JP2000333054A - Electric device, its control method, video camera and its control method - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid a power supply from being suddenly removed from a body of an electric device operated by a removable power supply. SOLUTION: An actuator 108 and a lock mechanism 114 lock a power supply 109 by an instruction of a microcomputer 104 so that, the power supply 109 mounted on a video camera main body cannot be removed, and the microcomputer 104 controls each section so that no problem is caused to the video camera even when the power supply is removed in the ease that an operation entry is made by a power supply removal switch 107. After the end of the control operation, the locked state by the actuator 108 and the lock mechanism 114 is released by an instruction of the microcomputer 104 so that the power supply 109 mounted on the video camera main body is removed.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an electric device operated by a power supply detachable from a main body such as an AC adapter or a battery pack, a control method thereof, a video camera and a control method thereof.

[0002]

2. Description of the Related Art Conventionally, in an electric device having a power supply detachable from a main body such as an AC adapter or a battery, the power supply is mounted by a mechanical lock mechanism which can be freely detached by a user. That is, the power supply terminal on the power supply side is held in contact with the power supply terminal on the main body side by a spring pressure, a stopper arm, or the like, and power is continuously supplied, and the power supply terminal can be removed by sliding a mechanical lever or the like. Possible structure.

[0003] Such a system can be realized with a very simple mechanical structure and is therefore excellent in cost, and is widely used in small electric equipment such as a video camera.

FIG. 7 is a block diagram showing a main part of a conventional video camera. In FIG. 7, reference numeral 501 denotes a camera for photographing an image; 502, a cassette tape on which the photographed image is recorded; 503, signal processing of photographed image information;
Reference numeral 504 denotes a signal processing unit to be written in 2 and a microcomputer for controlling the entire video camera system.

[0005] A volatile memory 505 stores specific screen data among image data processed by the signal processing means 505, and temporarily stores and holds user setting information such as a recording mode and a title. 50
Reference numeral 6 denotes a non-volatile memory capable of holding the user setting information and the like held in the volatile memory 505 even when the power of the video camera body (VTR body) is turned off.

Reference numeral 507 denotes a power supply for supplying power to the entire video camera, 508 denotes a lock mechanism for mechanically locking the power supply 507 to the video camera main body, and 509 denotes a group of VTR operation switches for the user to operate the video camera main body. , 510 are display means for displaying an image of the camera 501 or a reproduced image from the cassette tape 502. 511 is a capstan motor for loading the cassette tape 502 and running the tape, and 510 for recording and reproducing. This is a mechanical mechanism on which a magnetic head and the like are mounted.

Conventional video cameras are roughly classified into two modes: a camera mode for photographing a camera and recording on a cassette tape 502, and a VTR mode for reproducing images and sounds recorded on a tape. Therefore,
The operation of the video camera body will be briefly described below, divided into a camera mode and a VTR mode.

[0008] In the camera mode, the user processes an image captured by the camera 501 into signal processing means 503.
Through the cassette tape 502. The recording in the camera mode includes movie recording for recording ordinary moving images and sounds, and still image recording for continuously recording still images and sounds stored in a memory for a predetermined time.

First, the user operates the power switch to put the VTR body in the camera mode, operates the zoom switch and the like to determine a desired angle of view by the display means,
Recording is started by pressing a recording start / stop key. When the recording mode is the normal movie mode, the signal processing unit 503 sequentially records image data output from the camera 501 on the cassette tape 502, thereby performing recording as a moving image.

When the recording mode is the still image recording mode, the signal processing means 503 temporarily stores the image at the moment when the start / stop key is pressed down in the volatile memory 505.
The still image is recorded by recording the data in the memory on the cassette tape 502 for a certain period of time. At the time of recording a still image, PPID data indicating that the image is a still image is recorded for a fixed time simultaneously with the still image data.

This is because a still image search can be performed by searching the PPID recorded here later. The switches and keys described here are VTR operation means existing in the VTR operation switch group 509. The microcomputer 504 reads the state, and the camera 501, the signal processing means 503, the volatile memory 505 according to the result. These functions are realized by controlling the mechanical mechanism 511 and the like.

On the other hand, in the VTR mode, the user can play back the image and the sound recorded on the cassette tape 502 and confirm it by the display means 510. For example, when playing a tape, the user sets the power switch to VT.
When the reproduction key is pressed in the R mode, the signal processing means 5
Numeral 03 retrieves image data from the cassette tape 502, performs signal processing on the image data, and outputs the processed signal to the display unit 510 for reproduction.

When the fast-forward / rewind key is pressed, the mechanical mechanism 511 runs the tape at a high speed in the designated direction. As in the case of the camera mode, the switches and keys described here are used in the VTR operation switch group 509.
The VTR operating means in the
4 reads the state, and according to the result, the camera 50
1. These functions are realized by controlling the signal processing means 503, the volatile memory 505, the mechanical mechanism 511, and the like.

[0014]

However, in the above-mentioned conventional electric equipment, an AC adapter and a battery are required.
Since the structure is such that the user can freely remove the power, the power is suddenly shut down even when the electric device is operating / data is being transferred, which causes various problems.
The possible problems are listed below, taking a video camera or the like as an example.

(1) When the power is removed during FF / REW, tape damage is caused because the tape running is suddenly stopped while the capstan and the pinch roller are pressed and tension is applied.

(2) If power is removed during recording,
Since the power is suddenly turned off before the recording end processing is performed, the recording track at that point is not formed correctly.
Further, when the power is turned on again and then recorded, the previously recorded scene and the overwritten scene are not correctly connected.

(3) During operation in the camera mode, if the power is removed while the zoom lens is at the wide or telephoto end, and if the power is turned on again thereafter, it may not be possible to move from the lens position.

(4) When there is an item such as a recording mode and title information which is set by a user and is written in the nonvolatile memory to maintain the state, the user sets the setting before writing to the nonvolatile memory or writes the data. If the power is removed during the operation, the set items disappear.

(5) A video camera capable of taking a still image into a volatile memory built in the main body and transferring the still image to a PC or rewriting a large-capacity medium such as a cassette tape or a smart media. Alternatively, in a photographing device such as a digital camera, if the power is removed during or before the captured still image information is being transferred to another medium, the captured data is erased.

There were problems such as the following.

SUMMARY OF THE INVENTION The present invention has been made to solve the above-described problems, and an electric apparatus, a control method thereof, a video camera, and a control method thereof, in which a power supply is prevented from being suddenly removed from a main body. The purpose is to provide.

[0022]

SUMMARY OF THE INVENTION An electric apparatus and a control method thereof, a video camera and a control method thereof according to the present invention are configured as follows.

(1) In an electric device operated by a detachable power supply, an operation control means for controlling the operation of the electric device main body, and a state in which the power supply mounted on the electric device main body cannot be detached from the electric device main body. Lock means for locking the lock, unlock means for releasing the locked state, operation means for performing an operation input when removing the power supply, and lock for controlling the unlock means in response to the operation input Release control means, the operation control means performs a predetermined evacuation control operation when the operation input is received, and after the evacuation control operation is completed, the lock release control means changes the state locked by the lock release means. Canceled.

(2) In an electric device operated by a detachable power supply, an operation control means for controlling the operation of the electric device main body, a power supply room for accommodating the power supply, and a lid for opening and closing a power supply opening of the power supply room. Locking means for locking the lid in a state in which it cannot be opened and closed; unlocking means for releasing the locked state; a lid opening instruction member for inputting an operation when opening the lid; A lock release control means for controlling the lock release means in response to an operation input by the lid instruction member, wherein the operation control means performs a predetermined evacuation control operation when the operation input is received, and completes the evacuation control operation. Later, the lock release control means releases the state locked by the lock release means.

(3) In the electric equipment of (1) or (2), the operation control means and the lock release control means are operated by the power of the mounted power supply.

(4) In the electric equipment of (1) or (2), the unlocking means and the unlocking control means are operated by the power of a power supply different from the mounted power supply.

(5) In any one of (1) to (4) above, the predetermined evacuation control operation is an operation of storing control data used for operation control of the main body of the electric device in a predetermined storage element.

(6) In any one of the above-mentioned electrical devices (1) to (5), the electronic device may have a warning means for performing a warning operation when the lock release control means cannot control the lock release means. did.

(7) In a control method of an electric device operated by a detachable power supply, an operation control means controls an operation of the electric device main body, and a power supply mounted on the electric equipment main body is locked by the electric device main body. The power supply is locked to a state where it cannot be removed from the power supply, the locked state is released by unlocking means, and the lock is released by the lock release control means in response to an operation input by an operation means for performing an operation input when removing the power supply. When the operation input is received, the operation control unit performs a predetermined evacuation control operation, and after the evacuation control operation is completed, the lock release control unit releases the state locked by the lock release unit. I tried to make it.

(8) In a control method of an electric device operated by a detachable power supply, the operation of the electric device main body is controlled by an operation control means, and a lid for opening and closing a power supply opening of a power supply room containing the power supply is locked. Means for unlocking the locked state, unlocking the locked state by unlocking means, and unlocking means in response to an operation input by an opening instruction member for inputting an operation when opening the lid. Is controlled by unlock control means, and when the operation input is received, the operation control means performs a predetermined evacuation control operation, and after completion of the evacuation control operation, the unlock control means is locked by the unlock means. The state was canceled.

(9) In the method of controlling an electric device according to (7) or (8), the predetermined evacuation control operation is an operation of storing control data used for operation control of the main body of the electric device in a predetermined storage element. .

(10) In the control method of any one of the above (7) to (9), a warning operation is performed by the warning means when the lock release control means cannot control the lock release means. I did it.

(11) In a video camera operated by a detachable power supply, operation control means for controlling the operation of the video camera main body, and a state in which the power supply mounted on the video camera main body cannot be detached from the video camera main body. Lock means for locking the lock, unlock means for releasing the locked state, operation means for performing an operation input when removing the power supply, and lock for controlling the unlock means in response to the operation input Release control means, the operation control means performs a predetermined evacuation control operation when the operation input is received, and after the evacuation control operation is completed, the lock release control means changes the state locked by the lock release means. Canceled.

(12) In the video camera of the above (11), the operation control means and the lock release control means are operated by the power of the mounted power supply.

(13) In the video camera of the above (11), the unlocking means and the unlocking control means are operated by the power of a power supply different from the mounted power supply.

(14) In any one of the video cameras (11) to (13), the predetermined evacuation control operation is an operation of storing control data used for operation control of the video camera body in a predetermined storage element.

(15) In any one of the above-mentioned video cameras (11) to (14), the predetermined evacuation control operation is an operation of storing image data stored in the video camera body in a predetermined storage element.

(16) In any one of the video cameras (11) to (15), the predetermined retreat control operation is an operation for resetting the lens position.

(17) In any one of the above-mentioned video cameras (11) to (16), the predetermined retreat control operation is the end of recording on the magnetic tape and the positioning operation of the magnetic tape.

(18) In any of the above-mentioned video cameras (11) to (17), the predetermined retraction control operation is an operation for stopping the feeding of the magnetic tape.

(19) The video camera according to any one of (11) to (18), further comprising a warning means for performing a warning operation when the lock release control means cannot control the lock release means. did.

(20) In a control method of a video camera operated by a detachable power supply, the operation of the video camera main body is controlled by operation control means, and the power supply attached to the video camera main body is not detached from the video camera main body. The locked state is unlocked by a lock release means, and the lock is released by a lock release control means in response to an operation input by an operation means for performing an operation input when removing the power supply. When the operation input is received, the operation control unit performs a predetermined evacuation control operation, and after the evacuation control operation is completed, the lock release control unit releases the state locked by the lock release unit. I tried to make it.

(21) In the video camera control method of the above (20), the predetermined evacuation control operation is an operation of storing control data used for operation control of the video camera body in a predetermined storage element.

(22) In the video camera control method according to the above (20) or (21), the predetermined evacuation control operation is an operation of storing image data stored in the video camera body in a predetermined storage element.

(23) In any one of the video camera control methods (20) to (22), the predetermined retreat control operation is an operation for resetting the lens position.

(24) In the video camera control method according to any one of the above (20) to (23), the predetermined retreat control operation is the end of recording on the magnetic tape and the positioning operation of the magnetic tape.

(25) In any of the video camera control methods (20) to (24), the predetermined retraction control operation is an operation for stopping the supply of the magnetic tape.

(26) In any one of the video camera control methods (20) to (25), a warning operation is performed by the warning means when the lock release control means cannot control the lock release means. I did it.

[0049]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS This embodiment will be described below using a video camera.

(First Embodiment) FIG. 1 is a block diagram showing a configuration of a video camera according to a first embodiment. In FIG. 1, reference numeral 101 denotes a camera that performs image capturing; 102, a cassette tape (magnetic tape) on which the captured image is recorded; 103, which performs signal processing of the captured image information;
Signal processing means 104 for sequentially writing the processed data on the cassette tape 102, and a microcomputer (operation control means) 104 for controlling the entire video camera system. A volatile memory 105 stores data of a specific screen among image data processed by the signal processing unit 103 and temporarily stores and holds user setting information such as a recording mode and a title. This is a nonvolatile memory that can hold user setting information and the like held in the volatile memory 105 even when the power of the video camera body is turned off.

Reference numeral 107 electrically unlocks the power supply,
A removal switch (operating means) as a power supply removing mechanism capable of removing a power supply; an actuator (locking means, unlocking means) 108 for locking / unlocking the power supply according to a setting from the microcomputer 104;
Reference numeral 109 denotes a power supply for supplying power to the entire video camera;
Reference numeral 0 denotes an auxiliary power supply provided in addition to the power supply 109.

Reference numeral 111 denotes a VTR operation switch for the user to operate the video camera body, and 112 denotes the camera 101.
A display means 113 for displaying the image of the cassette tape 102 or a reproduced image from the cassette tape 102. The cassette 113 is loaded with a capstan motor for running the tape, a magnetic head for recording and reproducing, and the like. This is the mechanical mechanism that has been implemented. Reference numeral 114 denotes a lock mechanism for locking the power supply to the video camera body.

In the video camera of this embodiment, the same operation as in the related art is performed in recording in the camera mode and reproduction in the VTR mode. Therefore, if the power supply is removed during the operation, various problems are caused as described above.

Hereinafter, a power lock device (power supply attaching / detaching device) in a video camera which is a feature of the present embodiment will be described.

This device is characterized in that a power source such as a battery is mechanically locked and the unlocking is electrically controlled. In other words, if there is a problem if the power of the video camera is removed, the microcomputer detects the condition and locks it electrically so that the user cannot remove the power. It is.

The power lock device is roughly composed of a power removal switch 107, an actuator 108, and a microcomputer 104 for controlling them. In the operation state of the video camera, the microcomputer 104 controls each part of the video camera as described above. During this operation state, the microcomputer 104
A command for instructing power supply lock is issued to the power supply unit 8. Here, when the power supply removal switch 107 is operated, the microcomputer (lock release control means) 104 controls (evacuates) each unit so that there is no problem even if the power supply of the video camera body is removed, and such a state is established. After confirming that the lock release command has been issued, a lock release command is issued to the actuator 108. The actuator 108 receives the command and releases the battery lock mechanism 114, so that the user can remove the battery.

FIG. 2 is a flowchart showing the operation procedure of the microcomputer 104 when the battery is removed. Hereinafter, this flowchart will be described in detail. In addition,
This operation is executed based on a program stored in the ROM in the microcomputer 104 in accordance with an instruction from the CPU in the microcomputer 104.

First, in step S101, the microcomputer 104 checks whether the power supply removal switch 107 has been pressed. If the button has not been pressed, the process returns to the beginning and the normal processing is continued. If it is detected that the button has been pressed, then in step S202, the video camera checks whether recording is in progress. This confirmation is performed regardless of the normal moving image recording / still image recording described above.

That is, in either recording mode,
If the recording is being performed, the recording current is turned off and then a recording end process SS103 such as a splicing operation for recording on the tape is performed. When this recording end operation is completed,
Next, the microcomputer 104 checks the lens position,
If there is a lens at one of the wide ends, a lens position reset S105 is performed so as to avoid that. This is because if the power of the zoom lens is at such an end and the power is turned off and the power is not turned on for a long time, the power is then turned on and the zoom lens is to be moved. This is a process for avoiding a problem that does not operate normally.

Finally, the microcomputer 104 checks whether the mechanical mechanism 113 is in the STOP state. If it is not in the stop state, the mechanical mechanism 113 is controlled to shift to STOP in step S207. After performing these checks and operations corresponding to the results, the microcomputer 10
No. 4 issues a lock release command to the actuator 108 which is a power lock mechanism, and the power can be removed for the first time.

With the above-described configuration and procedure, when the video camera body is in a state where the power supply cannot be removed, the power supply is removed and electrically locked to avoid various problems. It is possible to do.

Next, the structure and operation of the power lock device will be described in more detail with reference to FIG. FIG. 3 is a circuit block diagram showing a battery lock mechanism according to the first embodiment. It is assumed that this device is provided around a dedicated battery mounting space provided in a video camera body.

In FIG. 3, reference numeral 201 denotes a microcomputer (the microcomputer 104 shown in FIG. 1) for controlling the apparatus and the entire video camera.
, 202 is a regulator for keeping the power supply voltage constant, 203 is a switch controlled by the microcomputer 201, and 204 is an
An electromagnet to be N / OFF, 205 is a stopper for locking the battery, and 206 is a spring for urging the stopper 205 in the direction of the arrow.

Reference numeral 207 denotes a battery (corresponding to the power supply 109 in FIG. 1), reference numeral 208 denotes a terminal which is attached to the main body side and supplies power to the video camera main body by contacting a power supply terminal of the battery, and reference numeral 209 denotes a mechanically connected battery. The slide lock 210 can be removed from the slide lock 210.
A power removal switch 9 is pressed when the lock is released, and an AC adapter 211 is used to supply power from the auxiliary power supply 110 in FIG. 213,214
Is a resistor, and 215 and 216 are diodes.

Next, the operation of this device will be described in detail. First, if there is no power supply or auxiliary power supply,
Is biased by a spring 206 in the direction of the battery (in the direction of the arrow) about a fulcrum attached to the main body.
This is a state where the battery 207 is locked when it is present. When the battery is inserted from this state, the battery slides on the taper attached to the surface of the catch 205 on the battery side, so that the battery can be properly fitted in the mounting space for the battery.

In this state, the catch 205 is
07 fits into the locking groove formed on the exterior,
That is, the battery 207 is locked. The user further fixes the battery with the slide lock 209. This operation physically fixes the battery and sets the power removal switch 210 to the open state.

When the battery is attached to the video camera main body in this way, power is supplied to the regulator 202 through the power supply terminal 208 on the main body side. Then, the regulator 202 adjusts the battery voltage to a fixed voltage 21.
2A is generated in the entire video camera including the microcomputer 201. At this point, the signal 212B from the battery removal switch is in the “H” state because it is pulled up to the constant voltage 212A. Then, the microcomputer 30
1 is an open state of the electromagnet ON / OFF switch 203 in response to the signal 212C, that is, the electromagnet 204 is turned off.
In the F state, the battery 207 is electrically locked.

With the above-described operation and action,
The power is supplied to the video camera body, and the battery 207, which is the power supply source, is electrically locked. In this state, the VTR operation as described above is performed. Next, an operation for removing the battery 207 will be described.

To remove the battery 207, the user first slides the slide lock 209 in the direction of the arrow to physically unlock the battery, and at the same time, closes the battery removal switch 210 to connect the microcomputer 201 to the microcomputer 201. The signal 212B is set to the “L” state. When detecting this state, the microcomputer 201 closes the switch 203 and turns on the electromagnet 204 by a signal 212C.
Then, the catch 205 is attracted to the electromagnet 204 by the magnetic force, and the lock on the battery 205 is released.

However, this unlocking operation is performed according to the procedure described in the description of the flowchart of FIG. 2 in the present embodiment, and the unlocking is performed until the video camera body is ready to remove the battery. It will not be done.

Here, the role of the auxiliary power supply 111 in FIG. 1 will be described. The auxiliary power supply 111 can supply stable power from a power supply terminal via an AC adapter 211 or the like.
When the battery lock by the lock 205 cannot be released, the battery can be removed by supplying power to the video camera body in an auxiliary manner.

The state in which the battery lock cannot be released means that the power of the video camera body has been reduced for a long time while the battery 207 is attached to the video camera body, and the microcomputer 301 cannot operate. ,
In this state, the electromagnet 204 cannot attract the stopper 205. The battery 207 and the auxiliary power supply 111 are separated from each other by diodes 215 and 216 mounted on respective power supply lines. When both power supplies are present, the higher voltage is supplied to the regulator 202. It has a configuration.

Naturally, auxiliary power supply 110 may be a secondary battery that is charged by battery 207 during normal use, but the configuration in that case will not be described in detail here.

In the configuration shown in FIG. 3, a means for electrically locking the power supply is realized by using an electromagnet 204 and a stopper 205 urged by a spring 206. One of the features is that in order to make effective use of the limited power of the battery, to lock the battery during normal use, it is done by the force of the spring, and when releasing it, the electromagnet is turned on only after Power is being used.

Further, instead of such a mechanism, it is also possible to use a small motor and a member that slides with the motor. Again, this will only use power to lock or unlock,
The battery can be used effectively.

(Second Embodiment) FIG. 4 is a block diagram showing a configuration of a video camera according to a second embodiment. A feature of the present embodiment is that the video camera body includes a digital interface 306 that enables communication with an external device (hereinafter, referred to as a PC) 312 such as a personal computer. With this digital interface 306,
Image and audio data can be transmitted to the external PC 312 via the digital signal line 315, and a command for operating the video camera body can be received from the PC 312 at the same time.

Hereinafter, the details of this embodiment will be described with reference to FIG. The video camera according to the present embodiment can record a normal moving image and a still image on the cassette tape 302 through the signal processing unit 303 in the camera mode as in the related art. Further, as a new function, a memory camera function of holding a still image at the moment when the shutter is released in the volatile memory 305 is provided.

The volatile memory 305 has a capacity of about 2 [Mbytes].
Assuming that all of the capacity is used for storing the still image data, about 20 still images can be captured as compressed data. The still image stored here is processed by the signal processing unit 303.
Is decompressed and output to the display means 314. In addition, the cassette tape 30
2 can be recorded in a still image recording format. Further, the data can be transferred to an external PC 312 via the digital interface 306.

All the functions of the VTR and the memory camera described above are performed by the microcomputer 304 by the VTR operation switch group 3.
11 receives an operation input from the camera 3 and responds to the input.
01, the signal processing means 303, the volatile memory 305, the digital interface 306, and the like, but the details are not described here.

FIG. 5 is a flowchart showing the control means at the time of power supply removal in this embodiment. Hereinafter, this flowchart will be described in detail. The operation is executed based on a program stored in the ROM in the microcomputer 304 in accordance with an instruction from the CPU in the microcomputer 304.

The microcomputer 304 first checks in step S201 whether the power supply removal switch 307 has been pressed. If it is detected that the button has been pressed,
In step S202, it is confirmed whether the video camera body is communicating with the PC 312 via the digital interface 306.

If communication is in progress, step S20
In step S204, a check is made to see if any unprocessed image data remains in the volatile memory 305. Here, “unprocessed” means that after an image is loaded into the volatile memory 305 by the method described above,
12 and the cassette tape 3
02 also shows a state in which the image data is not recorded as a still image.

If there is no unprocessed image, it is assumed at this point that the power supply lock is released to the actuator 309 to release the lock mechanism 314 and the power supply can be removed. On the other hand, if there is an unprocessed image,
Is a display means (warning means) 314 via a signal processing means.
A warning that there is an unprocessed image is generated at the same time, and at the same time, a user input about the subsequent processing method is accepted.

In this embodiment, there are three types of options. The first is a method of recording a still image on a tape.
The microcomputer 304 checks in step S206 whether the user input selects an item to be recorded on the tape, and if so, in step S207, records the unprocessed image data on the cassette tape 302 in a still image sequence. The second and third options are to stop taking out the power supply and to forcibly remove the power supply even if data remains.

In step S208, the microcomputer 30
Step 4 checks whether the user input has selected to remove the power supply ignoring the warning. If so, the power supply is unlocked in step S209 to allow the user to remove the power supply.
If not, the power supply is stopped and the process returns.

Although not described in FIG. 5, step S
After checking the power supply removal switch 307 in 201 and before instructing the actuator 308 to unlock in step S209, the same check and processing operations as those performed in the flowchart of FIG. 2 can be performed. It is.

Also in this embodiment, the auxiliary power supply 310
Is used to provide auxiliary unlocking means when unlocking becomes impossible due to the consumption of the battery, in exactly the same manner as in the first embodiment in its configuration and operation.

(Third Embodiment) FIG. 6 is a circuit block diagram showing a battery lid locking mechanism according to a third embodiment.
A power supply attachment / detachment mechanism for electrically controlling battery removal by locking the battery lid will be described. In FIG. 6, reference numeral 401 denotes a battery which is a power supply for supplying electric power to electric equipment; 402, a regulator for adjusting the voltage from the battery 401 to a constant voltage; 403, a microcomputer for controlling the entire electric equipment; 405 is a slide lock for opening and closing the battery cover, 406 is a slide lock 40
Reference numeral 407 denotes a lock pin for locking the battery cover 404.

Reference numeral 408 denotes a motor for controlling locking / unlocking of the battery cover by sliding the lock pin 407 laterally via a worm gear. Reference numeral 409 denotes a switch for operating the motor 408.

Reference numeral 410A denotes a power supply (supply voltage) of the microcomputer 403 stabilized by the regulator;
B indicates that the microcomputer 403 operates the battery removal switch 406.
, A motor control signal for controlling the operation of the motor 408 by the microcomputer 403, and a motor forward / reverse switching signal for controlling forward / reverse rotation of the motor. .

Next, the operation of the power supply attaching / detaching mechanism will be described in detail. First, when a battery is attached to the electric device and the battery cover 404 is mechanically locked by the slide lock 405, power is supplied from the battery 401 to the electric device, and the operation of the entire system including the microcomputer 403 is performed. Be started. At this time, slide lock 40
Reference numeral 5 denotes a state in which the battery removal switch 406 is not pressed. When the microcomputer 403 detects this state based on the signal 410B, the microcomputer 403 detects the motor control signal 410C.
And the motor 4 according to the motor forward / reverse switching signal 410D.
08, and the lock pin 407 is
Is moved in the locking direction (rightward direction in FIG. 6) to lock the battery cover 404.

The operation for taking out the battery will now be described. First, when the lock state of the slide lock 405 is released, the battery removal switch 406 is provided.
Is pressed. When the microcomputer 403 detects this state based on the signal 410B, the microcomputer 403 first controls the electric device main body so that the power supply can be removed.

The “removable state of the power supply” here differs depending on the electric equipment to which the present embodiment is applied. Then, the motor control signal 410C
And the motor 4 according to the motor forward / reverse switching signal 410D.
08 is rotated in the direction opposite to the direction in which the battery cover is locked, and the lock pin 407 is moved in the direction for unlocking the battery cover 404 (leftward in FIG. 6) to release the lock on the battery cover 404.

When the locking / unlocking of the battery cover is electrically controlled by the method described above, the problem that occurs when the power supply of the conventional electric equipment is suddenly removed is similar to the case where the battery is directly locked. Points can be prevented in advance.

Even if it becomes impossible to operate the video camera due to a decrease in the power of the battery, the battery can be taken out using another power supply.

As described above, in the first to third embodiments,
It is possible to avoid sudden removal of the battery of the video camera with a simple configuration.

Further, by saving the control data to a predetermined storage element before the power supply of the video camera is removed,
Data can be prevented from disappearing.

Further, by evacuating the image data to a predetermined storage element before the power supply of the video camera is removed, it is possible to prevent the image data from disappearing.

Further, it is possible to avoid the problem that the zoom lens cannot operate when the power is turned on again.

Further, when the power is turned on again, it is possible to avoid the problem that the subsequent scene is not correctly connected to the previous scene.

Further, it is possible to prevent tape damage caused by suddenly removing the power supply while the tape tension is being applied.

Further, it becomes possible for the user to recognize a state in which it is systemically impossible to unlock the power supply.

[0103]

As described above, according to the present invention,
It is possible to prevent the power supply from being suddenly removed from the main body, and it is possible to avoid a problem caused by a sudden power loss.

[Brief description of the drawings]

FIG. 1 is a block diagram showing a configuration of a video camera according to a first embodiment.

FIG. 2 is a flowchart showing a control operation when power is removed according to the first embodiment;

FIG. 3 is a circuit block diagram showing a battery lock mechanism according to the first embodiment.

FIG. 4 is a block diagram showing a configuration of a video camera according to a second embodiment.

FIG. 5 is a flowchart illustrating a control operation when power is removed according to the second embodiment;

FIG. 6 is a circuit block diagram showing a battery lid locking mechanism according to a third embodiment.

FIG. 7 is a block diagram showing a configuration of a conventional video camera.

[Explanation of symbols]

Reference Signs List 101 camera (lens) 102 cassette tape 104 microcomputer (operation control means, lock release control means) 105 volatile memory 106 nonvolatile memory 107 power supply removal switch (operation means) 108 actuator (lock means, lock release means) 109 power supply 110 auxiliary Power supply

──────────────────────────────────────────────────の Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) H04N 5/765 H04N 5/907 B 5/907 5/782 K F term (Reference) 5C018 AB00 DA05 FA02 FB02 HA12 5C022 AA11 AB40 AB67 AC01 AC11 AC13 AC42 AC73 AC78 AC79 5C052 AA17 DD02 EE10 GA01 GA04 GB01 GE06 5H020 AS06 AS15 CC06 CC25 DD02 DD06 DD13 DD17 DD18

Claims (26)

[Claims] An electric device which is operated by a detachable power supply, wherein the operation control means controls an operation of the electric device main body, and a power supply mounted on the electric device main body cannot be detached from the electric device main body. Lock means for locking to a state, unlock means for releasing the locked state, operation means for performing an operation input when removing the power supply, and controlling the unlock means in response to the operation input A lock release control unit, wherein the operation control unit performs a predetermined evacuation control operation when the operation input is performed, and the lock release control unit is locked by the lock release unit after the evacuation control operation is completed. An electrical device characterized by canceling. 2. An electric device operated by a detachable power supply, comprising: an operation control means for controlling an operation of the electric device main body; a power supply chamber for accommodating the power supply; and a power supply opening of the power supply room. A lid, a lock unit for locking the lid in a state in which it cannot be opened and closed, a lock release unit for releasing the locked state, a lid open instruction member for inputting an operation when opening the lid, Lock release control means for controlling the lock release means in response to an operation input by the cover opening instruction member, wherein the operation control means performs a predetermined evacuation control operation when the operation input is received, An electric device wherein the lock release control means releases the state locked by the lock release means after completion. 3. The electric apparatus according to claim 1, wherein the operation control means and the lock release control means operate by the power of the mounted power supply. 4. The electric apparatus according to claim 1, wherein the unlocking means and the unlocking control means operate with power of a power supply different from the mounted power supply. 5. The electric device according to claim 1, wherein the predetermined evacuation control operation is an operation of storing control data used for operation control of the electric device main body in a predetermined storage element. 6. The electric apparatus according to claim 1, further comprising a warning unit that performs a warning operation when the lock release control unit cannot control the lock release unit. 7. A method for controlling an electric device operated by a detachable power supply, wherein an operation of the electric device main body is controlled by operation control means, and the electric device mounted on the electric device main body is locked by a lock means. Locked to a state in which it cannot be detached from the main body, unlocked the locked state by unlocking means, and unlocked by the unlocking control means in response to an operation input by an operating means for performing an operation input when removing the power supply. When the operation input is performed, the operation control unit performs a predetermined evacuation control operation, and after completion of the evacuation control operation, the lock release control unit changes the state locked by the lock release unit. A method for controlling an electric device, comprising: 8. A method for controlling an electric device operated by a detachable power supply, wherein the operation of the electric device main body is controlled by an operation control means, and a lid for opening and closing a power supply opening of a power supply room accommodating the power supply is provided. The lock is locked to a state that cannot be opened and closed, the locked state is unlocked by unlocking means, and the lock is unlocked in response to an operation input by an opening instruction member for inputting an operation when opening the lid. Means is controlled by unlock control means, and when the operation input is made, the operation control means performs a predetermined evacuation control operation, and after the evacuation control operation is completed, the unlock control means is locked by the unlock means. A method for controlling an electrical device, comprising: releasing a closed state. 9. The control method for an electric device according to claim 7, wherein the predetermined evacuation control operation is an operation of storing control data used for operation control of the electric device main body in a predetermined storage element. . 10. The control method for an electric device according to claim 7, wherein a warning operation is performed by the warning unit when the lock release control unit cannot control the lock release unit. . 11. A video camera operated by a detachable power supply, wherein the operation control means controls operation of the video camera main body, and a power supply attached to the video camera main body is not detachable from the video camera main body. Lock means for locking to a state, unlock means for releasing the locked state, operation means for performing an operation input when removing the power supply, and controlling the unlock means in response to the operation input A lock release control unit, wherein the operation control unit performs a predetermined evacuation control operation when the operation input is performed, and the lock release control unit is locked by the lock release unit after the evacuation control operation is completed. A video camera characterized in that it cancels. 12. The video camera according to claim 11, wherein the operation control means and the lock release control means operate by the power of the mounted power supply. 13. The video camera according to claim 11, wherein the unlocking means and the unlocking control means operate with power of a power supply different from the mounted power supply. 14. The video camera according to claim 11, wherein the predetermined evacuation control operation is an operation of storing control data used for operation control of the video camera body in a predetermined storage element. 15. A predetermined evacuation control operation is an operation of storing image data stored in a video camera main body in a predetermined storage element.
The video camera according to any of the above. 16. The video camera according to claim 11, wherein the predetermined retreat control operation is an operation for resetting a lens position. 17. The video camera according to claim 11, wherein the predetermined evacuation control operation is an operation of ending recording on a magnetic tape and an operation of aligning the magnetic tape. 18. The video camera according to claim 11, wherein the predetermined evacuation control operation is an operation for stopping the feeding of the magnetic tape. 19. The apparatus according to claim 11, further comprising warning means for performing a warning operation when the lock release control means cannot control the lock release means.
The video camera according to any of the above. 20. A method for controlling a video camera operated by a detachable power supply, wherein the operation of the video camera main body is controlled by operation control means, and the power supply mounted on the video camera main body is detached from the video camera main body. Locked to a disabled state by a lock unit, unlocked the locked state by an unlocking unit, and unlocked by the lock release control unit in response to an operation input by an operation unit for performing an operation input when removing the power supply. When the operation input is performed, the operation control unit performs a predetermined evacuation control operation, and after the evacuation control operation is completed, the lock release control unit changes the state locked by the lock release unit. A video camera control method characterized by canceling. 21. The video camera control method according to claim 20, wherein the predetermined evacuation control operation is an operation of storing control data used for operation control of the video camera body in a predetermined storage element. 22. The predetermined evacuation control operation is an operation of storing image data stored in a video camera body in a predetermined storage element.
The control method of the video camera described in the above. 23. The video camera control method according to claim 20, wherein the predetermined evacuation control operation is an operation of resetting the lens position. 24. The video camera control method according to claim 20, wherein the predetermined evacuation control operation includes an end of recording on a magnetic tape and an operation of aligning the magnetic tape. 25. The video camera control method according to claim 20, wherein the predetermined evacuation control operation is an operation for stopping the feeding of the magnetic tape. 26. The video camera control method according to claim 20, wherein a warning operation is performed by the warning means when the lock release control means cannot control the lock release means. .