JPH08122900A - Platen and platen unit in camera using film having magnetic storage capability - Google Patents

Abstract

PURPOSE: To easily and precisely position a magnetic head and remarkably reduce the number of assembling processes. CONSTITUTION: A magnetic head 109 is exposed to a film 103 having a magnetic memory part 103a through a window part 1, and the magnetic head 109 is supported so as to be slid on the magnetic memory part 103a of the film 103. A first standard line 10 for setting the track position H in the film 103 to the magnetic head 109 and a second standard line 11 orthogonal to the first standard line 10 for setting the gap position L of the magnetic head 109 are provided around the window part 1. Guide members 2, 3 arranged in parallel to the traveling direction of the film 103 are protruded, and the first standard line 10 and the second standard line 11 are determined on the basis of the guide members 2, 3.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera equipped with a magnetic head for writing and reading information to and from a magnetic storage section provided on a film.

[0002]

2. Description of the Related Art In recent years, a camera system has been developed in which a film having a magnetic storage unit is used, and camera side information such as photographing conditions can be written into or read from the magnetic storage unit. The camera side information includes shutter speed, aperture value, date, title, etc., but a magnetic head is used to write or read such information. Since certain information can be recorded on a film by a magnetic method as needed, as an example of an effective and effective application of such a system, for example,
It can be applied to multimedia equipment that uses the obtained photographic images, and is expected to be promising in the future.

FIG. 3 shows an example of a schematic structure of such a camera. In the figure, 100 is a camera body and 10 is a camera body.
Reference numeral 1 is a lens barrel, 102 is a film cartridge loaded in the camera body 100, 103 is a film pulled out from the film cartridge 102, and the film 103 is a winding spool 1 via a guide roller 104.
It is rolled up to 05. Also, 106 is the film 103.
And a film guide 106 for guiding the film 103 along a predetermined traveling path.
Is a pressure plate interposed between the pressure plate spring 108 and the magnetic head 109 so as to access the film 103 for writing or reading information.
It is elastically supported by the camera body 100 via.

The magnetic head 109 is mounted, for example, at an appropriate position on a corner of the pressure plate 107 as shown in FIGS.
The magnetic head 109 is arranged at the end of the film 103 so as to correspond to the magnetic storage portion 103a provided along the longitudinal direction, and the magnetic storage portion 10 is provided by the pressure plate 107.
It is adapted to be in sliding contact with 3a. Then, the shooting information can be written or read at a predetermined timing for each shooting frame of the traveling film 103.

When the magnetic head 109 is attached to the pressure plate 107, a window 1 is opened at a predetermined position of the pressure plate 107 as shown in FIG. 4, and the magnetic head 109 is attached to the magnetic film 109 through the window 1. The magnetic head 109 is exposed to the side of the storage unit 103a and brought into sliding contact with the film 103. A pair of guide rods 2 and 3 for traveling and positioning the film are formed on the pressure plate 107 so as to project toward the film 103, as shown in the drawing, for guiding the film 103.

[0006]

By the way, when writing or reading information by the magnetic head 109, it is extremely important to properly slide the magnetic head 109 onto the magnetic storage portion 103a of the film 103. For this reason, rather strict mechanical dimensional accuracy based on the pressure plate 107 is required, and azimuth, track position, gap position, etc. are particularly important items.

According to the conventional positioning method of the magnetic head 109, the guide rods 2 in the width direction of the film 103 are
A straight line 1 passing through the vertices 2a and 3a of 3 (the film 10
The track position H is adjusted with reference to the film edge 3 corresponding to the straight line l). Also, for example, the guide rod 2
The gap position L is set with reference to the center of, and the gap position L is adjusted so as to be orthogonal to the straight line 1 (azimuth adjustment). However, in such position adjustment, since the magnetic head 109 is positioned by performing optical dimensioning with the guide rods 2 and 3 as a reference, a considerable number of man-hours are required for its assembly. I had no choice.

SUMMARY OF THE INVENTION Therefore, an object of the present invention is to easily and accurately position a magnetic head so that the number of assembling steps can be significantly reduced.

[0009]

According to the pressure plate of the present invention, a magnetic head is exposed through a window in a film having a magnetic memory portion, and the magnetic head is slidably contacted with the magnetic memory portion of the film. In particular, a first reference line for setting the track position on the film with respect to the magnetic head around the window portion, and the first reference line. And a second reference line for setting the gap position of the magnetic head.

Further, in the pressure plate of the present invention, a guide member arranged parallel to the traveling direction of the film is provided so as to project, and the first reference line and the second reference line are set with reference to this guide member. It is defined. Alternatively, in the pressure plate of the present invention, a sub-reference line defined so as to correspond to the track position and the gap position or the tolerance to the azimuth is attached to the first reference line and the second reference line, respectively. Is.

Further, the pressure plate unit of the present invention supports the magnetic head by slidingly contacting the film having the magnetic storage portion so as to write or read certain information in the magnetic storage portion. The pressure plate for
It is provided with.

Further, the camera of the present invention is such that information can be written in or read from the magnetic storage section provided on the film, and in particular, it is equipped with the pressure plate unit and pulled out from the film cartridge. The magnetic head is slidably brought into contact with the formed film so that information can be written in or read from the magnetic storage portion of the film by the magnetic head.

[0013]

According to the present invention, a magnetic head is slidably brought into contact with a film having a magnetic storage portion to write or read certain information in the magnetic storage portion. The pressure plate supports the magnetic head and is brought into slidable contact with the magnetic memory portion of the film, but has a first reference line and a second reference line around the window portion, so that the magnetic head is attached. At this time, it is possible to assemble easily and accurately with reference to those reference lines.

The first reference line and the second reference line are defined by guide members arranged in parallel with the running direction of the film, and the track position and the gap position in the film and the magnetic head can be reasonably and accurately aligned. You can Further, by providing a tolerance for the track position, the gap position, etc., and displaying these with a sub-reference line, the convenience of assembling the magnetic head is improved, and the first reference line and the second reference line are effectively backed up. can do.

In a camera provided with such a pressure plate unit, a magnetic head is slidably contacted to a film drawn from a film cartridge via the pressure plate unit. Although information is written in the magnetic storage portion of the film during this sliding contact, proper writing or reading of information can be guaranteed by maintaining the degree of adhesion of the magnetic head to the magnetic storage portion.

[0016]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT A preferred embodiment of the present invention will be described below with reference to FIG.

In the magnetic head 109 of this embodiment, as shown in FIG. 1, the magnetic storage unit 1 is provided along the longitudinal direction at the end of the film 103 at the proper position on the corner of the pressure plate 107.
It is assumed to be arranged so as to correspond to 03a. The arrangement relationship and the basic configuration of the pressure plate 107 are the same as those in the conventional example, and the magnetic head 109 is brought into sliding contact with the magnetic storage portion 103a by the pressure plate 107.

Guide rods 2 and 3 for traveling and positioning the film are formed on the pressure plate 107 so as to project toward the film 103. A straight line 1 passing through the vertices 2a and 3a of the guide rods 2 and 3 and corresponding to the film edge of the film 103
With reference to the first area around the window 1 as shown.
A reference line 10 is defined. The first reference line 10 is parallel to the straight line 1 and matches the prescribed information position line of the film 103.

A second reference line 11 for defining the gap position L of the magnetic head 109 is defined around the window 1 and orthogonal to the first reference line 10. The second reference line 11 sets a defined information position line in the length direction of the film 103. In this case, the gap position L can be set based on the center of the guide rod 2. By making the gap position line, that is, the second reference line 11 orthogonal to the first reference line 10, the magnetic head 1
It can be used for azimuth adjustment to 09.

When the first reference line 10 and the second reference line 11 are provided, they may be formed by coating or adhering with an appropriate marker that is not easily erased, or may be engraved on the pressure plate 107. The first reference line 10 and the second reference line 11
By providing the magnetic head 109, it is possible to easily and accurately assemble the magnetic head 109 on the pressure plate 107 with reference to these reference lines. Therefore, the man-hours can be remarkably reduced.

In this way, the magnetic head 109 is attached to the pressure plate 107.
When attaching the magnetic head 109, the pressure plate 107 itself, that is, by providing the first reference line 10 and the second reference line 11 around the window 1 as a guide for attaching the magnetic head 109, the magnetic head 109 can be easily and accurately attached. Can be installed. Therefore, in the camera (FIG. 3) equipped with such a pressure plate unit, the magnetic head 109 is slidably contacted to the film 103 pulled out from the film cartridge 102 via the pressure plate unit. At the time of this sliding contact, the film 10
When the information is written in the magnetic storage unit 103a of No. 3, since the magnetic head 109 is accurately positioned,
Proper writing or reading of information on the film 103 can be guaranteed.

Here, FIG. 2 shows a modification of the present invention. In this example, the sub reference line 10 'corresponding to the tolerance H1 of the track position H with respect to the first reference line 10 is
A sub-reference line 11 'corresponding to the tolerance L1 with respect to the gap position L with respect to the reference line 11 and a sub-reference line 12 corresponding to the tolerance .theta. With respect to azimuth are additionally formed as shown in the drawing.

In this case, tolerances are set for the track position and the gap position, and these are set to the sub reference line 1.
By displaying 0 ', 11', and 12, the magnetic head assembling work is further facilitated, and the assembling man-hour is remarkably combined with the first reference line 10 and the second reference line 11 provided as described above. Can be reduced.

[0024]

As described above, according to the present invention, the reference line or the sub-reference line for the reference plate is provided in the pressure plate, so that when the magnetic head is attached, the magnetic head is used with the reference line as a reference. Positioning can be performed with high accuracy. As a result of easily and accurately assembling the magnetic head, the number of assembling steps can be significantly reduced, and proper operation of the apparatus can be guaranteed.

[Brief description of drawings]

FIG. 1 is a front view of an embodiment of a pressure plate unit according to the present invention.

FIG. 2 is a front view showing a modified example of the pressure plate unit according to the present invention.

FIG. 3 is a diagram showing a configuration example of a camera capable of writing and reading information to and from a magnetic storage unit of a film.

FIG. 4 is a diagram showing a configuration of a conventional pressure plate unit.

[Explanation of symbols]

 1 window part 2 guide rod 3 guide rod 10 first reference line 11 second reference line 100 camera body 101 lens barrel 102 film cartridge 103 film 104 guide roller 105 winding spool 106 film guide 107 pressure plate 108 pressure plate spring 109 magnetic head

Claims (5)

[Claims] 1. A film having a magnetic storage section,
A pressure plate that exposes a magnetic head through a window portion and supports the magnetic head so as to be in sliding contact with the magnetic memory portion of the film, wherein the magnetic head is provided around the window portion with respect to the magnetic head. A first reference line for setting a track position on the film, and a second reference line for setting a gap position of the magnetic head, the second reference line being orthogonal to the first reference line. Characteristic pressure plate. 2. A guide member, which is arranged parallel to the traveling direction of the film, is provided so as to project, and the first reference line and the second reference line are defined with reference to the guide member. The pressure plate according to claim 1. 3. A sub-reference line defined so as to correspond to a track position, a gap position, or a tolerance with respect to azimuth with respect to the first reference line and the second reference line, respectively. The pressure plate according to claim 1. 4. A magnetic head adapted to write or read certain information to or from a magnetic storage portion by slidingly contacting the film having the magnetic storage portion, and claim 1 for supporting the magnetic head. A pressure plate unit according to claim 1. 5. A camera capable of writing and reading information to and from a magnetic storage section provided on a film, comprising the pressure plate unit according to claim 4, and a film pulled out from a film cartridge. The camera is characterized in that the magnetic head is slidably contacted with the magnetic head so that information can be written in or read from the magnetic storage portion of the film by the magnetic head.