JP2571925B2 - Operation mode switching device for camera having data backup device - Google Patents

Description

Description: TECHNICAL FIELD The present invention relates to a camera having a data backup device for backing up camera status information, lens position information, and the like. The present invention relates to an operation mode switching device that sets strobe mode data and determines an operation mode of a camera.

BACKGROUND OF THE INVENTION Cameras have been developed that perform automatic focusing, automatic film winding, rewinding, automatic exposure adjustment, shutter release, and the like based on a series of operation sequences. In such a camera, when the main power of the camera is turned on, the camera needs to be operated next based on the state at the time of the end of the previous operation. Alternatively, it is desirable that even if the operation is started from a step completely unrelated to the state at the end of the previous operation, it is guaranteed that no trouble will occur in the operation of the camera.

The present inventors have already proposed a camera having a data backup device that can save state information data of the operation state of a previously used camera in a data back in a camera or the like capable of performing automatic focus adjustment or the like. (Japanese Patent Application No. 61-261051).

(Problems to be Solved by the Invention) In the camera as described above, it is necessary to set the photographer whether to take one frame or continuous shooting, use a self-timer, use a strobe, and the like. In addition, it is necessary to display whether the mode is set. Such data must be handled in the same manner as the data.

An object of the present invention is to set data of a photographing mode and a strobe mode in a memory backed up by a data back device provided on a back cover or the like so that the mode is externally displayed and a main switch or a main power supply is set. It is an object of the present invention to provide a camera operation mode switching device having a data backup device capable of determining the operation mode of the camera while retaining the data content even when one of the two is cut off.

(Means for Solving the Problems) In order to achieve the above object, an operation mode switching device for a camera having a data backup device according to the present invention comprises a data bag for recording date and time of photographing on a film and a power supply for the data bag. However, in a camera having a data backup device provided separately from a circuit and a power supply on the camera body side, a shooting mode changeover switch provided on the data back side and a shooting mode signal from the shooting mode changeover switch are stored. A backup memory, and an external display unit for displaying a shooting mode corresponding to a mode signal from the shooting mode changeover switch, and configured to transfer the shooting mode signal from the backup memory to a camera body side memory. I have.

Here, the shooting mode can be a single mode, a continue mode, a self mode, or a self continue mode.

Further, as another configuration, in a camera having a data backup device in which a data back for recording shooting date and time on a film and a power supply for the data back are provided separately from a circuit on the camera body side and a power supply, A strobe mode changeover switch provided on the side, a backup memory for storing a strobe mode signal from the strobe mode changeover switch, and an external display for displaying a strobe mode corresponding to the mode signal from the strobe mode changeover switch. The strobe mode signal may be transferred from the backup memory to the camera body side memory.

Here, the strobe mode can be an auto strobe mode, a strobe off mode, or a slow tuning mode.

(Example) Hereinafter, the present invention will be described in more detail with reference to the drawings and the like.

FIG. 1 is a block diagram showing an embodiment of a circuit of an operation mode switching device of a camera having a data backup device according to the present invention.

In the camera to which this embodiment is applied, a main circuit is provided on the camera body side, and a data back (a circuit having a clock circuit and capable of imprinting a date or the like) is provided on the back cover. Is provided. The main circuits on the camera body side are an automatic exposure control (AE) module 3, an automatic focus adjustment (AF) module 4, a shutter and aperture (TF) drive circuit 5, a sequence control and arithmetic CPU (main CPU).
6. Motor drive circuit 8.

These circuits are supplied with operating current from a main power supply 1 on the camera body side via a DC / DC converter 2.

The automatic exposure control module 3 inputs the brightness information of the subject and the sensitivity of the film stored in the camera to the sequence control and calculation CPU 6 to calculate data required for the automatic exposure control.

The shutter and aperture drive circuit 5 drives the shutter and aperture based on the sequence control and the operation value obtained by the operation CPU 6.

The automatic focus adjustment module 4 inputs information on the distance to the subject to the sequence control and calculation CPU 6 to calculate data necessary for the automatic focus control.

The motor drive circuit 8 drives the focus adjusting lens driving motor 10 based on the data to adjust the focus.

The motor 9 and the motor 11 are respectively wound up with a film,
A rewind motor and a zoom lens drive motor.

The sequence control and calculation CPU 6 includes a memory 7 that performs the above-described various calculations and controls and stores data indicating the current state of the camera.

The data includes lens information (AF or zoom position), film (winding, rewinding, automatic loading) status, and the like.

A main power switch 15, a main power presence / absence confirmation switch 16, and a rewind switch 17 are further provided on the camera body side.

A data back circuit 20 is provided on the back cover side of the camera. This circuit includes a backup memory 22 and a transistor 21 as a normal data back circuit in addition to a clock circuit and the like.
It is included.

The base of the transistor 23 is connected to the output of the data back circuit 20, and the collector of the transistor 23 is connected to the main power supply 1 on the camera body via a data imprint lamp 24.

Data imprinting driven by the data back circuit 20
The contents of the LCD 30 are recorded on the film by being illuminated by the data imprint lamp 24.

The positive electrode of the data-back battery 25 supplies an operating current to the data-back circuit 20 via the diode 19.

The diodes 18 and 19 are for a case where the data back battery 25 is set to 3 V and the voltage of the main power supply 1 is set to 6 V. The diodes 18 and 19 also supply the data back circuit 30 from the main power supply 1 and This is for suppressing the power loss of the battery 25 and matching the voltage of the data transfer bus 26.

The data back circuit 20 confirms that the main power switch 15 has been turned on, and turns on the transistor 21.

As a result, the output terminal PH of the data back circuit 20 becomes low, and the sequence control and calculation CPU 6, the automatic exposure control module 3, the automatic focus adjustment module 4, etc. of the circuit on the camera body side are connected to the main power supply 1 and Receive supply.

FIG. 2 is a diagram showing an external display unit used in an operation mode switching device of a camera having a data backup device according to the present invention, and FIG. Figure to do, 4th
FIG. 5 is a diagram showing the relationship between processing and display of a flag for switching the photographing mode of the embodiment apparatus, and FIG. 5 is a diagram showing the relationship between the flag for switching the flash mode of the embodiment apparatus and the processing and display. FIG.

As shown in FIG. 2, the external display LCD 31 includes a single mode mark 32, a continuity mode mark 33, a self mode mark 34, an auto strobe mode mark 35,
The F mode mark 36 can be displayed.

The data back circuit 20 has a date setting switch 27, a shooting mode switch 28, and a strobe mode switch.
29 are provided, each of which is connected to the input terminals ₇ and ₈ .

As a module constituting the backup memory 20, a 3-byte register for storing the status of the camera is used.
B ₁ .about.B ₃ are prepared, in the register B ₁ flag D0~D4
Correspond to the terminals ₃ , ₇ , _{8 as shown} in FIG.

Register B ₁ by pressing the shooting mode switch 28
The flags D1 and D0 are incremented and change as shown in FIG. In response to this change, the display mark of the external display unit 31 also changes as shown in the right column of FIG.

Here, the single mode refers to a mode for taking one frame, the continuous mode refers to a mode for continuous shooting, the self mode refers to a mode for taking one frame self-timer, and the self-continue mode. This mode refers to continuous self-timer shooting.

By pressing the flash mode switch 29, the flag D3, D2 of the register B ₁ is incremented, varies as shown in Figure 5. In response to this change, the external display unit 31
Also changes as shown in the right column of FIG.

Here, the auto flash mode is a mode in which the aperture value is automatically determined according to the distance to perform shooting, the flash off mode is a mode in which flash shooting is stopped and automatic exposure is performed, and the slow synchronization mode is In this mode, the aperture value is automatically determined and the automatic exposure adjustment is further performed.

FIG. 6 is a flow chart for explaining the operation of a main CPU used in an embodiment of a camera operation mode switching device having a data backup device according to the present invention, and FIG. 7 is a data backup device side of the embodiment. FIG. 8 is a flowchart for explaining the transfer of data between the main unit and the data backup device.

Next, the operation of the camera of the present invention on the main CPU side will be described in the sixth.
Description will be made with reference to the drawings.

When a voltage is supplied from the main power supply 1, the sequence control and arithmetic CPU 6 performs a reset start (100), initializes an I / O interface, a RAM and the like (101),
Battery check (102), automatic exposure control module 3
The DX code is read into (103).

Next, the data of the backup memory 22 in the data back circuit 20 (camera status information, lens and lens barrel position information, etc.) is taken into the memory 7 through the data transfer bus 26 (104).

Then, the contents of the memory 7 of the sequence control and operation CPU 6 are restored to the contents indicating the same state as when the main power switch 15 was turned off last time (105).

At this time, if there is an idle feed signal after loading the film (10
6) The idle feeding process is performed (107), and if there is a rewind signal to take out the film (108), the rewinding process is performed (1).
09).

When there is no signal (106, 107), it is checked whether the main switch 15 is on (110), and when it is off,
The lens is initialized to the closest position (111), the current backup data is set (112), the backup data is written to the backup memory 22 in the data back circuit 20 (113), and power-off processing is performed (114). End the operation.

When the main switch 15 is on (115), a mode check such as a shooting mode and a strobe mode is performed (11).
6) Perform photometric calculation (117).

As a result of checking the strobe mode, if the strobe mode is the auto strobe mode or the slow tuning mode (FIG. 5), and it is determined that strobe is necessary (118), a charging process is performed (119), and the strobe is turned off. When a strobe is unnecessary in the mode (118), the following distance measurement calculation is performed (120), and AF lens control is performed (121). In this state, if the relays switch is off, step 108
When it is turned on (122), if the result of the photographing mode check is a serif mode and a self-continue mode (FIG. 4) (123), a self-timer process is performed (124), and a single mode and a continuous mode are performed. In the case of the new mode, the shutter control (125) and the winding operation (126) are performed to end the photographing, and the process returns to step.

Next, the operation of the data back circuit 20 will be described mainly with reference to FIG.

Perform a reset start (200), and initialize the I / O interface, RAM, etc. (201).

It is determined whether the main switch 15, the check switch 16, and the rewind switch 17 are on / off (202, 203, 204). When the switch 15 is on and the switch 16 or 17 is on, a power-on process is performed (205).

If there is access from the main CPU 6 (206) and backup data is output (107), the data is transferred to the main CPU 6 (208). Further, if backup data is input (209), data from the main CPU 6 is read (210).

In response to the PH off command (211), PH off command processing is performed (212).

In response to a signal from the photographing mode switch 28 (213), the photographing mode (FIG. 4) is set in the backup data memory 22, and a display corresponding to the external display LCD 31 is performed (214).

According to the signal from the flash mode switch 29 (21
5) The flash mode (FIG. 5) is set in the backup data memory 22, and a display corresponding to the external display LCD 31 is performed (214).

FIG. 8 shows an example of a serial interface between the camera body and the data imprinting device. The backup data B _{1 to} B ₃ exchange data between the main CPU 6 on the camera body side and the data imprinting device through the serial interface line.

In FIG. 8, ₁ indicates that transfer is possible or impossible,
▲ ▼ indicates access from the main CPU 6 to the data imprinting device, ▲ ▼ indicates the serial transfer clock, Is written from the main CPU 6 to the data imprinting device, Indicates reading of the main CPU 6 from the data imprinting apparatus.

Main CPU6 check the status of D ₁ from the transfer possible, as "L" to CE, in accordance with the serial transfer clock, input and output data.

In the present invention, the main switch 15 is turned off and the main power supply 1 is turned off.
The data content is held in the backup data memory 22 of the data back circuit 20 even when the data has expired.

Even when the main switch 15 is on and the main power supply 1 is off, data is retained and can be changed, resulting in a power saving design.

Note that the self-operation and the like can be set to a single shooting mode, an auto strobe mode, or the like by changing the content of the backup data from the main CPU after a series of operations.

(Effects of the Invention) As described in detail above, according to the present invention, since the data in the photographing mode and the strobe mode is held by the power source for data back, even if the main power is turned off, the next camera Since the operation from the start is performed by the data, it is possible to restart the operation reliably in a short time.

[Brief description of the drawings]

FIG. 1 is a block diagram showing an embodiment of a camera operation mode switching device having a data backup device according to the present invention. FIG. 2 is a diagram showing an external display unit used in an operation mode switching device of a camera having a data backup device according to the present invention, and FIG. FIG. 4 is a diagram showing the relationship between a flag for switching the photographing mode of the embodiment and the processing and display, and FIG. 5 is a flag for switching the strobe mode of the embodiment. FIG. 6 is a diagram showing the relationship between the processing and display. FIG. 6 is a flow chart for explaining the operation of a main CPU used in an embodiment of a camera operation mode switching device having a data backup device according to the present invention, and FIG. 7 is a data backup device side of the embodiment. FIG. 8 is a flowchart for explaining the transfer of data between the main unit and the data backup device. DESCRIPTION OF SYMBOLS 1 ... Main power supply 2 ... DC / DC converter 3 ... Automatic exposure control module 4 ... Automatic focus adjustment module 5 ... Shutter and aperture drive circuit 6 ... Sequence control and calculation CPU 7 ... Memory in CPU 8 ... … Motor drive circuit 9… Motor for film winding and rewinding 10… Motor for driving lens for focusing 11… Motor for driving zoom lens 12 to 14… Diode 15… Main power switch 16… Check switch 17… … Rewind switch 18,19… Diode 20… Data back circuit 21… Transistor 22… Backup memory 23… Transistor 24… Data imprinting lamp 25… Data back battery 26… Data bus 27… Date setting switch 28… Shooting mode switch 29… Flash mode switch 30… Data imprinting LCD 31… External display LCD

Continuing from the front page (72) Inventor Koichi Kawakami 2800 Nagachi, Okaya-shi Kyocera Corporation Cho Nokagaya Plant No. (72) Inventor Noriaki Murai 2800 Nagaya Okaya-shi Choka Nokaya Plant Nogaya Plant

Claims (4)

(57) [Claims] 1. A camera having a data back-up device provided separately from a circuit on the camera body side and a power supply, wherein a data back for recording a photographing date and time and the like on a film and a power supply for the data back are provided on the data back side. A provided shooting mode changeover switch, a backup memory for storing a shooting mode signal from the shooting mode changeover switch, and an external display unit for displaying a shooting mode corresponding to the mode signal from the shooting mode changeover switch are provided.
An operation mode switching device for a camera having a data backup device, wherein the photographing mode signal is transferred from the backup memory to a camera body side memory. 2. The operation mode switching device for a camera having a data backup device according to claim 1, wherein said photographing modes are a single mode, a continuation mode, a self mode, and a self continuation mode. 3. In a camera having a data back-up device provided separately from a circuit on the camera body side and a power supply, a data back for recording a photographing date and time and the like on a film is provided on the data back side. A flash mode switch provided, a backup memory for storing a flash mode signal from the flash mode switch, and an external display unit for displaying a flash mode corresponding to the mode signal from the flash mode switch, An operation mode switching device for a camera having a data backup device, wherein the strobe mode signal is transferred from the backup memory to a camera body side memory. 4. An operation mode switching device for a camera having a data backup device according to claim 3, wherein said strobe mode is an auto strobe mode, a strobe off mode, or a slow tuning mode.