JP2005257837A - Shutter release device - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To simultaneously control shutters of a plurality of cameras incorporating electronic shutters, respectively. <P>SOLUTION: A shutter release device comprises a release switch 4 having an operating piece 12, a shutter half-press contact point 13 and a shutter full-press contact point 14; a first half-press photocoupler 16 and a first full-press photocoupler 17 connected to the electronic shutter of a first camera; and a second half-press photocoupler 18 and a second full-press photocoupler 19 connected to the electronic shutter of a second camera. The first half-press photocoupler 16 and the second half-press photocoupler 18 output a shutter half-press releasing signal to the electronic shutter, when conducting the shutter half-press contact point 13. The first full-press photocoupler 17 and the second full-press photocoupler 19 output a shutter full-press releasing signal to the electronic shutter, when conducting shutter full-press contact point. <P>COPYRIGHT: (C)2005,JPO&NCIPI

Description

  The present invention relates to a shutter release device that simultaneously performs shutter control of a plurality of cameras each incorporating an electronic shutter.

As a shutter release device that simultaneously controls the shutters of a plurality of cameras, a first camera and a second camera are connected by an electric cable, and the first camera has a photographing means, an operating means, a second Transmitting means for transmitting a release signal for instructing the release to the camera, and control means for transmitting a release signal to the second camera by the transmitting means in response to a predetermined operation of the operating means, The camera is provided with photographing means and receiving means for receiving a release signal from the first camera, and the second camera takes a picture simultaneously with the first camera by the release signal from the first camera. (For example, refer to Patent Document 1).
Japanese Patent Laid-Open No. 2001-109037, pages 1 to 11

  However, as described above, when multiple cameras with built-in electronic shutters are connected by electric cables, electrical signals between the electronic shutter control circuits mounted on each camera interfere with each other, causing malfunctions. There is a problem that occurs.

  Therefore, an object of the present invention is to provide a shutter release device that can perform shutter control simultaneously without causing electrical interference between a plurality of cameras each incorporating an electronic shutter.

  In order to achieve the above object, the shutter release device of the present invention is a shutter release device that simultaneously performs shutter control of a plurality of cameras.When each camera manually operates a shutter speed, an aperture, a focus, and the like, A release switch and a photocoupler connected to the electronic shutter of each camera are provided, and the photocoupler outputs a shutter release signal to the electronic shutter when the release switch is turned on. Moreover, it is preferable to provide a display unit for displaying when the release switch is turned on. In addition, when the electronic shutter of each camera automatically performs shutter speed, aperture, focus, etc. when pressed halfway, and when shooting in the fully pressed state, a release switch having a shutter half-pressed contact and a shutter fully-pressed contact A shutter half-press photocoupler connected to the electronic shutter of each camera, and a shutter full-press photocoupler, wherein the shutter half-press photocoupler is configured to operate when the shutter half-press contact is conducted. A half-press release signal is output to the shutter, and the shutter full-press photocoupler outputs a full-press release signal to the electronic shutter when the shutter full-press contact is conducted. In this case, it is preferable that the shutter release device includes a shutter half-press display unit that displays when the shutter half-press contact is conducted, and a shutter full-press display unit that displays when the shutter full-press contact is conducted. The shutter release device preferably has a power supply.

  As described above, according to the present invention, since the electronic shutter control circuit of each camera is electrically insulated by the photocoupler, no electrical interference occurs between the electronic shutter control circuits of each camera. Camera shutter control can be performed simultaneously. Further, the shutter control state of each camera can be visually recognized by the half-press display unit and the full-press display unit. Furthermore, by installing a power supply, it can be used both indoors and outdoors.

  Hereinafter, an embodiment in which the present invention is applied to a shutter release device that operates two cameras with an electronic shutter will be described in more detail with reference to the drawings. The first camera 1 and the second camera 2 each include an electronic shutter that automatically performs shutter speed, aperture, focus, and the like when half-pressed, and performs shooting operation when the shutter is fully pressed. A shutter release device 3 for controlling the electronic shutter of the first camera 1 and the electronic shutter of the second camera 2 includes a switch box 5 incorporating a release switch 4 and a circuit box 7 incorporating a shutter control circuit 6. It consists of and.

  The release switch 4 and the shutter control circuit 6 are connected by a switch cable 8, and the shutter control circuit 6 and the electronic shutter of the first camera 1 are connected by a first shutter cable 9, and the shutter The control circuit 6 and the electronic shutter of the second camera 2 are connected by a second shutter cable 10.

  The release switch 4 includes an actuator 12 that is pushed by a push button 11, and a shutter half-press contact 13 and a shutter full-press contact 14 that are in contact with the pushed actuator 12.

  In the circuit box 7, a battery 15 that serves as a power source, a first half-press photocoupler 16 that outputs a half-press signal to the first camera 1, and a first that outputs a full-press signal to the first camera 1. A full-press photocoupler 17; a second half-press photocoupler 18 that outputs a half-press signal to the second camera 2; a second full-press photocoupler 19 that outputs a full-press signal to the second camera 2; When the actuator 12 of the release switch 4 is electrically connected to the shutter half-press contact 13, for example, a shutter half-press display unit 20 formed of a light emitting diode that is lit in green, and when the actuator 12 is electrically connected to the shutter full-press contact 14, for example, red. And a shutter full-press display unit 21 made of a light emitting diode that is lit.

  The circuit box 7 is provided with three terminals 22, 23, 24 to which the switch cable 8 is connected on one side, and a wiring 25 to the actuator 12 of the release switch 4 is connected to the terminal 22. The terminal 23 is connected to a wiring 26 to the half-pressing contact 13 of the release switch 4, and the terminal 24 is connected to a wiring 27 to the full-pressing contact 14 of the release switch 4.

  Further, on the other side of the circuit box 7, three terminals 28, 29, 30 to which the first shutter cable 9 is connected and three terminals 31, 32, 33 to which the second shutter cable 10 is connected. The terminal 28 has wiring to the ground of the electronic shutter of the first camera 1, the terminal 29 has wiring to the half-pressing contact of the electronic shutter of the first camera 1, and the terminal 30 Are connected to wirings to the fully-pressed contacts of the electronic shutter of the first camera 1, respectively. The terminal 31 has wiring to the ground of the electronic shutter of the second camera 2, the terminal 32 has wiring to the half-press contact of the electronic shutter of the second camera 2, and the terminal 33 has the wiring Wirings to the fully-pressed contacts of the electronic shutter of the second camera 2 are respectively connected.

  Each of the photocouplers 16, 17, 18, and 19 has the same configuration, and light emitting diodes 16a, 17a, 18a, and 19a serving as light projecting units and phototransistors 16b, 17b, 18b, and 19b serving as light receiving units, respectively. Opposite.

  The shutter control circuit 6 includes a wiring 34 from the positive electrode of the battery 15 to the terminal 22 and light emitting diodes 16a, 17a, 18a, and 19a of the photocouplers 16, 17, 18, and 19 from the negative electrode of the battery 15. A wiring 35 connected in parallel to the cathode, a wiring 36 connected from the anode of the light emitting diodes 16a and 18a to the terminal 23, and a wiring 37 connected from the anode of the light emitting diodes 17a and 19a to the terminal 24 A wiring 38 connected to the terminal 28 from the emitter of the phototransistor 16b of the first half-pressing photocoupler 16, and a wiring connected to the terminal 29 from the collector of the phototransistor 16b of the first half-pressing photocoupler 16 39 and the emitter of the phototransistor 17b of the first full-press photocoupler 17 A wiring 40 connected to the wiring 38, a wiring 41 connected from the collector of the phototransistor 17b of the first full-pressing photocoupler 17 to the terminal 30, and a phototransistor 18b of the second half-pressing photocoupler 18. Of the second half-pressing photocoupler 18, the wiring 43 connected to the terminal 32 from the collector of the phototransistor 18 b of the second half-pressing photocoupler 18, and the photo of the second full-pressing photocoupler 19. A wiring 44 connected to the wiring 42 from the emitter of the transistor 19b and a wiring 45 connected to the terminal 33 from the collector of the phototransistor 19b of the second full-press photocoupler 19 are provided. The half-press display unit 20 is connected between the wiring 35 and the wiring 36, and the full-press display unit 21 is connected between the wiring 35 and the wiring 37.

  In the shutter release device 3 configured as described above, when the push button 11 is half-pressed to make the actuator 12 and the shutter half-press contact 13 conductive, the shutter half-press display unit 20 is lit and the first half-press is pressed. The light-emitting diode 16a of the photocoupler 16 and the light-emitting diode 18a of the second half-press photocoupler 18 are turned on. By this lighting, the phototransistor 16b of the first half-press photocoupler 16 and the second half-press photocoupler 18 are turned on. A photocurrent is generated in each phototransistor 18b, and a shutter half-press release signal is output to the electronic shutters of the first camera 1 and the second camera 2, respectively. In response to the shutter half-press release signal, the electronic shutter control circuits of the cameras 1 and 2 are activated, the electronic shutter is half-pressed, and a predetermined shutter half-press operation such as autofocus is performed.

  Subsequently, when the push button 11 is fully pressed to make the actuator 12 and the shutter full-press contact point 14 conductive, the shutter full-press display portion 21 is turned on and the light emitting diode of the first full-press photocoupler 17 is turned on. 17a and the light-emitting diode 19a of the second fully-pressed photocoupler 19 are lit, and light is emitted to the phototransistor 17b of the first fully-pressed photocoupler 17 and the phototransistor 19b of the second fully-pressed photocoupler 19, respectively. A current is generated, and a shutter full-press release signal is output to the electronic shutters of the first camera 1 and the second camera 2, respectively. In response to the shutter full-press release signal, the electronic shutter control circuits of the cameras 1 and 2 are operated, the electronic shutter is fully pressed, the shutter is released, and shooting is performed.

  When the shutter half-press release signal and the shutter full-press release signal are output, the electronic shutter control circuits of the cameras 1 and 2 are electrically insulated by the photocouplers 16, 17, 18, and 19, respectively. The electronic shutter control circuits 1 and 2 do not interfere with each other, and the electronic shutters of the cameras 1 and 2 can be controlled simultaneously. Further, the shutter control state can be visually recognized by the half-press display unit 20 and the full-press display unit 21, and further, since the battery 15 is mounted, it can be used regardless of the indoor or outdoor location. it can.

  In the above embodiment, the first and second cameras have been described without any particular limitation. For example, the first camera 1 is a silver salt camera and the second camera is a digital camera. By checking the digital camera image with a viewer, you can prevent re-shooting due to shooting mistakes, etc. without developing and printing the film of the silver halide camera, and select the shot image of the film of the silver halide camera it can. In the above embodiment, two cameras have been described, but the number of cameras is not limited to this. Furthermore, when each camera manually operates the shutter speed, aperture, focus, etc., a release device having a release switch and a photocoupler connected to the electronic shutter of each camera is used. Sometimes a shutter release signal may be output from the photocoupler.

Circuit diagram of shutter release device of this embodiment Schematic diagram showing first and second cameras connected to a shutter release device

Explanation of symbols

  DESCRIPTION OF SYMBOLS 1 ... 1st camera, 2 ... 2nd camera, 3 ... Shutter release apparatus, 4 ... Release switch, 6 ... Shutter control circuit, 11 ... Push button, 12 ... Actuator, 13 ... Shutter half-press contact, 14 ... Shutter full press contact, 15 ... battery, 16 ... first half press photocoupler, 17 ... first full press photocoupler, 18 ... second half press photocoupler, 19 ... second full press photocoupler, 16a, 17a, 18a , 19a ... light emitting diode, 16b, 17b, 18b, 19b ... phototransistor

Claims (5)

In a shutter release device that simultaneously controls the shutters of a plurality of cameras, the shutter release device includes a release switch and a photocoupler connected to the electronic shutter of each camera, and the photocoupler is connected to the electronic shutter when the release switch is turned on. A shutter release device that outputs a shutter release signal. The shutter release device according to claim 1, wherein the shutter release device includes a display unit that displays when the release switch is turned on. In a shutter release device that simultaneously performs shutter control of a plurality of cameras, a release switch having a shutter half-press contact and a shutter full-press contact, a shutter half-press photocoupler connected to each electronic shutter of each camera, and A shutter full-press photocoupler, the shutter half-press photocoupler outputs a half-press release signal to the electronic shutter when the shutter half-press contact is conducted, and the shutter full-press photocoupler is A shutter release device that outputs a full-press release signal to the electronic shutter when the full-press contact is conducted. The shutter release device includes a shutter half-press display unit that displays when the shutter half-press contact is conductive, and a shutter full-press display unit that displays when the shutter full-press contact is conductive. 4. A shutter release device according to 3. The shutter release device according to any one of claims 1 to 4, wherein the shutter release device includes a power source.

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