JPH11306743A - Control unit - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a magnetic recording device for prolonging the service life of an internal power source while the supply of power from an external power source is cut off. SOLUTION: When the supply of power from an external power source 10 is cut off, a first power saving state is set by a changeover switch 106 and a power failure detecting signal is detected, a control means 107 stops the operation of the main body of equipment and its own operation, stops ticking operation by cutting off the supply of power to a clock means 4 and supplies power only to a data storage means 105. Thus, power consumption can be suppressed and the service life of the internal power source can be prolonged.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a control device mounted on a magnetic recording / reproducing device such as a video tape recorder (hereinafter, referred to as a VTR) having a clock function.

[0002]

2. Description of the Related Art In recent years, equipment such as a magnetic recording / reproducing apparatus uses power from an internal power supply constituted by a battery in a power outage state. For this reason, a power saving operation is required, and a control device for performing the operation is regarded as important.

A conventional control device will be described below with reference to FIG. FIG. 6 is a block diagram showing a configuration of a conventional control device. 1 is a power supply switching means for switching a power supply source to an internal power supply 11 which is a battery provided inside the VTR when power supplied from an external power supply outlet via a power supply cord of a VTR which is an external power supply 10 is cut off. It is. Reference numeral 2 denotes a power supply unit that supplies power supplied from the power supply switching unit 1. 3 outputs a power failure detection signal based on the fact that the power supply voltage of the external power supply 10 becomes equal to or less than a predetermined value in a power failure state in which power supply from the external power supply 10 is cut off,
This is a power failure detection unit that outputs a power failure recovery signal when the restart of power supply from the external power supply 10 is detected based on the fact that the power supply voltage becomes equal to or higher than a predetermined value. Reference numeral 4 denotes a clock unit that performs a hand-moving operation using the power supplied from the power supply unit 2 and manages time required for reserved recording of the VTR. 5 is VT
R stores control data necessary for performing a predetermined operation, and is a data storage means constituted by a DRAM (a random write / read memory which requires a storage holding operation using electric power) which is a volatile memory. is there. 7 operates based on the data stored in the data storage means 5,
When a power failure detection signal is supplied from the power failure detecting means 3, the operation of the VTR main body 12, which is a device main body, is stopped, and only the clock means 4 and the data storage means 5 are operated in a power saving operation with low power consumption. When the signal is supplied, the V which is the main body of the device is determined based on the data stored in the data storage means 5.
Control means for normally operating the TR main body 12 in a predetermined state. The power-saving operation uses a microprocessor or the like to operate at a low voltage using an operation clock (32 KHz) lower than a normal operation clock (for example, 16 MHz), thereby reducing power consumption.

[0004] The operation of the conventional control device configured as described above will be described below. When the power supply from the power plant or the generator to the power outlet is stopped, or the power supply from the external power source 10 is stopped, for example, by disconnecting the power cord from the power outlet, the power source switching means 1 switches the power source to the internal power source 11. Power is supplied by the power supply means 2. When detecting a power failure, the power failure detecting means 3 outputs a power failure detection signal. The control means 7 to which the power failure detection signal is supplied from the power failure detection means 3 stops the operation of the VTR main body 12, supplies the power to the clock means 4 and the data storage means 5, and performs the power saving operation and the data holding operation in a power saving manner. It is executed in a state (low operation clock, low voltage). Then, when the power supply from the external power supply 10 is restarted, the power supply means 2 supplies the power from the external power supply 10 switched by the power supply switching means 1. The control means 7 to which the power failure recovery signal output from the power failure detection means 3 is supplied operates the VTR main body 12 normally based on a normal operation clock using power from an external power supply.

As described above, in this control device, the operation of the VTR main body 12 is stopped by the power saving operation in the power failure state in which the external power supply is cut off, and the hand operation of the clock means and the data holding operation of the data storage means are performed.

[0006]

However, the above-mentioned conventional configuration has a problem that the power consumption in the power failure state is large and the life of the battery serving as the internal power supply is short.

[0007] The present invention solves the above-mentioned conventional problems, and it is possible to extend the life of a battery serving as an internal power supply without increasing the battery capacity by reducing power consumption in a power failure state as much as possible. It is an object to provide a control device.

[0008]

In order to achieve this object, a control device according to the present invention switches a power supply source to an internal power supply provided when the supply from an external power supply is cut off. A power supply switching unit, a power supply unit for supplying power supplied from the power supply switching unit, and a power failure detection signal output when detecting a power failure state in which the power supply from the external power supply is interrupted to supply power from the external power supply. Power failure detection means for outputting a power failure recovery signal when is resumed, clock means for performing a hand movement operation, data storage means for storing information,
Operating means for setting the power saving state at the time of the first power failure to one of a first power saving state or a second power saving state, which will be described later, and an operation based on data stored by the data storage means, When the power failure detection signal is supplied, the operation of the device body is stopped based on the setting of the operation means, the power supply to the clock means is cut off, the hand operation is stopped, the operation of itself is stopped, and When the first power saving state in which only the data storage unit is supplied with power to perform only the data holding operation is realized, the operation of the device main body is stopped, and the power is supplied to the clock unit and the data storage unit. A second power saving state in which a hand operation and a data holding operation are performed and a self-operation is performed, and when the power failure recovery signal is supplied, the first power saving state or the second power saving state is realized. Ministry of 2 It has a configuration in which a control means for releasing the force state.

With this configuration, in a state in which the hand movement of the clock means is not necessary, for example, during a period from manufacture and shipment to use by the user, the operation of the device body is controlled by an external operation command. By stopping the operation, stopping the power supply to the clock means to stop the hand movement operation, and realizing the first power saving state of consuming power only for data retention, the power consumption is reduced and the internal power source is used. The battery life can be extended without increasing the battery capacity, and the number of battery replacements and the number of batteries used can be reduced.

[0010]

BEST MODE FOR CARRYING OUT THE INVENTION
Power supply switching means for switching a power supply source to an internal power supply provided therein when supply from an external power supply supplied from the outside is cut off, power supply means for supplying power supplied from the power supply switching means, A power failure detection unit that outputs a power failure detection signal when detecting a power failure state in which power supply from the external power supply is cut off, and outputs a power failure recovery signal when power supply from the external power supply is resumed, and a clock unit that performs a hand operation. A data storage unit for storing information, an operation unit for setting a power saving state at the time of the first power failure to one of a first power saving state or a second power saving state described later, and When the operation is performed based on the stored data and the power failure detection signal is supplied, the operation of the device main body is stopped based on the setting of the operation means, the power supply to the clock means is stopped, and the hand movement is stopped. The first power saving state in which the operation of the device itself is stopped and only the data storage means is supplied with power to perform only the data holding operation; And a second power saving state in which power is supplied to the data storage unit to perform a hand movement operation and a data holding operation, and to perform its own operation. When the power failure recovery signal is supplied, Control means for canceling the first power-saving state or the second power-saving state. In a state in which the hand movement of the clock means is not required, an external operation command is issued. The power supply to the clock means is stopped to stop the hand operation and the power is consumed only for data retention, thereby realizing the first power saving state. The battery life to be is extended without increasing the battery capacity, an effect that can reduce the use quantity of the number of exchanges and the battery of the battery.

The invention according to claim 2 of the present invention is characterized in that a changeover switch is used as the operating means, and the setting operation of the power saving state at the time of the first power failure is performed by a VTR.
By enabling it in the main unit, it is possible to easily check the setting state only by looking at the operation unit of the VTR main unit.

The invention according to a third aspect of the present invention is characterized in that a switching means based on a signal supplied from an external remote control device is used as the operating means. By enabling the setting operation of the power state from the outside, the dedicated code is transmitted by the remote control in the production process, etc., and various settings of the VTR are performed.
It can be set unattended, improving production efficiency, and can be set remotely by the user without approaching the main body of the VTR, thus reducing the burden on the user. .

According to a fourth aspect of the present invention, the control means is arranged such that N is a positive integer, and the first power saving state is set only in the Nth power outage state after the first power saving state is set. A power saving state after the (N + 1) th power failure state, and a first power saving state in the first N power failure states. In the case where the hand operation of the clock means at the factory or the like is unnecessary, the life of the battery serving as the internal power source is extended without increasing the battery capacity, as long as the number of times of power OFF / ON is N or less, and the number of times of battery replacement And the number of batteries used can be reduced.

According to a fifth aspect of the present invention, there is provided a power supply switching means for switching a power supply source to an internal power supply provided therein when supply from an external power supply is cut off, and the power supply switching means. Power supply means for supplying power supplied from the power supply, and outputs a power failure detection signal when detecting a power failure state in which power supply from the external power supply is cut off, and outputs a power failure recovery signal when power supply from the external power supply is resumed. A power failure detecting means for outputting, a clock means for performing a hand operation only when the time is set, and outputting a time non-setting signal only when the time is not set, a data storing means for storing information, The operation is performed based on the data stored in the data storage means, and when the power failure detection signal is supplied, if the time non-setting signal is output, the operation of the device main body is stopped, A first power saving state is realized in which the power supply to the clock means is interrupted to stop the hand movement operation, stop its own operation, and supply power only to the data storage means to perform only the data holding operation; When the time unset signal is not output, the operation of the device main body is stopped, the clock means and the data storage means are supplied with power to perform the hand movement operation and the data holding operation, and the own operation is performed. Control means for realizing a second power saving state to be performed, and canceling the first power saving state or the second power saving state when the power failure recovery signal is supplied. In the case where the time is not set, the hand operation of the clock means is not necessary, so that the power supply to the clock means is stopped, the hand operation is stopped, and power is consumed only for data retention. By realizing the power state, the power consumption can be reduced, the life of the battery as the internal power supply can be extended without increasing the battery capacity, and the number of times of battery replacement and the number of used batteries can be reduced. Having.

An embodiment of the control device according to the present invention will be described below with reference to the drawings. (Embodiment 1) FIG. 1 is a block diagram showing a configuration of a control device according to Embodiment 1 of the present invention. 1 is a power supply switching means for switching the power supply to the internal power supply when the power supply from the external power supply 10 is cut off, 2 is a power supply means for supplying power from the power supply switching means 1, and 3 is a power supply means for the external power supply 10. When detecting that the voltage V1 is lower than the preset voltage V2, it is determined that the power supply from the external power supply 10 has been cut off and the power supply has entered a power failure state, and a power failure detection signal is output.
When it is detected that the voltage V1 is greater than or equal to the voltage V2, it is determined that the power supply from the external power supply 10 has been restarted, and a power failure detection unit that outputs a power failure recovery signal. Perform operation and VTR body 1
Clock means 10 for performing time management necessary for reserved recording of 2, an external power supply 10 for converting power from a commercial power supply external to the VTR into DC by DC conversion means (not shown), and 11 a battery inside the VTR Internal power supply that supplies power from
Is a VTR main body as a device main body, 105 is a VTR main body 12
The data storage means 106 stores a control data necessary for performing a predetermined operation, and is constituted by a DRAM (a random write / read memory that requires a storage holding operation using power) which is a volatile memory. A changeover switch 10 serving as operating means for designating the operation state of the control device in the power failure state to either the first power saving state or the second power saving state;
7 operates based on the data stored in the data storage means 105 when the power failure detection signal is not supplied from the power failure detection means 3, and operates when the power failure detection signal is supplied from the power failure detection means 3. This is a control means for performing an operation.

The power supply switching means 1 can be constituted by using a diode 201 shown in FIG. FIG. 2 is a circuit diagram showing a configuration of the power supply switching means 1 according to the first and second embodiments of the present invention. Terminal 1a has an external power supply 1
The output voltage V1 is 0, the output voltage of the internal power supply 11 is supplied to the terminal 1b, and the output of the power supply switching means 1 is output from the terminal 1c. The inside of the power supply switching means 1 can be configured using a diode 201, and an anode is connected to the terminal 1a, and a cathode is connected to the terminals 1b and 1c.

The operation will be described below. First, the operation of the power supply switching means 1 will be described. When the electric power is supplied from the external power supply 10 by the electric power from the commercial power supply, the voltage V1 of the external power supply 10 is higher than the voltage of the internal power supply 11, so that the control device uses a diode having a forward bias from the external power supply 10. Power is supplied via the power supply 201. In the case of a power outage state in which the power supply from the external power supply 10 is stopped, such as when the power supply to the power outlet is stopped or the power cord is disconnected from the power outlet, the voltage V1 of the external power supply 10 is lower than the voltage of the internal power supply 11 because External power supply 10
, Power is not supplied via the reverse-biased diode 201, the power supply switching means 1 switches the power supply source to the internal power supply 11, and supplies power from the power supply means 2. The voltage of the internal power supply 11 is the voltage V of the external power supply 10.
No current flows from the internal power supply 11 to the external power supply 10 because the diode 201 which is higher than 1 but has a reverse bias is inserted between them.

Next, the operation of the control means 107 will be described with reference to FIG. FIG. 3 is a flowchart showing the operation of the control means 107. In order to reduce the power consumption at the time of the power failure, the changeover switch 106 is set to the first power saving state in advance. When detecting a power failure, the power failure detecting means 3 outputs a power failure detection signal. The control means 107 to which the power failure detection signal is supplied from the power failure detection means 3 detects the presence of the power failure detection signal in step S1. Then, the control means 107 knows in step S2 that the first power saving state has been set by the changeover switch 106, and causes the data storage means 105 to store that the first power failure has occurred in the first power saving state. The control means 107 determines in step S3 that the power failure has occurred N times (however, N
It is checked whether it is less than or equal to a positive integer). In the power failure state after the Nth time, that is, when the voltage of the external power supply 10 decreases and the power failure detection signal is supplied from the power failure detecting means 3, the operation of the VTR main body 12 is performed in step S4. Is stopped, the power supply to the clock means 4 is cut off in step S5, and the hand operation is stopped. In step S6, the operation of the control means 107 itself is stopped to reduce power consumption, and power supply to only the data storage means 105 is performed. As a result, the first power saving state in which only the data holding operation is executed is realized and executed with power saving.

Thereafter, when the power supply from the external power supply 10 is restarted, the power supply means 2 supplies the power from the external power supply 10 switched by the power supply switching means 1. When the power failure recovery signal output from the power failure detecting means 3 is supplied, the control means 107 knows it in step S7, and in step S8
Then, the first power saving state is released, and the VTR main body 12 is normally operated in a predetermined state based on the data stored in the data storage means 105 and the time by the clock means 4 and based on a normal operation clock. The above operation is repeated up to the N-th power outage state.

Thereafter, in the (N + 1) th and subsequent power failure states, the control means 107 to which the power failure detection signal has been supplied determines the power failure based on the information stored in the data storage means 105 (N + 1).
It is detected that it is the first time or later. Then, the control means 10
7 stops the operation of the VTR body 12 in step S9,
Since the hand operation of the clock means 4 is required, the power is supplied to the clock means 4 and the power is supplied to the data storage means 105 to execute its own operation, the hand operation and the data holding operation in the power saving state. 2 is realized.

Thereafter, when the power supply from the external power supply 10 is restarted, the power supply means 2 supplies the power from the external power supply 10 switched by the power supply switching means 1. When the power failure recovery signal output from the power failure detecting means 3 is supplied, the control means 107 knows it in step S10,
11 to release the second power saving state,
5 on the basis of the data stored and the time by the clock means 4,
Further, the VTR main body 12 is normally operated in a predetermined state based on a normal operation clock.

Incidentally, the changeover switch 106 can be set in advance to the second power saving state. In this case, even in the first to Nth and (N + 1) th and subsequent power failure states, the control unit 107 determines that the power failure detection signal 3 is supplied from the power failure detection unit 3 when the voltage of the external power supply 10 decreases.
In step S9, the operation of the VTR main body 12 is stopped, but the power is supplied to the clock means 4 and the data storage means 105 to execute the hand movement and the data holding operation, and the second power saving state in which the control means 107 operates itself. To achieve.

Incidentally, the data storage means 105 in the first power saving state, or the clock means 4, the data storage means 105 and the control means 107 in the second power saving state are operated normally by a microprocessor or the like (not shown). The operation is performed using an operation clock (for example, 32 KHz) lower than the clock (for example, 16 MHz) and a low power supply voltage by the internal power supply 11, so that a power saving operation with even lower power consumption can be performed.

As described above, according to the present embodiment, in the power failure state where the external power supply 10 is cut off, the clock means 4 is supplied to the clock means 4 based on the setting of the changeover switch 106 as the operating means and the number of power failure occurrences after the setting. Power consumption is reduced by stopping the power supply, stopping the hand movement operation, and consuming power only for data retention, thereby reducing power consumption and increasing the life of the battery, which is the internal power supply, and increasing the battery capacity. It is possible to reduce the number of times of battery replacement and the number of batteries used by extending the battery without causing the battery to be replaced.

A portion 100 enclosed by a broken line in FIG.
Can be similarly realized by software processing in a microcomputer, and is not limited to the present embodiment.

(Embodiment 2) FIG. 4 is a block diagram showing a configuration of a control device according to Embodiment 2 of the present invention. In this figure, the same components as in the prior art are assigned the same numbers and explanations are omitted, and the same components as in FIG. 1 are assigned the same numbers and explanations are omitted. Reference numeral 304 denotes a case where the hand operation is performed by the power supplied from the power supply means 2 only when the time has been set, the time management required for the scheduled recording of the VTR body 12 has been performed, and the user has not set the time. A clock means that outputs a time unset signal and does not perform the hand movement operation; 307 performs an operation based on the data stored in the data storage means 105 when the power failure detection signal is not supplied from the power failure detection means 3; When a power failure detection signal is supplied from the power failure detection means 3, the control means performs the operation described below. As shown in FIG. 4, the control device includes a power supply switching unit 1, a power supply unit 2, a power failure detection unit 3, a clock unit 304, a data storage unit 105 serving as a data storage unit, and a control unit 307. .

The operation of the control means 307 will be described with reference to FIG. FIG. 5 is a flowchart showing the operation of the control means 307. At first, it is assumed that the time is not set by the clock means 304. When detecting a power failure, the power failure detecting means 3 outputs a power failure detection signal. The control means 307 to which the power failure detection signal is supplied from the power failure detection means 3 detects the presence of the power failure detection signal in step S21. Then, the control unit 307 knows that the first power saving state should be set by the time non-setting signal supplied from the clock unit 304 in step S22. The control means 307 determines in step S23 that V
The operation of the TR main body 12 is stopped, and since the time has not been set, the clock means 304 does not need to perform the hand operation even during a power failure, so that the power supply to the clock means 304 is cut off in step S24 and the hand operation is stopped. To stop the operation of the control means 307 itself to reduce power consumption.
By supplying power only to the power supply 05, a first power saving state in which only the data holding operation is executed is realized, and the power saving operation is performed.

Thereafter, when the power supply from the external power supply 10 is restarted, the power supply means 2 supplies the power from the external power supply 10 switched by the power supply switching means 1. When the power failure recovery signal output from the power failure detecting means 3 is supplied, the control means 107 knows it in step S26, and
29, the first power saving state is released and the data storage means 10
5 based on the data stored in the VTR 5 and the time by the clock means 304, and based on a normal operation clock.
2 is operated normally in a predetermined state. If the time is not set in the clock means 304, the above operation is repeated.

Thereafter, it is assumed that the user sets the time of the clock means 304 by an installation operation. Then, it is assumed that the power is again turned off. When detecting a power failure, the power failure detecting means 3 outputs a power failure detection signal. The control unit 307 to which the power failure detection signal has been supplied from the power failure detection unit 3 returns to step S21.
Detects the presence of a power failure detection signal. And control means 307
Knows that the second power saving state should be set because the time non-setting signal is not supplied from the clock means 304 in step S22. The control means 307 stops the operation of the VTR main body 12 in step S30, while the clock means 30
4 and the data storage means 105 are supplied with electric power, perform a hand movement operation even during a power outage, and execute a hand movement operation and a data holding operation for preventing a time deviation from occurring in the clock means 304. In the power saving state.

Thereafter, when the power failure recovery signal output from the power failure detecting means 3 is supplied, the control means 307 proceeds to step S31.
Then, in step S32, the second power saving state is released, and the VTR main body 12 is set to a predetermined state based on the data stored in the data storage unit 105 and the time by the clock unit 304 and based on a normal operation clock. Operate normally in the state of.

Incidentally, the data storage means 105 in the first power saving state, or the clock means 304, the data storage means 105, and the control means 30 in the second power saving state.
In 7, an operation clock (for example, 32 KHz) lower than a normal operation clock (for example, 16 MHz) and a low power supply voltage by the internal power supply 11 are operated by a microprocessor or the like (not shown), so that power consumption is further reduced. Actions can be taken.

As described above, according to the present embodiment, when the time is not set in the clock means 304, the external power supply 1
In a power outage state where 0 is cut off, power consumption is reduced by realizing a first power saving state in which power supply to the clock means 304 is stopped to stop the hand operation and consume power only for data retention. As a result, the life of the battery serving as the internal power source can be extended without increasing the battery capacity, and the number of battery replacements and the number of batteries used can be reduced.

A portion 300 surrounded by a broken line in FIG.
Can be similarly realized by software processing in a microcomputer, and is not limited to the present embodiment.

[0034]

As described above, according to the present invention, in a power failure state,
By stopping the power supply to the clock means and stopping the hand operation based on the setting of the operation means and the number of power failure occurrences after the setting, the first power saving state of consuming power only for data retention is realized. In addition, an excellent effect of reducing power consumption, extending the life of a battery serving as an internal power supply without increasing the battery capacity, and reducing the number of battery replacements and the number of batteries used can be obtained.

Thus, it is not necessary to operate the clock means during the period from manufacture and shipment to use by the user (especially for export equipment, since the time differs depending on the destination, it is meaningless to set the time at the time of shipment. ), Even if the stock period is extended over a long period of time while minimizing power consumption, the life of the internal power supply is infinitely equal to that at the time of shipment (life of a new internal power supply). Therefore, it is possible to prevent a decrease in the electric capacity of the internal power supply when the user starts using it, and to prolong the life of the internal power supply. The effect of being possible is obtained.

[Brief description of the drawings]

FIG. 1 is a block diagram illustrating a configuration of a control device according to a first embodiment of the present invention.

FIG. 2 is a circuit diagram showing a configuration of a power supply switching unit 1 according to the first and second embodiments of the present invention.

FIG. 3 is a flowchart illustrating an operation of a control unit according to the first embodiment of the present invention.

FIG. 4 is a block diagram showing a configuration of a control device according to a second embodiment of the present invention.

FIG. 5 is a flowchart illustrating an operation of a control unit according to the second embodiment of the present invention.

FIG. 6 is a block diagram showing a configuration of a conventional control device.

[Description of Signs] 1 power supply switching means 2 power supply means 3 power failure detection means 4,304 clock means 105 data storage means 107,307 control means 106 changeover switch 10 external power supply 11 internal power supply 12 VTR body

Claims (5)

[Claims] 1. A power supply switching means for switching a power supply source to an internal power supply provided therein when supply from an external power supply supplied from the outside is cut off, and an electric power for supplying electric power supplied from the power supply switching means Power supply detection means for outputting a power failure detection signal when detecting a power failure state in which power supply from the external power supply is cut off, and outputting a power failure recovery signal when power supply from the external power supply is resumed; A data storage means for storing information, an operation means for setting the power saving state at the time of the first power failure to one of a first power saving state or a second power saving state described later, When the operation is performed based on the data stored in the data storage unit and the power failure detection signal is supplied, the operation of the device body is stopped based on the setting of the operation unit, and the power supply to the clock unit is cut off. hand The first power saving state in which the hand operation is stopped and its own operation is stopped and the power is supplied only to the data storage means to perform only the data holding operation is realized, and the operation of the device main body is stopped. A case where power is supplied to the clock means and the data storage means to perform a hand-handling operation and a data holding operation, and to realize a second power-saving state of performing its own operation. A control unit for canceling the first power saving state or the second power saving state when supplied. 2. The control device according to claim 1, wherein a changeover switch is used as the operation means. 3. The control device according to claim 1, wherein a switching device based on a signal supplied from an external remote control device is used as the operation device. 4. The control means causes N to be a positive integer, realizes the first power-saving state only in the N-th power outage state after setting the first power-saving state, and executes the N + 1-th and subsequent power-saving states. The control device according to claim 1, wherein the second power saving state is realized in a power failure state. 5. A power supply switching means for switching a power supply source to an internal power supply provided therein when supply from an external power supply supplied from the outside is cut off, and electric power for supplying power supplied from said power supply switching means. A power supply detection unit that outputs a power failure detection signal when detecting a power failure state in which power supply from the external power supply is cut off, and outputs a power failure recovery signal when power supply from the external power supply is resumed; Clock means for performing a hand movement operation only when set and outputting a time non-set signal only when the time is not set, data storage means for storing information, and data based on the data stored by the data storage means When the power failure detection signal is supplied, if the time non-setting signal is output, the operation of the device main body is stopped, and the power supply to the clock means is cut off. A first power saving state is realized in which the hand operation is stopped, its own operation is stopped, and power is supplied only to the data storage means and only the data holding operation is performed, and the time unset signal is output. If there is no second power saving state, the operation of the device main body is stopped, the clock means and the data storage means are supplied with power to perform the hand movement operation and the data holding operation, and perform their own operations. And a control unit configured to release the first power saving state or the second power saving state when the power failure recovery signal is supplied.