JPH0635059A - Camera - Google Patents

Abstract

PURPOSE:To provide a camera protecting magnetic information recorded and reproduced on a film capable of magnetically recording and reproducing from an external magnetic field. CONSTITUTION:In a camera capable of recording and reproducing the information on a film with a magnetic zone 11 by a magnetic head 25 provided on a main body housing part 1, for, at least, the film with the magnetic zone 11 on a film feeding path, a magnetic shielding member 21 having magnetic shielding properties is provided on the rear cover 5 on the side of the magnetic head 25.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera for protecting magnetic information on a film capable of magnetic recording and reproduction.

[0002]

2. Description of the Related Art Conventionally, as a camera of this type, Japanese Patent Application No.
A camera disclosed in Japanese Patent Application Laid-Open No. -026832 (referred to as Conventional Example 1) or Japanese Patent Application No. 4-032086 (referred to as Conventional Example 2) is known.

In order to reduce the influence of noise from the film feeding motor on the magnetic head contacting the magnetic recording portion of the film, the camera of the prior art 1 has an end portion on the side opposite to the output shaft of the motor. And a shield case is mounted, and an insulating material such as synthetic resin is interposed between the shield case and an end portion of the motor on the side opposite to the output shaft.

The camera according to the conventional example 2 is configured such that 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 board with the head fixing member is provided. .

[0005]

However, the camera of Conventional Example 1 considers only the influence of noise from the motor, and does not consider the magnetic influence from the outside of the camera. Therefore, due to the adverse effect from the external magnetic field, there arises a problem that it becomes difficult to record and reproduce magnetic information with high accuracy in the magnetic recording portion of the film.

Further, the camera of the conventional example 2 is constructed for the purpose of protecting the magnetic head from noise generated from the motor, and like the conventional example 1, no consideration is given to protection of magnetic information. .

The present invention has been made to solve the above problems, and an object thereof is to provide a camera for protecting magnetic information recorded and reproduced on a magnetically recordable / reproducible film from an external magnetic field. is there.

[0008]

In order to achieve such an object, the camera of the present invention is a camera capable of recording / reproducing information to / from a film with a magnetic band by a magnetic head provided in the camera body. In the above, a member having a magnetic shield property is provided on at least the magnetic head side of the film supply path with respect to the film.

[0009]

The magnetic information recorded on the film with a magnetic band is protected by the magnetic shield effect of at least the member having magnetic shield characteristics provided on the magnetic head side with respect to the film.

[0010]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS A camera according to an embodiment of the present invention will be described below with reference to the accompanying drawings. As shown in FIGS. 1 and 4, the camera according to the present embodiment includes a resin housing back cover 5 pivotably supported by a main body housing 1 and a hinge mechanism 3 provided at one end of the main body housing 1. And a camera body having.

A film cartridge 7 is provided in the main body accommodating portion 1.
, A spool chamber 15 in which a spool 13 for winding the film 11 with a magnetic band sent from the film cartridge 7 accommodated in the cartridge chamber 9 is disposed, and the date and weather at the time of photographing, etc. And a magnetic recording means 17 for magnetically recording the information on the film 11 with a magnetic band.

The back cover 5 has a pressure plate 19 for preventing the "flapping" of the film 11 with a magnetic band sent from the film cartridge 7 and a magnetic shield member 21 for protecting the magnetic information of the film 11 with a magnetic band from an external magnetic field. (See Figure 4)
And are provided. In the camera shown in FIG. 4, the pressure plate 19 is omitted in the drawing.

Further, the magnetic recording means 17 has a substantially L-shaped substrate 23 rotatably supported about a support shaft 21 extending along the surface of the film 11 with a magnetic band, and the substrate 23.
A magnetic head 25 attached to one end side (that is, the side on which the spool chamber 15 is arranged) of the magnetic band 25 and a magnetic head 25 arranged at a position facing a magnetic recording section track (not shown) of the magnetic band film 11. The magnetic head 25 is provided so as to face the magnetic head 25 with a pressure bonding pad 27 for pressing the magnetic recording portion track of the film 11 with the magnetic band.

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 always rotatable about the support shaft 21 in the direction of the film 11 with the magnetic band. Further, the substrate 23
An actuator 31 such as a solenoid is attached to the other end of the substrate 23. The actuator 31 controls the rotation amount and the rotation timing of the substrate 23 on one end side.

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 a spindle. It rotates about 21 in the direction away from the film 11 with the magnetic band. On the other hand, the actuator 31
When the tensile force of the spring 29 is applied to the other end side of the substrate 23 by depressurizing, the one end side of the substrate 23 receives the tensile force of the spring 29 and approaches the film 11 with the magnetic band about the spindle. Rotate in the direction.

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 raised substantially vertically along the surface direction of the film 11 with the magnetic band. At the rising portion 23a, the positions of the upper and lower edges of the magnetic strip-attached film 11 delivered from the film cartridge 7 are maintained so that the magnetic recording portion track is always maintained at the position facing the magnetic head 25. Is provided with a pair of position regulating members 33 having an arc-shaped cross section.

Between the position regulating member 33 and the upper and lower edges of the magnetic band-attached film 11, the track width of the magnetic recording portion and the recording frequency used when recording predetermined information on this track are set. Predetermined gaps are configured so that the relationship is maintained in an optimal state.

As shown in FIGS. 2 (a) and 2 (b),
The magnetic head 25 is welded to a substantially central portion of a head support member 35, and the head support member 35 has a circular hole 37 at one end and a U-shaped groove 39 at the other end. . Head support member 3 to which the magnetic head 25 is welded
5 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 side is the film cartridge 7.
After arranging toward the side, the one end side (that is, the side where the circular hole 37 is formed) is brought into contact with the support column 41 projecting from the substrate 23 and the first screw 43 is inserted through the circular hole 37. The coil spring 45 is inserted between the head supporting member 35 on the other end side and the substrate 23, and the other end side is fixed to the substrate 23 by the second screw 47 inserted from the U-shaped groove 39. Screw together.

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 ° with respect to the track scanning direction.

Instead of the second screw 47, a bevel gear 49 with a screw is applied as shown in FIG. 3, and azimuth adjustment is performed via a bevel gear 51 meshed with the bevel gear 49 with a screw. It can also be configured to do so.

In the camera of the present embodiment having such a configuration, the film 11 with the magnetic band in which the reference signal is recorded by the standard writer (not shown) is the photographic frame 53.
For each time (see FIG. 1), the reference signal is reproduced via the magnetic head 25, and information such as the shooting date and weather is recorded on the magnetic recording section track of the film 11 with a magnetic band.
When shooting and recording of information are completed, the film 11 with the magnetic band is sequentially wound up by the spool 13.

In this way, the film position control member 33 regulates the vertical position of the film 11 with a magnetic band, and the pressure pad 27 suppresses the film tilt and adjusts the azimuth, whereby the magnetic property of the film 11 with a magnetic band is controlled. The recording track and the cap of the magnetic head 25 are maintained at 90 °, which enables highly accurate information recording and reproduction. In addition, the information recorded by the camera can be used by other machines,
For example, it is very effective in terms of compatibility when playing back on a lab machine.

Further, the back lid 5 of the camera of this embodiment has a magnetic shield member 2 coated with copper and coated.
1 is provided. Therefore, even if a strong magnetic field exists in the vicinity of the back cover 5, since the magnetic shield member 21 covers the entire surface of the magnetically recorded film 11 having magnetic recording, the information is erased at the time of the information recording and reproducing described above. The harmful effect of rewriting is prevented. 5 to 7 (a)
Shows various types of case backs 5. FIGS. 5 to 6A are types without the pressure plate 19, and FIGS. 6B and 7A are types with the pressure plate 19.

In FIG. 5 (a), the surface of the back cover 5 on the film side is copper-plated. In FIG. 5B, a copper foil seal 55 is attached to the film side surface of the back cover 5. In FIG. 6A, the back lid 5 itself is made of copper.
In FIG. 6B, only the pressure plate 19 is made of copper. In FIG. 7A, the film side surface of the resin pressure plate 19 is plated with copper. In any case, the same operational effects as those of the case back 5 of the above-described embodiment are exhibited.

The structure of the camera of the present invention is not limited to the above-mentioned structure, and for example, as shown in FIG. 7 (b), it can be opened and closed only on the film cartridge chamber 9 side. The present invention is also applicable to a camera provided with the back cover 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).

[0026]

Since the camera of the present invention is provided with a member having a magnetic shield characteristic on at least the magnetic band side of the film with the magnetic band in the film supply path, the magnetic information to be recorded and reproduced is recorded. It is possible to protect from the influence of an external magnetic field.

[Brief description of drawings]

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

2A is an enlarged view of a magnetic head portion of the camera shown in FIG. 1, and FIG. 2B is a top view showing a state in which the magnetic head is welded to a substantially central portion of a head supporting member. .

FIG. 3 is an enlarged view showing a bevel gear with a screw for adjusting azimuth and a bevel gear meshed with the gear.

FIG. 4 is a bottom view schematically showing the entire camera shown in FIG.

FIG. 5A is a perspective view of a back cover having a film-side surface plated with copper, and FIG. 5B is an exploded perspective view of the back cover having a copper foil seal attached to the film-side surface.

FIG. 6A is a perspective view of a back cover made of copper, and FIG.
[Fig. 3] is a perspective view of a back cover in which only the pressure plate is formed of copper.

FIG. 7A is a perspective view of a back cover having a film-side surface of a resin pressure plate plated with copper, and FIG. 7B is a back cover configured to be opened and closed only on the film cartridge chamber side. The bottom view of the camera equipped with.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Main body accommodation part, 5 ... Back cover, 11 ... Film with a magnetic band, 21 ... Magnetic shield member, 25 ... Magnetic head.

Claims (1)

[Claims] 1. A camera in which information can be recorded / reproduced on / from a film with a magnetic band by a magnetic head provided in a camera body, wherein a magnetic field is provided on at least the film on a magnetic head side with respect to the film. A camera comprising a member having a shield characteristic.