JPH05232560A - Camera - Google Patents

Abstract

PURPOSE:To prevent erroneous exposure or the damage of a camera by preventing the release of the lock of a cover provided in a cartridge chamber while repeating the operation of drawing out film from a cartridge and winding it round a spool. CONSTITUTION:In a camera which automatically repeating the operation of drawing out the film from the film cartridge loaded in the cartridge chamber and winding it round the spool plural times in the case of failing in such operation, an actuator driving part AC controls a solenoid Mg for locking the cover provided in the cartridge chamber so that the erroneous exposure caused by erroneously opening the cover in the midst of photographing may be prevented. Then, in the case of failing in the first initial loading, the lock of the cover in the cartridge chamber is not released even though the film is rewound in order to perform second and succeeding initial loading. Thus, a situation that the lock is released to the time of failure in the first initial load and the cover is opened at that time is prevented.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera in which a lid of a cartridge chamber (cartridge chamber) is locked while a cartridge is loaded and photographing is performed.

[0002]

2. Description of the Related Art When a cartridge is loaded in a camera, the film is prevented from being erroneously exposed, and when the film is already wound on a spool, it prevents the camera from being broken by forcibly removing the cartridge. Therefore, there is proposed a camera that locks the lid of the cartridge chamber to prevent the lid from being opened carelessly until the film is completely rewound after photographing is completed. On the other hand, in a camera that automatically unwinds the film from the film outlet of the cartridge loaded in the cartridge chamber and winds the leading end of the film on the spool, if this initial load operation fails, the film is rewound once and re-wound. Those that perform initial loading have been proposed.

[0003]

In a camera of the type which performs such re-initial loading, when the lid locking mechanism for the cartridge chamber is provided, the initial loading fails and the film is rewound once. At times, the lock mechanism is released. If the lock is released at this point, the lid can be opened, and the above-mentioned problem may occur. The present invention, in view of the above problems, until the film is rewound until it is finally determined that the initial load has failed, even if the film is rewound until it is determined that the lid lock has failed. An object of the present invention is to provide a camera that does not unlock the lid.

[0004]

SUMMARY OF THE INVENTION According to the present invention, an operation of feeding a film from a film cartridge loaded in a cartridge chamber and winding the film around a spool is automatically repeated a plurality of times when the operation fails, and the film is a cartridge. In a camera that has a mechanism that locks the lid provided in the cartridge chamber during the period when the
It is characterized in that the lid is not unlocked during the plurality of operations.

[0005]

Embodiments of the camera according to the present invention will be described below. First, the configuration of the electric circuit of the camera will be described with reference to the block diagram shown in FIG. CP shown in the center of the drawing represents a microcomputer (hereinafter, referred to as a microcomputer) that controls the operation of the camera. FLS shown above the microcomputer CP is a flash control unit, and controls the light emission operation of the flash through the microcomputer CP. Further, LM and AF shown at the lower right of the flash control unit FLS represent a photometry unit and a distance measurement unit, respectively, which perform photometry and distance measurement in accordance with a command from the microcomputer CP, and also transmit measurement data to the microcomputer CP. Give feedback to. DS, which is further below, indicates a display control unit, which controls the display of various data in a display window provided in the camera body.

S ₀ to S ₁₀ shown below the display control unit DS indicate various switches, and the operation of the camera is determined according to the on / off state of these switches.
S ₀ is a main switch for operating the camera in the ON state, S ₁ is a photometric switch for performing photometry in the ON state, and S ₂ is a release switch for performing shutter release in the ON state. Also, this camera is a camera in which the zooming is performed electrically, and the S ₃ is turned on by operating the zoom switch button provided on the camera body to the wide-angle side, and the viewfinder is set to the tele (telephoto) side. Is a zoom-out switch for changing from the wide side to the wide side, and S ₄ is a zoom-in switch for turning on the viewfinder from the wide side to the tele side by operating the zoom switch button to the tele side in reverse. is there. It should be noted that the photographing lens for changing the photographing range according to the operation of the finder is also zoomed accordingly, or the photographing lens itself is not zoomed and the print range is limited to cope with the change of the photographing range. The trimming information for this is given to the film at the time of shooting.

Reference numeral S ₅ denotes a cartridge lid switch which is turned on when the opening / closing lid for inserting the cartridge into the camera body is closed. S ₇ is a magnetic head position detection switch which is turned off when the magnetic head unit for reading / writing information from / in the magnetic recording unit of the film is in the data processing position. Then, S ₈ is a flash switch for controlling the flash emission ON / OFF in accordance with the ON / OFF state, and S ₉ is OFF when the loaded film is unused and has been used. This is a film use indication detection switch that is turned on in the case. S ₁₀ is the cartridge detection switch for loading organic-free detection of the cartridge.

A DTC shown below the microcomputer CP is a data control unit connected to a magnetic head HD for processing photographed data for the film. Microcomputer CP
AC shown on the left side of FIG. 1 is an actuator drive unit, which prewinds the film (winds the film in the cartridge once to the spool after loading) and winds the first motor M ₁ and the finder at the tele position and the wide position. A second motor M ₂ for operating between the position and a plunger P for abutting / retracting a pad, which is arranged to face the magnetic head portion with the film interposed therebetween, to / from the head.
L, the solenoid Mg for locking the lid so as to prevent accidental exposure by opening the lid during photography is controlled. EX, which is shown below AC, is an exposure control unit that controls the operation of the third motor M ₃ that focuses the photographing lens and drives the shutter. Further, EN shown below is a zoom encoder for detecting the zoom position in the viewfinder, and PI below it is a photo interrupter for detecting whether or not the film is fed frame by frame.

FIG. 2 is a view showing the overall arrangement of the camera of the present invention and a method of loading a cartridge into the camera. 1 is a camera body, 2 is a taking lens, 3 is a finder window, 4 is a flash light emitting window, 5 is a subject distance measuring window, 6
Is a cartridge chamber, 7 is a lid of the cartridge chamber which can be opened and closed with an axis 7a as a fulcrum, 8 is a stopper for fixing the closed lid 7, and 9 is a film cartridge.

In FIG. 3, after the user closes the lid 7, the pawl 7b of the lid 7 is turned to the end 8 of the stopper 8 by turning the stopper.
It is the figure which showed the state locked by a. FIG. 4 is a view showing a state in which the rotation of the stopper 8 with the lid 7 fixed is locked, and the action arm X of the solenoid Mg is rotated clockwise in the figure, The cam 10 having the fulcrum 10a engaged with the working arm X is rotated, and the pin 8b provided on the stopper 8 is fitted into the notch 10b of the cam 10.

FIG. 5 shows that by energizing the solenoid Mg,
When the action arm X rotates counterclockwise, the cam 10 rotates in the opposite direction to the stopper 8 and the cam 10.
The state where the fitting with is released is shown. This solenoid Mg
Is a bistable type in which the working arm X stabilizes in either the state of FIG. 4 or FIG. 5 each time it is energized.

FIG. 6 shows a drive mechanism in the first motor M ₁ for prewinding and winding the film. The rotation power of the first motor M ₁ is the reduction system 21.
It is connected to the input gear 22 via. Input gear 21
Is rotated by the spool input gear 23 for the spool gear 29a of the spool 29 and the fork input gear 2 for the fork gear 24a for driving the fork 24.
5 is transmitted to each of 5 via a gear train (not shown).
A planet carrier 28 that holds a planet gear 27 having the gear 23 as a sun gear is rotatably mounted on a shaft 26 that supports the spool input gear 23, and in accordance with the rotation of the spool input gear 23, When the planetary gear 27 meshes with the spool gear 29a and is released, the spool 29
It is configured so that driving or non-driving can be selected.

An L-shaped planet carrier 33, which holds two planet gears 31 and 32 having the gear 25 as a sun gear, is rotatably mounted on a shaft 30 supporting the fork input gear 25. According to the rotation of the fork input gear 25, the planet gears 31 or 32 are engaged with and released from the fork gear 24a so that the drive rotation direction of the fork gear 24a of the fork 24 can be selected. ing. The spool 29 is driven by a gear train so that the peripheral speed of the spool 29 is always higher than the peripheral speed of the fork 24. After the film is wound around the spool 29, the planet gear 31 and the fork gear 24a are intermittently operated. The peripheral speed difference is absorbed by being separated.

FIG. 7 shows a film used in the present invention. When the film is not used, the film 41 is completely wound in the cartridge 9, and when the cartridge 9 is loaded in the cartridge chamber 6. The film 41 is fed out from the cartridge 9 by the mechanism described above.

In FIG. 7, a region # 1 surrounded by a broken line is the first exposure frame position, and from this position, the film front end portion 41a.
Is the leader section. On the tip side of the first frame # 1,
The perforation PFA ₁ is provided, the perforation PFB ₁ is provided at the tip end side of the first frame # 1, and the perforation PF is provided at the rear end of the first frame # 1.
A ₂ is provided, and a similar perforation is provided for each piece thereafter. As shown in FIG. 8, the m-th piece #m has perforations PFBm and PFAm + _{1 at} the rear end of the tip of the piece, respectively. Is provided.

FIG. 8 is a view showing the arrangement of the respective parts when the film cartridge 9 is loaded in the cartridge chamber 6 of the camera body 1, 29 is the aforementioned spool, 29b is the spool chamber, HD and PI indicates a magnetic head and a photo interrupter.

The positional relationship between the photo interrupter PI and the film 41 is shown in FIGS. 9 and 10. When the film 41 is located directly below the photo interrupter PI, the light emitted from the light emitting portion of the photo interrupter PI is reflected by the film 41 and is incident on the light receiving portion of the photo interrupter PI, while the perforation PF is immediately below the photo interrupter PI. When is located, the emitted light does not enter the light receiving portion. The presence or absence of the film 41 and the detection of the perforation PF are performed by the presence or absence of this incident light. Figure 8
Shows the state where the m-th frame #m is accurately aligned with the position of the exposure frame Q.

Further, in FIG. 8, considering the length of the leader portion in FIG. 7, if the photo interrupter 73 detects the perforation PFA ₁ , it can be considered that the leader portion is sufficiently wound around the spool 29. In the example, the winding of the film 41 around the spool 29 is determined based on this.

FIG. 11 is a view showing the structure of the final frame #n of the film 41. At the rear end of the last frame #n, perforations PFAn + ₁ and PFBn + ₁ are provided in the same manner as the respective frames, and one perforation PFE indicating that the last frame is completed is provided from the perforation PFBn + ₁ to the cartridge 9 side. ing.

12 to 17 are flow charts showing the operation of one embodiment of the above configuration. FIG. 12 is a flowchart showing the entire operation. In step S1, it is determined whether or not the microcomputer CP is activated by the switch S ₅ being turned on when the lid 7 of the cartridge chamber 6 is closed. If the switch is turned on, the process proceeds to step S2 and the detection switch S _{When 10} is turned on, the cartridge chamber 6
It is determined whether or not the film cartridge 9 is loaded in the recording medium. If it is not loaded, this operation ends. If it is loaded, the prewind subroutine is executed in step S3. Details of this subroutine will be described later with reference to FIGS. 13 to 16.

On the other hand, if it is determined in step S1 that the activation is not caused by the switch S ₅ being turned on, the process proceeds from step S1 to step S4, and it is determined whether the activation is caused by the switch S ₅ being turned off. If the activation is performed by changing the switch S _{5 to} the off state, the film end warning is canceled in step S5, and the operation ends.

When it is not started by the change of the switch S ₅ to OFF, it is determined in step S6 whether or not the main switch S ₀ is on. If it is off, the operation does not proceed to the following operation and is displayed in step S7. If the main switch S ₀ is turned on, the display is turned on in step S8, and it is determined in step S9 whether or not the photometric switch S ₁ is activated by turning on the photometric switch. If it is started by turning on S ₁ , light measurement and distance measurement are performed in step S10, and the result is stored.

Next, in step S12, the release switch S ₂ is waited to be turned on. If the photometric switch S ₁ is turned off before the release switch S ₂ is turned on, the flow from step S11 to the following steps is advanced. First, this operation ends, but if the release switch S ₂ is turned on, an exposure control operation is performed in step S13, and one film 41 of one frame is stored in the cartridge 9 in the winding subroutine of step S14. Get caught up in. Details of this subroutine will be described with reference to FIG.

When the subroutine of step S14 is completed, it waits for the photometric switch S _{1 to} be turned off in step S15, and when it is turned off, this operation ends.

On the other hand, if it is determined in step S9 that the photometric switch S ₁ is not started by being turned on, the process proceeds to step S16, and the flash mode selector switch S ₈
Whether by on or start is determined, if activated by the switch S _8, step S17, switched at step S18 to the flash mode, the display of the flash mode is performed, and the operation is finished.

On the other hand, in step S16, the switch S
If it is not started by turning on the switch ₈ , it is started by turning on the zoom switch S ₃ or S ₄ , so in step S19, zoom to the tele side or the wide side according to the turning on of the switch S ₃ or S ₄ , and then step The focal length is displayed in S20.

Next, the prewind subroutine is shown in FIG.
16 to FIG. By energizing the solenoid Mg in step S31, the stopper 8 for the lid 7 is locked as described in FIG.
At 32, the register ELF that counts the number of times of initial load failure is reset. Then step S3
At 3 the forward rotation of the first motor M ₁ causes the film 41 to be fed out of the cartridge 9, as described with reference to FIG.

In step S34, the timer is started when the first motor M ₁ is activated, and in step S35, the detection signal of the photo interrupter PI is turned from OFF to ON because the leading edge of the film has passed through the photo interrupter PI. It is determined whether or not the film 41 is fed from the cartridge 9, depending on whether or not the step S3.
If the PI is turned on (if the film is fed out) before the timer counts up a predetermined time in 6, the process proceeds to step S61, the register ELF is reset to 0, and then in step S62, the perforation PFA is performed. ₁ passes through the photo interrupter PI and P
It is determined whether the leading edge of the film has been wound up on the spool, depending on whether I has been detected to be off, and step S34
If the timer started in step S63 detects that the PI is off (when it is wound up on the spool) before counting up the predetermined time in step S63, the process proceeds from step S62 to step S81 to start the first timer. 1 Motor M ₁ is stopped.

In the next step S82, the perforation count register PC, the frame number register i, and the unexposed frame number register FN are reset. Then, in order to move the magnetic head HD to the information processing position, the plunger PL is energized in step S83, and the first motor M ₁ is normally rotated in step S84.

In step S85, it waits until the position detection switch S ₇ is turned off due to the movement of the magnetic head HD to the information processing position. When the switch S ₇ is turned off, one frame at step S86 is started time of the timer counting that needs to be delivered, the photointerrupter PI is changed in the film from the perforations in the step S87 in that time If is detected, step S
When the register PC is incremented by 1 at 88 and the value of the register PC becomes 2, that is, the perforation P at the leading portion of the frame with respect to the film feeding direction.
If FAm and PFBm pass through the location of the photo interrupter PI, the process proceeds from step S89 to step S90, the frame number i is incremented by 1, and step S91.
At, the signal from the magnetic head HD is read.

In step S92, it is determined from the read data whether or not it is unexposed. If exposed, in step S93, 1 is set in the i-th area EX (i) of the RAM map corresponding to each frame, and unexposed. Then, step S
In step 94, EX (i) is set to 0, and step S95
Then, the content of the unexposed frame number register FN is incremented by one.

After that, in step S96, when the next perforation PFAm + ₁ is detected by the photo interrupter PI by the feeding of the film, step S97.
The register PC is reset to 0 by, and step S
At 98, a timer for counting the time required for feeding one frame is started, and the process returns to step S87.

By repeating the above operation, the information of each frame is read, the same judgment is made, and the spool 29 from the film cartridge 9 is formed while the RAM map is being prepared.
The film 41 is wound on. Then, the perforations PFAn + ₁ and PFBn + _{1 at} the rear end of the last frame #n are detected, and when the last perforation PFE is detected, the film 41 is stretched, and no further perforations are detected. Therefore, the timer is set in step S99. It counts up, and after this, step S10 in FIG.
Go to 1.

The operation of the first motor M ₁ is stopped in step S101, and the reading of magnetic information is stopped in step S102. At this point, the number of pairs of perforations is one more than the number of photographed frames, so step S103,
In step S104, 1 is subtracted from the number i of frames and the number FN of unexposed frames, and the power to the plunger PL is turned off to retract the magnetic head HD from the information processing position. As a result, the magnetic head position detection switch S
_{When 7} is turned on, step S106 to step S1
Go to 09.

After step S109, the operation of moving the first unexposed frame to the position of the screen frame Q is performed. In step S109, the unexposed frame number j having the largest frame number is searched from the RAM map, and then step S110.
At this point, 1 is added to the difference between the maximum frame number i and the j, and the value (i-j + 1) is set in the feed frame number register PCC. The reason for setting (i-j + 1) is i = n at this point, and if i = n-1,
A pair of perforations PFBn that pass through the photo interrupter PI before the N-1 frame reaches the exposure position.
+ _1, PFAn + ₁ and PFBn, there is a two pair PFAN. In addition, the perforation PFE will also be passed, but the countermeasure against this is step S.
Made at 112.

In step S111, the reverse rotation of the first motor M ₁ is started, and in step S112, the detection of the photo interrupter PI waits for the perforation PFE to pass. When the perforation PFE passes, the content of the perforation count register PC is reset to 0 in step S113, and in the next steps S114 to S116, it is detected that the pair of perforations passes, and when the passage is detected, the step is performed. Number of frames i and register PC in S117 and S118
The value of C is reduced by one.

In step S119, it is determined whether or not the PCC value has become 0. If it is not 0, step S113
If PCC = 0, it is further determined in step S120 whether or not the unexposed frame number j is 0. However, since normally j is not 0, the process proceeds to step S121 and the first motor M ₁
Is stopped, and the number of frames that can be photographed F in step S122
After N is displayed, the process returns to the main routine.

On the other hand, if J = 0, it means that the cartridge 9 in which all the frames of the film have been exposed is loaded, and in this case, the prewinded film needs to be rewound to the cartridge 9 side. Step S12
Proceed to step 3, where the film tip is the photo interrupter P.
Waiting for the film to pass through I, and in step S124, a timer is started in order to set the time required for film winding. If the timer times up the time, the process proceeds from step S125 to step S126.
The first motor M ₁ is stopped, and a film end warning is given in step S127.

The flow described above is the case where the film 41 is fed from the cartridge 9 in the first initial load try and the leading end of the film is wound up on the spool, and the loading is successful. The flow in the case of failure will be described below.

Steps S35 and S36 in FIG.
In the case where the photo interrupter PI does not detect the leading edge of the film even when the timer has timed up the predetermined time, that is, when the film 41 is not fed out from the cartridge 9, the process proceeds from step S36 to step S37 to rotate the film forward. The first motor M ₁ that had been
In step S38, the register ELF that counts the number of failures of initial loading (here, the feeding of the film from the cartridge 9) is incremented by 1. Then, in order to perform the initial loading again, the first step is performed in step S39.
When the motor M ₁ is rotated in the reverse direction and the timer started in step S40 times up the predetermined time in step S41, the reverse rotation of the first motor M ₂ is stopped in step S42.

[0041] Thereafter, in step S43, the forward rotation of the first motor M _1, although initial loading again is performed, in the second and subsequent has a first driving speed of the motor M ₁ be different from the first time, In this embodiment, the motor M ₁
The duty is controlled to feed the film intermittently. In the next step S44, the timer is started, and if the photo interrupter PI detects the leading edge of the film before the timer counts up the predetermined time, that is, it means that the film has been successfully delivered from the cartridge 9. After that, the process merges into step S61 described above.

On the other hand, if the film 41 is not fed out from the cartridge 9 even after the lapse of a predetermined time, the process proceeds from step S46 to step S47, the first motor M ₁ which has been normally rotated is stopped, and the step Register E that counts the number of initial load failures in S48
LF is incremented by 1.

In steps S49 to S52, as in steps S39 to S42 described above, it is determined whether the first motor M ₁ is reversely rotated for a predetermined time, and the register ELF is not 3 in step S53. If it is less than 3, the process returns to step S43 and the initial load is repeated again. However, if the initial load has already been tried three times, the process proceeds from step S53 to step S54 and the loading is unsuccessful. Warning is displayed, and the solenoid Mg is energized in step S55, whereby the cartridge chamber 6
Since the lock of the stopper 7 with respect to the lid 7 is released, after that, by rotating the stopper 8, the lid 7 is rotated.
Can be opened. After that, the process returns to the main flow of FIG.

When the film 41 is successfully fed out from the cartridge 9 in the first or second or third try, it is then determined in step S62 whether the leading end of the film has been wound onto the spool. If the winding fails, the process proceeds from step S63 to step S64, the first motor M ₁ is stopped, and the step S
A register ELF that counts the number of failed initial loads (here, winding of the film on the spool) at 65
(Reset to 0 in step S61) is incremented by 1, and in step S66 the first motor M
The reversal of ₁ starts the film winding. In step S67, the leading end of the film is wound from the photo interrupt PI to the cartridge 9 side,
The first motor M ₁ is stopped in step S68 after waiting for the photo interrupt PI to turn from ON to OFF (at this point, the film is not completely wound in the cartridge 9).

Next, steps S68 to S77.
Is a loop for rewinding the leading end of the film onto the spool, and this loop is different from the first loop in the same manner as the loop of steps S43 to S53 for retrying the film feeding described above. The first motor M ₁ is driven at a speed.

Now, if the leading edge of the film is taken up on the spool and the photo interrupt PI detects the perforation PFA ₁ within 3 tries, the step S7 is performed.
The process merges from step 1 to step S81 in FIG. On the other hand, in the case where the leading end of the film is not wound up on the spool in spite of performing three tries, the process proceeds from step S77 to step S50, and the film is rewound into the cartridge 9 and then loaded as described above. Is warned that the cartridge chamber 7 is unlocked.

A subroutine for rewinding to the next unexposed state after the exposure control operation is completed will be described with reference to FIG.
First, in step S200, the number of unexposed frames FN is decremented by 1. Since various information (including exposed data) needs to be written from the magnetic head HD at the time of rewinding by the first motor M _1, the operation of moving the magnetic head HD to the information processing position in steps S201 to S203 is performed. Done. Then, writing is performed in step S204 while continuing the reverse operation of the first motor M ₁ , and then the perforation is performed by the photo interrupt PI.
Passing through the steps S205 to S20
Wait at 8. When the passage is detected, step S2
At 09, information writing is stopped. At this point, (m
When the number of frames of -1) is taken, the film is
It is in the state shown in.

After that, the magnetic head HD is retracted from the information processing position in steps S210 to S213, and the number i of frames is decremented by 1 in step S214. In step S215, the value of i is determined. If i = 0, it means that the shooting of the first frame # 1 is completed and that frame is also rewound. Therefore, the process proceeds to step S240, and the first motor M ₁ is reversed, and then the process proceeds to step S230.

On the other hand, if i is not 0, step S2
The next unexposed frame number j is searched at 16 and step S
At 217, it is determined whether i = j. If i = j, the next unexposed frame will be positioned in the exposure frame Q by the above-mentioned rewinding, so the process moves to step S229 and the number of unexposed frames FN is displayed. To return.

On the other hand, if i is not equal to j, it means that the unexposed frame has not reached the exposure frame Q, so that the film rewinding is performed by the reverse rotation of the first motor M _{1 in} step S218. Then, in step S219, the difference between the current frame number i and the unexposed frame number j is set in the register PC. In steps S220 to S226, the perforations are counted and rewound by the set number of frames (i-j). When the rewinding is completed, it is determined in step S227 whether or not there is no unexposed frame by j = 0. If not, the first motor M ₁ is stopped in step S228, and further step S229. The remaining number of frames is displayed at and the process returns to the main routine.

On the other hand, if no unexposed frame remains, the leader section is further wound into the cartridge chamber 6 in steps S230 to S233, and step S
By energizing the solenoid Mg at 234, the lock of the lid 7 of the cartridge chamber 6 is released, and at step S235, the end of film winding is warned and the process returns to the main routine.

[0052]

As described above, the present invention has a mechanism for locking with respect to the lid provided in the cartridge chamber, and when the initial initial load fails, a camera that performs multiple initial loads can be used. Even if the film is rewound to perform the initial loading after the first time, the lid is not unlocked, so the lock is released when the initial loading fails and the lid is opened at that time. It is possible to prevent the camera from being damaged due to erroneous exposure or erroneous removal of the cartridge.

[Brief description of drawings]

FIG. 1 is a block diagram showing an electric circuit of a camera of the present invention.

FIG. 2 is a perspective view showing the appearance of a camera of the present invention.

FIG. 3 is a view showing a mechanism of a cartridge lid in the camera of the present invention.

FIG. 4 is a view showing a mechanism for locking the mechanism of the cartridge lid of FIG.

FIG. 5 is a view showing a state in which the lock is released in FIG.

FIG. 6 is a view showing a drive mechanism for winding a film in the camera of the present invention.

FIG. 7 is a diagram showing a film used in the camera of the present invention.

FIG. 8 is a diagram showing a situation in which the film of FIG. 7 is loaded in a camera.

FIG. 9 is a diagram showing the arrangement of photo interrupts provided in the camera of the present invention.

FIG. 10 is a diagram showing a positional relationship between photo interrupts and perforations.

FIG. 11 is a diagram showing various perforations provided in the film of FIG.

FIG. 12 is a flowchart showing the overall operation of the camera of the present invention.

FIG. 13 is a flowchart showing a prewind subroutine in FIG.

FIG. 14 is a flowchart showing a prewind subroutine in FIG.

FIG. 15 is a flowchart showing a prewind subroutine in FIG.

16 is a flowchart showing a prewind subroutine in FIG.

FIG. 17 is a flowchart showing a film rewinding subroutine in FIG.

[Explanation of symbols]

1 Camera Body 6 Cartridge Chamber 7 Lid 8 Stopper 9 Film Cartridge 10 Cam CP Microcomputer Mg Solenoid PL Plunger PI Photointerrupt HD Magnetic Head M ₁ First Motor

Claims (1)

[Claims] 1. An operation of feeding a film from a film cartridge loaded in a cartridge chamber and winding the film around a spool is automatically repeated a plurality of times when the operation fails, and the cartridge is fed while the film is being fed from the cartridge. A camera having a mechanism for locking a lid provided in a chamber, wherein the lid is not unlocked during the plurality of operations.