JPH05184534A - Endoscope - Google Patents

Abstract

PURPOSE:To execute a sufficient treatment by allowing the tips of two pieces of treating implements to easily reach a part to be treated with high operability. CONSTITUTION:The endoscope is provided with plural treating implement channels in which a treating implement can be inserted through in an inserting part 9. Between opening parts 24, 25 of the treating implement channels and the tip of the inserting part 9, a containing chamber 26 is provided and plural treating implement channels and the outside are allowed to communicate with each other. In the containing chamber 26, a treating implement raising member 27 for raising the treating implement inserted through the treating implement channel is provided, and one end of a raising wire is connected thereto. The raising wire is inserted through the inside of the inserting part 9 and the other end is inserted through to an operating part of a handy side, and by moving it forward and backward and turning the treating implement raising member 27, plural treating implements inserted through the treating implement channel are raised.

Description

Detailed Description of the Invention

[0001]

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to an endoscope having a plurality of treatment instrument channels and provided with a treatment instrument raising device for raising a treatment instrument inserted through the treatment instrument channels.

[0002]

2. Description of the Related Art Various therapeutic treatments can be performed by inserting an elongated insertion portion into a body cavity or the like to observe organs in the body cavity or the like, and by using a treatment instrument inserted into a treatment instrument channel as necessary. Possible endoscopes are widely used.

Such an endoscope is formed with a flexible insertion portion so that it can be inserted into a bent body cavity, and a treatment tool for performing various kinds of medical treatments can be inserted into this insertion portion. Is provided with a treatment instrument channel. A two-channel type endoscope including two treatment tool channels has also been proposed, and various treatments can be performed by inserting the two treatment tools.

The two-channel type endoscope is disclosed in Japanese Utility Model Laid-Open No. 48-81688. In this endoscope, the treatment instrument raising device for raising the inserted treatment instrument is provided only in one channel, and the treatment instrument raising device is not provided in the other channels.

However, in such an endoscope, there is a problem that the distal ends of the two treatment tools cannot reach the treatment site depending on the treatment site. Therefore, there has been a problem that sufficient treatment cannot be performed.

[0006]

As described above, in the conventional endoscope, depending on the site to be treated, the tips of the two treatment tools cannot reach the site to be treated, so that sufficient treatment is required. There is a problem that it cannot be performed.

On the other hand, when the treatment instrument raising device is provided in each of the two treatment instrument channels, the diameter of the distal end of the endoscope insertion portion becomes large. At the same time, the operator needs to operate each of the treatment instrument raising devices independently to raise and invert the two treatment instruments, which causes a problem that the operation becomes complicated.

The present invention has been made in view of these circumstances, and the tips of the two treatment tools can easily reach the site to be treated, and sufficient treatment can be performed, and It is an object of the present invention to provide an endoscope capable of improving operability without increasing the diameter of the endoscope insertion portion.

[0009]

The endoscope according to the present invention comprises:
An elongated insertion portion having a plurality of treatment instrument channels through which a treatment instrument can be inserted, and a storage chamber portion provided at a distal end portion of the insertion portion and communicating with the plurality of treatment instrument channels and at least a part of which is opened to the outside. And a treatment instrument raising member which is provided in the storage chamber and raises the treatment instrument inserted through the treatment instrument channel, and one end of which is connected to the treatment instrument raising member and which is inserted through the insertion portion to A raising wire for inserting a plurality of treatment tools inserted into the treatment instrument channel by rotating the treatment instrument raising member by moving the treatment instrument raising member forward and backward by inserting the operation portion on the hand side. is there.

[0010]

With the above structure, when the raising wire is advanced and retracted, the treatment instrument raising member is rotated, and the plurality of treatment instruments inserted in the treatment instrument channel are raised.

[0011]

Embodiments of the present invention will be described below with reference to the drawings. 1 to 11 relate to a first embodiment of the present invention,
1 is a front view showing the configuration of the distal end of the endoscope insertion portion, FIG. 2 is a configuration diagram of the entire endoscope apparatus, FIG. 3 is a sectional view taken along line AA in FIG. 1, and FIG. 4 is BB in FIG. FIG. 3 is a sectional view taken along the line
6 is a cross-sectional view taken along line C-C in FIG. 6, FIG. 6 is a cross-sectional explanatory view showing a mounting portion of a raising wire for performing a treatment instrument raising operation, FIG. 7 is a perspective view showing a configuration of an endoscope operating portion, and FIG. 9 is an explanatory view of the channel tube, FIG. 9 is an explanatory cross-sectional view showing the configuration of the distal end side connection portion of the treatment instrument channel tube, FIG. 10 shows the cross section in FIG. 9, (a) is a cross-sectional view taken along the line AA, (b) Is B-
FIG. 11 is a cross-sectional view taken along the line B, and FIG. 11 is an explanatory diagram showing the configuration of the connector portion connected to the light source and the fluid control device.

As shown in FIG. 2, the endoscope 1 according to the present embodiment.
Is a light source 2 that supplies illumination light, a fluid control device 3 that performs air supply, water supply, and suction, and a video processor 4 that processes an image signal of a subject imaged by a solid-state imaging device (not shown) in the endoscope 1. After being connected, the site to be examined is observed and treated. A monitor 5, a VTR deck 6, a video printer 7, and a video disk 8 are connected to the video processor 4, and are configured to display, record, reproduce, and output a subject image.

The endoscope 1 has an elongated insertion portion 9 which can be inserted into a body cavity or the like, and has a distal end portion 10, a bendable bending portion 11, and a flexible tube portion having flexibility. 12 are arranged in order. An operating portion 13 also serving as a grip portion is continuously provided on the hand side of the insertion portion 9, a universal cord 14 is extended from the side of the operating portion 13, and a light source 2 and a fluid control device are provided via a connector 15. 3 is connected. Also, from the side of the connector 15, the signal cable 1
6 extends to be connected to the video processor 4 through the connector 17. The operation section 13 is provided with a treatment instrument insertion opening 18 for inserting a treatment instrument or the like, and the insertion section 9 is provided with a treatment instrument channel communicating with the treatment instrument insertion opening 18 for Inserted through the treatment instrument insertion port 18 and inserted through the insertion portion 9,
Various treatments can be performed by projecting from the tip.

Next, the configuration of the distal end portion of the endoscope insertion portion 9 will be described with reference to FIGS. 1 and 3 to 6. As shown in FIG. 1, an observation window 21 having an objective lens system, an illumination window 22 having an illumination lens, and a nozzle 23 for supplying air and water are provided at the tip of the insertion section 9. In addition, the opening 24 of the first treatment tool channel and the opening 25 of the second treatment tool channel face each other, and these treatment tool channel openings 2
A storage chamber 26 is provided between the distal end surface of the insertion portion 9 and the housing 4, and a treatment instrument raising member 27 for raising and lowering the treatment instrument is disposed.

FIG. 3 shows a cross section taken along the line AA in FIG. The distal end portion 10 is provided with a hard distal end constituent member 30 and communicates with the first treatment tool channel 28. A storage chamber 26 in which a treatment instrument raising member 27 is disposed is provided on the tip end side of the opening 24 of the first treatment instrument channel 28 and opens to the outside. The channel tube 33 forming the treatment instrument channel 28 is the channel pipe 3
4 is connected to the tip forming member 30 and communicates with the storage chamber 26. The channel pipe 34 is fixed to the tip forming member 30 by soldering or the like. The insertion portion 9 is covered with a blade 35 and a rubber tube 36, and the tip side of the tip forming member 30 is covered with a tip cap 37.

A solid-state image pickup device 3 including an objective lens system.
1 is provided and is fixed to the tip component member 30 with a screw or the like (not shown). An image transmission cable 32 is connected to a rear end portion of the solid-state imaging device 31, the image transmission cable 32 is inserted through the insertion portion 9, and the other end is connected to the video processor 4 via the universal cord 14 and the signal cable 16. An image signal of a subject image which is connected and imaged by the solid-state imaging device 31 and an imaging device driving signal from the video processor 4 are transmitted.

FIG. 4 shows a section taken along the line BB in FIG. 1, and FIG. 5 shows a section taken along the line C-C in FIG. As with the first treatment instrument channel 28, the second treatment instrument channel 29 has a channel tube 33 connected to the distal end constituent member 30 via a channel pipe 34 and communicates with the storage chamber 26. The treatment instrument raising member 27, as shown in FIG. 5, crosses the storage chamber 26 and is installed between both wall portions of the rotary shaft 3.
8, one end of the rotary shaft 38 is rotatably fitted in the bearing hole 42 of the tip forming member 30, and the other end thereof is the screw portion 3.
8 a is provided and is screwed into the female screw portion 43 of the tip forming member 30. In addition, the treatment instrument raising member 27 is provided with grooves 44 and 45 with which the treatment instrument is engaged so that the two treatment instruments can be smoothly inserted, raised, and inverted. In FIG. 5, reference numeral 47 is a light guide bundle that transmits the illumination light from the light source 2 to the illumination window 22, and 48 is an air-feeding and water-feeding conduit for feeding air from the nozzle 23 to the observation window 21. is there.

As shown in FIG. 4, a raising wire 40 for rotating the treatment instrument raising member 27 is provided, and one end thereof is connected to the projection 39 of the treatment instrument raising member 27. As shown in FIG. 6, a retaining ring 46 is attached to the distal end of the raising wire 40 by swaging, and the retaining ring 46 is attached to the tip of the raising wire 40.
Is inserted into the treatment instrument raising member 27 so that the raising wire 40 extends from the protrusion 39. It should be noted that by applying an adhesive such as a ceramic-based material before the swaging process, the retaining effect is further improved.

The raising wire 40 is further inserted into the insertion portion 9 through the raising wire insertion hole 41 of the tip forming member 30 and guided into the operation portion 13 through a guide pipe (not shown). As shown in FIG. 7, the operating section 13 is provided with a treatment tool raising knob 49 for raising operation, and the operating side of the treatment tool raising knob 49 has a proximal end of the raising wire 40. It is connected. That is, by operating the treatment instrument raising knob 49, the raising wire 40 is pushed and pulled, and the treatment instrument raising member 27 is rotated about the rotation shaft 38 to be raised and inverted. .. As a result, the treatment instrument inserted through the first and second treatment instrument channels 28 and 29 can be raised and inverted.

Now, the structure of the channel tube 33 will be described with reference to FIG. The channel tube 33 is made of fluororesin (PTFE, polytetrafluoroethylene), and has multiple helical grooves 51 formed of na rows (two rows in FIG. 8A) on the outer peripheral portion. .. In the spiral groove 51, nb lines (na ≧ nb,
Reinforcing wire rods 52a and 52b (two in FIG. 8A) are wound. The hardness of the channel tube 33 can be adjusted by the reinforcing wire 52. In addition, as shown in FIG. 8B, one reinforcing wire 5 is provided for each of the two spiral grooves 51.
2 may be wound.

In this way, the hardness of the channel tube 33 can be changed by adjusting the material and number of the reinforcing wire rods 52, the predetermined strength can be maintained, and the flexible flexible wire smooth curvature can be obtained. It can have sex. Although the number of the spiral grooves 51 is two in this embodiment, the hardness of the channel tube 33 can be finely adjusted by providing more spiral grooves and finely adjusting the number of reinforcing wires.

9 and 10 show the structure of the tip of the insertion portion 9 in the tip side connecting portion of the channel tube 33. A first joint portion 55 of a bending piece provided in the bending portion 11 is fitted and continuously provided on the tip constituent member 30 of the tip portion 10. A portion of the first joint portion 55 on the tip end side of the channel tube 33, that is, the channel tube 33.
U is inserted in the part where the channel pipe 34 is inserted.
A cutout is provided by the V-shaped groove 56, and a U-groove cutout portion 57 is formed. On the other hand, U groove notch 57
A deformed bulge portion 58 in which a portion of the channel tube 33 is bulged is formed only on the rear end side of the channel tube 33. FIG. 10A shows the U-groove notch 5
7 is a cross section of the deformed bulge portion 58, and FIG. That is, in the tip side connecting portion of the channel tube 33, the portion fixed by the channel pipe 34 forms the U groove cutout portion 57 by the U-shaped groove 56, and the tube is radially formed only by the channel tube 33. The moveable part forms a modified bulge 58.

As described above, when the channel tube 33 protrudes from the inner diameter of the first joint portion 55, the portion where the tube is fixed is provided with the U-shaped groove 56 to allow the outer diameter of the channel tube 33 to escape. By providing a deformed bulge at the portion where the tube is movable in the radial direction and allowing the outer diameter portion of the channel tube 33 to escape, the tip portion 10 can be made thinner. Conventionally, the channel tube 33 is the first
Since the bulge portion was provided over the entire portion protruding from the inner diameter of the joint portion 55, the bulge of the bulge portion must be increased in order to escape the entire portion, and the larger diameter portion and the longer diameter portion are longer. However, according to this embodiment, at least the first groove is formed because the U-groove notch 57 is provided.
The thickness of the joint 55 can be reduced, and the large bulge can be shortened. Further, since only the portion of the channel tube 33 is movable in the radial direction, the channel tube 33 can be inserted inside, and the bulge of the bulge portion can be minimized.

The universal cord 14 of the endoscope 1
The connector 15 at the tip is constructed as shown in FIG. As shown in FIG. 11 (a), a fluid pipeline system 60 (including the above-described air / water pipeline 48) that carries out air / water / suction.
Is provided so that the opening in the connector 15 is opened straight in the axial direction of the universal cord 14. Along with this, the light guide bundle 47 is provided so that the connector 15 meanders so as not to interfere with the fluid conduit system 60 and the tip projects in the axial direction of the universal cord 14. The connector 15 configured in this way
Are connected to the light source 2 and the fluid control device 3. The light source 2 and the fluid control device 3 are provided so as to be adjacent to each other so that the endoscope 1 can be attached and detached by one connector 15. Further, the fluid control device 3 is provided with an air / water supply control device 61 which is provided with an electromagnetic valve or the like to electrically control air supply and water supply, and is in communication with the fluid pipeline system 60. ing.

As described above, by forming the fluid pipe system 60 in a straight state up to the opening, dirt and water are less likely to collect and cleaning such as brushing can be easily performed. In addition, since the switching of air supply, water supply, etc. is electrically controlled by the air supply / water supply control device 61, the fluid pipe system 60 of the endoscope 1 does not need a switching mechanism and the configuration is simplified. it can.

Further, as shown in FIG. 11B, in the connector 15a, the light guide bundle 47 is bent at a right angle to the side opposite to the fluid conduit system 60 so that the tip projects laterally. The same effect can be obtained by connecting the light source 2 and the fluid control device 3.

By the way, as shown in FIG. 12, a flexible tube 65 is provided in the flexible tube portion 12 of the endoscope insertion portion 9.
It is also possible to change the flexibility of the insertion portion flexible tube portion 12 by providing the above and by press-fitting the fluid 66 into the tube 65.

The tube 65 is adapted to pass through the flexible tube portion 12 and open at the fluid inlet of the operating portion 13 on the near side. A check valve 67 is provided at this fluid inlet to prevent backflow of the fluid that has been press-fitted. In this way, by press-fitting the fluid 66 into the tube 65,
The flexibility of the flexible tube portion 12 changes, and the flexibility can be adjusted depending on the amount and type of the fluid 66. Further, the press-fitting of the fluid 66 increases the repulsive force due to the elasticity of the flexible tube portion 12.

The operation of this embodiment configured as described above will be described. The insertion portion 9 of the endoscope 1 is inserted into a body cavity or the like, and the tip portion is made to reach the site to be examined. When performing a treatment by observing the site to be inspected, the treatment instrument is inserted into the treatment instrument insertion port 18
Then, it is inserted through the treatment instrument channels 28 and 29 of the insertion portion 9 to protrude from the tip of the insertion portion 9.

Next, the treatment instrument raising knob 49 of the operation portion 13 is operated to pull the raising wire 40 to raise the treatment instrument raising member 27. In the treatment instrument raising member 27, two treatment instruments that are inserted through the first and second treatment instrument channels 28 and 29 and project from the channel opening portions 24 and 25 are engaged with the groove portions 44 and 45. These treatment tools are raised by the rotation of the treatment tool raising member 27 and reach the target treated site. The two treatment tools can be raised and lowered by moving the raising wire 40 forward and backward by the treatment tool raising knob 49. Then, the treatment site is treated using the raised treatment tool.

As described above, one treatment wire raising member 27 can be rotated by one raising wire 40 to raise two treatment instruments. As a result, the distal ends of the two treatment tools can easily reach a desired position, various treatments can be easily performed, and sufficient treatment with the endoscope can be performed. Moreover, since the two treatment tools can be raised by one operation, the operability for the treatment is improved. In addition, since one treatment wire is used to raise two treatment tools, operability is improved and sufficient treatment can be performed as described above, while preventing the insertion portion from becoming thicker. it can.

FIG. 13 is a sectional view showing the structure of the distal end of the endoscope insertion portion according to the second embodiment of the present invention.

The second embodiment is a modification of the first embodiment,
FIG. 13 shows a position similar to that of the sectional view shown in FIG. In this embodiment, the distal end constituting member 70 is formed so that the axes of the openings of the treatment instrument channels 28 and 29 are inclined with respect to the axial direction of the insertion portion 9, and the distal ends of the treatment instruments inserted into the treatment instrument channels 28 and 29 are inserted. Are configured to approach each other. That is, the channel pipe 34 is soldered or the like so as to be inclined with respect to the axial direction of the insertion portion 9, and the tip constituent member 7 is formed.
It is stuck at 0. Further, the treatment instrument raising member 71 is provided with groove portions 72 and 73 which are coaxial with the channel pipe 34 and are formed in a V shape. Others are the same as those in the first embodiment, and the description of the same components will be omitted.

As described above, according to the second embodiment, since the axes of the openings of the treatment instrument channels 28 and 29 are inclined, the tips of the two inserted treatment instruments are brought close to each other and the two treatment instruments are inserted. The distal treatment portion of the treatment tool can be brought close to each other or the distal portions can be crossed, and various treatments can be performed more easily.

FIG. 14 is a view showing the structure of the distal end of the endoscope insertion section according to the third embodiment of the present invention, in which (a) is a sectional view.
(B) is the explanatory view which expanded and showed the arm part of a treatment implement raising member, (c) is sectional explanatory drawing which shows the relationship between the arm part of a treatment implement raising member and a raising wire.

The third embodiment is an example in which a treatment instrument raising member is provided separately corresponding to each of the treatment instrument channels 28 and 29. FIG. 14A shows the same position as the cross-sectional view shown in FIG.

As shown in FIG. 14A, two treatment instrument raising members 81 and 82 are provided corresponding to the treatment instrument channels 28 and 29. The treatment instrument raising members 81, 82 are
Revolving shafts 83 and 84 are rotatably supported by the tip forming member 80. The rotating shafts 83, 84 have one end rotatably fitted in the bearing hole of the tip forming member 80, and the screw portions 83a, 84a at the other end are screwed into the female screw portions 85, 86 of the tip forming member 80, respectively. There is. Also, the rotating shaft 8
The outer sides of the units 3, 84 are inclined upward with respect to the horizontal axis in FIG.

The treatment instrument raising members 81, 82 are provided with grooves 87, 88 for engagement with the treatment instruments inserted through the treatment instrument channels 28, 29, respectively.
a and 82a are projected. The arm 81a is shown in FIG.
As shown in (b), an elongated hole 89 is formed in the longitudinal direction of the arm portion 81a.
Is provided, and the arm portion 82a is also formed with an elongated hole. The arm portions 81a, 82a are arranged so that the two elongated holes are in contact with each other in front and back. In this long hole 89, as shown in FIG.
As shown in FIG. 4 (c), the raising wire 40 is inserted, and a retaining member 90 having a diameter larger than the minor diameter of the elongated hole 89 is fixed to the tip of the raising wire 40.
The treatment instrument raising members 81 and 82 are raised and inverted by advancing and retracting.

When the treatment instrument raising members 81 and 82 are raised, the treatment instrument raising members 81 and 82 approach each other, and the positions where the two elongated holes coincide move to move the raising wire 40 to the arm portion 81.
14A, the length L of the elongated hole 89 shown in FIG. 14B has such a length that the treatment instrument raising members 81 and 82 can be completely raised and inverted. ing. Also,
Depending on the length L of the long hole 89, the length M of the arm portions 81a, 82a
Has also been decided. However, the length M of the arm portions 81a and 82a is such that the arm portion 81a is the treatment instrument raising member 82 and the arm portion 82a is the treatment instrument raising member when the treatment instrument raising members 81 and 82 are completely raised. It is set so as not to interfere with 81. The short diameter N of the long hole 89 is set so that the raising wire 40 can be inserted and is smaller than the outer diameter of the retaining member 90. Others are the same as those in the first embodiment, and the description of the same components will be omitted.

With the above-described structure, the treatment tool raising member 8 is formed by one raising wire 40 as in the first embodiment.
By rotating 1, 82, the two treatment tools inserted in the treatment tool channel can be raised. Thereby, the distal ends of the two treatment tools can easily reach the desired positions, and various treatments can be easily performed.

Although the direct-viewing type two-channel endoscope has been described in the above embodiment, the present invention can be similarly applied to a perspective-type two-channel endoscope.

Further, not only the electronic endoscope having the solid-state image pickup device but also the optical endoscope having the image guide fiber may be used.

[0043]

As described above, according to the present invention, 2
The tip of the book treatment tool can easily reach the site to be treated, and sufficient treatment can be performed, and
There is an effect that operability can be improved without increasing the diameter of the endoscope insertion portion.

[Brief description of drawings]

1 to 11 relate to a first embodiment of the present invention, and FIG. 1 is a front view showing a configuration of a distal end of an endoscope insertion portion.

FIG. 2 is a block diagram of the entire endoscope device.

FIG. 3 is a sectional view taken along line AA in FIG.

FIG. 4 is a sectional view taken along line BB in FIG.

FIG. 5 is a sectional view taken along line CC in FIG.

FIG. 6 is an explanatory cross-sectional view showing a mounting portion of a raising wire for performing a treatment instrument raising operation.

FIG. 7 is a perspective view showing a configuration of an endoscope operation section.

FIG. 8 is an explanatory diagram of a treatment instrument channel tube.

FIG. 9 is an explanatory cross-sectional view showing the configuration of the distal end side connection portion of the treatment instrument channel tube.

10 (a) is a cross-sectional view taken along the line AA, and FIG. 10 (b) is a cross-sectional view taken along the line BB.

FIG. 11 is an explanatory diagram showing a configuration of a connector portion connected to a light source and a fluid control device.

FIG. 12 is an explanatory view showing an example in which a tube for press-fitting a fluid is provided in the endoscope insertion portion.

FIG. 13 is a cross-sectional view showing the configuration of the distal end of the endoscope insertion section according to the second embodiment of the invention.

14A and 14B are views showing a configuration of a distal end of an endoscope insertion portion according to a third embodiment of the invention, in which FIG. 14A is a sectional view and FIG. 14B is an enlarged view of an arm portion of a treatment instrument raising member. Explanatory drawing shown, (c) is sectional explanatory drawing which shows the relationship between the arm part and the raising wire of a treatment tool raising member.

[Explanation of symbols]

 DESCRIPTION OF SYMBOLS 1 ... Endoscope 9 ... Insertion part 10 ... Tip part 24,25 ... Treatment tool channel opening part 26 ... Storage room 27 ... Treatment tool raising member 28,29 ... Treatment tool channel 30 ... Tip component member 38 ... Rotation shaft 40 ... Raising wires 44, 45 ... Grooves

Claims (1)

[Claims] 1. An elongated insertion section having a plurality of treatment tool channels through which a treatment tool can be inserted, and a distal end portion of the insertion section, which communicates with the plurality of treatment tool channels and at least a part of which is exposed to the outside. A storage chamber portion that opens, a treatment instrument raising member that is provided in the storage chamber portion and raises the treatment instrument that has been inserted into the treatment instrument channel, and one end of the treatment instrument raising member is connected to the treatment instrument raising member. A raising wire for raising a plurality of treatment instruments inserted in the treatment instrument channel by rotating the treatment instrument raising member by advancing and retracting the treatment instrument raising member by inserting the treatment instrument raising member into the operation unit on the other side. An endoscope comprising: