JPH07114095A - Camera - Google Patents

Abstract

PURPOSE:To surely perform a cleaning operation even when a cleaning cartridge is reused in a camera where a magnetic head is cleaned by automatically performing the winding and rewinding of film when the cleaning cartridge is mounted in the camera. CONSTITUTION:The camera discriminates whether cartridges 2a and 2b are the cleaning cartridge 2b or not from the result obtained by reading the data disk 31 of the cartridge mounted in the camera, and when it is the cleaning cartridge 2b, the magnetic head is cleaned by performing the winding and rewinding of cleaning tape 1b, and after the finish of the cleaning operation the data disk is set to a state discriminated as being unexposed.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a magnetic head for recording data on a magnetic recording portion on a film, and more particularly to cleaning the magnetic head by using a cleaning cartridge containing a cleaning tape. Regarding the camera to do.

[0002]

2. Description of the Related Art In a camera having a magnetic head of this type, when the film passes over the magnetic head many times to record data in a magnetic recording portion on the film, the film is formed on the surface of the magnetic head as time passes. The magnetic particles and the substance such as the base of the film adhere to the recording characteristics to deteriorate, and accurate magnetic recording cannot be performed. Then, Japanese Patent Laid-Open No. 3-17
As disclosed in Japanese Patent No. 2835, a cartridge containing a cleaning tape dedicated to cleaning a magnetic head is loaded into a camera, and winding / rewinding is performed while the cleaning tape is in contact with the magnetic head. There are cameras that can clean the magnetic head.

[0003]

By the way, in a camera in which a cleaning cartridge is loaded in the camera and the magnetic head can be cleaned in this way, the film cartridge or the cleaning cartridge loaded in the camera is provided with data relating to the film or the cartridge. There is a device in which a displayed data display unit is provided, and the data on the display unit is read by a reading device on the camera side, and a predetermined camera operation is performed according to the reading. In such a camera, when an exposed film cartridge is loaded in the camera, the state of the data display section is changed depending on whether the film is exposed or not so as not to operate the camera. Therefore, when the data display portion of the cleaning cartridge is in a state of being exposed, the camera does not operate when the cartridge is loaded into the camera.

The present invention solves the above-mentioned problems. When a cleaning cartridge is loaded in the camera,
To provide a camera that can automatically wind and rewind the film to clean the magnetic head, and that ensures the cleaning operation even when the cleaning cartridge is reused. With the goal.

[0005]

In order to achieve the above object, the present invention provides a magnetic head for recording magnetic data on a magnetic recording portion on a film pulled out from a film cartridge loaded in a camera body. In a camera for cleaning a magnetic head by winding and rewinding the tape when a cleaning cartridge containing a tape for cleaning the magnetic head is loaded into the camera body, the cleaning cartridge is provided on the film cartridge or the cleaning cartridge. Determination means for determining whether or not the displayed data display section is in a state indicating unexposed, data reading means for reading the data of the data display section, and loading based on the data read by the data reading means Whether the cleaning cartridge is the cleaning cartridge And another to cartridge identification means,
When the cartridge loaded by the cartridge identifying means is identified as a cleaning cartridge, the magnetic head is cleaned by winding and rewinding the tape, and then the data display section is brought to a state in which it is not exposed by the determining means. And a setting means for setting the state to be determined to be present.

[0006]

According to the above construction, the determining means determines whether or not the data display portion provided on the film cartridge or the cleaning cartridge is in the state of not being exposed, and it is determined that it is in the state of being not exposed. Then, the data in the data display section is read by the data reading means,
Based on the data, whether or not the loaded cartridge is a cleaning cartridge is identified by the cartridge identifying means. When the camera is identified as a cleaning cartridge, the camera winds and rewinds the tape to clean the magnetic head.
The setting means sets the data display portion of the cleaning cartridge to a state in which the determination means determines that the data display portion is in the unexposed state. As a result, even when the cleaning cartridge is loaded into the camera again, the camera performs the cleaning operation without any trouble.

[0007]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described below with reference to the drawings. FIG. 1 is a diagram showing a relationship between a film loaded in a camera according to this embodiment and a magnetic head. The photographic film 1a is pulled out from the film cartridge 2a and wound around a winding spool (not shown) provided in the camera. On the film 1a, perforations 4 for film feeding are provided at both ends and an upper portion corresponding to each photographing frame 3, and the perforation 4 is provided by a photo reflector 5 provided on the camera side when the film 1a is fed. By detecting, the feeding amount of the film 1a is detected. Further, a magnetic recording unit 6 is provided below each photographing frame 3, and at the time of photographing, a magnetic head 7 provided on the camera side stores information on each photographing frame 3 in the magnetic recording unit 6. Will be recorded.

FIG. 2 shows a cleaning cartridge mounted on a camera for cleaning the magnetic head. A cleaning tape 1b is built in the cleaning cartridge 2b, and a cleaning unit 8 for cleaning the magnetic head 6 is provided at a position where the cleaning tape 2b contacts the magnetic head 6 when the cleaning cartridge 2b is loaded in the camera.
Is provided. In addition, a perforation 4 for film feeding is provided above the cleaning tape 1b at the same intervals as the photographic film 1a.

FIG. 3 shows a block configuration of a control circuit of this camera. The CPU 10 that controls the entire camera includes an AF circuit that measures the distance to the subject, an AE circuit 11 that measures the subject brightness, a shutter 12 that controls the exposure, a head drive circuit 13 that drives the magnetic head 7, and a film winding. The motor drive circuit 14 that drives the rewinding motor 25, the perforation detection circuit 15, the film cartridge 2a or the cleaning cartridge 2 described later.
Data disc reading circuit 16 for reading the data of the data disc provided in b, motor rotation speed detection circuit 1
7, a main switch 18, a back cover switch 19, and a release switch 20 are connected.

The perforation detection circuit 15 detects the perforation 4 provided on the photographic film 1a or the cleaning tape 1b with the photo reflector 5 to detect the feed amount of the film 1a or the tape 1b. The circuit 16 for reading the data disk is
The photo reflector 21 provided on the camera body reads the bar code of the data disk provided integrally with the spool shaft on the axial end surface of the film cartridge 2a or the cleaning cartridge 2b. The motor rotation speed detection circuit 17 detects the rotation speed of the motor with a photo interrupter 22 described later.

FIG. 4 is a block diagram of a fork drive unit provided in the camera. The fork 23 is the cartridge 2
When a and 2b are loaded in the camera, they are engaged with the engaging portions (32a in FIG. 6) provided on the spools (32 in FIG. 6) of the cartridges 2a and 2b, and the film is rotated as the fork 23 rotates. The tape 1a or the tape 1b is wound and rewound. A driver gear 24 is fixedly fitted to the fork 23, and the torque from the motor 25 is applied to the driver gear 24 by the gears 26a, 26.
and the fork 2 by being transmitted via b and 26c.
3 is designed to rotate.

The motor 25 is provided with a slit disk 27 which rotates in synchronization with the motor 25, and the photo interrupter 22 detects the number of rotations of the slit disk 27.
Six pulses are output for one rotation. The reduction ratio of the motor 25 and the fork 23 is 100 in this embodiment, and therefore, 600 pulses are output when the fork 23 makes one rotation.

FIG. 5 is a partially transparent perspective view of a film cartridge or a cleaning cartridge, and FIG. 6 is a sectional view taken along the line AA 'of this cartridge. Cartridge 2a,
2b is a case 3 for accommodating the film 1a or the tape 1b
0, a data disk (data display section) 31 located on the head of the case 30 and having a barcode for storing data of the film 1a or the tape 1b, and a fork 23 provided on the camera side. And a spool 32 having an engaging portion 32a that engages. Data disk 3
1 is formed integrally with the spool 32, and is linked with the fork 23 so as to rotate counterclockwise together with the spool 32 during film feeding (winding).

Two openings 30 are formed on the bottom surface of the case 30.
a and 30b are provided, and a black light shielding plate 33 is formed above the a and 30b, and the case 30 is provided through the openings 30a and 30b.
It prevents the film 1a or the tape 1b from being exposed to the light entering the inside. Bottom of case 30 and light shield 33
In the space between them, there is a substantially fan-shaped white display plate 34 having a predetermined width.
Is provided. This display plate 34 rotates in conjunction with the fork 23, and depending on its stop position, the openings 30a, 3a.
From 0b, either the black of the light shielding plate 33 or the white of the display plate 34 faces. The openings 30a and 30b are provided to indicate that the film has been exposed and has not been exposed. If the film has been exposed, the opening 30a will be displayed as "white" and the film will be unexposed. If so, the opening 30b is displayed on the display plate 34 so that "white" is displayed.
Is set.

FIGS. 7A and 7B are plan views of the data disk showing the correspondence with the position of the photo reflector 21 when the film cartridge or the cleaning cartridge is loaded in the camera, and FIGS. 8A and 8B are the same. 9A and 9B are perspective views of the cartridge, and FIGS. 9A and 9B are bottom views of the cartridge. In each drawing, (a) shows the case where the film contained in the cartridge has not been exposed or is a cleaning film, and (b) shows the case where the film has been exposed. As shown in FIG. 7, the data disk 31 includes a white zone (center angle is 56 °) 31a,
It is composed of a black zone (center angle is 120 °) 31b and a data zone (center angle is 184 °) 31c.
In the data zone 31c, there are 7 bars (black) and 7 spaces (white) for film-related data (film sensitivity, number of films, whether cleaning cartridge or not, etc.).
It is displayed as a barcode consisting of and. The wide width of the center angle of each bar and space is 20 ° and the narrow width is 8
In the data zone 31c, three wide widths and four narrow widths are included in both the bar and the space.

A photo-reflector (photoelectric sensor) 21 for reading the data on the data disk 31 is provided on the camera side. This photo-reflector 21 is shown in FIG.
3 from the edge A of the black zone 31b as shown in
When it is located on the right side of 0 °, “white” is output to the CPU 10, and as shown in FIG. 7B, when it is located on the left side of 60 ° from the edge A of the black zone 31b, C is displayed.
“Black” is output to PU10.

As shown in FIG. 9, the cartridges 2a, 2
"Exposed" near the opening 30a on the bottom surface of b,
"Unexposed" is displayed near the opening 30b. When the data disk 31 is in the state as shown in FIG. 7A, the display plate 34 is positioned above the opening 30b provided on the bottom surfaces of the cartridges 2a and 2b as shown in FIG. 8A. To do. Therefore, as shown in FIG. 9A, "black" of the light shielding plate 33 faces from the opening 30a, and "white" of the display plate 34 faces from the opening 30b. , "Unexposed" from the bottom of the cartridge 2a, 2b
You can confirm that it is.

On the other hand, when the data disk 31 is in the state as shown in FIG. 7B, the display plate 34 is shown in FIG. 8B.
As shown in, it is located above the opening 30a. Therefore, as shown in FIG. 9B, "white" of the display plate 34 faces from the opening 30a, and "black" of the light shielding plate 33 faces from the opening 30b. It can be confirmed from the bottom surfaces of the cartridges 2a and 2b that "exposed" has been completed.

FIG. 10 is a flow chart showing the operation from the time when a film cartridge or a cleaning cartridge (collectively referred to as a cartridge) is loaded into the camera to photographing and rewinding. First, it is determined whether or not the back cover of the camera is closed (# 1), and when it is closed, the data disk 31 of the cartridges 2a and 2b loaded in the camera is determined from the output result of the photo reflector 21.
It is determined whether or not the data indicates that the exposure has been completed (# 2).

If the film 1a is unexposed or the cleaning tape 1b, the data disk 31 is in the state shown in FIG. 7A and the output of the photo reflector 21 is "white".
Becomes If the film 1a has been exposed, the data disk 31 is in the state shown in FIG. 7B, and the output of the photo reflector 21 is "black". In # 2,
If the data on the data disc 31 indicates that the data has been exposed,
When the processing is terminated without any operation and the film is not exposed, the film 1a or the tape 1b is fed (#
3), the read routine of the data disk 31 is processed (# 4), and the process proceeds to # 5. When the data of the cleaning cartridge 2b is exposed in # 2, the camera stops operating. Therefore, the data of the cartridge 2b must be unexposed.

At # 5, it is determined from the result of reading the data disk 31 whether or not the cartridge loaded in the camera is the cleaning cartridge 2b. If it is not the cleaning cartridge 2b, since it is the film cartridge 2a, the perforation 4 is detected to position the first frame (# 6), and waits for the release switch 20 to be turned on (# 7). When the release switch 20 is turned on, the subject brightness and the subject distance are measured (# 8), and a predetermined exposure operation is performed (# 9).

Then, it is judged whether or not it is the final frame (#
10) If it is not the final frame, winding of the film 1a is started (# 11), and data is recorded in the magnetic recording unit 6 (#
12) When the winding of one frame is completed, the film 1a
Is stopped (# 13), the process returns to # 7, and the next photographing is ready. In # 10, when the final frame is reached, the film 1a is rewound (# 14), and when rewinding is completed, an "exposed setting routine" described later is executed (# 15), and the operation is ended.

At # 5, if the cartridge loaded in the camera is the cleaning cartridge 2b, the winding of the cleaning tape 1b is started (# 16), and after waiting for the final frame, the final frame is reached (# Y at 17
ES), the tape 1b is rewound this time (# 18), and when the rewinding is completed, an "unexposed setting routine" described later is performed (# 19), and the operation is ended.

FIG. 11 is a flowchart showing a data disk reading routine. First, the white zone 31a is determined (# 21 to # 24). Wait for the data on the data disk 31 to turn white (YE in # 21
S), the value of the counter T that counts the pulse output from the motor rotation speed detection circuit 17 is reset and counting is started (# 22). Next, after waiting for the data on the data disk 31 to become black (YES in # 23), the counter T
It is checked whether the value of is 63 or more (# 24). If it is not 63 or more, the process returns to # 21 and the above process is repeated.

By the above processing, the white zone 31a
The reason why the determination can be made will be described below. The central angle of the white zone 31a is 56 °, space (that is, white)
Has a wide width of 20 °, so if the average of both is used as the threshold, (56 ° + 20 °) / 2 = 38 °
Becomes Since the reduction ratio between the motor 25 and the fork 23 is 100, 600 pulses are output when the data disk 31 makes one rotation. Therefore, when the data disk 31 rotates 38 °, the motor rotation speed detection circuit 17 outputs 600 × 38.
/ 360 = 63 pulses are output. Therefore, in # 24, if the value of the counter T is not 63 or more, it means that the read white data is not the white data of the white zone 31a because the data disk 31 is not rotated by 38 ° or more.

If the value of the counter T is 63 or more in # 24, it means that there is the white zone 31a. Then, it is checked whether or not the data on the data disk 31 is white (# 25), and black is determined. Wait for passage of zone 31b. After passing through the black zone 31b, the space width and the bar width are measured (# 26 to # 33).

In this process, first, in order to measure the nth space width, 1 is set to the variable n (# 2
6) The value of the counter T is reset to start counting (# 27), and it is checked whether the data on the data disk 31 has become black (# 28). When the data turns black, w that indicates the count amount corresponding to the angle of the nth space
The value of the counter T is stored in (n) (# 29). Next, in order to measure the bar width, the value of the counter T is reset and counting is started (# 30), and the data disk 3
It is checked whether the data of 1 is white (# 31), and when the data is white, the value of the counter T is stored in b (n) indicating the count amount corresponding to the angle of the n-th bar (#). Three
2). Next, 1 is added to the variable n (# 33), and it is checked whether or not the variable n has become 8 (# 34). Until the variable n becomes 8, that is, reading of all data in the data zone 31c is completed. Until it is done, the process returns to # 27 and the above process is repeated.

By the above processing, the count amounts w (n) and b corresponding to the seven space widths and bar widths, respectively.
(N) is obtained. After that, the count amount w (n) and b
From (n), it is determined whether the space and bar are wide or narrow (# 35 to # 43).

First, in order to discriminate wide and narrow spaces, 1 is set to the variable n (# 35), and the counter amount w
It is checked whether (n) is larger than 23 (# 36). In the present embodiment, the wide width is 20 ° and the narrow width is 8 °. Therefore, if the average of the two is set as the threshold for discriminating between wide and narrow, (20 ° + 8 °) / 2 = 14.
When the data disk 31 rotates by 14 °, the motor rotation speed detection circuit 17 outputs 23 pulses. #
In 36, if the counter amount w (n) is larger than 23, the n-th space width is determined to be wide, “1” is stored in the space identifier W (n) (# 37), and the counter amount w ( If n) is not larger than 23, it is determined to be narrow and "0" is stored in the space identifier W (n) (# 3
8), proceed to # 39 and thereafter.

In # 39 to # 41, it is determined whether the bar is wide or narrow. First, the counter amount b (n) is 2
If b (n) is larger than 23, it is determined that the n-th bar width is wide and the bar identifier B is larger than 3.
"1" is stored in (n) (# 40), and if it is not larger than 23, it is determined to be narrow and "0" is stored in the bar identifier B (n) (# 41). Then, 1 is added to the variable n (# 42), and it is checked whether the variable n has become 8 (#
43), the process returns to # 36 and repeats the above processing until the variable n becomes 8. By the above process, the space identifier W
“0” or “1” is stored in each of (n) and the bar identifier B (n). When the variable n becomes 8 in # 43,
These space identifier W (n) and bar identifier B (n)
Then, the data displayed in the data zone 31c is determined (# 44), and the operation is completed. The data can include film sensitivity, the number of films, and information on whether or not the cartridge is a cleaning cartridge. Also, for example, unused film sensitivity can be promised as a cleaning cartridge.

FIG. 12 is a flow chart showing the exposure setting routine. This routine is for setting the data disk 31 to the state shown in FIG. First, the white zone 31a is determined (#
51- # 54). This determination process is performed by # 21 to # 2 in FIG.
Since it is the same as the processing of 4, the description is omitted. When the determination in # 54 is YES, the value of the counter T is reset and counting is started (# 55), and the process waits until the value of the counter T reaches 100 (# 56). The reason is that the data disk 31 is rotated by 60 ° from the edge A of the black zone 31b as shown in FIG. 7B, and the number of pulses at that time is 600 × 60/360 = This is because it becomes 100 pulses. When the value of the counter T reaches 100, the motor 25 is stopped (# 57). As a result, as shown in FIG. 7B, the data disk 31 is stopped at the position rotated 60 ° counterclockwise after the edge A of the black zone 31b is detected by the photo reflector 21. become.

FIG. 13 is a flowchart showing an unexposed setting routine. This routine is for making the data display of the cleaning cartridge 2b unexposed. First, the white zone 31a is determined (# 6
1 to # 64). This determination process is performed by # 21 to # 24 in FIG.
Since the processing is the same as that of step 1, the description will be omitted. # 64 judgment is Y
When it becomes ES, the value of the counter T is reset and counting is started (# 65), and it waits until the value of the counter T reaches 550 (# 66). The reason is that the data disk 31 is rotated by 330 ° from the edge A of the black zone 31b as shown in FIG. 7A, and the number of pulses at that time is 600 × 330/360 = This is because it becomes 550 pulses. When the value of the counter T reaches 550, the motor 25 is stopped (# 67). As a result, as shown in FIG. 7A, the data disk 31 is stopped at the position rotated 330 ° counterclockwise after the edge A of the black zone 31b is detected by the photo reflector 21. become.

When the film 1a stored in the film cartridge 2a loaded in the camera is used up by the above processing, the data disc 31 is judged to be exposed after the rewinding of the film 1a. When the cleaning cartridge 2b is loaded, the data disk 31 is set in a state where it is determined that the data disk 31 is unexposed after the rewinding of the tape 1b. As a result, even if the cleaning cartridge 2b has been used once, when the cleaning cartridge 2b is loaded again in the camera, the tape 1b is automatically wound up and rewound, and the magnetic head 7 is cleaned.

[0034]

As described above, according to the present invention, when the film cartridge or the cleaning cartridge for cleaning the magnetic head is loaded in the camera, the data display portions provided in these cartridges are in the state of not exposing. Whether it is present or not is determined, and when it is a cleaning cartridge, the cleaning head can be automatically wound up and rewound to clean the magnetic head. After the cleaning operation, the data display section is set to show the unexposed state, so even if a used cleaning cartridge is loaded into the camera again, the cleaning tape will automatically wind up without any problems. -The magnetic head can be cleaned by rewinding.

[Brief description of drawings]

FIG. 1 is a diagram showing a relationship between a film loaded in a camera and a magnetic head according to an embodiment of the present invention.

FIG. 2 is a configuration diagram of a cleaning cartridge that is mounted on the camera according to the present embodiment to clean the magnetic head.

FIG. 3 is a block configuration diagram of a control circuit of the camera.

FIG. 4 is a configuration diagram of a fork drive unit of the camera.

FIG. 5 is a partially transparent perspective view of a film cartridge or a cleaning cartridge.

FIG. 6 is a sectional view taken along line AA ′ of the cartridge.

FIG. 7 is a plan view of the data disk showing the correspondence with the photo reflector position when the cartridge is loaded in the camera, and FIG. 7A is a plan view showing the case where the film contained in the cartridge is an unexposed film or a cleaning cartridge.
(B) shows the case of being exposed.

8A and 8B are perspective views showing the same cartridge. FIG. 8A shows a case where a film contained in the cartridge is an unexposed or cleaning cartridge, and FIG. 8B shows a case where the film has been exposed.

9A and 9B are bottom views of the cartridge, in which FIG. 9A shows a case where the film contained in the cartridge is an unexposed or cleaning cartridge, and FIG. 9B shows a case where the film is exposed.

FIG. 10 is a flowchart showing an operation from loading a cartridge to photographing and rewinding in the present camera.

FIG. 11 is a flowchart showing a data disc reading routine in the present camera.

FIG. 12 is a flowchart showing an exposed setting routine in this camera.

FIG. 13 is a flowchart showing an unexposed setting routine in this camera.

[Explanation of symbols]

 1a film 1b cleaning tape 2a film cartridge 2b cleaning cartridge 7 magnetic head 10 CPU 14 film winding / rewinding motor drive circuit 16 data disk reading circuit 17 motor rotation speed detection circuit 21 photoreflector 22 photointerrupter 31 data disk

Claims (1)

[Claims] 1. A cleaning cartridge having a magnetic head for recording magnetic data on a magnetic recording portion on a film pulled out from a film cartridge loaded in a camera body, and a tape for cleaning the magnetic head. In a camera that winds and rewinds the tape to clean the magnetic head when the is loaded in the camera body, whether the data display section provided in the film cartridge or the cleaning cartridge is in a state of not exposing Determination means for determining whether or not, data reading means for reading data of the data display section, and whether or not the loaded cartridge is the cleaning cartridge based on the data read by the data reading means Cartridge identifying means, and the cartridge When the cartridge loaded by the identifying means is identified as a cleaning cartridge, the magnetic head is cleaned by winding and rewinding the tape, and then the data display section is in a state of not being exposed by the determining means. A camera provided with a setting means for setting a state to be judged.