JPH10171009A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a camera constituted so that a cartridge cover is locked in a closed state until the rewinding of a film is finished after a film cartridge is loaded inside a camera main body from the cartridge cover. SOLUTION: A lock mechanism 20 locking a retaining member 31 retaining the cartridge cover 12 in a closed state during the time when a motor for feeding a film 22 is actuated, is arranged in the camera main body 3. Besides, a holding mechanism 32 holding the locking member 31 in a locked state until the film is rewound after it is fed out from the film cartridge even when the motor 22 is stopped being energized is arranged. Thus, the cover 12 can be locked in the closed state.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera capable of locking a cartridge lid in a closed state between a time when a film cartridge is loaded from a cartridge lid into a camera body and a time when a film is rewound. .

[0002]

2. Description of the Related Art Recently, various functions have been added.
In film cartridges for advanced photographic systems, which are expected to spread, unlike conventional film cartridges, when film is loaded into a camera, the film is completely contained in the film cartridge without the end of the film being pulled out. In this state, the film can be loaded into the camera simply by inserting the film cartridge into the camera.

In a camera using such a film cartridge, since the film is completely contained in the film cartridge and is compact, the rear lid of the camera is opened widely and the film cartridge is loaded as in the prior art. Instead, a relatively small cartridge lid provided on the lower surface side of the camera body is opened and the cartridge is loaded in the axial direction.

In the camera, after the film cartridge is loaded into the camera body, the take-up spool in the film cartridge rotates in the rewinding direction by the rotation of the feeding motor. The film sensitivity and the number of sheets are read by a bar code provided at the end of the cartridge (bar code reading step). Then, when the feeding motor rotates, the take-up spool rotates in the unwinding direction and the film cartridge is rotated. The film is set in a state in which the film can be photographed by winding the leading end of the film around a winding spool provided in the camera body (feeding step).

[0005] Next, after taking a picture, the take-up spool is rotated by the rotation of the feeding motor, and the film is taken up by one frame (the take-up step). Then, before the film cartridge is taken out of the camera body, the feeding motor is rotated, and the film is wound on the winding spool (rewinding step). When the take-up spool rotates and stops at a predetermined phase, a display corresponding to each of “unexposed”, “partially exposed”, “exposed”, and “developed” is performed on the film cartridge ( Film state display step).

[0006]

By the way, in a camera using a film cartridge of the above-mentioned advanced photographic system, as in a conventional camera, "the malt stuck around the acrylic window is moved in the direction of closing the rear lid. Pressing against the patrone (film cartridge) with the force of this to block the light that penetrates through the acrylic window by pressing it tightly, it is not possible to provide a window and check for the presence of the film cartridge. It is.
Therefore, the "barcode reading step", "delivery step", "winding step", "rewinding step",
In each step of the "film state display step", the cartridge lid was opened and the film was exposed, and the film was sometimes wasted.

[0007] The present invention has been made in view of the above circumstances, and in each of the "bar code reading step", "sending out step", "winding step", "rewinding step", and "film state displaying step". It is an object of the present invention to provide a camera capable of locking a cartridge lid in a closed state.

[0008]

According to a first aspect of the present invention, there is provided a camera in which a film cartridge accommodating a film is loaded into a camera body from a cartridge lid provided on the camera body. A camera that is provided with a lock mechanism for locking a locking member that locks the cartridge cover in a closed state during operation of the film feeding motor in the camera body. is there.

The operation of the feeding motor means that the feeding motor is rotating in the "delivery step" while the feeding motor is rotating in the "bar code reading step". In the “winding-up step”, while the feeding motor is rotating, in the “rewinding step”, while the feeding motor is rotating, in the “film state displaying step”, the take-up spool Means that the feed motor is rotating when stopping at a predetermined phase by rotating.

In the camera according to the first aspect, when a film cartridge is loaded into the camera body and the cartridge lid is closed, the locking mechanism is locked by the lock mechanism while the feeding motor is operating (rotating). Since the members are locked, the “barcode reading process”, “delivery process”,
In each of the “winding step”, “rewinding step”, and “film state display step”, the cartridge lid is locked in the closed state by the locking member, and therefore the cartridge lid does not open excessively.

The camera according to claim 2 is the camera according to claim 1,
An engagement lever that is releasably engageable with the locking member; and a locking mechanism that drives the engagement lever to engage the locking member when power is supplied to the feeding motor. And a drive mechanism for driving the engagement lever in a direction to disengage from the locking member when power supply to the feeding motor is stopped.

The drive mechanism includes, for example, a plunger that is turned on by energizing a feeding motor to drive the engagement lever toward the locking member, and a plunger that releases the engagement lever from the locking member. And a biasing member for moving the engagement lever in a direction in which the engagement lever is disengaged from the locking member when the power supply to the feed motor is stopped and the driving of the plunger is turned off.

In the camera according to the second aspect, when a film cartridge is loaded in the camera body and the cartridge lid is closed, the engagement of the lock mechanism is performed while the feeding motor is operating (rotating). Since the lever is moved to the locking member side by the driving mechanism and engages with the locking member, and the locking member is locked, the “barcode reading step”, “delivery step”, “winding step”, In each step of the "rewinding step" and the "film state displaying step", the cartridge lid is locked in a closed state by the locking member, so that the cartridge lid does not open unnecessarily.

On the other hand, when the power supply to the feeding motor is stopped when the film is completely rewound, the engaging lever is moved in a direction away from the locking member by the drive mechanism, and the locking member is moved. And the lock of the locking member is released, and the cartridge lid can be opened.

According to a third aspect of the present invention, in the second aspect,
A holding mechanism that holds the engagement lever in the engaged state with the locking member even when the power supply to the feeding motor is stopped during a period from when the film is fed out of the film cartridge to when the film is rewound. Is provided.

In the case where the power supply to the feeding motor is stopped between the time when the film is fed from the film cartridge and the time when the film is rewound, for example,
After the film is set in a state in which the film can be photographed and before the photographing, the photographing is performed, and then, the winding spool is rotated to wind up the film by one frame and the next photographing.

In the camera according to the third aspect, each of the steps of "bar code reading step", "sending step", "winding step", "rewinding step", and "film state displaying step", During the operation of the motor, the locking mechanism locks the locking member so that the cartridge lid does not open, and the power supply to the feeding motor is stopped between the respective steps. Also, since the engaging lever is held in a state of being engaged with the locking member by the holding mechanism, the cartridge lid is locked in a closed state by the locking member, and thus the cartridge lid is opened excessively. Nothing.

[0018]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of a camera according to the present invention will be described below with reference to the drawings. In the camera of the present invention, a lock mechanism for locking a locking member that locks the cartridge lid in a closed state is provided in the camera body during operation of the film feeding motor. Before describing the lock mechanism, a mechanism for opening and closing the cartridge lid will be described. 1 and 2 show an example of the camera of the present invention. FIG. 1 is a side view of the inside of the camera showing a state in which a cartridge lid is closed, and FIG. 2 is a camera showing a state in which the cartridge lid is open. It is a side view of an inside.

As shown in FIGS. 1 and 2, a boss 4 is formed on the camera body 3, and a key 5 is rotatably fitted to the boss 4. A disc-shaped key gear 6 is provided on the upper side of the keyita 5.
A key knob (not shown) is integrally attached to an end surface of the key gear 6 from the side of the camera body. The key gear 6 and the key knob are rotatably fixed to each other by a screw 8, and the screw 8 is screwed into the camera body 3 through an opening 9 formed in the lock 5. The opening 9 is formed in a long hole so that the locker 5 can rotate about the boss 4 as an axis.

Further, a ratchet portion 10 is provided on the upper portion of the locker 5, and the ratchet portion 10 is provided.
Is engaged with the key gear 6. Therefore, the locker 5 rotates about the boss 4 via the lock gear 6 and the ratchet portion 10 by rotating the lock knob. Further, a claw portion 11 is provided below the locker 5. This claw part 1
Reference numeral 1 designates a detachably engaging lock claw 13 provided on the cartridge lid 12. By locking the lock claw 13, the cartridge lid 12 is fixed so as not to be opened. I have.

An arm 14 is provided below the hook 5 in front of the claw portion 11, while the camera body 3 is provided with an engaging portion 15 on its lower inner surface.
The arm 14 locks the locking portion 15 when the cartridge lid 12 is opened to prevent the return of the locker 5, and when closing the cartridge lid 12,
The cover 12 is pressed by the lid 12 to release the engagement with the engagement portion 15, and is formed to be able to bend with the base end as a fulcrum.

Further, a lower end of a key spring 16 is engaged with a lower portion of the key iter 5, and an upper end of the key spring 16 is engaged with a pin provided on a wall of the camera body 3. The key spring 16 urges the key 5 in a direction in which the claw 11 provided on the key 5 engages with the locking claw 13 provided on the cartridge lid 12. In FIGS. Are urged clockwise about the boss 4.

In the cartridge lid opening / closing mechanism having the above structure, when the cartridge lid 12 is opened,
When the lock 5 is rotated counterclockwise against the urging force of the lock spring 16 by operating the lock knob, the claw 11 formed on the lower portion of the lock 5 is disengaged from the locking claw 13 of the cartridge lid 12. Thereby, the cartridge lid 12 can be opened. In addition, cartridge lid 1
When the lock 2 is released, the arm 14 of the locker 5 is
By locking the locker 5, the locker 5 can be locked so as not to return to its original position.

Next, the lock mechanism of the camera according to the present invention will be described. That is, the lock mechanism 20
The locking member 31 locks the cartridge lid 12 in a closed state during the operation of the film feeding motor.
This is the mechanism that locks. The lock mechanism 20 is provided with an engagement lever 21 that is detachably engageable with the locking member 31.
When the feeding motor 22 is energized, the engaging lever 21 is driven in a direction to engage with the locking member 31, and when the feeding motor 22 is turned off, And a drive mechanism 23 for driving the joint lever 21 in a direction in which the joint lever 21 is detached from the locking member 31.

The locking member 31 is composed of the key gear 5, the key gear 6, the key spring 16 and the like, and the engaging lever 21 is engaged with the key gear 6 of the locking member 31 so as to be detachable. It has become. That is, first, the engagement lever 21 is provided on a pressure plate provided on the camera body 3 so as to be able to reciprocate left and right in FIG. That is, the engagement lever 21 has a pair of long holes 21a,
21a is formed, and the engagement lever 21 can reciprocate left and right by being screwed into the pressure plate through screws 24, 24 in these long holes 21a, 21a.
On the other hand, as shown in FIGS. 1 and 2, an extension 6 a extending radially outward is formed on the outer periphery of the key gear 6, and the engagement lever 21 is provided on the extension 6 a. Move rightward and engage, and the engagement lever 21 moves leftward and comes off.

The driving mechanism 23 is configured as follows. That is, first, the plunger device 25 is provided below the engagement lever 21. The plunger device 25 includes a rod-shaped plunger 26,
The coil unit 27 is configured to move the plunger 26. When the coil unit 27 is energized, the plunger 26 moves to the right. The feed motor 22 rotates a take-up spool in the film cartridge and a take-up spool provided in the camera body. Switching of the rotation direction of the feed motor 22 is controlled by the control unit 28. It is controlled. A CPU 29 is connected to the control unit 28. When a control signal is input from the CPU 29 to the control unit 28, switching control of the rotation direction of the feed motor 22 is performed, and Motor 22
Is turned on / off. Although the feeding motor 22, the control unit 28, and the CPU are shown outside the camera body 3 for convenience of illustration, they are actually built in the camera body 3.

Further, in the control section 28, when power is supplied to the feeding motor 22, power is supplied to the coil section 27, and when power supply to the feeding motor 22 is stopped, power is supplied to the coil section 27. Is controlled so that the energization of the coil section 27 is stopped. And this coil part 2
7 is energized, the plunger 26 moves to the right. The left end of the plunger 26,
The left end of the engagement lever 21 is connected to a connection member 26a, so that the engagement lever 21 moves together with the plunger 26.

A projection 21b is formed at the center of the upper end of the engagement lever 21, and one end of a spring (biasing member) 21c is locked to the projection 21b.
The other end of 1c is locked on the camera body 3 side. The engagement lever 21 is urged leftward by a spring 21c. Accordingly, when the coil portion 27 is energized, the plunger 26 moves rightward, whereby the engaging lever 21 moves rightward against the urging force of the spring 21c to engage with the key gear 6, and , Coil part 2
When the energization to 7 is stopped, the urging force of the spring 21c causes
The engagement lever 21 moves to the left to disengage from the key gear 6.

In the camera body 3, even if the power supply to the feeding motor 22 is stopped between the time when the film is fed from the film cartridge and the time when the film is rewound, the engagement lever 21 is held. A holding mechanism 32 for holding the locking member 31 in a state of being engaged with the key gear 6 is provided. That is, first, on the left side of the engagement lever 21, the contact lever 30 is provided so as to be able to reciprocate left and right. That is, the contact lever 30 has a pair of long holes 3.
0a, 30a are formed, and these long holes 30a, 3a are formed.
The contact lever 30 can reciprocate right and left by screwing the screw into the pressure plate through the screws 33, 33 at 0a.

A spring 35 is mounted on the pressure plate, and one end of the spring 35 is connected to the contact lever 30.
, Whereby the contact lever 30 is urged toward the engagement lever 21 side. The biasing force of the spring 35 is set to be larger than the biasing force of the spring 21c. Further, an intermediate lever 36 is provided on the pressure plate.
Is mounted so as to be rotatable about its central portion, and the upper end of the intermediate lever 36 is connected to the contact lever 30.
At the left end. Therefore, the intermediate lever 3
When the lever 6 rotates clockwise, the contact lever 30 is moved rightward by the urging force of the spring 35.

Further, the intermediate lever 36 is provided on the pressure plate.
The drive lever 37 is rotatably mounted on the central portion as a fulcrum. The right end of the drive lever 37 is rotatably connected to the lower end of the intermediate lever 36. Therefore, when the drive lever 37 rotates counterclockwise, the intermediate lever 36 rotates clockwise, whereby the contact lever 30 moves rightward by the urging force of the spring 35. .

At the left end of the drive lever 37, a lower end of a spring 38, which is set to have a larger biasing force than the spring 35, is engaged. The upper end of the spring 38 is engaged with the pressure plate while being pulled. Has been stopped. Therefore, the drive lever 37 is urged clockwise by the spring 38, whereby the contact lever 30 is moved by the spring 3.
5 is urged to the left via the intermediate lever 36 against the urging force of No. 5.

Further, at the left end of the drive lever 37,
A roller 40 is rotatably mounted, and the lower edge of the film F unwound from the film cartridge comes into contact with and separates from the roller 40. That is, when the cartridge lid 12 is opened as shown in FIG. 3, the upper portion of the outer periphery of the roller 40 is positioned above the lower edge of the film F to be unwound (see FIG. 5). When the film F is unwound in this state, as shown in FIG. 5, the inclined portion F1 at the lower end of the film F comes into contact with the roller 40 and pushes the roller 40 downward. The edge abuts the roller 40 to hold it down, while the lower edge of the film F comes off the roller 40 when the film F is wound up. I have. 3 to 5, reference numeral 41 denotes a photo interrupter, and the perforations 42 provided on the film F by the photo interrupter 41.
Is detected, whereby the movement of the film F is detected.

Next, the lock mechanism 20 of the camera having the above-described structure will be described.
The operation of the holding mechanism 32 will be described. First, before the film cartridge is loaded, the state is as shown in FIG. When the film cartridge is loaded into the camera body 3 and the cartridge cover 12 is closed, the claw 11 of the locker 5 engages with the locking claw 13 of the cartridge cover 12 as shown in FIG. The lid 12 is attached. On the other hand, when the cartridge lid 12 is closed, the feeding motor 22 is energized to rotate the take-up spool in the film cartridge in the rewinding direction, and the bar code provided at the end of the take-up spool Read the film sensitivity and number of sheets (bar code reading process). In the barcode reading step, the coil motor 27 is also energized because the motor 22 is energized.

Then, as shown in FIG.
6 moves rightward, and the engagement lever 21 moves rightward against the urging force of the spring 21c to engage with the key gear 6.
As a result, the locking member 31 composed of the key gear 6, the key 5 and the like is locked, and the cartridge lid 12 is locked in a closed state.

Next, when the feeding motor 22 rotates, the take-up spool is rotated in the unwinding direction to feed out the film from the film cartridge, and the leading end of the film is wound on the take-up spool provided in the camera body. The film is set in a photographable state by attaching (feeding step). On the other hand, when the film F is sent out from the film cartridge, as shown in FIG. The film F is pressed downward, and the lower edge of the film F comes into contact with the roller 40, thereby holding the film F pressed downward.

When the roller 40 is pushed down, the drive lever 37 rotates counterclockwise, thereby rotating the intermediate lever 36 clockwise. Then, the contact lever 30 is moved rightward by the urging force of the spring 35, and the right end of the contact lever 30 contacts the engagement lever 21 to hold the engagement lever 21 in the engaged state with the key gear 6. I do. Therefore, the cartridge lid 12 is locked in a closed state even after the power supply to the feeding motor 22 is stopped between the time when the film is set in a photographable state and before the photographing.

Next, after photographing, the feed motor 22 is energized, and the winding spool rotates to wind up the film by one frame (winding step). While the power supply to the feed motor 22 is stopped, the abutment lever 30 is also operated by the engagement lever 2 during this time.
1, the cartridge lid 12 is locked in a closed state. In the winding process, the plunger 26 also operates because the feeding motor 22 is energized. Therefore, the engagement lever 21 is formed by the plunger 26 and the contact lever 30.
Are held in a state of engagement with the key gear 6, and the cartridge lid 12 is locked in a closed state.

Then, the photographing and winding steps are sequentially repeated a desired number of times to photograph a desired number of frames. Thereafter, before taking out the film cartridge from the camera body, the feed motor 22 is rotated. ,
While the film is being wound on the take-up spool (rewinding step), the feed motor 22 is energized, so that the plunger 26 is also operated, so that the plunger 26 and the contact lever 30 are used. The engaging lever 21 is held in a state of being engaged with the key gear 6, and the cartridge lid 12 is locked in a closed state.

Next, when the rewinding is completed, the lower edge of the film F comes off the roller 40 of the drive lever 37. Then, the drive lever 37 is rotated clockwise by the urging force of the spring 38, whereby the intermediate lever 36 is rotated.
Rotates counterclockwise, the contact lever 30 is pushed to the left and moves, and the contact lever 30 moves away from the engagement lever 21. At this time, since the feed motor 22 is energized, the engagement lever is held in a state of being engaged with the key gear 6 by the plunger 26, and the cartridge lid 12 is locked in a closed state.

Further, by the feeding motor 22,
By rotating the take-up spool and stopping at the determined phase, the film cartridge can be
After the display corresponding to each of "partial exposure", "exposed", and "developed" is performed (film state display step), when the power supply to the feeding motor 22 is stopped, the engagement lever 21 is released. The cartridge 21 is moved leftward by the urging force of the spring 21c, is released from the key gear 6, is unlocked, and the cartridge lid 12 is openable.

As described above, in the camera of this embodiment, each of the steps of "bar code reading step", "sending step", "winding step", "rewinding step", and "film state displaying step", While the motor 22 is operating, the plunger 26 is operated and the engagement lever 2 is turned on.
By engaging the lock lever 1 with the key gear 6, the cartridge lid is locked in a closed state, and the contact lever 30 is engaged even if the power supply to the feeding motor 22 is stopped between the respective steps. Since the engaging lever 21 is kept in a state of being engaged with the key gear 6 by abutting on the lever 21, the cartridge lid is locked in a closed state. Therefore, the cartridge lid is not opened unnecessarily in each of the above-mentioned steps and between these steps, so that it is possible to prevent erroneous reading of the barcode and erroneous exposure of the film, and to correctly display the state of the film. it can.

In the above example, the lock mechanism 20 is
The lock mechanism according to the present invention is not limited to this, but includes the engagement lever 21, the spring 21c, the plunger device 25, and the like.
The number, arrangement position and the like may be appropriately set and configured. Further, instead of the plunger device 25, an electric cylinder device or a linear motor device may be used. In short, the locking member 31 that locks the cartridge lid in a closed state may be locked while the film feeding motor 22 is operating.

In the above example, the holding mechanism 32 is constituted by the contact lever 30, the intermediate lever 36, the driving lever 37, the spring 35, the spring 38 and the like, but the holding mechanism according to the present invention is not limited to this. Instead, the respective shapes, numbers, arrangement positions, etc. of the levers and springs may be appropriately set and configured. In short, the feeding motor is provided between the time when the film is fed from the film cartridge and the time when the film is rewound. What is necessary is just to comprise so that the engagement lever 21 may be maintained in the state of being engaged with the locking member 31 even when the power supply to the locking member 31 is stopped.

[0045]

As described above, according to the first aspect of the present invention,
Is provided with a lock mechanism that locks a locking member that locks the cartridge lid in a closed state during operation of the film feeding motor in the camera body. During the operation (rotation) of the motor for use, the locking member is locked by the lock mechanism, so that the “bar code reading step”, “delivery step”,
In each of the “winding step”, “rewinding step”, and “film state displaying step”, the cartridge lid is locked in a closed state by the locking member. Therefore, in each of the above steps, since the cartridge lid is not opened unnecessarily, erroneous reading of the bar code and erroneous exposure of the film can be prevented, and the film state can be correctly displayed.

The camera according to claim 2 is the camera according to claim 1,
An engagement lever that is releasably engageable with the locking member; and a locking mechanism that drives the engagement lever to engage the locking member when power is supplied to the feeding motor. And a drive mechanism for driving the engagement lever in a direction to be disengaged from the locking member when the power supply to the feeding motor is stopped. During the operation (rotation), the engaging lever is moved to the locking member side by the driving mechanism to engage with the locking member, and the locking member is locked. In each of the steps of "reading step", "sending step", "winding step", "rewinding step", and "film state displaying step", the cartridge lid is locked in a closed state by the locking member. Therefore, as in the case of the first aspect, in each of the above steps, the cartridge lid is not opened unnecessarily, so that erroneous reading of the bar code and erroneous exposure of the film can be prevented, and the film state is correctly displayed. can do.

The camera according to claim 3 is the camera according to claim 2,
Between the time when the film is fed from the film cartridge and the time when the film is rewound, even if the power supply to the feeding motor is stopped, the engagement lever is held in the locked state by being engaged with the locking member. Since the holding mechanism is provided, even if the feeding motor is not operated between the above-described steps and these steps, the cartridge lid does not open excessively, and therefore, the bar code is erroneously read, and the film is not read. Erroneous exposure can be prevented, and the film state can be displayed correctly.

[Brief description of the drawings]

FIG. 1 shows an example of a camera according to the present invention, and is a side view of the inside of the camera showing a state in which a cartridge lid is closed.

FIG. 2 is a side view of the inside of the camera, showing a state where a cartridge lid is opened.

FIG. 3 is a rear view showing the inside of the camera, showing a state in which a cartridge lid is open.

FIG. 4 is a rear view showing the inside of the camera, showing a state where an engagement lever is engaged with a key gear.

FIG. 5 is a rear view showing the inside of the camera, showing a state in which a contact lever is in contact with an engagement lever.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 3 Camera main body 6 Key gear 12 Cartridge lid 20 Lock mechanism 21 Engagement lever 22 Feeding motor 23 Drive mechanism 30 Contact lever 31 Locking member 32 Holding mechanism

Claims (3)

[Claims] 1. A camera in which a film cartridge containing a film is loaded into a camera body from a cartridge lid provided therein, and wherein the film feeding motor is operated in the camera body. 2. The camera according to claim 1, further comprising a lock mechanism for locking a locking member that locks the cartridge lid in a closed state. 2. The camera according to claim 1, wherein the lock mechanism is configured to be capable of engaging and disengaging with the locking member. A drive mechanism for driving a lever in a direction to engage with the locking member, and for driving the engagement lever in a direction to be disengaged from the locking member when power supply to the feeding motor is stopped. A camera characterized by having. 3. The camera according to claim 2, wherein the power supply to the feeding motor is stopped between the time when the film is fed from the film cartridge and the time when the film is rewound. A camera, further comprising a holding mechanism for holding the engaging member in a state of being engaged with the locking member.