JP2001287624A - Anti-theft system - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prolong a battery life, and allow a smooth operation without causing mismatching between a, lock drive part and a lock mechanism part. SOLUTION: In this anti-theft system having a reception means for generating a signal for driving the lock drive part by prescribed power to operate the lock mechanism part only when a code signal received from a transmission means is consistent with a set authentication code, an output form of driving electric power for the lock drive part is constituted to be controlled in response to an electric power source voltage for driving the drive part. For example, since a motor is fully driven when the power source voltage gets low to require a time for driving (step S30), and since an output of the motor is limited by pulse width modulation(PWM) control when the voltage is high to have a sufficient capacity (step S31), the battery life is enhanced thereby, and the precision of a stop position of the lock drive part and the like are also enhanced thereby.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an anti-theft device for receiving a proper code signal from a transmission means and operating a lock mechanism by a lock drive unit, and intermittently operates a receiving circuit to save energy. The present invention is applied to an anti-theft device configured to detect that a power supply voltage for driving the lock driving unit has dropped below a predetermined value and reset a control system.

[0002]

2. Description of the Related Art In a bicycle, various lock devices have been conventionally proposed in order to prevent theft. As a horseshoe-shaped bar lock which penetrates between spokes of a wheel and is locked, a horseshoe-shaped bar lock is manually formed. Japanese Unexamined Patent Publication No. Hei 8-74458 (Japanese Patent No. 275925), which locks the lock position to hold the lock position and unlocks the bar urged in the unlocking direction by the rotation of the cylinder key.
No. 6) and Japanese Patent Application Laid-Open No. H8-313221. With the development of electronic technology in recent years, lock devices that use a combination of transmission and reception devices have been proposed. In addition to unlocking a manually locked lock with a normal manual key, a lock device compatible with a lock is also available. Japanese Unexamined Patent Application Publication No. Hei 9 (1995) -1995 is configured such that an unlocking control signal is generated in a lock on the receiving means side to perform an unlocking operation only when an optical signal including a preset identification code is received from the transmitting means. 8
Transmission of a radio wave including an ID code from the transmission means side of the one disclosed in JP-A-260784 or the one locked by the rotation of at least one of the front and rear wheels being prevented by pushing the lock bar manually. Thus, only when the ID code from the transmitting means side is identified and collated by the lock side which is the receiving means side, the electromagnetic release valve is operated, and the unlocking is performed by restoring the lock bar. And Japanese Patent Application Laid-Open No. 10-196188.

[0003] On the other hand, the drive unit in these control devices is driven by a power supply battery mounted on a vehicle body such as a bicycle, so that various problems are caused due to a drop in the power supply voltage. Such a tendency in recent years is remarkable in bicycles equipped with an automatic transmission that requires relatively large electric power. As a preventive measure, the present applicant first inhibits the subsequent shifting operation of the transmission when the power supply voltage of the drive device in the control mechanism of the transmission falls below a predetermined value, and after stopping the vehicle, An automatic transmission (Japanese Patent Application No. 8-346160) has been proposed in which the transmission is set to a low-speed position, that is, a so-called "shift position fixing process" is performed. In recent years, even in the field of lock devices for theft prevention, control is stopped when a low battery voltage in which the power supply voltage has dropped below a predetermined value is detected, and when the voltage further drops, the control circuit is reset. Have also been proposed.

[0004]

However, in the anti-theft device provided with the above-mentioned remote-operated lock device,
In order to be able to receive a transmission signal from the transmission means side, it is necessary to always be on standby, so that wasteful energy is wasted on standby power, and the chance of detecting a low battery voltage has been increased. Therefore, as a method of reducing the current at the time of waiting for reception, a method of intermittently operating a receiving circuit or the like to achieve an energy saving effect has been proposed, but the intermittent operation is performed at a constant cycle regardless of the presence or absence of a reception signal. Therefore, depending on the relationship between the time required for signal authentication and the allowable time from when the transmission signal is transmitted to when the device responds, there is a possibility that a sufficient energy saving effect cannot be obtained or the response becomes dull due to mismatch. There was also. In addition, since the lock mechanism that receives and operates the normal signal is driven by a constant power without being stuck in the state of the power supply voltage, the lock mechanism still consumes wasteful power, and the lock drive unit and the lock mechanism unit (Operation of the lock position due to excessive driving due to high battery capacity, stopping halfway due to locking of the lock mechanism due to low battery capacity, etc.). there were.

Accordingly, the present invention solves the problems of the conventional anti-theft device, further improves the battery life, and operates smoothly without causing inconsistency between the lock drive unit and the lock mechanism unit. It is an object of the present invention to provide an anti-theft device that enables the following.

[0006]

Therefore, according to the present invention, a lock mechanism is driven by a predetermined power only when a code signal from a transmitting means is received and an authentication code coincides with the set code. An anti-theft device having a receiving means for generating a signal for operating, wherein an output form of driving power of the lock driving unit is controlled according to a power supply voltage for driving the lock driving unit. Things.
Further, the invention is characterized in that the decrease in the power supply voltage is estimated by an increase in the drive time of the lock drive unit. Further, according to the present invention, when the power supply voltage is equal to or higher than a predetermined value, the output is limited by pulse width modulation (PWM) control to drive the lock driving unit. Further, the present invention is characterized in that when the power supply voltage is equal to or lower than a predetermined value, the lock driving unit is fully driven. Further, the present invention is characterized in that the lock driving unit is fully driven when the previous power supply voltage is equal to or lower than a predetermined value. Further, the present invention is characterized in that, when the lock drive unit does not operate for a predetermined time or more, a second energy saving state is set in which the operation interval of the receiving circuit is increased. Further, the present invention is characterized in that an external clock is attached to the reception control section of the reception means so that the reception control section itself operates intermittently. Further, the present invention is characterized in that a low battery check is performed even before the lock drive unit is driven, and these are used as means for solving the problems.

[0007]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 7 show a first embodiment of the anti-theft device of the present invention. FIG. 1 shows a transmitting means and a receiving means housed in a lock case in the anti-theft device of the present invention employed in a bicycle. FIG. 2 is an overall view of the anti-theft device in the unlocked state, FIG. 3 is an overall view of the anti-theft device in the unlocked state, and FIG. FIG. 5 is a control flow diagram of the anti-theft device, FIG. 6 is a control flow diagram of a reception operation routine, and FIG. 7 is a control flow diagram of a lock operation routine.

According to the present invention, the lock drive unit 5 is driven by the predetermined power only when the code signal from the transmission means 2 is received and the authentication code coincides with the set code.
In the anti-theft device having a receiving means (22) for generating a signal for operating the lock drive unit, the output form of the drive power of the lock drive unit 5 is controlled according to the power supply voltage for driving the lock drive unit 5. It is characterized by having done.
As shown in FIG. 1, a receiving means is a power supply 2 such as a battery provided in a lock case 1 for housing a lock device as an anti-theft device.
3 is provided in the control unit 22 adjacent to the control unit 3.

A lock device accommodated in the lock case 1 is installed in a rear fork or the like facing a rear wheel (not shown) of the bicycle, and is inserted into a space between rear spokes to prevent rotation of the wheel and lock the horseshoe. And a motor that receives signals from transmission means such as the remote controller 2 and operates. 5 and a lock drive unit, speed reduction mechanisms 6, 7, 8 and a key cylinder 13. On the other hand, an operation button 24 for transmitting the code signal is provided on the remote controller 2 that transmits a code signal having a predetermined authentication code to a receiving unit in the control unit 22. Although not shown, the remote controller 2 may be provided with a key for operating a key cylinder 13 described later.

The following components are arranged inside a lock case 1 body defined by a lower case such as a steel plate press molded product and an upper case such as a resin molded product. An electric motor 5 that constitutes a lock drive unit that can be rotated by the power of the power supply 23 only when the code signal from the transmission means 2 such as a remote controller is received and the authentication code matches the set code, and the output of the electric motor 5 A reduction gear that is engaged with the worm gear 6 provided on the shaft and serves as a transmission mechanism is housed therein. The reduction gear includes a worm wheel 7A, a small-diameter spur gear 7B integral with the worm wheel 7A, and a large-diameter spur gear 8 meshing with the spur gear 7B. Is fixed. On the other hand, a substantially middle portion of the lock lever 11 is pivotally supported on the lock case 1 by the support shaft 10, and the lock claw 11 </ b> B of the lock lever 11 urged in the counterclockwise direction by the restoring spring 12 The locking position is locked to the locking notch 3A at the locking position, and the unlocking position is locked to the unlocking notch 3B.

A cam contact portion 11A facing the cam 9 is formed at the right end of the lock lever 11, and is pushed downward by the rotation of the cam 9 to move the lock lever 11 to the clockwise unlocking position. It can be swung (see FIG. 3). A cylinder contact portion 11C is formed at the left end of the lock lever 11, and the cylinder contact portion 11C
Is also pushed upward by a cylinder cam 14 interlocking with the manual rotation of the key cylinder 13 and the lock lever 11
Can be swung to the unlocked position clockwise. The cam contact portion 11 at the right end of the lock lever 11
The detection lever 16 in contact with A is a micro switch 15
And the like, to detect whether the lock lever 11 is in the locked position or the unlocked position.

As shown in FIG. 1, the lock device as the anti-theft device configured as described above moves the bar 3 to the locked position by the finger against the restoring force of the return spring 4.
In the present embodiment, locking is performed manually and unlocking is performed by the restoring force of the return pulling 4. However, the present invention can also be applied to a type in which locking and unlocking are performed by moving a bar by power. . When the bar 3 is manually moved to the locking position, the lock claw 11B of the lock lever 11 urged counterclockwise by the restoring spring 12 falls into the locking notch 3A of the bar 3, locks the bar 3, and locks the bar 3. I do.

In this state, when a normal unlocking signal, which will be described later, is received from the remote controller 2, the motor 5 serving as the lock driving unit is driven to rotate, and the worm gear 6, the worm wheel 7A as the reduction gear, and the small-diameter spur gear 7B The lock lever 11 swings clockwise by the cam 9 rotating via the large-diameter spur gear 8, and the lock claw 11B locks the bar 3 with the notch 3A.
Break away from As a result, the bar 3 is moved to the unlocking position by the restoring force of the return spring 4, and the locking claw 11B is engaged with the unlocking notch 3B of the bar 3 as shown in FIG. Reach. At this time, the microswitch 15 detects and stores the unlock.

It should be noted that the play due to long-term use of the lock mechanism, etc.,
As shown in FIG. 3, when the lock lever 11 is caught and stopped at a position shown in FIG. 3 due to slack, vibration, deformation, wear, or the like, or a low battery voltage is detected. Then, when the voltage further decreases and the control circuit is reset, there is a possibility that the lock lever 11 stops at the same position (the lock lever 11
Because the lock claw 11B in the state is floating in the air,
Even if the locking mechanism is manually moved to the locking position by moving the bar 3 to the locking position, there is a disadvantage that the locking mechanism cannot be locked at the locking position and returns to the unlocking position.) By controlling the output form of the driving power of the lock driving unit 5 in accordance with the power supply voltage for driving the lock driving unit 5 so that the lock driving unit 5 and the lock mechanism unit are connected in advance. Can be smoothly operated without causing a mismatch between the two.

FIG. 4 is a block diagram showing a transmitting means and a receiving means. In the transmitting means on the remote controller 2, the remote controller 2 itself is exposed to the outside in a small frame of a predetermined shape large enough to fit in a pocket or the like. And an operation button 24 (FIG. 1) that constitutes a transmission switch to be operated. Inside the remote controller 2, an LED for displaying the remaining battery level, the transmission state or the lock state (the position of the bar), a communication control unit including a transmission control CPU, a transmission switch, and an authentication value of a unique code signal are stored. An authentication code storage unit, a modulation circuit, a transmission unit, a power supply battery for transmission, and the like. In the present embodiment, only the unlocking operation (clockwise swing of the lock lever 11) is performed by the rotation of the motor 5 on the lock side, which is the receiving means side, but the unlocking of the lock mechanism is performed. In the case of applying to a type in which both the locking and the locking operation are performed by a lock driving unit (for example, a device in which a reduction gear meshes with a tooth portion engraved on the outer periphery of a bar to perform locking and unlocking, etc.), a detecting unit is used. The driving method (forward rotation or reverse rotation) of the next lock drive unit such as an electric motor can be automatically selected based on the detection result of the bar position by the above.

On the transmitting means side, when the operation button 24 is pressed to connect the transmission switch and the transmission signal is transmitted to the communication control unit, the communication control unit transmits the unique authentication code stored in the authentication code storage unit. A signal corresponding to the code is transmitted to the modulation circuit, and the transmission signal TC modulated by the modulation circuit is transmitted from the transmission unit to the air as a specific code signal. In the control unit 22 (FIG. 1) of the receiving means on the lock body side, the receiving power supply PS is started up by a command from the receiving control unit under predetermined conditions (for example, detection of the start of running or turning on of a manual switch) (FIG. Although the illustrated description is omitted, the receiving circuit is configured to intermittently turn on and off the receiving power supply for power saving of the battery), so that the receiving circuit can receive. When the reception signal RS is received and the reception determination unit determines that the reception signal RS is not noise or the like, it is input to the reception control unit as the reception determination signal RJ, and the reception signal RS is stored in the authentication code storage unit. If the authentication codes match, a drive signal LD for driving the electric motor 5, which is a lock drive unit for operating the lock mechanism, is transmitted.

The lock position of the lock lever 11, which is a lock mechanism, is detected by a microswitch 15 that is a lock mechanism drive state detection means, and a lock state detection signal CR is input to a reception control unit. Further, the low voltage detection signal LB is also input to the reception control unit by detecting a voltage equal to or less than a predetermined value of the power supply from the voltage detection unit. At this time, the reception control unit sends a low battery warning signal to the notification unit. Further, the reception control unit is provided with an external clock, and the reception control unit itself is configured to operate intermittently. By using an external clock to measure the time when the receiving circuit is stopped, the external clock is used to start the microcomputer operating clock and operate the receiving circuit when the receiving circuit is stopped. Can be further suppressed.

Next, the control flow of the first embodiment in the lock device which is the anti-theft device of the present invention will be described with reference to FIG. In the present invention, the power supply voltage drop for driving the lock drive unit such as the motor 5 is estimated by increasing the drive time of the lock drive unit. Because of the required characteristics, the drive time of the lock mechanism, which is relatively easy to measure, is used as an index of the power supply voltage. In FIG. 5 (hereinafter, referring to FIG. 4), when the power of the control device is turned on, initialization is performed in step S1, and in step S2, the elapsed time from the previous lock operation exceeds the predetermined value Tk. If it has been (the traveling has been suspended for a considerable period of time by parking a bicycle at home, etc.), the process proceeds to step S3, and the flag is set to H so that the second energy-saving state in which the operation interval of the receiving circuit is increased is set. It is determined in step S4 whether the reception is permitted. If the reception is not permitted, the process proceeds to step S5 and the energy saving state is continued for the Ts time. If the reception is permitted, the process proceeds to step S8 and the reception operation routine to be described later is performed. Is made.

In step S2, if the elapsed time from the previous lock operation has not exceeded the predetermined value Tk and not much time has passed, the process proceeds to step S6, and if reception is not permitted, the process proceeds to step S7. The energy saving state in which the receiving circuit is stopped for a predetermined time Td is continued. Step S6
When it is determined that the reception is permitted, the process proceeds to step S8, and a reception operation routine is performed. As shown in FIG. 6, upon entering the receiving operation routine S8, data initialization is performed in step S9, and then the process proceeds to step S10, where power is supplied to the receiving circuit, and in step S11,
It is determined whether or not the receiving circuit is in the second energy-saving state based on the detection result in step S3. If it is the second energy-saving state, the process proceeds to step S12, where it is determined whether the received signal level is H or not. If the received signal level H is the predetermined time Tb corresponding to the second energy-saving state (the received signal is not a transient noise, It waits for the continuation (corresponding to the time for determining that it is normal) (loop of steps S13, S14, S12). If it is not the second energy saving state, the process proceeds to step S15, where it is determined whether the received signal level is H or not. (Corresponding to the determination time that the operation is performed) (step S1).
6, loops of S17 and S15).

In step S18, it is determined whether or not there is received data. That is, it is detected that the level of the received signal RS is H, and the frequency of the H level is accumulated, and the level is H level even after the lapse of a predetermined time, and the frequency is the predetermined value _ST.
If the above is detected, it is determined in step S20 that there is data, and noise or the like which is a single signal is eliminated. Step S if the power is less than a predetermined value S _T
At 19, it is determined that there is no received data. In the case of normal reception, the reception time of Ta or Tb is extended in step S21, and data is taken in step S22. Returning to the control flow of FIG. 5, step S23
When the received data is detected in, an authentication check routine is started in step S24. If the authentication is successful in step S25, the low battery is detected in step S26 prior to the locking operation, and if the low battery voltage is detected, the low battery is displayed for a predetermined time in step S27 and an alarm is issued, and the If so, a low battery routine for charging or replacing the battery is performed. If the low battery is not detected, the flow shifts to step S28 to shift to the lock operation routine.

FIG. 7 is a control flow of the lock operation routine.
When the lock operation routine is started in step S28, it is determined in step S29 that the drive time required to drive the lock mechanism by the lock drive unit such as the motor 5 is longer than a predetermined value. That is, when H is set in the drive time flag, it is determined that the voltage has dropped and the battery capacity has declined. In this case, it is not practical to limit the power and output the signal anymore, and it is not practical in step S30. The drive is performed by the full drive, and the process proceeds to step S32 to further count the drive time. If the drive time is shorter than the predetermined value in step S29, that is, if the battery capacity is sufficiently high, the output is limited and driven by pulse width modulation (PWM) control or the like which is a power saving mode in which power is limited in step S31. The driving time is further counted in step S32.

In step S33, the driving time of the driving lock driving unit is measured. If the driving time is equal to or longer than the predetermined time, H is set in the driving time flag in step S34. Are compared. If it is within the second predetermined time, the flow shifts to step S37. If it is determined in step S33 that the time is within the predetermined time, the process similarly proceeds to step S37. If it is detected that the lock mechanism has reached the predetermined unlocking position, the process proceeds to step S38. The lock drive unit such as the motor stops. If it is determined in step S35 that the drive time is longer than the fourth predetermined time, it is determined that the detection mechanism such as the lock mechanism or the micro switch is malfunctioning, and an error flag H is set in step S36, and the process proceeds to step S38. Then, the motor stops. In the present invention, step S
H is set in the drive time flag at 34 and step S
If the lock operation is performed again after the lock operation routine is completed and the motor is stopped at 38, since the previous power supply voltage is equal to or lower than the predetermined value, that is, the drive time flag is set to H, the process proceeds to step S30. The motor and the like are configured to be fully driven.

FIG. 8 is a control flow of a lock operation routine showing a second embodiment of the antitheft device of the present invention. In the present embodiment, the control after the determination of the drive time during the drive of the lock drive unit in the first embodiment of FIG. 7 is performed in more detail. In step S29, it is determined that the driving time is shorter than the predetermined time and the battery capacity is high, and H is not set in the flag. The driving time during driving of the motor or the like is counted in step S32 through step S31, and the process proceeds to step S33. If the predetermined time is determined to be longer than the predetermined time, a comparison with a second predetermined time longer than the predetermined time is performed in step S39.
The comparison with the third predetermined time longer than the second predetermined time is determined in step S40.

In step S39, step S33 is executed.
If the time is longer than the predetermined time but shorter than the second predetermined time, it is determined that there is still a certain amount of battery capacity, an output by pulse width modulation (PWM) control is added in step S44, and The shorter driving time flag 1 becomes H level, and the routine goes to Step S46. If it is determined in step S39 that the drive time is longer than the second predetermined time, it is determined that the voltage has decreased and the battery capacity has declined. In step S40, a comparison is made with the longer third predetermined time. If it is within the third predetermined time, the flow shifts to step S42, where the motor and the like are fully driven. In step S43, the slightly longer drive time flag 2 becomes H level, and the flow shifts to step S46. Driving time is 3rd
If the value is equal to or more than the predetermined value, the flow shifts to step S41, where H is set in the error flag indicating that the detection means such as the lock mechanism or the microswitch has failed, and the flow shifts to step S47 to stop the motor and the like. With this configuration, even if the battery capacity is reduced while the lock drive unit is being driven,
The output form of the driving power of the lock drive unit can be more finely controlled in accordance with the degree of decrease in the battery voltage, and it is possible to appropriately respond to the control in accordance with the battery capacity.

Although the embodiments of the present invention have been described above, the types of signal transmission means (for example, not only radio waves but also radio waves) for remote operation between the transmission means and the reception means are within the scope of the invention. , Light, sound, etc.), the shape of the bar, the shape of the return spring, the type, the lock mode of the bar and the lock lever, the cam operation mode of the cam and the lock lever, the type of the lock drive unit such as the electric motor, the drive mechanism unit The detection method of the bar position detection means, which is the lock state detection means, the combination of reduction gears,
Key cylinder installation position, lock lever shape, lock lever operation mode by key cylinder, type of power supply (rechargeable secondary battery, etc.), authentication code setting method, normal reception signal determination mode, low battery detection Form and display form, drive time detection form, pulse width modulation (PWM)
The form of limiting the output of the driving power for control and the like, the power supply of the external clock, and the like can be appropriately selected.

[0026]

As described above in detail, according to the present invention, the lock mechanism is driven by the predetermined power only when the code signal from the transmission means is received and the authentication code matches the set code. In the anti-theft device having a receiving means for generating a signal for operating the unit, by controlling the output form of the driving power of the lock driving unit according to the power supply voltage for driving the lock driving unit, By appropriately consuming power according to the capability of the power supply, it is possible to improve the battery life, and to improve the stop position accuracy of the lock drive unit, and the like. In addition, the power supply voltage can be easily grasped by measuring the drive time of the lock mechanism, which is relatively easy to measure, by estimating the power supply voltage drop by increasing the drive time of the lock drive unit.

Further, when the power supply voltage is equal to or higher than a predetermined value, the output is limited by pulse width modulation (PWM) control to drive the lock driving unit. As a result, it is possible to prevent the lock position from going too far, and energy saving of electric power is achieved. Furthermore, when the power supply voltage is equal to or lower than a predetermined value, the lock driving unit is configured to be fully driven to effectively prevent the lock mechanism unit from being stopped halfway due to the locking of the lock mechanism unit due to the decrease in battery capacity. Can be. In addition, when the previous power supply voltage is equal to or lower than the predetermined value, if the lock drive unit is configured to be fully driven, the lock drive unit such as the motor is immediately fully driven as soon as the next lock operation is started, It is possible to effectively prevent the locking mechanism from being stopped halfway due to a decrease in battery capacity. Furthermore, when the lock drive unit does not operate for a predetermined time or more, the second energy-saving state in which the operation interval of the reception circuit is increased is employed, so that power consumption in the reception circuit by detecting bicycle parking at home or the like is detected. Can be further reduced.

Further, when an external clock is attached to the reception control section of the reception means so that the reception control section itself operates intermittently, power consumption of the internal clock in the reception control section can be further suppressed. Further, when the low battery check is performed even before the lock drive unit is driven, the state of the battery capacity can be grasped in advance in the subsequent lock operation routine, and the lock drive unit suddenly stops. Panic and the like can be avoided. You.
As described above, according to the present invention, there is provided an anti-theft device capable of further improving battery life and enabling smooth operation without causing inconsistency between the lock drive unit and the lock mechanism unit.

[Brief description of the drawings]

FIG. 1 shows a first embodiment of the anti-theft device of the present invention, in which the transmitting means and the receiving means housed in a lock case of the anti-theft device of the present invention employed in a bicycle are locked. 1 is an overall view of a lock body shown in FIG.

FIG. 2 is an overall view of the anti-theft device in an unlocked state.

FIG. 3 is an overall view of the anti-theft device with the lock lever in an unlocked state.

FIG. 4 is a control block diagram showing a transmission unit and a reception unit.

FIG. 5 is an overall control flowchart of the anti-theft device.

FIG. 6 is a control flowchart of the reception operation routine.

FIG. 7 is a control flow chart of the lock operation routine.

FIG. 8 is a control flow chart of a lock operation routine showing a second embodiment of the antitheft device of the present invention.

[Explanation of symbols]

 Reference Signs List 1 lock case 2 remote controller (transmitting means) 3 bar (lock mechanism) 3A locking notch 3B unlocking notch 4 return spring 5 motor (lock driving unit) 6 worm gear 7A worm wheel (reduction gear) 7B small diameter spur gear (reduction gear) 8) Large-diameter spur gear (reduction gear) 9 Cam 10 Support shaft 11 Lock lever 11A Cam contact portion 11B Lock claw 11C Cylinder contact portion 12 Restoring spring 13 Key cylinder 14 Cylinder cam 15 Micro switch (detection means) 16 Detection Lever 22 Control unit (receiving means) 23 Power supply 24 Operation button PS Receive power supply RS Receive signal RJ Receive discrimination signal LB Low battery detection signal LD Drive signal CR Lock state detection signal TC Transmission signal

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) E05B 49/00 E05B 49/00 L NT 71/02 71/02 K H04Q 9/00 301 H04Q 9/00 301B (72) Inventor Nobutoshi Kasuga 3-1-1 Nakatsuma, Ageo-shi, Saitama F-term (reference) in Bridgestone Cycle Co., Ltd. 2E250 BB08 BB35 BB66 CC18 CC27 DD06 DD10 FF24 FF36 FF37 FF39 HH00 TT03 5K048 AA16 BA41 BA52 CA11 DB01 DC01 EA16 FA07 HA04 HA06 HA11 HA34 HA37

Claims (8)

[Claims] 1. Receiving means for receiving a code signal from a transmitting means and driving a lock driving section with predetermined power to generate a signal for operating a locking mechanism section only when the authentication code matches the set code. In the anti-theft device having
An anti-theft device configured to control an output form of driving power of the lock driving unit according to a power supply voltage for driving the lock driving unit. 2. The anti-theft device according to claim 1, wherein the power supply voltage drop is estimated by an increase in the drive time of the lock drive unit. 3. The lock drive unit according to claim 1, wherein when the power supply voltage is equal to or higher than a predetermined value, the output is limited by pulse width modulation (PWM) control to drive the lock drive unit. Anti-theft device. 4. The anti-theft device according to claim 1, wherein when the power supply voltage is equal to or lower than a predetermined value, the lock driving unit is fully driven. 5. The anti-theft device according to claim 1, wherein the lock driving unit is fully driven when the previous power supply voltage is lower than a predetermined value. 6. The apparatus according to claim 1, wherein when the lock drive unit does not operate for a predetermined time or more, a second energy saving state is set in which an operation interval of the receiving circuit is increased. Anti-theft device as described. 7. The anti-theft device according to claim 1, wherein an external clock is attached to a reception control section of said reception means so that the reception control section itself operates intermittently. . 8. The anti-theft device according to claim 1, wherein a low battery check is performed even before the lock drive unit is driven.