JPH07253618A - Camera - Google Patents

Abstract

PURPOSE:To prevent double exposure by detecting information on a kind of cartridge and inhibiting a photographing operation in accordance with the detection result. CONSTITUTION:When a rear cover is closed after the cartridge is loaded in a cartridge chamber, a magnetization electromagnet 4 constituting a recording device 52 and a magnet detecting element 5 constituting a discrimination circuit 50 are brought into contact with the information recording part of the cartridge. When it is detected by the magnet detecting element 5 that the information recording part of the cartridge is already magnetized, a signal showing the finish of using is outputted to a control circuit 51 by the cartridge discrimination circuit 50. A combination magnet 33 is instantaneously energized by the control circuit 51 and an armature is released from attracting as soon as the signal is inputted. When the armature is released from attracting, a push lever is rotated by the pressing force of a tension coil spring, then, the cartridge is pressed against the rear cover, the rear cover is automatically opened. And at the same time when the rear cover is opened, the cartridge is pushed outside the cartridge chamber, and a rear cover switch Sw1 and a pilot switch Sw2 are opened.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera using a cartridge or a film unit (patrone).

[0002]

2. Description of the Related Art Conventionally, a camera is known in which a film is pulled out from a cartridge for photographing and then rewound into the cartridge.

[0003]

However, in the above-mentioned camera, it is difficult to distinguish whether the loaded cartridge is a used cartridge containing a film that has already been photographed or an unused cartridge. However, there was a risk that the used cartridge would be reloaded into the camera and the picture taken.

The present invention solves the above-mentioned problems in a conventionally known camera, and it is possible to read out information relating to the cartridge from the cartridge, and by prohibiting the photographing operation based on the information, the duplication is prevented. It is an object to provide a camera that prevents exposure.

[0005]

In order to achieve the above object, in the present invention, a camera in which a cartridge can be loaded detects information indicating the type of the cartridge from the cartridge loaded in the camera. The information detecting means and the prohibiting means for prohibiting the photographing operation according to the information detected by the information detecting means.

Further, in the present invention, information detection for detecting information in the information recording section is carried out in a camera in which a film unit having a film, a container for storing the film, and an information recording section capable of recording information can be loaded. The means and the prohibiting means for prohibiting the photographing operation according to the information detected by the information detecting means.

[0007]

[Operation] According to the present invention, the information regarding the type of the cartridge is detected and the photographing operation is prohibited according to the detection result. Therefore, even if the cartridge which should not be photographed is loaded, the photographing is performed. There is nothing.

[0008]

Embodiments of the present invention will now be described in detail with reference to the accompanying drawings. FIG. 1 is a perspective view showing a schematic configuration of a first embodiment of the present invention, and FIG. 2 is a sectional view of a cartridge section with the camera back cover in FIG. 1 being closed. In FIG. 1, an information recording section 2A magnetized by magnetic induction is provided on the back surface of the film drawing opening (lip portion) of the cartridge 2 loaded in the cartridge chamber 1A of the camera body 1. As shown in FIG. 2, a magnetizing electromagnet 4 and a magnetic detecting element 5 such as a Hall effect element are arranged close to each other on the back surface of the back cover 3 facing the information recording section 2A. . The magnetizing electromagnet 4 constitutes an information recording means.

The back cover 3 is openably and closably supported by the camera body 1 by a hinge (not shown), protrudes from the inner surface of one end of the back cover 3, and is fixed to the camera body 1 and the back cover claw 6 for locking. A protrusion 7 for actuating the closed back cover switch Sw ₁ is provided. The back cover switch Sw ₁ is configured to be opened by the projection 7 when the back cover 3 is closed and to output a back cover signal at that time.

The locking member 10 provided with the hook portion 10a which can be engaged with the back cover claw 6 when the back cover 3 is closed, engages with the pins 11 and 12 fixed to the camera body 1, respectively. The locking member 10 has a pair of rectilinear grooves 10b, whereby the locking member 10 slides up and down between an ascending position where the hook 10a and the back cover claw 6 engage and a descending position where the engagement is released. It is configured to be movable, and is constantly urged by the tension coil spring 13 toward the raised position side (upward in FIG. 1).

Further, the lock member 10 is provided with a finger hook 14 for moving the lock member 10 to the lowered position against the urging force of the tension coil spring 13, and one of the lock members 10 is provided. On the side surface, a locked stepped portion 10c that engages with a locking lever 15 described below, a slope 10d, a slope 10e that engages with a second engagement pin 23 described below, and a flat portion 10f are formed.

A locking lever 15 for locking the locking member 10 in its lowered position against the urging force of the tension coil spring 13 is rotatably supported by a support shaft 16 fixed to the camera body 1. The tension coil spring 17 constantly urges the spring clockwise. In addition, the locking lever 15 is used for the lock member 1.
Hook 15a and arm 15b engaging with the locked stepped portion 10c
And an arm portion 15b thereof is configured to be engageable with a first engagement pin 21A projecting from the release lever 20.

A release lever 20 for releasing the locking of the locking lever 15 is rotatably supported coaxially by a support shaft 16 supporting the locking lever, and a tension coil spring 22 is provided.
Is always urged counterclockwise. The release lever 20 rotates counterclockwise to move the first engagement pin 21A.
Is brought into contact with the arm 15b of the locking lever 15 to release the locking of the locking lever 15 and to rotate clockwise to separate the first engaging pin 21A from the arm 15b. It is rotatable with respect to the second position. Release lever 2
The second engagement pin 21B protruding from the lower end portion 20a of
When the lock member 10 is displaced from the lowered position to the raised position by the biasing force of the tension coil spring 13, the lock member 10 can be engaged with the slope 10e and the flat portion 10f of the lock member 10.

An armature 24 attracted to a first combination magnet 23 fixed to the camera body 1 is provided at the upper end of the release lever 20. This first
The combination magnet 23 normally attracts the armature 24 by the magnetic force of a permanent magnet, but magnetism is detected from the information recording unit 2A of the cartridge 2 from the cartridge determination circuit 50 (see FIG. 3) including the magnetic detection element 5. When the coil is energized through the control circuit 51 by a signal indicating that the patrone 2 is new, that is, a signal that the cartridge 2 is new, the magnetic force of the permanent magnet is canceled (that is, the OFF type). . The urging force of the tension coil spring 22 for urging the release lever 20 is stronger than the urging force of the tension coil spring 17 for urging the locking lever 15, and the urging force of the tension coil spring 13 for urging the locking member 10. The force of the tension coil spring 22 is stronger than that of the tension coil spring 22.

On the other hand, the push-out lever 30 having at one end a pressing portion 30a protruding into the cartridge chamber 1A of the camera body 1 for accommodating the cartridge 2 is rotatably supported by a support shaft 31 embedded in the camera body 1. , Patrone 2
When not loaded, the strong tension coil spring 32 constantly urges the pressing portion 30a in the clockwise direction so as to project into the chamber. Further, the cartridge switch Sw ₂ fixedly mounted on the camera body 1 is opened when the pressing portion 30 a is displaced against the biasing force of the tension coil spring 32 due to the loading of the cartridge 2, and the loading of the cartridge 2 at this time. It is configured to output a signal. Further, the other end of the pushing lever is provided with an armature 34 which is attracted to the OFF type second combination magnet 33 fixedly mounted on the camera body 1. The second combination magnet 33 is turned off when the magnetic detection element 5 detects a cartridge (that is, a used cartridge) in which the magnetic recording unit 2A has already been magnetized.
Therefore, the suction of the armature 34 is stopped.

FIG. 3 is a block diagram for explaining the electric system of the first embodiment. In FIG. 3, the film rewinding device 53 has a known film end detecting device (not shown), and outputs a completion signal to the control circuit 51 when the rewinding is completed with the film leader section left. Is configured. 4 and 5 are explanatory views of the operation of the back cover locking portion. FIG. 4 shows a state in which the back cover is locked, and FIG. 5 shows a state in which the lock is released. ing. The operation of the above embodiment will be described below with reference to FIGS.

FIG. 4 shows the state immediately after the rewinding is completed, the locking member 10 is in the raised position, and the back cover claw 6 is in the locking member 10.
It is locked by the hook portion 10a. Further, the back cover switch Sw ₁ is placed in the open state by the protrusion 7 of the back cover 3, and the back cover signal indicating that the back cover 3 is closed is sent to the control circuit 51 in FIG. Further, the second engagement pin 21B of the release lever 20 engages with the flat portion 10f of the locking member 10, and the armature 24 provided on the release lever 20 is attracted to the first combination magnet 23.

On the other hand, in the state immediately after the completion of the rewinding shown in FIG. 4, the pressing portion 30a of the pushing lever 30 in FIG.
Is being pressed through the cartridge, the cartridge switch Sw ₂ is in the open state, and the cartridge signal indicating that the cartridge 2 is loaded is transmitted to the control circuit 51.
Has been entered in. The armature 34 provided on the pushing lever 30 is attracted by the second combination magnet 33.

In FIG. 4, the finger hook 14 of the locking member 10 is shown.
Is pushed downward, the locking member 10 moves the tension coil spring 13
Falls against the urging force of. As a result, the locking lever 1
The hook portion 15a of No. 5 rides on the slope 10d of the locking member 10 against the biasing force of the tension coil spring 17, and the locking member 10
5 reaches the lowered position shown in FIG. 5, the locking lever 15 is rotated clockwise in FIG. 5 by the urging force of the tension coil spring 17 to lock the locked stepped portion 10c of the locking member 10. . Therefore, even if the finger is removed from the finger rest 14, the locking member 10
It is held in the lowered position. At the same time, the hook 10a of the locking member 10 and the back cover claw 6 are disengaged, the back cover 3 is unlocked, and the back cover 3 can be opened.

On the other hand, the flat portion 10f of the locking member 10 moves downward and separates from the second engagement pin 21B of the release lever 20 as shown in FIG. However, since the armature 24 is attracted to the first combination magnet 23, it is held stationary. When the back cover 3 is opened, the projection 7 separates from the back cover switch Sw ₁ , so that the back cover switch Sw ₁ is closed, and the back cover signal indicating that the back cover 3 is closed disappears. Due to the disappearance of the back cover signal, the control device 51 energizes the second combination magnet 33 for a moment to release the attraction of the armature 34. Therefore, the push-out lever 30 is rotated clockwise in FIG. 1 by the urging force of the tension coil spring 32 to push out the cartridge 2 and at the same time open the cartridge switch Sw ₂ . By closing this Patrone switch Sw ₂ ,
The Patrone signal indicating that the Patrone 2 is loaded disappears.

When the cartridge 2 is loaded into the cartridge chamber and the back cover 3 is closed, the cartridge 2 is pushed by the cover lid 3, and the pressing portion 30a of the push-out lever 30 projecting into the inside of the cartridge chamber is pushed by the cartridge 2. Then, the push-out lever 30 is pulled in from the cartridge chamber, and accordingly, the push-out lever 30 is rotated counterclockwise. At that time, the magnetizing electromagnet 5 constituting the recording device 52 and the magnetic detection element 5 constituting the detecting device 50 are in contact with the information recording portion 2a of the cartridge 2 as shown in FIG. Further, the patrone switch Sw ₂ is opened by the displacement of the pressing portion 30a, and a patrone signal indicating that the patrone 2 has been loaded is output to the control circuit 51. Further, since the pressing lever 30 rotates counterclockwise against the biasing force of the tension coil spring 32, the armature 2
4 is attracted to the permanent magnet of the second combination magnet 33.

On the other hand, when the back cover 3 is closed, the back cover claw 6
Is displaced to a position at which it can be engaged with the hook portion 10a of the locking member 10, as shown by a chain double-dashed line A in FIG. Further, the projection 7 is displaced to the position shown by the chain double-dashed line B in FIG. 5 to open the back cover switch Sw ₁ . As a result, the back cover switch Sw ₁ outputs a back cover signal indicating that the back cover 3 is closed to the control circuit 51.

The control circuit 51, which receives the output signals of the back cover switch Sw ₁ and the cartridge switch Sw ₂ , sends a control signal to the cartridge determination device 50, and the magnetic detection element 5 responds to the signal by the magnetic detection element 5. Information recording section 2A
Is magnetized, that is, whether the cartridge 2 is used or not is determined, and the result is sent to the control circuit 51. Hereinafter, the operation will be roughly divided into cases where the cartridge 2 is used and cases where it is not used. A. In the case of a used cartridge (1) The magnetic detection element 5 is the information recording section 2 of the cartridge 2.
When detecting that A is already magnetized, the cartridge determination circuit 50 outputs a used signal to the control circuit 51.

(2) The control circuit 51 receives the used signal and immediately outputs the second combination magnet 3
3 is energized for a moment to release the adsorption of the armature 34. (3) When the attraction of the armature 33 is released, the pushing lever 30 is rotated clockwise by the urging force of the tension coil spring 32 to push the cartridge 2 toward the back cover 3.

(4) Since the back cover 3 is unlocked, the back cover 3 is automatically opened when the cartridge 2 is pushed. (5) Simultaneously with the opening of the back cover 3, the cartridge 2 is pushed out of the cartridge chamber 1A, and the back cover switch Sw ₁ and the cartridge switch Sw ₂ are closed. B. In the case of unused cartridge (1) The magnetic detection element 5 is the information recording section 2A of the cartridge 2.
When it is detected that there is no magnetism, the Patrone discrimination circuit 5
0 outputs the Patrone unused signal to the control circuit 51.

(2) The control circuit 51 receives the unused signal and immediately outputs the first combination magnet 2
Energize 3 for a moment. (3) When the first combination magnet 23 is turned off by the energization, the attraction of the armature 24 is released, and the release lever 20 is rotated counterclockwise by the urging force of the tension coil spring 22 to the release position.

(4) By the rotation of the release lever 20,
Since the first engagement pin 21A pushes down the arm portion 15b of the locking lever 15, the locking lever 15 moves the tension coil spring 17
It rotates counterclockwise as shown by a chain line C in FIG. (5) By this rotation, the hook portion 15a of the locking lever 15 is disengaged from the locked stepped portion 10c of the locking member 10, and the locking member 1
The lock at the 0 lowered position is released.

(6) By releasing the locking of the locking lever 15,
The locking member 10 moves up from the lowered position shown in FIG. 5 to the raised position shown in FIG. 4 by the biasing force of the tension coil spring 13. (6) While the lock member 10 is being raised, the lock member 10
The slanted surface 10e contacts the second engagement pin 21B of the release lever 20 located at the release position shown by the chain line D in FIG. 3, pushes it away, and rotates the release lever 20 clockwise. Return to the position shown in 4.

(7) When the locking member 10 is further raised to the raised position shown in FIG. 4, the pins 11 and 12 are moved straight in the groove 10b.
Abut the lower end of. (8) When the lock member 10 reaches the raised position, the second engagement pin 23 rides on the flat portion 10f of the lock member 10, and the release lever 20 causes the armature 24 to contact and attract the armature 24 to the first combination magnet 23. It is held in the position of FIG.

(9) On the other hand, when the locking member 10 is raised,
The hook portion 10a engages with the back cover claw 6, whereby the back cover 3 is locked in the closed position as shown in FIG. (10) When the shooting of the film in the cartridge 2 is completed, the control circuit 51 sends a signal to the film rewinding device 53 to rewind the film. When the rewinding of the film is completed, the control circuit 51 causes the film rewinding device 53.
Input the rewinding completion signal output by.

(11) Upon receipt of the rewinding completion signal from the film rewinding device 53, the control circuit 51 sends the signal to the recording device 52 to momentarily magnetize the magnetizing electromagnet. As a result, the information recording section 2A of the cartridge 2 is magnetized, and the used signal of the cartridge 2 is recorded. (12) Next, when the finger hook 14 of the lock member 10 in the raised position (FIG. 4) is pushed up and the lock member 10 is lowered to the lowered position shown in FIG. 5, the hook portion 10a and the back cover claw 6 are removed. Is disengaged and the back cover 3 is unlocked.

(13) On the other hand, while the lock member 10 is descending, the inclined portion 10d of the lock member 10 contacts the hook portion 15a of the locking lever 15 and resists the biasing force of the tension coil spring 17. Rotate the locking lever 15 counterclockwise to move the hook 15a.
When the vehicle crosses the inclined portion 10d, the hook portion 15a engages with the locked step portion 10c of the locking member 10 and holds the locking member 10 in the lowered position.

(14) When the back cover 3 is opened, the protrusion 7 closes the back cover switch Sw ₁ . (15) By the closing signal of the back cover switch Sw ₁ , the control circuit 51 energizes the second combination magnet 33 for a moment and releases the attraction of the armature 34. (16) By releasing the attraction of the armature 34, the pushing lever 30 is rotated clockwise by the urging force of the tension coil spring 32 to push the cartridge 2 toward the back cover 3. (17)
By pressing the push lever 30, the cartridge 2 is pushed out of the cartridge chamber 1A, and at the same time, the back cover switch S
w ₁ is closed.

In the first embodiment, the used information is recorded in association with the film rewinding completion operation, but the present invention is not limited to this, and the film rewinding to rewinding operation is not limited to this. Until the completion, for example, the used information of the cartridge may be recorded at an appropriate control signal transmission timing such as when the film is completely fed, when the winding is completed, and when the rewinding is started.

In the above-mentioned first embodiment, an unused cartridge discriminating camera in which used information is attached to the cartridge by magnetic recording is shown. However, the used information is recorded by physical deformation such as scratches, It may be configured to detect the presence or absence of the recording. Next, an unused cartridge discriminating camera which records used information by physical deformation is shown. FIG. 6 is a perspective view showing a state where the back cover is opened in the unused cartridge discriminating camera according to the second embodiment of the present invention.
FIG. 3 is a partially cutaway side view showing a schematic configuration of a used information recording unit.

In FIG. 6, the back cover 103 facing the film outlet flat portion 102a of the cartridge 102 loaded in the cartridge chamber 101A of the camera body 101 includes:
An indenter 104 having a sharp tip for recording used information on the cartridge 2 and a detector 105 for detecting the recorded information are supported and slidable along the back surface of the back cover 103. A moving plate 106 is provided. This sliding plate 1
As shown in FIG. 7, reference numeral 06 holds a locking plate 108 having a back cover claw 107, and is slidably supported on a holding plate 109 fixedly provided on the back surface of the back cover 103.
It is always urged to the right in FIG. 7 at 10. A finger hook 112 is integrally formed on the sliding plate 106 by penetrating an escape hole 111 formed in the back cover 103 and the holding plate 109.

The lock plate 108 has two guide grooves 114 with which two guide pins 113 planted in the holding plate 109 are respectively engaged, and a tension coil spring 115 is provided to keep the lock plate 108 right in FIG. It is being biased toward. Further, the two back cover claws 107 provided on the locking plate 108 are configured to engage with the fixed hooks 116 fixed to the camera body 1 side when the back cover 103 is closed. . Further, the lock plate 108
7, a protruding arm 118 that is engageable with the sliding plate 106 is provided at the left end portion through the escape hole 117 provided in the holding plate 109, and the sliding plate 106 moves to the left. The engaging protrusion 106a provided on the left end of the sliding plate 106 is configured to come into contact with the sliding plate 106 when it is moved. Further, the moving amount a of the sliding plate 106 to the left in FIG. 7 is determined by the indenter 104 and the detector 10.
5 is greater than the distance b between the locking plate 108 and the distance C between the protruding arm 118 of the locking plate 108 and the engaging protrusion 106a of the sliding plate 106. It is configured to be slightly larger than d.

FIG. 8 is a schematic block diagram of a photoelectric detector showing an example of the detector 105. The light source 105a to the lens 105b are shown.
The plane portion 102a of the cartridge 102 is illuminated by a parallel light beam emitted through the lens, the reflected light is condensed through the lens 105c, received by the photoelectric conversion element 105d such as a position sensor (CCd), and recorded by the indenter 104. It is configured to detect the presence or absence of the formed straight line mark (scratch mark) m. With this photoelectric detector 105, the cartridge 1
As shown in FIG. 6, when the straight line mark m is recorded on the plane portion 102a of 02, the straight line mark m is provided at a predetermined position of the camera body 1 shown in FIG. The release button 120 is configured to be release locked.

In FIG. 9, the lock lever 121 is constantly biased by a tension coil spring 122 so as to be displaceable in the clockwise direction, and one end of the lock lever 121 is provided with a release lock magnet 1.
An armature 124 to be sucked by 23 is provided.
In addition, the magnet 123 is supplied with power and the armature 124
Is sucked, the lock lever 121 rotates counterclockwise against the urging force of the tension coil spring 122, and the other end 12
By inserting 1a into the locking groove 120a of the release button 120, the release button 120 is prevented from being pressed.

FIG. 10 is an electric system diagram of the second embodiment. The back cover switch Sw ₁ is a normally closed switch which is turned off when the back cover 103 is closed, as in the first embodiment shown in FIG.
Similarly to the first embodiment, the cartridge switch Sw ₂ also becomes OF when the cartridge 102 is loaded into the cartridge chamber 101A.
It is a normally closed switch that is F. FIG. 11 shows the Patrone 1
FIG. 12 is a sectional view showing a state immediately after the back lid 103 is closed after loading 02, and FIG. 12 is a flow chart for explaining the operation of the second embodiment. The operation of the second embodiment shown in FIG. 6 will be described below with reference to the flow chart of FIG.

Whether or not the cartridge 102 has been used, the cartridge 102 is installed in the camera chamber 1 of the camera body 1.
When the back cover 103 is closed after loading it into 01A (step S1), the inclined surface of the back cover claw 107 is fixed to the fixed hook 1 on the camera body 1 side.
Since it abuts against 16, the locking plate 108 is displaced leftward in FIG. 7 against the biasing force of the tension coil spring 115. When the tip of the back cover claw 107 further rides on the inclined portion of the fixed hook 116, the back cover claw 107 is locked by the fixed hook 116, and the locking plate 108 moves to the right by the biasing force of the tension coil spring 115. , Returns to the original position and lock is completed (step S2). Further, in the meantime, the back cover switch Sw ₁ and the cartridge switch Sw ₂ are both opened, and the back cover signal and the cartridge signal are sent to the control circuit 151. Also, the back cover 1
When 03 is opened, the flat portion 102 of the cartridge 102 is
As shown in FIG. 11, the tip of the indenter 104 is pushed into a, and a minute indentation is provided. In this case, finger rest 11
2 is displaced to the left in FIG. 7 to move the indenter 104 to the sliding plate 10.
6 is not moved to the left against the urging force of the tension coil spring 110, the cartridge 102 as shown in FIG.
The straight line mark m (used information) that is long in the axial direction of is not recorded.

After receiving both the back cover signal and the patrone signal from both switches Sw ₁ and Sw ₂ , and after a predetermined time (time until completion of locking) has passed, the control circuit 151
The output signal is sent to the Patrone discrimination circuit 150, and the detector 1
05 to detect the presence or absence of the straight line mark m (step S
3). The Patrone discriminating circuit 150 lights up the light source 115a of the detector 105 and illuminates the plane portion 102a with a parallel light flux as shown in FIG. 8, and receives the reflected light with a photoelectric conversion element 115d such as CCd. The presence or absence of the mark m is detected from the output signal to determine whether or not the cartridge has been used.

When the used mark m is not attached to the cartridge, that is, when the unused cartridge is loaded, the cartridge determination circuit 150 outputs an unused cartridge signal to the control circuit 151. When the control circuit 151 inputs the signal, the control circuit 151 determines whether or not the release button 120 is in the release lock state, and when it is in the release lock state, releases it and permits the release by the release button 120 (step S4). . Then, when the release button is first pressed, the film is idly fed (step S5), and each time the release button is pressed, photographing is performed (step S6). When the photographing of all the films in the cartridge 102 is completed, the control circuit 151 sends a rewinding signal to the automatic rewinding and rewinding device 152, and rewinds all the films, leaving the leader portion of the film (step S7).

When the rewinding of the film is completed, the finger rest 1
12 is moved to the left in FIG. When the sliding plate 106 moves to the left by a displacement amount C against the biasing force of the tension coil spring 110 together with the finger rest 112, the engaging protrusion 106 a of the sliding plate 106 abuts the protruding arm 118 of the locking plate 108. When the sliding plate 106 further moves to the left by the displacement amount d, the engagement between the back cover claw 117 and the fixed hook 116 is released, and the lock of the back cover is released. Further, together with the sliding plate 106, the indenter 10
4 moves to the left by the displacement amount a, the cartridge 102
A straight line mark (scratch mark) of length a on the flat surface portion 102a of
m is added as shown by the chain line in FIG. 11 (step S8).

Next, with the finger rest 112 moved leftward by the displacement amount a (that is, in the unlocked state), the back cover 11 is released.
When 3 is opened (step S9), the cartridge 102 marked with the straight line mark m can be taken out from the cartridge chamber 101A (step S10). On the other hand, when the straight line mark m is detected in step S3, the cartridge determination circuit 150 sends the used cartridge signal to the control circuit 151. Control circuit 151 receiving this output signal
Immediately energizes the release lock magnet 123 and attracts the armature 124 to rotate the lock lever 122 counterclockwise to release the release button 120.
To disable the release (step S1
1). Therefore, as in step S8, as shown in FIG.
It moves to the left inside and unlocks the back cover 103 (step S12). However, in this step S12, since the straight line mark m has already been added, the indenter 104
Moves only on the straight line mark m, and the mark m is not doubled.

When the finger rest 112 moves to the left in FIG. 11, the detector 105 provided on the sliding plate 106 moves the indenter 10
Displaces a to the left with 4. Therefore, since the detector 105 is placed at a position further leftward from the used mark m by b, the linear mark m is not detected at that position. Therefore, the cartridge determination circuit 150 sends an unused cartridge signal to the control circuit 151, and the control circuit 151 that has received the signal inputs the release lock magnet 12 to the control circuit 151.
The power supply to 3 is stopped and the release lock is released (step 13).

When the release lock is released, the process proceeds to step S9, and the back cover is opened (step S9) and the cartridge is taken out (step S10). After step S8, when the finger rest 112 is released without opening the back cover 113, the detector 105 causes the sliding plate 10 to move.
6 and 6 automatically returns to the original position on the right side (FIG. 11) by the urging force of the tension coil spring 110. In this case, since the used mark m already given is detected, the process proceeds to step S11 and the release lock is performed.

In the second embodiment described above, it is possible to prevent double shooting of the cartridge with a relatively simple structure. Note that if the cartridge is taken out after the unused cartridge has been loaded and the back cover has been closed, but the shooting has not yet started, the used mark m is attached to the cartridge. In such a case, the used mark m may be coated with paint or the like.

Although FIG. 9 shows the release prohibiting means for mechanically blocking the release, the control circuit 151
A means for electrically prohibiting the release may be provided so that the release cannot be performed even if the release button is pressed. The above-described embodiments shown in FIGS. 1 and 6 are examples in which the present invention is applied to a camera of a type in which the cartridge is loaded from a direction perpendicular to the film surface, but the cartridge is moved in the axial direction of the rewinding shaft. FIG. 13 shows an embodiment of the present invention applied to a so-called drop-in loading camera, which is loaded in the same manner.

FIG. 13 is a perspective view of the third embodiment of the present invention showing a state in which the camera body is turned upside down and a cartridge is loaded. FIG. 14 shows a state in which the cartridge is completely loaded and the case back is closed. FIG. 15 is a cross-sectional view of the cartridge chamber portion, and FIG. 15 is a cross-sectional view of the cartridge chamber portion when the cartridge is taken out. In FIG. 13, at the bottom of the camera body 201,
A cartridge chamber 201A into which the cartridge 202 can be inserted in the axial direction (direction of arrow Y) and an insertion opening 201B of the film leader portion F are provided, and the back cover 203 is provided so as to be openable and closable so as to also cover the bottom portion thereof. There is. Back cover switch S
w ₁ is a normally-closed switch, which is configured to be opened by the closing operation of the back cover 203. As shown in FIG. 14, the cartridge 202 is a cartridge room 201A.
A semi-cylindrical holder body 204 that is axially movable inside
It is housed in a cartridge holder that is composed of a locking member 205 and a locking member 205.

As shown in FIG. 15, a locking member 205 rotatable about a pin shaft 205A is provided at one end of the holder main body 204, and the cartridge 202 is inserted into the locking member 205 in FIG. When it is rotated counterclockwise, the hook portion 205B at the tip of the patrone 202 as shown in FIG.
Is configured to lock the right edge of the. Locking member 2
05 is provided with a normally-closed cartridge switch Sw ₂ , and when the locking member 205 locks the cartridge 202, it engages with the cylindrical surface of the cartridge 202 and is in the open state. Further, the locking member 205 and the cartridge holder 204
A click device including a click spring 206 and a click ball 207 is provided at the connecting portion with the locking member 205.
Is rotated counterclockwise from the release position shown in FIG.
It is configured to be held in the locking position shown in FIG.

At the bottom of the holder body 204, the motor M
Projection 2 that is screwed with a feed screw 207 driven by
04A is provided, so that the holder body 204 is
It can move in the axial direction according to the rotation of the feed screw 207. In addition, the protruding portion 204A is formed by the holder main body 204.
14 moves to the left end position of the cartridge chamber 201A as shown in FIG. 14, engages with the first limit switch Sw ₃ to open it, and moves to the right end position as shown in FIG. 5 to move to the second limit switch Sw. It is configured to engage ₄ to open it.

The cartridge 202 has an information recording portion 202A magnetized by magnetic induction as shown in FIG. 13 at the film outlet, and a magnetic head 210 contactable with the information recording portion 202A is provided at one end of a leaf spring 211. It is fixed. The other end of the leaf spring 211 is fixed to one arm 212a of the lever 212. The lever 212 is rotatably supported by a pin shaft 213 planted in a fixed portion of the camera body 201, and is always counterclockwise by a tension coil spring 214 (the magnetic head 210 serves as an information recording portion 202).
It is urged in the direction away from A). Further lever 2
An armature 215 is provided on the other arm of 12,
When the armature 215 is attracted to the electromagnet Mg against the biasing force of the tension coil spring 214, the magnetic head 210
Is the magnetic recording unit 202 of the cartridge 202 as shown in FIG.
It is configured to contact A.

FIG. 16 is a block diagram showing an electric system in the third embodiment. The information recording circuit 252A and the information detection circuit 252B which commonly include a motor circuit 251 for controlling the motor M for moving the cartridge and the magnetic head 210. And a magnet control circuit 253 for controlling an electromagnet Mg that displaces the recording head 252 and the magnetic head 210.
Etc. are controlled by a central processing unit CPU (hereinafter simply referred to as "CPU"). Further, the automatic film winding / rewinding device 254 provided on the camera body 201 and the display device 255 for displaying the number of frames to be photographed are also CPUs.
The CPU inputs signals from the film movement detection device 256 and the film end detection device 257 for detecting the film winding end and film rewinding end. Switch Sw ₅ can be used even before the shooting of all films is completed.
A rewinding switch that can rewind the film arbitrarily, and is closed by pressing a rewinding permission button 267, and rewinding is performed. The film movement detection device 2
Reference numeral 56 includes a sprocket wheel that meshes with the perforation of the film, and a detector that detects the rotation of the sprocket wheel, and continues to output a pulse signal according to the movement of the film, and stops the transmission of the pulse signal when the film stops. Is configured. Therefore, C
The PU judges that the entire winding of the film is completed by stopping the output of the detection signal, and controls the rewinding. Further, the film edge detection device is provided with a pin that interlocks with the switch so as to project in the film path, and detects the position of the pin that projects into the film path when the film edge passes,
A known device for detecting the film edge is configured so that the CPU stops the rewinding operation by inputting the detection signal.

FIGS. 17 to 19 show a device of the cartridge 202.
In the flow chart for explaining the operation from filling to taking out
is there. The third embodiment will be described below with reference to FIGS. 17 to 19.
The operation of the example will be described. As shown in FIG.
In the open state, the back cover switch Sw₁Is closed
It Further, the holder main body 204 is, as shown in FIG.
At the right end of the Patrone room 201A,
Itch Sw₂Is also closed. Furthermore, the first
Limit switch Sw₃Closed and the second limit switch
Switch Sw _FourHas been opened. Furthermore, the electromagnet Mg
Has released the attraction of armature 215,
The pad 210 is the information recording unit 202A of the cartridge 202.
It is placed in a contact release position away from.

In the above state, the cartridge 202 is inserted into the holder main body 204 of the cartridge chamber 201A as shown in FIG.
Is inserted into the film insertion opening 201B. Next, the locking member 205 is rotated counterclockwise to engage the hook portion 205B with the right end edge of the cartridge 202 to fix the cartridge 202 to the holder body 204. At that time, the cartridge switch Sw ₂ comes into contact with the cylindrical portion of the cartridge 202 and is opened. The locking member 205 is prevented from returning in the clockwise direction by the click stop device (206, 207).

The opening signal of the cartridge switch Sw ₂ is sent to the CPU shown in FIG. 16, and the operation of the CPU is started. Upon receiving the opening signal from the cartridge switch Sw _2, the CPU immediately receives the motor control circuit 2
A control signal is sent to 51 to drive the motor M. In accordance with the rotation of the feed screw 207 driven by the motor M, the holder body 204 moves to the left in FIG.
02 is started to be sent (step S101). As soon as the feeding of the Patrone 202 is started, the second
Limit switch Sw ₄ is closed, CPU based on the signal of the Sw ₄ sends a signal to the magnet control circuit 253, energizing the electromagnet Mg. As a result, the armature 215 is attracted to the electromagnet Mg, so that the lever 21
2 rotates clockwise against the biasing force of the tension coil spring 214 to bring the magnetic head 210 into contact with the surface of the information recording unit 202A of the cartridge 202 (step S10).
2). At this time, the magnetic force of the magnetic head 210 is brought into contact with the information recording portion 202A with an appropriate light pressure due to the elastic force of the leaf spring 211.

On the other hand, the CPU controls the magnet control circuit 25.
3 to the information recording / detecting device 252, the holder body 204 and the cartridge 20 are immediately transmitted.
While 2 is being sent, it is detected whether or not a magnetic recording such as a used signal or the number of photographed frames has already been made in the information recording section (step S103). Also, the result is CP
It is stored in U.

When the holder body 204 is fed to the left end position as shown in FIG. 14, the first limit switch Sw ₃ is opened, and the CPU controls the motor control circuit based on the signal from the first limit switch Sw _3. A signal is sent to 251 to stop the motor M, and the feeding of the cartridge is completed (step S104). In addition, the CPU immediately sends a motor stop signal to the motor control circuit 251,
A signal is sent to the magnet control circuit 253 to stop the power supply to the electromagnet Mg. As a result, the armature 215 is released from the attraction of the electromagnet Mg, and the lever 212 is rotated counterclockwise by the urging force of the tension coil spring 214,
The contact with the information recording unit 202A of the magnetic head 210 is released (step S105).

Next, the back cover 203 is closed (step S10).
6) Then, the back cover switch Sw ₁ is opened, and the back cover signal is sent to the CPU. Here, the CPU determines whether or not the mounted cartridge 202 is an unused one, based on the detection signal stored and stored in step S103 (step S107). Here, when the used signal or the photographed frame signal is not recorded in the information recording unit 202A, that is, when the signal is not detected, the patrone 202 is determined to be unused.

In step S107, step S1
When it is determined from the detection information in 03 that the cartridge is an unused product, the CPU sends a signal to the automatic winding / rewinding device 254 to feed the film by a predetermined amount, and then temporarily stops the film winding (step S108), and waits until the release button is pressed. Next, it is determined whether or not the release button is pressed (step S109), and when the release button is pressed, a predetermined shooting process is performed (step S110). When the shooting process ends, the CP continues.
Film winding is started in response to a command from U (step S111). Immediately after the film winding is started, it is judged whether or not the film has been fed by one frame based on the output signal from the film movement detection device 256 (step S112). The number of photographed frames is displayed on the device 255 (step S113),
Stop the film winding (step S114),
The process returns to step S109 and waits until the next release operation is performed.

If it is determined in step S112 that the film has not reached one frame, the film may be wound for one frame, or the entire number of frames of the film may have been wound, and further film winding may be impossible. That is the case. Therefore, in the next step, it is judged from the signal from the film movement detecting device 256 whether or not the feeding of all the frames of the film is completed (step S115). When the number of frames to be photographed remains, step S112 is performed. When it is determined that the winding of all frames has been completed, the winding operation is stopped (step S116), and the CPU immediately memorizes that all the frames have been used (step S117). .

On the other hand, in step S109, before the release button is pressed, it is judged whether or not the film is rewound midway before the shooting of all frames is completed, that is, it is judged whether or not the rewind button is pressed. If it is not rewound in the middle, the process returns to step S109 and waits until the release button is pressed. When rewinding, the number of shooting frames displayed on the display device 255 at that time is displayed. CPU
Is stored in the memory (step S119).

Step S117 or step S119
When the memory is completed in, the CPU commands the automatic winding / rewinding device 254 to rewind the film (step S120). The rewinding operation is continued until a signal is output from the film edge detector 257, that is, until the rewinding is completed (step S121). Step S1
When the case back is opened after the rewinding is completed in step 21, the case back switch Sw ₁ is closed accordingly (step S12).
2), depending on the closing of the back cover switch Sw ₁ , the electromagnet Mg
Is energized to bring the magnetic head 201 into contact with the information recording section 202A of the cartridge (step S123).

Subsequent to the energization of the electromagnet Mg, the motor M is further driven to start the feeding of the cartridge (moving to the right in FIG. 14) together with the holder body 204 (step 124). When the feeding of the patrone is started, the first limit switch Sw ₃ is closed, and depending on whether the switch Sw ₃ is closed, the number of all used frames or the number of photographed frames stored in steps S117 and S119 may be determined. The used information is recorded in the information recording unit 202A by the magnetic head 210 while the cartridge 202 is moving (step S125).

Further, the cartridge 202 is sent out together with the holder main body 204, and the second limit switch Sw ₄
Is opened, the motor M stops driving, and the feeding of the cartridge is completed (step S126). The second
In response to the opening of the limit switch SW ₄ , the electromagnet M is restarted.
g is energized, the armature 215 is attracted against the urging force of the tension coil spring 214, the magnetic head 210 is separated from the information recording unit 202A, and the contact is released (step S127). Next, the locking member 205 is rotated clockwise against the urging force of the click spring 206 to release the engagement between the right end edge of the cartridge 202 and the hook 205B.
The cartridge 202 is taken out of the cartridge chamber 201A (step S128). Patrone switch Sw ₂
Is closed according to the clockwise rotation of the locking member 205,
A series of operations from loading the cartridge to taking it out is completed.

On the other hand, if it is determined in step S107 that the loaded cartridge is not an unused one, whether the cartridge has been photographed (used) according to the information already recorded in the information recording section 202A. It is judged whether the product is a semi-used product that has been rewound on the way (step S12).
9) In the case of half use, based on the information on the number of photographed frames recorded in the information recording unit 202A, re-feeding by one frame more than the number of frames is performed (step S130), and step S1
Move to 09.

When it is determined in step S129 that all frames have been photographed (used), the display device 255 first flashes the back cover opening symbol to prompt the back cover 203 (step S131). It waits until the opening of 203 (step S132). Step S132
If the back cover 203 is opened at, the electromagnet Mg
_First , the motor M is driven in response to the opening of the back cover step Sw ₁ without energization, and the feeding of the cartridge 202 is started. (Step S133). Further, in this case, the sending is continued without re-recording the used information in the information recording unit 202A, and the second limit switch Sw ₄
The motor M is stopped and the feeding of the patrone is completed (step S134), and the process proceeds to the switch S128 for taking out the patrone.

Incidentally, in FIG. 15, the cartridge 202
When the Patrone switch Sw ₂ is pushed open with a finger after the removal, the motor M drives the holder body 2 to open.
04 is sent to the left, the back cover 203 can be opened as shown in FIG. 14, and when the Patrone switch Sw ₂ is pressed again, the motor M reverses and sends the holder main body 204 to the right, and the holder main body 204 of the Patrone 202. Can be installed.

Information recording unit 2 of the cartridge of this embodiment
Although information for identifying whether all the frames have been used, half-used, or not has been recorded in 02A, other identification information may be recorded. Examples are listed below. (1) Sensitized shooting information indicating that shooting was performed by setting a sensitivity other than the film-specific sensitivity.

(2) Date information indicating when the cartridge is loaded into the camera or taken out of the camera. (3) Identification information indicating a photographer or the like. (4) Japanese Laid-Open Patent Publication No. 54-26721, which records the information indicating the trimming range (range to be printed) outside the frame of the frame for which trimming is desired so that the trimming can be automatically performed during development. US Patent 46
There are cameras such as those disclosed in Japanese Patent Nos. 78299 and 4678300. Trimming information indicating whether or not there is a frame in which a trimming range is recorded in the case of this camera, and which frame at that time.

In the case of (1), the film sensitivity information of the information (so-called DX information) provided on the cartridge is read, and it is judged that the camera has set a sensitivity other than this, and at that time. The information indicating the set sensitivity may be recorded in the recording unit 202A. In the case of (2), the date of loading the cartridge or the date of taking it out stored in the memory in the CPU may be recorded in the recording unit 202A.

In the case of (3), the information to be recorded may be set in advance and recorded in the recording section 202A. In the case of (4), it is sufficient to store in the memory in the CPU that the image capturing was performed with recording of the trimming range, and record this in the recording unit 202A. Further, it is possible to record information indicating how many frames and which frames have been photographed with recording of the trimming range.

[0074]

According to the present invention, the information regarding the type of the cartridge is detected and the photographing operation is prohibited according to the detection result. Therefore, even if the cartridge which should not be photographed is loaded, the photograph is taken. There is nothing to do.

[Brief description of drawings]

FIG. 1 is a perspective view showing a first embodiment of the present invention.

FIG. 2 is a cross-sectional view of a cartridge chamber portion showing an essential part of the present invention.

FIG. 3 is a block diagram for explaining an electric system of the embodiment shown in FIG.

FIG. 4 is an explanatory view of the operation of the back cover locking part shown in FIG. 1, and is a plan view of the back cover locked.

5 is an operation explanatory view of the back cover locking portion shown in FIG. 1, and is a plan view showing a state in which the back cover is unlocked.

FIG. 6 is a perspective view showing a second embodiment of the present invention, showing a state in which the back cover is opened.

7 is a partially cutaway side view showing a lock release portion of the back cover in FIG.

FIG. 8 is a sectional view showing a schematic configuration of an embodiment of a detector.

FIG. 9 is a perspective view showing an example of a release prohibiting device.

10 is a block diagram for explaining the electric system of the second embodiment shown in FIG.

11 is a cross-sectional view of the cartridge compartment with the back cover closed in the embodiment of FIG.

12 is a flow chart for explaining the operation of the second embodiment shown in FIG.

FIG. 13 is a perspective view showing a state in which a back lid of a drop-in loading type camera showing the third embodiment of the present invention is opened.

FIG. 14 is a sectional view of the cartridge chamber showing a state in which the cartridge is loaded and then the back cover is closed in the third embodiment.

FIG. 15 is a sectional view of the cartridge chamber showing a state when the cartridge is taken out.

16 is a block diagram for explaining the electric system of the third embodiment shown in FIG.

FIG. 17 is a flow chart for explaining the operation of the third embodiment.

FIG. 18 is a flow chart for explaining the operation of the third embodiment.

FIG. 19 is a flow chart for explaining the operation of the third embodiment.

[Explanation of symbols for main parts]

 1, 101, 102 Camera body, 1A, 101A, 201A Patrone chamber, 2, 102, 202 Patrone, 3, 103, 203 Back cover, 4 Electromagnet 5 Magnetic detection element 104 Indenter 105 Detector 106 Sliding plate 108 Lock plate 210 magnetic head 51, 151 control circuit 252A recording circuit 252B detection circuit CPU central processing circuit

 ─────────────────────────────────────────────────── ─── Continued Front Page (72) Hidenori Miyamoto 1-6-3 Nishioi, Shinagawa-ku, Tokyo Inside Nikon Oi Manufacturing Co., Ltd. (72) Inventor Daiki Tsukahara 1-3-6 Nishioi, Shinagawa-ku, Tokyo Stock company Nikon Oi Works (72) Inventor Tokuyasu Otani 1-6-3 Nishioi, Shinagawa-ku, Tokyo Stock company Nikon Oi Works (72) Inventor Hideya Inoue 1-6-3 Nishioi, Shinagawa-ku, Tokyo Stocks Nikon Oi Manufacturing Co., Ltd. (72) Inventor Atsushi Nagai 1-6-3 Nishioi, Shinagawa-ku, Tokyo Inside Nikon Oi Manufacturing Co., Ltd.

Claims (18)

[Claims] 1. A camera in which a cartridge can be loaded, comprising: information detecting means for detecting information indicating the type of the cartridge from the cartridge loaded in the camera; and information detected by the information detecting means. Accordingly, a camera having a prohibition unit that prohibits a photographing operation. . 2. The type information is information indicating a usage state of the cartridge, and the prohibition unit prohibits the photographing operation when the detection unit detects that the cartridge is in use. The camera according to claim 1, wherein: 3. The camera according to claim 1, wherein the information detecting means detects the information by detecting a change in appearance of the cartridge. 4. The information detecting means according to claim 3, wherein the information detecting means detects information by detecting a change in the outer shape of the information recording portion or a change in a predetermined position of the information recording portion. camera. 5. The cartridge further comprises a cartridge driving means for electrically driving the cartridge, wherein the information is magnetic recording information magnetically recorded on the cartridge, and the information detecting means is a cartridge by the cartridge driving means. 2. The camera according to claim 1, further comprising a reproducing head that comes into contact with the cartridge and magnetically detects the information when driven. 6. The reproducing head is brought into contact with the cartridge before the reproducing head performs information reproduction, and the contact state between the reproducing head and the cartridge is released after the information reproducing operation is completed. The camera according to claim 5, further comprising a reproducing head driving unit that drives the reproducing head. 7. A camera in which a film unit having a film, a container accommodating the film, and an information recording section capable of recording information can be loaded, and information detecting means for detecting information in the information recording section. And a prohibiting unit that prohibits the photographing operation according to the information detected by the information detecting unit. 8. The information is information indicating a usage state of the film unit, and the prohibiting unit prohibits the photographing operation when the detecting unit detects that the film unit is being used. The camera according to claim 7, wherein: 9. The camera according to claim 7, wherein the information recording section is provided on the container. 10. The camera according to claim 7, wherein the information detecting unit detects the information by detecting a change in appearance of the information recording unit. 11. The information detecting means according to claim 10, wherein the information detecting means detects information by detecting a change in outer shape of the information recording portion or a change in a predetermined position of the information recording portion. camera. 12. The apparatus further comprises a feeding means for electrically performing a transfer operation for transferring the film in the container to the outside of the container, wherein the prohibiting means is provided when the information detecting means detects the information. The camera according to claim 7, wherein the feeding operation is prohibited. 13. The camera according to claim 12, wherein the information is information related to re-exposure prevention (related to claim 30. Information is re-exposure prevention information). 14. The information detecting means detects the re-exposure prevention information recorded when the film unit having the re-exposure prevention information recorded in the information recording section is reloaded into the camera. The camera according to claim 13, wherein: 15. An information recording unit driving unit for electrically driving the information recording unit, wherein the information is magnetic recording information, and the information detecting unit is an information recording unit by the information recording unit driving unit. 8. The camera according to claim 7, further comprising a reproducing head that magnetically detects the information by coming into contact with the information recording section when the camera is driven. 16. The reproducing head is brought into contact with the information recording section before the reproducing head reproduces information, and the contact state between the reproducing head and the information recording section is released after completion of the information reproducing operation. 16. The camera according to claim 15, further comprising a reproducing head driving means for driving the reproducing head so that the reproducing head is activated. 17. The information is partial exposure information indicating that an unexposed frame remains on the film, and the prohibition unit prohibits the photographing operation when the partial exposure information is detected. The camera according to claim 7, wherein: 18. The information is partial exposure information indicating that an unexposed frame remains on the film. When the partial exposure information is detected, the unexposed frame of the film can be photographed. 8. The camera according to claim 7, further comprising a feeding means for feeding the film.