4)
A hub having a hollow cylindrical shape with a side cover 5 screwed to the open end of the hub 4 is rotatable on the axle 2 via a ball bearing 6. The open end side of the hub body 4 has a large diameter portion 4a formed by expanding the diameter. Reference numeral 7 denotes wheel spokes attached to the hub body 4 respectively.

This hub dynamo is configured as follows. That is, one end of the hollow cylindrical fixed cylinder 8 (FIG. 4)
4 is fitted to the axle 2 and fixed thereto by a key 9, and the other end of the fixed cylinder 8 (FIG. 4).
The left end is opened, and the diameter of the open end side is expanded to form a large diameter portion 8a, and internal teeth 8b are engraved on the inner periphery thereof. The outer teeth 10 having a slightly smaller pitch diameter than the inner teeth 8b are provided on the outer periphery of the first elastic ring 10 and the second elastic ring 11.
a and 11a are engraved. In the inner circumference of the first elastic ring 10 and the second elastic ring 11, tracks 10b, 11b formed of grooves having a concave cross section are provided over substantially the entire center of the width of the ring.
(See FIG. 5). The outer teeth 10a and 11a are loosely engaged with the inner teeth 8b of the large diameter portion 8a (see FIGS. 8 and 9), and the first elastic ring 10 and the second
An elastic ring 11 is provided side by side with a ring-shaped spacer 12 interposed therebetween. 13 is a corner ring provided at the right corner of the second elastic ring 11 in FIG. 4, and 14 is a retaining ring. 2a is a step provided on the axle 2, 2b is a lead wire take-out groove also serving as a key groove, 15 is a washer, and 16 is a spring.

Further, as shown in detail in FIG.
A wire 17b is wound around the groove of 17a to form a coil 17,
Next, a strip-shaped magnetic pole piece 18a is arranged at each of the positions where the outer periphery of the cylinder is divided into four parts, and these four magnetic pole pieces 18a are arranged.
Are connected to a small-diameter cylindrical portion 18b to form the first armature 18 integrally. The cylindrical portion 18b of the first armature 18 is inserted into the center hole 17c of the coil 17, and The second armature 19 is integrated by connecting the cylindrical portion 19b enclosing the protruding cylindrical portion 18b and the four strip-shaped magnetic pole pieces 19a located at the middle of the four magnetic pole pieces 18a at the time of assembly. And the second armature 19 is connected to the coil 17 described above with the first armature.
As shown in FIG. 6, a power generation coil body 20 is integrally formed by fitting to the combined body with the armature 18. 21 is coil 17
This is the lead wire drawn from Then, as shown in FIG. 4, the power generating coil body 20 configured as described above is fixed to the fixed cylindrical body 8.
The lead wire 21 is taken out through a hole 8c and a key groove 2b provided in the fixed cylinder 8, and is fixed to the outside.

A rotor 22 integrally formed by combining a magnet 22a and a second sun roller 22b is attached to the axle 2 such that the magnet 22a corresponds to each of the pole pieces 18a, 19a of the power generating coil body 20. On the other hand, it is provided rotatable. Also, the first sun roller 23a and the disc-shaped planet carrier 23 are integrally formed,
The planet carrier 23 is rotatably mounted on the axle 2 between the rotor 22 and the side lid 5 of the hub body 4 and includes three planetary carriers arranged on the outer periphery of the first sun roller 23a. The first planetary roller 24 (see FIG. 8) is pivoted on the side lid 5 of the hub 4.
Each is pivotally provided by 25. Further, three second planetary rollers 26 are provided around the outer periphery of the second sun roller 22b.
(See FIG. 9) are provided on the planet carrier 23 by pivots via shafts 27, respectively. And the above-mentioned first elastic ring
The diameter of the inner peripheral surface of 10 is formed slightly smaller than the diameter of the circle in which each first planetary roller 24 is inscribed.
The elastic ring 10 is press-fitted to the outside of each first planetary roller 24, and the first planetary roller 24 is pressed against the first sun roller 23a. Similarly, the second elastic ring 11
Is formed slightly smaller than the diameter of the circle in which each second planetary roller 26 is inscribed, and the second elastic ring 11 having this small inner diameter is pressed into the outside of each second planetary roller 26,
The second planetary roller 26 is pressed against the second sun roller 22b.

A track 24a formed of a rectangular ridge in the circumferential direction protrudes from the outer peripheral surface of the first planetary roller 24, and a track 26a formed of a rectangular ridge in the circumferential direction is also provided on the outer peripheral surface of the second planetary roller 26.
Is protruding. A track 10b consisting of a square groove fitting with the track 24a is provided on the inner peripheral surface of the first elastic ring 10, and a track 23b consisting of a square groove fitting with the track 24a is provided on the outer peripheral surface of the first sun roller 23a. Have been. A track 11b formed of a square groove fitted to the track 26a on the outer peripheral surface of the second planetary roller 26 is provided on the inner circumferential surface of the second elastic ring 11, and a track 22c formed of a square groove fitted to the track 26a is formed on the second track. 2 is provided on the outer peripheral surface of the sun roller 22b.

When the bicycle having the hub dynamo configured as described above travels, the hub 4 integrally formed with the wheels rotates together with the side cover 5 and the shaft 25 in the direction of arrow A in FIG. In this case, since the fixed cylindrical body 8 is fixed, when the first planetary rollers 24 revolve in the direction of the arrow A via the shaft 25, each of the first planetary rollers 24 rotates in the direction of the arrow B accordingly. . The first sun roller 23a, which comes into contact with the first planetary roller 24 and rolls, by the revolution of the first planetary roller 24 in the direction of arrow A and the rotation of the first planetary roller 24 in the direction of arrow B.
Rotates at an increased speed in the direction of arrow C in FIG. In this case, the inner diameter of the first elastic ring 10 of the fixed cylinder 8 is 64 mm,
Assuming that the outer diameter of the first sun roller 23a is 16 mm, the rotation of the planet carrier 23 integrated with the first sun roller 23a is (64+
16) Since ÷ 16 = 5, the speed is increased to 5 times the rotation of the hub body 4.

When the planet carrier 23 integral with the first sun roller 23a rotates in the direction of arrow C, the shaft 27 also rotates in the direction of arrow C as shown in FIG. It revolves in the direction of arrow C and rotates in the direction of arrow D. Accordingly, the second sun roller 22b which rolls in contact with this rotates at an increased speed in the direction of arrow E. In this case, assuming that the inner diameter of the second elastic ring 11 of the fixed cylinder 8 is 64 mm and the outer diameter of the second sun roller 22b is 16 mm, the second
The rotation of the rotor 22 integral with the sun roller 22b is (64 + 1
6) Since ÷ 16 = 5, the rotation speed is five times that of the planet carrier 23. That is, the first and second stages of planetary roller arrays can provide a rotational peripheral speed substantially equal to that of the (5 × 5) = 25-times exterior type.

That is, according to the hub dynamo, the magnet is not strengthened and the number of turns of the power generation coil is not increased.
An electromotive force equivalent to that of the external power generation device can be generated. Therefore, it is possible to use a magnet and a power generation coil of the same size as those of the external power generation device without the need for special parts such as the conventional power generation device with a built-in hub. The diameter can be very small. Further, the number of poles for one rotation of the wheel is substantially equal to that of the exterior type, so that smooth rotation with almost no pulsation can be obtained. Therefore, it can be said that this hub dynamo is a small-sized power generator with a built-in hub that has the same power generation performance as a conventional external power generator and is also efficient and has a good appearance.

[0012]

The battery type of the above-mentioned conventional bicycle lighting device uses a dry battery or the like as a power source and turns on and off by switching a hand switch. Although no load is placed on the leg strength of the occupant, the battery is exhausted, which is uneconomical, and has the problem that it takes time to replace the battery. In addition, the external power generation device generates power by the rotation of the roller pressed against the side of the tire of the bicycle, and turns on and off the light by intermittently contacting the tire when the power generation device falls. However, there is a problem that the load on the occupant's leg is burdened and the lighting operation is troublesome.

In any of the above-described battery-powered and external power-generating devices, whether or not to turn on the illumination when it becomes dark depends on the occupant's judgment. The idea of economics works, and the generator has a heavy pedal, and it is troublesome to turn the generator up and down. There were many people running. Bicycle lighting not only illuminates the road ahead at night to help the occupants drive safely, but also plays an important role in informing other pedestrians and car drivers of the presence of the bicycle. So, from the aspect of traffic safety,
There has been a strong demand for a lighting device that automatically turns on when it becomes dark, regardless of the occupant's judgment.

The devices disclosed in Japanese Utility Model Laid-Open No. Hei 1-87979 and Japanese Patent Laid-Open No. Hei 2-70585, which have been developed for automatic lighting,
If the power switch is turned on before driving at night, the lamp is automatically turned off in a bright place such as a shopping street, and automatically turned off after a fixed time after stopping when temporarily stopping like a traffic light Although the battery can be used economically and efficiently, the power source for the lighting according to this prior art is a battery, so even if the consumption of the battery is somewhat suppressed, it is still uneconomical, Exchange is also necessary. Further, in order to detect whether the bicycle is running or stopped, it is necessary to provide a sensor for detecting rotation of wheels or a seismic sensor for detecting vibration. Furthermore, since switching of the power switch is left to the discretion of the occupant, there is a problem that it is conceivable that the power is not turned on at night as in the related art.

[0015]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention provides a power generating coil body disposed inside a hub body rotatably supported on an axle and fixed to the axle, and a hub body. A rotor that rotates together with the rotor, and a speed increasing means for connecting the hub and the rotor, and rotating the rotor at a higher speed than the hub, and comprising a generator that constantly generates power according to the rotation of the hub. A circuit for connecting a hub dynamo and a battery power supply in parallel, and connecting the battery power supply and a sensor for detecting brightness in parallel via a resistor, and detecting rotation of a wheel by an output from the hub dynamo. Equipped with a circuit that controls the turning on and off by a signal from the sensor that detects the brightness, and is turned on by the hub dynamo at the time of driving required, after stopping at the time of driving required,
And an automatic lighting device for a bicycle, which is illuminated for a predetermined time by the battery power supply when the bicycle is slightly moved.

Further, in the present invention, a power generating coil body disposed inside a hub body rotatably supported by an axle and fixed to the axle, a rotor rotating together with the hub body, a hub body and a rotor And a speed increasing means for rotating the rotor at a speed higher than that of the hub body, and a hub dynamo comprising a generator that constantly generates power according to the rotation of the hub body;
A capacitor is connected in parallel, and a capacitor and a sensor for detecting brightness are connected in parallel via a resistor, and a circuit for detecting rotation of a wheel based on an output from the hub dynamo, and the brightness is detected. A circuit for controlling turning on and off by a signal from a sensor to be turned on, while turning on by the hub dynamo at the time of driving required,
The condenser may be turned on for a certain period of time by the condenser after stopping during driving required lighting and at the time of fine movement of the bicycle.

[0017]

As described above, according to the present invention, a required driving force is small, and a hub dynamo that constantly generates power according to the rotation of the hub body is used as a power supply, and based on the action of an optical sensor that detects whether the surroundings are bright or dark. The lighting can be turned on automatically when it gets dark. In addition, when the bicycle is temporarily stopped or slightly moved by using the output of the hub dynamo as a signal source together with a battery power source, the lighting device can be turned on for a certain period of time by the battery power source or the condenser.
Further, in the present invention, the determination as to whether to turn on the lighting device during bicycle running is not made by the occupant, but by the action of the optical sensor. Therefore, it is possible to notify other passengers, car drivers, and the like of the existence of the bicycle, as well as the safety of the bicycle.

Further, in this case, the main power source of the lighting is a dynamo, and the power consumption of the battery is extremely small.
It is economical and requires very little battery replacement. Further, in the present invention, since the output of the hub dynamo is used as a signal for detecting the rotation of the wheel, a sensor for detecting the rotation of the wheel for detecting whether the bicycle is running or stopped, and a vibration sensor for detecting the vibration. Since there is no need to provide a container, the number of components is very small, and assembly is simplified. In addition, since a hand switch is not required, the wiring can be shortened, and the bulb does not become dark due to a voltage drop due to the wiring.

[0019]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to FIGS. Drawing, Dy hub dynamo, D ₂ are diodes, C ₁ -C ₃ denotes a condenser, CdS (cadmium sulfide photoconductor) is an optical sensor, R ₁ to R ₁₀ is the resistance, Ry relay, G ₂ ~G ₅ Is the NAND gate circuit of the C-MOS IC, Q ₁
~Q ₆ is transistor, L is a lamp.

FIGS. 1 and 2 show the first invention.
This is a hub dynamo Dy in which a generator is built in a bicycle hub 4 (see FIG. 4) and an optical sensor C for detecting brightness.
dS and a circuit for controlling turning on and off by the sensor CdS, and the hub dynamo Dy turns on when the vehicle needs to be turned on. FIG. 1 and FIG.
Shows the embodiment of the circuit of the invention, in this case, the circuit comprising in combination a hub dynamo Dy and the battery power supply B ₁ or B _2, detects the rotation of the wheel by the output from the hub dynamo Dy, the brightness comprising a circuit for controlling the point off by a signal from the optical sensor CdS for detecting the of, with lights by the hub dynamo Dy when main lighting running, after stopping the main lighting traveling, and the bicycle at the time of the fine movement of the battery power supply B ₁ or so as to light up a certain time by B ₂ is obtained by constituting the automatic lighting lighting device of the bicycle.

The optical sensor CdS 1 is connected to a resistor R ₃ in series, are connected in parallel with the battery B _1. FIG.
Bicycles are those showing a circuit for charging from constantly hub dynamo Dy using secondary battery B ₂ in place of the primary battery B _1, using a condenser C ₃ in place of 3 1 battery B ₁ And the circuit of the lamp L can be opened and closed only a few times based on the stop operation and the fine movement operation.

Next, the operation of the apparatus configured as described above will be described. Since daytime received light amount is large, the resistance value of the light sensor CdS is low, the resistance R ₃ and the light sensor CdS coupling point a voltage gate circuit G _3, and becomes lower than the threshold voltage of the gate circuit G _5, result gate Circuit G ₃ , gate circuit G ₅
Goes high. Therefore transistor Q ₂ is not conducting, no current flows through the relay coil Ry. The transistor Q ₄ also not conduct even transistors Q _5, Q ₆ do not conduct, a current does not flow in the resulting lamp L.

[0023] When at night, the resistance value of the light sensor CdS increases, the resistance R ₃ and the light sensor CdS coupling point a voltage gate circuit G _3, and is higher than the threshold voltage of the gate circuit G _5. If this time the bicycle is traveling, the transistor Q ₁ is turned by the output of the hub dynamo Dy. Voltage of for binding point b is the output of the gate circuit G ₂ becomes lower than the threshold voltage of the gate circuit G ₂ becomes high. The output for the gate circuit G ₃ are both inputs high becomes low. Thus the transistor Q ₂ is turned on, the relay contact a current flows through the relay coil Ry is switched as indicated by a dotted line in FIG. 1, the lamp L is turned on current flows from the hub dynamo Dy to the lamp L.

[0024] If the bicycle is stopped, the output of the hub dynamo Dy becomes low, Toraji star Q ₁ is do not conduct,
Voltage coupling point b becomes high, the output of the gate circuit G ₂ is made low. Thus, the input to the gate circuit G ₃ are made low and high, the output therefrom becomes high. Therefore transistor Q ₂ is not conductive, relay contacts for the relay coil Ry current does not flow back to the original state indicated by the solid line in FIG. 1. Meanwhile, during the previous stopping of the bicycle travel, and conducts transistor Q _3, the voltage of the coupling point c becomes low,
Since lower than the threshold voltage of the gate circuit G _4,
The output of the gate circuit G ₄ are made high, the gate circuit G ₅ are output for both input is high becomes low, the capacitor C ₂ is charged from a result transistor Q ₄ is turned on. Thus, even after the stop of the bicycle, the transistor Q ₅ is turned on by the charging current, transistor
Q ₆ is also conducting, the lamp L is lit only during the time until the capacitor C ₂ will be discharged (e.g., 30 seconds).

When the bicycle is slightly moved after the stop, an output of several pulses is obtained from the hub dynamo Dy.
Although the capacitor C ₁ is charged through the resistor R ₁ by the pulse is insufficient to conduct the transistor Q _1. On the other hand, the transistor Q ₃ are for condenser base is not connected to conductive by the pulse. That is, no current flows through the relay coil Ry becomes same operation as in the case of the stopping of the bicycle, the contacts will remain battery B ₁ side. The capacitor C ₂ is connected to the transistor Q ₄
Is charged because it conducts in a pulsed manner. Therefore, the lamp L is turned on for a certain period of time as in the case of the stop.

[0026]

As described above, according to the present invention, a hub dynamo Dy having a small required driving force as shown in FIGS. 4 to 9 is used as a power supply, and the light is darkened by an optical sensor CdS for detecting whether the surroundings are bright or dark. Then, the illumination lamp L can be turned on automatically. Further, when the bicycle stops once or moves slightly, the illumination lamp L can be turned on for a certain period of time by a battery power supply or a condenser based on the output from the hub dynamo Dy. Further, in this case, the determination as to whether to turn on the illumination lamp L while the bicycle is running is not made by the occupant, but by the action of the optical sensor CdS.
It turns on automatically when it gets dark under the constant power generation action of.
Therefore, according to the present invention, it is possible to inform other pedestrians, car drivers, and the like of the existence of the bicycle, as well as the safety of the traveling of the bicycle, thereby greatly contributing to the safety of traffic.

In addition, here, since the main power supply of the lighting is the hub dynamo Dy, the power consumption of the battery is extremely small, so that it is economical and the frequency of battery replacement may be extremely low. Further, the output from the hub dynamo Dy is used as a wheel rotation detection signal, so that a special sensor for detecting the rotation of the wheel for detecting whether the bicycle is running or stopped, or a special sensor for detecting the rotation of the bicycle. Since there is no need to provide a seismic sensor, the number of components is very small, and assembly is easy. In addition, since a hand switch is not required, the wiring can be shortened, and the bulb does not become dark due to a voltage drop due to the wiring. As described above, according to the present invention, there is provided an automatic lighting apparatus for a bicycle which is economical with no battery consumption, simple in configuration, inexpensive, does not require any trouble to turn on and off lights, and greatly contributes to traffic safety. The excellent effect that can be obtained.

In addition, according to the present invention, since the hub dynamo is provided with speed increasing means for rotating the rotor at a speed higher than that of the hub body, the magnet and the power generator having the same dimensions as those of the conventionally known external power generator are provided. Using a coil, it is possible to generate an electromotive force equivalent to that of its exterior type, so that specially-designed parts are unnecessary, the hub outer diameter can be sufficiently reduced, and the power generation frequency can be increased. Thus, flickering of the lamp and voltage fluctuation of the control circuit can be effectively prevented.

Further, since the hub dynamo here is completely housed in the hub body, the hub dynamo itself does not directly receive external force, and in addition to its small size, Even if external force acts on wheels, forks, wheel spokes, etc., it can prevent displacement, deformation, etc. from occurring in the mechanism part, and furthermore, penetration of rainwater, muddy water, dust, etc. Dynamo can be effectively protected.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing an embodiment of the first invention of the present invention.

FIG. 2 is a partial circuit showing another embodiment of the first invention.

FIG. 3 is a partial circuit diagram showing an embodiment of the second invention.

FIG. 4 is a sectional view showing an example of a hub dynamo.

FIG. 5 is an enlarged view of the main part.

FIG. 6 is a perspective view of a power generation coil body.

FIG. 7 is an exploded perspective view of a power generation coil body.

FIG. 8 is a diagram illustrating the operation of the first-stage planetary roller row.

FIG. 9 is a diagram illustrating the operation of a second-stage planetary roller row.

[Explanation of symbols]

Dy Hub dynamo D ₁ Rectifier diode D ₂ Diode C _{1 to} C ₃ Condenser CdS Optical sensor R _{1 to} R ₁₀ Resistance Ry Relay G _{1 to} G ₅ C-MOS IC gate circuit Q _{1 to} Q ₆ Transistor L Lamp B ₁ Battery B ₂ Secondary battery

Claims (2)

(57) [Claims] 1. A hub body rotatably supported on an axle.
And a hub, which is arranged on the side and fixed to the axle
Connecting the rotor that rotates with the body, the hub body and the rotor
The rotor at a higher speed than the hub.
Speed means, and constantly generates power according to the rotation of the hub body
A hub dynamo composed of a generator and a battery power source are connected in parallel, and the battery power source and a sensor for detecting brightness are connected in parallel via a resistor, so that the hub dynamo is connected to the hub dynamo.
A circuit for detecting the rotation of the wheel by the output from the, and a circuit for controlling the turning on and off by a signal from the sensor for detecting the brightness, while being lit by the hub dynamo at the time of driving required, at the time of driving required After stopping,
And an automatic lighting device for a bicycle, wherein the device is illuminated for a predetermined time by the battery power supply when the bicycle is slightly moved. 2. A hub body rotatably supported on an axle.
And a hub, which is arranged on the side and fixed to the axle
Connecting the rotor that rotates with the body, the hub body and the rotor
The rotor at a higher speed than the hub.
Speed means, and constantly generates power according to the rotation of the hub body
A hub dynamo composed of a generator and a condenser are connected in parallel and provided.A sensor for detecting the brightness of the condenser is connected in parallel with a resistor, and the rotation of the wheel is detected by an output from the hub dynamo. Circuit, and a circuit for controlling turning on and off by a signal from the sensor for detecting the brightness, and while being turned on by the hub dynamo at the time of driving required, after stopping at the time of driving required, and at the time of fine movement of the bicycle, the condenser An automatic lighting device for a bicycle, wherein the lighting device is turned on for a certain period of time.