JPH05162673A - Buzzer for bicycle - Google Patents

Abstract

PURPOSE:To generate electronic sound without requiring battery change by driving a piezoelectric buzzer through a free running multivibrator, with a hub generator provided at an axle part as a power source. CONSTITUTION:A bicycle buzzer is formed in such a way that a piezo-electric buzzer 21 is driven through a free running multivibrator 19, with a hub generator D provided at the axle part of a bicycle as power source so as to generate electronic sound. The piezoelectric buzzer 21 is provided in the upper end part of a handle post 5. This is performed utilizing a hole 5a for a pull-up bar 22 provided at the upper part of the handle post 5. A lead wire 23 connected to the power source, the piezoelectric buzzer 21 integrated with a substrate, and each part of a pressing switch 24 are pressed successively into the hole 5a, and press-fixed by a protruding part 24a provided on the pressing switch 24.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a bicycle buzzer powered by a hub generator provided on the axle of a bicycle.

[0002]

2. Description of the Related Art Conventional bicycles with a buzzer include sports cars for boys and bicycles for infants having a buzzer powered by a dry battery.

[0003]

The above-mentioned conventional dry battery type buzzer requires a space for accommodating the buzzer body and the dry battery, so that an extra space must be provided on the bicycle and the weight also increases accordingly. Will be done. If the dry battery is exhausted, the buzzer will not sound,
It is necessary to replace the dry battery, but this dry battery is also troublesome and uneconomical, and if liquid leaks from the dry battery, the corrosion of the liquid may damage the electric circuit. There were problems such as.

[0004]

In order to solve the above problems, in the present invention, a hub generator provided on the axle of a bicycle is used as a power source, and a piezoelectric buzzer is driven through an unstable multivibrator to produce an electronic signal. The bicycle buzzer is configured to generate sound.

The above-mentioned piezoelectric buzzer may be provided in the upper end of the handle post, in the outer end of the handle grip, or in the lamp case.

[0006]

As described above, in the present invention, since the hub generator having a light driving force is used as the power source, the buzzer can be used at any time while the bicycle is running. Since this buzzer does not require a power source such as a dry battery, which is conventionally required, it is not necessary to provide an extra storage space for the battery. Therefore, the bicycle can be made compact by that much, and it is not necessary to replace the battery, so that an economical effect can be obtained.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. In the figure, 1 (see FIG. 2) is a front wheel of a bicycle, 2 is a rear wheel, 3
Is a bicycle frame head pipe, 4 is a front fork, 5 is a handle post, 6 is a handle bar, 7 is a handle grip, 8 is a mudguard for the front wheels, 9 is a headlamp, and 10 is its lamp case.

FIG. 6 shows an example of a hub generator (Japanese Patent Application No. 3-232433) used as a power source in the present invention, which is a hub body of wheels with respect to an axle 11 fixed to a frame of a bicycle. 12 is rotatably fitted, a hollow cylindrical fixed cylinder 13 is provided inside the hub body 12 so as to be fixed to the axle 11, and a power generation coil body 14 is fixedly provided inside the fixed cylinder 13. At the same time, a rotor 16 integrally formed with the magnet 15 is rotatably provided on the axle 11, and has a planetary transmission A for speeding up the rotation of the hub body 12 and transmitting it to the rotor 16. It is a device.

FIG. 1 shows an example of a circuit block diagram of the device of the present invention. D is a hub generator provided in the hub body 12 of the front wheel 1, 17 is a switch, 18 is a rectifying circuit, and 19 is an unstable multi-circuit. A vibrator, 20 is an amplifier circuit, and 21 is a piezoelectric buzzer.

That is, according to the present invention, the hub generator D provided on the axle of the bicycle is used as a power source, and the piezoelectric buzzer 21 is driven through the non-stable multivibrator 19 to generate an electronic sound. Make up.

FIG. 3 shows the piezoelectric buzzer 21 and the handle post 5.
FIG. 3 shows an embodiment provided in the upper end portion of the handle bar 5, which has a hole 5 for the pulling rod 22 provided on the upper portion of the handle post 5.
Using a, the lead wire 23 connected to the power supply, the piezoelectric buzzer 21 integrated with the substrate, and the parts of the pressure switch 24 are formed in the hole 5a.
It is pushed into the inside one by one, and the protrusion 24 provided on this push switch 24
It is adapted to be press-fitted and fixed by a.

FIG. 4 shows an embodiment in which the piezoelectric buzzer 21 is provided inside the outer end portion of the handle grip 7, which is
Lead wire 23 connected to the power supply using the handle bar 6
And the piezoelectric buzzer 21 integrated with the substrate, handle grip 7
It is inserted into the hole 7a at the outer end of the above, and the cap 25 having the pressing switch 25a and the sound extraction hole 25b integrally provided therein is screwed into the screw hole 7b provided in the hole 7a. Further, in this case, the pressing switch 26 may be installed so as to be exposed on the surface of the inner end portion of the handle grip 7.

FIG. 5 shows an embodiment in which the piezoelectric buzzer 21 is provided in the lamp case 10 of the headlamp 9, 21a is a substrate of the piezoelectric buzzer 21, and 10a is a sound removing member provided on the side surface of the case 10. It is a hole. In this case, the push switch (not shown) is preferably installed near the handle.

Next, the operation of the device of the present invention constructed as described above will be described. The hub generator D can be used as a power source whenever the bicycle is running. Therefore, when the switch 17 (see FIG. 1) is closed, the output of the hub generator D is converted from AC to DC by the rectifier circuit 18, and the rectangular wave generated by the unstable multivibrator 19 is amplified by the amplifier circuit 20, whereby The piezoelectric buzzer 21 is driven to issue an alarm. When the switch 17 is opened, no current flows from the hub generator D to the piezoelectric buzzer 21, but the piezoelectric buzzer 21 keeps sounding for a few seconds and then stops due to the current charged in the capacitor in the rectifier circuit 18. .. Therefore, the buzzer as a horn while cycling is enough to give a warning by sounding for a few seconds (about 10 seconds), so that the switch opening / closing operation can be performed in a short time. From this, it is not necessary to move the switch installation position from the handle grip 7 to the handle post 5, that is, to continue pushing with a finger, so that the safety of bicycle riding is not impaired.

[0015]

As described above, in the present invention, since the hub generator having a light driving force is used as the power source, the buzzer can be used at any time while the bicycle is running. Since this buzzer does not require a power source such as a dry battery, which is conventionally required, it is not necessary to provide an extra storage space for the battery. Therefore, according to the present invention, it is possible to obtain an advantage that the bicycle is compact and the battery is not required to be replaced, which is economically advantageous.

[Brief description of drawings]

FIG. 1 is a circuit block diagram of a device of the present invention.

FIG. 2 is a side view of a bicycle equipped with the device of the present invention.

FIG. 3 is a partial perspective view showing a state where a piezoelectric buzzer is attached to a handle post portion.

FIG. 4 is a partial perspective view showing a state where a piezoelectric buzzer is attached to a handle grip portion.

FIG. 5 is a partially cutaway perspective view showing a state where a piezoelectric buzzer is mounted in the headlamp.

FIG. 6 is a sectional view showing an example of a bicycle hub generator used as a power source in the present invention.

[Explanation of symbols]

 1 Front Wheel 2 Rear Wheel 3 Head Pipe 4 Front Hawk 5 Handle Post 6 Handle Bar 7 Handle Grip 8 Mudguard 9 Headlamp 10 Lamp Case 11 Axle 12 Hub Body 13 Fixed Cylindrical Body 14 Generator Coil Body 15 Magnet 16 Rotor A Planetary Gearbox D Hub generator 17 Switch 18 Rectifier circuit 19 Astable multivibrator 20 Amplification circuit 21 Piezoelectric buzzer 22 Lifting rod 23 Lead wire 24 Push switch 25 Cap 25a Push switch 26 Push switch

Claims (4)

[Claims] 1. A bicycle buzzer, characterized in that a hub generator provided on an axle of a bicycle is used as a power source and a piezoelectric buzzer is driven via an unstable multivibrator to generate electronic sound. 2. A bicycle buzzer, wherein the piezoelectric buzzer according to claim 1 is provided in an upper end portion of a handle post. 3. A bicycle buzzer, wherein the piezoelectric buzzer according to claim 1 is provided in an outer end portion of a handle grip. 4. A bicycle buzzer, wherein the piezoelectric buzzer according to claim 1 is provided in a lamp case.