JPH04271338A - Camera using film with magnetic storage part - Google Patents

Abstract

PURPOSE:To orderly wind the leading edge of a film to the film spool of a camera by adding balanced load to the film by 1st and 2nd press-contact means. CONSTITUTION:Frictional force between the 1st press-contact member 3 and the film 2, and between the film 2 and a magnetic head 1 generated in the case that 1st press-contact member 3 presses the film 2 with the pressing force of a compression spring 4 is made nearly equal to the frictional force between the 2nd press-contact member 5 and the film 2, and between the film 2 and the pressure plate 8 generated in the case that the 2nd press-contact member 5 presses the film 2 by the pressing force of a compression spring 6. Namely, the 2nd member 5 is provided at a position which is nearly symmetric to the 1st member 3 with respect to a central line in the width direction of the film 2. In the case of feeding the film 2, the symmetric load is added in the width direction of the film by the 1st and the 2nd members 3 and 5.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a magnetic head that writes or reads information by slidingly contacting a magnetic storage section provided on a film, and a first magnetic head that brings the magnetic storage section of the film into pressure contact with the magnetic head. The present invention relates to an improvement in a camera using a film with a magnetic storage unit and a pressure contact means.

0002

[Prior Art] Conventionally, a camera that uses a film equipped with a magnetic storage section and allows recording of photographing information, date, etc. on the magnetic storage section using a magnetic head, or reading information from the magnetic head, has been patented in the United States. It has been proposed in No. 4860037 and the like.

FIG. 6 is a diagram showing the main structure of this type of camera, and the film 102 is fed through the gap formed between the main body 104 and the pressure plate 105.
The magnetic head 101 fixed to the film 10
Information is written to or read from the second magnetic storage section.

By the way, when driving the magnetic head 101 in this way, the magnetic head 101 and the film 102
In order to make stable contact with the magnetic head 101, a pressure member 103 is provided at a position opposite to the magnetic head 101 with the film 102 in between.
It is pressed to 1.

FIG. 7 is a perspective view of the pressure plate 105, in which the magnetic head 101 is attached to the head insertion hole 105a.

[0006]

However, in the above conventional example, due to the frictional force generated between the magnetic head 101 and the film 102, the film 1
02 is subjected to a non-equilibrium force with respect to the centerline A (see FIG. 7). As a result, when the film 102 is wound onto a film spool (not shown) of the camera, it is not wound in an orderly manner, resulting in what is called a loose winding.

Furthermore, as shown in Japanese Patent Application No. 63-220049, when not in use, the entire film piece including the leading edge of the film is stored in a film cartridge, and the cartridge is stored inside the camera body. In the case where the film 102 is sent out of the film cartridge only after the cartridge is loaded, the back cover is closed, and the driving force is transmitted from the film feeding fork, the leading edge of the film is in contact with the magnetic head 101 and the pressure member 103. As a result, the leading edge of the film is not able to advance straight after passing through these spaces, and is fed bent as it is pulled by the magnetic head 101 and pressure contact member 103, and is fed to the film spool of the camera. Sometimes it doesn't wrap properly.

An object of the present invention is to provide a film with a magnetic storage unit that can apply a balanced load to the film during film feeding and wind the film in an orderly manner around the film spool of a camera. The objective is to provide a camera that can be used.

[0009]

SUMMARY OF THE INVENTION According to the present invention, a second pressing means for pressing the film is provided at substantially symmetrical positions with respect to the width direction of the magnetic head and the film.

0010

[Operation] The second pressure contact means presses the film at a position that is almost symmetrical to the first pressure contact means in the width direction of the film, so that when the film is fed, the film is kept in equilibrium. It becomes subject to heavy loads.

[0011]

DESCRIPTION OF THE PREFERRED EMBODIMENTS FIGS. 1 and 2 show the main structure of a camera according to a first embodiment of the present invention.

In these figures, 1 is a magnetic head, 2 is a magnetic head, and 2 is a magnetic head.
3 is a film having a magnetic storage section; 3 is a first pressing member for pressing the film 2 against the magnetic head 1; 4 is a compression spring between the camera body 7 and the first pressing member 3; The first pressing member 3 presses the film 2,
It will be pressed against the magnetic head 1. 5 is film 2
The second pressure contact member is a pressure contact means, and is provided at a position substantially symmetrical to the first pressure contact member 3 with respect to the center line A in the width direction of the film 2 (see FIG. 2). Reference numeral 6 denotes a compression spring located between the camera body 7 and the second pressing member 5, which causes the second pressing member 5 to press the film 2 against the pressure plate 8 to which the magnetic head 1 is fixed. Become.

In the above configuration, the compression spring 4
The friction force between the first pressure contact member 3 and the film 2 and between the film 2 and the magnetic head 1 that is generated when the first pressure contact member 3 pushes the film 2 due to the biasing force of the compression spring 6
It is configured to be approximately equal to the friction force between the second pressure contact member 5 and the film 2 and between the film 2 and the pressure plate 8, which is generated when the second pressure contact member 5 presses the film 2 due to the biasing force.

As a result, when the film 2 is fed, symmetrical loads are applied to the film by the first pressure contact member 3 and the second pressure contact member 5 in the width direction of the film. -It will be rolled up in an orderly manner.

FIGS. 3 and 4 show the main structure of a second embodiment of the present invention, and the same parts as in the first embodiment are given the same reference numerals.

In these figures, reference numeral 9 denotes a leaf spring, which has a pressing part 9a that presses the film 2 toward the magnetic head 1 and a leaf spring that is symmetrical to the pressing part 9a with respect to the center line A in the width direction of the film 2 (see FIG. 2). A pressing portion 9b is provided at the same position to press the pressure plate 2 with the same force. Reference numeral 10 denotes a camera body, to which a portion 9c of the leaf spring 9 is fixed.

As a result, when the film 2 is fed, symmetrical loads are applied in the film width direction by the pressing portions 9a and 9b of the leaf spring 9, so that the film spool (not shown) of the camera is It will be rolled up in an orderly manner.

FIG. 5 shows the main structure of a third embodiment of the present invention, and the same parts as in the first embodiment are given the same reference numerals.

Reference numeral 11 denotes a camera body, and a protrusion 11a is provided at a corresponding position of the second pressure contact member 5, which plays the role of the second pressure contact member 5 (and compression spring 6) in the first embodiment. It is formed. In other words, the protrusion 11
The gap between a and the pressure plate 8 is narrower than the gap between the other inner rail surface and the pressure plate 8, so that when the film 2 travels, a load is applied due to friction. This allows the first
And the same effects as in the second embodiment can be obtained.

According to each of the above embodiments, the pressing member that presses the film 2 against the magnetic head 1 that reads and writes information in the magnetic storage portion of the film 2 applies the same pressing force to the symmetrical position in the width direction of the film. Since the pressing member is provided, when the film 2 is fed, the film 2 is subjected to a balanced load, so that the film 2 is wound in an orderly manner onto the film spool.

[0021]

[Effects of the Invention] As explained above, according to the present invention,
A second pressure contact means for pressing the film is provided at a position substantially symmetrical with respect to the width direction of the magnetic head and the film, and when the film is fed, the first pressure contact means and the second pressure contact means keep the film in equilibrium. We are trying to add a certain amount of load. This allows the leading edge of the film to be attached to the camera's film spout.
It will wrap around the loop in an orderly manner.

[Brief explanation of the drawing]

FIG. 1 is a longitudinal sectional view showing the configuration of main parts of a camera in a first embodiment of the present invention.

FIG. 2 is a perspective view showing the main part configuration of a camera according to a first embodiment of the present invention.

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

FIG. 4 is a perspective view showing the main part configuration of a camera according to a second embodiment of the present invention.

FIG. 5 is a longitudinal sectional view showing the configuration of main parts of a camera according to a third embodiment of the present invention.

FIG. 6 is a vertical cross-sectional view showing the main configuration of a part of a conventional camera according to the present invention.

FIG. 7 is a perspective view showing the main configuration of a portion of a conventional camera according to the present invention.

[Explanation of sign]

1 Magnetic head 2 Film 3 First pressing member 4 Compression spring 5 Second pressing member 6 Compression spring 7 Camera body 8 Pressure plate 9. Leaf spring 9a, 9b Pressing part 11 Camera body 11a Protrusion

Claims (1)

[Claims] 1. A magnetic head disposed on one side other than the center in the width direction of the film, which writes or reads information in sliding contact with a magnetic storage section provided on the film, and a magnetic head of the film. In a camera using a film with a magnetic storage section, the camera includes a first pressure contact means that presses the storage section and the magnetic head, and a first pressure contact means that presses the film at substantially symmetrical positions with respect to the width direction of the magnetic head and the film. 1. A camera using a film with a magnetic storage section, characterized in that a pressure contact means is provided.