JPH07140520A - Shutter driving device for camera - Google Patents

Abstract

PURPOSE:To avoid using electromagnetic actuators so as to suppress the consumption of a battery at the time of exposing for a long time. CONSTITUTION:The shutter driving device for a camera is provided with electromagnetic actuators (54 and 56) for releasing a shutter, electromagnetic actuators (26 and 28) for releasing a film winding locking mechanism, electromagnetic actuator circuits 32 and 58 operating both of the electromagnetic actuators by the operation of a shutter button 30, a manual releasing button 57 releasing the shutter regardless of the shutter button 30, a manual releasing button 29 releasing time film winding locking mechanism, a projection 61 formed on a shutter speed dial 59 and a switch for disconnecting 63 disconnecting the electromagnetic actuator circuits 32 and 58 by the projection 61 at the time of exposing for a long time. Therefore, the electromagnetic actuators are not used at the time of exposing for a long time.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a shutter driving device for a camera, and more particularly to a structure of a shutter driving device in which lock release and shutter release of a film winding mechanism are controlled in association with each other.

[0002]

2. Description of the Related Art Conventionally, film winding, shutter charging, and shutter release are manually performed in large format cameras and the like. That is, the film is wound up by a certain amount, the shutter charge lever is set, and then the shutter release is performed by the shutter button. These operations are performed independently of each other. Therefore, there is an inconvenience that double shooting, aerial shooting, and the like occur, and in order to solve this, the applicant of the present invention has filed Japanese Patent Application
The invention of No. 266062 is proposed. In the control of the camera disclosed therein, the unlocking of the film winding mechanism and the shutter release are associated with each other, so that shooting cannot be performed unless the film is wound up, and the shutter for shooting is released by the electromagnetic actuator. At the same time, the film winding lock is released.

[0003]

However, in the conventional shutter driving device for a large format camera or the like, when photographing is performed by a long exposure, the exposure is performed for a long time during the exposure.
Since the electromagnetic actuator is operated, there is a problem that battery consumption increases and battery life shortens.

The present invention has been made in view of the above problems, and an object thereof is to drive a shutter of a camera capable of avoiding the use of an electromagnetic actuator and suppressing battery consumption when a long-time exposure is performed. To provide a device.

[0005]

In order to achieve the above object, a shutter drive device for a camera according to the present invention comprises an electromagnetic actuator for releasing a shutter and an electromagnetic actuator for releasing a film winding lock mechanism. , An electromagnetic actuator circuit that supplies power to both electromagnetic actuators by operating the shutter button, means for manually releasing the shutter release and film winding lock mechanism without using the shutter button, and setting the shutter speed A protrusion formed on the rotating member,
A switch that is opened by the protrusion when the rotating member is moved to the set position for a long time, and switches the electromagnetic actuator circuit to the disconnected state. According to the second aspect of the invention, a shutter button that can be operated only when the winding lock mechanism is working, and a charge lever for manually charging the shutter are provided. A first switch that closes when the shutter is charged,
A second switch that is closed when the shutter button is operated is provided, and both electromagnetic actuators are connected so that they operate only when both the first and second switches are closed.

[0006]

According to the structure of the first aspect, when the shutter button is pressed, the two electromagnetic actuators are operated, the shutter is released, and at the same time, the film winding lock mechanism is released to wind the film. Is possible. On the other hand, instead of using the shutter button, for example, the shutter release can be manually executed by the manual release button, and the film winding lock mechanism can be manually released by the manual release button. When performing long-time exposure, the shutter speed dial is set to the long-time position. At this time, the projection opens the disconnection switch and the electromagnetic actuator circuit is disconnected. Therefore, if the manual release button is continuously pressed, long-time exposure becomes possible and the electromagnetic actuator does not operate at all.

Further, according to the structure of the second aspect, when the film is manually wound up by one film and the winding mechanism is locked, the shutter button can be pressed. However, if the charging operation is not performed, the shutter operation is not performed even if the shutter button is pressed because the first switch is not closed. This prevents aerial photography. Then, when this shutter charge is executed, the first switch is closed, and when the second switch is closed by the shutter button, the two electromagnetic actuators are operated, the shutter is released, and at the same time, the winding lock mechanism is released. To be done. At this stage, the film can be wound, but the shutter button cannot be pressed here. Therefore, double shooting cannot be performed. Even in such a configuration, when the shutter speed setting dial is set to the position for a long time, the electromagnetic actuator circuit is disconnected and the battery is not consumed.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS FIG. 1 shows the configuration of a shutter driving device for a camera according to an embodiment, and FIG. 2 shows an operating circuit of an electromagnetic actuator. In FIG. 1, a shutter driving device 10 is composed of a camera body 12 and a replaceable lens portion 14, and is applied to a large format camera. The main body 12 includes a winding roller 18 for winding the film 16 and a winding lever 20 for rotating the winding roller 18.
The winding roller 18 and the winding lever 20 are provided.
A gear 22 that rotates in conjunction with the hoisting operation of the hoisting lever 20 is interposed between the and.

A crescent-shaped locking lever 24 is rotatably attached to the housing of the main body 12 on the main body 12, and a claw portion at one end of the locking lever 24 is attached to the gear 22.
Is attached so that it can be engaged with. This locking lever 24
Is provided with a solenoid 26 and a core 28 as an electromagnetic actuator.
Is arranged to push the other end of. The locking lever 24 and the electromagnetic actuator constitute a winding lock mechanism. Therefore, when a current flows through the solenoid 26, the locking lever 24 is pushed by the core 28 and rotated in the counterclockwise direction, whereby the engagement with the gear 22 is released. In this state, the film 16 can be wound up, but when one film 16 is wound up,
The locking lever 24 is rotated in the clockwise direction and engaged with the gear 22 by a drive mechanism that is interlocked with a counter (not shown).

The core 2 of the electromagnetic actuator
Manual release button 29 having a drive shaft at a position where 8 can be pressed
The manual release button 29 is arranged on the outer surface of the camera so that it cannot be operated carelessly. Therefore,
By pushing the core 28 by manually operating the manual release button 29, the locked state of the locking lever 24 can be released. Further, the main body 12 is provided with a non-locking type shutter button 30, and the shutter button 30 can be pressed only when the locking lever 24 is engaged with the gear 22 by various known structures. Configured to be possible. An electromagnetic actuator circuit 32 is provided to drive the solenoid 26.

On the other hand, the lens section 14 includes lenses 44, 4
6, a shutter portion 48 is arranged, and in this shutter portion 48, a charge lever 50 and a release lever 5 of the shutter are provided.
Two are provided. By moving the charge lever 50 to the upper side of the arrow, the biasing force can be charged and a shutter (not shown) can be set. A solenoid 54 and a core 56 as electromagnetic actuators are provided near the release lever 52, and the core 56 is arranged so as to push the release lever 52. Therefore, when a current flows through the solenoid 54, the release lever 52 is pushed by the core 56 and operates, thereby opening and closing the shutter. An electromagnetic actuator circuit 58 is provided so as to be connected to the solenoid 54, and the electromagnetic actuator circuit 58 is connected to the electromagnetic actuator circuit 32 on the main body 12 side.

Further, the core 56 of the electromagnetic actuator is also provided.
Manual release button 5 with drive shaft at the position where you can press
7 is provided on the outer surface of the camera so that the manual release button 57 cannot be operated carelessly. Therefore, the release lever 52 can be driven by pushing the core 56 by manually operating the manual release button 57. Further, a shutter speed dial (rotating member) 59 is arranged coaxially with the shutter portion 48,
A protrusion 61 is attached to the shutter speed dial 59, and the cut switch 63 is placed at a position where the protrusion 61 is contacted.
Switch pieces 63A and 63B are arranged. That is,
The projection 61 pushes the switch piece 63A when the shutter speed dial 59 is turned to the long-term position (end position). When the switch piece 63A is separated from the switch piece 63B, the disconnection switch 63 is opened. (OFF) state.

FIG. 2 shows the electromagnetic actuator circuit 3 described above.
2 and 58 are shown in detail, and as shown, both electromagnetic actuator circuits 32, 58 have contacts 34 and 6
Connected by 0. That is, in the embodiment, the solenoid 26 and the solenoid 54 are connected not in series but in parallel to the battery 36 arranged on the main body 12 side, and the first switch is connected to the lens section 14 side in the common line at the center of the drawing. The second switch 38 is connected to the side of the main body 12 and the disconnection switch 63 described above. Then, the first switch 62 is closed in conjunction with the setting operation of the charge lever 50, and is opened in conjunction with the shutter release operation. The second switch 38 is the shutter button 30.
It is closed in conjunction with pressing. Therefore, the solenoids 26 and 54 are operated when the charge lever 50 is set and the shutter button 30 is pressed while the disconnection switch 63 is not turned off.

Then, the shutter speed dial 5
When the disconnection switch 63 is opened due to the long time setting of 9, the electromagnetic actuator circuit is disconnected and the electromagnetic actuator does not operate even when the first switch 62 and the second switch 38 are turned on.

The embodiment is constructed as described above, and its operation will be described below. First, when the winding lever 20 of FIG. 1 is manually rotated to wind the film 16 by one frame, the locking lever 24 is locked to the gear 22 and the film winding mechanism is locked. Next, when the charge lever 50 of the shutter portion 48 is moved to enable photographing (charge state), the first switch 62 of FIG. 2 is closed. After that, the shutter button 30 is pressed during shooting without long-time exposure, and the second switch 38 is closed at this time, so the battery 36 applies a predetermined voltage and current to both solenoids 26 and 54. Then, the electromagnetic actuator operates. That is, in the lens unit 14, the core 56 moves and pushes the release lever 52, so that the shutter is released and photographing is performed, and in the main body 12, the core 28 moves and pushes the locking lever 24. Is released. The first switch 62 is in the open state in conjunction with the release operation. Therefore, the film can be further wound, and the above operation can be repeated.

According to the above operation, when the film 16 is forgotten to be wound up, the shutter lever 30 is pushed because the locking lever 24 is in the released state regardless of whether the charge lever 50 is set or not. It is not possible. Therefore, double shooting can be prevented. Also, if you forget the charging operation even when the film is wound up,
Since the first switch is not closed, the shutter operation is not performed even if the shutter button 30 is pressed. Therefore, this prevents aerial photography. Further, since the solenoids 26, 54 of the above-described embodiment are connected in parallel to the battery 36, a stable solenoid drive voltage is supplied, and a battery with a small output is used. Even if there is, there is an advantage that sufficient power can be supplied to operate the electromagnetic actuator.

For long-time exposure, the shutter speed dial 59 is turned counterclockwise and set to the long-time position. At this time, the protrusion 61 pushes the switch piece 63A, so that the switch piece 63A 63B is separated and the disconnection switch 63 is opened. Therefore, FIG.
Even when the shutter button 30 is pressed, the solenoid actuator circuit is disconnected from the electromagnetic actuator circuit, and no electric power is supplied to the solenoids 26 and 54. In this state, when the manual release button 57 in FIG. 1 is pressed, the shutter is opened by the operation of the release lever 52, and the desired long-time exposure is possible by continuing to press the manual release button 57. As described above, in this long-time exposure, no battery is consumed because no electromagnetic actuator is used.

After the long-time exposure is completed, the manual release button 29 is pushed to press the gear 2 of the locking lever 24.
Since the locking to 2 is released, one film 16 can be wound up.

[0019]

As described above, according to the first aspect of the invention, the shutter release and the manual means for releasing the film winding lock mechanism and the shutter speed are set without using the shutter button. Since the protrusion formed on the rotating member and the switch for disconnecting the electromagnetic actuator circuit at the time of long exposure by the protrusion are provided, use of the electromagnetic actuator at the time of long exposure can be avoided, The consumption of the battery can be suppressed and the life of the battery can be extended.

Further, according to the second aspect of the invention, since the first switch and the second switch are provided and both electromagnetic actuators are operated only when these switches are closed, the double shooting is performed. It is possible to prevent battery consumption during long-time exposure with a device capable of preventing shooting, aerial photography, and the like.

[Brief description of drawings]

FIG. 1 is a diagram showing a configuration of a shutter drive device of a camera according to an embodiment of the present invention.

FIG. 2 is a diagram showing a configuration of an electromagnetic actuator circuit of FIG.

[Explanation of symbols]

 10 ... Shutter drive device, 12 ... Camera body, 14 ... Lens part, 24 ... Locking lever, 26, 54 ... Solenoid, 28, 56 ... Core, 29 ... Manual release button, 32, 58 ... Electromagnetic actuator circuit, 36 ... Battery, 38 ... 2nd switch, 48 ... Shutter part, 50 ... Charge lever, 52 ... Release lever, 57 ... Manual release button, 59 ... Shutter speed dial, 61 ... Protrusion, 62 ... First switch, 63 ... Disconnection switch.

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[Procedure amendment]

[Submission date] December 29, 1993

[Procedure Amendment 1]

[Document name to be corrected] Drawing

[Correction target item name] All drawings

[Correction method] Change

[Correction content]

[Figure 1]

[Fig. 2]

Claims (2)

[Claims] 1. An electromagnetic actuator for releasing a shutter, an electromagnetic actuator for releasing a film winding lock mechanism, an electromagnetic actuator circuit for supplying power to both electromagnetic actuators by operating a shutter button, and a shutter release. And a means for manually releasing the film winding lock mechanism without using a shutter button, a protrusion formed on a rotating member for setting a shutter speed, and a case where the rotating member has moved to a setting position for a long time. A shutter drive device for a camera, which includes a switch that is opened by a protrusion and that disconnects the electromagnetic actuator circuit. 2. A shutter button operable only when the winding lock mechanism is working, and a charge lever for manually charging the shutter are provided, and the shutter is charged in the electromagnetic actuator circuit. A first switch that is sometimes closed and a second switch that is closed when the shutter button is operated are provided, and both electromagnetic actuators are connected so that they operate only when both the first and second switches are closed. The shutter drive device for a camera according to claim 1, wherein the shutter drive device is a camera.