JP3272134B2 - 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, and more particularly, to a procedure for adjusting the direction of a treatment tool such as forceps inserted into a living body cavity using an endoscope. The present invention relates to an endoscope provided with a raising device.

[0002]

2. Description of the Related Art An endoscope is equipped with a treatment instrument raising device for adjusting the direction of a treatment instrument such as forceps inserted into a living body cavity using the endoscope. The treatment instrument raising device generally includes a treatment tool raising table rotatably mounted at a distal end of an insertion portion of an endoscope, and a rotation device mounted on an operation unit connected to a base end side of the insertion portion. A raising table operating means, a converting means for converting the rotating operation of the raising table operating means into a reciprocating operation along the axial direction of the insertion section, and the inside of the insertion section movably in the axial direction of the insertion section. And a transmitting means for transmitting the reciprocating operation of the converting means to the treatment instrument raising table by inserting the distal end portion to the treatment instrument raising table and connecting the base end portion to the conversion means. Although the configuration is such that the raising / lowering of the treatment instrument raising table is controlled by the reciprocating operation of the transmission means interlocking with the rotation operation of the upper table operating means, the operability and the maintainability are improved. Improvements continue.

For example, in Japanese Patent Publication No. 62-41023, as the treatment instrument raising device, the converting means includes a rotating arm integrated with an operation knob as a raising table operating means, and a cam length formed on the rotating arm. A slider provided with a pin engaged with the hole, a guide rail supporting the slider slidably in the axial direction of the insertion portion of the endoscope, and the like, wherein the turning operation of the operation knob is reciprocated by the slider. FIG. 3 shows a configuration in which a base end of a wire serving as the transmission means is connected to the slider. In addition, the conversion means and the base end of a wire connected to the conversion means are configured to be exposed to a grip portion which is a part of the operation section which is gripped by the operator. In the treatment instrument raising device having such a configuration, the rotating arm can be used as a booster mechanism. Therefore, a large force is not required when rotating the operation knob for raising and inverting the treatment instrument, and operability is improved. Can be improved.

However, in general, the structure of the conversion means is easily complicated, and since the complicated structure is exposed in the grip portion, there is a problem that it is difficult to remove dirt at the time of cleaning, and a large amount of time is required for the cleaning operation. In the event of dropping, there is a problem in that a direct impact acts on the conversion means, which easily causes damage or the like. Further, the connecting portion between the conversion means and the transmission means is usually preferably made of a metal material in order to secure mechanical strength, but since this portion is exposed to the grip portion, it is usually made of a metal material. For example, there is a problem that insulation of the grip portion is impaired. Therefore, for example, as shown in Japanese Utility Model Laid-Open No. 4-108507, the conversion means and the connecting portion between the conversion means and the transmission means are all housed in a grip part having an insulating and waterproof structure. Configurations have also been proposed.

[0005]

However, in the case of such a configuration, for example, when a wire as a transmission means is broken, a troublesome operation such as removal of a grip portion is required each time. This causes a problem that wire maintenance and the like cannot be performed easily.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to solve the above-mentioned problems, and it is possible to easily exchange the transmission means and the like, so that the workability and maintainability are excellent, and the insulating property required for the grip portion is required. It is an object of the present invention to provide an endoscope which can secure the image quality, and at the same time, hardly causes the conversion means to be damaged even in the event of a fall or the like, and can easily perform cleaning or the like.

[0007]

SUMMARY OF THE INVENTION It is an object of the present invention to provide a treatment instrument raising table rotatably provided at a distal end of an insertion portion of an endoscope, and an operation device connected to a base end of the insertion portion. Elevator operation means rotatably provided on the unit, and conversion means provided in the operation unit for converting the rotational operation of the elevator operation means into a reciprocating operation along the substantially axial direction of the insertion unit, The distal end portion is connected to the treatment instrument raising table so as to be freely movable along the substantially axial direction of the insertion portion, and the base portion is connected to the conversion means within the grip portion of the operation portion. A transmitting means for transmitting the reciprocating operation of the converting means to the treatment instrument raising table; and a sealing means in a grip portion for holding a connecting portion between a base end of the transmitting means and the converting means in a watertight manner to the outside. Transmission means interlocked with the turning operation of the elevator operating means The endoscope for controlling the elevator-inverted of the treatment instrument elevator base by the reciprocating operation, the transmitting means, base end portion is held watertight by the sealing means
A first transmitting means connected to the converting means in the grip portion and having a distal end extending out of the grip portion via the sealing means; and a proximal end having a distal end portion of the first transmitting means. And a second transmitting means having a distal end portion inserted through the insertion portion and connected to the treatment instrument raising base.

[0008]

According to the above construction of the present invention, for example, the first transmitting means constituting the transmitting means has a high strength shaft member,
The connecting portion of the second transmitting means using a wire that can be cut and the like can be selectively used, such as using a wire or the like having excellent flexibility as the transmitting means, is provided outside the grip portion. Therefore, even if the second transmission means needs to be replaced, it is not necessary to remove the grip portion. Therefore, the transmission means can be easily exchanged and the like, and the maintainability is excellent.

[0009] The conversion means and a connecting portion between the conversion means and the first transmission means are accommodated in a grip portion.
Since there is no structure in which the metal material is exposed in the grip portion, the insulation required for the grip portion can be secured. Even if an accident such as a drop occurs, the conversion means having a complicated structure is housed in the grip portion and does not directly act on the conversion means, so that the conversion means is less likely to be damaged.

Further, the converting means and the connecting portion between the converting means and the first transmitting means are arranged in the grip portion and held in a watertight manner by the sealing means in the grip, so that a complicated structural portion is exposed to the outside. Since cleaning is not performed, cleaning can be easily performed.

[0011]

DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS First, a first embodiment will be described with reference to the accompanying drawings. As shown in FIG. 1, the endoscope includes an operation unit 1, and the operation unit 1 is provided with a grip unit 2 for an operator to hold by hand. Further, the insertion section 3 and the universal cord 4 are connected to the operation section 1. The universal cord 4 has a connector 5 at an end. The connector 5 is connected to a light source device 6 for supplying illumination light and the like. The insertion section 3 has a bending section 8 that bendably operates by rotating an angle knob 7 provided on the operation section 1, and a tip section 9 is provided on the tip side of the bending section 8.

The distal end portion 9 is provided with an opening of a forceps channel extending inside the insertion portion 3. The other opening of the forceps channel is provided with the forceps opening 1
It is configured as 0. A forceps stopper 11 is attached to the forceps opening 10 as needed. In addition, a buckle (not shown) for preventing breakage is provided on the opposite end side of the insertion portion 3, and a buckle cover 12 covering the buckle is provided at an end on the operation unit 1 side. Have been.

The connector 5 includes an air supply device 1.
3 and the water supply device 14 are connected. Further, the video processor 15 for processing the video signal is connected to the connection adapter 1.
6 is connected to the connector 5. The video processor 15 includes, for example, a monitor 17 that displays a subject image based on a signal-processed video signal, a VTR deck 18 that records and reproduces a video signal, a video printer 19 that prints a subject image based on a video signal, and a video signal A video disk 20 or the like, which is a large-capacity storage device for recording, is connected. Switch 2 for operating video processor 15
1 is provided in the operation unit 1. Further, the operation unit 1 has an air supply / air supply for supplying air / water to the distal end portion 9 of the insertion unit 3.
A water supply switching valve 22 and a suction switching valve 23 for suction are provided. Suction is performed by a suction pump via a suction base (not shown) provided in the connector 5.

Further, the operation portion 1 is provided with a forceps raising wire opening 24 below the grip portion 2 and a drive shaft opening portion 25 in the grip portion 2. Here, from the forceps raising wire opening 24, the second in the present invention is referred to.
One end of a forceps raising wire 26, which is a transmission means, is led out, and from the drive shaft opening 25, a first transmission means moved by a forceps raising lever 27 provided coaxially with the angle knob 7. One end of a certain drive shaft 28 is led out.
The connection between the drive shaft 28 and the forceps raising wire 26 is performed by pressing and fixing the forceps raising wire 26 with, for example, a screw (see FIGS. 28 and 29) at a connection portion 29 provided on the insertion portion side of the drive shaft 28. As a result, the forceps raising wire 26 can be very easily detached from the drive shaft 28 by the connecting portion 29.

Next, the details of the tip portion 9 will be described with reference to FIGS.
0 will be described. Note that FIG.
FIG. 4B shows a longitudinal sectional structure of FIG.
(A) shows a DD cross section. FIG. 6A is a side view of the fixed cover 42 of the distal end portion 9,
FIG. 6B is an arrow view from the P direction with respect to FIG. Now, as shown in FIG. 2, the distal end portion 9 includes an objective lens 30, an illumination lens 31, and air,
It has a tip main body 33 provided with a nozzle 32 for jetting water or the like. The distal end 9 has a distal opening 35 of a channel 34 (see FIG. 5) communicating with the forceps opening 10 of the operating section 1.
(See FIG. 5), and a treatment instrument raising base 36 (hereinafter, referred to as a forceps raising table) for raising a treatment tool (not shown) such as forceps inserted into the channel 34 is provided ahead of the treatment tool.

As shown in FIG. 7 to FIG.
Has a chip storage portion 37 into which a tip 38 provided at the tip of the forceps raising wire 26 by swaging is inserted. The forceps raising table 36 is rotatably provided within a predetermined angle range on the slope portion main body 40 by a raising shaft 39 such as plastic. A detachable cover 41 made of an insulating member such as polysulfone or modified PPO and a fixed cover 42 are attached to the tip main body 33. The fixed cover 42 is attached to the tip main body 33 by a stopper pin 43 shown in FIG. The detachable cover 41 is adhered and fixed to the side hole 44 of the main body 33, and is provided integrally with the forceps raising base 36, the forceps raising wire 26, and the slope main body 40 so as to be detachable from the distal end portion 9.

FIGS. 10A and 10B show details of the slope main body 40. FIG. FIG. 10A is a plan view, and FIG. 10B is a front view. The slope portion main body 40 has, at the bottom thereof, a raising shaft hole 45 through which the raising shaft 39 passes, and a smooth slope along the running of the forceps raising wire 26 from the left side to the upper side in the figure. 46, and is configured to be connected to an upper surface 48 substantially parallel to a raising wire guide hole 47 penetrating upward. Upper surface 48
On the side wall on the side of the forceps raising base 36, there is provided a stopper projection 49 that defines the raising range of the forceps raising base 36.
Further, the slope portion main body 40 has a front end opening surface 50 on which the channel 34 is opened on the right side in the figure, and a forceps passage portion 51 that smoothly connects to the forceps raising base 36 from the surface is formed. The upper surface of the path portion 51 constitutes a raising guide portion 52 along a shape in which the forceps bends when the forceps are raised.

At this time, the center lines of the raising wire guide hole 47 and the forceps passage 51 are substantially parallel to each other.
5 is substantially vertical. The contact surface 53 of the slope 46 on the forceps raising base 36 side is substantially parallel to the side wall of the forceps raising base 36. Further, a cutout 54 is provided at the bottom where the bottom of the forceps raising stand 36 is located. At this time, the portion of the distal end body 33 having the objective lens 30, the illumination lens 31, and the nozzle 32 is formed such that at least the surface on the forceps raising base 36 side is flat, and the channel base 55 and the open end of the guide tube 56 are formed. Is also provided in an L-shape with respect to the bobbin bonding portion 57 so as to be also flat. The fixed cover 42 corresponding to this is also shown in FIG.
It has become as are shown in L-shape (b). As shown in FIG. 4, the bottom 89 at the end of the thread bonding portion 57 is formed by an O-shaped ring, and a concave groove 60 (see FIG. 2) having a cutout 59 is provided above the bottom. Further above, except for the lenses 30, 31 and the nozzle 32, etc.
3 is formed. The thread-bonded portion 57
It is a portion for fixing a curved rubber 61 made of an elastic material such as fluorine rubber and provided on the bending portion 8 so as to be easily bent.

On the other hand, the removable cover 41 has a bottom 58 formed of a C-shaped ring having a partially cut-out portion 62, and is provided so as to be elastically deformed and fitted into the concave groove 60 of the fixed cover 42. It is conceivable that the hardness of the concave groove 60 of the fixed cover 42 is substantially equal to or harder than the bottom 89 of the fixed cover 42, and at the same time, the detachable cover 41 is a plastic member having higher elasticity and better slipperiness than the fixed cover 42. It is conceivable to make it easier to put on and take off. The same material having high elasticity may be used. Specifically, it is conceivable that the hardness is increased by incorporating glass. Regarding elasticity, polyethylene, polyacetal, polypropylene, etc. have high elasticity,
Polysulfone and modified PPO are materials having low elasticity. As for the slipperiness, the slipperiness is enhanced by applying a PTFE coat, a fluororesin coat, applying a coating, applying a hydrophilic treatment or a water repellent treatment, or applying a glass bead or grain to a plastic mold. It is possible.

Further, the detachable cover 41 has a notch 63 above the bottom 58 to be fitted with the fixed cover 42.
Above it, a hook portion 64 is provided. On the other hand, the upper end 6
5 is formed in a smooth R shape. The hook 6
Reference numeral 4 denotes a locking means extending in a direction substantially perpendicular to the mounting / removing direction of the mounting / dismounting cover 41, and is fitted to the end of the distal end main body 33 .

As shown in FIG. 9, the slope portion main body 40, the forceps raising base 36, and the detachable cover 41 are formed so that at least the forceps raising base 36 can rotate with respect to the raising shaft 39 within a predetermined angle range. I have. Alternatively, as shown in FIG. 8, the forceps raising base 36 is formed integrally with the raising pin 66 from plastic or the like, and the raising pin 36 is formed in a hole provided in the slope section main body 40 so as to be rotatable with respect to the slope section main body 40. 66
May be inserted, and then the head of the raising pin 66 may be crushed by heat and fixed. Slope body 40 and removable cover 41
Are positioned and adhered by a convex portion 67 provided on the slope portion main body 40 and a positioning hole 68 provided on the detachable cover 41. For this purpose, an adhesive pool 69 is provided on the slope section main body 40. Further, as shown in FIG. 9, the forceps raising base 36 and the slope portion main body 40 may be rotatably connected by the raising shaft 39, and the slope portion main body 40 and the detachable cover 41 may be bonded to integrate the three bodies. .

FIGS. 3 to 5 show the structure of the distal end portion when assembly is completed. FIG. 5 is a cross-sectional view of the distal end section taken along a plane passing through the forceps raising table and perpendicular to the plane of FIG. 2 and parallel to the axis of the insertion section 3. As is apparent from these figures, a light guide fiber 70 for sending illumination light from the light source device 6 is opposed to the illumination lens 31, and the light guide fiber 70 has an adhesive inside the cutout 71 of the tip end main body 33. The notch 71 is covered with an adhesive cover 72, and the bent portion 8 is
A protective tube 73 made of silicon or the like is adhered and fixed over the entire length of the insertion portion 3, and a protective tube 74 made of silicon or the like is tied with a thread and fixed only above the curved portion 8. As shown in FIG. 7, the light guide fiber 70 is fixed to the side wall thread 76 of the distal end main body 33 with an HU screw 77. Similarly, a CCD 78 to which a lead (not shown) connected to the video processor 15 is connected faces the objective lens 30.

The lens unit 79 of the objective lens 30 is
As shown in FIG. 8, it is fastened by an HU screw 91 screwed into a side wall screw portion 90 of the distal end portion main body 33. Nozzle 32
As shown in FIGS. 3 and 4, the tip is narrowed and is fixedly adhered to the tip body 33, and the other end is provided with a cylinder (not shown) of the air / water switching valve 22. An air supply / water supply tube 80 connected to is fixed by being bound by a thread 81. A cutout portion 82 is provided in the distal end portion main body 33 at a connection portion of the air / water supply tube 80 to enable the air / water supply tube 80 to be bent.

As shown in FIG. 5, at least in the curved portion 6, the distal end of the tubular body provided with the coil 83 abuts on the convex portion 84 provided on the outer periphery of the channel base 55 as a tube member. It is configured to be adhered and fixed. The convex portion 84 of the channel base 55 abuts against the concave portion 85 of the distal end main body 33 and is adhesively fixed to the distal end main body 33, and the end of the channel base 55 on the forceps raising base 36 side is smoothly formed in the distal end opening 35. Adhesive is applied. The other end has a flared part extending outward.

The forceps contact surface 86 of the forceps raising stand 36 has a U-shaped groove shape with a smooth rise. Further, the forceps raising wire 26 reaches the operation unit 1 and the forceps raising wire opening 24 via the inside of the insertion section 3 by the guide tube 56 provided in the distal end opening 92. The guide tube 56 has a trumpet portion 87 formed at the end on the forceps raising base 36 side, and is adhesively fixed to a step hole 88 formed in the distal end main body 33. A slope main body 40 is formed on the distal end main body 33 along the movement path of the forceps raising wire 26, and a stopper projection 49 is provided in the middle of the slope main body 40 to regulate the raising range of the forceps raising base 36. . With the configuration described above, the distal end attaching / detaching portion 93 can be attached to and detached from the distal end portion main body 33.

FIG. 1 shows the details of the wire opening 24 for raising the forceps.
1 to 14 are shown. As shown in FIG. 11, a frame 94 provided in the operation unit 1 extends into the forceps raising wire opening 24, and the grip unit 2, the base fixing cover 95, and the forceps wire opening main body 96 are attached to the frame 94. Stopper ring 98 screwed into provided screw portion 97 and operating portion main body 9
Ru Tei is fixed sandwiched 9. As shown in FIG. 12, the insertion tube 100 has a connection base 102 screwed to a rear end base 101 fixed to the operation unit 1 by bonding or the like.
And a fixing ring 104 screwed to the rear end cap 101 are formed in the projection 94 protruding into the frame 94.
05 is fixed.

The rear end base 101 and the connection base 102
Is the hole 106 provided in the rear end base 101 and the connection base 1
The fixing pin 107 is fixed by fitting a fixing pin 107 into a groove 116 provided in the fixing member 02. An ordome 108 for protecting the insertion tube 100 is a screw portion 11 provided on an inner surface of an ordome base 109 which is insert-molded in the oredome 108.
0 and the screw portion 97 of the frame 94 are fixed by screwing. Further, on the outer surface of the sleeve 108, an sleeve cover 111 is inserted for watertightness with the insertion tube 100. And, odorome cover 1
11 and the insertion tube 100 are made watertight by bonding. Grip part 2 and base fixing cover 95,
Cap fixing cover 95 and forceps wire opening body 96, forceps wire opening body 96 and frame 94, frame 9
4 and the watertightness of the rear end cap 101 are respectively O-ring A1
12. This is performed by the modified packing 113, the O-ring B114, and the O-ring C115.

The base fixing cover 95 is shown in FIGS.
As shown in FIGS. 3 and 14, the positioning is performed by fitting a groove 119 formed by a projection 118 provided on the base fixing cover 95 into a fixing tool 117 screwed to the frame 94. Since the forceps raising wire opening main body 96 is fitted in substantially the same shape as the deformed portion of the base fixing cover 95, the forceps raising wire opening main body 96 is fitted.
Are also positioned.

As shown in FIGS. 11 and 13, the opening 120 of the base fixing cover 95 has an O-ring provided with a forceps raising guide tube base 121 in a concave groove 122 formed on the outer periphery thereof. And a pin 126 inserted into a hole 125 of the protrusion 124 of the base fixing cover 95.
And the pin 126 is fitted into the notch 127 of the forceps raising guide tube base 121 to position the forceps raising guide tube base 121. In the forceps raising guide tube 128 into which the forceps raising wire 26 is introduced, a rear end pipe 129 of the forceps raising guide tube 128 is adhered and fixed to the forceps raising guide tube base 121, and the other end has a tip forceps raising guide. After the guide tube 130 is tied to the guide tube 56 provided at the distal end portion 33, the guide tube 130 is adhered and fixed, and is disposed in the insertion portion 3.

FIG. 15 shows the structure of the guide tube 128 for raising the forceps. The forceps raising guide tube 128 protrudes one end of the distal forceps raising guide tube 130 provided at one end of the distal forceps raising guide pipe 131 into the guide tube 56 provided on the distal end body 33 to the distal end body end surface 139. Thread binding part 1
The distal end coil pipe 138 is placed on the outside of the distal end forceps raising guide tube 130 so as to be fixed at 40 and abutted thereon. The operating unit 1 end of the tip coil pipe 138 is
It is fixed to the forceps raising guide pipe 131 by soldering. A tube stopper tube 132 is soldered to the other end of the forceps raising guide pipe 131 with its end protruding. At the protruding end of the forceps raising guide pipe 131,
A rear end guide tube 133 for connecting to the rear end pipe 129 is put on the tube stopper tube 132, and the thread binding portion 134 is provided.
Further, a rear end coil pipe 135 as an exterior of the rear end guide tube 133 is abutted against the thread binding portion 134, and the other end is stopped by the thread binding portion 136.

On the other hand, as shown in FIGS. 11 and 14, the end of the forceps raising guide tube 128 on the operation section 1 side is provided with a guide plate 143.
The guide plate 14 is accommodated in the guide path groove 144 provided in the
The guide plate lid 145 (see FIG. 14) having a fitting projection 147 that fits into the third fitting hole 146 is inserted into the guide plate lid 145, and further, a rib-like introduction portion 153 provided inside the forceps wire opening main body 96. Is held down by the holding section 152 having Further, the base receiving portion 151 provided on the base fixing cover 95 is connected to the upper receiving portion 14 provided on the guide plate 143.
I try to hold 9. The guide plate 143 and the lower receiving portion 150 of the guide plate lid 145 are mounted on the outer periphery of the frame 94.

Details of the periphery of the drive shaft opening 25 and the forceps raising lever 27 in FIG. 1 are as shown in FIGS. 16 (a) and (b). Here, FIG. 16A shows a longitudinal sectional view, and FIG. 16B shows a plan view. That is, the forceps raising lever 27 is connected to the angle knob 7 extending into the operation unit 1.
With respect to the common support shaft 156, the concave groove 157 of the support shaft 156
Is rotatably mounted via a bearing 159 which is in contact with an O-ring 158 provided at the bottom. This bearing 159 is
Pressing flange 160 that presses forceps raising lever 27 at one end
And has a screw portion (not shown) on the outer periphery of the other end, and is screwed and fixed to the joint member 161. Forceps raising lever 2
Numeral 7 is fixed integrally with the pressing flange 160 by means such as bonding. The knob 162 on which a finger is actually put is fixed to the arm 164 by a screw 163. Bearing 15
9 has a concave groove 165 on the outer periphery, in which an O-ring 16
6 is provided so as to be rotatable with the operation unit main body 99 in a watertight manner.

One end of the joint member 161 in the operation portion main body 99 has a hook portion 167 and is provided rotatably with the link arm 169 via a pin 168. Also, link arm 1
The other end of 69 is similarly rotatably provided on pedestal 171 via pin 170. On both sides of the pedestal 171, fixed guide walls 172 having a concave cross section in the operation portion main body 99 are provided. An engagement hole 173 is provided on the insertion portion 3 side of the pedestal 171. The engagement hole 173 is screwed and fixed to a joint fixture 174 attached to the drive shaft 28. Drive coupling rod 17
5 has been inserted. At this time, the drive coupling rod 175 and the engagement hole 173 are connected so that the upper surface of the joint fixing tool 174 connected to the drive coupling rod 175 does not interfere with the drive shaft opening 25 due to variations in dimensions and assembly of the parts. A clearance is set between them to allow the drive coupling rod 175 to move in the axial direction. Therefore, when the forceps raising lever 27 is rotated, the pedestal 171 advances and retreats, and this advance and retreat is transmitted to the forceps raising table 36 of the distal end portion 9 via the drive joint rod 175, the drive shaft 28, and the forceps raising wire 26. , Forceps raising stand 36
Is raised and inverted. The stroke of the advance / retreat is determined by the stopper projection 49 on the distal end main body 33 at the time of raising, and by the stopper plate 177 attached to the guide plate 176 of the pedestal 171 to advance / retreat at the time of inversion. or,
Conventionally, the stopper plate 177 is individually dimensioned for each product in order to cope with a difference in stroke between products. However, in order to cope with this change in stroke, the stopper plate 177 is made common to all products . Change in stroke for each product
As shown in FIG. 17, the stopper plate 177 may have a configuration in which a stroke adjusting plate 200 is fixed to a pedestal 171 by screws.

As shown in FIG. 18, the connection between the forceps raising mechanism outside the operating section 1 and the forceps raising mechanism inside the operating section 1 is made by connecting the drive joint rod 175, the drive shaft 28, and the drive shaft opening 25 as shown in FIG.
Drive joint rod 175 of drive shaft unit 201 having
Pedestal 1 exposed in opening 202 of grip portion 2
It is achieved by inserting the engaging hole 173 of 71. A tapered portion 248 is formed in the engagement hole 173 so that the drive joint rod 175 can be easily inserted. At this time, the watertightness between the drive shaft unit 201 and the grip portion 2 is achieved by the modified packing 186 provided in the concave groove portion 203 facing the drive shaft opening 25. Also, the drive shaft unit 2
The first screw receiver 181 and the second screw receiver 249 fixed to the grip part 2 by the C-ring 204 are screwed with the screw 182 to fix the drive shaft opening 25 to the drive shaft opening 25.
Carried out by sandwiching a.

Since the inside of the grip portion 2 has the die-cut upper tapered portion 250, the first screw receiver 181 and the second screw receiver 249 are not common, and
Since the ring A 187 is common, the first screw receiver 18 at the time of assembly is used.
There is a possibility that the first and second screw receivers 249 are erroneously assembled. To prevent this erroneous assembly, as shown in FIGS. 19A and 19B, the width L of the provided rectangular portion A251 is set to be larger than the width 1 of the rectangular portion B252 of the second screw receiver 249. The first screw receiver 181 is connected to the second screw receiver 24.
9 does not enter the rectangular groove B253 to be fitted. FIG. 19A is a schematic perspective view before the screw receiver is assembled, and FIG. 19B is a cross-sectional view of the assembled state. If the second screw receiver 249 is temporarily inserted into the rectangular groove A254 of the first screw receiver 181, the rectangular portion B252 of the second screw receiver 249 is inserted so that the C ring 204 for retaining is not fitted. The depth d is smaller than the depth D of the rectangular portion A251 of the first screw receiver 181. As described above, the first screw receiver 181 and the second screw receiver 24
By changing the shape of No. 9, mis-assembly is prevented.

Drive shaft opening 2 into which screw 182 is fitted
In the fifth fitting hole 206, an insulating filler 207 is filled. In addition, the positions of the four fitting holes 206 provided in the drive opening 25 do not interfere with the movement of the drive shaft coupling rod 175 and the opening of the grip 2 is compact in order to keep the grip 2 compact. The drive shaft 2
8 is disposed on the sliding side. The first screw receiver 18
1. The watertightness of the second screw receiver 249 and the grip portion 2 and the watertightness of the grip portion 2 and the operation portion main body 99 are respectively O-ring A18.
7, O-ring B188. As a simple method for fixing the first screw receiver 181, as shown in FIG. 20, a retaining protrusion 256 is provided at the bottom of the screw receiver 181, and a fitting hole of the grip portion 2 having substantially the same shape as this shape is provided. A method of rotating after inserting into the 239 and receiving the grip portion 2 by the retaining protrusion 256 against the force in the detaching direction due to the elastic force of the O-ring A187 may be considered.

Next, the assembly procedure and configuration of the drive shaft unit 201 will be described. The drive shaft unit 201 is provided with a drive bearing unit 205 for holding the drive shaft 28. First, an assembling procedure and configuration of the drive bearing unit 205 will be described. First, as shown in FIG.
The O ring 178 and the drive shaft 28
The drive bearings 179 made of resin are alternately inserted to prevent damage. In addition, as shown in FIG.
The drive bearing 179 may be formed in an L-shape in order to equalize the distance between them.

Next, as shown in FIG.
The insert metal part 184, which is the insert part of No. 0, is screwed to the O-ring receiving metal part 183 and fixed by bonding. The insert hardware 184 is provided with an O-ring receiving portion 208 for receiving the O-ring 178 in the sliding direction of the drive shaft 28. Finally, the O-ring 185 is fitted into the concave groove 209 provided on the outer periphery of the O-ring receiving hardware 183, and the drive bearing unit 205 is completed. The same drive bearing 179 used for the drive bearing unit 205 is
The drive bearing unit 205 is dropped into the bearing portion 210 of the drive shaft opening 25, and the drive bearing unit 205 in which the adhesive is applied to the adhesive groove 211 provided on the outer periphery of the O-ring receiving metal member 183 is inserted and fixed thereon. Even if the adhesive is removed, the watertightness of the drive shaft opening 25 and the drive bearing unit 205 is maintained by the O-ring 185. Since the insert hardware 84 is not exposed on the drive shaft opening 25 side of the seal portion 180, the seal member 180 has substantially the same shape as the outer surface of the drive shaft opening 25 so that a finger does not touch the insert hardware 184.

Next, the drive shaft 28 is inserted into the drive bearing unit 205. At this time, since the inner diameter of the drive bearing 179 is smaller than the inner diameter of the O-ring receiver 183 on the side of the concave groove 209, the drive shaft 28 is not damaged by the O-ring receiver 183. Prevention and insulation of drive shaft 28,
To protect the O-ring 178, the drive shaft 28 may be covered with rubber by rubber ring, or may be coated with fluororesin. The seal portion 180 is exposed on the outer surface, and is made of rubber having strong tearing strength to facilitate the support of the drive shaft 28.
In order to maintain watertightness, a hemispherical watertight portion 212 is provided on the inner surface.

Then, as shown in FIGS. 23 and 24, the drive shaft 28 is advanced and retracted , the joint fixing member 174 is inserted, and the drive joint rod 175 is connected to the joint fixing member 174 from the back surface of the drive shaft opening 25. Screw and fix. As a method of fixing the drive shaft 28 and the drive joint rod 175, the configuration shown in FIGS. 25 and 26 can be considered. FIG. 25 and FIG. 26 will be described. The drive shaft 28 has a rectangular portion 213 for preventing rotation, and the drive joint bar 175 is provided with a fitting groove 214 for fitting the rectangular portion 213. To make the fitting groove 214 rectangular,
In processing, it is not a hole but a groove. The drive shaft 28 and the drive joint rod 175 are fixed by inserting the rectangular portion 213 into the fitting groove 214 and using NU screws 215. The screw hole position may be provided not in the vertical direction but in an oblique direction as shown in FIG. 27 on the back side of the drive shaft opening 25 in order to facilitate the screw tightening operation.

The drive coupling rod 175 and the pedestal 171 are fixed more firmly as shown in FIG.
The drive coupling rod 175 has a concave portion 245 and the pedestal 171 has a convex portion 24.
6 are provided and fitted and fixed. Further, even if a force acts in the sliding direction, the force acting on the drive joint bar 175 is diffused.
As shown in FIG. 5, the contact area is reduced in an arc shape . Further, as shown in FIG.
A guide rib 216 for guiding the drive shaft 28 in the sliding direction is provided on the rear surface of the drive shaft 5, and a lattice-shaped lightening is performed to further increase the strength of the drive shaft opening 25 and to make the drive shaft uniform. Part 21
7 are formed. In addition, the drive shaft 28 is
6, the dimension of the joint fixture 174 in the direction of contact with the shaft guide rib 216 is larger than the outer diameter of the drive shaft 28 and the sliding resistance of the drive shaft 28 is reduced. A clearance is provided between the fixture 174 and the shaft guide rib 216.

Next, the structure of the connecting portion 29 provided on the insertion portion 3 side of the drive shaft 28 is shown in FIGS. Here, FIG. 28 shows a vertical cross section of the connecting portion 29, and FIG. 29 shows a KK cross section of FIG. The wire pressing portion main body 190 is screwed to the connection portion main body 189 of the drive shaft 28,
A wire guide portion 191 for guiding the forceps raising wire 26 is fixed to the connection portion main body 189 by a fixing screw 192. Then, a groove 193 provided in the connection portion main body 189 is provided.
A wire stopper 194 for preventing the wire pressing portion main body 190 inserted in the wire from coming off is prevented by the wire guide portion 191 and fixed. When fixing the forceps raising wire 26, the forceps raising wire 26 is connected to the wire guide 191.
Of the wire pressing portion main body 19
0 to rotate the forceps raising wire 26 to the wire pressing portion 1.
It is fixed by pressing and deforming at 96. By the way, the drive shaft 28 is a portion exposed to the outside, and an external force is easily applied. As a countermeasure, the cross-sectional shape of the drive shaft 28 may not be a simple circular shape but may be an appropriate cross-sectional shape having higher rigidity as shown in FIGS. 30 (a), 30 (b) and 30 (c). In addition, the seal portion 180 that supports the drive shaft 28 and is watertight is preferably configured so that the shape of the portion fitted to the drive shaft 28 is substantially the same as the cross-sectional shape of the drive shaft 28 and is slightly smaller. Good.

Further, in order to protect the connection portion 29, as shown in FIG. 31, an insulative protective cover 222 is provided detachably to the operation unit 1. This protective cover 222
Is inserted into the positioning hole 223 provided in the drive shaft opening 25, the positioning protrusion 224 of the protection cover 222 is inserted, the protection cover 222 is pushed into the operation unit 1 side, and then the syringe provided in the forceps raising guide tube base 121 is inserted. It is fixed by fitting the syringe taper recess 226 of the protection cover 222 to the taper projection 225.

In the first embodiment, FIGS.
As shown in FIG. 3, a wire guide tube 21 such as a coil pipe for guiding an angle operation wire 218 for operating the bending portion 8 is provided.
9 guide tube fixture 2 attached to the end of the operation unit 1
The fixing position of the unit 20 to the operation unit 1 is arranged in the opening 202 of the grip unit 2, and the guide tube fixing unit 220 is provided with an adjusting mechanism by screwing. Thereby, the drive shaft unit 201
By simply taking out the angle, adjustment can be performed when the angle is poor.

Next, the operation and effect of the first embodiment will be described with reference to the drawings. The endoscope shown as the first embodiment, in other words, the forceps erecting base 36 whose distal end is a treatment instrument erecting base while being movably inserted through the insertion part 3 along the axial direction of the insertion part 3. And a base end thereof is connected to a drive coupling rod 175 as a conversion means in a grip portion 2 which is a part of the operation portion 1 and which is gripped by an operator. A transmitting means for transmitting the reciprocating operation of the converting means to the forceps raising stand 36 has a base end connected to the drive joint rod 175 in the waterproof structure of the grip part 2 and a distal end part out of the grip part 2. The extended drive shaft 28 serving as the first transmission means, the base end of which is connected to the distal end of the drive shaft 28, and the distal end of which is connected to the forceps raising base 36 through the insertion portion 3. It is divided into a forceps raising wire 26 as a second transmission means. There is a possibility that cutting or the like may occur by using different materials, such as using a high-strength shaft member for the first transmission means and a wire or the like having excellent flexibility for the second transmission means. Since the connecting part of the second transmission means using the wire is set outside the grip part 2, it is not necessary to remove the grip part 2 even if the second transmission means needs to be replaced. Therefore, the transmission means can be easily incorporated or replaced, and the assembling workability and the maintainability are excellent.

The connecting portion between the drive coupling rod 175, which is the distal end of the converting means, and the base end of the drive shaft 28, which is the first transmitting means, is provided with the grip portion 2 which is held watertight by a suitable sealing means. It is housed in a waterproof structure and has a grip 2
Since there is no structure in which the metal material is exposed, the insulation required for the grip portion 2 can be ensured. Then, even if an accident such as a fall occurs, the conversion means having a complicated structure is housed in the grip portion, and the connecting portion between the drive shaft 28 and the forceps raising wire 26 is also covered by the protective cover 222. Since an impact does not act directly on the converting means and the connecting portion, damage to the converting means and the connecting portion is less likely to occur.

Further, since the converting means and the connecting portion between the converting means and the first transmitting means are arranged in the grip portion and covered by the waterproof structure of the grip portion,
Since the complicated structural part is not exposed to the outside, cleaning or the like can be easily performed.

The connecting portion between the tip of the conversion means and the drive shaft 28 as the first transmission means is unitized as a drive shaft unit 201, which can be easily attached to and detached from the grip portion 2. In the unlikely event that a part of the transmission means is damaged, the work such as replacement can be completed promptly.

Hereinafter, a second embodiment of the present invention will be described. FIG. 34 is a schematic perspective view showing a main part of a second embodiment of the endoscope according to the present invention. In the second embodiment, the mounting structure of the drive shaft unit 201 in the first embodiment is improved. That is, the grip part 2
And the watertightness of the drive shaft unit 201 is performed by the rubber packing 227. Thereby, the first screw receiver 181 and the
The O-ring A187 of the second screw receiver 249 is eliminated. Other parts are the same as those in the first embodiment. Therefore, as in the case of the first embodiment, effects such as protection of the forceps raising mechanism portion such as the converting means from impact, securing of insulation at the grip portion, and ease of cleaning can be provided.

Hereinafter, a third embodiment of the present invention will be described. FIG. 21 described above shows a main part of a third embodiment of the endoscope according to the present invention. In the third embodiment, a plurality of O-rings 17
A drive bearing 179 made of a resin for preventing contact between the O-ring 8 and the O-ring 178 is provided, and an insert hardware 184 inserted into the seal portion 180 of the elastic member is screwed and fixed. The seal portion 180 has a hemispherical watertight portion 212. The inner diameter of the O-ring 178 is smaller than the inner diameter of the drive bearing 179, and the inner diameter of the drive bearing 178 is larger than the outer diameter of the drive shaft 28. Other parts are the same as in the first embodiment. In this case, the drive shaft 28 is supported by a plurality of elastic members and watertight members.
Therefore , even if an external force is applied to the drive shaft 28, the drive shaft 28 does not deform. Further, since the drive shaft 28 does not contact the metal member, the drive shaft is not damaged. Therefore, even when the portion for supporting the drive shaft 28 is small and the supporting component is made of a hard material such as metal, the drive shaft 28 is deformed by the action of an external impact or the like, resulting in malfunction. It is possible to reduce the occurrence of inconveniences such as occurrence of water or damage to the drive shaft 28 and water leakage.

Hereinafter, a fourth embodiment of the present invention will be described. FIG. 35 shows a main part of a fourth embodiment of the endoscope according to the present invention. In the fourth embodiment, the receiving rubber 228 having the plurality of convex portions 230 is
29 to prevent the receiving rubber 228 from coming off, the holding rubber 232 having a watertight part 231 is
9 and is fixed to the flange portion 233.
Other parts are the same as in the first embodiment. Even with such a configuration, the same effect as in the first embodiment can be obtained.

Hereinafter, a fifth embodiment of the present invention will be described. FIG. 36 shows a main part of a fifth embodiment of the endoscope according to the present invention. In the fifth embodiment, the connecting portion of the forceps raising wire 26 is detachable from the
The protective cover 222 made of resin for protecting
An elevating stopper 234 and an inverting stopper 235 for determining the inverting stroke are provided. Other than that, it is the same as the first embodiment. In the conventional case, the forceps raising table 36
The stopper for determining the inverted position is usually provided in the distal end portion 9 or the operation unit 1, and the user cannot adjust the raising / inverted position desired by the user. In addition, since the rising / inverting stroke differs depending on the product, the operation unit 1 cannot be used in common for those having a stopper in the operation unit 1 due to the difference in the position of the stopper. However, in the configuration as in the fifth embodiment, since the raising and lowering stoppers 234 and 235 are provided on the detachable protective cover 222, the protective cover 222 corresponding to the raising and lowering strokes is provided for each product. If used, the operation unit 1 can be shared. If the user prepares a different protective cover 222 for raising and reversing, just change the protective cover 222,
It is possible to set the position where the user desires the raising / inverting position of the forceps raising base 36.

Hereinafter, a sixth embodiment of the present invention will be described. FIG. 37 shows a main part of a sixth embodiment of the endoscope according to the present invention. In the sixth embodiment, a number of screw portions 236 are provided on the protective cover 222 so that the raising stopper pin 237 and the inverted stopper pin 238 can be screwed into necessary portions and fixed. Other configurations are the first
This is the same as the embodiment. In this case, in addition to the function and effect of the first embodiment, the protective cover 222 is of one type.
It is possible to obtain an effect that the operation unit can be shared and the user can set the rising / inverting stroke.

Hereinafter, a seventh embodiment of the present invention will be described. FIG. 38 shows a main part of a seventh embodiment of the endoscope according to the present invention. In the seventh embodiment, the fixing of the grip portion 2 and the drive shaft opening 25 will be described as an example. An O-ring A187 is inserted into a concave groove 238 provided on the outer periphery of a screw receiver 255 made of metal and having a screw hole, and in this state, an abutting portion of the grip portion 2 is inserted into a fitting hole 239 of the grip portion 2. 243 until it abuts. Next, the C-ring groove 240 provided in the screw receiver 255
Insert the C-ring 204 into the. With this, screw holder 25
The grip portion 2 has a rectangular hole 241 in which the screw hole 255 is formed.
Since a rectangular portion 242 having substantially the same shape as that of FIG.
Is screwed, the screw receiver 255 does not rotate. The watertightness of the grip portion 2 and the screw receiver 255 is maintained by an O-ring A187. Then, the screw 182 is inserted into the fitting hole 206 of the drive shaft opening 25 and screwed into the screw receiver 255 so that the drive shaft opening 25 is fixed to the grip portion 2.
Conventionally, screws were directly fixed to the resin casing. However, when screws are fixed to the resin casing, the screw ridges on the resin side have low strength, so the fixing strength is also low. Also, if a screw is attached or detached many times, the screw mountain will be cut off and cannot be used. However, according to the seventh embodiment, even if the screws are fixed to the casing,
Screws can be attached and detached many times, and firm fixing is also possible. In addition, watertightness is maintained as usual.

Hereinafter, an eighth embodiment of the present invention will be described. FIG. 39 shows an essential part of an endoscope according to an eighth embodiment of the present invention. FIG. 39 (a) is a front sectional view,
FIG. 39B is a side sectional view. In the eighth embodiment, the engagement hole 1 of the pedestal 171 with which the drive coupling rod 175 engages
73 is provided with a clearance C in the direction perpendicular to the sliding direction of the drive shaft 28. For example, the drive coupling rod 175 is
If the drive coupling rod 175 is overloaded due to sliding of the drive shaft 28 if it is fixed to the first engagement hole 173 only by engagement, there is no relief for the drive coupling rod 175.
Bends and causes poor sliding. However, with the configuration as in this embodiment, the drive coupling rod 175 and the pedestal 1
71, there is a clearance between the engagement hole 173 and the drive coupling rod 175 even if the drive coupling rod 175 is overloaded.
In the case of No. 5, since there is a place to escape, poor sliding due to bending of the drive coupling rod 175 can be prevented.

Hereinafter, a ninth embodiment of the present invention will be described. FIG. 40 shows a main part of a ninth embodiment of the endoscope according to the present invention. In the ninth embodiment, a number of stopper projections 244 are provided on the protective cover 222. By doing so, the manufacturer leaves the stopper projection 244 of the protective cover 222 only at the desired inverted and raised position, and removes the other by folding or the like, whereby the protective cover 22 is removed.
Reference numeral 2 denotes a resin, which is made by injection molding. However, there is no need to make a mold for each protective cover 222 having a different inversion / raising stroke, thereby greatly reducing the processing cost.

Hereinafter, a tenth embodiment of the present invention will be described. FIG. 41 shows a main part of a tenth embodiment of the endoscope according to the present invention. The tenth embodiment is characterized in that, of the first transmitting means and the sealing means, a portion for sealing the first transmitting means is unitized. The portion of the first transmitting means extending from the sealing means is exposed to the outside, so that it is easily damaged during use or cleaning, and easily deformed by an external force. Further, since this seal portion is not a fixed portion but a sliding portion, it is greatly consumed and it is difficult to maintain a watertight function. Furthermore, when assembling an endoscope, it is very troublesome for an operator to assemble small parts such as a seal part. Therefore, of the first transmitting means and the sealing means, the part that seals the first transmitting means is unitized, so that when the unit is replaced, the part that is sealed in advance is unitized. Can be tested for water tightness, and when assembling the endoscope,
The work is easy to perform because it is assembled in a unit state that is easy to handle instead of assembling small parts. After that, the sealing portion and the other sealing portions may be connected in a water-tight manner. However, since the sealing portion is a fixed portion, the assembly can be performed while ensuring water-tightness, so that the operation is easy.
Further, when the portion extending from the sealing means is damaged, deformed, or the slidable sealing portion does not have a watertight function, the unit may be replaced, so that the repair workability is good.

As shown in FIGS. 18 and 23, the restricting means for restricting the axial movement range of the first transmitting means is provided in the opening of the sealing portion of the sealing means for sealing the first transmitting means. It is also conceivable to adopt a configuration in which the first transmission means is provided in a portion to be sealed. By doing so, the movement range can be easily regulated in a state where the portion for sealing the first transmission means is removed from the sealing means.

[0059]

As described above, according to the endoscope of the present invention, the first transmitting means constituting the transmitting means has a high strength shaft member, and the second transmitting means has flexibility. The connecting portion of the second transmission means using a wire that can be used properly, such as using an excellent wire, may cause cutting or the like, is set outside the grip portion. Even if the transmission means 2 needs to be replaced, there is no need to remove the grip portion. Therefore, the transmission means can be easily incorporated or replaced, and the workability and maintainability are excellent. Further, since the converting means and the connecting portion between the converting means and the first transmitting means are housed in the grip portion and there is no structure in which the metal material is exposed in the grip portion, the insulating property required for the grip portion is not provided. Can be secured. And
Even if an accident such as a drop occurs, the conversion means having a complicated structure is housed in the grip portion and does not directly act on the conversion means, so that the conversion means can be hardly damaged. Further, the converting means and the connecting portion between the converting means and the first transmitting means are arranged in the grip portion and held in a watertight manner by the sealing means in the grip, so that a complicated structural portion is not exposed to the outside. Therefore, washing and the like can be easily performed, and the handling property is good.

[Brief description of the drawings]

FIG. 1 is a schematic configuration diagram showing an entire first embodiment of the present invention.

FIG. 2 is a schematic explanatory view of a distal end of an insertion portion according to the first embodiment of the present invention.

FIG. 3 is an enlarged plan view of the distal end of the insertion portion according to the first embodiment of the present invention.

FIG. 4 is an enlarged view of the distal end of the insertion portion according to the first embodiment of the present invention.

FIG. 5 is an operation explanatory view of the forceps raising base in the first embodiment of the present invention.

FIG. 6 is an explanatory view of a fixed cover at a distal end shown in FIG. 4;

FIG. 7 is a sectional view taken along the line EE in FIG.

FIG. 8 is a sectional view taken along line FF of FIG. 3;

FIG. 9 is a sectional view taken along line HH of FIG. 5;

FIG. 10 is an enlarged view of a slope portion main body according to the first embodiment.

FIG. 11 is a detailed view of a forceps raising wire opening of the first embodiment.

FIG. 12 is a detailed view of a portion J in FIG. 11;

FIG. 13 is a detailed view of a portion K in FIG. 11;

FIG. 14 is a sectional view taken along the line II of FIG. 11;

FIG. 15 is a detailed view of a forceps raising guide tube of the first embodiment.

FIG. 16 is a detailed view of the drive shaft opening of the first embodiment.

FIG. 17 is an explanatory diagram of an example of installation of a stopper plate according to the first embodiment.

FIG. 18 is an enlarged view around a drive shaft opening of the first embodiment.

FIG. 19 is an explanatory view of assembling the first and second screw receivers of the first embodiment.

FIG. 20 is an explanatory view of a modification of the first screw receiver fixing method of the first embodiment.

FIG. 21 is a detailed view of the drive bearing unit of the first embodiment.

FIG. 22 is an explanatory view of a modified example of the drive bearing unit of the first embodiment.

FIG. 23 is an explanatory diagram of a drive shaft unit according to the first embodiment.

24 is a sectional view taken along the line KK of FIG.

FIG. 25 is an explanatory view of a drive joint rod fixing structure according to the first embodiment.

FIG. 26 is a sectional view taken along line JJ of FIG. 25.

FIG. 27 is an explanatory diagram of a modified example of the drive coupling rod fixing structure of the first embodiment.

FIG. 28 is a longitudinal sectional view showing the connection between the first transmission means and the second transmission means of the first embodiment.

29 is a sectional view taken along the line KK of FIG. 28.

FIG. 30 is an explanatory diagram of a modified example of a cross-sectional shape of a drive shaft that is a first transmission unit of the first embodiment.

FIG. 31 is an explanatory diagram of a connecting portion between a drive shaft as a first transmitting means and a forceps raising wire as a second transmitting means in the first embodiment.

FIG. 32 is a plan view showing an angle operation wire connection structure for operating the bending portion according to the first embodiment.

FIG. 33 is a transverse sectional view of the angle operation wire connection structure shown in FIG. 32;

FIG. 34 is a perspective view of a main part of a second embodiment of the present invention.

FIG. 35 is an explanatory diagram of a configuration of a main part of a fourth embodiment of the present invention.

FIG. 36 is an explanatory diagram of a main part of a fifth embodiment of the present invention.

FIG. 37 is an explanatory diagram of a main part of a sixth embodiment of the present invention.

FIG. 38 is an explanatory diagram of a main part of a seventh embodiment of the present invention.

FIG. 39 is an explanatory diagram of a main part of an eighth embodiment of the present invention.

FIG. 40 is an explanatory diagram of a main part of a ninth embodiment of the present invention.

FIG. 41 is an explanatory diagram of a main part of a tenth embodiment of the present invention.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 Operating part 2 Grip part 3 Insertion part 4 Universal cord 5 Connector 7 Angle knob 8 Curved part 9 Tip part 10 Forceps opening 11 Forceps plug 23 Suction switching valve 24 Forceps raising wire opening 25 Drive shaft opening 26 Forceps rising Wire (second transmitting means) 27 Forceps raising lever (raising table operating means) 28 Drive shaft (first transmitting means) 36 Forceps raising table 39 Raising axis 40 Slope section body 41 Removable cover 42 Fixed cover 45 Raising Shaft hole 46 Slope 47 Raised wire guide hole 51 Forceps passage 52 Raised guide 96 Forceps wire opening body 121 Forceps raised guide tube cap 128 Forceps raised guide tube 130 Tip forceps raised guide tube 133 Rear end guide tube 169 Link arm 171 Pedestal 172 Guide wall 173 Engagement hole 174 Joint fixture 175 Drive joint Hand stick 178 O-ring 179 Drive bearing 180 Seal part 181 First screw receiver 185 O-ring 201 Drive shaft unit 202 Opening 222 Protective cover 249 Second screw receiver

Continuation of the front page (72) Inventor Hideo Ito 2-43-2 Hatagaya, Shibuya-ku, Tokyo Inside the O-Limpus Optical Industry Co., Ltd. (72) Inventor Masaaki Nakazawa 2-43-2 Hatagaya, Shibuya-ku, Tokyo O-limpus Optics (72) Inventor Hisao Yabe 2-43-2 Hatagaya, Shibuya-ku, Tokyo Olympus Optical Co., Ltd. (56) References JP-A-58-44033 (JP, A) (58) Field (Int.Cl. ⁷ , DB name) A61B 1/00-1/32

Claims (1)

(57) [Claims] 1. A treatment instrument raising table rotatably provided at a distal end of an insertion portion of an endoscope, and a raising device rotatably provided on an operation portion connected to a base end side of the insertion portion. Upper stand operation means,
A conversion unit provided in the operation unit for converting a rotation operation of the elevator operating unit into a reciprocating operation along a substantially axial direction of the insertion unit; and a conversion unit movably along the substantially axial direction of the insertion unit. And the distal end portion is connected to the treatment instrument raising table, and the base end section is connected to the conversion means in the grip portion of the operation section to transmit the reciprocating operation of the conversion means to the treatment instrument raising table. A transmission means, and a sealing means in a grip portion for holding a connection portion between a base end of the transmission means and the conversion means in a watertight manner to the outside , wherein the transmission is interlocked with a turning operation of the elevator operating means. An endoscope for controlling raising and lowering of the treatment instrument raising table by reciprocating operation of a means, wherein the transmitting means has a base end water-tight by the sealing means.
The glycidyl tip through the sealing means while being connected to the converting means retained in said grip portion
A first transmitting means extending outside from the tap portion , a base end portion being freely connectable to a distal end portion of the first transmitting means, and a distal end portion being inserted through the insertion portion to perform the treatment. An endoscope comprising: a second transmission means connected to the raising table.