JPH0739512A - Endoscope - Google Patents

Abstract

PURPOSE:To provide an endoscope equipped with a suction control device with good cleanability. CONSTITUTION:In the endoscope equipped with a cylinder with a pair of connection opening connected to an upstream tube part 30 and a downstream tube part 28 of suction tube passage respectively, and a piston forming passage to communicate a pair of connecting opening mutually, and a suction control device 6 to control the suction work of suction passage 28 and 30 by controlling the state of communication between a pair of suction opening each other inserting the piston in the cylinder, a suction control device 6 is detachably attached on a endoscope operation part 2.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having a suction control device.

[0002]

2. Description of the Related Art Conventionally, there has been known a suction control device which is inserted in the middle of a suction pipe line of an endoscope and controls a suction operation in the suction pipe line (Japanese Patent Application No. 58-13203).

As shown in FIG. 71, the suction control device 6
00 controls the suction operation by a switching valve having a cylinder 603 and a cylindrical piston 602 fitted and inserted in the cylinder 603.

The cylinder 603 is provided with a pair of connection ports 610 and 612 to which the upstream suction pipe line 631 and the downstream suction pipe line 630 are respectively connected. In addition, the piston 602 passes through a passage formed by a cylindrical inner hole 615 and a through hole 616 provided in a side wall of the piston 602 so as to communicate with the inner hole 615,
The pair of connection ports 610 and 612, that is, the upstream suction pipe line 631 and the downstream suction pipe line 630 can be communicated with each other.

That is, in the normal standby state, the switching valve shuts off the suction pipe line, and the downstream side suction pipe line 630 communicating with the inner hole 615 of the piston 602 is provided with a leak hole provided above the piston 602. In the suction operation state in which the piston 602 is pushed in, the through hole 616 is located at the upstream connection port 610 portion of the pair of connection ports 610, 612, and thereby, The downstream suction pipe line 630 communicating with the inner hole 615 of the piston 602 is communicated with the upstream suction pipe line 631 through the through hole 616 to open the suction pipe line.

[0006]

Although the suction control device 600 has a structure in which the piston 602 can be removed from the cylinder 603, the cylinder 603 does not have the structure described above.
And a downstream suction pipe 630 that connects the cylinder 603 and a forceps insertion channel (not shown), and an upstream suction pipe 631 that connects the cylinder 603 and a suction tube (not shown).
Is fixed to the operation unit 601 and cannot be removed.

Therefore, when cleaning the cylinder 603, the inside of the cylinder 603 is cleaned with a dedicated cleaning brush with the piston 602 removed from the cylinder 603. However, when the cylinder 603 is embedded inside the operating portion 601, Since it is fixed, the cleaning work was troublesome.

Further, the cylinder 603 and the downstream suction pipe line 6
30, a connection portion with the cylinder 603, and an upstream suction pipeline 63
Even when cleaning the connection part with 1, the operation part 60
Since it is located inside No. 1, cleaning is performed using a dedicated brush, and cleaning work is very difficult.

The present invention has been made in view of the above circumstances, and an object of the present invention is to provide an endoscope having a suction control device having a good cleaning property.

[0010]

In order to solve the above-mentioned problems, the present invention provides a cylinder having a pair of connection ports to which the upstream pipe portion and the downstream pipe portion of the suction pipe line are respectively connected. , A piston forming a passage that establishes communication between the pair of connection ports, and by inserting the piston into the cylinder to control the communication state of the pair of connection ports, the suction conduit In an endoscope including a suction control device for controlling a suction operation, the suction control device is detachably attached to an endoscope operation section.

Therefore, since the entire suction control device can be removed from the endoscope, the suction control device can be easily cleaned.

[0012]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 9 show a first embodiment of the present invention. As shown in FIG. 2A, in the endoscope 50 of the present embodiment, the endoscope body is composed of the insertion section 1 and the operation section 2. The universal cord 3 is connected to the operation unit 2. The insertion portion 1 is composed of a long flexible tube portion 1a, a bending tube portion 1b connected to the tip of the flexible tube portion 1a, and a distal end hard portion 1c provided at the tip of the bending tube portion 1b.
The outer circumference of the curved tube portion 1b is covered with an outer skin formed of a soft elastic body. The distal end hard portion 1c is provided with an observation optical system, an imaging device, an illumination optical system, an air / water feeding nozzle, an opening of a forceps channel provided in the insertion portion 2 (all not shown). ing.

The operation section 2 is detachably provided with a suction control device 6 for controlling a suction operation through a suction conduit provided across the insertion section 1, the operation section 2 and the universal cord 3. That is, the suction control device 6 has a structure that can be detached from the operation unit 2 as described later. Further, the operation part 2 has an air / water supply button 7 for controlling an air / water supply operation through an air / water supply conduit provided across the insertion part 1, the operation part 2 and the universal cord 3.
, And a remote switch 8 for processing a video signal from the image pickup device, which is provided in the distal end hard portion 1c, are attached.

Further, the operating portion 2 is provided with an angle knob 9 made of a hard resin, and by rotating the angle knob 9, the bending tube portion 1b can be bent vertically and horizontally. You can do it. Further, the operation portion 2 is provided with a hard resin FE lever 10 used for holding the bending tube portion 1b in a constant bending state or conversely releasing the bending holding state of the bending tube portion 1b. It is provided.

The universal cord 3 is covered with a resin such as polyurethane. A connector 11 made of hard resin is attached to the tip of the universal cord 3. The connector 11 includes a metal ground terminal 12 for returning high frequency leakage current to the cauterization power source.
A metal gas mouthpiece 13 forming an end of the nonflammable gas supply side, a metal water mouthpiece 14 connected to a water supply tank (not shown), and a metal feed mouth connected to a compressor (not shown). A mouthpiece 15, an electrical contact 16, and a proximal end 17 of the light guide are provided. In this case, if the connector 11 is connected to the connector portion 19 of the light source device 18 shown in FIG. 2B, the illumination light from the light source device 18 can be emitted from the tip of the hard tip portion 1c.
Furthermore, the connector 11 is provided with an electric connector portion 20, and the electric connector portion 20 is connected to the connection cord 2
By connecting to the video processor 22 via 1, the image pickup signal from the image pickup device provided in the distal end hard portion 1c is processed and the observation image by the endoscope is displayed on the monitor 23.

The distal end side of the operation portion 2 is a grip portion 24 which forms a grip portion for gripping the endoscope 50.
The grip portion 24 is made of a hard resin such as polysulfone. At the tip end side of the grip portion 24, a sub water supply port 25 for feeding cleaning water for cleaning the objective lens into the insertion portion 1 and a treatment tool such as forceps in a forceps channel provided in the insertion portion 1. Forceps port 2 for introducing
And 6 are provided. Further, a forceps plug 27 formed of an elastic body such as silicon rubber is detachably attached to the forceps port 26.

One end of a suction tube 28 made of an elastic material such as silicon rubber is connected and fixed to the forceps plug 27. The other end of the suction tube 28 has the suction control device 6
It can be detachably connected to. Further, a tube fixing concave portion 29 is provided on the outer surface of the grip portion 24 so that the suction tube 28 can be detachably fixed.

As shown in FIG. 1, a suction tube 30 connected to a suction pump (not shown) is detachably connected to the suction control device 6. The suction tube 30 is formed of an elastic body such as silicon rubber or polyethylene, and can be detachably fixed to the tube fixing groove 32 of the universal cord connector 31 projecting from the operation section 2. .

Next, the suction control device mounting portion 33 provided on the operation portion 2 will be described with reference to FIGS. 3 and 4.

As shown in FIG. 3, the suction control device mounting portion 3
3, a cylinder fixing hole 35, which is a cylindrical recess provided perpendicularly to the upper surface 34 of the operation unit 2, and a longitudinal axis direction of the operation unit 2 (direction of a center line 36 in the drawing). A first ferrule fixing groove 37 and a second ferrule fixing groove 38 which are vertically provided are provided.

As shown in FIG. 4, the bottom surface 39 of the cylinder fixing hole 35 is located parallel to the upper surface 34 of the operating portion 2 and is flush with the bottom surface of the second mouthpiece fixing groove 38. ing. Moreover, the upper opening surface of the first mouthpiece fixing groove 37 is flush with the upper surface 34 of the operating portion 2, and the contour of the bottom surface is formed in a semicircular shape. The inner side surface 35a extending vertically downward from the inner end 37a of the bottom surface of the first mouthpiece fixing groove 37 forms a part of the inner surface of the cylinder fixing hole 35. That is, the inner side surface 3 is provided between the bottom surface of the cap fixing groove 37 and the bottom surface 39 of the cylinder fixing hole 35.
A step is formed by 5a, and the second cap fixing groove 38 is formed.
The cylinder fixing hole 35 having the same depth as that of the second mouthpiece fixing groove 38 is formed at the innermost end of the cylinder.

FIG. 5 shows a state in which the suction control device 6 is attached to the suction control device attachment portion 33. Suction control device 6
Is composed of a cylindrical cylinder 40 and a piston 41 inserted into the cylinder 40, and a coil spring 42 is interposed between the cylinder 40 and the piston 41. A stopper 43 made of an elastic material such as silicon rubber is attached to the bottom of the cylinder 40. The plug 43 has the same outer diameter as the cylinder 40,
3 is provided with an air leak hole 51 having a check valve structure penetrating laterally. Both the cylinder 40 and the piston 41 are made of a hard resin such as polysulfone, modified PPO, PEEK, or a metal such as stainless steel.

A piston locking projection 52 for locking the piston 41 is provided on the inner surface of the cylinder 40.
The piston locking protrusion 52 is formed in a prismatic shape, and is provided below the central portion of the cylinder 40. Further, a spring fixing portion 45 that is coaxial with the inner hole 44 of the cylinder 40 and has a larger diameter than the inner hole 44 is provided on the upper portion of the cylinder 40. The coil spring 42 has one end in contact with the end surface of the stepped portion between the spring fixing portion 45 and the inner hole 44, and the other end in contact with the inner surface of the button portion 55 of the piston 41 to be described later. It is interposed between 40 and the piston 41.

At the bottom of the cylinder 40, a plug fixing portion 46 which is coaxial with the inner hole 44 and has a larger diameter than the inner hole 44.
And an air leak hole concave portion 47 having a semicircular cross section provided in a direction orthogonal to the inner hole 44. In addition, the inner hole 44 is formed in the substantially central portion of the side wall of the cylinder 40.
A first mouthpiece portion 48 and a second mouthpiece portion 49 are projectingly provided on both sides sandwiching. Further, inside the first mouthpiece portion 48 and the second mouthpiece portion 49, the inner hole 44 of the cylinder 40 is provided.
A first suction conduit 73 and a second suction conduit 74 having the same inner diameter and communicating with each other at a right angle are formed. In this case, the axis of the suction conduit 73 and the axis of the suction conduit 74 are located on the same straight line. In addition, the first base portion 48 and the second base portion 4
The outer peripheral surface of 9 is provided with a plurality of wedge-shaped locking portions 53 and 54, respectively.

As shown in FIG. 6, the piston 41 has a columnar shape, and an upper portion thereof has a button portion 5 having an inverted U-shaped cross section.
5 is formed. Further, a through hole that is orthogonal to the longitudinal direction of the piston 41 is provided in a substantially central portion of the piston 41, and the through hole has a circular cross section that establishes communication between the suction conduit 73 and the suction conduit 74. It is formed as a channel 56.

An air insertion passage 57 is provided on the side surface of the piston 41 from its central portion to its bottom portion. Further, on the side surface of the piston 41 located on the side opposite to the air insertion passage 57, the piston 4 is attached to the piston locking projection 52 of the cylinder 40.
A piston insertion groove 58 for inserting 1 and a piston engagement groove 59 for connecting the piston 41 to the inside of the cylinder 40 are provided.

The piston insertion groove 58 is provided above the lower end portion of the piston 41 along the longitudinal direction of the piston 41, and the upper end thereof reaches the lower portion of the central portion of the piston 41. Further, the piston insertion groove 58 is further bent at a right angle from the upper end portion along the outer peripheral surface of the piston 41, and then connected to the piston locking groove 59 formed coaxially with the center line of the cross section of the fluid pipe 56. ing. In this case, the lower end of the piston locking groove 59 does not penetrate to the lower end of the piston 41.

After inserting the coil spring 42 through the piston 41, the piston 41 is inserted into the cylinder 40, and the piston locking projection 52 and the piston locking groove 59 provided on the cylinder 40 are fitted to each other. The suction control device 6 is completed by fitting the plug 43 to the bottom of the cylinder 40.

In order to fix the suction control device 6 configured as described above to the suction control device mounting portion 33, the cylinder 40 may be fitted into the cylinder fixing hole 35 as shown in FIG. At this time, the plug body 43 attached to the bottom of the cylinder 40 abuts the bottom surface 39 of the cylinder fixing hole 35. Further, the suction tube 28 and the suction tube 30 may be attached between the mouthpiece fixing groove 37 and the mouthpiece portion 48 and between the second mouthpiece portion fixing groove 38 and the mouthpiece portion 49, respectively. There is a gap.

Here, the forceps plug 27 used in this embodiment.
And the suction tube 28 is shown in FIG. The forceps plug 27 is
Hemispherical forceps plug cap portion 60, truncated cone-shaped forceps plug body portion 61, forceps stopper cap portion 60, and forceps plug body portion 6
And a connecting portion 70 that connects 1 and 1. Forceps cap 6
At 0, a slit 62 for inserting forceps is formed. Further, a cap locking protrusion 63 for fixing the forceps plug cap 60 to the forceps plug body 61 is provided over the entire circumference of the outer surface of the forceps plug cap 60. Forceps plug body 6
A cap locking portion 64 is provided above 1 over the entire circumference of the inner surface of the forceps plug main body portion 61. Further, a check valve 65 having an inverted conical shape is provided at the center of the forceps plug body 61, and further, a forceps is provided on the inner surface of the bottom of the forceps plug body 61 when the forceps plug 27 is fixed to the forceps port 26. A forceps port locking portion 66 that fits into the port 26 is provided over the entire circumference. Further, the suction tube connection hole 6 having a circular cross section is provided on the side surface opposite to the side surface of the forceps plug main body portion 61 provided with the connecting portion 70.
7, the suction tube 28 is bonded and fixed to the suction tube connection hole 67.

8 and 9 show a state in which the suction tube 28 and the suction tube 30 used in this embodiment are fixed to the operation portion 2 of the endoscope 50. As shown, the tube fixing recess 29 is provided along the corner of the upper surface of the grip portion 24, and the length thereof is the grip portion 24.
Over the entire length of. The tube fixing recess 29 has a groove diameter larger than the outer diameter of the suction tube 28, and an inner surface forming the recess is formed into a smooth curved surface. The tube fixing recess 29 is provided with two sets of tube fixing protrusions 68. The tube fixing projection 68 has a C-shaped cross section, and the suction tube 28 is fitted into the C-shaped projection 68 to fix the suction tube 28 in the tube fixing recess 29.

As shown in FIG. 8, the suction tube 28 fixed in the tube fixing recess 29 is bent at a right angle at the joint between the grip portion 24 and the angle mechanical casing 71, and the angle mechanical casing 71 is further bent. It is fixed in the tube fixing recess 72 provided in the. The suction tube 28 bent at a right angle along the joint between the grip portion 24 and the angle mechanical casing 71 is further bent at a right angle toward the hand side of the operation section 2 at the end of the tube fixing recess 72. Finally, it is bent again at a right angle so as to be parallel to the above-mentioned joining portion, and thereafter, it is locked and connected to the locking portion 53 of the first mouthpiece portion 48 provided in the suction control device 6.

Further, as shown in FIG. 9, the suction tube 3
0 is bent at a right angle after being connected to the wedge-shaped locking portion 54 of the second mouthpiece 49, and is fixed to the tube fixing groove 32 provided in the universal cord connecting protrusion 31.

As described above, the endoscope 5 according to the present embodiment.
With 0, the entire suction control device 6 can be detached from the operation unit 2, so that the suction control device 6 has good washability. Further, since the suction tubes 28, 30 are detachably fixed while being exposed to the outside of the endoscope 50, and the suction tubes 28, 30 are detachable with respect to the suction control device 6, the suction tubes 28, 30 are provided. Is easy to wash.

Further, conventionally, a forceps channel for guiding a treatment tool such as forceps and a suction conduit for sucking body fluid etc. have a common conduit over substantially the entire length of the insertion part 1, and the proximal side of the insertion part 1 The structure is such that they are branched inside each other (near the forceps port 26), but in this embodiment, the suction tube 28 is directly connected to the forceps plug 27 attached to the forceps port 26 communicating with the forceps channel. Since the forceps channel and the suction tube 28 (suction line) are linearly arranged to eliminate the branching portion, the cleaning performance is improved and reliable cleaning can be performed.

FIG. 10 shows a second embodiment of the present invention. The endoscope of the present embodiment has the same structure as that of the first embodiment except the structures of the suction control device 6 and the suction control device attachment portion 33. Therefore, only the differences from the first embodiment will be described below.

In this embodiment, an annular piston locking groove 75 is provided around the entire lower portion of the piston 95 which constitutes the suction control device 6. Further, inside the cylinder 110 into which the piston 95 is inserted, a relief portion 79 having a diameter larger than that of the inner hole 44 of the cylinder 110 is provided from the lower center portion to the bottom portion. An air leak hole 51 having a circular cross section is provided on the lower side surface of the cylinder 110. Further, a stopper 76 is provided on the bottom of the cylinder 110. The plug 76 has an upper part formed in a truncated cone shape and a lower part formed in a cylindrical shape. A circular hole 80 is formed in the center of the upper surface of the stopper 76,
Around the circular hole 80, a piston locking projection 77 is provided. Then, by fitting the piston locking groove 75 and the piston locking protrusion 77, the upward movement of the piston 95 due to the restoring force of the coil spring 42 is prevented. Further, the cylinder 110 is fitted into the cylinder fixing hole 35 in a state where the bottom of the plug body 76 is in contact with the bottom surface 39 of the cylinder fixing hole 35.

Even if the piston 95 is pushed downward as much as possible, the lower end portion of the piston 95 will be in the cylinder fixing hole 35.
It does not come into contact with the bottom surface 39 of the. Further, in the above configuration, even if the plug body 76 is deformed, the deformed portion of the plug body 76 can escape to the escape portion 79, so that the deformed portion of the plug body 76 is not caught on the inner wall of the cylinder 110.

Further, in the present embodiment, as shown in FIG. 11, a first mouthpiece fixing groove 37 and a second mouthpiece fixing groove 38.
And are provided at an angle of, for example, 60 degrees or 45 degrees without being orthogonal to the longitudinal direction of the operation unit 2.

Therefore, in the above-described structure, unlike the first embodiment, the projection 52 for locking the piston 41 is not provided on the inner surface of the cylinder 40, and the piston 95 is formed by the plug body 76 separate from the cylinder 110. Since the protruding part is eliminated inside the cylinder 110 by locking the
The cleanability of the inside of the cylinder 110 is better than that of the first embodiment.

Further, since the mouthpiece fixing groove 37 and the mouthpiece fixing groove 38 are not orthogonal to the longitudinal direction of the operating portion 2, when the suction tube 28 is connected to the suction control device 6, the end portion of the suction tube 28 is connected. Since it is not necessary to bend at a right angle as in the first embodiment, the load on the suction tube 28 is reduced and its durability is improved.

12 to 14 show a third embodiment of the present invention. The endoscope of the present embodiment includes the structure of the suction control device 6 and the suction control device attachment portion 33, and the forceps plug 2.
The structure is the same as that of the first embodiment except the connecting portion between the suction tube 28 and the suction tube 28. Therefore, only the differences from the first embodiment will be described below.

In this embodiment, an annular piston locking groove 75 is provided around the entire lower portion of the piston 96 constituting the suction control device 6. The plug 81 attached to the bottom of the cylinder 111 is formed in a disk shape and has a circular hole 78 in the center of the upper surface thereof. Further, the thickness of the plug 81 is formed to be equal to the groove width of the piston locking groove 75. By fitting the piston locking groove 75 and the hole 78, the upward movement of the piston 96 due to the restoring force of the coil spring 42 is prevented.

Further, in this embodiment, FIG. 12 and FIG.
As shown in FIG. 3, a cylinder outer peripheral portion holding base 82 having a C-shaped cross-sectional shape is provided below the cylinder fixing hole 35. Therefore, the cylinder 111 is attached to the cylinder fixing hole 3
5, the bottom of the plug 81 abuts the cylinder outer peripheral holding base 82, and a piston escape space 83 is formed between the cylinder 111 and the bottom surface 39 of the cylinder fixing hole 35. When the piston 96 locked by the stopper 81 is pushed downward, the stopper 81 elastically deforms and enters the piston escape space 83 together with the piston 96.
At this time, even if the piston 96 is pushed downward as much as possible,
The piston 96 and the plug 81 are located on the bottom surface 3 of the cylinder fixing hole 35.
It does not come into contact with 9.

FIG. 14 shows the suction tube 28 and the forceps plug 27 in this embodiment. The forceps plug 27 is the first
The structure is the same as that of the above embodiment. In addition, at the end of the suction tube 28, two annular suction tube locking projections 6 are provided.
9 is provided. Two suction tube locking projections 6
The distance between 9 and 69 is equal to the thickness of the outer wall of the forceps plug body 61, and the tube portion between the suction tube locking projections 69 and 69 is connected to the suction tube connection hole 67 of the forceps plug body 61.
The suction tube 28 can be fixed to the forceps plug main body 61 by fitting it into The end of the suction tube 28 is a cantilever check valve 85 that extends to the opening of the check valve 65 of the forceps plug body 61. The suction tube 2
Both 8 and the forceps plug 27 are made of an elastic body such as transparent silicone rubber.

Therefore, in the above configuration, the cylinder 11
Since the piston 96 is locked by the plug 81 that is attached to the bottom of the cylinder 1 and does not project into the cylinder 111, the protrusion inside the cylinder 111 is eliminated. It will be better than that.

Further, in the above structure, the check valve 85 provided at the end of the suction tube 28 allows back flow of filth and the like through the opening of the check valve 65 at the time of inspection and treatment by the endoscope 50. Can be prevented. Furthermore, since the suction tube 28 and the forceps plug 27 are made of a transparent material, it is possible to easily confirm the dirt attached to the inside of the forceps plug 27 and to perform reliable cleaning.

15 to 17 show a fourth embodiment of the present invention. The endoscope of this embodiment has the same structure as that of the first embodiment except for the structures of the suction control device 6 and the suction tube 28. Therefore, only the differences from the first embodiment will be described below.

As shown in FIG. 15, the cylinder 112 has an inner hole 90 at the center of the inside thereof. At the upper part and the lower part of the inner hole 90, there are relief portions 9 each having a diameter larger than that of the inner hole 90.
1 is provided. Further, a relief portion 92 having an outer diameter smaller than that of the central portion of the piston 97 is provided on each of the upper portion and the lower portion of the piston 97.

16 and 17 show a state in which the suction tube 93 used in this embodiment is attached to the endoscope. Both ends of the suction tube 93 are formed to have a circular cross section, and the central portion of the suction tube 93 is formed to have a flat cross section (see (b) and (c) of FIG. 16). The connection method between the forceps plug body 61 and the suction tube 93 is the connection method shown in the first embodiment (shown in FIG. 7).
Is the same as.

Further, on the grip portion 24, tube fixing projections 94, 94 for fixing the suction tube 93.
Are provided in two places. A pair of projecting pieces 94a, 94b constituting these tube fixing projecting parts 94, 94.
Are provided symmetrically with respect to the center line of the grip portion 24, as shown in FIG. The height of the tube fixing protrusions 94, 94 is equal to or lower than the height of the central portion of the suction tube 93. In this embodiment, the tube fixing protrusions 94, 94 are provided at two places, but more or more than one may be provided, or they may be provided over the entire length of the grip portion 24. I don't mind.

Therefore, in the above configuration, since the relief portions 91 and 92 are provided in the cylinder 112 and the piston 97 of the suction control device 6, respectively, the cylinder 112 and the piston 9 are provided.
The coaxial accuracy of the fitting portion with 7 is improved. Further, since the suction tube 93 has a flat cross section and the flat suction tube 93 is fixed on the grip portion 24, the cross-sectional area of the suction tube 93 becomes larger and the suction performance is improved.

18 to 20 show a fifth embodiment of the present invention. The endoscope of the present embodiment has the same structure as that of the first embodiment except for the structure of the suction control device 6 and the connecting portion between the forceps plug 27 and the suction tube 28. Therefore, only the differences from the first embodiment will be described below.

As shown in FIGS. 18 and 19, the cylinder 113 of the suction control device 6 is formed in a bottomed cylindrical shape. Further, the air insertion passage 115 is formed on the outer surface of the piston 98.
Is provided. The air insertion portion 115 is formed as a rectangular groove portion, and extends in the up-down direction around the fluid pipe line 56 provided in the central portion of the piston 98. The width of the air insertion passage 115 is formed to be equal to or smaller than the inner diameter of the fluid conduit 56.

When the piston 98 is pushed up most by the coil spring 42, the air insertion passage 11
The lower end of 5 and the lower end of the suction pipe line 74 are adapted to coincide with each other. At this time, the upper end of the air insertion portion 115 communicates with the outside at the upper portion of the cylinder 113.

As shown in FIG. 19, a piston insertion groove 58 and a piston locking groove 59 having the same shape as those of the first embodiment are provided in the lower portion of the piston 98. Further, as shown in FIG. 20, in the suction tube connection hole 67 of the forceps plug body 61 of the forceps plug 27 having the same structure as that of the third embodiment, the suction tube 28 (locking protrusion 69 having the same structure as that of the third embodiment is provided. And a check valve 85) are connected, and the suction tube 116 is fitted on the outer circumference of the suction tube 28.

21 to 23 show a sixth embodiment of the present invention. The endoscope of the present embodiment includes the structure of the suction control device 6 and the suction control device attachment portion 33, and the forceps plug 2.
The structure is the same as that of the first embodiment except the connecting portion between the suction tube 28 and the suction tube 28. Therefore, only the differences from the first embodiment will be described below.

As shown in FIG. 21, the suction control device 6 used in this embodiment has the same structure as that of the fifth embodiment. As shown in FIG. 22, the suction control device attachment portion 33 to which the suction control device 6 is attached includes a cylinder fixing hole 35 having a semicircular cross section and a mouthpiece fixing groove having the same width as the diameter of the cylinder fixing hole 35. And 38. At the boundary between the cylinder fixing hole 35 and the mouthpiece fixing groove 38, the cylinder locking projection 120 positioned parallel to the longitudinal direction (direction of the center line 36) of the operating portion 2 is formed in the mouthpiece fixing groove 38. It is projected toward the inside. In this embodiment, the angle mechanical casing 71 is made of a material harder than the cylinder 113. Therefore, the cylinder 113 is shown in FIG.
When inserted along the mouthpiece fixing groove 38 from the right direction of 2,
While the cylinder 113 elastically deforms, the cylinder 113 gets over the cylinder locking projection 120 and is fixed to the cylinder fixing hole 35 by a snap fit, for example.

Further, as shown in FIG. 23, in the present embodiment, a connecting tube 117 made of metal or a hard resin such as polysulfone, PEEK or modified PPO is provided in the suction tube connecting hole 67 provided in the forceps plug 27. It is connected. The connecting tube 117 is provided with the suction tube locking projection 69 shown in the third embodiment.

24 to 27 show a seventh embodiment of the present invention. The endoscope of this embodiment has the same structure as that of the first embodiment except for the structures of the suction control device 6 and the suction control device attachment portion 33. Therefore, only the differences from the first embodiment will be described below.

As shown in FIG. 24, in this embodiment, the cylinder fixing hole 121 of the operating portion 2 has a rectangular cross section. Further, cylinder fitting protrusions 122 having a rectangular cross section are provided on both side surfaces of the central portion of the cylinder fixing hole 121. The suction control device 6 used in this embodiment has the same conduit configuration as the suction control device 6 shown in the fifth embodiment. However, the cylinder 114 has a rectangular cross section, and cylinder fitting recesses 123 having a rectangular cross section are provided on both side surfaces of the cylinder 114.

When the suction control device 6 having the above structure is attached to the suction control device mounting portion 33, the suction control device 6 is inserted along the groove from the right side of FIG. 24, and the cylinder fitting protrusion 122 and the cylinder fitting recess 123 are inserted. Fig. 25 by fitting and
State. After that, polysulfone is modified in a pair of fixing plate locking grooves 124 (having a rectangular cross section) provided on the inner surface of the cylinder fixing hole 121 and positioned parallel to the longitudinal direction (direction of the center line 36) of the operating portion 2. PPO, PEE
A fixing plate 125 made of a resin such as K or polyethylene or a metal is fitted as shown in FIG. 26 to prevent the suction control device 6 from shifting in the lateral direction. The fixed plate 125 has the same thickness as the width of the fixed plate locking groove 124, and the base portion insertion portion 126 into which the base portion 49 can be inserted.
Is equipped with.

The structure of the suction control device shown in each of the above embodiments may be applied to the air / water supply control device 7 and the gas supply control device provided in the operation section 2 of the endoscope 50.

Next, an eighth embodiment of the present invention will be described. 29 is a side view of the operation section 2 of the endoscope, and FIG.
The top view of the operation part is shown in FIG. A grip 24 made of a hard resin such as polysulfone for holding the endoscope is provided below the operation unit 2 of the endoscope. A forceps port 26 for inserting a treatment tool such as forceps through the grip 24.
Is provided. A forceps plug 27 made of an elastic material such as silicon rubber is attached to the forceps port 26.

FIG. 28 shows the construction of the suction conduit system 469 in this embodiment. Inside the insertion part 1, a suction channel 470 having an opening on one side is provided in the distal end hard part 5. The opposite end of the suction channel 470 extends to the forceps port 26 and is open. A forceps plug 27 having a duct therein is attached to the forceps port 26, and a duct branch member 229 for branching the duct from the forceps plug 27 is provided. The duct branch member 229 has a first suction tube. 28 is connected, and the first suction tube 28 is connected to the inlet pipe line 256 of the suction control device 6.
Further, an outlet pipe line 255 is provided from the suction control device 6 to which the second suction tube 30 is connected.
The second suction tube 30 is a suction tube fixing member 235.
The third suction tube 36 is connected to the third suction tube 236 via the, and the third suction tube 36 is connected to the suction pump 471 to form a suction pipeline system 469.

FIG. 31A shows a piston 241 attached to the suction control device 6 used in this embodiment.
The piston 241 is made of a hard resin such as polysulfone, modified PPO, polyester, polycarbonate, polyethylene, or fluororesin, or a metal such as stainless steel, brass, or aluminum, and has a cylindrical portion 242 that is a cylindrical body having a cylindrical cross-section. The push button portion 243 is a tubular body having a diameter larger than that of the tubular portion 242. The tubular portion 242 and the push button portion 243 are provided on a concentric shaft and are integrally formed. Push button 24
A rotation preventing column 248 for preventing rotation of the piston is provided so as to extend from the lower end portion of 3. A pin 249 that serves as a guide pin for the piston 241 when the piston 241 moves is provided inside the root portion of the rotation prevention column 248. In addition, the joint portion between the rotation preventing column 248 and the push button 243 is strengthened by the reinforcing portion 453. As shown in FIG. 31B, the pin 249 has a columnar shape with a circular cross-sectional shape. Pin 24
The cross-sectional shape of 9 is not limited to a circular cross-sectional shape, and for example, a square,
It may be rectangular or oval.

FIG. 32 shows a vertical sectional view of the piston 241. The second sliding portion 472, which slides inside the cylinder of the tubular portion 242, has an outer periphery formed by a vertical cylindrical surface without taper. Further, the upper portion of the second sliding portion 472 is a second tapered portion 473 having a tapered shape that spreads upward. Inside the tubular portion 242, there is a taper conduit 244, which is a tapered conduit, an upper opening 245 at the upper end side surface of the tapered conduit 244, and a lower end opening 2 at the lower end.
46, a lower end side surface opening 247 is provided on each of the lower end side surfaces. When viewed from the front, the upper opening 245 has a shape in which a rectangle and a semicircle having the long side of the rectangle as a diameter are combined as shown in FIG. Therefore, it has a larger area than a circle of the same diameter.

In the present embodiment, the upper opening 245 and the lower opening 246 are provided at a position forming an angle of 125 degrees in the horizontal plane as shown in FIG. Further, a first chamfered portion 253 is provided at the lower end of the tubular portion 242 over the entire circumference. A rib 250 is provided inside the push button portion 243. In addition, the inside of the push button portion 243 has a tapered shape that widens from the upper side to the lower side. FIG. 34 shows a cross-sectional view of the piston 241. In this embodiment, as shown in FIG. 34, the ribs 250 are provided at three locations on the circumference at equal intervals, but the number is not limited to three, and more or less ribs may be provided. In addition, a lightening portion 451 formed by removing the inside of the tubular portion is provided on the upper portion of the tubular portion 242.
Also, a second hole 452 is provided at a position facing the lightening portion 451 of the push button portion 242.

Further, as shown in FIG. 33, the button portion upper surface 251 is provided with a plurality of openings 252. The opening 252 and the rib 250 are provided at positions on the plane that do not interfere with each other. Upper opening 2 of push button 243
At a position facing 45, a button cutout 290 is provided by cutting out the push button 243 so that the upper opening 245 can be seen from the outside.

The cylinder 25 attached to the suction control device 6 used in this embodiment is shown in FIGS. 35 (a) and 35 (c).
4 is shown. Cylinder 254 is polysulfone, Noryl,
It is formed of a hard resin such as modified PPO, polyester, polycarbonate, polyethylene, or fluororesin, or a metal such as stainless steel, brass, or aluminum. FIG. 35 (a) is a view of the cylinder 254 seen from the upper surface, and FIG. 35 (c) is a view of the cylinder 254 seen from the side. The cylinder 254 is provided with a second tubular portion 257 having a cylindrical cross-sectional shape, and an outlet pipeline 255 and an inlet pipeline 256 are provided on the side surface of the second tubular portion 57. . The outlet line 255 and the inlet line 256 are
As shown in (a) of FIG. 35, an angle of 125 degrees is formed on the plane. In this embodiment, this angle is 125 degrees,
Other angles may be used. Further, as shown in (c) of FIG. 35, the outlet pipe line 255 and the inlet pipe line 256 are provided at positions vertically displaced from each other.

The outlet pipe line 255 and the inlet pipe line 256 attached to the cylinder 254 are provided at right angles to the center line 445 of the cylinder 254. In this embodiment, both the inlet pipe line 256 and the outlet pipe line 255 are mounted in a direction orthogonal to the cylinder center line 454, but any angle other than 90 degrees may be used as long as the angle is close to a right angle. .

The tube abutting portion 455 is attached to the outer peripheral portion of the inlet pipe line 256 so that the end portion of the first suction tube 28 abuts when the first suction tube 28 is connected.
Is provided. The cross section of the inlet pipe line 256 is shown in FIG.
As shown in FIG. 5B, it has a non-circular cross-sectional shape formed by two parallel planes and a circle.

Further, on the side surface of the second tubular portion 257, a pin introduction groove portion 258 and a pin insertion groove portion 259 are provided in a direction parallel to the center line 454 of the second tubular portion 257. The pin introduction groove portion 258 and the pin insertion groove portion 259 are communicated with each other by the transition groove portion 260. Also, the pin introduction groove 2
A second chamfer 262 is provided at the upper open end 261 of 58.

The outlet pipe line 255 is provided with a syringe taper-shaped portion 263 having a syringe taper outer shape, and the syringe taper-shaped portion 263 and the second tubular portion 25.
A flange 264 having a width larger than the outer diameter of the syringe tapered portion 263 is provided between the two. FIG. 37
As shown in FIG.
65 is provided.

Spring locking means 266 are provided at four positions at equal intervals of 90 degrees on the upper end of the cylinder 254. One of these is smaller in size than the other locking means.
In this embodiment, there are four spring locking means 266, but this may be four or more or four or less. At least one of the plurality of spring locking means 266 is provided with a spring end fixing groove 267 as shown in FIG. The spring fixing groove 267 has a taper shape whose groove width changes in the circumferential direction. Further, the spring locking means 266 not provided with the spring fixing groove 267 has a triangular cross section as shown in FIG. A plurality of positioning ribs 2 are provided on the lower outer circumference of the second tubular portion 257.
68 are provided at intervals of 90 degrees. In the present embodiment, the positioning ribs 268 are provided at three positions at intervals of 90 degrees, but the number of the positioning ribs 268 and the mounting interval may be at three positions, other than 90 degrees.

Further, FIG. 36 shows a cross section of the cylinder 254. The first R chamfered portion 4 is provided on the bottom of the inner surface of the cylinder 254.
56 and a second R chamfer 457 is provided on the bottom of the outer surface. The piston sliding surface 458 of the cylinder 254 has a circular cross section. Further, the inner surface of the piston sliding surface 458 is vertical, and the inner surface is not tapered. A fifth taper portion 460a that opens upward is provided above the portion of the piston sliding surface 458 where the inlet pipe line 256 opens, and this portion contacts the cylindrical portion 242 of the piston 241. There is no such thing. The angle of the fifth taper portion 460 is about 1 to 5 degrees. Further, the distance 461 between the lower end of the tapered portion 460 and the upper portion of the inlet pipe line 256 is at least 1.5 m.
There is a space of m or more, and it acts as a sealing surface for ensuring water tightness between the partial cylinder 254 and the piston 241.

39 (a) and 39 (b), the elbow member 2 attached to the suction control device 6 used in this embodiment.
70 is shown. The elbow member 270 is provided therein with a taper conduit 272 having a second syringe taper-shaped part 299 and a straight conduit 273 orthogonal to the taper conduit 272. The inner surface of the taper conduit 272, the inner surface of the orthogonal conduit 273, and the joint between the two are smooth surfaces without steps. Further, the second ribs 269 are provided at three locations on the outer circumference of the tapered conduit 272 at intervals of 90 degrees. Further, a parallel flat surface portion 274, which is two surfaces parallel to each other, is provided by cutting out the outer circumference of the tapered pipe path 272. The outer shape of the end of the direct passage part 273 is a tapered part 275 which is processed into a tapered shape for attaching the suction tube.

FIG. 40A shows a top view of the operating section 2 used in this embodiment, and FIG. 40B shows a side view of the operating section 2. A fixing hole portion 276 for attaching the suction control device 6 is provided between the air / water feeding valve 7 and the remote switch 8 provided in the operation portion 2. Fixing hole 2
Reference numeral 76 is composed of a side wall portion 277 composed of two surfaces parallel to each other and a curved wall surface 278 which is a surface having a semicircular horizontal cross-sectional shape connecting the side wall portions 277. Also, the curved wall 2
At a position facing 78, a side opening 280 that opens to a side surface 279 of the operation portion 2 that is a side surface of the operation portion 2 is provided, and an upper opening 281 is provided at the upper surface of the operation portion. Side wall 27
No. 3 on the side of the operation portion side surface 279 of No. 7 protruding from the side wall portion
Ribs 282 are provided. The fixing hole portion 276 is also provided in a direction orthogonal to the long axis direction of the operation portion 2.

FIG. 41 shows a piston sliding spring 283 attached to the suction control device 6 used in this embodiment. End turns 284 are provided at both ends of the spring 283, and the tip end of the end turn 284 is a tapered mounting portion 285.

FIG. 42 shows a method for assembling the suction control device 6 used in this embodiment and a method for mounting the suction control device 6 on the operating portion 2. First of all, the spring 2 is attached to the cylinder 254.
Assemble 83. As shown in FIG. 44, the cylinder 254
After the tapered portion 285 of the spring 283 is fitted in the spring end fixing groove 267 which is a tapered groove provided in one of the spring locking means 266 in the upper part of this, this is adhesively fixed by an adhesive material. . Since the spring 283 is fixed by adhesion,
When the suction control device 6 is disassembled and cleaned, the spring 283 causes the cylinder 2 to
It does not come off from 54. Also, as shown in FIG. 46, it is possible to provide locking means 266 on the inner peripheral surface of the cylinder 254 and lock the spring 283 or adhesively fix it there.

Next, the piston 24 is placed inside the cylinder 254.
Insert 1. At this time, the piston 2 is inserted so that the pin 249 provided inside the push button portion 243 is engaged with the pin introduction groove portion 258 provided on the outer periphery of the cylinder 254.
The mounting position is adjusted while rotating 41 with respect to the cylinder 254. Since the pin 249 is provided at the base portion of the rotation prevention column 248, the pin 245 can be engaged with the pin introduction groove portion 258 by using this rotation prevention column 248 as a guide. As shown in FIG. 47A, when the piston 241 is pushed in after the pin 249 is engaged with the pin introduction portion 258, the pin 249 reaches the right end portion of the transition groove portion 260. When the piston 241 is rotated leftward in the figure as shown in FIG. 47 (b), the pin 249 reaches the pin insertion groove portion 259. Therefore, if the external force applied to the pin is eliminated, the spring 283
The pin 249 is engaged with the pin insertion groove portion 259 by the reaction force of. As a result, the piston 241 is attached at a predetermined position, and as shown in FIG. 47 (c), the pin 249 moves vertically inside the pin insertion groove portion 259 during actual use. The length of the pin insertion groove portion 259 is equal to or longer than the distance that the piston 241 moves in the vertical direction inside the cylinder. Further, the lower end portion of the pin insertion groove portion 259 is an open end 289 having no wall in this embodiment, but a wall may be provided.

Next, a method of attaching the suction control device 6 to the operation portion main body will be described. Piston 24 in cylinder 254
1. The cylinder 254 of the suction control device 6 in which the spring 283 is assembled is fixed hole 276 provided in the operation portion main body.
Inset. Although the width of the fixing hole portion 276 is made larger than the outer diameter of the second tubular portion 257, the second rib 26
8 is between the fixing hole 276 and the cylinder 254,
The cylinder 254 does not rattle inside the fixing hole 276. In addition, the outer diameter of the outlet pipe line 255 has a fixed hole narrow portion 29.
Since it is smaller than 1, it fits within the narrow portion 291 of the fixing hole. Further, at this time, the flange 264 is provided at a position that does not fit in the narrow portion of the fixing hole, and the cylinder 254 is fixed to the fixing hole portion 27.
When trying to rotate inside 6, the flange 264 abuts the side wall portion 277, so that rotation can be prevented. In this state, as shown in FIG. 43, the rotation preventing column 248 is provided with the side wall portion 277 of the fixing hole portion 276, the flange 264, and the outlet pipe 25.
5 and is accommodated in the space surrounded by the second tubular portion 257. Further, the center line 454 of the cylinder 254 and the center 468 of the fixing hole portion are coaxial with each other.

As shown in FIG. 45, an overhanging surface 49 connecting the flange 264 and the tubular portion 257 so that foreign matter does not enter the space on the opposite side of the space in which the rotation preventing column 248 is housed.
5 may be provided.

Next, the second syringe taper portion 299 provided on the inner surface of the elbow member 270 and the outlet pipe line 255.
The syringe taper-shaped portion 263 provided in the above is fitted. Since the syringe tapers are fitted to each other, this portion will not come off during normal use. Also, at this time, FIG.
2nd rib 269 and 3rd rib 282 as shown in FIG.
However, since the parallel flat surface portion 274 and the third rib 282 contact each other, the elbow member 270 does not rotate with respect to the fixing hole portion 276. At the same time, the cylinder 254 in FIG.
Even if an upward force is applied to the cylinder 254, the second rib 269 and the third rib 282 come into contact with each other, so that the cylinder 254 does not come off in the upward direction.

Further, FIG. 50 is a side view and FIG. 51 is a top view showing a state where the suction control device is attached to the operation section 2. The inlet pipe line 256 has a first suction tube 2
8 is connected, and this joint portion projects above the casing body 271a of the operation portion 2. As shown in FIG. 30, the first suction tube 28 passes through the side surface of the switch pedestal 462 and reaches the second tube fixing groove 464 provided in the switch box 463. After that, it moves downward along the second tube fixing groove 464 and is guided to the fixing groove portion 230 provided in the lower portion of the casing body 271a of the operation portion 2. The first suction tube 28 that has passed through the fixing groove 230 is connected to the conduit branching member 229 attached to the forceps plug 27. At this time, the outlet conduit 255, the inlet conduit 256, the elbow member 270, the first conduit
The suction tube 28 and the second suction tube 30 are all of the casing cover 271b and the casing body 271a.
It is provided outside of. In addition, the casing body 271
A retaining rib 474 for retaining the casing cover 271b is provided inside a. Therefore, the piston 2
Even if 41 is pushed in, the casing cover 271b can be prevented from being deformed downward.

The second suction tube 230 is connected to the elbow member 270 connected to the outlet pipe line 255. The second suction tube 230 is guided downward through the upper portion of the universal cord connection portion 238 provided so as to project on the casing cover 271b provided in the operation portion 2. In the present embodiment, the upper section of the universal cord connecting portion 238 has a shape without a recess as shown in FIG. 49 (b), but as shown in FIG. 49 (c), a recess 238a is provided.
It is also possible to provide and to pass the second suction tube 30 through this portion. When the suction tube is passed through the recess 238a, the operability of the operation unit 2 is improved because the portion where the second suction tube 30 projects above the operation unit 2 is reduced.

The second suction tube 30 guided downward is connected to a third suction tube 236 connected to a suction pump (not shown) via a suction tube fixing member 235 attached to the universal cord 3. In the present embodiment, the first suction tube 28 and the second suction tube 30 are made of the same material and have the same outer diameter, inner diameter, length and the like. However, the first suction tube 28 and the second suction tube 30 may have different materials such as outer diameter, inner diameter, and length. Further, although the cross-sectional area of the conduit connecting the forceps plug 27 and the suction control device 6 and the cross-sectional area of the conduit connecting the suction control device 6 and the suction pump are the same in this embodiment, they may be different. In addition, the first suction tube 28, the second
Both the suction tube 30 and the third suction tube 236 are bent at a bending radius of about 0.8 to 10 times the inner diameter or the outer diameter of the tube. Further, as shown in FIG. 52, the first suction tube 2
8, second suction tube 30, third suction tube 23
6 may be connected by the tenth connecting member 300 and supplied. Further, not only the suction tube but also parts for the endoscope made of the same material may be connected and supplied. In the present embodiment, as shown in FIG. 30, the diameter of the push button portion 243 of the suction control device 6 is larger than the diameter of the push button 475 of the air / water feeding valve 7, but the push button portion 243 and the push button portion 243 are larger. The parts 475 have the same diameter,
The push button portion 475 may be larger than the push button portion 243.

Further, as shown in FIG. 53, in the natural state where the suction operation is not performed, the position of the push button portion 243 of the suction control device 6 is set to the push button portion 475 of the air / water feeding valve 7.
Is higher than. Even when the push button portion 243 and the push button portion 475 are respectively most pushed in the downward direction, the position of the push button portion 243 is the push button portion 475.
Is higher than. However, this height relationship may be such that either the push button 243 or the push button portion 475 is higher, or both heights are the same.

Further, in this embodiment, the endoscope in which the suction control device 6 is detachably attached from the operation portion 2 is shown, but the position where the suction control device 6 is attached and the height of the push button portion 243 are different. , The suction control device (not shown) is substantially equal to the mounting position of the suction control device of the second endoscope fixed to the operation portion and the height of the push button, so that the operability between the two is substantially the same. Can be unified and the operator's operational feeling is not impaired.

As described above, the suction pipe line 46
9 and the suction control device 6 is fixed to the operation unit 2. Cylinder 254 as mentioned earlier
Is fixed to the operating portion 2 by fitting the syringe taper provided on the outlet pipe line 255 and the elbow member 270,
This syringe taper can be removed if desired. Therefore, the suction control device 6 is detachably attached to the operation unit 2.

A cross section of the suction valve in this state is shown in FIG. FIG. 56B shows a state where the piston 241 is pushed in. By pushing the piston 241, the inlet pipe line 256, the upper opening 245, the taper pipe line 2
44, the lower end side surface opening 247, and the outlet opening 255 are communicated with each other to perform a suction operation. When the piston 241 is pushed downward to the maximum extent, the end of the push button portion 243 and the flange 264 come into contact with each other to act as a stopper for the piston. At this time, the spring 2 is compared with the height of the spring storage portion 459.
Since the height of 83 is high, the wires of the spring 283 do not come into close contact with each other, so that there is no concern that the wires of the spring 283 will come into contact with each other during operation to generate noise.

By the way, the outer diameter of the second sliding portion 472 of the tubular portion 242 is smaller than the inner diameter of the piston sliding surface 458 inside the cylinder 254. Therefore, when the suction operation is performed, the fluid 486 flowing in the pipe is
6 (c), the piston sliding surface 458 and the second
Between the piston 241 and the cylinder 254 to keep watertightness.

By the way, when the suction control device 6 is fixed to the operation portion 2, even if the piston 241 is pushed in, the piston 241 is prevented from rotating by the pin 249 which moves up and down in the pin insertion groove portion 259. . When the pin 249 approaches the transition groove 260, the piston 24
Even if the pin 249 tries to move to the transition groove portion due to the force of rotating the 1st rotation pin 1, the rotation preventing column 24 as shown in FIG.
8 is a side wall portion 277 of the fixing hole portion 276, a flange 264,
Since it is surrounded by the outlet pipe line 255 and the second tubular portion 257, it does not rotate.

In the present embodiment, the suction control device 6 is described, but the present invention is not limited to the suction control device, and can be applied to other conduit switching control devices such as the air / water supply valve 7. Is.

By the way, as shown in FIG. 54, the first suction tube 28 may be fixed to the tube fixing groove 30 and then covered with the tube cover 303. By providing the tube cover 303, there is no need to worry about crushing the first suction tube 28 by hand when gripping the grip 24.
Although the first suction tube 28 is fixed to the lower side of the grip 24 in this embodiment, it may be fixed to the side surface or the upper surface of the grip and then covered with the tube cover 303.

Further, the configuration shown in FIG. 55 has the shape of the end portion of the spring 283 and the method of fixing the spring, and the piston 2
The structure is the same as that of the eighth embodiment except the locking means between 41 and the cylinder 254. As shown in FIG. 55B, the second pin introduction groove portion 358 and the second pin insertion groove portion 35.
9. The second transition groove portion 360 is provided inside the push button portion 243 of the piston 241. A lower opening end 36 that opens downward is provided at the lower end of the second pin introduction groove 358.
4 are provided. Furthermore, the lower open end 364 has a third
The chamfered portion 363 is provided. The second pin insertion groove 359 does not have the open end shown in the eighth embodiment.

As described above, in this embodiment, the suction control device 6 is detachably attached from the operation portion 2 of the endoscope, and the inlet pipe line 256 and the outlet pipe line 255 of the suction control device 6 are attached.
Are both provided outside the operation unit 2. Therefore, when cleaning the suction control device 6,
Can be removed together with the pipeline that goes in and out of the suction control device 6, so that the cleanability of the suction control device 6 is improved.

Further, in this embodiment, both the inlet pipe line 256 and the outlet pipe line 255 provided in the suction control device 6 are provided at right angles or at right angles to the center line of the cylinder 254 of the suction control device 6. Has been. Therefore, the directions of the pipelines such as the suction tubes 28 and 30 connected to the inlet pipeline 256 and the outlet pipeline 255 of the suction control device 6 can be easily changed.

Further, in this embodiment, another conduit member 270 is fitted into the conduit attached to the suction control device 6, and the suction control device 6 is used for the endoscope by using this conduit member 270. It is detachably attached to the operation unit 2. As a result, the suction control device 6 can be attached to and detached from the operation portion 2 with certainty.

Further, in this embodiment, a rotation preventing column 248 as a rotation preventing means for the piston 241 attached to the suction control device 6 is provided outside the suction control device 6.
Since the rotation preventing column 248 is accommodated in the space surrounded by the side wall portion 277 of the fixing hole portion 276, the flange 264, the outlet pipe line 255, and the second tubular portion 257, the piston 241 is rotated while the piston 241 is pushed in. Even if the force for moving is applied, the rotation preventing column comes into contact with any of the side wall portion 277, the flange 264, the outlet pipe line 255, and the second tubular portion 257, so that the piston 241 is accidentally disengaged from the cylinder 254. Disappears.

Further, in this embodiment, the fluid 486 flowing inside the pipe is filled between the cylinder 254 and the piston 241 to ensure the water tightness between the cylinder 254 and the piston 241. Therefore, it is not necessary to attach a watertight holding means such as an O-ring to the cylinder 254 or the piston 241, or it is not necessary to use a special lubricant, so that the structure of the suction control device 6 is simplified and the cleaning is performed. The property is improved. Further, the time and effort for cleaning and disinfecting the watertight holding means and the time and effort for applying the lubricant are eliminated.

Next, a ninth embodiment of the present invention will be described. FIG. 57 shows a sectional view of the second suction control device 479 used in this embodiment. The second cylinder 480 is provided concentrically with the cylinder 480.
A button cover portion 481 having a diameter larger than the outer diameter of 0 is provided, and the button cover portion 481 is provided with a second pin 483 for locking the second piston 482. The outer diameter of the push button portion 243 is smaller than the outer diameter of the button cover portion 481. Therefore, when the second piston 482 is pushed in, the push button portion 243 is
Moves inside the button cover portion 481. Also, FIG.
As shown in FIG. 8, a pin introduction groove 258, a pin insertion groove 259, and a transition groove 260 are provided on the outer surface of the push button portion 243, respectively. Pin 48
Insert 3 and use. As shown in FIG. 58B, the opening 252 as shown in the eighth embodiment is not provided on the upper surface of the push button portion 243.

Further, FIG. 59 shows a second suction tube 30 used in this embodiment. A tube bent portion 484 is provided at the end of the second suction tube 30. Inside the tube bending portion 484, a tapered conduit portion 272 having a second syringe tapered portion 299 is provided. In addition, the inside of the second suction tube 30 has a tapered conduit 272.
It is a straight conduit portion 273 that goes straight to. The inner surface of the taper conduit 272, the inner surface of the orthogonal conduit 273, and the joint between the two are smooth surfaces without steps. Further, the second ribs 269 are provided at three locations on the outer circumference of the tapered conduit 272 at intervals of 90 degrees. Further, a parallel flat surface portion 274, which is two surfaces parallel to each other, is provided by cutting out the outer circumference of the tapered pipe path 272.

Further, the end shape of the tube bent portion 484 of the second suction tube 30 may be a shape in which concave groove portions 485 are provided on both sides of a rectangular cross section as shown in FIG. In this case, the operation portion side surface 2 of the fixing hole portion 276
The cross-sectional shape on the 79 side is the third rib 28 as shown in FIG.
2 is provided at the center of the side wall portion 277.

When the cylinder 254 is fixed in the fixing hole portion 276, the concave groove portion 485 and the third rib 282 are fitted as shown in FIG. As a result, the elbow member 247 of the eighth embodiment is fitted into the outlet pipe line 255,
The same effect as when the cylinder 254 is attached to the operation unit is obtained.

The second cylinder 4 shown in this embodiment is also used.
Both 80 and the second piston 482 are made of only a hard resin such as polysulfone, modified PPO, polyester, polycarbonate, polyethylene, and fluororesin, and are not made of metal.

Incidentally, the suction control device may be the third suction control device 500 shown in FIG. In the third suction control device 500, the position of the inlet pipe line 256 and the position of the outlet pipe line 255 of the second suction control device 479 are reversed, and the outlet pipe line 255 has the second cylinder 480.
Inlet pipelines 256 are respectively provided on the upper side of the above. Further, the fifth piston 502 has a lower end opening 246.
Is not provided, but a lower side wall body 501 is provided instead. When the fifth piston 502 is not pushed in, the outlet pipe line 255 and the upper opening 245 communicate with each other, so that natural suction is performed. With this configuration,
It is possible to improve the degree of freedom of the piping of the suction tube attached to the operation unit.

As described above, in this embodiment, since the cylinder 480 and the piston 482 constituting the suction control device are formed of only resin, it is possible to supply a large amount of suction control device which is cheaper than the case of using metal. Therefore, the suction control device can be supplied as a disposable product. In addition, it is possible to integrally form a complicated shape, and it is possible to reduce the number of parts in which dirt easily remains and the connecting parts between the parts.

Next, a tenth embodiment of the present invention will be described. FIG. 64 shows the second elbow member 489 used in this embodiment. A locking protrusion 490 is provided on the second elbow member 489, and a locking pin 491 is provided at the tip of the locking protrusion 490. The second elbow member 489 is the same as the elbow member 70 shown in the eighth embodiment except for the engaging projection 490 and the engaging pin 491.
It has the same structure as.

FIG. 65 shows a third cylinder 492 used in this embodiment. On the outer periphery of the third cylinder 492, like the third cylinder 492 shown in the eighth embodiment, the pin introduction groove portion 258, the pin insertion groove portion 259, and the transition groove portion 260.
Is not provided. All other configurations are the same as those of the third cylinder 492.

FIG. 66 shows a third piston 487 attached to the suction control device 6 used in this embodiment. A second piston locking groove 488 is provided outside the push button portion 243 of the third piston 487. Therefore, the third piston 487 is not provided with the pin 249 and the rotation prevention column 248 unlike the piston 241 shown in the eighth embodiment. The configuration of the other parts of the third piston 487 is the same as that of the piston 241.

At the time of use, the spring 283 is fixed to the third position.
After housing the cylinder 492 in the fixing hole 276, the third piston 487 is inserted into the third cylinder 492. Further, the second elbow member 489 is connected to the outlet line 255. At this time, as shown in the eighth embodiment, the third cylinder 492 is fixed by the second elbow member 489 in the fixing hole portion 276 provided in the operation portion 2, and the locking pin 491 is locked by the locking groove. It is inserted in 488.

FIG. 67 shows the suction control device 6 in this embodiment.
Shows a state of being attached to the operation unit 2. Locking pin 49
Since the width of 1 is narrower than the width of the piston locking groove 488,
Piston 487 is locked in a slidable state with respect to the third cylinder 492.

By the way, in this embodiment, the outlet pipe 25
Although 5 is directly provided on the tubular portion 257 of the cylinder 254, the outlet pipe line 255 and the tubular portion 257 may be formed separately and attached. An example in that case is shown in FIGS. 68 and 69. As shown in (b) of FIG. 69, the outlet conduit 255 is provided with a mounting surface 496. In addition, the tubular portion 257 of the cylinder 254 is provided with a second mounting surface 497 for mounting the outlet conduit 255 as a surface recessed from the outer surface of the tubular portion 257. Joining the mounting surface 496 to the mounting surface 497 forms an outlet line 498. This may be applied not only to the outlet pipeline 255 but also to the inlet pipeline 256.

By the way, in this embodiment, the center line 499 of the outlet pipe line 255 passes through the cylinder center line 454. However, as shown in FIG. It may be provided at a position offset from the line 454. This is the inlet line 2
It may be applied to 56.

As described above, in this embodiment, since the piston 487 and the cylinder 492 are locked by the elbow member 489 and the piston 487 which are used when the suction control device is fixed to the operation portion, the cylinder 492 of the cylinder 492 is locked. There is no locking groove on the outer surface. Therefore, the cleanability of the cylinder 492 is improved, and as a result, the cleanability of the entire suction control device is improved. Moreover, it is sufficient to regulate only the sliding direction. The introduction groove is unnecessary and the shape is simple and easy to wash.

[0117]

As described above, according to the endoscope of the present invention, since the entire suction control device can be removed from the operating portion, the suction control device can be easily cleaned.

[Brief description of drawings]

FIG. 1 is a perspective view of an operation unit having a suction control device for an endoscope according to a first embodiment of the present invention.

2A is an overall configuration diagram of an endoscope showing a first embodiment of the present invention, and FIG. 2B is a schematic diagram of an apparatus main body to which the endoscope of FIG.

FIG. 3 is a plan view of an operation unit of the endoscope shown in FIG.

4 is a side view of an operation unit of the endoscope shown in FIG.

5 is a cross-sectional view of a suction control device provided in the operation unit of the endoscope of FIG. 1 and a mounting portion to which the suction control device is attached.

6 (a) is a front view of a piston constituting the suction control device of FIG. 5, and FIG. 6 (b) is a sectional view taken along the line AA of FIG.

7A is a cross-sectional view of the forceps plug, and FIG. 7B is a plan view of the forceps plug of FIG.

FIG. 8 is a schematic view showing a state in which the suction tube is fixed to the operation unit.

9A is a schematic view including a universal cord side showing a state in which a suction tube is fixed to an operating portion, FIG. 9B is a sectional view taken along line BB of FIG. 9A, and FIG. a) C-
Sectional drawing which follows the C line, (d) is sectional drawing which follows the DD line of (a).

FIG. 10 is a cross-sectional view of a suction control device provided in an operation portion of an endoscope and a mounting portion to which the suction control device is attached according to a second embodiment of the present invention.

FIG. 11 is a plan view of a main portion of an operating portion of an endoscope showing a second embodiment of the present invention.

FIG. 12 is a cross-sectional view of a suction control device provided in an operating portion of an endoscope and a mounting portion to which the suction control device is attached, showing a third embodiment of the present invention.

FIG. 13 is a plan view of the essential parts of the operating portion of the endoscope showing the third embodiment of the present invention.

FIG. 14 is a cross-sectional view of a forceps plug provided in an endoscope showing a third embodiment of the present invention.

FIG. 15 is a cross-sectional view of a suction control device provided in an operating portion of an endoscope and a mounting portion to which the suction control device is attached according to a fourth embodiment of the present invention.

FIG. 16 relates to an endoscope of a fourth embodiment of the present invention, (a) is a schematic diagram including a universal cord side showing a state in which a suction tube is fixed to an operating portion, and (b) is ( Sectional drawing which follows the EE line of a), (c) is F- of (a).
It is sectional drawing which follows the F line.

FIG. 17 is a plan view relating to the endoscope of the fourth embodiment of the present invention and showing a state in which the suction tube is fixed to the operating portion.

FIG. 18 is a cross-sectional view of a suction control device provided in an operating portion of an endoscope and a mounting portion to which the suction control device is attached, showing a fifth embodiment of the present invention.

FIG. 19 is a front view of a piston which constitutes the suction control device of FIG. 18.

FIG. 20 is a cross-sectional view of a forceps plug provided in an endoscope showing a fifth embodiment of the present invention.

FIG. 21 is a cross-sectional view of a suction control device provided in an operation portion of an endoscope and a mounting portion to which the suction control device is attached according to a sixth embodiment of the present invention.

FIG. 22 is a plan view of the essential parts of the operating portion of the endoscope showing the sixth embodiment of the present invention.

FIG. 23 is a sectional view of a forceps plug provided in an endoscope showing a sixth embodiment of the present invention.

FIG. 24 is a plan view of a main portion of an operating portion of an endoscope showing a seventh embodiment of the present invention.

FIG. 25 is a cross-sectional view of a suction control device provided on the operation unit of the endoscope of FIG. 24 and a mounting portion to which the suction control device is attached.

FIG. 26 is a cross-sectional view showing a state where the fixing plate is fitted into the fixing plate locking groove in a state where the suction control device is attached to the attachment portion of the operation portion of the endoscope of FIG. 24.

27 is a cross-sectional view taken along the line KK of FIG.

FIG. 28 is a configuration diagram of a suction conduit system of an endoscope according to an eighth embodiment of the present invention.

FIG. 29 is a side view of the operation unit of the endoscope.

FIG. 30 is a top view of the operation unit.

FIG. 31A is a side view of a piston attached to the suction control device used in the eighth embodiment, and FIG. 31B is a view taken in the direction of the arrow M in FIG.

32 (a) is a cross-sectional view of the piston of FIG. 31, (b).
3A is a view in the P direction arrow of FIG. 3A, and FIG.

33 is a top view of the piston of FIG. 31. FIG.

34 is a cross-sectional view taken along the line NN of FIG. 32.

FIG. 35 (a) is a top view of a cylinder attached to the suction control device used in the eighth embodiment, (b) is (a).
2 is a cross-sectional view taken along the line S-S of FIG. 3C, and FIG.

FIG. 36 is a side sectional view of the cylinder of FIG. 35.

FIG. 37 is a view taken in the direction of the arrow R in FIG.

38 is a side view of the upper end of the cylinder of FIG. 35.

FIG. 39 is an elbow member attached to the suction control device used in the eighth embodiment, (a) is a view in the T direction of (b), (b) is a side view of the elbow member, and (c). FIG. 4 is a side sectional view of an elbow member.

FIG. 40 (a) is a top view of the suction control device attachment portion of the endoscope operation portion of the eighth embodiment, and FIG. 40 (b) is a side view.

FIG. 41 is a schematic diagram of a piston sliding spring attached to the suction control device used in the eighth embodiment.

FIG. 42 is a view showing an assembling method of the suction control device of the eighth embodiment and a mounting method of the suction control device to the operating portion.

FIG. 43 is a transverse cross-sectional view when the piston is mounted on the cylinder.

FIG. 44 is a view showing a state in which a spring is fixed to the cylinder.

45 is a cross-sectional view showing a modified example of FIG. 43.

FIG. 46 is a diagram showing a modification of FIG. 44.

FIG. 47 is a diagram showing a state in which the pin is moved in the groove.

FIG. 48 is a cross-sectional view showing a state where the suction control device is mounted in the mounting portion of the operation portion.

FIG. 49 (a) is a view showing the arrangement of suction tubes,
(B) And (c) is sectional drawing which follows the UU line of (a).

FIG. 50 is a side view showing a state where the suction control device is attached to the operation unit.

FIG. 51 is a top view showing a state where the suction control device is attached to the operation unit.

FIG. 52 is a view showing a state where suction tubes are connected to each other by a connecting member.

FIG. 53 is a diagram showing a positional relationship between a push button portion of the suction control device and a push button portion of the air / water feeding valve.

54 (a) is a side view of the endoscope operation section showing a state in which the first suction tube fixed to the tube fixing groove is covered with a tube cover, FIG. 54 (b) is a WW of FIG. 54 (a).
It is sectional drawing which follows the line.

FIG. 55 (a) is a side view showing a modified example of the piston,
(B) is a FF direction arrow view of (a).

FIG. 56 is a side sectional view of the suction control device in an assembled state.

FIG. 57 is a side sectional view of a suction control device used in a ninth embodiment of the present invention.

58 (a) is a side view of the push button portion, and FIG. 58 (b) is a view in the Y direction of FIG. 58 (a).

FIG. 59 is a suction tube used in the ninth embodiment of the present invention, (a) is a view in the Z direction of (b), (b) is a side view of the suction tube, and (c) is suction. It is a sectional side view of a tube.

FIG. 60 is a view showing an end shape of a bent portion of a suction tube.

61A is a cross-sectional view of the mounting portion of the operation unit to which the suction control device is mounted, and FIG. 61B is a view taken in the direction AA of FIG.

FIG. 62 is a cross-sectional view showing a state where the suction control device is attached to the attachment portion of the operation portion.

FIG. 63 is a side sectional view showing a modified example of the suction control device.

64 is a second elbow member used in the tenth embodiment, FIG. 64 (a) is a view in the direction of arrow BB in (b), and FIG. 64 (b) is a side view of the second elbow member.

FIG. 65 is a perspective view of a cylinder used in the tenth embodiment.

FIG. 66 is a piston used in the tenth embodiment,
(A) is a CC direction arrow view of (b), (b) is a perspective view of a piston.

67 (a) is a view showing a state in which the suction control device is attached to the operation portion, and FIG. 67 (b) is a cross-sectional view taken along the line DD-DD in (a).

FIG. 68 is a cross-sectional view in the case where the outlet pipe line and the tubular portion are separated, and (a) is a cross-sectional view showing a state before attachment,
(B) is a cross-sectional view showing the mounted state, (c) is (b)
2 is a sectional view taken along line II-II of FIG.

69A is a view showing a mounting surface of a cylindrical portion of a cylinder, FIG. 69B is a view showing a mounting surface of an outlet pipe, and FIG.
Is a sectional view taken along line XX-XX in (a), and (d) is (b).
3 is a cross-sectional view taken along line YY-YY of FIG.

FIG. 70 is a transverse cross-sectional view when the piston is mounted on the cylinder.

FIG. 71 is a cross-sectional view showing a conventional example of a suction control device.

[Explanation of symbols]

6 ... Suction control device, 28, 30, 93 ... Suction tube,
50 ... Endoscope.

─────────────────────────────────────────────────── ───

[Procedure amendment]

[Submission date] May 26, 1994

[Procedure Amendment 1]

[Document name to be amended] Statement

[Correction target item name] 0026

[Correction method] Change

[Correction content]

As shown in FIG . 5, an air insertion passage 57 is provided on the side surface of the piston 41 from its central portion to its bottom portion. Further, a piston insertion groove 58 for inserting the piston 41 into the piston locking projection 52 of the cylinder 40 and a piston 41 connected to the piston insertion groove 58 are provided on the side surface of the piston 41 located on the side opposite to the air insertion passage 57. A piston locking groove 59 for locking the inside of the cylinder 40 is provided.

[Procedure Amendment 2]

[Document name to be amended] Statement

[Correction target item name] 0061

[Correction method] Change

[Correction content]

As shown in FIG. 24, in this embodiment, the cylinder fixing hole 121 of the operating portion 2 has a rectangular cross section. Further, cylinder fitting protrusions 122 having a rectangular cross section are provided on both side surfaces of the central portion of the cylinder fixing hole 121. The suction control device 6 used in this embodiment has the same conduit configuration as the suction control device 6 shown in the fifth embodiment. However, the cylinder 114 is the outer shape of the cross section
There is formed in a rectangular cross section on both sides thereof are cylinder fitting recess 123 of the rectangular is provided.

[Procedure 3]

[Document name to be amended] Statement

[Correction target item name] 0065

[Correction method] Change

[Correction content]

FIG. 28 shows the construction of the suction conduit system 469 in this embodiment. Inside the insertion part 1, a suction channel 470 having an opening on one side is provided in the distal end hard part 5. The opposite end of the suction channel 470 extends to the forceps port 26 and is open. A forceps plug 27 having a duct inside is attached to the forceps port 26, and a duct branching member 229 for branching the duct from the forceps plug 27 is provided.
It has been burned. Together with the first suction tube 28 is connected to the conduit component Kibe 229, the first suction tube 28 is connected to the inlet conduit 256 of the suction control device 6. Further, an outlet pipe line 255 is provided from the suction control device 6 to which the second suction tube 30 is connected. The second suction tube 30 is the suction tube fixing member 2
The third suction tube 36 is connected to the third suction tube 236 through the suction pump 47.
The suction conduit system 469 is configured by being connected to 1.

[Procedure amendment 4]

[Document name to be amended] Statement

[Correction target item name] 0067

[Correction method] Change

[Correction content]

FIG. 32 shows a vertical sectional view of the piston 241. The second sliding portion 472, which slides inside the cylinder of the tubular portion 242, has an outer periphery formed by a vertical cylindrical surface without taper. Further, the upper portion of the second sliding portion 472 is a second tapered portion 473 having a tapered shape that spreads upward. Inside the tubular portion 242, there is a taper conduit 244, which is a tapered conduit, an upper opening 245 at the upper end side surface of the tapered conduit 244, and a lower end opening 2 at the lower end.
47 , a lower end side surface opening 246 is provided on the lower end side surface. When viewed from the front, the upper opening 245 has a shape in which a rectangle and a semicircle having the long side of the rectangle as a diameter are combined as shown in FIG. Therefore, it has a larger area than a circle of the same diameter.

[Procedure Amendment 5]

[Document name to be amended] Statement

[Correction target item name] 0068

[Correction method] Change

[Correction content]

In this embodiment, the upper opening 245 and the lower opening
The end side opening 246 is provided at a position forming an angle of 125 degrees in the horizontal plane as shown in FIG.
Further, a first chamfered portion 253 is provided at the lower end of the tubular portion 242 over the entire circumference. A rib 250 is provided inside the push button portion 243. In addition, the inside of the push button portion 243 has a tapered shape that widens from the upper side to the lower side. FIG. 34 shows a cross-sectional view of the piston 241. In this embodiment, as shown in FIG. 34, the ribs 250 are provided at three locations on the circumference at equal intervals, but the number is not limited to three, and more or less ribs may be provided. In addition, a lightening portion 451 formed by removing the inside of the tubular portion is provided on the upper portion of the tubular portion 242. Also, a second hole 452 is provided at a position facing the lightening portion 451 of the push button portion 242.

[Procedure correction 6]

[Document name to be amended] Statement

[Name of item to be corrected] 0070

[Correction method] Change

[Correction content]

The cylinder 25 attached to the suction control device 6 used in this embodiment is shown in FIGS. 35 (a) and 35 (c).
4 is shown. Cylinder 254 is polysulfone, Noryl,
It is formed of a hard resin such as modified PPO, polyester, polycarbonate, polyethylene, or fluororesin, or a metal such as stainless steel, brass, or aluminum. FIG. 35 (a) is a view of the cylinder 254 seen from the upper surface, and FIG. 35 (c) is a view of the cylinder 254 seen from the side. The cylinder 254, the second cylindrical portion 257 having a cylindrical cross-section is provided, the second cylindrical
An outlet pipe line 255 and an inlet pipe line 256 are provided on the side surface of the portion 257.
Is provided. Outlet pipeline 255 and inlet pipeline 256
Forms an angle of 125 degrees on the plane as shown in FIG. In this embodiment, this angle is 125 degrees, but other angles may be used. Also, FIG.
As shown in FIG. 5 (c), the outlet line 255 and the inlet line 25
6 is provided at a position shifted in the vertical direction.

[Procedure Amendment 7]

[Document name to be amended] Statement

[Correction target item name] 0078

[Correction method] Change

[Correction content]

FIG. 40A shows a top view of the operating section 2 used in this embodiment, and FIG. 40B shows a side view of the operating section 2. A fixing hole portion 276 for attaching the suction control device 6 is provided between the air / water feeding valve 7 and the remote switch 8 provided in the operation portion 2. Fixing hole 2
Reference numeral 76 is composed of a side wall portion 277 composed of two surfaces parallel to each other and a curved wall surface 278 which is a surface having a semicircular horizontal cross-sectional shape connecting the side wall portions 277. Also, the curved wall 2
At a position facing 78, a side opening 280 that opens to a side surface 279 of the operation portion 2 that is a side surface of the operation portion 2 is provided, and an upper opening 281 is provided at the upper surface of the operation portion. Side wall 27
No. 3 on the side of the operation portion side surface 279 of No. 7 protruding from the side wall portion
Ribs 282 are provided. Between the third rib 282
Is the narrow fixing hole 291 which is narrower than the fixing hole 276.
ing. The fixing hole portion 276 is also provided in a direction orthogonal to the long axis direction of the operation portion 2.

[Procedure Amendment 8]

[Document name to be amended] Statement

[Correction target item name] 0086

[Correction method] Change

[Correction content]

The second suction tube 30 is connected to the elbow member 270 connected to the outlet conduit 255.
The second suction tube 230 is guided downward through the upper portion of the universal cord connection portion 238 provided so as to project on the casing cover 271b provided in the operation portion 2.
In the present embodiment, the upper section of the universal cord connecting portion 238 has a shape without a recess as shown in FIG. 49 (b), but a recess 238a is provided as shown in FIG. 49 (c). Through the second suction tube 30
I don't know. When the suction tube is passed through the recess 238a, the operability of the operation unit 2 is improved because the portion where the second suction tube 30 projects above the operation unit 2 is reduced.

[Procedure Amendment 9]

[Document name to be amended] Statement

[Correction target item name] 0091

[Correction method] Change

[Correction content]

A cross section of the suction valve in this state is shown in FIG. FIG. 56B shows a state where the piston 241 is pushed in. By pushing the piston 241, the inlet pipe line 256, the upper opening 245, the taper pipe line 2
44, the lower end side opening 246 , and the outlet opening 255 communicate with each other to perform a suction operation. When the piston 241 is pushed downward to the maximum extent, the end of the push button portion 243 and the flange 264 come into contact with each other to act as a stopper for the piston. At this time, the spring 2 is compared with the height of the spring storage portion 459.
Since the height of 83 is high, the wires of the spring 283 do not come into close contact with each other, so that there is no concern that the wires of the spring 283 will come into contact with each other during operation to generate noise.

[Procedure Amendment 10]

[Document name to be corrected] Drawing

[Correction target item name] Figure 9

[Correction method] Change

[Correction content]

[Figure 9]

[Procedure Amendment 11]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 30

[Correction method] Change

[Correction content]

FIG. 30

[Procedure Amendment 12]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 35

[Correction method] Change

[Correction content]

FIG. 35

[Procedure Amendment 13]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 36

[Correction method] Change

[Correction content]

FIG. 36

[Procedure Amendment 14]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 37

[Correction method] Change

[Correction content]

FIG. 37

[Procedure Amendment 15]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 42

[Correction method] Change

[Correction content]

FIG. 42

[Procedure Amendment 16]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 43

[Correction method] Change

[Correction content]

FIG. 43

[Procedure Amendment 17]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 49

[Correction method] Change

[Correction content]

FIG. 49

[Procedure 18]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 53

[Correction method] Change

[Correction content]

FIG. 53

[Procedure Amendment 19]

[Document name to be corrected] Drawing

[Correction target item name] Fig. 54

[Correction method] Change

[Correction content]

FIG. 54

[Procedure amendment 20]

[Document name to be corrected] Drawing

[Name of item to be corrected] Fig. 70

[Correction method] Change

[Correction content]

FIG. 70

 ─────────────────────────────────────────────────── ─── Continuation of the front page (72) Inventor Hisao Yabe 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside Olympus Optical Co., Ltd. (72) Inventor Takayuki Yokota 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (72) Inventor Satoshi Nakagawa Nishi 43-2, Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd.

Claims (1)

[Claims] 1. A cylinder having a pair of connection ports to which an upstream pipe part and a downstream pipe part of the suction pipe line are respectively connected,
And a piston forming a passage for communicating the pair of connection ports with each other, and the piston is fitted into the cylinder to control the communication state of the pair of connection ports to suck the suction pipe line. An endoscope including a suction control device for controlling an operation, wherein the suction control device is detachably attached to an endoscope operation section.