Electrosurgical hook and surgical robot

Abstract

The utility model discloses an electric hook and surgical robot, the electric hook of the utility model includes insulating heat insulating spare, conducting heating spare and power supply wire, conducting heating spare includes with insulating heat insulating spare connection's intermediate part and with the flat connecting portion of one end connection of intermediate part, the length of flat connecting portion is less than the length of intermediate part in the first direction, and the locating plane has on flat connecting portion, and the locating plane is perpendicular to the first direction, the power supply wire is electrically connected with flat connecting portion. The utility model discloses electric hook effectively solved the positioning deviation problem when electric hook end metal injection moulding, significantly improved the assembly accuracy of insulating heat insulating spare and conducting heating spare, and reduced the design difficulty of injection mould.

Description

Technical Field

[0001] The embodiments of this utility model relate to the field of surgical robot technology, and particularly to an electric hook and a surgical robot. Background Technology

[0002] Laparoscopic surgery is a newly developed minimally invasive technique and an inevitable trend in the future development of surgical methods. The monopolar electrocautery hook, as a basic instrument in its accompanying surgical apparatus, has a metal distal end. One end of this metal end connects to an electrical wire, while the other end contacts the human tissue. When energized, it generates a high-temperature coagulation effect on the contacted tissue surface, effectively burning and sealing blood vessels to prevent bleeding. In addition to the metal distal end of the electrocautery hook, the instrument has other adjacent metal mechanisms that must be insulated from the distal end of the electrocautery hook. Otherwise, if these mechanisms are also energized, accidental contact with tissue could cause unintended burns, leading to patient injury.

[0003] Due to the small size of the electric hook's end, two problems easily arise during its production and use. First, the limited welding space at the connection between the wire and the end metal component makes the welded joint prone to detachment upon impact. Second, during the injection molding process of wrapping the end metal component with thermal insulation, misalignment during injection molding can lead to displacement or deflection. Furthermore, after injection molding, the lack of a fixed connection between the thermal insulation component and the end metal component makes it prone to detachment. Currently, no simple structure can be found on the market that can solve these problems at a relatively low cost. Utility Model Content

[0004] The technical problem to be solved by this utility model is to overcome the defects in the prior art and provide an electric hook and surgical robot.

[0005] The present invention solves the above-mentioned technical problems through the following technical solution:

[0006] An electric hook, comprising:

[0007] Insulating and heat-insulating components;

[0008] A conductive heating element includes an intermediate portion connected to an insulating heat-insulating element and a flat connecting portion connected to one end of the intermediate portion. The length of the flat connecting portion in a first direction is less than the length of the intermediate portion. The flat connecting portion has a positioning plane that is perpendicular to the first direction.

[0009] The power supply line is electrically connected to the flat connector.

[0010] In some embodiments, the length of the flat connecting portion in the second direction is greater than the length of the middle portion, and the second direction is perpendicular to the first direction.

[0011] In some embodiments, it also includes:

[0012] A pair of fasteners are installed inside the insulating and heat-insulating component and are symmetrically located on both sides of the central axis;

[0013] A pair of traction components are fixedly connected to the fixing components.

[0014] In some embodiments, the middle portion is mounted at the center of the insulating and heat-insulating member.

[0015] In some embodiments, the conductive heating element further includes:

[0016] The hook-shaped part has one end connected to the other end of the insulating and heat-insulating component, and the other end of the hook-shaped part is bent in a third direction.

[0017] In some embodiments, the plane containing the third direction coincides with or is parallel to the plane containing the first direction.

[0018] In some embodiments, the plane containing the third direction is perpendicular to the plane containing the first direction.

[0019] In some embodiments, the flat connecting portion is rectangular, and the positioning plane is a rectangular plane.

[0020] In some embodiments, the flat connector is provided with a connection position, and one end of the power supply line is fixed to the connection position.

[0021] In some embodiments, the connection location is a connection groove provided on one side of the flat connection portion.

[0022] In some embodiments, the connection location is a connection hole located near the center of the flat connection portion.

[0023] In some embodiments, one end of the power supply line is fixed to the connection point by welding.

[0024] In some embodiments, the conductive heating element is an integral structure.

[0025] A surgical robot comprising the aforementioned electric hook.

[0026] Based on common knowledge in the field, the above-mentioned preferred conditions can be combined arbitrarily to obtain various preferred embodiments of this utility model.

[0027] The positive and progressive effects of this utility model are as follows: This disclosure effectively solves the positioning offset problem during injection molding of the metal part at the end of the electric hook, significantly improves the assembly accuracy of the insulating and heat-insulating parts and the conductive heating parts, and reduces the design difficulty of the injection mold. Attached Figure Description

[0028] Figure 1 This is a side view of the conductive heating element of Example 1.

[0029] Figure 2 This is a front view of the conductive heating element in Example 1.

[0030] Figure 3 It shows Figure 2 The state when the connecting groove is replaced with a connecting hole.

[0031] Figure 4 The installation location of the traction component is shown.

[0032] Figure 5 This is a side view of the conductive heating element in Example 2.

[0033] Figure 6 This is a front view of the conductive heating element in Example 2.

[0034] Explanation of reference numerals in the attached figures:

[0035] Insulating and heat-insulating component 1

[0036] Conductive heating element 2

[0037] Middle section 21

[0038] Flat connecting part 22

[0039] Positioning plane 221

[0040] Hook-shaped part 23

[0041] Traction component 3

[0042] Connecting slot 4

[0043] Connection hole 5 Detailed Implementation

[0044] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. The following description of at least one exemplary embodiment is merely illustrative and is in no way intended to limit the present utility model or its application or use. All other embodiments obtained by those skilled in the art based on the embodiments of the present utility model without creative effort are within the scope of protection of the present utility model.

[0045] It should be noted that in the claims and specification of this patent, relational terms such as "first" and "second" are used merely to distinguish one entity or operation from another, and do not necessarily require or imply any such actual relationship or order between these entities or operations. Furthermore, the terms "comprising," "including," or any other variations thereof are intended to cover non-exclusive inclusion, such that a process, method, article, or apparatus that comprises a list of elements includes not only those elements but also other elements not expressly listed, or elements inherent to such a process, method, article, or apparatus. Without further limitations, an element defined by the phrase "comprising one" does not exclude the presence of other identical elements in the process, method, article, or apparatus that includes the element.

[0046] In existing technologies, the monopolar electric hooks in laparoscopic surgical instruments suffer from a problem where the narrow welding space at the connection between the end metal part and the power supply line makes the joint prone to detachment. During injection molding, the lack of an effective positioning structure between the insulating heat insulation component 1 and the conductive heating component 2 makes them prone to displacement or deflection. Existing solutions attempt to improve connection stability through complex mechanical structures or local recessed features, but these suffer from drawbacks such as high difficulty in component assembly and insufficient tensile strength, making reliable fixation impossible within a limited space.

[0047] To address the aforementioned issues, and considering the unstable injection molding positioning of the metal part at the end of the electric hook and the insulating heat insulation component 1, it was found that the cylindrical metal part is difficult to constrain its direction during injection molding, leading to insufficient mold positioning accuracy. Further analysis revealed that modifying the structure of the connection part to form a positionable planar feature can effectively improve the directional stability during injection molding. Simultaneously, increasing the surface area of ​​the welding area of ​​the power supply line can reduce the probability of the weld joint detaching due to impact.

[0048] Example 1

[0049] like Figures 1-4 As shown, this disclosure proposes an electric hook comprising an insulating heat-resistant component 1, a conductive heating component 2, and a power supply line. The electric hook of this disclosure can be used in surgical robots for surgeons to operate on for minimally invasive surgery.

[0050] The insulating and heat-insulating component 1 refers to the component that wraps around the conductive heating component 2 and achieves electrical and thermal isolation. Specifically, it can be made of high-temperature resistant engineering plastic through injection molding process, and its interior forms a cavity structure that matches the shape of the conductive heating component 2.

[0051] The conductive heating element 2 includes an intermediate portion 21 connected to the insulating heat insulation element 1 and a flat connecting portion 22 connected to one end of the intermediate portion 21. The length of the flat connecting portion 22 in a first direction is less than the length of the intermediate portion 21. The flat connecting portion 22 has a positioning plane 221, which is perpendicular to the first direction. The intermediate portion 21 of the conductive heating element 2 refers to a columnar structure connected to the main body of the insulating heat insulation element 1. Specifically, it can be made of metal rod and is used to maintain the axial stability of the conductive heating element 2.

[0052] The flat connecting part 22 refers to the sheet-like structure formed by rolling or forging at the end of the conductive heating element 2. Specifically, the cylindrical metal end can be processed into a flat shape by stamping process, and the stepped structure formed by its reduced length provides a positioning reference for the injection mold.

[0053] The positioning plane 221 refers to the flat area formed by the stepped structure surface of the flat connecting part 22. This plane contacts the positioning surface of the injection mold to restrict the rotation of the conductive heating element 2 during the injection molding process.

[0054] The power supply line is electrically connected to the flat connector 22.

[0055] Specifically, the flat connecting portion 22 of the conductive heating element 2 forms a sheet-like structure with reduced thickness by reducing its dimension in the first direction. Its positioning plane 221, perpendicular to the first direction, serves as a positioning reference surface during injection molding. During injection molding, the positioning plane 221 restricts the displacement and deflection of the conductive heating element 2 as it is filled with liquid plastic. Power lines can be welded to the surface of the flat connecting portion 22. In this disclosure, welding (laser welding, resistance welding, or soldering) is used to form a continuous intermetallic compound layer, resulting in minimal contact resistance and reduced heat loss. Furthermore, because the sheet-like structure has a larger surface area in the second direction, the welding area avoids the constraints of narrow spaces, forming a more robust electrical connection.

[0056] Compared to existing technologies, traditional solutions rely on the friction between the cylindrical metal part and the insulating material for fixation. This solution, however, actively provides a positioning reference through the geometric features of the flat connecting part 22, fundamentally improving injection molding accuracy. Compared to structures using recessed fits, the planar positioning method of the flat connecting part 22 eliminates the need for complex surface machining on the metal part, avoiding the risk of breakage due to localized strength reduction.

[0057] Through the above technical solution, this disclosure effectively solves the positioning misalignment problem during injection molding of the metal part at the end of the electric hook, significantly improves the assembly accuracy of the insulating and heat-insulating part 1 and the conductive heating part 2, and reduces the design difficulty of the injection mold. The expanded surface area of ​​the flat connecting part 22 increases the operating space for welding the power supply line, reducing the possibility of power supply line connection failure due to machine movement.

[0058] This disclosure further proposes that the length of the flat connecting portion 22 in the second direction is greater than the length of the intermediate portion 21, and the second direction is perpendicular to the first direction.

[0059] Specifically, the flat connecting portion 22 expands laterally to form a plate-like structure wider than the middle portion 21, creating a larger contact area with the insulating and heat-insulating component 1 during injection molding. When the mold applies pressure to the positioning plane 221, the expanded lateral dimension effectively resists the flow impact of the injection molding material, preventing the conductive heating component 2 from deflecting.

[0060] Through the above technical solution, this disclosure simultaneously achieves expanded welding contact area and improved injection molding positioning stability within a limited space. The laterally extended flat connecting part 22 provides a larger contact area for power line welding. The irregular cross-sectional structure creates a three-dimensional constraint between the conductive heating element 2 and the insulating heat insulation element 1, effectively preventing the conductive heating element 2 from detaching from the insulating heat insulation element 1, forming a more stable and robust bond.

[0061] This disclosure further proposes that the electric hook also includes a pair of fixing members and a pair of traction members 3.

[0062] A pair of fasteners are installed inside the insulating and heat-insulating component 1 and are symmetrically located on both sides of the axis of the middle part 21. The fasteners are rigid components embedded inside the insulating and heat-insulating component 1 and connected to the traction component 3, and can be implemented using metal inserts.

[0063] A pair of traction components 3 are fixedly connected to the fixing components. The traction component 3 refers to a flexible component that is rigidly connected to the fixing component. Specifically, it can be implemented using tungsten wire. After being connected to the fixing component, it forms an axial constraint on the conductive heating component 2, preventing the conductive heating component 2 from falling off the insulating and heat-insulating component 1 after injection molding.

[0064] Through the above technical solution, the present disclosure symmetrically distributes the fixing component and the traction component 3 on both sides of the axis of the middle part 21, which makes it easier for the traction component 3 to control the deflection direction of the conductive heating component 2 and improves the control accuracy.

[0065] This disclosure further proposes that the middle part 21 of the conductive heating element 2 is installed at the center of the insulating heat insulation element 1.

[0066] The central position refers to the area where the geometric symmetry center point of the insulation and heat insulation component 1 is located. Specifically, it can be achieved through the positioning structure of the injection mold, so that the axis of the middle part 21 coincides with the central axis of the insulation and heat insulation component 1.

[0067] Specifically, during the injection molding process, the intermediate portion 21 is constrained at the center of the insulating and heat-insulating component 1, so that the injection molding material forms a symmetrically distributed wrapping layer around the intermediate portion 21 during filling. The resulting uniform constraint force prevents the intermediate portion 21 from shifting in the axial or circumferential direction.

[0068] Compared to existing technologies, the metal parts at the end of current electric hooks typically employ asymmetrical constraints during injection molding, resulting in uneven thickness of the injection molding material coating and a tendency for stress concentration to cause displacement or rotation. This solution, through a centrally symmetrical positioning structure, ensures that the conductive heating element 2 remains in a state of stress balance throughout the injection molding process.

[0069] Through the above technical solution, this disclosure solves the problem of unstable positioning of the conductive heating element 2 during the injection molding process, while enhancing the connection reliability between the insulating and heat-insulating element 1 and the conductive heating element 2, avoiding the risk of connection failure caused by stress concentration on one side, and compared with the traditional eccentrically set conductive heating element 2, this disclosure can reduce the obstruction of the field of vision by the conductive heating element 2, making it easier for doctors to perform surgery.

[0070] This disclosure further proposes that the conductive heating element 2 also includes a hook-shaped portion 23.

[0071] One end of the hook-shaped part 23 is connected to the other end of the middle part 21, and the other end of the hook-shaped part 23 is bent in a third direction.

[0072] The hook-shaped part 23 refers to the curved structure formed at the end of the conductive heating element 2. It can be achieved by a one-piece metal forming process. By bending it to form a specific angle, it enhances the mechanical connection with the insulating and heat-insulating element 1. The third-direction bending refers to the spatial bending direction formed by the end of the hook-shaped part 23 relative to the main axis of the insulating and heat-insulating element 1. It can be achieved by stamping or hot bending processes. The bending direction is complementary to the direction of force applied during the operation of the electric hook, so as to facilitate the operation of the electric hook.

[0073] This disclosure further proposes that the plane containing the third direction coincides with or is parallel to the plane containing the first direction.

[0074] Through the above technical solution, during the injection molding process, when the hook-shaped part 23 bends along the third direction, its bending plane and the positioning plane 221 of the flat connecting part 22 remain coplanar or parallel. The movement planes of the hook-shaped part 23 and the flat connecting part 22 are consistent, which can ensure that the torsional stress borne by the flat connecting part 22 is evenly distributed when the electric hook is in operation, and prevent it from loosening and falling off.

[0075] This disclosure further proposes that the length of the flat connecting portion 22 in the first direction is 0.6 to 0.8 mm, the flat connecting portion 22 is rectangular, the positioning plane 221 is a rectangular plane, and the length of the rectangular plane in the second direction is 1.2 to 1.5 mm.

[0076] Through the above technical solution, this disclosure effectively prevents the displacement or deflection of the conductive heating element 2 during injection molding, ensuring the relative positional accuracy of the insulating and heat-insulating element 1 and the conductive heating element 2. The stable contact surface provided by the rectangular plane enhances the impact resistance of the welded joint and reduces the risk of breakage and detachment caused by instrument movement. The dimensional constraints in both directions ensure that the conductive heating element 2 maintains a fixed posture after injection molding, avoiding instrument failure caused by assembly errors.

[0077] This disclosure further proposes that the flat connecting part 22 is provided with a connection position, and one end of the power supply line is fixed to the connection position. The connection position refers to a specific area on the flat connecting part 22 used to fix the power supply line, which can be achieved by machining a connection groove 4 or a connection hole 5 on the surface of the flat connecting part 22. This area increases the contact area between the power supply line and the metal part through a planar structure, avoiding insufficient connection strength due to narrow space. Through the above technical solution, this disclosure solves the problem of easy joint detachment caused by narrow welding space at the connection between the wire and the metal part at the end of the hook.

[0078] This disclosure further proposes a connecting groove 4 located on one side of the flat connecting portion 22 as the connection position.

[0079] The connecting groove 4 refers to a structure that communicates with the outside world on one side. This disclosure provides the connecting groove 4 as a connection point. The groove structure guides the precise positioning of the power supply line, simplifies the alignment operation before welding, and improves production efficiency. Furthermore, the connecting groove 4 provides additional physical support for the power supply line, avoiding reliance solely on the welding point for stress, thereby increasing the tensile strength of the connection.

[0080] This disclosure further proposes that the connection position can also be a connection hole 5 located near the middle of the flat connection portion 22.

[0081] With the above technical solution, the connection hole 5 of this disclosure is located in the middle of the flat connection part 22, which can further increase the connection area between the power supply line and the flat connection part 22 and further improve the connection strength.

[0082] This disclosure further proposes that the conductive heating element 2 is a one-piece structure, namely, the hook-shaped part 23, the middle part 21, and the flat connecting part 22 are integrally formed. This one-piece forming eliminates any intermediate interfaces such as riveting, welding points, or threaded connections. Current and heat are conducted along the same solid body, resulting in near-zero contact resistance and maximum heating efficiency, while avoiding material fatigue caused by localized hot spots. Furthermore, the one-piece design is seamless and weld-free, reducing mechanical weaknesses and significantly improving resistance to bending and torsion.

[0083] Example 2

[0084] The difference between this embodiment and Embodiment 1 is that:

[0085] like Figure 5 and Figure 6 As shown, this disclosure further proposes that the plane containing the third direction is perpendicular to the plane containing the first direction.

[0086] Specifically, the bending direction of the hook-shaped portion 23 is orthogonal to the positioning plane 221 of the flat connecting portion 22. During injection molding, the positioning plane 221 of the flat connecting portion 22 is constrained within a plane perpendicular to the first direction. The orthogonally bent hook-shaped portion 23 forms a spatial limit with the insulating and heat-insulating component 1, preventing the metal part from rotating or shifting during injection molding. Simultaneously, the minimum distance between the traction component 3 and the flat connecting portion 22 is increased due to the orthogonal arrangement, making it less likely for short circuits to occur between the traction component 3 and the flat connecting portion 22, thereby improving insulation reliability.

[0087] This solution, through orthogonal design, further expands the distance between the traction component 3 and the flat connecting part 22 while maintaining the positioning accuracy of injection molding. This avoids insulation failure caused by insufficient distance between the traction component 3 and the flat connecting part 22, thereby improving the structural stability and safety of the electric hook device.

[0088] Everything else is the same as in Example 1, and will not be repeated here.

Claims

1. An electrical hook, characterized in that, include: Insulating and heat-insulating components; A conductive heating element includes an intermediate portion connected to the insulating heat insulation element and a flat connecting portion connected to one end of the intermediate portion. The length of the flat connecting portion in a first direction is less than the length of the intermediate portion. The flat connecting portion has a positioning plane, which is perpendicular to the first direction. The power supply line is electrically connected to the flat connector.

2. The electric hook as described in claim 1, characterized in that, The length of the flat connecting portion in the second direction is greater than the length of the middle portion, and the second direction is perpendicular to the first direction.

3. The electric hook of claim 1, wherein, Also includes: A pair of fasteners are installed inside the insulating and heat-insulating component and are symmetrically located on both sides of the central axis; A pair of traction components are fixedly connected to the fixing component.

4. The electric hook as described in claim 3, characterized in that, The middle part is installed at the center of the insulating and heat-insulating component.

5. The electric hook as described in claim 1, characterized in that, The conductive heating element further includes: The hook-shaped part has one end connected to the other end of the insulating and heat-insulating component, and the other end of the hook-shaped part is bent in a third direction.

6. The electric hook as described in claim 5, characterized in that, The plane containing the third direction coincides with or is parallel to the plane containing the first direction.

7. The electric hook as described in claim 5, characterized in that, The plane containing the third direction is perpendicular to the plane containing the first direction.

8. The electric hook of claim 7, wherein, The flat connecting part is rectangular, and the positioning plane is a rectangular plane.

9. The electric hook of claim 1, wherein, The flat connector is provided with a connection position, and one end of the power supply line is fixed to the connection position.

10. The electric hook as described in claim 9, characterized in that, The connection location is a connection groove located on one side of the flat connection portion.

11. The electric hook as described in claim 9, characterized in that, The connection position is a connection hole located near the middle of the flat connection part.

12. The electric hook of claim 9, wherein, One end of the power supply line is fixed to the connection point by welding.

13. The electric hook as described in claim 5, characterized in that, The conductive heating element is an integral structure.

14. A surgical robot, characterized in that, Including the electric hook as described in any one of claims 1-13.

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