JPH11142932A - Mechanism for opening and closing cover of cartridge chamber - Google Patents

Abstract

PROBLEM TO BE SOLVED: To prevent respective members, etc., related to the opening/closing of a cover from being damaged by erroneous operation, etc., performed by a user by providing an abutting part for preventing an open/close member from turning when the cover is opened on the ejecting member of a cartridge. SOLUTION: The abutting part 22 whose section viewed from a vertical direction is L-shaped is formed on an eject lever 18. When an operating knob is rotated, an open/close lever 4 is rotated, a pawl part 8 is disengaged from a catch 10, and the engagement of the cover 9 is released to turn the cover 9. A projection 9a abutting on the lower end part 21 of the lever 18 moves downward, and the lever 18 moves downward by the pressing force of a spring. The protruding part 20 of the lever 18 abuts on the upper end face of a film cartridge loaded in a cartridge chamber 50, and the cartridge is pushed outside from the main body 1. At this time, the abutting part 22 of the lever 18 abuts on the protruding part 4a provided on the lever 4, so that the lever 4 is prevented from turning.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a mechanism for opening and closing a lid of a cartridge chamber provided in a camera body.

[0002]

2. Description of the Related Art In recent years, a film cartridge (APS film cartridge) has been developed in which a film can be put in and taken out of a cartridge chamber of a camera in a state where the film is entirely stored in the cartridge. In a camera using such a film cartridge, the lid of the cartridge chamber is opened and closed by a mechanism different from that of the conventional camera.

Some of the mechanisms proposed for opening and closing a lid of a cartridge chamber for an APS film cartridge include, for example, Japanese Patent Application Laid-Open Nos.
There is one disclosed in Japanese Patent Application Publication No. -160121. The mechanism proposed in these will be described with reference to an example disclosed in Japanese Patent Application Laid-Open No. 9-160121. As shown in FIG. 8, when the claw portion 103 of the first lever 102 is locked to the locking claw 101 formed on the lid 100,
When the lid 100 is closed and the first lever 102 rotates counterclockwise by a predetermined operation to release the locking, the lid 100 is opened. When the lid 100 is opened, the eject lever 106 also operates to push out the loaded film cartridge. When the lid 100 is opened, the arm 104 of the first lever 102 is locked by a locking portion 105 provided on the camera body.
To prevent the first lever 102 from returning. Further, in response to the rotation of the first lever 102, the light shielding door of the film cartridge is opened and closed via a part 107 of the light shielding door opening and closing mechanism.

[0004]

In the above-described lid opening / closing mechanism, if the locking of the arm 104 with respect to the locking portion 15 is accidentally released, or if the user forcibly releases the first, the first operation is performed. The lever 102 is rotated by the urging force of the spring 108 or the like, and is in the same state as when the lid 100 is closed. In this state, if the lid 100 is to be closed by hand, there is a possibility that the locking claw 101 may hit the claw 103 and be damaged. Also, with the return of the first lever 102, the light shielding door opening / closing mechanism is also driven,
The state corresponds to the open state of the light shielding door of the film cartridge. In this state, if a user tries to load a film cartridge with the light-shielding door closed into the cartridge chamber, it may not be compatible with the light-shielding door opening and closing mechanism, and the members and the film cartridge constituting the light shielding door opening and closing mechanism may be damaged. there were. On the other hand, to solve the above problems,
Adding other mechanisms and the like is not desirable for an APS film compatible camera that requires compactness.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and has a simple structure in which each member related to opening and closing of a lid is not damaged by a user's erroneous operation or the like. An object of the present invention is to provide a lid opening and closing mechanism.

[0006]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, the invention according to claim 1 of the present invention is to open and close a lid of a cartridge chamber provided in a camera body.
An opening / closing member that is rotatably mounted, and an opening / closing mechanism for a lid of a cartridge chamber that includes a discharging member that discharges a film cartridge loaded in the cartridge chamber to the outside when the lid opens. The discharge member is provided with a contact portion that comes into contact with a part of the opening and closing member when the lid is open, and prevents rotation of the opening and closing member.

According to the first aspect of the present invention, when the lid of the cartridge chamber is open, the contact portion of the discharge member contacts a part of the open / close member when the lid of the cartridge chamber is open. Since the rotation is prevented, the opening / closing member cannot be rotated even if the user tries to rotate the opening / closing member by mistake or forcibly.

Here, a part of the opening / closing member contacted by the contact portion of the discharge member may be a projection provided on the opening / closing member so as to be brought into contact with the contact portion. It may be a predetermined shape, structure, or the like originally provided for opening and closing the lid. Further, the opening / closing member may have a portion capable of locking the lid on a part thereof, and may be configured to directly open / close the lid, or may drive the locking member for locking the lid. By doing so, the lid may be opened and closed indirectly.

According to a second aspect of the present invention, in order to open and close a lid of a cartridge chamber provided in a camera body,
An opening / closing member rotatably mounted, a discharging member for discharging the film cartridge loaded in the cartridge chamber when the lid is opened, and a rotating direction in which the opening / closing member opens the lid; Then, the light-shielding door of the film cartridge is closed, and a light-shielding door opening and closing mechanism that opens the light-shielding door of the film cartridge when the opening and closing member rotates in a direction to close the lid, The discharge member is provided with a contact portion that contacts a part of the opening / closing member when the lid is open, and prevents rotation of the opening / closing member.

According to the opening / closing mechanism for the cartridge chamber lid according to the second aspect, when the lid of the cartridge chamber is open, the contact portion of the discharge member comes into contact with a part of the opening / closing member. Since the rotation is prevented, the opening / closing member cannot be rotated even if the user tries to rotate the opening / closing member by mistake or forcibly.

A part of the opening / closing member and the opening / closing member contacted by the contact portion of the discharge member according to the second aspect are substantially the same as those of the first aspect.

According to a third aspect of the present invention, in the opening / closing mechanism of the cartridge chamber lid according to the first or second aspect, a part of the opening / closing member is a projection provided on the opening / closing member. It is characterized by.

According to the third aspect of the present invention, when the lid of the cartridge chamber is open, the contact portion of the discharge member comes into contact with the protrusion provided on the open / close member. Thus, the rotation is prevented, so that even if the user attempts to rotate the opening / closing member by mistake or forcibly, the user cannot rotate the opening / closing member.

[0014]

DESCRIPTION OF THE PREFERRED EMBODIMENTS A mechanism for opening and closing a lid of a cartridge chamber according to the present invention will be described with reference to the drawings. (First Embodiment) FIGS. 1 and 2 show an example of a mechanism for opening and closing a lid of a cartridge chamber according to the present invention. FIG. 1 is a side view showing a state in which the lid is closed, and FIG. FIG. 2 is a partial rear view of the state of FIG. 1. In these figures, reference numeral 1 denotes a camera body, and reference numeral 2 denotes a lid opening / closing mechanism.

A boss 3 is formed on the camera body 1, and an opening / closing lever (opening / closing member) 4 is rotatably fitted to the boss 3. A disk-shaped gear member 5 is provided outside the opening / closing lever 4, and an operation knob (not shown) is integrally fixed to an end surface of the gear member 5. The gear member 5 and the operation knob are fixed by a screw 6 so as to be rotatable together.
Is screwed into the camera body 1 through an opening 24 formed in the opening / closing lever 4. The opening 24
Is formed in a long hole so that the opening / closing lever 4 can rotate about the boss 3 as an axis. An operation knob (not shown) is attached so as to be exposed on the side of the camera body 1 and can be operated from the outside. further,
As shown in FIG. 1, a ratchet portion 7 is provided on the upper portion of the opening / closing lever 4, and the gear member 5 is engaged with the ratchet portion 7. Therefore, the opening / closing lever 4
Is rotated around the boss 3 via the gear member 5 and the ratchet portion 7 by rotating the operation knob. A claw portion 8 is provided below the opening / closing lever 4. The claw portion 8 is detachably locked to a locking claw 10 provided on the lid 9, and is locked to the locking claw 10 with the lid 9 covering the opening of the cartridge chamber 50. By doing so, the lid 9 is fixed so as not to open.

An arm 1 is provided below the opening / closing lever 4.
2 is provided in front of the claw portion 8, while the camera body 1 is provided with a locking portion 13 on the lower inner surface. Arm 1
2 locks the locking portion 13 when the lid 9 is opened to prevent the opening / closing lever 4 from returning, and when closing the lid 9,
The lid 9 is pressed by the locking claw 10 to release the locking to the locking portion 13, and is formed so as to be able to bend with the base end as a fulcrum. On the side of the opening / closing lever 4, a protruding portion 4a that protrudes in a triangular shape is formed.
When the opening / closing lever 4 rotates counterclockwise to open the lid 9, the triangular apex 4b is brought into contact with a contact portion 22 of the eject lever 18 described later. When the opening / closing lever 4 is abutted by the abutting portion 22, it cannot rotate clockwise. In other words, the opening / closing lever 4 is prevented from returning not only by the arm 12 being locked by the locking portion 13 but also by being brought into contact with the contact portion 22.

Further, a first spring 14 is attached to the opening / closing lever 4, and the first spring 14 urges the opening / closing lever 4 in a clockwise direction.

The lid 9 has a substantially rectangular plate shape. As shown in FIG. 2, one side of the lid 9 is rotatably attached to the lower surface of the camera body 1 by a hinge 11 so that the opening of the cartridge chamber 50 can be opened. The part can be opened and closed. Also,
The lid 9 has a lower end 21 of an eject lever 18 described later.
Is provided with a projection 9a.

The opening / closing mechanism 2 for the lid of the cartridge chamber is provided with an eject mechanism for the film cartridge. As shown in FIGS. 1 and 2, an eject lever (discharge member) 18 is attached to the rear surface of the wall forming the cartridge chamber 50 so as to be vertically movable.
The eject lever 18 is a vertically long plate.
Elongated holes 19, 19 are formed at two places in the vertical direction. The cartridge chamber 50 is provided in these slots 19.
The guide levers 51 and 52 provided on the outside of the guide member 51 and 52 are inserted.
Are vertically slid relative to each other in the elongated holes 19, 19 so as to move vertically. Further, the eject lever 18 is urged downward by the second spring 23, and the upper part of the inside of the elongated holes 19, 19 comes into contact with the guide members 51, 52, so that the eject lever 18 is moved by the second spring 23. The biasing force prevents the camera body 1 from deviating.

The upper end of the eject lever 18 protrudes toward the inside of the cartridge chamber 50, and projects downward from the lower surface of the tip of the protruding portion.
Are formed. When the eject lever 18 moves downward, the convex portion 20 comes into contact with and pushes out the upper end surface of the film cartridge loaded in the cartridge chamber 50. Further, when the lid 9 is closed, the eject lever 18
The protrusion 9a of the lid 9 abuts against the lower end portion 21 so that the convex portion 20 does not abut on the upper end surface of the film cartridge against the urging force of the second spring 23, as shown in FIG. . The eject lever 18 is provided with a contact portion 22 having an L-shaped cross section when viewed from above and below, from the side to the side surface of the camera body 1. The abutting portion 22 rotates the opening / closing lever 4 in a counterclockwise direction to open the lid 9, thereby causing the eject lever 18 to rotate.
Moves downward and comes into contact with the apex 4b of the protrusion 4a of the opening / closing lever 4, as shown in FIG. When closing the lid 9, the arm 12
Before the projection 9a is pressed by the back of the locking claw 10.
Abuts on the lower end 21.

An opening / closing lever 4 is provided in the camera body 1.
The light-shielding door opening / closing mechanism 17 that opens and closes the light-shielding door 61 of the film cartridge 60 loaded in the cartridge chamber 50 by the rotation of is provided. This light shielding door opening / closing mechanism 17
As shown in FIG. 3, the light shielding door opening / closing driving member 15 is provided between the light shielding door opening / closing driving member 15 and the opening / closing lever 4. And an intermediate lever 16 to be driven. The light-shielding door opening / closing drive member 15 is provided coaxially with the gear portion 15 a rotatably provided around the axis, and is engaged with the upper end of an opening / closing shaft 62 for opening and closing the light-shielding door 61. And an engaging portion 15b. The intermediate lever 16 is formed on a part of the outer periphery of a disk that is rotatable around an axis parallel to and spaced from the axis of the gear portion 15a, and the gear portion 16a meshes with the gear portion 15a; It comprises an engaging portion 16b formed at a position facing the gear portion 16a on the outer periphery of the disk. This engaging part 1
Reference numeral 6b protrudes toward the opening / closing lever 4 and is inserted into and engaged with a hole 4c formed at the upper end of the opening / closing lever 4. In the light shielding door opening / closing mechanism 17 having the above configuration, when the opening / closing lever 4 rotates counterclockwise, the intermediate lever 16 rotates clockwise, and the light shielding door opening / closing driving member 15
1 rotates in the closing direction. When the opening / closing lever 4 rotates clockwise, the intermediate lever 16 rotates counterclockwise, and the light shielding door opening / closing drive member 15 rotates in a direction to open the light shielding door 61.

The operation of the opening / closing mechanism for the lid of the cartridge chamber having the above configuration will be described. When the lid 9 shown in FIGS. 1 and 2 is closed, the claw 8 of the opening / closing lever 4 is engaged with the locking claw 10 of the lid 9. In the cartridge chamber 50,
A film cartridge 60 is loaded. In this state, when the user rotates the operation knob (not shown) in the counterclockwise direction, the opening / closing lever 4 also resists the urging force of the first spring 14 via the gear member 5 and the ratchet portion 7. , Rotate counterclockwise. On the other hand, when the opening / closing lever 4 rotates counterclockwise, the light shielding door opening / closing mechanism 1 is rotated.
The intermediate lever 16 rotates clockwise through the engaging portion 16b, and the light shielding door 61 of the film cartridge 60 is closed by the light shielding door opening / closing drive member 15. Then, the rotation of the opening / closing lever 4 causes the claw portion 8 to engage with the locking claw 10.
Is released, the locking of the lid 9 is released, and the lid 9 is opened.

When the lock of the lid 9 is released and the lid 9 is rotated about the hinge 11 as a fulcrum, the projection 9a, which is in contact with the lower end 21 of the eject lever 18, also moves in an arc downward. . As a result, the eject lever 18 moves downward by the urging force of the second spring 23. At this time, the projection 20 of the eject lever 18 comes into contact with the upper end surface of the film cartridge 60, and the eject lever 18
As the camera moves downward, the film cartridge 60 is pushed out of the camera body 1. The eject lever 18 stops moving downward when the upper peripheral surface of the long holes 19 abuts on at least one of the guide members 51 52. As a result, the state shown in FIGS. 4 and 5 is reached, and the contact portion 22 of the eject lever 18 contacts the vertex 4b of the protrusion 4a of the opening / closing lever 4. At this time, the arm 12 of the opening / closing lever 4
Is locked to a locking portion 13 provided on the camera body 1 so that the opening / closing lever 4 does not rotate to return to the original position.

When closing the lid 9 from the open state, the lid 9 is rotated in the closing direction about the hinge 11 as a fulcrum. The projection 9 a is located at the lower end 21 of the eject lever 18.
When the lid 9 is further rotated in the state of contact with the ejector 4, the eject lever 18 moves upward, and at the same time, the contact portion 22 is retracted from the position where it comes into contact with the protrusion 4 a. When the lid 9 is further pressed, the arm 12 of the opening / closing lever 4 is moved.
Is pressed on the back of the locking claw 10 to bend, and the locking portion 13
, The opening / closing lever 4 is rotated clockwise by the urging force of the first spring 14, the claw portion 8 of the opening / closing lever 4 is locked to the locking claw 10 of the lid 9, and the lid 9 is locked in the closed state. Is done. If an unused film cartridge is loaded, the opening / closing lever 4 rotates clockwise, so that the intermediate lever 16 of the light shielding door opening / closing mechanism 17 rotates counterclockwise via the engaging portion 16b, The light shielding door opening / closing mechanism driving member 15 opens the light shielding door of the film cartridge.

According to the opening / closing mechanism 2 for the lid of the cartridge chamber, the rotation of the eject lever 18 is prevented by the abutting portion 22 of the eject lever 18 abutting on the protruding portion 4a provided on the opening / closing lever 4. Therefore, if the user accidentally or forcibly removes the arm 12 from the locking portion 13, the user can open and close the arm 12 by using the urging force of the first spring 14 or by operating the operation knob clockwise. The lever 4 cannot be turned. That is, when the lid 9 is open, only the opening / closing lever 4 does not return to the same state as when the lid 9 is closed, and the light shielding door opening / closing mechanism 17 also operates in the direction to open the light shielding door 61. I will not do it.

Therefore, even though the lid 9 is open, the opening / closing lever 4 returns to its original position. Forcibly closing the lid 9 in this state may damage the lid 9 or the opening / closing lever 4, etc. The door opening / closing mechanism 17 corresponds to the open state of the light shielding door 61, and by mounting a film cartridge in which the light shielding door 61 is closed, the members constituting the light shielding door opening / closing mechanism 17 and the film cartridge opening / closing shaft 6 are mounted.
2 can be prevented from being damaged. Also,
Each of the above-mentioned members is provided in a simple structure by using the projecting portion 4a and the contact portion 22 formed on the opening / closing lever 4 and the eject lever 18 constituting the lid opening / closing mechanism 2 without increasing the number of components. Etc. can be prevented.

(Second Embodiment) FIG. 6 shows another example of the opening / closing mechanism of the lid of the cartridge chamber of the present invention, and is a side view showing a state where the lid is open. Reference numeral 30 denotes a camera body, and 46 denotes a lid opening / closing mechanism. The operation of the lid opening / closing mechanism 31 in FIG. 6 is the same as that of the first embodiment with respect to the lid opening / closing portion, but in the first embodiment, the opening / closing lever 4 which is rotated by the operation knob directly connects the lid 9. Although it was configured to lock, in the second embodiment,
A member that is rotated by the operation knob and a member that locks the lid are different, and the operation of the operation knob is indirectly transmitted to the lid. Hereinafter, this point will be mainly described.

A mechanism 46 for opening and closing the lid of the cartridge chamber shown in FIG.
Is mainly composed of an opening / closing lever (opening / closing member) 33, a locker 31, and an eject lever (ejection member) 42. The screw 34 penetrating the opening / closing lever 33 is attached to the camera body 30 so as to be rotatable together with the opening / closing lever 33 by an operation knob (not shown). The lower end 33b of the opening / closing lever 33 is formed in a substantially circular shape, while the lower end 3b is provided above the locker 31.
A fitting portion 31a to which 3b can be fitted is formed. The lower end 33b of the locker 31 and the opening / closing lever 33
The camera is attached to the camera body in a state where the camera is inserted into the camera body 1a. When either of them rotates, the other rotates in the opposite direction. A protruding portion 33c protrudes from the side of the opening / closing lever 33, and when the opening / closing lever 33 is rotated clockwise to open the lid 39, the vertex 3
3d is brought into contact with the contact portion 43 of the eject lever 42 which has moved downward. And
When the opening / closing lever 33 is contacted by the contact portion 43,
It cannot rotate counterclockwise, and as a result,
1 cannot be rotated, that is, the locker 31 is prevented from returning not only by the arm 37 being locked by the locking portion 38 but also by the opening / closing lever 33 being brought into contact with the contact portion 43. Will be.

The locker 31 is rotatable about a boss 32 and is urged clockwise by a first spring 41. A claw portion 36 is formed at the lower portion of the locker 31, while a locking claw 40 is provided on the lid 39, and the lid 39 is formed by locking the locking claw 40 with the claw portion 36. Become closed. Further, an arm 37 is formed in front of the claw portion 36 below the locker 31, while a locking portion 38 is provided on the camera body 30,
When the lid 39 is opened, the arm 37 is locked to the locking portion 38 to prevent the locker 31 from returning.
When the cover 9 is closed, the cover 39 is pressed by the locking claw 40 to release the locking to the locking portion 38.

The eject lever 42 constituting the eject mechanism of the film cartridge of this camera is almost the same as the eject lever 18 in FIG. 1, but instead of the convex portion 20 projecting downward from the upper portion of the eject lever 18, A projection 44 projecting from the side of the camera body 30 is formed in the cartridge chamber 50 (FIG. 7). On the side surface of the cartridge chamber 45, there is provided a groove portion 45a in which the convex portion 44 can freely move up and down. When the eject lever 42 moves downward, the eject lever 42 comes into contact with the upper end surface of the film cartridge loaded in the cartridge chamber 45 and pushes it out.

The upper end 33a of the opening / closing lever 33 is
It is designed to engage with a part of the intermediate lever 35 constituting the light shielding door opening / closing mechanism. In this light shielding door opening / closing mechanism, when the opening / closing lever 33 rotates clockwise, the light shielding door of the film cartridge is closed via the intermediate lever 35, and when the opening / closing lever 33 rotates counterclockwise,
The light blocking door is opened.

The operation of the cartridge chamber lid opening / closing mechanism 46 having the above configuration will be described. When a film cartridge is loaded in the cartridge chamber 45 and the user rotates an operation knob (not shown) clockwise from a state in which the lid 39 is closed, the opening / closing lever 33 also rotates clockwise. When the opening / closing lever 33 rotates clockwise, the light shielding door of the film cartridge 60 is closed via the intermediate lever 35 of the light shielding door opening / closing mechanism. Then, the rotation of the opening / closing lever 33 rotates the locker 31 in the counterclockwise direction, whereby the claw portion 36 is disengaged from the locking claw 40 and the locking of the lid 39 is released.
Is released.

When the locking of the lid 39 is released and the lid 39 is rotated about a hinge (not shown) as a fulcrum, the projection 39a, which has been in contact with the lower end 42a of the eject lever 42, also moves in an arc downward. Then, the eject lever 42 moves downward. As a result, the protrusion 3 of the opening / closing lever 33
The contact portion 43 of the eject lever 42 contacts the apex portion 33d of 3c, resulting in the state of FIG. At this time, the projection 44 of the eject lever 42 comes into contact with the upper end surface of the film cartridge, and the film cartridge is pushed out of the camera body 30.

When closing the cover 39 from the open state, the cover 39 is rotated in the closing direction. With the projection 39a abutting on the lower end 42a of the eject lever 42,
The eject lever 42 moves upward, and with it,
The contact portion 43 also retracts from a position where it comes into contact with the apex portion 33d of the protruding portion 33c. Then, when the lid 39 is further pressed, the arm 37 of the locker 31 is pressed by the back of the locking claw 40 and bends, disengages from the locking portion 38, and the locker 31 is turned clockwise by the urging force of the first spring 41. Rotate, key 3
The first claw portion 36 is locked to the locking claw 40 of the lid 39, and the
Is closed. With the rotation of this key 31,
The opening / closing lever 33 rotates counterclockwise, and if a film cartridge is loaded, the light-shielding door of the film cartridge is opened via the intermediate lever 35 of the light-shielding door opening / closing mechanism.

The mechanism 46 for opening and closing the lid of the cartridge chamber described above.
According to the above, the contact portion 43 of the eject lever 42 comes into contact with the protruding portion 33c provided on the opening / closing lever 33 to prevent the rotation thereof. When the lever 37 is removed from the locking part 38, the opening / closing lever 33 cannot be rotated by the urging force of the first spring 41 or by operating the operation knob clockwise. As a result, The locker 31 cannot be rotated. That is, when the lid 39 is open, the opening / closing lever 33 and the locker 31 do not return to the same state as when the lid 39 is closed, and the light shielding door opening / closing mechanism operates in the direction to open the light shielding door. I will not do it.

Therefore, although the cover 39 is open, the opening / closing lever 33 and the locker 31 return to the original state. In this state, the cover 3 is forcibly closed.
9 and the locker 31 are damaged, the light-shielding door opening / closing mechanism corresponds to the open state of the light-shielding door, and a member constituting the light-shielding door opening / closing mechanism is mounted by loading a film cartridge with the light-shielding door closed. It is possible to prevent the opening / closing axis of the film cartridge from being damaged. Further, by utilizing the protruding portion 33c and the contact portion 43 formed on the opening / closing lever 33 and the eject lever 42 constituting the lid opening / closing mechanism 46, without increasing the number of components,
The above members can be prevented from being damaged with a simple structure.

[0037]

According to the first aspect of the present invention, the lid cannot be opened even if the user attempts to rotate the opening / closing member by mistake or forcibly. Only the opening / closing member does not return to the same state as when the lid is closed. Therefore, it is possible to prevent the lid and the opening / closing member from being damaged due to the fact that the lid returns to the original state even though the lid is open and the lid is forcibly closed. Further, since the opening / closing member and the discharging member constituting the opening / closing mechanism of the lid of the cartridge chamber are used, it is possible to prevent the damage of each member with a simple structure without adding a new member.

According to the second aspect of the present invention, the lid cannot be opened even if the user attempts to rotate the opening / closing member by mistake or forcibly. Sometimes, only the opening / closing member does not return to the same state as when the lid is closed. Therefore, even though the lid is open, the opening / closing member returns to its original position, and the lid and the opening / closing member are damaged by forcibly closing the lid or the light shielding door corresponding to the open state of the light shielding door. By mounting the film cartridge with the light shielding door closed in the opening and closing mechanism, it is possible to prevent the members constituting the light shielding door opening and closing mechanism and the opening and closing shaft of the film cartridge from being damaged. Further, since the opening / closing member and the discharging member constituting the opening / closing mechanism of the lid of the cartridge chamber are used, it is possible to prevent the damage of each member with a simple structure without adding a new member.

According to the invention described in claim 3, according to claim 1
Alternatively, in the invention described in Item 2, the lid, the opening / closing member, and the like can be prevented from being damaged with a simple structure using the projecting portion of the opening / closing member and the contact portion of the discharging member.

[Brief description of the drawings]

FIG. 1 is a side view showing an example of a mechanism for opening and closing a lid of a cartridge chamber according to the present invention, showing a state in which the lid is closed.

FIG. 2 is a partial rear view of a mechanism for opening and closing a lid of the cartridge chamber in FIG. 1;

FIG. 3 is a perspective view showing a light-shielding door opening / closing mechanism provided in the opening / closing mechanism of the lid of the cartridge chamber in FIG. 1;

FIG. 4 is a side view showing a state in which a lid of an opening / closing mechanism of a lid of the cartridge chamber in FIG. 1 is opened.

5 is a partial rear view of an opening / closing mechanism of a lid of the cartridge chamber in FIG. 4;

FIG. 6 is a side view showing another example of the opening / closing mechanism of the lid of the cartridge chamber of the present invention.

FIG. 7 is a perspective view showing a part of the eject lever of FIG. 6;

FIG. 8 is a side view showing a conventional mechanism for opening and closing a lid of a cartridge chamber.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Camera main body 2 Opening / closing mechanism of the lid of a cartridge chamber 4 Opening / closing lever (opening / closing member) 4a Projection part 9 Lid 15 Light shielding door opening / closing drive member 17 Light shielding door opening / closing mechanism 18 Eject lever (discharge member) 22 Contact part 50 Cartridge chamber 60 Film Cartridge 61 Light shielding door 30 Camera body 31 Locker 33 Opening / closing lever (opening / closing member) 33c Projecting portion 39 Lid 42 Eject lever (discharging member) 43 Contact portion 45 Cartridge chamber 46 Opening / closing mechanism of cartridge chamber lid

Claims (3)

[Claims] An opening / closing member rotatably mounted to open and close a lid of a cartridge chamber provided in a camera body, and is mounted in the cartridge chamber when the lid is opened. An opening / closing mechanism for a lid of a cartridge chamber having a discharging member for discharging a film cartridge to the outside, wherein the discharging member abuts a part of the opening / closing member when the lid is open, An opening and closing mechanism for a lid of a cartridge chamber, wherein a contact portion for preventing rotation of the opening and closing member is provided. 2. An opening / closing member rotatably mounted for opening and closing a lid of a cartridge chamber provided in a camera body, and being loaded into the cartridge chamber when the lid is opened. A discharge member for discharging the film cartridge to the outside, a light-shielding door of the film cartridge is closed when the opening / closing member rotates in a direction to open the lid, and a light-shielding door of the film cartridge is closed when the opening / closing member rotates in a direction to close the lid. A light-shielding door opening and closing mechanism for opening the light-shielding door, wherein the ejection member contacts the part of the opening and closing member when the lid is open, and An opening and closing mechanism for a lid of a cartridge chamber, wherein a contact portion for preventing rotation of a member is provided. 3. The opening / closing member according to claim 1, wherein a part of the opening / closing member is a protrusion provided on the opening / closing member.
Or the mechanism for opening and closing the lid of the cartridge chamber according to 2.