CN215960047U

CN215960047U - Operation device, composite operation channel and multi-degree-of-freedom positioning structure

Info

Publication number: CN215960047U
Application number: CN202122082275.2U
Authority: CN
Inventors: 郭毅军; 郭以宏
Original assignee: Chongqing Xishan Science and Technology Co Ltd
Current assignee: Chongqing Xishan Science and Technology Co Ltd
Priority date: 2021-08-31
Filing date: 2021-08-31
Publication date: 2022-03-08
Anticipated expiration: 2031-08-31

Abstract

The utility model relates to a surgical device, a composite operation channel and a multi-degree-of-freedom positioning structure. Taking the degree of freedom of the guide rod of the cutter as an example: the degree of freedom 1 is used for applying acting force to the guide rod of the cutter so that the guide rod of the cutter moves up and down along the axis direction of the second through hole to adjust the position of the cutter; the degree of freedom 2 is used for enabling the cutter bar of the cutter to rotate in the second through hole to adjust the position of the grinding part of the cutter; and 3, the position of the grinding part of the cutter is adjusted by swinging the cutter rod of the cutter left and right or back and forth in the second through hole. Therefore, the endoscope and the cutter can be arranged in the same operation channel, the positions of the endoscope and the cutter can be flexibly adjusted with multiple degrees of freedom, the requirement of an operation is met, namely, only one operation channel needs to be arranged in an operation area, the operation wound can be reduced, and the operation implementation difficulty is reduced.

Description

Operation device, composite operation channel and multi-degree-of-freedom positioning structure

Technical Field

The utility model relates to the technical field of medical instruments, in particular to a surgical device, a composite operation channel and a multi-degree-of-freedom positioning structure.

Background

In traditional minimally invasive surgery or bone surgery such as spine, arthroscope, joint replacement bone, laparoscope and the like, a single operation channel is usually adopted as a practically applied surgical device, and the single operation channel can only allow a single cutter (also called a grinding head) or an endoscope (also called an endoscope) to enter and does not have the capability of multi-degree-of-freedom adjustment. When a plurality of instruments such as a cutter, an endoscope and the like are required to be matched with each other and used simultaneously, at least two operation channels are required to be arranged in an operation area of a human body from different directions, so that at least two single operation channels can be correspondingly arranged in the at least two operation channels one by one to meet operation conditions. However, the surgical channels are respectively established from different areas, so that the trauma of the surgery to the patient is larger, the recovery of the patient is difficult, the surgical implementation difficulty is larger, and the professional degree of a surgical operator is required to be high.

SUMMERY OF THE UTILITY MODEL

Based on this, it is necessary to overcome the defects of the prior art, and provide a surgical device, a composite operation channel and a multi-degree-of-freedom positioning structure, which can reduce the surgical trauma and the surgical implementation difficulty.

The technical scheme is as follows: a multiple degree of freedom positioning structure for positioning a shaft of a surgical instrument, the multiple degree of freedom positioning structure comprising: the supporting assembly is provided with two first through holes at intervals, and a first mounting position is arranged on the inner wall of each first through hole in a surrounding manner; two first supporter, two first supporter is rotatable respectively and/or can swing set up in two first installation position, be equipped with the second through-hole on the first supporter, the pore wall of second through-hole is used for the centre gripping the action bars.

When the multi-degree-of-freedom positioning structure is used, the endoscope rod of the endoscope is inserted into the second through hole of one of the first supporting bodies, the cutter rod of the cutter is inserted into the second through hole of the other first supporting body, and then the following degrees of freedom can be adjusted, taking the degree of freedom of the guide rod of the cutter as an example: the degree of freedom 1 is used for applying acting force to the guide rod of the cutter so that the guide rod of the cutter moves up and down along the axis direction of the second through hole to adjust the position of the cutter; the degree of freedom 2 is used for enabling the cutter bar of the cutter to rotate in the second through hole to adjust the position of the grinding part of the cutter; and 3, the position of the grinding part of the cutter is adjusted by swinging the cutter rod of the cutter left and right or back and forth in the second through hole. Therefore, the endoscope and the cutter can be arranged in the same operation channel, the positions of the endoscope and the cutter can be flexibly adjusted with multiple degrees of freedom, the requirement of an operation is met, namely, only one operation channel needs to be arranged in an operation area, the operation wound can be reduced, and the operation implementation difficulty is reduced.

In one embodiment, the first mounting position is a first concave portion arranged around the inner wall of the first through hole, and a first elastic support ring is arranged around the outer wall of the first support body and tightly abutted against the inner wall of the first concave portion;

or, the first mounting position is a first convex portion arranged on the inner wall of the first through hole in a surrounding manner, the first concave portion is arranged on the outer wall of the first supporting body in a surrounding manner, the first convex portion is an elastic convex portion, and the first convex portion is tightly abutted against the inner wall of the first concave portion;

or, the first installation position is a first convex part arranged on the inner wall of the first through hole in a surrounding manner, a first elastic support ring is arranged on the outer wall of the first support body in a surrounding manner, a first concave part matched with the first convex part is arranged on the outer wall of the first elastic support ring, and the first convex part is tightly abutted against the inner wall of the first concave part.

In one embodiment, the first through hole includes a first tapered hole section with a gradually decreasing aperture along an axial direction of the first through hole, a larger aperture end of the first tapered hole section is closer to the top surface of the support component than a smaller aperture end of the first tapered hole section, and the first recess is correspondingly disposed on a hole wall of the first tapered hole section.

In one embodiment, at least one damping sealing ring is arranged on the hole wall of the second through hole and used for tightly abutting and positioning the operating rod.

In one embodiment, the support assembly comprises a fixed support block and a second support body; the fixed supporting block is provided with a third through hole, a second mounting position is arranged on the inner wall of the third through hole in an encircling mode, the second supporting body is rotatably and/or swingably arranged on the second mounting position, and the two first through holes are arranged on the second supporting body at intervals.

In one embodiment, the second mounting position is a second concave portion arranged on the inner wall of the third through hole in a surrounding manner; the inner wall of the second concave part is an arc-shaped surface; and a second elastic support ring is arranged on the outer wall of the second support body in a surrounding manner and is tightly abutted against the inner wall of the second concave part.

In one embodiment, the third through hole includes a second tapered hole section, the aperture of which is gradually reduced along the axial direction of the third through hole, the larger aperture end of the second tapered hole section is closer to the top surface of the support component than the smaller aperture end, and the second recess is correspondingly disposed on the hole wall of the second tapered hole section.

A composite operating channel, comprising: the multi-degree-of-freedom positioning structure further comprises a channel pipe assembly, a fixed supporting block of the supporting assembly is connected with the channel pipe assembly, an inner channel of the channel pipe assembly is arranged corresponding to a second supporting body of the supporting assembly, and the inner channel can be used for inserting an endoscope and a cutter.

When the compound operation channel is used, the endoscope rod of the endoscope is inserted into the second through hole arranged on one of the first supporting bodies, the cutter rod of the cutter is inserted into the second through hole arranged on the other first supporting body, and then the following degrees of freedom can be adjusted, taking the degree of freedom of the guide rod of the cutter as an example: the degree of freedom 1 is used for applying acting force to the guide rod of the cutter so that the guide rod of the cutter moves up and down along the axis direction of the second through hole to adjust the position of the cutter; the degree of freedom 2 is used for enabling the cutter bar of the cutter to rotate in the second through hole to adjust the position of the grinding part of the cutter; and 3, the position of the grinding part of the cutter is adjusted by swinging the cutter rod of the cutter left and right or back and forth in the second through hole. Therefore, the endoscope and the cutter can be arranged in the same operation channel, the positions of the endoscope and the cutter can be flexibly adjusted with multiple degrees of freedom, the requirement of an operation is met, namely, only one operation channel needs to be arranged in an operation area, the operation wound can be reduced, and the operation implementation difficulty is reduced.

In one embodiment, the compound operation channel further comprises a water injection valve and a suction valve disposed on the fixed support block; a water injection channel and a suction channel are arranged on the fixed supporting block; the channel pipe assembly comprises a first channel pipe, a second channel pipe, a third channel pipe, a first sealing ring and a second sealing ring; the first channel pipe, the second channel pipe and the third channel pipe are sequentially nested from inside to outside, and one end of the first channel pipe, one end of the second channel pipe and one end of the third channel pipe are all arranged at the bottom of the fixed supporting block; the first channel pipe and the second channel pipe form a water injection cavity at intervals, the first sealing ring is arranged between the other end of the first channel pipe and the inner wall of the second channel pipe, the inner channel is a channel of the first channel pipe, and a plurality of first water through holes communicated between the water injection cavity and the inner channel are formed in the pipe wall of the first channel pipe; the second channel pipe and the third channel pipe form a suction chamber at intervals, the second sealing ring is arranged between the other end of the third channel pipe and the inner wall of the second channel pipe, and a plurality of second water through holes are formed in the pipe wall of the third channel pipe; one end of the water injection channel is communicated with the water injection valve, and the other end of the water injection channel is communicated with the water injection cavity; one end of the suction passage is communicated with the suction valve, and the other end of the suction passage is communicated with the suction chamber.

In one embodiment, the bottom of the fixed supporting block is provided with a first enclosing plate, a second enclosing plate and a third enclosing plate which are sequentially sleeved from inside to outside; the first enclosing plate is detachably connected with one end of the first channel pipe in a sleeved mode; the second enclosing plate is detachably connected with one end of the second channel pipe in a sleeved mode; the third enclosing plate is detachably connected with one end of the third channel pipe in a sleeved mode.

In one embodiment, the first water through hole is obliquely arranged on the pipe wall of the first channel pipe, and the water outlet side of the first water through hole is far away from the fixed supporting block relative to the water inlet side of the first water through hole.

In one embodiment, the other end of the second channel pipe extends out of the first channel pipe and the third channel pipe, and a plurality of spaced gaps are arranged on the other end of the second channel pipe.

In one embodiment, the compound operating channel further comprises a pressurization valve; the channel pipe assembly further comprises an inflatable sheath, the inflatable sheath is sleeved outside the third channel pipe and provided with a closed chamber, an inflation channel is arranged on the fixed supporting block, the pressurization valve is arranged on the fixed supporting block and communicated with one end of the inflation channel, and the other end of the inflation channel is communicated with the closed chamber.

In one embodiment, the outer wall of the inflatable sheath is provided with a non-slip part; the inflatable sheath is an elastic sleeve.

In one embodiment, a positioning portion is arranged on the inner wall of the inflatable sheath, a positioning groove adapted to the positioning portion is arranged on the outer wall of the third channel pipe, and the positioning portion is arranged in the positioning groove.

A surgical device comprises the composite operation channel, and further comprises an endoscope and a cutter, wherein the endoscope is arranged in the second through hole of one of the first supporting bodies, and the cutter is arranged in the second through hole of the other first supporting body.

When the surgical device is used, the endoscope rod of the endoscope is inserted into the second through hole of one of the first supports, the cutter rod of the cutter is inserted into the second through hole of the other first support, and then the following degrees of freedom can be adjusted, taking the degree of freedom of the guide rod of the cutter as an example: the degree of freedom 1 is used for applying acting force to the guide rod of the cutter so that the guide rod of the cutter moves up and down along the axis direction of the second through hole to adjust the position of the cutter; the degree of freedom 2 is used for enabling the cutter bar of the cutter to rotate in the second through hole to adjust the position of the grinding part of the cutter; and 3, the position of the grinding part of the cutter is adjusted by swinging the cutter rod of the cutter left and right or back and forth in the second through hole. Therefore, the endoscope and the cutter can be arranged in the same operation channel, the positions of the endoscope and the cutter can be flexibly adjusted with multiple degrees of freedom, the requirement of an operation is met, namely, only one operation channel needs to be arranged in an operation area, the operation wound can be reduced, and the operation implementation difficulty is reduced.

Drawings

The accompanying drawings, which are incorporated in and constitute a part of this application, illustrate embodiments of the utility model and, together with the description, serve to explain the utility model and not to limit the utility model.

In order to more clearly illustrate the technical solutions in the embodiments of the present invention, the drawings needed to be used in the description of the embodiments will be briefly introduced below, and it is obvious that the drawings in the following description are only some embodiments of the present invention, and it is obvious for those skilled in the art to obtain other drawings based on these drawings without creative efforts.

FIG. 1 is a schematic view of a surgical device according to an embodiment of the present invention;

FIG. 2 is a schematic view of the surgical device of one embodiment of the present invention in an operative position in the surgical tunnel;

FIG. 3 is an exploded view of a surgical device according to one embodiment of the present invention;

FIG. 4 is a schematic structural diagram of a multi-degree-of-freedom positioning structure according to an embodiment of the present invention;

FIG. 5 is a cross-sectional view of a multi-degree-of-freedom positioning structure in accordance with an embodiment of the present invention;

FIG. 6 is an exploded view of a multi-degree-of-freedom positioning structure in accordance with an embodiment of the present invention;

FIG. 7 is a schematic view of a supporting assembly according to an embodiment of the present invention;

FIG. 8 is a schematic view of another embodiment of a support assembly;

FIG. 9 is a cross-sectional structural view of a support assembly in accordance with an embodiment of the present invention;

FIG. 10 is a schematic structural diagram of a second supporting body according to an embodiment of the present invention;

FIG. 11 is a cross-sectional view of a second support according to an embodiment of the present invention;

FIG. 12 is a schematic structural diagram of a first supporting body according to an embodiment of the utility model;

FIG. 13 is a cross-sectional view of a first supporting body according to an embodiment of the present invention;

FIG. 14 is a schematic view of a channel tube assembly mounted on a fixed support block according to an embodiment of the present invention;

FIG. 15 is an enlarged schematic view of FIG. 14 at A;

FIG. 16 is an enlarged schematic view of FIG. 14 at B;

FIG. 17 is a schematic structural view of a first channel tube according to an embodiment of the present invention;

FIG. 18 is a schematic structural diagram of a second channel tube according to an embodiment of the present invention;

FIG. 19 is a schematic structural view of a third channel tube according to an embodiment of the present invention;

FIG. 20 is a schematic view of an inflatable sheath according to an embodiment of the utility model;

FIG. 21 is a cross-sectional structural view of an inflatable sheath according to an embodiment of the utility model.

10. A support assembly; 11. fixing a supporting block; 111. a third through hole; 1111. a second mounting location; 1112. a second tapered bore section; 112. a water injection channel; 113. a suction channel; 114. a first enclosing plate; 115. a second enclosing plate; 116. a third coaming; 12. a second support; 121. a first through hole; 1211. a first mounting location; 1212. a first tapered bore section; 122. a second elastic support ring; 123. a third mounting groove; 20. a first support; 21. a second through hole; 22. a first elastic support ring; 23. a first mounting groove; 24. a damping seal ring; 25. a second mounting groove; 30. an endoscope; 31. a lens; 40. a cutter; 41. a grinding section; 50. a channel tube assembly; 51. a first passage tube; 511. a first water through hole; 52. a second channel pipe; 521. opening the gap; 53. a third channel tube; 531. a second water through hole; 532. positioning a groove; 54. a first seal ring; 55. a second seal ring; 56. a water injection chamber; 57. a suction chamber; 58. an inflatable sheath; 581. closing the chamber; 582. a first protrusion; 583. a second protrusion; 59. a fourth seal ring; 60. a water injection valve; 70. a suction valve; 80. a pressurization valve; 90. human tissue; 91. and (4) performing an operation channel.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein.

Referring to fig. 1 to 5, fig. 1 is a schematic structural diagram illustrating a surgical device according to an embodiment of the present invention, fig. 2 is a schematic structural diagram illustrating a working state of the surgical device according to an embodiment of the present invention when the surgical device enters an operation channel 91, fig. 3 is an exploded structural diagram illustrating the surgical device according to an embodiment of the present invention, fig. 4 is a schematic structural diagram illustrating a multiple degree of freedom positioning structure according to an embodiment of the present invention, and fig. 5 is a schematic cross-sectional diagram illustrating the multiple degree of freedom positioning structure according to an embodiment of the present invention. The multi-degree-of-freedom positioning structure provided by the embodiment of the utility model is used for positioning an operating rod of a surgical instrument, and comprises: the support assembly 10 and two first supports 20. The supporting component 10 is provided with two spaced first through holes 121, and a first installation position 1211 is circumferentially arranged on the inner wall of each first through hole 121. The two first supporting bodies 20 are respectively rotatably and/or swingably disposed at the two first mounting positions 1211, the first supporting body 20 is provided with a second through hole 21, and a hole wall of the second through hole 21 is used for clamping the operating rod.

When the first support body 20 is used to mount the endoscope 30 (as shown in fig. 1 to 4), the operation lever is specifically a scope lever of the endoscope 30. When the first support 20 is used for mounting a tool 40 (as shown in fig. 1 to 4), the operating rod is specifically a shank of the tool 40.

Specifically, the second through hole 21 of one of the first supports 20 is used for inserting a scope shaft provided with the endoscope 30, and the second through hole 21 of the other first support 20 is used for inserting a tool bar provided with the tool 40.

Referring to fig. 1, 2 and 5, in use, the shaft of the endoscope 30 is inserted into the second through hole 21 of one of the first supports 20, and the shaft of the cutter 40 is inserted into the second through hole 21 of the other first support 20, and then the following degrees of freedom can be adjusted, taking the degree of freedom of the guide rod of the cutter 40 as an example: degree of freedom 1 (direction S1 shown in fig. 2), applying a force to the guide rod of the cutter 40, so that the guide rod of the cutter 40 moves up and down along the axial direction of the second through hole 21 to adjust the position of the cutter 40; a degree of freedom 2 (S2 direction shown in fig. 2) for adjusting the position of the grinding portion 41 of the tool 40 by rotating the holder of the tool 40 in the second through hole 21; the degree of freedom 3 (direction S3 shown in fig. 2) adjusts the position of the grinding portion 41 of the tool 40 by swinging the shank of the tool 40 in the second through hole 21 in the left-right direction or the front-back direction. Therefore, the endoscope 30 and the cutter 40 can be arranged in the same operation channel, the positions of the endoscope 30 and the cutter 40 can be flexibly adjusted in multiple degrees of freedom, the requirement of an operation is met, namely, only one operation channel 91 needs to be arranged in an operation area, the operation wound can be reduced, and the operation implementation difficulty is reduced.

In one embodiment, the first mounting location 1211 is a first recess disposed around an inner wall of the first through hole 121. The inner wall of the first concave part is an arc-shaped surface. A first elastic support ring 22 is disposed around the outer wall of the first support body 20, and the first elastic support ring 22 tightly contacts with the inner wall of the first concave portion. Thus, on the one hand, in the case where the first elastic support ring 22 is in close contact with the inner wall of the first concave portion, the inner wall of the first concave portion can support and fix the first support body 20, while the sealing property at the contact position of the two can be ensured; on the other hand, the first elastic supporting ring 22 is in close contact with the inner wall of the first concave portion, so that the first supporting body 20 is driven by an external force, the first elastic supporting ring 22 is forced to deform to enable the first supporting body 20 to move freely at the first installation position 1211, and when the first supporting body 20 moves freely, the operating rod installed on the first supporting body 20 is correspondingly driven to adjust the position.

It should be noted that the "first elastic support ring 22" may be "a part of the first support body 20", that is, the "first elastic support ring 22" and "the other part of the first support body 20" are integrally formed; or a separate member which can be separated from the other parts of the first support body 20, i.e., the first elastic support ring 22 can be manufactured separately and then combined with the other parts of the first support body 20 into a whole. Referring to fig. 5, 10 and 11, in an embodiment, a first mounting groove 23 is formed on an outer wall of the first supporting body 20, and the first elastic supporting ring 22 is disposed in the first mounting groove 23.

It should be noted that, as an alternative, the first mounting location 1211 is not a first concave portion as in the above embodiment, and the first mounting location 1211 may be a first convex portion disposed around the inner wall of the first through hole 121; the outer wall of the first convex part is an arc-shaped surface; when the first concave portion is circumferentially disposed on the outer wall of the first supporting body 20, the first convex portion is specifically, for example, an elastic convex portion, and the first convex portion can tightly abut against the inner wall of the first concave portion without disposing the first elastic supporting ring 22 on the first supporting body 20. When the first elastic support ring 22 is disposed on the first support body 20, the first concave portion is further disposed on the first elastic support ring 22, for example, in a surrounding manner, the first convex portion does not need to be disposed as an elastic convex portion, and the first convex portion tightly abuts against an inner wall of the first concave portion.

In addition, it can be understood that, in order to realize that the first supporting body 20 can freely rotate in the first through hole 121 in 360 degrees, the surfaces of the cross section perpendicular to the axial direction of the first through hole 121, which are tangent to the inner wall of the first concave portion, are all circular surfaces, and the first elastic supporting ring 22 is a circular elastic supporting ring.

Referring to fig. 5, 10 and 11, in an embodiment, the first through hole 121 includes a first tapered hole section 1212 whose hole diameter gradually decreases along an axial direction of the first through hole 121, a larger hole diameter end of the first tapered hole section 1212 is closer to the top surface of the support assembly 10 than a smaller hole diameter end, and the first concave portion is correspondingly disposed on a hole wall of the first tapered hole section 1212. In this manner, for example, the inward loading of the first support body 20 from the larger bore end of the first tapered bore section 1212 facilitates the loading of the first resilient support ring 22 of the first support body 20 into position; in addition, the aperture of the smaller end of the aperture of the first tapered hole section 1212 is smaller, and the aperture wall of the first tapered hole section 1212 has a better supporting effect on the first elastic supporting ring 22, so as to prevent the first supporting body 20 from falling off the supporting assembly 10, and meanwhile, the contact sealing performance between the first elastic supporting ring 22 and the inner wall of the first concave portion is ensured.

The top surface of the support unit 10 refers to a surface of the support unit 10 facing away from the lens 31 of the endoscope 30 or the ground portion 41 of the tool 40 after the multi-degree-of-freedom positioning structure is incorporated into the endoscope 30 and the tool 40; the bottom surface of the support assembly 10 refers to a surface of the support assembly 10 facing the lens 31 of the endoscope 30 or the ground portion 41 of the cutter 40, respectively.

Referring to fig. 5, 6, 12 and 13, in one embodiment, the wall of the second through hole 21 does not directly and tightly abut against the operating rod, but indirectly and tightly abuts against the operating rod, for example. At least one damping sealing ring 24 is arranged on the hole wall of the second through hole 21. The damping seal 24 is used to tightly abut against the positioning lever. Specifically, a second mounting groove 25 adapted to the damping gasket 24 is provided on the hole wall of the second through hole 21, and the damping gasket 24 is disposed in the second mounting groove 25. Thus, when the damping seal ring 24 is tightly abutted against the outer wall of the operation rod, on one hand, good sealing performance between the operation rod and the hole wall of the second through hole 21 can be ensured, and on the other hand, a friction force exists between the damping seal ring 24 and the outer wall of the operation rod, and the friction force can overcome the gravity of the endoscope 30 or the cutter 40 to enable the endoscope 30 or the cutter 40 to be stably installed on the first support body 20, so that the endoscope 30 or the cutter 40 can be driven to move along the degree of freedom 2 when an acting force in the axial direction of the second through hole 21 is applied to the operation rod. In addition, it should be noted that the number of the damping sealing rings 24 may be, for example, one, two, three or other numbers, and the number of the second mounting grooves 25 on the hole wall of the second through hole 21 is, for example, one, two, three or other numbers, which is not limited herein, and may be specifically designed according to the weight of the endoscope 30 or the cutter 40.

Referring to fig. 5 to 7 and 9 to 11, in one embodiment, the supporting assembly 10 includes a fixed supporting block 11 and a second supporting body 12. The fixed supporting block 11 is provided with a third through hole 111, a second mounting position 1111 is arranged on the inner wall of the third through hole 111 in an encircling manner, the second supporting body 12 is rotatably and/or swingably arranged at the second mounting position 1111, and the two first through holes 121 are arranged on the second supporting body 12 at intervals. In this way, during use, not only the first support 20 freely moves relative to the first recess to adjust the degrees of freedom 2 and 3, but also the second support 12 can be driven to freely move in the second recess to adjust the degrees of freedom 2 and 3, so that the flexibility of adjusting the degrees of freedom is stronger, and the adjustment range of the degrees of freedom 2 and 3 can be increased when the positions of the first support 20 and the second support 12 are synchronously adjusted.

It should be noted that, referring to fig. 4 and fig. 5, an included angle a between a center line of the second supporting body 12 (i.e., a straight line perpendicular to the top surface of the second supporting body 12) and the top surface of the fixed supporting block 11 is a, when the second supporting body 12 is not adjusted in a swinging manner, a is 90 °, and when the second supporting body 12 is driven to freely move in the second concave portion so that the second supporting body 12 is adjusted in a swinging manner, a is changed according to a position of the second supporting body 12, a specific adjustment range is determined according to the included angle corresponding to the arc-shaped surface of the second concave portion, and in a general case, the adjustment range of a is designed to be, for example, 70 ° to 110 °. Further, the center line of one of the first supporting bodies 20 (i.e., a line perpendicular to the top surface of the first supporting body 20) has an angle b with respect to the top surface of the fixed supporting block 11, and the center line of the other first supporting body 20 (i.e., a line perpendicular to the top surface of the first supporting body 20) has an angle c with respect to the top surface of the fixed supporting block 11. The included angle b and the included angle c can be the same or different and can be set according to actual conditions. Taking one of the first supporting bodies 20 as an example to describe the adjustment of the included angle b, when the first supporting body 20 is not adjusted in a swinging manner, b is 90 °, and when the first supporting body 20 is driven to freely move in the first concave portion so that the first supporting body 20 is adjusted in a swinging manner, b is correspondingly changed according to the position of the first supporting body 20, the specific adjustment range is determined according to the included angle corresponding to the arc-shaped surface of the first concave portion, and in a normal case, the adjustment range of b is designed to be, for example, 60 ° to 120 °. The adjustment of the angle c is similar to the angle b, and is not described herein again.

Referring to fig. 5 to 7 and 9 to 11, in an embodiment, the second mounting portion 1111 is a second recess disposed around an inner wall of the third through hole 111. The inner wall of the second concave part is an arc-shaped surface. A second elastic support ring 122 is disposed around the outer wall of the second support body 12, and the second elastic support ring 122 tightly contacts with the inner wall of the second recess. Thus, on the one hand, under the condition that the second elastic support ring 122 is in close contact with the inner wall of the second concave portion, the inner wall of the second concave portion can support and fix the second support body 12, and meanwhile, the sealing performance at the contact position of the second elastic support ring and the inner wall of the second concave portion can be ensured; on the other hand, the second elastic supporting ring 122 is in close contact with the inner wall of the second recess, so that the second supporting body 12 is driven by an external force, the second elastic supporting ring 122 is deformed by a stress, the second supporting body 12 can move freely at the second mounting position 1111, and when the second supporting body 12 moves freely, the operating rod mounted on the first supporting body 20 is correspondingly driven to adjust the position.

As an example, the first elastic support ring 22 and the second elastic support ring 122 are made of, for example, a polymer elastic material, including but not limited to polyvinyl fluoride, polyvinylidene fluoride, etc., and may be disposed according to practical situations. The self-lubricating rubber has good self-lubricating performance and wear resistance, can be pressed into the first concave part or the second concave part through certain pressure, and can slide in the arc surface under the action of elastic force to have certain damping, so that better sealing performance can be ensured.

It should be noted that the "second elastic support ring 122" may be a "part of the second support body 12", that is, the "second elastic support ring 122" and the "other part of the second support body 12" are integrally formed; the second elastic support ring 122 may be made separately from the other parts of the second support body 12 and combined with the other parts of the second support body 12 to form a whole. In one embodiment, a third mounting groove 123 is formed on an outer wall of the second supporting body 12, and the second elastic supporting ring 122 is disposed in the third mounting groove 123.

It should also be noted that, as an alternative, the second mounting location 1111 is not a second recess as in the above embodiment, and the second mounting location 1111 may be a second elastic protrusion disposed around the inner wall of the third through hole 111; the outer wall of the second elastic convex part is an arc-shaped surface; the second concave portion is circumferentially disposed on the outer wall of the second supporting body 12, and the second elastic protrusion is tightly abutted against the inner wall of the second concave portion.

In addition, it can be understood that, in order to realize that the second supporting body 12 can freely rotate in the second through hole 21 in 360 degrees, the surfaces of the cross section perpendicular to the axial direction of the second through hole 21 and tangent to the inner wall of the second concave portion are all circular surfaces, and the second elastic supporting ring 122 is a circular elastic supporting ring.

Referring to fig. 5 to 7 and 9 to 11, in an embodiment, the third through hole 111 includes a second tapered hole section 1112 with a gradually decreasing hole diameter along an axial direction of the third through hole 111, a larger hole diameter end of the second tapered hole section 1112 is closer to the top surface of the support assembly 10 than a smaller hole diameter end, and a second concave portion is correspondingly disposed on a hole wall of the second tapered hole section 1112. In this manner, for example, loading the second support body 12 inwardly from the larger bore end of the second tapered bore section 1112 can facilitate loading the second resilient support ring 122 of the second support body 12 into position; in addition, the aperture of the smaller end of the second tapered hole section 1112 is smaller, and the hole wall of the second tapered hole section 1112 plays a better supporting role for the second elastic support ring 122, so as to prevent the second support body 12 from falling off the support assembly 10, and meanwhile, the contact sealing performance between the second elastic support ring 122 and the inner wall of the second concave portion is ensured.

Referring to fig. 1 to 5 and 14 to 16, in one embodiment, a composite operation channel includes: the multiple degree of freedom positioning structure of any of the above embodiments, further comprising a channel tube assembly 50. The fixed support block 11 of the support assembly 10 is connected to the channel tube assembly 50, and the inner channel of the channel tube assembly 50, which is capable of being used for inserting the endoscope 30 and the cutter 40, is disposed corresponding to the second support body 12 of the support assembly 10.

In use, the above-mentioned composite operation channel is configured such that the shaft of the endoscope 30 is inserted into the second through hole 21 of one of the first supports 20 and the shaft of the cutter 40 is inserted into the second through hole 21 of the other first support 20, and then the following degrees of freedom are adjusted, taking the degree of freedom of the guide rod of the cutter 40 as an example: degree of freedom 1 (direction S1 shown in fig. 2), applying a force to the guide rod of the cutter 40, so that the guide rod of the cutter 40 moves up and down along the axial direction of the second through hole 21 to adjust the position of the cutter 40; a degree of freedom 2 (S2 direction shown in fig. 2) for adjusting the position of the grinding portion 41 of the tool 40 by rotating the holder of the tool 40 in the second through hole 21; the degree of freedom 3 (direction S3 shown in fig. 2) adjusts the position of the grinding portion 41 of the tool 40 by swinging the shank of the tool 40 in the second through hole 21 in the left-right direction or the front-back direction. Therefore, the endoscope 30 and the cutter 40 can be arranged in the same operation channel, the positions of the endoscope 30 and the cutter 40 can be flexibly adjusted in multiple degrees of freedom, the requirement of an operation is met, namely, only one operation channel 91 needs to be arranged in an operation area, the operation wound can be reduced, and the operation implementation difficulty is reduced.

Referring to fig. 14 to 16, in one embodiment, the compound operation passage further includes a water injection valve 60 and a suction valve 70 provided on the fixed support block 11. The fixed support block 11 is provided with a water injection passage 112 and a suction passage 113. The passage pipe assembly 50 includes a first passage pipe 51, a second passage pipe 52, a third passage pipe 53, a first seal ring 54, and a second seal ring 55. The first channel pipe 51, the second channel pipe 52 and the third channel pipe 53 are sequentially nested from inside to outside, and one end of the first channel pipe 51, one end of the second channel pipe 52 and one end of the third channel pipe 53 are all arranged at the bottom of the fixed supporting block 11. The first passage pipe 51 and the second passage pipe 52 form a water injection chamber 56 at an interval, and the first sealing ring 54 is disposed between the other end of the first passage pipe 51 and the inner wall of the second passage pipe 52, thereby ensuring the sealing performance of the water injection chamber 56. The inner channel is a channel of the first channel pipe 51, and a plurality of first water through holes 511 which are communicated between the water injection chamber 56 and the inner channel are arranged on the pipe wall of the first channel pipe 51, that is, the cooling liquid in the water injection chamber 56 is output to the operation area through the plurality of first water through holes 511.

In addition, the second passage pipe 52 and the third passage pipe 53 are spaced to form a suction chamber 57, and a second seal ring 55 is disposed between the other end of the third passage pipe 53 and the inner wall of the second passage pipe 52 to ensure the sealing property of the suction chamber 57. The tube wall of the third channel tube 53 is provided with a plurality of second water through holes 531, that is, the liquid in the region outside the outer wall of the third channel tube 53 enters the suction chamber 57 through the plurality of second water through holes 531 under the action of the suction pump.

In addition, one end of the water filling passage 112 communicates with the water filling valve 60, and the other end of the water filling passage 112 communicates with the water filling chamber 56. One end of the suction passage 113 communicates with the suction valve 70, and the other end of the suction passage 113 communicates with the suction chamber 57. Thus, during operation, the cooling fluid is injected into the water injection chamber 56 through the water injection valve 60 and the water injection channel 112, and enters the inner channel of the first channel pipe 51 through the plurality of first water through holes 511, so as to flush and cool the operation area, and circulates upwards along the notch 521 at the bottom of the pipe wall of the second channel pipe 52 to enter the middle upper area of the pipe wall of the third channel pipe 53, enters the suction chamber 57 from the outer side of the third channel pipe 53 through the second water through holes 531, and is then pumped outwards through the suction channel 113 and the channel connection suction pipe of the suction valve 70. Through adopting above-mentioned structure, make water injection, suction coolant liquid form inherent flow direction circulation to can make the mixed blood water that thoughtlessly has blood among the operation process and the mixed liquid of tissue in time take out the operation district, make and keep clean, clear operation field of vision under the 30 fields of vision of endoscope all the time, promote the visual degree among the doctor operation process, and reduce the doctor and adjust the loaded down with trivial details step that coolant liquid, water injection washed, and suction, promote operation efficiency and doctor's experience and feel.

Referring to fig. 8, 9 and 16, in one embodiment, a first enclosing plate 114, a second enclosing plate 115 and a third enclosing plate 116 are sequentially sleeved on the bottom of the fixed supporting block 11 from inside to outside. The first shroud 114 is detachably fitted to one end of the first passage tube 51. The second shroud 115 is removably received in one end of the second channel tube 52. The third surrounding plate 116 is detachably connected to one end of the third channel tube 53 in a sleeved manner.

Taking the fixed support block 11 and the first enclosing plate 114, the first enclosing plate 114 and the first channel tube 51 as examples for illustration, the "first enclosing plate 114" may be a part of the fixed support block 11, that is, the "first enclosing plate 114" and the "other part of the fixed support block 11" are integrally formed; or a separate member which can be separated from the rest of the fixed support block 11, i.e., the first enclosing plate 114, can be manufactured separately and then combined with the rest of the fixed support block 11 into a whole. In one embodiment, the "first enclosure plate 114" is a part of the "fixed support block 11" that is integrally formed. In addition, the "first passage tube 51" may be a "part of the first enclosing plate 114", that is, the "first passage tube 51" is integrally manufactured with "the other part of the first enclosing plate 114"; the "first passage pipe 51" may be manufactured separately from the "other portion of the first enclosing plate 114" and may be combined with the "other portion of the first enclosing plate 114" as a single body.

Referring to fig. 8, 9 and 16, in one embodiment, the first enclosing plate 114 is provided with a first thread on an outer wall thereof, and the first passage pipe 51 is provided with a thread corresponding to the first thread on an inner wall thereof. The outer wall of the second enclosing plate 115 is provided with a second thread, and the inner wall of one end of the second channel pipe 52 is provided with a thread adapted to the second thread. The outer wall of the third enclosing plate 116 is provided with a third thread, and the inner wall of one end of the third channel pipe 53 is provided with a thread adapted to the third thread. So, first passageway pipe 51 links to each other with first bounding wall 114 through the mode that sets up the screw thread, and the dismouting is comparatively convenient, and first passageway pipe 51 can also link to each other with first bounding wall 114 through modes such as joint, bonding, does not prescribe a limit here, and it can to set up according to actual demand. The second channel tube 52 and the second enclosing plate 115, and the third channel tube 53 and the third enclosing plate 116 are similar to the first channel tube 51 and the first enclosing plate 114, and are not described herein again.

Further, in order to ensure the sealing performance of the abutting joint of the first passage tube 51 and the first enclosing plate 114, a fourth sealing ring 59 is installed at the abutting joint position of the first passage tube 51 and the first enclosing plate 114. The second channel tube 52 and the second enclosing plate 115, and the third channel tube 53 and the third enclosing plate 116 are similar to the first channel tube 51 and the first enclosing plate 114, and are not described herein again.

Referring to fig. 14, 15 and 17, in one embodiment, the first water passing hole 511 is obliquely disposed on the wall of the first channel tube 51, and the water outlet side of the first water passing hole 511 is farther away from the fixed support block 11 than the water inlet side of the first water passing hole 511. Specifically, the inclination angle of the first water passing holes 511 with respect to the axial direction of the first passage pipe 51 is 15 ° to 75 °. Therefore, the injected cooling liquid can directly wash the operation area after passing through the first water through hole 511.

Referring to fig. 3, 15 and 19, in one embodiment, the second water passing hole 531 is obliquely disposed on the tube wall of the third channel tube 53, and the water outlet side of the second water passing hole 531 is closer to the fixed support block 11 than the water inlet side of the second water passing hole 531. Specifically, the second water passing holes 531 are inclined at an angle of 30 ° to 60 ° with respect to the axial direction of the third passage pipe 53. In this way, the second water passing hole 531 facilitates suction of the coolant outside the wall of the surgical channel 91 and the third channel tube 53.

Further, the first water passing holes 511 are provided in a number of 2 rows arranged at regular intervals in the circumferential direction of the first passage pipe 51, and the hole diameter is, for example, 1 mm. The second water passing holes 531 are provided in a number of 3 rows arranged at regular intervals in the circumferential direction of the second passage pipe 52, and have a hole diameter of, for example, 1.5 mm. Therefore, the maximum passable flow rate of the second water passing hole 531 is more than 150% of the maximum passable flow rate of the first water passing hole 511, so that human body debris tissues and the like in the operation can be sucked and discharged better, the situation that the suction channel 113 is not smooth and cannot be discharged in time is prevented, the liquid pressure balance of the human body operation area can be ensured better, and the pressure is prevented from being suddenly increased due to unsmooth suction to cause adverse effects.

Referring to fig. 15 and 18, in an embodiment, the other end of the second channel tube 52 extends out of the first channel tube 51 and the third channel tube 53, and a plurality of spaced notches 521 are disposed on the other end of the second channel tube 52. Thus, the coolant flows through the notch 521 and then circulates to the second water passing hole 531. In addition, the notch 521 is provided to facilitate observation of the tissue around the bottom of the surgical channel 91 through the endoscope 30 during the surgical procedure.

Referring to fig. 14, 16, 20 and 21, in one embodiment, the compound operation channel further includes a pressurization valve 80. The duct assembly 50 further includes an inflatable sheath 58, the inflatable sheath 58 is sleeved outside the third duct 53, the inflatable sheath 58 is provided with a closed chamber 581, the fixed support block 11 is provided with an inflation passage (not shown), the pressurization valve 80 is arranged on the fixed support block 11 and is communicated with one end of the inflation passage, and the other end of the inflation passage is communicated with the closed chamber 581.

As an alternative, the pressurization valve 80 communicates directly with the closed chamber 581 of the inflatable sheath 58 through the trachea. Further, the water injection valve 60 directly communicates with the water injection chamber 56 through a water pipe. In addition, the suction valve 70 directly communicates with the suction chamber 57 through the suction pipe. The method is not limited herein, and may be set according to actual conditions.

Referring to fig. 14, 16, 20 and 21, further, an anti-slip portion is disposed on the outer wall of the inflatable sheath 58. Specifically, the outer wall surface of the inflatable sheath 58 is provided with at least one first protrusion 582. Further, the inflatable sheath 58 is, for example, an elastic sheath. Thus, the volume of the inflatable sheath 58 is expanded and deformed by injecting sterile gas with the atmospheric pressure more than or equal to 1.1 times or normal saline with the water pressure more than or equal to 0.11MPa into the closed space, and the first bulge 582 protruding out of the outer surface of the inflatable sheath 58 is tightly attached to the inner wall surface of the operation channel 91 of the operation area, so that the composite operation channel is firmly fixed on the human body.

In this embodiment, the inflatable sheath 58 is made of, for example, a medical grade high elasticity polymer material. In addition, other elements of the composite operation channel are also made of medical-grade materials, so that adverse effects caused in the operation process are avoided, and the safe operation is ensured.

Referring to fig. 14, 16, 20 and 21, a positioning portion is further disposed on an inner wall of the inflatable sheath 58. The outer wall of the third passage tube 53 is provided with a positioning groove 532 corresponding to the positioning portion, and the positioning portion is disposed in the positioning groove 532. In this way, the inflatable sheath 58 is stably fixed on the outer wall of the third channel tube 53, and the inflatable sheath 58 is prevented from moving along the axial direction of the third channel tube 53. Specifically, the positioning portion is, for example, a second protrusion 583 circumferentially arranged around the inner wall of the inflatable sheath 58, and the number of the second protrusions 583 is, for example, one, two, three or other numbers, which are not limited herein, and are arranged according to actual requirements. Accordingly, the number of the positioning grooves 532 corresponds to the number of the second protrusions 583, and is not limited herein.

Referring to fig. 1 to 3 again, in one embodiment, a surgical device includes the composite operation channel of any one of the above embodiments, further includes an endoscope 30 and a cutter 40, the endoscope 30 is disposed in the second through hole 21 of one of the first supports 20, and the cutter 40 is disposed in the second through hole 21 of the other first support 20.

In the above-described surgical device, when in use, the shaft of the endoscope 30 is inserted into the second through hole 21 of one of the first supports 20, and the shaft of the cutter 40 is inserted into the second through hole 21 of the other first support 20, and then the following degrees of freedom can be adjusted, taking the degree of freedom of the guide rod of the cutter 40 as an example: degree of freedom 1 (direction S1 shown in fig. 2), applying a force to the guide rod of the cutter 40, so that the guide rod of the cutter 40 moves up and down along the axial direction of the second through hole 21 to adjust the position of the cutter 40; a degree of freedom 2 (S2 direction shown in fig. 2) for adjusting the position of the grinding portion 41 of the tool 40 by rotating the holder of the tool 40 in the second through hole 21; the degree of freedom 3 (direction S3 shown in fig. 2) adjusts the position of the grinding portion 41 of the tool 40 by swinging the shank of the tool 40 in the second through hole 21 in the left-right direction or the front-back direction. The tool 40, the endoscope 30 and the second support body are integrally adjusted in the degrees of freedom 2 and 3 by driving the second support body 12 to freely move in the second concave portion, and the adjustment ranges of the degrees of freedom 2 and 3 can be increased when the positions of the first support body 20 and the second support body 12 are synchronously adjusted, so that the flexibility of adjustment of the degrees of freedom is enhanced. Therefore, the endoscope 30 and the cutter 40 can be arranged in the same operation channel, the positions of the endoscope 30 and the cutter 40 can be flexibly adjusted in multiple degrees of freedom, the requirement of an operation is met, namely, only one operation channel 91 needs to be arranged in an operation area, the operation wound can be reduced, and the operation implementation difficulty is reduced.

In a specific embodiment, the surgical device of this embodiment, when applied specifically, comprises the steps of: installing the sterilized composite operation channel in the operation channel 91 established in the operation process, injecting sterile gas or normal saline from the pressurizing valve 80 connected with the inflatable sheath 58, and expanding and deforming the inflatable sheath 58 by the air pressure or water pressure until being tightly combined and fixed in the operation channel 91; after the composite operation channel is installed and fixed in the operation channel 91, the cutter 40 and the endoscope 30 can be respectively inserted into the first through holes 121 of the two first supporting bodies 20 and are primarily fixed under the extrusion action of the damping sealing ring 24 in the second through hole 21; the water injection valve 60 is connected to the water pipe, and the suction valve 70 is connected to the suction pump. When in use, the tool 40 and the endoscope 30 are respectively provided with the adjustment of each degree of freedom from 1 degree of freedom to 3 degrees of freedom, and the free adjustment in each direction is obtained, so that the operation or the observation of any area in the channel is realized. In addition, in operation, cooling liquid is injected into the water injection chamber 56 through the water injection valve 60 and the water injection channel 112, is discharged inwards through the plurality of first water through holes 511, carries out water injection washing and cooling on the operation area, circulates upwards along the notch 521 at the bottom of the tube wall of the second channel tube 52, enters the middle upper area of the tube wall of the third channel tube 53, enters the suction chamber 57 from the outer side of the third channel tube 53 through the second water through holes 531, and is then extracted outwards through the suction channel 113 and the channel connection suction tube of the suction valve 70.

The technical features of the above embodiments can be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the above embodiments are not described, but should be considered as the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above examples only show some embodiments of the present invention, and the description thereof is more specific and detailed, but not to be construed as limiting the scope of the utility model. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

In the description of the present invention, it is to be understood that the terms "central," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," "counterclockwise," "axial," "radial," "circumferential," and the like are used in the orientations and positional relationships indicated in the drawings for convenience in describing the utility model and to simplify the description, and are not intended to indicate or imply that the referenced device or element must have a particular orientation, be constructed and operated in a particular orientation, and are not to be considered limiting of the utility model.

Furthermore, the terms "first", "second" and "first" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include at least one such feature. In the description of the present invention, "a plurality" means at least two, e.g., two, three, etc., unless specifically limited otherwise.

In the present invention, unless otherwise expressly stated or limited, the terms "mounted," "connected," "secured," and the like are to be construed broadly and can, for example, be fixedly connected, detachably connected, or integrally formed; can be mechanically or electrically connected; they may be directly connected or indirectly connected through intervening media, or they may be connected internally or in any other suitable relationship, unless expressly stated otherwise. The specific meanings of the above terms in the present invention can be understood by those skilled in the art according to specific situations.

In the present invention, unless otherwise expressly stated or limited, the first feature "on" or "under" the second feature may be directly contacting the first and second features or indirectly contacting the first and second features through an intermediate. Also, a first feature "on," "over," and "above" a second feature may be directly or diagonally above the second feature, or may simply indicate that the first feature is at a higher level than the second feature. A first feature being "under," "below," and "beneath" a second feature may be directly under or obliquely under the first feature, or may simply mean that the first feature is at a lesser elevation than the second feature.

It will be understood that when an element is referred to as being "secured to" or "disposed on" another element, it can be directly on the other element or intervening elements may also be present. When an element is referred to as being "connected" to another element, it can be directly connected to the other element or intervening elements may also be present. The terms "vertical," "horizontal," "upper," "lower," "left," "right," and the like as used herein are for illustrative purposes only and do not denote a unique embodiment.

Claims

1. A multiple degree of freedom positioning structure, for positioning a shaft of a surgical instrument, comprising:

the supporting assembly is provided with two first through holes at intervals, and a first mounting position is arranged on the inner wall of each first through hole in a surrounding manner;

two first supporter, two first supporter is rotatable respectively and/or can swing set up in two first installation position, be equipped with the second through-hole on the first supporter, the pore wall of second through-hole is used for the centre gripping the action bars.

2. The multiple degrees of freedom positioning structure of claim 1, wherein the first mounting position is a first concave portion disposed around an inner wall of the first through hole, and a first elastic support ring is disposed around an outer wall of the first support body and closely abutted against an inner wall of the first concave portion;

3. The multiple degree of freedom positioning structure of claim 2, wherein the first through hole includes a first tapered hole section having a gradually decreasing hole diameter along an axial direction of the first through hole, a larger hole diameter end of the first tapered hole section is closer to the top surface of the support member than a smaller hole diameter end of the first tapered hole section, and the first concave portion is correspondingly disposed on a hole wall of the first tapered hole section.

4. The multiple degrees of freedom positioning structure of claim 1, wherein the hole wall of the second through hole is provided with at least one damping sealing ring, and the damping sealing ring is used for tightly abutting against and positioning the operating rod.

5. The multiple degree of freedom positioning structure of claim 1 wherein the support assembly includes a fixed support block and a second support body; the fixed supporting block is provided with a third through hole, a second mounting position is arranged on the inner wall of the third through hole in an encircling mode, the second supporting body is rotatably and/or swingably arranged on the second mounting position, and the two first through holes are arranged on the second supporting body at intervals.

6. The multiple degree of freedom positioning structure of claim 5, wherein the second mounting location is a second recess disposed around an inner wall of the third through hole; the inner wall of the second concave part is an arc-shaped surface; and a second elastic support ring is arranged on the outer wall of the second support body in a surrounding manner and is tightly abutted against the inner wall of the second concave part.

7. The multiple degree of freedom positioning structure of claim 6, wherein the third through hole includes a second tapered hole section whose hole diameter gradually decreases along an axial direction of the third through hole, a larger hole diameter end of the second tapered hole section is closer to the top surface of the support member than a smaller hole diameter end, and the second concave portion is correspondingly disposed on a hole wall of the second tapered hole section.

8. A composite operating channel, comprising: the multiple degree of freedom positioning structure of any one of claims 1 through 7, further comprising a channel tube assembly to which the fixed support block of the support assembly is attached, an inner channel of the channel tube assembly being disposed in correspondence with the second support body of the support assembly, the inner channel being usable for inserting an endoscope and a tool.

9. The compound operation channel of claim 8, further comprising a water injection valve and a suction valve disposed on the fixed support block; a water injection channel and a suction channel are arranged on the fixed supporting block; the channel pipe assembly comprises a first channel pipe, a second channel pipe, a third channel pipe, a first sealing ring and a second sealing ring; the first channel pipe, the second channel pipe and the third channel pipe are sequentially nested from inside to outside, and one end of the first channel pipe, one end of the second channel pipe and one end of the third channel pipe are all arranged at the bottom of the fixed supporting block; the first channel pipe and the second channel pipe form a water injection cavity at intervals, the first sealing ring is arranged between the other end of the first channel pipe and the inner wall of the second channel pipe, the inner channel is a channel of the first channel pipe, and a plurality of first water through holes communicated between the water injection cavity and the inner channel are formed in the pipe wall of the first channel pipe; the second channel pipe and the third channel pipe form a suction chamber at intervals, the second sealing ring is arranged between the other end of the third channel pipe and the inner wall of the second channel pipe, and a plurality of second water through holes are formed in the pipe wall of the third channel pipe; one end of the water injection channel is communicated with the water injection valve, and the other end of the water injection channel is communicated with the water injection cavity; one end of the suction passage is communicated with the suction valve, and the other end of the suction passage is communicated with the suction chamber.

10. The compound operation channel as claimed in claim 9, wherein the bottom of the fixed supporting block is provided with a first enclosing plate, a second enclosing plate and a third enclosing plate which are sequentially sleeved from inside to outside; the first enclosing plate is detachably connected with one end of the first channel pipe in a sleeved mode; the second enclosing plate is detachably connected with one end of the second channel pipe in a sleeved mode; the third enclosing plate is detachably connected with one end of the third channel pipe in a sleeved mode.

11. The multiple operation channel according to claim 9, wherein the first water passing hole is obliquely provided on the tube wall of the first channel tube, and the water outlet side of the first water passing hole is farther from the fixed support block than the water inlet side of the first water passing hole.

12. The composite handling channel of claim 9, wherein the other end of the second channel tube extends outside the first channel tube and the third channel tube, and a plurality of spaced slits are provided in the other end of the second channel tube.

13. The compound operating channel of claim 9, further comprising a pressurization valve; the channel pipe assembly further comprises an inflatable sheath, the inflatable sheath is sleeved outside the third channel pipe and provided with a closed chamber, an inflation channel is arranged on the fixed supporting block, the pressurization valve is arranged on the fixed supporting block and communicated with one end of the inflation channel, and the other end of the inflation channel is communicated with the closed chamber.

14. The composite handling channel of claim 13, wherein the inflatable sheath is provided with a non-slip portion on an outer wall thereof; the inflatable sheath is an elastic sleeve.

15. The composite operating channel of claim 13, wherein the inflatable sheath is provided with a positioning portion on an inner wall thereof, and the third channel tube is provided with a positioning groove adapted to the positioning portion on an outer wall thereof, the positioning portion being provided in the positioning groove.

16. A surgical device comprising the composite operating channel of any one of claims 8 to 15, further comprising an endoscope disposed in the second through-hole of one of the first supports and a cutter disposed in the second through-hole of the other of the first supports.