JPH03202829A - Information recording/reproducing device for camera - Google Patents

Abstract

PURPOSE:To keep the characteristic deterioration of a magnetic head to a minimum by detecting the area of a film where a magnetic recording medium is installed and also identifying the used state of the film and making the magnetic head abut on the recording medium only if necessary. CONSTITUTION:A solenoid 22 is energized, and the magnetic head 15 is made to abut on a magnetic track 39 corresponding to the frame. And then, the action of feeding the film 12 is started, and information on an exposed photographic frame, for example, a date, a time and a photographing condition, etc., are recorded on the magnetic track 39 through the magnetic head 15. And perforation counting for one frame feeding is performed, and it is decided whether or not the frame feeding is finished based on the perforation counting. When the frame feeding by the amount of one frame is finished, a count value in a film counter is added by one, and the action of feeding the film is stopped. Next, energizing the solenoid 22 is stopped, and the head 15 is made to refuge from the track 39.

Description

DETAILED DESCRIPTION OF THE INVENTION A. Field of Industrial Application The present invention relates to an information recording/reproducing device for a camera that records/reproduces information recorded in a magnetic recording area of a film.

B. Conventional techniques and their problems There are known techniques for cameras to record various information on the loaded film, especially USP 4,864,3.
No. 32 discloses a device for magnetically recording and reproducing information. This information includes information regarding the shooting period, information regarding the photographer, and the like.

It is also possible to rewind the film that has been partially shot, remove it from the camera, and then load the film into the camera again and take pictures. It is necessary to make the frame face the aperture, and in order to do this, it is necessary to record on the film, for example, information about which frame was photographed during the previous rewind. This information is then reproduced when reloading, and based on this information, the film is fed by a predetermined amount so that the first frame in the unexposed area faces the aperture.

In this way, when reloading a film that has been partially shot, it is necessary to replay the information on which frame has been shot, but if a completely new film is loaded, or if all frames are accidentally If already shot film is loaded, there is no need to reproduce this type of information.

By the way, when the above-mentioned information is magnetically recorded on a film, or when such information recorded on a film is magnetically read (reproduced), the magnetic head is moved to the position where the information was recorded. However, if the magnetic head is kept in constant contact with the recording medium within the shell, there is a risk that the characteristics of the head will deteriorate.

Furthermore, as a new film cartridge, USP 4
, 834, 306, there is a cartridge in which the film is fed out by externally rotating the shaft around which the film is wound. If the magnetic head is always in contact with the film, the magnetic head may become an obstacle in the process of feeding the film out of the cartridge.

A technical problem of the present invention is to bring the magnetic head into contact with a predetermined position of the film only when necessary.

Means to solve C1 issue A camera information recording/reproducing device according to the present invention.

A film feeding means for winding the film loaded in the camera onto a film winding Lisbourg, a magnetic head for recording/reproducing information by contacting a magnetic recording medium attached to the film in advance, and recording of the film. A detection means for detecting an area to which a medium is attached, an identification means for identifying the usage state of the loaded film, and a magnetic head brought into contact with the magnetic recording medium according to the detection output of the detection means and the identification output of the identification means. and information recording/reproducing means for reproducing information recorded on the magnetic recording medium and/or recording information on the magnetic recording medium in accordance with the magnetic head contact operation by the drive control means, This solves the above technical problem.

The 01 action drive control means brings the magnetic head into contact with the magnetic recording medium in accordance with the output of the detection means for detecting the area of the film to which the recording medium is attached and the output of the identification means for identifying the state of use of the film. This makes it possible for the magnetic head to face the magnetic recording medium and to bring the magnetic head into contact with the magnetic recording medium only when it is necessary to record/reproduce information.

E. Embodiment 1 First Embodiment A first embodiment of the present invention will be described with reference to FIGS. 1 to 5b.

FIG. 1 shows a conceptual diagram of the present invention.

The film position detection section 4 detects the position of the film fed by the film feeding section 5, and the head storage setting drive section 3 drives the blade to hit the film at a predetermined position according to the detection result. Let them come into contact with you.

The information recording/reproducing section 2 records and reproduces information using the magnetic head 1 in contact with the information recording/reproducing section 2 .

FIG. 2 is an overall configuration diagram showing the first embodiment.

As described above, the film cartridge 11 containing the film 12 is fed out by rotating its central axis from the outside.
A perforation 13 is provided in the upper part. A photointerrupter 14 detects the number of times the film 12 passes through the perforations 13 as it is fed.

The detection result of the second photointerrupter 14 is converted into information by a photoelectric conversion circuit 28.

The magnetic head 15 connects the perforations 13 of the film 12 so that information can be recorded and reproduced on the film 12.
It is arranged so that it can be contacted at the end opposite to the end.

That is, the magnetic head 15 is attached to a head alignment plate 16 attached to a head holding lever 17, and the head holding lever 17 is rotatable about a shaft 18 that is the center of rotation. Reference numeral 27 denotes a magnetic head drive circuit that records information in a recording area (described in detail later) of the film 12 via the magnetic head 15 and reproduces information from this recording area.

Further, a spring 20 is hooked between a pin 19 embedded in the head holding lever 17 and a fixed shaft 21.
the counterclockwise direction, i.e. head 15 to film 12
It is biased in the direction of contact. Furthermore, a driving solenoid 22 is connected to the head holding lever 17, and the driving of this solenoid 22 is controlled by a solenoid driving circuit 25. The motor 23 is for rotating the central shaft of the cartridge 11 in order to send out the film 12 from the cartridge 11, and is driven and controlled by a motor drive circuit 26.

The above-mentioned solenoid drive circuit 25 and motor drive circuit 26
．． The magnetic head drive circuit 27 and the photoelectric conversion circuit 28 are each controlled by the CPU 24.

In addition, the CPU 24 includes switches SWI, SW2, and SW3.
are connected to each other, and the details of these operations will be described later.

FIG. 3 is a diagram for explaining the movement of the film 12, position detection, and magnetic recording operations.

FIG. 3(a) shows the state in which the leading end of the film 12 is fed out from the cartridge 11.

Here, 31 is an aperture on the camera side, 32 is an outer rail 32 for a film guide, 33 is a position of a photo interrupter 14 arranged for film position detection, and 34 is a magnetic head 15 for information recording/reproducing. It shows the position of.

FIG. 3(b) shows the film 12 being further fed out of the cartridge 11 and reaching a state where the information magnetically recorded on the film 12 can be reproduced. Here, it is assumed that information regarding the film 12 is recorded on a magnetic track (magnetic recording medium) 36, and the portion having this magnetic track 36 is considered to be separate from the photographic screen. Note that the length of the magnetic track 36 in the longitudinal direction of the film does not need to be the same as that of the photographing screen 37.

The information about the film recorded on the magnetic track 36 may be film-specific information (recorded during film manufacturing) such as the film's ISO sensitivity or the number of shots it can take, or it may be film-specific information (recorded at the time of film production), or it may be film-specific information such as the film's ISO sensitivity and the number of shots that can be taken. Information indicating that it was rewound and taken out (recorded on the camera side)
etc.

The photographing screen 37 for the first frame is located after the portion where the magnetic track 36 is arranged. Also film 1
A magnetic track 39 is provided corresponding to the photographing screen 37 of each frame on 2, on which information specific to that frame is recorded.

FIG. 3(C) shows a state in which the film 12 has been rewound into the cartridge 11 after photographing has been completed. In this winding operation to the cartridge 11, the magnetic track 36
Information about one roll of film is recorded in 0. For example, as mentioned above, this may be information when shooting is not completed until the end, or the range of dates in which the film was shot,
It may be the personal name of the photographer. Also magnetic trunk 39
Information regarding each frame of the film (for example, the shooting date and whether or not it has been trimmed) is recorded in the field.

4 and 5a are flowcharts showing the operation of this embodiment, and FIG. 4 shows a portion related to the initial film feeding operation.

In FIG. 4, in step 5401, switch SW
I (Figure 2) shows the ONN human power state. Here, the switch SWI is a switch that is turned on when the back cover (not shown) is closed after loading the cartridge 11 into the camera.

When the switch SWI is turned on and an affirmative determination is made in step 5401, energization of the motor 23 is started in step 5402 in order to feed the film 12 from the cartridge 11. This energization of the motor causes the central shaft of the cartridge 11 to rotate and the film 12 to be fed out.

In step 5403, the number of perforations 13 is counted based on the output from the photointerrupter 14 in order to monitor the movement of the film 12 sent out from the cartridge 11.

Next, in step 5404, it is determined whether the number of perforations <l3 has reached a predetermined value.

The fact that the predetermined value has been reached indicates that the film 12 has been driven so that the tip of the magnetic track 36 on the film 12 faces the magnetic head 15.

If step 5404 is negative, step 5403
If the determination is affirmative, the solenoid 22 is energized in step 5405.
is retracted in the direction of the arrow in FIG. 2, and as a result, the head holding lever 17 is rotated counterclockwise by the bias of the spring 20, and the magnetic head 15 comes into contact with the magnetic track 36 of the film 12 (step 5406). After the head 15 contacts the magnetic track 36, the process waits for a certain period of time in step 5407, and then proceeds to step 8408. This waiting time is
This is the time required for the magnetic head 15 to stably contact the film 12.

In step 5408, the magnetic head drive circuit 27 is operated to reproduce the information recorded on the recording track 36 by the magnetic head 15, and in step 5409, the reproduced data is read. In step 5410, perforation 1 is used to determine the end of recording track 36.
3 is counted, and in step 5411 it is determined whether the count value has reached a predetermined value, that is, whether the film 12 has been driven to a position where the magnetic track 36 passes the magnetic head 15.

A negative determination is made in step 5411, that is, the magnetic track 36
If it is determined that the magnetic head 15 has not yet been passed, the process returns to step 5408 to continue data reproduction, and if an affirmative determination is made, that is, if it is determined that the magnetic head 15 has been passed, the process returns to step 5412. Drive circuit 27
to terminate the data playback operation.

When the reproduction of the information is completed, the number of perforations 13 is counted in step 5413, and in step S414,
It is determined whether the count value has reached a predetermined value, that is, whether the initial feeding has been completed. The initial feeding operation here usually refers to an empty feeding operation for a predetermined number of frames, but in the case of a prewind type camera, it means a winding operation for all frames.

If step 5414 is negative, the process returns to step 5413, and if it is affirmative, that is, the initial feeding operation for the film 12 is completed, the energization to the film motor 23 that stops the film feeding operation is canceled in step 5415, and in step 8416 The power to the solenoid 22 is cut off. As a result, the solenoid 22 protrudes, the head holding lever 17 rotates clockwise, and the magnetic head 15 retreats from the magnetic track 36 (step 5417).

The reason why the magnetic head 15 is retracted from the film 12 is because the actual photographing operation starts from the state where the initial advance of the film is completed, that is, magnetic recording is performed along with photographing (this will be explained in detail later). Since the time interval between these two times is not determined, consideration has been given to preventing the head 15 from being left in contact with the film 12.

FIG. 5a is a flowchart showing operations during photographing and operations after photographing is completed.

Step 5501 indicates a state of waiting for ON input of switch SW2. Here, the switch SW2 is a so-called half-press switch that is linked to the first stroke of the release button. When step 5501 is affirmative, that is, half-press switch SW2 is turned on, the process proceeds to step 5502, where photometry and distance measurement processing are performed by a photometry circuit and a distance measurement circuit (not shown).
In step 5503, the switch SW3 enters an ON input waiting state. Here, the switch SW3 is a so-called release switch that is linked to the second stroke of the release button.

If step 5503 is affirmative, that is, release switch SW3 is turned on, the process advances to step 5504, where exposure processing operation, i.e., photography is performed based on the previous photometry and distance measurement results.Thereafter, in step 5504A, it is determined whether photography has ended or not. If it is negative, it waits until it is affirmed, and if it is affirmed, it proceeds to step 5505. Here, how do you decide when the shooting is finished?

- If it is an eye reflex camera, the judgment can be made based on whether the mirror down or the film movement after the shutter has been completed, and if it is a lens shutter camera, the judgment can be made based on whether the photographing lens has returned to the predetermined initial position. good.

In step 5505, the solenoid 22 is energized, and as a result, in step 5506, the magnetic head 15 comes into contact with the magnetic track 39 corresponding to the piece. After that, in step 5507, the film feeding operation is started, and in step 5
At step 508, information related to the exposed photographic frame, such as date, time, photographing conditions, etc., is magnetically recorded on the magnetic track 39 via the magnetic head 15. Then, in step 5509, a perforation count for one frame advance is executed, and in step 5510, it is determined whether frame advance is complete based on this perforation count.

If it is determined that frame advance for one frame is completed, step 8510A
If it is determined that the process is not completed, the process returns to step 5507 and the above-described operation is repeated. In step 5510A, the count value of the film counter is added by 1, and in step 5510A, the count value of the film counter is incremented by 1.
At 511, the film feeding operation is stopped. Next, in step S5↓2, the solenoid 22 is de-energized, and as a result, in step 5513, the head 15 retreats from the magnetic track 39.

Now, in this embodiment, the film 1 of the magnetic head 15 is
Regarding the timing of contact and retraction with respect to No. 2, although the configuration is such that the contact is made after the exposure operation is completed and the retraction is made when the frame advance of the film is completed, the timing is not limited to this timing. For example, even if the contact is made by recognizing the ON state of the half-press switch SW2, no problem will occur.

However, when configured to contact in conjunction with half-press switch SW2, 0N10FF of half-press switch SW2
Considering that only the operation will be repeated, it is not preferable to leave it in contact until the end of film feeding even if it is turned on, so it is purely linked to the 0N10FF operation of half-press switch SW2. It is better to contact/evacuate.

In step 5514, it is determined whether or not shooting for one film has been completed. If a negative determination is made, that is, it is determined that all frames have not been completed, the process returns to step 5501, and the above process is repeated, and an affirmative determination, that is, all frames have not been completed. If it is determined that the photographing of the piece has been completed, the process advances to step 5515.

In step 5515, the film 12 is rewound,
In step 5516, a perforation count is performed, and in step 5517, the count value of the film counter is subtracted each time one frame is rewound. Next, in step 8518, it is checked whether or not the first frame has been rewound to determine whether the rewinding has ended. If the determination is negative, the operations of steps 5515 to 5518 are repeatedly executed.

If step 8518 is affirmed, step 5519
Proceed to. At this time, the film trailing end of the magnetic track 36 on the film 12 faces the magnetic head 15.

In step 5519, the solenoid 22 is energized.

At step 5520, the magnetic head 15 moves to the magnetic track 36.
come into contact with. In step 5521, a stabilization time is ensured after the magnetic head contacts, and in step 5522, the magnetic head 1
Information is recorded on the magnetic track 36 via the magnetic track 5. The information recorded here is information related to one roll of film, such as the range of shooting dates mentioned above, personal names, and exposure compensation values given to the entire film. .

A perforation count is then performed in step 5523 to detect the end of magnetic track 36. In step 5524, based on this count, it is determined whether the magnetic track 36 is finished, that is, whether the film 12 has been rewound to the position where the film leading end of the magnetic track 36 contacts the magnetic head 15. , if a negative determination is made here, steps 8522-5
The operation of step 524 is repeated, and if an affirmative determination is made, the process proceeds to step 5525 to cut off the energization of the solenoid 22, and in step 8526, the magnetic head 15 is moved to the magnetic track 36.
evacuate from. Here, a timer wait for a certain period of time is provided in step 5527, but this is for film 1.
2 corresponds to a sufficient time for the cartridge 11 to be wound up.

In this embodiment, the magnetic head 15 is retracted from the film 12 immediately after the recording of information for one film is completed.
The order of steps 5527 and 5527 may be reversed, and the magnetic head 15 may be retracted after the film 12 is wound onto the cartridge 11.

FIG. 5b shows an example of the operation of a prewind type camera in relation to the film rewinding operation of FIG. 5a. Therefore, the steps before step 5505 are omitted as common operations, and the same steps are given the same step numbers.

When the exposure operation is completed in step 8506, step 5
In steps 507 to 5510, film frame feeding operations and information recording operations regarding the shooting frames are performed. However, in the case of a prewind type camera, this film frame advancing operation means that the film is driven in the direction in which it is wound around the cartridge.

When an affirmative determination is made in step 5510 and the frame advance operation is completed, it is determined in step 5514 whether the frame is the final frame, that is, whether it is the photographic screen closest to the cartridge side.

If a negative determination is made here, the process returns to step 5501, which is a routine for photographing, and if a positive determination is made, the process proceeds to step 5522.In steps 8522 to 5524, information recording equivalent to the content shown in FIG. 5 is performed. be exposed.

When the information recording is completed and step 5524 is affirmed, the head 15 is retracted from the magnetic track 36 of the film 12 through the operations of steps 8525 to 5527.
After a certain period of time, the film 12 is wound into the cartridge 11 and the operation is completed.

As described above, the feature of the prewind camera shown in FIG. 5b is that the head 15 is retracted from the -degree film 12 after photographing the final frame and recording information for that frame as the film is fed toward the cartridge. In this way, information for one film can be recorded continuously without any additional steps. This takes full advantage of the characteristics of film feeding in the prewind system, and as a result, there is no need to intentionally bring the head into contact when recording information for one roll of film. It's convenient.

1. Second Embodiment A second embodiment of the present invention will be described with reference to FIGS. 6 to 10.

FIG. 6 shows an example of a film suitable for illustrating another embodiment of the invention. This is designed to enable clear identification of the area in which information about one roll of film is recorded and the area in which images are actually recorded by photographing operations.

FIG. 6(a) shows the state in which the film 12 is pulled out from the cartridge 11, and the film 12 shows a recording track 63 for recording and reproducing information for one film.
and an information area 61 having.

A first perforation 62 arranged to identify the information area 61, a video area 64 in which an image is formed by an exposure operation, and a second perforation for identifying the video area 64.
perforations 65 and magnetic tracks 66 corresponding to the image area 64, respectively.

FIG. 6(b) shows the state in which the film 12 has been pulled out from the cartridge 11 to the end.

The film 12 is further provided with a third perforation 70 for identifying the end of the film 12. 67 is the final video area, 68 is a second perforation for identifying the video area corresponding to the video area, and 69 is a recording track corresponding to the final video area.

Now, the first perforation 62, the second perforation 65, 68, and the third perforation 70 are shown as examples for convenience in order to explain the present invention in detail, and each of them is It is sufficient that the device has the above-mentioned functions, and there are no restrictions on its position, size, number, etc. Also, the length of the recording track 63 for recording information for one film is as follows.
It is not limited to one frame of the video area.

FIG. 7 shows a part of the aperture of the camera loaded with the above-mentioned film.
1. An outer rail 72 for a film guide, a contact position 73 of a magnetic head for recording and reproducing information, and a position 74 of a photointerrupter for detecting film position are shown. here.

The example shown in FIG. 7 is based on a pre-wind camera.

FIGS. 8a and 8b are diagrams illustrating the concept of the present invention using a film such as that shown in FIG. 6.

Basically, it is the same as the conceptual diagram shown in FIG. 1, but in FIG. 8a, the head position setting drive unit 3. A control section 81 for controlling the film feeding control section 4 is characterized in that the control section 81 controls each of the video area detection section 82 and the information area detection section 84 by inputting signals from the video area detection section 82 and the information area detection section 84. In addition, in FIG. 8b, the control section 81 controls the head position setting section 3 and the film feeding control section 4 based on a signal input from the final position detection section 84.

FIG. 8c shows the configuration of this embodiment, and the same parts as in FIG. 2 are given the same reference numerals.

To explain only the difference, the magnetic tracks 63, 66, and 69 on the film 12 are provided at the top of the film 12, so the magnetic head 15 is positioned at the top accordingly, and compared to FIG. It is located near 11. Furthermore perforation 62, 68.7o
Since the photointerrupter 14 is located at the bottom, the photointerrupter 14 is also located at the bottom.

According to the above-mentioned configuration, it is possible to clearly identify the area where information about one film is recorded and the area where images are recorded by shooting. , it becomes possible to prevent the formation of images by shooting.

For example, among the many types of cameras, there may be ones that do not have the above-mentioned magnetic recording means, but if the film 12 shown in FIG. 6 is used for such cameras, It is possible to prevent images from being formed in the area where information is recorded. In other words, although the camera itself does not perform an operation to record information about one roll of film in that area, for example, a laboratory may record information that replaces it after development is completed, and for that purpose, the image is This is because it is preferable that it is not formed.

FIG. 9 shows a flowchart showing the basic concept of operation in the configuration shown in FIGS. 8a and 8b.

In FIG. 9, when the cartridge 11 is loaded into the camera and the back cover is closed, the switch SWI becomes ○X, and step 5901 is determined to be affirmative.

At step 5902, feeding of the film 12 is started. Next, steps 5903 and 5904 detect the information recording area in which information for one film is recorded, that is, the sixth
The detection operation of the first perforation 62 shown in the figure is performed. Note that details of this detection operation will be described later.

When an information recording area is detected and step 5904 is affirmed, in step 5905 the solenoid 22 is driven to bring the magnetic head 15 into contact with the magnetic track 63 in order to reproduce information from the magnetic track 63. Next, in steps 5906 and 5907, the recorded information is reproduced. Film feeding continues even after the information reproducing operation, and since a pre-wind camera is assumed here, the film 12 is pulled out to the end.

In steps 8908 and 5909, the end of the film 12, that is, the third perforation 70 is detected. The final edge of the film is detected and step 59
When 09 is determined to be positive.

The feeding operation of the film 12 is stopped in step 5909A, and the magnetic head 15 is retracted from the film 12 in step 5910, ending the operation.

FIG. 10 specifically shows the operation shown in FIG. 9.

In step 51001, the switch SW
ON recognition of I is performed. If step 51001 is affirmed, the film feeding operation is started in step 51003, and the pulse count from the photo interrupter 14 is performed in step 51004. When the magnetic recording medium 1) 63 is detected, step 51005 is affirmed. If step 51005 is affirmatively determined, the solenoid 22 is energized in step 51007,
In step 81008, the magnetic head 15 moves to the magnetic track 6.
Contact 3.

Thereafter, the information recorded on the recording track 63 is reproduced in step 51009, pulse counting is performed in step S1 and OIO, and whether or not the count value has reached a predetermined value is determined in step 51011, that is, the first frame (prewind In this method, it is determined whether the video area (corresponding to the final frame) has been detected.

Detection of the image area immediately after the magnetic track 63 is performed by detection of the second perforation, and step 5IO
If II is affirmatively determined, film feeding is continued in step 51012. In step 51013, it is determined whether a pulse has been input from the photointerrupter 14, that is, whether the film 12 has been fed by one frame. If negative, the process returns to step 51012; if positive, step 51014 determines whether the final piece has been detected or not.
In other words, it is determined whether the prewind operation has ended. This determination may be made, for example, by determining whether the number of film frames read from the previous magnetic track 63 matches the film count value, or by determining whether the third perforation 70 is detected. You can judge by

If step 51014 is negative, that is, the final frame has not been reached yet, 1 is added to the count value of the film counter and the process returns to step 51012. If the final frame is detected in step 51016, step 510
At step 17, the film feeding operation is stopped, and at step 5101
8. At 51019, the power to the solenoid 22 is cut off and the head 15 is retracted from the film 12.

FIG. 11a shows the operation of a prewind camera after the final frame, that is, the frame closest to the film leader, has been photographed.

In step Sl 101, it is determined whether or not the photographing of the final frame has been completed. If the determination is affirmative, the solenoid 22 is energized and the magnetic head 15 is brought into contact with the magnetic track 66 in steps 51102 and 51103. After that, film feeding is started in step 51104.

Subsequently, in step 51105, information regarding the final photographic frame is recorded. When this is completed, step 51106 is affirmed, and in step 51107, information regarding one film is recorded. Of course, this is done on the information recording track 63 mentioned above, but at this time, as mentioned above, the magnetic head 15 continues without being evacuated from the film after recording the information of the last photographed frame. In step 51108, it is determined whether or not a pulse has been input by the first perforation. If the determination is affirmative, the information recording operation is ended in step 51109. After that, in steps 51110 to 51113, the cartridge 1 is
1, and the head 15 moves away from the film 12.

FIG. 11b shows a modification of FIG. 11a.

The feature of this embodiment is that instead of recording the information for one film after the information recording of the last photographed frame is completed, the film is passed through the information recording area and the direction of film feeding is reversed. This is what we do. this is,
For example, if you take out a roll of film by rewinding it in the middle without shooting all the way to the end, the information for one roll of film will be recorded, and if you do not shoot the film all the way to the end, the information will be recorded. This is because when the camera is loaded, the information will be reused and used.5 We focused on the replay order at that time.

When the information recording regarding the final photographed frame is completed in step S1.105 and step S51106, step S1.
At 108, a first perforation 62 is installed to detect a magnetic track 63 that records information for one film.
It is determined whether or not there is a Hals input indicating that .

Now, referring to FIGS. 6 and 7, in this state, the first
The perforation 62 of the photo interrupter 14
As a result, the magnetic head 15 is positioned closest to the leading edge of the film on the recording track 63.
will be located.

In steps S11] and 5, the film feeding motor is reversed (in this case, the reversed state indicates the direction in which the cartridge is pulled out), and thereby the magnetic head 1
5 will slide on the recording track 63. Next, in step 51107, information about one film is recorded. Determination of end of information recording (step 51116
) may be determined by the detection of the second perforation 65 or by the end of the recorded information itself.

When the recording of the information is completed, the reverse rotation of the motor is stopped in step S11-17, and then the forward rotation of the film feeding motor is performed in step S118. This moves the film in the direction in which it is wound onto the cartridge.

Regarding the operations of steps S 1 i-1, 9 to 51122, steps S 1110 to 31113 of FIG.
is equivalent to

As with FIG. 11c, attention is paid to the recording direction of information recording on the film, that is, the playback order, as described above.

Fig. 111) shows an example in which the moving direction of the film is changed during recording to obtain a convenient recording direction during playback, but here, the moving direction of the film 12 is set as normal and recording is performed. The idea was to achieve this goal by changing the order of the information itself.

That is, when information recording regarding the final photographed frame is finished in steps 51105 and 51106, step 51123
Now, let's look at the information about one roll of film that we are about to record (this is the information read immediately after loading the film,
(stored in the CPU), and then in step 51124, the recording order of the extracted information is rearranged. After that, steps 5L107 to S11
In step 09, the replaced information is recorded, but since this is the same as described above, the details will be omitted.

If the information whose order has been changed is recorded while rewinding the film 12 in this manner, the information can be reproduced while the film 12 is being pulled out next time.

Fig. 1id and Fig. 12 show eight modified examples focusing on the recording order, so that when the camera plays back the recorded information, it can be reliably played back without depending on the direction of movement of the film. This is what I did.

That is, as shown in FIG. 12, the recording track 6 of this example
3 is divided into areas 63a and 63b, and information regarding one film can be recorded in each area. The area 63a is arranged so that it can be played from the left side, and the area 63b is arranged so that it can be played from the right side.

In the first ID diagram showing the processing procedure, step 5110
When the information recording of the last photographed frame is completed in steps 5 and 51106, the film 1 is
The duty information is extracted 8, and in step 51125, information obtained by mirroring it is expressed separately, and step 5112
In step 6, image information is recorded in the areas 63a and 63b of the magnetic track 63, respectively. This allows information to be reproduced regardless of the direction in which the film 12 moves.

In Fig. 13, it is assumed that the recording direction of information regarding a film core is always in one direction, for example, information on each photographed frame in a pre-wind camera is recorded in six directions, and that the camera records the information in six directions during playback. The following shows the corresponding ones.

Step 51301 indicates a waiting state for inputting the switch SWI, which is turned ON by closing the cartridge lid, and if an affirmative determination is made here, step 51302
Film feeding begins. Thereafter, following the recognition of the information recording area, the head is brought into contact with the film to reproduce the information, but when the reproduction of the information is finished, step 51
In step 309, the order of the reproduced information is reversed within the camera so that it is in the correct order.

- Third Embodiment Next, a third embodiment of the present invention will be described with reference to FIGS. 14 to 16.

In this example, the loaded film is either a new film in which not a single frame has been photographed (hereinafter referred to as "unused film"), or a film in which at least one frame has been photographed in the past (hereinafter referred to as "unused film").
It is designed to identify whether the film is being used or not, and to perform processing according to the identification result.

In other words, in FIG. 14, which is a conceptual diagram of this embodiment, a used/unused identification section 85 identifies whether the loaded film is a used film or an unused film, and inputs the identification result to the control section 81. , the control section 81 controls the head position setting drive section 3 according to the input identification result.

Here, the overall configuration of this embodiment is the same as that shown in FIG. 2, and the film 12 shown in FIG. 3 is used. Furthermore, when rewinding a film that has been partially photographed, information indicating how many frames have been photographed is recorded on the magnetic track 36.

15 and 16 show processing procedures in the film feeding operation immediately after film loading, with FIG. 15 assuming the normal winding method and FIG. 16 assuming the briwind method.

In FIG. 15, when the cartridge 11 is loaded into the camera and the back cover is closed, the switch SWI is turned on, step 51501 is affirmed, and step 51501A is turned on.
Then, feeding of the film 12 is started. Then step 51
At 502, it is determined whether switch SW4 (FIG. 2) is on. This switch SW4 is turned on by the user when the loaded film 12 is a used film. If this switch SW4 is turned off, it is determined that the film 12 is an unused film and the process proceeds to step 81508, and if it is turned on, it is not used. It is determined that it is a film and the process advances to step 51503.

Note that the switch SW4 does not need to be a manual switch as described above, and may be turned on and off on the camera side. To do this, first, when unused film is loaded, information indicating that it has been loaded is recorded on the cartridge, for example. If the information is recorded when the film is loaded, the film is in use, and the switch SW4 is turned on; if the information is not recorded, the film is unused, and the switch SW4 is turned off.

In step 51503, pulse signals from the photointerrupter 14 are counted and the magnetic track 36 is
When the detection operation shown in FIG. 3 is performed and the magnetic track 36 is detected, that is, when the film 12 is fed to a position where the magnetic head 15 faces the tip of the magnetic track 36, step 51504 is affirmed and step Proceed to 51505.

In step 51505, the solenoid 22 is driven to bring the magnetic head 15 into contact with the magnetic track 36, and in step 5
At 1506 and 51507, information is reproduced until the magnetic track 36 reaches its end.

The feeding of the film 12 continues even after the information reproduction ends, and in step 81508, the pulse signal from the photointerrupter 14 is counted to detect the first frame. When the first frame is detected, step 51509 is executed. If affirmative, the feeding of the film 12 is stopped in step 51510, and the magnetic head 15 is retracted in step S15 to end the process.

According to the above, when the loaded film is a used film, the magnetic head 15 comes into contact with the magnetic track 36, and information indicating how many frames have been shot is reproduced, and then the unused film is reproduced. According to the illustrated processing procedure, the film is fed based on the reproduced information until the first frame of the unexposed portion faces the aperture. On the other hand, if the loaded film is an unused film, the above information reproduction is not necessary because shooting is always performed from the first frame.
Therefore, the magnetic head 15 is not brought into contact with the magnetic track 36 and information is not reproduced. In other words, the magnetic head 15 is moved to the magnetic track 36 only when it is necessary to reproduce information.
6.

Next, FIG. 16 shows an example in which the present invention is applied to a prewind camera.

In FIG. 16, when the film 12 is loaded into the camera, the switch SWI is turned on and step 51601 is affirmed, and in step 51602 it is determined whether the switch SW4 is on or off. If it is on, it is determined that the loaded film 12 is a used film and the processes of steps 8902 to 5910 in FIG.

In step 51604, feeding of the film 12 is started, and then in step 51605, the photointerrupter 14 is
The final frame (first frame in the prewind system) is detected by counting the output pulses of , and when the final frame is detected, step 81606 is affirmed and step 51607 is performed.
The feeding of the film 12 is stopped at .

That is, in the same manner as described above, if the loaded film 12 is a used film, the magnetic head 15 is brought into contact with the magnetic track 36 to reproduce information indicating how many frames have been photographed, and to record the remaining frames. If the film used,
Information will not be reproduced.

Furthermore, FIG. 17 and FIG. 18 show the processing procedure of another embodiment, and in addition to identifying whether the film is a used film or an unused film, in the case of a used film, the shooting has been completed up to the last frame. Processing is also performed by identifying whether the film is a used film for which there are no more available frames, or a partially used film for which shots have been taken and there are still available frames.

In FIG. 17, this procedure shows an example of the normal winding method, and when the film is loaded, step 51701 is affirmed, and step 51702 determines whether the film is a used film or a partially used film.

Or identify whether it is an unused film. This may be determined, for example, from the operating state of a manual switch (not shown) that can be switched to 3 positions, or as described above, determined by a switch that can be switched to 3 positions based on the contents recorded on the cartridge. You may.

Then, if it is determined that the film is used, step $1
In step 703, a warning that there are no frames that can be photographed is issued, for example, by a warning device (not shown), and then the process is terminated.

Further, if it is determined that the film is used in the middle, step 517
11 starts feeding the film, and then starts feeding the film at the 15th point mentioned above.
Steps 51503 to 51507 in the figure are performed, and if step 51507 is affirmed, step S l 70
Proceed to step 4. In step 51704, step 5150
In step 6, the last photographed frame reproduced is read from the magnetic track 36, and then in step 51705, the output pulse from the photo interrupter 14 is counted to detect the next frame after this last photographed frame, that is, the first frame of the unexposed area. , and the first frame in the unexposed area is processed in step S170.
If detected at step 6, that is, when this frame faces the aperture, feeding of the film 12 is stopped at step 51707, and the process is terminated.

Furthermore, if it is determined in step 51702 that the film is unused, the film is started to be fed in step 51712, and then the processes in steps 51508 to 51511 are performed, and the process is ended with the first frame facing the aperture.

Moreover, FIG. 18 shows an example applied to the prewind method,
First, in steps 51801 and 51802, the same processing as in steps 51701 and 51702 described above is performed. If the film is determined to be used in step 31802, a warning is issued in step S1803 and the process is terminated in the same way as described above. If the film is determined to be partially used, step 590
After performing steps 2 to 5907 (Fig. 9), step 5
In step 1804, the last photographed frame is read, in step 51805, the first frame of the unexposed portion is detected, and in step 81
When it is determined in step 806 that this frame faces the aperture, film feeding is stopped in step 51707, and the process is terminated. However, since a pre-wind camera is assumed here, the first frame of the unexposed portion is one frame closer to the leading edge of the film than the last photographed frame.

Further, if it is determined in step 31802 that the film is unused, feeding of the film 12 is started in step 31808, and then the processing of steps 8908 to 5910 (FIG. 9) is performed, and the process ends.

In the configuration of the above embodiment, the motor 23 and the motor drive circuit 26 function as the film feeding means, and the photointerrupter 14. The photoelectric conversion circuit 28 and the CPU 24 serve as a detection means, the switch SW4 and the CPU 24 serve as an identification means, and the solenoid 22. Solenoid drive circuit 25 and CPtJ
24 constitutes a drive control means, and the magnetic head drive circuit 27 and CPU 24 constitute an information recording/reproducing means, respectively.

Although the above description has been given of a device in which the film is pulled out by rotating the shaft of the cartridge, the present invention can also be applied to a device in which the film is driven by rotating a take-up spool in a camera as usual.

10 Effects of the Invention According to the present invention, the area of the film to which the magnetic recording medium is attached is detected, the state of use of the film is identified, and the magnetic head is moved to the recording medium based on the detection and identification results. Since the magnetic head is in contact with the film, it is possible to contact the film only when the magnetic head is in a predetermined position and when recording or reproducing information is required, minimizing deterioration of the characteristics of the magnetic head. can be suppressed to a minimum. Further, when the film is drawn out by rotating the shaft of the cartridge, the magnetic head does not get in the way when the film is drawn out.

[Brief explanation of drawings]

Figures 1 to 5b show a first embodiment of the present invention;
The figure is a conceptual diagram of the embodiment, Figure 2 is an overall configuration diagram, and Figure 3 (a
) to (C) are diagrams showing the vicinity of the camera aperture and the film, FIGS. 4 and 5a are flowcharts of the processing procedure, and FIG. 5b is a flowchart showing a modification of the processing procedure. 6 to 10 show a second embodiment of the present invention;
Figures (a) and (b) are diagrams showing the film, Figure 7 is a diagram showing the vicinity of the camera aperture, Figures 8a and 8b are conceptual diagrams of the embodiment, Figure 8c is a diagram of the overall configuration, Figure 9 10 are flowcharts of the processing procedure, FIGS. 11a to 1id and 13 are diagrams each showing a modification of the processing procedure, and FIG. 12 is a diagram showing a modification of the film. 14 to 16 show a third embodiment of the present invention, FIG. 14 is a conceptual diagram, FIGS. 15 and 16 are flowcharts of the processing procedure, and FIGS. 17 and 18 are another embodiment. 2 is a flowchart of a processing procedure.

Claims (1)

[Scope of Claims] A film feeding means for winding the film loaded in the camera onto a film winding spool, and a means for recording/reproducing information by contacting a magnetic recording medium attached to the film in advance. a magnetic head; a detection means for detecting an area of the film to which the recording medium is attached; an identification means for identifying the usage state of the loaded film; and a detection output of the detection means and an identification output of the identification means. drive control means for bringing the magnetic head into contact with the magnetic recording medium in accordance with the drive control means; and reproduction of information recorded on the magnetic recording medium and/or reproduction of information recorded on the magnetic recording medium in accordance with the magnetic head contact operation by the drive control means. 1. An information recording and reproducing device for a camera, comprising: information recording and reproducing means for recording information on a camera.