JPH07181591A - Camera with magnetic head - Google Patents

Abstract

PURPOSE:To provide a camera with a magnetic head capable of surely executing automatic loading by smoothly feeding a film reader part to a film take-up reel and surely winding the film reader part on the film take-up reel. CONSTITUTION:The camera with the magnetic head having a magnetic head 11 performing at least recording or reproducing photographing information on the edge part of a film coated with a transparent magnetic layer is provided with guiding members 12 and 15 having a curved guiding part allowing the film provided in the vicinity of an aperture to travel to the place nearer to a photographic lens than its focusing plane while describing an arc, the magnetic head 11 whose gap disposed on the rear cover side of the guiding members 12 and 15 is protruded into the curved guiding part and the film take-up reel 2 arranged on the side nearer to the photographic lens than a plane 20 in contact with both of the surface having the gap of the magnetic head 11 and the edge part on the side of the film take-up reel of the guiding member 15.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a camera having a built-in magnetic head for recording or reproducing at least various information used for photographing in a magnetic layer of a film coated with a transparent magnetic layer.

[0002]

2. Description of the Related Art In recent years, in a magnetic layer of a film coated with a transparent magnetic layer, various information used for photographing, such as shutter speed, aperture value, shooting distance, presence / absence of flash photography, presence / absence of backlight, date and time, etc. There has been proposed a camera having a built-in magnetic head that performs either recording or reproducing. For example, Japanese Patent Laid-Open No. 4-504316, Japanese Patent Laid-Open No. 3-202830, and Japanese Utility Model Laid-Open No. 4-
There is 89934 publication.

In Japanese Patent Laid-Open No. 4-504316, a head is fixed to a film platen (pressure plate), a guide surface is provided on at least one of the platens, and the platen is engaged with the edge of the film to bias the platen at right angles to the longitudinal direction of the film. Then, the platen is engaged with the film, and the platen is held by the three slide recesses so that the platen can move in parallel.

JP-A-3-202830 discloses that a head is fixed to a pressure plate, and guide portions are provided at both ends of the pressure plate. The pressure plate is movable in a direction perpendicular to the film traveling direction and is rotated on a plane parallel to the film surface. It is possible to move.

In Japanese Utility Model Laid-Open No. 4-89934, a head is rotatably fixed to a pressure plate, exposed to the film side through a hole of the pressure plate, and a roller is provided on the facing surface of the head.

And, Japanese Patent Application No. 5-79765 filed by the applicant.
In Japanese Patent Laid-Open No. 2003-242242, a compact camera with a magnetic head, which solves the problems of the above-mentioned technology, can obtain a good contact between the magnetic head gap and the magnetic surface, has a small film feeding load, and filed. This is a magnetic head provided with a curved guide member for moving a film coated with a transparent magnetic layer in an arc from the focusing surface of the photographing lens to the photographing lens side in the vicinity of the aperture and arranged on the back cover side of the guide member. This is achieved by projecting the gap of (1) into the curved surface guide portion.

[0007]

SUMMARY OF THE INVENTION In a camera with a magnetic head to which the above-mentioned Japanese Patent Application No. 5-79765 filed by the present applicant is applied, the present invention has been made in order to further increase the certainty of autoloading. is there. That is, it is an object of the present invention to provide a camera with a magnetic head in which the film leader section is smoothly fed to the film take-up reel, and the film leader section is surely wound around the film take-up reel to surely perform autoloading. Is.

[0008]

The object is to provide a camera with a magnetic head having a magnetic head for recording or reproducing at least photographic information at the edge of a film coated with a transparent magnetic layer, in the vicinity of an aperture. A guide member having a curved surface guide portion for moving the film provided on the photographing lens side in an arc from the focus surface of the photographing lens, and a gap provided on the back cover side of the guide member to form the curved surface guide. And a film take-up reel disposed on the photographing lens side with respect to a plane that contacts both the surface having the gap of the magnetic head and the end of the guide member on the film take-up reel side. And a magnetic head-equipped camera.

[0009]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to FIGS.

FIG. 1 is a perspective view of a camera with a magnetic head as viewed from the rear, and FIG. 2 is a partially enlarged view of a film guide portion.

Reference numeral 1 is a camera body, and 1a is an aperture forming a photographing image frame. F is a film coated with a transparent magnetic layer, which is stored in the cartridge P before photographing. The cartridge P is stored in the cartridge chamber 1b of the main body 1, and the film F sent from the cartridge P by a known winding mechanism passes through the aperture 1a and is wound on the reel 2 which is a film winding reel.

Reference numeral 3 denotes a pressure plate, which is attached to a back cover (not shown) and is provided with a predetermined plate plate spring (not shown) on the rail surface 16a, 16b, 17a, 17b to provide a predetermined gap through which the film F passes. It is crimped. Reference numeral 11 denotes a magnetic head, which records or reproduces at least photographing information on the magnetic layer of the film F. Magnetic head 11 is pressure plate 3
Independently from the above, a hole provided on the side surface of the upper guide 12 is inserted into the through hole 12a of the upper guide 12 provided near the pressure plate 3.
It is held by the pins 13 and 14 inserted from 12b and faces the end of the film F. The upper guide 12 may be integrated with the pressure plate 3.

Reference numeral 15 denotes a lower guide provided on the camera body 1, which is shown integrally with the body 1 in FIG.
You may assemble a different component from the main body 1. When the upper guide 12 is attached to the lower guide 15, the upper guide 12 and the lower guide 15 are in close contact with each other at both ends, and in the film running portion, as shown in FIG. The film guide portion is formed. Further, the magnetic head 11 projects slightly from the curved guide surface of the upper guide 12, and is always in reliable contact with the film F at the gap portion at the tip of the head.

The reel 2 is arranged closer to the photographing lens than a plane 20 which is in contact with both the surface having the gap of the magnetic head and the end of the lower guide 15 which is the guide member on the reel 2 side which is the film winding reel. There is.

With this configuration, the leader portion of the film F sent from the cartridge P at the time of automatic loading has the pressure plate 3 and the rail surfaces 16a, 16b, 17.
The gap formed by a and 17b, the upper guide 12 and the lower guide 15
While being in contact with the magnetic head 11 by the curved surface guide portion formed by and wound around the curved surface of the head gap portion, it travels and is smoothly fed to the upper portion of the reel 2 without contacting the reel 2.

As a result, the leader portion of the film F can be securely wound around the reel 2 by the well-known claw 2H or the rubber type reel 2 and the film guide rollers 18 and 19. Further, since the magnetic head 11 can rotate about the pins 13 and 14 as a fulcrum at right angles to the film running direction, it is possible to cope with the positional deviation of the film. The magnetic head 11
In order to balance on the film F, one may be provided at each end of the film, but one magnetic head may be a dummy whose shape is similar to that of the magnetic head in order to avoid cost increase.

[0017]

As described above, the camera with the magnetic head of the present invention has the following effects.

Since the film rolls around the curved surface of the head gap and runs, curling and curling of the film in this part are reduced, and in combination with the rolling property of the head (rotation at a right angle to the film running direction), Good contact with the magnetic surface of the film is possible, and reliable magnetic recording and reproduction are possible.

By the above-mentioned curved winding traveling, the tolerance of the mounting position of the head gap and the angular accuracy can be increased.

It is possible to secure a space for mounting the head in the thickness direction of the camera, which is in contact with the magnetic surface of the film (the back surface of the emulsion surface) running in the small camera.

A constant space is always secured in the curved surface guide portion including the head, and it is easy to pass the leading edge of the film when loading the film.

The leader portion at the leading end of the film during film loading can be securely wound around the reel without coming into contact with the reel.

It is not necessary to retract the head facing pad or the roller at the time of loading or photographing.

[Brief description of drawings]

FIG. 1 is a rear perspective view of a camera with a magnetic head.

FIG. 2 is a partially enlarged view of a film guide portion.

[Explanation of symbols]

 1 camera body 2 reel 3 pressure plate 11 magnetic head 12 upper guide 15 lower guide F film

Claims (1)

[Claims] 1. A camera with a magnetic head having a magnetic head for recording or reproducing at least photographic information at the edge of the film coated with a transparent magnetic layer, the film provided near the aperture is photographed. A guide member having a curved guide portion that travels in an arc from the focusing surface of the lens to the photographing lens side, and the magnetic head in which a gap provided on the case back side of the guide member is projected into the curved guide portion. And a film take-up reel disposed on the side of the photographing lens with respect to a plane contacting both the surface of the magnetic head having the gap and the end of the guide member on the side of the film take-up reel. Camera with magnetic head.