JPH0322604B2 - - Google Patents

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an endoscope photographing device comprising a long photosensitive film and an endoscope camera that images an image on the film.

Generally, 16 mm photosensitive film is used for endoscope cameras. This 16mm
Previously, only one type of film was available: 20 frames. Nowadays, long films with more than 20 frames, such as 40 frames or 60 frames, are being released.
There is an increasing demand for the use of stop motion film.

However, automatic developing systems and filing systems for photographed film have already been standardized for 20 frames and are fully equipped in countries around the world. Therefore, newly providing each system for long lengths is very complicated and brings about an unnecessary increase in cost.

Therefore, it is possible to cut out a long film every 20 frames. However, the above-mentioned cutting operation had to be carried out in a dark room, and it was not possible to determine where every 20 frames were to be cut. Therefore, it is possible to measure and cut out the length of 20 frames, but since the shooting start position is set arbitrarily,
There is a risk that the ends of the 20 pieces measured may touch other pieces.

This invention was made in view of the above circumstances,
It is an object of the present invention to provide an endoscope photographing device equipped with a film feeding device capable of transporting photosensitive film so as to reliably cut each block in a dark room.

DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of an endoscope imaging device according to the present invention will be described in detail below with reference to the accompanying drawings. This photographing device is composed of a long photosensitive film and an endoscope camera.

FIG. 1 shows an endoscope camera 12 that houses a film cassette 10 therein and is attached to an endoscope 14, which includes an operating section 16 and an operating section 16. an insertion section 18 made of a flexible tube and having an irradiation window and an observation window at its tip, and a light source that generates photographing light or a target for illumination that illuminates the subject area irradiated from the irradiation window. A device 20, this light source device 20, and the operation section 16
and a guide section 22 that connects the two. An eyepiece section 24 is provided on the side opposite to the side where the insertion section 18 of the operation section 16 is provided, and the eyepiece section 24 includes the endoscope camera 1.
2 is installed. An image guide (not shown) that connects the observation window and the eyepiece is provided in the insertion section 18, and this image guide passes the image of the subject obtained through the observation window through the image guide. It is for guiding to the eyepiece section 24. Further, a light guide that connects the irradiation window and the light source device 20 is provided in the insertion portion 18 and the guide portion 22, and this light guide receives photographing light or collation light from the light source device 20. This is to guide the subject through the irradiation window.

As shown in FIG. 2, an aperture 26 is provided on the photosensitive surface side of the long photosensitive film 28 of the film cassette 10, and the image of the subject is captured within this aperture 26 by a photographing lens (not shown). An image is formed on the photosensitive surface of the positioned film 28. One end of the film 28 is fixedly attached to a film winding shaft (not shown) so that it can be wound up by rotation of the film winding shaft. This film winding shaft is the film feeder 3 of the camera shown in FIG.
0, the film 28 is wound in the right direction as indicated by the arrow A in the figure in one winding operation by the length of the opening 26.

This film 28 is formed for so-called 40 frames, having twice the length of the conventional film for 20 frames, and has a notch 32 as shown in FIG. There is. This notch 32 is formed at the upper end of the film 28,
It is located within the photographable range to the left of the 20th frame in the figure. That is, it is located within the photographing range of the so-called 21st frame.

The film feeding device 30 is again provided with a winding motor 34, as shown in FIG. 2, and a detection plate 38 and a worm gear 40 are provided coaxially with a drive shaft 36 of the winding motor 34, respectively. There is. A worm wheel 42 having an axis perpendicular to the drive shaft 36 meshes with the worm gear 40 . This worm wheel 42
is provided with a pawl 44 that engages with one end of the film winding shaft and rotates it.

One detection hole 46, which is a through hole penetrating in the thickness direction, is provided at a predetermined position on the peripheral edge of the detection disk 38. A light emitting element 48 and a light receiving element 50 are provided facing each other on a circumference coaxial with the detection hole 46 with the detection disk 38 in between. The light receiving element 50 is formed so as to generate a pulse signal in response to light from the light emitting element 48 when the light is incident through the detection hole 46 located between them. Here, the number of teeth of the worm gear 40 and the worm wheel 42 is such that the winding shaft winds up one frame of the film 28 by one rotation of the detection disc 38, that is, one rotation of the drive shaft 36. is set.

The light receiving element 50 is connected to a reset terminal R of a flip-flop circuit 54 via an amplifier 52. On the other hand, a release switch 5 is closed in response to a pressing operation of a release button (not shown).
6 is connected to the shutter control circuit 58. The shutter control circuit 58 is configured to operate a shutter (not shown) in response to the closing of the release switch 56, and output a motor drive signal after the shutter operation is completed. This shutter control circuit 58 is connected to the set terminal S of the flip-flop circuit 54 through one input terminal of an OR circuit 60.

The film feeding device 30 transports the film 2
Notch detection switch (notch detection switch) for removing the notch formed by the notch 32 formed in 8
62. The notch detection switch 62 has two positions: a first position in which it contacts the upper end of the film 28 and closes the switch 62 when the film cassette 10 is installed in the endoscope camera 12; Fallen switch 62
It is movably provided between the second position and the second position where the opening is opened. This notch detection switch 62
It is disposed at a point that is a predetermined distance B away from the left end of the aperture 64 of a mask (not shown) that defines the imaging range shown by the dashed line in the figure to the left in the figure. This predetermined distance B is such that the film 28 is 20
When the frame is in the photographable position, the distance from the left end of the aperture 64 in the drawing to the notch 32 is set smaller than the distance to the right end of the adjacent photographable range in the drawing. The notch detection switch 62 is configured to output a notch detection signal when it is opened, that is, when it moves from the first position to the second position. This notch detection switch 62 is connected to a blank feed signal generation circuit 66. This blank feed signal generating circuit film 66 is configured to output a blank feed signal instructing blank feed for two frames in response to input of a notch detection signal from the notch detection switch 62. This idle feed signal generation circuit 66 is connected to the above-mentioned OR
Via the other input terminal of the circuit 60, it is connected to the set terminal S of the flip-flop circuit 54.

This flip-flop circuit 54 outputs a start signal from an output terminal Q in response to an input to a set terminal S.
It is configured to output a stop signal in response to the input to the reset terminal R, respectively. The output terminal of the flip-flop circuit 54 is connected to the hoisting motor 34 via an amplifier 68.

The operation of the endoscope imaging device configured as above will be explained.

When the release switch 56 is closed in response to the pressing operation of the release button, the shutter control circuit 58 drives the shutter to take a picture.
After this photographing is completed, a motor drive signal is output. This motor drive signal passes through the OR circuit 60 and reaches the set terminal S of the flip-flop circuit 54, and in response to the input of this motor drive signal, a start signal is outputted from the output terminal Q of the flip-flop circuit 54 to the motor 34. As a result, the motor 34 starts rotating. This rotation causes the film winding shaft to rotate via a series of worm gears 40 and worm wheels 42, and begins to wind the film 28.

On the other hand, as the motor 34 rotates, the detection disk 38 also rotates, and the detection hole 46 formed in the detection disk 38 rotates. And again this detection hole 46
is located between the light emitting element 48 and the light receiving element 50,
When the light from the light emitting element 48 reaches the light receiving element 50,
The light receiving element 50 outputs a signal to the reset terminal R of the flip-flop circuit 54 via the amplifier 52 in response to the light reception. Flip-flop circuit 5
A stop signal for stopping the rotation of the motor 34 is output from the output end R of the light receiving element 50 in response to the signal input from the light receiving element 50, and the rotation of the motor 34 is stopped.

As a result, the winding operation for one frame of the film 28 is completed, and the camera enters a shooting standby state.

This photographing operation is repeated until the number of photographed frames reaches 20, and when the photographing operation for the 20th frame is completed, the film 28 is wound again. At this time, the notch 32 of the film 28 reaches the notch detection switch 62 which is in contact with the upper end of the film 28, and the notch detection switch 62 falls into this notch 32 and opens. In response to this opening operation, the notch detection switch 62 is activated by the idle feed signal generation circuit 66.
A notch detection signal is generated. The idle feed signal generating circuit 66 outputs an idle feed signal for two frames to the set end S of the flip-flop circuit 54 via the OR circuit 60 in response to the input of the notch detection signal.
The flip-flop circuit 60 outputs a start signal from the output terminal Q in response to the input of the above-mentioned blank feed signal, drives the winding motor 34, and starts the film 2.
Wind up 2 pieces of 8. That is, the film 28 is 20
After the photographing operation for the frame is completed, it is advanced by at least two frames and then stopped. Therefore, to the left of the photographing range of the 20th frame, a blank feed section for at least one frame is formed, and this blank feed section has a notch 32.

In this way, the 21st frame of the film 28 is set to have at least one frame's worth of idle feeding between it and the 20th frame, and from the 21st frame onward, the same photographing operation as described above is performed.

Therefore, when developing the film 28, which has twice the length of the conventional film for 20 frames,
Since the film 28 can be cut in a dark room by manually checking the position of the notch 32 and cutting the film 28 using this as a reference, the cutting operation is simplified. By cutting the film 28 at this notch 32, the film 28 is divided into two films of the same length as a conventional 20-frame film, and each film is divided into two films of the same length as a conventional 20-frame film. It becomes possible to apply it to Furthermore, since the film 28 is provided with a blank feed section at the location where the notch 32 is set, the film can be cut without damaging the photographing range. Further, since the cut portion is a blank feeding portion, this portion can be used as a nip in the developing system, and the film can be developed without spoiling the photographed images on both sides of the cut portion.

In the above embodiment, the film 28 is twice as long as the conventional 20-frame film. However, the length is not limited to this, and the length may be three times as long, for example. In this case, the same effect can be obtained by further forming a notch-like cutout at the upper end of the film at a point having twice the length.

Further, in the above embodiment, the film 28 is moved by two frames after the notch 32 is detected. However, without being limited to this, for example,
It may also be configured such that after the winding operation in which the notch 32 is detected is completed, the frame is skipped forward by one frame. With this configuration, it is possible to reliably form a blank feed portion for one frame.

As described in detail above, the endoscopic photographing device according to the present invention uses a plurality of frames as one block, and inserts a notch into the film at a position corresponding to each block, and detects the notch to detect the empty space in the film. It is characterized by consisting of an endoscopic camera that transmits images. Therefore, it is desirable to provide an endoscope photographing device that can reliably cut the film block by block in a dark room using this notch as a mark without accidentally cutting the photographed portion. can.

[Brief explanation of the drawing]

Fig. 1 is a side view showing the camera of the endoscopic imaging device according to the present invention attached to the endoscope, and Fig. 2 is a schematic view of the film feeding device incorporated in the endoscopic camera taken out. and FIG. 3 are diagrams for explaining the positional relationship between the notch formed in the film of the endoscope photographing device and the notch detection switch. 12...Endoscope camera, 28...Film,
32... Notsuchi.

Claims (1)

[Claims] 1 A long photosensitive film is formed with a notch for position confirmation, and when cut using this as a reference, the cut portion has blocks each having a predetermined number of frames, and this long photosensitive film is cut longitudinally. This endoscopic photographing device has an automatic film feeding device that sequentially feeds the film to a shooting position along a direction to enable the shooting of multiple frames, and the film feeding device detects the notch, and the film feeding device detects the notch. A photographing device for an endoscope, characterized in that the film of the formed part is skipped at least one frame from the photographing position, and the first frame of the next block is brought to the photographing position, thereby making it possible to photograph this part. .