JPS6235069Y2 - - Google Patents

Description

[Detailed Description of the Invention] The present invention includes an automatic exposure control circuit including a photometric circuit, and further includes an operating member movable between a power supply position and a non-power supply position to control power supply to the photometry circuit.
For example, there is a camera-side photometry switch for controlling power supply to the photometry circuit that is turned off when the winding lever is retracted and turned on when it is pulled out, and a safety switch that is turned on/off depending on the two states of the winding lever. The present invention relates to a switch device for a motor drive device installed in a camera.

For example, when this type of motor drive device is attached to a camera, the safety switch and the power supply circuit to the motor are connected in series through the connection terminal to form a motor power supply circuit, and when the winding lever is in the pulled out state, When the safety switch is turned off, the power supply circuit to the motor is opened and the motor drive device does not operate. This is because if the motor drive device is allowed to operate when the film advance lever is in the extended position, there is a high risk that the film will be wound from both the film advance lever and the motor drive device, which could damage the camera's winding mechanism. This is to prevent this from happening.

Furthermore, in such a motor drive device, the motor drive on the motor drive device side is connected via the connection terminal so that power can continue to be supplied to the photometry circuit even when the winding lever is retracted and the camera side photometry switch is off. The side photometry switch is connected in parallel with the camera side photometry switch on the camera side, and by pressing the trigger button on the motor drive device, the on/off of the motor drive side photometry switch is controlled, making it possible to control the power supply to the photometry circuit. . Such a motor drive device further includes a delay circuit that prevents the motor from operating for a certain period of time after the photometry switch on the motor drive side is turned on until the operation of the photometry circuit stabilizes. This prevents automatic exposure control from failing.

When remotely controlling a motor drive device equipped with a motor drive side photometry switch and a delay circuit as described above using a remote control device, the trigger button is not pressed, so the motor drive side photometry switch and delay circuit are connected in parallel. The switching element is controlled by the output of the remote control device.
Must be turned on/off.

Also, when performing electric photography using a remote control device, the switching element must be
The drawback is that the delay circuit operates each time it is turned on and off, which hinders high-speed shooting.

Therefore, the purpose of the present invention is to eliminate the need for a special circuit for supplying power to the photometry circuit in a motor drive device equipped with such a photometry switch and delay circuit on the motor drive side, and to further speed up photography. The object of the present invention is to provide a switch device for

Hereinafter, the present invention will be explained based on examples.

In FIG. 1 showing an embodiment of the present invention, 1a is a motor drive device, 1b is a camera equipped with an automatic exposure control circuit including a photometry circuit, and 1c is a remote control device (for example, a timer control device or a wireless control device). It is.

First, regarding the camera 1b, 2 is a photometry circuit, 3 is a power battery, and 4 is the camera side photometry switch which is turned off when the winding lever 102 is retracted and turned on when it is pulled out. 5 is a shutter operation switch that is turned on when the camera winding is completed and turned off when the shutter is closed; 6 is connected in series with the shutter operation switch 5, and when the winding lever is in the retracted state,
This is the safety switch mentioned above, which is on and off when it is pulled out. A camera-side photometric switch 4 is connected between terminals 7a and 7b, and a shutter operation switch 5 and a safety switch 6 are connected in series between terminals 7c and 7d.

Next, the motor drive device 1a will be described. Between the terminals 7a' and 7b', a switch 8, which is turned on when a device for transmitting the output of the remote control device 1c to the motor drive device is installed, and the above-mentioned photometric switch 9 on the motor drive side are connected in parallel. For these, the main switch 11a
are connected in series. Switches 9 and 8 are the first and second switch means of the present invention, respectively. Between terminals 7c' and 7d', motor M, switch 10, main switch 11b, and delay switch 1 are connected.
2 and a power supply 14 are connected in series. The motor drive side photometric switch 9 and the switch 10 are interlocked with a trigger button 100, and when the trigger button 100 is in the first step, the motor drive side photometric switch 9 is turned on, and when the trigger button 100 is in the second step, the switch 10 is turned on. Main switch 11a,
11b is a double switch.

The delay circuit 13 starts timing when current flows from the camera power battery 3 to the motor drive side via the switch 11a and the motor drive side photometry switch 9 or switch 8, and when the time required for the photometry circuit 12 to stabilize its operation has elapsed. , delay switch 12
Turn on. A mode changeover switch 108 is used to switch between single frame photography and continuous photography.

The output of the remote control device 1c is terminal 1.
The signal is transmitted to the motor drive device via 01a and 101b, and turns on/off the switching element 18 connected in parallel with the switch 10. Terminal 101b
is the mounting part of the present invention.

An embodiment of switch 8 is shown in FIG. That is, when the remote cord socket 15 for transmitting the output from the remote control device to the motor drive device is inserted into the remote terminal 17 of the motor drive device, the terminals 101a and 101
b are engaged to establish an electrical connection, thereby remotely controlling the motor drive. At the same time, one end 15a of the socket 15 pushes the pin 20 and the head 20a of the pin 20 pushes the switch contact pieces 8a, 8.
b. As a result, the switch 8 shown in FIG. 1 is turned on, and power supply to the photometric circuit 12 is started.

Next, we will discuss the operation. When not using the remote control device 1c, first turn on the main switches 11a and 11b, and then press the trigger button 100. At this time, on the camera side, the winding lever is in the retracted state, and if the film winding is completed, switches 5 and 6 are on, so after the above delay time, the motor M is activated to release the shutter and wind the film. This process is repeated according to the shooting mode. Since the above operation is well known, further explanation will be omitted.

Now, when the remote control device 1c is attached to the motor drive device 1a, the switch 8 is activated.
The delay circuit 13 starts counting time, and after the above delay time, the switch 12 is turned on. Thereafter, since the switch 8 remains on, the delay switch 12 remains on by the delay circuit 13. That is, the delay circuit 13 is equipped with the remote control device 1c and the switch 8 is turned on.
It operates only once when the switch 8 is turned off, and does not operate thereafter until the switch 8 is turned off again. Therefore, the delay circuit 13 does not operate every time a trigger operation is performed by the remote control device, and high-speed photographing can be achieved. Then, by applying the output of the remote control device 1c to the switching element 18, the trigger button 100 is activated.
Shooting will be performed in the same way as when you press .

It is clear that when the wireless control device is used, the switch 8 may be turned on in conjunction with the operation of attaching the receiving device to the motor drive device.

As described above, according to the present invention, it is possible to eliminate the obstacle caused by the delay circuit of the motor drive device during remote control, and it is possible to increase the speed of photographing.

[Brief explanation of the drawing]

FIG. 1 is a diagram showing an embodiment of the present invention. FIG. 2 is a diagram showing an embodiment of the switch 8 of FIG. 1. Explanation of symbols of main parts, first switch means...
9, Delay means...12, 13, Mounting part...101
b. Second switch means...8.

Claims (1)

[Claims for Utility Model Registration] A first switch means 9 that can be attached to a camera equipped with an automatic exposure control circuit and that operates the automatic exposure control circuit in conjunction with the operation of an external operating member;
delay means 12 and 13 that start timing in synchronization with the operation of the switch means and generate an output after counting a predetermined time required for stable operation of the automatic exposure control circuit;
The first trigger switch 10 is activated in response to a trigger operation, and the delay means 12 and 13 generate an output, and when the first trigger switch 10 is activated, power supply to the motor is started. A motor drive device comprising: a mounting portion to which a transmission device for transmitting an output signal output from a remote control device for remote operation of the motor drive device to the motor drive device; a second switch means 8 for operating the automatic exposure control circuit and for operating the delay means independently of the first switch in conjunction with being attached to the remote control device; and a trigger signal from the remote control device. The second trigger switch 1 is operated in accordance with
8, the delay means 12, 13 are actuated by the second switch means 8 to generate an output, and when the second trigger switch 18 is actuated, power supply to the motor is started. Characteristic motor drive device.