JPH04355438A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera with which pictures can be taken correctly at unexposed frames without requiring a memory for memorizing picture taking conditions. CONSTITUTION:Film feed means 24, 102, 103, 104 for winding and rewinding film, information detecting means 38, 106 for detecting existence of picture taking information with relation to frames in the film passing an aperture in winding the film, position detecting means 37, 108 for detecting if a certain frame is facing the aperture or not, and a control means to continue winding and detection of picture taking information when the picture taking information corresponding to the frame passing the aperture at the time of winding, stopping winding when the picture taking information is not detected, and stopping feed of the film when the frame getting to face the aperture is detected by the detecting means after rewinding the film to face the frame with the aperture are provided.

Description

[Detailed description of the invention]

0001

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera which detects the presence or absence of photographing-related information on each frame of a film, thereby allowing unexposed frames to face an aperture for photographing.

0002

2. Description of the Related Art There are cases where a partially photographed film is rewound into a cartridge, taken out, and then loaded into a camera again for use. When such a partially removed film is loaded again, it is necessary to place the first unexposed frame opposite the aperture. Therefore, it is necessary to record shot information for the film frames that have been shot.
A camera has been proposed that detects the presence or absence of photographed information when reloading, and automatically causes the first frame for which photographed information is not recorded to face the aperture. According to this, it is possible to prevent multiple exposure when using a film taken out halfway, and it is also possible to prevent wastage of the film.

0003

[Problems to be Solved by the Invention] By the way, in order to be able to photograph unexposed frames based on the photographed information, it is necessary, for example, to wind the film once to the final frame when loading the film cartridge, and then A conceivable method is to detect the presence or absence of photographed information for a frame, store the photographing status of all the frames, and then, based on this memory, set predetermined unexposed frames to face the aperture. However, this method requires memory to store the shooting conditions for each frame, which increases costs.For example, if the power battery dies while the camera is in use, all the contents of the memory will be erased. Therefore, even if a new battery is loaded, it becomes impossible to locate the unexposed frames.

An object of the present invention is to provide a camera that can accurately photograph unexposed frames without requiring a memory for storing photographing conditions.

[0005]

[Means for Solving the Problems] The present invention is capable of loading a film on which photographing-related information is recorded into a photographed frame, and by detecting the presence or absence of this photographing-related information, unexposed frames are removed from the camera. -Applicable to cameras that are designed to take pictures while facing the camera. The invention of claim 1 includes a film feeding means for winding and rewinding the film, and an information detecting means for detecting the presence or absence of photographing-related information regarding frames passing through an aperture of the film when the film is wound. , a position detection means for detecting whether a frame of the film faces the aperture; and a position detection means for detecting whether or not a frame of the film faces the aperture; While film winding and photography-related information detection continues, if photography-related information corresponding to a frame passing through the aperture is not detected, film winding is stopped and the frame is moved to face the aperture. The above-mentioned problem is solved by a control means for rewinding the film so that the frame is facing the aperture, and for stopping the film feeding when the detection means detects that the frame is opposed to the aperture. The invention of claim 2 also provides the film feeding means, an information detecting means for detecting the presence or absence of photographing-related information regarding a frame passing through an aperture of the film when rewinding the film, a position detecting means, and a film feeding means. If shooting-related information corresponding to a frame passing through the aperture is detected during rewinding, film rewinding and detection of shooting-related information are continued, while shooting corresponding to the frame passing through the aperture is detected. If the relevant information is not detected, film rewinding is stopped and the film is wound so that the frame faces the aperture, and the detection means detects that the frame faces the aperture. and a control means for stopping film feeding, thereby solving the above problem.

[0006]

[Operation] (1) Invention of Claim 1 This invention is applied to a camera that adopts a normal wind system, and the control means detects photographing-related information corresponding to a frame passing through an aperture during film winding. If so, continue winding the film and detecting shooting-related information. On the other hand, if photographing related information corresponding to the frame passing through the aperture is not detected, film winding is stopped and the film is rewound so that the frame faces the aperture. Then, when it is detected that the frame faces the aperture, film feeding is stopped. As a result, it is possible to take pictures with unexposed frames without using the above-mentioned memory and without performing multiple exposures. (2) Invention of Claim 2 This invention is applied to a camera that employs a prewind system, and the control means controls the opening when rewinding the film.
If photographing-related information corresponding to a frame passing through the camera is detected, rewinding of the film and detection of photographing-related information are continued. On the other hand, if photographing related information corresponding to the frame passing through the aperture is not detected, film rewinding is stopped and the film is wound so that the frame faces the aperture. Then, the piece is
When it is detected that the camera is facing the camera, film feeding is stopped. This provides the same effect as described above.

[0007] In the section of the means and effects for solving the above-mentioned problems that explains the structure of the present invention, figures of embodiments are used to make the present invention easier to understand. It is not limited to.

[0008]

[Embodiment] An embodiment of the present invention will be explained with reference to FIGS. 1 to 24. FIGS. 2(a), 2(b), and 2(c) are views showing a film cartridge loaded into a camera according to the present invention. This cartridge 10 is described, for example, in U.S. Pat. No. 4,832.
, No. 275, and consists of a spool 12 on which a film 11 (FIG. 8) is wound, and a cylinder 13 forming a film storage space (not shown). , a protruding lip portion 13a is provided. The leading end of the film 11 is taken into the cartridge 10 from the beginning, and by rotating the spool 12, the film is fed out or rewound from the lip portion 13a.

This cartridge 10 also has a mechanism for displaying and identifying the usage status of the film 11, similar to the cartridge disclosed in Japanese Patent Application No. 2-189994 by the present applicant. Yes, the display status is displayed on the film usage status display section 14. That is, as shown in FIG. 2, the periphery of the upper end surface of the cartridge 10 is divided into four areas, and the usage status of the film in the cartridge 10 is displayed in the three areas "1", "2", and "3". Display symbols 14a, 14
b and 14c are displayed by printing or the like. On the other hand, an index 12a that rotates according to the movement of the spool 12 is provided, and the spool 12
Display symbols 14a, 14b, 14c depending on the rotation stop position of
Three types of film usage status are displayed.

That is, when the display symbol 14a of "1" is designated (FIG. 2(a)), a completely new, unused (unexposed) film is designated, and when the display symbol 14b of "2" is designated (FIG. 2(b)) refers to one or more films that are taken out from the camera after they have been photographed and have not reached the final frame;
When the display symbol 14c of “3” is indicated (Fig. 2(c))
is configured to display that it is a used (already photographed) film for which photography has been completed up to the final frame.

[0011] In the following embodiment, when taking out part way through, "2" is displayed according to the command, and "3" is displayed when shooting is completed to the last frame and a rewind command is output. The spool 12 is driven and controlled by a camera. Therefore, when the user takes out the film cartridge from the camera, the user can know the usage status of the film in the cartridge 10 from this display. In addition, each display symbol 14a, 14b of the above-mentioned "1", "2", "3",
14c may be, for example, characters such as "Mi", "Du", "Kan", or other numbers/symbols.

Furthermore, inside the cartridge 10, the indication of the film usage state is shifted when the cartridge 10 is used alone, as disclosed in the specification of Japanese Patent Application No. 2-189994 filed by the present applicant. It is assumed that the camera is provided with a mechanism that allows the display of the usage state to be made movable when the cartridge 10 is loaded in the camera. Further, it is assumed that the barrel 13 is provided with a well-known DX code so that the camera can detect the film sensitivity, the number of frames that can be photographed, etc.

FIGS. 3 and 4 show an engaging portion 15 provided on the spool 12 of the film cartridge 10, and a camera-side drive member 21 that is engaged with the engaging portion 15. This embodiment does not have a spline like a normal 135 type cartridge, but has a characteristic shape as shown in the drawing. While the 135 type spline allows for two types of engagement within 360 degrees, this configuration
Engagement is possible only at the rotational position a), and no engagement occurs at other rotational positions. Such engaging portions 15 are provided symmetrically above and below the spool 12 at the same rotation angle position, and when the driving member 21 of the camera engages with the engaging portions 15, the rotation of the spool 12, that is, the film feeding becomes possible. Note that FIG. 4(b) is 180 from FIG. 4(a).
This figure shows how engagement is not possible at the rotated position.

The reason why only one type of engagement is possible within 360 degrees is as follows. As mentioned above, in this embodiment, at the end of rewinding, the spool 12 is controlled to stop at a position corresponding to the state of use of the film (half-taken or used film), but this control is performed by controlling the rotational position of the drive member 21 of the camera. Since it is detected, 135
If two ways of engagement are possible within 360 degrees, such as with mold splines, it is impossible to control the spool 12 to stop at the desired position unless you know which of the two ways it is engaged. be.

Here, as shown in FIG. 2, the cartridge 1
0, there are two windows 16a, 16 approximately 90 degrees apart.
b is formed, from which an engagement surface portion 17 formed at the lower part of the spool 12 and rotating integrally with the spool 12 is exposed. The engagement surface portion 17 is formed of a slope 17a and a non-slope 17b for each half circumference, and the slope 17a and the non-slope 17b are connected to the window portions 16a, 1 depending on the stop position of the spool 12 (the state in which the film is used).
6b is selectively exposed as follows. (1) In state "1", the slope 17a of both the window portions 16a and 16b is exposed. (2) In state "2", the slope 1 is visible from the window 16a.
7a, and the non-slanted surface 17b is exposed from the window portion 16b. (3) In state "3", the non-slanted surface 17b of both the windows 16a and 16b is exposed.

Further, as shown in FIG. 5, the camera 20 includes:
A spring 23a is attached to a corresponding portion of the cartridge chamber 22 through which the window 16a passes when the film cartridge 10 is loaded.
A loading prevention pin 23 energized by the loading direction protrudes so as to be movable forward and backward in a direction perpendicular to the loading direction. Therefore, Fig. 6(a)
, (b), when the slope 17a is exposed from the window 16a, the loading prevention pin 23 is retracted by the action of the slope 17a as the cartridge 10 is inserted, and the loading of the film cartridge 10 is permitted. be done. In addition, the window portion 16
When the non-slanted surface 17b is exposed from a, the non-slanted surface 17b is exposed to the loading prevention pin 2 as the cartridge 10 is inserted.
3, loading of the cartridge 10 is mechanically prevented. In other words, a used cartridge 10 with a ``3'' displayed on the camera 20 is considered unloadable, an unused cartridge 10 with a ``1'' displayed, and a used cartridge 10 with a ``2'' displayed cannot be loaded. The cartridge 10 is loadable.

Next, a camera control mechanism for controlling the rotation stop position of the cartridge spool 12 will be explained. As shown in FIG. 7, the drive member 21 of the camera 20 described above engages with the engagement portion 15 on the lower side of the spool 12 and is rotationally driven by the cartridge drive motor 24. That is, the rotation of the motor 24 is transmitted to the gear 26a via a clutch 25 and a reduction gear mechanism 20 having gears, and the gear 26a, shaft 26b, and drive member 21 rotate together. This rotation causes the spool 12 of the cartridge 10 to rotate, and the film 11 is fed out of the cartridge 10 or rewound into the cartridge 10.

The spring 27A constitutes a well-known retraction mechanism so that the cartridge 10 can be loaded even if there is a phase shift between the engaging portion 15 and the driving member 21 when the cartridge 10 is loaded. The drive member 21 retreats downward along the shaft 26b against the biasing force of the spring 27A. In this way, the cartridge 10 can be loaded even if there is a phase shift, but when there is a phase shift, the cartridge 10 must be loaded against the spring 27A, and loading is slower than when there is no phase shift. It becomes difficult. Note that even in the above-mentioned retracted position, the drive member 21 can rotate integrally with the gear 26a and the shaft 26b. Further, after the film is fed out by the rotation of the spool 12, the film 11 is wound onto the spool 35 (
When winding up as shown in FIG. 9), the rotation transmission between the drive member 21 and the cartridge drive motor 24 is disconnected by the clutch 25.

Further, the rotational position of the driving member 21 is determined by the conductor patterns 27a, 27b, 2 provided on the insulating substrate 27B.
7c, 27d and the sliding brush 28. The insulating substrate 27B is fixed inside the camera 20, while the sliding brush 28 rotates together with the drive member gear 26a, one terminal of which always slides on the conductor pattern 27d, and the other terminal of which is not driven. Depending on the rotational position of the gear 26a, that is, the drive member 21, it is possible to contact any one of the conductor patterns 27a, 27b, and 27c. And conductor pattern 27
The rotational position of the drive member 21 where the sliding brush 28 contacts the a, 27b, 27c is determined by the indication symbol 14a, 14b, 14c, that is, the mark 12a of the cartridge 10.
This corresponds to the positions indicating ``1'', ``2'', and ``3''. Therefore, if the conductor patterns 27a, 27b, and 27c are connected to the input ports of the control circuit 101 (FIG. 1), which will be described later, and the conductor pattern 27d is grounded,
The rotational position of the drive member 21 can be determined by detecting whether the sliding brush 28 has contacted any of the conductor patterns 27a, 27b, and 27c.

Further, a groove 21a is provided in the lower part of the drive member 21 over the entire circumference, and a tip 29 of a position detection lever 29 rotatably supported by a fixing pin 30 is inserted in the groove 21a.
a is engaged, and the other end 29b is in contact with the contact piece of the position detection switch SW1. Then, the driving member 21 engages with the engaging portion 15 of the spool 12 of the cartridge 10, and the spring 27
When it protrudes to the upper limit due to the urging force of A, the switch SW1 is turned on, and the drive member 21 and the spool 12
The phase of the engaging portion 15 of the drive member 2 is shifted and the engagement is not performed.
When switch SW1 is pushed down, switch SW1 is turned off. That is, engagement or disengagement between the driving member 21 and the engaging portion 15 of the spool 12 can be detected by turning on/off the switch SW1.

Furthermore, FIG. 8 shows a film 11 used in the present invention. At the top of the film 11, two perforations 11a and 11 are provided for each photographic frame.
b is provided, and a perforation 11a is provided before the first piece, and a perforation 11b is provided after the last piece.
are provided for each. Furthermore, a magnetic recording area 11c coated with a magnetic recording medium is provided at the lower part of the film 11, as disclosed in, for example, Japanese Patent Laid-Open No. 2-136840. Information regarding photography is recorded in this magnetic recording area 11c by a magnetic head, which will be described later. The information recorded includes, for example, the exposure value at the time of shooting, information instructing whether or not to trim (trimming information), shooting information such as the shooting date, and shot information indicating that the frame has been shot. By recording this photographed information, double exposure can be prevented when the partially removed film is used again.

FIG. 9 is a view of the camera from the rear, with the back surface removed. A cartridge chamber 22 into which the cartridge 10 is loaded is provided at one end of the camera body, and a spool chamber 36 which accommodates a film take-up spool 35 is provided at the other end.
An aperture 31 forming an exposure opening is provided between them. Furthermore, an inner rail 32 and an outer rail 33 are provided above and below the aperture 31, respectively, to form a film passage path.

The film take-up spool 35 is connected to the film feed motor 104 (FIG. 1) via a reduction gear mechanism (not shown).
It is connected to and can be rotated by the rotation of this motor 104. Then, the film 11 is transferred to the cartridge 10.
When the film feed motor 104 is rotated in the forward direction after being fed from the film 11 to the film take-up spool 35, the film 11 is pressed against the film take-up spool 35 by the pressure of a film roller (not shown) and is wound up by the film take-up spool 35. .

Further, a photoelectric element 37 such as a photoreflector for detecting the perforations 11a and 11b of the film 11 is arranged above the aperture 31, and a magnetic recording area provided on the film 11 is arranged below. 11c is provided with a magnetic head 38 and a pressure bonding pad 39 for recording various information regarding photography, and the film 11 is sandwiched between the magnetic head 38 and the pressure bonding pad 39 in a state of pressure contact, and when the film 11 is running, Magnetic recording and playback can be performed properly. Here, for example, if the piece indicated by F1 in FIG. 10 is currently facing the aperture, the photoelectric element 37 is located at a position P2 where it detects the perforation 11b of that piece,
Further, the magnetic head 38 is located almost directly below it.

Next, a method for recording information in the magnetic recording area 11c of the film 11 will be explained with reference to FIGS. 10 and 11. Magnetic recording area 1 of each photographic frame of film 11
When recording various information related to photography on 1c, it is desirable that the density of the recorded information be uniform at all locations in order to prevent reading errors that occur during playback. However, when the film 11 is wound by the film feed motor immediately after the shooting of one frame, the rotational speed of the film feed motor does not increase immediately even though voltage is applied to the film feed motor as shown in FIG. Gradually increase the speed. On the other hand, when stopping film winding, when the first perforation 11a is detected, the feed motor is driven on duty to decelerate the rotation of the feed motor, and when the second perforation 11b is detected, the brake is applied. However, the rotation of the feed motor does not stop immediately. Furthermore, when the film feeding motor is driven at a duty ratio, the power supply voltage Vr is repeatedly applied to the drive electrode of the film feeding motor at a predetermined duty ratio, which generates noise. At this time, if information is recorded, an error may occur during recording or reproduction.

In view of the above, information is to be recorded only in the area 11e where the rotational speed of the film feeding motor is constant, as shown in FIG. Then, a region 11 where the rotational speed of the film feeding motor increases.
No recording is performed in area d, and the area 11f where the rotational speed of the film feeding motor is reduced is allocated to an area for recording photographed information. In this case, as shown in the bottom row of FIG. 11, a pulse signal that repeats high and low levels is recorded at a frequency higher than the information recording frequency or at a frequency in a different band.

When the photographed information recorded by such a recording method is reproduced by the above-mentioned magnetic head 38, a pulse signal having a frequency higher than that of the signal frequency of the photographed information or a pulse signal in a different frequency band is detected. If so, it can be determined that the piece has been photographed. Moreover, noise generated when the feeding motor is driven on duty has no effect because the signal information is simply a signal that repeats high and low levels.

Next, the configuration of the control system of the camera 20 will be explained with reference to FIG. 101 has a microcomputer, memories m, I, counters K, M, N,
This is a control circuit having peripheral devices such as a timer T and a flag E, and is connected to each switch and each circuit shown below, and controls the operation of the camera 20 according to a flowchart described later.

The switch SW1 is a position detection switch shown in FIG. 7, and the switch SW2 is a switch composed of the conductor patterns 27a, 27d and the sliding brush 28. Turns on when supporting "1" indicating film. Similarly, the switch SW3 has conductor patterns 27b, 27
d and a sliding brush 28,
It is turned on when the indicator 12a indicates "2" indicating that the film is taken out halfway. The switch SW4 is a switch composed of conductive patterns 27c and 27d and a sliding brush 28, and is turned on when the index 12a indicates "3" indicating a used film.

[0030] Switch SW5 is a half-press switch,
It turns on when a release button (not shown) is pressed halfway. The switch SW6 is a release switch, and is turned on when a release button (not shown) is pushed beyond the half-press position to the full-press position. The switch SW7 is a lid switch, and is turned on when the cartridge lid (not shown) is opened. The switch SW8 is a cartridge detection switch, and is turned on when a cartridge detection member (not shown) detects that the cartridge 10 is loaded into the cartridge chamber 22. switch S
W9 is a mid-rewind switch that is turned on by pressing a mid-rewind instruction button (not shown), and is turned on when the film is rewound before all frames have been photographed.

A motor drive circuit 102 drives the cartridge drive motor 24 described above to feed and rewind the film. That is, when the cartridge drive motor 24 rotates in the normal direction, the film is fed out, and when the cartridge drive motor 24 rotates in the reverse direction, the film is rewound. The motor drive circuit 103 drives the film feed motor 104 in normal rotation to drive the film take-up spool 35 to wind the film. Reference numeral 105 denotes a recording circuit, which records the above-mentioned various information in the magnetic recording area 11c of the film 11 via the above-mentioned magnetic head 38 connected thereto. A reproduction circuit 106 reproduces various information recorded in the magnetic recording area 11c of the film 11 via the magnetic head 38 connected thereto.

Reference numeral 107 denotes a magnetic head driving device which drives the magnetic head 38 back and forth with respect to the film surface, and when recording information on the magnetic recording area 11c of the film 11 and when recording information on the magnetic recording area 11c of the film 11. The magnetic head 38 is brought into contact with the magnetic recording area 11c of the film 11 only when reproducing information contained in the film 11. A photoelectric conversion circuit 108 detects the presence or absence of the film 11 and the perforations 11a and 11b on the film 11 using a photoelectric element 37 (FIG. 9) such as the photoreflector described above. This perforation detection signal is used to count the number of film frames to be fed and to adjust the position of each photographic frame.

A film sensitivity setting device 110 detects film sensitivity information from the DX code of the cartridge 10 and outputs this information as a film sensitivity signal. 1
Reference numeral 11 denotes a shooting number setting device which similarly detects shooting number information from the DX code and outputs this information as a shooting number signal. Reference numeral 112 denotes a photometry device that detects the subject brightness within the photographic screen and outputs this subject brightness as a subject brightness signal. A distance measuring device 113 measures the distance to the subject and outputs the measured distance value as a distance measurement signal. Reference numeral 114 denotes an exposure control device that controls a shutter mechanism and an aperture mechanism (not shown).

Next, the control procedure by the control circuit 101 will be explained based on the flowcharts of FIGS. 12 to 24. FIG. 12 is a main program, and FIGS. 13 to 24 are subroutine programs. When a battery (not shown) is loaded into the camera 20, the main program shown in FIG. 12 starts, and first, in step S1, whether the switch SW2 consisting of the conductor patterns 27a, 27d and the sliding brush 28 shown in FIG. It is determined whether the engaging portion 15 of the spool 12 of the cartridge 10 for which ``1'' is displayed can be engaged with the driving member 21 of the camera. If it is determined that the switch SW2 is off (incapable of engagement), the process proceeds to step S2. Also, switch SW2 is on (can be engaged)
If it is determined that this is the case, the process proceeds to step S5.

In step S2, the cartridge drive motor 24 starts to rotate in reverse (rotation in the film rewinding direction), and in step S3, the drive member 21 of the camera continues to display "1" until the aforementioned switch SW2 is turned on. Wait until the cartridge 10 is driven to a position where it can engage with the engaging portion 15 of the spool 12, and then step S
4, the reverse rotation of the cartridge drive motor 24 is stopped and the process returns to step S1.

On the other hand, in step S5, the cartridge 10 is detected by turning on/off the cartridge detection switch SW8.
It is determined whether or not the cartridge is loaded into the cartridge chamber 22. When it is off, it is determined that it is not loaded and the process goes to step S.
5, and when it is on, it is determined that it is loaded and the process goes to step S6. In step S6, the lid switch SW
7, it is determined whether the cartridge lid (not shown) is opened or closed. When it is on, it is determined that it is open and the process returns to step S5; when it is off, it is determined that it is closed and the process proceeds to step S7. In step S7, the number of shots information recorded in the DX code of the cartridge 10 is transferred to the number of shots setting device 111.
The detected number of photographed images is stored in the memory I. In step S8, the film sensitivity information recorded in the DX code is detected via the film sensitivity setting device 110, and this film sensitivity is stored in the memory m.

In step S9, the position detection switch SW
It is determined whether the cartridge 10 loaded into the cartridge chamber 22 is displayed as "1" or "2" depending on whether the cartridge 10 is displayed as "1" or "2". That is, as explained with reference to FIG. 6, the used cartridge 10 for which "3" is displayed is prevented from being loaded into the cartridge chamber 22, so the currently loaded cartridge 10 is displayed as "1". ” is displayed, or an unused cartridge is displayed, or “2” is displayed, which is a partially removed cartridge. Since the position of the camera driving member 21 is adjusted in steps S1 to S4 described above, "1"
When the cartridge 10 is displayed, the engaging portion of the spool 12 is engaged with the drive member 21 at the same time as loading, and the drive member 21 is not retracted downward, so the position detection switch S
W1 is turned on. On the other hand, in the case where "2" is displayed, the engaging portion of the spool 12 does not engage with the driving member 21, so the driving member 21 is retracted and the position detection switch SW1 is turned off. Therefore, when the position detection switch SW1 is on, the process goes to the unused film routine of step S10, and when it is off, the process goes to the mid-take-out film routine of step S11.

Step S10 is a part showing the operation of the camera on unused film, and is shown in FIGS. 13 and 14.
The details are shown below. First, in step S21 in FIG. 13, the film 11 is sent out from the cartridge 10. The details will be explained with reference to FIG. 15. In FIG. 15, first, in step S41, the cartridge drive motor 24 starts to rotate normally to feed the film 11 from the cartridge 10. That is, when the motor 24 rotates normally, the rotation is transmitted to the gear 26a via the reduction gear mechanism 20, and the gear 26a, shaft 26b, and drive member 21 rotate in a predetermined direction. As the drive member 21 rotates, the spool 12 of the cartridge 10 engaged with it rotates in the same direction, causing the spool 12 to rotate in the same direction.
The film 11 wound around the film 2 is sent out from the cartridge 10.

Next, in step S42, the photoelectric conversion circuit 1
08 until the film 11 is detected by the photoelectric element 37, that is, until the film 11 reaches the position of the photoelectric element 37. When the film 11 is detected, the process advances to step S43. In step S43, the timer T is driven to start counting a predetermined time period slightly longer than the time required for the leading edge of the film 11 to pass through the photoelectric element 109 and reach the film take-up spool 35. In step S44, the process waits until the predetermined time has elapsed, that is, until the timer T times out, and when the time is up, the process goes to step S45. In step S45, the normal rotation of the cartridge drive motor 24 is stopped and the film 11 is
The delivery from the cartridge 10 is stopped.

In step S46, the timer T stops counting, and in step S47, the film feeding motor 104
starts normal rotation, and winding of the film 11 by the film winding spool 35 begins. In other words, the above card
Since the film 11 sent out from the cartridge 10 has reached the take-up spool 35, the take-up spool 35 is rotated to wind up the film 11. Step S48
Now, wait until the perforation 11a is detected by the photoelectric element 37 via the photoelectric conversion circuit 108, and when the perforation 11a is detected, step S49
go to

In step S49, duty driving of the film feeding motor 104 is started to reduce the feeding speed of the film 11 in order to accurately align the aperture 31 with the perforation 11b of the photographic frame. This duty drive is as described above. Next, in step S50, the process waits until the perforation 11b is detected by the photoelectric element 37 via the photoelectric conversion circuit 108, and when detected, the process proceeds to step S51. In step S51, the duty drive of the film feeding motor 104 is stopped to stop the winding of the film 11, and then the process returns to the process of FIG. 13. Here, the fact that the perforation 11b is detected indicates that the first frame faces the aperture 31.

In step S22 of FIG. 13, the counter K
Set the value to 1. This counter K is film 11
This indicates the piece number. In step S23, it is determined whether the midway rewind switch SW9 is on or off, that is, whether or not a midway rewind instruction button (not shown) has been pressed down to instruct midway rewind. If the midway rewind switch SW9 is on (midway rewind instruction), go to step S29;
Otherwise, the process goes to step S24. Step S24
Then, it is determined whether the half-press switch SW5 is on or off, that is, the release button (not shown) is half-pressed. If it is on, the process goes to step S25, and if not, the process returns to step S23.

In step S25, an exposure calculation is performed to calculate the shutter speed and aperture value based on a predetermined exposure control mode using the subject brightness detected by the photometer 112 and the film sensitivity stored in the memory m in step S8. At the same time, the calculated shutter speed and aperture value are stored in the memory m. Next, in step S26, the distance to the subject is measured by the distance measuring device 113, and a photographic lens (not shown) is driven to focus. Step S2
In step 7, it is determined whether the release switch SW6 is on or off, that is, whether the release button (not shown) has been pushed to the fully pressed position. If the release switch SW6 is on, the process goes to step S28 in FIG. If so, the process returns to step S23.

Step S28 is a release routine showing a photographing operation, the details of which are shown in FIG. First, in step S61, the memory m is
Photographing (exposure control) is performed by controlling the shutter mechanism and aperture mechanism of the exposure control device 114 according to the shutter speed and aperture value stored in the camera. Next, in step S62,
Photographing information regarding the photographing, such as the exposure value, trimming information, photographing date and time at the time of photographing performed in step 61, and photographed information indicating that the photograph has been completed are stored in the memory m. In step S63, the magnetic head drive device 107
The magnetic head 38 is driven to advance and press against the magnetic recording area 11c on the film surface. Step S64
Now, normal rotation of the film feeding motor 104 is started, the film take-up spool 35 is rotated, and winding of the film 11 is started.

In step S65, the timer T is driven to start counting a predetermined time until the winding speed of the film 11 by the film feeding motor 104 becomes approximately constant. In step S66, the process waits until the predetermined time has elapsed, that is, until the timer T times out and the winding speed of the film 11 becomes approximately constant, and when the time is up, the process goes to step S67. In step S67, timer T
Then, in step S68, the photographing information (exposure value at the time of photographing, trimming information, photographing information related to photographing such as photographing date and time, etc.) stored in the memory m in step S62 is read out, and the recording circuit 105 and the magnetic head 38 are read out. These photographic information are recorded in the magnetic recording area 11c on the film 11 via the magnetic recording area 11c.

In step S69, the photoelectric conversion circuit 108
perforation 11 by photoelectric element 37 via
It is determined whether or not a has been detected. performance 1
If 1a is detected, the process goes to step S70, otherwise the process returns to step S68 to continue recording the photographing information. In step S70, in order to accurately align the aperture 31 and the perforation 11b of the photographic frame,
Duty driving of the film feeding motor 104 is started to reduce the feeding speed of the film 11.

In step S71, the photographed information stored in the memory m in the aforementioned step S62, in which high and low levels are repeated at high frequency in order to prevent information recording errors, is read out, and the recording circuit 105 and magnetic head 38 are activated. The image is recorded on the recording area 11c on the film 11 through the recording area 11c. In step S72, it is determined whether the perforation 11b is detected by the photoelectric conversion element 37 via the photoelectric conversion circuit 108. If the perforation 11b is detected, the process goes to step S73; if not, the process returns to step S71 to continue recording the photographed information.

In step S73, the duty drive of the film feeding motor 104 is stopped, and winding of the film 11 is stopped. In step S74, the pressing of the magnetic head 38 against the surface of the film 11 by the magnetic head driving device 107 is released, and the magnetic head 38 is retracted from the film 11. In step S75, the counter K is counted up and the process returns to the unused film routine of FIG. According to the process shown in FIG. 16, as the photographing frame is taken, various photographic information and photographed information regarding the frame are recorded in the magnetic recording area 11c of the film 11 as the photographic frame is wound.

In step S30 of FIG. 14, the counter K
and memory I, that is, compare the frame number and the number of shots, and if the frame number is greater than the number of shots, film 11
is determined to be a used film, and the process proceeds to step S31.
Otherwise, the process goes to step S32. In step S31, a counter M is set to 3 for designating a used film, and the process proceeds to step S38. This counter M is for specifying the usage state of the film cartridge 10, and 1 corresponds to an unused film, 2 corresponds to a partially removed film, and 3 corresponds to a used film.

In step S32, it is determined whether midway rewinding is instructed by turning on the midway rewinding switch SW9. If the midway rewind switch SW9 is turned on and midway rewind is instructed, the process goes to step S33; otherwise, the process goes to step S34. In step S33, the above-mentioned counter M is set to 2, which designates the film to be taken out halfway, and the process goes to step S38.

[0051] In step S34, the above-mentioned step S2
4, it is determined whether the half-press switch SW5 is on or off, and if it is on, the process goes to step S35, and if not, the process returns to step S32. In step S35, exposure calculation is performed in the same manner as in step S25 described above, and the calculated shutter speed and aperture value are stored in the memory m. In step S36, the distance to the subject is measured in the same manner as in step S27 described above, and a photographing lens (not shown) is driven to focus. In step S37, similarly to step S27 described above, it is determined whether the release switch SW6 is on or off,
When it is on, the process returns to the release routine of step S28,
When it is off, the process returns to step S32.

On the other hand, in step S23 of FIG. 13, if the midway rewind switch SW9 is turned on and midway rewind is instructed, the process advances to step S29. In step S29, the counter M is set to 1, and the process proceeds to step S38. That is, if step S23 is affirmed, this means that rewinding is performed on an unused film even though no frame has been photographed yet, and in this case, the counter M is set to 1.

In step S38, after the numerical value is set in the counter M in steps S29, S31, and S33,
Processing for rewinding the film 11 into the film cartridge 10 is performed. Details of this rewinding process are shown in FIGS. 17 and 18. First, in step S81 in FIG. 17, the cartridge drive motor 24 starts rotating in reverse to start rewinding the film 11 into the film cartridge 10. In step S82, the photoelectric element 1 is
The presence or absence of the film 11 is determined by 09, and the film 11 is
If there is no film 11, the process remains in step S82, and if there is no film 11, the process goes to step S83. In step S83,
The timer T is driven, and the tip of the film 11 is connected to the photoelectric element 10.
9 and starts counting a predetermined time slightly longer than the time required for the film to be reeled into the film cartridge 10.

In step S84, step S82 is performed again.
Similarly, the presence or absence of the film 11 is determined. This is because when the photoelectric element 109 detects the perforations 11a and 11b, it is determined that the film 11 is not present, so a re-determination is performed here to avoid any errors in this determination. If there is film 11, step S8
6, and if not, go to step S85. Step S
In step S85, it is determined whether the above-mentioned predetermined time has elapsed, that is, whether or not the timer T has timed out. When the time has elapsed, it is determined that the film 11 has been rewound into the film cartridge 10, and the process proceeds to step S87 in FIG. , otherwise the process returns to step S84. Also, step S86
Now, timer T stops counting. That is, since it is determined in step S84 that there is still film 11, the process returns to step S81 and the presence or absence of film is determined again.

In step S87 of FIG. 18, the counter M
It is determined whether the film is unused or not based on whether or not the value is 1. If the counter M is 1 and it is determined that the film is unused, the process goes to step S88; otherwise, the process goes to step S92. In step S88, wait until the aforementioned switch SW2 is turned on, that is, until the drive member 21 of the camera sets the film cartridge 10 to the display state of "1". When the switch SW2 is turned on, the process goes to step S89, and the cartridge drive motor 24 stop reversing. Next, in step S90, the switch SW is switched again similarly to step S88.
Determine whether 2 is on or off. If it is determined that the switch SW2 is on and the film cartridge 10 is in a state where "1" is displayed, the process returns; otherwise, the process returns to step S9.
Go to 1. In step S91, the reverse rotation of the cartridge drive motor 24 is started again, and the process returns to step S88. Here, the state of the switch SW2 is determined twice because the driving member 21 is moved to another position from the first ON determination (step S88) until the motor 24 is completely stopped by the motor stop (step S89). This is because there is a risk that it may have moved.

Further, in step S92, the counter M is 2.
Depending on whether or not the film is taken out midway, it is determined whether the film is taken out midway or not. If the counter M is 2 and it is determined that the film is taken out halfway, the process goes to step S93; otherwise, it is determined that the film is a used film and the process goes to step S97. In step S93,
Until the aforementioned switch SW3 is turned on, that is, the drive member 21 of the camera moves the film cartridge 10 "2".
Wait until the display state is changed to , and when the switch SW3 is turned on, the process goes to step S94. In step S94, the reverse rotation of the cartridge drive motor 24 is stopped. Step S
In step S95, the switch SW3 is turned on again as in step S93.
Determine whether it is on or off. If it is determined that the switch SW3 is on and the film cartridge 10 is in a state where "2" is displayed, the process returns; otherwise, the process returns to step S9.
Go to 6. In step S96, the reverse rotation of the cartridge drive motor 24 is started again, and the process returns to step S93.

Further, in step S97, the process waits until the above-mentioned switch SW4 is turned on, that is, until the camera drive member 21 sets the film cartridge 10 to the display state of "3", and when the switch SW4 is turned on, the process goes to step S98. . In step S98, the reverse rotation of the cartridge drive motor 24 is stopped. In step S99, it is again determined whether the switch SW4 is on or off, similarly to step S97. If it is determined that the switch SW4 is on and the film cartridge 10 is in a state where "3" is displayed, the process returns; otherwise, the process proceeds to step S100. In step S100, the cartridge drive motor 24 starts rotating in reverse again, and the process returns to step S97. The above is the explanation of the rewind routine. When this rewind routine ends, the unused film routine shown in FIGS. 13 and 14 ends, and the process returns to the main program shown in FIG. 12.

Next, details of the intermediate take-out film routine in step S11 in FIG. 12 will be explained. This is shown in detail in FIGS. 19-22. Steps S121 to S126 in FIG. 19 are completely similar to steps S41 to S46 in the film feeding routine in FIG.
1 from the film cartridge 10 to the film take-up spool 35. In step S127, the film feeding motor 104 starts to rotate normally, and winding of the film 11 by the take-up spool 35 is started.

In step S128, the value of the counter N is reset to zero. This counter N is used to count the number of perforations 11a and 11b. In step S129, the perforation 11a or 1 is formed by the photoelectric element 37 via the photoelectric conversion circuit 108.
Wait until 1b is detected, and if detected, step S1
Go to 30. In step S130, the value of the counter N is counted up, and in step S131, it is determined whether the value of the counter N is 2 or not, that is, the perforation 11b is also detected following the perforation 11a (the first frame is opposite to the aperture 31). ). N=
If 2, it is determined that the first frame faces the aperture 31 and the process goes to step S132; otherwise, the process goes to step S132.
Return to 129.

In step S132, the magnetic head 38 is driven by the magnetic head driving device 107 to advance and press against the surface of the film 11, and then in step S133, the value of the counter K is set to 1. The value of this counter K becomes a value indicating the frame number of the film 11, as described above. Next, in step S134 of FIG. 20, the value of the counter N is set to 0.
At the same time, the flag E is reset to 0. Here, the counter N is used to count the number of perforations 11a and 11b as described above, and the flag E is a flag that is set to 1 when it is determined that the image has been photographed.

In step S135, the information regarding the photographing and the photographed information recorded in the magnetic recording area 11c of the film 11 is reproduced via the magnetic head 38 and the reproducing circuit 106. Specifically, information regarding the piece that has faced the aperture 31 and is currently passing through the aperture is reproduced. In step S136, it is determined whether photographing information has been detected, that is, whether a pulse signal having a frequency band higher than or different from the signal frequency of the information regarding photographing has been detected. If detected, step S
If not, the process goes to step S138. In step S137, flag E is set to 1 to indicate that the piece has been photographed.

[0062] In step S138, the above-mentioned step S138
Similarly to 129, the detection of perforations 11a and 11b is determined. When detected, the process goes to step S139,
Otherwise, the process returns to step S135. Step S1
At step 39, the value of the counter N is counted up. In step S140, it is determined whether the value of the counter N is 2, that is, whether the frame position of the film 11 has advanced by one frame. If N=2 (if the next piece faces the aperture)
Go to step S201, otherwise step S13
Return to 5.

In step S201, it is determined whether the flag E is 1, that is, whether the piece that has been rolled up is a piece that has been photographed. If the flag E is 1, it is determined that the piece has been photographed and the process goes to step S205; otherwise, the process shown in FIG.
Go to step S202 of step 1. In step S205,
Count up the counter K (increase the piece number by 1). In step S206, the counter K and memory I are compared, that is, the frame number and the number of shots are compared, and if the frame number is greater than the number of shots, it is determined that the entire number of shots has already been taken. The process advances to step S207, and if not, the process returns to step S134 and repeats the above-described process. In step S207, the count value of counter M is set to 3.
, that is, a value corresponding to the used film, and in step S208, the motor 104 is stopped to stop film winding. Next, in step S209, the magnetic head 38 is retracted, and in step S210, as shown in FIGS.
After performing the rewind routine, the process returns to the process shown in FIG.

On the other hand, if it is determined in step S201 that E is not 1, the frame is determined to be an unexposed frame, and the process proceeds to the frame return routine of step S202 in FIG. In other words, since an unexposed frame has been detected, shooting will begin from this frame, but at this point, this frame is at a position that has passed through the aperture 31 by one frame due to the above-mentioned winding operation, so the film winding is not complete. After stopping, a process of rewinding the unexposed frame by one frame so as to face the aperture 31 is performed in step S202.

Details of the frame return routine in step S202 are shown in FIGS. 23 and 24. First, in step S211 of FIG. 23, normal rotation of the film feeding motor 104 is stopped to stop winding of the film 11. For example, if the frame indicated by F1 in FIG. 10 is an unexposed frame that should face the aperture this time, the photoelectric element 37 is currently located at position P1 after detecting the perforation 11b of the next frame F2. It becomes. In other words, since the duty drive of the motor 104 is not performed before the winding is stopped in step S211, the perforation 11
This is because even if the motor 104 is stopped after detecting b, film winding actually stops only after that.

In step S212, the magnetic head driving device 107 drives the magnetic head 38 to retreat from the film surface. In step S213, the cartridge drive motor 24 is started to rotate in reverse, and the rewinding of the film 11 into the cartridge 10 is started. In step S214, the counter N is reset to zero, and in step S215, the perforations 11a and 11b are detected by the photoelectric element 37 via the photoelectric conversion circuit 108. If detected, the process proceeds to step S216; otherwise, the process proceeds to step S215.
Stay in.

In step S216, the count value of the counter N is incremented, and in step S217, it is determined whether the film 11 has been rewound by one frame or more based on whether the value of the counter N is 4 or not. If step S217 is affirmative, the process advances to step S218; otherwise, the process returns to step S215. Here, at the time when step S217 is affirmed, the photoelectric element 37 is located at a position P2 where it detects the perforation 11a of the piece in front of the piece F1 that is desired to face the aperture. In step S218, a predetermined time period required to further rewind the film 11 by about 1/4 to 1/2 frames is set in the timer T, and time measurement is started. Step S21
In step 9, the process waits until the predetermined time has elapsed, that is, until the time is up, and when it has elapsed, in step S220, the reverse rotation of the motor 24 is stopped to stop rewinding, and at the same time, the time measurement is stopped in step S221.

Next, in step S222 of FIG. 24, the motor 104 is rotated in the normal direction to start winding the film in a winding step S35. In step S223, the process waits until the perforation 11a is detected, and when detected, the motor 104 is driven on a duty basis in step S224. In step S225, the perforation 11b
Wait until it is detected, and when it is detected, step S226
Then, the motor 104 is stopped and film winding is stopped. Thereafter, the process returns to the process shown in FIG.

By the above frame return process, a predetermined unexposed frame (F1 in FIG. 10) can be brought to face the aperture. The reason why the film 11 is rewound by one frame or more and then rewound again so that the frame faces the aperture 31 is to accurately position the frame by performing the above-described duty drive.

In FIG. 21, when the frame rewind routine is completed, it is determined in step S104 whether or not midway rewinding has been instructed by turning on/off the midway rewinding switch SW9. If the midway rewind switch SW9 is on, the process goes to step S204; otherwise, the process goes to step S105. In step S204, the counter M is set to 2 to designate the film to be taken out halfway, and the process goes to step S210 in FIG. In step S210, the film rewinding routine shown in FIG. 15 described above is performed and the process returns to the main program shown in FIG. 12.

In step S105, it is determined whether the half-press switch SW5 is on or off, and if it is on, the process goes to step S106, and if not, the process returns to step S104. In step S106, exposure calculation is performed and the calculated shutter speed and aperture value are stored in the memory m. In step S107, the distance to the subject is measured, and a photographic lens (not shown) is driven to focus. In step S108, it is determined whether the release switch SW6 is on or off, and if it is on, the process goes to step S61, and if not, the process returns to step S104.

Steps S61 to S63 and steps S64 to S70 in FIG. 22 are the operations described in the release routine shown in FIG. 16 above. That is, after taking a picture, the film is wound and the magnetic head 38
Photographing information and photographed information are recorded in the magnetic recording area 11C of the film 11. After step S70, when the perforation 11b is detected in step S203, the process proceeds to step S205 in FIG. 20 described above.

When this mid-take-out film routine is completed, the process returns to step S12 in FIG. 12, and the lid switch SW is
The cartridge lid (not shown) is opened by turning on and off 7.
Determine closure. When it is on, it is determined that it is open and the process goes to step S13; otherwise, the process stays at step S12. In step S13, the cartridge detection switch SW8
The cartridge moves into the cartridge chamber 22 by turning it on and off.
Determine whether or not it has been taken out. When it is off, it is determined that it has been taken out and the process returns to step S1; when it is on, it is determined that it has not been taken out and the process returns to step S12.

The above is the operating procedure of the control circuit 101. According to this procedure, when a partially removed film is loaded into the camera, winding of the film 11 is started in conjunction with the closing operation of the back cover, and in synchronization with this winding operation, the magnetic head 3
8, the presence or absence of photographed information (photographing related information) corresponding to the piece passing through the aperture 31 is detected. If photographed information is detected, winding of the film 11 and detection of photographed information are continued. On the other hand, when the photographed information corresponding to the frame passing through the aperture 31 is not detected, it is determined that the frame is an unexposed frame, and winding of the film 11 is temporarily stopped, and then the film 11 is wound for one or more frames. be returned. Thereafter, the film 11 is wound again, and the unexposed frame is placed in the aperture 31.
When it is detected that the machine is facing the machine, the winding is stopped. As a result, photographing is started from that unexposed frame.

When a release operation is performed in this state, an unexposed frame is photographed, then winding of the film is started, and the magnetic head 38 records photographed information for the photographed frame. Then, even after the winding of one frame is completed, the winding continues, and at this time, the photographed information of the next frame is detected. If photographed information is detected, winding and detection of photographed information continue; if photographed information is not detected, it is determined that the frame is an unexposed frame, and the frame is The film is fed so that it faces the aperture.

Therefore, according to the above, since the unexposed frames can be photographed without double exposure without storing the photographing conditions of all frames, there is no need for memory for storing the photographing conditions, and costs can be reduced, and the camera Even if the power battery runs out while using the camera, you can load a new battery to accurately locate the unexposed frames. In addition, since it detects whether or not each frame has been shot one by one, it is possible to use, for example, film taken out mid-way (there are frames at the leading edge and trailing edge of the film) that was shot with both a normal wind camera and a pre-wind camera. Even in this case, there will be no double exposure.

In particular, in this embodiment, after removing the cartridge 10 from the cartridge chamber 22 of the camera 20 (
After step S7 of FIG. 12 is affirmed), step S1
Returning to Steps S1 to S4, the drive member 21 of the camera moves to the card where "1" indicating unused film is displayed.
Since the cartridge 10 is driven to a rotational position (initial position) in which it can engage with the engaging portion 15 of the spool 12, it becomes easy to load an unused film cartridge 10.

That is, according to the configuration shown in FIG. 7, when the drive member 21 of the camera is in the rotational position where it cannot engage with the engagement portion 15 of the cartridge 10 where "1" is displayed, the cartridge 10 is unused. When attempting to load a film cartridge 10, the drive member 21 will resist the biasing force of the spring 27A and retreat downward, making loading difficult due to the resistance force. 21 is the engaging part 15 of the spool 12
If the rotational phase is such that the cartridge 10 can be engaged with the cartridge 10, the cartridge 10 can be easily loaded by engaging the two at the time of loading.

In the configuration of the above embodiment, the motor 24
, 104 and motor drive circuits 102 and 103 serve as film feeding means, the magnetic head 38 and reproducing circuit 106 serve as information detection means, and the photoelectric element 37 and photoelectric conversion circuit 10
8 constitutes a position detection means, and the control circuit 101 constitutes a control means, respectively.

-Second Embodiment- Next, a second embodiment of the present invention will be described with reference to FIGS. 25 to 31. In the first embodiment described above, when the partially removed film 11 is loaded into the camera, the presence or absence of photographed information (photographing related information) is detected as the camera winds the film, and when the photographed information is not detected, the frame is In the second embodiment, when the film 11 to be taken out halfway is loaded, the film is wound to the final frame, and during this winding, the photographed information of each frame is recorded. The system detects the presence or absence of images and determines the positions of unexposed frames after understanding the shooting status of all frames. Note that the control circuit 101 in this embodiment requires a flag F(K), a memory L, and a counter J in addition to the above-mentioned memory and counter, but these are not particularly illustrated.

FIG. 25 is a diagram showing details of the intermediate take-out film routine (step S11 in FIG. 12) in this embodiment. Step S301 is a usage status determination routine, the details of which are shown in FIGS. 26 to 28. In addition,
The processes before steps S121 to S140 are completely the same as steps S121 to S140 in FIGS. 19 and 20 described above, so some illustrations are omitted. If it is determined in step S140 that N=2, the process proceeds to step S141, where it is determined whether the flag E is 1, that is, whether or not the rolled up piece is a photographed piece. If the flag E is 1, it is determined that the piece has been photographed and the process goes to step S142; otherwise, the process goes to step S143. In step S142, the flag F(K) is set to 1, the Kth frame is set to be a photographed frame, and the process proceeds to step S144. In step S143, the flag F(K) is set to 0, and the Kth frame is set to be an unexposed frame. That is, flag F
(K) is a flag that becomes 1 when the Kth frame is a photographed frame, and becomes 0 when the Kth frame is a frame that has not been photographed.

Next, in step S144, the counter K
Count up (increase the piece number by 1). In step S145, the counter K and the memory I are compared, that is, the frame number and the number of shots are compared, and if the frame number is greater than the number of shots, it is determined that the information for the number of shots has been reproduced, and the process proceeds to step S146. If not, return to step S134 (FIG. 19) and perform steps S134 to S14.
Repeat step 5.

In step S146, the magnetic head driving device 107 drives the magnetic head 38 to retreat from the film surface. In step S147, the timer T is driven to start measuring a predetermined time required to slightly wind the film 11. This predetermined time is slightly longer than the time required to wind up the film 11 by the length of at least one perforation 11b. In step S148, the process waits until a predetermined time has elapsed, that is, until the timer T times out and the film 11 is wound up by the length of one perforation 11b, and when the time is up, the process goes to step S149. As a result, the film has been wound by a smaller amount than when the final frame faces the aperture 31.

In step S149, normal rotation of the film feeding motor 104 is stopped to stop winding of the film 11, and in step S150, time counting by the timer T is stopped. Next, the process proceeds to step S311, where the value of the counter J is set to 1, and in step S312, the flag F(J) is set to 1.
In other words, it is determined whether or not the J frame has been photographed. If the flag F(J) is 1, it is determined that the image has been photographed and the process proceeds to step S313, where the value of the counter J is counted up and the process proceeds to step S314. In step S314, it is determined whether or not the value of the counter J exceeds the value of the memory I, that is, whether or not it is the final frame. If negative, step S312
If the answer is affirmative, the process returns to the process shown in FIG.

On the other hand, in step S312, the flag F(J)
If it is determined that is 0, it is determined that no photographing has been performed and the process proceeds to step S315 in FIG. Here, the value of J at this point indicates the frame number of the unexposed frame closest to the leading edge of the film. In step S315 of FIG. 27, the value of I-J+2 is stored in the memory L. This value is for rewinding the film to the middle of the J-1 frame. Next, in step S151, the value of the counter K is reset to 0, and in step S152, the reverse rotation of the cartridge drive motor 24 is started to start rewinding the film 11 into the cartridge 10. In step S153, the value of the counter N is reset to zero, and in step S154, the value of the photoelectric conversion circuit 1 is reset to zero.
08 until the perforations 11a and 11b are detected by the photoelectric element 109, and when they are detected, the process advances to step S155.

In step S155, the value of counter N is counted up, and in step S156, the value of counter N is incremented.
The film 11 is transferred to the cartridge 10 depending on whether the value of is 2 or not.
It is determined whether or not the frame has been rewound by one frame. If N=2, it is determined that the film 11 has been rewound by one frame into the cartridge 10, and the process goes to step S157; otherwise, the process returns to step S154. In step S157, the value of counter K is counted up.

Next, the process proceeds to step S316, where the value of the counter K and the value of the memory L are compared, and it is determined whether the rewind has been rewound to around the scheduled J-1 frame. If K=L then J-
If it is determined that the rewind has been completed to the vicinity of the first frame, the process proceeds to step S317, and if not, the process returns to step S153. In step S317, the timer T is loaded with another 1/4 frame ~
A predetermined time required to rewind half a frame is set and timing is started. This is because when positioning the J frame, the film is slightly wound up and accelerated for positioning. In step S318, wait until a predetermined time has elapsed, then in step S319 the cartridge drive motor 2
At the same time, the rewinding of the film is stopped by stopping the rewinding of the film in step S320, and the process proceeds to step S160 in FIG. 28.

In step S160, the film feed motor 104 starts to rotate normally, and the film 11 is started to be wound up by the film take-up spool 35. Step S
At 161, the photoelectric element 37 is connected via the photoelectric conversion circuit 108.
The process waits until the perforation 11a is detected by , and when the perforation 11a is detected, the process goes to step S162. In step S162, duty driving of the film feeding motor 104 is started. This is J
This is to reduce the feeding speed of the film 11 so that the perforation 11b of the frame and the aperture 31 can be accurately aligned. In step S163, the process waits until the perforation 11b is detected and the J frame faces the aperture, and when detected, the process proceeds to step S164. In step S164, the film feeding motor 10
4 is stopped, and winding of the film 11 by the film take-up spool 35 is stopped. When step S164 ends, the usage status determination routine ends and the process returns to the process of FIG. 25.

According to the usage state determination routine described above, information on each frame is read by the magnetic head 38 while the film 11 is being wound, and whether or not each frame has been exposed is stored. When the film 11 is wound to the end and the shooting conditions of all frames are memorized, the leading edge of the unexposed frame is detected based on the memory, and the film is rotated so that that frame faces the aperture 31. It is rewound.

After that, returning to the process of FIG. 25, it is determined in step S302 whether or not J>I, that is, whether or not it is the final piece. If affirmative, the process advances to step S305; if negative, step S104 Proceed to. Step S104~
S108 has been explained with reference to FIG. 21 above, so the explanation will be omitted here. If it is determined in step S108 that the release switch SW6 is on, the process advances to release routine A in step S303.

FIGS. 29 to 31 show details of the processing of the release routine A. Steps similar to those in FIG. 16 described above are denoted by the same reference numerals, and differences will be mainly explained. In steps S61 to S69 of FIG. 29, photographing, film winding, and photographing information are recorded, and when it is determined in step S69 that perforation 11a has been detected, a count value J is incremented in step S331. In step S332, it is determined whether J>I, that is, in the step S332.
At 61, it is determined whether or not the photographed frame is the final frame. If affirmative, the process proceeds to step S70 in FIG. 30; if negative, the process proceeds to step S333. In step S333, the flag F(J
) is zero, that is, whether or not the Jth frame (the frame following the frame photographed in step S61) is unexposed. If it is affirmative, the process advances to step S70. In step S70, motor 1
04 duty drive and step S72
Until the perforation 11b is detected, the magnetic head 38 records photographed information in step S71, and when the perforation 11b is detected, the motor 104 is stopped in step S73, and the magnetic head 38 is retracted in step S74. After that, the process returns to FIG. 25.

On the other hand, if it is determined in step S333 that F(J) is not 0, that is, the J frame has been exposed, then
The process proceeds to step S334, and the process continues in step S334 until the perforation 11b is detected in step S335.
to record the information about the shot. When the perforation 11b is detected in step S335, step S3
At step S36, the magnetic head 38 is retracted and the process proceeds to step S337. In step S337, the perforation 11
Wait until a is detected, and if detected, step S33
Count up the count value J at 8 and step S33.
Proceeding to step 9, it is determined whether or not J>I, that is, whether or not it is the final piece. If step S339 is affirmed, step S34
1, and if negative, in step S340 F(J)=
It is determined whether or not it is 0, that is, whether or not the J frame is unexposed.

[0093] If step S340 is negative, the process waits until the perforation 11b is detected in step S344, and once detected, the process returns to step S337 and the above-described process is repeated. On the other hand, if step S340 is affirmed, duty driving of the motor 104 is started in step S341, waits until the perforation 11b is detected in step S342, and when perforation 11b is detected, the motor 104 is stopped in step S343 and the motor 104 is stopped in step S343. Return to step 25.

In step S304 of FIG. 25, it is determined whether J>I, and if it is negative, the process returns to step S104.
If it is affirmative, the memory M value is set to 3 in step S305, and then in step S306, the process shown in FIGS. 17 and 18 described above is
The rewind routine is executed and the process returns to the process of FIG.

[0095] According to the above procedure, when a partially removed film is loaded, the film is once wound up to the final frame, and during this winding, the presence or absence of photographed information for each frame is detected, and the photographing status of all frames is checked. is stored as a flag F(K). Thereafter, the most leading unexposed frame of the film is found based on the stored photographing conditions, and the film is fed so that this frame faces the aperture 31. After that, when the picture is taken, the film is wound, but
During the winding, it is determined whether the next frame is an unexposed frame or not based on the stored contents, and the winding is continued until an unexposed frame appears. When an unexposed frame is found, the frame faces the aperture 31 and becomes ready to be photographed.

In the first and second embodiments described above, for example, in the routine shown in FIG.
In step S136' of FIG. 32, it is determined whether or not the frame has been photographed based on whether photographed information is detected. However, as shown in step S136' of FIG. It may be determined whether the frame has been photographed or not based on whether or not information such as (such as information such as Therefore, the photographing-related information in the scope of the claims shall include such photographing information. However, in this case, there is a possibility that the photographed information will not be reproduced correctly due to various noises generated inside the camera 20 during reproduction, misalignment of the magnetic head 38 with respect to the magnetic recording area 11c where information is recorded, etc. As described above, it is preferable to determine whether the captured information is unaffected by noise or positional deviation of the magnetic head 38 with respect to the magnetic recording area 11c.

[0097] In the above, we have described a camera that uses the normal wind system, but it also applies to cameras that use the prewind system, which winds the film once to the end when loading the film, and then rewinds it one frame at a time each time a picture is taken. The present invention can be applied. In this case, the photoelectric element 37 and the magnetic head 38 are provided on the left side of the aperture 31 (on the right side in FIG. 9, which shows a normal wind camera). The element 37 is the perforation 11a of the piece.
to be detected. Then, as the partially removed film 11 is loaded into the camera and the back cover is closed, the film 11 is wound to the end, and then rewinding is started, and in synchronization with this rewinding operation, the magnetic head 38 is used to The presence or absence of photographed information (photographing related information) corresponding to the piece passing through the chamber is detected. If shot information is detected, rewinding the film 11 and detection of shot information is continued; if shot information is not detected,
It is determined that the frame is an unexposed frame, the rewinding of the film 11 is temporarily stopped, and then the film 11 is wound for one or more frames. Thereafter, the film 11 is rewound again, and when it is detected that the unexposed frame faces the aperture, the winding is stopped. As a result, photographing is started from the most terminal unexposed frame.

When the release operation is performed in this state and the unexposed frame is photographed, rewinding of the film is started, and the magnetic head 38 records photographed information for that frame. Then, even after the rewinding of one frame is completed, rewinding is continued, and at this time, the photographed information of the next frame is detected. If photographed information is detected, rewinding and detection of photographed information are continued; if photographed information is not detected, the frame is determined to be an unexposed frame as described above. The film is fed so that the frame faces the aperture.

[0099] As a result, in a camera that uses the prewind system, it is possible to shoot with unexposed frames without double exposure without having to memorize the shooting conditions of all frames, so there is no need for memory to store the shooting conditions as described above. This reduces costs, and even if the power battery runs out while the camera is in use, unexposed frames can be accurately positioned by loading a new battery.

In the first and second embodiments described above, an example was shown in which it is detected whether or not the film is taken out halfway by using the identification display means of the cartridge, but it is also possible to detect it in other directions. good. Therefore, the present invention can also be applied to cameras using ordinary film cartridges.

[0101]

According to the invention as claimed in claim 1, in a camera that adopts the normal wind method, it is possible to accurately photograph unexposed frames without requiring a memory to store the photographing conditions for each frame. Therefore, costs are reduced and
For example, even if the power battery runs out while the camera is in use, unexposed frames can be positioned by loading a new battery. It can also handle mid-take-out film shot with both normal-wind cameras and pre-wind cameras. Further, according to the second aspect of the invention, the same effects as described above can be obtained in a camera that employs the prewind method.

[Brief explanation of drawings]

FIG. 1 is a block diagram showing a control system of a camera according to a first embodiment of the present invention.

FIG. 2 is a perspective view showing a film cartridge used in this embodiment.

FIG. 3 is a perspective view showing the engaging portion of the cartridge spool and the driving member of the camera.

FIG. 4 is a diagram illustrating the engagement between the engaging portion and the driving member.

FIG. 5 is a perspective view showing the configuration of a cartridge chamber in which a cartridge is loaded.

FIG. 6 is a diagram illustrating cases in which a cartridge can be loaded into the cartridge chamber and cases in which it cannot be loaded.

FIG. 7 is a perspective view illustrating a spool drive mechanism and a display identification state detection mechanism.

FIG. 8 is a diagram showing an example of a film.

FIG. 9 is a diagram showing a perforation detection mechanism and a magnetic recording mechanism of the camera.

FIG. 10 is a diagram illustrating the state of magnetic recording on a film.

FIG. 11 is a time chart showing signal waveforms at various parts during magnetic recording.

FIG. 12 is a main flowchart executed by the camera control circuit.

FIG. 13 is a subroutine flowchart showing details of the unused film routine.

FIG. 14 is a flowchart following FIG. 13;

FIG. 15 is a subroutine flowchart showing details of a film feeding routine.

FIG. 16 is a subroutine flowchart showing details of a release routine.

FIG. 17 is a subroutine flowchart showing details of a rewind routine.

FIG. 18 is a flowchart following FIG. 17;

[Figure 19] Sub-blue showing mid-take film routine
This is a chin flow chart.

FIG. 20 is a flowchart following FIG. 19;

FIG. 21 is a flowchart following FIG. 20;

FIG. 22 is a flowchart following FIG. 21;

FIG. 23 is a subroutine flowchart showing details of a frame return routine.

FIG. 24 is a flowchart following FIG. 23;

FIG. 25 is a subroutine flowchart showing a mid-take-out film routine in the second embodiment.

FIG. 26 is a subroutine flowchart showing a usage status determination routine.

FIG. 27 is a flowchart following FIG. 26;

FIG. 28 is a flowchart following FIG. 27;

29 is a subroutine flowchart showing details of release routine A. FIG.

FIG. 30 is a flowchart following FIG. 29;

FIG. 31 is a flowchart following FIG. 29;

FIG. 32 is a flowchart illustrating a modified example of processing for detecting whether or not photography has been completed.

[Explanation of symbols]

10 Film cartridge 11 Films 11a, 11b Perforation 11c Magnetic recording area 12 Spool 12a Index 13 Cylindrical body 14 Display symbol 20 Camera 21 Drive member 22 Cartridge chamber 23 Loading prevention pin 24 Film feed motor 37 Photoelectric element 35 Film winding Take-up spool 38 Magnetic head 101 Control circuit 104 Film feeding motor 105 Recording circuit 106 Reproduction circuit 108 Photoelectric conversion circuit SW1 to SW8 Switch

Claims (2)

[Claims] [Claim 1] A film on which photographing-related information is recorded can be loaded into a photographed frame, and by detecting the presence or absence of this photographing-related information, unexposed frames are placed opposite the aperture and photographed. A film feeding means for winding and rewinding the film;
Information detection means for detecting the presence or absence of the photographing-related information regarding a frame passing through an aperture of the film when the film is wound; and a position for detecting whether any frame of the film faces the aperture. If the detection means and the shooting-related information corresponding to the frame passing through the aperture are detected during film winding, the film winding and shooting-related information detection continues, while the detection means detects the shooting-related information corresponding to the frame passing through the aperture. If no corresponding shooting related information is detected,
Stop film winding and rewind the film so that the frame faces the aperture.
and control means for stopping film feeding when the detection means detects that the camera is facing a film. [Claim 2] A film on which photographing-related information is recorded can be loaded into the photographed frame, and by detecting the presence or absence of this photographing-related information, the unexposed frame is placed opposite the aperture and photographed. A film feeding means for winding and rewinding the film;
information detecting means for detecting the presence or absence of the photographing-related information regarding a frame passing through an aperture of the film when rewinding the film; and detecting whether or not any frame of the film faces the aperture. If the position detection means and the shooting-related information corresponding to the frame passing through the aperture are detected during film rewinding, film rewinding and detection of shooting-related information are continued while the frame passing through the aperture is detected. If the shooting-related information corresponding to the piece to be played is not detected,
Stop film rewinding and wind the film so that the frame faces the aperture.
and control means for stopping film feeding when the detection means detects that the camera is facing a film.