Bent snake bone structure and probe

Abstract

The utility model discloses a bent snake bone structure and a probe, the bent snake bone structure comprises a bent snake bone, an adjusting rope and an elastic supporting piece, and the bent snake bone comprises a plurality of snake bone joints which are sequentially arranged along the length direction of the bent snake bone; the snake bone joint is provided with a near end face and a far end face which are both cambered surfaces. A first through hole and a second through hole which penetrate through the near end face and the far end face are formed in the snake bone joint; the adjusting rope is arranged in the first through holes of the multiple sections of snake bone joints in a penetrating mode and used for driving the bent snake bone to bend, and the elastic supporting piece is arranged in the second through holes of the multiple sections of snake bone joints in a penetrating mode and used for providing elastic force for the bent snake bone. The near end face and the far end face of the snake bone joint are both arranged to be the oval arc faces, when the bent snake bone is bent, the two adjacent snake bone joints can roll along the oval arc faces, friction damping between the two adjacent snake bone joints is reduced, and bending of the bent snake bone can be achieved by applying small force through the adjusting rope; abrasion at the joint of the snake bone joint is reduced, and the service life of the snake bone structure can be obviously prolonged.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a curved snake bone structure and a probe. Background Art

[0002] At present, ultrasound probes are usually used when performing ultrasound examinations on patients. Transesophageal probes and intracardiac ultrasound probes are commonly used to insert into the human body to examine the health of the heart. Their structures usually consist of an insertion part inserted into the human body and an operating part left outside the human body.

[0003] The insertion part includes the frontmost ultrasonic probe tip, the bending part connected thereto, and the slender hose part connected to the bending part. The bending part can usually be controlled by the operating part outside the human body to bend in two or four relative directions. Since the bending part is directly and fixedly connected to the frontmost ultrasonic probe tip, the bending part will bend with the ultrasonic probe tip when it bends, thereby achieving the function of finding the desired location. The bending part is usually an assembly composed of multiple similar parts, and its structure is similar to the joints of snake bones, so it is also called a "snake bone structure". The snake bone structure can achieve arc bending within a certain range, and its bending movement can be adjusted and controlled.

[0004] For the snake bone structure, the curved snake bone structure in the prior art is as follows Figure 1 and Figure 2 As shown:

[0005] exist Figure 1 In the embodiment, the snake bone structure includes a plurality of snake bone joints 50, which are assembled by splicing a plurality of snake bone joints 50.

[0006] exist Figure 2 In the figure, the structure of the snake bone joint 50 has a small round hole 62, a rectangular notch 65, a rectangular notch 67, a rotation reference protrusion structure 54, and an installation reference groove 52. There are two small round holes 62, located at the edges of both sides of the joint 50, for inserting a slender rope. The rectangular notch 65 is relatively wide, and is used to pass a rectangular flat metal shrapnel through the snake bone joint. The flat metal shrapnel can provide elasticity and a certain strength for the bending movement of the entire snake bone structure. The rectangular notch 67 is relatively flat, and is used to pass a slender strip of soft circuit board connecting the operating end and the tip of the ultrasonic probe through it, for transmitting ultrasonic signals. The rotation reference protrusion structure 54 is used for splicing and installation with the installation reference grooves 52 of other snake bone joints 50, and is used to provide a rotation reference for the rotation of the snake bone joint when the snake bone is bent.

[0007] In this bending serpentine structure, since the connection between the serpentine joints 50 is completed by the mutual engagement of the rotation reference protrusion structure 54 and the installation reference groove 52, when the serpentine structure is bent, the rotational movement of the two adjacent serpentine joints is frictional rotation around the center line of the rotating shaft formed at the engagement point. Since the surfaces of the protrusion structure and the groove structure of the serpentine joint are not easy to be polished smooth, there is friction damping in the relative rotation of the two serpentine joints at the engagement point, which will increase the force required for the bending of the serpentine structure and accelerate the wear of the serpentine joint engagement point. Utility Model Content

[0008] Therefore, the technical problem to be solved by the utility model is to overcome the defects of the prior art that the bending serpentine structure is not easy to bend due to friction damping between adjacent serpentine joints when bending, and the serpentine joints are prone to wear, thereby providing a bending serpentine structure and a probe.

[0009] In order to solve the above technical problems, the technical solution of the utility model is as follows:

[0010] A curved snake bone structure, the curved snake bone comprising a plurality of snake bone joints stacked and arranged in sequence along the length extension direction of the curved snake bone; the snake bone joint has a proximal surface located at the proximal end and a distal surface located at the distal end, and both the proximal surface and the distal surface are arc surfaces; a first through hole and a second through hole penetrating the proximal surface and the distal surface are provided inside each of the snake bone joints; a plurality of the first through holes on the plurality of snake bone joints extend along the length direction of the curved snake bone to form a first channel, and a plurality of the second through holes on the plurality of snake bone joints extend along the length direction of the curved snake bone to form a second channel;

[0011] An adjusting rope is passed through the first channel and is used to drive the bending snake bone to bend;

[0012] An elastic support member is passed through the second channel to provide elastic force for the curved snake bone.

[0013] Furthermore, the proximal end surface and the distal end surface are both convex elliptical arc surfaces.

[0014] Furthermore, on the same serpentine joint, the proximal surface and the distal surface are symmetrically arranged along the central longitudinal section of the serpentine joint.

[0015] Furthermore, the serpentine joint is in the shape of an elliptical cylinder, and the proximal end surface and the distal end surface together constitute the elliptical cylinder surface of the serpentine joint.

[0016] Furthermore, the first through hole is arranged at a peripheral position of the snake bone joint that is off-center.

[0017] Furthermore, the second through hole is arranged at a position closer to the center of the snake bone joint than the first through hole.

[0018] Furthermore, the cross-sectional area of ​​the second through hole is larger than the cross-sectional area of ​​the first through hole, and the cross-sectional area of ​​the elastic support member is larger than the cross-sectional area of ​​the adjustment rope.

[0019] Furthermore, there are two first through holes on each section of the snake bone joint, and two groups of first through holes corresponding to the positions on multiple sections of the snake bone joints form two first channels; there are two adjustment ropes, and each adjustment rope is passed through one of the first channels.

[0020] Furthermore, a third through hole penetrating the proximal surface and the distal surface is also provided inside the serpentine joint, and the multiple third through holes on multiple sections of the serpentine joint extend along the length direction of the curved serpentine to form a third channel, and the third channel is for a flexible conductive element to pass through.

[0021] Furthermore, the third through hole is a long strip hole.

[0022] A probe comprises an operating part and an insertion part, wherein the insertion part is suitable for being inserted into the interior of a target to be measured; the insertion part comprises an insertion tube connected to the proximal end of the operating part, a bending mechanism connected to the distal end of the insertion tube, and a probe tip connected to the distal end of the bending mechanism; the bending mechanism is a bending snake-bone structure as described above.

[0023] Furthermore, a flexible protective film is provided on the periphery of the plurality of serpentine joints, the distal end of the flexible protective film is sealedly connected to the probe tip, and the proximal end of the flexible protective film is sealedly connected to the distal end of the insertion tube.

[0024] Furthermore, the probe is an ultrasonic probe, and an ultrasonic transducer is disposed in the tip of the probe.

[0025] The technical solution of the utility model has the following advantages:

[0026] 1. The curved snake bone structure provided by the utility model has a proximal surface and a distal surface of the snake bone joint that are both elliptical arc surfaces, and the contact mode between the proximal surface of the previous snake bone joint and the distal surface of the next snake bone joint is arc surface contact. When the curved snake bone is bent, the two adjacent snake bone joints will roll along the arc surface, reducing the friction damping between the two adjacent snake bone joints. The bending adjustment of the curved snake bone can be achieved by applying a small force through the adjustment rope, reducing the wear of the connection between adjacent snake bone joints. In addition, in the process of assembling the curved snake bone structure, it is only necessary to insert multiple snake bone joints into the elastic support member at will, and there is no need to accurately install the raised rotation reference of one snake bone joint into the groove rotation reference of another snake bone joint as in the prior art, which reduces the assembly difficulty of the operator and is conducive to improving the assembly effect and assembly qualification rate of the curved snake bone structure.

[0027] 2. The curved serpentine structure provided by the utility model makes the polishing and grinding operations of the proximal and distal surfaces of the serpentine joint more convenient because the proximal and distal surfaces of the serpentine joint are both convex elliptical arc surfaces, which is conducive to preparing a serpentine joint with very high smoothness of the proximal and distal surfaces, thereby reducing friction damping.

[0028] 3. The curved serpentine structure provided by the utility model has the proximal and distal surfaces of the same serpentine joint symmetrically arranged along the central longitudinal section of the serpentine joint, so that the elliptical arc surface of the serpentine joint is a regular standard elliptical surface without other special-shaped structural features. It is relatively simple to process the shape of the serpentine joint, thereby significantly reducing the processing difficulty of the serpentine joint and reducing the manufacturing cost.

[0029] 4. The bending snake bone structure provided by the utility model has a first through hole arranged at a peripheral position off-center of the snake bone joint, and only a small force needs to be applied to the adjustment rope to pull the bending snake bone to bend, which is easy to operate.

[0030] 5. In the curved snake bone structure provided by the utility model, the second through hole is arranged at a position closer to the center of the snake bone joint relative to the first through hole, and the elastic support member can provide sufficient supporting force and elastic force for the curved snake bone, so as to facilitate the rapid resetting of the curved snake bone after loosening the adjustment rope.

[0031] 6. The cross-sectional area of ​​the elastic support member of the bending snake bone structure provided by the utility model is larger than that of the adjusting rope. The elastic support member can provide a relatively larger supporting force and elastic force for the bending snake bone, further facilitating the rapid resetting of the bending snake bone after loosening the adjusting rope.

[0032] 7. The bending snake bone structure provided by the utility model has two first through holes on the snake bone joint, and an adjustment rope is passed through the first channel formed by each group of first through holes. Pulling the two adjustment ropes can realize the bending of the bending snake bone in two different directions.

[0033] 8. The curved serpentine structure provided by the utility model has a third through hole set on the serpentine joint, and multiple third through holes on the multi-section serpentine joints extend along the length direction of the curved serpentine to form a third channel. A flexible conductive element can pass through the third channel, and the proximal end of the conductive element can be electrically connected to the proximal component, and the proximal end can be electrically connected to the distal component, so as to realize signal transmission between the proximal component and the distal component.

[0034] 9. The probe provided by the utility model has a bending mechanism that adopts the above-mentioned bending snake-bone structure and has all the advantages of the above-mentioned bending snake-bone structure.

[0035] 10. The probe provided by the utility model has both ends of the flexible protective film sealed and connected, so that the snake-bone structure can be completely sealed and wrapped, further improving the safety and reliability during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0036] In order to more clearly illustrate the specific implementation methods of the utility model or the technical solutions in the prior art, the drawings required for use in the specific implementation methods or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are some implementation methods of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0037] Figure 1 It is a structural schematic diagram of the snake bone structure in the prior art;

[0038] Figure 2 It is a schematic diagram of the structure of the snake bone joint in the prior art;

[0039] Figure 3 This is a schematic diagram of the structure of the probe in the embodiment of the utility model;

[0040] Figure 4 This is a schematic diagram of the connection structure of the curved snake bone, the probe tip and the insertion tube in the embodiment of the utility model;

[0041] Figure 5 A schematic diagram of a curved snake bone structure in an embodiment of the utility model;

[0042] Figure 6 It is a partial cross-sectional view of the curved snake bone structure in the embodiment of the utility model;

[0043] Figure 7 The three-dimensional structure of the snake bone joint in the utility model is shown in FIG. Figure 1 ;

[0044] Figure 8 The three-dimensional structure of the snake bone joint in the utility model is shown in FIG. Figure 2 ;

[0045] Fig. 9 It is a side view of the snake bone joint in the utility model.

[0046] Explanation of the reference numerals: 1. curved snake bone; 11. snake bone joint; 11a. proximal surface; 11b. distal surface; 111. first through hole; 112. second through hole; 113. third through hole; 12. elastic support member; 13. adjustment rope; 2. probe tip; 3. insertion tube; 4. operating part. DETAILED DESCRIPTION

[0047] The technical solution of the utility model will be described clearly and completely below in conjunction with the accompanying drawings. Obviously, the described embodiments are part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] In the description of the present utility model, it should be noted that the terms "center", "up", "down", "left", "right", "vertical", "horizontal", "inside", "outside" and the like indicate directions or positional relationships based on the directions or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific direction, be constructed and operated in a specific direction, and therefore cannot be understood as a limitation on the present utility model. In addition, the terms "first", "second", and "third" are used for descriptive purposes only, and cannot be understood as indicating or implying relative importance. The term "distal end" refers to the end far from the operator, and the term "proximal end" refers to the end close to the operator.

[0049] In the description of the present invention, it should be noted that, unless otherwise clearly specified and limited, the terms "installation", "connection" and "connection" should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection, or it can be indirectly connected through an intermediate medium, or it can be the internal communication of two components. For ordinary technicians in this field, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0050] The present invention provides a probe, which can be a transesophageal probe, an intracardiac ultrasound probe or an endoscopic probe. Figure 3As shown, the probe includes an operating part 4 and an insertion part, the operating part 4 is an operating part located outside the human body, and the insertion part is a detection part suitable for inserting into the inside of the measured object. The insertion part includes an insertion tube 3 connected to the proximal end of the operating part 4, a bending mechanism connected to the distal end of the insertion tube 3, and a probe tip 2 connected to the distal end of the bending mechanism. The bending mechanism is flexible, and the bending mechanism is hard enough but flexible enough to allow the operator to position the probe tip 2 at the distal end of the probe to the relevant anatomical structure (such as the esophagus) at the desired penetration depth; the bending mechanism is thin enough to allow the probe tip 2 to be placed in the relevant anatomical structure, and allows the bending mechanism to remain in place for a long time without causing problems or excessive discomfort. The structure of the operating part 4 is well known to technicians in the relevant field, and is therefore not described in detail here. Similarly, the mechanism for transmitting the operator's control actuation to the probe tip 2 through the bending mechanism is also well known and is not described here.

[0051] In some embodiments, the probe is an ultrasonic probe, and an ultrasonic transducer for transmitting and receiving ultrasonic signals is disposed in the probe tip 2. The bending mechanism is specifically a bending snake-bone structure.

[0052] like Figure 4 As shown in Figure 9, the curved snake bone structure includes a curved snake bone 1, an adjustment rope 13 and an elastic support member 12. The curved snake bone 1 includes a plurality of snake bone joints 11 stacked and arranged in sequence along the length extension direction of the curved snake bone 1; the snake bone joint 11 has a proximal surface 11a located at the proximal end and a distal surface 11b located at the distal end, and both the proximal surface 11a and the distal surface 11b are elliptical arc surfaces. The interior of each snake bone joint 11 is provided with a first through hole 111 and a second through hole 112 penetrating the proximal surface 11a and the distal surface 11b; the plurality of first through holes 111 on the plurality of snake bone joints 11 extend along the length direction of the curved snake bone 1 to form a first channel, and the plurality of second through holes 112 on the plurality of snake bone joints 11 extend along the length direction of the curved snake bone 1 to form a second channel. The adjustment rope 13 is passed through the first channel to drive the curved snake bone 1 to bend. The elastic support member 12 is passed through the second channel to provide elastic force and support force for the curved snake bone 1.

[0053] This curved snake bone structure is achieved by setting the proximal surface 11a and the distal surface 11b of the snake bone joint 11 to be elliptical arc surfaces. The contact between the proximal surface 11a of the previous snake bone joint 11 and the distal surface 11b of the next snake bone joint 11 is elliptical arc surface contact. When the curved snake bone 1 is bent, the two adjacent snake bone joints 11 will roll along the elliptical arc surface, reducing the friction damping between the two adjacent snake bone joints 11. The bending adjustment of the curved snake bone 1 can be achieved by applying a small force through the adjustment rope 13, reducing the wear of the connection between the adjacent snake bone joints 11. In addition, in the process of assembling the curved snake bone structure, it is only necessary to insert the multiple snake bone joints 11 into the elastic support member 12 at will. It is not necessary to accurately install the raised rotation reference of one snake bone joint 11 into the groove rotation reference of another snake bone joint 11 as in the prior art, which reduces the assembly difficulty of the operator and is conducive to improving the assembly effect and assembly qualification rate of the curved snake bone structure.

[0054] In some embodiments, the proximal surface 11a and the distal surface 11b of the snake bone joint 11 are both convex elliptical arc surfaces. Since the convex elliptical arc surface does not have an area that is difficult to be polished and ground compared to the concave arc surface, the proximal surface 11a and the distal surface 11b of the snake bone joint 11 are easier to be polished into smooth surfaces, which is conducive to preparing a snake bone joint 11 with very high smoothness of the proximal surface 11a and the distal surface 11b, reducing friction damping during rotation. In an alternative embodiment, the proximal surface 11a and the distal surface 11b can also be convex olive-shaped arc surfaces.

[0055] In some embodiments, the proximal end face 11a and the distal end face 11b of the same snake bone joint 11 are symmetrically arranged along the central longitudinal section of the snake bone joint 11. Further, the snake bone joint 11 is in the shape of an elliptical cylinder, and the proximal end face 11a and the distal end face 11b together constitute the elliptical cylinder surface of the snake bone joint 11. Such an arrangement makes the elliptical arc surface of the snake bone joint 11 a regular standard elliptical surface without other special-shaped structural features, which is relatively simple when processing the appearance of the snake bone joint 11, so that the processing difficulty of the snake bone joint 11 can be significantly reduced, and the manufacturing cost can be reduced.

[0056] In some embodiments, there are two first through holes 111, and both first through holes 111 are arranged at peripheral positions off-center of the snake bone joint 11; in this way, only a small force needs to be applied to the adjustment rope 13 to pull the bending snake bone 1 to bend, which is easy to operate. Specifically, two groups of first through holes 111 corresponding to the positions on the multi-section snake bone joint 11 form two first channels; there are two adjustment ropes 13, and each adjustment rope 13 is passed through one of the first channels. Pulling the two adjustment ropes 13 can realize the bending of the bending snake bone 1 in two different directions.

[0057] In some embodiments, the two first through holes 111 and the second through hole 112 are both circular holes; the adjustment rope 13 is a slender rope, and the elastic support member 12 is a slender spring or rod-shaped member. The diameter of the adjustment rope 13 is slightly smaller than the diameter of the first through hole 111, so that the adjustment rope 13 can be inserted into the first through hole 111. The diameter of the elastic support member 12 is not larger than the diameter of the second through hole 112, and the outer wall of the elastic support member 12 is supported on the inner wall of the second through hole 112 to form a tight support structure; the elastic support member 12 can bend with the bending of the snake bone joint 11, and provide sufficient support force and elastic recovery force for the snake bone joint 11.

[0058] In some embodiments, the aperture of the second through hole 112 is larger than the aperture of any of the first through holes 111, the second through hole 112 is arranged at a position closer to the center of the snake bone joint 11 relative to the two first through holes 111, and the cross-sectional area of ​​the adjustment rope 13 is smaller than the cross-sectional area of ​​the elastic support member 12. In this way, the elastic support member 12 can provide sufficient support force and elastic force for the bending snake bone 1, so that the bending snake bone 1 can be quickly reset after the adjustment rope 13 is loosened.

[0059] In some embodiments, the inside of the snake bone joint 11 is further provided with a third through hole 113 that passes through the proximal surface 11a and the distal surface 11b. The multiple third through holes 113 on the multi-section snake bone joint 11 extend along the length direction of the curved snake bone 1 to form a third channel, and the third channel is for a flexible conductive element to pass through. Specifically, the third through hole 113 is a long strip hole; the flexible conductive element is a soft circuit board, the proximal end of the soft circuit board is electrically connected to the operating part 4, and the distal end of the soft circuit board is electrically connected to the probe tip 2. The third through hole 113 is provided on the snake bone joint 11, and the soft circuit board can pass through the third channel formed by the multiple third through holes 113, and the soft circuit board can realize signal transmission between the proximal operating part 4 and the distal probe tip 2.

[0060] In some embodiments, the curved snake-bone structure further includes a flexible protective film (not shown) sleeved on the periphery of the multi-section snake-bone joint 11, the distal end of the flexible protective film is sealed with the probe tip 2 by glue, and the proximal end of the flexible protective film is sealed with the distal end of the insertion tube 3 by glue. The flexible protective film is specifically a thin-walled soft rubber. Both ends of the flexible protective film are sealed with glue, so that the snake-bone structure can be completely sealed and wrapped, further improving the safety and reliability during use.

[0061] In summary, the curved serpentine structure and probe provided by the embodiment of the utility model are achieved by setting the proximal surface 11a and the distal surface 11b of the serpentine joint 11 to be elliptical arc surfaces, and the contact mode between the proximal surface 11a of the previous serpentine joint 11 and the distal surface 11b of the next serpentine joint 11 is elliptical arc contact. When the curved serpentine 1 bends, the two adjacent serpentine joints 11 will roll along the elliptical arc surface, reducing the friction damping between the two adjacent serpentine joints 11. The bending adjustment of the curved serpentine 1 can be achieved by applying a small force through the adjustment rope 13, which reduces the wear at the connection between the adjacent serpentine joints 11 and can significantly improve the service life of the serpentine structure and the probe. In addition, in the process of assembling the curved snake bone structure, it is only necessary to insert the multiple snake bone joints 11 into the elastic support member 12 at will. There is no need to accurately install the raised rotation reference of one snake bone joint 11 into the groove rotation reference of another snake bone joint 11 as in the prior art. This reduces the assembly difficulty for operators and is conducive to improving the assembly effect and assembly qualification rate of the curved snake bone structure.

[0062] Obviously, the above embodiments are merely examples for the purpose of clear explanation, and are not intended to limit the implementation methods. For those skilled in the art, other different forms of changes or modifications can be made based on the above description. It is not necessary and impossible to list all the implementation methods here. The obvious changes or modifications derived therefrom are still within the scope of protection of the invention of the utility model.

Claims

1. A curved snake bone structure, characterized in that: include: A curved snake bone (1) comprises a plurality of snake bone joints (11) stacked and arranged in sequence along the length extension direction of the curved snake bone (1); the snake bone joint (11) comprises a proximal surface (11a) located at the proximal end and a distal surface (11b) located at the distal end, and the proximal surface (11a) and the distal surface (11b) are both arc surfaces; a first through hole (111) and a second through hole (112) penetrating the proximal surface (11a) and the distal surface (11b) are provided inside each of the snake bone joints (11); the plurality of the first through holes (111) on the plurality of snake bone joints (11) extend along the length direction of the curved snake bone (1) to form a first channel, and the plurality of the second through holes (112) on the plurality of snake bone joints (11) extend along the length direction of the curved snake bone (1) to form a second channel; An adjustment rope (13) is passed through the first channel and is used to drive the bending snake bone (1) to bend; An elastic support member (12) is passed through the second channel to provide elastic force for the curved snake bone (1).

2. The curved snake bone structure according to claim 1, characterized in that: The proximal end surface (11a) and the distal end surface (11b) are both convex elliptical arc surfaces.

3. The curved snake bone structure according to claim 1, characterized in that: On the same serpentine joint (11), the proximal end surface (11a) and the distal end surface (11b) are symmetrically arranged along the central longitudinal section of the serpentine joint (11).

4. The curved snake bone structure according to claim 3, characterized in that: The serpentine joint (11) is in the shape of an elliptical cylinder, and the proximal end surface (11a) and the distal end surface (11b) together constitute the elliptical cylinder surface of the serpentine joint (11).

5. The curved snake bone structure according to claim 1, characterized in that: The first through hole (111) is arranged at a peripheral position of the snake bone joint (11) that is off-center.

6. The curved snake bone structure according to claim 5, characterized in that: The second through hole (112) is arranged at a position closer to the center of the snake bone joint (11) than the first through hole (111).

7. The curved snake bone structure according to claim 1, characterized in that: The cross-sectional area of ​​the second through hole (112) is greater than the cross-sectional area of ​​the first through hole (111), and the cross-sectional area of ​​the elastic support member (12) is greater than the cross-sectional area of ​​the adjustment rope (13).

8. The curved snake bone structure according to claim 1, characterized in that: There are two first through holes (111) on each section of the snake bone joint (11), and two groups of first through holes (111) at corresponding positions on multiple sections of the snake bone joints (11) form two first channels; there are two adjustment ropes (13), and each adjustment rope (13) is passed through one of the first channels.

9. The curved snake bone structure according to claim 1, characterized in that: The interior of the snake bone joint (11) is also provided with a third through hole (113) penetrating the proximal surface (11a) and the distal surface (11b); a plurality of the third through holes (113) on the multiple sections of the snake bone joint (11) extend along the length direction of the curved snake bone (1) to form a third channel, and the third channel is used for a flexible conductive element to pass through.

10. The curved snake bone structure according to claim 9, characterized in that: The third through hole (113) is a long strip-shaped hole.

11. A probe, characterized in that: The invention comprises an operating part (4) and an insertion part, wherein the insertion part is suitable for being inserted into the interior of a target to be measured; the insertion part comprises an insertion tube (3) connected to the proximal end of the operating part (4), a bending mechanism connected to the distal end of the insertion tube (3), and a probe tip (2) connected to the distal end of the bending mechanism; the bending mechanism is a bending snake bone structure as described in any one of claims 1 to 10.

12. The probe according to claim 11, characterized in that: The outer peripheries of the multiple sections of the serpentine joints (11) are covered with flexible protective films, the distal end of the flexible protective films is sealedly connected to the probe tip (2), and the proximal end of the flexible protective films is sealedly connected to the distal end of the insertion tube (3).

13. The probe according to claim 12, characterized in that: The probe is an ultrasonic probe, and an ultrasonic transducer is arranged inside the probe tip (2).

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