JP3344068B2 - Cleaning film cartridge - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a cleaning film cartridge, and more particularly, to a cleaning film cartridge mounted on a camera for cleaning a magnetic head of the camera.

[0002]

2. Description of the Related Art Various cameras capable of magnetic recording have been proposed. However, the magnetic head of such a camera becomes dirty as the number of recordings increases, so that it is necessary to perform cleaning. As a cleaning method, a cleaning film cartridge, which is a cleaning medium, is loaded into the camera instead of the film cartridge, which is a commonly used recording medium, and a cleaning film for cleaning is contacted with the magnetic head instead of the film for photographing. There is a way to send it while letting it go. According to this method, when the camera is provided with a special cleaning mode, the camera executes a cleaning-specific operation different from a normal photographing operation, so that cleaning can be performed quickly.

However, in a camera not provided with a cleaning mode, a cleaning film cartridge is loaded instead of a normal film cartridge.
The following problems arise when attempting to clean the magnetic head by feeding the cleaning film in contact with the magnetic head by a normal photographing operation.

That is, in the case of a camera in which a film cartridge provided with a film information display means for displaying information about a film is loaded, and the information about the displayed film is automatically read, and the photographing conditions are automatically set, the cleaning film cartridge has any type. If the information is not displayed, the camera may not operate because the information cannot be read. If the camera does not operate in this manner, the magnetic head cannot be cleaned, which is a problem. On the other hand, such a problem does not occur in the case of a camera that can execute a shooting operation under predetermined conditions when information cannot be read. However, even in this case, the camera may automatically emit a flash on the assumption that the exposure is insufficient during the shooting operation. When the flash fires like this,
Cameras are problematic because they waste power. Also,
Since the next photographing cannot be performed during the recharging for the reflash, it is necessary to wait during that time, and there is a problem that it takes time for cleaning.

[0005]

Accordingly, a first technical problem to be solved by the present invention is that even if the camera is mounted on a camera which does not have a special operation mode for cleaning,
An object of the present invention is to provide a cleaning film cartridge capable of cleaning a magnetic head of a camera.

A second technical problem is to solve the first technical problem and to reduce the flash of light by cleaning the magnetic head as much as possible.

[0007]

In order to solve the first technical problem, the cleaning film cartridge according to the present invention is configured as follows.

That is, the cleaning film cartridge accommodates a cleaning film for cleaning the magnetic head of the camera in an outer frame so as to be able to be wound up / rewinded, and has dummy information (camera information) corresponding to the film information provided in the photographing film cartridge. Is normal shooting
Dummy information display means for displaying dummy information necessary to operate in the same manner as the operation) .

In the above arrangement, when the cleaning film cartridge is loaded in the camera, the camera reads the dummy information displayed by the dummy information display means. This dummy information provides information necessary for the operation of the camera. Therefore, the camera operates in the same manner as a normal photographing operation, and can feed the cleaning film while making contact with the magnetic head.

Accordingly, the magnetic head of the camera can be cleaned even if the cleaning film cartridge having the above configuration is loaded into a camera that does not have a special operation mode for cleaning.

In order to solve the first technical problem and to solve the second technical problem, the cleaning film cartridge is configured as follows.

That is, the dummy information display means is configured to display the maximum film sensitivity that can be used by the camera.

In the above configuration, since the camera sets the maximum sensitivity as film sensitivity information for determining the exposure condition, the amount of light that should be compensated for insufficiency of exposure during photographing, that is, the amount of flash light, is the most. I need less.

Therefore, with the above configuration, it is possible to solve the first technical problem and to reduce the flash of light by cleaning the magnetic head as much as possible. Therefore, power consumption is reduced and the cleaning time is reduced.

[0015]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS Hereinafter, a cleaning film cartridge according to an embodiment of the present invention will be described in detail with reference to FIGS.

First, a camera using a cleaning film cartridge and a film cartridge loaded in the camera will be described.

This camera is loaded with a film cartridge like a general photographic camera. As shown in FIG. 1, the camera winds up and rewinds a film 4 stored in a film cartridge 1 by a film feeding unit (not shown). An exposure frame 5 is formed between a film winding mechanism (not shown), which is a part of the film feeding unit, and the film cartridge 1, and a photograph is taken by exposing the surface of the film 4 at this position. . The film 4 has a magnetic data recording section 6 below a portion corresponding to the exposure frame 5, and the camera has a magnetic head 9 facing the magnetic data recording section 6 below the film feed path. Each time one frame is shot and the film 4 is wound in the direction of the arrow 100, the magnetic head 9 stores data relating to the photographed image in the running film 4
Is recorded in the magnetic data recording unit 6.

The film cartridge 1 has an information display window 3 on the upper surface of the outer frame 2. In this information display window 3,
A display section (to be described in detail later) of the information display disk stored in the film cartridge 1 is displayed. The camera has an information display window 3 of the loaded film cartridge 1.
A photo-reflector 8 facing the
It is possible to read information on the film sensitivity and the exposed / unexposed state of the film displayed on the information display window 3.

Next, the configuration and operation of the camera will be described with reference to the circuit block diagram of FIG. When the film cartridge 1 is loaded in the camera, the cartridge switch (SCT) 210 detects it. When the release switch (SREL) 220 is turned on, the photographing operation starts. Information on the film sensitivity and the film exposed / unexposed state of the film read by the photo reflector 8 is sent from the information reading unit 230 to the control unit 240. The control unit 240
Film sensitivity data from reading unit 230 and photometry unit 2
The photographing conditions are calculated on the basis of the subject luminance photometric data from 50 and the exposure unit 260 is controlled to expose the film 4. When the brightness is low, the exposure unit 260 emits a flash (not shown) according to the exposure. When the photographing of one frame is completed, the film feeding unit 270 operates according to a signal from the control unit 240, and the film is wound up by one frame. At the same time, based on the data from the control unit 240, the magnetic writing unit 280 writes data related to the photographed image in the magnetic data recording unit 6 of the running film 4.

The operation of the control unit 240 will be described in more detail with reference to the flowchart of FIG. 3 together with FIG. When the film cartridge 1 is loaded into the camera, the control unit 2 receives information from the information reading unit 230.
40 determines whether the film 4 has been exposed or not exposed
(# 1). If the exposure has been completed, a warning is issued (# 2). If not exposed, the control section 240 operates the film feeding section 270 to feed the film 4 and reads the film sensitivity information from the information reading section 230 (# 3). When the film 4 is fed by a predetermined amount, the film feeding section 270 stops (initial load, # 4). Then, the control unit 240 determines the release switch 220 (# 5). When the release switch 220 is on, the photometric unit 250 measures the subject brightness (# 6), and performs an exposure calculation based on the measured brightness data and the film sensitivity data obtained in # 3 (#
7) Exposure (# 8) is performed by operating the exposure unit 260 based on the calculation result. Next, the film is wound up by one frame, and the photographing data is recorded in the magnetic data recording section 6 of the film 4 (# 9). Then, it is determined whether or not the exposure of all the frames of the film 4 has been completed (# 10). If not, the process returns to step # 5. If it is completed, the film feeding unit 27
0 is operated to perform film rewinding (# 11).
Then, the stop position of the information display disk is controlled to display that exposure has been completed on the information display window 3 of the film 4 (# 12).
The stop at the exposed display position is possible by the information reading unit 230 detecting the display of the information display disk, that is, the rotation angle.

Next, the film cartridge 1 used in this camera will be described.

The initial state of the film cartridge 1 is as shown in FIG. 4 (I), and the film 4 (not shown) is completely stored in the outer frame 2. An information display window 3 is provided on the upper surface of the outer frame 2. As shown in FIG.
As shown in (1), there is provided an engaging portion 2a which engages with a spool for film winding and rewinding. The spool is the engaging part 2a
Is rotated, the information display disk rotates and the display appearing on the information display window 3 changes. When the spool is rotated in the winding direction (the direction of arrow 100), the film 4 is pushed out from the slit 2b of the outer frame 2 and comes out.

The information display disk 12 appearing in the information display window 3 of the film cartridge 1 is configured as shown in FIG. That is, the information display disk 12 is a donut-shaped disk provided directly below the upper surface of the outer frame of the film cartridge 1 and has a range of 1
Film speed indicator 18 occupying a range 130 of 80 degrees
An unexposed display section 14 occupying a 90 degree range 110;
And an exposed display section 16 occupying a 90 degree range 120. Known bar codes are recorded on the film sensitivity display section 18 in black and white (shown by oblique lines) and white. The unexposed display portion 14 is entirely white, and the exposed display portion 16 is entirely black. Note that black and white can be the reverse combination.

When the film 4 is not exposed, the unexposed display section 1 is displayed on the information display window 3.
4 is located. On the other hand, when the film 4 has been exposed, the information display disk 12 is rotated by the spool of the camera engaged with the engaging portion 2a so that the exposed display portion 16 is positioned in the information display window 3. . Therefore, when the film cartridge 1 is loaded in the camera, the information display window 3 is displayed on the information display window 3 by the photo reflector 8.
By measuring the reflection of No. 2, it can be determined whether the film 4 is unexposed or exposed.

When the film cartridge 1 is loaded, the camera controls the film 4 by the photo reflector 8.
Is detected, the information display disk 12 is rotated by a predetermined amount in accordance with the feeding of the film 4 through the engaging portion 2a of the film cartridge 1, and the bar code of the film sensitivity display portion 18 is displayed. The image is read from the display window 3 by the photo reflector 8.

The camera using the cleaning film cartridge and the film cartridge used in the camera have been described above. Next, the cleaning film cartridge according to one embodiment of the present invention will be described.

Cleaning film cartridge 20
Has the same appearance as that of the film cartridge 1 shown in FIG. 4, but has an internal structure as shown in FIG. That is, the cleaning film 21 and the rotating member 40 are housed inside the outer frame 30.

The cleaning film 21 is composed of at least a known cleaning medium for cleaning the magnetic head 9 by contact with the film cartridge 1 at least.
Of the film 4 corresponding to the magnetic data recording section 6. If the entire cleaning film 21 is used as a cleaning medium, not only the portion corresponding to the magnetic data recording section 6, the configuration is simple.

The rotating member 40 has a shaft 41 concentric with the outer frame 30.
And an upper disk 46 and a lower disk 44 integrally formed at both ends thereof. The upper disk 46 and the lower disk 44 are concentric with the shaft 41 and approach and face the upper surface 32 and the lower surface 36 of the outer frame 30, respectively. The cleaning film 21 is disposed between the upper disk 46 and the lower disk 44 of the rotating member 40 and has its shaft 4
One end is fixed to 1. A shaft hole 38 is formed in the bottom surface 36 of the outer frame 30, and the shaft end of the shaft 41 of the rotating member 40 is exposed to the outside from the shaft hole 38. An engaging portion 42 that engages with the spool of the camera is formed at the shaft end.

The upper disk 46 of the rotating member 40 has a concave portion 47 whose central upper surface is concentrically recessed with the shaft 41. On the other hand, a cylindrical wall 33 that fits into the concave portion 47 and is opposed to the inner peripheral surface thereof is formed below the upper surface 32 of the outer frame 30. An information display disk 22 configured similarly to the information display disk 12 shown in FIG. 5 is formed on the uppermost surface of the upper disk 46 in a donut shape, and a part thereof is formed on the upper surface 32 of the outer frame 30. Information display window 35
Will be displayed.

As shown in FIGS. 6 to 8, the rotating member 40 and the outer frame 30 are connected by a spring 50. That is, a spring mounting shaft 48 is projected from a predetermined position of the concave portion 47 of the upper disk 46 of the rotating member 40, and one end 50 a of the spring 50 is fixed to a mounting sleeve 52 rotatably engaged with the shaft 48. ing. On the other hand, the cylindrical wall 3 of the outer frame 30
A spring mounting portion 34 is also formed on a part of the inner peripheral surface of 3, and the other end 50 b of the spring 50 is fixed. More specifically, as shown in the cross-sectional view of FIG. 7, in an initial state (unexposed state) before the film cartridge 20 is loaded into the camera, one end 50a of the spring 50 (the rotating member 40 side) is
The spring 50 is attached so as to be located on a line connecting the other end 50b (outer frame side) of the second member and the axis of the rotating member 40.
That is, in the initial state, the spring 50 is in a normal direction to a circle which is a trajectory of one end 50a of the spring 50 when the upper disk 46 rotates. At this time, the spring has a substantially natural length and hardly generates any compressive force or tension. Alternatively, some tension may occur. Spring attachment parts 34, 4
The position 8 is sufficient if an urging force acts in a substantially normal direction with respect to the trajectory circle of one end 50a of the spring in the unexposed display state,
The position is not limited to the position shown in FIG. For example, the spring mounting portions 34 and 48 are at the same angle (for example, 90 degrees) from the position shown in FIG.
(Degree) may be shifted. It is also possible to use a plurality of springs so that substantially the same urging force acts, or to return to an unexposed display by the compression force of the spring.

When the rotary member 40 is rotated by the spool of the camera, the spring mounting shaft 48 for fixing one end 50a of the spring 50 rotates around the axis of the rotary member 40. At this time, the length of the spring changes. In the initial state shown in FIG. 7, the length of the spring 50 is the shortest.
Extend, and tension is generated in the spring 50. The camera can rotate the rotating member 40 against this tension.

Next, the cleaning operation of the cleaning film cartridge 20 having the above configuration will be described.

Cleaning film cartridge 20
Is information (dummy information) similar to the film cartridge 1.
Is displayed, when the cleaning film cartridge 20 is loaded in the camera, the camera can execute a normal photographing operation in the same manner as when the film cartridge 1 is loaded.

That is, in the initial state shown in FIG.
Information display window 3 of cleaning film cartridge 20
Since the unexposed display portion 24 is located at 5, the camera regards the film as an unexposed film and starts a film winding operation.
Since the cleaning film cartridge 20 also has the film sensitivity display section 28, the camera can also read information corresponding to the film sensitivity information and take a picture.

Next, when the release button is pressed, the camera performs a calculation based on the information corresponding to the film sensitivity information and the subject brightness in the same manner as in a normal photographing operation, and performs exposure. At this time, if the camera is set to the highest film speed that can be supported, the operation of the flash is minimized, and the consumption of power and time is minimized.

Therefore, preferably, the film sensitivity display section 28 of the information display disk 22 of the cleaning film cartridge 20 displays the highest film sensitivity that the camera can handle.

After photographing, the camera is moved to the cleaning film 2.
When the winding 1 is wound, the magnetic head 4 performing the writing operation comes into contact with the portion of the cleaning film 21 corresponding to the magnetic data recording section 6, that is, the portion made of the cleaning medium, and the magnetic head 4 is cleaned.

When all the frames of the cleaning film 21 are exposed, the cleaning film 21 is rewound. At this time, the cleaning film cartridge 2
By controlling the spool of the camera that engages with the engagement portion 42 of the shaft 41, the cleaning film cartridge 20
The information display disk 22 is rotated, as shown in FIG.
The exposed display section 26 is controlled to stop in the information display window 35, and the stopped state is maintained. At this time, the spring 5
0 is stretched from the initial state of FIG. 7 to generate tension.

When the cleaning film cartridge 20 is removed from the camera, the engagement of the spool of the camera, which has been engaged with the engaging portion 42 of the film cartridge 20, is released, and the force against the tension of the spring 50 is eliminated. . As a result, the spring 50 contracts and the information display disk 22
Is rotated by 90 degrees to the initial state shown in FIG.
Is displayed. As described above, the spring 50 is a return unit for returning to the unexposed display when the cleaning film cartridge 20 is taken out after use.

When the cleaning film cartridge 20 used for cleaning as described above is loaded into the camera again, the camera operates as the cleaning film cartridge 2.
0 is regarded as an unexposed film by the display of the unexposed display section 24, and the photographing operation, that is, the cleaning operation can be executed in the same manner as above.

Therefore, even if the cleaning film cartridge 20 of the above embodiment is loaded into a camera which does not have a special circuit (program) for cleaning the magnetic head 4, the magnetic head of the camera can be cleaned. is there.

Further, the cleaning film cartridge 20 of the above embodiment can be used repeatedly for cleaning the magnetic head 4.

The present invention is not limited to the above embodiment, but can be implemented in various other modes.

[Brief description of the drawings]

FIG. 1 is a perspective view of a main part of a magnetically recordable camera.

FIG. 2 is a circuit block diagram of the camera of FIG.

FIG. 3 is a flowchart of an operation of the camera of FIG. 1;

FIG. 4 is a perspective view of a film cartridge used in the camera of FIG.

FIG. 5 is a plan view of a main part of an information display disk of the film cartridge of FIG.

FIG. 6 is a sectional view of the cleaning film cartridge of the present invention.

FIG. 7 is a sectional view of a main part of the cleaning film cartridge of FIG. 6; This shows the initial state before loading the camera.

FIG. 8 is a sectional view of a principal part similar to FIG. 7; This shows the state immediately before removing the film from the camera.

[Explanation of symbols]

Reference Signs List 20 cleaning film cartridge 21 cleaning film 22 information display disk (dummy information display means) 24 unexposed display section 26 exposed display section 28 film sensitivity display section 30 outer frame 32 upper surface 33 cylindrical wall 34 spring mounting section 35 information display window 36 Bottom surface 38 Shaft hole 40 Rotating member 41 Shaft 42 Engagement part 44 Lower disk 46 Upper disk 47 Depression 48 Spring mounting part 50 Spring (return means) 50a One end 50b Other end 52 Mounting sleeve

──────────────────────────────────────────────────続 き Continuation of front page (72) Inventor Hiroyuki Okada Osaka International Building Minolta Camera Co., Ltd. 2-3-1-13 Azuchicho, Chuo-ku, Osaka-shi, Osaka (56) References JP-A-3-172835 (JP, A) JP-A-7-287292 (JP, A) JP-A-6-317843 (JP, A) JP-A-60-140033 (JP, U) (58) Fields investigated (Int. Cl. ⁷ , DB name) ) G03B 17/56 G03B 17/24 G03C 3/00 520 G03C 3/00 572

Claims (5)

(57) [Claims] 1. A cleaning film in an outer frame (30).
In (21) winding / rewinding possible housed the cleaning film cartridge (20), a dummy information corresponding to the imaging film cartridge (1) film information provided in the camera is in the normal shooting moving
A cleaning film cartridge for cleaning a magnetic head (9) of a camera, comprising a dummy information display means (22) for displaying dummy information necessary to operate in the same manner as the operation . 2. The non-exposed display section (24) displays the dummy information display means (22) so that the cleaning film cartridge (20) is regarded as an unexposed film. Item 7. A cleaning film cartridge according to Item 1. 3. The display device according to claim 1, wherein the dummy information display means (22) displays the exposed display section (2) in response to the rewinding of the film.
The cleaning film cartridge according to claim 2, wherein the display according to (6) is performed. 4. A cleaning film cartridge (2)
4. The cleaning film cartridge according to claim 3, wherein the dummy information display means (22) performs display by an unexposed display section (24) when (0) is taken out of the camera. 5. The cleaning film cartridge according to claim 1, wherein said dummy information display means (22) displays a film sensitivity of the highest sensitivity that the camera can handle.