JPH0214034Y2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention includes an empty winding device for loading a film in a collapsible camera, and more particularly, a device for preventing double film winding. That is, the present invention relates to a blank winding device for loading film in a camera in which the film cannot be wound until after the double winding preventing device is released by pressing down on the shutter button.

For example, in a camera equipped with a double winding prevention device as described above, even when loading film, it is necessary to press the shutter button to release the shutter every time the film is wound. The operability was very poor.

In addition, in electric shutters, the exposure time is automatically determined according to the amount of shooting light, and if the amount of shooting light is such that the exposure is insufficient, a release lock device operates to prevent the shutter button from being pressed down.
Even when loading the film in a dimly lit place, the release lock was activated and the film could not be wound. For this reason, in an electric shutter, the shutter mechanism is switched from electrical control to mechanical control when loading a film to prevent the release lock from working. This has the disadvantage that the configuration becomes complicated.

Furthermore, in the case of retractable cameras, even if the shutter button is pressed by mistake while the lens barrel is retracted, the shutter will not operate, and the shutter will be activated only when the lens barrel is pulled out. It has been devised to be. For this reason, in a collapsible camera, film can only be loaded with the lens barrel pulled out, which is inconvenient.

The present invention was developed in view of the above-mentioned drawbacks of the conventional camera, and it is a camera film loading system that allows film winding to be carried out independently of the shutter button operation by simply opening the back cover in any state of the retractable camera. The purpose is to provide a device for winding up time.

The object of the present invention is achieved by configuring the winding prevention device to be released in conjunction with the opening of the camera back.

The present invention will be explained below based on an embodiment shown in the drawings.

FIG. 1 is a plan view of the collapsible camera with the upper part removed, and the lens barrel is housed within the camera body.

Then, in the shutter set state shown in the figure, 1
2 is the camera body, 2 is the back cover, and 3 is the lens barrel. Reference numeral 4 designates a film counter feed lever, which is formed with a bent portion 4a and an arm portion 4b, is guided by guide pins 5 and 6, and is biased by a driving force by a spring 7. 2 and is restrained. Reference numeral 8 designates a first interlocking lever, which is formed with a surface portion 8a, has a pin 8b planted thereon, is pivotally supported by a shaft 9, and is biased with a levorotatory driving force by a spring 10. The film counter feed lever 4
is restrained by contacting the arm portion 4b. Reference numeral 11 designates a second interlocking lever, which is formed with an arm portion 11a, has a pin 11b mounted thereon, is pivotally supported by a shaft 12, and is biased with a dextrorotatory driving force by a spring 13. 11b comes into contact with the surface portion 8a of the first interlocking lever 8 and is restrained. Reference numeral 14 denotes a winding prevention lever, which is formed with a hook portion 14a, arm portions 14b and 14c, has a pin 14d planted thereon, and is pivotally supported on a shaft 15.
Although the spring 16 imparts right-turning behavior, the arm portion 14c is restrained by coming into contact with a set lever 26, which will be described later. Reference numeral 18 denotes a lens barrel interlocking lever, which is formed with a bending portion 18a and an arm portion 18b, is pivotally supported by a shaft 19, and is given left-handed rotation by a spring 20;
The pin 14d contacts and is restrained. Reference numeral 21 denotes a release lever, which is formed with bent portions 21a and 21b, is pivotally supported by the shaft 15, and is given right-handed rotation by a spring 22; It is closely suppressed. Note that the release lever 21 constitutes a part of the winding prevention lever 14. 23 is an electromagnetic device including a permanent magnet, and has an iron core 23a. Reference numeral 24 denotes an iron piece lever, on which an iron piece 24a is pivotally mounted, and a levorotatory driving force is applied by a spring 25, and the iron piece 24a is attracted to the iron core 23a, which is excited by a permanent magnet. has been suppressed. 26 is a set lever, which includes an operating arm portion 26a and a hook portion 26b.
is formed, is pivotally supported on a shaft 27, and is held in the state shown in the figure by well-known means.

Next, the operation of the above configuration will be explained.

First, since the control circuit does not operate when the lens barrel 3 is housed as shown in FIG. 1, the release button is prevented from being pressed down.

Furthermore, even if you try to turn the set lever 26 to the left from this state, the hook portion 26b
Since it engages with a, double winding of the film is prevented.

Therefore, when photographing, it is first necessary to pull out the lens barrel 3 from the camera body 1 as shown in FIG. 2, and this operation connects the control circuit. In conjunction with this pulling out operation of the lens barrel 3, the bent portion 18a is pushed, the lens barrel interlocking lever 18 is rotated to the right, and the arm portion 18b is moved to the pin 14d.
Evacuate from within the movement trajectory.

In the state shown in FIG. 2, double winding of the film is similarly prevented, but the shutter button can be pressed down. When the shutter button is pressed down, the electromagnetic device 23 is energized and the iron core 23a is demagnetized, and as a result, the iron lever 24 turns to the left to release the shutter.

Then, the bent portion 21a is pushed by the counterclockwise rotation of the iron piece lever 24, and the release lever 21 and the winding prevention lever 14 are integrally rotated to the left by the connection of the spring 22. As a result, the hook portion 14a becomes the hook portion 26.
Since it is retracted from the movement locus b, the film can then be wound.

Therefore, after photographing is completed, by operating the set lever 26 and turning it to the left, the film is wound and the shutter is set. When the shutter is set, the iron piece lever 24 turns to the right again, and the iron piece 24a is moved to the iron core 2.
3a and is suppressed. As the iron lever 24 rotates to the right, the wind-up prevention lever 14 and the release lever 21 attempt to restore their right-handed rotation by the spring 16, but this is inhibited since the arm portion 14c is in contact with the set lever 26. Thereafter, by turning the set lever 26 clockwise to restore it, the winding prevention lever 14 and the release lever 21 are rotated clockwise by the spring 16 and restored to the state shown in FIG. 2.

Next, the film loading operation will be explained.

As shown in FIG. 3, loading of film is carried out by first opening the back cover 2. Then, by opening the back cover 2, the film counter feed lever 4
The restraint is released and it slides by the spring 7. Depending on this sliding movement, the first interlocking lever 8 follows and rotates to the left, and the second interlocking lever 11 follows and rotates to the right. By turning the second interlocking lever 11 to the right, the arm portion 11a pushes the pin 14d, causing the winding prevention lever 14 to turn to the left, and at the same time, the pin 14d
pushes the arm portion 18b and rotates the lens barrel interlocking lever 18 to the right. Then, by turning the winding prevention lever 14 to the left, the hook portion 14a is retracted from the operating locus of the hook portion 26b, and the film can be wound. Further, by turning the winding prevention lever 14 to the left, the bent portion 21b is pushed, and the release lever 21 also turns to the left. Incidentally, the film counter feed lever 4 then comes into contact with the stopper 17 and stops.

Therefore, as is clear from the state shown in Figure 3, the back cover 2
In the open state, the winding prevention lever 14 cannot act on the set lever 26. Further, this winding prevention lever 14 is no longer related to the action of the iron piece lever 24.

As a result, film winding for film loading is performed by continuously operating the set lever 26, without the need to press down the shutter button. Of course, even if you press the shutter button in the state shown in Figure 3, the lens barrel 3 is retracted and the release is locked, so it will not be possible to push it down. Even if the shutter button is pulled out and the shutter button can be pressed down, there is no need to press the shutter button down.

On the other hand, the shutter is set only once by continuous operation of the set lever 26, but thereafter it is not affected by the operation of the set lever 26.

When the camera back 2 is closed after winding the film by operating the set lever 26 two or three times, the film counter feed lever 4 is pushed and restored.
Each member is sequentially restored to the state shown in FIG.

Therefore, the set lever 26 cannot be operated until after the lens barrel 3 has been pulled out as shown in FIG. 2, the shutter button has been pressed, and photography has been completed.

Another feature of the present invention is that the film cannot be wound even when the lens barrel 3 is housed as shown in FIG. In other words,
This is because the lens barrel interlocking lever 18 pushes the pin 14d and inhibits the winding prevention lever 14.

Therefore, after the shooting is completed, the iron piece lever 24,
Even if the release lever 21 and the winding prevention lever 14 are turned to the left and the double winding prevention is released, when the lens barrel 3 is sunk from this state, the winding prevention lever 14 will be turned to the right as described above. As a result, it becomes impossible to turn the set lever 26 to the left. This is to prevent the set lever 26 from malfunctioning when the camera is being carried in a collapsed state in a pocket or the like.

Since the present invention is constructed as described above, the film winding prevention is released as soon as the back cover is opened, and film winding during film loading can be carried out continuously without being separated from the operation of the shutter button.

Furthermore, in a collapsible camera, the film winding prevention member acts to prevent film winding when the camera body is collapsed, but when the camera back is opened, the film winding prevention member is released even when the camera body is collapsed. By linking the winding prevention member with the operation of taking out and taking out the lens barrel and the operation of opening and closing the camera back, the set lever will not operate even if an external force is accidentally applied to the set lever while the camera is being carried in the retracted state, thereby preventing malfunctions. This has the advantage that even if the shutter mechanism is in a retracted state and the shutter mechanism cannot operate, it is still possible to load film by opening the camera back.

[Brief explanation of the drawing]

FIG. 1 is a plan view of an embodiment of the present invention, FIG. 2 is an explanatory diagram of the operation of FIG. 1, and FIG. 3 is an explanatory diagram of the operation in another state of FIG. 1. 2... Back cover, 3... Lens barrel, 4... Film counter feed lever, 8... First interlocking lever, 11... Second interlocking lever, 14... Winding prevention lever, 18... Mirror Torso interlocking lever, 21...
...Release lever, 24... Iron piece lever, 26... Set lever.

Claims (1)

[Scope of Claim for Utility Model Registration] This is a collapsible camera in which the lens barrel can be stored in the camera body, and when the shutter is set, the winding prevention member is displaced to a position where it can prevent the film winding and setting member from operating. In a camera in which the winding of the film is prevented, and the winding of the film is made possible by retracting the winding preventing member from the position where it can be prevented in conjunction with the release operation of the shutter, The lens barrel interlocking member is linked to the protruding and retracting movements, and the winding prevention member takes a non-inhibiting position where it can be displaced to the above-mentioned retracted position by the protruding movement of the lens barrel, and when the camera back cover is closed, the lens barrel The film winding prevention member is placed in a restraining position for restraining the film winding prevention member to the film winding prevention position by storing the cylinder, and the camera back lid interlocking member is interlocked with the opening/closing operation of the camera back cover, and the lens barrel interlocking member is and a mechanism for displacing the winding prevention member to the retracted position by opening the camera back cover regardless of the position, and when the lens barrel interlocking member is in the restraining position, the camera By the opening operation of the camera back, the camera back interlocking member displaces the winding prevention member to the retracted position and displaces the lens barrel interlocking member to the non-inhibiting position, thereby determining whether the lens barrel is in the protruding or retracting state. An empty film winding device for loading film in a camera, characterized in that by opening the camera back cover, the film can be wound continuously without shutter release operation.