JP2920684B2 - camera - Google Patents

Description

Description: BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera connected to a camera to control the release of the camera.

[Prior Art] Conventionally, in order to control a plurality of cameras at the same time, cables are connected to a connector provided with a release input terminal, and signals are simultaneously supplied to these cables to release the cameras. .

[Problems to be Solved by the Invention] However, the conventional camera has a problem that when a connected camera has only release input means, a plurality of cameras cannot be released at the same time.

Accordingly, it is an object of the present invention to provide a camera that can simultaneously release the camera regardless of the function of another camera connected to the camera that can output a release output signal by operating a release button.

[Means for Solving the Problems] In order to solve such problems, a camera according to the present invention is configured such that cameras are connected by a cable and one camera is operated to release another camera. In such a case, the release output of the camera which operates the release button is set as a pulse output for a predetermined time so that the release timing can be synchronized with another camera.

[Operation] In the present invention, even when a camera having no signal output means indicating the state of the release sequence is connected via a connector, another camera connected by the connector is simultaneously operated by the release operation of one camera. You can release it. Furthermore, simultaneous release of three or more cameras is also possible.

[Example] Hereinafter, an example of the present invention will be described in detail with reference to the drawings.

FIG. 1 is a circuit diagram showing a configuration of a camera according to an embodiment of the present invention. In the figure, 1 is a battery, 2 is a DC-DC converter for converting a battery voltage into a stable voltage, 3 is a microcomputer for controlling a camera, 4 is a connector, 5,
6 is a transistor, 7 to 11 are diodes, and 12 and 13 are switches.

The DC-DC converter 2 includes a power input terminal Vin ⁺ , a power input terminal Vin ⁻ , an output terminal Vout for supplying a stable voltage to a circuit system inside the camera, and a control terminal CI for turning on / off the output terminal Vout. When the control terminal CI is grounded, the DC-DC converter 2 starts and the output terminal Vout
A more stable voltage is output.

The microcomputer 3 has power terminals Vdd and Vss
Are provided, and input / output ports P01, P02, P10 to P10
15 are provided. Further, the microcomputer 3 includes a storage unit, a calculation unit, a clock unit, and the like.
Input Port Port P01 of the microcomputer 3 is connected to the input terminal 4 _first connector 4, the port P02 is output port connected to the output terminal 4 _second connector 4, the port P10 is the release pin 4 ₃ of the connector 4 the connected input port, the port P11 is input port connected to the start terminal 4 ₄ of the connector 4, the port P12 and the port P13
Is an output port connected to the gates of the transistors 5 and 6, respectively, a port P14 is an input port for inputting a release signal, and a port P15 is an input port for inputting a camera start signal.

The switches 12 and 13 are switches mounted as release buttons on the camera body.
Is a switch that is turned on by the first stroke of the release button, and switch 13 is a switch that is turned on by the second stroke of the release button. Now, when the switch 12 is turned on, the control terminal CI of the DC-DC converter 2 is grounded via the diode 11, whereby the DC-DC converter 2
Is activated, a voltage is supplied from the output terminal Vout, and power is supplied to the microcomputer 3 and other circuits (not shown) to activate the camera. At the same time, the state of the switch 12 is also input to the port P15 of the microcomputer 3 via the diode 10, the camera operates, and the operation of the DC-DC converter 2 is continued for a certain time by a power supply hold circuit (not shown). I have. The switch 13 is turned on by the second stroke of the release button, and this signal is inputted to the port P14 of the microcomputer 3.
When the port P14 is grounded, the camera performs a release operation.

Connector 4, the start terminal 4 ₄ is connected to the cathode and the drain of the transistor 5 of the diodes 8 and 9, by grounding the terminal, in the same status as the first stroke of the release button, the camera is activated. Also,
Release pin 4 ₃ is connected to the drain port P10 and the transistor 6 of the microcomputer 3 via the diode 7, by grounding the terminal, the microcomputer 3 determines that the release signal is input, the camera Is released. That is, when the switch 12 is turned on by the first stroke of the release button or the starting terminal 44 of the connector ₄ is grounded, the DC-DC
The converter 2 starts, and the microcomputer 3 starts operating. The fact that the switch 12 is turned on is detected at the port P15 of the microcomputer 3, and when the starting terminal 44 of the connector ₄ is grounded, the signal is detected at the port 11 of the microcomputer 3. Starts the operation. Similarly signal when the release pin 4 ₃ signals and connector 4 of the switch 13 is grounded to turn on by a second stroke of the release button, the port P1 of each of the microcomputer 3
Detected at 4 and port P10, release the camera.

Here, in the present invention, the switch 12 is turned on by the first stroke of the release button, and when the start signal of the camera is input, the output of the port P12 is set to “H” to turn on the transistor 5, and Second release button
When the switch 13 is turned on by the stroke and the release signal of the camera is input, the output of the port P13 is set to "H" to turn on the transistor 6. That is, turned on start and release operation state of each transistor 5 and 6 of the release button, start terminal 4 ₄ of the connector 4, the release pin 4 ₃ will output the "L". In which like connector each GND terminal 4 ₅ via the connector 4 other camera having, activated terminal 4 _4, by connecting to the release terminal 4 _3, activation signal to other connected cameras, release The signal will be transmitted.
Further, in the present invention, when it is release by the release pin 4 ₃ signal connector 4, a camera in the release sequence (mirror-up, shutter control, the film winding) outputs a signal from the port P02 of the microcomputer 3 It has become.

On the other hand, when the release operation by the release button, the release from the release pin 4 ₃ outputs a to the connector 4 to "H" of the port P13 to input signals from the port P01 of the microcomputer 3. When not been predetermined signal input outputs a signal, so as to prohibit the output of the release signal from the release pin 4 ₃ of the connector 4 When predetermined signals are inputted.

When two cameras configured as described above are connected via the connector, when the first camera is operated for release, the second camera is simultaneously released. Further, when the second camera is in the release sequence (release prohibited state),
Even if the release operation of the camera is performed, the output of the release signal from the first camera is prohibited because the signal notifying the release sequence is being input from the second camera to the first camera. At this time, the first camera is also configured to prohibit the release, so that the two cameras are released at the same time.

Figure 2 is a camera 20 having a release button 20a configured to this, the release pin 4 _3, start terminal 4 ₄ and G
Is a connection diagram of a case where the camera 21 having an input terminal of the release, such as ND terminal 4 ₅ connected via the connector 4. In the figure, GND terminal 4 ₅ of the connector 4 of the camera 20, start terminal
4 ₄ and the release terminal 4 ₃ are the GND terminals 4 ₅ and
Start terminal 4 ₄ is connected to a release pin 4 _3. Note that 2
1a is a release button of the camera 21.

FIG. 3 shows a driving time chart of two cameras connected as shown in FIG. 3, the operation will be described focusing on the camera 20 in FIG. Before the time T10, the output of the port P02 of the camera 20, that is, the release sequence signal of the camera 20 is "H", and since no input is connected to the port P01, "H", that is, the camera 21 is always It is recognized that the release is possible. Therefore, it indicates that the release of the two cameras is not prohibited. Now, when the release operation of the camera 20 is performed in time T10, and outputs a release signal from the release pin 4 ₃ of the connector 4. Thereby, the camera 20 and the camera 21 are released. Time T11
To enter the release sequence, the camera 20 and camera
21 outputs a signal indicating this from each port P02. It can be seen that the release sequence of the camera 21 has been completed at time T12. Further, at time T13, the output of the port P02 becomes “H”, indicating that the release sequence of the camera 20 has been completed. Here, since the release button of the camera 20 is kept pressed, the camera 21 is released at the time T14, and the camera 20 is released at the time T15.
Simultaneous release of the two cameras will not be achieved. When the release operation of the camera 20 is released at time T16, the output of the release signal also stops. Then, at time T17, the release operation of the camera 20 is completed, and at time T18, the camera 21 is released.
Release operation ends. Therefore, the first release operation is performed simultaneously by the two cameras at time T11,
In the second release operation, the camera 20 starts at time T15, the camera 21 starts at time T14, and the two cameras cannot release at the same time.

Here, in the present invention, even if the release button is kept pressed, the release signal is output only for a certain period of time.

FIG. 4 shows an operation sequence according to the present invention. In the figure, when the release button of the camera 20 is operated at a time T20, the camera 20 outputs a release signal and enters a release sequence itself, and a signal indicating the same is output at a time T21. At time T22, a predetermined time elapses by the timing means of the microcomputer 3,
Regardless of the operation state of the release button 20a of the camera 20, the output of the release signal is stopped. Further, the release sequence of the camera 21 ends at time T23, and the release sequence of the camera 20 ends at time T24. As a result, the camera 20 outputs a release signal again, whereby the camera 21 is released and the camera 20 enters the release sequence (time T25). When the predetermined time has elapsed again, the camera 20 stops outputting the release signal at time T26. The operation of the release button 20a of the camera 20 is released at time T27, the release sequence of the camera 21 ends at time T28, and the release sequence of the camera 20 ends at time T29. Thus, the release button 20a of the camera 20
Regardless of the operation of, the release signal output is
Here, since it is limited to time T20 to T22 and time T24 to T26,
Even if the camera 21 does not output a release sequence, simultaneous release of the two cameras is achieved. Further, this time is set shorter than the time required for one release sequence of the camera. This can prevent two frames from being released by a single release signal output.

FIG. 5 shows a connection diagram when two cameras having functions according to the present invention are connected. In the figure, GND terminal 4 ₅ of the connector 4 of the camera 20, start terminal 4 _4, GND terminal 4 ₅ of the release pin 4 ₃ connector 4 of each camera 22, start terminal 4 ₄ is connected to a release pin 4 ₃ I have. The input terminal 4 _first camera 20 is connected to the output terminal 4 _second camera 22, the input terminal 4 _first output terminal 4 _second camera 20 is a camera 22
It is connected to the. Therefore, signals indicating the release sequence of the two cameras are input to each other. 22a is a release button of the camera 22.

FIG. 6 shows a sequence of simultaneous release of the two cameras thus connected. Here, it is assumed that the release button 20a of the camera 20 is operated. Now, before the time T0, the output of the port P02 of the camera 20 and the input of the port P01 are “H”. Therefore camera 20,
This indicates that neither camera 22 is in the release sequence. Therefore, both cameras are ready for release. When the release button 20a of the camera 20 is pressed at time T0, and outputs a release signal from the release pin 4 ₃ of the connector 4 of the camera 20. This causes the two cameras to enter the release sequence at time T1. As a result, the port P02 of the camera 20 outputs "L", and the port P01 receives the signal "L" indicating that the camera 22 is in the release sequence. Here, when the predetermined time has elapsed, the camera 20 stops outputting the release signal at time T2 regardless of the state of the release button 20a. At time T3, the release sequence of the camera 20 ends, and at time T4, the release sequence of the camera 22 ends. At this time, release button 20a of camera 20
Since is kept pressed, the release signal of the camera 20 is output again at time T4 when both cameras are ready for the next release. Thus, the release operation of the cameras 20 and 22 starts again at time T5. When a predetermined time has elapsed from time T4, the output of the release signal of the camera 20 stops at time T6. Then, the release sequence of the camera 20 ends at time T8, and the release sequence of the camera 22 ends at time T9.
Is not pressed, the next release signal is not output at time T9.

The connection between the camera 20 and the camera 22 is symmetric as can be seen in FIG. Therefore, by operating the camera 22, simultaneous release of the camera 20 is also possible.

[Effects of the Invention] As described above, according to the present invention, the output of the release signal by operating the release button is completed in a predetermined time regardless of the state of the release button. Simultaneous release of two cameras can be achieved even with only input means. Of course, by connecting two cameras having connectors of the same function via the connector, it is possible to simultaneously release other cameras connected thereto by operating the release button of one camera. Further, if the cameras are connected by a cable, extremely excellent effects such as simultaneous release of three or more cameras can be obtained.

[Brief description of the drawings]

FIG. 1 is a circuit diagram showing a configuration of a camera according to an embodiment of the present invention. FIG. 2 is a plan view showing an example in which the camera according to the present invention and a camera having a release input terminal are connected via a connector. 3 is a diagram showing a driving time chart of the camera according to the present invention shown in FIG. 2, FIG. 4 is a diagram showing a driving time chart of two cameras connected as shown in FIG. 2, and FIG. FIG. 6 is a plan view showing an example in which cameras having the same function as the camera according to the present invention are connected via a connector, and FIG. 6 is a diagram showing a drive time chart of simultaneous release of the two cameras connected as shown in FIG. is there. 1 ... battery, 2 ... DC-DC converter, 3 ... microcomputer, 4 ... connector, 4 ₁ ... input terminal, 4 ₂ ...
… Output terminal, 4 ₃ …… Release terminal, 4 ₄ …… Start terminal, 4 ₅
…… GND terminal, 5,6 …… Transistor, 7-11 …… Diode, 12,13 …… Switch, 20,21,22 …… Camera, 20a, 2
1a, 22a …… Release button.

Claims (2)

(57) [Claims] A camera having a release terminal for inputting / outputting a release signal in a connector and outputting a release signal from the release terminal based on a release operation of a release button, wherein a timer is provided, and the release of the release button is provided. A camera, wherein the output of a release signal from the release terminal by an operation is continued for a predetermined time of the timing unit. 2. A camera comprising: a connector having a release terminal for inputting / outputting a release signal; and outputting a release signal from the release terminal based on a release operation of a release button, and an input terminal for inputting a signal to the connector; An output terminal for outputting a signal is provided.When a release sequence signal indicating a release operation of an externally provided camera is input to the input terminal at the time of a release operation of the release button, the output of the release signal from the release terminal is performed. A camera that outputs a release signal from the release terminal and outputs a release sequence signal from the output terminal when the release sequence signal is not input to the input terminal.