JPS58120229A - Film for endoscope - Google Patents

Abstract

PURPOSE:To detect accurately various information of a film, by providing a recording material, where information concerning the film which can be read in the camera side is recorded, on the side end face of the film. CONSTITUTION:A conductor 21 having a length l corresponding to the sensitivity of a film 6 is provided on a side end face 6a of the film 6 for every one picture part 13. In the side of a camera 10, the first pulse generator which generates one pulse during short-circuit due to the conductor 21 is provided, and the second pulse generator which generates pulses at constant intervals during the film winding operation is provided, and the number of the second pulses during the first pulse are counted by a counter 18, and this counted value is stored in a storage circuit 19. An exposure controlling circuit 20 in the side of the camera 10 is operated by the output from the storage circuit 19 to set a proper exposure. A reset signal is outputted from the exposure controlling circuit 20 at the end of every phtography, and the counter 18 and the storage circuit 19 are reset by this signal.

Description

[Detailed description of the invention] The present invention relates to a film used in an endoscopic camera.

Generally 1. Cameras must change the exposure state for photography according to the type of photographic film being used, such as ASA sensitivity and color temperature. Conventionally, this has often been done manually. However, with the improvement of technology for observation, photography, diagnosis, etc., various types of photographic film, such as different color temperatures, are required for video cameras for endoscopes, and in situations where they are frequently selected and used. It has become.

Recently, there has been a method that uses mechanical contact means to detect concave or convex portions on the cassette body, but this method has the disadvantage of increasing the size of the camera, and the amount of information it provides. Since it depends on the shape of the concave portion and the convex portion, it was supposed to be greatly limited.

In addition, a reflector is provided as a detected part on the film cassette side, and a photocoupler consisting of a light-emitting element and a light-receiving element is provided on the camera side facing the reflector, and the distance between the photocoupler and the reflector is There is also a method in which the film type is set in advance in accordance with the type of film, and the type of film is detected based on the amount of light incident on the light receiving element, which changes in response to changes in this distance, that is, changes in the optical path length.

However, in this method, the change in the amount of incident light ri1 depends not only on the difference in distance, but also on changes in the amount of light emitted by the light emitting element on the detection side, the state of the reflector, etc. It has been difficult to accurately distinguish and read a large amount of information.

On the other hand, as a means of displaying the number of rolls of film, in addition to the complicated and expensive mechanical counters used in general cameras, methods that detect and display holes or protrusions in the photographic film have also been considered. There is. Since this method directly detects the photographic film, it is an accurate display means with few erroneous displays; however, since the photographic film is provided with a protrusion in the hole, it is difficult to manipulate and is not practical.

Conventional models do not have a display indicating the completion of the photo shoot, so the only way to predict the end of the photo shoot is to look at the counter display. Therefore, when shooting continuously, the photographer often missed important photo opportunities because he did not know that the last piece of the shrimp was near.

The present invention has been made in view of the above-mentioned circumstances, and its purpose is to: provide a recording medium on the side end surface of the film, on which information about the film is recorded; The film tube for round endoscopes is designed so that it can be read on the camera side, making it possible to easily and accurately perform operations such as automatic sensitivity setting, film number display, foot advance, and shooting completion warning. It is about providing.

Hereinafter, each embodiment of the present invention will be described based on the drawings.

The gt diagram and the jIe diagram show a first embodiment of the present invention.

FIG. 1 shows the film cassette 1.

The cassette and main body 2 of this film cassette J are glue and ji 3.
A film supply chamber section 4 and a winding chamber section 5 are provided at both ends via the
The above-mentioned film supply chamber 4 is provided with an unexposed photographic film e.g.
It is stored rolled up. In addition, the feeding side light end (part of the leader) of the photographic film 6 is located in the winding chamber 9 s5.
It is pulled in and is wound and locked on a winding stool (not shown). As shown in FIG. 1, the intermediate portion of the photographic film 6 is exposed to the outside between the film supply chamber 1lS4 and the winding chamber 5. Note that a positioning protrusion 8.9 is provided at the center of each upper surface of the film supply chamber 4 and the winding chamber s5. These protrusions 8 and 9 are connected to the film cassette 1.
This is a round type for positioning when attached to a camera 10i111, which will be described later.

On the other hand, as shown in FIG. 2, the camera 10 is formed with a cassette storage chamber 1 having a shape corresponding to the shape of the film cassette 1, and the cassette body 2 is stored in the photographic film 6 in the cassette storage chamber 1. It can be inserted in the direction of the convergence.

Further, the upper opening of the cassette storage chamber 1 is sealed by a lid 12.

Further, as shown in FIG. 3, on one side end surface 6& of the film 6, a conductor 14 as a recording unit is provided for each screen portion 13 of each frame so as to cross the side end surface.
-ff has been set. The number of conductors J4 stores information about the film 6, such as sensitivity.

Furthermore, when the film cassette 1 is loaded into the cassette storage chamber 11 in the camera 10, one side edge I of the film 6 is
A pair of contact pieces 1 as shown in FIG.
A detection switch 16 consisting of 5.15 is provided,
As shown in FIG. 5, as the film winds up, as the conductor 14 passes, the contact piece 15 passes through the conductor 14.
, IB are made conductive. Further, this detection switch 16 is connected to a pulse generator 17 which generates one pulse when the contact piece 15 T 15 becomes conductive.

The /4' pulse from the t4 pulse generator 17 is counted by the counter 18 as shown in FIG.
9 is input and stored. Then, the exposure control circuit 20 on the side of the camera camera 10 is activated by the output from the memory circuit 19, and an appropriate exposure value is set. In addition, the exposure control circuit 2
From 0, a reset signal is issued every time one photographing is completed, and the counter 18 and the memory circuit 19 are reset.

7 and 8 show a second embodiment of the present invention. In this embodiment, a conductor 21 with a length l corresponding to the sensitivity of the film 6 is attached to the side end surface 61 of the film 6. This is provided for each screen section 13. Further, the camera 10@ is provided with a first pulse generator that generates 1 nof pulse while being short-circuited by the conductor 21, and a second pulse generator that generates nof pulses at regular intervals during film winding operation. A generator is provided to generate a second, -4 during the first noyals.
The counter 18 counts how many loops there are, and the memory circuit 1
9 will be manually operated. Then, the exposure control circuit 20 in the camera 101111 is activated by the output from the memory circuit 19, and is set to an appropriate fog output value. Also,
The exposure control circuit 20 outputs a reset signal every time a photograph is completed, and the counter 18 and the storage circuit 1-9
is reset.

In addition, in each of the above implementations, 4 electric bodies 14.21 are used as recording bodies.
However, the present invention is not limited to this. As shown in FIG. 6 is stored magnetically, and the information is stored magnetically in the camera 10914.

It may be read using a card or a Hall element, and exposure control etc. may be performed in the same manner as described above.

Further, FIG. 10 shows a method of attaching the conductor 14 or the magnetic body 22, in which the same films 6 are superimposed and the conductor 14 or the magnetic body 22 is attached at once. This makes it easy to attach the conductor 14 and the like.

As explained above, the side end face of the expanded film of the present invention is provided with a recording body storing information about the film that can be read by the camera. therefore,
On the camera side, by reading the information on the recording medium, operations such as automatic setting of ASA sensitivity, display of the number of films, fixed length feed, and notification of shooting completion cost can be performed easily and accurately. Furthermore, since the recording medium is provided using the side end surface of the film, the entire surface of the film can be used as a photographing surface. Furthermore, the reading space is not so necessary, making the arrangement more convenient.Furthermore, since the film side can be made single, costs can be reduced.

Even if the camera is removed from the endoscope or the film cassette is removed from the camera in the middle of taking a picture, the information will be sent to the camera again the next time the picture is taken.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of a film cassette showing a first embodiment of the present invention, FIG. 2 is a perspective view of a camera into which the film cassette is loaded, and FIG. 3 is a perspective view of the film.
FIG. 4 is a perspective view of the detection switch, FIG. 5 is a diagram of the lateral switch in its operating state, FIG. 6 is its electric circuit, and FIG. 7 is a second embodiment of the present invention. The perspective view of the film shown in FIG. 8 is also its electric circuit diagram, FIG.
The figure shows the third embodiment of the present invention: 6...film, 10...
...Camera, 14...Electric conductor, 16...Detection switch, 2)...Electric conductor, 22...Magnetic material. Applicant's representative Patent attorney Takehiko Suzue Figure 1 Figure 2 Figure 4 Figure 5 Figure 7111 3 Figure 81111 Figure 9 Continued from page 1 0 Inventor Tsuguhisa Sasai 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 Lymphus Optical Industry Co., Ltd. Inventor Takeaki Nakamura 2-43 Hatagaya, Shibuya-ku, Tokyo No. 2 Lymphus Optical Industry Co., Ltd. Inventor Ken Sugawara 2-43 Hatagaya, Shibuya-ku, Tokyo Number 2: 157- inside Lymphus Optical Industry Co., Ltd.

Claims (2)

[Claims] (1) An endoscope film characterized by having a recording body on the side edge surface of the film recording information about the film that is read by a camera. (2) The film for an endoscope according to claim 1, wherein the recording material is a conductor. (3) The film for an endoscope according to claim 1, wherein the recording material is a magnetic material.