Thoracoscope sliding handle electric hook

Abstract

The present application relates to the technical field of medical devices, in particular to a thoracoscope sliding type holding handle electric hook, which comprises a fixed rod, one end of the fixed rod is provided with an electric hook assembly used for reaching the lesion area for operation in surgery, and a handle is sleeved on the outside of the fixed rod. A pressing operation part and a self-locking assembly for locking the axial position of the handle relative to the fixed rod are arranged on the handle, and the self-locking assembly comprises a friction part and an elastic part. The elastic part is used for driving the friction part to contact and rub with the outer wall of the fixed rod in normal state and locking the handle, and the pressing operation part is used for driving the friction part to overcome the elastic force of the elastic part and unlock the handle when pressed. The present application realizes stepless continuous adjustment of the holding position through the friction locking mechanism, which is convenient for the operator to flexibly match the force support point, and improves the hand stability and force accuracy of the surgical operation.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, specifically to an electric hook for a sliding grip handle of a thoracoscope. Background Technology

[0002] Thoracoscopic minimally invasive surgery, a representative procedure in thoracic surgery, is widely used in the treatment of diseases of the lung, esophagus, and mediastinum. During thoracoscopic surgery, the electrocautery hook is a commonly used instrument for blunt or sharp tissue dissection, coagulation, and cutting. Because thoracoscopic surgery requires an operating port established through a trocar within a closed thoracic cavity, the surgeon, constrained by the fulcrum effect of this port, needs to frequently adjust the insertion depth, operating angle, and cutting direction of the electrocautery hook when dealing with complex internal thoracic structures (such as pleural adhesions and lesions of varying depths). In this delicate procedure, the surgeon's hand position when holding the instrument affects the stability of the fulcrum and the precision of control over the instrument tip; an unstable grip or restricted operating posture may lead to accidental injury to surrounding healthy tissues or blood vessels, increasing the risk of surgical complications.

[0003] Taking the straight-bar thoracoscopic electrocautery hook manufactured by Johnson & Johnson, which is commonly used in clinical practice, as an example, the existing product's structure mainly consists of an insulated handle fixed to the end of a metal straight rod. The drawback of this structure is that in actual surgery, when operating on shallow areas or performing delicate dissections, the handle fixed to the end results in a relatively long working arm, making operation more strenuous and inconvenient for flexible adjustment. In such cases, the surgeon usually needs to change the grip position, using their fingers to directly pinch the metal rod in the middle of the hook. However, the fixed straight rod in the middle of the hook has a small diameter and a relatively smooth surface, which cannot provide sufficient anti-torsional force-bearing surface. The surgeon is prone to relative slippage when pinching the straight rod, and the grip stability is poor when changing the cutting direction of the hook. This reduces the sensitivity of the instrument operation to some extent, thus affecting the accuracy and safety of the surgical procedure. Therefore, there is an urgent need to design a thoracoscopic electrocautery hook with a sliding handle that can flexibly adjust the grip position and lock into place according to surgical needs. Summary of the Invention

[0004] To address the aforementioned problems, this invention provides a thoracoscopic sliding handle electric hook for flexibly adjusting the handle position during thoracoscopic minimally invasive surgery.

[0005] To achieve the above objectives, the technical solution of the present invention is as follows: a thoracoscopic sliding handle electric hook includes a fixed rod, one end of which is provided with an electric hook assembly for reaching the lesion area during surgery. A handle is slidably sleeved on the outside of the fixed rod. The handle is provided with a pressing operation component and a self-locking component for locking the axial position of the handle relative to the fixed rod. The self-locking component includes a friction part and an elastic element. The elastic element is used to normally drive the friction part to form friction with the outer wall of the fixed rod and lock the handle. The pressing operation component is used to drive the friction part to overcome the elastic force of the elastic element and release the handle lock when pressure is applied.

[0006] The technical principle of the above solution is as follows: In its natural state, the elastic element applies elastic force to the friction part, causing the friction part to press against the outer wall of the fixed rod. The frictional resistance generated between the two keeps the axial position of the handle relative to the fixed rod unchanged. When pressure is applied to the pressing operation, the pressing operation is displaced and transmits the force to the friction part, causing the friction part to overcome the elastic force of the elastic element and detach from the outer wall of the fixed rod. At this time, the frictional resistance is released, and the operator can push the handle to slide along the axis of the fixed rod to the target operating position. After the pressure applied to the pressing operation is removed, the elastic element returns to its deformation and drives the friction part to press against the outer wall of the fixed rod again, rebuilding the locked state of the handle on the fixed rod.

[0007] The above approach has the following beneficial effects:

[0008] 1. This solution, by attaching a handle to the outside of the fixed rod and utilizing the linkage between the pressing mechanism and the self-locking component, changes the traditional non-adjustable grip design of the electric hook, overcoming the technical bias of surgeons being forced to grip the metal fixed rod during deep operations, which easily leads to slippage. Operators only need to operate the pressing mechanism with one hand to achieve stepless adjustment of the handle position along the axial travel of the fixed rod, allowing the force fulcrum to match the current surgical angle, improving hand stability and force application accuracy during operation, and reducing the risk of tissue collateral damage due to unstable grip.

[0009] 2. In this solution, the self-locking component uses the cooperation of an elastic element and a friction part to construct a normally closed physical locking logic. Compared with the snap-fit ​​structure with pre-reserved fixing holes, the friction locking does not require holes to be made on the outer wall of the fixing rod, maintaining the smoothness and continuity of the outer wall of the fixing rod, avoiding the residue of blood and tissue fluid in the gaps during the operation, meeting the cleanliness and sterilization requirements of medical devices, and at the same time realizing continuous adjustment of the locking position, eliminating the adjustment blind spot caused by the spacing of the fixing holes.

[0010] Furthermore, a receiving groove extending axially along the fixed rod is provided on one end face of the fixed rod. The electric hook assembly includes an electric hook body and a connecting rod. The connecting rod is slidably fitted in the receiving groove. One end of the connecting rod is located outside the receiving groove and is fixedly connected to the electric hook body. The other end of the connecting rod is provided with an adjustment mechanism for driving the connecting rod to slide axially linearly along the receiving groove.

[0011] Beneficial effects: By incorporating a receiving groove and a connecting rod, and setting an adjustment mechanism on the connecting rod, the electric hook body is given the ability to independently extend and retract along the axis of the fixed rod. This allows the length of the electric hook body to be adjusted according to the depth of the lesion inside the thoracic cavity and the degree of tissue adhesion, solving the problem that fixed-length instruments are difficult to adapt to complex anatomical spaces, and improving the reach of the electric hook body to deep lesions.

[0012] Furthermore, the adjustment mechanism includes a rack fixedly connected to the other end of the connecting rod and a dial that meshes with the rack.

[0013] Beneficial effects: The meshing of the rack and pinion gears forms a direct mechanical transmission link, converting the rotational motion of the pinion gear into the linear motion of the connecting rod. The operator controls the extension length of the electric hook body by moving the pinion gear. Compared to direct push-pull, the rack and pinion transmission provides smooth feed damping, making the extension stroke control more precise.

[0014] Furthermore, the side wall of the fixed rod has an clearance opening that communicates with the receiving groove. A rotating shaft corresponding to the clearance opening passes through the receiving groove. The dial is rotated and sleeved on the rotating shaft. The periphery of the dial part is located outside the fixed rod through the clearance opening.

[0015] Beneficial effects: By using a rotating shaft to embed the dial wheel within the receiving groove of the fixed rod, only a portion of the periphery is exposed through an avoidance opening. This reduces the radial volume occupied by the adjustment mechanism outside the fixed rod while ensuring the operator can reach and drive the dial wheel, thus avoiding scratches or obstructions caused by external protrusions when the instrument enters or exits the puncture channel.

[0016] Furthermore, the outer wall of the connecting rod is symmetrically fixed with guide limit keys, and the inner wall of the receiving groove is symmetrically provided with guide limit grooves, with the guide limit keys slidingly engaging with the corresponding guide limit grooves.

[0017] Beneficial effects: The sliding fit between the guide limit key and the guide limit groove restricts the degree of freedom of movement of the connecting rod within the receiving groove, allowing the connecting rod to only undergo axial linear displacement, thus preventing circumferential torsion of the connecting rod and its front end electric hook body during extension, contraction, or lateral force. Simultaneously, the axial end of the guide limit groove, through physical contact with the guide limit key, limits the maximum sliding stroke of the connecting rod, preventing it from dislodging from the receiving groove.

[0018] Furthermore, a support and limiting groove is provided on the side of the rack away from its teeth, and a support and limiting seat is fixedly connected to the inner wall of the groove, with the support and limiting seat slidingly engaging with the support and limiting groove.

[0019] Beneficial effects: The support and limiting seat fits into the support and limiting groove, forming an axial sliding support on the back side of the rack. When the operator rotates the dial wheel, the support and limiting seat can withstand the radial force generated by the dial wheel teeth pressing against the rack, providing basic anti-bending support for the rack, thereby maintaining the normal meshing between the rack and the dial wheel.

[0020] Furthermore, both the support limiting groove and the support limiting seat have T-shaped cross sections.

[0021] Beneficial effects: The T-shaped cross-section mating structure achieves bidirectional interlocking between the support limiting seat and the support limiting groove in the radial direction. This structure not only further enhances the back support capability of the rack, but also restricts the vertical floating of the connecting rod tail within the receiving groove, constraining the rack's movement trajectory to a straight line of translation, avoiding the risk of tooth dislodgement during the reciprocating sliding process of the rack, and further improving the stability of the transmission.

[0022] Furthermore, a radial guide groove is provided on the outer wall of the handle, and the pressing operation component is slidably connected in the radial guide groove. A clearance hole for the fixed rod to pass through is provided on the pressing operation component, the friction part is the inner wall of the clearance hole, one end of the elastic component is fixedly connected to the bottom wall of the radial guide groove, and the other end of the elastic component is fixedly connected to the bottom of the pressing operation component.

[0023] Beneficial effects: By using the clearance hole through the pressing operation piece as the through-path for the fixing rod, the elastic element pushes the pressing operation piece radially, causing the inner wall of the clearance hole to misalign and compress with the outer wall of the fixing rod. This structure utilizes edge misalignment to achieve frictional clamping with a large contact surface, resulting in a short mechanical transmission path, fewer parts, and a reduced failure rate of the device.

[0024] Furthermore, an operating cavity is provided inside the handle, and a first sliding groove communicating with the operating cavity is provided on the outer wall of the handle. The pressing operation element is slidably connected in the first sliding groove. A second sliding groove communicating with the operating cavity is provided on the inner wall of the handle. The friction part is slidably connected in the second sliding groove. A lever mechanism for transmitting pressing force to drive the friction part to move radially is provided inside the operating cavity. One end of the lever mechanism is rotatably connected to the bottom of the pressing operation element, and the other end of the lever mechanism is rotatably connected to the top of the friction part. One end of the elastic element is fixedly connected to the top wall of the operating cavity, and the other end of the elastic element is fixedly connected to the top of the friction part.

[0025] Beneficial effects: The introduction of a lever mechanism separates the pressing operation part from the friction part, and the lever arm ratio amplifies the operating force or stroke. The friction part slides along the second sliding groove, ensuring that the pressing force of the friction part on the fixed rod always remains radially perpendicular, avoiding lateral jamming caused by the offset of the pressing force, and improving the smoothness of the self-locking and unlocking actions.

[0026] Furthermore, a limiting block is fixedly connected to the side wall of the pressing operation component, and the top surface of the limiting block abuts against the top wall of the operating cavity.

[0027] Beneficial effects: The physical contact between the limiting block and the top wall of the operating cavity limits the extreme upward position of the pressing operation component when it is reset by the reverse linkage of the lever mechanism after the force is released, preventing the pressing operation component from going too far upward and coming out of the first sliding groove, thus maintaining the connection stability of the lever transmission chain inside the operating cavity. Attached Figure Description

[0028] Figure 1 This is an isometric view of an embodiment of the thoracoscopic sliding grip electric hook of the present invention;

[0029] Figure 2 This is a front view of an embodiment of the thoracoscopic sliding grip electric hook of the present invention;

[0030] Figure 3 This is a front sectional view of an embodiment of the thoracoscopic sliding grip electric hook of the present invention;

[0031] Figure 4 for Figure 3 Enlarged view of section A;

[0032] Figure 5 for Figure 3 Enlarged view of section B;

[0033] Figure 6 for Figure 3 Enlargement of part C Figure 1 ;

[0034] Figure 7 This is a side sectional view of the pressing operation component in Embodiment 1 of the thoracoscopic sliding grip electric hook of the present invention.

[0035] Figure 8 for Figure 3 Enlargement of part C Figure 2 .

[0036] The reference numerals in the accompanying drawings include: 1. Fixed rod; 2. Connecting rod; 3. Electric hook body; 4. Handle; 5. Dial wheel; 6. Receiving groove; 7. Rack; 8. Guide limiting groove; 9. Guide limiting key; 10. Rotating shaft; 11. Clearance opening; 12. Pressing operation component; 13. Radial guide groove; 14. Elastic component; 15. Clearance hole; 16. Friction part; 17. Operating cavity; 18. Support base; 19. Lever; 20. Limiting block; 21. First sliding groove; 22. Second sliding groove. Detailed Implementation

[0037] The technical solution of the present invention will now be clearly and completely described with reference to the accompanying drawings. Obviously, the described embodiments are only some, not all, of the embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort are within the scope of protection of the present invention.

[0038] In the description of this invention, 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. They are used only for the convenience of describing the invention and for 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0039] In the description of this invention, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "linking" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; 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; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0040] The following detailed description illustrates the specific implementation method:

[0041] Example 1:

[0042] As attached Figure 1 and attached Figure 2 As shown, a thoracoscopic sliding handle electric hook includes a fixed rod 1. One end of the fixed rod 1 is provided with an electric hook assembly for reaching the lesion area during surgery. A handle 4 is slidably sleeved on the outside of the fixed rod 1. Preferably, considering that the gloves worn by the surgeon during the operation are easily contaminated with blood and tissue fluid, the handle 4 is covered with an anti-slip pad to prevent a decrease in grip stability.

[0043] The handle 4 is provided with a pressing operation member 12 and a self-locking assembly for locking the axial position of the handle 4 relative to the fixed rod 1. The self-locking assembly includes a friction part 16 and an elastic member 14. The elastic member 14 is used to drive the friction part 16 to contact and rub against the outer wall of the fixed rod 1 in normal state and lock the handle 4. The pressing operation member 12 is used to drive the friction part 16 to overcome the elastic force of the elastic member 14 and release the handle 4 from locking when it is pressed.

[0044] Specifically, as shown in the attached document Figure 6 and attached Figure 7 As shown, a radial guide groove 13 is provided on the handle 4, and the pressing operation member 12 is slidably connected in the radial guide groove 13. A clearance hole 15 for the fixed rod 1 to pass through is provided on the pressing operation member 12. The friction part 16 is the inner wall of the clearance hole 15. One end of the elastic member 14 is welded to the bottom wall of the radial guide groove 13, and the other end of the elastic member 14 is welded to the bottom of the pressing operation member 12.

[0045] As attached Figure 3 As shown, a receiving groove 6 extending axially along the fixed rod 1 is formed on one end face of the fixed rod 1. The electric hook assembly includes an electric hook body 3 and a connecting rod 2. The connecting rod 2 is slidably fitted within the receiving groove 6. One end of the connecting rod 2 is located outside the receiving groove 6 and welded to the electric hook body 3. A rack 7 is welded to the other end of the connecting rod 2, and the rack 7 meshes with a dial wheel 5. (See attached diagram) Figure 5 As shown, the side wall of the fixed rod 1 has a clearance opening 11 communicating with the receiving groove 6. A rotating shaft 10 corresponding to the clearance opening 11 passes through the receiving groove 6. The dial wheel 5 is rotatably sleeved on the rotating shaft 10. Part of the periphery of the dial wheel 5 is located outside the fixed rod 1 through the clearance opening 11. Preferably, a protective cover is fixedly connected to the edge of the clearance opening 11. The protective cover covers the dial wheel 5, meeting the clinical infection control and high-temperature and high-pressure sterilization requirements of medical devices. The protective cover is made of medical-grade silicone rubber. Medical-grade silicone rubber has excellent high-temperature resistance and flexibility, which can prevent body fluids from seeping into the receiving groove 6 while allowing the operator to apply friction driving force to the dial wheel 5 inside by squeezing the surface of the protective cover from the outside.

[0046] As attached Figure 4 As shown, the outer wall of the connecting rod 2 is symmetrically fixed with guide limit keys 9, and the inner wall of the receiving groove 6 is symmetrically provided with guide limit grooves 8. The guide limit keys 9 and the corresponding guide limit grooves 8 are slidably engaged. The rack 7 is provided with a support limit groove on the side away from its teeth. The inner wall of the receiving groove 6 is fixedly connected with a support limit seat. The support limit seat and the support limit groove are slidably engaged. The cross-sections of the support limit groove and the support limit seat are both T-shaped.

[0047] The specific implementation process is as follows:

[0048] In thoracoscopic surgery, when faced with changes in the surgical dissection angle, if the existing position of the handle 4 restricts the operator's wrist and causes improper force application posture, it is necessary to adjust the position of the handle 4 on the fixed rod 1.

[0049] In its natural state, the elastic element 14 pushes the pressing operation element 12 upward, forcing the pressing operation element 12 to shift radially outward along the radial guide groove 13. At this time, the clearance hole 15 penetrating inside the pressing operation element 12 is offset and misaligned, so that the inner wall of the clearance hole 15 (i.e., the friction part 16) presses tightly against the outer wall of the fixing rod 1. The physical misalignment and squeezing friction generated by the contact surface locks the handle 4 onto the fixing rod 1.

[0050] When a sliding grip position is required, the operator applies downward pressure towards the central axis of the fixed rod 1 to the pressing operation member 12 with one hand. Upon receiving this pressure, the pressing operation member 12 overcomes the elastic force of the bottom elastic element 14 and slides downward along the radial guide groove 13. As the pressing operation member 12 moves downward, the central axis of the clearance hole 15 approaches the central axis of the fixed rod 1, releasing the offset misalignment. The friction part 16 (i.e., the inner wall of the clearance hole 15) disengages from its pressing contact with the outer wall of the fixed rod 1. At this point, the frictional resistance between the two is eliminated, and the operator can push the handle 4 axially along the fixed rod 1 to an ergonomically suitable position. Once in position, the operator releases the finger pressure, the elastic element 14 releases its elastic potential energy, and pushes the pressing operation member 12 outward to reset. The inner wall of the clearance hole 15 then shifts upward, again forming a misaligned contact with the outer wall of the fixed rod 1, rebuilding the frictional resistance to lock the handle 4 in place.

[0051] On the other hand, when surgery requires addressing deep lesions or tissue adhesions in the thoracic cavity, and the existing length of the electric hook body 3 cannot precisely reach the target area, the operator rotates the internal dial wheel 5 by squeezing the outside of the protective cover. The dial wheel 5 rotates around the pivot 10, using its teeth to drive the meshing rack 7, converting the rotational motion into linear displacement of the connecting rod 2 along the receiving groove 6. During the sliding of the connecting rod 2, the guide limiting key 9 fixed to its outer wall slides synchronously along the guide limiting groove 8 on the inner wall of the receiving groove 6, bearing the lateral force on the front electric hook body 3 and restricting the circumferential torsion of the connecting rod 2; at the same time, the T-shaped support limiting seat slides relative to each other in the support limiting groove, bearing the radial extrusion force downward from the back side of the dial wheel 5 and restricting the up and down movement of the rack 7, ensuring that the rack 7 remains within the engagement stroke. The translation of the connecting rod 2 ultimately causes the electric hook body 3, which is fixedly connected to it, to extend outward or retract inward to match the operating length of the deep lesion.

[0052] Example 2:

[0053] As attached Figure 8As shown, the difference from Embodiment 1 is that in Embodiment 1, the displacement of the pressing operation member 12 directly compresses the elastic member 14. When a higher stiffness elastic member 14 is used to increase the locking friction, the unlocking operation resistance will increase. In addition, if the pressing direction deviates from the radial direction, it is easy for the pressing operation member 12 to become stuck on one side in the radial guide groove 13. To optimize the force transmission path and improve the smoothness of operation:

[0054] The handle 4 has an operating cavity 17 inside, and the outer wall of the handle 4 has a first sliding groove 21 that communicates with the operating cavity 17. The pressing operation member 12 is slidably connected in the first sliding groove 21. The inner wall of the handle 4 has a second sliding groove 22 that communicates with the operating cavity 17. The friction part 16 is slidably connected in the second sliding groove 22. The operating cavity 17 is provided with a lever mechanism for transmitting pressing force to drive the friction part 16 to move radially.

[0055] Preferably, the lever mechanism includes a support base 18 and a lever 19 bolted to the bottom wall of the operating cavity 17. The middle part of the lever 19 is hinged to the support base 18, one end of the lever 19 is hinged to the bottom of the pressing operation member 12, and the other end of the lever 19 is hinged to the top of the friction part 16. One end of the elastic member 14 is welded to the top wall of the operating cavity 17, and the other end of the elastic member 14 is welded to the top of the friction part 16. A limiting block 20 is welded to the side wall of the pressing operation member 12, and the top surface of the limiting block 20 abuts against the top wall of the operating cavity 17.

[0056] Preferably, the bottom of the friction part 16 is an arc-shaped surface that matches the outer wall contour of the fixing rod 1, increasing the friction gripping area to improve the anti-slipping ability during locking.

[0057] The specific implementation process is as follows:

[0058] When the surgical dissection direction is restricted and the sliding handle 4 needs to be slidable, the operator presses down on the pressing operation piece 12. The pressing operation piece 12 moves down along the first sliding groove 21, applying a pushing force to one end of the lever 19. After being subjected to force, the lever 19 rotates around the pivot axis 10, using the lever arm to transmit the force in the opposite direction, causing its other end to lift up, thereby pushing the friction part 16 located in the second sliding groove 22 to overcome the downward pushing force of the top elastic member 14 and slide upward. As the friction part 16 moves upward, its bottom arc-shaped surface disengages from the pressing state with the outer wall of the fixing rod 1, and the handle 4 returns to a slidable state.

[0059] After the operator moves the handle 4 to a new position along the axis of the fixed rod 1, they release the pressing operation member 12. At this time, the elastic member 14 at the top extends downward and pushes the friction part 16. The friction part 16 moves downward along the second sliding groove 22, and its bottom arc-shaped surface presses against the outer wall of the fixed rod 1 again to complete the locking. As the friction part 16 moves downward, the other end of the lever 19 is driven to move downward, causing the lever 19 to rotate in the opposite direction around the pivot axis 10; one end of the lever 19 then lifts upward, transmitting the force to the bottom of the pressing operation member 12, driving the pressing operation member 12 to move upward along the first sliding groove 21. The pressing operation member 12 continues to rise until the top surface of the limiting block 20 on the side wall abuts against the top wall of the operating cavity 17, restricting the further upward movement of the pressing operation member 12, thereby completing the reset of the internal transmission chain.

[0060] Obviously, the above embodiments are merely illustrative examples for clear explanation and are not intended to limit the implementation. Those skilled in the art will recognize that other variations or modifications can be made based on the above description. It is neither necessary nor possible to exhaustively list all possible implementations here. However, obvious variations or modifications derived therefrom are still within the scope of protection of this invention.

Claims

1. A sliding handle electric hook for thoracoscopic surgery, comprising a fixing rod (1), characterized in that, One end of the fixed rod (1) is provided with an electric hook assembly for reaching the lesion area during surgery. The fixed rod (1) is slidably sleeved with a handle (4). The handle (4) is provided with a pressing operation (12) and a self-locking assembly for locking the handle (4) relative to the axial position of the fixed rod (1). The self-locking assembly includes a friction part (16) and an elastic element (14). The elastic element (14) is used to drive the friction part (16) to contact and rub against the outer wall of the fixed rod (1) under normal conditions and lock the handle (4). The pressing operation (12) is used to drive the friction part (16) to overcome the elastic force of the elastic element (14) and release the handle (4) from locking when pressure is applied.

2. The thoracoscopic sliding handle electric hook according to claim 1, characterized in that, The fixed rod (1) has a receiving groove (6) extending axially along the fixed rod (1) on one end face. The electric hook assembly includes an electric hook body (3) and a connecting rod (2). The connecting rod (2) is slidably fitted in the receiving groove (6). One end of the connecting rod (2) is located outside the receiving groove (6) and is fixedly connected to the electric hook body (3). The other end of the connecting rod (2) is provided with an adjustment mechanism for driving the connecting rod (2) to slide axially linearly along the receiving groove (6).

3. The thoracoscopic sliding handle electric hook according to claim 2, characterized in that, The adjustment mechanism includes a rack (7) fixedly connected to the other end of the connecting rod (2) and a dial (5) meshing with the rack (7).

4. The thoracoscopic sliding handle electric hook according to claim 3, characterized in that, The side wall of the fixed rod (1) is provided with a clearance opening (11) that communicates with the receiving groove (6). The receiving groove (6) is provided with a rotating shaft (10) corresponding to the clearance opening (11). The dial wheel (5) is rotated and sleeved on the rotating shaft (10). The periphery of part of the dial wheel (5) is located outside the fixed rod (1) through the clearance opening (11).

5. The thoracoscopic sliding handle electric hook according to claim 4, characterized in that, The outer wall of the connecting rod (2) is symmetrically fixed with guide limit keys (9), and the inner wall of the receiving groove (6) is symmetrically provided with guide limit grooves (8). The guide limit keys (9) and the corresponding guide limit grooves (8) are slidably engaged.

6. The thoracoscopic sliding handle electric hook according to claim 5, characterized in that, A support limiting groove is provided on the side of the rack (7) away from its teeth, and a support limiting seat is fixedly connected to the inner wall of the receiving groove (6). The support limiting seat and the support limiting groove slide together.

7. The thoracoscopic sliding handle electric hook according to claim 6, characterized in that, Both the support limiting groove and the support limiting seat have T-shaped cross sections.

8. The thoracoscopic sliding handle electric hook according to claim 7, characterized in that, The outer wall of the handle (4) is provided with a radial guide groove (13). The pressing operation (12) is slidably connected in the radial guide groove (13). The pressing operation (12) is provided with a clearance hole (15) for the fixed rod (1) to pass through. The friction part (16) is the inner wall of the clearance hole (15). One end of the elastic element (14) is fixedly connected to the bottom wall of the radial guide groove (13), and the other end of the elastic element (14) is fixedly connected to the bottom of the pressing operation (12).

9. The thoracoscopic sliding handle electric hook according to claim 7, characterized in that, An operating cavity (17) is provided inside the handle (4). A first sliding groove (21) communicating with the operating cavity (17) is provided on the outer wall of the handle (4). The pressing operation member (12) is slidably connected in the first sliding groove (21). A second sliding groove (22) communicating with the operating cavity (17) is provided on the inner wall of the handle (4). The friction part (16) is slidably connected in the second sliding groove (22). A lever mechanism for transmitting pressing force to drive the friction part (16) to move radially is provided inside the operating cavity (17). One end of the lever mechanism is rotatably connected to the bottom of the pressing operation member (12), and the other end of the lever mechanism is rotatably connected to the top of the friction part (16). One end of the elastic member (14) is fixedly connected to the top wall of the operating cavity (17), and the other end of the elastic member (14) is fixedly connected to the top of the friction part (16).

10. The thoracoscopic sliding handle electric hook according to claim 9, characterized in that, The side wall of the pressing operation piece (12) is fixedly connected to a limiting block (20), and the top surface of the limiting block (20) abuts against the top wall of the operating cavity (17).

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