Endoscopic surgical instrument

Abstract

The application provides a kind of endoscopic surgical instrument, it relates to medical instrument technical field.It includes connecting part, operating part, transmission part and two clamps;Connecting part one end is equipped with first positioning assembly structure, operating part is equipped with the second positioning assembly structure of first positioning assembly structure plug-in cooperation, wherein, first positioning assembly structure or second positioning assembly structure is equipped with locking ring;Locking ring is in first position, locking ring limits the relative movement of first positioning assembly structure and second positioning assembly structure, in second position, locking ring removes the relative movement of first positioning assembly structure and second positioning assembly structure.When assembling, first positioning assembly structure and second positioning assembly structure are docked, then operating locking ring can realize the connection of connecting part and operating part and fixed;When needing to replace connecting part, locking ring can be directly operated, and the connection of connecting part and operating part is released;Simple operation improves the assembly and replacement efficiency of connecting part.

Description

TECHNICAL FIELD

[0001] The present application relates to the technical field of medical devices, in particular to a laparoscopic surgical instrument. BACKGROUND

[0002] The laparoscopic surgical instrument is a passive instrument that needs to be manually operated and can simulate the wrist movement of a surgical operator for intuitive operation. The instrument mainly comprises a connecting portion, two independently moving clamps, an operation control portion, and a wire pulley transmission portion located in the connecting portion and the operation control portion. The two clamps are installed at one end of the connecting portion, the control portion is connected to the other end of the connecting portion, and the movement of the two clamps is controlled through the wire pulley transmission portion.

[0003] The connection between the connecting portion and the operation control portion of the existing laparoscopic surgical instrument is generally fixed, which makes it inconvenient to disassemble and replace the connecting portion. SUMMARY

[0004] To solve the above technical problems, the present application provides a laparoscopic surgical instrument to solve the problem of inconvenient disassembly and replacement of the connecting portion.

[0005] To solve the above technical problems, the present application provides a laparoscopic surgical instrument, which comprises a connecting portion, an operation portion, a transmission portion, and two clamps. One end of the connecting portion is connected to the operation portion, and the other end is provided with two clamps. The transmission portion is located in the operation portion and the connecting portion and is connected to the two clamps. The operation portion drives the movement of the two clamps through the transmission portion. One end of the connecting portion is provided with a first positioning assembly structure, and the operation portion is provided with a second positioning assembly structure that is inserted and matched with the first positioning assembly structure. A locking ring is sleeved on the first positioning assembly structure or the second positioning assembly structure. The locking ring is configured to be movable to a first position and a second position. In the first position, the locking ring is connected to the first positioning assembly structure and the second positioning assembly structure, respectively, and limits the relative movement of the first positioning assembly structure and the second positioning assembly structure. In the second position, the locking ring releases the relative movement of the first positioning assembly structure and the second positioning assembly structure.

[0006] In some embodiments, the first positioning assembly structure comprises a first connecting pipe, and the second positioning assembly structure comprises a second connecting pipe. A positioning protrusion is arranged on the outer wall of the first connecting pipe, and a positioning groove is arranged on the outer wall of the second connecting pipe, and the shape and size of the positioning groove are matched with those of the positioning protrusion.

[0007] In some embodiments, a plurality of strip-shaped grooves are arranged on the outer wall of the first connecting pipe in a circumferential direction, and the positioning protrusion is formed between two adjacent strip-shaped grooves.

[0008] In some embodiments, the end of the positioning protrusion away from the clamp is provided with a first guide surface, and the distance between the first guide surface and the inner cavity of the connecting portion gradually decreases in the direction away from the clamp.

[0009] In some embodiments, the inner wall of the locking ring is provided with a first internal thread, and the connecting portion and the operating portion are provided with a second internal thread threadedly connected with the first internal thread.

[0010] In some embodiments, the locking ring is slidingly installed on the first positioning assembly structure and the second positioning assembly structure, at least one of the opposite ends of the locking ring is provided with a first elastic buckle, and the first positioning assembly structure and / or the second positioning assembly structure is provided with a first clamping groove matched with the first elastic buckle.

[0011] In some embodiments, the first elastic buckle comprises a first elastic member and a first clamping member connected with each other, the first elastic member is configured to be compressed when the locking ring is rotated, and the first clamping member is clamped in the first clamping groove, the wall surface of the two side walls of the first clamping member is provided with a second guide surface, and the distance between two adjacent second guide surfaces gradually decreases in the direction close to the bottom wall of the first clamping groove.

[0012] In some embodiments, the operating portion comprises an end cover, a shell and an adapter arm connected in sequence from top to bottom, the first operating member and the second operating member are rotatably installed on the end cover, and the first operating member and the second operating member are provided with operating holes; the adapter arm is rotatable on the shell around the shell axis, and the second positioning assembly structure is arranged on the adapter arm.

[0013] In some embodiments, the adapter arm comprises a first arm body and a second arm body, and the first arm body and the second arm body are relatively rotatable in the direction perpendicular to the shell axis.

[0014] In some embodiments, the outer wall of the shell comprises a first straight section, a first curved section, a second straight section, a second curved section and a third straight section in sequence from top to bottom, and the bending directions of the first curved section and the second curved section are opposite.

[0015] In some embodiments, the connecting part comprises a first part and a second part which can be connected into a tubular structure, an arc-shaped connecting piece is arranged between the first part and the second part, the first part is provided with a first opening matched with the arc-shaped connecting piece, the second part is provided with a second opening matched with the arc-shaped connecting piece, the arc-shaped connecting piece is arranged in the first opening and the second opening and is hingedly connected with the first part and the second part respectively; a second clamping groove is formed in the side wall of the side of the first part facing the second part, a slide is arranged in the side wall of the side of the second part facing the second clamping groove, a second clamping piece and a second elastic piece are mounted on the slide, the second elastic piece is hiddenly mounted on the slide, and the second clamping piece is provided with a friction surface exposed to the slide; one end of the second elastic piece is fixedly connected with the slide, and the other end is connected with the second clamping piece, and the second clamping piece is configured to be detachably connected with the second clamping groove.

[0016] In some embodiments, the shell comprises a rotating ring, a base, a first arc-shaped shell, a second arc-shaped shell and a third arc-shaped shell mounted on the base, and a transmission assembly; the rotating ring is located at the top of the shell, the outer wall of the end cover is provided with a sliding piece which can slide around the circumference thereof, the sliding piece is connected with the rotating ring and is used to drive the rotating ring to rotate; the first arc-shaped shell, the second arc-shaped shell and the third arc-shaped shell form a cylindrical structure, the central angle corresponding to the first arc-shaped shell is greater than or equal to 180°, and the central angles corresponding to the second arc-shaped shell and the third arc-shaped shell are both less than or equal to 90°; the first arc-shaped shell is fixedly mounted on the base, the base is provided with two arc-shaped tracks on the two sides of the first arc-shaped shell, and the second arc-shaped shell and the third arc-shaped shell are movably mounted on the two arc-shaped tracks respectively; the two side walls of the first arc-shaped shell are hollowed to form a first accommodating space and a second accommodating space respectively; the top of the side wall of the first arc-shaped shell is provided with a mounting groove, the transmission assembly is mounted in the mounting groove and is in transmission connection with the rotating ring, the second arc-shaped shell and the third arc-shaped shell respectively, and the transmission assembly is configured to rotate the rotating ring in a first circumferential direction, drive the first arc-shaped shell to move to the first accommodating space, and drive the second arc-shaped shell to move to the second accommodating space, rotate the rotating ring in a second circumferential direction opposite to the first circumferential direction, drive the first arc-shaped shell to move away from the first accommodating space, drive the second arc-shaped shell to move away from the second accommodating space, and make the side of the second arc-shaped shell facing the third arc-shaped shell and the side of the third arc-shaped shell facing the second arc-shaped shell close to each other.

[0017] In some embodiments, the transmission assembly comprises a first rotating shaft, a second rotating shaft, a third rotating shaft, a first bevel gear, a second bevel gear, a third bevel gear, a first elastic sheet and a second elastic sheet; opposite ends of the first rotating shaft are rotatably connected to the side walls of the mounting groove, the second rotating shaft and the third rotating shaft are rotatably mounted to the bottom wall of the mounting groove, the axial direction of the first rotating shaft is perpendicular to the axial directions of the second rotating shaft and the third rotating shaft, the first bevel gear is coaxially connected to the first rotating shaft, the second bevel gear is coaxially connected to the second rotating shaft, the third bevel gear is coaxially connected to the third rotating shaft, and opposite sides of the first bevel gear are engaged with the second bevel gear and the third bevel gear, respectively; the bottom surface of the rotating ring is provided with a row of helical teeth along the circumferential direction thereof and engaged with the first bevel gear; one end of the first elastic sheet is connected to the second rotating shaft, and the other end is connected to one side of the second arc-shaped shell; one end of the second elastic sheet is connected to the third rotating shaft, and the other end is connected to one side of the third arc-shaped shell.

[0018] In some embodiments, the top surface of the second arc-shaped shell is provided with a third clamping groove, the top surface of the fourth arc-shaped shell is provided with a fourth clamping groove, the rotating ring is provided with a second elastic buckle and a third elastic buckle, and in the mutually closed state of the side of the second arc-shaped shell facing the third arc-shaped shell and the side of the third arc-shaped shell facing the second arc-shaped shell, the second elastic buckle is connected with the third clamping groove, the third elastic buckle is connected with the fourth clamping groove, and the second elastic buckle and the third elastic buckle are configured to rotate the rotating ring in a first circumferential direction, so that the second elastic buckle is disengaged from the third clamping groove and the third elastic buckle is disengaged from the fourth clamping groove.

[0019] In some embodiments, the width of the first accommodating space in the radial direction is greater than the thickness of the second arc-shaped shell, the width of the second accommodating space in the radial direction is greater than the thickness of the third arc-shaped shell, the first arc-shaped shell comprises a first side wall and a second side wall located on both sides of the first accommodating space, the inner wall surface of one side of the first side wall is provided with an inclined first guide surface, and the inner wall surface of the other side is provided with an inclined second guide surface; the outer wall surface of the second arc-shaped shell is provided with a third guide surface matched with the first guide surface, and the outer wall surface of the third arc-shaped shell is provided with a fourth guide surface matched with the second guide surface; a first rotating connecting rod is arranged between the first side wall and the second arc-shaped shell, one end of the first rotating connecting rod is hingedly connected with a first moving piece, and the other end is rotatably mounted to the second arc-shaped shell; and / or, a second rotating connecting rod is arranged between the first side wall and the third arc-shaped shell, one end of the second rotating connecting rod is hingedly connected with a second moving piece, and the other end is rotatably mounted to the third arc-shaped shell.

[0020] According to the endoscopic surgery instrument provided in the application, the connecting structure of the connecting part and the operating part is improved, the first positioning assembly structure and the second positioning assembly structure are butted in assembly, and then the locking ring is operated to realize the connecting and fixing of the connecting part and the operating part; when the connecting part needs to be replaced, the locking ring can be directly operated to release the connection between the connecting part and the operating part; the operation is simple, and the assembly and replacement efficiency of the connecting part is improved. BRIEF DESCRIPTION OF DRAWINGS

[0021] The features, advantages, and technical effects of the exemplary embodiments of the application will be described below with reference to the accompanying drawings.

[0022] Figure 1 A structural schematic diagram of the endoscopic surgery instrument provided in the embodiment one of the application;

[0023] Figure 2 A cooperation schematic diagram of the first positioning assembly structure and the second positioning assembly structure of the endoscopic surgery instrument provided in the embodiment one of the application;

[0024] Figure 3 A structural schematic diagram of the endoscopic surgery instrument provided in the embodiment two of the application;

[0025] Figure 4 A structural schematic diagram of the connecting part of the endoscopic surgery instrument provided in the embodiment two of the application in an open state;

[0026] Figure 5 An exploded view of the shell of the endoscopic surgery instrument provided in the embodiment two of the application;

[0027] Figure 6 A structural schematic diagram of the shell of the endoscopic surgery instrument provided in the embodiment two of the application in a closed state;

[0028] Figure 7 A structural schematic diagram of the shell of the endoscopic surgery instrument provided in the embodiment two of the application in an open state;

[0029] Figure 8 A movement trajectory diagram of the second arc-shaped shell and the third arc-shaped shell of the endoscopic surgery instrument provided in the embodiment two of the application.

[0030] REFERENCE SIGNS:

[0031] 1-connecting part; 11-first part; 111-first opening; 112-second clamping groove; 12-second part; 121-second opening; 122-second clamping piece; 13-arc-shaped connecting piece;

[0032] 2 - operation part; 21 - end cover; 211 - first operation piece; 212 - second operation piece; 213 - sliding piece; 22 - shell; 221 - rotating ring; 2211 - bevel gear; 2212 - second elastic buckle; 2213 - third elastic buckle; 222 - base; 223 - first arc shell; 2231 - first containing space; 2232 - second containing space; 2233 - installation groove; 2234 - first guide surface; 2235 - second guide surface; 224 - second arc shell; 2241 - third clamping groove; 2242 - third guide surface; 225 - third arc shell; 2251 - fourth clamping groove; 2252 - fourth guide surface; 226 - transmission assembly; 2261 - first rotating shaft; 2262 - second rotating shaft; 2263 - third rotating shaft; 2264 - first bevel gear; 2265 - second bevel gear; 2266 - third bevel gear; 2267 - first elastic sheet; 2268 - second elastic sheet; 2201 - first straight section; 2202 - first curved section; 2203 - second straight section; 2204 - second curved section; 2205 - third straight section; 23 - adapter arm; 231 - first arm body; 232 - second arm body; 24 - first rotating connecting rod; 25 - second rotating connecting rod;

[0033] 3 - clamp;

[0034] 4 - first positioning assembly structure; 41 - first connecting pipe; 411 - positioning convex strip; 42 - first clamping groove;

[0035] 5 - second positioning assembly structure; 51 - second connecting pipe; 511 - positioning recess;

[0036] 6 - locking ring; 61 - first elastic buckle; 611 - first clamping piece; 612 - buckle switch. DETAILED DESCRIPTION

[0037] In order to enable the above-mentioned objects, features and advantages of the present disclosure to be more clearly understood, the following will further describe the solutions of the present disclosure. It should be noted that the embodiments of the present disclosure and the features in the embodiments can be combined with each other without conflict.

[0038] In the following description, many specific details are set forth in order to provide a thorough understanding of the present disclosure, but the present disclosure can also be implemented in other ways different from those described herein; obviously, the embodiments in the description are only some of the embodiments of the present disclosure, not all the embodiments.

[0039] Embodiment one

[0040] Figure 1 The structural schematic diagram of the endoscopic surgical instrument provided for the first embodiment of the present application is shown in the accompanying drawings. Figure 1As shown, the embodiment provides a kind of endoscopic surgical instrument, including connecting portion 1, operating portion 2, transmission part (not shown in the figure) and two functional components such as clamp 3, wherein the connecting portion 1 of the embodiment is generally configured as tubular structure, one end of connecting portion 1 is connected with operating portion 2, and the other end is equipped with two clamps 3, two clamps 3 can be relatively rotated, transmission part is located in operating portion 2 and connecting portion 1, and is connected with two clamps 3, the operating portion 2 of the embodiment is used for hand, and operating portion 2 drives two clamps 3 to act through transmission part, specifically, the pitching rotation of two clamps 3, left and right swing and the rotation between them can be realized.

[0041] Regarding the transmission part of the embodiment, it is generally a component composed of wire and pulley, for example, CN104093370B, CN106943165B and the like, therefore, the structure form and action principle of the transmission part are not described by drawing and text in the embodiment, and those skilled in the art can refer to the above existing structure.

[0042] Specifically, in combination with the drawings Figure 1 It can be known that the operating portion 2 of the embodiment includes end cover 21, shell 22 and adapter arm 23 connected in sequence from top to bottom;Wherein, the first operating member 211 and the second operating member 212 are rotatably installed on the end cover 21 of the embodiment, the first operating member 211 and the second operating member 212 are both provided with operating hole for medical staff's fingers to pass through, and the first operating member 211 and the second operating member 212 are both connected with the above-mentioned transmission part, and the second positioning assembly structure 5 of the embodiment is arranged in adapter arm 23.

[0043] In order to increase the action dimension of connecting portion 1 and two clamps 3, the adapter arm 23 of the embodiment is designed to be rotatable on the shell 22 about the axis of shell 22, so that the connecting portion 1 can be rotated about the operating portion 2 in horizontal direction, and the adapter arm 23 of the embodiment is designed to include first arm body 231 and second arm body 232, the first arm body 231 and the second arm body 232 can be relatively rotated in the direction perpendicular to the axis of shell 22, so that the up-down rotation of connecting portion 1 relative to operating portion 2 can be realized, which is convenient for abdominal or thoracic surgery.

[0044] In addition, in order to facilitate the operation of medical staff, the outer wall of shell 22 includes first straight section 2201, first curved section 2202, second straight section 2203, second curved section 2204 and third straight section 2205 in sequence from top to bottom, the bending directions of first curved section 2202 and second curved section 2204 are opposite, so that the shape of shell 22 is designed to fit the curve when holding by hand, which conforms to ergonomics, and ensures the stability of handheld endoscopic surgical instrument in the operation process.

[0045] For the above structure of the endoscope surgery instrument, the applicant finds that the connection between the existing connecting part 1 and the operation control part is generally fixed connection, and the connecting part 1 needs to be designed as a quick disassembly structure, therefore, some existing technologies design the connection between the connecting part 1 and the operation control part as threaded connection, which needs to screw the connecting part 1 when docking, which is easy to affect part of the transmission part in the connecting part 1, and since the size of the connecting part 1 is long and thin, it is also not convenient for the operator to operate. In view of this, the structure of the endoscope surgery instrument is improved as follows.

[0046] Figure 2 The first positioning assembly structure 4 and the second positioning assembly structure 5 of the endoscope surgery instrument provided by the embodiment are shown in the cooperation schematic view; combined with the drawings, the embodiment is provided with the first positioning assembly structure 4 at one end of the connecting part 1, and correspondingly, the embodiment is provided with the second positioning assembly structure 5 which is inserted and cooperated with the first positioning assembly structure 4 on the operation part 2, that is, the first positioning assembly structure 4 and the second positioning assembly structure 5 can be positioned and connected when assembling. Figure 2

[0047] Further, in order to realize the locking of the first positioning assembly structure 4 and the second positioning assembly structure 5, the locking ring 6 is further sleeved on the first positioning assembly structure 4 or the second positioning assembly structure 5, and the locking ring 6 of the embodiment is designed to be movable to the first position and the second position. When being in the first position, the locking ring 6 connects the first positioning assembly structure 4 and the second positioning assembly structure 5 respectively and limits the relative movement of the first positioning assembly structure 4 and the second positioning assembly structure 5, and when being in the second position, the locking ring 6 releases the relative movement of the first positioning assembly structure 4 and the second positioning assembly structure 5, so that the first positioning assembly structure 4 and the second positioning assembly structure 5 can be disconnected.

[0048] Specifically, the first positioning assembly structure 4 of the embodiment includes a first connecting pipe 41, and a positioning convex strip 411 is arranged on the outer wall of the first connecting pipe 41. The positioning convex strip 411 can be formed by arranging a plurality of strip-shaped grooves on the outer wall of the first connecting pipe 41 in a circumferential direction, and a positioning convex strip 411 of the embodiment is formed between adjacent two strip-shaped grooves. The positioning convex strip 411 of the embodiment can be designed to be uniformly and spacedly arranged along the circumferential direction of the outer wall of the first connecting pipe 41.

[0049] Correspondingly, in order to adapt to the above-mentioned positioning convex strip 411, the second positioning assembly structure 5 of the embodiment is designed to include a second connecting pipe 51, and a positioning recess 511 is arranged on the outer wall of the second connecting pipe 51. The shape and size of the positioning recess 511 are adapted to those of the positioning convex strip 411. In this way, the positioning convex strip 411 and the positioning recess 511 can be inserted and cooperated to complete the preliminary positioning connection of the connecting part 1 and the operation part 2. ​

[0050] In order to facilitate the positioning of the convex strip 411 and the positioning groove 511, the end of the positioning convex strip 411 away from the clamp 3 is provided with a first inclined guide surface 2234 in the embodiment, and the distance between the first guide surface 2234 and the inner wall of the inner cavity of the connecting part 1 gradually decreases in the direction away from the clamp 3. In this way, the positioning convex strip 411 can be easily inserted into the positioning groove 511.

[0051] The locking ring 6 has various structural forms, for example, the locking ring 6 is similar to a nut structure (not shown in the figure), and the inner wall of the locking ring 6 is provided with a first internal thread. Correspondingly, the first connecting pipe 41 and the second connecting pipe 51 are provided with a second internal thread for thread connection with the first internal thread.

[0052] Taking the first positioning assembly structure 4 as an example, the locking ring 6 is threadedly connected to the first connecting pipe 41 before the connecting part 1 and the operating part 2 are butted. After the first positioning assembly structure 4 and the second positioning assembly structure 5 are butted, the locking ring 6 of the embodiment can be screwed to connect the locking ring 6 with the second external thread of the first connecting pipe 41 and the second external thread of the second connecting pipe 51, thereby completing the locking and fixing of the first positioning assembly structure 4 and the second positioning assembly structure 5. When the connecting part 1 needs to be replaced, the thread connection between the locking ring 6 and the second connecting pipe 51 is released, and the connection between the first positioning assembly structure 4 and the second positioning assembly structure 5 is removed. The structure is simple and easy to operate.

[0053] Of course, the structure of the locking ring 6 of the embodiment is not limited to this, and the locking ring 6 can also be slidably installed on the first positioning assembly structure 4 and the second positioning assembly structure 5, as shown in Figure 2 At least one of the opposite ends of the locking ring 6 is provided with a first elastic buckle 61, and the first positioning assembly structure 4 and the second positioning assembly structure 5 are provided with a first clamping groove 42 matched with the first elastic buckle 61.

[0054] The first elastic buckle of the embodiment includes a first elastic member (not shown in the figure), a first clamping member 611, and a buckle switch 612. The buckle switch 612 is connected with the first clamping member 611 and is used to drive the first clamping member 611 to move. The first elastic member can be a spring or the like. The first clamping member 611 can be clamped in the first clamping groove 42. The wall surface of the two side walls of the first clamping member 611 is provided with a second guide surface 2235, and the distance between the two adjacent second guide surfaces 2235 gradually decreases in the direction close to the bottom wall of the first clamping groove 42, so as to facilitate the first clamping member 611 to enter the first clamping groove 42.

[0055] When it is needed to disconnect the connection between the connecting part 1 and the operating part 2, the buckle switch 612 is operated, the first elastic member is compressed, the first clamping member 611 is separated from the first clamping groove 42, at this time, the locking ring 6 is moved, the locking ring 6 is separated from the first positioning assembly structure 4 or the second positioning assembly structure 5, and then the connection of the first positioning assembly structure 4 is removed.

[0056] In summary, according to the endoscope surgery instrument provided in the embodiment one of the present application, the connection structure of the connecting part 1 and the operating part 2 is improved, in the assembly, the first positioning assembly structure 4 and the second positioning assembly structure 5 are butted, then the locking ring 6 is operated to realize the connection and fixation of the connecting part 1 and the operating part 2; when it is needed to replace the connecting part 1, the locking ring 6 can be directly operated to disconnect the connection between the connecting part 1 and the operating part 2; the operation is simple, and the assembly and replacement efficiency of the connecting part 1 is improved.

[0057] Embodiment two

[0058] Based on the endoscope surgery instrument in the embodiment one, the applicant finds that since the transmission part is a structure composed of wires and pulleys, the number of wires and the number of pulleys are both multiple, when the wires or the pulleys in the connecting part 1 are not accurately assembled or the wire circuit is damaged, the connecting part 1 can only be replaced, and the transmission part in the connecting part 1 cannot be repaired, therefore, in the embodiment, the connecting part 1 is designed as a structure that can be opened and closed.

[0059] Figure 3 The structure schematic diagram of the endoscope surgery instrument provided in the embodiment two of the present application is shown in FIG. 6, Figure 4 The structure schematic diagram of the connecting part 1 of the endoscope surgery instrument provided in the embodiment two of the present application when opened is shown in FIG. 7, in combination with FIG. 6, Figure 3 and FIG. 8, Figure 4 As shown in the drawings, in the embodiment, the connecting part 1 is designed to include a first part 11 and a second part 12 which can be butted into a tubular structure, the first part 11 and the second part 12 are hingedly connected through an arc-shaped connecting piece 13.

[0060] Specifically, the first part 11 of the embodiment is provided with a first opening 111 matched with the arc-shaped connecting piece 13, the second part 12 is provided with a second opening 121 matched with the arc-shaped connecting piece 13, the arc-shaped connecting piece 13 of the embodiment is arranged in the first opening 111 and the second opening 121, the opposite ends of the arc-shaped connecting piece 13 are hingedly connected with the first part 11 and the second part 12 respectively, so that the first part 11 and the second part 12 of the embodiment can be relatively rotated to realize opening and closing.

[0061] Further, in order to realize the fixation of the first part 11 and the second part 12 after closing, the second clamping groove 112 is arranged on the side wall of the first part 11 facing the second part 12, and the second part 12 of the embodiment is provided with a sliding channel (not shown in the figure) on the side wall facing the second clamping groove 112, and the second clamping piece 122 and the second elastic piece are installed on the sliding channel, and the second elastic piece is hiddenly installed on the sliding channel, and the second clamping piece 122 is provided with a friction surface exposed to sliding (not shown in the figure), and the second elastic piece (not shown in the figure) of the embodiment is fixedly connected to the sliding channel at one end and connected to the second clamping piece 122 at the other end, and the second clamping piece 122 is configured to be detachably connected with the second clamping groove 112.

[0062] When it is needed to open the connecting part 1 to expose the pulley and the wire in the connecting part 1, the second clamping piece 122 can be pressed and slid by the friction surface, the second elastic piece is compressed, and then the connection between the second clamping piece 122 and the second clamping groove 112 is released, and then the first part 11 and / or the second part 12 is rotated to open the connecting part 1 of the embodiment.

[0063] Similarly, in order to facilitate the replacement and maintenance of the pulley and the wire in the shell 22, the structure of the shell 22 is improved in the embodiment, but since the shell 22 is a structure that is grasped by medical staff during specific operation, it cannot be designed to directly slide and open the shell 22 outside, and it needs to be convenient to operate when opening, so the embodiment designs a hidden structure formed after the shell 22 is opened, which is different from the unfolding and closing mode of the above connecting part 1, can avoid the influence of the first operating piece 211 and the second operating piece 212, and does not occupy the external space and the internal space of the shell 22, avoiding the misoperation of the medical staff to open the shell 22 for a long time.

[0064] Figure 5 An exploded view of the shell 22 of the endoscopic surgical instrument provided in Embodiment Two of the present application, Figure 6 A structure schematic view of the shell 22 of the endoscopic surgical instrument provided in Embodiment Two of the present application in a closed state, Figure 7 A structure schematic view of the shell 22 of the endoscopic surgical instrument provided in Embodiment Two of the present application in an open state; combined with Figure 5 , attached Figure 6 and attached Figure 7 It is shown that the shell 22 of the embodiment includes a rotating ring 221, a base 222, a first arc-shaped shell 223, a second arc-shaped shell 224 and a third arc-shaped shell 225 installed on the base 222, a first elastic sheet 2267 and a second elastic sheet 2268, and a transmission assembly 226 and other functional structures.

[0065] The rotating ring 221 of the embodiment is located on the top of the shell 22. In order to avoid misoperation of medical staff, a sliding member 213 that can slide around the circumference of the outer wall of the end cover 21 is arranged on the outer wall of the end cover 21. The sliding member 213 is connected with the rotating ring 221 and is used to drive the rotating ring 221 to rotate. That is, in order to realize the rotation of the rotating ring 221, the operator needs to overcome the elastic force of the second elastic buckle 2212 and the third elastic buckle 2213 to move the sliding member 213. Therefore, when the operator holds the shell 22 to perform surgery, misoperation will not occur to open the second arc-shaped shell 224 and the third arc-shaped shell 225.

[0066] In order to realize the hidden opening and closing structure and avoid the influence of the first operating member 211 and the second operating member 212 during the opening and closing of the second arc-shaped shell 224 and the third arc-shaped shell 225, the shell 22 is designed to include the first arc-shaped shell 223, the second arc-shaped shell 224, and the third arc-shaped shell 225. The first arc-shaped shell 223, the second arc-shaped shell 224, and the third arc-shaped shell 225 of the embodiment can form a cylindrical structure in the closed state. The central angle corresponding to the first arc-shaped shell 223 is greater than or equal to 180°, and the central angle corresponding to the second arc-shaped shell 224 and the third arc-shaped shell 225 is less than or equal to 90°. The first arc-shaped shell 223 is fixedly installed on the base 222. The base 222 is provided with two arc-shaped tracks (not marked in the figure) on both sides of the first arc-shaped shell 223. The second arc-shaped shell 224 and the third arc-shaped shell 225 are installed on the two arc-shaped tracks in a one-to-one correspondence and are movable or slidable.

[0067] Further, the two side walls of the first arc-shaped shell 223 of the embodiment are designed to be hollow inside to form a first accommodation space 2231 and a second accommodation space 2232, respectively. An installation groove 2233 is arranged in the middle region of the top of the side wall of the first arc-shaped shell 223. A transmission assembly 226 is installed in the installation groove 2233 and is in transmission connection with the rotating ring 221, the second arc-shaped shell 224, and the third arc-shaped shell 225, respectively. The transmission assembly 226 is configured to rotate the rotating ring 221 around a first circumferential direction, drive the first arc-shaped shell 223 to move to the first accommodation space 2231, and drive the second arc-shaped shell 224 to move to the second accommodation space 2232. The transmission assembly 226 drives the first arc-shaped shell 223 to move away from the first accommodation space 2231 and drives the second arc-shaped shell 224 to move away from the second accommodation space 2232 when the rotating ring 221 is rotated around a second circumferential direction opposite to the first circumferential direction. The side of the second arc-shaped shell 224 facing the third arc-shaped shell 225 and the side of the third arc-shaped shell 225 facing the second arc-shaped shell 224 are closed to each other.

[0068] Specifically, the transmission assembly 226 of the embodiment includes a first rotating shaft 2261, a second rotating shaft 2262, a third rotating shaft 2263, a first bevel gear 2264, a second bevel gear 2265, a third bevel gear 2266, a first elastic sheet 2267, and a second elastic sheet 2268. The opposite ends of the first rotating shaft 2261 are rotatably connected to the side walls of the mounting groove 2233, and the second rotating shaft 2262 and the third rotating shaft 2263 are rotatably mounted to the bottom wall of the mounting groove 2233. The axial direction of the first rotating shaft 2261 is perpendicular to the axial directions of the second rotating shaft 2262 and the third rotating shaft 2263. The first bevel gear 2264 is coaxially connected to the first rotating shaft 2261, the second bevel gear 2265 is coaxially connected to the second rotating shaft 2262, and the third bevel gear 2266 is coaxially connected to the third rotating shaft 2263. The opposite sides of the first bevel gear 2264 are engaged with the second bevel gear 2265 and the third bevel gear 2266, respectively. The bottom surface of the rotating ring 221 is provided with a row of helical teeth 2211 along the circumferential direction, which are engaged with the first bevel gear 2264. One end of the first elastic sheet 2267 is connected to the second rotating shaft 2262, and the other end is connected to one side of the second arc-shaped shell 224. One end of the second elastic sheet 2268 is connected to the third rotating shaft 2263, and the other end is connected to one side of the third arc-shaped shell 225. In the closed state of the second arc-shaped shell 224 and the third arc-shaped shell 225, the first elastic sheet 2267 and the second elastic sheet 2268 have elastic prestress, which can make the first elastic sheet 2267 wrap around the second rotating shaft 2262 and the second elastic sheet 2268 wrap around the third rotating shaft 2263, while driving the second arc-shaped shell 224 into the first accommodating space 2231 and the third arc-shaped shell 225 into the second accommodating space 2232.

[0069] In order to realize the stability of the second arc-shaped shell 224 and the third arc-shaped shell 225 in the closed state, the top surface of the second arc-shaped shell 224 is provided with a third clamping groove 2241, the top surface of the third arc-shaped shell 225 is provided with a fourth clamping groove 2251, the rotating ring 221 is provided with a second elastic buckle 2212 and a third elastic buckle 2213, and in the mutual closed state of the side of the second arc-shaped shell 224 facing the third arc-shaped shell 225 and the side of the third arc-shaped shell 225 facing the second arc-shaped shell 224, the second elastic buckle 2212 is connected with the third clamping groove 2241, and the third elastic buckle 2213 is connected with the fourth clamping groove 2251, so as to overcome the elastic force of the first elastic sheet 2267 and the second elastic sheet 2268 and maintain the closed state of the second arc-shaped shell 224 and the third arc-shaped shell 225. The second elastic buckle 2212 and the third elastic buckle 2213 are configured to rotate the rotating ring 221 in the first circumferential direction, so that the second elastic buckle 2212 is separated from the third clamping groove 2241 and the third elastic buckle 2213 is separated from the fourth clamping groove 2251.

[0070] Figure 8The movement trajectory diagram of the second arc-shaped shell 224 and the third arc-shaped shell 225 of the endoscope surgery instrument provided in Embodiment Two of the present application is shown in the figure, the arrows in the figure are the movement directions of the second arc-shaped shell 224 and the third arc-shaped shell 225, the dotted line shape in the figure is the position diagram of the second arc-shaped shell 224 and the third arc-shaped shell 225 when entering the first arc-shaped shell 223, and the first spring sheet 2267 and the second spring sheet 2268 are not shown in the figure; the first arc-shaped shell 223 is shown in the figure, and the first arc-shaped shell 223 is provided with the first accommodating space 2231 and the second accommodating space 2232. Figure 8 As shown in the figure, in order to facilitate the second arc-shaped shell 224 and the third arc-shaped shell 225 to enter the above two accommodating spaces respectively, the width of the first accommodating space 2231 in the radial direction of the first arc-shaped shell 223 is greater than the thickness of the second arc-shaped shell 224, and the width of the second accommodating space 2232 in the radial direction of the first arc-shaped shell 223 is greater than the thickness of the third arc-shaped shell 225. The first arc-shaped shell 223 of the present embodiment comprises a first side wall and a second side wall located on both sides of the first accommodating space 2231. The inner wall surface of one side of the first side wall is provided with an inclined first guide surface 2234, and the other side is provided with an inclined second guide surface 2235.

[0071] Correspondingly, the outer wall surface of the second arc-shaped shell 224 of the present embodiment is provided with a third guide surface 2242 matched with the first guide surface 2234, and the outer wall surface of the third arc-shaped shell 225 is provided with a fourth guide surface 2252 matched with the second guide surface 2235. Through the cooperation of the above guide surfaces, the second arc-shaped shell 224 is facilitated to enter the first accommodating space 2231, and the third arc-shaped shell 225 is facilitated to enter the second accommodating space 2232.

[0072] In addition, in order to make the outer wall of the holding shell 22 form a smooth surface in the Figure 8 the first accommodating space 2231, the movement trajectory of the second arc-shaped shell 224 is not a circular arc shape, but an inflection point appears between the first guide surface 2234 and the third guide surface 2242. Similarly, the third arc-shaped shell 225 enters the second accommodating space 2232, and the second arc-shaped shell 224 at the inflection point is prone to jam even under the elastic restoring force of the first spring sheet 2267. Therefore, the present embodiment is provided with a first rotating connecting rod 24 between the first side wall and the second arc-shaped shell 224. One end of the first rotating connecting rod 24 is hingedly connected with a first moving piece which can be a sliding block or a roller structure, and the other end is rotatably installed on the second arc-shaped shell 224. A second rotating connecting rod 25 is provided between the first side wall and the third arc-shaped shell 225. One end of the second rotating connecting rod 25 is hingedly connected with a second moving piece which can be a sliding block or a roller structure, and the other end is rotatably installed on the third arc-shaped shell 225. The first rotating connecting rod 24 and the second rotating connecting rod 25 form a multi-link structure. The rotation of the first rotating connecting rod 24 and the second rotating connecting rod 25 at the inflection point of the movement of the second arc-shaped shell 224 and the third arc-shaped shell 225 can compensate for the movement of the second arc-shaped shell 224 and the third arc-shaped shell 225 at the inflection point, overcome the jamming of the two at the inflection point, and ensure the smooth opening of the shell 22.

[0073] It has to be noted that, in the present document, the terms "first", "second", etc. merely serve the purpose of distinguishing between two entities or operations, without necessarily requiring or implying any actual relationship or order between these entities or operations. Moreover, the terms "comprising", "having", etc. shall be interpreted as specifying the presence of stated elements but not excluding the presence of other elements or the possession of additional elements.

Claims

1. A laparoscopic surgical instrument, comprising a connecting part, an operating part, a transmission part and two clamps; one end of the connecting part is connected with the operating part, the other end is provided with two clamps, the transmission part is located in the operating part and the connecting part, and is connected with two clamps, the operating part drives two clamps to act through the transmission part; characterized in that: one end of the connecting part is provided with a first positioning assembly structure, the operating part is provided with a second positioning assembly structure which is inserted and matched with the first positioning assembly structure, wherein the first positioning assembly structure or the second positioning assembly structure is sleeved with a locking ring; the locking ring is configured to be movable to a first position and a second position, when in the first position, the locking ring is connected with the first positioning assembly structure and the second positioning assembly structure respectively, and limits the relative movement of the first positioning assembly structure and the second positioning assembly structure, when in the second position, the locking ring releases the connection of the first positioning assembly structure and the second positioning assembly structure; the connecting part comprises a first part and a second part which can be docked into a tubular structure, an arc-shaped connecting piece is arranged between the first part and the second part, the first part is provided with a first opening matched with the arc-shaped connecting piece, the second part is provided with a second opening matched with the arc-shaped connecting piece, the arc-shaped connecting piece is arranged in the first opening and the second opening and is hingedly matched with the first part and the second part respectively; a second clamping groove is formed in the side wall of the side of the first part facing the second part, a slide is arranged in the side wall of the side of the second part facing the second clamping groove, a second clamping piece and a second elastic piece are arranged on the slide, the second elastic piece is arranged in the slide in a hidden manner, and the second clamping piece is provided with a friction surface exposed to the slide; one end of the second elastic piece is fixedly connected with the slide, and the other end is connected with the second clamping piece, and the second clamping piece is configured to be detachably connected with the second clamping groove.

2. The laparoscopic surgical instrument according to claim 1, characterized in that: the first positioning assembly structure comprises a first connecting pipe, and the second positioning assembly structure comprises a second connecting pipe; a positioning protrusion is arranged on the outer wall of the first connecting pipe, and a positioning groove is arranged on the outer wall of the second connecting pipe, and the shape and size of the positioning groove are matched with those of the positioning protrusion.

3. The laparoscopic surgical instrument according to claim 2, characterized in that: a plurality of strip-shaped grooves are arranged on the outer wall surface of the first connecting pipe in a circumferential direction, and the positioning protrusion is formed between two adjacent strip-shaped grooves.

4. The laparoscopic surgical instrument according to claim 2, characterized in that: an inclined first guide surface is arranged on the end of the positioning protrusion away from the clamp, and the distance between the first guide surface and the inner cavity of the connecting part gradually decreases in the direction away from the clamp.

5. The laparoscopic surgical instrument according to any one of claims 1-4, characterized in that: a first internal thread is arranged on the inner wall of the locking ring, and a second internal thread which is threadedly connected with the first internal thread is arranged on the connecting part and the operating part.

6. The endoscope surgical instrument according to any one of claims 1-4, characterized in that: the locking ring is slidingly mounted on the first positioning assembly and the second positioning assembly, at least one of the opposite ends of the locking ring is provided with a first elastic buckle, and the first positioning assembly and / or the second positioning assembly is provided with a first clamping groove matched with the first elastic buckle.

7. The endoscope surgical instrument according to claim 6, characterized in that: the first elastic buckle comprises a first elastic member and a first clamping member connected with each other, the first elastic member is configured to be compressed when the locking ring is slidingly mounted; the first clamping member is clamped in the first clamping groove, the two side walls of the first clamping member are provided with second guide surfaces, and the distance between the two adjacent second guide surfaces gradually decreases in the direction approaching the bottom wall of the first clamping groove.

8. The endoscope surgical instrument according to claim 1, characterized in that: the operation part comprises an end cover, a shell and an adapter arm connected in sequence from top to bottom; the end cover is rotatably mounted with a first operation member and a second operation member, and the first operation member and the second operation member are both provided with operation holes; the adapter arm is rotatable on the shell around the shell axis, and the second positioning assembly is arranged on the adapter arm.

9. The endoscope surgical instrument according to claim 8, characterized in that: the adapter arm comprises a first arm body and a second arm body, and the first arm body and the second arm body are relatively rotatable in the direction perpendicular to the shell axis.

10. The surgical instrument of claim 8, wherein: the outer wall of the shell comprises a first straight section, a first curved section, a second straight section, a second curved section and a third straight section in sequence from top to bottom, and the bending directions of the first curved section and the second curved section are opposite.

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