JP2999937B2 - Control signal input device - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for externally inputting a control signal to a portable electronic device such as a video camera which operates by receiving power from a battery or an external AC adapter.

[0002]

2. Description of the Related Art Conventionally, in an electronic device such as a camera-integrated VTR, it is indispensable to confirm whether the device operates normally in a manufacturing process or a quality check process. Normally, this operation means confirming whether all operation modes such as recording, reproduction, fast-forward, and still reproduction are executed as instructed when the device is a camera-integrated VTR.

In performing this checking operation, if the electronic device has a remote control function, that is, if the device main body has a receiving unit for receiving a remote control signal for remote control, the receiving unit changes at regular intervals. A mode command signal for designating an operation mode is transmitted as a control signal for operation confirmation and input to a system controller (sys-controller) in the electronic device. The operation of the mode according to the control signal for operation confirmation is performed at regular intervals. It was possible to perform an efficient quality check by judging whether or not execution was performed sequentially.

However, in an electronic device having no remote control function, the operation confirmation control signal cannot be transmitted as a remote control signal. Instead, a dedicated input terminal for inputting the operation confirmation control signal to the electronic device body is used instead. It was necessary to provide.

[0005]

As described above, in order to input an operation confirmation control signal to an electronic device having no remote control function, a dedicated input terminal is provided, and this input terminal is further connected to a system controller in the electronic device. A connection device for electrical connection to the device is indispensable, which hinders an increase in the number of components and a reduction in space.

[0006]

According to the present invention, there is provided a system control unit for receiving a mode command signal and causing a device main body to execute various operation modes corresponding to the mode command signal, and a pair of first and second terminals. A battery terminal to which a positive terminal and a negative terminal of a battery can be connected, a third terminal connected to the first terminal, a grounded fourth terminal, and a contact position for contacting the fourth terminal. The AC adapter for converting an AC voltage into a DC voltage includes a third terminal and a third terminal. The fifth terminal includes a fifth terminal that can be selectively displaced to a separated position separated from the fourth terminal. The fourth terminal can be connected to each of the four terminals. When the output terminal is connected, the fifth terminal is in the separated position. When the output terminal is not connected, the fifth terminal is in the contact position and the jack is connected to the system control unit and the second terminal. Connection line and AC adapter The operation check control signal is input to the second terminal when the output terminal of the monitor is connected to the jack, and the operation check control signal is a plurality of mode command signals for causing the device body to sequentially execute a plurality of operation modes. It is characterized by the following.

[0007]

Since the present invention is constructed as described above, a dedicated input terminal is provided even if the electronic device does not have a remote control function, and this input terminal is electrically connected to a system controller in the electronic device. Connection means is not required.

[0008]

An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a main part circuit diagram of a camera-integrated VTR (device main body) capable of supplying power from either a battery or an external AC adapter. FIG.

In FIG. 1, reference numeral 1 denotes a battery terminal connectable to a power supply terminal on the battery side, and a first terminal 1a on the positive side.
And a pair of terminals of the second terminal 1b on the negative side.

Reference numeral 2 denotes a third, fourth, and fifth terminal 2a, 2b, 2c which can be connected to a power supply terminal of an external AC adapter.
The third terminal 2a is connected to the first terminal 1a of the battery terminal 1 and the fourth terminal 2a.
b is connected to the second terminal 1b and grounded,
The fifth terminal 2c is a movable piece, and always contacts the fourth terminal 2b when a plug is not inserted into the DC jack 2 from the outside. When the plug is inserted, the fifth terminal 2c is separated from the fourth terminal 2b and opened. State.

Reference numeral 3 designates various mechanisms of the camera-integrated VTR such as imaging, recording, reproduction, and fast-forwarding by issuing commands to various mechanisms, signal processing and servo circuits, motors, and other necessary parts. An input port P of the system microcomputer 3 is connected to a second terminal 1b of the battery terminal 1 via a connection line 4, and a control signal applied to the input port P is used for some operation. When the mode is instructed, the system microcomputer 3 controls the camera-integrated VTR so as to realize the corresponding operation mode.
Will be controlled.

The first terminal 1a and the third terminal 2a are connected to a power supply voltage line of the camera-integrated VTR, and a voltage applied to both terminals 1a and 2a is used as a power supply voltage of the main body of the apparatus. The connection line 4 is grounded via a resistor.

Next, the camera-integrated VTR is checked at the time of quality check in the manufacturing process of the camera-integrated VTR configured as described above.
A method for setting the TR to various operation modes will be described. At the time of this quality check, first, a plug from the AC adapter 6 is inserted into the DC jack 2 and connected, and the positive terminal 6a of the AC adapter 6 is connected to the third terminal 2a, and the negative terminal 6b is connected to the fourth terminal 2b. Then, the fifth terminal 2c is released from the contact state with the fourth terminal 2b, and becomes in the open state. Accordingly, the power supply voltage is applied from the AC adapter 6 to the power supply voltage line of the camera-integrated VTR, and the camera-integrated VTR is turned on. At this time, since the battery is not connected to the battery terminal 1, the second terminal 1b is in the open state in the same manner as the fifth terminal 2c is in the open state. That is, the second terminal 1b is opened as an unused terminal.

Therefore, when a control signal for operation confirmation is inputted to the second terminal 1b, a control signal for operation confirmation is applied to the input port P of the system microcomputer 3, and the system microcomputer 3 receives this signal. Decode and execute system control according to this signal. The operation confirmation control signal is formed by arranging at predetermined time intervals a plurality of mode command signals for commanding various operation modes that can be executed by the camera-integrated VTR. Specifically, first, the second terminal 1 b First, a REC command signal for instructing the recording mode is input, three minutes later, an FF command signal for instructing the fast-forward mode, and one minute later, a REW command signal for instructing the rewind mode,
Two minutes later, a PLAY command signal for instructing the reproduction mode is input, two minutes later, a still command signal for instructing the still reproduction mode is input, and finally, a stop instruction signal is input as an operation confirmation control signal.

The system microcomputer 3 receives the operation confirmation control signal, first issues a signal to the signal processing and servo circuit section, various mechanisms, a motor, and the like to operate the camera-integrated VTR in the recording mode for 3 minutes, thereby causing the system microcomputer 3 to operate in the recording mode. After a lapse of minutes, it is operated in the fast forward mode for one minute,
After that, it was operated in the rewind mode only for one minute,
Thereafter, the camera is operated in the reproduction mode for two minutes continuously, thereafter, operated in the still reproduction mode for two minutes, and finally the stop mode is set.

While the camera-integrated VTR performs various operations in accordance with the operation confirmation control signal in this manner, a person who performs a quality check determines whether or not the specified operation mode is being executed for a specified time. Check while watching the operation and the screen of the monitor connected to the camera-integrated VTR,
When it is confirmed that the operation mode according to the various command signals constituting the control signal is not executed, it can be determined that some abnormality has occurred in the corresponding device.

When the camera-integrated VTR is shipped and used by a user, and a battery is used as a power supply source, the form shown in FIG. 2 is used. That is, when the battery 5 is mounted on the camera-integrated VTR and the positive terminal 5a and the negative terminal 5b of the power supply terminal of the battery 5 are connected to the battery terminal 1, the power supply voltage from the battery 5 is reduced. Since the voltage is applied to the power supply voltage line and the plug is not connected to the DC jack 2, the fifth terminal 2c maintains the state of contact with the fourth terminal 2b, so the fourth terminal 2b is grounded. Will be. At this time, the input port P of the system microcomputer 3 is grounded,
The signal level is always at the L (low) level.

When the AC adapter 6 is used as a power supply, the circuit configuration is the same as that shown in FIG. 3, and both the second and fifth terminals 1b and 2c are open.
In this case, too, the signal level is always at the L level via the resistor coupled to the circuit.

When the input port is at the L level, the user operates an operation button such as a REC button or an FF button in response to a mode command signal input to another input port. The system control of the main body is executed.

[0020]

As described above, according to the present invention, a control signal for confirming operation can be input to the system control unit via a battery terminal for battery connection which is open when the AC adapter is connected, Even when the main unit does not have a remote control function, it is not necessary to provide a dedicated input terminal for inputting a control signal for confirming operation, which is effective in reducing the number of components and saving space.

[Brief description of the drawings]

FIG. 1 is a diagram illustrating a circuit configuration according to an embodiment of the present invention.

FIG. 2 is an explanatory diagram when a battery is connected according to an embodiment of the present invention.

FIG. 3 is an explanatory diagram when an AC adapter is connected according to an embodiment of the present invention.

[Explanation of symbols]

 Reference Signs List 3 system microcomputer 5 battery 1 battery terminal 1a first terminal 1b second terminal 6 AC adapter 2 DC jack 2a third terminal 2b fourth terminal 2c fifth terminal 4 connection line

Claims (1)

(57) [Claims] A system control unit that receives a mode command signal and causes a device main body to execute various operation modes corresponding to the mode command signal; and a pair of first and second terminals. A battery terminal to which a positive terminal and a negative terminal of a battery can be connected, respectively; a third terminal connected to the first terminal; and a fourth terminal grounded.
A terminal, a contact position for contacting the fourth terminal, and a fifth terminal that can be selectively displaced to a separated position separated from the fourth terminal, and an output terminal of an AC adapter for converting an AC voltage to a DC voltage. A positive terminal and a negative terminal can be connected to the third and fourth terminals, respectively. When the output terminal is connected, the fifth terminal is at the separated position. When the output terminal is not connected, the fifth terminal is connected. Comprises a jack at the contact position, and a connection line to which the system control unit and the second terminal are connected. When the output terminal of the AC adapter is connected to the jack, the second terminal is used to check operation. A control signal input device for receiving a control signal, wherein the operation confirmation control signal is a plurality of mode command signals for causing the device main body to sequentially execute a plurality of operation modes.