JPH0440193Y2 - - Google Patents

Description

[Detailed Description of the Invention] (Technical Field) The present invention relates to an improvement in a barrier opening/closing device for opening/closing a protective barrier that shields the front surface of a photographic lens for a camera.

(Background Art) Conventionally, this type of barrier opening/closing device has used the pressing force of a release button to open/close a protective barrier provided on the front surface of a lens. For this reason, operating the release button was difficult and caused camera shake.
Additionally, if you accidentally press the release button while pressing the protective barrier with your finger, there is a problem in that unreasonable force will be applied to the internal mechanism for opening and closing the protective barrier.

(Purpose of the invention) Therefore, the purpose of the invention is to provide an improved barrier opening/closing device in which the release operation is easy and there is no fear of camera shake, and furthermore, no load is applied to the internal mechanism from the protective barrier side.

(Structure of the Invention) In order to achieve the above object, the barrier opening/closing device according to the present invention has a protective barrier that protects a photographing lens of a camera between a shielding position that protects the photographing lens and a retracted position that allows photographing with the photographic lens. In the barrier opening/closing device, the barrier opening/closing device is configured to include a first biasing means for moving the protective barrier to a retracted position, and a biasing force which is normally weaker than the biasing force of the first biasing means, and when the protective barrier is restricted, a second biasing device that becomes stronger than the biasing force of the first biasing device to move the protective barrier to the shielding position; and a second biasing device that regulates the second biasing device at the initial set position, and a release signal. The camera comprises a running member that starts running and releases the restriction, and opens the shutter of the photographing lens in the final range of travel, and a setting means that returns and sets the traveling member to an initial setting position after photography is completed. has been done.

According to the above structure, the object of the present invention can be completely achieved.

(Example) Hereinafter, the present invention will be explained in more detail with reference to the drawings and the like.

FIG. 1 is a mechanical diagram showing an embodiment of the barrier opening/closing device according to the present invention, in which FIG. 1a is a front view and FIG. 1b is a partial sectional view.

The running member 1 is a plate-like member, and includes long hole portions 1a and 1b, a rack portion 1c, a locking portion 1d, and a bent portion 1.
e, and a protrusion 1f.

The long holes 1a and 1b are pins 1 planted in the fixed part.
2, 13 and can move left and right,
Normally, it is biased to the left in FIG. 1A by a spring 14.

The rack portion 1c meshes with a pinion gear 2a of the governor 2. The governor 2 is used to reduce the moving speed of the traveling member 1 and control it to travel at a constant speed.

The engaging portion 1d engages with the hook claw 3a of the hook 3. The hook 3 is pivotally supported by a shaft 3b and has a suction portion 3c. A relay 4 is provided opposite the suction portion 3c. Relay 4 is a relay that is energized by a release signal.

The bent portion 1e is a portion that restricts the spring 7 and applies a biasing force when the traveling member 1 is locked with the hook 3. At this time, the spring 7 biases the protective barrier 5 to rotate counterclockwise. The protective barrier 5 is for protecting the photographic lens 15 from dust and the like. Protective barrier 5
As shown in FIG. 1B, it is pivoted on the shaft 5a and rotates between the position shown by the solid line where it shields the lens 15 and the position shown by the chain line where it can take pictures. Protective barrier 5
is biased clockwise by spring 6, which is weaker than spring 7. The spring 6 is a spring for opening the protective barrier 5. The pin 16 is a member for regulating the right rotation end of the protective barrier 5.

The protrusion 1f engages with a pin 8c set on the set lever 8. The set lever 8 is a lever for setting the traveling member 1. The set lever 8 is biased counterclockwise by a spring (not shown),
It rotates around the axis 8d. A pin consisting of a large diameter portion 8a and a small diameter portion 8b is implanted in the center of the set lever 8. The large diameter portion 8a engages with the cam 9. The cam 9 is provided coaxially with the gear 10a. The rotation of the motor 18 is connected to the gear train 1 in the gear 10a.
0. The motor 18 is a motor for driving a camera motor.

A rewind button 11 is a button for instructing rewinding of the film. By moving the rewind button 11 in the direction of the arrow, the motor 18 is reversely rotated and the film is rewound by a rewind mechanism (not shown). The rewind button 11 has a protruding portion 11a that is attached to the small diameter portion 8 of the set lever 8.
When the traveling member 1 is engaged with a and moved to the right,
No matter where it is stopped, it will be set to the set position. The reason for operating this way is that the motor 16
This is to separate the large diameter portion 8a from the cam 9 so that the cam 9 can rotate in the reverse direction to rewind the film.

Next, the operation of the embodiment of the barrier opening/closing device according to the present invention will be explained.

Normally, the protective barrier 5 shields the lens 15 in the state shown in FIG. 1a. At this time, even if the protective barrier 5 is opened and closed from the outside, no load is applied to the internal mechanism because it is only biased by the springs 6 and 7.

When a release button (not shown) is pressed, the relay 4 is energized, attracts the suction portion 3c of the hook 3, and rotates the hook 3 clockwise. Therefore, the engagement between the hook pawl 3a of the hook 3 and the engaging portion 1d of the running member 1 is released, and the running member 1 starts running to the left due to the biasing force of the spring 14.

As the traveling member 1 travels, the bent portion 1e is moved by the spring 7.
Since the protective barrier 5 is no longer restricted, the protective barrier 5 is rotated clockwise by the biasing force of the spring 6 and reaches the photographing position shown by the chain line. At the same time, the traveling member 1 moves to the left end, releases a hook (not shown), and opens the shutter.

After photographing, the motor 18 rotates in the forward direction through gear train 1.
0, rotate the cam 9 clockwise. As the cam 9 rotates, the set lever 8 is rotated clockwise by the large diameter portion 8a serving as a follower. The pin 8c at the tip of the set lever 8 moves the traveling member 1 to the right, and the bent portion 1e restricts the spring 7 to rotate the protective barrier 5 counterclockwise. At this point, the photographing lens 15 is shielded again. Further, when reaching the right end, the relay 4 is no longer energized, so the hook 3 rotates counterclockwise, and the hook pawl 3a engages with the locking portion 1d of the running member 1, returning to the initial state.

Note that the protective barrier 5 may be transparent or opaque, but it is convenient if it is transparent because fogging of the photographic lens 15 can be seen from the outside. In addition, if the protective barrier 5 is used as a filter and a stopper that is manually moved forward and backward is provided in its rotation range and locked,
The shutter is turned off while the protective barrier 5 is closed, and a photograph with a filter effect can be taken.

(Effects of the invention) As explained in detail above, according to the invention,
Since the running member opens the protective barrier and turns off the shutter, the release operation is light and there is no need to worry about camera shake. Furthermore, since the protective barrier is opened and closed via two springs, no load is applied to the internal mechanism even if the protective barrier is stopped from the outside during the opening/closing operation.

[Brief explanation of the drawing]

FIG. 1 is a mechanical diagram showing an embodiment of the barrier opening/closing device according to the present invention, in which FIG. 1a is a front view and FIG. 1b is a partial sectional view. 1... Running member, 1a, 1b... Long hole part, 1c
...Rack portion, 1d...Locking portion, 1e...Bending portion, 1f...Protruding portion, 2...Governor, 2a...Pinyon gear, 3...Hook, 3a...Hook pawl,
3b...Shaft, 3c...Adsorption part, 4...Relay, 5
...protective barrier, 5a...shaft, 5b, 5c...
Pin, 6, 7... Spring, 8... Set lever, 8
a... Large diameter part, 8b... Small diameter part, 8c... Pin,
8d... shaft, 9... cam, 10... gear train, 10
a... Gear, 11... Rewind button, 12, 13...
Pin, 14... Spring, 15... Shooting lens, 1
6, 17...pin, 18...motor.

Claims (1)

[Scope of utility model registration request] In a barrier opening/closing device that opens and closes a protective barrier that protects a photographic lens of a camera between a shielding position that protects the photographic lens and a retracted position that allows photographing with the photographic lens, a first step that moves the protective barrier to the retracted position is provided. 1 biasing means, which is normally weaker than the biasing force of the first biasing means, but becomes stronger than the biasing force of the first biasing means when restricted, and moves the protective barrier to the shielding position. The second biasing means is regulated at the initial set position, and the second biasing means is regulated at the initial set position, and when the release signal is used to start running, the regulation is released, and at the final range of the traversal, the above-mentioned photographing is performed. 1. A barrier opening/closing device comprising: a running member for opening a shutter of a lens; and a setting means for returning and setting the running member to an initial setting position after photographing is completed.