Laparoscopic instrument
By designing a laparoscopic instrument guard with moving and rotating grooves, ensuring that the forceps are kept closed during the insertion process, the problem of wound enlargement caused by mistaken touch of the forceps is solved, and a safer and easier surgical operation is achieved.
Patent Information
- Application Number
- CN202421773324.4
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-07-24
- Publication Date
- 2025-06-03
- Estimated Expiration
- 2034-07-24
AI Technical Summary
In laparoscopic surgery, the opening of the forceps due to accidental touch often leads to enlargement of the patient's wound, and it is difficult for the prior art to effectively avoid such situations.
A laparoscopic instrument is designed, which includes a casing, a operating rod and a clamp head. By setting a moving groove and a rotary groove in the thrust block of the guard and setting a bump on the operating rod, it is ensured that during the insertion of the pliers, the bump is located in the rotation groove and is arranged in the wrong way with the moving groove, the operating rod cannot move, and the pliers are kept closed.
It effectively avoids the situation where the forceps are opened due to accidental touch during insertion, reduces the risk of enlargement of the patient's wound and simplifies surgical operations.
Smart Images
Figure CN222929794U_ABST
Abstract
Description
Technical Field
[0001] The utility model relates to the technical field of minimally invasive surgical instruments, in particular to a laparoscopic instrument. Background Art
[0002] Laparoscopic surgery is a current conventional minimally invasive surgical method, and laparoscopic instruments are essential tools for performing operations such as pulling, clamping, and separating inside a patient's body during laparoscopic surgery. In the prior art, a laparoscopic instrument is passed through the abdominal wall of a patient and into the patient's body. After the clamp head at the end of the force rod enters the surgical site inside the patient's body, the clamp head is controlled to open and close through a handle to achieve clamping or releasing of a target.
[0003] During the surgical operation, in order to further reduce the size of the patient's wound, the force rod of the laparoscopic instrument is often made smaller to avoid scarring on the patient's abdominal wall. However, during the actual operation, when inserting the clamp head into the patient's body, the doctor also holds the handle for operation. If the doctor accidentally touches the position where the handle controls the opening and closing of the clamp head during the insertion process, the clamp head will open, which will affect the insertion of the clamp head and may also enlarge the patient's wound. Summary of the Utility Model
[0004] The utility model aims to at least solve one of the technical problems existing in the prior art. For this purpose, the utility model provides a laparoscopic instrument that can avoid the situation where the clamp head opens due to accidental touch.
[0005] The solution adopted by the utility model to solve its technical problems is as follows:
[0006] A laparoscopic instrument, comprising:
[0007] A protective cylinder, including an outer shell and a thrust block. The outer shell extends along a first direction and is hollow to form an activity cavity extending along the first direction. The thrust block is arranged at the end of the outer shell and is rotatably connected to the outer shell. A moving groove and a rotating groove are provided on the inner side wall surface of the thrust block. The rotating groove is annular. The moving groove extends along the first direction and communicates with the rotating groove;
[0008] An operating rod, extending along the first direction and slidably connected to the inner side wall surface of the activity cavity. A convex block is provided on the outer side wall surface of the operating rod. The convex block is arranged inside the thrust block. The thrust block is slidably connected to the groove wall of the rotating groove. When the operating rod rotates to align the convex block with the moving groove, the convex block is slidably connected to the groove wall of the moving groove;
[0009] A clamp head, arranged at the end of the outer shell and connected to the end of the operating rod. When the operating rod moves along the first direction relative to the outer shell, the operating rod drives the clamp head to open and close.
[0010] The utility model has at least the following beneficial effects: the pliers head is opened and closed by the operating rod moving along the first direction to clamp or release the target. During the process of inserting the pliers head into the patient's body, the pliers head is in a closed state. Since the convex block is located in the rotating groove and is staggered with the moving groove, the operating rod cannot move along the first direction under the limiting action of the thrust block, so that the pliers head remains closed and will not open to affect the action of inserting the pliers head, avoiding the pliers head opening and expanding the patient's wound; when the pliers head reaches the surgical site, by rotating the operating rod to align the convex block with the moving groove and pushing the operating rod, the operating rod moves along the first direction, and the pliers head can be opened. The operation is simple and convenient.
[0011] As a further improvement of the above technical solution, the pliers head includes a first clamping arm, a second clamping arm, a first connecting rod, a second connecting rod, a first pin and a second pin. The first clamping arm and the second clamping arm are hinged to the first pin, and the first pin is connected to the end of the housing. The two ends of the first connecting rod are respectively hinged to the first clamping arm and the second pin, and the two ends of the second connecting rod are respectively hinged to the second clamping arm and the second pin. The housing is provided with a sliding groove extending along the first direction. The second pin is slidably connected to the groove wall of the sliding groove and is perpendicular to the extending direction of the sliding groove. The operating rod is drivingly connected to the second pin.
[0012] When the second pin moves away from or approaches the thrust block along the sliding groove, the first connecting rod and the second connecting rod can be rotated around the second pin, and the first clamping arm and the second clamping arm can be rotated around the first pin, so that the pliers head is opened or closed.
[0013] As a further improvement of the above technical solution, the pliers head further includes a spring, and the two ends of the spring are respectively connected to the second pin and the housing. The setting of the spring can make the pliers head automatically close and improve the clamping ability of the pliers head, making it more convenient to use and operate.
[0014] As a further improvement of the above technical solution, the laparoscopic instrument further includes:
[0015] A handle, including a rotating shaft, a movable handle and a fixed handle. The fixed handle is connected to the thrust block. The fixed handle is hollow to form an operating cavity. The rotating shaft is connected in the operating cavity. The movable handle is rotatably connected to the rotating shaft. One end of the movable handle is for holding, and the other end is drivingly connected to the operating rod to drive the operating rod to move along the first direction.
[0016] The setting of the handle is more conducive to the operator controlling the opening or closing of the pliers head and making it easier to insert the pliers head into the patient's body for surgery.
[0017] As a further improvement of the above technical solution, the movable handle includes an insulating shell and a conductive block. The conductive block is rotatably connected to the rotating shaft. The rotating shaft and the operating rod are respectively conductive with the conductive block. The clamping head is made of a metal material. The insulating shell is connected to the conductive block and extends out of the operating cavity. The laparoscopic instrument further includes:
[0018] A conductive rod, which is electrically connected to the rotating shaft and partially extends out of the operating cavity.
[0019] When the conductive rod is electrified, it can make the operating rod electrified, and then make the clamping head electrified. The clamping head can perform operations that require electrification, such as conductive cutting and electrocoagulation hemostasis, making the laparoscopic instrument more versatile and practical.
[0020] As a further improvement of the above technical solution, the outer shell is made of a metal material. The protective cylinder further includes an insulating layer, and the insulating layer is coated on the outer surface of the outer shell. The metal material has good electrical conductivity, and moreover, the metal material has high machining accuracy and is easy to make precision parts. The diameter of the made outer shell can be smaller, so that the size of the patient's wound can be reduced.
[0021] As a further improvement of the above technical solution, the insulating layer is an alumina coating. The alumina coating has good insulating performance and low cost.
[0022] As a further improvement of the above technical solution, the thrust block includes a mounting body and a cover plate. The rotating groove and the moving groove are provided in the mounting body. The moving groove opens in the direction of the clamping head. The mounting body is provided with a mounting groove, which is annular and opens towards the cover plate. An installation block is provided at the end of the outer shell, and the installation block is rotatably connected in the installation groove. The cover plate covers the opening of the installation groove and is detachably connected to the mounting body. The cover plate abuts against the installation block. With such a setting, the detachable connection between the thrust block and the outer shell can be realized, which is beneficial to cleaning the operating rod, the outer shell and the clamping head.
[0023] As a further improvement of the above technical solution, the protective cylinder further includes an operating wing, and the operating wing is connected to the outer side wall surface of the outer shell and is located at one end far from the clamping head. The setting of the operating wing can provide a rotation fulcrum for the operator to rotate the outer shell, making it more convenient for the operator to rotate the outer shell to unlock the operating rod.
[0024] As a further improvement of the above technical solution, the diameter of the outer shell is less than or equal to 2 mm. The diameter of the outer shell is set within the range of less than or equal to 2 mm, so that the wound formed on the patient's abdominal wall is smaller, the wound is easy to recover, and it is not easy to leave scars. Description of the Drawings
[0025] To more clearly illustrate the technical solutions in the embodiments of the present utility model, the following will briefly describe the attached drawings required for the description of the embodiments. Obviously, the described attached drawings are only a part of the embodiments of the present utility model, rather than all the embodiments. Those skilled in the art can also obtain other design solutions and attached drawings based on these attached drawings without creative efforts.
[0026] Figure 1 is the front view of the laparoscopic instrument according to the embodiment of the present utility model;
[0027] Figure 2 is the overall structural schematic diagram of the laparoscopic instrument according to the embodiment of the present utility model;
[0028] Figure 3 is the internal structural schematic diagram of the laparoscopic instrument according to the embodiment of the present utility model;
[0029] Figure 4 is Figure 2 the partial enlarged schematic diagram of part A in
[0030] Figure 5 is Figure 3 the partial enlarged schematic diagram of part B in
[0031] Reference numerals: 100, protective cylinder; 110, outer shell; 111, movable cavity; 112, sliding groove; 113, limiting block; 120, thrust block; 121, mounting body; 122, cover plate; 123, rotating groove; 124, moving groove; 130, operating wing; 200, operating rod; 210, convex block; 220, convex platform structure; 221, limiting groove; 300, clamping head; 310, first clamping arm; 320, second clamping arm; 330, first connecting rod; 340, second connecting rod; 350, first pin; 360, second pin; 370, spring; 400, handle; 410, movable handle; 420, fixed handle; 421, operating cavity; 430, rotating shaft; 500, conductive rod. Detailed Embodiments
[0032] The following will describe in detail the embodiments of the present utility model. The examples of the embodiments are shown in the attached drawings, where the same or similar reference numerals represent the same or similar elements or elements with the same or similar functions from beginning to end. The embodiments described below by referring to the attached drawings are exemplary and are only used to explain the present utility model, and should not be construed as a limitation to the present utility model.
[0033] In the description of the present utility model, orientation descriptions are involved. The orientations or positional relationships indicated by up, down, front, back, left, right, etc. are based on the orientations or positional relationships shown in the drawings. This is only for the convenience of describing the present utility model and simplifying the description, rather than indicating or implying that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation. Therefore, it should not be construed as a limitation to the present utility model.
[0034] In the description of the present utility model, the meaning of several is one or more, the meaning of multiple is two or more. Understandings such as greater than, less than, exceeding, etc. do not include the original number, and understandings such as above, below, within, etc. include the original number. If there is a description of first and second, it is only for the purpose of distinguishing technical features and cannot be understood as indicating or implying relative importance or implicitly indicating the quantity of the indicated technical features or implicitly indicating the sequence relationship of the indicated technical features.
[0035] In the description of the present utility model, unless otherwise clearly defined, words such as setting, installing, connecting, etc. should be understood in a broad sense. Those skilled in the art can reasonably determine the specific meanings of the above words in the present utility model in combination with the specific content of the technical solution.
[0036] Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. Based on the embodiments of the present utility model, other embodiments obtained by those skilled in the art without creative efforts all fall within the scope of protection of the present utility model. Each technical feature in the present utility model can be combined interactively on the premise of not conflicting with each other.
[0037] Refer to Figures 1 to 5 , an embodiment of the present utility model provides a laparoscopic instrument, which can avoid the situation that the clamping head 300 opens before entering the surgical site in the patient's body, causing the patient's wound to expand, and making the process of inserting the clamping head 300 into the patient's body smoother.
[0038] In this embodiment, the laparoscopic instrument includes a clamping head 300, a protective cylinder 100, and an operating rod 200.
[0039] The protective cylinder 100 includes a housing 110 and a thrust block 120. Among them, the housing 110 extends along a first direction, and the housing 110 is hollow to form a movable cavity 111. The movable cavity 111 extends along the first direction. The thrust block 120 is arranged at the end of the housing 110, and the thrust block 120 is rotatably connected to the housing 110.
[0040] A moving groove 124 and a rotating groove 123 are arranged on the inner side wall surface of the thrust block 120. The rotating groove 123 is annular, the moving groove 124 extends along the first direction, and the moving groove 124 is communicated with the rotating groove 123.
[0041] The operating rod 200 is extended along the first direction, and the operating rod 200 is slidably connected to the inner wall of the active cavity 111. The outer wall of the operating rod 200 is provided with a protrusion 210, which is arranged in the thrust rod and can rotate around the central axis of the operating rod 200 in the rotating groove 123. When the protrusion 210 is located in the rotating groove 123, the protrusion 210 is slidably connected to the groove wall of the rotating groove 123, and the protrusion 210 can rotate in the rotating groove 123.
[0042] When the operating lever 200 rotates to a position where the protrusion 210 is aligned with the moving groove 124 , the protrusion 210 can move from the rotating groove 123 to the moving groove 124 and can move along the extending direction of the moving groove 124 .
[0043] The clamp head 300 is disposed at the end of the housing 110. Specifically, the clamp head 300 and the thrust block 120 are respectively located at two ends of the housing 110 along the first direction. The clamp head 300 is connected to the end of the operating rod 200. It can be understood that when the operating rod 200 moves relative to the housing 110 along the first direction, the operating rod 200 drives the clamp head 300 to realize an opening and closing action, so as to clamp or release the target.
[0044] It is understandable that, due to the provision of the thrust block 120, the movement of the operating rod 200 along the first direction can be locked. When the operator inserts the clamp head 300 into the patient's body, the clamp head 300 is in a closed state, the protrusion 210 is located in the rotating groove 123, and the position of the protrusion 210 is staggered with the moving groove 124, and the protrusion 210 cannot enter the moving groove 124. Under the restriction of the rotating groove 123, even if the operator accidentally touches the operating rod 200 or presses the operating rod 200, the operating rod 200 cannot move in the first direction, so that the clamp head 300 cannot be opened, and the clamp head 300 is kept in a closed state, so as to prevent the clamp head 300 from opening to affect the insertion action, and to prevent the clamp head 300 from opening to expand the patient's wound.
[0045] When the forceps head 300 reaches the surgical site, the operator rotates the operating rod 200 to align the protrusion 210 with the movable groove 124, and then controls the operating rod 200 to move along the first direction to open the forceps head 300, thereby achieving surgical operations such as pulling and clamping.
[0046] It is understandable that the housing 110 and the operating rod 200 do not rotate relative to each other, and the operator can realize the rotation of the operating rod 200 by controlling the housing 110 to rotate relative to the thrust block 120 .
[0047] Specifically, in this embodiment, a limiting block 113 is provided on the inner wall of the movable cavity 111, and a boss structure 220 is provided on the outer wall surface of the operating rod 200. The boss structure 220 is in a circular ring shape, and the diameter of the boss structure 220 is greater than the diameter of the operating rod 200.
[0048] A limiting groove 221 is provided on the outer wall surface of the boss structure 220. The limiting groove 221 extends along the first direction. The limiting block 113 is arranged in the limiting groove 221 and can move along the extending direction of the limiting groove 221.
[0049] That is, the limiting groove 221 only restricts the rotation of the limiting block 113 relative to the operating rod 200, but does not restrict the movement along the first direction relative to the operating rod 200. Therefore, it will not interfere with the movement of the operating rod 200 along the first direction.
[0050] In some embodiments, referring to Figure 4 , the clamping head 300 includes a first clamping arm 310, a second clamping arm 320, a first connecting rod 330, a second connecting rod 340, a first pin 350, and a second pin 360. Among them, under the combined action of the first clamping arm 310 and the second clamping arm 320, the target can be clamped to realize operations such as traction and clamping during the operation.
[0051] Specifically, the first clamping arm 310 and the second clamping arm 320 are respectively hinged to the first pin 350. The first pin 350 is fixedly connected to the housing 110 and is located at one end far from the thrust block 120. When the first clamping arm 310 and the second clamping arm 320 rotate around the first pin 350, the opening and closing of the clamping head 300 can be realized. One end of the first connecting rod 330 is hinged to the first clamping arm 310, and the other end is hinged to the second pin 360. One end of the second connecting rod 340 is hinged to the second clamping arm 320, and the other end is hinged to the second pin 360.
[0052] A sliding groove 112 is provided at the end of the housing 110. The sliding groove 112 extends along the first direction. The second pin 360 is arranged perpendicular to the first direction and is slidably connected to the groove wall of the sliding groove 112. The end of the operating rod 200 is drivingly connected to the second pin 360.
[0053] When the operating rod 200 pushes the second pin 360 to move along the sliding groove 112 in the direction away from the thrust block 120, the first connecting rod 330 and the second connecting rod 340 respectively drive the first clamping arm 310 and the second clamping arm 320 to rotate around the first pin 350. The ends of the first clamping arm 310 and the second clamping arm 320 far from the thrust block 120 move away from each other, thereby realizing the opening of the clamping head 300.
[0054] When the second shaft pin 360 moves towards the thrust block 120, the first connecting rod 330 and the second connecting rod 340 respectively drive the first clamping arm 310 and the second clamping arm 320 to rotate around the first shaft pin 350. The ends of the first clamping arm 310 and the second clamping arm 320 that are away from the thrust block 120 approach each other, thereby realizing the closing of the jaw 300.
[0055] In some embodiments, the jaw 300 further includes a spring 370. One end of the spring 370 is connected to the second shaft pin 360, and the other end is connected to the housing 110. When the operating rod 200 pushes the second shaft pin 360 to move away from the thrust block 120, the spring 370 is in a stretched state. When the operating rod 200 is released, the spring 370 recovers under the action of the elastic force and drives the second shaft pin 360 to move towards the thrust block 120, realizing the automatic closing of the jaw 300 and also improving the clamping ability of the jaw 300.
[0056] In some embodiments, the spring 370 is sleeved on the outer periphery of the operating rod 200. Through the guiding action of the operating rod 200, the telescopic direction of the spring 370 is restricted, which can avoid the situation of the spring 370 being bent and improve the service life of the spring 370.
[0057] In some embodiments, for the convenience of operation, the laparoscopic instrument further includes a handle 400. The handle 400 includes a rotating shaft 430, a movable handle 410, and a fixed handle 420. The fixed handle 420 is connected to the thrust block 120. The fixed handle 420 is hollow to form an operation cavity 421. The rotating shaft 430 is arranged in the operation cavity 421 and is connected to the inner wall of the operation cavity 421. The movable handle 410 is rotatably connected to the rotating shaft 430. It can be understood that one end of the movable handle 410 is used for gripping, and the other end is used to drive the operating rod 200 to move in the first direction, and the end for driving the operating rod 200 is in contact with the operating rod 200.
[0058] When pressing the end of the movable handle 410 for gripping, the movable handle 410 rotates around the rotating shaft 430. The end of the movable handle 410 in contact with the operating rod 200 pushes the operating rod 200 to move in the first direction and makes the second shaft pin 360 move away from the thrust block 120, and the first clamping arm 310 and the second clamping arm 320 are in an open state.
[0059] When releasing the end of the movable handle 410 for gripping, under the elastic force of the spring 370, the second shaft pin 360 moves towards the thrust block 120, and makes the operating rod 200 move in the reverse direction. The operating rod 200 pushes the movable plate to rotate around the rotating shaft 430, and the movable handle 410 returns to the position before pressing.
[0060] It can be understood that when the movable handle 410 is in the position before being pressed, the convex block 210 enters the rotation groove 123, and the operator can rotate the housing 110 to rotate the housing 110 and the operating rod 200 relative to the thrust block 120. When the convex block 210 of the operating rod 200 rotates to a position offset from the moving groove 124, the convex block 210 is restricted by the rotation groove 123 and cannot move towards the direction of the jaw 300. At this time, the movable handle 410 cannot be pressed, thereby avoiding the situation where the operator accidentally touches the movable handle 410 or presses the movable handle 410, resulting in the opening of the jaw 300.
[0061] In some embodiments, the movable handle 410 includes an insulating shell and a conductive block. The conductive block is rotatably connected to the rotating shaft 430. The rotating shaft 430 and the operating rod 200 are respectively conductive with the conductive block. The insulating shell is connected to the conductive block and extends out into the operating cavity 421. It can be understood that the insulating shell extending out of the operating cavity 421 is the end of the movable handle 410 for gripping, one end of the conductive block is the end abutting against the operating rod 200, and the jaw 300 is made of a conductive material such as metal.
[0062] The laparoscopic instrument further includes a conductive rod 500. The conductive rod 500 is electrically connected to the rotating shaft 430 and is partially disposed extending out of the operating cavity 421. It can be understood that the conductive rod 500 is used to externally connect an energizing device. After the conductive rod 500 is powered on, the operating rod 200 can be energized, so that the jaw 300 can be energized. The jaw 300 can perform electrically conductive cutting, electrocoagulation hemostasis and other operations that require power, making the laparoscopic instrument more versatile and practical.
[0063] In this embodiment, the conductive rod 500 is disposed obliquely upward and forms an obtuse angle with the operating rod 200. Such a setting can avoid the components such as the conductive rod 500 and the plug connector connected thereto from affecting the operation of inserting the operating rod 200 into the patient's body.
[0064] In some embodiments, the housing 110 is made of an insulating material such as plastic or ceramic. In this embodiment, the housing 110 is made of a metal material. The housing 110 made of the metal material has good electrical conductivity. The sheath 100 of this embodiment further includes an insulating layer, and the insulating layer is coated on the outer surface of the housing 110, which can keep the outer surface of the housing 110 insulated.
[0065] It can be understood that compared with plastic materials and ceramic materials, the processing accuracy of metal materials is higher. Metal materials are easier to make precision parts, and the diameter of the made housing 110 can be smaller, so as to reduce the size of the patient's wound.
[0066] In this embodiment, the insulating layer is an alumina coating, which has good insulating properties and low cost.
[0067] In some embodiments, the thrust block 120 includes a mounting body 121 and a cover plate 122. The mounting body 121 is provided with a mounting groove, which is annular and opens in the direction of the cover plate 122. The rotation groove 123 and the movement groove 124 are both provided at the mounting body 121. Among them, the movement groove 124 opens in the direction of the jaw 300.
[0068] A mounting block is provided at the end of the housing 110. The mounting block is installed in the mounting groove and can rotate in the mounting groove. The cover plate 122 covers the opening of the mounting groove and is detachably connected to the mounting body 121. The cover plate 122 abuts against the mounting block, which can prevent the mounting block from disengaging from the mounting groove.
[0069] With such a setting, the detachable connection between the thrust block 120 and the housing 110 can be realized. After the cover plate 122 is detached from the mounting body 121, the mounting block can be disengaged from the mounting groove. The operating rod 200 is rotated to a position where the convex block 210 is aligned with the movement groove 124. The convex block 210 can move along the movement groove 124 and disengage from the mounting body 121, so that the entire housing 110 and the operating rod 200 can be detached from the thrust block 120, which is beneficial to cleaning the operating rod 200, the housing 110, and the jaw 300.
[0070] In some embodiments, the sheath 100 further includes an operating wing 130. The operating wing 130 is connected to the side wall surface of the housing 110 and is provided at one end of the housing 110 away from the jaw 300. It can be understood that the operating wing 130 can provide a rotation fulcrum for the operator to rotate the housing 110, that is, provide an operating position, which is more convenient for the operator to rotate the housing 110 to unlock the operating rod 200.
[0071] It can be understood that the operating wing 130 is provided at one end away from the jaw 300, which can prevent the operating wing 130 from affecting the action of inserting the jaw 300 into the patient's body and avoid expanding the patient's wound.
[0072] In some embodiments, alignment marks are provided on the thrust block 120 and the housing 110. When the alignment marks on the thrust block 120 and the housing 110 are aligned, it means that the convex block 210 of the operating rod 200 is aligned with the movement groove 124 in the thrust block 120, providing a visual cue for the operator and being more beneficial for the operator to perform the operation.
[0073] In this embodiment, the diameter of the housing 110 is less than or equal to 2 mm. Within this diameter range, the wound formed by the laparoscopic instrument on the patient's abdominal wall is smaller, the wound is easy to recover, and it is not easy to leave scars. In this embodiment, the diameter of the housing 110 is 1.9 mm.
[0074] The above has specifically described the preferred embodiments of the present utility model, but the present invention is not limited to the described embodiments. Those skilled in the art can also make various equivalent variations or substitutions without departing from the spirit of the present utility model, and these equivalent variations or substitutions are all included within the scope defined by the claims of this application.
Claims
1. A laparoscopic instrument, characterized in that: include: The casing comprises a shell and a thrust block, wherein the shell extends in a first direction and is hollow to form a movable cavity extending in the first direction, the thrust block is arranged at an end of the shell and is rotatably connected to the shell, and a moving groove and a rotating groove are arranged on an inner wall surface of the thrust block, the rotating groove is annular, the moving groove extends in the first direction and is connected to the rotating groove; An operating rod extends along a first direction and is slidably connected to the inner wall of the movable cavity. A protrusion is provided on the outer wall of the operating rod. The protrusion is arranged in the thrust block. The thrust block is slidably connected to the groove wall of the rotating groove. When the operating rod is rotated until the protrusion is aligned with the movable groove, the protrusion is slidably connected to the groove wall of the movable groove. The clamp head is arranged at the end of the shell and connected to the end of the operating rod. When the operating rod moves along a first direction relative to the shell, the operating rod drives the clamp head to open and close.
2. The laparoscopic instrument according to claim 1, characterized in that: The pliers head includes a first clamp arm, a second clamp arm, a first connecting rod, a second connecting rod, a first axle pin and a second axle pin. The first clamp arm and the second clamp arm are hinged to the first axle pin. The first axle pin is connected to the end of the shell. The two ends of the first connecting rod are respectively hinged to the first clamp arm and the second axle pin. The two ends of the second connecting rod are respectively hinged to the second clamp arm and the second axle pin. The shell is provided with a sliding groove, which extends along a first direction. The second axle pin is slidably connected to the groove wall of the sliding groove and is perpendicular to the extension direction of the sliding groove. The operating rod is drivingly connected to the second axle pin.
3. The laparoscopic instrument according to claim 2, characterized in that: The pliers head also includes a spring, and two ends of the spring are respectively connected to the second shaft pin and the housing.
4. The laparoscopic instrument according to claim 3, characterized in that: The laparoscopic instrument also includes: The handle comprises a rotating shaft, a movable handle and a fixed handle, wherein the fixed handle is connected to the thrust block, the fixed handle is hollow to form an operating cavity, the rotating shaft is connected to the operating cavity, the movable handle is rotatably connected to the rotating shaft, one end of the movable handle is used for holding, and the other end is drivingly connected to the operating rod to drive the operating rod to move in a first direction.
5. The laparoscopic instrument according to claim 4, characterized in that: The movable handle includes an insulating shell and a conductive block, the conductive block is rotatably connected to the rotating shaft, the rotating shaft and the operating rod are respectively electrically conductive to the conductive block, the pliers head is made of metal material, the insulating shell is connected to the conductive block and extends out of the operating cavity, and the laparoscopic instrument also includes: A conductive rod is conductively connected to the rotating shaft and partially extends out of the operating cavity.
6. The laparoscopic instrument according to claim 5, characterized in that: The shell is made of metal material, and the casing also includes an insulating layer, which is coated on the outer surface of the shell.
7. The laparoscopic instrument according to claim 6, characterized in that: The insulating layer is an aluminum oxide coating.
8. The laparoscopic instrument according to claim 1, characterized in that: The thrust block includes a mounting body and a cover plate, the rotating groove and the movable groove are arranged on the mounting body, the movable groove is open in the direction of the pliers head, the mounting body is provided with a mounting groove, the mounting groove is annular and is opened toward the cover plate, a mounting block is provided at the end of the shell, the mounting block is rotatably connected in the mounting groove, the cover plate covers the opening of the mounting groove, and is detachably connected to the mounting body, and the cover plate abuts against the mounting block.
9. The laparoscopic instrument according to claim 1, characterized in that: The protective sleeve also includes an operating wing, which is connected to the outer wall of the shell and is located at an end away from the pliers head.
10. The laparoscopic instrument according to claim 1, characterized in that: The diameter of the shell is less than or equal to 2 mm.