JPS6214135A - Unlocking mechanism for back cover of camera - Google Patents

Abstract

PURPOSE:To reduce the number of parts and to reduce the cost of a camera without using an operating member to be exclusively used for unlocking in addition a winding operation member by forming a back cover locking mechanism to be driven between a back cover locking state and an unlocking state and to be turned to the unlocking state interlocking with the movement of a rewinding shaft to the 2nd position. CONSTITUTION:An unlocking lever 20 is moved in an unlocking direction, a projected part 20d of the lever 20 is abutted upon the other end 24b of a locking member 24 and the locking member 24 is rotated around a fixing shaft 32. A locking plate 24a of the locking member 24 is drawn out from a notched groove 4f of the rewinding shaft 4 to move the rewinding shaft 4 optionally in the axial direction, the rewinding shaft 4 is drawn out from a camera body 3 to move the rewinding shaft 4 in the axial direction, a fork 18 of the rewinding shaft 4 is drawn out from a cassette, a locking member 26 is moved in the axial direction of the rewinding shaft 4 unitedly with the rewinding shaft 4 by a flange part 18a of the fork 18, and a projection 26e of the locking member 26 is unlocked from a locking projection 25a on the back cover 25. Consequently, the back cover 25 can be opened/closed from the camera body 3.

Description

[Detailed description of the invention] Industrial applications The present invention relates to a mechanism for unlocking the back cover of a camera.

2. Description of the Related Art Conventionally, in a camera, a cylindrical rewinding shaft is rotatably provided with respect to the camera body and connected to a rotating shaft of a cartridge, and a cylindrical rewinding shaft is housed within the rewinding shaft so as to be movable in the axial direction. a piston that rotates around the axis of the rewinding shaft integrally with the shaft;
The base end is pivotally attached to the piston, rotates integrally with the piston around the axis of the unwinding shaft, is pulled out from the unwinding shaft, and is unwound via the piston at a pulled-out position inclined with respect to the unwinding shaft. While the shaft is being rotated, the rewinding lever is housed within the shaft of the rewinding shaft in the storage position, and the rewinding knob is rotatably provided at the tip of the rewinding lever, and the rewinding knob is pulled. It is known that the rewind lever is pulled out from the rewind shaft, rotated at an angle with respect to the rewind shaft, and the rewind shaft is rotated to rewind the film 5.

In such a camera, a back cover unlocking mechanism is separately provided and is operated by, for example, an operating member provided on the bottom wall of the camera. That is, a foldable handle is provided on the bottom wall, and when the handle is rotated about half a turn, it is locked or released.

Problems to be Solved by the Invention However, the above configuration requires dedicated operating members for rewinding and unlocking the back cover, which increases the number of operating members and increases costs. become. In addition, these operating members occupy space on the outer wall of the camera, which obstructs the arrangement of various other members.

Furthermore, in the case of the above configuration, the back cover cannot be opened unless the camera is changed after rewinding the film, making it impossible to quickly change the film. Furthermore, since the bottom wall of the camera is often provided with a screw hole for attaching a tripod, there is a problem in that it is very difficult to unlock the back cover when the camera is attached to a tripod.

In view of the above-mentioned problems, the present invention provides a rotating cartridge 1b i, which is rotatably provided with respect to the camera body.

a cylindrical unwinding shaft to be connected; a piston that is housed in the unwinding shaft so as to be movable in the axial direction and rotates integrally with the unwinding shaft around the unwinding shaft axis; The rewinding shaft is rotated together with the piston around the axis of the rewinding shaft, and is pulled out from the rewinding shaft and rotates the rewinding shaft via the piston at a pulled out position inclined to the rewinding shaft. In a camera equipped with a rewind mechanism consisting of a rewind lever housed within the shaft of a rewind shaft at a certain position, and a rewind knob rotatably provided at the tip of the rewind lever, the number of operating members is The purpose of the present invention is to provide a camera back lock release mechanism that reduces costs by reducing costs, does not interfere with the installation of pond components, and has good operability.

Means for Solving the Problems In order to achieve the above object, in the present invention, the rewinding shaft is supported to move in the axial direction between the first and second positions with respect to the camera body, and the rewinding shaft is By pulling the return knob in the axial direction, the return knob is moved from the first position to the second position, and is operable between a locked state in which the camera back is locked and an unlocked state in which the camera back is not locked. A camera back cover lock release mechanism is constructed by providing a back cover lock mechanism that becomes unlocked in conjunction with movement to the second position.

Effect of the Invention In the above configuration, the rewind lever is pulled out by pulling the rewind knob, the rewind lever is rotated to rewind the film, and then the rewind shaft is moved to the second position by further pulling the rewind knob. , the back cover will be unlocked.

Embodiments of the present invention will be described in detail below with reference to the drawings.

After explaining the back cover locking mechanism according to this embodiment, a film rewinding mechanism of a camera equipped with the back cover locking mechanism will be explained.

As shown in Fig. 1.2.3, this rewinding mechanism includes a cylindrical rewinding shaft 4 connected to a rotating shaft (not shown) of the cartridge at one end of the camera body 3. The upper end of the shaft 4 protrudes from the upper cover 3a of the camera body 3 to rotatably provide a rewinding knob l, and the index ring 22 is rotatably supported on the upper cover 3a below the rewinding knob 1. A pair of rewind levers 12 that move parallel to each other within the rewind shaft 4
．． 13 - is configured so that it can be pulled out and housed, and the pair of rewind levers 12.13 are pulled out from the rewind shaft 4, and the pair of rewind levers 12.13 are moved in a predetermined direction with respect to the rewind shaft 4. At the tilted pull-out position A, the rewind knob l is rotated around the axis of the rewind shaft 4, and the pair of rewind levers 12.
13 and the rewind shaft 4 to rewind the film into the cartridge, while moving the rewind knob l in the opposite direction to the above-mentioned predetermined direction, to the storage position B.
The rewind levers 12 and 13 are housed within the rewind shaft 4.

The rewinding shaft 4 is made of a cylindrical body having a square hole 4d passing through the shaft center, and is placed above the cartridge stored in the cartridge housing 27 at one end of the camera body 3.
It is rotatably arranged with respect to the upper cover 3a via a rewinding shaft bearing 5. A flange 4a is formed at the upper end of the rewinding shaft 4 protruding outward from the upper cover 33, and the flange 4a allows the rewinding shaft 4 to rest against the rewinding shaft bearing 5, thereby restricting downward movement. be done. One side of the flange 4a is provided with an inclined surface 4e that is inclined outward from the square hole 4d of the rewinding shaft 4. The rewind levers 12 and 13 are prevented from coming into contact with each other so as not to impede the tilting of the rewind levers 12 and 13 with respect to the rewind shaft 4. A bifurcated rewinding fork 18 is fixed to the lower end of the rewinding shaft 4 with a pin 19, and the fork 18 is connected to the rotating shaft of the cartridge. Rotate as one unit. Further, the outer surface of the axially central portion of the rewinding shaft 4 is provided with a notched groove 4f that locks into a locking member 24 of the back cover rotter mechanism 2, which will be described later, and the rewinding lever 12.13 is located at the storage position B. The rewind shaft bearing 5 corresponding to the notch groove 4f is also provided with a notch groove 5a.

A rectangular parallelepiped piston member 11 is housed in the rectangular hole 4d of the rewinding shaft 4 so as to be slidable in the vertical direction, and a rectangular parallelepiped crank holder 10 is housed above the piston member 11 so that it can be pulled out.

This crank holder 10 has a flange IOa for receiving the rewinding knob 1 on its upper outer surface.

The pair of rewind levers 12 and 13 are provided between the piston member 11 and the crank holder 10. The pair of rewinding levers 12 and 13 are parallel prismatic levers having approximately the same length, and one of the rewinding levers 12 and 13 is parallel to the other.
2 is located below the other rewind lever 13,
Place the upper end of each rewind lever 12.13 on the crank holder l.
The lower end is pivotally connected to the lower two forks of the piston member 11 with crank pins 15, 15, while the lower end is connected to the upper fork of the piston member 11 by a pin +4.
, 14. The gap 6 between the pair of rewind levers 12 and 13 is such that the rewind levers 12 and 13 are in the pulled out position A.
When the rewind lever 1 is tilted toward the right in FIG. 1 with respect to the axial direction of the rewind shaft 1 as shown in FIG.
The dimensions are such that the opposing surfaces of the pair of rewind levers 12, 13 come into contact with each other before the lower part of the rewind lever 2 contacts the inclined surface 4e of the rewind shaft 4.

Further, at the lower part of the piston member 11 and the rewinding shaft 4,
It has cutout grooves 11a and 4b that communicate with each other, and
A substantially Ω-shaped spring 23 is engaged with the notch grooves 11a and 4b,
At the storage position B of the rewind knob 1, the piston member 11 is attached to the rewind shaft 4.
, the spring 23 engages with the notch groove 11a of the piston member 11 that communicates with the notch groove 4b of the rewinding shaft 4, thereby positioning the piston member 11. Moreover, this engagement provides a sense of moderation when the rewinding knob l is moved to the storage position, and when the rewinding knob l is pulled out from the rewinding shaft 4, the spring 23 acts against the force of the piston. A sense of moderation is provided by pulling out the material from the notched groove 11b of the member 11.

Further, as shown in FIGS. 4 and 5, the piston member 1
1 is equipped with a guide pin 17, and the guide pin 17 moves within the guide groove 4C of the square hole 4d of the rewinding shaft 4 to guide the piston member 11 in the vertical direction within the rewinding shaft 4. ,
When the rewinding knob l is pulled out from the rewinding shaft 4, the guide pin 17 is stopped against the U-shaped stopper 21 at the upper end of the rewinding shaft 4, so that the piston member 2 is not pulled out from the rewinding shaft 4. do.

The rewinding knob l is rotatably attached to the upper surface of the crank holder 10 via a set screw 16. This rewinding knob l has a protrusion 22 of the index ring 22 on its back surface.
Protrusions 1d that can be engaged with the index ring 22 are protruded at predetermined intervals, and when the rewind lever 12.13 is in the retracted position iB, the protrusions +d engage with the engagement protrusions 22a of the indicator ring 22, thereby closing the rewind knob. 1 and the index ring 22 rotate together, while the rewind lever 12.13
At the pull-out position A, the projection 1d of the rewind knob I is disengaged from the engagement projection 22a of the indicator ring 22.

The index ring 22 is a ring provided in the recess 3c of the camera body 3 so as to be rotatable around the bearing 5 by means of a presser 9. On the upper surface of this index ring 22, the rewinding knob I is rotatably placed, and engagement protrusions 22a are provided at intervals of 120 degrees. The indicator ring 22 has an indicator part 22b on its outer circumferential surface, and the AV displayed around the indicator ring 22 of the upper cover 3a corresponds to the indicator part 22b.
ERAGE.

The indicator section 22b instructs one of the modes, such as 5POT and H/S, to enable mode selection.

In addition to the rewinding mechanism having the above configuration, a back cover lock release mechanism 2 having the following configuration is provided. In other words, the rear lock release mechanism 2 is locked by operating the lock release lever 20)
■ After releasing the locking of the rewind shaft 4 to the camera body 3 by the material 24, pull out the rewind shaft 4 from the camera body 3,
It is generally configured such that the locking member 26 connected to the rewinding shaft 4 and the back cover 25 are unlocked and the back cover 25 is opened.

The lower part of the rewinding shaft 4 is rotatably supported by a rewinding collar 28 that is movably provided in the axial direction in the upper cylindrical portion 27a of the cartridge storage section 27 that stores the cartridge. The outer peripheral surface of the rewinding collar 28 is provided with a groove 28a, and the flange portion 18a of the fork 18 of the rewinding shaft 4 comes into contact with the lower surface of the rewinding collar 28. Ri1
8, the rewind collar 28 is axially moved.

The locking member 26 is provided in the camera body 3 so as to be movable in the vertical direction in FIG.
a is guided so as to be movable in the vertical direction by the side surface of the cartridge storage section 27 and the inner surface of the camera body 3. This main body part 26
The upper end portion of a has a rewinding shaft engaging portion 26b bent in the horizontal direction. The engaging portion 26b is formed of a 0-shaped plate having a groove 26c into which the upper cylinder portion 27ah of the cartridge storage portion 27 is loosely fitted, and the engaging portion 26b is fitted into the groove 28a of the unwinding collar 28. , the locking member 26 is connected to the rewinding shaft 4
The rewind shaft moves integrally with the rewind shaft in the axial direction (vertical direction). The main body part 26a has long grooves 26d, 26d, and a threaded part 27b for fixing the cartridge storage part 27 to the camera main body 3 with a screw 29 is fitted into the long groove 26d for vertical movement. to guide you.

The main body portion 26a further includes a protrusion 26e,
The projection 26e locks into a locking projection 25a protruding from one end edge of the back M25, locking the back cover 25 to the camera body 3 and making it impossible to open or close. By being released from the locking protrusion 25a, the back cover 2
5 can be opened and closed with respect to the camera body 3. A spring 30 is installed in tension between the main body part 26a and the camera main body 3, and the biasing force of the spring 30 causes the lock member 2 to
6 is urged downward in the axial direction so that the projection 26e is always locked with the locking projection 25a of the back cover 25.

Further, a locking member 24 locks in the notch groove 4f of the rewinding shaft 4. The locking member 24 is made of a plate whose central portion is pivoted to a fixed shaft 32 on a base plate 31 fixed to the camera body 3. One end of the locking plate 24a of the locking member 24 is connected to the notch 'tR4f of the rewinding shaft 4 and the notch groove 5a of the rewinding shaft bearing 5.
The locking plate 24 a is fitted into the notch groove 5 a to restrict movement of the rewinding shaft 4 in the axial direction.
h<The ejector comes out from the notch 14f of the rewinding shaft 1, allowing the rewinding shaft 4 to move freely in the axial direction. The other end 24b of the locking member 24
is bent at one end with respect to the locking plate 24a so that it can come into contact with the locking release lever 20. The fixed shaft 32 has
A torsion spring 33 is provided, one end of the torsion spring 33 is locked to the protrusion 24c of the locking plate 24a of the locking member 24, and the other end is locked to the pin J31a fixed to the base plate 31. As a result, the locking portion I/i 24 is urged to rotate along the base plate 31 in a direction in which the locking plate 24a is fitted into the notch groove 4f of the rewinding shaft 4.

The unlocking lever 20 has a rectangular parallelepiped operating portion 20a that protrudes outward from the upper cover 33, and the operating portion 20a
A has a rectangular parallelepiped operating section guide section 20b that is fitted into the guide i3d of the upper cover 3a and is smaller than the operating section 20a at the lower part of the guide section a, and a sliding section 20 is provided on the lower surface of this guide section 20b.
It has c. Further, the sliding contact plate 20c has a protrusion 20d at the lower part thereof that comes into contact with the other end 24b of the locking member 24,
The upper cover 3a is sandwiched between the lower surface of the operating part 20a and the sliding contact plate 20c, the guide part 20b moves in the guide 13d of the upper cover 38 in the unlocking direction, and the protruding part 20d locks into the locking member 20. The locking member 24 is rotated around the fixed shaft 32 by contacting the other end 24b, so that the one end stop plate 24a is removed from the notched groove 4f of the rewinding shaft 4.

A spring 35 is stretched between one end of the sliding contact plate 20c and a protruding pin 34 fixed to the camera body 3, so that the lock release lever 20 can be moved so that its protruding portion 20d is at the other end of the locking member 24. It is always biased in a direction in which it does not come into contact with 24b, that is, in a locking direction.

1 and 10, 36 is an automatic rewinding gear fixed to the outer periphery of the rewinding shaft 4 with a key 37, 38 is a binion that meshes with the automatic rewinding gear 36, and 39 is the pinion 3.
8 is supported at the upper end by a pinion knob pin 40 so as not to be relatively rotatable, while the lower end is supported by the lower cover 3e of the camera body 3.
The automatic rewind shaft 41 is installed so that it does not protrude from the camera body 3 and is exposed to the outside, and is supported at the upper end of the automatic rewind shaft 39 so as not to be relatively rotatable, while the lower end is supported under the camera body 3. an automatic rewinding shaft protruding outward from the cover 30;
4] is an automatic rewinding coupler fixed to the lower end of the automatic rewinding shaft 39; 42 is an automatic rewinding coupler fixed to the lower end of the automatic rewinding shaft 39;
The automatic rewind bearing 43 supports the lower end of the automatic rewind shaft 39, and is an E-ring that is fitted into the upper end of the automatic rewind shaft 39 and holds the automatic rewind shaft 39 against the rewind shaft bearing 5 to prevent it from being pulled out.

Further, 44 indicates a connecting portion of the motor drive, 45 is a coupler that can be connected to or disconnected from the automatic rewind coupler 41 in a relatively non-rotatable manner, and 46 is a motor drive rewind shaft with the coupler 45 fixed to the end thereof. , 47 is a spring receiver, 48 is a spring mounted between the coupler 45 and the spring receiver 47, 49 is a bearing for the motor drive rewinding shaft 46, 5
0 is a motor drive cover, and when the coupler 45 is connected to the automatic rewind coupler 41, the coupler 45 is integrated with the motor drive rewind shaft 46 via the gear train and clutch mechanism by the rotational drive of the motor drive motor. The automatic rewinding shaft 39 is rotated while the rewinding shaft 4 is rotated.

According to the above configuration, as shown in FIG. 1, when rewinding the film after photographing in storage position B, the rewind knob l is pinched with fingers and pulled upward from the upper cover 3a, and the rewind knob l is From inside the square hole 4d of the unwinding shaft 4 through the crank boulder
1O, pull out the rewinding lever 12.13 from the rectangular hole 4d of the rewinding shaft 4, and raise the piston member 11 within the rectangular hole 4d of the rewinding shaft. And the piston member 11
When the guide pin 17 is brought into contact with the stopper 21, the rewind lever 12.1.3 is moved together with the rewind knob l to the pin 1.
The rewinding levers 12 and 13 are moved in parallel by tilting around 4.14 with respect to the axial direction of the rewinding shaft to a pull-out position A where the opposing surfaces of the pair of rewinding levers 12 and 13 are in contact with each other. At this pull-out position A, the user pinches the rewind knob 1 with his or her fingers and rotates the rewind knob 1 around the rewind axis. When pulling out the rewind lever 1 from the rewind shaft 4, the rewind shaft 4
Since the locking plate 24a of the locking member 24 is fitted into the notched groove 4f, the rewinding shaft 4 will not be pulled out from the camera body 3.

Next, when rewinding the film into the cartridge and removing the cartridge from the camera body 3, the lock release lever 2
0 in the unlocking direction against the biasing force of the spring 35, the protruding portion 20d of the locking release lever 20 disengages from the locking member 24.
The locking member 24 is brought into contact with the other end 246 and rotated around the fixed shaft 32 against the biasing force of the torsion spring 33 .
Then, the locking plate 24a of the locking member 24 is pulled out from the notched groove 4 of the rewinding shaft 4, and the rewinding shaft 4 is made movable in the axial direction, and the rewinding shaft 4 is moved relative to the camera body 3. When the fork 18 of the rewind shaft 4 is pulled out from the cartridge, the rewind shaft 4 moves in the axial direction.
The lock member 26 is moved integrally with the rewind shaft 4 in the axial direction of the rewind shaft 4 via the rewind collar 28 by the flange portion 18a of the rewind 18, and the protrusion 26e of the lock member 26 locks the back cover 25. It comes off the protrusion 25a and the back! 25 can be opened and closed with respect to the camera body 3. Conversely, when locking the back cover 25 to the camera body 3, when the back M25 is pressed against the camera body 3, the protrusion 26e of the locking member 26 always holds the spring 3.
Since the protrusion 2 (ie) of the locking member 26 is urged in the direction of locking with the locking protrusion 25a of the back cover 25 by It is held in the main body 3 so that it cannot be opened or closed.

According to the above embodiment, since the locking plate 24a of the locking member 24 is locked in the notch groove 4r of the rewinding shaft 4, the rewinding lever 12°I3 is moved from the rewinding shaft 4 to the rewinding knob 1. When pulling out the rewind shaft 4, unless the lock release lever 20 releases the locking member 24 from the rewind shaft 4, the rewind shaft 4 cannot be pulled out from the camera body 3, and the rewind shaft 4 cannot be pulled out from the camera body 3. It is also possible to prevent a situation where the camera back 25 opens to an unnecessary color due to the camera back 25 being pulled out by mistake. In addition, by pulling the rewind knob 1, the rewind shaft 4 is pulled out relative to the camera body 3 and the back cover 25 is unlocked, making it easy to perform the lock release operation. In addition, the locking member 2 is
6 to unlock the back cover 25,
The locking member 26 can be unlocked simultaneously with the operation of pulling out the fork 18 from the cartridge, and the operating mechanism of the locking member 26 can be simplified.

Further, since the lock release lever 20 is arranged near the rewind knob l, the lock release operation can be performed with one hand, and the back cover 25 can be locked by moving the lock release lever 20 along the upper surface of the upper cover 3a. Since the lever is released, it is less likely to be operated erroneously than when the lever is a push-in type. In addition, an automatic rewinding gear 36, a pinion 38,
Since the motor drive coupler 45 can be connected via the automatic rewinding shaft 39 and the automatic rewinding coupler 41, and the automatic rewinding coupler 41 is surrounded by the automatic rewinding shaft bearing 42 of the lower cover 3e, The rewinding shaft 46 of the motor drive can be connected to the rewinding shaft 4 without providing any opening in the lower cover 3e, and when the motor drive is connected to or uncoupled from the camera body 3, light beams are not transmitted into the camera body. No mechanism is required to prevent leakage. In addition, since the coupler 41 is stored in the automatic rewind shaft bearing 42 and does not protrude from the lower cover 3e,
When handling the camera body 3 with your hands, you will not feel any discomfort in your hands.
Moreover, the degree of freedom in the position of the coupler 41 is also increased.

Note that the present invention is not limited to the above embodiments,
It can be implemented in various other ways. For example, No. 11-14
As shown in the figure, a lock release lever 51 is provided in the rewind knob l, and the lock release lever 51 is operated only after the rewind lever 12.13 is pulled out through the rewind knob l. When operating the rewind knob l,
It is better to prevent the lock release lever 51 from being operated by mistake. That is, the lock release lever 51 is made of a prismatic rod and is attached to the index ring 22 and the upper cover 38 so as to be movable in the axial direction.
1 is provided with a small stepped portion 51a, and a temporary spring 52 is fitted into this small stepped portion 51a to bias it upward in the axial direction, while a protruding plate 24d of the other end 2Jb of the locking member 24 is attached to the lower part of the lock release lever 51. Push the lock release lever 51 into the camera body with your finger against the biasing force of the temporary spring 52, move the lever 51 downward in the axial direction, and lock it with the cam surface 51b. The locking member 24 may be rotated around the fixed tIIE 132 by pressing the protruding plate 24c of the member 24 against the biasing force of the torsion spring 33.

Effects of the Invention According to the above configuration, the back cover is unlocked by pulling the rewind knob, so there is no need for an operation member dedicated to unlocking in addition to the rewind operation member, and the number of parts is reduced. In addition to reducing costs, it does not take up much space on the exterior wall of the camera, so it does not interfere with the installation of other components.

Furthermore, since the lock can be released with the same member after the film has been rewound, operability is also extremely good.

[Brief explanation of drawings]

FIG. 1 is a longitudinal cross-sectional view showing the rewind mechanism and the back cover locking mechanism in a retracted state of the rewind lever of a camera equipped with a camera back cover lock release mechanism according to an embodiment of the present invention, and FIG. 3 is a perspective view of the rewinding mechanism and the back cover locking mechanism, FIG. 3 is a longitudinal sectional view of the rewinding mechanism with the rewinding lever in the pulled out state and the rewinding shaft in the locked state, and FIGS. A vertical cross-sectional view of a portion of the upper part of the shaft, a cross-sectional view taken along the line ■-V in Figure 4, Figure 6 is a perspective view of the back cover lock release mechanism, and Figure 7 shows the rewinding shaft being pulled out via the rewinding knob. A vertical cross-sectional view of the back cover lock release mechanism in a state where the lock is released from the returned state, FIG. 8 is a cross-sectional view showing the relationship between the locking member and the rewinding shaft, and FIG. 9 is a cross-sectional view showing the relationship between the locking member and the rewinding shaft. FIG. 1θ is a perspective view showing the automatic rewinding shaft, FIGS. 11 and 12 are longitudinal sectional views and main part perspective views of the back cover lock release mechanism according to other embodiments, respectively. 13th,
FIG. 14 is a longitudinal sectional view showing the locking state and the unlocking state of the slotted shaft in the other embodiments described above, respectively. 1 Rewind knob, 2 ・Back cover lock release mechanism, 3 ・Camera body, 3a Upper J bar, 3e Lower cover, 4 Rewind shaft, 4r Notch groove, 5 Rewind shaft bearing, 5a Notch iM
, 9... Bearing is held down, io crank holder, 11
...Piston, 12.13...Rewind lever, l=1.
15.19 Pin, 16 ・Set hiss, 17...
Guide pin, 18... Fork, 2o - Lock release lever, 21... Stopper, 22... Index ring, 23
．． 30.35... Spring, 24.51... Locking member,
24a...Locking portion, 24b...Other end, 24d...Protrusion plate, 25...Back cover, 25a...Latching protrusion, 26-Lock member, 26e...Protrusion, 27 Patrone storage section,
2. Rewind collar, 29..screw, 3I. base plate, 32
・Fixed shaft, 33 Torsion spring, 34 ・Protruding pin. Patent Applicant Minolta Camera Co., Ltd. Representative Patent Attorney 2 persons mentioned above 1. 6.

Claims (2)

[Claims] (1) A cylindrical rewinding shaft (4) rotatably provided with respect to the camera body (3) and connected to the rotating shaft of the cartridge; and a cylindrical rewinding shaft (4) movably stored in the rewinding shaft (4) in the axial direction. a piston (11) that rotates around the unwinding shaft axis integrally with the unwinding shaft (4); and a piston (11) whose base end is pivotally connected to the piston (11) and rotates around the unwinding shaft axis. The rewind shaft (4) is pulled out from the rewind shaft (4) through the piston (11) at a pull-out position (A) inclined with respect to the rewind shaft (4). While rotating, turn the rewind shaft (4) in the storage position (B).
) A camera equipped with a rewind mechanism consisting of a rewind lever (12, 13) housed in the shaft of the rewind lever (12, 13), and a rewind knob rotatably provided at the tip of the rewind lever (12, 13). The rewinding shaft is supported to move axially between a first and a second position with respect to the camera body, and the rewinding shaft is moved from the first position to the second position by pulling the rewinding knob in the axial direction. a back cover locking mechanism that can operate between a locked state in which the back cover is moved to the second position and an unlocked state in which the back cover is not locked, and that enters the unlocked state in conjunction with the movement of the rewind shaft to the second position; Camera back cover lock release mechanism. (2) A locking mechanism that can operate between a locked state that locks the rewind shaft in the first position and a released state that releases the lock, and that can be switched to the released state in response to an operation from outside the camera. A camera back cover lock release mechanism according to claim 1, comprising: