Spreading assembly and minimally invasive surgical spreader

Abstract

The application discloses a distraction assembly and a minimally invasive surgery distraction device. The minimally invasive surgery distraction device comprises a driving assembly, a first distraction assembly and a second distraction assembly. The driving assembly is used for driving the first distraction assembly to move relative to the second distraction assembly to adjust the distance between the first distraction assembly and the second distraction assembly. The first distraction assembly comprises a connecting piece, a distraction piece and a driving piece. The connecting piece is connected with the driving assembly. The distraction piece is rotationally connected with the connecting piece. The distraction piece can rotate relative to the connecting piece around a rotation axis. The distraction piece comprises a connecting groove extending in a first direction. The driving piece comprises a driving part located in the connecting groove. The driving part can rotate in the connecting groove relative to the distraction piece and move in the first direction to drive the distraction piece to rotate around the rotation axis. The minimally invasive surgery distraction device can accurately drive the distraction piece to rotate relative to the connecting piece around the rotation axis by a certain angle to expand the surgical field of view, so that the doctor can operate more conveniently and the surgical efficiency can be improved.

Description

Technical Field

[0001] This application relates to the field of medical device technology, and in particular to a dispersing component and a minimally invasive surgical dispersing device. Background Technology

[0002] Minimally invasive surgical retractors are commonly used medical devices used to open up patient tissues and create surgical access during minimally invasive surgery. Minimally invasive surgical retractors work by inserting at least two retracting components into the surgical access channel, and then driving the at least two retracting components to move away from each other through a drive component, thereby opening up the patient tissues, expanding the surgical access channel, and facilitating the surgeon to perform the operation.

[0003] In some surgical scenarios, surgeons need to tilt at least one retractor component outward at a certain angle to expand the surgical field. However, the retractor components of minimally invasive surgical instruments in related technologies cannot accurately adjust the outward tilt angle after the patient's tissues have been opened, affecting surgical efficiency. Utility Model Content

[0004] This application provides a minimally invasive surgical retractor, which aims to solve the problem that the retractor component of the minimally invasive surgical instruments in the related art cannot accurately adjust the outward tilt angle of the retractor component after retracting the patient's tissue, thus affecting the efficiency of the operation.

[0005] This application provides a minimally invasive surgical retractor, including a driving component and at least two retractor components. The driving component is used to drive at least one of the retractor components to move relative to the other retractor component, thereby adjusting the distance between the at least two retractor components. At least one of the retractor components includes:

[0006] Connector, which is connected to the drive assembly;

[0007] A support member is rotatably connected to the connecting member. The support member can rotate relative to the connecting member about a rotation axis. The support member includes a connecting groove extending along a first direction, which is set at an angle to the rotation axis.

[0008] A driving component, movably connected to the connecting component, the driving component including a driving part located within the connecting groove;

[0009] The driving member is movable relative to the connecting member, so that the driving part rotates and moves relative to the spreading member within the connecting groove and along the first direction, thereby driving the spreading member to rotate about the rotation axis.

[0010] In some embodiments, the connecting groove includes a slot extending along the first direction, the width of which is less than the maximum width of the driving portion; and / or,

[0011] The expanding member further includes a limiting portion, which is used to limit the driving portion within the connecting groove; and / or

[0012] The driving part is spherical, and the outline of the inner circumferential surface of the connecting groove in the cross section perpendicular to the first direction is a superior arc; the distance between the two ends of the superior arc is smaller than the diameter of the driving part.

[0013] In some embodiments, the driving member can drive the driving part to move relative to the connecting member in a second direction, so that the driving part rotates relative to the spreading member and moves in the first direction within the connecting groove, the second direction forming an angle with the first direction, and the first direction and the second direction being substantially perpendicular to the axis of rotation.

[0014] In some embodiments, the drive member is threadedly connected to the connector, and the drive member can rotate helically relative to the connector to drive the drive part to move along the second direction.

[0015] In some embodiments, the expansion member includes an expansion plate and a connector, the expansion plate and the connector are detachably connected, the connector is rotatable relative to the connector about the rotation axis, and the connecting groove is formed in the connector.

[0016] In some embodiments, one of the connector and the expansion plate is provided with a connection hole and a locking mechanism, and the other of the connector and the expansion plate is provided with a connecting rod. The connecting rod is used to insert into the connection hole, and the locking mechanism is used to lock the connecting rod to prevent the connecting rod from exiting the connection hole. The locking mechanism is also used to unlock the connecting rod so that the connecting rod can exit the connection hole.

[0017] In some embodiments, a positioning groove is provided on the outer peripheral surface of the connecting rod. When the connecting rod is inserted into the connecting hole, the locking mechanism can be inserted into the positioning groove to lock the connecting rod; the locking mechanism can also be removed from the positioning groove to unlock the connecting rod.

[0018] In some embodiments, the locking mechanism includes an elastic member, a pusher, and a positioning member. The pusher is movable relative to the connector between a locked position and an unlocked position. The elastic member is used to drive the pusher from the unlocked position to the locked position, so that the pusher pushes the positioning member into the positioning groove.

[0019] The pusher can also move from the locked position to the unlocked position under the action of external force, so that the positioning member can be pushed out of the positioning groove by the connecting rod.

[0020] In some embodiments, the pusher is slidable relative to the connector between the locked position and the unlocked position, the pusher has two abutting portions distributed sequentially along its sliding direction, and the connector has a limiting member, the limiting member being at least partially located between the two abutting portions;

[0021] When the pusher slides from the unlock position to the lock position, the limiting member abuts against one of the abutting parts to restrict the pusher from continuing to slide; when the pusher slides from the lock position to the unlock position, the limiting member abuts against the other abutting part to restrict the pusher from continuing to slide.

[0022] In some embodiments, one of the connector and the expansion plate is provided with at least one anti-rotation protrusion, and the other of the connector and the expansion plate is provided with at least one anti-rotation groove. When the connecting rod is inserted into the connecting hole, the anti-rotation protrusion is used to insert into the anti-rotation groove to restrict the connecting rod from rotating within the connecting hole.

[0023] In some embodiments, the expansion plate includes a plate body, an anti-rotation part, a locking member, and the connecting rod. The connecting rod passes through the anti-rotation part and the plate body in sequence and is connected to the locking member to lock the plate body, the anti-rotation part, and the connecting rod. The anti-rotation part is provided with an anti-rotation protrusion or an anti-rotation groove on the side opposite to the plate body.

[0024] The anti-rotation part has a protrusion on the side facing the plate, and the plate has a groove on the side facing the anti-rotation part. The protrusion is inserted into the groove to restrict the relative rotation of the plate and the anti-rotation part.

[0025] In some embodiments, at least one of the spreading components includes a connector, the connector includes a plug portion, and the drive component includes a plug slot, the plug portion being inserted into the plug slot to connect the connector to the drive component;

[0026] The plug-in portion includes two opposing outer surfaces, and the plug-in groove includes two opposing inner surfaces. In the direction in which the plug-in portion is inserted into the plug-in groove, the distance between the two outer surfaces gradually decreases, and the distance between the two inner surfaces gradually decreases. The included angle formed by the two outer surfaces is greater than the included angle formed by the two inner surfaces. When the plug-in portion is inserted into the plug-in groove, the two outer surfaces and the two inner surfaces abut against each other in a one-to-one correspondence.

[0027] In some embodiments, the difference between the included angle formed by the two outer surfaces and the included angle formed by the two inner surfaces is greater than or equal to 2° and less than or equal to 6°.

[0028] In some embodiments, the drive assembly further includes a locking mechanism, which locks the plug portion when the plug portion is inserted into the plug slot to prevent the plug portion from exiting the plug slot.

[0029] In some embodiments, the plug portion is provided with a locking portion, and the locking mechanism includes a locking portion;

[0030] Wherein, the locking part includes a first inclined surface, the first inclined surface being located on the side of the locking part along the direction in which the plug part exits the plug groove, and the locking part being used to abut against the first inclined surface to lock the plug part; and / or,

[0031] The locking part includes a second inclined surface, which is located on one side of the locking part along the direction in which the plug part is inserted into the plug groove. The second inclined surface is used to abut against the locking part to lock the plug part.

[0032] This application embodiment also provides a spreading component, including:

[0033] A connector for connection to a drive assembly of a minimally invasive surgical retractor, such that the drive assembly can drive the connector to move.

[0034] A support member is rotatably connected to the connecting member. The support member can rotate relative to the connecting member about a rotation axis. The support member includes a connecting groove extending along a first direction, which is set at an angle to the rotation axis.

[0035] A driving component, movably connected to the connecting component, the driving component including a driving part located within the connecting groove;

[0036] The driving member is movable relative to the connecting member, so that the driving part rotates and moves relative to the spreading member within the connecting groove and along the first direction, thereby driving the spreading member to rotate about the rotation axis.

[0037] The minimally invasive surgical retractor provided in this application embodiment drives at least one retractor component to move relative to another retractor component through a drive component, so as to adjust the distance between at least two retractor components, so that at least two retractor components can retract the patient's tissue and expand the surgical access channel.

[0038] Meanwhile, by including at least one spreading component, a connector, a spreading member, and a driving member, the spreading member can rotate relative to the connector about a rotation axis. A connecting groove extending in a first direction is formed in the spreading member, and the driving part of the driving member is located in the connecting groove and rotates and moves in the first direction within the connecting groove. When the driving member drives the driving part to move relative to the connector, causing the driving part to rotate in the connecting groove and move a certain distance in the first direction, it can accurately drive the spreading member to rotate a certain angle relative to the connector about a rotation axis, thereby expanding the surgical field of view, making the operation more convenient for the doctor, and improving the efficiency of the operation. Attached Figure Description

[0039] The technical solution and other beneficial effects of this application will become apparent from the following detailed description of specific embodiments in conjunction with the accompanying drawings.

[0040] Figure 1 A schematic diagram of the structure of one embodiment of the minimally invasive surgical retractor provided in this application;

[0041] Figure 2 for Figure 1 Enlarged view of point A in the middle;

[0042] Figure 3 A cross-sectional view of one embodiment of the spreading component provided in this application, wherein the cutting plane is parallel to the first direction and the second direction;

[0043] Figure 4 A cross-sectional view of an embodiment of the opening component provided in this application, wherein the cutting plane is parallel to the first direction and the second direction, and the opening member is rotated about a certain angle relative to the connecting member about the rotation axis.

[0044] Figure 5 A schematic diagram of the structure of one embodiment of the connector provided in this application;

[0045] Figure 6 This is a cross-sectional view of the connector provided in an embodiment of this application, wherein the cutting plane is perpendicular to the extension direction of the connecting hole, and the pusher is in the unlocked position;

[0046] Figure 7 A cross-sectional view of the connector provided in an embodiment of this application, wherein the cutting plane is perpendicular to the extension direction of the connecting hole, and the pusher is in the locked position;

[0047] Figure 8 A cross-sectional view of one embodiment of the support member provided in this application, wherein the cutting plane is parallel to the extension direction of the connecting hole;

[0048] Figure 9 An exploded view of one embodiment of the support member provided in this application;

[0049] Figure 10 This is a schematic diagram of the structure of the drive component and connector provided in the embodiments of this application;

[0050] Figure 11 Cross-sectional view of the drive assembly and connector provided in an embodiment of this application;

[0051] Figure 12 for Figure 11 Enlarged view of point B in the middle.

[0052] Explanation of reference numerals in the attached figures:

[0053] 1-Minimally invasive surgical retractor; 10-Drive assembly; 11-Drive mechanism; 111-Mounting rod; 112-Connecting seat; 1121-Insertion groove; 1122-Inner surface; 113-Locking mechanism; 1131-Button; 1132-Locking part; 1133-Second inclined surface; 1134-Elastic structure; 20-Retractor assembly; 21-Connector; 211-Mounting groove; 212-Mounting part; 213-Threaded hole; 214-Insertion part; 2141-Outer surface; 2142-Locking part; 2143-First inclined surface; 22-Pin; 23-Retractor; 231-Connector head; 2311-Connecting groove; 2312-Groove; 2313-Connecting hole; 2314-Sliding hole; 2315-First mounting hole; 2316-Second mounting hole; 2317-Anti-rotation groove; 232-Locking mechanism; 2321-Elastic element; 2322-Pushing element; 2323-Abutting part; 2324-Receiving groove; 2325-Positioning element; 233-Spreading plate; 2331-Connecting rod; 2332-Positioning groove; 2333-Plate body; 2334-Sinking groove; 2335-Second through hole; 2336-Anti-rotation part; 2337-Anti-rotation protrusion; 2338-Protrusion; 2339-First through hole; 2340-Locking element; 2341-Limiting element; 24-Drive element; 241-Drive part; 242-Threaded rod; X-First direction; Y-Second direction; X1-Rotation axis. Detailed Implementation

[0054] The technical solutions of the embodiments of this application will be clearly and completely described below with reference to the accompanying drawings. Obviously, the described embodiments are only a part of the embodiments of this application, and not all of them. All other embodiments obtained by those skilled in the art based on the embodiments of this application without creative effort are within the scope of protection of this application.

[0055] In the description of this application, it should be understood that the terms "center," "longitudinal," "lateral," "length," "width," "thickness," "upper," "lower," "front," "rear," "left," "right," "vertical," "horizontal," "top," "bottom," "inner," "outer," "clockwise," and "counterclockwise," etc., indicating orientation or positional relationships based on the orientation or positional relationships shown in the accompanying drawings, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this application. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include one or more of the stated features. In the description of this application, "a plurality of" means two or more, unless otherwise explicitly specified.

[0056] In the description of this application, it should be noted that, unless otherwise expressly 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, an electrical connection, or a connection that allows communication between them; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication between two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0057] In this application, unless otherwise expressly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature being directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature being directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0058] The following disclosure provides many different embodiments or examples for implementing different structures of this application. To simplify the disclosure, specific examples of components and arrangements are described below. Of course, these are merely examples and are not intended to limit the scope of this application. Furthermore, reference numerals and / or letters may be repeated in different examples; such repetition is for simplification and clarity and does not in itself indicate a relationship between the various embodiments and / or arrangements discussed. In addition, examples of various specific processes and materials are provided in this application, but those skilled in the art will recognize the application of other processes and / or the use of other materials.

[0059] This application provides a retraction component and a minimally invasive surgical retractor. These will be described in detail below.

[0060] Figure 1 This is a schematic diagram of one embodiment of the minimally invasive surgical retractor provided in this application. Figure 1 As shown, the minimally invasive surgical retractor 1 includes a drive component 10 and at least two retractor components 20. The drive component 10 is used to drive at least one retractor component 20 to move relative to another retractor component 20 to adjust the distance between the at least two retractor components 20, so that the at least two retractor components 20 move closer to or further away from each other.

[0061] In minimally invasive surgery, at least two of the retractor components 20 of the minimally invasive surgical retractor 1 can be inserted into the surgical access channel. Then, the drive component 10 drives at least one retractor component 20 to move relative to the other retractor component 20, thereby increasing the distance between the at least two retractor components 20 and opening the surgical access channel so that the surgeon can perform surgical operations through the surgical access channel.

[0062] It should be noted that the number of spreading components 20 can be two, three, four or more. The driving component 10 can directly drive one spreading component 20 to move relative to another, thereby increasing the distance between the two spreading components 20. Alternatively, the driving component 10 can drive two or more spreading components 20 to move relative to each other, thereby increasing the distance between the two or more spreading components 20.

[0063] In some embodiments, such as Figure 1As shown, the drive assembly 10 includes multiple drive mechanisms 11, which are connected to multiple spreading assemblies 20 to drive the spreading assemblies 20 to move. Two spreading assemblies 20 are arranged opposite each other, and one drive mechanism 11 is connected to these two spreading assemblies 20 to drive them to move, causing them to move closer or further apart, thereby adjusting the distance between them in the first direction X. The distribution direction of the other two spreading assemblies 20 forms an angle with the distribution direction of the first two spreading assemblies 20. Another drive mechanism 11 is connected to two other spreading assemblies 20 to drive them to move closer or further apart, thereby adjusting the distance between them in the second direction Y.

[0064] In some embodiments, such as Figure 2 and Figure 3 As shown, the retraction assembly 20 may include a connector 21 and a retraction member 23. The connector 21 is connected to the drive assembly 10, and the retraction member 23 is connected to the connector 21. When the retraction member 23 of the retraction assembly 20 is inserted into the surgical access channel, the drive assembly 10 can drive the connector 21 to move, thereby causing the retraction member 23 of the retraction assembly 20 to move away from the other retraction assembly 20, so that the retraction member 23 abuts against the patient tissue and opens the surgical access channel.

[0065] Among them, such as Figures 2 to 4 As shown, at least one spreading assembly 20 can have its spreading member 23 rotatably connected to the connecting member 21, and the spreading member 23 can rotate relative to the connecting member 21 about the rotation axis X1. Simultaneously, the at least one spreading assembly 20 also includes a driving member 24, which is movably connected to the connecting member 21. The driving member 24 can move relative to the connecting member 21 to drive the spreading member 23 to rotate relative to the connecting member 21 about the rotation axis X1, thereby causing the spreading member 23 of at least one spreading assembly 20 to swing at a certain angle away from the other spreading assembly 20, thus expanding the surgical field of view.

[0066] Specifically, such as Figures 2 to 4 As shown, the drive assembly 10 may include a mounting rod 111, and the connector 21 may include a mounting groove 211. The mounting rod 111 passes through the mounting groove 211 of the connector 21, so that the mounting rod 111 of the drive assembly 10 is connected to the connector 21 of the spreading assembly 20. The drive assembly 10 can move by driving the mounting rod 111 to drive the spreading assembly 20 to move. The connector 21 can move along the extension direction of the mounting rod 111 to adjust the position of the spreading assembly 20.

[0067] In some embodiments, at least one spreading member 23 of the spreading assembly 20 may include a connecting groove 2311 extending along a first direction X, the first direction X being angled with the rotation axis X1. The driving member 24 includes a driving portion 241 located within the connecting groove 2311, the driving member 24 being movable relative to the connecting member 21, such that the driving portion 241 rotates and moves relative to the spreading member 23 within the connecting groove 2311 along the first direction X, thereby driving the spreading member 23 to rotate about the rotation axis X1.

[0068] The minimally invasive surgical retractor 1 provided in this application embodiment drives at least one retractor 20 to move relative to another retractor 20 through a drive component 10, so as to adjust the distance between at least two retractor 20, so that at least two retractor 20 can retract the patient's tissue and expand the surgical access channel.

[0069] Meanwhile, by including at least one spreading component 20, a connector 21, a spreading component 23, and a driving component 24, the spreading component 23 can rotate relative to the connector 21 about the rotation axis X1. A connecting groove 2311 extending along the first direction X is formed in the spreading component 23. The driving part 241 of the driving component 24 is located in the connecting groove 2311 and rotates and moves along the first direction X within the connecting groove 2311. When the driving component 24 drives the driving part 241 to move relative to the connector 21, and the driving part 241 rotates and moves a certain distance along the first direction X within the connecting groove 2311, it can accurately drive the spreading component 23 to rotate relative to the connector 21 about the rotation axis X1 by a certain angle, thereby expanding the surgical field of view, making the operation more convenient for the doctor, and improving the efficiency of the operation.

[0070] In some embodiments, the connecting groove 2311 may include a slot 2312 extending along the first direction X, the width of the slot 2312 being less than the maximum width of the driving part 241, thereby preventing the connecting part of the driving member 24 from coming out of the slot 2312 of the connecting groove 2311, so that the connecting part of the driving member 24 can rotate stably within the connecting groove 2311 and move along the first direction X, thereby driving the spreading member 23 to rotate relative to the connecting member 21 about the rotation axis X1.

[0071] Among them, such as Figures 3 to 5 As shown, the connecting part can be spherical, and the outline of the inner circumferential surface of the connecting groove 2311 in a section perpendicular to the first direction X is a superior arc, and the distance between the two ends of the superior arc is less than the diameter of the driving part 241. It can be understood that by making the outline of the inner circumferential surface of the connecting groove 2311 in a section perpendicular to the first direction X a superior arc, and the distance between the two ends of the superior arc is less than the diameter of the driving part 241, the width of the groove opening 2312 of the connecting groove 2311 can be less than the maximum width of the driving part 241.

[0072] In other embodiments, the expanding member 23 may also include a limiting portion (not shown in the figure), which is used to limit the driving part 241 within the connecting groove 2311 to prevent the driving part 241 from dislodging from the connecting groove 2311. The limiting portion may be located inside or outside the connecting groove 2311, as long as it can abut against the driving member 24 or the driving part 241 to limit the driving part 241 within the connecting groove 2311.

[0073] In some embodiments, the driving member 24 can drive the driving part 241 to move relative to the connecting member 21 along the second direction Y, so that the driving part 241 rotates relative to the supporting member 23 and moves along the first direction X within the connecting groove 2311. The second direction Y forms an angle with the first direction X, and the first direction X and the second direction Y are respectively substantially perpendicular to the rotation axis X1. Thus, by controlling the distance the driving member 24 moves along the second direction Y, the doctor can accurately control the angle of rotation of the supporting member 23 relative to the connecting member 21 about the rotation axis X1.

[0074] The driving member 24 can be threadedly connected to the connecting member 21, allowing the driving member 24 to rotate helically relative to the connecting member 21, thereby driving the driving part 241 to move along the second direction Y. This allows for more precise adjustment of the distance the driving member 24 drives the driving part 241 to move in the second direction Y. Furthermore, once the driving member 24 has driven the driving part 241 to a predetermined position in the second direction Y, it can stably maintain that position, thus keeping the opening angle of the spreading member 23 stable.

[0075] Specifically, the expanding member 23 includes a connector 231, and the connector 21 and the expanding member 23 are rotatably connected by a pin 22. The axial direction of the pin 22 is parallel to the rotation axis X1. The pin 22 is located at one end of the expanding member 23 along the first direction X. A portion of the pin is located within a connecting groove 2311. The connector 21 includes a mounting portion 212, which has a threaded hole 213 extending along the second direction Y. The driving member 24 includes a threaded rod 242, which passes through the threaded hole 213 to thread the driving member 24 to the mounting portion 212 of the connector 21. The connector 231 is located on one side of the mounting portion 212 along the second direction Y. The groove 2312 of the connecting groove 2311 is located on the side of the connector 231 near the mounting portion 212. The driving portion 241 of the driving member 24 is located at the end of the threaded rod 242 near the connector 231.

[0076] In this embodiment, the maximum angle at which the driving member 24 drives the spreading member 23 to swing relative to the connecting member 21 can be determined according to the structure of the spreading assembly 20. For example, the maximum angle at which the driving member 24 drives the spreading member 23 to swing relative to the connecting member 21 can be 65°. Specifically, the maximum outward swing angle at which the driving member 24 drives the spreading member 23 to swing relative to the connecting member 21 can be 45°. The maximum inward swing angle at which the driving member 24 drives the spreading member 23 to swing relative to the connecting member 21 can be 20°.

[0077] In some embodiments, such as Figure 3 and Figure 4 As shown, the retractor 23 can include a retractor plate 233 and a connector 231. The retractor plate 233 and the connector 231 are detachably connected. The connector 231 can rotate relative to the connector 21 about a rotation axis X1. A connecting groove 2311 is formed in the connector 231. Thus, the retractor 23 is rotatably connected to the connector 21 through the connector 231. When the connector 231 rotates relative to the connector 21 about a rotation axis X1, it can drive the retractor plate 233 to rotate, causing the retractor plate 233 to retract the patient's tissue. Moreover, by making the retractor plate 233 and the connector 231 detachably connected, the doctor can replace the retractor plate 233 with different specifications, models, or sizes according to the needs of the surgery, improving the applicability of the minimally invasive surgical retractor 1. In addition, when the retractor plate 233 is damaged, a new retractor plate 233 can be directly replaced, making the maintenance of the minimally invasive surgical retractor 1 more convenient.

[0078] In some embodiments, such as Figures 5 to 8 As shown, a connecting hole 2313 and a locking mechanism 232 can be provided in one of the connector 231 and the expansion plate 233, and a connecting rod 2331 can be provided in the other of the connector 231 and the expansion plate 233. The connecting rod 2331 is used to insert into the connecting hole 2313, and the locking mechanism 232 is used to lock the connecting rod 2331 to prevent the connecting rod 2331 from exiting the connecting hole 2313. The locking mechanism 232 is also used to unlock the connecting rod 2331, so that the connecting rod 2331 can exit the connecting hole 2313. Thus, by inserting the connecting rod 2331 into the connecting hole 2313 and locking the connecting rod 2331 by the locking mechanism 232, the connecting rod 2331 can be prevented from exiting the connecting hole 2313, thereby making the connection between the connector 231 and the expansion plate 233 more stable and convenient. When it is necessary to separate the expansion plate 233 from the connector 231, the locking mechanism 232 unlocks the connecting rod 2331, and then the connecting rod 2331 is removed from the connecting hole 2313. The operation is very convenient.

[0079] It should be noted that the connector 231 may be provided with a connecting hole 2313 and a locking mechanism 232, and the expansion plate 233 may be provided with a connecting rod 2331. Alternatively, the connector 231 may be provided with a connecting rod 2331, and the expansion plate 233 may be provided with a connecting hole 2313 and a locking mechanism 232.

[0080] like Figure 8 As shown, a positioning groove 2332 can be formed on the outer peripheral surface of the connecting rod 2331. When the connecting rod 2331 is inserted into the connecting hole 2313, the locking mechanism 232 can be inserted into the positioning groove 2332 to lock the connecting rod 2331. Moreover, the locking mechanism 232 can also be removed from the positioning groove 2332 to unlock the connecting rod 2331. Therefore, the locking mechanism 232 locks the connecting rod 2331 in a relatively simple way and can stably lock the connecting rod 2331.

[0081] The locking mechanism 232 may include an elastic element 2321, a pushing element 2322, and a positioning element 2325. The pushing element 2322 can move relative to the connector 231 between a locked position and an unlocked position. The elastic element 2321 is used to drive the pushing element 2322 from the unlocked position (e.g., ...). Figure 6 (As shown) Move to the locked position (e.g.) Figure 7 As shown), the pusher 2322 pushes the positioning member 2325 into the positioning groove 2332. Thus, the pusher 2322 of the locking mechanism 232 can be held in the locked position by the elastic member 2321, so that the pusher 2322 pushes the positioning member 2325 to stably lock the connecting rod 2331.

[0082] The pusher 2322 can also move from the locked position to the unlocked position under the action of external force, so that the positioning member 2325 can exit the positioning groove 2332 under the push of the connecting rod 2331. Thus, by manually or using other equipment to apply external force to the pusher 2322, the pusher 2322 can move from the locked position to the unlocked position. When the connecting rod 2331 is pulled out from the connecting hole 2313, the positioning member 2325 can exit the positioning groove 2332 under the push of the connecting rod 2331 without obstructing the connecting rod 2331, making the separation of the connecting rod 2331 and the connector 231 smoother.

[0083] It should be noted that the pusher 2322 can slide relative to the connector 231 between the locked and unlocked positions, and the pusher 2322 can also rotate relative to the connector 231 between the locked and unlocked positions. The elastic force applied by the elastic member 2321 to the pusher 2322 can be a pushing force or a pulling force, as long as it can drive the pusher 2322 from the unlocked position to the locked position. The elastic member 2321 can be any elastic structure 1134, such as a spring, torsion spring, or rubber, that can apply an elastic force to the pusher 2322 to keep it in the locked position, or to move the pusher 2322 from the unlocked position to the locked position; there are no restrictions here.

[0084] In some embodiments, the pusher 2322 can slide relative to the connector 21 between a locked position and an unlocked position. Moreover, the pusher 2322 has two abutment portions 2323 distributed sequentially along its sliding direction, and the connector 21 has a limiting member 2341, which is at least partially located between the two abutment portions 2323.

[0085] When the pusher 2322 slides from the unlock position to the locked position, the limiter 2341 abuts against one of the abutting parts 2323 to restrict the pusher 2322 from continuing to slide; when the pusher 2322 slides from the locked position to the unlock position, the limiter 2341 abuts against the other abutting part 2323 to restrict the pusher 2322 from continuing to slide.

[0086] Understandably, by positioning at least a portion of the limiting member 2341 between the two abutting portions 2323, when the pushing member 2322 slides from the unlocked position to the locked position and the limiting member 2341 abuts against one of the abutting portions 2323, the pushing member 2322 can be restricted from continuing to slide in the direction from the unlocked position to the locked position, so that the pushing member 2322 stops accurately in the locked position; when the pushing member 2322 slides from the locked position to the unlocked position and the limiting member 2341 abuts against the other abutting portion 2323, the pushing member 2322 can be restricted from continuing to slide in the direction from the locked position to the unlocked position, so that the pushing member 2322 stops accurately in the unlocked position.

[0087] like Figure 6 and Figure 7 As shown, a sliding hole 2314 can be provided in the connector 231. The pusher 2322 is slidably installed in the sliding hole 2314 along the extending direction of the sliding hole 2314, so that the pusher 2322 is slidably connected to the connector 231. One end of the pusher 2322 passes through the opening at one end of the sliding hole 2314 and extends out of the outer surface of the connector 231. An elastic member 2321 is provided in the sliding hole 2314, and the other end of the pusher 2322 is connected to the elastic member 2321, so that the elastic member 2321 applies a pushing force to the pusher 2322, causing the pusher 2322 to slide out of the sliding hole 2314.

[0088] Two abutment portions 2323 are provided on the outer periphery of the pusher 2322, and the two abutment portions 2323 are spaced apart along the extending direction of the sliding hole 2314. A limiting member 2341 protrudes from the inner peripheral surface of the sliding hole 2314, and a portion of the limiting member 2341 is located between the two abutment portions 2323. When the elastic member 2321 pushes the pusher 2322 outward toward the sliding hole 2314 to a certain distance, the limiting member 2341 abuts against the abutment portion 2323 closer to the elastic member 2321, thereby limiting the pusher 2322 from continuing to slide and keeping the pusher 2322 in the locked position.

[0089] When it is necessary to move the pusher 2322 to the unlocked position, the part of the limiter 2341 extending out of the connector 231 can be pressed by hand or tool, so that the pusher 2322 slides a certain distance into the sliding hole 2314. Then, the limiter 2341 abuts against the abutment 2323 that is away from the elastic member 2321 among the two abutment parts 2323, thereby restricting the pusher 2322 from continuing to slide and keeping the pusher 2322 in the unlocked position.

[0090] Specifically, a first mounting hole 2315 communicating with the sliding hole 2314 can be formed in the connector 231. The limiting member 2341 is installed in the first mounting hole 2315 to facilitate the installation of the limiting member 2341 and to make the structure more stable. Specifically, the extension direction of the sliding hole 2314 is substantially perpendicular to the extension direction of the connecting hole 2313. The first mounting hole 2315 is located on the side of the sliding hole 2314 away from the connecting hole 2313. The extension direction of the first mounting hole 2315 is perpendicular to both the extension direction of the connecting hole 2313 and the extension direction of the sliding hole 2314. The limiting member 2341 extends to the outer surface of the connector 231 and is installed in the first mounting hole 2315, and is threadedly connected to the inner wall of the first mounting hole 2315 to facilitate the installation of the limiting member 2341.

[0091] In some embodiments, a second mounting hole 2316 may be provided in the connector 231, connecting the sliding hole 2314 and the connecting hole 2313, and the positioning member 2325 may be movably mounted in the second mounting hole 2316. When the pusher 2322 moves from the unlocked position to the locked position, the pusher 2322 pushes the positioning member 2325 toward the connecting hole 2313, causing a portion of the positioning member 2325 to extend out of the inner circumferential surface of the connecting hole 2313, thereby allowing the positioning member 2325 to be inserted into the positioning groove 2332 of the connecting rod 2331. When the pusher 2322 moves from the locked position to the unlocked position, the pushing force of the pusher 2322 on the positioning member 2325 weakens or disappears. When the connecting rod 2331 is pulled out of the connecting hole 2313, the positioning member 2325 may move toward the second mounting hole 2316 and exit the positioning groove 2332 under the push of the connecting rod 2331.

[0092] A receiving groove 2324 can be provided on the side of the pusher 2322 facing the second mounting hole 2316. When the pusher 2322 moves from the unlocked position to the locked position, the side of the pusher 2322 facing the second mounting hole 2316 will abut against the positioning member 2325, pushing the positioning member 2325 into the positioning groove 2332 of the connecting rod 2331. When the pusher 2322 moves from the locked position to the unlocked position, the receiving groove 2324 of the pusher 2322 corresponds to the position of the second mounting hole 2316, so that the positioning member 2325 can move towards the sliding hole 2314 under the push of the connecting rod 2331, and a part of the positioning member 2325 can be accommodated in the receiving groove 2324, so that the positioning member 2325 can avoid the connecting rod 2331, so that the connecting rod 2331 can be removed from the connecting hole 2313.

[0093] Specifically, the positioning element 2325 has a spherical structure and can slide or roll within the second mounting hole 2316 along the extending direction of the second mounting hole 2316. The second mounting hole 2316 is located on the side of the sliding hole 2314 near the connecting hole 2313. The extending directions of the second mounting hole 2316, the sliding hole 2314, and the connecting hole 2313 are substantially perpendicular to each other. The inner diameter of the end of the second mounting hole 2316 near the connecting hole 2313 is smaller than the outer diameter of the positioning element 2325 to prevent the positioning element 2325 from falling into the connecting hole 2313.

[0094] In some embodiments, such as Figure 5 and Figure 9 As shown, at least one anti-rotation protrusion 2337 can be provided in one of the connector 231 and the expansion plate 233, and at least one anti-rotation groove 2317 can be provided in the other of the connector 231 and the expansion plate 233. When the connecting rod 2331 is inserted into the connecting hole 2313, the anti-rotation protrusion 2337 is used to insert into the anti-rotation groove 2317 to restrict the connecting rod 2331 from rotating within the connecting hole 2313. Thus, when the connecting rod 2331 is inserted into the connecting hole 2313, so that the connector 231 and the expansion plate 233 are detachably connected, the cooperation of the anti-rotation groove 2317 and the anti-rotation protrusion 2337 can prevent the connecting rod 2331 from rotating within the connecting hole 2313, thereby keeping the relative position of the expansion plate 233 and the connector 231 stable.

[0095] It should be noted that an anti-rotation groove 2317 can be provided in the connector 231, and an anti-rotation protrusion 2337 can be provided in the expansion plate 233; or, an anti-rotation protrusion 2337 can be provided in the connector 231, and an anti-rotation groove 2317 can be provided in the expansion plate 233. As long as the anti-rotation protrusion 2337 can be inserted into the anti-rotation groove 2317 when the connecting rod 2331 is inserted into the connecting hole 2313, the connecting rod 2331 can be restricted from rotating within the connecting hole 2313.

[0096] The number of anti-rotation grooves 2317 can be multiple, and these grooves are distributed circumferentially along the connecting hole 2313 or the connecting rod 2331. During the insertion of the connecting rod 2331 into the connecting hole 2313, the connecting rod 2331 can rotate to different angles within the hole, causing the anti-rotation protrusions 2337 to insert into different anti-rotation grooves 2317, thus maintaining the expansion plate 233 at different angles relative to the connector 231.

[0097] Of course, there can also be multiple anti-rotation protrusions 2337, which are distributed circumferentially along the connecting hole 2313 or the connecting rod 2331. During the process of inserting the connecting rod 2331 into the connecting hole 2313, the connecting rod 2331 can be rotated to different angles within the connecting hole 2313, so that different anti-rotation protrusions 2337 are inserted into the anti-rotation grooves 2317, thereby allowing the spreading plate 233 to be maintained at different angles relative to the connector 231.

[0098] Specifically, there are multiple anti-rotation protrusions 2337 and anti-rotation grooves 2317, which are distributed circumferentially along the connecting hole 2313 or the connecting rod 2331. The anti-rotation protrusion 2337 is located on one side of the spreading plate 233 along the direction in which the connecting rod 2331 is inserted into the connecting hole 2313. The anti-rotation groove 2317 is located on the opposite side of the connector 231 along the direction in which the connecting rod 2331 is inserted into the connecting hole 2313. When the connecting rod 2331 is inserted into the connecting hole 2313 and locked by the locking mechanism 232, the anti-rotation protrusion 2337 is inserted into the corresponding anti-rotation groove 2317.

[0099] In some embodiments, such as Figure 8 and Figure 9 As shown, the expansion plate 233 can include a plate body 2333, an anti-rotation part 2336, a locking member 2340, and a connecting rod 2331. The connecting rod 2331 passes through the anti-rotation part 2336 and the plate body 2333 in sequence and is connected to the locking member 2340 to lock the plate body 2333, the anti-rotation part 2336, and the connecting rod 2331. The plate body 2333 is used to insert into and expand the surgical access channel. Therefore, the expansion plate 233 can be processed into multiple parts, making the processing of the expansion plate 233 more convenient.

[0100] Among them, an anti-rotation protrusion 2337 or an anti-rotation groove 2317 can be provided on the side of the anti-rotation part 2336 away from the plate 2333, so that after the connecting rod 2331 is inserted into the connecting hole 2313, the anti-rotation protrusion 2337 or anti-rotation groove 2317 located in the anti-rotation part 2336 cooperates with the anti-rotation groove 2317 or anti-rotation protrusion 2337 of the connector 231 to restrict the rotation of the anti-rotation part 2336 relative to the connector 231.

[0101] A protrusion 2338 is provided on the side of the anti-rotation part 2336 facing the plate 2333, and a groove 2334 is provided on the side of the plate 2333 facing the anti-rotation part 2336. The protrusion 2338 is inserted into the groove 2334 to restrict the relative rotation of the plate 2333 and the anti-rotation part 2336, thereby restricting the rotation of the plate 2333 relative to the connector 231, so that the position of the plate 2333 relative to the connector 231 remains stable.

[0102] Specifically, the anti-rotation part 2336 has a first through hole 2339 through which the connecting rod 2331 passes. The plate 2333 has a second through hole 2335 through which the connecting rod 2331 passes. After the connecting rod 2331 passes through the first through hole 2339 of the anti-rotation part 2336 and the second through hole 2335 of the plate 2333, it is threadedly connected to the locking member 2340, thereby locking the plate 2333, the anti-rotation part 2336, the locking member 2340, and the connecting rod 2331 together. There are multiple protrusions 2338. The multiple protrusions 2338 are distributed sequentially along the circumference of the first through hole 2339. There are also multiple recesses 2334, which are distributed sequentially along the circumference of the second through hole 2335. The multiple protrusions 2338 are inserted into the multiple recesses 2334 one-to-one to restrict the relative rotation of the plate 2333 and the anti-rotation part 2336.

[0103] In some embodiments, such as Figure 1 and Figure 10 As shown, at least one spreading component 20 may include a connector 21, which includes a plug-in portion 214, and the drive component 10 may include a plug-in slot 1121, the plug-in portion 214 being inserted into the plug-in slot 1121 to connect the connector 21 to the drive component 10. This makes the connection between the connector 21 and the drive component 10 more convenient.

[0104] The insertion part 214 may include two opposing outer surfaces 2141, and the insertion groove 1121 may include two opposing inner surfaces 1122. In the direction in which the insertion part 214 is inserted into the insertion groove 1121, the distance between the two outer surfaces 2141 gradually decreases, and the distance between the two inner surfaces 1122 gradually decreases. The included angle formed by the two outer surfaces 2141 is greater than the included angle formed by the two inner surfaces 1122. When the insertion part 214 is inserted into the insertion groove 1121, the two outer surfaces 2141 and the two inner surfaces 1122 abut against each other in a one-to-one correspondence.

[0105] By making the included angle α formed by the two outer surfaces 2141 of the plug part 214 greater than the included angle β formed by the two inner surfaces 1122 in the plug groove 1121, when the plug part 214 is inserted into the plug groove 1121, the two outer surfaces 2141 of the plug part 214 and the two inner surfaces 1122 in the plug groove 1121 can stably abut against each other, making the position of the plug part 214 in the plug groove 1121 more stable, thereby making the connection between the connector 21 and the drive assembly 10 more stable.

[0106] In some embodiments, the difference between the included angle α formed by the two outer surfaces 2141 of the plug portion 214 and the included angle β formed by the two inner surfaces 1122 in the plug groove 1121 can be greater than or equal to 2° and less than or equal to 6°, thereby further improving the stability of the contact between the two outer surfaces 2141 of the plug portion 214 and the two inner surfaces 1122 in the plug groove 1121.

[0107] The difference between the included angle α formed by the two outer surfaces 2141 of the insertion part 214 and the included angle β formed by the two inner surfaces 1122 within the insertion groove 1121 can be 3°, 3.5°, 4.4°, 5°, 5.7°, etc. Specifically, the included angle α formed by the two outer surfaces 2141 of the insertion part 214 can be 29°. The included angle β formed by the two inner surfaces 1122 within the insertion groove 1121 can be 25°. The difference between the included angle α formed by the two outer surfaces 2141 of the insertion part 214 and the included angle β formed by the two inner surfaces 1122 within the insertion groove 1121 can be 4°.

[0108] In some embodiments, such as Figure 11 and Figure 12 As shown, the drive assembly 10 may also be provided with a locking mechanism 113. When the plug part 214 is inserted into the plug slot 1121, the locking mechanism 113 locks the plug part 214 to prevent the plug part 214 from exiting the plug slot 1121, thereby making the connection between the connector 21 and the drive assembly 10 more stable.

[0109] The insertion portion 214 may be provided with a locking portion 2142, and the locking mechanism 113 may include a locking portion 1132. The locking portion 2142 includes a first inclined surface 2143, which is located on the side of the locking portion 2142 along the direction in which the insertion portion 214 exits the insertion groove 1121. The locking portion 1132 is used to abut against the first inclined surface 2143 to lock the insertion portion 214.

[0110] It is understood that by having the first inclined surface 2143 of the locking part 2142 abut against the locking part 1132 on the side where the plug part 214 exits the plug groove 1121, the force exerted by the locking part 1132 on the first inclined surface 2143 of the locking part 2142 has a certain separation in the direction in which the plug part 214 is inserted into the plug groove 1121, thereby effectively restricting the plug part 214 from exiting the plug groove 1121, and making the two outer surfaces 2141 of the plug part 214 stably abut against the two inner surfaces 1122 in the plug groove 1121.

[0111] Alternatively, the locking portion 1132 can include a second inclined surface 1133. The second inclined surface 1133 is located on one side of the locking portion 1132 along the direction in which the insertion portion 214 is inserted into the insertion groove 1121. The second inclined surface 1133 is used to abut against the locking portion 2142 to lock the insertion portion 214. Thus, the force exerted by the second inclined surface 1133 of the locking portion 1132 on the locking portion 2142 has a certain separation in the direction in which the insertion portion 214 is inserted into the insertion groove 1121, thereby effectively restricting the insertion portion 214 from exiting the insertion groove 1121 and ensuring that the two outer surfaces 2141 of the insertion portion 214 stably abut against the two inner surfaces 1122 in the insertion groove 1121.

[0112] It should be noted that the locking part 2142 may include a first inclined surface 2143, and the locking part 1132 may include a second inclined surface 1133. Alternatively, the locking part 2142 may only include the first inclined surface 2143, or the locking part 1132 may only include the second inclined surface 1133.

[0113] Specifically, the locking part 2142 includes a first inclined surface 2143, and the first inclined surface 2143 forms an acute angle with the direction in which the plug part 214 is inserted into the plug groove 1121. The locking part 1132 includes a second inclined surface 1133, and the second inclined surface 1133 forms an acute angle with the direction in which the plug part 214 is inserted into the plug groove 1121.

[0114] The drive assembly 10 includes a connecting base 112, and the locking mechanism 113 includes a button 1131 and an elastic structure 1134. The connecting base 112 has a insertion slot 1121. The button 1131 has a locking part 1132. The button 1131 is movably mounted on the connecting base 112. The elastic structure 1134 is mounted on the connecting base 112. The elastic structure 1134 is used to drive the button 1131 to the locked position (e.g., Figure 12As shown), the button 1131 moves the locking part 1132 to a position where it abuts against the locking part 2142. The locking part 1132 and the locking part 2142 are distributed along the direction in which the plug-in part 214 is inserted into the plug-in slot 1121. The second inclined surface 1133 of the locking part 1132 abuts against the first inclined surface 2143 of the locking part 2142, so that the connector 21 is connected to the connector seat 112 of the drive assembly 10 and the plug-in part 214 is locked.

[0115] Then, by pressing button 1131, button 1131 can be moved from the locking part 1132 to the clearance position, thereby moving the locking part 1132 to the position of clearance locking part 2142, so as to remove the plug part 214 from the plug slot 1121 and separate the connector 21 from the connector seat 112 of the drive assembly 10.

[0116] This application also provides a spreading component. For example... Figure 3 As shown, the spreading assembly 20 includes a connector 21, a spreading member 23, and a driving member 24. The connector 21 is used to connect with the driving assembly 10 of the minimally invasive surgical spreader 1 so that the driving assembly 10 can drive the connector 21 to move. The spreading member 23 is rotatably connected to the connector 21 and can rotate relative to the connector 21 about the rotation axis X1. The spreading member 23 includes a connecting groove 2311 extending along a first direction X, and the first direction X is set at an angle to the rotation axis X1. The driving member 24 is movably connected to the connector 21 and includes a driving part 241 located in the connecting groove 2311.

[0117] The driving member 24 is movable relative to the connecting member 21, so that the driving part 241 rotates relative to the supporting member 23 and moves along the first direction X in the connecting groove 2311, thereby driving the supporting member 23 to rotate around the rotation axis X1.

[0118] In the above embodiments, the descriptions of each embodiment have different focuses. For parts not described in detail in a certain embodiment, please refer to the relevant descriptions in other embodiments.

[0119] The foregoing has provided a detailed description of a dispersing component and a minimally invasive surgical dispersing device provided in the embodiments of this application. Specific examples have been used to illustrate the principles and implementation methods of this application. The descriptions of the above embodiments are only for the purpose of helping to understand the technical solutions and core ideas of this application. Those skilled in the art should understand that modifications can still be made to the technical solutions described in the foregoing embodiments, or equivalent substitutions can be made to some of the technical features. These modifications or substitutions do not cause the essence of the corresponding technical solutions to deviate from the scope of the technical solutions of the embodiments of this application.

Claims

1. A minimally invasive surgical retractor, characterized in that, It includes a driving component and at least two spreading components, the driving component being used to drive at least one of the spreading components to move relative to the other spreading component to adjust the distance between the at least two spreading components; At least one of the spreading components includes: Connector, which is connected to the drive assembly; A support member is rotatably connected to the connecting member. The support member can rotate relative to the connecting member about a rotation axis. The support member includes a connecting groove extending along a first direction, which is set at an angle to the rotation axis. A driving component, movably connected to the connecting component, the driving component including a driving part located within the connecting groove; The driving member is movable relative to the connecting member, so that the driving part rotates and moves relative to the spreading member within the connecting groove and along the first direction, thereby driving the spreading member to rotate about the rotation axis.

2. The minimally invasive surgical retractor as described in claim 1, characterized in that, The connecting groove includes a slot extending along the first direction, the width of which is less than the maximum width of the driving part; and / or, The expansion member further includes a limiting part, which is used to limit the driving part to be located within the connecting groove; And / or, The driving part is spherical, and the outline of the inner circumferential surface of the connecting groove in the cross section perpendicular to the first direction is a superior arc; the distance between the two ends of the superior arc is smaller than the diameter of the driving part.

3. The minimally invasive surgical retractor as described in claim 1, characterized in that, The driving member can drive the driving part to move relative to the connecting member in a second direction, so that the driving part can rotate relative to the spreading member and move in the first direction within the connecting groove. The second direction forms an angle with the first direction, and the first direction and the second direction are respectively substantially perpendicular to the axis of rotation.

4. The minimally invasive surgical retractor as described in claim 3, characterized in that, The driving component is threadedly connected to the connecting component, and the driving component can rotate helically relative to the connecting component to drive the driving part to move along the second direction.

5. The minimally invasive surgical retractor as described in any one of claims 1 to 4, characterized in that, The supporting member includes a supporting plate and a connecting head. The supporting plate and the connecting head are detachably connected. The connecting head can rotate relative to the connecting member about the rotation axis. The connecting groove is formed in the connecting head.

6. The minimally invasive surgical retractor as described in claim 5, characterized in that, One of the connector and the expansion plate is provided with a connecting hole and a locking mechanism, and the other of the connector and the expansion plate is provided with a connecting rod. The connecting rod is used to insert into the connecting hole, and the locking mechanism is used to lock the connecting rod to prevent the connecting rod from exiting the connecting hole. The locking mechanism is also used to unlock the connecting rod so that the connecting rod can exit the connecting hole.

7. The minimally invasive surgical retractor as described in claim 6, characterized in that, The outer circumferential surface of the connecting rod is provided with a positioning groove. When the connecting rod is inserted into the connecting hole, the locking mechanism can be inserted into the positioning groove to lock the connecting rod; the locking mechanism can also be removed from the positioning groove to unlock the connecting rod.

8. The minimally invasive surgical retractor as described in claim 7, characterized in that, The locking mechanism includes an elastic element, a pushing element, and a positioning element. The pushing element is movable relative to the connector between a locked position and an unlocked position. The elastic element is used to drive the pushing element from the unlocked position to the locked position, so that the pushing element pushes the positioning element to insert into the positioning groove. The pusher can also move from the locked position to the unlocked position under the action of external force, so that the positioning member can be pushed out of the positioning groove by the connecting rod.

9. The minimally invasive surgical retractor as described in claim 8, characterized in that, The pusher can slide relative to the connector between the locked position and the unlocked position. The pusher has two abutting parts distributed sequentially along its sliding direction. The connector has a limiting member, which is at least partially located between the two abutting parts. When the pusher slides from the unlock position to the lock position, the limiting member abuts against one of the abutting parts to restrict the pusher from continuing to slide; when the pusher slides from the lock position to the unlock position, the limiting member abuts against the other abutting part to restrict the pusher from continuing to slide.

10. The minimally invasive surgical retractor as described in claim 6, characterized in that, One of the connector and the expansion plate is provided with at least one anti-rotation protrusion, and the other of the connector and the expansion plate is provided with at least one anti-rotation groove. When the connecting rod is inserted into the connecting hole, the anti-rotation protrusion is used to insert into the anti-rotation groove to restrict the connecting rod from rotating in the connecting hole.

11. The minimally invasive surgical retractor as described in claim 10, characterized in that, The expansion plate includes a plate body, an anti-rotation part, a locking member, and the connecting rod. The connecting rod passes through the anti-rotation part and the plate body in sequence and is connected to the locking member to lock the plate body, the anti-rotation part, and the connecting rod. The anti-rotation part is provided with an anti-rotation protrusion or an anti-rotation groove on the side opposite to the plate body. The anti-rotation part has a protrusion on the side facing the plate, and the plate has a groove on the side facing the anti-rotation part. The protrusion is inserted into the groove to restrict the relative rotation of the plate and the anti-rotation part.

12. The minimally invasive surgical retractor as described in any one of claims 1 to 4, characterized in that, At least one of the spreading components includes a connector, the connector including a plug portion, and the drive component including a plug slot, the plug portion being inserted into the plug slot to connect the connector to the drive component; The plug-in portion includes two opposing outer surfaces, and the plug-in groove includes two opposing inner surfaces. In the direction in which the plug-in portion is inserted into the plug-in groove, the distance between the two outer surfaces gradually decreases, and the distance between the two inner surfaces gradually decreases. The included angle formed by the two outer surfaces is greater than the included angle formed by the two inner surfaces. When the plug-in portion is inserted into the plug-in groove, the two outer surfaces and the two inner surfaces abut against each other in a one-to-one correspondence.

13. The minimally invasive surgical retractor as described in claim 12, characterized in that, The difference between the included angle formed by the two outer surfaces and the included angle formed by the two inner surfaces is greater than or equal to 2° and less than or equal to 6°.

14. The minimally invasive surgical retractor as described in claim 12, characterized in that, The drive assembly is further provided with a locking mechanism. When the plug is inserted into the plug slot, the locking mechanism locks the plug to prevent the plug from exiting the plug slot.

15. The minimally invasive surgical retractor as described in claim 14, characterized in that, The insertion part is provided with a locking part, and the locking mechanism includes a locking part; Wherein, the locking part includes a first inclined surface, the first inclined surface being located on the side of the locking part along the direction in which the plug part exits the plug groove, and the locking part being used to abut against the first inclined surface to lock the plug part; and / or, The locking part includes a second inclined surface, which is located on one side of the locking part along the direction in which the plug part is inserted into the plug groove. The second inclined surface is used to abut against the locking part to lock the plug part.

16. A spreading component, characterized in that, include: A connector for connection to a drive assembly of a minimally invasive surgical retractor, such that the drive assembly can drive the connector to move. A support member is rotatably connected to the connecting member. The support member can rotate relative to the connecting member about a rotation axis. The support member includes a connecting groove extending along a first direction, which is set at an angle to the rotation axis. A driving component, movably connected to the connecting component, the driving component including a driving part located within the connecting groove; The driving member is movable relative to the connecting member, so that the driving part rotates and moves relative to the spreading member within the connecting groove and along the first direction, thereby driving the spreading member to rotate about the rotation axis.

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