JPH04285934A - Camera using film with magnetic storage part - Google Patents

Abstract

PURPOSE:To stably position a magnetic head and a film even when the tension of the film is changed, and to wind the film to a film spool in good order. CONSTITUTION:A 1st guiding member which regulates the position of one end face of the film 5 in a width direction is arranged on opposed sides which hold the film between them so that it can be moved in the width direction of the film, and a 2nd guiding member 9 which abuts on the other end face of the film in the width direction and an elastic member which is coupled between the 2nd guiding member and the magnetic head 1 and which interposes both end faces of the film in the width direction by pressing the 2nd guiding member toward the 1st guiding member are provided.

Description

[Detailed description of the invention]

0001

[Industrial Application Field] The present invention relates to a camera that uses a film with a magnetic memory section, which is equipped with a magnetic head that writes and reads information such as shutter speed and aperture value in a magnetic memory section of the film. This is related to the improvement of

0002

[Prior Art] In recent years, films equipped with a magnetic storage area are used, and shooting information such as shutter speed, aperture value, date, title, etc. is written in this magnetic storage area using a magnetic head, and the information can be recorded as needed. A camera that reads out this photographic information has been proposed in US Pat. No. 4,864,332 and the like.

The magnetic storage section is arranged at a predetermined position parallel to the longitudinal direction of the film, and as the amount of information being written and read increases, the magnetic head must always be accurately positioned at the predetermined position on the film. There is.

[0004] To achieve this, a structure is proposed in which a guide section is provided integrally with the magnetic head, and the guide section is always pressed against the end surface of the film with an elastic member such as a spring, thereby positioning the magnetic head and the magnetic storage section of the film. Conceivable.

5 to 7 show conventional examples, FIG. 5 is a perspective view seen from the film surface when the film is passing through the magnetic head section, FIG. 6 is a rear view when there is no film, and FIG. is a rear perspective view without a film.

In these figures, 101 is a magnetic head, 101a is a magnetic gap, and 102 is a magnetic head 101.
103 is a guide member that is fixed to the magnetic head and can come into contact with the end surface of the film; 104 is a pressure plate fixed to a camera body (not shown); 105 is a magnetic storage unit provided on the pressure plate 104 side; The film is fed in the direction of arrow A in FIG.

Reference numerals 106 and 107 denote support rods, one end of which is fixed to the holding portion 104a of the pressure plate 104, and the fitting holes 102a and 102b of the head mounting base 102 are connected to the support rods 10.
6,107 so as to be slidable. 108,109
is a spring that is attached at one end to the head mount 102 and at the other end to the holding portion 104b of the pressure plate 104, and biases the head mount 102 downward. 104a is a stopper that can come into contact with the magnetic head 101 and regulates its downward position.

[0008]

In the conventional example described above, since the guide member 103 presses only one end surface of the film 105, there are the following problems.

1) The amount of deflection of the film 105 changes depending on the tension between the camera spool and the film cartridge. When the tension of the film 105 changes during film feeding, the inertial mass of the magnetic head 101 and the like alternately generates a force that pulls the guide member 103 integrated with the magnetic head 101 away from the end surface of the film and a force that presses it. However, the positioning of the magnetic head 101 and the film 105 due to the abutment of the guide member 103 becomes extremely unstable.

2) Since the film 105 is always subjected to a force in a fixed direction by the guide member 103, the film 10
When the film 5 is wound onto the camera's film spool, it does not wind up in a natural manner, resulting in what is called a loose winding state, increasing the possibility that autoloading will fail.

SUMMARY OF THE INVENTION In view of the above-mentioned points, an object of the present invention is to stably position a magnetic head and a film even if the tension of the film changes, and to wind the film around a film spool in an orderly manner. It is an object of the present invention to provide a camera using a film with a magnetic storage section that can be used.

0012

[Means for Solving the Problems] The present invention provides a first guide member that regulates the position of one end surface in the width direction of the film, and a first guide member that is movable in the width direction of the film and on the opposite side of the film. a second guide member that is arranged and comes into contact with the other end surface in the width direction of the film, and a second guide member that is coupled between the second guide member and the magnetic head, and that connects the second guide member to the first guide member. An elastic member is provided which is biased in the direction of and pinches both end faces of the film in the width direction.

[0013]

[Operation] The elastic member is connected between the second guide member and the magnetic head, and urges the second guide member in the direction of the first guide member to sandwich both widthwise end surfaces of the film. A biasing force for regulating the position of the film is applied to each of both end faces of the film.

[0014]

Embodiment FIGS. 1 and 2 show a first embodiment of the present invention. In these figures, 1 is a magnetic head;
a is a magnetic gap, 2 is a head mounting base to which the magnetic head 1 is fixed, 3 is a first guide member that is fixed to the magnetic head 1 and can come into contact with the end surface of the film, and 4 is fixed to a camera body (not shown). The pressure plate 5 is a film having a magnetic memory section provided on the pressure plate 4 side, and is fed in the direction of arrow A in FIG. Reference numerals 6 and 7 indicate support rods, one end of which is fixed to the convex portions 4a and 4b of the pressure plate 4, respectively, and the fitting holes 2 of the head mounting base 2.
a and 2b are slidably fitted to the support rods 6 and 7.

Reference numeral 8 denotes a guide lever, which is attached to the head mounting base 2 with elongated holes 8a and 8b slidably fitted into protrusions 2c and 2d, respectively. A second guide member 9 is fixed to the guide lever 8 and can come into contact with the end surface of the film. 10 is a tension spring, one end of which is attached to the head mounting base 2.
The other end is attached to the guide lever 8.

In the above structure, when the film 5 is not present, the guide lever 8 has the elongated holes 8b and 8a in contact with the protrusions 2c and 2d due to the biasing force of the spring 10, so that the head is not attached. The relative position with the stand 2 is determined. In this state, the distance between the first guide member 3 and the second guide member 9 is smaller than the width of the film 5.

When the film 5 passes as shown in FIG.
The magnetic head 1 is positioned with respect to the film 5 by sandwiching the film in the width direction by an urging force.

Since the film 5 receives force from both the first guide member 3 and the second guide member 9, it does not receive force from either one in particular.

FIGS. 3 and 4 show a second embodiment of the present invention, and the same parts as in FIGS. 1 and 2 are designated by the same reference numerals.

Reference numeral 11 denotes an elastic member made of a flexible material such as a leaf spring, which is fixed to the head mounting base 2 at one end 11a.
The convex portion 11b serves as a second guide portion. This elastic member 11 uses its own flexibility and elasticity to sandwich the film 5 in the width direction between the convex portion 11b serving as a second guide member and the first guide member 3, thereby positioning the magnetic head 1 and the film 5. It is carried out.

According to each of the embodiments described above, the first guide member 3 is integrally constructed with the magnetic head 1 and can come into contact with one end surface of the film 5 in the width direction, and the other end face of the film 5 in the width direction a second guide member 9, 11b that comes into contact with the end surface of the second guide member 9, 11b;
Since the first and second guide members 3 are provided with a spring 10 or an elastic member 11 that movably urges and pinches both end surfaces of the film 5, the film can be pressed only in one direction. Even if the tension of the film 5 changes, the magnetic head 1 can be stably positioned with the film 5, and the film 5 can be wound on the spool of the camera in an orderly manner.

[0022]

[Effects of the Invention] As explained above, according to the present invention,
The first guide member that regulates the position of one end surface in the width direction of the film is disposed on opposite sides of the film and movable in the width direction of the film, and is in contact with the other end surface in the width direction of the film. a second guide member in contact with the magnetic head; the second guide member is coupled between the second guide member and the magnetic head, and the second guide member is urged in the direction of the first guide member so that both ends of the film in the width direction are connected; An elastic member is provided to sandwich the surface,
A biasing force for regulating the position of the film is applied to each of both end faces of the film. Therefore, even if the tension of the film changes, the magnetic head and the film can be stably positioned, and the film can be wound around the film spool in an orderly manner.

[Brief explanation of the drawing]

FIG. 1 is a perspective view showing the main part configuration of a camera in a first embodiment of the present invention.

FIG. 2 is a rear view of FIG. 1;

FIG. 3 is a perspective view showing the main part configuration of a camera according to a second embodiment of the present invention.

FIG. 4 is a rear view of FIG. 3;

FIG. 5 is a perspective view of a conventional camera showing the configuration of parts related to the present invention.

FIG. 6 is a rear view of FIG. 5;

FIG. 7 is a perspective view from the back of FIG. 5;

[Explanation of sign]

1 Magnetic head 2 Head mounting base 3 First guide member 4 Pressure plate 5 Film 8 Guide lever 9 Second guide member 10 Spring 11 Elastic member 11b Second guide member

Claims (1)

[Claims] 1. A magnetic head configured to be movable in a direction perpendicular to the film running direction on a plane parallel to the film surface and for writing or reading information to a magnetic storage section provided on the film, and the magnetic head. A camera using a film with a magnetic storage unit, which is integrally configured with a first guide member that regulates the position of one end surface in the width direction of the film, the first guide member being a second guide member disposed on opposite sides of the film so as to be movable in the width direction of the film and in contact with the other end surface of the film in the width direction; the second guide member and the magnetic head; and an elastic member coupled between the magnetic storage unit and the elastic member that biases the second guide member in the direction of the first guide member to sandwich both end faces of the film in the width direction. A camera that uses attached film.