JPH09222651A - Camera provided with cartridge cover - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a light shielding door driving means for opening/closing the light shielding door of a cartridge from being driven or operated, when a cartridge cover is opened by providing the light shielding door driving means and a locking means. SOLUTION: In a state where the locking of the cartridge cover is released, a locking pawl 55 is located to attain engagement with a slide lever locking pawl 75. When the cartridge cover is turned in an opening direction, in the released state of locking, the top end part 73 of a locking lever 71 is released from a peripheral wall 27 and projected by the energizing force of a spring 77. In other words, the slide lever locking pawl 75 of the lever 71 is engaged with the locking pawl 55 of a lever 51, to lock it at a light shielding door closing position. In this locking state, a door driver 41 can not be turned, so that while the cartridge cover is opened, a light shielding door driving lever 42 is never turned from the light shielding door closing position. Thus, at the time of closing the cartridge cover, the door driver 41 is surely engaged with a connecting part, so that the driver 41 and the connecting part are never damaged.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a cartridge lid for opening and closing a cartridge chamber for loading a film cartridge having a light-shielding door.

[0002]

2. Description of the Related Art In recent years, a film cartridge has been developed in which a film is normally completely contained in a cartridge and a film door is closed by a light-shielding door so that the film in the cartridge is not exposed to light. One example is shown in FIGS. In this film cartridge 10, a film is wound around a cartridge spool (not shown) that is rotatably housed in a cylindrical cartridge body 11. In the cartridge spool, the hollow shaft portions 13a and 13b at both end portions of the cartridge spool 1 are
The shafts are fitted to shafts mounted on both end faces of the shaft 1 and are rotatably supported.

A film entrance / exit 15 is provided on one side of the cartridge body 11.
Film comes in and goes out from 5. This film entrance / exit 15
Includes a light-shielding door 17 for shielding the film entrance / exit 15 to prevent the film in the cartridge body 11 from being exposed to light.
Is installed. The light-shielding door 17 is a plate-like member that has shafts 17a and 17b provided at both ends pivotally supported by shafts 12a and 12b attached to the upper and lower end surfaces of the cartridge body 11, and opens and closes the film inlet / outlet 15 by rotation. Is. One shaft portion 17b is formed as a connecting shaft 17b having a key groove for rotationally driving the light shielding door 17.

A camera capable of using such a film cartridge is disclosed in, for example, Japanese Patent Application Laid-Open No. 7-5542. This type of camera has a cartridge chamber for accommodating a film cartridge in the camera body, a cartridge lid for opening and closing the cartridge chamber, and a lock member for locking the cartridge lid with the cartridge chamber closed. Further, in this type of camera, when a film cartridge is loaded in the cartridge chamber and the cartridge lid is closed, the camera has a door driver shaft that fits in the key groove of the hollow shaft portion 17b, and when locked by a lock member,
There is provided a light-shielding door opening mechanism that opens the light-shielding door of the film cartridge by rotating the connecting shaft 17b in conjunction with the movement of the lock member.

However, the conventional cartridge lid is
The lock member could be operated with the cartridge lid open, and the door driver shaft of the light-shielding door opening mechanism could be rotated. Therefore, if the cartridge lid is closed when the direction of the door driver shaft is not aligned with the key groove of the connecting shaft 17b, the door driver shaft cannot be fitted to the connecting shaft 17b, and the door driver shaft and the connecting shaft 17b of the cartridge are closed. Alternatively, the light blocking door 17 may be damaged.

[0006]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a camera having a cartridge lid which cannot drive or operate the light-shielding door driving means for opening and closing the light-shielding door of the cartridge when the cartridge lid is open.

[0007]

SUMMARY OF THE INVENTION The invention according to claim 1 which achieves this object is a camera capable of using a film cartridge having a light-shielding door at a film entrance / exit, and opening / closing a cartridge chamber for accommodating the film cartridge. Cartridge lid; light-shielding door driving means provided on the cartridge lid for engaging and disengaging the light-shielding door's opening / closing connection portion to open and close the light-shielding door; and the light-shielding door when the cartridge lid is opened. It is characterized in that it has lock means for locking the drive means in the light-shielding door closed position.

According to the present invention, when the cartridge lid is in the closed position, the elastic member is movable to a locking position for preventing the opening of the cartridge lid and a releasing position for permitting the opening of the cartridge lid. Is provided with a cartridge lid locking means that is constantly urged in the locking position direction by an external operation and is movable toward the release position by an external operation, and the light shielding door driving means interlocks with the movement of the cartridge lid locking means. The door may be opened and closed, and the locking means may include a locking member that locks the light-blocking door driving means at the light-blocking door closed position when the light-blocking door driving means moves to the light-blocking door closed position. Further, the lock means is configured to disengage the engagement member when the cartridge lid is in the closed position. Then, immediately before the cartridge lid moves from the open state to the closed position,
The lock means moves in the unlocking direction to allow the light blocking door driving means to move, and the cartridge lid locking means moves in the cartridge lid locking direction to move the light blocking door driving means to the light blocking door. Drive in the opening direction. When the cartridge lid locking means is driven in the locking release direction from the state in which the cartridge lid is locked by the cartridge lid locking means in the closed position, the light blocking door driving means closes the light blocking door. When the cartridge lid moves in the opening direction from the closed position in this state, the lock means locks the light shielding door driving means in the light shielding door closed position.
More specifically, the light-shielding door driving means includes a door driver pivotally supported by a cartridge lid and a door driver integrally formed with the door driver and exposed from one end surface of the film cartridge. The opening / closing connecting portion is provided with a light-shielding door drive lever that is fitted when the cartridge lid is closed and that can drive the light-shielding door to open and close.

[0009]

DESCRIPTION OF THE PREFERRED EMBODIMENTS The present invention will be described below with reference to the drawings. FIG. 3 is a perspective view showing the external appearance of an embodiment of a camera to which the cartridge lid locking structure of the present invention is applied.
This camera is a so-called lens shutter type camera, and on the back surface of the camera body (camera body) 21, an eyepiece portion 23 of a finder, an LCD panel 24 for displaying shooting information such as the number of films, an exposure mode, an exposure mode, etc. An operation button 25 for switching the functions of the camera is provided. At the bottom of the camera body 21, a cartridge chamber 26 for accommodating the film cartridge 10 (see FIG.
(See) and the cartridge lid 31 for opening and closing the opening is attached. On the back surface of the camera body 21, a cartridge lid lock release knob 60 for unlocking the first locking mechanism that locks the cartridge lid 31 in the illustrated closed state is provided.
It is mounted so that it can slide in the left-right direction with respect to 1.
The film cartridge 10 is loaded into the cartridge chamber 26 from the upper side shown in FIG. 1, and the upper surface shown in FIG. 2 faces the cartridge lid 31. Also, the present invention
A single-lens reflex camera may be used as long as the camera can use this type of film cartridge 10, and the type of the camera is not limited.

An embodiment of the cartridge lid of the present invention will be described with reference to FIGS. 4 to 9. 4, 5, and 7 are views of the cartridge lid 31 as viewed from the inside of the cartridge chamber 26, FIGS. 6 and 8 are front views of the locking portion of the embodiment, and FIGS. FIG. 4 is a cross-sectional view of a main part of the present embodiment, cut at different parts and viewed from opposite directions.

The cartridge lid 31 is provided in the cartridge chamber 2
6 is openably and closably attached to the camera body 21 via a shaft 31c. The cartridge chamber 26 is formed by a cartridge chamber block 27 fixed to the camera body 21. A peripheral wall portion 32 for light shielding is formed slightly inside the outer peripheral edge portion on the inner side surface (surface on the cartridge chamber side) of the cartridge lid 31, and is on the opposite side of the shaft 31c and outside the peripheral wall portion 32. Locking claws 33 for locking the cartridge lid 31 in the closed position are formed. Further, on the inner surface of the cartridge lid 31, a spool (cartridge) support shaft 34, a door driver 41 as a light-shielding door driving means for driving the light-shielding door of the film cartridge to open and close, a slide lever 51 for driving the door driver 41, and a slide lever. A lock lever 71 is mounted as a locking means for locking 51 at the light-shielding door closed position.

The locking claw 33 is provided on the camera body 21 when the cartridge lid 31 is closed.
The cartridge lid locking claw 63 of No. 1 constitutes a cartridge lid locking mechanism that prevents the cartridge lid 31 from opening.

The spool support shaft 34 is used for the cartridge lid 3.
When 1 is closed, the shaft 13b of the film cartridge 10 loaded in the cartridge chamber 26 is fitted and rotatably supported. The spool support shaft 34 is erected by a screw connection with a boss 31 a that is provided near the center of the cartridge lid 31. Further, the spool support shaft 34 is provided with a spool pressing plate 35 for pressing the cartridge 10.
Are fitted while being elastically biased by the spring 36.

The door driver 41 includes the cartridge lid 3
In the closed state in which 1 is closed, the operation lever 61 rotates in conjunction with the movement of the slide lever 51 that moves in association with the movement in the locking direction and the movement in the release direction to open / close the light shielding door 17 of the film cartridge 10. To do.

The operating lever 61 has a pair of elongated holes 62a and 62b extending in parallel with each other in the longitudinal direction, and these elongated holes 62a and 62b are fitted into pins 29a and 29b planted in the cartridge chamber block 27. Combined and supported slidably. By this sliding movement of the operation lever 61, the cartridge lid locking claw 63 engages with and disengages from the locking claw 33. And this operation lever 61 is
By the spring 66 hung between the cartridge chamber block 27 and the cartridge chamber block 27, the cartridge lid locking claw 63 is always elastically moved and biased in the direction of being engaged with the locking claw 33. The cartridge lid lock release knob 60 is formed integrally with the operation lever 61.

Further, the operating lever 61 has a locking projection 54 of the slide lever 51 mounted on the cartridge lid 31.
Is provided with a concave portion 65 in which is loosely fitted. The concave portion 65 is one contact surface (inner wall surface) 65a during the movement of the operation lever 61 moving from the release position (lock release position) to the lock position and during the movement process of moving from the lock position to the release position. , 65b abut the locking projection 54 so that the locking projection 54 is locked by the operating lever 61.
And the door driver 41 is rotated.

The door driver 41 has a cartridge lid 3
1 is an L-shaped front lever that is rotatably fitted and supported by a shaft 31b that is provided on the inner side surface of the protrusion 1. On the surface of the door driver 41 on the side of the cartridge chamber 26, a light-shielding door drive lever 42 having a shaft 31b as an axis is provided in a protruding manner. The light-shielding door drive lever 42 is formed in a shape and position that fits in the key groove of the hollow shaft 17b when the cartridge lid 31 is closed. Further, a projection 43 that slidably fits into the long groove 53 of the slide lever 51 is formed at one tip of the door driver 41, and a torsion spring 45 is provided at a projection 44 projecting at the other tip. One end of is hung. The other end of the torsion spring 45 is hooked on a protrusion 37 protruding from the cartridge lid 31,
The door driver 41 is biased to rotate.

The torsion spring 45 urges the door driver 41 to rotate, but when the end portion 44 crosses a line (reversal position) connecting the rotation center of the door driver 41 and the protrusion 37, the door spring moves in the direction beyond the line. It is a spring that biases the driver 41 to rotate, and the biasing direction is reversed. The door driver 41 opens and closes the light shielding door 17 by the biasing force of the torsion spring 45.

The slide lever 51 has a pair of guide pins 38 in which a long hole 52 extending in the longitudinal direction is provided on the cartridge lid 31 so as to be spaced apart by a predetermined length in a direction parallel to the shaft 31a.
The long hole 52 and the guide pin 3 are fitted to the a and 38b.
It is slidably guided in a direction parallel to the cartridge lid 31 by 8a and 38b. Further, the slide lever 51 constitutes a slider crank mechanism in which a long groove 53 extending in a direction substantially orthogonal to the sliding direction is fitted to the protrusion 43 of the door driver 41 and slides when the door driver 41 rotates.

The slide lever 51 is provided with a locking projection 54 extending in the direction opposite to the door driver 41.
When the cartridge lid 31 is closed, the locking projection 54 passes through the slit 28a of the lock wall 28 formed in the cartridge chamber block 27 and enters the concave portion 65 of the operation lever 61 which is slid to the unlocked position (Fig. 7 and 8). The position of the slide lever 51 is a lock release position (release position) that allows the cartridge lid 31 to be opened.

In the first process in which the operating lever 61 slides from the unlocked position toward the locked position, the recess 65 is formed.
One of the contact surfaces 65a abuts on the locking projection 54 and slides the locking projection 54, and thus the slide lever 51, in the direction of opening the light blocking door.
The sliding of the slide lever 51 causes the door driver 41 to rotate in the direction of opening the light-shielding door against the biasing force of the torsion spring 45, and when the door driver 41 exceeds the reverse position, the biasing force of the torsion spring 45 causes the light-shielding door to move. The door driver 41 is reversed in the opening direction and the biasing force of the torsion spring 45 causes the door driver 41 to rotate in the light-shielding door opening direction. And the slide lever 51 is also the door driver 41.
The locking projection 54 moves to the back side of the lock wall 28 in association with the rotation of the lock wall 28. The position of the slide lever 51 is a locking position where the locking projection 54 contacts the lock wall 28 and prevents the cartridge lid 31 from opening. At this locking position, the contact surfaces 65a and 65b of the concave portion 65 do not contact the locking projection 54 or do not push in the locking direction even if they contact.

Further, the slide lever 51 has a long groove 53.
A locking claw 55 is provided so as to project from the end portion on the opposite side to. The locking claw 55 engages with the slide lever locking claw 75 of the lock lever 71 to lock the slide lever 51 at the light-shielding door closed position.

The lock lever 71 is fitted in the guide pins 39a and 39b projectingly provided on the cartridge lid 31 with the long hole 72 formed in the longitudinal direction separated from each other in the direction substantially orthogonal to the sliding direction of the slide lever 51. It is supported slidably in a direction substantially orthogonal to the sliding direction. The lock lever 71 includes the slide lever locking claw 7
5 is biased by the spring 77 in the direction in which the engaging claw 55 is engaged, and the protrusion 73 forms the notch 32 a formed in the peripheral wall 32.
To the outside of the peripheral wall 32. When the cartridge lid 31 is closed, the protruding portion 73 is slidably in contact with the peripheral wall edge portion 27a of the cartridge chamber 26 to release the engagement between the slide lever locking claw 75 and the locking claw 55. A taper portion 72 a for sliding 71 is provided.

The operation of this embodiment will be described in more detail. 5 and 6 show a state in which the film cartridge 10 is loaded in the film cartridge chamber 26 and the cartridge lid 31 is closed, so that the film can be photographed. In this image-capable state, the door driver 41 rotates to the light-shielding door open position where the light-shielding door 17 is opened by the biasing force of the torsion spring 45, and the locking protrusion 54 moves to the lock position facing the lock wall 28. On the other hand, the operating lever 61 is moved to the locking position where the cartridge lid locking claw 63 is engaged with the locking claw 33 by the urging force of the lock spring 66.

The lock lever 71 has a tapered portion 7
3a is pushed by the end portion of the opening edge portion 27a and retreats against the biasing force of the spring 77, and the tip of the protruding portion 73 is opened at the opening edge portion 27a.
Is held in the unlocked position where it abuts the inner peripheral surface of the.

In this locked state, the film in the film cartridge 10 is fed out from the film inlet / outlet 15 by a film feeding means (not shown), and a known photographing means photographs the film. When the photographing is completed, the film is rewound into the film cartridge 10 from the film entrance / exit 15 by the film feeding means. During this rewinding, the locked state of FIGS. 5 and 6 is maintained.

After the rewinding is completed, the photographer slides the operation lever 61 in the unlocking direction (release position direction). Then, during sliding, the other contact surface 65b of the recess 65 abuts on the locking projection 54 and moves the locking projection 54, and thus the slide lever 51 in the unlocking direction facing the slit 28a, and the door driver Reference numeral 41 rotates in the direction of the light-shielding door closing position that closes the light-shielding door 17 against the biasing force of the torsion spring 45.

The door driver 41 is a torsion spring 45.
When the torsion spring 45 is rotated beyond the reversal position, the torsion spring 45 reverses the bias and the torsion spring 45 urges the door driver 41 to rotate in the direction of closing the light blocking door 17. By the reversed biasing force of the torsion spring 45, the light blocking door drive lever 42 closes the light blocking door 17, and the slide lever 51 moves to the lock release position where the locking projection 54 faces the slit 28a. When the operation lever 61 is slid further, the cartridge lid locking claw 63
Disengages from the locking claw 33 and enters the unlocked state (Fig. 7,
8). In this unlocked state, the cartridge lid locking claw 63 is disengaged from the first locking claw 33, and the locking projection 54
Can pass through the slit 28a, the cartridge lid 3
1 can be opened.

On the other hand, in this unlocked state, the locking claw 55
Is in a position where it can be engaged with the slide lever locking claw 75.
When the cartridge lid 31 is rotated in the unlocking state in the unlocked state, the tip portion 73 of the lock lever 71 is moved to the peripheral wall 27a.
And is projected by the biasing force of the spring 77. That is, the slide lever locking claw 75 of the lock lever 71 engages with the locking claw 55 of the slide lever 51, and the slide lever 51 is locked at the light blocking door closed position. In this locked state, the door driver 41 cannot be rotated, so while the cartridge lid 31 is open,
The light blocking door drive lever 42 does not rotate from the light blocking door closed position.

The operation of closing the cartridge lid 31 is as follows. When the cartridge lid 31 is rotated in the closing direction, the taper portion 73a of the lock lever 71 makes sliding contact with the peripheral wall edge portion 27a, and the lock lever 71 is pushed against the urging force of the spring 77, and the slide lever locking pawl 75.
Is released from the locking claw 55. On the other hand, the cartridge lid locking claw 63 reaches a position where it can be engaged with the locking claw 33 (FIG. 7,
8). Therefore, when the slide lever locking claw 75 is disengaged from the locking claw 55, the operation lever 61 slides in the locking position direction by the biasing force of the spring 66, and the cartridge lid locking claw 63 engages with the locking claw 33. , The cartridge lid 31 is locked in the closed position (see FIGS. 5 and 6). Moreover, when the operation lever 61 moves in the locking position direction, the one contact surface 65a of the concave portion 65 contacts the locking projection 65a and slides the slide lever 51 toward the light blocking door closing position direction. The urging force of the torsion spring 45 rotates the light-blocking door 17 to open the light-blocking door 17 to open the light-blocking door 17, and the locking projection 54 moves to a lock position facing the lock wall 28 (FIGS. 5 and 6).
reference).

7 and 8 show the state where the film is completely wound into the cartridge, but when the lock lever 61 is slid to the unlocked position with the film pulled out from the cartridge, the film entry / exit 15 Since the film is pulled out from the light shielding door 17, the light shielding door 17 contacts the film and cannot be rotated to the closed position by the biasing force of the torsion spring 45. That is, since the door driver 41 cannot rotate to the position where the light blocking door 17 can be completely closed, the slide lever 51 cannot slide to the lock release position where the locking projection 54 can pass through the slit 28a. Therefore, even if the cartridge lid lock release knob 60 is slid to the lock release position in the middle of shooting, the cartridge lid 31 does not open,
The film pulled out from the cartridge is not exposed.

[0032]

As is clear from the above description, the present invention
A camera using a film cartridge having a light-shielding door at a film entrance / exit, the cartridge lid for opening / closing a cartridge chamber for accommodating the film cartridge, and the drive for opening / closing the light-shielding door by engaging a connecting portion of the light-shielding door. The cartridge lid is opened because the light-shielding door driving means provided on the cartridge lid and the locking means for locking the light-shielding door driving means in the light-shielding door closed position when the cartridge lid is opened are provided. The light-shielding door driving means does not move from the light-shielding door closed position during the operation. Therefore, when closing the cartridge lid, the light-shielding door driving means surely engages with the connecting portion,
It does not damage the light-shielding door driving means and the connecting portion.

[Brief description of drawings]

FIG. 1 is a perspective view showing an outline of a film cartridge used in a camera of the present invention.

FIG. 2 is a perspective view showing the same film cartridge as seen from upside down positions.

FIG. 3 is a perspective view showing an external appearance of an embodiment of a camera to which the cartridge lid locking structure of the present invention is applied.

FIG. 4 is a rear view showing the cartridge lid of the same embodiment as seen from inside the cartridge chamber.

FIG. 5 is a rear view showing the cartridge lid of the same embodiment as seen from inside the cartridge chamber.

FIG. 6 is a front view showing the main part of the cartridge lid locking mechanism of the embodiment.

FIG. 7 is a rear view showing the cartridge lid of the same embodiment as seen from inside the cartridge chamber.

FIG. 8 is a front view showing the main part of the locking mechanism of the cartridge lid of the same embodiment.

9 is a cross-sectional view showing a main part of the embodiment shown in FIG.

FIG. 10 is a cross-sectional view showing a main part of the embodiment shown in FIG. 4 cut at a portion different from that of FIG. 9 and viewed from the opposite direction.

[Explanation of symbols]

 10 film cartridge 11 cartridge body 15 film entrance / exit 17 light-shielding door 17b light-shielding door drive shaft 21 camera body 26 cartridge chamber 28 lock wall 31 cartridge lid 33 locking claw 41 door driver 42 light-shielding door drive lever 45 torsion spring 51 slide lever 54 Stop protrusion 55 Lock claw 61 Operation lever 63 Cartridge lid locking claw 71 Lock lever 75 Slide lever lock claw

Claims (6)

[Claims] 1. A camera capable of using a film cartridge having a light-shielding door at a film entrance / exit, the cartridge lid opening / closing a cartridge chamber for accommodating the film cartridge; engaging with an opening / closing connection portion of the light-shielding door. A light-blocking door drive means provided on the cartridge lid for opening and closing the lever light-blocking door; and a lock means for locking the light-blocking door drive means at the light-blocking door closed position when the cartridge lid is opened;
A camera having a cartridge lid, which is characterized by including. 2. The camera according to claim 1, further capable of moving to a locking position for preventing the opening of the cartridge lid and a releasing position for permitting the opening of the cartridge lid when the cartridge lid is in the closed position. A cartridge lid locking means that is constantly urged in the locking position direction by an elastic member and is movable in the releasing position direction by an external operation, wherein the light-shielding door driving means moves the cartridge lid locking means. And driving the light-blocking door to open and close, and the locking means includes a locking member that locks the light-blocking door drive means in the light-blocking door closed position when the light-blocking door drive means moves to the light-blocking door closed position. A camera with a cartridge lid that is characterized by being. 3. The locking means according to claim 2,
A camera with a cartridge lid, wherein the engagement member is disengaged when the cartridge lid is in the closed position. 4. The lock mechanism according to claim 2, wherein the lock means is moved in a direction for releasing the lock just before the cartridge lid is moved from the open state to the closed position, and the movement of the light shielding door drive means is allowed. A camera having a cartridge lid, wherein the cartridge lid locking means moves in the cartridge lid locking direction to drive the light blocking door driving means in conjunction with the light blocking door opening direction. 5. The cartridge lid locking means according to claim 4, when the cartridge lid locking means is driven in a locking release direction from a state in which the cartridge lid is locked by the cartridge lid locking means at the closed position, The light-blocking door driving means is interlocked with the light-blocking door closing position, and when the cartridge lid moves in the opening direction from the closing position in this state, the locking means moves the light-blocking door driving means to the light-blocking door closing position. A camera with a cartridge lid characterized by locking. 6. A film driver according to any one of claims 1 to 5, wherein the light-shielding door driving means is formed integrally with the door driver pivotably supported by a cartridge lid, and the film driver. A light-shielding door drive lever, which is exposed from one end surface of the cartridge, is provided with an opening-and-closing connecting portion of the light-shielding door, which is engaged when the cartridge lid is closed and can drive the light-shielding door to open and close. A camera equipped with a cartridge lid.