JPH04123054A - Magnetic signal reading and writing device - Google Patents

Abstract

PURPOSE:To prevent the deviation of a track from occurring by constituting a device so that a magnetic head moves by following the fluctuation of a film in a width direction. CONSTITUTION:A supporting member 12 is rotatably supported by a pin 24, and an extension coil spring 16 presses the member 12 so that a guide surface 20A may always abut on the edge of the film 14 in an axial direction. Therefore, it is rocked by following the fluctuation of the film 14 in the width direction. Thus, the magnetic head 10 fixed on the member 12 and the track 15 provided on the film 14 are always kept in the same positional relation, and the deviation of the track is prevented from occurring.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to a magnetic signal reading/writing device that is used in a film transport device and reads or writes magnetic signals recorded on tracks provided on the film. .

[Prior art]

We propose a film that has a track with a magnetic recording surface on the film used in cameras, and can record film information such as the type of film, order information such as the number of developed sheets, and user information such as the customer's ID on this track. has been done.

In order to accurately read or write the magnetic signals stored in these tracks, it is necessary to cause the contact position between the track and the magnetic head to shift (hereinafter referred to as "track deviation") due to vibrations in the width direction of the film (hereinafter referred to as "meandering"). ).

For this reason, in order to prevent the film from meandering, conventional magnetic signal reading/writing devices are equipped with transport guides so that the widthwise edges of the film come into contact with both sides of the transport path where the film is transported, or By pressing the film against a transport guide provided on one side of the widthwise end of the film, track deviation due to meandering of the film is forcibly prevented.

However, such a device that forcibly prevents the film C from meandering and prevents track misalignment has the disadvantage that the widthwise end of the film is strongly pressed against the guide, causing damage to the film.

[Problem to be solved by the invention]

In consideration of the above facts, the present invention aims to provide a G magnetic signal reading/writing device that does not damage the film and does not cause track deviation.

[Means to solve the problem]

A magnetic signal reading/writing device according to the present invention includes a magnetic head that reads or writes at least one of magnetic signals recorded on a track provided on a film parallel to the longitudinal direction of the film; a supporting member that is attached and abuts against the widthwise end of the film and swings in synchronization with the widthwise swinging of the film; and a supporting member that contacts the widthwise end of the film so as to follow the widthwise swinging of the film. The present invention is characterized in that it includes an urging means that brings the magnetic head into contact with the magnetic head, and a suppressing means that is disposed facing the magnetic head and presses the magnetic head against the track.

[Effect]

In the magnetic signal reading/writing device having the above configuration, when the film shakes in the width direction of the film, the swingable support member to which the magnetic head is attached is always brought into contact with the edge of the film in the width direction by the biasing means. , so it oscillates to follow the sway of the film in the width direction. Therefore, the magnetic head fixed to the support member and the tracks provided on the film can always maintain the same positional relationship, so that no track deviation occurs.

〔Example〕

FIG. 1 shows a partial schematic diagram of a film conveying device to which a magnetic signal reading/writing device according to the present invention is applied.

The film 14 with magnetic signals stored on the track 15 is
It is pinched and conveyed by rollers 2 driven by a motor 1.

The magnetic head 10 is pressed against a roller 18 (see FIG. 2), comes into contact with a track 15 arranged parallel to the longitudinal direction of the film 14, and records and records each frame stored on this track 15. The record on the leading edge of the film 14 is read. The output from the magnetic head 10 is demodulated into a digital signal by a demodulator 3 and stored in a buffer memory 4.

On the other hand, from the keyboard 13, necessary information for each frame and information to be input at the front and rear ends of the film 14 are sent to the buffer memory 4 via the controller 7, and are superimposed on the read information.

Next, the frame detection unit 9 detects the writing position on the film 14, the information in the buffer memory 4 is converted by the modulator 5 into the recording format on the film 14, and the information is written by the magnetic head 6.

It should be noted that writing on the track 15 may be the same track 15 as used during photographing, or may be written on a different track 15.

Next, when a magnetic signal is written on the track 15 of the film 14, the film 14 is conveyed by the rollers 2.

Here, a first embodiment of the magnetic signal reading/writing device according to the present invention will be described with reference to a case where the magnetic head 10 reads magnetic signals.

As shown in FIG. 2, the magnetic signal reading/writing device includes a support member 12 to which a magnetic head 10 for reading magnetic signals is fixed, and a support member 12 attached to the film 14 so as to follow the swinging of the film 14 in the width direction. tension coil spring 16
and a roller 18 that presses the magnetic head 10 and the track 15 surface of the film 14.

The support member 12 includes a guide portion 20 that contacts the widthwise end of the film, and a portion 22 to which the magnetic head 10, which is formed to protrude horizontally from the guide portion 20 to the upper surface of the film 14, is attached.
It is made up of.

The upper end portion of the guide portion 20 is pivotally supported by a pin 24 so as to be swingable. A guide surface 2O is provided on the right side of the lower end of the guide part 20.
A is formed and is in contact with one side of the widthwise end of the film 14. On the other hand, the other end of the tension coil spring 16 is fixed to the upper surface of the mounting portion 22, and the other end of the tension coil spring 16 is fixed within the conveying path, and the support member 12
The guide surface 2OA is urged rightward in the drawing (in the direction of arrow A), and the guide surface 2OA and the widthwise end of the film 14 are always kept in contact with each other.

Three magnetic heads 10 are mounted on the lower surface of the mounting section 22 so as to correspond to the three tracks 15 provided parallel to the longitudinal direction of the film 14. Below these three magnetic heads 10 (two rollers 18 are arranged facing each other), the magnetic heads 10 and the tracks 15 of the film 14 are
It's pressed against the part.

Next, the operation of the first embodiment of the present invention constructed as described above will be explained.

As shown in FIG. 2, the support member 12 is pivotably supported by a bin 24, and the guide surface 2OA is always aligned with the film 1.
A tension coil spring 16 urges the support member 12 to the right in the drawing so that it comes into contact with the widthwise end of the support member 4 .

Therefore, if the film 14 swings in the left width direction (the direction opposite to the direction of arrow A), the width direction end of the film 14 presses the guide surface 2OA, resists the biasing force of the spring 16, and moves the support member 12. Swing to the left (the direction opposite to the direction of the six arrows). Therefore, since the magnetic head 10 similarly swings to the left, no track deviation occurs.

Furthermore, when the film 14 swings in the right width direction (in the direction of arrow A), the supporting member 12 swings in the right direction (in the six directions of arrows) due to the biasing force of the spring 16. The state of contact with 2OA is maintained. Therefore, the magnetic head 10 similarly swings to the right, and no track deviation occurs.

Next, as shown in FIG. 3 explaining the second embodiment of the present invention, when tracks 15 as magnetic recording surfaces are formed on both sides of the widthwise ends of the film 14, the first embodiment This shows an embodiment in which such reading devices are arranged on both sides of the film 14 in the longitudinal direction.

Also in this second embodiment, since the pair of support members 26A and 26B can swing left and right (in the right direction and the opposite direction of the arrow) following the swing of the film 14 in the width direction,
No track deviation occurs. That is, when the film 14 swings in the left width direction (arrow right direction), the support member 26A swings leftward due to the biasing force of the tension coil spring 16A.

On the other hand, the support member 26B is pushed out by the film 14 against the biasing force of the spring 16B, and swings to the left.

Note that this also applies even if the film 14 swings in the opposite direction.

Next, as shown in FIG. 4, which describes a third embodiment of the present invention, a support member 28 that moves following the swinging of the film 14 in the width direction is housed in a housing 30 so as to be able to move in and out. . A compression coil spring 32 is provided on the bottom surface 30A of the housing 30, and urges the support member 28 to the right in the drawing (in the direction of arrow C).

The support member 28 has a guide surface 28A and a mounting portion 34 for the magnetic helad 10, as in the first embodiment, and a film 140.
It can move in the left and right directions in the drawing (in the direction of the arrow and in the opposite direction) following the sway in the width direction.

Next, the operation of the third embodiment will be explained.

As shown in FIG. 4, if the film 14 swings in the left width direction (arrow direction), the width direction end of the film 14 presses the guide surface 28A, and the compression coil spring 32
The support member 28 is moved to the left (in the direction of the arrow) against the urging force. Therefore, since the magnetic head 10 similarly swings to the left (in the direction of the arrow), no track deviation occurs.

Furthermore, when the film 14 swings in the right width direction (in the opposite direction to the direction indicated by the arrow), the supporting member 28 moves to the right (in the direction opposite to the direction indicated by the arrow) due to the biasing force of the compression coil spring 32. width direction end and guide surface 28
The state of contact with A is maintained. Therefore, since the magnetic head 10 also moves to the right while maintaining its positional relationship with the track 15, no track deviation occurs.

Note that although the device according to the present invention can be used for reading and writing magnetic signals, in order to simplify the explanation, in this embodiment, the case of reading magnetic signals has been described.

Further, although the magnetic head 10 is illustrated as having a plurality of channels, it may be of a single channel.

〔Effect of the invention〕

As explained above, in the magnetic signal read/write device according to the present invention, the magnetic head moves in accordance with the fluctuation of the film in the width direction, so that no track deviation occurs.

Also, since the film transport is not forcibly guided,
Will not damage the film.

[Brief explanation of drawings]

FIG. 1 shows partial factors of a film transport device to which a magnetic signal read/write device according to the present invention is applied, and FIG. 2 shows a film transport state of the magnetic signal read/write device according to the first embodiment of the present invention. 3 is a side view showing the film transport state of a magnetic signal reading/writing device according to a second embodiment of the present invention, and FIG. 4 is a side view showing a magnetic signal reading/writing device according to a third embodiment of the present invention. FIG. 3 is a side view showing the film conveyance state. 6.10... Magnetic head, 12.26.28... Supporting member, 14... Film, 16.32... Spring (biasing means), 18...
...Roller (pressing means).

Claims (1)

[Claims] a magnetic head that at least reads or writes magnetic signals recorded on tracks provided on the film parallel to the longitudinal direction of the film; a supporting member that swings in synchronization with the swinging of the film; a biasing means that brings the supporting member into contact with an end of the film in the width direction so as to follow the swinging of the film in the width direction; 1. A magnetic signal reading/writing device, comprising: pressing means arranged to press a magnetic head against the track.