JP2002122935A - Signal input/output controller for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera having plural camera interlocking modes any one of which can be selected. SOLUTION: The camera where two cameras are electrically connected and interlocked is constituted of a setting means selectively setting any one of the plural interlocking modes concerning a way to interlock them and a performing means performing specified interlocking operation in accordance with the mode set by the setting means.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera signal input / output control device for performing an interlocking operation by electrically connecting the cameras.

[0002]

2. Description of the Related Art Conventionally, the same subject is often photographed using two cameras. The purpose is to simultaneously shoot photographs with the same subject but with different focal lengths of the photographing lens, or to photograph two identical photographs at a time to eliminate the risk of failure. However, in order for the photographer to do that, attach a cable release or the like to each of the two cameras,
It is necessary to press the release button of the cable release with both hands at the same time, and both hands will be blocked,
There was a problem that timings did not always match exactly.

In recent years, it has been proposed that two cameras be electrically connected to each other so that the release of the cameras can be linked by an electric signal. Specifically, in a camera having an electric hoist function, for each camera,
A terminal for inputting a signal for starting the release from the outside,
Provided as one terminal that also serves as a terminal that outputs to the outside in conjunction with its own release operation, the camera whose release button is operated on the camera body releases the terminal from the terminal in conjunction with its own release operation Output a signal,
A camera which has input a release signal from the outside via the terminal without operating its own release button starts a release operation. Then, the two cameras can be electrically connected by a cable or the like, and the two cameras can perform the release operation in conjunction with each other simply by pressing one of the release buttons.

[0004]

By interlocking two cameras by exchanging electrical signals, the method of interlocking is not limited to simultaneous shooting as in the conventional manual operation. Various interlocking methods are conceivable. For example, even in the same simultaneous shooting, an interlocking mode (hereinafter, this mode is referred to as an “asynchronous interlocking mode”) in which the states of pressing the release button are simultaneously interlocked, and an interlocking mode (hereinafter, referred to as an The mode is referred to as “simultaneous interlocking mode”). These two differences become remarkable when a mode in which a release operation is started for the first time after the focus is achieved even when a release button is pressed in a recent AF camera is selected. That is, in the asynchronous interlocking mode, the signals for requesting the release of the two cameras are only synchronized. As a result, the timing at which the release operation is started is not necessarily simultaneous. After waiting for timing when both cameras can enter the release operation, the release operation is actually performed simultaneously.

In order to cover the limit of the frame speed of continuous shooting with one camera, an interlocking mode in which two cameras are interlocked so as to be alternately released (hereinafter, this mode is referred to as an "alternating interlocking mode") ) Is conceivable. Also, there may be a request for a mode in which the two cameras remain connected by a cable and operate independently of each other only at certain times without interlocking (hereinafter, this mode is referred to as “non-interlocking mode”).

SUMMARY OF THE INVENTION An object of the present invention is to propose a camera having a plurality of camera interlocking modes and any one of which can be selected.

[0007]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the present invention relates to a camera for electrically connecting two cameras and interlocking the two cameras. A setting means for selectively setting any one mode; and an execution means for executing an interlocking operation in accordance with the mode set by the setting means.

[0008]

In the present invention, the camera is provided with a plurality of interlocking modes and the mode setting means for selecting one of the interlocking modes is provided, so that different interlocking functions can be easily set in one camera. The mobility of linked shooting when two cameras are connected is improved.

[0009]

FIG. 2, FIG. 3, and FIG. 4 are block diagrams showing a specific configuration of an electric circuit according to an embodiment of the present invention. 2 to 4, reference numeral 100 denotes the same camera body which forms the core of the present invention. 2 in FIG. 2 is another camera body, 300 in FIG. 3 is a timer release device connectable to the camera, 500 is a connection cable connecting the cameras 100 and 200, and 400 in FIG. Mode selection device.

First, the internal configuration of the camera 100 will be described. The connector 111 has 9 terminals, BAT is a terminal for outputting primary power from the camera battery 103 via the diode D101, and VCC is a secondary power from the output voltage of the DC-DC converter 102 via the diode D102. Terminal. WUP is the input port P1 of the microcomputer 101
1, and is connected from the output port P01 to the collector of the transistor Q101 via a resistor.
The RLS is directly connected to the input port P12 of the microcomputer 101, and is connected from the output port P02 to the collector of the transistor Q102 via a resistor. BUSY is directly connected to the input port P13 of the microcomputer 101, and is connected from the output port P03 to the collector of the transistor Q103 via a resistor. RX is connected to the serial input terminal RXD of the microcomputer 101, and TX is connected to the serial output terminal TXD. SGND is a signal ground terminal, and PGND is a large current ground terminal. The DC-DC converter 102 inputs the battery 103 as a primary power supply to an IN terminal, and selectively outputs a secondary power supply from an output terminal OUT according to an input level of a CTL terminal connected to an output port P04 of the microcomputer 101. . A power supply terminal VDD of the microcomputer 101 is connected to power supplies from a battery and a secondary power supply via diodes D103 and D104, respectively. SW101 and SW102 are two-stage push switches that switch in conjunction with the release button of the camera body. SW101 is a power start switch that turns from off to on when the button is pressed halfway, and SW102 is a release switch that turns from off to on when fully pressed. Switch. L
Reference numerals 101 and L102 denote magnets that hold the first and second curtains of the shutter, respectively, and 104 denotes an interface circuit that amplifies signals from the output ports P05 and P06 of the microcomputer 101 to magnet currents. Reference numeral 106 denotes a motor for driving a mechanism for a release operation, and reference numeral 105 denotes an interface circuit for amplifying signals from the output ports P07 and P08 of the microcomputer 101 to a current flowing through the motor.

FIG. 3 shows an example in which a timer release device 300 is connected to the camera 100 described above via a connector 111. In the timer release device 300, five of nine terminals on the camera side are connected, and TBAT, TVCC,
WUP, TRLS, TGND are the camera terminals BAT, VCC, WU respectively.
Corresponds to P, RLS, SGND. The timer circuit 301 has a terminal TB
AT and TVCC are supplied from a power supply connected in parallel,
From the terminal SW, and outputs a signal of L level for a predetermined time from the terminal OUT from that time.
The terminal OUT is directly connected to the terminal TRLS connected to the camera, and serves as a release request signal for the camera.
SW301 is a power supply start switch for the camera which is directly output to the terminal TWUP, and SW301 and SW302.
Is a two-stage push switch operated by one button.

The operation when the camera 100 and the timer release device 300 are combined in FIG. 3 will be described with reference to FIGS.
13 will be described with reference to the flowchart of the microcomputer 101 of the camera 100 shown in FIG. First, the flowchart of FIG. 11 will be described. In the flow of FIG. 11, the program is started when the battery 103 is loaded into the camera 100, and at step # 101, the level of the input port P15, that is, whether the power switch SW101 is on or not is determined.
In step # 102, it is determined whether or not the level of the input port P11, that is, the terminal WUP of the connector 111 is L. If at least one of them is L, in step # 103, the output port P04, that is, the CTL terminal of the DC-DC converter is connected. L to activate the secondary power supply of the DC-DC converter. Subsequently, in step # 104, the timer TPH inside the microcomputer is reset to zero. This timer TPH is a timer for measuring the time for holding the power. In this case, since a request for starting or extending the power is issued from the power start switch or the terminal WUP, the timer for holding the power is reset. Next, in step # 105, it is determined whether or not the level of the input port P14, that is, whether or not the release switch is turned on.
In step 07, the flag $ MST is set, and if it is H (off), the flag $ MST is cleared in step # 106. This flag is a flag for temporarily storing that the release switch is turned on by operating the release button of the camera 100 and a release request is issued. The release request to the camera 100 includes the time when the release switch is turned on by operating the release button of the main body, and the time when the connector 111 is pressed.
There are two cases when the L level is input from the terminal RLS of the above. Depending on which factor triggered the release operation, the former case is called a "master state" and the latter case is called a "slave state". Distinguish between states. The flag #MST is a flag for immediately determining whether the release operation is in the master state or the slave state when the release is actually started. After setting the flag $ MST in step # 107, the level of the input port P13, that is, the terminal BUSY, is set in step # 108.
Input level is determined. The input signal from terminal BUSY
This signal indicates that release is prohibited in the master state. When the signal is at H level, it is permitted, and when it is at L level, it is prohibited. Therefore, when the terminal BUSY is at H level in step # 11
0, and when the terminal BUSY is at the L level, step # 112
Fly to and release start is postponed. Meanwhile, step #
If the release switch is off at 105, after step # 106, the input port P12,
That is, the level of the terminal RLS of the connector 111 is determined,
In the case of L, the process proceeds to step # 110, which is the same as when the release switch is turned on in step # 105. In step # 110, it is determined whether or not a focus adjustment unit (not shown) has led the camera to a focused state. If out of focus, the process proceeds to step # 112.
At 1 the release subroutine is executed and the actual release operation is started. The release subroutine will be described later.
Thereafter, in step # 111, it is determined whether or not the timer TPH for holding power has reached 8 seconds. If 8 seconds have elapsed, the output port P04 is set to H in step # 112, and the DC-D
Cut off the output of the secondary power supply of the C converter. Thereafter, the flow returns to step # 101 to form a loop.

When the photographer half-presses the release button of the timer release device 300, the SW 301 is turned on and the L level is output to the terminal TWUP, and the terminal WUP is set to L on the camera side. P11
to go into. The microcomputer 101 of the camera 100 activates the secondary power supply of the DC-DC converter and resets the power supply holding timer, as described in the flow of FIG.
Next, when the photographer fully presses the release button of the timer release device 300, the switch 302 is turned on and the input IN of the timer circuit 301 becomes L. Then, the timer circuit 301 immediately sets the output OUT to L, starts counting the time set by the time setting means (not shown), and holds L of the output OUT until the time ends. In other words, this timer release device is an accessory mainly for automatically performing the bulb shooting of the camera for the set time only by performing the starting operation. The power of the timer circuit 301 is supplied from the connection between the terminals TBAT and TVCC.
00 is not active, so power is supplied from the terminal BAT side.
Since the next power supply becomes active, power is supplied from the higher voltage of the terminal VCC and the terminal BAT. In the timer release device 300, the power supply terminals TBAT and TVCC can be directly connected because the power supply output terminal BAT on the camera 100 side
Diode D1 between each VCC and its power supply
This is because 01 and D102 are put in series. During the period when the output OUT of the timer circuit 301 is L, L is input from the terminal RLS of the connector 111 of the camera 100 via the terminal TRLS, so that a release request is made as shown in the flow of FIG.

Next, the operation in the connection example of FIG. 4 will be described. Reference numeral 400 in FIG. 4 denotes a mode selection device, and terminals connected to the camera correspond to EGND and RX with respect to SGND on the camera side.
ERX corresponding to ETX and TX. Terminal ETX is microcomputer 4
01 is connected to the serial output port TXD, and the terminal ERX is connected to the serial input port RXD. Microcomputer 401
Switches SW401, SW402, and SW403
Are connected to the input ports P41, P42, P43, respectively. SW
402 and SW403 are mode selection switches.
Reference numeral 401 denotes a transfer start switch. When the SW 401 is turned on, the 2-bit 0/1 state of the SW 402 and SW 403 is sent to the microcomputer 101 of the camera by serial data transfer from the terminal ETX via the terminal RX. When receiving the 1-byte data, the microcomputer 101 of the camera returns predetermined confirmation signal data from the terminal TX to the microcomputer 401 of the mode selection device via the terminal ERX. FIG. 5 shows the camera 1
7 is a bitmap showing storage bits of selected mode information in the microcomputer 101 of the 00. In the RAM having the address name “MODE”, the state of the SW 402 is stored in the flag name “MOD0” in bit 0, and the state of the SW 403 is stored in the flag name “MOD1” in bit 1. The relationship between the state of these two bits and the selection mode is defined as '00' as an asynchronous interlock mode, '01' as a simultaneous interlock mode, '10' as an alternate interlock mode, and '11' as a non-interlock mode.

Next, the operation in the case of the connection between cameras, which is the connection example of FIG. 2, will be described. The camera 200 is the camera 10
It is a camera of exactly the same kind as 0, and its internal configuration is also exactly the same. Reference numeral 500 denotes a cable for connecting the respective connectors 111 and 211 of the camera 100 and the camera 200, and the terminals of the connector 111 and the corresponding terminals of the connector 211 are directly connected. However, connector 1
The RX terminal 11 is connected to the TX terminal of the connector 211, and the TX terminal of the connector 111 is connected to the RX terminal of the connector 211.

In order to explain the interlocking operation between the cameras in the connection example of FIG. 2, the flowcharts of FIGS. 12 and 13 will be described first. This flow is based on the microcomputer 1 of the camera 100.
01 and the microcomputer 201 of the camera 200. FIG. 12 is a flowchart of a timer interrupt routine in which the microcomputer 101 or 201 always enters at a short period of time (for example, 1 ms) during operation. In step # 201, the selected mode storage data, MODE = 3 (11 in binary) )
Is determined, if no, the level of the input port P15 is determined in step # 202. If L, that is, if the power start switch is turned on by operating the release button of the camera, the output port P01 is set to H. I do. Then
The transistor Q101 turns on, and L is output from the terminal WUP. However, when MODE # 3 in step # 201 and when P15 is H in step # 202, the output port P01 is kept at L, so that the transistor Q101 remains off and the terminal WUP also remains open. . This operation is synchronized with the operation of the power switch on the camera body, except when the unlinked mode is set.
Outputs a power activation signal from P to the outside.
Subsequently, it is determined whether or not MODE = 0 in step # 205, and if no, the process immediately returns. Step # 20
If MODE = 0 is 0, the level of the input port is determined in step # 206. If the level is L, that is, if the release switch is turned on by operating the release button of the camera, the output port P02 is set to H in step # 209. The transistor Q102 is turned on, and the terminal LLS
Is output. If the release switch is off at step # 206, the output port P02 goes low at step # 208.
And the terminal RLS also remains open. This operation means that a release signal is output from the terminal RLS to the outside in synchronization with the operation of the release switch of the camera body only when the asynchronous interlocking is set. FIG. 8 is a timing chart showing the operation, showing the release operation in the asynchronous interlocking mode.
2, that is, when the release switch on the main unit is turned on
The output of the RLS terminal changes from open to L, whereby continuous shooting for two frames is performed from point b to point n. When the release switch turns off at the point p in the middle of the second frame, the RLS terminal output also returns to open. On the other hand, FIG. 7 shows a release operation in a case other than the asynchronous interlocking mode, for example, in a non-interlocking mode, and the SW 102, that is, the release switch is turned on at a point a in FIG. , RLS pin output remains open.

FIG. 13 is a flow chart showing the contents of the release subroutine in FIG. First, step # 30
Flag 1 to see if it is in master state at 1
The MST is discriminated, and when this is 0, that is, in the slave state, the output port P03 is set to H in step # 302. This turns on the transistor Q103, and outputs L from the terminal BUSY to the outside. In the timing chart of FIG. 6 showing the release operation in the slave state, this corresponds to a portion where the BUSY terminal output changes from open to L at the time of the start of the release operation at the point b. It will be a signal that it is inside. In step # 301, if MST = 1, that is, in the master state, it is determined in step # 303 whether MODE = 1, that is, whether the simultaneous interlocking mode is set. If yes, the flag is set in step # 304. MR
Set S. The flag #MRS is a flag for temporarily storing that the release of the master state has been started in the simultaneous interlocking mode. At the same time, in step # 305, the output port P02 is set to H, and L is output from the terminal RLS to the outside.
Referring to the timing chart of FIG. 9 showing the release operation in the simultaneous interlocking mode, at point a, the SW 102, that is, the release switch of the main body is turned on, but the timing when the release operation is actually started for focusing operation or the like. Is the point b, and at this time, L is output from the terminal RLS. Camera 2
00 receives the L input from the terminal RLS and starts the actual release operation at the point r. Since the release operation is in the slave state, the L is output from the terminal BUSY of the camera 200 at the same time. The input level of the terminal BUSY becomes L. In any case, next, in step # 306, the output ports P05 and P06 are operated so as to energize both the magnets L101 and L102 for holding the front curtain and the rear curtain. At the same time, in step # 307, the output ports P07 and P08 are operated so as to rotate the motor 106 in the normal rotation direction, and the operation of a mechanical unit (not shown) for mirror up is started. Subsequently, in step # 308, the timer TMD is reset to zero. The timer TMD is a timer for measuring the time from the start of the release operation. Next, in step # 309, the flag $ MRS is determined. If this flag is 1, that is, if the release operation is performed in the simultaneous interlocking mode, in step # 310, the control waits for the timer TMD to reach 50 ms. Set port P02 to L
(Point p in FIG. 9). This is because the output from the terminal RLS is set to 50 from the start of the release operation only in the simultaneous interlock mode.
This indicates L for ms (tRS in FIG. 9). After that, or when the flag $ MRS is 0 in step # 309, it waits for the timer TMD to reach 70 ms in step # 312, and when it reaches the value, the motor 1 is turned off in step # 313.
06 is stopped (point c in FIGS. 6 to 10). Next, in step # 314, the energization of the magnet L101 is released so that the front curtain of the shutter runs (point d in FIGS. 6 to 10).
From that point, in step # 315, after waiting for the shutter time set by means (not shown),
At 316, the energization of the magnet L102 is released so that the rear curtain of the shutter runs (point e in FIGS. 6 to 10). The shutter control is completed as described above. In step # 317, the timer TMD is set to 0 in order to measure the time from that point.
Reset to. Then, in step # 318, the motor 10
6 is reversed (point f in FIGS. 6 to 10) to start the mirror down and shutter charge operation. Then, step #
At step 319, the flag $ MST is determined. If this flag is 0, that is, if the release is in the slave state, step # 32 is executed.
The process jumps to step 5, and in the case of 1, that is, the release in the master state, the process proceeds to step # 320. Step # 320
Then, it is determined whether or not MODE = 2. In the case of no, that is, in the case of not the alternating interlocking mode, the process also jumps to step # 325. , And when it reaches output port P0 in step # 322.
2 is set to H, and the L level is output from the terminal RLS (see FIG. 1).
P point of 0). Then, in step # 323, wait for the timer TMD to reach 140 ms.
At 24, the output port P02 is returned to L, and the output of the terminal RLS is returned to open (point v in FIG. 10). Step # 320 ~
The operation of step # 324 is performed only in the case of the release operation in the alternate interlocking mode and the master state, after 90 ms (tDRA in FIG. 10) after shutter control, and 50 ms (tDRA in FIG. 10).
RA), L is output from the terminal RLS.
In FIG. 10, as a result, since the input level of the terminal RLS of the camera 200 becomes L, the camera 200 starts the release operation in the slave state (point r in FIG. 10).
The release operation start point of the camera 200 is approximately at the midpoint between the point b which is the start point of 00 and the point h which is the start point of the second frame. Since the camera 200 is in the release operation in the slave state, L is output from the terminal BUSY, whereby the input of the terminal BUSY of the camera 100 becomes L level from the point r.

In any case, in step # 325, the motor 106 is stopped in step # 326 after the timer TMD reaches 230 ms (FIGS. 6 to 1).
(G point of 0), the mirror down and the shutter charge operation are terminated. In step # 327, the output port P03 is set to L, and even if L is output from the terminal BUSY, it is returned to the open state (s of the camera 200 in FIGS. 9 and 10).
Point), the end of the release sequence is notified to the partner camera in the master state. In step # 328, the uniform flag ＄ MRS is cleared, and at that time, the storage of the release operation in the simultaneous interlock mode and the master state is canceled, and the process returns.

Here, the points will be arranged again along the timing charts of FIGS. 6 to 10. FIG.
Is a timing chart when the release operation is performed in the slave state, and the input of the terminal RLS becomes L (point a).
As a result, mirror up from point b to point c, shutter control from point d to point e, mirror down from point f to point g, and shutter charge are performed. Since the level of the terminal RLS is still L at that point, h
The release operation of the next frame is continuously performed from the point to the point n. From the point b to the point g and from the point h to the point n, the level L of the terminal BUSY indicating the release sequence in the slave state is output.

FIG. 7 is a timing chart when the master 100 is released when the camera 100 is set to the non-interlocking mode. When SW 102, that is, the release switch is turned on (point a) by operating the release button of the camera 100, the release operation of two frames is performed from point b to point g and from point h to point n as in FIG. However, since it is in the master state, the output of the terminal BUSY remains open.

FIG. 8 is a timing chart when the master 100 is released when the camera 100 is set in the asynchronous interlocking mode. During the period from point a to point p, while the release switch is turned on by the operation of the release button of the camera 100, the terminal RL
L level is output from S. When the release switch is turned on, two frames of the release operation are also performed, but the output of the terminal RLS outputs the state of the release switch as it is regardless of the sequence.

FIG. 9 is a timing chart showing a case where the master 100 is released when the camera 100 is set in the simultaneous interlocking mode, and the connected camera 200 is released in the slave status. Camera 10
0 means that when the release switch is turned on from point a, the release operation is actually started from point b and the terminal RLS
Is output during the period from tRS to tRS. Thereby, the camera 20
0 starts the release operation in the slave state from the point r and outputs L from the terminal BUSY. In the case of FIG. 9, a longer shutter time is set for the camera 200,
Although the release sequence of the camera 100 has been completed at the point g, the release sequence of the camera 200 has been completed up to the s point. Immediately after point g, the camera 100 keeps its release switch on, but the terminal BU
Since the input level of SY is L, it waits until the level of the terminal BUSY becomes H in anticipation of entering the release operation. The release sequence of the camera 200 ends at the point s, and the input level of the terminal BUSY of the camera 100 becomes H
After that, the release operation of the second frame from the point h is started.

FIG. 10 is a timing chart showing a case where the master 100 is released when the camera 100 is set to the alternate interlocking mode, and the connected camera 200 is released in the slave status. Camera 10
0 indicates that when the release switch is turned on from point a, the release operation is actually started from point b, and the terminal RL is turned on for tRA after tDRA after the shutter control ends (point e).
Output L from S. The time tDRA is a time expected so that the timing of lowering the output of the terminal RLS becomes about half of the time required for a normal release sequence of one frame. The camera 200 receives r
The release operation in the slave state is started from the point. When the camera 100 completes the release sequence of the frame at point g, the camera 100 immediately starts the release operation of the second frame, and outputs a release signal again from the terminal RLS at the same timing as the first frame. After the end of its own release sequence, the camera 200 performs the release operation again in the slave state. As described above, the camera 100 and the camera 200 alternately repeat the continuous release at a timing shifted by one half cycle of just one frame.

In the operation of the connection example shown in FIG. 4, the terminals BAT, VCC, R
The four terminals X and TX did not appear in the description of the operation. This is because all the terminals are connected in order to have the possibility that the cable 500 can be used for accessories other than the present embodiment and the camera body. In this case, the terminals BAT or VCC are connected. If there is no problem even if the connection is made as it is, both the camera 100 and the camera 200
This is because diodes are inserted in series at both terminals of BAT and VCC.

[0025]

As described above, according to the present invention, it is possible to select a mode in which the two cameras are not linked while the two cameras are connected by a cable, and in this case, the power activation signal is not linked. Therefore, an effect of preventing unnecessary power consumption can be expected.

[Brief description of the drawings]

FIG. 1 is a conceptual diagram showing a configuration of the present invention.

FIG. 2 is a block diagram showing a circuit configuration and a connection relationship according to the embodiment of the present invention.

FIG. 3 is a block diagram showing a circuit configuration and a connection relationship according to the embodiment of the present invention.

FIG. 4 is a block diagram showing a circuit configuration and a connection relationship according to the embodiment of the present invention.

FIG. 5 is a bit map showing flags in a microcomputer according to the embodiment of the present invention.

FIG. 6 is a timing chart showing signal timings according to the embodiment of the present invention.

FIG. 7 is a timing chart showing signal timings according to the embodiment of the present invention.

FIG. 8 is a timing chart showing signal timings according to the embodiment of the present invention.

FIG. 9 is a timing chart showing signal timings according to the embodiment of the present invention.

FIG. 10 is a timing chart showing signal timings according to the embodiment of the present invention.

FIG. 11 is a flowchart of the microcomputer according to the embodiment of the present invention.

FIG. 12 is a flowchart of the microcomputer according to the embodiment of the present invention.

FIG. 13 is a flowchart of the microcomputer according to the embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 100 camera 101 microcomputer 111 connector 200 camera 201 microcomputer 211 connector 300 timer release device 301 timer circuit 400 mode selection device 401 microcomputer 500 cable

──────────────────────────────────────────────────続 き Continued on the front page (51) Int.Cl. ⁷ Identification symbol FI Theme coat ゛ (Reference) G03B 17/40 G03B 17/40 Z

Claims (2)

[Claims] An interlocking mode setting means for setting one of a plurality of interlocking modes; a power supply start signal terminal for inputting / outputting a power supply start signal; and an external power supply start request signal from the power supply start signal terminal. Power start signal input means for inputting; power start signal output means for outputting an external power start request signal to the power start signal terminal; power start operation means for requesting power start; Power control means for inputting a signal from the power start operation means and a signal from the power start signal input means, and outputting a signal to the power control means and the power start signal output means; When the power activation operation means is operated or when a power activation request signal is received from the power activation signal input means, the power activation means is activated, and the power activation operation means is activated. Power activation signal control means for determining the timing of a power activation request signal output from the power activation signal output means to the outside according to the interlock mode set by the interlock mode setting means when a stage is operated. A signal input / output control device for a camera. 2. The power supply apparatus according to claim 2, wherein the plurality of interlocking modes include a non-interlocking mode, and the signal control unit does not output a power activation request signal from the power activation signal output unit to the outside in the non-interlocking mode. 2. The signal input / output control device for a camera according to claim 1.