JPH0732762B2 - Endoscope - Google Patents

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope in which a forceps channel and a suction tube are connected to a forceps insertion port.

[0002]

2. Description of the Related Art Generally, a forceps insertion port of an endoscope is formed by projecting the forceps insertion port at a connecting portion that connects an operating portion and an insertion portion, as disclosed in, for example, Japanese Patent Laid-Open No. 60-234649. A branch pipe that is formed and directly connected to the forceps channel and a suction pipe is provided directly below the forceps insertion port, and the branch pipe is further extended from the inside of the connecting portion to the inside of the projecting portion where the forceps insertion port is formed. It was housed and was connected to the forceps insertion port for communication.

[0003]

As described above, in the conventional endoscope, the branch pipe is accommodated from the inside of the connecting portion to the projecting portion of the forceps insertion port.

Therefore, in the final assembly step of this portion, when the exterior cover for exteriorly connecting the connecting portion is mounted, the branch pipe is moved sufficiently inward so that the branch pipe does not interfere with the exterior cover. Had to let.

However, the connecting portion is a narrow portion, and if the branch pipe is moved inwardly in the narrow connecting portion, other built-in objects such as optical fiber bundles and other tubes are pinched and damaged. On the other hand, in the case of a device having a plurality of forceps channels, it is difficult and troublesome to move the branch pipe inward in a space, and the assembling property thereof becomes extremely difficult.

The present invention has been made in view of the above-mentioned problems, and an object thereof is to provide a forceps channel and a suction via a branch pipe to a forceps insertion port in a connecting portion which connects an operation portion exterior and an insertion portion. An object of the present invention is to provide an endoscope which can be easily assembled by connecting pipes without damaging other internal components.

[0007]

SUMMARY OF THE INVENTION The endoscope of the present invention has an insertion
Operation unit main body having a connection unit for connecting the units, and the operation unit
Move on the outer circumference of the main unit
The exterior cover to be installed on the
Forceps insertion port that is provided so as to project in one direction and through which a treatment tool is inserted
And inserting the forceps in the internal space of the exterior cover.
It is arranged within a range that does not enter the inside of the entrance,
Also use the forceps insertion port and the forceps channel tube.
It has a connecting part for each connection and is fixed to the operation part body
And a joint. Then, the forceps insertion opening
Assembling the outer cover having the forceps insertion opening and forceps
Moving the joint that connects with the tube for the child channel
No, it can be easily assembled.

[0008]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENT An embodiment of the present invention will be described below with reference to FIGS.
I will explain based on. FIG. 1 schematically shows the entire endoscope. This endoscope includes an insertion portion 1, an operation portion 2, and a light guide cable 3.
The operation unit 2 is an operation unit body (base) 4 as shown in FIG.
And a casing 5 as an outer cover made of a synthetic resin material that covers and encloses it. Further, the casing 5 has a two-part construction of a hollow box-shaped casing body 6 and a tubular grip cover 7, which are joined so that the hollow portions communicate with each other.

The casing body 6 has an eyepiece portion 8, an air / water feeding control member 9, a suction control member 11 and a bending operation knob 1.
Two are provided. It should be noted that in FIG. 1, 10a is an intermediate joint portion of an air / water feeding tube, and 10b and 10b are intermediate joint portions of a suction tube 54 described later. All of these intermediate coupling portions 10a, 10b, 10b are arranged in the grip cover 7. Further, an inclined surface 13 is formed on a portion of the casing main body 6 opposite to the bending operation knob 12, and the inclined surface 13 is provided with an opening portion 14 facing the operation portion main body 4. . A casing lid 15 made of a synthetic resin material is attached to the opening 14 so as to be closed. Then, the base end of the light guide cable 3 is connected to the casing lid 15.

Therefore, the fixing structure of the casing lid 15 to the casing body 6 and the connection structure of the light guide cable 3 to the operation portion body 4 will be described in detail with reference to FIGS. 4 and 5. A fixing metal fitting 17 is provided on the plate surface of the operation portion main body 4 facing the opening portion 14. The fixing bracket 17 is formed by pressing a thin metal plate, and is composed of a top plate portion 18 and three support leg portions 19 that are bent integrally with the top plate portion 18. . Further, a bent portion 19a is formed at the lower end of each of the support legs 19 ... And a mounting hole 19b into which the fixing screw 20 is loosely inserted via a spring washer 20a is formed in each bent portion 19a. . The fixing bracket 17 is fixed to the operation section body 4 by the fixing screws 20. Therefore, the top plate portion 1 of the fixing bracket 17
8 and the upper portions of the support leg portions 19 are projected from the opening portion 14 of the casing body 6, and the protruding top plate portion 18 and the support leg portions 19 and 19 are provided with mounting holes 21. The base end of the light guide cable 3 is connected to the fixing bracket 17. That is, the light guide cable 3 is the light guide fiber f,
The flexible pipe 22 for mounting the fluid transport pipe t and the long member such as the electric signal line (1) and the cap pipe 23 fitted to the end of the flexible pipe 22. A notch 24 is provided at the base end portion, and the notch 24 has a screw hole 25 that faces the mounting hole 21 of the fixing bracket 17.
Has been drilled. Then, the fixing screws 26 that penetrate the mounting holes 21 are screwed into the screw holes 25 so that they are integrally fixed. Further, a bending prevention rubber tube 27 is fitted to the base end of the flexible tube 22,
A base 28 is screwed and adhered to the open end.

A base end portion of a tightening ring 29 is screwed and fixed to the mouthpiece 28 by adhesion. The tightening ring 29 projects from the end surface of the anti-bending rubber tube 27, and a first annular groove 30 is provided on the inner peripheral surface of the protruding portion and a second annular groove 31 is provided on the outer peripheral surface. . The first and second annular grooves 30 and 31 are adjacent to each other in the axial direction of the tightening ring 29, and the first and second annular grooves 30 and 3 are provided.
The elastic seal members 32 and 33, which are O-rings, are housed in the apparatus 1. Furthermore, the first and second annular grooves 30, 31
A step portion 34 is provided on the outer peripheral surface between the two, and an internal thread portion 35 is engraved on the inner peripheral surface corresponding to the second annular groove 31. The female screw portion 35 is screwed onto the male screw portion 36 formed on the outer peripheral surface of the protection tube 23. A fastening annular portion 37 having a wedge-shaped cross section is integrally provided on the base end surface of the fastening ring 29 so as to engage with the casing lid 15.

Further, the inclined surface 1 of the casing body 6
The opening 14 provided in the opening 3 has a rectangular shape, and an inclined pressure receiving portion 38 is provided on the inner peripheral edge of the opening 14. The casing lid 15 has a rectangular shape so as to close the opening 14, and an inclined pressing portion 39 that is joined to the inclined pressure receiving portion 38 is provided on the outer peripheral edge thereof. Further, a protrusion 40 is provided inside the inclined pressing portion 39 along the outer peripheral edge thereof, and the outside of the protrusion 40 is watertightly sealed between the protrusion 40 and the inner peripheral surface of the casing body 6. An elastic seal member 41 made of an O-ring is fitted.

On the outer surface of the casing lid 15, a square tube-shaped fitting tube 42 is integrally projected, and is fitted to the fixing metal fitting 17. A circular penetrating portion 43 fitted to the outer periphery of the tightening ring 29 is provided at the tip of the fitting cylinder 42.
Is provided, and a fitting step portion 44 that faces the step portion 34 of the tightening ring 29 is formed at the opening end. Further, an inner circumferential projection 45 is provided on a portion of the inner circumferential surface of the fitting cylinder 42 that faces a part of the tightening annular portion 37. The inner peripheral projection 45 is formed with a engagement notch 46 that engages with the tightening annular portion 37.

Next, an assembling method for connecting the light guide cable 3 to the operation portion main body 4 fixed in the casing 5 will be described. The fixing metal fitting 17 is inserted from the opening 14 of the casing body 6, and its supporting leg portions 19 are fixed to the operation portion body 4 by fixing screws 20.
In this case, the mounting hole 19b of each support leg portion 19 has the fixing screw 2
Since it is formed from a large-diameter hole into which 0 is loosely inserted, the fixing bracket 17 can be adjustably fixed to the operation section body 4 at a unique position. Next, the base end portion of the cap tube 23 provided on the flexible tube 22 of the light guide cable 3 is positioned on the top plate portion 18 of the fixing bracket 17, and the cap tube 2 is fixed by the fixing screws 26.
3 and the fixing bracket 17 are integrally fixed. Also in this case, since the fixing member 17 is formed of a thin metal plate, the positioning of the mouthpiece pipe 23 can be adjusted by plastically deforming it, and the casing lid 1 to be attached later.
5 can be positioned with the fitting cylinder 42. On the other hand, after the elastic seal member 41 is fitted to the ridge 40 of the casing lid 15, the fitting tube 42 of the casing lid 15 is fitted to the flexible tube 22 of the light guide cable 3.

Then, the casing lid 15 is moved in the direction of the casing body 6, and the fitting metal fitting 42 is contained in the fitting barrel 42, and at the same time, the casing lid 15 is moved.
Of the inclined pressure receiving portion 38 of the casing body 6
And the opening 14 is closed. Next, the tightening ring 29 having the elastic seal members 32 and 33 attached thereto and the bend preventing rubber tube 27 integrally bonded thereto are fitted into the flexible tube 22 of the light guide cable 3, and the male screw thereof is attached. Part 3
The female thread portion 35 of the tightening ring 29 is screwed onto 6 and tightened. In this case, since the shaft center 15a of the light guide cable 3 and the shaft center 42a of the fitting tube 42 are eccentric by α, the elastic seal member 33 is tightened by the tightening ring 29.
A force is applied in the direction perpendicular to a, that is, in the direction of arrow a. Further, since the tightening annular portion 37 of the tightening ring 29 is engaged with the engaging cutout portion 46 of the inner peripheral projection 45 of the fitting cylinder 42,
By tightening the tightening ring 29, a force is applied to the inner peripheral projection 45 in the direction of arrow P. Therefore, the casing lid 15 and the casing body 6 are intimately joined to the inclined pressure receiving portion 38 by the inclined pressing portion 39.

Although the elastic seal member 33 is biased by the tightening of the tightening ring 29, the seal is ensured even if it is biased by the maximum amount allowing the clearance between the tightening ring 29 and the casing lid 15. The tightening ring 29 and the casing lid 15 are completely watertightly sealed by the elastic sealing member 33, and the casing body 6 and the casing lid 15 are watertightly sealed by the elastic sealing member 41.

On the other hand, the grip cover 7 constitutes a connecting portion for connecting the casing body 6 as the exterior of the operating portion and the insertion portion 1. As shown in FIGS. 6 and 7, a forceps insertion port is formed so as to project on the side surface of the end portion on the insertion portion 1 side. That is, the mounting cylinder portion 48 for mounting the channel mouth 47 is formed integrally with the grip cover 7. That is, the channel mouth 47 is fitted into the mounting cylinder 48 so as to be freely inserted and removed from the outside, and is fixed by a pair of mounting screws 51, 51 as shown in FIG. Further, as shown in FIG. 7, the channel mouth 47 is connected to one end of a three-way pipe joint 52 that functions as a branch pipe. A forceps channel tube 53 is connected to the other one end of the three-way pipe joint 52, and a suction tube (suction tube) 54 is connected to the other end. This portion serves as the intermediate joint portion 10b that connects the channel tube 53 and the suction tube 54 to the three-way pipe joint 52, respectively. Then,
Immediately below the forceps insertion port formed in a protruding manner at a connecting portion that connects the casing body 6 of the operation unit and the insertion unit 1, the forceps channel is connected to the forceps channel tube 53 and the suction tube 54. A three-way pipe joint 52 as a branched pipe that has been branched is accommodated. The three-way pipe joint 52 as the branch pipe is configured so as not to enter the protrusion formed with the forceps insertion port.

Therefore, when assembling this connecting portion, the three-way pipe joint 52 as a branch pipe can be fixed to the tubular body 58 which will be described later. Then, after that, the mounting cylinder portion 48 is inserted from the insertion portion 1. At this time, the inner surface of the mounting cylinder portion 48 can be inserted without hitting the three-way pipe joint 52. Then, the mounting cylinder portion 48 is fixed by a nut-shaped tightening member 71 described later, and the watertight cover 66 and the break stop 65 are sequentially connected.

By the way, as shown in FIG. 2, the operation portion main body 4 inserted and arranged in the casing 5 has a plurality of members, that is, in this embodiment, a metal base plate 56, a pair of frames 57, and a pair of frames 57, respectively. It is composed of a cylinder 58. More specifically, a pair of bent piece portions 59, 59 are formed at the end of the main plate 56 on the insertion portion 1 side, and one end of each of the pair of frames 57, 57 is attached to each bent piece portion 59, 59. The frames 57 and 5 are connected together with screws.
The other end of 7 is screwed to the side surface of the cylinder 58.
The base plate 56 is arranged over the casing body 6 and the grip cover 7, the frames 57, 57 are arranged in the grip cover 7, and the cylindrical body 58 is arranged so as to extend from the tip opening portion of the grip cover 7 and protrude. It

Then, as shown in FIG. 7, the three-way pipe joint 52 is attached and fixed to the cylindrical body 58 by set screws 61, 61. Further, the base end 62 of the flexible tube of the insertion portion 1 is connected to the extending distal end of the tubular body 58 by a stop ring 63. Further, a break stop 65 made of a relatively hard elastic material is connected to the cylindrical body 58 via a connecting pipe 64.
A tubular watertight cover 66 is fitted on the outer periphery of the tubular body 58, and one end of the watertight cover 66 partially enters the opening end of the grip cover 7 and is watertightly connected. The other end of the watertight cover 66 is joined to the end surface of the break stop 65. A ring is provided between the joint between the watertight cover 66 and the gripping cover 7, between the joints between the watertight cover 66 and the cylinder 58 on the insertion section 1 side, and between the cylinder 58 and the base end of the insertion section 1. -Like elastic packings 67 are interposed to ensure watertightness between them.

Further, as shown in FIG. 7, the inner peripheral surface of the opening of the grip cover 7 on the side of the insertion portion 1 is a receiving portion 68 formed of an annular protrusion protruding in the central direction over the entire circumference thereof.
Are formed. Then, nut-shaped tightening members 71, 71 screwed onto the male screw 69 formed on the peripheral surface of the cylindrical body 58 come into contact with the receiving portion 68, and the tightening members 71, 71.
By moving the grip cover 7 to the grip cover 7 side.
Can be pressed, and as its reaction, the operation section body 4
Can be pulled.

On the other hand, the other end of the operation portion main body 4, that is, the end on the eyepiece 8 side of the main plate 56 is a pair of members, for example, the metal body 7.
2, 73 are used to attach and fix to the side wall 74 of the casing body 6. That is, the side wall 74 is sandwiched by a pair of metal bodies 72, 73, and a set screw 75 penetrating these three members.
And nuts 76 and so on.

The metal body 72 on the inner side has pieces 77, 77 formed on one side thereof screwed to the base plate 56.
Further, as shown in FIG. 9, the parts of the eyepiece 8 are assembled to the outer metal body 73 by utilizing this.

Further, the casing body 6 of the casing 5
The grip cover 7 and the grip cover 7 are connected as shown in FIG.
That is, the casing main body 6 is formed with a protrusion 79 protruding from the joining end surface 78 toward the grip cover 7 side and corresponding to the opening shape of the grip cover 7, and the protrusion 79 is fitted into the open end of the grip cover 7. It is like this. Further, the inner peripheral portion of the opening of the grip cover 7 into which the protrusion 79 is fitted has a large diameter corresponding to the thickness of the protrusion 79 to form a step portion 80. A projecting portion 80a that projects toward the casing body 6 is formed at the tip of the rising wall of the stepped portion 80, and a projecting portion 79a is also formed at the tip of the projection 79 correspondingly. And each protrusion 79a, 80
In the a, the bottom surface side of the stepped portion 80 is formed as an inclined surface, and the ring-shaped elastic packing 81 is fitted into the space portion surrounded by these.

On the other hand, a bending operation mechanism is attached to the base plate 56 of the operation section body 4 as shown in FIG. That is, a fixing portion 82a of the shaft 82 is provided on the upper surface of one end side of the main plate 56 located inside the casing body 6, and the shaft 82 is provided so as to project.
3 and the outer sleeve 84 are rotatably fitted.
One end of each sleeve 83, 84 engages with a pair of sprockets 85, 85 (only one shown in the figure) rotatably provided vertically on the shaft 82, and the other end of the sleeve 83, 84 The bending operation knob 12, which protrudes,
12 (only one shown).

A partition member 86 having a U-shaped cross section is formed on the upper surface of the base plate 56 projecting into the grip cover 7 along the longitudinal direction of the substrate 56 by a pressing plate 87 via an intermediate side thereof. Installed and fixed. Then, on the outer sides of both sides of the partition member 86, partitions 89 are formed to divide the passages 89 into upper and lower two stages. The partition wall 88 ...
Is divided into an inner partition wall 88a and an outer partition wall 88b in the width direction of the passages 89 ...
8b is a first and second support portion 90a having a midway portion in the longitudinal direction and an end portion on the sprocket 85 side erected on the substrate 56.
It is supported and fixed to 90.

A mounting plate 91 is erected on the end surface of the partition wall member 86 on the side opposite to the sprocket 85.
A flat plate-shaped holding member 92 having a width dimension larger than that of the partition member 86 is joined and fixed to 1. Two notches 93 are formed at both ends in the width direction of the holding member 92 so as to correspond to the passages 89. The notch 93 is provided with a hollow cylindrical restricting member 94 having a stepped portion 95a having a small diameter formed at an axially intermediate portion in a state in which the axial movement is restricted by engaging the stepped portion 94a. There is. This regulation member 9
4 is provided with the notch 9 by the end of the outer partition wall 88b.
It is held so that it does not come off from 3.

Further, a flexible wire guide pipe 95 made of a tightly wound coil or the like inserted over the entire length of the insertion portion 1 is fitted into the regulating member 94 at its base end portion and brazed and fixed by a brazing material 96a. Has been done. A wire 96 is inserted through the wire guide pipe 95. The tip of the wire 96 is connected and fixed to a top (not shown) forming the curved portion, and the base end side is guided to the passage 89. A connecting member 97 is connected to the base end of the wire 96 guided to the passage 89, and the end of a chain 98 whose middle portion is engaged with the sprocket 85 is connected to the connecting member 97. A collision member 99 is implanted in the connecting member 97 in a state orthogonal to the axis of the wire 96. A part of the collision member 99 projects toward the outer side in the width direction of the main plate 56, and the outer peripheral surface of this projecting portion is formed as a slope 100 forming an acute angle with the end surface thereof.

On the other hand, between the first support portion 90a and the second support portion 90 which are erected on the base plate 56, a wall portion in which a part of the base plate 56 or another member is bent and formed in an L shape. 101 is provided. A support hole 102 is formed on one side of the wall portion 101 along the width direction of the main plate 56.
A screw 103 having a receiving portion 103c between the screw portion 103a and the head portion 103b is rotatably supported by the screw 2 via the receiving portion 103c. That is, this screw 1
03 has its axis parallel to the axis of the wire 96 and
It is provided so as to be positioned on the outer side in the width direction of the main plate 56 with respect to the axis of 6, and the end of the screw portion 103a is engaged with the support hole 104 formed in the second support portion 90. This screw 103
A stopper 105 is screwed to the screw portion 103a of the. Since the height of the stopper 105 is formed slightly smaller than the height of the passage 89, when the screw 103 is rotated, the stopper 105 does not rotate but moves forward and backward in the passage 89. There is.

The passage 89 in the portion where the screw 103 is provided is defined by the outer partition wall 88b. On one side of the stopper 105 facing the partition member 86 side, a slope 106 having an angle corresponding to the slope 100 of the collision member 99 is formed.
The slope 40 of the collision member 99 collides with the slope 106 of No. 5 so that the wire 96 travels, that is, the maximum bending angle in the vertical and horizontal directions of the bending portion is regulated.

On the other hand, the head portion 103b of the screw 103 is provided with an engagement hole 107 penetrating in the radial direction thereof. The engaging hole 107 is provided with a locking spring 108 formed by bending a wire material in a wave shape with one end engaged. The other end of the locking spring 108 is pressed against the first supporting portion 90a in a compressed state. Therefore, the rotation of the screw 103 is restricted by the locking spring 108, and the end face of the head 103b is pressed against the side surface of the wall 101 by the restoring force of the locking spring 108 so that the screw 103 does not move out of the support hole 102. It is regulated.

In the bending operation mechanism thus constructed, the sprocket 85 is rotated by the bending operation knob 12 in order to bend the bending portion of the insertion portion 1, and the chain 9 is rotated.
When traveling 8, the wire 96 on the one passage 89 side in the width direction of the main plate 56 is towed, and the wire 96 on the other passage 89 side is pushed. Therefore, the bending portion is bent in the direction of the towed wire 96. Then, when the wire 96 is further towed, the slope 100 of the collision member 99 provided on the connecting member 97 connecting the base end of the wire 96 and the chain 98 collides with the slope 106 of the stopper 105. Can no longer be towed. That is, the maximum bending angle of the bending portion is restricted by the stopper 105. Further, when the collision member 99 collides with the stopper 105, the screw 103 is pressed toward the second support portion 90 side via the stopper 105. However, since the end face of the head 103b of the screw 103 abuts on the side face of the wall 101 and this abutment prevents the stopper 105 from being displaced axially in the axial direction, the maximum bending angle of the bending portion is the first. There is no danger of becoming larger than the set angle.

On the other hand, in order to change the maximum bending angle of the bending portion, the locking spring 1 provided in a compressed state between the first supporting portion 90a and the engaging hole 107 of the head 103b of the screw 103.
08 is removed by further compression. Next, the screw 103 is rotated to move the stopper 105 to the second support portion 9
After shifting to the 0 side, the bending operation knob 12 is rotated to bend the bending portion until a predetermined bending angle is reached. In this state, the bending operation knob 12 is fixed, and the stopper 1
The screw 103 is rotated in the opposite direction to the above until the slope 106 of 05 abuts the slope 100 of the collision member 99. Then, the first support portion 90a and the head portion 103b of the screw 103
If the locking spring 108 is provided again between the engaging hole 107 and the engaging hole 107, the stopper 105 is fixed at a predetermined position via the screw 103, and thus the stopper 105 sets the maximum bending angle of the bending portion. Will be done.

In order to engage the end portion of the locking spring 108 with the engagement hole 107, it is necessary to rotate the screw 108 slightly from a predetermined position.
If the pitch of 3 is made sufficiently small, the stopper 105 hardly moves by the slight rotation of the screw 103, so that the maximum bending angle of the bending portion is not affected.

By the way, each of the first supporting portions 90, 90
As shown in FIGS. 10 and 12, deflection preventing stopper members 111 and 112 are attached to the protruding tips of the above. Each of the deflection preventing stoppers 111 and 11
2 are both made of a synthetic resin material,
It is attached by being screwed into the screw holes 104 formed in 0 and 90. The deflection preventing stopper members 111 and 112 are in contact with the inner wall surface of the casing 5, in this embodiment, the inner wall surface of the casing body 6. Further, as shown in FIG. 3, the deflection preventing stopper member 1
A stopper piece 113, which is another deflection preventing stopper member, is fixed to the main plate 56 on the side opposite to the sides 11 and 112 by screwing.
As shown by 2, the inner wall surface of the casing body 6 (the inner wall surface on the side opposite to the inner wall surface on the contact side of the deflection preventing stopper members 111, 112) is abutted.

The deflection preventing stopper member 11
1, 112 and the stopper piece 113 are substantially (substantially) on a plane orthogonal to the plate surface of the main plate 56 as shown in FIG.
It is desirable to be arranged. That is, for example, the bending prevention stopper members 111 and 112 and the stopper piece 11 are provided on the side where the operation portion main body 4 bends and bulges during a bending operation.
Since 3 is always provided so as to abut the inner wall of the casing body 6, even if the operation portion body 4, especially the main plate 56 bends during bending operation, this is prevented. As a matter of course, this deflection can be prevented by the pulling force acting on the operation portion body 4 as described later, but it can be completely prevented by the stopper members 111, 112 and the stopper piece 113. Then, this also brings about an effect that the operation portion main body 4 can be made thinner and more compact. However, the stopper members 111 and 112 and the stopper piece 11
No. 3 applies only a very slight stress to the casing body 6 due to contact, and no unnecessary concentrated stress is applied. In addition, the stopper members 111 and 112 and the stopper piece 113 for preventing bending with respect to the inner wall of the casing body 6 are provided.
Need not always be in intimate contact with each other, but may be provided with a distance such that they are in contact with each other when the operation portion main body 4 is slightly bent.

In the assembly structure of the operating portion 2, the hollow box-shaped casing body 6 and the tubular grip cover 7 are joined to form the tubular casing 5 as a whole, and the inside of the casing 5 is formed. The operating portion main body 4 is inserted and disposed in the operating portion main body 4, and both ends of the casing 5 are supported by the operating portion main body 4 so as to apply a tensile force to the operating portion main body 4. That is, the end portion of the operation section body 4 on the eyepiece 8 side uses the pair of metal bodies 72, 73 to make the casing body 6
It is attached and fixed to the side wall 74 of the. The cylindrical body 58 at the end of the operation portion main body 4 on the insertion portion 1 side grips the tightening member 71.
The operating portion main body 4 receives a tensile force, while the casing 5 receives a compressive force as its reaction. And the casing body 6
The elastic packing 81 interposed between the grip cover 7 and the grip cover 7 is compressed to ensure water tightness.

[0038]

As described above, according to the present invention, the insertion portion is
Operation unit main body having a connecting portion to be connected, and this operation unit main body
Move on the outer circumference of the
The exterior cover to be attached and the exterior cover to the outside
A forceps insertion opening that is provided so as to project and through which a treatment tool is inserted,
The forceps insertion opening in the internal space of the exterior cover.
Is arranged within a range that does not get inside of
Connect the forceps insertion port and the forceps channel tube respectively.
And a joint fixed to the operation section body having a continuous connection section
It is equipped with. Therefore, the assembly of the connecting part
There is no need to move the joint when performing
You can attach the cover with the joint fixed to
So you can move the fittings to build in other bundles such as optical fiber bundles
There is no risk of damaging objects, and the space in the internal space
Even if there is not enough space, it is possible to easily assemble.

[Brief description of drawings]

FIG. 1 is a schematic perspective view of an endoscope.

FIG. 2 is a perspective view of an operation unit main body.

FIG. 3 is a perspective view of the operation unit main body viewed from the opposite back side.

FIG. 4 is a cross-sectional view of a connection structure portion of a light guide cable with respect to an operation unit.

5 is a cross-sectional view taken along the line VV in FIG.

FIG. 6 is a sectional view showing a portion of a channel mouth.

FIG. 7 is a cross-sectional view of a connecting portion between the operating portion and the insertion portion.

FIG. 8 is a cross-sectional view of an operation unit.

FIG. 9 is a cross-sectional view of the internal mechanism of the operation unit.

FIG. 10 is a side sectional view of the same.

FIG. 11 is a cross-sectional view of a connecting portion between an operating portion and an eyepiece portion.

FIG. 12 is a cross-sectional view of the casing.

[Explanation of symbols]

DESCRIPTION OF SYMBOLS 1 ... Insertion part, 2 ... Operation part, 4 ... Operation part main body, 5 ... Casing, 6 ... Casing main body, 7 ... Gripping cover, 48 ... Attachment cylinder part, 52 ... Three-way pipe joint (branch pipe), 53 ... Forceps Channel tube, 54 ... Suction tube.

Claims (1)

[Claims] 1. An operating section book having a connecting portion for connecting an inserting portion.
Move the body and the outer circumference of this operation unit body to move the operation unit
An exterior cover to be attached at a predetermined position on the outer circumference of the body, and
The treatment tool is inserted through the exterior cover so that it protrudes outward.
The forceps insertion opening and the interior space of the exterior cover.
The forceps insertion opening so that it does not go inside.
Placed at least for the forceps insertion opening and forceps channel
The operation part book having a connection part for connecting each tube
Internal view characterized by having a joint fixed to the body
mirror.