JPH1026794A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent a film from being inadvertently exposed by linking the opening/closing of the cartridge cover of a cartridge chamber, with the opening/ closing of the light shielding door of a film cartridge. SOLUTION: The cartridge chamber housing cartridge 1 having the light shielding door at the entrance for the film is opened in a part of a camera main body. The cartridge cover for shielding the cartridge chamber from light is provided to freely open/close. A cover opening/closing member 13 for keeping the cover in a closed state is freely slidably provided in the camera main body. Further, a light shielding door opening/closing driving member 26 for opening/ closing the light shielding door is provided. An engaging groove 49 in which a restraining member 47 is selectively engage-inserted with linking members 44 and 45 linked with the opening/closing operations of the light shielding door is provided in the cover opening/closing member. When the light shielding door is opened by the light shielding door opening/closing driving member 26, after the cover is closed, the linking members are engage-inserted in the engaging groove of the cover opening/closing member, to lock the cover opening/closing member 13.

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 film cartridge having a light-shielding door at the entrance and exit of a film, and more particularly to a mechanism for opening and closing a cartridge lid member for opening and closing a cartridge storage chamber of the camera, and opening and closing a light-shielding door of the cartridge. And a light blocking door opening / closing mechanism.

[0002]

2. Description of the Related Art For example, US Pat. No. 4,832,275
In the specification, a new type of photographic film is proposed in which the film is wound up into a cartridge and stored in a cartridge. This photographic film has an image storage area and a magnetic storage area for storing various photographing information on the film surface. When a film cartridge containing such a film is loaded into a cartridge loading section (cartridge chamber) of the camera body, the light-shielding lid at the film entrance is opened, and the film is sequentially sent out from the cartridge to take a picture. The cartridge is completely wound into the cartridge, the light-shielding lid is closed, and then taken out of the camera. The developed film, which has been developed and dried, is stored by being rewound into the cartridge again and stored in this state.

In a camera using such a film cartridge, the film cartridge is loaded into a cartridge chamber which is a cartridge loading section partially opened in the camera body. The opening of this cartridge chamber is
For example, one side edge can be freely opened and closed by a cartridge lid rotatably mounted with a hinge or the like, so that the cartridge chamber is shielded from light when the lid is closed. The cartridge lid is opened and closed by a lid opening / closing member having a locking claw that engages with the locking claw provided on the cartridge lid. The lid opening / closing member is slidably supported while being urged in a locking direction by a spring, and is configured to be operated in a direction in which the lid is opened by an external operation from the camera body.

In the above-described camera, a film cartridge is loaded into a cartridge chamber, a cartridge cover is closed, and a light-shielding door of the film cartridge is opened by a door opening / closing drive mechanism provided in the camera body to start film feeding. It is configured. In addition, after taking out the film into the cartridge, the film cartridge is taken out, the light shielding door is closed by the door opening and closing drive mechanism,
By operating the lid opening / closing member against the urging force, the locked state by the locking claw is released, and the cartridge lid can be opened.

[0005]

However, in the conventional camera using the film cartridge as described above, the cartridge lid for shielding the cartridge chamber from light can be opened and closed independently of the opening and closing operation of the light shielding door of the cartridge. Therefore, there is a problem that the film is exposed when the cartridge lid is opened with the light blocking door of the cartridge opened after the film is delivered.

A camera having an automatic film cartridge loading mechanism is known in which a light shielding door is opened by electrical control after a cartridge is loaded and a cartridge lid is closed. There is a problem that the cartridge lid is opened even if the light shielding door is opened due to a drop, an impact, a trouble in the electric control system, or the like.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and in conjunction with the opening and closing of a light-shielding door for shielding a film entrance of a film cartridge, an opening and closing operation of a cartridge lid member for shielding a chamber for storing the cartridge is performed. An object of the present invention is to obtain a camera that prevents the film from being carelessly exposed.

[0008]

In order to achieve the above object, a camera according to the present invention comprises a cartridge chamber which is opened in a part of the camera body so as to accommodate a film cartridge having a light-shielding door at a film entrance. A cartridge cover member provided on the camera body so as to be openable and closable so as to shield the cartridge chamber from light; a cover opening and closing member provided on the camera body so as to hold the cover member in a closed state; A light blocking door opening / closing drive member provided in the camera body so as to open and close the camera; a link member that operates in conjunction with the opening / closing operation of the light blocking door opening / closing drive member; and a locking member that operates with the link member. When the cartridge lid member is closed and the light shielding door is driven to open by the light shielding door opening / closing drive member, the engagement groove into which the locking member engages is formed by the lid. This is provided on the opening / closing member.

The camera according to the present invention is provided with a detecting device for detecting the opening / closing operation state of the light shielding door in conjunction with the light shielding door opening / closing driving member. Further, the camera according to the present invention includes a light blocking door opening / closing drive member, and a link member and a locking member that operate in conjunction with the light blocking door opening / closing drive member, at one end surface side of the film cartridge, the surface being perpendicular to the axial direction of the film cartridge. The lid opening and closing member is provided so as to operate in parallel with the axial direction of the film cartridge.

According to the present invention, after the cartridge cover is closed and the cartridge chamber is shielded from light, and when the light-shielding door opening / closing drive member is driven to open, the light-shielding door of the film cartridge is linked with the opening operation via the link member. By engaging the locking member with the engagement groove of the lid opening / closing member, the cartridge lid member that opens and closes the cartridge chamber is locked in a closed state, and the cartridge lid member is opened carelessly, thereby causing exposure of the film. Prevent the problem. Further, according to the present invention, when the light shielding door of the cartridge is closed, the locking member is retracted from the engagement groove in conjunction with the closing operation,
The locked state of the cartridge lid member is released, the opening operation of the cartridge lid member by the opening operation of the lid opening / closing member is enabled, and the cartridge can be taken out of the cartridge chamber.

The film cartridge is, for example, a film cartridge disclosed in US Pat. No. 4,832,275, and a light-shielding door is provided at the film entrance so as to be openable and closable. The light-shielding door of the film cartridge has a door opening and closing shaft provided on the cartridge, and the shaft end is opened and closed by engaging a driver provided on a part of the light-shielding door driving member provided on the camera body and rotating. Operate. The cartridge lid member is a member having one side edge connected by a hinge or the like so as to open and close an opening of a cartridge chamber for accommodating a film cartridge, and having a locking claw on the other side edge. The lid opening / closing member has a locking claw that engages with the locking claw of the cartridge lid member, is slidable on a part of the camera body, and is locked in a locking direction by an urging means such as a tension coil spring. Has been energized. In this lid opening and closing member,
A knob is provided for operating against the urging force by an external operation.

[0012]

1 to 4 show one embodiment of a camera according to the present invention. In these figures,
In this embodiment, as shown in FIG. 4, a cartridge chamber 11 for accommodating the film cartridge 1 is formed by opening the rear side of the camera main body 10 near one side of the camera main body 10, as shown in FIG. In order to open and close the cartridge chamber 11, there is provided a cartridge lid 12 which has one side edge rotatably swung to the camera body 10 via a hinge portion 12 a such as a hinge.

In FIG. 4, the cartridge chamber 11 is configured so that the opening of the cartridge chamber 11 is closed by a cartridge lid 12 to prevent light leakage of the film. Further, the film cartridge 1 has such a cartridge chamber 1.
1 is loaded and unloaded from the rear side of the camera body 10. Hinge portion 12a of the cartridge lid 12
As shown in FIG. 1B and FIG. 4,
A locking claw 12b is provided.

Reference numeral 13 denotes a lid opening / closing lever (lid opening / closing member) for holding the cartridge lid 12 in a closed state by engaging with the above-mentioned locking claw 12b. As shown in (b), a locking claw 13a having a shape engageable with the locking claw 12b is provided. The lid opening / closing lever 13 is slidably supported at a side edge of the opening of the cartridge chamber 11 along a direction parallel to the axis of the cartridge 1, and the locking claw 13 a is locked by a tension coil spring 14. It is urged in a direction (upward in FIG. 1) that engages with the claw 12b. 15 is the lid opening / closing lever 1
3 is a knob that can be manually operated from the outside to move the lever 13 against the urging force of the spring 14 and move the lever 13 downward from the state shown in FIG. Thus, the engagement between the locking claw 13a and the locking claw 12b is released, and the cartridge lid 12 can be opened.

The cover opening / closing lever 13 is connected to the camera body 10.
The projections 16, 16 provided on a part of the long groove 13b, 13b
, The cartridge 1 is slidable along the axial direction of the cartridge 1 and a movement range is defined. Further, a claw member 17 for locking is provided on a part of the lid opening / closing lever 13, and the claw member 17 is used to lock the lid opening / closing lever 13 so that the locking claw 13a is not locked with the locking claw 12b. It is configured so that it can be hooked at a position. That is, as shown in FIG. 1B, the claw member 17 is
3 is maintained by being locked by an engaging portion 17a provided on a part of the cartridge lid 12, and a concave portion 17b provided on a part of the locking claw 12b of the cartridge lid 12 is brought into contact with FIG. As shown in (b), the locking state is released.

Numerals 21 and 22 support the shaft 2 by engaging the shaft ends 2a and 2b of the cartridge shaft 2 which is a film winding shaft of the cartridge 1 disposed above and below the cartridge chamber 11. Fork and lower fork. Here, the lower fork 22 that supports the lower shaft end 2 a of the cartridge shaft 2 of the cartridge 1 is fitted to a lower fork shaft 25 fixed by caulking or the like to a substrate 24 via a lower fork spring 23. I agree. The substrate 24 is screwed to an arm 18 provided at the lower end of the lid opening / closing lever 13. The lower fork 22 is pressed against the arm 18 by the urging force of the lower fork spring 23 and is supported so as to be movable in the vertical direction.

An upper fork 21 rotatably supporting the shaft end 2a of the cartridge shaft 2 in the cartridge 1.
Has a key groove structure, which engages with the shaft end 2a of the cartridge shaft 2 to rotate it. The upper fork 21 is connected to a gear (not shown), and is connected via a gear train to a film feeding motor (not shown) for winding and rewinding the cartridge shaft 2.

A driver 26 facing the inside of the cartridge chamber 11 in parallel with the upper fork 21 opens and closes a light-shielding door (not shown) at the film entrance of the cartridge 1.
The light shielding door opening / closing key portion 3 of the cartridge 1 is formed in the same shape. The driver 26 has a coaxial gear 26a connected to a gear 27 and a driver opening / closing drive motor (both not shown) via a gear train constituting a light shielding door opening / closing drive mechanism. This motor may be the same as or different from the film feeding motor.

In FIGS. 1 (a) and 1 (b), reference numeral 31 denotes a scraping lever of the cartridge 1 which is loaded into the cartridge chamber 11 and rises with the lid opening / closing lever 13 as shown in FIG. ) And (b), an engaging piece 31a for pulling out and lowering the cartridge 1 which is engaged with the upper fork 21 and the driver 26.
Having. That is, the cartridge 1 includes the driver 26,
When it enters the upper fork 21, it becomes a kind of locked state,
It cannot be removed unless it is pulled out and moved in the axial direction. The scraping lever 31 is a member for pulling out the cartridge 1 at this time.

The scraping lever 31 is supported by the camera body 10 so as to be movable in parallel with the axial direction of the cartridge 1 like the lid opening / closing lever 13. In the drawings, reference numerals 32 and 32 denote protrusions provided on the camera body 10 side, and 31.
Reference numerals b and 31b denote long grooves into which the projections 32 and 32 are engaged. The scraping lever 31 slides within a predetermined range in parallel with the lid opening / closing lever 13. Further, the scraping lever 31 is also urged by a scraping lever spring 33 in the same direction (upward in the figure) as the lid opening / closing lever 31.

An engaging arm portion 31c provided at the lower end of the scraping lever 31 is engaged with an engaging portion 34 protruding from the side of the lid opening / closing lever 13, thereby operating in conjunction with the lid opening / closing lever 13. I do. That is, in the state where the cartridge lid 12 shown in FIG. 1B can be opened, together with the lid opening / closing lever 13, the scraping lever 31 moves downward against the urging force of the spring 33 and stops in that state. . When the lid opening / closing lever 13 moves upward to lock the cartridge lid 12, the scraping lever 31 is also moved by the spring 33.
3 (a) and 3 (b).

FIGS. 2A and 2B show FIGS. 1A and 3B, respectively.
FIG. 3 is a perspective view of FIG. 3A as viewed from above, showing an interlocking relationship between a light-shielding door opening / closing drive mechanism which characterizes the present invention and a lid opening / closing lever 13 which is a lid opening / closing member of the cartridge lid 12. Here, FIG. 2A shows a case where the driver 26 has closed the light shielding door of the cartridge 1. In this figure, reference numeral 40 denotes an engaging piece integral with the driver 26, 41 and 42 denote a closing boss and an opening boss provided on the camera body 10, and the driver 26 denotes these bosses 41 and 42.
The angle of rotation is regulated between them, and they reciprocate. FIG. 2B shows a case where the light blocking door is open. The light-shielding door of the cartridge 1 has the same phase as the rotation angle of the driver 26.

The gear 26a of the driver 26 has a gear 4
3 One end of a link 44 is engaged with the gear 43, and the other end of the link 44 is connected to a cam 45.
To form a link mechanism. Here, FIG.
4A and 4B, reference numeral 46 denotes a detection switch for detecting the rotation of the driver 26, which is configured to turn on and off in conjunction with the movement of the cam 45. FIG.
The detection switch 46 is turned off when the light shielding door is closed as shown in FIG. 2A, and is turned on when it is opened as shown in FIG.

Reference numeral 47 denotes a rotary lock member serving as a locking member for locking the lid opening / closing lever 13 with the cartridge lid 12 closed, and is biased by a spring 48 to a retracted state in which it is not always locked. A lock piece 47a is provided at the tip of the lock member 47.
Is engaged with an engagement groove 49 formed in a part of the lid opening / closing lever 13 by the cam action of the cam 45, thereby locking the lever 13. This state is shown in FIGS. 2B and 3A.

In the above configuration, FIG.
When the cartridge lid 12 is closed with the cartridge 1 shown in (b) loaded in the cartridge chamber 11 while the cartridge lid 12 is open, the state shown in FIGS. 3A and 3B is obtained. That is, the lid opening / closing lever 13 is released from being caught by the claw member 17 being removed by the concave portion 17 b of the locking claw 12 b of the lid 12, and is moved upward in the drawing by the urging force of the spring 14. Then, before the arm portion 18 comes into contact with the cartridge 1, the restriction is restricted by the protrusion 16 of the camera body 10 and the long groove 13 b.

The lower fork 22 pushes up the cartridge 1 with a lower fork spring 24, rotatably supports the shaft end 2 b of the cartridge shaft 2, and urges the upper fork 21 side. At this time, the other shaft end 2a of the cartridge shaft 2
Is rotatably supported by the upper fork 21, and the light shielding door opening / closing key 3 of the cartridge 1 is inserted into the driver 26. On the other hand, the scraping lever 31 is
Is pushed up, the locking of the lid opening / closing lever 13 is released, and the lid opening / closing lever 13 is pulled up in the same direction as the cartridge 1.

In this state, both ends of the cartridge shaft 2 of the cartridge 1 are moved up and down,
22 rotatably supported. The driver 26
Is inserted, the light-shielding door is opened, and the lock piece 47a of the lock member 47 interlocked with the driver 26 engages with the engagement groove 49 to lock the lid opening / closing lever 13.

Here, this locked state is shown in FIG.
It is obtained as shown in (b). That is, in FIG. 2A in which the light shielding door of the cartridge 1 is closed, the rotation of the gear 26 a integral with the driver 26 is stopped by the engagement piece 40 being regulated by the stopper by the boss 41. . At this time, the cam 45 at the other end of the link 44 turns off the detection switch 46 and retracts the lock member 47 from the lid opening / closing lever 13. In this state, when the detection switch 46 is turned off, a signal to stop driving the motor is sent to a CPU (not shown).

In this state, as described above, when the driver 26 engages with the light shielding door opening / closing key portion 3 by raising the lid opening / closing lever 13 after the cartridge 1 is loaded, the driver 26
Rotates and the light blocking door is opened. At this time, the driver 26
When the gear 26a rotates, the cam 45 connected by the link 44 via the gear 43 moves the lock member 47, and locks the lid opening / closing lever 13 by engagement of the lock piece 47a into the engagement groove 49. Then, the movement of the lid opening / closing lever 13 is prohibited. This state is shown in FIGS. 3A and 3B and FIG.
This is the state shown in FIG.

Therefore, when the light shielding door of the cartridge 1 is opened, the cartridge lid 12 is always closed and the lid opening / closing lever 13 is locked. When the lock member 47 locks the lid opening / closing lever 13 and further opens the light shielding door, the detection switch 46 slides on the cam surface of the cam 45 to turn on, and a signal to stop driving the motor is issued by the CPU (FIG. (Not shown).

The present invention is not limited to the structure described in the above embodiment, and it goes without saying that the shape and structure of each part can be appropriately modified and changed. For example, in the above-described embodiment, the lock member 47 is transmitted to the lock member 47 via the cam 45. However, as shown in FIG. 5, the lock member 47 is directly pressed by the cam portion 45b of the link 44 to obtain the locked state. Is also good. In FIG. 5, the link 44
, The detection switch 46 is turned on / off by a cam portion 45a provided in the camera.

Further, in the above-described embodiment, the cartridge lid 12 is provided on the back side of the camera main body 10, but it may be on the side of the camera main body 10. Further, the moving amount of the lid opening / closing lever 13 and the moving amount of the lower fork 22 may be different from each other via a gear train. Further, the lower fork 22, the driver 26, and the upper fork 21 may be exchanged, and the driver 26, the upper fork 21, and the lid opening / closing lever 13 may be linked.

[0033]

As described above, according to the camera of the present invention, a cartridge chamber for accommodating a film cartridge, a cartridge lid member which can be opened and closed by the camera body so as to shield the cartridge chamber from light, and a closed state thereof. A light-shielding door opening / closing drive member that opens and closes the light-shielding door of the cartridge, a link member that operates in conjunction with the opening and closing operation of the light-shielding door opening / closing drive member, and operates with the link member. And a locking member for
The engagement groove into which this locking member engages when the light shielding door is opened is
Since the cover opening / closing member is provided, the following advantageous effects can be obtained.

According to the present invention, the cartridge cover for opening and closing the cartridge chamber by engaging the locking member with the engagement groove of the cover opening / closing member via the link member interlocking with the opening operation of the light shielding door of the film cartridge. Locking the member in the closed state prevents the problem of inadvertent opening of the cartridge lid member and exposure of the film. Further, according to the present invention, when the light shielding door of the cartridge is closed, the locking member is retreated from the engagement groove in conjunction with the closing operation, the locked state of the cartridge lid member is released, and the opening and closing operation of the lid opening / closing member is performed. The cartridge cover member can be opened, and the cartridge can be removed from the cartridge chamber.

In particular, according to the present invention, the lid opening / closing member and the cartridge lid member are mechanically locked by the locking member via the link member interlocking with the opening / closing of the light shielding door.
For example, when the light shielding door is in the open state, the cartridge lid member is not opened carelessly due to a trouble in the electric system. In other words, according to the present invention, when the cartridge lid is opened in a state where the lid opening / closing member is not locked, the light shielding door of the cartridge is always closed, and when the light shielding door of the cartridge is opened, the lid opening / closing member is opened. Is securely locked to keep the cartridge lid closed, thereby eliminating the problem of inadvertent exposure of the film.

Further, according to the present invention, by providing a detecting device for detecting the opening / closing operation state of the light shielding door in conjunction with the light shielding door opening / closing drive member, the opening / closing state of the light shielding door of the cartridge is reliably detected, and The electric motor as the drive source for opening and closing the door, the electric motor as the drive source for winding up and extending the cartridge shaft, and other electric systems can be reliably controlled.

Further, according to the present invention, the light-shielding door opening / closing drive member and the link member and the locking member operating in conjunction with the light-shielding door opening / closing drive member are provided on either one end surface of the film cartridge in a direction perpendicular to the axial direction of the film cartridge. The cover opening and closing member is provided so as to operate in parallel with the axial direction of the film cartridge, so that the opening and closing mechanism of the cartridge cover member for opening and closing the storage chamber of the film cartridge and the light shielding of the cartridge are provided. The structure of the loading portion of the film cartridge by the light-shielding door opening / closing mechanism for opening and closing the door can be made compact.

[Brief description of the drawings]

1A and 1B show an embodiment of a camera according to the present invention, wherein FIG. 1A is an enlarged sectional view of a main part showing a cartridge chamber for storing a film cartridge of the camera, and FIG.
FIG.

2A and 2B show an embodiment of a camera according to the present invention, wherein FIG. 3A is a plan view of a main part of the state of FIG. 1A seen from above, and FIG. It is a principal part top view corresponding to (a).

3A and 3B show an embodiment of a camera according to the present invention, wherein FIGS. 3A and 3B are an enlarged cross-sectional view of a main part and a side view showing a state in which a cartridge lid is closed from the state of FIG. .

FIG. 4 is a view of the entire camera, showing one embodiment of the camera according to the present invention, as viewed from the rear side.

FIG. 5 is a plan view showing another embodiment of the camera according to the present invention and corresponding to FIG. 2B.

[Explanation of symbols]

1. Film cartridge, 2. Cartridge shaft, 2.
a, 2b: shaft end portion, 3: light-shielding door opening / closing key portion, 10: camera body, 11: cartridge chamber, 12: cartridge lid (cartridge lid member), 12a: hinge portion, 12b ...
Locking claw, 13 ... Lid opening / closing lever (lid opening / closing member), 13a ...
Locking claw, 13b: long groove, 14: tension coil spring (biasing means), 15: knob, 16: protrusion, 17: hooking claw, 21, 22, upper, lower fork, 23: lower fork spring , 24 ... board, 25 ... lower fork shaft, 26 ... light shielding door opening / closing driver, 27 ... gear, 31 ... scraping lever, 31a ... engagement piece, 31b ... long groove, 32 ... protrusion, 3
Reference numeral 3 represents a scraping lever spring, 34 an engaging portion, 40 an engaging piece, 41 and 42 a boss, 43 a gear, 44 a link (link member), 45 a cam (link member), and 45a and 45.
b: cam part, 46: detection switch (detection device), 47:
Lock member (locking member), 47a: lock piece, 48: spring, 49: engagement groove.

Claims (3)

[Claims] 1. A camera using a film cartridge having a light-shielding door at an entrance and exit of a film, a cartridge chamber for storing the film cartridge provided to be opened in a part of a camera body, and a light-shielding chamber for the cartridge chamber. A cartridge lid member slidably provided on the camera body, a lid open / close member slidably provided on the camera body to hold the cartridge lid member in a closed state and release the cartridge lid member, A light blocking door opening / closing drive member disposed in the camera body for opening and closing the light blocking door of the film cartridge; a link member that operates in conjunction with the opening / closing operation of the light blocking door opening / closing drive member; An operating locking member, and closing the cartridge lid member to form the light shielding door opening / closing drive member. A camera, wherein the lid opening / closing member is provided with an engagement groove into which the locking member engages when the light shielding door is driven to open. 2. The camera according to claim 1, further comprising a detection device that detects an opening / closing operation state of the light shielding door by operating in conjunction with the light shielding door opening / closing driving member. 3. The camera according to claim 1, wherein the light-shielding door opening / closing drive member, the link member and the locking member operating in conjunction with the light-shielding door opening / closing drive member are provided on one end surface side of the film cartridge in the axial direction of the film cartridge. And a cover opening / closing member provided so as to operate in parallel with an axial direction of the film cartridge.