JPH11165671A - Burglar alarm device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a burglar alarm with simple key switch configuration by further-improving a previously applied alarm device which has little fear of breakage being caused by a tamperer, can operate completely even if the key switch of an alarm device or its wire is broken, and which needs no replacement of batteries. SOLUTION: This burglar alarm device, which stores a generator and a buzzer driven by the generator during traveling in the wheel hub of a bicycle or the like and closes a buzzer drive circuit when a key switch circuit is opened with a key 50 taken off, is also provided with a reed switch 41 where a key switch is embedded in the key switch part 4K of a lamp 4, and a magnetizing part 52 formed at the key 50.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an alarm device for preventing theft provided on a bicycle having a hub dynamo.

[0002]

2. Description of the Related Art Hitherto, various types of alarm devices for preventing theft of bicycles have been proposed, for example, Japanese Patent Application Laid-Open Nos. 8-319750 and 8-301.
No. 158 discloses such a device. In the former disclosed in JP-A-8-319750, a buzzer mechanism including a battery, a buzzer drive circuit, a vibration sensor, and the like is housed in a case integrally with a locking mechanism, and the buzzer drive circuit includes: It is connected to a power switch that closes an alarm circuit by contact with a bar member at a locked position. The latter disclosed in Japanese Patent Application Laid-Open No. 8-301158 is to make an alarm sound by an output of an oscillation circuit supplied with power from a hub dynamo, and a circuit is provided between the hub dynamo and the alarm. A switch for opening and closing is provided.

[0003]

However, in such a conventional burglar alarm device, the former Japanese Patent Application Laid-Open No. 8-319 has been disclosed.
In the example of Japanese Patent Publication No. 750, since a vibration sensor is used, when a bicycle is parked on a road with a large traffic volume, there is a possibility that the alarm buzzer mechanism may be activated by the vibration of a heavy vehicle, etc. Is housed in the case integrally with the locking device, so that the inexperienced person can easily see the buzzer mechanism together with the locking device.
Also, the battery that drives the buzzer had to be replaced from time to time. Further, in the latter Japanese Patent Application Laid-Open No. 8-301158, since a sensor for detecting theft is not provided, it is not possible to discriminate between a legitimate user and an ignorant person, and a warning may be issued due to the carelessness of the owner. In addition, if the wiring between the key switch and the alarm is cut, the alarm may not operate.

Accordingly, the applicant of the present application has developed an alarm device which is less likely to be broken by an inexperienced person, operates reliably even if the key switch of the alarm device is broken or the wiring is cut, and does not require battery replacement. It was previously proposed as Japanese Patent Application No. Hei 9-186399. It is an object of the present invention to provide a burglar alarm device in which the configuration of a key switch is simplified by further improving the alarm device according to the above-mentioned application.

[0005]

SUMMARY OF THE INVENTION Accordingly, the present invention provides a burglar alarm device in which a generator and a buzzer driven by the generator during running are stored in a wheel hub of a bicycle or the like. A burglar alarm device for closing a buzzer drive circuit when a key switch circuit is opened, wherein the key switch is constituted by a reed switch embedded in a key switch portion such as a lamp and a magnetized portion provided on the key. Things. Further, the present invention is characterized in that the locking bar is configured to lock the wheel by operating a key switch on the lamp or the like, and these are used as means for solving the problem.

[0006]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1, 2 and 4 to 9 show a first embodiment of the present invention, and FIG. 1 is a diagram showing an overall side view of a bicycle provided with a burglar alarm device of the present invention and a lamp and keys. FIG. 2 is an enlarged explanatory view of a key and a key switch unit. 4 to 6 are diagrams showing an alarm device.
7 to 9 are explanatory diagrams of the alarm circuit. As shown in FIG. 1 (A), a hub dynamo 1 is installed on a wheel hub of the front wheel 2, and the hub dynamo 1 includes a generator described later and a secondary battery which is charged by the generator at the time of traveling. A burglar alarm device that houses a buzzer driven by a secondary battery is configured. The burglar alarm device is configured to remove a key from a key hole 5 of a key switch portion 4K of a lamp 4 attached to a front wheel fork 3. When the switch circuit is opened, the buzzer drive circuit using the secondary battery is closed.

As shown in FIGS. 1B and 1C, the key 50
Consists of a grip portion 53 and an insertion portion 51 having a magnetized portion 52. The key 50 is inserted into the key hole 5 of the key switch portion 4K provided on the side surface of the lamp 4 so as to be inserted into the key switch portion 4K. The key switch formed by the embedded reed switch 41 is configured to be closed. That is, the key switch circuit is opened by extracting the key from the key hole 5.

FIG. 2 shows a modification of a combination of a key hole 5 of a key switch portion 4K provided on a side surface of the lamp 4 and a key 50 inserted into the key hole 5. 2A is unique to the owner's bicycle, and the example of the combination shown in FIGS. 2A and 2B is a key hole 5 having a semi-circular cross section.
And an insertion portion 51 for the key 50. In addition, as shown in FIG. 2C, a ring-shaped cross-section, a cross-shaped cross-section, a triangular cross-section, and the like are exemplified. In addition, it goes without saying that the key hole 5 and the insertion portion 51 may be provided with concavities and convexities at corresponding positions so that the key 50 can be inserted into the key hole 5 only in a proper combination thereof. No.

FIG. 4 is a cross-sectional view of the hub dynamo 1 supported at the lower end of the front wheel fork 3. The special nuts 11 and 12 screwed to the hub shaft 13 are connected to the hub via bearings 9 and 10. The drum 6 and the left and right side panels 7, 8 are pivotally supported. Reference numerals 14 and 15 indicate lock nuts. A magnet 16 is installed inside the rotating drum 6, and a hub shaft 1 as a fixed shaft
A stator 17 fixed to the magnet 3 is provided, and an electromotive force is generated by non-contact relative movement between the magnet 16 and the stator 17. The power generated here is supplied to the circuit board 19 via the lead wire 18 and the connector 2
0 is also supplied to the lamp 4.

The circuit board 19 includes one special nut 1
The circuit board 19 is installed in the circuit cases 21 and 22 mounted via the spacers 24 via a spacer 24, and a buzzer assembly 25 is installed on the circuit board 19 as described later. Reference numeral 23 denotes a drain hole formed in the lower part of the circuit case 21;
Denotes a rubber seal for fixing the buzzer assembly 25 to the circuit case 21.

FIG. 5 is a side view of the hub dynamo 1.
FIG. 5B shows a state in which a circuit case 22 serving as a lid is mounted. FIG. 5A shows the state in which the circuit case 22 is removed.
In addition, this shows a state in which a part of the circuit board 19 is cut away. As shown in FIG. 5 (A), on the circuit board 19, besides the buzzer assembly 25, the electric power 2 constituting the secondary battery for storing power for the oscillation LSI 27 and the sub lamps for alarm and afterglow. A multilayer capacitor 28 is provided. FIG. 6 is a cross-sectional and front view of a buzzer case having a piezoelectric buzzer. The buzzer case is provided in the buzzer assembly 25 shown in FIGS.
A piezoelectric element 31 is provided therebetween.

FIG. 7 is a control circuit block diagram of an embodiment of the burglar alarm device according to the present invention. The current generated by the hub dynamo (generator) 32 decreases daytime and nighttime to reduce the predetermined illuminance. Is supplied to a main lamp 34 via a switch 33 which is closed by an illuminance detection circuit 39 for detecting the buzzer, and is also supplied to a booster circuit 35 provided for boosting the buzzer to increase the applied voltage. You. The voltage boosted by the booster circuit 35 is supplied to a power supply circuit 38 for a buzzer control circuit 37 via a constant voltage circuit 36 and to a capacitor serving as a power supply for the illuminance detection circuit 39 (not shown).
By being charged by the constant voltage circuit 36, the capacitor of the power supply circuit 38 and the capacitor for the sub-lamp at the time of temporary stop are prevented from being charged exceeding their ratings.

The voltage boosted by the booster circuit 35 is
The speed is also supplied to the bicycle speed detection circuit 40, which detects the speed of the bicycle according to the boosted voltage and sends the speed information to the buzzer control circuit 37. The buzzer control circuit is also supplied with a signal from the above-described reed switch 41 which is an external switch. By removing the key 50 from the key hole 5 of the key switch unit 4K provided on the lamp 4 (the locked state of the key switch, that is, the anti-theft state), the key switch circuit of the reed switch 41 is opened, and the speed detection circuit 40 If the speed of the bicycle detected by is more than a predetermined value,
The buzzer circuit 37 closes the switch circuit 42 and drives the buzzer output circuit 43 with the electric power charged in a buzzer output circuit capacitor (not shown).

On the other hand, the illuminance information detected by the illuminance detection circuit 39 and the speed information detected by the speed detection circuit 40 are supplied to a sub-lamp control circuit 44, and the illuminance of the surroundings becomes a predetermined value or less at dusk or the like. When the speed of the bicycle becomes lower than a predetermined value, the sub-lamp control circuit 44 closes the switch circuit 45 to supply the power from the power supply circuit 38 to the sub-lamp 4.
6 to turn on the sub lamp 46 to compensate for the lack of power supply to the main lamp 4 by the hub dynamo 1. In this embodiment, the buzzer driving means is constituted by the buzzer control circuit 37 and the switch 42, and the traveling detecting means is constituted by the boosting circuit 35 and the speed detecting circuit 40.

FIG. 8 shows the generator 32 and the booster circuit 3 of FIG.
5, speed detection circuit 40, constant voltage circuit 36, illuminance detection circuit 39, main lamp 34, power supply circuit 38, buzzer control circuit 37, key switch 41, buzzer output circuit 4
3 is a control circuit diagram showing a sub lamp control circuit 44 and a sub lamp 46. FIG. As shown in FIG.
Is a capacitor C1 and C2 connected in series, and a diode D1 having a cathode connected to the capacitor C1.
And a diode D2 having an anode connected to the capacitor C2. Therefore, the booster circuit 35 is constituted by a voltage doubler rectifier circuit. The speed detection circuit 40 includes resistors R1 and R2 connected in series, and a capacitor C3 connected in parallel to the resistor R2. The constant voltage circuit 36 includes an NPN transistor Tr1, a resistor R3 connected between the base and collector of the NPN transistor Tr1, and a resistor R3.
And a Zener diode ZD1 having a cathode connected to one end of the NPN transistor Tr1 and the base of the NPN transistor Tr1.

The illuminance detection circuit 39 includes resistors R4, R5, R
6 and R7, a day / night detection optical sensor CdS, and a comparator Co. The capacitor C4 provided between the constant voltage circuit 36 and the illuminance detection circuit 39 constitutes a power supply of the illuminance detection circuit 39 as a secondary battery. In the illuminance detection circuit 39, the reference voltage appearing at the connection point S4 between the resistors R4 and R5 is applied to the negative input terminal of the comparator Co, and the voltage appearing at the connection point S3 between the day / night detection optical sensor CdS and the resistor R6 is compared with the comparator Co. To the positive input terminal. The resistor R7 is a resistor for providing hysteresis to the blinking operation of the lamp. The resistor R7 prevents the lamp from being repeatedly turned on and off due to the influence of an oncoming vehicle after the lamp is turned on or turned off at night. Connected between the output terminal and the positive input terminal. In the present embodiment, the blinking switch 33 of the main lamp 34 is configured using a relay. The protection diode D3 connected in parallel with the relay coil L causes a back electromotive force generated by a change in current flowing through the relay coil L. The effect of electric power can be eliminated.

The power supply circuit 38 includes a capacitor C5,
A diode D having a cathode connected to the capacitor C5
4 is provided. The capacitor C5 is connected to the electricity 2 in FIG.
This corresponds to the heavy condenser 28. The buzzer control circuit 37 includes an NPN transistor Tr2 having a base and an emitter connected to the reed switch 41;
Diode ZD2 whose anode is connected to the collector of the transistor Tr2, and NPN whose emitter is connected to the emitter of the NPN transistor Tr2 and whose collector is connected to the cathode of the Zener diode ZD2.
Transistor Tr3 and the NPN transistor T
a resistor R8 connected to the base of R2, a resistor R9 connected to the base of the NPN transistor Tr3, and one end connected to one end of the resistor R9 and the NPN transistor T
a resistor R10 connected to the base of R3 and having the other end connected to the emitter of the NPN transistor Tr2 and the emitter of the NPN transistor Tr3;
10 and a capacitor C6 connected in parallel.

The switch circuit 42 includes a PNP transistor Tr4 and a resistor R11 connected to the base of the PNP transistor Tr4. Buzzer output circuit 43
Comprises an oscillator Os, an NPN transistor Tr5 having a base connected to a signal output portion of the oscillator Os,
A buzzer Bz connected between the collector of the type transistor Tr5 and a reference voltage section of the oscillator Os. In the present embodiment, a piezoelectric buzzer is employed as the buzzer Bz. The capacitor C7 forms a power supply for the buzzer output circuit 43. The buzzer Bz corresponds to the piezoelectric element 31 shown in FIG.

The sub-lamp control circuit 44 includes an NPN transistor Tr6, a diode D5 having a cathode connected to the base of the NPN transistor Tr6, a resistor R12 connected to an anode of the diode D5, a cathode of the diode D5, NPN transistor Tr
A diode D6 having a cathode connected to the base 6;
A resistor R13 connected to the anode of the diode D6
A resistor R14 connected between the collector and the emitter of the NPN transistor Tr6, a capacitor C8 connected in parallel to the resistor R14, a Zener diode ZD3 connected in parallel to the capacitor C8, and a collector of the NPN transistor Tr6. , And a diode D7 whose cathode is connected to the resistor R15. The switch circuit 45 includes an NPN transistor Tr7
And a resistor R16 connected to the base of the NPN transistor Tr7.

Hereinafter, the operation of the control circuit according to this embodiment will be described. FIG. 9 is a signal waveform diagram for explaining the operation of the burglar alarm device of the present invention. In FIG. 9, Speed
Indicates a temporal change in the running speed of the bicycle detected by the speed detection circuit 40, and S1 indicates the speed detection circuit 4
0 indicates a temporal change of a signal waveform at a point S1 between the buzzer control circuit 37, S2 indicates a temporal change of a signal waveform at a point S2 between the diode 4 and the capacitor C5, and S3 indicates a day / night detection. S4 shows a temporal change of a signal waveform at a point S3 between the optical sensor CdS and the resistor R6.
Represents the temporal change of the signal waveform at the point S4 between the resistors R4 and R5, S5 represents the temporal change of the signal waveform at the output of the comparator Co, and S6 represents the capacitor C8.
Shows the temporal change of the signal waveform at point S6 between the resistor R14 and the Zener diode ZD3, and S7 shows the temporal change of the signal waveform at point S7 between the resistors 9 and 10.

Further, ML indicates a temporal change of ON / OFF of the main lamp 34, and SL indicates ON / OFF of the sub lamp 46.
OFF indicates a temporal change, KS indicates a temporal change in setting and canceling of the key switch 41, and Bz indicates a buzzer Bz.
Shows a temporal change in on / off of the time t0,
t8 is night time, and times t9 to t13 are daytime.

At time t0, when the owner inserts the key 50 into the key hole 5 of the key switch unit 4K of the lamp 4 and closes the reed switch 41 to release the locked state of the key and start running, the generator The electric power generated at 32 is rectified by the booster circuit 35, is then converted to a constant voltage by the constant voltage circuit 36, and charges the capacitor C4 as a secondary battery and also charges the capacitor C5 via the diode D6. At time t1, when the traveling speed of the bicycle reaches a predetermined value by the speed detection circuit 40, the resistance value of the day / night detection optical sensor CdS has a large voltage drop due to the dark surroundings, and the voltage between the connection points S4 and S3. , The connection point S4 is higher and the comparator Co
, The point S5 becomes low level, a current flows through the relay coil L of the switch 33, the switching arm COM is switched to the relay contact NO, and the main lamp 34 is turned on (t1).

At this time, the NPN transistor Tr2
Indicates that the key 50 is inserted into the key hole 5 and the reed switch 4
When 1 is closed, it is not turned on because the base and the emitter are connected, and the buzzer Bz is not driven and sounds even when the bicycle is running.
When the speed detection circuit 40 determines that the running speed of the bicycle has become equal to or less than the predetermined value, that is, determines that the voltage at the point S1 has become equal to or less than the predetermined value Vss, the comparator Co
, The point S5 is at a low level, the NPN transistor Tr6 is turned off. N
The PN transistor Tr7 is turned on because the NPN transistor Tr6 is in the off state. As a result, the voltage at the point S6 becomes equal to or higher than the predetermined value Vsi, and the sub lamp 46 is turned on (t2).

The sub lamp 46 is lit by the electric power charged in the capacitor C5 while the voltage of the capacitor C8, that is, the voltage of the point S6 is higher than a predetermined value Vsi.
Therefore, from t3 when the main lamp 34 is turned off to t4
The lighting is continued for the time Ts until the lighting. At time t5,
After the owner passenger stops the bicycle, key 5
When the key switch is opened by pulling out the key switch 5 from the key hole 5 and the key switch is once locked in the anti-theft mode, the inexperienced person knows that the lamp 4 has the key switch section, and If the lead 4 is broken or the lead (not shown) connecting between the lamp 4 and the hub dynamo 1 having the built-in burglar alarm device is disconnected, the open circuit of the reed switch 41 remains as it is. Therefore, the key switch is broken and the inexperienced person starts running the bicycle (t6). When the speed detection circuit 40 determines that the running speed of the bicycle has reached the predetermined value, the voltage at the point S1 becomes Vsb. (T7), and if the voltage at the point S2 is equal to or higher than the Zener voltage of the Zener diode ZD2, the NPN transistor Tr2 is turned on and the NPN transistor Tr2 is turned on. Transistor Tr4 is turned on, electric power from the generator 32 is charged in the capacitor C6.

When the bicycle stops and power is no longer supplied from the generator 32, even if the NPN transistor Tr2 is turned off, the power stored in the capacitor C6 causes N
The PN transistor Tr3 is turned on, and the ON state of the NPN transistor Tr4 is maintained. At this time, NP
The base voltage of the N-type transistor Tr3, that is, the voltage at the point S7 is equal to the ON voltage V of the NPN-type transistor Tr3.
b, the NPN transistor Tr3 is turned on,
The ON state of the NPN transistor Tr4 is maintained. N
When the PN transistor Tr4 maintains the ON state, that is, while the voltage at the point S7 is equal to or higher than Vb (time t7 to t8), the oscillator Os drives the buzzer Bz via the NPN transistor Tr5 and issues an alarm. .

In the daytime, when the occupant, who is the owner, removes the key 50 from the key hole 5 to open the reed switch 41 and puts the key switch in a locked state, which can be called an anti-theft mode, the inexperienced person can use the key switch. In this case, the bicycle is started by breaking a part or breaking a lead wire (not shown) connecting the lamp 4 and the hub dynamo 1 with a built-in burglar alarm device (t9), and the speed detection circuit 40 As a result, the running speed of the bicycle reaches a predetermined value. That is, the voltage at point S1 reaches Vsb (t1
0), the voltage at point S2 is a Zener diode ZD2
NPN transistor T
r2 is turned on, the NPN transistor Tr4 is turned on, and electric power from the generator 32 is charged in the capacitor C6.

When the bicycle stops and power is no longer supplied from the generator 32, even if the NPN transistor Tr2 is turned off, the power stored in the capacitor C6 causes N
The PN transistor Tr3 is turned on, and the ON state of the NPN transistor Tr4 is maintained. At this time, NP
The base voltage of the N-type transistor Tr3, that is, the voltage at the point S7 is equal to the ON voltage V of the NPN-type transistor Tr3.
b, the NPN transistor Tr3 is turned on,
The ON state of the NPN transistor Tr4 is maintained. N
When the PN transistor Tr4 maintains the ON state, that is, while the voltage at the point S7 is equal to or higher than Vb (time t10 to t11), the oscillator Os drives the buzzer Bz via the NPN transistor Tr5, and issues an alarm. . Since the surroundings are bright in the daytime, the resistance value of the day / night detection sensor CdS is low, and the output side of the comparator Co, that is, the point S5 becomes high level, and the switch 33 is turned on.
No current flows through the relay coil L of the switching arm CO
M remains connected to the relay contact NC, and the main lamp 34 does not turn on.

Since the output side of the comparator Co, that is, the point S5 is at the high level, the NPN transistor Tr6 is turned on. NPN transistor Tr
7 is turned off because the NPN transistor Tr6 is in the on state, and the sub lamp 46 is not turned on. The owner inserts the key 50 into the key hole 5 and
Is closed, the key switch is released from the locked state of the anti-theft mode (t12), and running of the bicycle is started (t1).
3) Also, the NPN transistor Tr2 is not turned on because the base and the emitter are connected because the reed switch 41 which is a key switch is normally closed, and the buzzer does not sound even if the bicycle reaches a predetermined traveling speed. B
z does not ring and issue an alarm.

As described above, according to the present embodiment, since the burglar alarm device is provided inside the hub dynamo, there is no need to replace the battery serving as a power source of the burglar alarm device, and the burglar alarm device can be used by an inexperienced person. In addition to reducing the possibility of breakage, even if the key switch is broken or the wiring is cut, the alarm device operates reliably, and the key switch is composed of a reed switch and can be moved only in the insertion direction Since it is a simple cross section, it is simplified and the opening and closing operation of the switch is smooth. Further, since a vibration sensor or the like is not used unlike the conventional one, there is no danger of causing an error. Further, since the key switch section of the burglar alarm device is provided on the lamp section which is independent of the normal locking device, the risk of the key switch section being broken is reduced.

While the PNP transistor Tr4 maintains the ON state, the oscillator Os is operated and the buzzer Bz is driven to generate an alarm, so that an alarm can be issued for a predetermined time. Further, by using the booster circuit 35, the buzzer control circuit 37, that is, the buzzer Bz can be favorably driven. further,
By using a piezoelectric buzzer as the buzzer Bz, power consumption is small, and this is effective when a generator built in the hub dynamo is used as a power supply.

FIG. 3 shows a second embodiment of the present invention. In this embodiment, a lamp 4 having a key switch section 4K for opening and closing a buzzer drive circuit of a burglar alarm device is provided. The lock bar 61 is configured to lock the wheels by operating a key switch. As shown in FIG. 3, a key switch portion 4K is mounted so as to penetrate the side surface of the lamp 4, a reed switch 41 is embedded in the key switch portion 4K, and a locking bar 61 is provided at the other end. Locking cylinder 6
0 is slidably fixedly inserted. Inserting the insertion portion 51 of the key 50 into the locking cylinder 60, pushing the locking cylinder 60 as shown by the arrow, and rotating and locking the key 50,
The locking bar 61 is inserted between wheel spokes (not shown). Although not shown, the insertion portion 51 of the key 50 is provided with a magnetized portion at a position corresponding to the reed switch 41 embedded in the key switch portion 4K as in the case of FIG. The reed switch 41 is closed by inserting the key 50 into the key switch section 4K, and the locked state of the key, which is also called anti-theft mode, is released.

As described above, the present embodiment makes use of the fact that the alarm device can be reliably operated even if the key switch is broken or the wiring is cut, which is a basic feature of the present invention. It is provided with a locking device that is easy to reach. With the above-described configuration, it is possible to attach a locking device to a lamp or the like, which could not be conventionally installed because of its fear of being destroyed. Moreover, in this embodiment, a simple key switch can be formed by simply forming a magnetized portion and a reed switch on a normal push-in / turn-type locking bar lock. Will also be smooth.

While the embodiments of the present invention have been described above, a portion provided with a key switch (in each embodiment, a lamp is provided with a key switch, Or a frame, a handlebar, a grip, a saddle or a normal locking device), a portion where a burglar alarm device is installed (even if the burglar alarm device is not necessarily provided inside the hub dynamo, the key switch Can form an open circuit between the generator and the buzzer control circuit, and can detect that the bicycle is in a running state by a speed detection circuit.) It goes without saying that the type of the key switch for locking the key can be appropriately selected. Further, the NPN transistor in each control circuit described above may be a PNP transistor, or the PNP transistor may be an NPN transistor. Further, the booster circuit is a voltage doubler rectifier circuit, but may be a triple voltage rectifier circuit. Also,
Although the buzzer is a piezoelectric buzzer, another buzzer such as a coil buzzer may be used. Further, the constant voltage circuit can be constituted by another conventionally known circuit. Further, the sub lamp, its control circuit, and the like can be omitted. Furthermore, in the above-described embodiment, the alarm buzzer is driven by the secondary battery that is charged by the generator during traveling. However, this secondary battery is not necessarily required, and is directly operated by the power of the generator. Alternatively, the buzzer may be configured to be driven.

[0034]

As described above in detail, according to the present invention, the battery serving as the power source of the theft alarm device is provided by providing the theft alarm device in the hub dynamo in association with the hub dynamo. There is no need to replace it, and the possibility of theft alarm device being destroyed by an inexperienced person is reduced, and the buzzer drive circuit with a secondary battery that can be charged by the hub dynamo when the key switch circuit is opened by removing the key is closed The burglar alarm device can reliably operate the alarm device even if the key switch is broken or the wiring is cut. In addition, since the key switch is composed of the reed switch and the magnetized portion of the key, the key configuration may be a simple cross section that can be moved only in the insertion direction, and the key switch is simplified, and the opening and closing operation of the switch becomes smooth. . Further, since a vibration sensor or the like is not used unlike the conventional one, there is no danger of causing an error. Further, since the key switch section of the burglar alarm device is provided on the lamp section which is independent of the normal locking device, the risk of the key switch section being broken is reduced.

Further, in the case where the locking bar is configured to lock the wheel by operating the key switch of the lamp or the like, even if the key switch, which is a basic feature of the present invention, is broken or the wiring is cut, it is ensured. Utilizing the fact that the alarm device can be operated, it has become possible to attach a locking device that is relatively visible to lamps, etc., which could not be installed due to the risk of being destroyed in the past. It is.
Moreover, in this embodiment, a simple key switch can be formed by simply forming a magnetized portion and a reed switch on a normal push-in / turn-type locking bar lock. Will also be smooth.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of a burglar alarm device of the present invention. FIG. 1 (A) is an overall side view of a bicycle provided with a burglar alarm device of the present invention, and FIG. 1 (B) is a lamp. Sectional view, FIG. 1
(C) is a diagram showing a key.

FIG. 2 shows the first embodiment of the burglar alarm device of the present invention, and is an enlarged explanatory view of a key and a key switch unit.

FIG. 3 shows a burglar alarm device according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of the hub dynamo of the theft alarm device of the present invention.

FIG. 5 is a side view of the hub dynamo of the theft alarm device of the present invention.

FIG. 6 is a sectional view and a front view of a buzzer case having a piezoelectric buzzer of the burglar alarm device of the present invention.

FIG. 7 is a control circuit block diagram of the theft alarm device of the present invention.

FIG. 8 is a control circuit diagram of the burglar alarm device of the present invention.

FIG. 9 is a signal waveform diagram illustrating the operation of the theft alarm device of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Hub dynamo 2 Front wheel 3 Fork 4 Lamp 4K Key switch part 5 Key hole 6 Drum 7, 8 Side panel 9, 10 Bearing 11, 12 Special nut 13 Hub shaft 14, 15 Lock nut 16 Magnet 17 Stator 18 Lead wire 19 Circuit board DESCRIPTION OF SYMBOLS 20 Connector 21, 22 Circuit case 23 Drain hole 24 Spacer 25 Buzzer assembly 26 Rubber seal 27 Oscillation LSI 28 Electric double layer capacitor 29, 30 Buzzer case 31 Piezoelectric element 32 Generator 33 Switch 34 Main lamp 35 Booster circuit 36 Constant voltage circuit 37 Buzzer control circuit 38 Power supply circuit 39 Illumination detection circuit 40 Speed detection circuit 41 Reed switch 42, 45 Switch circuit 43 Buzzer output circuit 44 Sub lamp control circuit 46 Sub lamp 50 Key 5 1 Insertion part 52 Magnetization part 53 Grip part 60 Cylinder 61 Locking bar

 ──────────────────────────────────────────────────続 き Continued on the front page (72) Inventor: Yuki Sato 3-1-1 Nakatsuma, Ageo City, Saitama Prefecture Inside Bridgestone Cycle Co., Ltd. (72) Kenichi Tanaka 3-1-1 Nakazuma, Ageo City, Saitama Prefecture Bridges Toncycle Co., Ltd.

Claims (2)

[Claims] 1. A burglar alarm device in which a generator and a buzzer driven by the generator during running are stored in a wheel hub of a bicycle or the like, wherein the buzzer drive circuit is opened when a key switch circuit is opened by removing a key. In the burglar alarm device to be closed, the key switch is constituted by a reed switch embedded in a key switch portion such as a lamp and a magnetized portion provided on a key. 2. The burglar alarm device according to claim 1, wherein the locking bar is configured to lock the wheel by operating a key switch on the lamp or the like.