JP2846303B2 - Cameras using light tight cartridges - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a light-tight cartridge.

[0002]

2. Description of the Related Art Conventionally available single-lens reflex cameras and compact cameras are 135 films (including patrones) having a shape and a size determined by an easily available and most widely used international standard (ISO 1007-1979). A so-called 35 mm film is generally used. This 35 mm film patrone has a resin spool around which the film is wound, housed in a metal patrone body. A light-blocking member called telem is attached to the film outlet of the patrone body. However, in a patrone having such a structure, when the entire length of the film is wound into the patrone body after exposure, a gap is formed between the telemps, which may result in poor light tightness. However, there is a problem that the film being rewound may be scratched.

[0003] From such a background, the present applicant has proposed a light-tight cartridge having excellent light shielding properties and easy handling in Japanese Patent Application No. 63-57785. As shown in FIG. 4, the cartridge 6 includes a cartridge main body 15 and an opening / closing lid 16, which are integrally formed of elastic light-shielding plastic. A spool 14 around which the photographic film 7 is wound is rotatably mounted inside the cartridge body 15 so that only the shaft end 14a is exposed. Further, the opening / closing lid 16 forms a film entrance 6b between itself and the cartridge main body 15 by being rotated about the hinge 6a.

[0004]

However, when a cartridge provided with the above-described opening / closing lid is used by being mounted on a camera, the opening / closing lid must be reliably opened and closed at an appropriate timing. In addition, the complicated loading and unloading operations of the cartridge due to the opening and closing operation of the opening and closing cover is a great difficulty in terms of camera operability.

SUMMARY OF THE INVENTION It is an object of the present invention to solve the above-mentioned problems and to provide a camera in which a light-tight cartridge having an opening / closing lid can be used safely and simply. .

[0006]

SUMMARY OF THE INVENTION In order to achieve the above object, the present invention comprises: a spool for winding a photographic film in a roll shape; In a camera using a light-tight cartridge having a rotatable opening / closing lid for protecting a film inside from light in a closed position, a cartridge storage chamber for storing a light-tight cartridge inserted from the axial direction of the spool. A loading lid for closing the cartridge storage chamber in a light-tight manner, locking means for locking the loading lid at a closed position, and opening and closing the opening / closing lid from the closed position in conjunction with the locking of the loading lid at the closed position. Opening / closing lid opening means rotating to the position. Further, there is provided an opening / closing lid closing means for rotating the opening / closing lid from the open position to the closed position in conjunction with the unlocking operation of the locking means.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS In FIG. 1 showing a camera 1 according to the present invention, a shutter release button 3 is provided on an upper surface of a camera body 2. An exposure frame 8 for defining an exposure area for one frame is formed in the center of the inside of the camera body 2. Film winding room 10
Are provided. A back cover 4 as a loading cover for closing the cartridge storage chamber 9 in a light-tight manner via the hinge 5 is provided to be openable and closable.

[0008] The cartridge storage chamber 9 is formed in a shape corresponding to the cartridge 6. In the film take-up chamber 10, there is provided a take-up shaft 11 for taking up a 135 film (hereinafter referred to as a film) 7 sent out from the cartridge 6. A sprocket gear 12 is provided on the upper side of the exposure frame 8.

As shown in FIG. 4, the cartridge 6 has a cartridge body 15 having a spool 14 around which the film 7 is wound rotatably provided, and the cartridge body 15 and the cartridge body 15 via a hinge 6a. And a molded opening / closing lid 16. These are produced as an integrally molded product of elastic light-shielding plastic, and the cross section is shown in FIG. The vicinity of the film entrance 6b inside the opening / closing lid 16 is formed in an arc shape as shown in FIG.
The cartridge body 15 is formed into a shape protruding inward, and when the spool 14 is rotated in the direction opposite to the rewinding direction, the leading end of the film 7 is arranged along the arcuate portion 16a inside the opening / closing lid 16. It moves to the film doorway 6b.

The cartridge body 15 and the opening / closing lid 1
As shown in FIG. 1 and FIG.
18 are formed respectively. The recess 17 is provided in the cartridge storage chamber 9, and the cartridge main body 15
Is engaged with the projection 21 for holding the
Is engaged with the projection 23 of the opening / closing operation lever 22 that opens and closes the opening / closing lid 16. The opening / closing operation lever 22 is rotatably mounted around a shaft 24 fixed to the camera body 2, and is urged downward by a spring 26 so as to contact a stopper 25 provided below.

The cartridge storage chamber 9 is provided with a spool drive shaft 27 which engages with the spool 14 and rotates the spool. The side of the cartridge storage chamber 9 that faces the spool drive shaft 27 is cut out, and the cut-out portion 9a is formed.
Are formed, and the cartridge 6 is dropped from the cutout portion 9a, that is, a so-called drop-in type cartridge can be loaded.

A pressure plate 28 for keeping the film on the exposure frame 8 flat is provided in the center of the inside of the back cover 4. The film is pressed against the winding shaft 11 on the hinge 5 side of the pressure plate 28. A film holding roller 29 is provided. On the side opposite to the hinge 5 side, the back cover 4 is attached to the camera body 2.
The back cover lock claw 30 is slidably mounted in the longitudinal direction of the back cover 4 via shafts 31 and 32, and is urged by a spring 33 in a direction away from the pressure plate 28. A back cover lock hole 2 a corresponding to the back cover lock claw 30 is opened in the wall of the cartridge storage chamber 9.

Further, the protrusion 2 of the opening / closing operation lever 22 is provided.
A U-shaped member 37 including a lever pressing pin 34 that engages with 2a and a pair of lid pressing pins 35 that closes the opening and closing lid 16 by pressing the upper part of the opening and closing lid 16 in response to the opening operation of the back lid 4.
Is slidably mounted in the longitudinal direction of the back cover 4 and is urged by a spring 38 in a direction away from the pressure plate 28. At the center of the U-shaped member 37, a back cover opening / closing knob 40 for sliding the U-shaped member 37 is attached via a projection 37a protruding to the front side of the back cover 4. The back cover 4 is formed with a long hole 41 through which the protrusion 37a passes.

The U-shaped member 37 is formed with a claw 37b bent toward the back cover 4 side.
Is slidingly operated to the pressure plate 28 side, thereby engaging with the convex portion 30a of the back cover lock claw 30. Further, if the back cover opening / closing knob 40 is slid in the same direction,
0 is moved to the pressure plate 28 side, the back cover lock claw 30 is released from the back cover lock hole 2a, and the lock of the back cover 4 is released.

A film feed switch 4 for driving a film feed motor to be described later is provided inside the back cover 4.
4 is attached. The width of one edge 4a of the back cover 4 in the longitudinal direction is wide as shown in the figure. When the back cover 4 is closed, the notch 9a of the cartridge storage chamber 9 is formed by the edge 4a. Covered light tightly.

A gear 45 is coaxially fixed to the spool drive shaft 27 as shown in FIG.
5 is a motor 4 via a gear train 46 and a gear 47.
8 is meshed with a pinion gear 49. The pinion gear 49 is meshed with the sprocket gear 12 via a gear 47. A pressing roller 51 is attached to the film winding chamber so that the film 7 can be wound around the winding shaft 11 without loosening.

The opening / closing operation lever 22 and the lever pressing pin 34 constitute opening / closing lid opening means. The back cover opening / closing knob 40, the U-shaped member 37, and the cover pressing pin 35 constitute opening / closing cover closing means.

In order to use the camera 1 constructed as described above, the back cover opening / closing knob 40 is slid to rotate the back cover 4 about the hinge 5, and as shown in FIG. Is dropped from the notch 9a in a drop-in manner. When the cartridge 6 is pushed in until it abuts, the spool 14 engages with the spool drive shaft 27 and the projections 21 and 2
3 enters each.

Next, in FIG. 2A showing a state where the back cover 4 is closed but before the back cover 4 is completely closed, the opening / closing operation lever 22 is brought into contact with the stopper 25 by the bias of the spring 26. The opening / closing lid 16 is closed light-tight. As shown in FIG. 2B, when the back cover 4 is pressed until it comes into contact with the camera body 2, the back cover lock claw 3 is inserted into the back cover lock hole 2a.
0 engages, the back cover 4 is locked to the camera body 2, and the lever pressing pin 34 presses the projection 22 a of the opening / closing operation lever 22. Thereby, the opening / closing operation lever 2
2 is rotated against the bias of the spring 26, and the opening / closing lid 16 is rotated in a direction away from the cartridge body 15, so that the film entrance 6 b is formed in the cartridge 6.

The lever pressing pin 34 is connected to the projection 22a.
Is started immediately before the back cover 4 is locked to the camera body 2 and when the cartridge storage chamber 9 is closed light-tight by the peripheral edge of the back cover 4. Further, at the final stage in which the lever pressing pin 34 presses the protruding portion 22a, the lid pressing pin 35 presses the opening / closing lid 16, but since the position is biased near the hinge 6a of the opening / closing lid 16, the film entrance 6b Does not interfere with the formation of

When the film entrance 6b is formed in this way, as shown in FIG. 3B, the opened / closed lid 16 is rotated.
Accordingly, the movable portion of the film feed switch 44 is pressed, and the motor 48 is driven. The driving force of the motor 48 is
The power is transmitted to the spool drive shaft 27 via the pinion gear 49, the gear 47, the gear train 46, and the gear 45 to rotate the spool 14 clockwise and also rotate the sprocket gear 12 clockwise via the gear 47. Although not shown, the winding shaft 11 is also driven to rotate clockwise at the same time.

The leading end of the film 7 is moved along the arcuate portion 16a of the opening / closing lid 16, and the film entrance 6b
Is sent out to the outside. After the perforation of the film 7 is engaged with the sprocket gear 12, the rotation speed of the sprocket gear 12 is set higher than that of the spool 14, and the friction mechanism (not shown) is connected to the spool drive shaft 27. The sprocket gear 12 is driven and the film 7
Will be delivered.

When the film 7 passes through the film gate formed by the exposure frame 8 and the pressure plate 28 and enters the film take-up chamber 10 as shown in FIG. It is pressed against the take-up shaft 11 and wound up on the take-up shaft 11. Since the rotation speed of the take-up shaft 11 is faster than that of the sprocket gear 12, the take-up shaft 11 becomes the main driving of feeding, and winds up the film 7. The film 7 is wound around the winding shaft 11 without loosening by the action of the film pressing roller 29 and the pressing roller 51.

When the first sheet of the film 7 is set in the exposure frame 8, the feeding of the film 7 is stopped, the shutter is charged, and the preparation for photographing is completed. The photographer shoots by pressing the shutter release button 3 with the lens facing the subject.
When all frames of the film 7 have been shot, a film tension detecting means (not shown) detects the tension of the film 7 and starts automatic rewinding. The motor 48 is rotated in a direction opposite to the direction in which the film is fed, and the photographed film 7 is rewound on the spool 14. At the time of rewinding, the sprocket gear 12 is free to rotate, and rotates following the rewinding of the film 7. When the film 7 is completely wound around the cartridge 6, the rotation of the sprocket gear 12 stops. Sprocket gear 12
The stop of the rotation is electrically detected, and the drive of the motor 48 is stopped by this signal to complete the film rewinding.

Next, as shown in FIG. 2C, the back cover opening / closing knob 40 is slid in the direction of the arrow. The U-shaped member 37 is moved in the same direction, the lever pressing pin 34 is retracted from above the projection 22 a of the opening / closing operation lever 22, and the lid pressing pin 35 presses the upper part of the opening / closing lid 16. After the film entrance / exit 6b is closed light-tight by the opening / closing cover 16 in this way, when the back cover opening / closing knob 40 is further slid in the direction of the arrow, the claw portion 37b engages with the convex portion 30a and the back cover lock claw 30 is engaged. Move in the direction. As a result, the back cover lock claw 30 is disengaged from the back cover lock hole 2a, and the back cover 4 is unlocked. Therefore, if the back cover 4 is rotated about the hinge 5, the cartridge 6 can be collected. it can. If you release your hand from the back cover opening / closing knob 40, the spring 3
The back cover locking claw 30 and the back cover opening / closing knob 40 are returned to their original positions by the action of the back cover 3 and the back cover 38.

FIG. 5 shows a cartridge 55 which is another embodiment of the cartridge 6.
Is provided with convex portions 56 and 57 instead of concave portions 17 and 18. A concave portion that engages with the convex portion 56 is formed in a cartridge storage chamber of a camera that uses the cartridge 55, and an open / close operating lever that opens and closes the open / close lid 58 has a convex corresponding to the protrusion 23. A member that engages with the portion 57 is provided.

FIG. 6 shows a light-tight double cartridge 60. The double cartridge 60 includes a film roll chamber 62 in which an unexposed film 7 is wound and stored, and a winding spool 6 for winding the exposed film 7.
3, a film chamber 64 to be wound around, a bridge portion 66 connecting the film roll chamber 62 and the film chamber 64,
An opening / closing lid 68 for simultaneously closing the film roll chamber 62 and the film chamber 64 in a light-tight manner is provided. In the center of the opening / closing lid 68, an opening 68a for opening a film pressure plate provided on the back lid of a camera using the double cartridge 60 is opened.

The double cartridge 60 is manufactured as a one-piece molded product of light-shielding plastic, and includes a hinge 6 provided between the opening / closing lid 68 and the bridge 66.
The opening / closing lid 68 is rotated about 0a. The film roll chamber 62 and the film chamber 64 are provided with projections 71 and 72 for holding them on the camera side, and the opening / closing lid 68 has a projection 73 with which an opening / closing operation lever on the camera is engaged. , 74 are provided.

When the double cartridge 60 is loaded into the camera, the opening / closing operation lever engaged with the projections 73 and 74 is rotated, and the opening / closing lid 68 is opened to make the film 7 easy to move. As the photographing progresses, the film 7 is wound around a take-up spool 63, and when the photographing is completed, the entire film 7 is stored in the film chamber 64. By operating the back cover opening / closing knob as in the previous embodiment,
The opening / closing lid 68 is closed light-tightly, and the double cartridge 60 can be collected safely.

[0030]

As described above, according to the camera using the light-tight cartridge of the present invention, the opening / closing lid of the cartridge is moved from the closed position to the open position in conjunction with the locking of the loading lid at the closed position. Since the cartridge is rotated, the light-tight cartridge can be used safely and easily. Also,
Since the open / close lid is rotated from the open position to the closed position in conjunction with the unlocking operation of the lock means, the light-tight cartridge provided with the open / close lid can be used safely and easily.

[Brief description of the drawings]

FIG. 1 is a perspective view of an embodiment of the present invention as viewed from behind.

FIG. 2 is an end view for explaining the operation of the main part of the present invention.

FIG. 3 is an end view for explaining the operation of the main part of the present invention.

FIG. 4 is a perspective view showing a light-tight cartridge used in the embodiment of the present invention.

FIG. 5 is a perspective view showing an example of another cartridge.

FIG. 6 is a perspective view showing a double cartridge used in another embodiment of the present invention.

[Explanation of symbols]

 REFERENCE SIGNS LIST 1 camera 2 camera body 4 back cover 6, 55 cartridge 9 cartridge storage chamber 10 film take-up chamber 11 take-up shaft 12 sprocket gear 14 spool 15 film roll chamber 16, 58 opening / closing cover 22 opening / closing operation lever 27 spool drive shaft 30 back cover Lock claw 34 Lever pressing pin 35 Lid pressing pin 40 Back lid opening / closing knob 44 Film feed switch

Claims (2)

(57) [Claims] 1. A rotatable spool for rotatably storing a spool in which a photographic film is wound, forming a film entrance / exit at an open position, and light-tightly protecting the internal film at a closed position. In a camera using a light-tight cartridge having an open / close lid, a cartridge storage chamber for storing the light-tight cartridge inserted from the axial direction of the spool, a loading lid for closing the cartridge storage chamber in a light-tight manner, Locking means for locking the loading lid in the closed position; and opening and closing lid opening means for rotating the opening and closing lid from the closed position to the open position in conjunction with the locking of the loading lid to the closed position. A camera that uses a light-tight cartridge as a feature. 2. The light-tight cartridge according to claim 1, further comprising an opening / closing lid closing means for rotating the opening / closing lid from an open position to a closed position in conjunction with the unlocking operation of the locking means. Camera to use.