JPH10312012A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent the occurrence of double exposure during unwinding by executing winding/unwinding operations with one knob. SOLUTION: When a reverse rotation stopping lever 4 is in a first position, a reverse rotation stopping pawl 4a is engaged with a winding knob 2, to make it rotatable only counterclockwise and a take-up shaft 3 rotates linked with the winding knob 2, to take up a film. When a unwinding button 5 is depressed to make an operative state and the reverse rotation stopping lever 4 is rocked, that is, a second position is obtained, a reverse rotation stopping pawl 4b is engaged with the winding knob 2, to make it rotatable only clockwise, so that linkage with the take-up shaft 3 is stopped and the film is unwound by the rotation of the knob 2. For returning the unwinding button 5 into an inoperative state, an operating lever 11 is rocked to release the engagement of a restraining part 12a provided on the shaft of the operating lever with an elastic locking arm 5d.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a low-cost camera, and more particularly to a camera which can be manually wound and rewinded.

[0002]

2. Description of the Related Art Conventionally, there is a low-priced camera, that is, a so-called lens-equipped camera, which does not include a device for automatically winding a film using a motor or an automatic focusing device and manually winds the film. . This camera is a disposable camera. In order to simplify the mechanism, a film that has been wound in advance is rewound frame by frame by a rewind knob. Also,
In the case of a manual camera capable of changing a film, a winding knob and a rewinding knob are separately provided.

[0003]

A camera that winds or rewinds a film using a motor has a neat appearance because it is not necessary to provide a winding knob or a rewind knob on the outer frame of the camera. A so-called disposable camera does not need to change the film, so it is only necessary to provide a rewind knob.However, for a camera that can change the film, the film is manually wound, etc. It was provided and its appearance was not that clean.

[0004]

In order to solve the above-mentioned problems, a camera according to the present invention is provided with a rotation direction regulating member.
One knob was wound up and rewinded. After the rewind is activated, unless the operation is released via the parts used when removing the film cartridge,
The structure is such that film exposure is disabled.

[0005]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention relates to a camera for manually winding and rewinding a film, wherein a film winding knob, a film winding shaft, a rotation direction regulating member, and a driving member for driving the rotation direction regulating member are provided. And a regulating member driving section. When the rotation direction regulating member is at the first position, the winding knob is rotatable only in one direction, and the winding shaft is rotated in conjunction with the rotation of the winding knob to wind the film. Further, when the rotation direction regulating member is at the second position by the regulating member drive section, the winding knob can be rotated only in the opposite direction, the interlock with the winding shaft is cut off, and the film is rotated by the rotation of the winding knob in the opposite direction. Is performed. Further, an operation lever for locking the lid of the film cartridge storage section of the camera is provided. A mechanism for holding the operating state of the regulating member drive section is provided between the regulating member drive section and the operation lever. To make the regulating member drive section inactive, swing the operation lever. The operation is performed by releasing a mechanism for holding the operating state of the regulating member driving unit. In the camera configured as described above, the operation is simplified by operating the same knob for winding and rewinding, and the operation state of the rewinding operation is performed using parts used when removing the film cartridge. By releasing, it works so that double exposure is not performed during rewinding.

[0006]

Embodiments will be described with reference to the drawings.
As shown in FIGS. 1 and 2, the middle plate 1 a of the camera case 1
Supports the following mechanism. In the film cartridge storage part provided inside the case (not shown),
The film cartridge C is inserted by opening a lower cover (not shown). The film F is pulled out from a slit formed on a side surface of the film cartridge C, and photographing is performed for each frame. A hoisting knob 2 is rotatably disposed at the right position in FIG. 1, and the teeth 2 a on the outer periphery of the hoisting knob 2 slightly protrude from the upper rear surface of the case 1, and can be operated by a user. The winding shaft 3 is disposed at the left position in FIG. 1, and the rotation of the winding knob 2 is transmitted to the winding shaft 3 via a transmission wheel train W in FIG. A gear 3 a is provided at the upper end of the winding shaft 3.

[0007] One of a pair of anti-reverse pawls 4a, 4b extending from one end of a reverse-reverse lever 4, which is a rotation direction regulating member, is engaged with the tooth portion 2a of the winding knob.
The reverse rotation preventing lever 4 is pivotally supported by a pin 4c erected on the middle plate 1a so as to be swingable.
Is provided. One end (the lower end in FIG. 1) of the rewind button 5, which is a regulating member driving unit that drives the reverse rotation prevention lever 4,
The case 1 is disposed in an exposed state and can be operated by a user. The connection pin 5a protruding from the upper surface of the rewind button 5 is fitted in the connection groove 4d of the reverse rotation preventing lever, and transmits the movement of the rewind button 5 to the reverse rotation preventing lever 4. From the rewind button 5, the arm 5b
The arm 5c extends upward and the elastic locking arm 5d extends rightward.

A release lever 6 is located above the rewind button 5 in FIG. The release lever 6 is shown in FIG.
A pressing operation of a release button (not shown) is transmitted to the tip of the arm 6a extending upward from the right end, and is swingable by a shaft 6c vertically provided on the lower surface of the tip of the arm 6b extending downward from substantially the same position. It is pivoted. A spring 7 is wound around the shaft 6c, and a biasing force in a counterclockwise direction is applied to the release lever 6. A pin 6d protrudes from the upper surface near the base of the arm 6b, and can be engaged with the tapered end surface of the arm 5c of the rewind button 5. A claw-shaped protrusion 6e is provided downward from an intermediate portion of the release lever 6. Further, a protruding piece 6f is provided downward to the left of the protruding portion 6e, and a locking claw 6g is provided at the left end portion. The locking claw is provided on the gear 3 of the film winding shaft 3.
a.

A shutter lever 8 is located to the left of the rewind button 5 in FIG. The shutter lever 8 is pivotally supported by a shaft 8a vertically provided on a lower surface of a base portion thereof. A spring 9 is wound around the shaft 8a, and a clockwise urging force is applied to the shutter lever 8. I have. The tip of the arm extending above the shutter lever 8 is a shutter driving unit 8b
A locking projection 8c is provided on the upper surface of the intermediate portion of the arm so as to project therefrom, and can be locked with the projection 6e of the release lever 6. Arm 8d rightward below locking projection 8c
Is extended, and the arm 5b of the rewind button 5 can be locked at the tip of this arm. Further, an arm 8e extends leftward from the base of the shutter lever 8.

A shaft 10 is rotatably supported on the left side of the shutter lever 8 in FIG. 1, and a pin 10a1 is provided at the lower end of the shaft 10 to protrude into the percolation of the film F. The vehicle 10a is stuck. A cam 10b is provided at an intermediate portion of the shaft 10, and the cam 10b has three cam surfaces which are smoothly curved toward the outer periphery and are formed at equal intervals. The arm 8e of the shutter lever 8 can be locked on each cam surface of the cam 10b. Another cam 10c is provided on the cam 10b,
The cam 10c has a shape in which three fan-shaped cam surfaces are positioned around an axis with a predetermined gap therebetween, and the tip of the protruding piece 6f of the release lever 6 is formed between the fan-shaped cam surface and the gap between the cam surfaces. Can be hit.

An operation lever 11 for locking the lid of the film cartridge storage portion is provided so as to protrude from the bottom surface of the camera case 1, and a shaft 12 serving as a swing center thereof extends toward the upper surface of the case. A gear 13 is fixed to the protruding end. The gear 13 drives a gear train (not shown) for performing an operation of closing the light shielding cover of the film F by operating the operation lever 11 when removing the film cartridge C.

Between the shaft 12 and the rewind button 5, there is provided a mechanism for holding the operation state of the rewind button.
The operation state of the rewind button 5 is a state in which the rewind button 5 is depressed and a state in which the rewind operation of the film F is performed. Further, the inoperative state of the rewind button 5 is a state in which the rewind button is returned, and is a state in which a film winding operation is performed. The mechanism for holding the operating state is provided with a locking portion 12a at the upper end of the shaft 12, and a distal end of an elastic locking arm 5d provided on the rewind button 5 engages with the locking portion 12a. The rewind button 5 is kept pressed.

FIG. 3 shows an example of a train wheel when the film F is wound up. In a transmission train W extending from the gear 20 of the winding knob 2 to the gear 3a of the winding shaft 3, a gear 21 for rotating the film shaft of the film cartridge C, and switching for switching the rotation direction of the gear 21 forward and reverse. Means 22 and clutch means 23 for cutting off the transmission of rotation of the winding shaft 3 to the gear 3a are provided.

The structure of the switching means 22 includes a central gear 22a.
Two arms are provided on the center axis of the arm so as to be swingable, and pinions 22b and 22c are rotatably supported at the ends of the respective arms. Both pinions are always meshed with the center gear 22a, and the pinion meshed with the gear 21 is switched according to the rotation direction of the center gear 22a. In FIG. 3, the gear 20 is rotated counterclockwise (when the film is wound).
Is transmitted to the gear 21, the center gear 22a rotates clockwise, so that the pinion 22
b meshes with the gear 21 and rotates counterclockwise, so that clockwise rotation is transmitted to the gear 21. Conversely, when the gear 20 is rotated clockwise (during film rewind), the center gear 22a rotates counterclockwise,
Since the pinion 22c meshes with the gear 21 and rotates clockwise, the counterclockwise rotation is transmitted to the gear 21.

The structure of the clutch means 23 is as follows.
An arm is swingably provided on the center axis of a, and a pinion 23b is rotatably supported at the tip of the arm. The pinion 23b is always meshed with the center gear 23a, transmits rotation to the gear 3a via another gear in the train, and rotates the winding shaft 3 clockwise during film winding. When the film is rewound, the center gear 23a of the clutch means 23 rotates clockwise, so that the pinion 23b moves rightward and separates from the next gear, so that the rotation is not transmitted to the gear 3a, and the film is rewound. The shaft 3 is in a free state.

The normal state shown in FIG. 1 is when the wind-up button 5 is in the inoperative position and the reverse rotation preventing lever 4 is in the first position, and the film F is wound up one frame at a time and photographed. It is the state at the time. To briefly describe the operation at this time, the hoisting knob 2 is rotated counterclockwise,
When the film moves to the left by rotating the gear 21 of the film shaft and the winding shaft 3 clockwise, the pin wheel 10a fitted to the percolation of the film rotates clockwise, and the cam 10b and the arm The shutter lever 8 swings counterclockwise through 8e, the spring 9 is tightened, and the spring force is charged. When the shutter lever 8 swings counterclockwise, the locking projection 8c gradually becomes
e, the release lever 6 tries to swing counterclockwise due to the spring force of the spring 7 at the moment when it comes off,
The protruding piece 6f abuts on the cam surface of the cam 10c, and the position is maintained. At this time, the locking claw 6g has not yet meshed with the gear 3a. When the shutter lever 8 further rotates as the film moves, the protruding piece 6f falls into the gap between the cams 10c due to the spring force of the spring 7, whereby the locking claw 6g meshes with the gear 3a and the film winding shaft 3 Prevent rotation. This position is the position where the film is wound up by exactly one frame. In this position, the right end face of the locking projection 8c is the projection 6e.
, The shutter lever 8 is held at that position against the urging force of the spring 9.

Next, when the release button is pressed, the arm 6a is released.
Descends and the release lever 6 swings clockwise,
The protrusion 6e moves upward to disengage the engagement projection 8c from the end face at the end face, whereby the shutter lever 8 becomes free, and the original position of FIG. Return to. At this time, the shutter is operated by the shutter drive unit 8b to operate a shutter operation unit (not shown), and the photographing is performed. This operation is repeated, and film winding and photographing are repeated.

At the end of shooting and rewinding the film,
As shown in FIG. 4, the rewind button 5 is pressed and moved upward. As a result, the connecting pin 5a and the arms 5b and 5c move upward, swing the reverse rotation preventing lever 4 clockwise, remove the reverse rotation preventing claw 4a from the tooth portion 2a of the hoisting knob 2, and release the shutter lever via the arm 8d. The arm 8e is swung counterclockwise to retract the arm 8e from the cam 10b.
Also, the release lever 6 is swung clockwise by pushing the pin 6d upward. The state shown in FIG.
Is moved sufficiently upward to be in the operating state, and when the reverse stop lever 4 is in the second position,
The reverse rotation preventing claw 4a is disengaged from the tooth portion 2a of the winding knob 2, and the reverse rotation preventing claw 4b meshes with the tooth portion 2a, so that the winding knob 2 can rotate only in the reverse rotation direction (clockwise). In addition, the distal end of the elastic locking arm 5d of the rewind button 5 is locked to the locking portion 12a, and the operation state of the rewind button 5 is maintained. In this state, the release lever 6 is held at the position pivoted clockwise by the movement of the pin 6d being blocked by the arm 5c, and the shutter lever 8 is stopped by the movement of the arm 8d being blocked by the arm 5b. The pin wheel 10a and the take-up shaft 3
Becomes free.

If the winding knob 2 is rotated clockwise as described above, the film F can be rewound into the film cartridge C. When the rewinding is completed, the rewinding button 5 is returned to the inoperative state.
This returning operation is performed at the same time when the film cartridge C is taken out. That is, as shown in FIG. 6, when the operation lever 11 is swung clockwise in order to unlock the lid of the cartridge accommodating portion in order to take out the film cartridge C, the locking portion 12a is elastically moved by the rotation of the shaft 12. Since the locking arm 5d is disengaged from the locking position, the mechanism for holding the operation state of the rewind button 5 is released, so that the clockwise spring force of the spring 9 of the shutter lever 8 and the spring 7 of the release lever 6 are released. Counterclockwise spring force acts together to exert a downward force on the rewind button 5. This lowering causes the anti-reverse lever 4 to pivot counterclockwise to release the anti-reverse pawl 4b from the tooth 2a of the hoisting knob 2 (FIG. 7), and to engage the anti-reverse pawl 4a with the tooth 2a (FIG. 7). 8) The winding knob 2 is rotatable in the winding direction (counterclockwise). In the state of FIG.
This is a position where the film F is swung clockwise by 40 degrees. During this swing, the light-shielding cover of the film F is closed by a train (not shown). Therefore, the lid of the storage unit may be opened and the film cartridge C may be taken out.

After the next film cartridge C is inserted, the cover of the film cartridge storage section is closed and the operation lever 11 is swung counterclockwise. 1 can be wound.

[0021]

The rotation direction regulating member is moved to the first position and the second position.
, The film can be wound and rewound only by switching the rotation direction of one winding knob, thereby simplifying the operation. A mechanism for holding the operating state is provided in the regulating member drive unit, and the operating lever that locks the lid of the film cartridge storage unit is used to make it inoperative, so that exposure can be performed in the inoperative state Since the rewinding operation is performed in the operating state, the exposure is not performed while the rewinding operation is performed without swinging the operation lever, so that double exposure can be eliminated.

[Brief description of the drawings]

FIG. 1 is a plan view of a main part showing one embodiment of the present invention.

FIG. 2 is a front view of FIG.

FIG. 3 is a reduced plan view for describing a train of film winding and rewinding.

FIG. 4 is a plan view showing a state where a rewind button is slightly pressed to rewind the film.

FIG. 5 is a plan view of the operation state in which the rewind button is completely depressed from FIG. 4;

FIG. 6 is a plan view showing a state in which the operation lever is slightly swung to return the rewind button.

FIG. 7 is a plan view showing a state in which the operation lever is further swung from FIG. 6;

FIG. 8 is a plan view showing a state in which the operation lever is completely swung and the rewind button has returned to an inoperative state.

[Explanation of symbols]

2 Winding knob 3 Winding shaft 4 Rotation direction regulating member (reverse stop lever) 5 Regulation member drive unit (Rewind button) 11 Operating lever 5d, 12a Mechanism (elastic locking arm, Locking part) F film

Claims (2)

[Claims] 1. A camera for manually winding and rewinding a film, comprising: a film winding knob, a film winding shaft, a rotation direction restriction member, and a restriction member drive unit for driving the rotation direction restriction member. When the rotation direction regulating member is at the first position, the winding knob is rotatable only in one direction, and the winding shaft is rotated in conjunction with the rotation of the winding knob to rotate the winding shaft. Winding is performed, and the rotation direction regulating member is moved to the second position by the regulation member driving section.
When in the position, the winding knob is rotatable only in the opposite direction, the interlock with the winding shaft is cut off, and the film is rewound by rotating the winding knob in the opposite direction. Camera. 2. The control member according to claim 1, further comprising an operation lever for locking a lid of the film cartridge accommodating portion of the camera, wherein the control member drive portion is provided between the control member drive portion and the operation lever. A mechanism for holding the operating state is provided, and the restricting member driving unit is set to the inoperative state by swinging the operation lever to release the mechanism for holding the operating state of the restricting member driving unit. A camera characterized in that it is performed.