JP2001056496A - Camera - Google Patents

Abstract

PROBLEM TO BE SOLVED: To enable the cover of a cartridge chamber to be locked while the light shielding cover of a film cartridge is opened. SOLUTION: A cam plate 33 is fitted to a slide cover covering a camera main body. The cover of the cartridge chamber in which the film cartridge 8 is loaded is always covered with the slide cover and it can be opened only when the slide cover is.set at the exchanging position of the cartridge. A friction plate 67 arranged in a film feeding mechanism is constituted so that a lock lever 71 is pressed toward the outside of the camera main body by cam pieces for lock 67a and 67b formed at the outside circumference thereof at a film winding-up time and a film rewinding time. Then, the slide cover is prevented from being slid to the exchanging position of the cartridge by the lever 71 by engaging a lock pawl 35 with the side surface 33e of the plate 33.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera, and more particularly, to a camera for preventing a cartridge chamber cover from being erroneously opened.

[0002]

2. Description of the Related Art A camera is provided with a cartridge chamber in which a film cartridge is loaded and a cartridge chamber lid for opening and closing the cartridge chamber. Also, various methods described below have been invented to prevent the opening of the cartridge chamber cover when a film cartridge is loaded in the cartridge chamber.

For example, Japanese Patent Application Laid-Open No. 7-319057 discloses an invention in which a cartridge chamber lid is locked by using rotation of a film feeding motor in a film winding direction. Japanese Patent Application Laid-Open No. 7-199305 discloses a method of detecting whether or not a photo film is protruding from a cartridge body and locking the lid of the cartridge chamber when the photo film is protruding. Further, Japanese Patent Application Laid-Open No. 63-70540 describes a method of locking a cartridge chamber lid using an actuator, a motor, or the like.

Further, in a camera loaded with an IX240 type film cartridge provided with a use state display mechanism for displaying the use state of a photographic film according to the stop position of the spool, the use state display is unused, in the middle of photographing, or in the state of photographing. A method has been devised which allows the cartridge chamber lid to be opened only when it is in each position.

Japanese Patent Application Laid-Open No. 7-13242 discloses that
A camera having a slide cover slidable between a use position and a non-use position is described. The cartridge cover is prevented from being opened by pressing the cartridge chamber lid with the slide cover.

[0006]

However, the invention described in Japanese Patent Application Laid-Open No. 7-319057 has a problem that the cartridge chamber lid is not locked while the feeding motor is being rotated in the film rewinding direction. Was.

Further, in a camera using an IX240 type film cartridge, after the photographic film is rewound, the use state display mechanism is set in a state where the light blocking cover at the film entrance is opened. For this reason,
In the invention described in JP-A-199305, the cartridge chamber lid may be opened when the use state display mechanism is set.

Further, the invention described in Japanese Patent Application Laid-Open No. 63-70540 causes problems such as an increase in power consumption and an increase in cost, and it is necessary to secure an arrangement space.

In the method using the use state display mechanism of the film cartridge, since the use state display changes with the rotation of the spool of the film cartridge, the cartridge chamber cover is opened at a specific timing when winding or rewinding the photographic film. Was sometimes done.

Further, in the camera described in Japanese Patent Application Laid-Open No. Hei 7-13242, since the lock mechanism is not provided on the slide cover, the slide cover can be slid at any time to open the cartridge chamber lid.

Further, if the cartridge chamber lid is forcibly urged in the opening direction during the unlocking operation of the cartridge chamber lid, the operation of the lock mechanism is obstructed,
There was a problem that the lock mechanism was damaged.

SUMMARY OF THE INVENTION The present invention has been made to solve the above problems, and has as its object to provide a camera in which a cartridge chamber lid is securely locked when a light-shielding lid of a film cartridge is open. And

[0013]

SUMMARY OF THE INVENTION In order to solve the above-mentioned problems, a camera according to the present invention performs a predetermined amount of rotation after the rotation direction of the feeding motor is switched, and then performs the rotation of the feeding motor. Using a delay mechanism that transmits rotation to the film feeding mechanism with a delay, and using a rotation of the feeding motor during a period in which the film feeding mechanism is not driven by the delay mechanism during the film winding drive and the film rewind driving. And a cartridge chamber lid lock mechanism for locking the cartridge chamber lid at the closed position.

The unlocking of the cartridge chamber cover lock mechanism is performed by rotating the feed motor in the film winding direction after the completion of film rewinding, and rotating the feed motor during a period in which the film feed mechanism is not driven by the delay mechanism. This is done by using.

Further, the cartridge chamber lid lock mechanism includes a cam member which moves between a winding lock position and a rewind lock position by rotation of the feeding motor during a period in which the film feeding mechanism is not driven by the delay mechanism. And a lock member which is pressed by the cam member when the cam member is at the winding lock position and the rewind lock position to engage with and lock the cartridge chamber lid opening / closing mechanism.
The lock of the cartridge chamber lid lock mechanism is released by moving the lock member away from the cartridge chamber lid opening / closing mechanism when the cam member is at the unlock position.

Further, a lock release detecting sensor for detecting the lock release by the cartridge chamber lid locking mechanism is provided, and when a release signal is not detected after a predetermined time has elapsed from the start of rotation of the feeding motor, a release error process is performed. It is something to do. Further, a motor sensor for detecting the rotation of the film feeding motor is provided to control a certain amount of rotation of the feeding motor in the film winding direction when unlocking the lock of the cartridge chamber lid. is there.

Further, when the rotation direction of the feed motor is switched, the rotation speed of the feed motor is increased only until the cartridge chamber lid is locked, so that an area where the lock of the cartridge chamber lid is unlocked is increased. It is intended to pass quickly.

Further, the cartridge chamber lid locking mechanism is such that even if the cartridge chamber lid is urged toward the open position during the unlocking operation, the unlocking operation is not hindered.

Further, as a cartridge chamber lid opening / closing mechanism,
The non-shooting position and the shooting position can be freely moved between a non-shooting position where shooting is not performed, a shooting position where shooting can be performed, and a cartridge replacement position where film cartridge can be replaced. In this case, a cover member is used to cover the cartridge chamber lid and prevent the cartridge chamber lid from being opened and closed.

[0020]

FIG. 1, FIG. 2, and FIG. 3 are external perspective views showing states of a camera 2 embodying the present invention when not in use, when photographing, and when replacing a cartridge. Camera 2
Is a camera body 3 of a substantially rectangular shape in which various photographing mechanisms are incorporated, and a slide cover 4 attached to the camera body 3 so as to be covered from the side and slidable.
Consists of The slide cover 4, which is a cover member, is formed of a lightweight, high-strength material such as plastic, aluminum, or titanium.

When the camera 2 is not used, almost the entire area of the camera body 3 is accommodated in the slide cover 4 so that the camera 2 is compact. During shooting, the camera body 3 is pulled out from the slide cover 4 and used as a grip. When the cartridge is replaced, the cartridge chamber cover 6 hidden by the bottom surface of the slide cover 4 is completely exposed. Thus, the IX240 type film cartridge 8 can be loaded or unloaded into the cartridge chamber 7 closed by the cartridge chamber lid 6.

The slide cover 4 moves the non-photographing position shown in FIG. 1 and the photographing position shown in FIG.
It is stopped at four positions: a cartridge replacement position shown in FIG. 3, and a lock position (not shown) between the photographing position and the cartridge replacement position. The slide cover 4 also has a function as an operation member of a power switch. When the slide cover 4 is slid to the shooting position, the power of the camera body 3 is turned on,
When the camera body 3 is at a position other than the photographing position, the power of the camera body 3 is turned off.

On the front and upper surfaces of the camera body 3, a lens barrel 10, a strobe light emitting section 11, a finder 12, a photometric light receiving window 13, a distance measuring light emitting window 14a, and a distance measuring light receiving window 1 are provided.
4b, an unlocking operation member 15 and the like are provided. The light-receiving window 14b for distance measurement has a transparent protective plate attached to an opening provided on the front surface of the slide cover 4, and is provided on the front surface of the camera body 3 when the slide cover 4 is slid to the photographing position. Facing the light receiving sensor for distance measurement.

The lens barrel 10 incorporates a telephoto optical system including a photographic lens 16, and is retracted inside the camera body 3 when the power of the camera 2 is turned off, and is extended at the same time when the power is turned on. The strobe light emitting unit 11 is rotatable between an exposure position popped up from the camera body 3 and a storage position housed in the camera body 3.
Is pulled out from the slide cover 4 and at the same time moves to the exposed position by the bias of the spring. Lock release operation member 15
Releases the cover lock mechanism that locks the slide cover 4 at the photographing position when the slide cover 4 is moved from the photographing position to the cartridge replacement position.

As shown in FIG. 4 showing a state in which the slide cover 4 is removed from the camera body 3, a liquid crystal panel 18, various setting switches 19, a photographing size switch 20, and two zoom switches are provided on the back of the camera body 3. 21
a, 21b, etc. are provided. Various setting switches 19
Includes a midway rewind switch and the like. When the slide cover 4 is slid to the shooting position, the zoom switches 21a and 21b face the semicircular zoom buttons 22a and 22b provided on the back surface of the slide cover 4. Thereby, the zoom switches 21a and 21b can be operated via the zoom buttons 22a and 22b.

A shutter switch 24 is provided on the upper surface of the camera body 3 so that the distance measuring device and the photometric device in the camera body 3 perform distance measurement and photometry when the camera is half-pressed, and the shutter unit performs shutter release when fully pressed. Is provided.
The shutter switch 24 is operated via the shutter button 25 when the shutter button 25 provided on the upper surface of the slide cover 4 faces the slide cover 4 when the slide cover 4 is in the shooting position.

A cartridge chamber cover 6 for opening and closing the cartridge chamber 7 is attached to the bottom of the camera body 3. As shown in FIG. 5, the cartridge chamber lid 6 has a substantially plate shape, and one side 6a is pivotally mounted near the center of the bottom surface of the camera body 3, as shown in FIGS. Thus, the cartridge chamber 7 is rotatable between a closed position for closing the cartridge chamber 7 and an open position for opening the cartridge chamber 7 as shown in FIG. On the opposite side of the cartridge chamber 7 with the lens barrel 10 interposed therebetween, a film chamber (not shown) in which the photographic film 31 pulled out from the cartridge body 30 is wound up is provided.

At the bottom of the camera body 3 and beside the cartridge chamber 7, a battery 2 used as a power supply for the camera body 3 is provided.
There is provided a battery chamber (not shown) in which the battery 7 is stored.
The battery compartment is opened and closed by a battery lid 28.

A large cutout 4 is formed on the bottom of the slide cover 4.
a is formed. The notch 4a completely exposes the cartridge chamber cover 6 when the slide cover 4 is slid to the cartridge replacement position, as shown in FIG. 5C, so that the cartridge chamber 7 can be opened. Also,
When the slide cover 4 is in the non-shooting position as shown in FIG. 5A or when the slide cover 4 is in the lock position as shown in FIG. Hold down the cartridge chamber cover 6 and
Prevent inadvertent opening of. Thus, the slide cover 4 is provided with a function as a cartridge chamber lid opening / closing mechanism that holds the cartridge chamber lid at the closed position and moves the cartridge chamber lid to the open position in response to the opening operation.

Since the portion of the cartridge chamber cover 6 which is pressed down by the bottom surface of the slide cover 4 is the tip portion 6b opposite to the shaft attaching portion 6a, the cartridge is closed by the gap between the slide cover 4 and the camera body 3. The chamber cover 6 does not open. Further, since the notch 4a does not close the battery cover 28 even when the slide cover 4 is in the non-photographing position, the battery of the camera 2 can be replaced in the non-photographing state.

A rectangular cam plate 33 is attached to the inner wall on the rear side of the slide cover 4. Further, the cam plate 3 is located at a position facing the cam plate 33 on the back of the camera body 3.
3, three locking claws, a photographing position locking claw 34, a cartridge replacement locking claw 35, and a removing locking claw 36, which are engaged with the respective portions, protrude. Opening 3a of camera body 3
, The meshing teeth 33a provided below the cam plate 33,
A portion of the transmission gear 75 that meshes with 33b protrudes.

The photographing position locking claw 34 constitutes a cover lock mechanism for locking the slide cover 4 at the photographing position. The lock claw 34 for the photographing position is inserted into a slit 33c formed in the cam plate 33, and stops the slide cover 4 at the photographing position by engaging with the inner wall of the slit 33c. The photographing position lock claw 34 is pulled into the camera body 3 by operating the lock release operation member 15 provided on the upper surface of the camera body 3, and the engagement with the cam plate 33 is released.

The cartridge replacement lock claw 35 constitutes a safety lock mechanism for preventing the slide cover 4 from sliding to the cartridge replacement position. When the slide cover 4 is slid from the photographing position to the cartridge replacement position,
Side surface 3 of lock piece 33d formed below cam plate 33
3e to prevent the slide cover 4 from being inadvertently slid to the cartridge replacement position. The lock claw 35 for exchanging the cartridge is projected from the camera body 3 by the safety lock mechanism when the light-shielding lid 39 of the film cartridge 8 loaded in the cartridge chamber 7 is opened, and the photographic film 31 is moved to the cartridge body. When the light-shielding cover 39 is closed by being rewound into the camera body 3, it is drawn into the camera body 3.

Further, when the slide cover 4 is slid to the cartridge replacement position, the removal lock claw 36 is the same lock piece 3 as the cartridge replacement lock claw 35.
The slide cover 4 comes into contact with the side surface 33e of 3d to prevent the slide cover 4 from being removed from the camera body 3. The lock pawl 36 for removal is always protruded from the camera body 3, and is used for maintenance of the camera 2.
It is drawn into the camera body 3 by being operated from inside.

The film cartridge 8 loaded in the cartridge chamber 7 comprises a cartridge body 30 and a photographic film 31 stored in the cartridge body 30. A photo film 31 is provided in the cartridge body 30.
Is rotatably assembled. As shown in FIG. 6, at the end of the spool 42,
An engagement hole 42a is formed for engaging a drive shaft provided in a camera or the like, and is exposed from both end surfaces of the cartridge body 30. Further, in the cartridge body 30, the rotation of the spool 42 in the film feeding direction causes
A film delivery mechanism for delivering the photographic film 31 from the film entrance 30b (see FIG. 7) is incorporated.

In the back of the film entrance 30b of the cartridge body 30, a rod-shaped light-shielding cover 39 for opening and closing the film entrance 30b is rotatably incorporated. The central portion of the light-shielding lid 39 is formed in a plate shape as shown in FIG. 7, and as shown in FIG.
b, and as shown in FIG. 3A, it is rotated between an open position for opening the film entrance 30b. At both ends of the light-shielding lid 39, engagement holes 39a are formed to be engaged with drive shafts provided in a device such as a camera, and are exposed from both end surfaces of the cartridge body 30.

In the cartridge body 30, a data disk 44 is provided as a member that rotates with the spool.
And a display plate 45 (see FIG. 8). The data disk 44 is a circular plate-like member fixed to the end of the spool 42, and has a cartridge body 3
The type and sensitivity of the photo film 31 stored in the camera
Data such as the number of shots is described by a barcode. The barcode on the data disk 44 is exposed through an opening 30a formed on one end surface of the cartridge body 30, and is read by a barcode reader incorporated in a device such as a camera.

The display plate 45 is a component constituting a use state display mechanism of the film cartridge 8, and is a substantially fan-shaped plate member. This display board 45 is used for the data disk 4
As in the case of No. 4, it is fixed to the opposite end of the spool 42. On the end face of the cartridge main body 30 on the side where the display plate 45 is incorporated, four display openings 47a to 47d constituting a use state display mechanism are formed. As for these display openings, the circular display opening 47a indicates "unused", the semicircular display opening 47b indicates "imaging", the X-shaped display opening 47c indicates "photographed", and the square display opening 47d.
Indicates “developed”. The use state indicated by the display opening that can be confirmed by the display plate 45 when the rotation of the spool 42 is stopped indicates the use state of the stored photo film 30.

The photographic film 30 has a light-sensitive material layer formed on one surface of a support, and a transparent magnetic material applied over the entire surface to form a magnetic recording layer. A magnetic recording unit is provided below each photographing frame, and various data are recorded and read by a magnetic recording device incorporated in a device such as a camera or a print processor.

FIGS. 6 and 9 are an exploded perspective view and a plan view showing the structure of a film feeding mechanism, a delay mechanism, a cartridge chamber lid locking mechanism and the like which are arranged above and outside the cartridge chamber 7, respectively. Note that, in the present embodiment, not a camera that directly locks the cartridge chamber lid 6 but a camera that locks the slide cover 4 to prevent the cartridge chamber lid 6 from being inadvertently opened. The cartridge chamber lid lock mechanism is described as a safety lock mechanism that prohibits the slide cover 4 from sliding to the cartridge replacement position.

Reference numeral 49 denotes a toothed belt constituting the film feeding mechanism, which is formed of a flexible material such as rubber. The toothed belt 49 includes two sprockets 5
0 and the camera body 3
And reaches the vicinity of the film chamber. A sprocket 50 (not shown) is connected to a feed motor 5 incorporated in the film chamber through a plurality of reduction gears.
2 (see FIG. 21).

On the upper part of the sprocket 50, a small diameter D1
A gear 53 is provided integrally, and a D2 gear 54 meshes with the D1 gear 53. A connecting shaft 57 having a D3 gear 55 and a D4 gear 56 attached to both ends is rotatably attached to the side of the cartridge chamber 7.
The gear 55 meshes with the D2 gear 54. As a result, the rotation of the feed motor 52 transmitted through the lower portion of the camera body 3 is transmitted above the cartridge chamber 7.

The D4 gear 56 of the connecting shaft 57 meshes with a D5 gear 59 which is supported on the upper surface of the cartridge chamber 7. D
A D6 gear 60 is mounted coaxially on the upper part of the fifth gear 59. On the lower surface of the D6 gear 60, two rotationally symmetrically arranged engaging pieces 60a are integrally formed, and the D5 gear 59 is a fan-shaped engaging piece with which the engaging piece 60a of the D6 gear 60 is engaged. Two slits 59a are formed. The slit 59a of the D5 gear 59 and the engagement piece 60a of the D6 gear 60 constitute a delay mechanism of the present invention.

The D6 gear 60 meshes with the large-diameter D7 gear 62. A drive shaft 63 that engages with the engagement hole 42a of the spool 42 of the cartridge body 30 is integrally formed on the lower surface of the D7 gear 62. Key 63a of drive shaft 63
Is pressed and elastically deformed and enters the drive shaft 63, so that it can be inserted into the engagement hole 42a regardless of the rotational position of the spool 42 of the film cartridge 8.

The above-mentioned delay mechanism operates as follows. For example, the camera 2 or the photo film 31 in an unused state is used.
In the camera 2 in the state immediately before the film rewinding after the photographing of the last frame is completed, the D5 gear 59 and the D6 gear 60 are stopped in a state as shown in FIG.
When the D3 gear 55 and the D4 gear 56 are rotated in the counterclockwise direction in the figure to rotate the D7 gear 62 in the film rewinding direction counterclockwise in the figure, the D5 gear 59 meshing with the D4 gear 56 becomes clockwise. However, the rotation of the D5 gear 59 is not transmitted to the D6 gear 60 until the engagement piece 60a contacts the slit 59a. Thus, the rotation of the feed motor 52 is transmitted to the spool 42 with a delay. Also, as shown in FIG. 11, the rotation of the D5 gear 59 is prevented by the engagement piece 6 during the rotation in the film winding direction.
The rotation of the feed motor 52 is transmitted to the spool 42 with a delay, without being transmitted to the D6 gear 60 until 0a comes into contact with the slit 59a.

The D5 gear 59 is meshed with a D8 gear 65 disposed below the D7 gear 62. The D8 gear 65 has a large-diameter opening 65a formed in the center, and is rotatably supported by a boss (not shown) provided on the upper surface of the cartridge chamber 7 using the opening 65a. D8
An annular fitting portion 66 is provided integrally with the upper portion of the gear 65, and the fitting portion 66 is formed of a thin metal plate or the like.
Friction plate 67 which is a cam member formed in a V-shape.
Are fitted and frictionally coupled. Therefore, when a load is applied to the friction plate 67, slippage occurs between the fitting portion 66 and the friction plate 67, and only the D8 gear 65 rotates.

On the outer periphery of the friction plate 67, a pair of locking cam pieces 67a, 67b, and a releasing cam surface 67c provided between the locking cam pieces 67a, 67b.
And the detection section 67d are integrally formed. The detection section 67d is detected by a lock release sensor 68 disposed below the friction plate 67. The lock release sensor 68 uses a reflection type photo sensor. A pair of regulating pins 69a and 69b are provided on the upper surface of the cartridge chamber 7 and on the outer periphery of the friction plate 67 to abut against the locking cam piece 67a and the detection contact piece 67d to regulate the rotation of the friction plate 67. ing.

A lock lever 71 is swingably attached to the side of the friction plate 67. The lock lever 71 and the friction plate 67 constitute a safety lock mechanism, and the lock lever 71 functions as a lock member for the cam member. The lock lever 71
A substantially cylindrical shaft attachment portion 71a, a cam portion 71b abutting on the outer peripheral surface of the friction plate 67, a cartridge replacement lock claw 35 protruding outside the camera body 3, and a spring hooking piece 71c are provided. . The lock lever 71 is urged clockwise in the figure by a torsion spring 72 attached to the shaft attachment portion 71a from above, and the cam portion 71b always abuts the outer periphery of the friction plate 67. One end of the torsion spring 72 is hung on a spring hook 71c of the lock lever 71, and the other end is a spring hook 73 of the lock plate 73.
multiplied by a.

The friction plate 67 is stopped at three stop positions by the stop control of the feeding motor 52 and the action of the regulating pins 69a and 69b. The first stop position of the friction plate 67 is a lock release position where the release cam surface 67c faces the cam portion 71b of the lock lever 71, as shown in FIG. When the friction plate 67 is at the lock release position, the cartridge replacement lock claw 35 of the lock lever 71 does not protrude from the camera body 3, and as shown in FIG.
The slide cover 4 can be slid to the cartridge replacement position where the 3d abuts on the removal lock claw 36, and the cartridge chamber lid 6 can be opened and closed naturally.

As shown in FIG. 13, the second stop position of the friction plate 67 is such that the detecting contact 67d contacts the regulating pin 69b and the locking cam 67a contacts the cam portion 71b of the lock lever 71. This is the contact rewind lock position. When the friction plate 67 is at the rewind lock position, the cartridge replacement lock claw 35 is pressed by the friction plate 67 and protrudes from the camera body 3. Therefore, as shown in FIG. 14, when the slide cover 4 is slid to the cartridge replacement position, the slide claw 35 comes into contact with the cartridge replacement lock claw 35 and the side surface 33 e of the cam plate 33 attached to the slide cover 4. The slide of the cover 4 to the cartridge replacement position is prevented.

As shown in FIG. 15, the third stop position of the friction plate 67 is such that the locking cam piece 67a contacts the regulating pin 69a and the locking cam piece 67b is the cam portion 71b of the lock lever 71. This is the winding lock position that comes into contact with. When the friction plate 67 is at the winding lock position, the cartridge replacement lock claw 35 is pressed by the friction plate 67 and protrudes from the camera body 3. Sliding to the cartridge replacement position is prevented.

As shown in FIG. 14, the lock lever 71
When the slide cover 4 is forcibly biased toward the cartridge replacement position during the release operation of the safety lock mechanism, the slide cover 4 is pressed by the
7 in a direction away from 7. As a result, the lock lever 71 is pressed against the friction plate 67 so that the rotation of the friction plate 67 is not hindered and the safety lock mechanism is not damaged. Further, if the urging of the slide cover 4 to the cartridge replacement position is stopped during or after the unlocking operation, the lock lever 71 rotates in the direction in which the friction lever 67 comes into contact with the friction plate 67 by the urging of the torsion spring 72. Therefore, the safety lock mechanism is released, and the slide cover 4 can be slid toward the cartridge replacement position.

The lock plate 73 is integrally formed with a lock pawl 36 for removal protruding out of the camera body 3. The lock plate 73 is used for removing the lock pawl 3.
6 is mounted on the upper surface of the cartridge chamber 7 so as to project from the camera body 3. Further, when it becomes necessary to remove the slide cover 4 from the camera body 3 for maintenance or the like, a fixing screw is removed from the inside of the cartridge chamber 7. Then, the lock plate 73 is pulled into the camera body 3 by the bias of the torsion spring 72 hung on the spring hook 73a, and the slide cover 4 can be removed.

The cartridge replacement lock claw 35 of the lock lever 71 and the removal lock claw 36 of the lock plate 73 engage with the side surface 33e of the lock piece 33d of the cam plate 33. Below the lock piece 33d, two meshing teeth 33a, 33b constituting the driving rack gear 32 are formed. A transmission gear 75 with which the drive rack gear 32 meshes is supported on the outer wall on the rear side of the cartridge chamber 7. Since the transmission gear 75 does not make one rotation, only a few teeth are formed on the outer periphery, and the thickness of three teeth 75a in the substantially central portion of the several teeth is increased. , Protruding out of the camera body 3 from the opening 3a. The drive rack gear 32 meshes with teeth 75a protruding from the opening 3a.

The transmission gear 75 is meshed with a vertical rack gear 78 provided integrally with the rack plate 77. The rack plate 77 is slidably attached to the upper portion of the cartridge chamber 7 by inserting pins provided in the upper portion of the cartridge chamber 7 into the two slits 77a and 77b.
Further, a flat rack gear 79 is provided integrally with the rack plate 77, and the flat rack gear 79 meshes with a pinion gear 81 provided integrally with the light shielding cover driving member 80.

The light-shielding-lid driving member 80 has a drive shaft 83 that engages with the engagement hole 39 a of the light-shielding lid 39 of the cartridge body 30.
And the above-described pinion gear 81 and this pinion gear 8
1 and a holding plate 84 provided integrally with the upper part of the first holding member. The lower surface of the holding plate 84 is provided with a contact piece member 8 formed of a thin metal plate.
5 is attached. The contact piece member 85 comes into sliding contact with a printed circuit board 87 mounted on the upper surface of the cartridge chamber 7. The cam plate 33, the transmission gear 75, the rack plate 77, and the light shielding lid opening / closing member 80 constitute a light shielding lid opening / closing mechanism.

A pin 84a provided on the holding plate 84
And a pin 71e provided on the lock lever 71, a coil spring 88 is hooked. This coil spring 88
Works like a toggle spring in accordance with the rotational position of the light-shielding lid driving member 80, and moves the light-shielding lid driving member 80 to the light-shielding lid 39.
In the open and closed positions.

The rotation of the light-shielding cover driving member 80 between the open position and the closed position of the light-shielding cover 39 is performed during a slight slide amount between the photographing position of the slide cover 4 and the cartridge replacement position. Done. As shown in FIGS. 9 and 16, when the slide cover 4 is in the non-photographing position, the driving rack gear 32 of the cam plate 33 does not mesh with the transmission gear 75, and the light-shielding lid driving member 80 Is held in the open position. Also, as shown in FIGS. 15 and 17,
Even if the slide cover 4 is slid from the non-shooting position to the shooting position, the driving rack gear 32 and the transmission gear 75 do not mesh with each other, and the light-shielding cover driving member 80 is held at the open position of the light-shielding cover 39. 17 to 19, the teeth 33a and 33b of the driving rack gear 32 are hatched so as to be easily distinguished from the vertical rack gear 78.

As shown in FIGS. 14 and 18, when the slide cover 4 is slid from the photographing position to the cartridge replacement position, the meshing teeth 33a and 33b of the cam plate 33 mesh with the teeth 75a of the transmission gear 75, The transmission gear 75 is rotated counterclockwise in the figure. When the transmission gear 75 is rotated counterclockwise, the rack plate 77 in which the vertical rack gear 78 is engaged with the transmission gear 75 in the camera body 3 is slid to the left in the figure. When the rack plate 77 slides, the light shielding cover driving member 80 in which the horizontal rack gear 79 meshes with the pinion gear 81 moves the light shielding cover 39 as shown in FIG.
Is rotated toward a position corresponding to the closed position of the. In addition,
When the slide cover 4 is slid from the cartridge replacement position to the photographing position, an operation reverse to the above-described operation is performed, and the light-shielding lid 39 is opened.

As described above, the light shielding cover driving member 80 is moved between the open position and the closed position of the light shielding cover 39 by sliding the slide cover 4 within a small range without using a complicated mechanism having a large number of parts. Because it can be rotated,
The cost of the camera 2 can be reduced.

If the slide cover 4 is to be slid from the photographing position to the cartridge replacement position while the photographic film 31 is being pulled out from the film cartridge 8 loaded in the cartridge chamber 7, FIG. As shown in FIG. 19, the cam plate 33 abuts on the cartridge replacement lock claw 35 of the lock lever 71, so that the slide cover 4 is prevented from further sliding. When the slide cover 4 is in the lock position, the transmission gear 75 and the pinion gear 81 are slightly rotated toward the closed position of the light shielding cover 39, but FIG.
As shown in (2), the light-shielding cover 39 does not rotate enough to sandwich the photographic film 31 between the photographic film 31 and the entrance 30b, so that the photographic film 31 is not damaged.

FIG. 20 (A) shows when the light-shielding lid driving member 80 is at the open position of the light-shielding lid 39, and FIG. 20 (B) shows when the light-shielding lid driving member 80 is at the closed position of the light-shielding lid 39. FIG. 9 is a plan view showing a state of a contact member 85. A contact 87a with which the contact piece 85a of the contact piece member 85 contacts the printed circuit board 87.
And contact points 87b and 87c with which the contact piece 85b abuts, and these constitute a light-shielding lid open / close detection switch 86 for detecting the open / closed state of the light-shielding lid 39. Further, since the position of the slide cover 4 can be detected based on the state of the light-shielding lid open / close detection switch 86, the light-shielding lid open / close detection switch 86 is also used as a cover position detection switch.

The contact 87a is a common contact, and the contact piece 85a is in contact with the contact 87a regardless of the pivotal position of the light shielding cover driving member 80. The contact 87b is a contact for the open position. When the contact piece 85b is in contact with the contact 87b, the contacts 87a and 87b are connected, indicating to the microcomputer 90 that the light shielding cover 39 is at the open position. A detection signal is input. The contact 87c is a contact for a position other than the open position. When the contact piece 85b is in contact with the contact 87c, a detection signal indicating that the light shielding cover 39 is located at a position other than the open position is input to the microcomputer 90. I do. It should be noted that two contact pieces 85a and 85b are provided for preventing contact failure of the contacts.

FIG. 20C shows a state of the contact piece 85 when the slide cover 4 is at the lock position. The contact 87b of the printed circuit board 87 has a smaller area than the contact 87c. Therefore, when the light shielding cover driving member 80 is slightly turned to the closed position, the light shielding cover open / close detection switch 8
6 detects that the light shielding cover 39 has been turned to a position other than the open position. This makes it possible to detect that the slide cover 4 has been slid from the shooting position to the cartridge replacement position.

FIG. 21 is a block diagram showing an electrical configuration related to locking of the slide cover 4 of the camera 2. Each part of the camera 2 is controlled by the microcomputer 90. The microcomputer 90 has a ROM 9
1, an EEPROM 92 is connected, and controls each part of the camera 2 according to a control program and data stored in the ROM 91 to store temporary data such as an error occurrence in the EEPROM 92.

A pulse motor is used as the film feeding motor 52, and is controlled by a microcomputer 90 via a motor driver 94. The rotation of the feeding motor 52 is detected by an encoder 95 serving as a motor sensor, and is input to the microcomputer 90.

Further, the microcomputer 90 includes an unlock sensor 68, a cartridge detection switch 96 incorporated in the cartridge chamber 7 for detecting that the film cartridge 8 is loaded, and a bar of the data disk 44 of the film cartridge 8. A bar code reader 97 for reading a code, a use state detection sensor 93 for detecting the use state of the film cartridge 8, a light-shielding cover open / close detection switch 86, a magnetic head 99 for reading and writing various data in a magnetic recording section of the photographic film 31, and the like. Signals and data are input. The magnetic head 99 is driven by the head driver 100. Data writing to the photographic film 31 by the magnetic head 99 is performed at the time of winding one frame after photographing.

By the way, immediately after the rotation direction of the feed motor 52 is switched, the release cam surface 67c of the friction plate 67 comes into contact with the cam portion 71b of the lock lever 71. The lock of the cover 4 is released only for a moment. Therefore, if the slide operation of the slide cover 4 is performed when the rotation direction of the feed motor 52 is switched, the slide cover 4 may be slid to the cartridge replacement position depending on the timing.

In order to reduce the probability of such a malfunction, as shown in the timing chart of FIG. 22, the microcomputer 90 starts the rotation of the feeding motor 52 immediately after switching the rotation direction, and starts the rotation of the friction plate 67 with the friction plate 67. Only during a period until the slide cover 4 is locked by the lock lever 71, the rotation speed of the feeding motor 52 is set to be higher than the normal speed at the time of film winding and rewinding. According to this, since the lock release time of the slide cover 4 is shortened, the probability of occurrence of a malfunction can be significantly reduced. When the safety lock of the slide cover 4 is released, the feed motor 52 is rotated at a lower speed than the normal speed so that a release error does not occur.

Next, the operation of the above embodiment will be described with reference to FIG.
3 and the flowchart of FIG. 26 will be described.
As shown in FIG. 1, when the slide cover 4 is in the non-photographing position and the film cartridge 8 is not loaded in the cartridge chamber 7, the upper part of the cartridge chamber 7
The state is as shown in FIG. That is, the light-shielding lid driving member 80 is located at a position corresponding to the open position of the light-shielding lid 39, and the friction plate 67 is stopped at the unlocked position where the unlocking cam surface 67c faces the cam portion 71b of the lock lever 71. . As shown in FIG. 10, the D5 gear 59 and the D6 gear 60 constituting the delay mechanism are stopped at a position where the engagement piece 60a is shifted to one end in the slit 59a.

When the friction plate 67 is in the unlocked position, the cartridge replacement lock claw 35 of the lock lever 71 does not protrude from the camera body 3, so that the slide cover 4 is moved to the position shown in FIGS. As shown in the figure, the lock piece 33d of the cam plate 33 is
6 can be slid to the cartridge replacement position where the cartridge replacement position stops.

When the slide cover 4 reaches the photographing position, the photographing position lock claw 34 projecting from the back of the camera body 3 engages with the slit 33c of the cam plate 33 as shown in FIG. Further, the slide cover 4 is prevented from sliding further. Therefore, when the slide cover 4 is slid from the shooting position to the cartridge replacement position, the unlocking operation member 15 is slid to pull the shooting position lock claw 34 into the camera body 3.

As shown in FIG. 18, while the slide cover 4 is slid from the non-photographing position to the cartridge replacement position, particularly during a slight slide amount from the photographing position to the cartridge replacement position, as shown in FIG. ,
33b meshes with the protruding teeth 75a of the transmission gear 75,
The transmission gear 75 is rotated counterclockwise. Transmission gear 75
Is rotated counterclockwise, the vertical rack gear 78
The rack plate 77 meshed with slides toward the left in the figure. When the rack plate 77 slides, as shown in FIG. 12, the light shielding cover driving member 80 in which the pinion gear 81 meshes with the horizontal rack gear 79 rotates toward the closed position of the light shielding cover 39.

Since the camera 2 is controlled so that the power of the camera body 3 is turned on after a certain period of time after the slide cover 4 stops at the photographing position, the slide cover 4 is moved from the non-photographing position to the cartridge replacement position. Even if it slides, the power supply of the camera body 3 is not turned on unnecessarily.

When the slide cover 4 is slid to the cartridge replacement position, the cartridge chamber cover 6 is completely exposed by the notch 4a of the slide cover 4, as shown in FIG. Can be rotated. After the cartridge chamber 7 is opened, the film cartridge 8 with the light shielding cover 39 closed is inserted axially from below the camera body 3. Since the drive shaft 83 of the light shielding cover driving member 80 is at the closed position of the light shielding cover 39, the drive shaft 83 and the engagement hole 39a are immediately engaged. Although the stop position of the drive shaft 63 differs depending on the state when the film cartridge 8 was taken out last time, the drive shaft 63 is elastically inserted into the drive shaft 63. Spool 42
In the engaging hole 42a.

When the film cartridge 8 is pushed into the cartridge chamber 7, the cartridge detection switch 96 incorporated in the cartridge chamber 7 is turned on, and this detection signal is input to the microcomputer 90. After loading the film cartridge 8 into the cartridge chamber 7, the cartridge chamber lid 6 is closed.

When the slide cover 4 is slid from the cartridge replacement position to the photographing position or the non-photographing position, as shown in FIG.
The transmission gear 75 is rotated by the movement of a and 33b. When the transmission gear 75 rotates, the rack plate 77 in which the vertical rack gear 78 meshes with the transmission gear 75 slides rightward in the figure. Further, the sliding of the rack plate 77 causes the light shielding cover driving member 80 in which the pinion gear 81 meshes with the flat rack gear 79 to rotate from the closed position of the light shielding cover 39 to the open position. Thereby, as shown in FIG. 7A, the light shielding cover 39 is turned to the open position.

When the light shielding cover driving member 80 is rotated to the position where the light shielding cover 39 is opened, as shown in FIG. 20A, the contact piece 85b of the contact piece member 85 comes into contact with the contact point 87b of the printed circuit board 87. A detection signal indicating that the light-shielding lid 39 has been turned to the open position is input from the light-shielding lid open / close detection switch 86 to the microcomputer 90. Microcomputer 9
0 indicates that the film cartridge 8 has been loaded and the slide cover 4 has been slid to a position other than the cartridge replacement position based on detection signals from the cartridge detection switch 96 and the light-shielding lid open / close detection switch 86. And a data reading process is started.

In the use state detection and data reading processing,
The microcomputer 90 rotates the feed motor 52 via the motor driver 94 in the film rewind direction (reverse rotation). When the feeding motor 52 rotates in the reverse direction, the sprocket 50 shown in FIG.
4 rotates clockwise, the D3 gear 55 rotates counterclockwise, the D5 gear 59 rotates clockwise, and the D8 gear 65 rotates counterclockwise. When the D8 gear 65 rotates counterclockwise, the friction plate 67 frictionally coupled to the fitting portion 66 of the D8 gear rotates in the same direction. However, since the detection contact 67d abuts on the restriction pin 69b, the friction plate 67 is stopped at the rewind lock position. Since the rotation of the friction plate 67 is prevented, the D8 gear 65 keeps rotating while the fitting portion 66 is in sliding contact with the friction plate 67.

When the friction plate 67 is stopped at the rewind lock position, the locking cam piece 67a is
The lock lever 71 is brought into contact with the first cam portion 71b to swing the lock lever 71 to the lock position in the counterclockwise direction in the drawing against the bias of the torsion spring 72. When the lock lever 71 swings to the lock position, the cartridge replacement lock claw 3 of the lock lever 71 is moved.
Since the projection 5 projects outside the camera body 3, the slide cover 4 cannot be slid to the cartridge replacement position. As a result, the slide cover 4 does not slide to the cartridge replacement position during the use state detection and data reading processing immediately after the loading of the film cartridge, and similarly, the cartridge chamber lid 6 is not opened.

Further, even if the slide cover 4 is slid to the locked position, as shown in FIG. 5 (B), the distal end portion 6b of the cartridge chamber cover 6 is kept pressed against the bottom surface of the slide cover 4, so that the cartridge chamber cover The photographic film 31 stored by opening 6 is not exposed to light.

When the D5 gear 59 rotates by a fixed amount,
Since the slit 59a of the D5 gear 59 and the engagement piece 60a of the D6 gear 60 are engaged, the D6 gear 60 rotates clockwise in the figure, and the D7 gear 62 rotates counterclockwise in FIG. The combined spool 42 is rotated in the film rewind direction. When the spool 42 rotates in the film rewinding direction, the use state detecting sensor 93 serving as a photoelectric sensor is used.
The microcomputer 90 detects the notch in the data disk 44 and compares the position of the notch with the reference data stored in the ROM 91 or the like, thereby determining the use state of the loaded film cartridge 8.

In the data reading process, the bar code formed on the surface of the data disk 44 is read by the bar code reader 97. The barcode includes data such as the type, sensitivity, and number of shots of the photo film 31, and is used as shooting data for obtaining an appropriate shutter speed and aperture value.

The loaded film cartridge 8
When the use state of the film cartridge 8 is "photographed" or "developed", this film cartridge 8 cannot be used, and a process for allowing the loaded film cartridge 8 to be taken out is performed. First, the microcomputer 90 rotates the spool 42 in the film winding direction so that the display plate 45 faces the display openings 47c or 47d representing "photographed" and "developed" as shown in FIG. Then, the rotation of the spool 42 is stopped. After the setting of the use state display, the unlocking process of the slide cover is performed so that the incorrectly loaded film cartridge 8 can be taken out of the cartridge chamber 7.

When the use state display confirmation and data reading are completed, a film setting process for setting the unexposed frames of the photographic film 31 to the photographing position is performed. In this film setting process, the microcomputer 90 rotates the feed motor through the motor driver 94 in the normal direction. As a result, the sprocket 50 shown in FIG. 13 rotates clockwise, the D2 gear 54 rotates counterclockwise, the D3 gear 55 rotates clockwise, the D5 gear 59 rotates counterclockwise, and the D8 gear 6 rotates.
5 rotate clockwise.

When the D8 gear 65 rotates clockwise, the friction plate 67 frictionally connected to the fitting 65
Also rotate in the same direction. However, since the locking cam piece 67a abuts on the restriction pin 69a, further rotation of the friction plate 67 is prevented, and only the D8 gear 65 continues to rotate while sliding the fitting portion 66 against the friction plate 67.

When the friction plate 67 is stopped at the winding lock position, the locking cam piece 67b is moved to the lock lever 7 position.
The lock lever 71 is brought into contact with the first cam portion 71b to swing the lock lever 71 to the lock position in the counterclockwise direction in the drawing against the bias of the torsion spring 72. When the lock lever 71 swings to the lock position, the cartridge replacement lock claw 3 of the lock lever 71 is moved.
Since the projection 5 projects outside the camera body 3, the slide cover 4 cannot be slid to the cartridge replacement position. As a result, the slide cover 4 does not slide to the cartridge replacement position during the film setting process, and similarly, the cartridge chamber lid 6 does not open.

Since the friction plate 67 passes through the lock release position when rotating from the rewind lock position to the wind lock position, the lock of the slide cover 4 is released for a moment, but the timing shown in FIG. As shown in the chart, when the rotation direction of the feed motor 52 is switched, the rotation speed of the feed motor 52 is increased only until the friction plate 67 rotates to the lock position again. The slide cover 4 does not slide to the cartridge replacement position.

Also, as shown in FIG.
Is rotated by a fixed amount, the D5 gear 59 constituting the delay mechanism
Is engaged with the engagement piece 60a of the D6 gear 60, so that the D6 gear 60 rotates counterclockwise in the drawing,
The D7 gear 62 rotates clockwise, and the spool 42 engaged with the drive shaft 63 rotates in the film winding direction.
By the rotation of the spool 42 in the film winding direction, as shown in FIG. 7A, the leading end of the photographic film 31 is sent out from the film entrance 30b of the cartridge body 30 into the film passage of the camera 2, and the lens barrel 1
The paper passes through the aperture behind 0 and is fed into the film chamber.

Although not shown in detail, the take-up shaft driven by the feed motor 52 is rotated in the film chamber, and the leading end of the photographic film 31 is taken up by the take-up shaft. Since the take-up shaft is rotating at a speed slightly higher than the film sending speed by the D7 gear 62, the photographic film 31 is taken up by the take-up shaft. Between the feeding motor 52 and the D7 gear 62, specifically, the toothed belt 4
Since a clutch mechanism for idling the D7 gear 62 is incorporated between the motor 9 and the feeding motor 52, the D7 gear idles in accordance with the rotation speed of the spool 42.

When the loaded film cartridge 8 is not used, the first photographing frame is set behind the aperture. If the film cartridge 8 is in the middle of shooting, the head driver 100
The presence or absence of magnetic recording of each frame of the photographic film 31 is confirmed by the magnetic head 99 driven by the above, and the unexposed frame is detected and set on the aperture. After the setting of the unexposed frame, the camera 2 is in a standby state ready for shooting.

The user looks into the finder 12 to check the subject, and operates the zoom buttons 22a and 22b according to the size and distance of the subject. After the framing is completed, the shutter button 25 is half-pressed to cause the photometric device and the distance measuring device to measure the luminance and the distance of the subject. Thereafter, when the shutter button 25 is pressed deeply, the optical system in the lens barrel 10 moves to an appropriate focus position,
Shooting is performed with an appropriate aperture value.

When the shutter release is completed, a one-frame winding process is performed. In this one-frame winding process, the feeding motor 52 rotates forward to rotate the winding shaft of the film chamber in the film winding direction, thereby winding one frame of the photographic film 31 into the film chamber. Also, at the time of this winding,
Magnetic head 99 driven by head driver 100
Thus, magnetic recording of the photographing data is performed on the magnetic recording unit of the photographic film 31. When the next unexposed frame is set in the aperture, the feed motor 52 stops.

Since the friction plate 67 does not rotate even when the film is wound up after this one-frame shooting, the lock lever 7
The lock of the slide cover 4 by 1 is continued. Therefore, as shown in FIG. 14, even if the slide cover 4 is slid from the photographing position to the cartridge replacement position, the side face 33e of the cam plate 33 and the cartridge replacement lock claw 35
, The slide cover 4 is not slid to the cartridge replacement position. Further, as shown in FIG. 7C, the light-shielding lid 39 is not rotated so as to pinch the photographic film 31 with the film entrance 30b, so that the photographic film 31 is not pinched.

Photographic film 3 of film cartridge 8
The film rewinding process is executed when the shooting for all the shooting frames 1 is completed or when the midway rewind switch is operated. In this film rewinding process, the microcomputer 90 rotates the feed motor 52 in the reverse direction via the motor driver 94. Accordingly, as shown in FIG. 13, the sprocket 50 rotates counterclockwise, and the D8 gear 65 rotates counterclockwise. When the D8 gear 65 rotates counterclockwise, the friction plate 67 stops at the rewind lock position. Thus, the slide cover 4 does not slide to the cartridge replacement position during the film rewinding process.

When the entire photo film 31 is rewound into the cartridge main body 30, the setting process of the use state display is performed by utilizing the rotation of the feeding motor 52 in the reverse direction. In the setting process of the use state display, as shown in FIG. 8, the rotation of the spool 42 is performed so that the display plate 45 faces one of the display openings 47b and 47c indicating “during shooting” or “photographed”. Stopped. After the setting of the use state display, the release processing of the safety lock mechanism of the slide cover 4 is performed.

In the process of releasing the safety lock of the slide cover 4, the microcomputer 90 rotates the feed motor 52 in the forward direction at a low speed. Also, the amount of rotation is confirmed by an input signal from the encoder 95, and the cam surface 67c for releasing the friction plate 67 is
It is a fixed amount that comes into contact with one cam portion 71b. Note that, with this fixed amount of rotation, the slit 59a of the D5 gear 59, which constitutes the delay mechanism, and the engaging piece 60 of the D6 gear 60
Since a does not engage, the spool 42 does not rotate and the display of the use state does not shift.

When the friction plate 67 is rotated to a position where the release cam surface 67c comes into contact with the cam portion 71b of the lock lever 71, the detection contact 67d is brought into contact with the unlock sensor 6d.
The detection signal is input to the microcomputer 90.

When the safety lock mechanism is released, even if the slide cover 4 is forcibly pulled toward the cartridge replacement position, the lock lever 71 is pushed by the slide cover 4 and rotates in the direction away from the friction plate 67. Since the lock lever 71 moves, the lock lever 71 does not hinder the rotation of the friction plate 67, and the safety lock mechanism is not damaged. Further, when the urging of the slide cover 4 to the cartridge replacement position is stopped during the unlocking operation or after the unlocking operation, the lock lever 71 is biased by the torsion spring 72 to cause the friction plate 6 to move.
7, so that the safety lock mechanism is securely released.

If a detection signal is not input from the lock release sensor 68 even after a lapse of a predetermined time T from the start of the release processing of the safety lock mechanism, release error processing is performed. As this cancellation error processing,
The feed motor 52 is stopped, an error warning is displayed on a liquid crystal panel or the like, an error occurrence is recorded in the EEPROM 92, and the like. After the occurrence of the error, the setting of the use state display and the unlocking process of the slide cover 4 may be performed again automatically or by a user operation.

In the above embodiment, the feeding motor 5
The period during which the safety lock mechanism is released is shortened by increasing the rotation speed of the feed motor 52 at the time of switching the rotation direction of 2, and the probability that the slide cover 4 is erroneously slid to the cartridge replacement position is reduced. Actually, the erroneous operation of the slide cover 4 can be sufficiently prevented only by increasing the rotation speed of the feed motor 52,
By simply adding one component to the film feeding mechanism, the probability of occurrence of the erroneous opening of the slide cover 4 can be further reduced. Hereinafter, an embodiment that can further reduce the probability of occurrence of erroneous opening of the slide cover 4 will be described. Note that the same parts as those in the above embodiment are denoted by the same reference numerals, and detailed description thereof is omitted.

As shown in FIG. 27, a cam disk 105 is integrally formed on the lower surface of the D7 gear 62 provided with a drive shaft 63 which engages with the spool 42 of the film cartridge 8. On the outer periphery of the cam disk 105, a cam plate 6
7, the locking cam surfaces 106a, 106b, and 106c having the same radius as the locking cam pieces 67a, 67b, and a smaller radius than the cam surfaces 106a, 106b, and 106c, and the releasing cam surface 67c of the cam plate 67. Notches 107a, 107b, 107c having the same radius are formed.

The notches 107a, 107b, 107c are
When the display plate 45 of the cartridge main body 30 is in the “unused”, “imaging”, or “imaging” position, it faces the cam portion 109 of the lock lever 71. Lock lever 71
The cam portion 109 projects upward so as to be able to contact the cam disk 105.

When the direction of rotation of the feed motor 52 is switched, one of the cam surfaces 106a, 106b, and 106c abuts on the cam portion 109 of the lock lever 71, so that the probability of releasing the safety lock mechanism is reduced. The danger of the slide cover 4 being erroneously slid to the cartridge replacement position can be greatly reduced. Also,
During the release process of the safety lock mechanism, the cam portion 109 of the lock lever 71 and one of the notches 107a to 107c face each other, so that the lock lever 71 can be swung to release the safety lock mechanism.

In the above embodiment, a camera provided with a slide cover covering most of the camera body has been described as an example. However, the present invention provides a slide cover that opens and closes only the front and rear surfaces or the top surface of the camera. The present invention can also be applied to a camera having a slide cover that opens and closes only a part of the front surface. Further, the present invention can be applied to a camera having no slide cover. In this case, the lid of the cartridge chamber may be directly locked.

Furthermore, in the above-described embodiment, a camera loaded with an IX240 type film cartridge has been described as an example. However, the present invention can be applied to a camera loaded with a photographic film of another format such as 135 type.

[0107]

As described above, the camera of the present invention locks the cartridge chamber lid so as not to be opened by utilizing the rotation of the feeding motor in the winding and rewinding directions. The photographic film can be shielded from light by preventing the cartridge chamber cover from being erroneously opened even when performing a proper process. In addition, since the rotation of the feed motor is not immediately transmitted to the film feed mechanism by the delay mechanism, even with a film cartridge equipped with a use state display mechanism, lock and unlock can be performed without changing the display contents of the use state. And can be done.

Further, when the cartridge chamber lid is urged toward the open position while the lock member is engaged with the cartridge chamber lid opening / closing mechanism, the lock member is pressed by the cartridge chamber lid opening / closing mechanism. Since the cam member is separated from the cam member, the movement of the cam member is not hindered, and the lock can be reliably released without damaging the lock mechanism.

[Brief description of the drawings]

FIG. 1 is an external perspective view illustrating a state where a camera embodying the present invention is not used.

FIG. 2 is an external perspective view showing a state of the camera when shooting.

FIG. 3 is an external perspective view illustrating a state when a cartridge of the camera is replaced.

FIG. 4 is an external perspective view of the camera body and the slide cover as viewed from the back side.

FIG. 5 is an explanatory diagram showing a state of a cartridge chamber lid with respect to a stop position of a slide cover.

FIG. 6 is an exploded perspective view showing a configuration of a film feeding mechanism and a safety lock mechanism.

FIG. 7 is an explanatory diagram showing a state of a light shielding cover with respect to a stop position of a slide cover.

FIG. 8 is an external perspective view illustrating a configuration of a use state display mechanism of the cartridge body.

FIG. 9 is a plan view showing a state of a film feeding mechanism and a safety lock mechanism when not in use and when a cartridge is not loaded.

FIG. 10 is a plan view showing a state of a delay mechanism at the time of film rewinding.

FIG. 11 is a plan view showing a state of a delay mechanism at the time of film winding.

FIG. 12 is a plan view showing a state of a film feeding mechanism and a safety lock mechanism when a cartridge is replaced and a cartridge is not loaded.

FIG. 13 is a plan view showing a state of a film feeding mechanism and a safety lock mechanism during use state detection and data reading processing.

FIG. 14 is a plan view showing a state of a film feeding mechanism and a safety lock mechanism at the time of safety lock.

FIG. 15 is a plan view showing a state of a film feeding mechanism and a safety lock mechanism at the time of film winding.

FIG. 16 is a front view showing the state of the light-shielding lid opening / closing mechanism when not in use.

FIG. 17 is a front view showing the state of the light-shielding cover opening / closing mechanism during photographing.

FIG. 18 is a front view showing the state of the light-shielding cover opening / closing mechanism when the cartridge is replaced.

FIG. 19 is a front view showing the state of the light-shielding lid opening / closing mechanism at the time of safety lock.

FIG. 20 is an explanatory diagram showing an operation state of a light-shielding lid open / close detection switch.

FIG. 21 is a block diagram showing an electrical configuration related to a film feeding mechanism and a safety lock mechanism.

FIG. 22 is a timing chart showing an operation state of each unit.

FIG. 23 is a flowchart of a use state detection and data reading process.

FIG. 24 is a flowchart of a film setting and winding process.

FIG. 25 is a flowchart of a film rewinding process.

FIG. 26 is a flowchart of a slide cover unlocking process.

FIG. 27 is an exploded perspective view showing another embodiment for preventing the release of the safety lock mechanism when the rotation direction of the feeding motor is switched.

[Explanation of symbols]

 2 Camera 3 Camera body 4 Slide cover 6 Cartridge chamber lid 7 Cartridge chamber 8 Film cartridge 30 Cartridge body 31 Photo film 33 Cam plate 52 Feeding motor 59 D5 gear 60 D6 gear 62 D7 gear 65 D8 gear 67 Friction plate 68 Lock release Sensor 71 Lock lever 80 Shield lid opening / closing member

 ──────────────────────────────────────────────────続 き Continuing on the front page (72) Inventor Takashi Kamoda 1-3324 Uetake-cho, Omiya-shi, Saitama, Fuji Photo Optical Machine Co., Ltd. (72) Inventor Haruo Onozuka 1-324, Uetake-cho, Omiya-shi, Saitama Fuji Photo Inside Koki Co., Ltd. (72) Noboru Shimada, Inventor No. 1-3324 Uetake-cho, Omiya City, Saitama Prefecture Fuji Photo Co., Ltd. F term in reference (reference) 2H020 AA09 BA01 BA02 BA04 2H100 AA61 DD04

Claims (11)

[Claims] 1. A cartridge chamber in which a film cartridge is loaded, a cartridge chamber lid for opening and closing the cartridge chamber, and a cartridge chamber lid for holding the cartridge chamber lid in a closed position and moving the cartridge chamber lid to an open position in response to an opening operation. In a camera having an opening / closing mechanism, a film feeding mechanism for winding and rewinding a photographic film, and a feeding motor serving as a driving source of the film feeding mechanism, the rotation direction of the feeding motor is After a certain amount of rotation after switching, a delay mechanism that delays the rotation of the feeding motor to the film feeding mechanism and transmits the same to the film feeding mechanism. Cartridge chamber lid that locks the cartridge chamber lid at the closed position by using the rotation of the feeding motor during the period when the feeding mechanism is not driven Camera, characterized in that a and click mechanism. 2. The cartridge chamber lid lock mechanism rotates a feed motor in a film winding direction after completion of film rewinding, and uses rotation of the feed motor during a period in which the film feed mechanism is not driven by the delay mechanism. 2. The camera according to claim 1, wherein the cartridge chamber lid is unlocked. 3. A cam member that moves between a winding lock position and a rewind lock position by rotation of a feeding motor during a period in which the film feeding mechanism is not driven by the delay mechanism. A lock member that is pressed by the cam member when the cam member is at the winding lock position and the rewind lock position to engage with the cartridge chamber lid opening / closing mechanism, and to prevent the cartridge chamber lid from moving to the open position. 2. The camera according to claim 1, comprising: 4. The camera according to claim 3, wherein the lock member releases the lock of the cartridge chamber lid by separating from the cartridge chamber lid opening / closing mechanism when the cam member is at the unlock position. 5. The camera according to claim 1, further comprising a lock release sensor for detecting lock release by said cartridge chamber lid lock mechanism. 6. The camera according to claim 5, wherein when a release signal is not detected after a lapse of a predetermined time from the start of rotation of the feeding motor, a release error process is performed. 7. A motor sensor for detecting rotation of the feed motor, and controlling a fixed amount of rotation of the feed motor in a film winding direction when unlocking the cartridge chamber lid. 7. The method according to claim 1, wherein
Camera according to any of the above. 8. The method according to claim 1, wherein when the rotation direction of the feed motor is switched, the rotation speed of the feed motor is increased only until the cartridge chamber lid is locked. Camera described. 9. A cartridge chamber in which a film cartridge is loaded, a cartridge chamber lid for opening and closing the cartridge chamber, a cartridge chamber lid for holding the cartridge chamber lid in a closed position and moving the cartridge chamber lid to an open position in response to an opening operation. An opening / closing mechanism, a film feeding mechanism for winding and rewinding the photographic film, a feeding motor serving as a driving source for the film feeding mechanism, A camera chamber lid locking mechanism that locks the cartridge chamber lid at the closed position by using the rotation of the feeding motor, wherein the cartridge chamber lid locking mechanism directs the cartridge chamber lid to the open position during the unlocking operation. Wherein the lock release operation is not hindered even when the camera is biased. 10. The cartridge chamber lid locking mechanism,
A cam member which moves between a winding lock position arranged at the time of film winding drive, a rewind lock position arranged at the time of film rewind driving, and an unlock position, and the cam member is a winding lock position and a rewind lock. When the cam member is in the unlock position, it is separated from the cartridge chamber lid opening / closing mechanism to allow the cartridge chamber lid to be opened. When the cartridge chamber lid is urged toward the open position during the unlocking operation, the lock member is pressed by the cartridge chamber lid opening / closing mechanism and is separated from the cam member, and the cartridge chamber lid lock is released. 10. The camera according to claim 9, wherein the operation of unlocking the mechanism is not hindered. 11. The cartridge chamber lid opening / closing mechanism includes at least a non-photographing position at which photographing is not performed;
It is movable between a photographing position at which photographing can be performed and a cartridge replacement position at which film cartridge can be replaced, and covers the cartridge chamber when in the non-photographing position and the photographing position to cover the cartridge chamber cover. The camera according to any one of claims 1 to 10, wherein the cover is a cover member that prevents opening and closing of the cover and exposes the cartridge chamber cover when the cartridge is at the cartridge replacement position so that the film cartridge can be replaced.