JPH02159245A - Endoscope - Google Patents

Abstract

PURPOSE:To easily assemble the connection part of a forceps channel and a forceps insert port part by fixing a valve seat to an exterior cover from the outside of the exterior cover of an operation part and positioning the forceps channel to connect the same in a state connected to a forceps insert passage so as to communicate therewith. CONSTITUTION:Forceps insert passages 31, 32 are provided to a valve seat 25 by drilling so as to pierce the same and forceps insert caps 29, 30 are threaded with the valve seat 25 from above to communicate with respective forceps channels 11, 12 through the forceps insert passages 31, 32. The step part of connection caps 35, 36 is engaged with the step part 21b formed to the bottom part of the protruding part 21a of an exterior cover 21 to fix the valve seat 25 to the exterior cover 21 and the connection caps 35, 36 are held between the valve seat 25 and the step part 21b of the exterior cover 21 to be positioned and fixed. That is, the valve seat 25 is fixed to the exterior cover 21 and the forceps channels 11, 12 are positioned and fixed in a state connected to the forceps insert ports 9, 10 through the forceps insert passages 31, 32 of the valve seat 25.

Description

DETAILED DESCRIPTION OF THE INVENTION [Field of Industrial Application] The present invention relates to an endoscope in which a forceps channel also serves as a suction path.

[Prior Art] Endoscopes generally use a forceps channel that also serves as a suction path. Therefore, a forceps insertion mouthpiece into which a treatment tool such as forceps is inserted and a suction tube connected to a suction means are connected to the forceps channel, and this connection is made in the vicinity of the forceps insertion port within the operating section.

However, when this connection assembly is performed, the forceps channel is already assembled into the insertion tube, and the end of the forceps channel is only protruding from the end of the insertion tube. ing. Therefore, it is not easy to accurately connect the forceps channel to the forceps insertion mouthpiece in a narrow space within the operating section.

Therefore, conventionally, as shown in Japanese Patent Publication No. 63-29539, for example, a connecting member in which a forceps insertion passage is formed is fixed inside the operating section, and a forceps insertion port body is fitted into the connecting member from the outside. At the same time, a forceps channel was connected to the other end of the forceps insertion passage.

In addition, in an endoscope having a plurality of forceps channels, a switching mechanism for selecting a forceps channel for suctioning is further connected near the connecting portion between the forceps insertion cap and the suction tube.

[Problem to be solved by the invention]

However, even with the device disclosed in Japanese Patent Publication No. 63-29539, the assembly work was not easy because the forceps channel had to be connected to the connecting member within the narrow operation section.

Furthermore, in devices with multiple forceps channels, the multiple forceps insertion sections and the switching operation mechanism are separated from each other, making assembly difficult because it is difficult to position and fix each component of the device. This is not easy, and there are additional drawbacks such as the length of the operating section being increased and the operability of the operating section as a whole being reduced.

An object of the present invention is to eliminate such conventional drawbacks and to provide an endoscope in which the connecting portion between the channel and the forceps insertion port can be easily assembled.

[Means for Solving the Problems] In order to solve the above-mentioned problems, the endoscope of the present invention is an endoscope in which a forceps channel is used also as a suction path, in which a forceps insertion passage is formed. A forceps insertion cap is attached to the pedestal so as to communicate with the forceps insertion passage, and the pedestal is fixed to the exterior cover of the operation unit from the outside by a fixing means. By fixing the pedestal to the exterior cover in this way, the forceps channel is positioned and fixed in a state where it is communicated and connected to the forceps insertion passage.

[Operation] By fixing the pedestal in which the forceps insertion passage is formed to the exterior cover from the outside of the exterior cover, the forceps channel is simultaneously positioned and fixed in a state where it communicates with the forceps insertion opening through the forceps insertion passage.

[Example] Examples will be described with reference to the drawings.

FIG. 1 shows an operating section 1 according to a first embodiment of the present invention, and a known suction operation valve 3 and an air/water supply operation valve 4 are installed at the upper front part of the grip section 2 of the operation section 1. are lined up and dispensed, and a bending operation knob 5 is disposed on the right side. 6 is an eyepiece, and 7 is a suction connection tube connected to a suction device (not shown).

Reference numeral 8 denotes a flexible insertion section, and in the connecting section 20 between the insertion section 8 and the operating section 1, two forceps insertion ports 9 and 10 for inserting treatment instruments such as forceps are arranged closely side by side. , slightly tilted forward and protruding. The forceps channels 11.12 inserted into the insertion portion 8 are connected to the forceps insertion ports 9.10, respectively.

Reference numeral 13 denotes a suction line switching mechanism that selectively connects one or both of the two forceps channels 11 and 12 to the suction device via the suction connection pipe 7 or the like, and includes a forceps insertion port 9.
, 10 are integrally provided directly below the parts. An operating knob 14 for switching the suction line switching mechanism 13 is rotatably protruded from the front surface thereof.

2 to 4 show the structure around the suction line switching mechanism 13. Reference numeral 15 denotes a frame of the operating section 1, and the connecting section 20 is covered with a first exterior cover 21 at the upper half and a second exterior cover 22 at the lower half. The joint portions of these two exterior covers 21 and 22 are watertightly connected by a joint pipe 24 equipped with a sealing O-ring 23.

A pedestal 25 is fixed within the forward-inclined protrusion 21a of the first exterior cover 21, which serves as a base for both the suction channel switching mechanism 13 and the forceps insertion port 9.10. This pedestal 25 is
A switching valve 37, which will be described later, and other suction line switching mechanisms 13 are positioned and fixed to the exterior cover 21 by inserting them from the outside (from the diagonally lower right side in FIG. 2).

Basically, the suction pipe switching mechanism 13 serves as a fixing means for fixing the pedestal 25 to the exterior cover 21 from the outside.

26 is an O-ring for sealing, and 27 is a cover member.

Forceps insertion passages 31 and 32 are bored through the base 25. The forceps insertion mouthpieces 29.30 are screwed onto the base 25 from above so as to communicate with the forceps insertion passages 3132, and each forceps insertion mouthpiece 29.30 is connected to each It communicates with forceps channels 11 and 12. Ila, 12a is a metal connecting tube connected to the end of the forceps channel 11.12, and a connecting mouthpiece 35.36 fitted with an O-ring 33.34.
The forceps insertion passages 31 and 32 are connected to the ends of the forceps insertion passages 31 and 32 in a watertight manner.

The connection caps 35 and 36 have stepped portions that engage with step portions 21b formed at the bottom of the exterior cover protrusion 21a, and by fixing the pedestal 25 to the exterior cover 21, the connection caps 35 and 36. 36 is the pedestal 25 and the stepped part 2 of the exterior cover
1b and is positioned and fixed. That is, by fixing the pedestal 25 to the exterior cover 21, the forceps channels 11, 12 pass through the forceps insertion passages 31, 32 of the pedestal 25, and the forceps insertion opening 9. It is positioned and fixed in a state where it is connected to IO.

Note that since the cross sections of different parts are shown in a composite manner in FIG. 2, it appears that the forceps insertion passages 31 and 32 are blocked, but the forceps insertion passages 31 and 32 are not shown in FIG. It penetrates through the pedestal 25 so that it can be seen.

A switching valve 37 directly connected to the operating knob 14 is rotatably fitted in the center of the pedestal 25. Operation knob 1
4 and the switching valve 37 have a non-circular cross-sectional shape,
They are integrally connected by fixing screws 47. 38 is an O-ring for sealing. A communication passage 39 formed at the bottom of the switching valve 37 communicates with the suction operation valve 3.

40 is a suction tube connected to the suction operation valve 3; 41
is a metal connecting tube, which is connected to the base 25 via connection caps 42 and 43. 44 is an O-ring for sealing.

As shown in FIG. 4, the pedestal 25 has a communication passage 45 that communicates the bottom of the switching valve 37 with both forceps insertion passages 31 and 32.
．． 46 is formed, and by rotating the switching valve 37, the communication state between the suction tube 40 and the forceps insertion passage 31, 32 (i.e., the communication state between the suction operation valve 3 and the forceps channel 1) is established.
1.12 can be changed.

In this embodiment, the switching valve 37 has two symmetrical cutouts in a fan shape, and in the state shown in FIG. . Then, by rotating the switching valve 37, only one of the forceps channels can be communicated with the suction operation valve 3.

51 and 52 are fixed members fixed to the pedestal 25.

The first fixing member 51 is fixed to the base 25 by a fixing screw 48 (not shown in FIG. 2), and the second fixing member 5
2 is fixed to the first fixing member 51 by a nut 53. A plurality of sealing O-rings are also attached to this part. The switching valve 37 is equipped with a click spring 54 fixed with a screw 49 and a click pole 55 biased by the click spring 54 to the end of the fixing member 51, which is optimal for switching the suction line. In position, switching valve 3
7 can be stopped. 56 is the fixing member 5
2 from the outside to prevent the switching valve 37 from being removed.

The endoscope of the above embodiment is configured in this manner.

By rotating the operating knob 14, the switching valve 37 is
rotates, and one or both of the two forceps channels 1.1.12 can be selectively communicated with the suction operation valve 3. Then, when the suction operation valve 3 is operated, suction is performed through the forceps channel communicating with the suction operation valve 3.

The endoscope of this embodiment has two forceps channels 1 by fixing one pedestal 25 to the exterior cover 21.
Since the components 1.12 are positioned and fixed, the component members are positioned and fixed by successive component members, making assembly of the device very easy. In addition, the suction pipe switching mechanism 1
3 and the forceps insertion caps 9 and 10 are integrally attached to one pedestal 25 and fixed to the operating section, the device can be formed compactly, and as a result, the operating section is downsized and can be easily handled. It can be done.

5 to 7 show a second embodiment of the invention, in which the suction tube 40 is connected to one connection mouth 135 so that suction is applied only through one forceps channel 11.
It is connected via a connecting pipe 41 to the connecting pipe 41. Therefore, a suction pipe switching mechanism is not provided, and instead, the fixing screw 113 is inserted from the outside of the exterior cover 121 into the pedestal 125.
The pedestal 125 is fixed in the operating section by screwing onto the pedestal 125.

138 is an O-ring for sealing. By fixing the pedestal 125 to the exterior cover 121 in this way,
This embodiment is the same as the first embodiment in that the connection caps 135 and 36 are sandwiched between the pedestal 125 and the stepped portion 121b of the exterior cover, and are positioned and fixed. That is, by fixing the pedestal 125 to the exterior cover 121, the forceps channel 1
1.12 is positioned and fixed through the forceps insertion passage 31.32 of the 1 pedestal 125 so as to be connected to the forceps insertion port 9.10. Since the other parts are the same as those in the first embodiment, the same reference numerals are given to the main parts and the explanation thereof will be omitted.

8 to 10 show a third embodiment of the present invention, in which the forceps channel of the second embodiment described above is reduced to one. In this embodiment, the suction tube 40 is connected to the connection mouthpiece 235 via a connection pipe 41. Then, the fixing screw 213 is attached to the exterior cover 221.
is screwed onto the pedestal 225 from the outside to fix the pedestal 225 within the operating section. 238 is an O-ring for sealing. In this way, the pedestal 225 is attached to the exterior cover 2.
By fixing it to the base 21, the connection base 235 is attached to the base 2.
25 and the stepped portion 221b of the exterior cover, and is positioned and fixed. In other words, the pedestal 225 is
1, the forceps channel 11 is positioned and fixed in a state where it is connected to the forceps insertion port 9 through the forceps insertion passage 31 of the base 225. The other parts are the same as those in the first and second embodiments, so the same reference numerals are given to the main parts and the explanation thereof will be omitted.

[Effects of the Invention] According to the endoscope of the present invention, by fixing the pedestal in which the forceps insertion passage is formed to the exterior cover, the forceps channel is simultaneously positioned in a state where it communicates with the forceps insertion port. fixed, each component is assembled at the same time,
Furthermore, since the fixing can be performed from the outside of the outer cover, the forceps channel and the forceps insertion opening can be easily and accurately connected, and the assembly work can be greatly facilitated.

Further, if the present invention is applied to an endoscope having a plurality of forceps channels, the device can be made compact and the operation section can be made small, so that effects such as improved operability can be obtained.

[Brief explanation of the drawing]

FIG. 1 is a perspective view of the entire operating section of an endoscope according to a first embodiment of the present invention. FIG. 2 is a longitudinal cross-sectional view of the pipe connection portion of the embodiment. Fig. 3 is a partial external view taken from the arrow ①, Fig. 4 is a sectional view taken along the line ff-IV, Fig. 5 is a longitudinal sectional view of the second embodiment of the present invention, and Fig. 6 is a partial external view taken from the FIG. 7 is a cross-sectional view taken along the line ■--■, FIG. 8 is a vertical cross-sectional view of the third embodiment of the present invention, and FIG. 9 is a partial external view taken in the direction (■) of the present invention. . FIG. 10 is a cross-sectional view taken along the line X--X. 1...Operation unit, 11.12 forceps channel, 13...
- Suction pipe switching mechanism (fixing means), 21... Exterior cover, 21b... Step part, 25... Pedestal, 29.30.
...forceps insertion cap, 35...Mi connection cap, 40...
Suction tube, 1... Connection tube, 3... Fixing screw, 1... Exterior cover b... Step part, 5... Pedestal, 5... Connection cap.

Claims (1)

[Claims] In an endoscope in which a forceps channel is used also as a suction path, a pedestal having a forceps insertion passage formed therein is disposed within the operating section so as to communicate with the forceps insertion passage. Attaching the forceps insertion cap to the pedestal, and fixing the pedestal to the exterior cover of the operating section from the outside by a fixing means, and fixing the pedestal to the exterior cover in this way allows the forceps channel to be attached to the forceps. An endoscope characterized in that it is positioned and fixed in a state where it is communicated and connected to an insertion passage.