JP2000180943A - Equipment having magnetic head - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an equipment provided with magnetic head by which the pressing force of a pad with respect to a magnetic head can be reduced when a magnetic recording action or a magnetic reproducing action is not executed. SOLUTION: This equipment is provided with the magnetic head for recording, reproducing or both for recording and reproducing 3 recording or reproducing information with respect to a film 4 on which a magnetic recording action can be executed, the pad 7 pressing the film 4 to the head 3 and a pressing means pressing the pad 7 to the head 3 side. Then, the pressing force of the pad 7 to the film 4 is made different between the traveling of the film in the winding-up direction and that in the rewinding direction.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an apparatus with a magnetic head for performing magnetic recording on a magnetically recordable film.

[0002]

2. Description of the Related Art Conventionally, in Japanese Patent Application Laid-Open No. Hei 3-200131 or Japanese Patent Application Laid-Open No. Hei 8-6143, a head advance / retreat mechanism is provided on a film traveling path to perform magnetic recording on the film. When the magnetic recording is not performed on the film, the head is retracted.

[0003]

However, with the conventional head advancing / retracting mechanism, a stable pressing force against the film cannot be obtained. In some cases, it was not possible to secure sufficient properties.

An object of the present invention is to perform a magnetic recording or reproduction of a pressing force of a pad against a head without setting a complicated retracting mechanism so that a predetermined pressing force is applied, and magnetic recording or reproduction is not performed. In some cases, an object is to provide a device with a magnetic head that can reduce the pressing force.

[0005]

According to a first aspect of the present invention, there is provided a recording magnetic head, a reproducing magnetic head or a recording / reproducing head for recording or reproducing information on a magnetically recordable film. A dual-purpose magnetic head, a pad that presses the film against the magnetic head, and a pressing unit that presses the pad toward the magnetic head, wherein the pressing unit runs in a film winding direction,
The pressing force of the pad against the magnetic head is made different from the running in the film rewinding direction.

According to the above construction, when magnetic recording is performed when the film is wound up, the pad is pressed against the magnetic head with a predetermined force to perform the magnetic recording, and when the film is rewound, the magnetic recording is performed on the film. Since recording is not performed, minimizing the pressing force of the pad against the magnetic head reduces the power consumption of batteries, etc., increases the number of film feeds, and reduces the emulsion surface of the film by pressing the film with the pad. The generation of shavings can be minimized.

[0007] A second aspect of the invention for achieving the above object is as follows.
In the structure, the pressing force of the pad against the magnetic head in the first moving direction in which the magnetic recording or the magnetic reproduction is not performed on the film is the first force, and the second movement in which the magnetic recording or the magnetic reproduction is performed on the film is performed. The pressing force of the pad against the magnetic head in the direction is a second force.

[0008] A third aspect of the present invention for achieving the above object.
Is characterized in that the second force is a stronger force than the first force.

According to the above construction, for example, the first moving direction is the thrust driving and the winding driving of the film, and the second moving direction is the second driving direction.
If the film is moved in the direction of film rewinding, the load on the film during film thrust driving and film winding driving will be minimized, so that film thrust defects will be eliminated and the film winding speed will be increased, so there is a chance to take a photo You lose less.
Also, when a magnetically recorded film is loaded into a camera or a magnetic reader and the magnetic recording is reproduced, the pressure of the pad against the magnetic head by the pad is applied only to either the winding or rewinding. It is possible to reduce the pressure on the pad in the opposite direction, so that the generation of dust such as abrasion of the film and the head and the pad and the shavings of the emulsion surface of the film can be reduced. Not only greatly improves the durability of the device and the reliability of magnetic playback,
Since the film speed in the direction in which the pressing pressure of the pad can be reduced can be increased, the performance can also be improved.

A fourth aspect of the present invention for achieving the above object.
Is characterized in that the pressing means includes an urging means for generating a pressing force against the magnetic head along the direction in which the film moves with respect to the pad.

According to the above construction, when magnetic recording is performed when the film is wound up, the pad is pressed against the magnetic head with a predetermined force to perform the magnetic recording, and when the film is rewound, the magnetic force is applied to the film. Since no recording is performed, the pressing force of the pad against the magnetic head can be minimized by a simple urging means. In addition, during photographing when the film is not running, the flatness of the film is improved by minimizing the pressing force of the pad against the magnetic head.

A fifth aspect of the present invention for achieving the above object.
Is characterized in that the pad is disposed between the aperture and the take-up spool.

According to the above configuration, the pads can be compactly arranged by utilizing the extra space of the strobe condenser provided between the aperture and the take-up spool.

A sixth aspect of the present invention for achieving the above object.
Is characterized in that the pad is disposed between the aperture and the film cartridge.

According to the above configuration, the pads can be compactly arranged by utilizing the extra space of the lens barrel motor disposed between the aperture and the film cartridge. In the seventh and eighth configurations of the invention for achieving the above object, the pad is formed by a roller.

According to the above configuration, since the pad is configured as a roller, the load of rewinding is not more than necessary, so that power consumption can be minimized and rewinding time can be minimized. High performance cameras and peripherals can be made. Also,
The roller configuration having the rotating friction enables the pressing force of the magnetic head to be optimized when the film moves.

[0017]

DESCRIPTION OF THE PREFERRED EMBODIMENTS (First Embodiment) FIG. 1 is a cross-sectional view showing a first embodiment of the present invention, in which 1 is a film cartridge, 2 is a camera cover, Reference numeral 3 denotes a magnetic head for performing magnetic recording or reproduction, and 4 denotes a magnetically recordable film.

Reference numeral 5 denotes a motor for rotating the take-up spool 6 by a speed reduction system (not shown) to wind and rewind the film 4, and 7 denotes a pad for pressing the film 4 against the magnetic head 3. Body 25
And a pin 7b, which is rotatably supported about a rotation shaft 7c fixed to the camera body 25 and is formed integrally with the pin 8 and the pad 7 fixed to the camera body 25.
A torsion spring 9 is hung between them, and is constantly urged to rotate clockwise, and is pressed against the magnetic head 3 by a first force.

The first force is a weak force that is small for magnetic recording or reproduction, but is a force that can sufficiently secure the flatness of the film 4.

The pad 7 has a curved friction surface 7a.
The film 4 is pressed against the magnetic head 3 by the friction surface 7a, so that when the film 4 moves from the left to the right in the winding direction, that is, from the film cartridge 1 to the spool 6, the pad 7 The frictional surface 7a is dragged by the frictional force with the film 4 so that the pad 7 receives a rotational force in the clockwise direction about the rotation axis 7c. Pressing to 3 provides a second force.

The second force slightly affects the flatness of the film 4. The second force is a force capable of reproducing not only the magnetic recording on the film 4 by the magnetic head 3 but also the magnetism recorded on the film 4. It is.

Reference numeral 10 denotes a photographing lens of the camera, 11 denotes a pressure plate on which the magnetic head 3 is mounted, 12 denotes an aperture frame forming a photographing screen frame, and 22 denotes a main condenser for strobe light emission or a battery which is a power supply of the camera. .

In the above arrangement, the photographing of one frame is completed by pressing a release button (not shown). At this time, since the film 4 is in a stopped state as a matter of course, the pad 7 Since the pressing force is the first force, that is, a weak force, the photographing can be performed while the flatness of the film 4 is sufficiently maintained, so that a good photograph without distortion can be taken.

When the photographing is completed, the magnetic information of the frame is recorded, the motor 5 is energized to set the next frame in the aperture frame 12, and the spool 6 is rotated clockwise, that is, in the winding direction. The film 4 is pulled out of the film cartridge 1 and wound on a spool 6;
That is, the film 4 is moved by one frame from left to right.

When the film is moved, the pad 7 generated
The frictional force between the friction surface 7a and the film 4 causes the pad 7
Generates a force to rotate about the axis 7c, and in addition to the torsion spring 9, the pad 7 pushes the film 4 against the magnetic head 3 with a second force, that is, a pressing force necessary for magnetic recording or reproduction. The magnetic recording on the film 4 by the magnetic head 3 is excellent.

The film is a magnetic head 3 shown in FIG.
On the side surface, emulsion such as a photosensitive agent is coated,
Since the surface on the pad 7 side is a film base surface and is not coated with an emulsion or the like, the friction by the friction surface 7a of the pad 7 is stabilized, and no scraping of the emulsion or the like occurs.

Further, even if the pressing force of the pad 7 at this time becomes strong due to the second force and affects the flatness of the film 4, no photographing is performed while the film 4 is being wound up. No.

Further, when the magnetic recording of the photographed screen is completed and the setting of the next frame is completed, the energization of the motor 5 is stopped, and the winding operation of the film 4, that is, the movement of the film 4 from left to right is stopped. Then, the force due to the friction between the film 4 and the friction surface 7a of the pad 7 disappears, and the pad 7
Only the torsion spring 9 presses the film 4 against the magnetic head 3 with the first force, that is, the weak force again, so that the flatness of the film 4 is improved in the next photographing. Can be

When the film 4 is to be rewound toward the film cartridge 1 when the photographing of all the frames has been completed or when the film 4 is manually rewound in the middle.
The film 4 moves from the spool 6 toward the film cartridge 1, that is, from right to left. At this time, the torsion spring 9 is moved between the friction surface 7a of the pad 7 and the film 4 with the movement of the film 4 in the same manner as the winding.
A frictional force is generated by the pressing force of the pad, but the force of rotating the pad 7 in the counterclockwise direction with respect to the rotating shaft 7c.
The direction of the pad 7 is away from the magnetic head 3. Therefore, the force by which the pad 7 presses the film 4 against the magnetic head 3 is only the torsion spring 9, so that the film 4 can be rewound with the first pressing force being a weak pressing force. The rewind speed can be increased with minimum power consumption, and furthermore, generation of dust such as damage to the film 4 due to the pressing force between the pad 7 and the film 4 and shavings of the film emulsion surface with the magnetic head 3 is minimized. It becomes possible to.

That is, the pressing force of the pad 7 against the film 4 can be changed only by changing the moving direction of the film 4 without using a complicated mechanism, so that cost reduction can be greatly expected.

(Second Embodiment) FIGS. 2 and 3 are partial cross-sectional views showing a second embodiment of the present invention, in which the shape of the pad 7 of the first embodiment is changed. is there. Parts other than the pad 7 are the same as those of the first embodiment, and the description thereof is omitted.

A roller pad 13 for pressing the film 4 against the magnetic head 3 is rotatably supported by a shaft 15 caulked by a pad lever 17 and
The roller pad 13 is configured so that rotational friction is generated with respect to the pad lever 17 by a compression spring 16 interposed between the pad lever 17 and the roller pad 13.

A friction ring 1 is provided on the outer periphery of the roller pad 13.
4, the roller pad 13 generates a frictional force to rotate against the rotational friction when the film 4 moves in the left-right direction.

The friction ring 14 has some elasticity, and when the film 4 is pressed against the magnetic head 3,
A magnetic gap portion (not shown), which is a magnetic force generating portion located at the center of the magnetic head 3, is widely pressed to relax the positioning accuracy of the roller pad 13 and to improve the frictional force at the same time. .

The pad lever 17 is rotatably supported on a shaft 19 fixed to the camera body 25, and includes a pin 21 fixed to the camera body 25 and a pin 18 integrally formed with the pad lever 17. The roller pad 13 is always pressed against the magnetic head 3.

In the above-described configuration, as in the first embodiment described above, when taking a picture while the film 4 is not moving or the like, the force by which the roller pad 13 presses the film 4 against the magnetic head 3 is reduced by the torsion spring 20. Only the first
As a force, the flatness of the film 4 is maintained.

Next, as a winding operation of the film 4,
When the film 4 moves from left to right, the torsion spring 2
The frictional force is generated between the film 4 and the friction ring 14 by the pressing force of the roller pad 13 against the film 4 by 0, and the roller pad 13 is rotated clockwise against the friction of the compression spring 16. .

The frictional force due to the clockwise rotation of the roller pad 13 acts on the pad lever 17 as a rotational urging force in the clockwise direction about the shaft 19,
The roller pad 13 exerts not only the torsion spring 20 but also the above-mentioned rotational urging force on the film 4 to press the film 4 against the magnetic head 3 and acts as a second force, and the film 4 is pressed with sufficient force for magnetic recording or reproduction. It can be pressed against the magnetic head 3. Of course, in this case, although the flatness of the film 4 is affected, no problem occurs because no image is taken while the film 4 is moving.

When the winding operation is completed, the film 4
Is stopped, the rotational urging force described above disappears, and the force of the roller pad 13 pressing the film 4 against the magnetic head 3 is only the torsion spring 20, and the flatness of the film 4 is again secured as the first force. This is the same as in the first embodiment.

When photographing of all frames is completed and automatic rewinding or manual rewinding is performed halfway by manual rewinding operation, the film 4 moves from right to left with respect to FIG. Since the roller pad 13 rotates counterclockwise against the friction of the compression spring 16, the rotational urging force of the pad lever 17 acts counterclockwise. Therefore, not only is no urging force for pressing the roller pad 13 toward the magnetic head 3 generated, but also the rotation padding force against the force of the torsion spring 20 is generated.
Since the film 4 is pressed against the magnetic head 3 with a weaker force and acts with the first force, the load of rewinding is not more than necessary, power consumption can be minimized, and rewinding time is also minimized. This makes it possible to manufacture cameras and peripheral devices with extremely high performance.

(Third Embodiment) FIG. 4 shows a third embodiment of the present invention.
FIG. 9 is a cross-sectional view illustrating the embodiment of the present invention, in which the components of the roller pad 13 of the above-described second embodiment are reversed left and right, and the components of the roller pad 13 including the magnetic head 3 are replaced with those of the second embodiment. It is set from the spool chamber side of the embodiment to the cartridge chamber side for storing the film cartridge 1.

With the above configuration, the thrust drive and the winding operation from the film cartridge 1 for the film 4 can be performed smoothly and quickly. That is, film 4
When the movement is from left to right, the roller pad 13 of the film 4 is moved in the same manner as in the rewinding in the second embodiment.
The pressing force against the magnetic head 3 by the torsion spring 2
0 or a force weaker than the torsion spring 20 and the first force allows the thrust drive and the winding operation to be performed smoothly. Can be prevented from being bent.

Also, if the magnetic recording or reproduction of the film 4 is performed when the film 4 is moving from right to left, that is, when the film 4 is rewound, the magnetic recording or reproduction of the film 4 is completely different from the first and second embodiments. The same effect can be achieved because the roller pad 13 can secure the second force applied to the torsion spring 20 by pressing the film 4 against the magnetic head 3.

[0044]

According to the first aspect of the present invention, when magnetic recording is performed when the film is wound, the pad is pressed against the magnetic head with a predetermined force to perform the magnetic recording and when the film is rewound. Does not perform magnetic recording on the film, so minimizing the pressing force of the pad against the magnetic head reduces the power consumption of batteries etc., and increases the number of film feeds or presses the film with the pad And the generation of shavings on the emulsion surface of the film by the magnetic head can be minimized.

According to the second and third aspects of the present invention, the load on the film during the thrust driving and the winding driving of the film is minimized, so that the thrust defect of the film is eliminated and the speed of winding the film is increased. Therefore, the chance of losing a photo opportunity is reduced. Also, when a magnetically recorded film is loaded into a camera or a magnetic reader and the magnetic recording is reproduced, the pressure of the pad against the magnetic head by the pad is applied only to either the winding or rewinding. It is possible to reduce the pressure on the pad in the opposite direction, so that the generation of dust such as abrasion of the film and the head and the pad and the shavings of the emulsion surface of the film can be reduced. In addition to significantly improving the durability of the device and the reliability of magnetic reproduction, the film speed in the direction in which the pressing pressure of the pad can be reduced can be increased, so that the performance can be improved. At the time of photographing when the film is not running, the flatness of the film is improved by minimizing the pressing force of the pad against the magnetic head.

According to the fourth aspect of the invention, when magnetic recording is performed when the film is wound up, the pad is pressed against the magnetic head with a predetermined force to perform the magnetic recording. Since no magnetic recording is performed on the film, the pressing force of the pad against the magnetic head can be minimized by simple urging means. In addition, during photographing when the film is not running, the flatness of the film is improved by minimizing the pressing force of the pad against the magnetic head.

According to the fifth aspect of the present invention, the pads can be compactly arranged by utilizing the extra space of the strobe condenser provided between the aperture and the take-up spool.

According to the sixth aspect of the present invention, the pads can be compactly arranged by utilizing the extra space of the lens barrel motor disposed between the aperture and the film cartridge.

According to the seventh and eighth aspects of the present invention, since the pad is constituted by a roller, the load of rewinding is not more than necessary, power consumption can be minimized, and rewinding time is also minimized. Since it can be minimized, a camera and a peripheral device with very high performance can be manufactured.

[Brief description of the drawings]

FIG. 1 is a cross-sectional view of a camera according to a first embodiment of the present invention.

FIG. 2 is a cross-sectional view showing a part of a camera according to a second embodiment of the present invention.

FIG. 3 is a longitudinal sectional view showing a part of a camera according to a second embodiment of the present invention.

FIG. 4 is a cross-sectional view of a camera according to a third embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Film cartridge 2 ... Camera exterior 3 ... Magnetic head 4 ... Magnetic recordable film 5 ... Motor 6 ... Take-up spool 7 ... Pad 8 ... Pin 9 ... Torsion spring 10 ... Photographing lens 11 ... Film pressure plate 12 ... Aperture frame 13 ... Roller pad 14 ... Friction ring 15 ... Pin 16 ... Compression spring 17 ... Pad lever 18 ... Pin 19 ... Rotating shaft 20 ... Torsion spring 21 ... Pin 22 ... Main condenser 23 ... Film pressure plate 24 ... Motor 25 ... Camera body

Claims (8)

[Claims] Recording information on a magnetically recordable film;
Alternatively, recording for reproduction, a magnetic head for both recording or reproduction, and a pad for pressing the film against the magnetic head, and a pressing means for pressing the pad toward the magnetic head side, the pressing means, An apparatus having a magnetic head, wherein the pressing force of the pad against the magnetic head is made different between traveling in a film winding direction and traveling in a film rewinding direction. 2. A second force for performing magnetic recording or magnetic reproduction on a film is a first force for pressing the pad against the magnetic head in a first movement direction in which magnetic recording or magnetic reproduction is not performed on the film. The device having a magnetic head according to claim 1, wherein a pressing force of the pad against the magnetic head in a moving direction is a second force. 3. The apparatus having a magnetic head according to claim 2, wherein the second force is a force stronger than the first force. 4. The apparatus according to claim 1, wherein the pressing means includes an urging means for generating a component force for pressing the magnetic head against the pad along a moving direction of the film. An apparatus having the magnetic head according to any one of the above. 5. The pad according to claim 1, wherein the pad is disposed between an aperture and a take-up spool.
An apparatus having the magnetic head according to any one of claims 1 to 4. 6. The apparatus having a magnetic head according to claim 1, wherein the pad is disposed between an aperture and a film cartridge. 7. The apparatus having a magnetic head according to claim 1, wherein the pad has a roller configuration. 8. The apparatus having a magnetic head according to claim 1, wherein the pad in the roller configuration has a rotational friction of the roller.