Clamp head opening and closing linkage control assembly and endoscopic surgery needle holder using same

Abstract

The utility model discloses a kind of jaw opening and closing linkage control components and the needle holder forceps for endoscopic surgery using it, comprising: linkage pull rod, and the bar length adjusting group connected with linkage pull rod;Linkage pull rod at least includes a section of zigzag elastic rod;Bar length adjusting group includes the double-end threaded component screwing with the near hand end of linkage pull rod, and the control pull rod screwing with the end of double-end threaded component away from linkage pull rod;When double-end threaded component rotates along first direction, the relative distance between linkage pull rod and control pull rod shortens to make the total length of bar length adjusting group decrease;When double-end threaded component rotates along second direction opposite with the rotation direction of first direction, the relative distance between linkage pull rod and control pull rod increases to make the total length of bar length adjusting group increase.The utility model can ensure the effectiveness of needle holder by the cooperation of linkage pull rod and bar length adjusting group, while avoiding strong force clamping to accelerate the failure of needle holder and avoiding excessive clamping injury suture needle, improve its safety in use.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, and in particular to a forceps head opening and closing linkage control component and a needle holder for laparoscopic surgery using the same. Background Technology

[0002] Endoscopic needle holders are commonly used in laparoscopic surgery to hold suture needles or sutures for suturing, ligation, and other procedures. Each suture needle has a specific range of clamping force required. Insufficient clamping force may result in unreliable needle displacement or even detachment, while excessive clamping force can deform the needle, causing burrs and rendering it unusable. Therefore, precise control of the clamping force is crucial during needle holder use. The closing force of the forceps directly affects the reliability of needle holding, the degree of damage to the needle during clamping, and the lifespan of the needle holder.

[0003] For example, CN221013354U discloses an angle-controllable multi-groove needle holder and its needle-holding part, which includes a needle-holding part, a control part, and an operating part. The control part is connected between the needle-holding part and the operating part, and controls the opening and closing of the first and second needle-holding ends of the needle-holding part through the operation of the control part and the operating part. The control part includes a front control lever, a rear control lever, an elastic element, a control seat, and a pull rod connector. The control seat is disposed in the operating part, the pull rod connector is connected between the rear control lever and the operating part, the front control lever is connected between the connecting end and the elastic element, and the rear control lever is connected between the elastic element and the control seat. Through the operating part, under the action of the pull rod connector and the elastic element, the first and second needle-holding ends open and close with the movement of the front control lever. For this disclosed technology, although the design of the elastic element can improve the gentleness of the needle-holding part's operation, the overall control part structure is complex, consisting of multiple components, and these components need to cooperate. Therefore, in order to balance improving the softness of the needle holding part and simplifying the structure of the control part, further optimization of the control part structure is needed.

[0004] Therefore, the control structure for opening and closing the pliers head needs further improvement to optimize the overall performance of the needle holder. Utility Model Content

[0005] The primary objective of this invention is to provide a clamp opening and closing linkage control component to solve the technical problem of optimizing the overall structure of the clamp opening and closing control lever.

[0006] The second objective of this invention is to provide a needle holder for laparoscopic surgery to solve the technical problem of optimizing the performance of the needle holder.

[0007] The clamp opening and closing linkage control component of this utility model is implemented as follows:

[0008] A clamp opening and closing linkage control component includes: a linkage lever, and a lever length adjustment group connected to the linkage lever;

[0009] The linkage rod includes at least one segment of tortuous elastic rod; the tortuous elastic rod includes multiple continuously arranged curved rod segments; and

[0010] The rod length adjustment assembly includes a double-threaded component that engages with the threaded end of the linkage rod near the hand, and a control rod that engages with the threaded end of the double-threaded component away from the linkage rod.

[0011] When the double-threaded component rotates in the first direction, the relative distance between the linkage rod and the control rod shortens, thereby reducing the total length of the rod length adjustment group;

[0012] When the double-threaded component rotates in a second direction opposite to the first direction, the relative distance between the linkage rod and the control rod increases, thereby increasing the total length of the rod length adjustment group.

[0013] In an optional embodiment of this utility model, the linkage rod further includes a straight rod connected to the bendable elastic rod; wherein

[0014] The straight rod is connected to the double-threaded component.

[0015] In an optional embodiment of this utility model, the end of the straight rod away from the bent elastic rod is provided with a first threaded connector;

[0016] The first threaded connector is used to connect to one end of a double-threaded component.

[0017] In an optional embodiment of this utility model, the control lever is provided with a second threaded connector at one end facing the double-threaded component;

[0018] The second threaded connector is used to connect to the other end of the double-threaded component.

[0019] In an optional embodiment of this invention, the double-threaded component has a hollow inner cavity extending axially through both axial ends; and

[0020] The double-ended threaded component has threaded structures inside both shaft ends. One shaft end has a threaded structure for connecting to the first threaded connector, and the other shaft end has a threaded structure for connecting to the second threaded connector.

[0021] In optional embodiments of this invention, each of the curved rod segments is W-shaped or S-shaped.

[0022] The needle holder for laparoscopic surgery of this invention is implemented as follows:

[0023] A needle holder for laparoscopic surgery includes: a needle holding part and a forceps head opening and closing linkage control assembly connected to the needle holding part, and a handle part connected to the proximal end of the forceps head opening and closing linkage control assembly; wherein

[0024] The needle holding part includes a first clamping plate and a second clamping plate that are hinged together and adapted to make relative opening and closing movements.

[0025] The needle-holding part is connected to the end of the linkage rod away from the rod length adjustment group.

[0026] In an optional embodiment of this utility model, toothed clamping elements are respectively provided on the facing end faces of the first clamping plate and the second clamping plate.

[0027] In an optional embodiment of this utility model, each of the toothed clamping members is provided with a plurality of protruding teeth, each protruding tooth being a cone shape formed by a combination of several clamping surfaces, and the tip of each protruding tooth being an arc shape.

[0028] By adopting the above technical solution, this utility model has the following beneficial effects: The clamp head opening and closing linkage control component and the laparoscopic surgical needle holder using it, through the combination of the flexible rod and the rod length adjustment group, can not only adjust the elastic coefficient of the flexible rod, but also adjust the working length of the clamp head opening and closing linkage control component. Thus, by coordinating the elastic coefficient and the working length, the magnitude of the pulling force transmitted to the needle holding part of the needle holder is adjusted. On the one hand, this ensures that the output pulling force can meet the usage requirements of the suture needle, improves the effectiveness of the needle holder in holding the suture needle, and avoids the failure of the needle holder due to strong clamping and excessive injury to the suture needle through elastic control, thereby improving its safety in use. On the other hand, when the needle holding part releases the suture needle, the operation of the handle part is transmitted to the needle holding part through the elastic buffer of the clamp head opening and closing linkage control component, making the operation smoother and more gentle, while reducing the hand fatigue of medical staff during operation. Attached Figure Description

[0029] Figure 1 This is a schematic diagram of the overall structure of the needle holder for laparoscopic surgery according to Embodiment 2 of this utility model;

[0030] Figure 2 This is a schematic diagram of the opening and closing linkage control component of the needle holder for laparoscopic surgery according to Embodiment 1 of this utility model;

[0031] Figure 3 This is a partial structural diagram of the clamp head opening and closing linkage control component of the laparoscopic surgical needle holder according to Embodiment 1 of this utility model. Figure 1 ;

[0032] Figure 4 This is a partial structural diagram of the clamp head opening and closing linkage control component of the laparoscopic surgical needle holder according to Embodiment 1 of this utility model. Figure 2 ;

[0033] Figure 5 This is a partial structural diagram of the clamp head opening and closing linkage control component of the laparoscopic surgical needle holder according to Embodiment 1 of this utility model. Figure 3 ;

[0034] Figure 6 This is a schematic diagram of the toothed clamping member of the laparoscopic surgical needle holder in Embodiment 3 of this utility model;

[0035] Figure 7 This is an exploded structural diagram of the toothed clamping member and the receiving groove of the laparoscopic surgical needle holder according to Embodiment 4 of this utility model.

[0036] In the figure: First clamping plate 11, second clamping plate 12, receiving groove 13, toothed clamping part 2, handle part 3, sleeve 4, protruding tooth 5, clamping surface 51, arc connecting surface 52, zigzag elastic rod 61, straight rod 62, straight connecting rod 63, first threaded connector 65, double-ended threaded component 7, threaded structure 71, control lever 8, second threaded connector 81, locking nut 9. Detailed Implementation

[0037] To make the contents of this utility model easier to understand, the present utility model will be further described in detail below with reference to specific embodiments and accompanying drawings.

[0038] Example 1:

[0039] Please see Figures 1 to 5 As shown, this embodiment provides a clamp opening and closing linkage control component, including: a linkage lever, and a lever length adjustment group connected to the hand end of the linkage lever.

[0040] Specifically, firstly, the linkage rod includes at least one zigzag elastic rod 61; the zigzag elastic rod 61 comprises multiple continuously arranged curved rod segments. Generally, each curved rod segment is W-shaped or S-shaped. This design, through the design of multiple zigzag rod segments, gives the overall linkage rod a certain degree of elasticity. When the linkage rod is subjected to tension, the zigzag elastic rod can undergo a certain deformation, thereby giving it elastic properties within a certain range.

[0041] Secondly, the rod length adjustment assembly includes a double-threaded component 7 that engages with the threaded end of the linkage rod near the hand, and a control rod 8 that engages with the threaded end of the double-threaded component 7 away from the linkage rod. Furthermore, based on the above, the linkage rod also includes a straight rod 62 connected to the flexible rod 61; wherein the straight rod 62 is connected to the double-threaded component 7.

[0042] For this purpose, the straight rod 62 has a first threaded connector 65 at the end away from the flexible rod 61; the first threaded connector 65 is used to connect to one end of the double-threaded component 7. The control rod 8 has a second threaded connector 81 at the end facing the double-threaded component; the second threaded connector is used to connect to the other end of the double-threaded component 7. Both axial ends of the double-threaded component 7 have threaded structures 71, one axial end's threaded structure 71 is used to connect to the first threaded connector 65, and the other axial end's threaded structure 71 is used to connect to the second threaded connector 81. It should be noted that the double-threaded component 7 here can be in the form of a sleeve (having a hollow inner cavity extending through both shaft ends along its axial direction). The corresponding thread structure 71 is an internal thread located inside the hollow inner cavity, while the first threaded connector 65 and the second threaded connector 81 are both external threads. Of course, it is also possible that the thread structure 71 is an external thread, while the first threaded connector 65 and the second threaded connector 81 are both internal threads, or one of the first threaded connector 65 and the second threaded connector 81 is an internal thread and the other is an external thread. The corresponding thread structure 71 only needs to be compatible with the first threaded connector 65 and the second threaded connector 81. In summary, this embodiment does not make absolute limitations on the internal and external threads of the thread structure 71, the first threaded connector 65, and the second threaded connector 81.

[0043] Based on the above structure, it should be noted that when the double-threaded component 7 rotates in the first direction (e.g., clockwise), the relative distance between the linkage rod and the control rod 8 shortens, thereby reducing the total length of the rod length adjustment group. In other words, both the linkage rod and the control rod 8 move towards the double-threaded component 7 to reduce the total length of the linkage rod, control rod 8, and double-threaded component 7 in the engaged state. When the double-threaded component 7 rotates in the second direction opposite to the first direction (e.g., counterclockwise), the relative distance between the linkage rod and the control rod 8 increases, thereby increasing the total length of the rod length adjustment group. In other words, both the linkage rod and the control rod 8 move away from the double-threaded component 7 to increase the total length of the linkage rod, control rod 8, and double-threaded component 7 in the engaged state. This embodiment does not impose absolute limitations on the specific rotation directions of the first threaded connector 65, the second threaded connector 81, and the two threaded structures 71 inside the double-ended threaded component 7 (for example, the threaded structures 71 at the two axial ends of the double-ended threaded component 7 are designed with reverse threads). As long as the thread configuration can realize the relative movement of the linkage rod and the control rod 8 when the double-ended threaded component 7 rotates, it can meet the usage requirements of this embodiment.

[0044] In summary, for the clamp opening and closing linkage control component of this embodiment, the magnitude of the output pulling force is affected by both elasticity and length during the transmission of pulling force. By using the flexible elastic rod 61 in conjunction with the rod length adjustment group, not only can the elasticity of the overall clamp opening and closing linkage control component be adjusted, but also the usable length of the clamp opening and closing linkage control component can be adjusted. Thus, the magnitude of the transmitted pulling force is adjusted by the combination of the two dimensions of elasticity and usable length.

[0045] Example 2:

[0046] Please see Figures 1 to 5 As shown, based on the clamp opening and closing linkage control component of Embodiment 1, this embodiment provides a needle holder for laparoscopic surgery, wherein a locking nut 9 is fitted on the second threaded connector 81 or the thread structure 71 of the double-headed threaded component 7 adapted to the second threaded connector 81.

[0047] More specifically, the locking nut 9 here has an internal thread. Therefore, when the second threaded connector 81 has an external thread, the locking nut 9 is fitted onto the second threaded connector 81, and the second threaded connector 81 is locked by tightening the locking nut 9 onto it. When the thread structure 71 of the double-ended threaded component 7 that adapts to the second threaded connector 81 has an external thread, the locking nut 9 is fitted onto the thread structure 71 of the double-ended threaded component 7 that adapts to the second threaded connector 81, and the thread structure 71 of the double-ended threaded component 7 that adapts to the second threaded connector 81 is locked by tightening the locking nut 9 onto it. In both cases, as long as the locking nut 9 is not loosened, the second threaded connector 81 and the double-ended threaded component 7 cannot rotate relative to each other.

[0048] Based on this, in conjunction with the accompanying drawings, this embodiment illustrates an optional scenario: the double-threaded component 7 is a sleeve-like structure, and the thread structure 71 of the double-threaded component 7 that adapts to the second threaded connector 81 is an internal thread, while the second threaded connector 81 is an external thread. The locking nut 9 is adapted to be threadedly engaged with the second threaded connector 81, and when the locking nut 9 and the second threaded connector 81 are tightened to the correct position, the locking nut 9 abuts against the axial end of the double-threaded component 7 facing the second threaded connector 81. In this structure, when it is necessary to rotate the double-threaded component 7, the locking nut 9 is first loosened to release the abutment between the locking nut 9 and the double-threaded component 7, allowing axial movement space for relative rotation between the double-threaded component 7 and the second threaded connector 81. This facilitates rotating the double-threaded component 7 to adjust the relative distance between the linkage rod and the control rod 8. Once the adjustment is complete, the locking nut 9 is tightened to lock the second threaded connector 81, thereby preventing the double-threaded component 7 from being rotated unexpectedly.

[0049] Example 3:

[0050] Please see Figures 1 to 5 As shown, based on the forceps opening and closing linkage control assembly of Embodiment 1 or Embodiment 2, this embodiment provides a needle holder for laparoscopic surgery, including: a needle holding part and the forceps opening and closing linkage control assembly of Embodiment 1 connected to the needle holding part, and a handle part 3 connected to the hand end of the forceps opening and closing linkage control assembly; wherein the needle holding part is connected to the end of the linkage pull rod away from the rod length adjustment group.

[0051] Based on the above structure, it should be noted that the needle-holding part includes a first clamping plate 11 and a second clamping plate 12 hinged together and adapted to perform relative opening and closing movements. For the needle-holding part, its specific implementation principle can adopt any mature means of the prior art, and this embodiment does not impose an absolute limitation on it. The handle part 3 here can adopt any mature means of the prior art, and this embodiment does not impose an absolute limitation on its specific structure and implementation principle, as long as it can realize the push-pull action of the clamp head opening and closing linkage control component, it can meet the usage requirements of this embodiment. It is also understood that a sleeve 4 for connecting the needle-holding part and the handle part 3 is also provided on the outer layer of the linkage rod.

[0052] Based on the above, it should be noted that the linkage rod used in this embodiment also includes a straight connecting rod 63 located at the end of the bent elastic rod 61 away from the straight rod 62. Preferably, the straight connecting rod 63, the bent elastic rod 61, and the straight rod 62 are integrally formed.

[0053] In summary, for the laparoscopic surgical needle holder of this embodiment, the flexible rod combined with the rod length adjustment group not only adjusts the elastic coefficient of the flexible rod 61, but also adjusts the usable length of the forceps head opening and closing linkage control component. Thus, the magnitude of the transmitted tension is adjusted through the combination of the elastic coefficient and the usable length. This ensures, on the one hand, that the output tension meets the requirements of the suture needle, improving the effectiveness of the needle holder in holding the suture needle. Furthermore, the elastic control prevents excessive clamping that could accelerate the failure of the needle holder and avoids excessive injury to the suture needle, improving its safety. On the other hand, when the needle is released from the needle holder, the operation of the handle 3 is transmitted to the needle holder through the elastic buffer of the forceps head opening and closing linkage control component, making the operation smoother and more gentle, while reducing hand fatigue for medical personnel.

[0054] Example 4:

[0055] Please see Figure 6 As shown, based on the laparoscopic surgical needle holder of Embodiment 2, the first clamping plate 11 and the second clamping plate 12 of the laparoscopic surgical needle holder provided in this embodiment are respectively provided with toothed clamping members on their facing end faces. Each toothed clamping member 2 is provided with multiple protruding teeth 5, each protruding tooth 5 is a cone shape formed by combining several clamping surfaces 51, and the tip 53 of each protruding tooth 5 is arc-shaped. Accordingly, the risk of debris material generated during the wear process of the protruding teeth 5 entering the human body can be prevented when the needle holding part is clamping the suture, thus improving the safety of the laparoscopic surgical needle holder of this utility model during use.

[0056] Furthermore, based on the above structure, the connection between two adjacent clamping surfaces 51 on each tooth 5 is set as an arc-shaped connecting surface 52. This reduces the risk of suture breakage.

[0057] Furthermore, an angle is formed between the clamping surface 51 and the plane containing the toothed clamping member 2, with the angle set to 30°–60°. A preferred angle here is 45°, which provides a more stable clamping force. When clamping the object, the clamping force is more evenly distributed on the clamping surface 51, reducing stress concentration and lowering the risk of fatigue cracking or fracture of the material. The evenly distributed clamping force prevents the object from sliding or displacing, while also providing a greater clamping force. Compared to vertical clamping, a 45° angle better utilizes the component of the clamping force, increasing the magnitude of the clamping force to some extent.

[0058] In summary, the needle holder for laparoscopic surgery in this embodiment not only improves the comfort of using the needle holder but also enhances its safety.

[0059] Example 5:

[0060] Please see Figure 7 As shown, based on the laparoscopic surgical needle holder of Embodiment 3, the laparoscopic surgical needle holder provided in this embodiment has receiving grooves 13 on the facing end faces of the first clamping plate 11 and the second clamping plate 12 for accommodating the toothed clamping member 2. Accordingly, the toothed clamping member 2 is welded and fixed in the receiving groove 13.

[0061] Based on the above structure, it should be noted that, in an optional implementation, the toothed clamping member 2 is welded and fixed in the receiving groove 13, and then finely welded and fixed by silver solder or copper solder, and finally the surface is polished to make it smooth. By adopting such a manufacturing method, the defects of the toothed clamping member 2 detaching, falling off, or separating from the clamping head can be effectively prevented, while improving the smoothness of the weld between the toothed clamping member 2 and the receiving groove 13 and the firmness of the first clamping plate 11 and the second clamping plate 12.

[0062] The above specific embodiments further illustrate the purpose, technical solution, and beneficial effects of this utility model. It should be understood that the above are only specific embodiments of this utility model and are not intended to limit this utility model. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

[0063] In the description of this utility model, it should be understood that the terms indicating orientation or positional relationship are based on the orientation or positional relationship shown in the drawings and are only for the convenience of describing this utility model and simplifying the description, and are not intended to indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model.

[0064] In this utility model, unless otherwise explicitly specified and limited, the terms "installation," "connection," "joining," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0065] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the product of this utility model is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model. In addition, the terms "first," "second," and "third," etc., are only used to distinguish descriptions and should not be construed as indicating or implying relative importance.

[0066] Furthermore, terms such as "horizontal," "vertical," and "sag" do not imply that components must be absolutely horizontal or suspended, but rather that they can be slightly tilted. For example, "horizontal" simply means that its direction is more horizontal relative to "vertical," and does not mean that the structure must be completely horizontal, but can be slightly tilted.

[0067] In this invention, unless otherwise expressly specified and limited, "above or below" the first feature may include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on" the first feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the first feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

Claims

1. A clamp opening and closing linkage control component, characterized in that, include: Linkage rod, and rod length adjustment assembly connected to the linkage rod; The linkage rod includes at least one segment of tortuous elastic rod; the tortuous elastic rod includes multiple continuously arranged curved rod segments; and The rod length adjustment assembly includes a double-threaded component that engages with the threaded end of the linkage rod near the hand, and a control rod that engages with the threaded end of the double-threaded component away from the linkage rod. When the double-threaded component rotates in the first direction, the relative distance between the linkage rod and the control rod shortens, thereby reducing the total length of the rod length adjustment group; When the double-threaded component rotates in a second direction opposite to the first direction, the relative distance between the linkage rod and the control rod increases, thereby increasing the total length of the rod length adjustment group.

2. The clamp opening and closing linkage control component according to claim 1, characterized in that, The linkage rod also includes a straight rod connected to the bendable elastic rod; wherein The straight rod is connected to the double-threaded component.

3. The clamp opening and closing linkage control component according to claim 2, characterized in that, The straight rod is provided with a first threaded connector at the end away from the curved elastic rod; The first threaded connector is used to connect to one end of a double-threaded component.

4. The clamp opening and closing linkage control component according to claim 2, characterized in that, The control lever has a second threaded connector at one end facing the double-threaded component; The second threaded connector is used to connect to the other end of the double-threaded component.

5. The clamp opening and closing linkage control component according to claim 4, characterized in that, The double-ended threaded component has threaded structures on both axial ends. One axial end has a threaded structure for connecting to the first threaded connector, and the other axial end has a threaded structure for connecting to the second threaded connector.

6. The clamp opening and closing linkage control component according to claim 1, characterized in that, Each of the curved segments is either W-shaped or S-shaped.

7. A needle holder for laparoscopic surgery, characterized in that, include: The device includes a needle-holding portion and a clamp opening and closing linkage control assembly as described in any one of claims 1 to 6 connected to the needle-holding portion, and a handle portion connected to the proximal end of the clamp opening and closing linkage control assembly; wherein... The needle holding part includes a first clamping plate and a second clamping plate that are hinged together and adapted to make relative opening and closing movements. The needle-holding part is connected to the end of the linkage rod away from the rod length adjustment group.

8. The needle holder for laparoscopic surgery according to claim 7, characterized in that, The first clamping plate and the second clamping plate have toothed clamping elements on their facing end faces.

9. The needle holder for laparoscopic surgery according to claim 8, characterized in that, Each of the toothed clamping members is provided with multiple protruding teeth, each protruding tooth being a cone shape formed by combining several clamping surfaces, and the tip of each protruding tooth being arc-shaped.

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