JP2002006376A - Safety operating mechanism for camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To inhibit a cartridge loading cover from being opened by inadvertent operation in the midst of driving a feeding motor for feeding photographic film. SOLUTION: When the feeding motor 28 is driven, a driving force responding device 50 and a displacement switching mechanism part 60 are driven through a driving force transmitting part 40. When the motor 28 is normally rotated, the turning lever abutting part 64a of the mechanism 60 abuts on an interlocking ring locking part 36c and prevents the turning of an interlocking ring 36. Thus, the turning of a lock lever 34 engaged with the ring 36 is also prevented, so that the locking of the cartridge loading cover 22 is not released. When the motor 28 is reversely rotated, the turning lever abutting part 54a of the device 50 similarly abuts on the locking part 36c and prevents the turning of the ring 36, so that the locking of the cover 22 is not released.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a safety operation mechanism for a camera, and more particularly to a safety operation mechanism for a camera in which a cartridge loading lid cannot be unlocked while a film feeding motor is rotating. It is.

[0002]

2. Description of the Related Art A cartridge loading chamber of an APS camera (hereinafter, camera) using an IX240 cartridge (hereinafter, film cartridge) is provided with a cartridge loading lid for opening and closing the cartridge. In the film cartridge, the photo film is wound around the spool to the leading end and stored, and the film entrance for feeding and rewinding the photo film is light-tightly closed by a light shielding cover.

When a film cartridge is loaded into the cartridge loading chamber and the cartridge loading lid is closed, the inside of the cartridge loading chamber is shielded from light. Then, the cartridge loading lid is locked at the closed position so as not to be opened carelessly, and the light shielding lid of the film cartridge is opened. A spool driver connected to a feed motor built in the camera is provided in the cartridge loading chamber, and the spool driver rotates the spool in the forward direction to feed the photographic film from the film cartridge. And
When all the frames have been shot or when the rewind operation is performed, the spool is rotated in the reverse direction by the spool driver, and the photographic film is rewound into the film cartridge.

After the photographic film is completely rewound into the film cartridge, the spool driver continues to rotate in the reverse direction. And, by the display plate built into the film cartridge so as to rotate integrally with the spool,
The display of the film cartridge is switched to any one of “unused”, “used partway”, and “all frames shot”. This display switching is called VEI processing, and after this processing ends, the rotation of the spool driver stops.

To remove the film cartridge, an unlocking opening / closing member provided outside the camera is operated. When the opening / closing operation member is displaced, the light-shielding lid of the film cartridge is closed, the lock of the cartridge loading lid is released, the cartridge loading chamber is opened, and the film cartridge can be taken out.

In the above-mentioned camera, the photographic film is rewound. When all the photographic films are wound in the film cartridge, the operation sound of the feeding motor changes, and the film counter returns to "0". Therefore, there is a possibility that the user thinks that the rewinding of the photo film is completed and erroneously releases the lock of the cartridge loading lid. However, even after the photographic film has been wound into the film cartridge, the spool driver continues to rotate to perform VEI processing. If the cartridge loading lid is opened during this VEI processing, the VEI processing is interrupted and the There is a problem that the use state of the can not be displayed properly. In addition, if the light-shielding cover that opens and closes the film entrance is closed before the photo film is completely wound into the film cartridge, not only will the photo film be damaged,
The light-shielding lid may be damaged.

To cope with such a problem, US Pat. No. 5,713,057 discloses a technique disclosed in Japanese Patent Application Laid-Open No. 9-2115.
No. 96, Japanese Unexamined Patent Publication No. Hei 10-17109, etc., a film sensor for palpating the edge of the film is provided.
Opening the cartridge loading lid is prohibited when the film is out of the film cartridge, or while the drive signal is being supplied to the film feed motor, the locking solenoid is driven to open the cartridge loading lid. Techniques for prohibiting operation are known.

[0008]

However, as described above, since the VEI process is continuously performed even after the entire film is wound in the film cartridge, the provision of the film sensor alone achieves the intended purpose. I can't get it. In the case of driving the solenoid for locking while the drive signal is supplied to the feed motor, it is necessary to obtain a signal for driving the solenoid from a CPU or a motor drive circuit that controls the drive of the feed motor. In addition, since the solenoid is continuously driven while the feed motor is being driven, there is a problem in that the cost increases due to the complexity of the CPU and the circuit configuration, and power consumption due to the continuous drive of the solenoid.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and does not complicate the drive circuit of the CPU or the feeding motor at all and does not involve excessive power consumption. It is an object of the present invention to provide a camera safety operation mechanism capable of appropriately controlling the opening and closing of the light shielding cover.

[0010]

In order to achieve the above object, a safety operation mechanism for a camera according to the present invention is provided so as to be connected to a driving force transmitting portion of a feeding motor, and is mechanically driven by the driving force of the feeding motor. A drive force responding device that generates displacement and a displacement switching mechanism that switches the displacement direction in accordance with the rotation direction of the feed motor, and a lock member that is displaced between a position where the cartridge loading lid is locked and a position where the cartridge loading lid is unlocked. When the feed motor rotates in one direction, the displacement switching mechanism is displaced to hold the lock member in the lock position, and when the feed motor rotates in the other direction, the driving force response device displaces and locks the lock member. It is held at the lock position.

In a safety operation mechanism of a camera for prohibiting a closing operation of a light shielding cover for opening and closing a film entrance of a film cartridge while the feeding motor is being driven, the feeding operation is provided in connection with a driving force transmitting portion of the feeding motor. A driving force responding device that generates mechanical displacement by the driving force of the feed motor, a displacement switching mechanism that changes the direction of displacement in accordance with the rotation direction of the feed motor, and light shielding that displaces the light shielding cover between an open position and a closed position. A cover opening / closing member, wherein when the feed motor is rotated in one direction, the displacement switching mechanism is displaced to hold the light blocking cover opening / closing member in an open position, and when the feed motor is rotated in another direction, the driving force is The response device is displaced to hold the light blocking cover opening / closing member in the open position.

Further, a driving force responding device which is provided in connection with the driving force transmitting portion of the feeding motor and generates a mechanical displacement by the driving force of the feeding motor, and a displacement whose displacement direction switches according to the rotation direction of the feeding motor. A switching mechanism, an opening / closing operation member for unlocking the cartridge loading lid from outside the camera, and a film detecting mechanism for detecting the film by being displaced by coming into contact with the film, and prohibiting the unlocking of the cartridge loading lid in the film detection state. When the feed motor rotates in one direction, the displacement switching mechanism is displaced to hold the opening / closing operation member or the film detecting mechanism in the lock position, and when rotating the feed motor in the other direction, The driving force responding device is displaced to hold the opening / closing operation member or the film detecting mechanism in the lock position.

The driving force responding device is displaced by the continuous rotation driving force of the feed motor being transmitted through the fluid, and is generated by the continuous rotation of the feed motor. It is displaced by the electromagnetic force generated.

[0014]

FIG. 1 is a perspective view of a camera embodying the present invention as viewed from the back. Film cartridge 1
Numeral 0 stores a spool 12 around which a photo film 11 is wound, in a freely rotatable manner. A film entrance and a light shielding cover (not shown) are provided on the side surface of the film cartridge 10, and a spool 12 and a light shielding cover opening / closing shaft 13 are exposed on the bottom and upper surfaces of the film cartridge 10, respectively. When the spool 12 is rotated in the film feeding direction (winding up), the stored photographic film 11 is sent out of the film cartridge 10 from the film entrance,
When the spool 12 is rotated in the film rewind direction,
The photographic film 11 can be rewound into the film cartridge 10.

A display window 1 is provided on the bottom surface of the film cartridge 10 for displaying the usage state of the film cartridge 10 by performing a VEI process so that the user can confirm the usage state.
4a, 14b, 14c, and 14d are provided. Then, the use state of the film cartridge 10 is displayed on a display plate (not shown) incorporated inside the film cartridge 10 so as to rotate integrally with the spool 12.
The light-shielding cover opening / closing shaft 13 is rotatable, and rotates between the closed position and the open position.

On the rear and side surfaces of the camera 20, an eyepiece side finder window 21 and an operation knob 23 for unlocking the cartridge loading lid 22 are provided. The operation knob 23 is displaced between a locked position and an unlocked position. Although not shown, on the front surface of the camera 20, a photographing lens, an object-side finder window, a strobe light emitting unit, a distance measuring light emitting window, a distance measuring light receiving window, a light measuring light receiving window, and the like are provided.
On the upper surface, a shutter button, a power switch, a liquid crystal display panel, and the like are provided.

On the bottom of the camera 20, there is provided a cartridge loading chamber 24 for loading the film cartridge 10, and a cartridge loading lid which is freely rotated between an open position for opening the cartridge loading chamber 24 and a closed position for closing light-tightly. 2
2 are provided. A safety operation mechanism, which will be described later, is disposed behind the opening 25 formed on the side of the cartridge loading chamber 24, and engages with a hook 26 formed on the cartridge loading lid 22 to lock the cartridge loading lid 22 in the closed position. I do. The spool engaging shaft 27 provided on the cartridge loading lid 22 engages with the spool 12 of the film cartridge 10 when the cartridge loading lid 22 is at the closed position.

The cartridge loading chamber 24 has substantially the same shape as the outline of the film cartridge 10, and holds the loaded film cartridge 10 in a predetermined posture. Although not shown, a film receiving port into which the sent out photographic film 11 is inserted is formed in a side wall of the cartridge loading chamber 24 at a position facing the film port of the film cartridge 10. Also, spool 1
A spool driver, which will be described later, is provided at a position facing the light-shielding cover 2, and an opening / closing drive shaft is provided at a position facing the light-shielding cover opening / closing shaft 13 so as to protrude from the inner wall of the upper surface of the cartridge loading chamber 24. Further, although not shown, a data disk is provided on the upper surface of the film cartridge 10, and a bar code reader is arranged at a position facing the data disk.

On the data disk, data such as the type, sensitivity, and number of shots of the photo film 11 are described by bar codes. When the film cartridge 10 is loaded into the cartridge loading chamber 24 and the cartridge loading lid 22 is turned to the closed position and locked, the spool driver is reversed and data is read and read by the barcode reader disposed inside the camera 20. A use state detection process is performed. When the loaded photo film 11 is not used or is in the middle of shooting, the spool driver rotates forward and sends out the photo film 11 to prepare for shooting. If the image has been photographed or developed, the display of the use state is returned to the original state and the film cartridge 1 is displayed.
0 can be taken out.

FIG. 2 is a perspective view of a safety operation mechanism provided inside the camera 20. The safety operation mechanism 30 locks the cartridge loading lid 22 rotated to the closed position, unlocks the lock by an operation from the outside of the camera 20, and transmits a driving force of the feeding motor 28. A force transmitting unit 40, a driving force responding device 50 connected to the driving force transmitting unit 40 and generating a mechanical displacement by the driving force of the feed motor 28, and a displacement switching device in which the displacement direction is switched according to the rotation direction of the feed motor 28; And a mechanical unit 60. Hereinafter, the configuration of each mechanism will be described.

The lock mechanism 33 comprises an operation knob 23, a lock lever 34, an interlocking ring 36, first and second opening / closing gears 37 and 38, and an opening / closing drive shaft 39. The lock lever 34 is rotatably attached to a rotation shaft 35, and is constantly urged in a clockwise direction in the figure by an unshown urging means. At one end of the lock lever 34, a hook engaging claw 34a for engaging with the hook 26 of the cartridge loading lid 22 to lock the cartridge loading lid 22 at the closed position is formed, and at the other end, an engaging groove 34b is formed. Have been. The operation knob 2 is provided on the contact portion 34c formed in an arc shape.
3, when the operating knob 23 is displaced toward the unlocked position (upward in the figure), the contact portion 34c is pressed to move the lock lever 34 counterclockwise in the figure. To rotate. Thus, the hook locking claw 34a and the hook 26 are separated from each other, and the lock of the cartridge loading lid 22 by the lock lever 34 is released.

The interlocking ring 36 is rotatably arranged coaxially with a spool driver described later. Interlocking ring 3
An engagement pin 36b is provided upright at the tip of the protrusion 36a formed integrally with the projection 6, and is engaged with the engagement groove 34b of the lock lever 34. The interlocking ring 36 rotates in conjunction with the rotation of the lock lever 34. On the circumference of the interlocking ring 36, a locking portion 36c and an engaging portion 36d are formed. The locking portion 36c is locked by the displacement of the driving force response device 50 or the displacement switching mechanism 60 described later, and the rotation of the interlocking ring 36 is prevented. The engagement portion 36d is provided in the first
The interlocking ring 36 engages with the engagement portion 37 b of the opening / closing gear 37.
Is transmitted to the opening / closing drive shaft 39 via the first and second opening / closing gears 37 and 38 to open and close the light shielding cover of the film cartridge 10.

The driving force transmitting section 40 includes a D1 gear 41, D2
It comprises a gear 42, a D3 gear 43, and a spool driver 44. Each gear is a D1 gear 41, a D2 gear 4
2, a D3 gear 43, and a pinion gear 28a provided at the tip of the rotation shaft of the feed motor 28, and a D1 gear 4
1 mesh and sequentially transmit the driving force of the feed motor 28. A spool driver 44 is provided integrally with the D3 gear 43, and rotates the spool 12 of the film cartridge 10 by the transmitted driving force to feed the photographic film 11.

The driving force response device 50 includes a gear 51, a case 52, a rotating body 53, a rotating lever 54, and the like. As shown in FIG. 3, the gear 51 and the case 52 are integrated with each other.
Is stored. The inside of the case 52 and the rotating body 53 are provided with blades 52a and 53a, respectively. Also,
As shown in FIG. 2, one of the rotating shafts 55 of the rotating body 53 is exposed to the outside of the case 52, and a rotating lever 54 is provided at an end thereof.
Are engaged. When the feed motor 28 is driven, D1
The case 52 rotates integrally with the gear 51 via the gear 41. Then, the highly viscous grease 56 flows by the blades 52 a inside the case 52. When the high-viscosity grease 56 flows, the blades 53a are pressed and the rotating body 53 rotates in the same direction as the case 52.
8 rotates clockwise or counterclockwise depending on the rotation direction.

Further, as described above, the rotation torque of the feed motor 28 is transmitted to the rotating lever 54 via the fluid, so that when the feeding motor 28 is stopped, the rotating lever 54 is stopped. Is hardly generated. Therefore, when the feed motor 28 is stopped, the rotating lever 54 is always stopped by the biasing force of the return spring 67 regardless of the motor rotation direction immediately before.
Contact 5 That is, when the feeding motor 28 is rotating forward, the rotating lever 54 is not displaced while being in contact with the stopper 65, and when the feeding motor 28 is rotating backward, the rotating lever 54 is It rotates clockwise against the urging force of the return spring 67 and is displaced to a position where it comes into contact with the stopper 66. Thereafter, when the feed motor 28 stops, the rotating lever 54 returns to the position where it comes into contact with the stopper 65 again by the urging force of the return spring 67.

At the tip of the rotating lever 54, an interlocking ring 3
A contact portion 54a that is in contact with the sixth locking portion 36c is formed. When the feed motor 28 is rotating in the rewinding direction (reverse rotation), the rotating lever 54 is rotated clockwise, and the abutting portion 54a enters the rotation locus of the locking portion 36c. As a result, the rotation of the interlocking ring 36 to the unlocked position is prevented, and the rotation of the lock lever 34 engaged with the interlocking ring 36 is also prevented.
Cannot be unlocked. When the feeding motor 28 is rotating (forward rotation) in the winding direction, the rotating lever 54 rotates counterclockwise, and the contact portion 54a is retracted out of the rotation locus of the locking portion 36c. , Interlocking ring 3
The rotation of the lock lever 6 and the lock lever 34 is allowed. Thereby, the lock of the cartridge loading lid 22 can be released. Thus, in the driving force response device 50, when the feed motor 28 is rotating in the reverse direction, the operation knob 23 cannot be displaced to the unlocked position, and the cartridge loading lid 22 is not opened.

The displacement switching mechanism 60 includes a D2 gear 42 and a rotating ring 61. On the bottom surface of the D2 gear 42, a concave portion 42a (shown by a broken line) in which the rotating ring 61 can be stored is formed. The rotating ring 61 includes a contact portion 61a that contacts the locking portion 36c of the interlocking ring 36;
2 a projection 6 that contacts and presses the peripheral surface of the concave portion 42a of the gear 42
1b. Rotating ring 61 is recessed 42a
And the rotational torque of the feed motor 28 is transmitted by the frictional force that the protrusion 61b receives from the peripheral surface of the concave portion 42a.
The rotation ring 61 rotates within a range regulated by a stopper (not shown) in a direction corresponding to the rotation direction of the D2 gear 42.
When the feed motor 28 is stopped, it is held at a position corresponding to the immediately preceding motor rotation direction.

When the feeding motor 28 is rotating (forward rotation) in the hoisting direction, the rotating ring 61 rotates counterclockwise and the abutting portion 61a enters the rotation locus of the locking portion 36c. . As a result, the rotation of the interlocking ring 36 to the unlocked position is prevented, and the rotation of the lock lever 34 that engages with the interlocking ring 36 is also prevented. Therefore, the lock of the cartridge loading lid 22 cannot be released. . Also,
When the feeding motor 28 is rotating in the rewinding direction (reverse rotation), the rotating ring 61 rotates clockwise to rotate the contact portion 6.
Since 1a is retracted outside the rotation locus of the locking portion 36c, the rotation of the interlocking ring 36 and the lock lever 34 is allowed.
Thereby, the lock of the cartridge loading lid 22 can be released. Thus, in the displacement switching mechanism 60, when the feed motor 28 is rotating forward, the operation knob 23 cannot be displaced to the unlocked position, and the cartridge loading lid 22 is not opened.

Next, the operation of the above configuration will be described.
When the film cartridge 10 is loaded into the cartridge loading chamber 24 and the cartridge loading lid 22 is rotated to the closed position, the cartridge loading lid 22 is locked by the lock mechanism 33, and at the same time, the light shielding lid of the film cartridge 10 is rotated to the open position. You. When the cartridge loading lid 22 is locked, the feed motor 28 is driven, the spool 12 is rotated via the spool driver 44, and the photographic film 11 is fed out of the film cartridge 10. Further, simultaneously with the driving of the feed motor 28, the driving force transmitting unit 40
Is driven by the driving force responding device 50 and the displacement switching mechanism 60 which are connected to the driving force response device 50. When the feed motor 28 is rotating (forward rotation) in the winding direction, the rotating ring 61 of the displacement switching mechanism 60 rotates counterclockwise, and the contact portion 61a moves within the rotation locus of the locking portion 36c. To enter. Then, the rotation of the interlocking ring 36 to the unlocked position is prevented, and the rotation of the lock lever 34 engaged with the interlocking ring 36 is also prevented. As a result, the operation knob 23 cannot be displaced to the unlock position, the cartridge loading lid 22 is not opened, and the light shielding lid does not rotate to the closed position.

When the photographing of all the photographing frames is completed or when the rewinding operation is performed, the feed motor 28 is driven, and the spool driver 44 connected to the feed motor 28 rotates in the reverse direction so that the photographic film 11 is turned into the film cartridge 10. Rewind. At the same time, the driving force response device 50 and the displacement switching mechanism 60 connected to the driving force transmission unit 40 are driven. The feed motor 28 rotates in the rewind direction (reverse rotation)
The turning lever 5 of the driving force response device 50
4 rotates clockwise, and the contact portion 54a enters into the rotation locus of the locking portion 36c. Then, the rotation of the interlocking ring 36 to the unlock position is prevented, and the
The rotation of the lock lever 34 that engages with 6 is also prevented. As a result, the operation knob 23 cannot be displaced to the unlock position, the cartridge loading lid 22 is not opened, and the light shielding lid does not rotate to the closed position.

When the photographic film 11 is completely stored in the film cartridge 10, the VEI process is completed, and the feed motor 28 is stopped, the driving force response device 50 and the displacement switching mechanism 60 are not driven. Then, the contact portions 54a and 6
Since 1a is retracted outside the rotation locus of the locking portion 36c, the lock of the cartridge loading lid 22 by the lock lever 34 can be released. When the operation knob 23 is displaced to the unlock position, the light-shielding lid of the film cartridge 10 is rotated to the closed position by the opening / closing drive shaft 39, and the hook locking claw 34a and the hook 26 are separated from each other to disengage the cartridge loading lid 22. The lock is released. Thus, since the cartridge loading chamber 24 is opened, the film cartridge 10 can be taken out. As described above, regardless of the rotation direction of the feed motor 28, while the feed motor 28 is being driven, the interlocking ring 36 is driven by the displacement of either the driving force response device 50 or the displacement switching mechanism 60.
In addition, the rotation of the lock lever 34 is prevented, the opening of the cartridge loading lid 22 is prohibited, and the rotation of the light shielding lid of the film cartridge 10 to the closed position is also prohibited.

In the above embodiment, the blades 52a and 53a are provided on the case 52 and the rotating body 53. However, as shown in FIG. 4, these blades 52a and 53a may be omitted.
In this case, the transmission efficiency of the rotation from the case 52 to the rotating body 53 is reduced, but the entire driving force response device 50 is made compact.

In the above embodiment, the driving force of the feed motor 28 is transmitted using a fluid, but the driving force may be transmitted using an electromagnetic force. As shown in FIG. 5A, the driving force responding device in this case includes a gear 51, a rotating lever 54, a rotating shaft 55, a permanent magnet 57, a case 58, a magnetic ring 58, and the like. The rotary shaft 51a formed integrally with the gear 51 has a structure shown in FIG.
As shown in (B), ring-shaped permanent magnets 57a and 57b magnetized in the radial direction and having different polarities are provided coaxially. A case 58 formed of a conductor is integrally supported on the shaft coaxially with the rotating shaft 51a, and a magnetic ring 59 is fitted on the outside of the case 58 to form a magnetic circuit. When the feed motor 28 is driven, the rotating shaft 51
As a rotates, the magnetic flux of each part in the case 58 located in the magnetic circuit changes, and an eddy current is generated in the case 58. And
Due to the eddy current and the magnetic fields of the permanent magnets 57a and 57b, torque is generated in the case 58 in the same direction as the rotation direction of the rotating shaft 51a, and the rotating shaft 55 formed integrally with the case 58 is formed.
And the rotation lever 54 is rotated.

The rotation lever 54 rotates clockwise or counterclockwise depending on the rotation direction of the feed motor 28. When the feeding motor 28 is rotating (forward rotation) in the winding direction, the rotating lever 54 rotates counterclockwise to
“a” retreats out of the rotation locus of the locking portion 36 c of the interlocking ring 36. When the feeding motor 28 is rotating in the rewinding direction (reverse rotation), the rotating lever 54 is rotated clockwise so that the abutment portion 54a is within the rotation locus of the locking portion 36c of the interlocking ring 36. enter in. Then, the rotation of the interlocking ring 36 to the unlock position is prevented, and the
The rotation of the lock lever 34 that engages with 6 is also prevented. As a result, the operation knob 23 cannot be displaced to the unlock position, the cartridge loading lid 22 is not opened, and the light shielding lid does not rotate to the closed position.

In the above embodiment, the cartridge loading lid 2
By preventing the displacement of the interlocking ring 36 that turns in conjunction with the lock lever 34 that locks the lock 2 in the closed position,
The opening of the cartridge loading lid 22 is prohibited. However, it is detected whether the photo film 11 has been sent out from the film cartridge 10 based on whether or not the photo film 11 comes into contact with the detection member. When the photo film 11 is detected, the cartridge loading lid 2 is detected.
In the camera provided with the film detecting mechanism for prohibiting the unlocking of 2, the detecting member is in a position where the detecting member is in contact with the photographic film 11 while the feeding motor 28 is driven even after the photographic film 11 is separated from the detecting member. The cartridge may be held to prohibit unlocking of the cartridge loading lid 22.

FIG. 6 is a perspective view showing a safe operation mechanism of a camera having a film detecting mechanism. The film detection mechanism 70 includes a detection pin 71, a detection lever 72, a locking arm 7,
4. A return spring 75 is provided. Photo film 1
When 1 is conveyed from the left side in the figure and comes into contact with the detection pin 71 and is pressed, the detection lever 72 rotates clockwise about the rotation shaft 73. The locking arm 74 engaged with the detection lever 72 by the engaging pin 72c moves leftward in the drawing by this rotation, and the tip end thereof is positioned within the movement path of the operating arm 23b of the operation knob 23. The entered film is detected. In this film detection state, since the operation knob 23 cannot be displaced to the unlocked position, the cartridge loading lid 22 is not opened and the light shielding lid does not rotate to the closed position.

While the photo film 11 and the detection pin 71 are separated from each other, when the feed motor 28 is rotating forward,
The rotating ring 61 of the displacement switching mechanism 60 rotates counterclockwise, and the abutting portion 61c presses the abutting portion 74a of the locking arm 74 to hold the film detecting mechanism 70 in the film detecting state. When the feed motor 28 is rotating in the reverse direction,
The rotation lever 54 of the driving force response device 50 rotates clockwise, and the contact portion 54b presses the contact portion 74a of the locking arm 74 to hold the film detection mechanism 70 in the film detection state. Thus, even when the photo film 11 and the detection pin 71 are separated from each other, when the feed motor 28 is driven, the film detection mechanism 70 is held in the film detection state. And the cartridge loading lid 22 is not opened. Further, the light-shielding lid does not rotate to the closed position.

[0038]

As described above, according to the safety operation mechanism for a camera of the present invention, the safety operation mechanism is provided so as to be connected to the driving force transmitting portion of the feeding motor, and utilizes the mechanical driving force of the feeding motor. It has a driving force responding device and a displacement switching mechanism for detecting the drive of the feed motor and prohibiting the unlocking of the cartridge loading lid in the closed position, so that the feed motor is used to feed the photographic film from the film cartridge. After the is driven, the cartridge loading lid is not opened until all the photographic film is stored in the film cartridge, the VEI processing is completed, and the feeding motor is stopped. Further, the light blocking cover for opening and closing the film entrance and exit is not closed until the photographic film is completely wound into the film cartridge.

[Brief description of the drawings]

FIG. 1 is a perspective view of a camera embodying the present invention.

FIG. 2 is a perspective view showing a safe operation mechanism of the camera embodying the present invention.

FIG. 3 is a sectional view of the driving force response device shown in FIG. 2;

FIG. 4 is a cross-sectional view of a driving force response device according to a second embodiment.

FIG. 5 is a cross-sectional view of a driving force response device according to a third embodiment.

FIG. 6 is a perspective view illustrating a safe operation mechanism of a camera including a film detection mechanism according to a fourth embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 10 Film cartridge 11 Photo film 20 Camera 22 Cartridge loading lid 28 Feeding motor 30 Safety operation mechanism 33 Lock mechanism 34 Lock lever 36 Interlocking ring 40 Driving force transmission part 50 Driving force responding device 53 Rotating body 54 Rotating lever 60 Displacement switching mechanism 64 Rotating lever

Claims (5)

[Claims] 1. A safety operation mechanism of a camera for prohibiting opening of a cartridge loading lid for opening and closing a film cartridge loading chamber while a feeding motor is being driven, provided in connection with a driving force transmitting portion of the feeding motor. A driving force responding device that generates mechanical displacement and a displacement switching mechanism that changes the direction of displacement in accordance with the rotation direction of the feeding motor, and a lock that displaces between a position for locking the cartridge loading lid and a position for unlocking the cartridge loading lid. When the feed motor is rotated in one direction, the displacement switching mechanism is displaced to hold the lock member in a locked position, and when the feed motor is rotated in another direction, the drive is driven. A safety operation mechanism for a camera, wherein a force response device is displaced to hold the lock member at the lock position. 2. A safety operation mechanism of a camera for prohibiting a closing operation of a light-shielding cover for opening and closing a film entrance of a film cartridge while the feeding motor is being driven. A driving force responding device that generates a mechanical displacement and a displacement switching mechanism that changes the direction of displacement in accordance with the rotation direction of the feeding motor, and a light-shielding lid opening and closing member that displaces the light-shielding lid between an open position and a closed position. When the feed motor is rotated in one direction, the displacement switching mechanism is displaced to hold the light blocking cover opening / closing member in an open position, and when the feed motor is rotated in another direction, the drive is performed. A safety operation mechanism for a camera, wherein a force response device is displaced to hold the light blocking cover opening / closing member at the open position. 3. A safety operation mechanism of a camera for prohibiting opening of a cartridge loading lid for opening and closing a film cartridge loading chamber while the feeding motor is being driven, provided in connection with a driving force transmitting portion of the feeding motor. A driving force responding device that generates a mechanical displacement and a displacement switching mechanism that switches a displacement direction in accordance with a rotation direction of a feeding motor; an opening / closing operation member that unlocks the cartridge loading lid from outside the camera; and the film. A film detecting mechanism for detecting a film by abutting and displacing the film, and prohibiting unlocking of the cartridge loading lid in the film detecting state; and when the feed motor rotates in one direction, the displacement switching mechanism. Is displaced to hold the opening / closing operation member or the film detection mechanism in the locked position, and rotate the feed motor in the other direction. A safety operation mechanism for a camera, wherein the driving force responding device is displaced during rotation to hold the opening / closing operation member or the film detection mechanism at the lock position. 4. The driving force response device according to claim 1, wherein the driving force response device is displaced by transmitting a continuous rotation driving force of the feed motor via a fluid. Camera safety operation mechanism. 5. The safe operation of a camera according to claim 1, wherein the driving force responding device is displaced by an electromagnetic force generated with the continuous rotation of the feed motor. mechanism.