JPH10104721A - Optical instrument - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide an optical instrument capable of laying out a magnetic head member on a cart chamber side, without increasing the scale of the optical instrument such as a camera. SOLUTION: In the optical instrument such as the camera provided with a gate G which is for guiding the top end of the film of a film cartridge 8 and faces a film cartridge chamber 1a and the magnetic head member 5 for writing or reading magnetic information on/from the film 9, the magnetic head member 5 is constituted so that a part of the gate G consists of a part 5a of the magnetic head member. Thus, the magnetic head member can be arranged to overlap with the gate, so that the optical instrument can be reduced in size by the overlap, that is, miniaturized.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an optical apparatus such as a camera for performing information input and output of a photographing film by a magnetic head on a magnetic layer provided on the film, and more particularly to a magnetic head which accommodates a film cartridge. The present invention relates to an optical device arranged on a film cartridge chamber (hereinafter abbreviated as a cart chamber) side.

[0002]

2. Description of the Related Art Conventionally, a photographic film housed in a film cartridge has been provided with a magnetic layer formed thereon. For example, a camera as an optical apparatus which can use the film cartridge is provided with a magnetic layer. A magnetic head for inputting / outputting information to / from the camera is laid out, for example, on the side of the cart room of the camera as shown in FIGS. FIG. 4 is a cross-sectional view of a main part of the camera cut in a horizontal cross-section, and FIG. 5 is a cross-sectional view of a main part of the camera cut in a film surface.
For the sake of simplicity, the magnetic head 45 located behind the camera with respect to the film surface is also illustrated.

Reference numeral 41 denotes a camera body, which holds a photographing optical system (not shown) and a cartridge chamber 41a for accommodating a film cartridge 48 on the left and right sides of a lens barrel unit 43 having a mechanism for performing zooming and focusing.
And a spool chamber 41b in which the photographed film is wound around a spool 42 and stored. The film cartridge 48 stores all the films 49 in the case.
Is stored, and the front end of the film is pushed out from the film entrance by the rotation of the film take-up shaft. A gate G smoothly guides the extruded film tip to a tunnel to be described later, and a gate portion 44a of the film guide member 4.
And the gate portion 41a of the camera body 41, the four surfaces (the front and back sides and the upper and lower sides of the film) are formed in a tapered shape in close proximity to the film entrance and exit of the film cartridge 48.

A film guide member 4 is connected to the gate G to form a tunnel through which a film passes.
And the camera body 41 are formed between the cart room 41a and the spool room 41b. The guide member 4 secures a flat surface of the film in the photographing screen fed in the tunnel.

Reference numeral 45 denotes a magnetic head member for reading out magnetic information recorded on the film and, conversely, recording information from a camera on a magnetic layer on the film. The magnetic head member 45 covers a core around which a coil is wound with a cover.

Reference numeral 46 denotes a pad, and 47 denotes a pad spring. When the pad 46 is pressed against the film by the pad spring 47, the film and the magnetic head 45 come into close contact with each other. It is to be noted that a subject image is optically recorded on the film 49, and information at the time of photographing and information on the film can be input and output as magnetic information.

Here, the constraint conditions regarding the layout of the magnetic head 45 are as follows. First, in the camera having the layout shown in FIG. 4 and FIG. 5, it is essential that the film cartridge be located on the area where magnetic information is recorded, that is, beneath the aperture A (the film cartridge 48 is positioned so that the magnetic layer is on the bottom). By being loaded). And pad 4
6 so that the lens barrel unit 43 does not interfere in the optical axis direction.
The layout is shifted on the magnetic recording area.

When the magnetic head 45 is disposed closer to the cart chamber 41c than the optical axis, the gate portions 41c and 44a
Need to be placed further outside the camera than the magnetic head member 45 in the horizontal direction. That is, the lateral size of the camera on the cart room side is the lens barrel unit 43,
The size was such that the magnetic head member 45, the gate G, and the cart room 41a were arranged so as not to interfere in the lateral direction.

[0009]

However, there are cases where the above-mentioned restraint condition is an obstacle to miniaturization of the camera. In other words, if the camera has no magnetic head member on the cart room side, the size of the lens barrel unit, gate, and cart room is sufficient, but if the magnetic head member is laid out on the cart room side, the camera The size had to be further increased by the size of the magnetic head member.

It is an object of the present invention to provide an optical apparatus in which a magnetic head member can be laid out on a cart room side without increasing the size of an optical apparatus such as a camera.

[0011]

According to a first aspect of the present invention, a gate facing a film cartridge chamber for guiding a leading end of a film of a film cartridge is provided, and magnetic information is written or written on the film. In the optical device having a magnetic head member for reading, the magnetic head member is characterized in that a part of the magnetic head member forms a part of the gate.

According to this structure, the magnetic head member can be arranged so as to overlap the gate, so that the size of the optical device can be reduced accordingly, and the size of the optical device can be reduced.

A second configuration for realizing the object of the invention according to the present application is characterized in that, in the first configuration, a part of the magnetic head member is located at the same plane position as the surface of the gate. Optical equipment.

With this configuration, there is no unevenness on the entire surface of the gate, and the film can be smoothly fed.

According to a third configuration for realizing the object of the invention according to the present application, in the above-described first configuration, a part of the magnetic head member is arranged to be slightly depressed from the surface of the gate. Characteristic optical equipment.

In this configuration, the magnetic head does not protrude into the gate due to the dimensional tolerance of the members constituting the gate, and the film does not get caught when passing through the gate.
Smooth film loading becomes possible.

According to a fourth configuration for realizing the object of the invention according to the present application, in each of the above-described configurations, a part of the magnetic head member is formed by forming a cover of the magnetic head member along the gate. Optical equipment.

In this configuration, a conventional core can be used for the core of the magnetic head member.

According to a fifth configuration for realizing the object of the invention according to the present application, in the first, second or third configuration described above, a part of the magnetic head member includes a core and a cover of the magnetic head member. The optical device is formed in a shape along the gate.

In this configuration, the magnetic head member can be disposed as close to the film cartridge chamber as possible.

When the film passes through the gate, the film does not get caught and the film can be more smoothly loaded.

[0022]

BEST MODE FOR CARRYING OUT THE INVENTION

(First Embodiment) FIG. 1 shows a first embodiment of the present invention.
3 to FIG.

FIG. 1 shows a first embodiment in which the optical apparatus of the present invention is applied to a camera, and FIG.
(B), (c) is a cross-sectional view of the magnetic head member. FIG. 2 is a cross-sectional view in which a magnetic head member originally located behind the film surface is additionally shown in a view of the camera of FIG. 1 cut along the film surface and viewed from the back. FIG. 3 is a magnetic head member of the camera of FIG. 1,
It is the figure which looked at the gate etc. from the camera front.

The camera body 1 holds a photographing optical system (not shown), and holds a film cartridge 8 to the left and right with a lens barrel unit 3 having a mechanism for performing zooming and focusing.
A cartridge chamber 1a for accommodating (having the same structure as that of the film cartridge 48 in FIG. 4) and a spool chamber 1b for accommodating a photographed film wound around the spool 2 and accommodated therein are formed. A gate G smoothly guides the leading end of the film 9 accommodated in the case of the film cartridge 8 to a tunnel described later, and includes a gate portion 4a of the film guide member 4, a gate portion 1c of the camera body 1, Four surfaces (front and back sides and upper and lower sides of the film) are formed in a tapered shape in close proximity to the film entrance and exit of the film cartridge 8 by a chamfered portion 5a of a part of the surface of the magnetic head 5 described later.

The film guide member 4 is connected to the gate G by a tunnel as a guide through which the film passes.
And the camera body 1, the cart room 1a and the spool room 1b
Is formed between. The guide member 4 secures a flat surface of the film in the photographing screen fed in the tunnel.

In the film 9 moving in the tunnel, the vertical movement of the film is restricted by the outer rail surface 1d, and the position of the film in the optical axis direction is changed to the inner rail surface 1e.
The position of the film in the optical axis direction is also regulated by the film guide member 4.
Spool 2 which is the axis for winding the film
Has a built-in film feed motor.

A readable and writable magnetic head member 5 for reading magnetic information written on the film or writing photographic information from the camera to the film is formed by cutting a part of the gate portion 4a of the guide member 4. Missing notch 4
b. The magnetic head member 5 has a portion facing the cutout portion 4b of the guide member 4 and a chamfered portion 5a having the same inclined surface as the gate portion 4a of the guide member 4.
And constitutes a part of the guide G. 5b is a portion where the core of the magnetic head member is exposed for magnetic input / output.

The chamfered portion 5a of the magnetic head member 5 is shown in FIG.
(B), a core 5d around which a coil 5c is wound
The cover 5e may be formed by cutting out a part of the cover 5e, or as shown in FIG. 1 (c), by cutting out both the tip of the core 1d and a part of the cover 1e. it can.

In this embodiment, the chamfered portion 5a of the magnetic head member 5 facing the notch 4b of the guide member 4 is provided at the same surface position as the surface of the gate portion 4a of the guide member 4 without any step.

Reference numeral 6 denotes a pad for bringing the film into close contact with the magnetic head member, and reference numeral 7 denotes a compression pad spring for pressing the pad against the magnetic head member.

According to this embodiment, the magnetic head member 5
The chamfered portion 5a formed by cutting a part of the
a, facing the notch 4b of the guide member 4 so as to face
Since the gate G is configured together with the gate portions 1c and 4a, the magnetic head member 5 can be laid out so as to overlap the guide member 4 and the gate portions 1c and 4a of the camera body 1 that constitute the gate G. It becomes possible. Therefore, the size of the camera in the horizontal direction can be made smaller than that of a conventional camera in which the lens barrel unit, the gate, the magnetic head member, and the cart room are simply arranged.

(Second Embodiment) FIG. 6 shows a second embodiment.

In the present embodiment, the chamfered portion 5a of the magnetic head member 5 facing the notch 4a of the gate portion 4 of the guide member 4
Are laid out at a position slightly deeper than the surface of the notch 4a. Even if a tolerance occurs when the magnetic head member 5 is mounted, it does not protrude into the gate G, and the film 9
The tip is not caught when sending in.

(Correspondence between the Invention and the Embodiment) The film cartridge 8 in the embodiment corresponds to the film cartridge of the present invention, the gate G corresponds to the gate, the magnetic head member 5 corresponds to the magnetic head, and the chamfer. The portion 5a corresponds to a part of the magnetic head member.

Although the above embodiment has been described with reference to an example of a camera as an optical apparatus, the present invention is not limited to this, and a photographed or developed film cartridge is loaded and a magnetic head is mounted. Any optical device that writes and reads information with a member may be used.

[0036]

According to the first aspect of the present invention, the magnetic head member can be disposed so as to overlap the gate, so that the size of the optical device can be reduced accordingly, and the size of the optical device can be reduced. Can be achieved.

According to the second aspect of the present invention, there is no unevenness on the entire surface of the gate, and the film can be smoothly fed.

According to the third aspect of the present invention, the magnetic head does not protrude into the gate due to the dimensional tolerance of the members constituting the gate, and the film does not get caught when passing through the gate, so that the film can be more smoothly loaded. It becomes possible.

According to the fourth aspect of the present invention, a conventional core can be used as the core of the magnetic head member.

According to the fifth aspect of the present invention, the magnetic head member can be arranged as close to the film cartridge chamber as possible.

[Brief description of the drawings]

FIG. 1A is a cross-sectional view of a camera showing a first embodiment of the present invention, and FIGS. 1B and 1C are cross-sectional views of a magnetic head member.

FIG. 2 is a longitudinal sectional view of the camera of FIG.

FIG. 3 is a front view showing a magnetic head member of the camera of FIG. 1 and its periphery.

FIG. 4 is a cross-sectional view of a conventional camera.

FIG. 5 is a longitudinal sectional view of the camera of FIG. 4;

FIG. 6 is a cross-sectional view showing a second embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Main body 1c Gate part 2 Spool 3 Lens barrel unit 4 Guide member 4a Gate part 5 Magnetic head member 6 Pad 8 Film cartridge 9 Film G Gate

Claims (5)

[Claims] 1. An optical apparatus comprising: a gate facing a film cartridge chamber for guiding a front end of a film of a film cartridge; and a magnetic head member for writing or reading magnetic information to or from the film. An optical device, wherein a part of a member forms a part of the gate. 2. The optical apparatus according to claim 1, wherein a part of the magnetic head member is located at the same plane position as a surface of the gate. 3. The optical apparatus according to claim 1, wherein a part of the magnetic head member is disposed slightly depressed from a surface of the gate. 4. The optical apparatus according to claim 1, wherein a part of the magnetic head member has a cover of the magnetic head member formed in a shape along the gate. 5. The optical apparatus according to claim 1, wherein a part of the magnetic head member has a core and a cover of the magnetic head member formed in a shape along the gate.