JPH09197514A - Film loading controller - Google Patents

Abstract

PROBLEM TO BE SOLVED: To secure the precision of the stopping position of a first unexposed frame with reference to a photographic exposure position and to enhance reliability by driving a winding/driving means so that film may be wound by a given amount after moving a magnetic reproducing head to a position where it is retreated from film and positioning the first unexposed frame at the photographic exposure position. SOLUTION: By driving and reversely rotating a motor, the magnetic head 87 is retreated from a film surface. Then, the film 100 already exposed to its 8th frame F8 is reloaded and rephotographing is started from the first unexposed frame F9. Namely, after completely finishing feeding the first unexposed frame F9 'state D', the film 100 is rewound by two frames reversely state E, and wound by one frame again state F, so that the first unexposed frame F9 is positioned at the photographic exposure position and rephotographing is started from the first unexposed frame F9.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a film loading control device for a camera having an automatic halfway film reloading function.

[0002]

2. Description of the Related Art Recently, a camera capable of magnetically recording data on a film has been proposed. The film used in this camera has a magnetic track corresponding to each frame (shooting exposure frame) of the film. When this film is loaded into the camera, the magnetic information related to the shooting is recorded on the corresponding magnetic track for each shooting of each frame. As a result, various services can be provided on the side of processing the photographed film. That is, by reproducing the magnetic information recorded when printing the photograph after development, it is possible to provide the user with additional information and optimize the printing conditions for printing.

On the other hand, another usage of this type of camera is conceivable. That is, for example, Japanese Patent Laid-Open No. 4-1
This is the usage as disclosed in Japanese Patent No. 71433. In this Japanese Patent Application Laid-Open No. 4-171433, when a film taken halfway is reloaded, the recorded information on the magnetic track of each frame is reproduced to determine whether the frame has been taken or has not been exposed. Then
The film is automatically fed until an unexposed frame appears. This function is called the "halfway taken-out film automatic reloading function". By providing this automatic take-out film reloading function, "a conventional user remembers the number of frames that have been shot by himself and repeats the number of frames taken by himself when reloading, so that the film can be taken out once. You can let the camera do the tedious and dangerous work automatically, such as trying to reshoot with the rest of the film.

[0004]

In order to realize this automatic take-out film reloading function, it is necessary to feed the film while judging the presence or absence of the recorded information on the magnetic track, which is a problem. Is the arrangement of the magnetic reproducing head. Normally, in this type of camera, the magnetic information relating to the photographing is written in the magnetic track of the film, so that the magnetic recording head is arranged at the optimum position for recording the magnetic information in the magnetic track of the frame immediately after the photographing. Due to space and cost constraints, the magnetic recording head and the magnetic reproducing head are often designed as an integrated magnetic head in which a coil is formed on a common core. Due to the arrangement of this integrated magnetic head, when a frame with no recorded information is detected on the magnetic track for the first time while the film is being fed in the winding direction, that frame will be lost due to the "automatic film reloading function". Since it has passed the shooting exposure position (shooting preparation position), one unexposed frame is wasted.

Therefore, when realizing the automatic take-out film reloading function, the applicant of the present invention accurately positions the first unexposed frame at the shooting exposure position and can start reshooting without waste. We are developing equipment. With this film loading controller under development,
When a frame with no recorded information is detected on the magnetic track for the first time while feeding the film in the winding direction,
On the contrary, by rewinding by 2 frames and then rewinding by 1 frame again, the first unexposed frame is positioned at the photographing exposure position, and re-imaging can be started from the first unexposed frame.

By adopting such a method, it is possible to accurately position the first unexposed frame at the photographing exposure position and restart re-imaging from the first unexposed frame without waste. Further, as another method, it is conceivable to position the first unexposed frame at the photographing exposure position by rewinding by one frame after the first unexposed frame is completely fed. In this case, when the first unexposed frame is positioned at the shooting exposure position by rewinding and when the first unexposed frame is positioned at the shooting exposure position by winding up, it stops due to the effect of backlash. The position is different. In other words, if the method of positioning the first unexposed frame at the shooting exposure position by rewinding by one frame, the first unexposed frame is not accurately positioned at the shooting exposure position on the assumption that the film is rolled up, and the film is stopped. Precision is not obtained. On the other hand, in the film loading control device under development by the present applicant, since the first unexposed frame is located at the photographing exposure position by finally winding up one frame, the stopping accuracy is ensured.

However, in this film loading control device being developed by the applicant, the magnetic head for detecting the presence / absence of recorded information on the magnetic track is kept in close contact with the film until the end. That is,
Rewind 2 frames to find the unexposed frame,
The magnetic reproducing head is kept in close contact with the film during the winding of one frame. Therefore, unnecessary mechanical load increases, and power is wasted. Particularly, in the winding control for the last one frame, there is a possibility that the accuracy of the stop position may not be ensured due to the load fluctuation, and the reliability is lowered.

The present invention has been made to solve such a problem, and an object of the present invention is to secure the accuracy of the stop position with respect to the photographing exposure position of the first unexposed frame and to improve the reliability. An object of the present invention is to provide a film loading control device that can be enhanced.

[0009]

In order to achieve such an object, a first invention (an invention according to claim 1) is a winding drive means for driving a loaded film in a winding direction and a film winding operation. Rewinding driving means for driving in the returning direction, frame passage detecting means for detecting passage of each frame of the film to the photographing exposure position, and recording information on the magnetic track provided corresponding to each frame of the film A magnetic reproducing head for reproducing the frame while passing the photographing exposure position, and a head advancing / retracting driving means for selectively moving the magnetic reproducing head to a position in which the magnetic reproducing head is closely attached to the film and a position retracted from the film When the cartridge in which the film is photographed halfway is reloaded, the winding drive means, the rewind drive means, and the head advance / retreat drive means are controlled. A reloading control means for positioning the first unexposed frame of the film photographing exposure position provided by reloading the control unit, while maintaining a position close contact with the magnetic read head in film, by driving the winding drive means,
Each time the frame passage detecting means detects passage of one frame of the film, it is judged based on the output of the magnetic reproducing head whether or not the recording information is written on the magnetic track corresponding to the frame, and the recording information is recorded. The winding drive is continued until it is determined that the recording information has not been written, and after it is determined that the recording information has not been written, the head advancing / retreating drive means is driven to move the magnetic reproducing head to the position where the magnetic reproducing head is retracted from the film. , A rewinding drive means is driven to rewind the film by a predetermined amount to one frame, and then a winding drive means is driven to wind up the film by the predetermined amount, so that the first unexposed frame is exposed at the photographing exposure position. It is designed to be located at.

According to the present invention, while the magnetic reproducing head is held at the position where the magnetic reproducing head is in close contact with the film, the film that has been photographed halfway is driven in the winding direction and one frame of the film with respect to the photographing exposure position. Each time the passage is detected, it is determined whether or not the recording information is written on the magnetic track corresponding to the frame, and the winding drive is continued until it is determined that the recording information is not written. If it is determined that the recording information has not been written, the magnetic reproducing head is moved to a position retracted from the film, and is rewound for, for example, 2 frames (the amount added to the 1 frame by a predetermined amount). By being wound up (a predetermined amount), the first unexposed frame is located at the photographing exposure position.

A second aspect of the invention (the invention according to claim 2) is a winding drive means for driving the loaded film in the winding direction, a rewinding drive means for driving the film in the rewinding direction, and each frame of the film. Frame passage detection means for detecting passage to the photographing exposure position and recorded information on the magnetic track provided corresponding to each frame of the film are reproduced while the frame passes the photographing exposure position. When the magnetic reproducing head, a head advancing / retracting driving means for selectively moving the magnetic reproducing head to a position in which the magnetic reproducing head is closely attached to the film and a position retracted from the film, and a cartridge in which the film is photographed halfway are reloaded. , The winding driving means, the rewinding driving means, and the head advancing / retreating driving means are controlled to bring the first unexposed frame of the film to the photographing exposure position. Provided a reloading control means for location,
Whenever the frame passage detecting means detects passage of one frame of the film by driving the winding drive means while the magnetic reproducing head is held at the position of closely contacting the film by the reloading control means, it corresponds to the frame. Whether or not the recording information is written on the magnetic track is determined based on the output of the magnetic reproducing head, and the winding drive is continued until it is determined that the recording information is not written, and the recording information is not written. After it is determined that the film is rewound, the film is rewound by adding a predetermined amount of film to one frame, and then the head advancing / retreating drive unit is driven to move the magnetic reproducing head to a position for withdrawing from the film. In addition, the winding drive means is driven to wind the film by the predetermined amount, thereby positioning the first unexposed frame at the photographing exposure position. It is obtained by the.

According to the present invention, while the magnetic reproducing head is held at the position where the magnetic reproducing head is in close contact with the film, the film which has been photographed halfway is driven in the winding direction, and one frame of the film is exposed to the photographing exposure position. Each time the passage is detected, it is determined whether or not the recording information is written on the magnetic track corresponding to the frame, and the winding drive is continued until it is determined that the recording information is not written. If it is determined that the record information is not written, for example, 2 frames (the amount obtained by adding a predetermined amount to 1 frame)
After rewinding, the magnetic reproducing head is moved to a position retracted from the film and then wound up by one frame (a predetermined amount), so that the first unexposed frame is positioned at the photographing exposure position.

The third invention (the invention according to claim 3) is the first
In the invention or the second invention, the predetermined amount in the reloading control means is one frame or less. According to a fourth invention (an invention according to claim 4) in the first invention or the second invention, by detecting passage of a perforation provided at a position corresponding to each frame, a photographing exposure position of each frame is detected. It is designed to recognize the passage of.

[0014]

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, the present invention will be described in detail based on embodiments. FIG. 2 is a diagram showing a structure of a film used in a camera to which the present invention is applied, and shows a state in which a part of the film 100 wound in the cartridge 151 is pulled out. The film 100 has
Two perforations P are provided for each frame F in which one exposure is scheduled. For example, the frame F1
For frame F2 and perforations P2a and P2b for frame F2.
Is provided.

The film 100 also has a magnetic track D, and a magnetic recording allowable range for recording magnetic information for each frame F is defined. For example, a magnetic track D1 is provided corresponding to the frame F1, and a magnetic track D2 is provided corresponding to the frame F2. Both ends of each magnetic track D are regulated at positions inside the boundary position of each frame F by the lengths Ls and Le, respectively.

FIG. 3 schematically shows a part of the mechanism of a camera using the film 100 and the cartridge 151. In FIG. 3, the cartridge 151,
Film 100, perforations P3a, P3b,
The magnetic track D2 is the same as that in FIG. Reference numeral 71 is an aperture portion of the camera, and 74 is an aperture for exposing an image of a subject on each frame F of the film 100,
72 is an upper rail that regulates the position of the film 100 in the optical axis direction, and 73 is a lower rail. Reference numeral 81 is a pressure plate of the camera, and 82 and 84 are openings formed in the pressure plate 81.

Reference numeral 85 is a photoreflector, and 87 is a magnetic head (recording / reproducing integrated head). The photoreflector 85 is directly opposed to the film 100 through the opening 82 and the magnetic head 87 is opened through the opening 84. It is arranged to. In the figure, the aperture portion 71, the film 100,
Although the pressure plate 81 is shown in a separated form, in actuality, it is placed in a positional relationship where it is in close contact with almost no gap, and the photo reflector 85 is positioned at the height position of the perforation P of the film 100 as shown by the one-dot chain line 401 in the figure. Moreover, it is arranged so as to detect the reflectance at the height position of the upper rail 72. The photo reflector 85 outputs a digital signal “H” as an output when facing the upper rail 72 surface having a high reflectance at the opening of the perforation P of the film 100, and outputs a digital signal as an output when facing the film surface. The position of the open end of the perforation P is detected by outputting "L" of the signal.

Although the magnetic head 87 is arranged at a position facing the magnetic track D, it can move in both directions indicated by an arrow 404 in the figure, that is, in both directions perpendicular to the film surface. A driving force for moving the magnetic head 87 is given by a motor (head advancing / retreating motor) 88. The motor 88 and the magnetic head 87 are coupled by a transmission system (not shown), and the forward rotation of the motor 88 causes the magnetic head 8 to move.
The magnetic head 87 moves in the direction in which 7 closely contacts the film 100, and the direction in which the magnetic head 87 retracts from the film 100 by reverse rotation.

Reference numeral 51 is a spool (winding spool) for winding the film 100, and the film 100 moves in the winding direction by rotating the spool clockwise when viewed from above. A motor (winding motor) 61 gives a driving force to the rotation of the spool 51, and the both are connected by a driving force transmission system (not shown). Cartridge 1
A groove 151a is cut on the shaft of 51, and a fork (rewinding fork) 52 is fitted into the groove 151a.
Is rotated counterclockwise when viewed from above, the film 10
0 is wound in the cartridge 151 and moves in the rewinding direction. Conversely, when the fork 52 rotates clockwise when viewed from above, the film 100 is pushed out of the cartridge 151 in the winding direction. Fork 5
It is a motor (rewinding motor) 62 that gives a driving force to 2
And both are connected by a driving force transmission system (not shown).

FIG. 4 is a block diagram showing the electric circuit configuration of this camera. The MCU is a microcomputer. The photo reflector 85 (PR1) transmits one output to the interrupt port INT1 of the microcomputer MCU. U1 is a motor driver circuit for driving the motor 61 (M1). The motor 61 (M1) is driven by two signals from the output ports T1 and T2 of the microcomputer MCU.
Control 1) in three states: forward rotation, short circuit, and open. U2 is a motor driver circuit for driving the motor 62 (M2), which is an output port T of the microcomputer MCU.
The motor 62 (M2) is controlled in four states of forward rotation, reverse rotation, short circuit, and open by two signals of 3 and T4.

U3 is a motor driver circuit for driving the motor 88 (M3).
The motor 88 (M3) is controlled in four states of forward rotation, reverse rotation, short circuit, and open by two signals from the output ports T5 and T6 of the CU. U4 is an amplifying circuit (head reproducing signal amplifying circuit) for amplifying the current generated in the reproducing coil (magnetic reproducing head coil) H1 incorporated in the magnetic head 87 and converting it into a voltage signal, and its output is It is input to the event counter input port CNT of the microcomputer MCU. The DSP is a display device, for example, a liquid crystal display element, and its display content is instructed by the output of the display drive port PDSP of the microcomputer MCU.

Next, the operation peculiar to this camera will be described with reference to FIGS.
Description will be made with reference to the flowchart of FIG. 7, the timing chart of FIG. 8, and the schematic diagram of the feeding state of FIG. The schematic diagram of the feeding state in FIG. 1 schematically shows the relative positional relationship between each part of the film 100, the photo reflector 85 (PR1), and the magnetic head 87 at each time point. In this embodiment, as an example, the eighth frame F8
The operation in the case where the cartridge 151 containing the film 100 that has been photographed in advance is used as the intermediate take-out film and the half take-out film is reloaded will be described.

In the half-taken-out film, the film 100 is in a state of being entirely stored in the cartridge 151. When this half-taken film is set in the camera and the start of reloading of the half-taken film is instructed, the microcomputer MCU resets the variable FCNT storing the value of the film counter to 0 (step S101 shown in FIG. 5). As a result, the microcomputer MCU sends a signal to the display device DSP for displaying a display indicating that the film is not loaded, for example, a character "E" by a display setup process (not shown).

Next, the microcomputer MCU clears the variable CNT1R to 0 (step S102) and starts the motor 61 (M1) to rotate normally (step S).
103), the reverse rotation of the motor 62 (M2) is started (step S104), the value of the timer TMR is reset to 0, and time counting is started (step S105). This time point corresponds to point a in the timing chart shown in FIG.
Due to the reverse rotation of the motor 62 (M2), the leading end of the film 100 starts to be pushed out of the cartridge 151, and the leading end of the film 100 eventually comes to the photo reflector 85.
When the position (PR1) is reached, the output of the photo reflector 85 (PR1) falls to "L" as shown by point b in FIG. The position of the film 100 at this moment is as shown in [State A] of FIG.

The microcomputer MCU has a variable CN.
Wait until the value of T1R becomes 1 (step S106),
Timer TM as a timeout for it in parallel
Wait until R reaches a value equivalent to 1000 ms (step S
107). The value of the variable CNT1R is updated in FIG.
This is the interrupt processing of (a). FIG. 7A shows the interrupt port I.
It is a flowchart of the interrupt processing executed by detecting the rising of NT1, and it returns only by incrementing CNT1R, which is a storage variable of the number of inputs of rising edges, by one.

If a time-out occurs in the determination in step S107, step S191 (FIG. 6) described later is executed.
The process proceeds to the subsequent processes, but before that, the photo reflector 85
If (PR1) generates a rising edge, the variable CN
The value of T1R becomes 1 by the above interrupt processing, and the process proceeds to step S108 by the determination of step S106. At this point in time, as the film 100 is fed, the edge of the opening of the first perforation P0b is moved to the photo reflector 8
This is the time point when the position 5 (PR1) is reached, which corresponds to point c in FIG.

In step S108, the motor 62 (M2)
To open. This is because at this point, the leading end of the film 100 extruded from the cartridge 151 is already wound around the spool 51, and the film 100 can be moved in the same direction by the winding force of the spool 51. This means that the pushing force from the cartridge 151 side has already become unnecessary.

Then, in step S109, the motor 61
With respect to (M1), PWM energization with 50% normal rotation and 50% short circuit is performed to gradually reduce the moving speed of the film 100. Then, the value of the variable CNT1F is cleared to 0 (step S110), the value of the timer TMR is reset to 0, and time counting is started (step S111). The film 100 continues to move in the winding direction while decelerating, and P1a passes through the position of the photoreflector 85 (PR1) following the perforation P0b, and the output of the photoreflector 85 (PR1) thus generated Falling edges of are counted by the interrupt processing of FIG. Figure 7 (b) shows the interrupt port INT
It is a flowchart of an interrupt process executed by detecting the falling edge of 1, and returns only by incrementing CNT1F, which is a storage variable of the number of inputs of the falling edge, by 1.

The microcomputer MCU has a variable CN.
Wait until the value of T1F becomes 2 (step S112),
Timer TM as a timeout for it in parallel
Wait until R reaches a value equivalent to 1000 ms (step S
113). If a time-out occurs in the determination in step S113, the process proceeds to step S191 and subsequent steps, which will be described later, but if the photo reflector 85 (PR1) has generated two falling edges before that, the value of the variable CNT1F is 2 Then, the process proceeds to step S114 according to the determination in step S112. At this time, the end portion of the perforation P1a of the film 100 is at the photo reflector 8
5 (PR1), which corresponds to point d in FIG. 8 and is [state B] in the schematic view of FIG.

The microcomputer MCU applies the short circuit brake to the motor 61 (M1) in step S114, waits 20 ms for steps S115 to S116, and then opens the motor 61 (M1) (step S117). Then, step S11
Proceed to step 8 and set 1 in the film counter storage variable FCNT. At this time, the microcomputer MCU executes a display setup process and generates a signal so that the numerical value stored in the FCNT is displayed on the display device DSP as it is. This point corresponds to point e in FIG.
The film 100 is in a state of being almost in the [state B]. This state is equivalent to the preparation state for taking the first picture when the cartridge 151 of the film 100 used for the first time is loaded in the camera.
That is, in this state, the frame F1 is located at the photographing exposure position.

In this state, the microcomputer MCU starts the normal rotation of the motor 88 (M3) (step S121), and executes steps S122 to S123 for 20 minutes.
After waiting the time of ms, the motor 88 (M
3) is released (step S124: point f in FIG. 8). The motor 88 (M3) is a motor for moving the magnetic head 87 forward and backward, and by driving this motor forward for 20 ms, the magnetic head 87 is brought into close contact with the film surface.

The microcomputer MCU has a variable CNT1 with the magnetic head 87 in close contact with the film surface.
F is cleared to 0 (step S131), the motor 61
The forward rotation of (M1) is started (step S132), the value of the timer TMR is reset to 0, and time counting is started (step S133). Further, the value of the counter CNTH is reset to 0 (step S134), and the value obtained by counting the number of pulses input to the event counter input port CNT thereafter is set to be automatically stored in the counter CNTH.

In this embodiment, the first frames F1 to F1
It is assumed that images have been taken up to the eighth frame F8 and that some magnetic information is recorded on the magnetic tracks D1 to D8 corresponding to them. Therefore, the first
Magnetic information is recorded on the magnetic tracks D1 to D8 corresponding to the frames F1 to F8, and the magnetic head 87 moves as the film 100 moves in the winding direction from point f in FIG. Instead, a signal reading current is generated from the point g to the point h in FIG. 8, and the amplifier circuit U4 amplifies it and outputs a rectangular pulse of one cycle per 1 bit of magnetic data.

The microcomputer MCU has a variable CN
Wait until the value of T1F becomes 2 (step S135),
Timer TM as a timeout for it in parallel
Wait until R reaches a value equivalent to 1000 ms (step S
136). If a time-out occurs in the determination of step S136, the process proceeds to step S191 and subsequent steps, which will be described later, but if the photo reflector 85 (PR1) has generated two falling edges before that, the value of the variable CNT1F is 2 Then, the process proceeds to step S137 according to the determination in step S135. This time point is point i in FIG. 8, which corresponds to the point where the length of exactly one frame has been sent from point f.

The microcomputer MCU is
It is determined whether or not the value of the counter CNTH exceeds 100 (step S137), and if it exceeds 100, the process returns to step S131 via step S138 again.
If it is 100 or less, the process proceeds to the next step S139. The determination in step S137 is based on the premise that the size of the data recorded on the magnetic track D of each frame F exceeds 100 bits at the completion of shooting, and 100 pieces of magnetic information are recorded on the magnetic track D corresponding to the frame F. It is determined that the frame has been photographed beyond the bits, and if it is 100 bits or less, it is determined that the frame has not been exposed.

As described above, in the present embodiment, the recorded magnetic signal is reproduced, but the contents thereof are not decoded, and only the presence or absence of magnetic information is detected only for searching the unexposed frame. To do so. In this case, since the magnetic information is recorded in the first frame F1, the microcomputer MCU uses the film counter storage variable FCN.
The value of T (the count value of the film counter) is incremented by +1 (step S138), and step S131
Then, the process returns to the loop for detecting the presence / absence of magnetic information on the magnetic track D.

In FIG. 8, points j, k, ... Are passed, but magnetic information is detected in each frame F, and during this period, the value of the film counter storage variable FCNT is changed in step S138. The count is incremented by 1 each time a frame passes. In this way, the point in time when the point m is also passed is [state C] in the schematic diagram of FIG.
This is a state in which the eighth frame F8 has been sent.

The way of looking at FIG. 1 will now be described. In FIG. 1, a magnetic track D filled in black represents a track in which a frame F corresponding to the magnetic track D has been photographed and magnetic information has been recorded. The magnetic track D not blacked out represents a track in which the frame F corresponding to the magnetic track D is unexposed and magnetic information is not recorded. Further, in FIG. 1, the photo reflector 85 (PR1) is originally arranged at the height position of the perforation P so as to face the film 100. However, in this figure, in order to show only the position in the feeding direction of the film 100, the height is shifted and described. In addition, the magnetic head 87 also includes the photo reflector 85 (P
Similar to R1), only the position relating to the feed direction is schematically shown.

Returning to FIG. 8, the film 100, which is continuously fed, detects a section where magnetic information is not recognized on the magnetic track D for the first time after one frame from the point m to the point n. In FIG. 1, this is a section in which the magnetic track D9 of the ninth frame F9 passes the position of the magnetic head 87 after passing the [state C] to the [state D]. in this case,
At the point n in FIG. 8, the determination in step S137 is “NO”, that is, the value of the counter CNTH is 100 or less. As a result, the microcomputer MCU
Short circuit brake is applied to the motor M1 (step S13).
9), wait 50 ms from S140 to S141 to open the motor M1 (step S1).
42). This is point o in FIG. 8, and the film 100 stops at the position of [state D] in FIG. 1, that is, the position where the ninth frame F9 has been fed.

Next, the microcomputer MCU starts the reverse rotation of the motor 88 (M3) (step S151),
After waiting a time of 20 ms from S152 to S153, the motor 88 (M3) is opened (step S154: p point in FIG. 8). The motor 88 (M3) is a motor for moving the magnetic head 87 back and forth.
The magnetic head 87 retracts from the film surface by being driven in reverse for ms.

Subsequently, the microcomputer MCU
The variable CNT1R is cleared to 0 (step 1 shown in FIG.
61) and the motor 62 (M2) is started to rotate forward (step S
162), reset the value of the timer TMR to 0, and start counting time (step S163). This time point corresponds to point p in FIG. The forward rotation of the motor 62 (M2) causes the film 100 to start moving in the rewinding direction.
The microcomputer MCU waits for the value of the variable CNT1R to become 5 (step S164), and in parallel, sets the timer TMR to 2000 as a timeout for it.
It waits until the value equivalent to ms is reached (step S165).

The film 100 moves in the rewinding direction, and the perforations P10a and P9b (q in FIG. 8) are moved on the photo reflector 85 (PR1) from [state D] in FIG.
Point), P9a, and P8b (point r in FIG. 8), the value of the variable CNT1R increases by 1 in the interrupt processing described above. Then, the opening tip of the perforation P8a in FIG. 1 has a photo reflector 85 (PR1).
When it reaches the upper side, the output of the photo reflector 85 (PR1) rises as shown by the point s in FIG. 8, and the variable CNT1R
Becomes 5, the process proceeds to step S166 by the determination in step S164.

The microcomputer MCU applies the short circuit brake to the motor 62 (M2) in step S166.
After waiting a time of 50 ms in steps S167 to S168, the motor 62 (M2) is opened (step S169). This time point is point t in FIG. 8, and is a state in which the film is stopped in almost the state of [state E] in FIG.

Next, the microcomputer MCU clears the variable CNT1R to 0 (step S171), starts the normal rotation of the motor 61 (M1) (step S172),
The value of the timer TMR is reset to 0 and time counting is started (step S173). Then, the variable CNT
It waits until the value of 1R becomes 1 (step S174), and in parallel, timer TMR is set as a timeout for it.
Waits for 1000 ms equivalent value (step S1
75). If it is determined in step S175 that a time-out has occurred, the process proceeds to step S191 and subsequent steps, which will be described later, but if the photoreflector 85 (PR1) generates a rising edge (point u in FIG. 8) before that, the variable CN
The value of T1R becomes 1 by the interrupt processing described above, and the process proceeds to the next step S176 by the determination of step S174.

In step S176, the motor 61 (M
In contrast to 1), PWM energization of 50% normal rotation and 50% short circuit is started, and the moving speed of the film 100 is gradually reduced. Then, the microcomputer MCU uses the variable CN
The value of T1F is cleared to 0 (step S177), the value of the timer TMR is reset to 0, and time counting is started (step S178). The film 100 continues to move in the winding direction while decelerating, and the perforation P8b is followed by P9a by the photo reflector 85 (PR).
The falling edge of the output of the photo reflector 85 (PR1) generated by passing through the position 1) is counted by the interrupt processing described above.

The microcomputer MCU uses the variable CN
Wait until the value of T1F becomes 2 (step S179),
Timer TM as a timeout for it in parallel
Wait until R reaches a value equivalent to 1000 ms (step S
180). If a time-out occurs in the determination in step S180, the process proceeds to step S191 and later described below, but if the photo reflector 85 (PR1) has generated two falling edges before that, the value of the variable CNT1F is 2 Then, the process proceeds to step S181 by the determination in step S179. At this point, the 9th film 100
This is the time when the end portion of the perforation P9a corresponding to the frame F9 reaches the position of the photo reflector 85 (PR1), which is point v in FIG. 8 and [state F] in FIG.

The microcomputer MCU applies a short circuit brake to the motor 61 (M1) in step S182,
After waiting a time of 20 ms between steps S182 and S183, the motor 61 (M1) is opened (step S184), and this processing ends. This point corresponds to point w in FIG. 8, and is a state in which the film 100 is stopped in the almost [state F] state in FIG. 1. This state is a preparation state for taking a photograph of the ninth frame F9 of the film 100, that is, a state in which the ninth frame F9 is located at the photographing exposure position, which is the premise of the present embodiment. This means that the film 100, which has been photographed up to 8 frames F8, is reloaded, and re-imaging can be started from the first unexposed frame F9.

That is, in this embodiment, after the first unexposed frame F9 is completely fed ("state D"), the film 100 is rewound by 2 frames ("state E"), and then from there. By being rewound by one frame again (“state F”), the first unexposed frame F
9 is located at the photographing exposure position, and the first unexposed frame F9
It is ready to start re-shooting from.

Here, as another method, after the first unexposed frame F9 is completely sent ("state D"),
On the contrary, it is conceivable that the first unexposed frame F9 is positioned at the photographing exposure position by rewinding the film 100 by one frame (“state F”). In this case, the stop position differs between when the frame F9 is positioned at the shooting exposure position by rewinding and when the frame F9 is positioned at the shooting exposure position by winding up because of the effect of backlash. That is, when the first unexposed frame F9 is positioned at the photographing exposure position by rewinding by one frame, the film 10
This means that the frame F9 is not accurately located at the shooting exposure position on the assumption that 0 is rolled up.

On the other hand, in this embodiment, after the first unexposed frame F9 is completely fed, the frame F9 is positioned at the photographing exposure position by rewinding by 2 frames and rewinding by 1 frame. Therefore, the frame F9 is accurately positioned at the shooting exposure position, and re-shooting can be started without waste from the first unexposed frame F9. Further, in the present embodiment, the frame F9 is positioned at the photographing exposure position by rolling up by one frame.
The frame winding can be performed in common with the normal post-shooting processing, and the load on the program is reduced.

Moreover, in the present embodiment, the magnetic head 8
Since the film 7 is retracted from the film 100, the unexposed frame F9 is unwound by 2 frames to rewind the frame, and the frame is wound up by 1, so that an unnecessary mechanical load is not applied and the power is not consumed. It is never used in vain. Further, since the load fluctuation in the winding control for the last one frame is eliminated, the first unexposed frame F
The accuracy of the stop position with respect to the photographing exposure position of 9 can be ensured, and the reliability can be improved.

In this embodiment, after the first unexposed frame F9 is completely fed, the first unexposed frame F9 is positioned at the photographing exposure position by rewinding by two frames and winding up by one frame. However, the first unexposed frame F9 may be positioned at the photographing exposure position by, for example, rewinding by 1.5 frames and winding up by 0.5 frames.

Further, in this embodiment, the value of the film counter storage variable FCNT is only incremented in step S138, and is changed at all after the time when the reproduction of the magnetic information is not recognized in the determination of step S137. Not done. That is, after the time when the reproduction of the magnetic information is not recognized in the determination of step S137, the change of the count value of the film counter is prohibited.

By prohibiting the change of the count value of the film counter, a series of film drive control from [state C] to [state F], that is, one frame winding,
During the movements such as rewinding by two frames and winding up by one frame, the value of the film counter does not change on the display, and the user's confusion due to the increase or decrease of the displayed value of the film counter can be avoided. In addition, it is possible to omit a wasteful program process and obtain a film count value that matches the final shooting preparation position.

That is, the [state F] of FIG. 1, which is the position where the film 100 is finally stopped in the shooting preparation state.
Is the same as [State C] in FIG. 1 at the time when the last frame F8 having magnetic information is passed, and in the series of film drive control from [State C] to [State F], By not increasing or decreasing the value of the film counter, it is possible to avoid apparent confusion that the displayed value of the film counter increases or decreases and finally reaches the final value. It is possible to omit and obtain a film count value that matches the final shooting preparation position.

Note that step S, which is the branch destination when the timeouts provided at various places in the flowchart have expired.
In the processing of 191, the three motors 61 (M1), 62 (M2), 88 (M) are processed in steps S191 to S193.
Open all 3) to at least prevent the motor from turning around.

Further, in this embodiment, the magnetic head 87 is retracted from the film 100, and then two frames are rewound for retrieving the unexposed frame F9.
Although the frame is wound up, the magnetic head 87 may be retracted from the film 100 after rewinding by two frames and wound up by one frame. That is, even if the retracting operation of the magnetic reproducing head 87 from the point o to the point p on the timing chart shown in FIG. 8 is moved immediately after the point t, that is, when the driving in the rewinding direction for two frames is completed. Good. In this case, the microcomputer MCU has steps S151 to S15 in FIG.
The processes up to 4 are executed immediately after step S169 in FIG. Also by doing this, it is possible to eliminate the load fluctuation in the winding control for the last one frame, to ensure the accuracy of the stop position with respect to the shooting exposure position of the first unexposed frame F9, and improve the reliability. be able to.

[0058]

As is apparent from the above description,
According to the first aspect of the present invention, while the magnetic reproducing head is held at the position where the magnetic reproducing head is in close contact with the film, the film which has been photographed halfway is driven in the winding direction, and one frame is not passed to the photographing exposure position of this film. Each time it is detected, it is determined whether or not the recording information is written on the magnetic track corresponding to the frame, and the winding drive is continued until it is determined that the recording information is not written, and the recording information is written. If not, the magnetic reproducing head is moved to the position where it is retracted from the film, and is rewound, for example, by 2 frames (a predetermined amount is added to 1 frame), and then 1 frame (predetermined amount). By being wound up, the first unexposed frame is located at the shooting exposure position, that is, after the magnetic reproducing head is retracted from the film, it is not exposed. Since rewinding for frame cueing and hoisting is performed, without imposing unnecessary mechanical loading, is not the power is wasted. Further, since the load fluctuation in the final winding control is eliminated, the accuracy of the stop position with respect to the shooting exposure position of the first unexposed frame can be ensured, and the reliability can be improved.

According to the second aspect of the invention, while the magnetic reproducing head is held in the position where the magnetic reproducing head is in close contact with the film, the film which has been photographed halfway is driven in the winding direction, and the film is exposed to the photographing exposure position. Each time the passage of one frame is detected, it is determined whether or not the recording information is written on the magnetic track corresponding to the frame, and the winding drive is continued until it is determined that the recording information is not written. It If it is determined that the recording information has not been written, for example, it is rewound for 2 frames (the amount added to the 1 frame by a predetermined amount), and then the magnetic reproducing head is moved to a position for retracting from the film, and then 1 frame is moved. Since the first unexposed frame is positioned at the shooting exposure position by being wound (a predetermined amount), that is, the magnetic reproducing head is retracted from the film, and then winding is performed to locate the unexposed frame. It is possible to eliminate the load fluctuation in the winding control of (1), ensure the accuracy of the stop position with respect to the shooting exposure position of the first unexposed frame, and improve the reliability.

A third aspect of the invention is the first or second aspect of the invention, in which the predetermined amount in the reloading control means is one frame or less, and has the same effects as the first and second aspects. According to a fourth aspect of the invention, in the first or second aspect of the invention, the passage of each frame to the photographing exposure position is recognized by detecting the passage of the perforation provided at the position corresponding to each frame. So the first
In addition to the effects of the invention and the second invention, it is possible to detect the passage of each frame with respect to the photographing exposure position with a simple configuration without providing a complicated position detection mechanism.

[Brief description of drawings]

FIG. 1 is a schematic diagram showing a film feeding state controlled by a microcomputer MCU shown in FIG.

FIG. 2 is a diagram showing a structure of a film used in a camera to which the present invention is applied.

FIG. 3 is a diagram schematically showing a part of a mechanism of a camera that uses the film and the cartridge shown in FIG.

FIG. 4 is a block diagram showing an electric circuit configuration of this camera.

FIG. 5 is a flowchart showing a specific processing operation performed by the microcomputer MCU of this camera.

FIG. 6 is a flowchart following FIG. 5;

FIG. 7 is a flowchart of an interrupt process performed by the microcomputer MCU.

FIG. 8 is a timing chart of each unit controlled by a specific processing operation performed by the microcomputer MCU.

[Explanation of symbols]

151 ... Cartridge, 100 ... Film, F ... Frame, D ... Magnetic track, P ... Perforation, 51
… Winding spool, 52… Rewinding fork, 61
(M1) ... Winding motor, 62 (M2) ... Rewinding motor, 71 ... Aperture part, 72 ... Upper rail, 73 ...
Lower rail, 74 ... Aperture, 81 ... Pressure plate, 82, 8
4 ... Aperture, 85 (PR1) ... Photoreflector, 87
… Magnetic head, 88 (M3)… Head retracting motor, MC
U ... Microcomputer, U1, U2, U3 ... Motor driver circuit, U4 ... Head reproduction signal amplification circuit, H1 ...
Magnetic reproducing head coil.

Claims (4)

[Claims] 1. A winding drive means for driving a loaded film in a winding direction, a rewinding drive means for driving the film in a rewinding direction, and a passage of each frame of the film to a photographing exposure position. A frame passage detecting means for detecting; a magnetic reproducing head for reproducing recorded information on a magnetic track provided corresponding to each frame of the film while the frame passes through the photographing exposure position; Head advancing / retreating driving means for selectively moving the reproducing head to a position in which the reproducing head is closely attached to the film and a position in which the reproducing head is retracted from the film; and when the cartridge in which the film is photographed halfway is reloaded, The first unexposed frame of the film is controlled by controlling the driving means, the rewinding driving means and the head advancing / retreating driving means. And a reloading control unit that is positioned at a photographing exposure position, the reloading control unit driving the winding drive unit while holding the magnetic reproducing head in a position in which the magnetic reproducing head is in close contact with the film to pass the frame. Each time the detecting means detects the passage of one frame of the film, it is judged based on the output of the magnetic reproducing head whether or not the recording information is written on the magnetic track corresponding to the frame, and the recording information is recorded. The winding drive is continued until it is determined that the recording information has not been written, and after it is determined that the recording information has not been written, the head advancing / retreating drive means is driven to move the magnetic reproducing head to a position where it is retracted from the film. In addition, the rewinding drive means is driven to rewind the film by a predetermined amount in one frame, and thereafter, the winding drive means. By winding up the predetermined amount of the film is driven, film loading control apparatus characterized by positioning a first unexposed frame to the imaging exposure position. 2. A winding drive means for driving the loaded film in a winding direction, a rewinding drive means for driving the film in a rewinding direction, and a passage of each frame of the film to a photographing exposure position. A frame passage detecting means for detecting; a magnetic reproducing head for reproducing recorded information on a magnetic track provided corresponding to each frame of the film while the frame passes through the photographing exposure position; Head advancing / retreating driving means for selectively moving the reproducing head to a position in which the reproducing head is closely attached to the film and a position in which the reproducing head is retracted from the film; and when the cartridge in which the film is photographed halfway is reloaded, The first unexposed frame of the film is controlled by controlling the driving means, the rewinding driving means and the head advancing / retreating driving means. And a reloading control unit that is positioned at a photographing exposure position, the reloading control unit driving the winding drive unit while holding the magnetic reproducing head in a position in which the magnetic reproducing head is in close contact with the film to pass the frame. Each time the detecting means detects the passage of one frame of the film, it is judged based on the output of the magnetic reproducing head whether or not the recording information is written on the magnetic track corresponding to the frame, and the recording information is recorded. The winding drive is continued until it is determined that the film has not been written, and after it is determined that the recording information has not been written, the rewinding drive unit is driven to rewind the film by a predetermined amount in one frame. After that, the head advancing / retreating driving means is driven to move the magnetic reproducing head to a position retracted from the film, and the winding driving means. By winding up the predetermined amount of the film is driven, film loading control apparatus characterized by positioning a first unexposed frame to the imaging exposure position. 3. The film loading control device according to claim 1, wherein the predetermined amount in the reloading control means is one frame or less. 4. The frame passage detecting means according to claim 1, wherein the frame passage detecting means detects passage of a perforation provided at a position corresponding to each frame, thereby recognizing passage of each frame with respect to a photographing exposure position. A film loading control device characterized by: