JPS5846928A - Endoscope - Google Patents

Abstract

(57) [Summary] This bulletin contains application data before electronic filing, so abstract data is not recorded.

Description

DETAILED DESCRIPTION OF THE INVENTION The present invention relates to an improvement in a distal end camera type endoscope in which a photographing mechanism is housed in a distal end component of an insertion section.

In general, this camphor endoscope has a photographing mechanism housed in the distal end component of the insertion section, and a winding drum in the operation section. The winding drum is driven to rotate, and the film is wound one frame at a time. Incidentally, a frame number display board that rotates in conjunction with the winding drum is provided in the operation section, and a display window is also provided in the operation section, so that the user can view the frame number display on the frame number display board by looking through the display window. By looking at it, there was one that allowed you to check the number of remaining nine sheets of film. However, when a user continuously takes photographs, he or she must take his or her eyes off the endoscope's eyepiece and look through the display window in order to check the number of remaining sheets of film, which is troublesome. Besides, there was a risk of missing out on a chance.

Therefore, conventionally, the characters on the frame number display board are guided into the field of view of the eyepiece using an optical fiber bundle, and the remaining film is inserted into the body cavity within the field of view of the eyepiece without taking the eye off the eyepiece. There was a problem in that the area for observing the observed part was narrow, making it difficult to see the observed image. Furthermore, since it was necessary to provide a special optical fiber bundle for guiding the characters on the frame number display board to the field of view of the eyepiece, there were disadvantages in that the cost was high and the structure was complicated. There are also devices that have a liquid crystal display section provided within the field of view of the eyepiece, but this also has the disadvantage that the field of view of the observed image by the eyepiece is pinched, making it difficult to see the observed image.

This invention was made in view of the above-mentioned circumstances, and its purpose is to make it easy to check the number of sheets of film, and to avoid narrowing the field of view of the eyepiece and making it difficult to see the observed image. Another object of the present invention is to provide an endoscope whose structure can be simplified and costs can be reduced.

Hereinafter, the present invention will be explained based on embodiments shown in the drawings. 1 to 6 show a first embodiment of the present invention. FIG. 1 shows a schematic configuration of the entire endoscope, where 1 is an insertion section and 2 is an operation section. An eyepiece lens 3 and a light guide cable 4 are connected to the operation N2. Further, the push-in part 1 is formed from a tip forming part 5, a curved part C, and a tubular part 1. The distal end component 5 has a main body 10 in which an illumination window 8 and an observation/photographing window 9 are embedded in the circumferential surface and a recess is formed in the distal end. , 7'JJ. A film cartridge and a film cartridge 13 are loaded into the storage chamber 11. The tip portions of a light guide fiber 14 and an Inno-2 guide fiber 15, which are optical fiber bundles, are embedded in the main body 10. The distal end surface of the light guide fiber 14 is arranged to face the illumination window 8. Also, what is the tip surface of Image Guide 7 Aino 415? It is arranged opposite to the iM detection lens 16. This observation lens 16
A light guide member 11 formed by the gaOf rhythm is disposed in front of the . This light guide member 11 directs the light incident from the observation and photography window 9 to an observation lens 16 and a photography lens 18, which will be described later. It is something that guides. Also,
A photographing mechanism 19 is provided below the observation photographing window 9. This photographing mechanism 19 is the photographing lens 18,
Exposure chamber 20, shutter 21 and film guide path 22
It is formed from. The photographic lens is disposed opposite to the observation and photographing window 9 via the light guide member 11 . The exposure chamber 20 is formed below the photographic lens 18, and the bottom of the exposure chamber 20 communicates with a part of the film guide path 22. Further, the shutter 21 is disposed between the photographing lens 18 and the film guide path 22, and is slidable from a closed position where it blocks the exposure chamber 10 to an open position where it opens the exposure chamber 20. One end of a drive wire 23 is fixed to this shutter 21 . Further, 24 is a winding wire, and seven hooks 25 are fixed to the tip of this winding wire 24. A portion of the leader of the film 26 is detachably connected to the hook 25.

On the other hand, the image guide 7 eye pars, the drive wire 2
3 and the winding wire 24 are connected to the bending section 6 and the flexible tube section 7.
and is guided into the operating section 2. Further, the light guide fiber 14 is inserted into the bending section 6 and the flexible tube section 1, guided into the operating section 2, and further inserted into the light guide cable 4 to connect the connector attached to the light guide cable 4. It is connected to an external light source device 27 via. The proximal end surface of the image guide fiber 15 is arranged to face the eyepiece lens 3. Further, the base end portion of the winding wire 24 is fixed to a winding drum 28.

This winding drum 28 is rotatably mounted on a suitable mounting frame within the operating section 2. In addition, the operation section 2
A /4-j19 is provided for operation. This operating lever 29 is used to wind up the film 260 and to operate the shutter 21.
A series of operations related to photographing, such as opening and closing, are performed, and this operation drum 28 is driven.

Further, a gear 30 is fixed to the winding drum 28. A frame number display plate 31 is meshed with this gear 30, and the frame number display plate 31 is interlocked with the rotation of the winding drum 28.
is set to rotate. This ° frame number display board 31
As shown in FIG. 4, a scale 32 indicating the number of remaining films 26 is written on the surface of the film 26 along the rotation direction as shown in FIG. For example, a plurality of through holes 3S are bored corresponding to 20°15.10.5 of the scale 32, respectively. The operation unit 2 is also provided with a viewing window 34 for display.
The scale 32 is readable. Further, above and below the frame number display board 31, a reflective aS as a light emitting means is provided.
S and a light receiver 36 as a light receiving means are connected to the frame number display board 3.
They are placed facing each other with 1 in between. The reflecting mirror 35 is attached to the inner wall of the operating section 2. Further, a part of the light guide fiber 14 is branched within the operating section 2,
The distal end surface of this branched light guide fiber 14a is arranged to face the reflecting mirror 35. Then, as shown in FIG. 5, the light emitted from the branched guide fiber 14 is reflected toward the frame number display plate 31 by a reflecting mirror 35. In this case, the frame number display plate 3 rotates and the reflector 3
5 and the light receiver 36, the light reflected by the reflecting mirror 35 will pass through the through hole 3.
The reflected light is detected by the light receiver S6, and the reflected light is detected by the light receiver S6.
A photodetection mechanism 31 is formed from the above. Further, the light receiver 36 converts the light into an electrical signal and outputs it, and is connected to the control section 38. This control section 38 includes an amplification circuit 39, a control circuit 40, and a memory circuit 41. Then, the signal is sent from the light receiver 36 and is amplified by the Denki Signal Company amplification circuit 39 and passed through the control circuit 40 to the memory circuit 41.
sent to.

The memory circuit 41 stores the number of times the electric signal is sent, and outputs a signal corresponding to the number of frames on the film 26 based on this number of times. and,
The frame number display board 31, a plurality of through holes 33 formed on the frame number display board 31..., a detection mechanism that detects the rotational position of the drum 28 for winding using the light detection mechanism 31 and the control unit 38. is configured. Further, an oscillator 42 is connected to the memory circuit J1. This oscillator 42 oscillates a display sound corresponding to the number of frames of the film 26 based on the output signal from the control section i8. The control unit 38 is connected to a lead wire provided in the two-item guide cable 4, and is connected to a power source provided in the light source device @2r via this lead wire.

Next, photographing with the endoscope having the above configuration will be explained. First, the insertion section 1 is inserted into a body cavity or the like, and an observation image guided through the observation photographing window 9, the light guide member 17, and the image guide fiber 15 is observed by looking through the eyepiece lens 3. Then, after aligning the field of view of the eyepiece 3 with the object to be photographed, operate /? -, 29 to open and close the shutter 21. In this case, when the shutter 21 moves to the open position l, the light entering through the observation and photographing window 9 passes through the light guide member 17, the photographing lens 18 and the exposure chamber 20, and onto the film 26 exposed to the exposure chamber 2o. irradiated with
An observation image is formed on the film 2ρ. And Sha.

When the shutter 21 moves to the closed position, one frame of photographing ends. Next, when the operating lever 29 is operated to rotationally drive the winding drum 28, the winding wire 24 is wound onto the winding drum 28, and the film 26 is pulled by the winding wire 24 from the film cart retrieval) 13 for each frame. Next, it is pulled out and set so that the unexposed film 26 faces the exposure chamber 20. In addition, since the frame number display plate 31 also rotates in conjunction with the rotation of the winding drum 28, the scale 3 indicating the number of frames on the film 26 (D!! 4F)
2 is displayed on the instruction viewing window 34. In this case, the light guided through the branch light guide fiber 141 is reflected by the reflecting mirror 35 and radiated to the frame number table board 3, so that
The scale 32 on the frame number display board 31 can be clearly illuminated. As photography progresses and the number of frames remaining on the film 26 reaches 20.15 or 10.5, the light reflected by the reflector 35 is reflected by the through hole 33 of the frame number display plate 31, as shown in FIG. derived through. Then, when the light reflected from the reflecting mirror 35 is detected by the light receiver 36, based on the output signal from the light receiver 36, the □film 2
The oscillator 42 oscillates a display sound corresponding to the number of frames of 6.

In this way, with the above configuration, the number of remaining sheets of the film 26 is displayed in digits, so the number of remaining nine sheets of the film 26 can be confirmed without taking your eyes off the eyepiece 3 when taking a photograph. Therefore, film 260!
l) It is easy to check the number of images, there is no risk of missing a photo opportunity, and since nothing other than the observed image is shown within the field of view of the eyepiece 3, there is no problem of narrowing the field of view of the observed image. The observation image can be made easier to see. Further, since the light is sent to the reflection f1135 from the branched light guide 14a which is a branched part of the light guide fiber 14, there is no need to provide a special optical fiber bundle. Therefore, the configuration is simple and inexpensive.

Next, a second embodiment shown in FIGS. 7 and 8 will be described. This is because, instead of the plurality of through holes 3S... drilled in the frame number display board 31 in the first embodiment, a plurality of reflective plates 52, .
... are appropriately arranged, and a reflecting mirror (light emitting means) 53
and a light detection mechanism 55 consisting of a light receiver (light receiving means) 54
are arranged to face the surface of the frame number display board 51 on which the respective reflecting plates 52 are placed. Even with such a configuration, the same effect as in the first embodiment can be obtained, and in this case, there is no need to provide a through hole in the frame number display board 51, so that the frame number display board 61 It becomes easy to manufacture.

FIG. 9 and FIG. 1O show a third embodiment. This is provided with a plurality of protrusions 62 projecting in the centrifugal direction on the surface of the frame number display board 61, and a reflector (light emitting means) 63 and a light receiver ( (light receiving means) 64 are arranged facing each other, and a light detection mechanism 66 consisting of a reflecting mirror 63 and a light receiver 64 detects that light is blocked by each protrusion 62 of the frame number display board 61. It is. In this case, when the light is blocked by each protrusion 62 of the frame a display board 61, a signal is output from the control section 38 to the oscillator 42. Even with such a configuration, the same effects as in the first embodiment can be obtained.

Further, FIG. 11 shows a fourth embodiment. This is the reflecting mirror 35 in the embodiments #11 to @3.
．． A rung 71 is provided in place of 53 and 63, and the branch light guide fiber J4m is omitted. Even with such a configuration, the same effects as in the first embodiment can be obtained.

It should be noted that Jin's invention is not limited to the first to fourth embodiments. For example, the oscillator 42 does not necessarily need to be provided within the operating section 2, and may be provided within the light source device 27. Further, the detection mechanism is not limited to one having a photodetection mechanism, and may be one that electrically detects the rotational position of the drum 280. It goes without saying that various other modifications can be made without departing from the spirit of the invention.

As explained above, according to the present invention, a detection mechanism detects the rotational position of the winding drum that sequentially winds the film frame by frame, and the detection mechanism corresponds to the number of frames of the film based on the output signal from the detection mechanism. Since the display sound is oscillated from an oscillator and the number of film frames is displayed by sound, it is possible to check the number of film frames without taking your eyes off the eyepiece, making it easy to check the number of film frames. This makes it possible to make the observation image easier to see, and also to simplify the configuration and reduce costs.

[Brief explanation of the drawing]

Figures 1 to 6 show this invention. Fig. 1 is a front view schematically showing the overall configuration, and Fig. 2 shows a first embodiment of the invention.
3 is a longitudinal sectional view showing the tip component, FIG. 3 is a longitudinal sectional view showing the operating section, FIG. 4 is a plan view showing the frame number display board, FIG. 5 is a schematic configuration diagram showing the main parts, and FIG. 6 is a configuration diagram showing the control section,
Figures 7 and 8 show the second embodiment.
The figure is a schematic diagram of the main part, Figure 8 is a plan view showing the frame number display board, Figures 9 and 10 show the third embodiment, and Figure 9 is a schematic diagram of the main part. , FIG. 10 is a plan view showing the frame number display board, and FIG. 11 is a schematic configuration diagram showing the main part of the fourth embodiment. DESCRIPTION OF SYMBOLS 1... Insertion part, 2... Operation part, 19... Photography mechanism, Z a-... Drum for winding, 42-... Oscillator. Figure M Figure 2 Figure 3 Figure 4B 61 Figure 7 Figure ■

Claims (4)

[Claims] (1) In an endoscope that houses a photographing mechanism in the insertion section and a winding drum in the operating section, and sequentially winds the film frame by frame by driving the winding drum, detects the rotational position of the winding drum. A detection mechanism is provided, and an oscillator that oscillates a display sound corresponding to the number of frames of the film based on an output signal from the detection mechanism, and the number of frames of the film is displayed by sound. Endoscope/ (2) The detection mechanism includes a frame number display plate that rotates in conjunction with the winding drum, a plurality of through holes appropriately drilled in the frame number display plate along the rotation direction, and a frame number display plate that is sandwiched between the frame number display plate and the frame number display plate. a photodetection mechanism that detects the light passing through the through hole, which is arranged opposite to each other and consists of a light-emitting means and a light-receiving means; and a signal corresponding to the number of frames of the film is output based on the detection data from this photodetection mechanism. An endoscope according to claim (1), characterized in that the endoscope comprises a control section that controls the operation of the control section. (3) The detection mechanism includes a plurality of reflecting plates arranged as appropriate along the rotation direction on the frame number display board, and a light detection mechanism consisting of a light emitting means and a photoreceptor, which is connected to each of the reflection plates on the frame number display board. The endoscope according to claim (2), wherein the endoscope is arranged to face the surface on which the plate is arranged. (4) The detection mechanism includes a plurality of protrusions protruding in the centrifugal direction on the surface of the frame number display board, and a light detection mechanism consisting of a light emitting means and a light receiving means, which are arranged opposite to each other with the frame number display board in between. Claim No.
The endoscope described in section 2).