JPH1184587A - Film cassette for endoscope - Google Patents

Abstract

PROBLEM TO BE SOLVED: To surely read information for identification of a film, on the side of a camera by preventing the occurrence of failure such as a defect in a contact. SOLUTION: This cassette 1 is provided with a film supplying part 2 loaded with the unexposed part of the film 4 and a film take-up part 3 which takes up the film 4 supplied from the film supplying part 2. Then, the film supplying part 2 and the film take-up part 3 are provided with a certain interval, so as to form a film exposing part between the film supplying part 2 and the film take-up part 3 and their bottom parts are connected by a bridge 5. An outer and inner cylinders 6 and 7 are provide din the film take-up part 3, to form the spool, the inner cylinder 7 can be moved in the axial direction of the spool and a magnet 9 for detection of the film is provided in the inner cylinder 7.

Description

DETAILED DESCRIPTION OF THE INVENTION

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope film cassette which is used by being mounted on an endoscope camera.

[0002]

2. Description of the Related Art In endoscope films, in recent years, there has been a need to increase the quality of an endoscope image so as to make the film emulsion finer and to increase the sensitivity so that it can be photographed even in a dark illumination device. I have.

In a conventional endoscope photographing apparatus, for example, as disclosed in Japanese Patent Application Laid-Open No. 2-108042,
There is a method in which an electric element such as a fixed resistor is provided in a film cassette, the difference in the characteristic value is read, the type of film is identified, and the number of films, film sensitivity, film type, color temperature type, etc. are read by a camera. Was used. However, in such a film identification method, since it is necessary to provide two or more electrical contacts between the film cassette and the camera, the configuration of the electrical circuit for identification becomes complicated, and temperature, humidity, dust, dust, etc. There is a problem that a contact failure may occur due to a target element, and there is a risk that the identification of the film may be erroneously performed on the camera side and the film characteristics or the like may be erroneously set.

In a general camera, a DX code method is generally used as a method for reading film information. However, in this method, it is necessary to provide a DX code on the surface of the film cassette, so that the film cassette becomes large. However, it is difficult to apply the present invention to a small film cassette to be loaded in an endoscope camera.

[0005]

As described above, the conventional endoscopic photographing apparatus employs a configuration in which electrical contacts are provided on the film cassette side and the camera side for film identification. In such a configuration, there is a problem that a problem such as a contact failure may occur and the camera may erroneously identify the contact.

SUMMARY OF THE INVENTION The present invention has been made in view of the above circumstances, and it is possible to prevent a problem such as a contact failure from occurring, and to be able to reliably read information for film identification on a camera side. It is intended to provide cassettes.

[0007]

According to the present invention, there is provided an endoscope film cassette to be mounted on an endoscope camera, wherein the film cassette comprises a film supply section containing an unexposed film, A film winding unit that is provided at an interval so as to form a film exposure unit between the unit and the film supply unit that winds a film supplied from the film supply unit, and connects the film supply unit and the film winding unit. A bridge portion, and inside the film winding portion, an outer cylinder for film winding, and an inner cylinder for the endoscope which is disposed inside the outer cylinder so as to be movable in the axial direction of the outer cylinder. A spool having a two-body structure with an inner cylinder having an engagement portion that engages with a winding shaft of the camera,
A magnet for detecting a film is provided in the inner cylinder.

[0008]

Embodiments of the present invention will be described below with reference to the drawings. FIGS. 1 to 4 relate to an embodiment of the present invention, FIG. 1 is a top view showing an external configuration of a film cassette, FIG. 2 is a side view showing an external configuration of the film cassette, and FIG. FIG. 4 is a block diagram showing a schematic configuration of an endoscope camera.

An endoscope film cassette (hereinafter, simply referred to as a film cassette) 1 according to the present embodiment is used by being mounted on an endoscope camera, as shown in FIGS. A substantially cylindrical film supply unit 2 and a film winding unit 3 are provided at an interval so as to form a film exposure unit therebetween, and their bottoms are connected by a bridge 5. In the initial state, the unexposed portion of the film 4 is wound and stored on the film supply unit 2 side, and the film 4 supplied from the film supply unit 2 is wound into the film winding unit 3. .

Inside the film winding section 3, an outer cylinder 6 and an inner cylinder 7 which form a spool for winding the film 4 are provided. Inside the outer cylinder 6, the inner cylinder 7 is engaged with the winding direction. I agree. The inner cylinder 7 is slidable in the outer cylinder 6 along the rotation axis direction, and an upper end of the inner cylinder 7 is engaged with a winding member provided in an endoscope camera. A joint 8 is formed. Further, a magnet 9 is provided in the inner cylinder 7.

FIG. 4 shows a schematic configuration of an endoscope camera 11 into which the film cassette 1 is loaded. Endoscope camera 11
Is configured such that a subject image is formed on the film 4 of the film cassette 1 by the lens 12 and exposed based on predetermined photographing conditions. Inside the endoscope camera 11, a coil 13 is provided in a film loading section, and each is arranged at a position where the magnet 9 and the coil 13 become the shortest distance when the film cassette 1 is loaded.

The coil 13 includes a coil current amplifier 1
4 is connected, and the coil current amplifier 14 converts the current flowing through the coil 13 into a voltage, and amplifies the voltage to a predetermined voltage. Coil current amplifier 1
4 is connected to a film identification circuit 15, to which a control circuit 16 is connected. The output of the coil current amplifier 14 is
5, the type of film is identified. Based on the identified type of film, the control circuit 16 determines, for example, shooting conditions or the like corresponding to the film sensitivity, drives the aperture 17, and drives the aperture 17 to a predetermined aperture value. Exposure control is performed in such a manner.

Next, the main operation of the present embodiment will be described.
When the film cassette 1 is loaded into the endoscope camera 11 and the back cover is closed, a push-up pin (not shown) provided on the camera pushes up the inner cylinder 7 of the film winding section 3 from the bottom side, and the upper end of the inner cylinder 7 The engaging portion 8 of the portion engages with a winding member (not shown) provided on the camera. At this time, when the inner cylinder 7 slides in the spool axis direction, electromagnetic induction occurs between the magnet 9 inside the inner cylinder 7 and the coil 13 of the endoscope camera 11, whereby the coil 1
3 generates an electromotive force.

At this time, by changing the size or magnetic force of the magnet 9 depending on the type of film, the coil 1
Since the electromotive force generated in 3 changes, film type information can be stored for each film cassette.

The current flowing through the coil 13 is converted into a voltage by the coil current amplifier 14 and amplified, and the output is input to the film identification circuit 15 so that
Information of the film cassette 1 is transmitted to the camera. The film identification circuit 15 is composed of a comparator or an A / D converter for determining whether the output value of the coil current amplifier 14 is higher than the reference voltage value, and has correspondence information between the determination result and the film type. The type of the film is detected and identified based on the magnitude of the electromotive force of the coil 13. At this time, on the camera side, the control circuit 16 determines whether or not the film information has been identified, and after the film information has been identified, sends an operation start instruction to each unit to activate the camera.

The control circuit 16 drives the diaphragm 17 to adjust the amount of light incident from the lens 12 based on the type of the film identified by the film identification circuit 14. Thus, when it is determined that the sensitivity of the loaded film is low, the aperture 17 is slightly opened, and when it is determined that the film sensitivity is high, the aperture 17 is slightly closed. Done in Then, the shutter is opened and closed while feeding the film 4 one frame at a time, and a photograph is taken by exposing a subject image onto the film 4.

According to this embodiment, a magnet is provided in the inner cylinder of the film cassette, and an electromotive force is generated in the coil on the camera side when the film is loaded and detected. The film information can be transmitted to the camera with an inexpensive structure, and the film information can be reliably detected and identified on the camera side.

Further, in the configuration of the present embodiment, since no electric contacts or the like are used as in the prior art, it is possible to prevent the occurrence of troubles such as defective contacts even when used in a poor environment such as high temperature and high humidity. As a result, erroneous determination of film identification does not occur, and reliable film identification is possible.

[Supplementary Notes] (1) In an endoscope film cassette to be loaded in an endoscope camera, the film cassette is provided between a film supply section containing an unexposed film and the film supply section. A film winding unit that is provided at intervals so as to form a film exposure unit and winds the film supplied from the film supply unit inside, and a bridge unit that connects the film supply unit and the film winding unit. Inside the film winding section, an outer cylinder for film winding, and a winding shaft of an endoscope camera which is disposed inside the outer cylinder so as to be movable in the axial direction of the outer cylinder. An endoscope film, comprising: a spool having a two-body structure with an inner cylinder having an engaging portion engaged with the inner cylinder, wherein a magnet for detecting a film is provided in the inner cylinder. Set.

(2) The endoscope film cassette according to appendix 1, wherein the magnet can obtain film information for identifying a film type by changing a size or a magnetic force. .

(3) A film supply unit containing an unexposed film and a film exposure unit provided at an interval between the film supply unit and the film supply unit. A film winding section, and a bridge section connecting the film supply section and the film winding section. Inside the film winding section, an outer cylinder for film winding, An inner cylinder having an engagement portion disposed inside the cylinder so as to be movable in an axial direction of the outer cylinder and having an engagement portion engaged with a winding shaft of an endoscope camera; An endoscope film cassette internally provided with a magnet for film detection, and the endoscope film cassette is loaded to perform photographing, and when loading the endoscope film cassette, A coil disposed in the vicinity of the magnet, a power amplifier for amplifying an electromotive force generated by electromagnetic induction in the coil when the magnet slides with the inner cylinder, and a power amplifier based on an output of the power amplifier. An endoscope camera, comprising: an endoscope camera having a film identification circuit for identifying film information on a film in an endoscope film cassette.

(4) The electromotive force generated in the coil is changed by changing the size or magnetic force of the magnet to obtain film information for identifying a film type. Endoscope imaging device.

(5) In an endoscope camera which mounts an endoscope film cassette having a built-in magnet and performs photographing, in the vicinity of the magnet of the endoscope film cassette when the endoscope film cassette is loaded. A power amplifier that amplifies an electromotive force generated in the coil by electromagnetic induction between the magnet and the coil, and a film in the endoscope film cassette based on an output of the power amplifier. An endoscope camera, comprising: a film identification circuit for identifying film information.

[0024]

As described above, according to the present invention, it is possible to prevent the occurrence of a defect such as a contact failure and to reliably read information for identifying a film on the camera side. There is an effect that can be provided.

[Brief description of the drawings]

FIG. 1 is a top view showing an external configuration of a film cassette according to an embodiment of the present invention.

FIG. 2 is a side view showing an external configuration of a film cassette.

FIG. 3 is an exploded perspective view showing an internal configuration of a film winding section of the film cassette.

FIG. 4 is a block diagram showing a schematic configuration of an endoscope camera;

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Film cassette 2 ... Film supply part 3 ... Film winding part 4 ... Film 5 ... Bridge 6 ... Outer cylinder 7 ... Inner cylinder 9 ... Magnet 11 ... Endoscope camera 13 ... Coil 14 ... Coil current amplifier 15 ... Film identification Circuit 16 ... Control circuit 17 ... Aperture

Continued on the front page (72) Inventor Ryoichi Hosoya 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Industrial Co., Ltd. (72) Inventor Kazuma Kaneko 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Inside Optical Industry Co., Ltd. (72) Inventor Tomohiko Oda 2-43-2 Hatagaya, Shibuya-ku, Tokyo Oripus Optical Industry Co., Ltd. (72) Takeaki Nakamura 2-43-2 Hatagaya, Shibuya-ku, Tokyo Ori Inside of Opus Optical Co., Ltd.

Claims (1)

[Claims] 1. An endoscope film cassette to be loaded into an endoscope camera, wherein the film cassette comprises a film supply unit containing an unexposed film, and a film exposure unit provided between the film supply unit and the film supply unit. A film winding section provided at intervals so as to form a film supplied from the film supply section, and a bridge section connecting the film supply section and the film winding section. Inside the film winding section, an outer cylinder for film winding and an inner cylinder inside the outer cylinder are movably arranged in the axial direction of the outer cylinder and engage with a winding shaft of an endoscope camera. An endoscope film cassette, comprising: a spool having a two-body structure with an inner cylinder having an engaging portion, wherein a magnet for detecting a film is provided in the inner cylinder.