JP2000250109A - Film feeding device and film using device - Google Patents

Abstract

PROBLEM TO BE SOLVED: To avoid the deviation of the rotating position of a set data disk occurring because a take-up spool which becomes freely rotatable is rotated by the tension of a film after the data disk integrated with the film rewinding and take-up spool is set. SOLUTION: This film feeding device is provided with a spool driving member 2 engaged with the film take-up spool 1a of a film cartridge 1 so as to drive the spool 1a to be rotated and a rotation transmission member 4 engaged with the driving member 2 only when prescribed rotating positional relation is established to the driving member 2 so as to transmit driving force. Besides, it is provided with a resistance imparting means 6 imparting resistance to the rotation of the driving member 2 when at least the transmission member 4 is rotated within a range that the rotating positional relation other than the prescribed rotating positional relation is established between the driving member 2.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film feeding apparatus for driving a take-up spool in a film cartridge to feed a film from the cartridge or rewind the film into the cartridge.

[0002]

2. Description of the Related Art A so-called IX240 type film cartridge records information such as a photographing state and a date on a magnetic layer provided on a film surface so that good printing can be performed at the time of printing. In addition to the magnetic layer, the film cartridge rotates together with the film take-up spool in the cartridge, and a rotation indicator member for displaying a data disk on which a bar code is drawn and a use state mark (hereinafter referred to as VEI). Is provided so that information about the film in the cartridge can be transmitted to a camera or a photographer.

Here, some cameras using such a type of film cartridge are configured to transmit power to a mechanism other than the film feeding by using the rotational force of a fork gear for feeding the film as a power source. is there. For example, a data disk or VEI is set by rewinding rotation following the rewinding operation, and then the fork gear is wound up and rotated to open the cartridge chamber lid. There is a configuration in which a data disk or VEI is set by rotation, and a fork gear is later wound up and rotated to release the opening prohibition mechanism of the cartridge chamber lid.

[0004] As a configuration common to these conventional cameras, both of them rotate the fork gear after setting the data disk or VEI, so that the rotational position of the bent data disk or VEI is not changed.
Separate fork and fork parts of the fork gear, provide play for rotation on both parts, and rotate the fork even if the gear part hoists and rotates to transmit power to the opening / closing mechanism of the cartridge chamber lid. The configuration is not adopted.

[0005]

In the above-mentioned conventional camera or film feeder, the fork is not driven to rotate even if the gear starts to wind up, but conversely, the fork rotates. On the contrary, it is completely free.

Here, in the cartridge immediately after the completion of the rewinding, the film is in a tightly wound state, and a rotational urging force in the winding direction may act on the take-up spool itself due to the tension of the film. In this case, the fork portion is in a free state, and the take-up spool fitted with the key is also in a free state, so that the take-up spool rotates due to the tension of the film, and the rotation of the set data disk or VEI. The position may be shifted.

Therefore, in the present invention, the film feeding is made such that the free rotation of the take-up spool of the cartridge immediately after the completion of rewinding or the like is suppressed, and the rotation phase of the set data disk or VEI can be prevented from being shifted. It is intended to provide a device and a camera.

[0008]

According to the present invention, there is provided a spool driving member which engages with a film take-up spool of a film cartridge to rotationally drive the spool. And a rotation transmitting member that engages with the spool driving member and transmits a driving force only when the rotation transmitting member is in a predetermined rotational positional relationship. A resistance applying means is provided for applying resistance to rotation of the spool driving member when rotating in a range having a rotational position relationship other than the rotational position relationship.

Specifically, as the resistance applying means, an elastic member which presses against the spool driving member and gives resistance to rotation is provided.

Thus, for example, after the film is rewound and the data disk (information recording section) or VEI (information display section) integrally provided on the take-up spool is set to an appropriate rotation phase, the spool drive is started. Even if the spool driving member is disengaged from the rotation transmitting member that rotates to transmit the driving force to an operating mechanism other than the member (for example, the opening / closing mechanism of the cartridge chamber lid), the resistance received from the resistance applying unit is not applied. The rotation of the spool driving member is suppressed by the force. Therefore, even if a film tension or the like acts on the take-up spool, the rotation of the take-up spool is also suppressed as long as it is engaged with the spool drive member whose rotation is suppressed, and the rotation of the set data disk or VEI is prevented. It is possible to prevent the phase from being shifted.

The resistance applying means applies resistance to the spool driving member when the rotation transmitting member rotates within a rotational position relationship other than the predetermined rotational position relationship with respect to the spool driving member. When the member rotates in the predetermined rotational positional relationship with respect to the spool driving member, a member that releases the resistance application to the spool driving member may be provided. According to this, it is possible to cancel the resistance application when the resistance becomes an excessive load, such as when feeding the film or winding the film, and the driving source such as a motor provided with the resistance applying means is provided. Can be prevented from increasing in size.

[0012]

(First Embodiment) FIG. 1 shows a film feeder according to a first embodiment of the present invention. The film feeding device is provided in a camera which is one of the film using devices, and sends out the film from the cartridge by rotating a film take-up spool in the cartridge (thrust). A film cartridge (such as an IX240 film cartridge) is used.

FIGS. 2 to 4 are model diagrams conceptually showing the operation of the present apparatus, and also partially serve as block diagrams.

As shown in FIG. 1, the film cartridge 1 has a take-up spool 1a for taking up a film F. The spool 1a has a bar code indicating information on the film F (or film cartridge). Before loading the cartridge into the data disk 1b or the photographer, the film F in the cartridge 1 is drawn.
A VEI (not shown) for displaying the use state of the device is provided.

A hole is formed in the upper wall of the cartridge chamber 3, and a reflective photoreflector 7 for reading a bar code of the data disk 1b is arranged in this hole.

For example, after the photographing of the film F is completed and the film F is automatically rewound, or by the photographer's will,
Is wound back halfway, the take-up spool 1a is stopped so that the reading end of the bar code of the data disk 1b faces the photoreflector 7.
Next, when the film cartridge 1 is loaded and the thrust feed of the film F is started, the use state of the film F (completely photographed or partially photographed) is read through the photo reflector 7 quickly and accurately. Can be. The same applies to the VEI. By stopping the take-up spool 1a at a position where the display corresponding to the use state of the film F is made by the VEI, the use state of the film F can be accurately displayed.

A fork (spool drive member) 2 is key-fitted to the upper end of the take-up spool 1a of the film cartridge 1 loaded in the cartridge chamber 3, and is rotatable integrally. The fork 2 is rotatably fitted and held in the cartridge chamber 3. A gear (rotation transmitting member) 4 that is rotatable coaxially with the fork 2 is fitted and held in the cartridge chamber 3. The gear 4 is moved in both forward and reverse directions by a feeding motor 5 shown in FIG. Is driven to rotate.

The fork 2 has a locking portion 2-a projecting radially outward at one location in the circumferential direction. On the other hand, the gear 4 is also provided with a locking portion 4a projecting radially inward at one location in the circumferential direction. For this reason,
When the motor 5 rotates and the gear 4 rotates, as shown in FIGS. 2A and 2B, the gear 4 is engaged with the fork 2 by the engagement between the engagement portion 4a and the engagement portion 2a. Fork 2 only when the rotational position relationship (predetermined rotational position relationship)
Is driven to rotate. 2A shows an operation during the thrust feeding of the film F, and FIG. 2B shows an operation during the rewinding of the film F. The fork 2 is moved between the thrust feeding and the rewinding. The contact surface between the locking portion 2-a and the locking portion 4a of the gear 4 is switched.

Further, in a range where the gear 4 has a rotational positional relationship (a rotational positional relationship other than a predetermined rotational positional relationship) with the fork 2 in which the engaging portion 4a and the engaging portion 2a do not engage with each other,
The transmission of the driving force from the gear 4 to the fork 2 is not performed, but the rotating force of the gear 4 at this time is used as the driving force of the opening / closing lock mechanism of the cartridge chamber lid (opening / closing member) 8 shown in FIG. .

Further, as shown in FIG. 1, a spring (resistance applying means) 6 is arranged in a compressed state between the upper end surface of the fork 2 and the apparatus main body (for example, camera main body) 30. When the lower end of the spring 6 is pressed against the upper end surface of the fork 2 by the elastic force generated by the spring 6, the fork 2 is given resistance to rotation.

Next, the structure of the opening / closing mechanism of the cartridge chamber lid 8 will be described with reference to FIG. Cartridge chamber lid 8
Is locked by the locking claw 9 so as not to open in the closed position. The locking claw 9 is urged to rotate in the locking direction by a closing spring 10. When the locking claw 9 is at the lock position, the lid closing switch (SW1) 11 is turned on.

The release lever 12 is rotatably supported by the movable base 13 and is urged to rotate clockwise by a first tension spring 14. The moving table 13 is slidably held on the wall of the cartridge chamber 3 or the like.
It is urged downward in the figure by a second tension spring 15.

In the state shown in FIG. 2A, the release lever 1
Reference numeral 2 denotes a rotation restriction by the first arm portion 12a abutting against a stopper 16 formed on a wall or the like of the cartridge chamber 3. The second arm 12b of the release lever 12
Can be brought into contact with the rotation drive section 9-a of the locking claw 9.

A movable yoke 20 is fixed to the movable table 13 and is pulled upward together with the movable table 13 in the figure by the magnetic force of the electromagnet 17.

Two projections 4-b are formed on the upper surface of the gear 4 at two positions in the circumferential direction (0-degree position and 180-degree position), so that the movable table 13 is pulled up by the electromagnet 17. The first arm portion 12a of the release lever 12 abuts on the side surface of the projection 4b.

An opening switch (SW2) 18 for opening the cartridge chamber lid 8 is provided. When the opening switch (SW2) 18 is turned on, the microcomputer 19 locks the cartridge chamber lid 8 by closing. Release control is performed.

Next, the operation of the film feeding apparatus and the cartridge chamber lid opening / closing mechanism of the present embodiment will be described with reference to the flowcharts of FIGS. In addition,
The flowchart of FIG. 5 shows a film rewinding operation (FIG. 2).
(B))-the operation of releasing the closed lock of the cartridge chamber lid 8 (FIG. 3 (a)) to the operation of maintaining the lock release (FIG. 4 (a)).

In "Step 1", as shown in FIG. 2B, the gear 4 is moved in the film rewinding direction (the direction of the arrow in the figure).
The feed motor 5 is rotated so as to rotate in the direction shown in FIG. The engagement of the locking portion 4a of the gear 4 with the locking portion 2a of the fork 2 causes the fork 2 to be rotationally driven in the same direction.
The take-up spool 1a in the cartridge 1 fitted with the key is also driven to rotate in the same direction. As a result, the film F is rewound into the cartridge 1.

In step 2, whether or not the rewinding of the film F into the cartridge 1 has been completed and the setting of the data disk 1b or VEI has been completed by further rotating the take-up spool 1a in the rewinding direction. Judge. When the setting is completed, the process proceeds to step 3. The setting of the data disk 1b and the VEI is performed by a known control utilizing the fact that the photointerrupter 7 detects a barcode drawn on the data disk 1b.

In "Step 3", the data disk 1b
And so on, the rewind rotation of the motor 5 is stopped. At this point, the data disk 1b is stopped at a predetermined rotation position (a rotation position indicating the use state of the film cartridge).

In step 4, it is determined whether or not the opening switch (SW2) 18 has been turned on by a user who intends to open the cartridge chamber lid 8 to remove the cartridge 1. The determination is repeated until the opening switch (SW2) 18 is turned on.

In Step 5, the electromagnet 17 is energized. As a result, as shown in FIG.
Moves upward in the figure against the tension of the second tension spring 15. Accordingly, the release lever 12 also moves upward.
In this state, the first arm 12a of the release lever 12
Abut on the projection 4-b.

In step 6, the feed motor 5 is rotated so that the gear 4 rotates in the winding direction (the direction of the arrow in the figure) as shown in FIG. Thereby, the locking portion 4a of the gear 4 moves away from the locking portion 2a of the fork 2. On the other hand, the projection 4b of the gear 4 contacts the first arm 12a of the release lever 12. As a result, the release lever 12
It rotates counterclockwise in the figure against the tension of the tension spring 14. Then, the second arm portion 12 b pushes the rotation driving portion 9 a of the locking claw 9, and the locking claw 9 rotates clockwise against the rotational urging force of the closing spring 10. Thereby, the lock of the cartridge chamber lid 8 is released, and the cartridge chamber lid 8 is opened.

Next, at "Step 7," it is determined whether or not the lid closing switch (SW1) has been turned off during the series of operations up to this point. This determination is repeated until it is determined to be off,
If it is determined to be off, the process proceeds to step 8.

In Step 8, a lid closing switch (S
When W1) is turned off, a timer in the microcomputer 19 is started. This is for maintaining the rotation of the gear 4 in the winding direction for a predetermined time after the lock of the cartridge chamber lid 8 is released. There are two reasons.

The first reason is that, in the state shown in FIG. 3A, the first tension spring 14 and the closing spring 10 apply a rotational urging force to the gear 4 in the counterclockwise direction. Gear 4 rotates due to vibration, etc.
Finally, there is a possibility that the fork 2 will be rotated.
For this reason, it is necessary to sufficiently rotate the gear 4 at least until the contact between the projection 4b and the first arm 12a is released.

The second reason is that when the contact between the projection 4b and the release lever 12 disappears from the state shown in FIG. 3A, the locking claw 9 rotates counterclockwise by the urging force of the closing spring 10. Will be done. As a result, the lid closing switch (SW1) 11 is turned on even though the cartridge chamber lid 8 is not closed and locked. Therefore, FIG.
(B) As shown in FIG.
It is necessary to rotate the locking claw 9 clockwise until it engages with the hook locking portion 31 provided on the camera body or the like to restrict the rotation of the locking claw 9. Therefore, gear 4
Must be rotated at least to a position where the rotation of the locking claw 9 is restricted.

However, if the gear 4 is simply wound up and continued to rotate, the engaging portion 4-a of the gear 4 is engaged with the engaging portion 2a of the fork 2.
And the fork 2 is rotated, so that the locking portion 4a of the gear 4 is
The gear 4 must be stopped from rotating in the winding direction before coming into contact with a. For this reason, in the present embodiment, prediction is performed based on the time from when the OFF signal of the lid closing switch (SW1) 11 is input, and the above-described control is performed.

At "Step 9", it is determined whether or not a sufficient time A has elapsed for the above-described control. FIG. 3C shows the state after the passage. In this state, the release lever 12 that has lost contact with the projection 4 b of the gear 4 is subjected to clockwise rotation restriction by the stopper 16, and the locking claw 9 engages the rotation stopping hook 9 b with the hook locking portion 31. The rotation in the counterclockwise direction is regulated by the combination. Until the time A elapses, the determination in this step is repeated, and when the time A elapses, the process proceeds to step 10.

In step 10, as shown in FIG. 4A, the engaging portion 4 a of the gear 4 is engaged with the engaging portion 2 a of the fork 2.
The motor 5 is stopped and the gear 4 is also stopped before contacting the motor.

Subsequently, in step 11, the electromagnet 17
Is stopped, and the movable base 13 is returned to the original position. In this state, the cartridge 1 can be taken out of the camera.

Up to this point, the operation for opening the cartridge chamber lid 8 has been described. However, the actual camera operation also requires the cartridge chamber lid 8 to be closed. This is shown in FIG.
(B). When the cartridge chamber lid 8 is closed, the rotation stopping hook 9b of the locking claw 9 becomes
And the rotation stopping hook 9b is pushed by the hook locking portion 31.
Get off.

As a result, the locking claw 9 rotates counterclockwise by the urging force of the closing spring 10, and the locking claw 9 engages with the cartridge chamber lid 8 to lock it in the closed state. At the same time, the lid closing switch (SW1) 11 is turned on. In this state, if the cartridge 1 is reloaded, the operation shifts to a shooting operation such as a film feeding operation again.

In the above description, in “Step 6”,
When the gear 4 rotates in the winding direction and the locking portion 4a separates from the locking portion 2a of the fork 2, the locking portions 2a, 4
a fork 2 whose rotation is restricted by the engagement of
There is no rotation regulation. For this reason, a rotational force acts on the fork 2 by the tension of the film F immediately after the completion of the winding in the cartridge 1 (the force that tries to spread from the tightly wound state). However, in the present embodiment, the fork 2 receives resistance to rotation by the compression spring 6 and is hard to rotate, so that the take-up spool 1a fitted with the key does not rotate easily. For this reason, the rotation phase of the set state of the data disk or VEI does not shift due to the film tension. This is illustrated, for example, in FIG.
This is shown by the fact that the rotational position of the fork 2 shown in FIG. 3A and FIG. 3B (the position shown by the broken straight line) has not changed.

In this embodiment, the case in which the closing of the cartridge chamber lid 8 is released by the rotation of the gear 4 after the film has been rewound has been described. Driving may be performed.

(Second Embodiment) FIG. 6 shows a second embodiment of the present invention.
1 illustrates a film feeding device according to an embodiment. In the first embodiment, the case where the spring 6 is used as the resistance applying means and the rotational resistance is always applied to the fork 2 has been described. However, in the present embodiment, the position in which the fork 23 is pressed against the upper end surface 23a and the upper end surface 23a are determined. A clutch plate 22 that can move (rotate) between the separated positions is used as resistance applying means, and the clutch plate 22 is moved between the two positions by a retracting operation (on) and a projecting operation (off) of the electromagnetic plunger 21. I try to make it. The clutch plate 22 applies resistance to the rotation of the fork 23 by pressing against the upper end surface 23 a of the fork 23.

The configuration and operation other than those described above are the same as in the first embodiment.

FIG. 6B shows a state in which power is not supplied to the plunger 21, and the clutch plate 22 is separated from the upper end surface 23 a of the fork 23. For this reason, the fork 23 can rotate freely, and receives the rotational force of the gear 4 and transmits the thrust feed rotational force and the rewind rotational force to the take-up spool 1a.

FIG. 6A shows a state in which the plunger 21 is energized.
Is pressed against the upper end surface 23a. The power supply to the plunger 21 is performed when the gear 4 rotates in the winding direction after rewinding the film, that is, during a period when the take-up spool 1a must be kept in a non-rotating state.

As described above, according to the present embodiment, rotation resistance can be applied to the fork 23 and the take-up spool 1a only when it is necessary to hold the take-up spool 1a in a non-rotating state. As compared with the first embodiment, the load on the normal film feeding can be reduced, and the motor 5 can be prevented from being enlarged due to an increase in the film feeding load.

The structure for applying or releasing the rotation resistance to the fork is not limited to the structure of the present embodiment.

Also, in each of the above embodiments, the case where the opening / closing mechanism of the cartridge chamber lid 8 is driven by the rotation of the gear 4 after the film is rewound in the film feeder provided in the camera has been described. The film feeding apparatus of the present invention can be applied to an apparatus using a film other than a camera, and can also be applied to an apparatus that drives an operating mechanism other than the opening / closing mechanism of the cartridge chamber lid by rotating the gear 4. it can.

[0053]

As described above, according to the present invention,
After the rotation of the spool driving member by the rotation transmitting member is completed, for example, when the rotation transmitting member rotates within a range in which the driving force is not transmitted to the spool driving member in order to transmit the driving force to an operating mechanism other than the spool driving member. Since the rotational resistance is applied to the spool driving member by the resistance applying means, the rotation of the spool driving member can be suppressed and the spool driving member can be kept stopped.

For this reason, for example, the take-up spool in the cartridge is driven by the spool drive member to rewind the film, and the information recording unit and the information display unit provided integrally with the take-up spool are set to appropriate rotation positions. After that, even if the rotation transmitting member rotates to drive the operation mechanism, the winding spool rotates due to the film tension or the like acting on the spool as long as it is engaged with the spool driving member whose rotation is suppressed. Can be prevented.
Therefore, it is possible to prevent the rotational position of the set information recording unit or information display unit from being shifted.

If the resistance applying means is capable of canceling the application of resistance to the spool drive member, the spool drive member or the film take-up spool can be rotated only when it is necessary to suppress the rotation of the spool drive member or the film take-up spool. Can be provided. Therefore, it is possible to prevent an unnecessary load from being applied to normal film feeding such as film feeding and rewinding, and it is possible to prevent a drive source such as a motor provided with the resistance applying unit from being enlarged. .

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a film feeding device according to a first embodiment of the present invention.

FIG. 2 is an operation explanatory view of the film feeder and the opening / closing mechanism of a cartridge chamber lid.

FIG. 3 is an operation explanatory view of the film feeding device and the opening / closing mechanism of a cartridge chamber lid.

FIG. 4 is an operation explanatory view of the film feeding device and the opening / closing mechanism of a cartridge chamber lid.

FIG. 5 is an operation flowchart of the film feeding device and the opening / closing mechanism of the cartridge chamber lid.

FIG. 6 is a sectional view of a film feeding device according to a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Film cartridge 1a Film take-up spool 1b Data disk 2, 23 Fork 2a Locking part 3 Cartridge chamber 4 Gear 4a Locking part 4b Projection 5 Feeding motor 6 Compression spring 7 Photoreflector 8 Cartridge chamber lid 9 Locking claw 9a Rotation Driving unit 9b Rotation stop hook 10 Closing spring 11 Lid closing switch (SW1) 12 Release lever 12a First arm 12b Second arm 13 Moving table 14 First tension spring 15 Second tension spring 16 Stopper 17 Electromagnet 18 Open switch ( SW2) 19 microcomputer 21 electromagnetic plunger 22 clutch plate

Claims (11)

[Claims] 1. A spool drive member which engages with a film take-up spool in a film cartridge and drives the spool to rotate, and the spool drive member only when the spool drive member has a predetermined rotational positional relationship with respect to the spool drive member. A rotation transmitting member that transmits a driving force by engaging with the spool driving member in a rotation position relationship other than the predetermined rotation position relationship with the spool driving member. A film feeding device comprising a resistance applying means for applying resistance to rotation of the spool driving member when rotating. 2. The rotation transmitting member applies a driving force to an operating mechanism other than the spool driving member when the rotation transmitting member rotates in a range having a rotational position other than the predetermined rotational position relative to the spool driving member. The film feeding device according to claim 1, wherein the transmission is performed. 3. The film feeding device according to claim 1, wherein the resistance applying unit is an elastic member pressed against the spool driving member. 4. The film feeding device according to claim 3, wherein the elastic member is a compression spring. 5. The resistance applying means applies resistance to the spool driving member when the rotation transmitting member rotates within a range of a rotational position relationship other than the predetermined rotational position relationship with respect to the spool drive member. 3. The film according to claim 1, wherein when the rotation transmitting member rotates in the predetermined rotational positional relationship with respect to the spool driving member, the resistance application to the spool driving member is released. Feeding device. 6. The resistance applying means moves between a position at which resistance is applied to the spool driving member and a position at which resistance application is canceled according to ON / OFF of an electromagnetic solenoid. 6. The film feeding device according to 5. 7. The apparatus according to claim 1, further comprising an opening and closing member for opening and closing the film cartridge loading chamber, wherein the operating mechanism is a mechanism for opening and closing the opening and closing member. Film feeder. 8. An apparatus according to claim 1, further comprising an opening and closing member for opening and closing the film cartridge loading chamber, wherein the operating mechanism is a mechanism for at least one of closing and unlocking the opening and closing member. 8. The film feeding device according to any one of items 1 to 7. 9. The film cartridge according to claim 1, wherein the film cartridge is of a type in which the film is sent out of the cartridge by rotating the film take-up spool. Film feeder. 10. The film take-up spool is provided with an information recording unit that enables reading of information about the film in a state where the spool is stopped at a predetermined rotation position or an information display unit that displays information about the film. The resistance applying means may be configured such that after at least the film rewinding drive of the spool driving member by the rotation transmission member is stopped, and the film winding spool stops at the predetermined rotation position, 10. A rotation resistance of the spool driving member is imparted to the drive member when rotating in a range having a rotational position relationship other than the predetermined rotational position relationship with respect to the drive member. Film feeder. 11. A film using apparatus comprising the film feeding apparatus according to claim 1. Description: