A bending assembly and endoscopic surgical instrument

Abstract

The utility model provides a kind of bending adjusting assembly and endoscopic surgical instrument, to solve the problems of complex processing technology and high cost in prior art. Including first connecting section, second connecting section, multiple segments and several rotating members, the distal end of first connecting section is connected with operating assembly;The proximal end of second connecting section is connected with catheter;Multiple segments are arranged between first connecting section and second connecting section;Several rotating members are respectively connected between the proximal end of first connecting section and the distal end of adjacent segment of itself, between adjacent segments and between the distal end of second connecting section and the proximal end of adjacent segment of itself. The component can reduce processing steps and reduce manufacturing cost.

Description

Technical Field

[0001] This utility model belongs to the field of medical devices, and in particular relates to a bending adjustment component and an endoscopic surgical instrument. Background Technology

[0002] Endoscopic submucosal dissection (ESD), a minimally invasive treatment technique, involves using specialized surgical instruments such as a high-frequency electrosurgical unit under endoscopic guidance to peel away the lesion layer by layer from the underlying normal submucosa, thereby achieving en bloc resection of the diseased tissue. With its significant advantages of minimal trauma, less bleeding, and rapid postoperative recovery, this technique has become the preferred treatment for early-stage gastrointestinal mucosal cancer and benign submucosal tumors. Surgical instruments play a crucial role in ESD procedures. Effective tissue traction not only clearly exposes the uncut area for precise electrosurgical operation but also significantly improves the safety, efficiency, and ease of operation of the procedure.

[0003] However, existing technologies mostly use rivet connections for adjustable bending components, which are complex to manufacture and expensive, greatly increasing the cost of disposable consumables. Utility Model Content

[0004] In view of the shortcomings of the prior art described above, the purpose of this utility model is to provide a bending adjustment component and an endoscopic surgical instrument to solve the problems of complex processing technology and high cost in the prior art.

[0005] To achieve the above and other related objectives, this utility model provides a bending adjustment component, comprising: The first connecting segment is located at the distal end of the surgical instrument; The second connecting segment, the proximal end of which is connected to the catheter; Multiple segments, wherein the multiple segments are disposed between the first connecting segment and the second connecting segment; A plurality of rotating components are provided, which respectively rotatably connect the proximal end of the first connecting segment to the distal end of the segment adjacent to it, between adjacent segments, and between the distal end of the second connecting segment and the proximal end of the segment adjacent to it. Each rotating component includes two oppositely arranged outer cantilever arms, each fixedly connected to one end of the segment, two oppositely arranged inner cantilever arms, each fixedly connected to the other end of the segment, and at least one rotating shaft. At least one rotating shaft is perpendicularly fixed to the inner cantilever arm, and the outer cantilever arm has a rotating hole that rotatably engages with the rotating shaft. When the rotating component is connected, the outer cantilever is deformed to rotate the shaft and the rotating hole together.

[0006] Optionally, the inner cantilever, the outer cantilever, the pivot, and the segment are formed by injection molding.

[0007] Optionally, the two outer cantilever arms and the two inner cantilever arms are respectively fixed to both ends of the segment and are located in the same cross section to form an H-shaped structure, so that the bending directions of the multiple segments are two opposite bending directions.

[0008] Optionally, the two outer cantilever arms and the two inner cantilever arms are respectively fixed to both ends of the segment and are staggered at intervals in the circumferential direction of the segment so that the bending directions of the multiple segments are four directions.

[0009] Optionally, the first connecting segment and the second connecting segment have circumferential limiting rings.

[0010] Optionally, it also includes a woven mesh, which is sleeved on the outside of the first connecting segment, the second connecting segment and the plurality of segments, and located between the limiting rings of the first connecting segment and the second connecting segment; Alternatively, it may also include a rubber tube, which is sleeved on the outside of the first connecting segment, the second connecting segment, and the plurality of segments, and located between the limiting rings of the first connecting segment and the second connecting segment.

[0011] Alternatively, it may also include a braided mesh and a rubber tube, with the braided mesh sleeved on the outside of the first connecting segment, the second connecting segment, and the plurality of segments, and the rubber tube sleeved on the outside of the braided mesh and located between the limiting rings of the first connecting segment and the second connecting segment.

[0012] Optionally, a reinforcing arm is provided between the opposing inner cantilever arms.

[0013] Optionally, the first connecting segment, the second connecting segment, and the plurality of segments each have a through-hole along their own central axis.

[0014] Optionally, it also includes a bending power element for driving the plurality of segments to undergo bending deformation.

[0015] An endoscopic surgical instrument, including the aforementioned bending adjustment assembly.

[0016] As described above, the bending adjustment component and endoscopic surgical instrument of this utility model have at least the following beneficial effects: By allowing the outer cantilever to elastically deform, such as slightly opening, the pivot on the inner cantilever can be inserted into the pivot hole of the outer cantilever, enabling quick plug-and-play assembly without complex tools, thus reducing manufacturing and maintenance costs. After assembly, the outer cantilever returns to its original shape, and the pivot and pivot hole form a stable rotational fit. The deformation and reset of the outer cantilever provides lateral constraint on the pivot, preventing it from falling off and ensuring structural strength during rotation. This provides a stable center of rotation, ensuring precise motion transmission and reducing backlash. The rotating component uses a cantilever and pivot structure, occupying little space and suitable for miniaturized applications. Attached Figure Description

[0017] Figure 1 The diagram shown is a three-dimensional structural schematic of this utility model; Figure 2 The diagram shown is a three-dimensional structural schematic of the rotating component of this utility model; Figure 3 This is a three-dimensional structural schematic diagram of another embodiment of the present invention; Figure 4 The diagram shown is a three-dimensional structural schematic of another embodiment of the rotating component of this utility model; Figure 5 The diagram shown is a three-dimensional structural schematic of the bending dynamic component of this utility model.

[0018] Component designation explanation First connecting section 21, second connecting section 22, segment 23, rotating component 24, outer cantilever 241, inner cantilever 242, rotating shaft 243, rotating hole 244, reinforcing arm 245, wire hole 25, wire hole 26, limiting ring 27, rubber tube 28, bending power component 29. Detailed Implementation

[0019] The following specific embodiments illustrate the implementation of this utility model. Those skilled in the art can easily understand other advantages and effects of this utility model from the content disclosed in this specification.

[0020] Please see Figures 1 to 5 It should be understood that the structures, proportions, sizes, etc., depicted in the accompanying drawings are merely for illustrative purposes to aid those skilled in the art and are not intended to limit the scope of this invention. Therefore, they have no substantial technical significance. Any modifications to the structure, changes in proportions, or adjustments to size, without affecting the effectiveness and purpose of this invention, should still fall within the scope of the technical content disclosed in this invention. Furthermore, the terms such as "upper," "lower," "left," "right," "middle," and "one" used in this specification are merely for clarity and are not intended to limit the scope of this invention. Changes or adjustments to their relative relationships, without substantially altering the technical content, should also be considered within the scope of this invention.

[0021] In this utility model, "proximal end" and "distal end" refer to the relative distance between the medical device and the operator during use. The end closer to the operator is the proximal end, and the end farther away from the operator is the distal end.

[0022] The following embodiments are for illustrative purposes only. These embodiments can be combined and are not limited to the content shown in any single embodiment below.

[0023] In this embodiment, please refer to Figures 1 to 5 This utility model provides a bending adjustment component, comprising: The first connecting segment 21 is located at the distal end of the surgical instrument. It can be used to connect with an operating component, which can be a traction clamp for pulling tissue, an electrosurgical unit for cutting tissue, or other structures used to perform corresponding operations on tissue during surgery. This embodiment does not limit this. It can also be used in surgeries performed inside the stomach, especially in surgeries on the lesser curvature of the stomach, because the bending radius of the endoscope is too small, and the endoscope often cannot reach the target area after bending. This component can add a second bending function to the therapeutic endoscope to achieve assisted bending.

[0024] The second connecting segment 22 is connected to the catheter at its proximal end; Multiple segments 23 are disposed between the first connecting segment 21 and the second connecting segment 22. The first connecting segment 21, the second connecting segment 22, and the multiple segments 23 can be made of soft materials, specifically plastic, silicone, TPU, PE, Pebax, etc., and are formed by injection molding, reducing processing steps and lowering manufacturing costs. The first connecting segment 21, the second connecting segment 22, and the segments 23 can all be cylindrical structures.

[0025] A plurality of rotating components 24 are provided, which respectively rotatably connect the proximal end of the first connecting segment 21 to the distal end of its adjacent segment 23, between adjacent segments 23, and between the distal end of the second connecting segment 22 and the proximal end of its adjacent segment 23. Each rotating component 24 includes two oppositely arranged outer cantilever arms 241, each fixedly connected to one end of a segment 23; two oppositely arranged inner cantilever arms 242, each fixedly connected to the other end of a segment 23; and at least one rotating shaft 243. The at least one rotating shaft 243 is perpendicularly fixed to the inner cantilever arm 242 and its axial direction is away from the central axis of the segment 23. The outer cantilever arm 241 has a rotating hole 244 that rotatably engages with the rotating shaft 243. The inner cantilever arm 242 and the outer cantilever arm 241 can be arc-shaped structures. When the inner and outer rotating arms are connected to both ends of a segment, they can be at any position between 0° and 90°, so that the second connecting segment has a spiral structure when bending from its start to its end.

[0026] When the rotating component 24 is connected, the outer cantilever 241 is deformed to rotate the rotating shaft 243 and the rotating hole 244 into a rotating fit.

[0027] By allowing the outer cantilever 241 to elastically deform, such as slightly opening, the pivot 243 on the inner cantilever 242 can be inserted into the pivot hole 244 of the outer cantilever 241, enabling quick plug-and-play assembly without complex tools, thus reducing manufacturing and maintenance costs. After assembly, the outer cantilever 241 returns to its original shape, and the pivot 243 forms a stable rotational fit with the pivot hole 244. The deformation and reset of the outer cantilever 241 provides lateral constraint on the pivot 243, preventing it from falling off and ensuring structural strength during rotation. This provides a stable center of rotation, ensuring precise motion transmission and reducing backlash. The rotating component 24, with its cantilever and pivot 243 structure, occupies little space and is suitable for miniaturized applications.

[0028] In this embodiment, please refer to Figure 2 or Figure 4 The inner cantilever 242, the outer cantilever 241, the rotating shaft 243 and the segment 23 are injection molded, which reduces production costs, simplifies the process, and improves structural reliability and strength.

[0029] In this embodiment, please refer to Figure 3 and Figure 4 The two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and form an H-shaped structure within the same cross section. This optimizes stress distribution so that the bending directions of the multiple segments 23 are two opposite bending directions. When adjacent segments 23 are connected by a rotating member 24, they can bend in two opposite directions around the axis of the H-shaped structure, forming a controllable flexible deflection, thereby improving operational accuracy and ensuring balanced stress distribution.

[0030] In this embodiment, please refer to Figure 1 and Figure 2 Two outer cantilever arms 241 and two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and are staggered circumferentially on the segment 23, that is, circumferentially different by 90 degrees, so that the bending directions of the multiple segments 23 are four directions. By the staggered outer cantilever arms 241 and inner cantilever arms 242 of each rotating component 24, two mutually perpendicular rotation axes are formed, so that a single segment 23 can bend in opposite directions around these two axes, thereby realizing four-way bending motion, maintaining structural compactness. After multiple segments 23 are connected in series through the same staggered outer cantilever arms 241 and inner cantilever arms 242 structure, the four bending directions of each segment 23 are superimposed, which can realize the flexible turning of the overall structure in three-dimensional space, so that more complex turning actions can be completed in narrow spaces with multiple inflection points, improving the environmental adaptability of the device.

[0031] In this embodiment, please refer to Figure 5 The first connecting segment 21 and the second connecting segment 22 have a limiting ring 27 in the circumferential direction.

[0032] In this embodiment, please refer to Figure 5 It also includes a woven mesh, which is sleeved on the outside of the first connecting segment 21, the second connecting segment 22 and the plurality of segments 23, and is located between the limiting rings 27 of the first connecting segment 21 and the second connecting segment 22; Alternatively, it may also include a rubber tube 28, which is sleeved on the outside of the first connecting segment 21, the second connecting segment 22 and the plurality of segments 23, and is located between the limiting rings 27 of the first connecting segment 21 and the second connecting segment 22; Alternatively, it may also include a braided mesh and a rubber tube 28. The braided mesh is sleeved on the outside of the first connecting segment 21, the second connecting segment 22, and the plurality of segments 23. The rubber tube 28 is sleeved on the outside of the braided mesh and located between the limiting rings 27 of the first connecting segment 21 and the second connecting segment 22. The braided mesh and the rubber tube 28 can be fixed to the outer walls of the first connecting segment 21, the second connecting segment 22, and the plurality of segments 23 by means of bonding or interference fit. By providing a braided mesh, a rubber tube 28, or a combination of a braided mesh and a rubber tube 28 on the outside of the first connecting segment 21, the second connecting segment 22, and the plurality of segments 23, the structural strength of the bending assembly is increased.

[0033] In this embodiment, please refer to Figure 2 A reinforcing arm 245 is provided between the opposing inner cantilever arms 242. The reinforcing arm 245 is a rod-shaped or column-shaped structure. The design of the reinforcing arm 245 improves the deformation resistance of the inner cantilever arms 242 and enhances the support stability of the pivot 243.

[0034] In this embodiment, please refer to Figure 2 The first connecting segment 21, the second connecting segment 22, and the plurality of segments 23 each have a through-hole 25 along their own central axis. The through-hole 25 is used for the passage of wires that control the operating components at the tip of the surgical instrument. When used in gastric surgery, especially in the lesser curvature, where the bending radius of the endoscope is too small, the endoscope often cannot reach the target area after bending. This component adds a second bending function to the therapeutic endoscope, enabling assisted bending. Specifically, without a catheter, the endoscope is inserted through the through-holes in the first connecting segment, the second connecting segment, and the plurality of segments along their own central axis.

[0035] In this embodiment, please refer to Figure 5It also includes a bending power component 29, which drives the plurality of segments 23 to undergo bending deformation. The bending power component 29 can be a filamentary structure made of metal, such as steel wire or tungsten wire, or a traction cable made of polymer material; wherein the proximal end of the bending power component 29 is connected to the adjustment component, and the distal end is connected to the second connecting segment 22; the first connecting segment 21, the second connecting segment 22, and the plurality of segments 23 all have through wire holes 26 along their own axial direction; the wire holes 26 and the threading holes 25 both pass through the reinforcing arm 245.

[0036] When the two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and form an H-shaped structure in the same cross section, there are two wire holes 26. The two wire holes 26 and the two outer cantilever arms 241 are spaced apart. At this time, the bending directions of the multiple segments 23 are two opposite bending directions.

[0037] When the two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and are spaced apart in the circumferential direction of the segment 23, there are four wire holes 26. The four wire holes 26 are spaced apart in the circumferential direction, so that the multiple segments 23 can bend smoothly in four bending directions.

[0038] In this embodiment, please refer to Figures 1 to 5 An endoscopic surgical instrument, including the aforementioned bending assembly.

[0039] Working principle: During assembly, the outer cantilever 241 undergoes elastic deformation, such as slightly opening, so that the rotating shaft 243 on the inner cantilever 242 can be inserted into the rotating hole 244 of the outer cantilever 241. After assembly, the outer cantilever 241 returns to its original shape, and the rotating shaft 243 and the rotating hole 244 form a stable rotational fit.

[0040] When the two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and form an H-shaped structure in the same cross section, there are two wire holes 26. The two wire holes 26 and the two outer cantilever arms 241 are spaced apart. At this time, the bending directions of the multiple segments 23 are two opposite bending directions.

[0041] When the two outer cantilever arms 241 and the two inner cantilever arms 242 are respectively fixed to both ends of the segment 23 and are spaced apart in the circumferential direction of the segment 23, there are four wire holes 26. The four wire holes 26 are spaced apart in the circumferential direction, so that the multiple segments 23 can bend smoothly in four bending directions.

[0042] In summary, this invention allows the outer cantilever 241 to undergo elastic deformation, such as slight opening, enabling the rotating shaft 243 on the inner cantilever 242 to embed into the rotating hole 244 of the outer cantilever 241. This allows for quick plug-and-play assembly without complex tools, reducing manufacturing and maintenance costs. After assembly, the outer cantilever 241 returns to its original shape, and the rotating shaft 243 forms a stable rotational fit with the rotating hole 244. The deformation and reset of the outer cantilever 241 provides lateral constraint on the rotating shaft 243, preventing it from falling off and ensuring structural strength during rotation. This provides a stable center of rotation, ensuring precise motion transmission and reducing backlash. The rotating component 24, with its cantilever and rotating shaft 243 structure, occupies little space and is suitable for miniaturized applications. Therefore, this invention effectively overcomes the various shortcomings of existing technologies and has high industrial applicability.

[0043] The above embodiments are merely illustrative of the principles and effects of this utility model and are not intended to limit the scope of this utility model. Any person skilled in the art can modify or alter the above embodiments without departing from the spirit and scope of this utility model. Therefore, all equivalent modifications or alterations made by those skilled in the art without departing from the spirit and technical concept disclosed in this utility model should still be covered by the claims of this utility model.

Claims

1. A bending adjustment component, characterized in that, include: The first connecting segment is located at the distal end of the surgical instrument; The second connecting segment, the proximal end of which is connected to the catheter; Multiple segments, wherein the multiple segments are disposed between the first connecting segment and the second connecting segment; A plurality of rotating components are provided, which respectively rotatably connect the proximal end of the first connecting segment to the distal end of the segment adjacent to it, between adjacent segments, and between the distal end of the second connecting segment and the proximal end of the segment adjacent to it. Each rotating component includes two oppositely arranged outer cantilever arms, each fixedly connected to one end of the segment, two oppositely arranged inner cantilever arms, each fixedly connected to the other end of the segment, and at least one rotating shaft. At least one rotating shaft is perpendicularly fixed to the inner cantilever arm, and the outer cantilever arm has a rotating hole that rotatably engages with the rotating shaft. When the rotating component is connected, the outer cantilever is deformed to rotate the shaft and the rotating hole together.

2. The bending adjustment component according to claim 1, characterized in that: The inner cantilever, the outer cantilever, the pivot, and the segment are formed by injection molding.

3. The bending adjustment component according to claim 1, characterized in that: The two outer cantilever arms and the two inner cantilever arms are respectively fixed to both ends of the segment and are located in the same cross section to form an H-shaped structure, so that the bending directions of the multiple segments are two opposite bending directions.

4. The bending adjustment component according to claim 1, characterized in that: The two outer cantilever arms and the two inner cantilever arms are respectively fixed to both ends of the segment and are staggered at intervals in the circumferential direction of the segment so that the bending direction of the multiple segments is four directions.

5. The bending adjustment assembly according to claim 1, characterized in that: Both the first connecting segment and the second connecting segment have circumferential limiting rings.

6. The bending adjustment assembly according to claim 5, characterized in that: It also includes a woven mesh, which is sleeved on the outside of the first connecting segment, the second connecting segment and the plurality of segments, and located between the limiting rings of the first connecting segment and the second connecting segment; Alternatively, it may also include a rubber tube, which is sleeved on the outside of the first connecting segment, the second connecting segment, and the plurality of segments, and located between the limiting rings of the first connecting segment and the second connecting segment; Alternatively, it may also include a braided mesh and a rubber tube, with the braided mesh sleeved on the outside of the first connecting segment, the second connecting segment, and the plurality of segments, and the rubber tube sleeved on the outside of the braided mesh and located between the limiting rings of the first connecting segment and the second connecting segment.

7. The bending adjustment component according to claim 1, characterized in that: A reinforcing arm is provided between the relatively opposite inner cantilever arms.

8. The bending adjustment assembly according to claim 1, characterized in that: The first connecting segment, the second connecting segment, and the plurality of segments each have through holes along their own central axis.

9. The bending assembly according to any one of claims 1-8, characterized in that: It also includes a bending power component, which is used to drive the multiple segments to undergo bending deformation.

10. An endoscopic surgical instrument, characterized in that: Includes the bending adjustment component as described in any one of claims 1-9.

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