JPH0628850U - Camera system - Google Patents

Abstract

(57) [Summary] [Object] To provide a camera system capable of protecting magnetic information of a magnetic recording medium provided on a film from external magnetism such as a magnet. In a camera capable of recording and reproducing information on a film 11 having a magnetic recording medium by a magnetic head 25 provided in a camera body, a back cover 5 arranged on the back side of a film supply path. Of the film 1
A magnetic shield member 21 which is a magnetic shield means is provided on the side facing 1 to protect the magnetic recording medium of the film 11 from the external magnetism, while the film cartridge for accommodating the film has a main body of the film cartridge. A magnetic shield means was also provided in the cartridge by forming it from a magnetic shield material.

Description

[Detailed description of the device]

[0001]

[Industrial applications]

 The present invention relates to a camera system, and more particularly, to a camera system that protects magnetic information on a film having a magnetic recording medium.

[0002]

[Prior art]

 In recent years, various films have been proposed in which a magnetic recording medium is provided on a film of a camera, and shooting information and processing information in a laboratory can be recorded on the magnetic recording medium. In the film having the magnetic recording medium, there is a possibility that the magnetic information recorded on the film may be erroneously erased by a strong external magnetic field such as a magnet, and it is necessary to prevent this.

Various cameras for protecting magnetic information of a film having such a magnetic recording medium have been proposed in the past, for example, Japanese Patent Application No. 0-026832 (referred to as Conventional Example 1) and Japanese Patent Application No. 4-. An example of such a camera is described in, for example, 032086 (referred to as Conventional Example 2).

In order to reduce the influence of noise from the film feeding motor on the magnetic head that abuts on the magnetic recording medium of the film, the camera of the conventional example 1 is opposite to the output shaft of the motor. The shield case is mounted from the end on the side, and an insulating member such as synthetic resin is interposed between the shield case and the end on the side opposite to the output shaft of the motor.

Further, in the camera of the above-mentioned conventional example 2, at least the surface of the head fixing member is made of a material having a magnetic shield effect, and a magnetic shield member for sandwiching the flexible printed circuit board with the head fixing member is provided. Has been done.

On the other hand, currently commonly used camera films are so-called roll films that are housed in a patrone made of iron. As such a patrone, a patrone made of plastic has been proposed in addition to the one made of iron described above, and it is cheaper in cost than the patrone made of metal like the patrone described above. ing.

[0007]

[Problems to be solved by the device]

 In the camera of Conventional Example 1 as described above, only the influence of noise from the motor is considered, and the magnetic influence from the outside of the camera is not considered at all. Therefore, there is a problem that it becomes difficult to record and reproduce magnetic information with high accuracy on the magnetic recording medium of the film due to the adverse effect from the external magnetic field, and further, the magnetic information on the film may be damaged. There is.

Further, the camera of the conventional example 2 is configured for the purpose of protecting the magnetic head from noise generated from the motor, and like the conventional example 1, any consideration is given to protection for magnetic information. It has not been.

On the other hand, since the conventional iron patrone is formed of a thin iron plate, it may cause magnetic flux leakage when exposed to the strong magnetic field as described above.

Further, a cartridge using a non-magnetic material such as the plastic is more susceptible to an external magnetic field than an iron Patron.

The present invention has been made in view of the above problems, and an object of the present invention is to provide a camera system capable of protecting a magnetic recording medium such as a film from external magnetism.

[0012]

[Means for Solving the Problems]

 In order to achieve the above object, a camera system according to the present invention is characterized in that in a camera system using a film provided with a magnetic recording medium, magnetic shielding means for magnetically protecting the magnetic recording medium is provided. To do.

[0013]

[Action]

 The magnetic shield means protects the film magnetic recording medium from the magnetic influence of the external magnetic field.

[0014]

【Example】

 Embodiments of the present invention will be described below with reference to the drawings. As shown in FIGS. 1 to 4, the camera of the first embodiment of the present invention is rotatably supported by a main body accommodating portion 1 and a hinge mechanism 3 provided at one end of the main body accommodating portion 1. And a camera back body 5 having a resin back cover 5.

In the main body accommodating portion 1, a cartridge chamber 9 capable of accommodating a film cartridge 7 and a spool for winding a film 11 having a magnetic recording medium, which is sent from the film cartridge 7 accommodated in the cartridge chamber 9, A spool chamber 15 in which 13 is arranged, and a magnetic recording means 17 for magnetically recording information such as date and weather at the time of photographing on a film 11 having a magnetic recording medium are provided.

On the back cover 5, a pressure plate 19 for preventing so-called “flapping” of the film 11 with a magnetic recording medium sent from the film cartridge 7 and magnetic information of the film 11 with a magnetic recording medium are protected from external magnetism. , And a magnetic shield member 21 which is a magnetic shield means. In the camera shown in FIG. 4, the pressure plate 19 is omitted in the drawing.

Further, the magnetic recording means 17 is a substantially L-shaped substrate 23 rotatably supported around a support shaft 20 extending upward along the surface of the film 11 with a magnetic recording medium, and the substrate 23. A magnetic head 25 attached to one end side of the substrate 23 (that is, the side where the spool chamber 15 is arranged) and arranged at a position facing a magnetic recording medium track (not shown) of the film 11 with a magnetic recording medium; The magnetic head 25 is provided so as to face the magnetic head 25 through the film 11 with a magnetic recording medium, and the magnetic head 25 is provided with a pressure bonding pad 27 for pressing a magnetic recording medium track of the film 11 with a magnetic recording medium.

A spring 29 connected to the main body accommodating portion 1 is attached to the other end side of the substrate 23 (that is, the side on which the film cartridge 7 is arranged). The side on which the head 25 is provided) receives a spring action, and is constantly urged to be rotatable about the support shaft 20 in the direction of the film 11 with a magnetic recording medium. An actuator 31, such as a solenoid, is attached to the other end of the board 23. The actuator 31 controls the amount of rotation and the timing of rotation of the board 23 at one end. ing.

Therefore, when the actuator 31 is driven to press the other end of the substrate 23 against the tensile force of the spring 29, one end of the substrate 23 (that is, the side on which the magnetic head 25 is arranged) is It rotates about the support shaft 20 in a direction away from the film 11 with a magnetic recording medium. On the other hand, when the actuator 31 is decompressed and the tensile force of the spring 29 is applied to the other end side of the substrate 23, the one end side of the substrate 23 receives the tensile force of the spring 29 and has a magnetic recording medium centered on the spindle. It rotates in the direction of approaching the film 11.

Further, the film winding side (that is, the side where the spool chamber 15 is arranged) further than the one end side of the substrate 23 is substantially vertical along the surface direction of the film 11 with the magnetic recording medium. The film 11 with the magnetic recording medium is sent from the film cartridge 7 so that the track of the magnetic recording medium is always maintained at the position facing the magnetic head 25 at the rising portion 23a. A pair of position restricting members 33 having an arc-shaped cross section for restricting the positions of the upper and lower edge portions thereof are provided.

Between the position regulating member 33 and the upper and lower edges of the film 11 with a magnetic recording medium, the track width of the magnetic recording medium and the recording frequency used when recording predetermined information on this track are recorded. The predetermined gap is configured so that the relationship of is maintained in an optimum state.

As shown in FIGS. 2A and 2B, the magnetic head 25 is welded to the substantially central portion of the head supporting member 35. A circular hole 37 is formed on the end side and a U-shaped groove 39 is formed on the other end side. When the head support member 35 to which the magnetic head 25 is welded is attached to one end side of the substrate 23 (that is, the side where the spool chamber 15 is arranged), one end side of the head support member 35 is the film winding side and the other end. After arranging the side facing the film cartridge 7 side, one end side (that is, the side where the circular hole 37 is formed) is brought into contact with the upper end surface of the pedestal 41 protruding from the substrate 23 to form the circular hole 37. It was fastened with the first screw 43 through the other end, and the other end side was inserted from the U-shaped groove 39 by inserting the coil spring 45 between the head supporting member 35 and the substrate 23 on the other end side. It is screwed onto the substrate 23 by the second screw 47.

As a result, by rotating the second screw 47, the other end side of the head support member 35 is bent at a predetermined angle with respect to the one end side, and as a result, the inclination of the head gap with respect to the track is adjusted. (Hereinafter, referred to as azimuth adjustment). The inclination of the head gap is preferably 90 degrees with respect to the track scanning direction.

As shown in FIG. 3, instead of the second screw 47, a bevel gear 49 with a screw is applied, and an azimuth adjustment is performed through a bevel gear 51 meshed with the bevel gear with a screw 49. Can also be configured to do.

In the camera of the first embodiment configured as described above, the film 11 with the magnetic recording medium in which the reference signal is recorded by the standard writer (not shown) is provided for each photographing frame 53 (see FIG. 1). At the same time, while the reference signal is reproduced via the magnetic head 25, the information such as the photographing date and the weather is recorded on the magnetic recording medium track of the film 11 with the magnetic recording medium. When shooting and recording of information are completed, the film 11 with the magnetic recording medium is sequentially wound up by the spool 13.

As described above, by controlling the vertical position of the film 11 with the magnetic recording medium by the film position control member 33 and controlling the azimuth of the film by suppressing the tilt of the film with the pressure bonding pad 27, The gap between the magnetic recording medium track of the film 11 and the magnetic head 25 is maintained at 90 degrees, which enables highly accurate information recording and reproduction. It is also very effective in terms of compatibility when the information recorded by the camera is reproduced on another machine, such as a lab machine.

Further, the back cover 5 of the camera of the present embodiment is provided with a magnetic shield member 21 which is a magnetic shield means and which is coated on permalloy plating. Therefore, even if a strong magnetic field such as a magnet exists near the back cover 5, the magnetic shield member 21 covers the entire surface of the film 11 with a magnetic recording medium on which magnetic recording is performed. This prevents the harmful effects of erasing and rewriting information during playback. Various types of case backs 5 are shown in FIGS. 5 to 7A. 5 to 6 (A) are types without the pressure plate 19, and FIGS. 6 (B) and 7 (A) are types with the pressure plate 19.

In FIG. 5A, the film-side surface of the back cover 5 is permalloy plated as a magnetic shield means. In FIG. 5B, a permalloy foil seal 55 as a magnetic shield means is attached to the film side surface of the back cover 5. In FIG. 6 (A), the back cover 5 itself is formed of permalloy which is a magnetic shield means. In FIG. 6B, only the pressure plate 19 is formed of permalloy which is a magnetic shield means. In FIG. 7A, the film side surface of the resin pressure plate 19 is permalloy plated as a magnetic shield means. In any case, the same operation and effect as the case back 5 of the first embodiment described above are obtained.

It should be noted that the camera structure of the present invention is not limited to the above-described structure, and for example, as shown in FIG. 7 (B), a back structure configured so that only the film cartridge chamber 9 side can be opened and closed. It is also applicable to a camera provided with the lid 5 (the configuration of such a camera is the same as the configuration of the above-described embodiment, and therefore, the same reference numerals are given and the description thereof is omitted). Further, the magnetic shield material is not limited to permalloy, and materials having a magnetic blocking effect can be widely used.

FIG. 8 shows a second embodiment of the present invention. In the second embodiment, the magnetic shield means for protecting the magnetic recording medium of the film is provided in the film cartridge which houses the film. In the film cartridge of the second embodiment, a film F1 having a magnetic recording medium is built in a cartridge main body 61 to form a main part.

The cartridge body 61 has a cylindrical portion 62, an upper lid 63 and a lower lid 64 fitted to the upper end portion and the lower end portion of the cylindrical portion 62, and the axial center of the cylindrical portion 62. And a film winding shaft 65 having a slightly smaller diameter and having a cylindrical shape. A film outlet portion 66 projects from the peripheral surface of the cylindrical portion 62 in parallel with the central axis.

The shape of the film cartridge used in the second embodiment is, for example, JIS standard K7519-1982 "135 type film cartridge" or ISO standard 1007 "photography-135-size film and magazine-Specification on ”and the like.

On the other hand, the film F1 incorporated in the cartridge body 61 has a magnetic recording medium 67 on the back side of the surface coated with emulsion (emulsion). The magnetic recording medium 67 is provided, for example, in the form of an elongated strip between the image-taking screen of the film and the perforation 68 in parallel with the running direction of the film.

In the film cartridge having the above-described shape, the cylindrical portion 62 is formed of a material having a high magnetic permeability which is a magnetic shield device. If not only the cylindrical portion 62 but also the upper lid 63, the lower lid 64, and the film winding shaft 65 are made of a material having a high magnetic permeability, the magnetic protection effect is further enhanced.

According to the second embodiment, the magnetic field existing outside is blocked by the film cartridge, and does not magnetically affect the magnetic recording medium of the film inside the cartridge.

According to the second embodiment having such a configuration, at least a part of the film cartridge is made of a material having a high magnetic permeability so as to have a magnetic shield effect, so that it can be protected from external magnetism. It will be possible.

FIG. 9 shows a first modification of the second embodiment. The structure of the film patrone of the first modification is almost the same as that of the above-mentioned second embodiment, except that the material for forming the cylindrical portion 62a of the film patrone is made of a permalloy-based magnetic shield means. The point is that metal is used.

Even if the film cartridge is formed by using the permalloy-based metal as in the first modification, the same operation and effect as those in the second embodiment can be obtained.

FIG. 10 shows a second modification of the second embodiment. The cylindrical portion 62b of the film cartridge of the third embodiment is made of a resin material and its shape is the same as that of the second embodiment. The difference is that a metal foil (iron, permalloy, etc.) 69 having a high magnetic permeability, which is a magnetic shield means, is attached to the inner peripheral surface of the cylindrical portion 62b of the film cartridge constructed as described above.

The second modified example configured as described above also has substantially the same operation and effect as those of the second example. The second embodiment is not limited to the JIS135 type film cartridge, but can be widely applied to other film cartridges and the like.

[0041]

[Effect of device]

 As described above, according to the present invention, it is possible to provide a camera system that protects a film magnetic recording medium from external magnetism.

[Brief description of drawings]

FIG. 1 is an exploded perspective view schematically showing a main configuration of a camera according to a first embodiment of the present invention.

2A is an enlarged front view of the magnetic head of FIG. 2A, and FIG. 2B is a plan view showing a state in which the magnetic head is welded to a substantially central portion of a head support member.

FIG. 3 is an enlarged side view showing a bevel gear with a screw for adjusting azimuth and a bevel gear meshed with the gear according to the first embodiment.

FIG. 4 is a diagram schematically showing the entire camera of the first embodiment.

FIG. 5 is a perspective view of a back cover of the camera of the first embodiment, in which (A) the film side surface is permalloy plated;
(B) An exploded perspective view of a back cover with a permalloy foil seal attached to the film side surface.

6A and 6B are perspective views of a back cover made of permalloy of FIG. 6A and a back cover of which only the pressure plate is made of permalloy in the camera of the first embodiment.

FIG. 7 is a perspective view of a back cover of the camera according to the first embodiment, in which (A) a film side of a resin pressure plate is permalloy-plated, and (B) only the film cartridge chamber side can be opened and closed. FIG. 3 is a diagrammatic view of a camera with a configured back cover.

FIG. 8 is a perspective view of a film cartridge showing a second embodiment of the present invention.

FIG. 9 is a sectional view of a film cartridge according to a first modified example of the second embodiment.

FIG. 10 is a sectional view of a film cartridge according to a second modification of the second embodiment.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Main body accommodation part 5 ... Back cover 11 ... Film which has a magnetic recording medium 21 ... Magnetic shield member 25 ... Magnetic head 61 ... Patrone body 62,62a, 62b ... Cylindrical part 67 ... Magnetic recording medium 69 ... Metal foil F1 ... Film

Claims (3)

[Scope of utility model registration request] 1. A camera system using a film provided with a magnetic recording medium, characterized by comprising magnetic shield means for magnetically protecting the magnetic recording medium. 2. The camera system according to claim 1, wherein the magnetic shield means is provided in the camera body. 3. The camera system according to claim 1, wherein the magnetic shield means is provided in a film cartridge loaded in the camera body.