A minimally invasive surgical forceps

Abstract

The present application provides a kind of minimally invasive surgical forceps, including head structure, handle structure, sleeve structure and locking structure, wherein handle structure is spaced apart from head structure, bending drive member is movably arranged relative to base shell, sleeve structure is connected between head structure and handle structure, locking structure is provided in sleeve structure, including first locking member and second locking member, in first locking member and second locking member, one of them has locking portion, the other of them has locking matching portion;Minimally invasive surgical forceps has the curvature retention state that bending drive member is driven under external force to drive second locking member to move along the direction of approaching first locking member, so that locking portion and locking matching portion are locked;And the swing state that bending drive member is driven to drive second locking member to move along the direction of moving away from first locking member, so that locking portion and locking matching portion are separated, in swing state, the curvature of sleeve structure can change under external force.

Description

TECHNICAL FIELD

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

[0002] Minimally invasive surgery is the most advanced development direction of today's medical science and technology, and has been widely used in clinical practice and achieved satisfactory results due to its small surgical trauma, light postoperative pain, short hospitalization time, good cosmetic effect and other characteristics.

[0003] The prior art discloses a bendable surgical forceps, which comprises a forceps rod, the forceps rod is composed of a fixed rod, a movable rod and a plurality of bending connecting pieces, the bending connecting pieces are arranged between the fixed rod and the movable rod, the bending connecting pieces are triangular structures, two symmetrical angles of the triangular structures are respectively provided with upper and lower steel wire holes, steel wire ropes are arranged in the upper and lower steel wire holes, the plurality of bending connecting pieces are controlled to form a bending structure by pulling the steel wire ropes, so that the bending of the forceps rod is realized.

[0004] However, the above-mentioned bendable surgical forceps lacks fixation between the bending connecting pieces, so that the adjacent two bending connecting pieces are prone to shaking, resulting in unstable bending angle of the forceps rod, which affects the safety of the surgical forceps during use. SUMMARY

[0005] Therefore, the technical problem to be solved by the present application is that the prior art bendable surgical forceps lacks fixation between the bending connecting pieces, so that the adjacent two bending connecting pieces are prone to shaking, resulting in unstable bending angle of the forceps rod, which affects the safety of the surgical forceps during use.

[0006] Therefore, the present application provides a minimally invasive surgical forceps, which comprises:

[0007] a forceps head structure;

[0008] a handle structure, which is arranged in a spaced manner with the forceps head structure and comprises a base shell and a bending driving member mounted on the base shell, the bending driving member being movably arranged relative to the base shell;

[0009] a sleeve structure, which is connected between the forceps head structure and the handle structure and can be bent under the action of external force;

[0010] a locking structure, which is arranged in the sleeve structure and comprises a first locking member and a second locking member, the first locking member being fixed with the sleeve structure, the second locking member being slidably connected with the sleeve structure and connected with the bending driving member, one of the first locking member and the second locking member having a locking portion, and the other having a locking matching portion;

[0011] The micro-invasive surgery forceps have a curvature maintaining state in which the second locking member is driven by the bending driving member to move in a direction close to the first locking member under external force, so that the locking portion is locked with the locking cooperating portion; and a swing state in which the second locking member is driven by the bending driving member to move in a direction away from the first locking member, so that the locking portion is separated from the locking cooperating portion, and in the swing state, the curvature of the sleeve structure can be changed under external force.

[0012] Optionally, the locking member has a plurality of clamping grooves.

[0013] The locking cooperating portion is a plug-in protrusion, and in the curvature maintaining state, the plug-in protrusion is plugged into the clamping groove.

[0014] Optionally, the locking member is a gear, and the locking cooperating portion is adapted to be plugged at a tooth root of the gear.

[0015] Optionally, the sleeve structure comprises:

[0016] A first sleeve, one end of which is connected with the operating handle structure.

[0017] A second sleeve, one end of which is connected with the forceps head structure, and the other end of the second sleeve is hingedly connected with the first sleeve, and the first locking portion and the second locking portion are arranged at the hinged connection position of the first sleeve and the second sleeve to limit mutual bending of the first sleeve and the second sleeve.

[0018] Optionally, the operating handle structure further comprises:

[0019] A driving housing, which is movably arranged relative to the base housing.

[0020] A first gear, which is connected with the driving housing and moves synchronously with the driving housing.

[0021] A second gear, which is engaged with the first gear, and the second gear is connected with the first sleeve and rotates synchronously with the first sleeve.

[0022] The transmission ratio of the first gear to the second gear is less than 1.

[0023] Optionally, the operating handle structure further comprises:

[0024] A third gear, which is engaged in transmission with the first gear.

[0025] A fourth gear, which is coaxially arranged with the third gear and moves synchronously with the third gear, and the fourth gear is engaged in transmission with the second gear.

[0026] Optionally, the operating handle further comprises a dial member movably arranged relative to the base shell;

[0027] The minimally invasive surgical forceps further comprises a connecting assembly connected to the dial member at one end, and connected to the forceps head structure at the other end, and the dial member, the connecting assembly and the forceps head structure move synchronously, the dial member drives the connecting assembly to move under the drive of external force, and in turn drives the forceps head structure to move.

[0028] Optionally, the connecting assembly comprises:

[0029] a first connecting member connected to the dial member at one end, and moving synchronously with the dial member;

[0030] a second connecting member connected to the forceps head structure at one end, and moving synchronously with the forceps head structure;

[0031] a third connecting member connected between the first connecting member and the second connecting member, and the first connecting member, the second connecting member and the third connecting member move synchronously, so that the dial member drives the forceps head structure to move synchronously.

[0032] Optionally, the first connecting member is arranged in the first sleeve, and the first connecting member can slide axially along the first sleeve;

[0033] The second connecting member is arranged in the second sleeve, and the second connecting member can slide axially along the second sleeve;

[0034] The first sleeve is provided with a first notch 311 near one end of the second sleeve;

[0035] The second sleeve is provided with a second notch near one end of the first sleeve, the first notch 311 and the second notch are communicated to form a clearance hole, and the third connecting member is arranged in the clearance hole, so that when the first sleeve bends relative to the second sleeve, the clearance hole provides space for the movement of the third connecting member.

[0036] Optionally, the operating handle further comprises a drive handle movably arranged relative to the base shell, one end of the drive handle is connected to the first connecting member, so that the drive handle rotates relative to the base shell under the drive of external force, drives the first connecting member to move along the axial direction of the first connecting member, to control the forceps head structure to close.

[0037] Optionally, one end of the drive handle is provided with a first gear member;

[0038] The minimally invasive surgical forceps further comprises a second gear member movably arranged relative to the base shell, and the second gear member is engaged with the first gear member.

[0039] The first connecting member is provided with a tooth condition at one end, and is engaged with the second gear member.

[0040] The driving handle is driven to rotate relative to the base shell under an external force, and drives the second gear member to rotate relative to the base shell, so as to drive the first connecting member to move along the axial direction of the first connecting member.

[0041] The technical scheme provided by the present application has the following advantages:

[0042] 1. The present application provides a minimally invasive surgical forceps, comprising a forceps head structure, a handle structure, a sleeve structure and a locking structure, wherein the handle structure is arranged apart from the forceps head structure, comprising a base shell and a bending driving member installed on the base shell, the bending driving member is movably arranged relative to the base shell, the sleeve structure is connected between the forceps head structure and the handle structure, the sleeve structure can be bent under the action of an external force, the locking structure is provided in the sleeve structure, comprising a first locking member and a second locking member, the first locking member is fixed with the sleeve structure, the second locking member is slidably connected with the sleeve structure and connected with the bending driving member, among the first locking member and the second locking member, one of them has a locking part, and the other one has a locking matching part; wherein the minimally invasive surgical forceps has a curvature maintaining state that the bending driving member drives the second locking member to move in the direction close to the first locking member under the action of an external force, so that the locking part is locked with the locking matching part; and a swing state that the bending driving member drives the second locking member to move in the direction away from the first locking member, so that the locking part is separated from the locking matching part, in the swing state, the curvature of the sleeve structure can change under the action of an external force.

[0043] The micro-invasive surgical forceps of the structure is characterized in that the sleeve structure is connected between the forceps head structure and the handle structure, the sleeve structure can be bent under the action of external force to enable the forceps head structure to bend relative to the handle structure, the locking structure is arranged in the sleeve structure, the first locking part of the locking structure is fixed with the sleeve structure, the second locking part is in sliding connection with the sleeve structure and is connected with the bending driving part, and one of the first locking part and the second locking part has a locking part, and the other one has a locking matching part, so that the bending driving part can drive the second locking part to move in the direction close to the first locking part under the action of external force, the locking part is locked with the locking matching part, the sleeve structure is fixed to enable the micro-invasive surgical forceps to have a curvature keeping state, and the second locking part moves away from the first locking part under the action of the bending driving part to enable the locking part to be separated from the locking matching part to be in a swing state, the curvature of the sleeve structure can be changed under the action of external force in the swing state.

[0044] 2. The micro-invasive surgical forceps are characterized in that the handle structure further comprises a driving housing, a first gear and a second gear, wherein the driving housing is movably arranged relative to the base shell; the first gear is connected with the driving housing, and the first gear moves synchronously with the driving housing; the second gear is in mesh with the first gear, the second gear is connected with the first sleeve, and the second gear rotates synchronously with the first sleeve; wherein the transmission ratio of the first gear to the second gear is less than 1.

[0045] The micro-invasive surgical forceps of the structure are characterized in that the first gear is fixedly connected with the driving housing, the first gear can be driven to rotate synchronously by rotating the driving housing, the second gear is in mesh with the first gear, and the transmission ratio of the first gear to the second gear is less than 1, so that the rotating speed of the second gear is greater than that of the first gear, the second gear is connected with the first sleeve, and the second gear rotates synchronously with the first sleeve, so that the user only needs to rotate the driving housing by a small angle, for example, 30 degrees or 40 degrees, the driving housing can drive the first sleeve to rotate through the first gear and the second gear, and the rotating angle is amplified through the first gear and the second gear, so that the first sleeve can rotate by a large angle, for example, 60 degrees or 80 degrees, thereby avoiding that the user forces the handle structure to deflect, causing wrist fatigue, and further affecting the quality of the operation.

[0046] 3. The minimally invasive surgical forceps, the handle structure further comprises a dial member, the dial member is movably arranged relative to the base shell; the minimally invasive surgical forceps further comprises a connecting assembly, one end of the connecting assembly is connected with the dial member, the other end of the connecting assembly is connected with the forceps head structure, and the dial member, the connecting assembly and the forceps head structure move synchronously, the dial member drives the connecting assembly to move under the driving of external force, and then drives the forceps head structure to move.

[0047] The minimally invasive surgical forceps of the structure, by arranging the dial member and the connecting assembly, connecting the dial member and the forceps head structure through the connecting assembly, and the dial member, the connecting assembly and the forceps head structure can move synchronously, so that the user can control the rotation of the forceps head structure by operating the dial member at the operating end. BRIEF DESCRIPTION OF DRAWINGS

[0048] In order to more clearly illustrate the specific embodiments of the present application or the technical solutions in the prior art, the drawings needed in the specific embodiments or the prior art description will be briefly introduced below. Obviously, the drawings in the following description are some embodiments of the present application, and those skilled in the art can also obtain other drawings according to these drawings without creative labor.

[0049] Figure 1 The perspective view of the minimally invasive surgical forceps provided in the embodiments of the present application;

[0050] Figure 2 The internal structure schematic view of the minimally invasive surgical forceps provided in the embodiments of the present application;

[0051] Figure 3 The structure schematic view of the driving shell, the first gear, the second gear, the third gear and the fourth gear in the minimally invasive surgical forceps provided in the embodiments of the present application;

[0052] Figure 4 The structure schematic view of the sleeve assembly and the forceps head structure in the minimally invasive surgical forceps provided in the embodiments of the present application;

[0053] Figure 5 The structure schematic view of the first locking member and the second locking member in the minimally invasive surgical forceps provided in the embodiments of the present application; Figure 4 The structure enlarged view of the circle A in the figure;

[0054] Figure 6 The structure schematic view of the first locking member and the second locking member in the minimally invasive surgical forceps provided in the embodiments of the present application;

[0055] Figure 7 The structure enlarged view of the circle B in the figure; Figure 6 The structure enlarged view of the circle B in the figure;

[0056] Figure 8Structure diagram of the bending driving member, the driving housing and the first locking member in the minimally invasive surgical forceps provided in the embodiments of the present application;

[0057] Figure 9 Exploded view of the bending driving member, the intermediate member, the clamping member and the first locking member in the minimally invasive surgical forceps provided in the embodiments of the present application;

[0058] Figure 10 Structure diagram of the first connecting member, the second connecting member, the third connecting member and the dial member in the minimally invasive surgical forceps provided in the embodiments of the present application;

[0059] Explanation of reference numerals:

[0060] 1 - structure of the forceps head; 11 - first forceps head; 12 - second forceps head; 13 - support column;

[0061] 2 - structure of the handle; 21 - base shell; 221 - bending driving member; 222 - intermediate member; 223 - clamping member; 23 - driving housing; 24 - first gear; 25 - second gear; 26 - third gear; 27 - fourth gear; 28 - dial member; 29 - driving handle; 291 - first gear member; 292 - second gear member;

[0062] 3 - structure of the sleeve; 31 - first sleeve; 311 - first notch; 32 - second sleeve; 321 - second notch;

[0063] 41 - first locking member; 411 - locking part; 42 - second locking member; 421 - locking matching part;

[0064] 51 - first connecting member; 511 - tooth condition; 52 - second connecting member; 53 - third connecting member;

[0065] 6 - bearing member. DETAILED DESCRIPTION

[0066] The technical solutions of the present application will be described clearly and completely below in conjunction with the drawings. Obviously, the described embodiments are part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all the other embodiments obtained by those skilled in the art without creative labor fall within the protection scope of the present application.

[0067] In the description of this invention, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating orientations or positional relationships based on the orientations or positional relationships shown in the accompanying drawings, are only for the convenience of describing the invention 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 the invention. Furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and should not be construed as indicating or implying relative importance. In addition, the technical features involved in the different embodiments of the invention described below can be combined with each other as long as they do not conflict with each other.

[0068] Example

[0069] This embodiment provides a minimally invasive surgical forceps, such as Figures 1 to 10 As shown, it includes a clamp head structure 1, a handle mechanism 2, and a sleeve structure 3; wherein, the handle mechanism 2 is spaced apart from the clamp head structure 1, and the sleeve structure 3 is connected between the clamp head structure 1 and the handle mechanism 2, and the sleeve structure 3 can be bent under the action of external force.

[0070] like Figure 2 and Figure 3 As shown, the handle mechanism 2 includes a base shell 21, a drive housing 23, a first gear 24, a second gear 25, a third gear 26, and a fourth gear 27. The sleeve structure 3 includes a first sleeve 31 and a second sleeve 32. The drive housing 23 is connected to the base shell 21 via a bearing 6 and can rotate relative to the base shell 21. One end of the drive housing 23 is fixedly connected to the first gear 24 so that the drive housing 23 rotates synchronously with the first gear 24. The third gear 26 meshes with the first gear 24. The fourth gear 27 is coaxially arranged with the third gear 26 and meshes with the second gear 25. The first gear 24 transmits power to the second gear 25. The ratio is less than 1, and the second gear 25 is fixedly connected to the first sleeve 31 so that the second gear 25 and the first sleeve 31 rotate synchronously. This allows the user to rotate the drive housing 23 by only a small angle, such as 30 degrees, and the drive housing 23 can drive the first sleeve 31 to rotate through the first gear 24, the second gear 25, the third gear 26 and the fourth gear 27. The rotation angle is amplified by the first gear 24 and the second gear 25, so that the first sleeve 31 can rotate by a large angle, such as 60 degrees. This avoids the user having to forcefully turn the handle mechanism 2, causing wrist fatigue and affecting the quality of the surgery.

[0071] like Figure 3 and Figure 4 As shown, one end of the second sleeve 32 is connected to the pliers head structure 1, and the other end of the second sleeve 32 is hinged to the first sleeve 31, so that the first sleeve 31 and the second sleeve 32 can be bent at the hinge.

[0072] As shown in Figure 5 and 6 , the locking structure includes a first locking piece 41 and a second locking piece 42, the first locking piece 41 is fixedly connected with the second sleeve 32 in the sleeve structure 3, and the second locking piece 42 is slidingly connected with the first sleeve 31 in the sleeve structure 3, as shown in Figure 8 and Figure 9 , the handle structure 2 further includes a bending driving piece 221, an intermediate piece 222 and a clamping piece 223, the second locking piece 42 is provided with a clamping groove and the clamping piece 223 is clamped, one end of the intermediate piece 222 is hinged with the clamping piece 223, the other end of the intermediate piece 222 is hinged with the bending driving piece 221, and as shown in Figure 8 , the bending driving piece 221 is hinged with the driving shell 23 at the Q point, so that by pulling the bending driving piece 221, the second locking piece 42 can be driven to move along its axial direction.

[0073] As shown in Figure 6 and Figure 7 , the first locking piece 41 is provided with a locking portion 411, wherein the locking portion 411 has a plurality of clamping grooves, for example, the locking portion 411 is a gear, and the clamping groove is the gap between the straight teeth on the gear. The first locking piece 41 is provided with a locking matching portion 421, wherein the locking matching portion 421 is a plug-in protrusion, which is used for plugging inside the clamping groove.

[0074] As shown in Figure 7 and Figure 8 , when the bending driving piece 221 rotates clockwise around the Q point on the driving shell 23 under the action of external force, it drives the second locking piece 42 to move away from the first locking piece 41, so that when the locking portion 411 and the locking matching portion 421 are separated, the first sleeve 31 and the second sleeve 32 can move at the hinge to adjust the bending angle of the first sleeve 31 and the second sleeve 32, that is, the curvature of the sleeve structure 3 can change under the action of external force, so that the minimally invasive surgical forceps is in a swing state.

[0075] When the bending driving piece 221 rotates counterclockwise around the Q point on the driving shell 23 under the action of external force, it drives the second locking piece 42 to move close to the first locking piece 41, so that the clamping groove on the locking portion 411 and the locking matching portion 421 are plugged, so that when the first sleeve 31 and the second sleeve 32 are bent at the hinge, the first sleeve 31 and the second sleeve 32 are fixed by the plugging of the locking portion 411 and the locking matching portion 421, so that the first sleeve 31 and the second sleeve 32 can be stably bent, so that the minimally invasive surgical forceps is in a curvature maintaining state.

[0076] In some other embodiments, a resilient member is arranged between the bending driving member 221 and the driving housing 23. When the bending driving member 221 is driven to rotate clockwise around the Q point on the driving housing 23 by an external force, the resilient member is elastically deformed. After the external force is lost, the bending driving member 221 rotates counterclockwise around the Q point on the driving housing 23 under the elastic force of the resilient member.

[0077] In some other embodiments, the locking portion 411 can also be arranged on the second locking member 42, and the locking matching portion 421 is arranged on the first locking member 41.

[0078] As shown in Figure 10 , the minimally invasive surgical forceps further comprises a connecting assembly, which comprises a first connecting member 51, a second connecting member 52 and a third connecting member 53. The first connecting member 51 is connected to the dial member 28 at one end and moves synchronously with the dial member 28. For example, a square hole is formed in the middle of the dial member 28, and the first connecting member 51 is provided with a square surface near the dial member 28 to cooperate with the square hole. The second connecting member 52 is connected to the forceps head structure 1 at one end and moves synchronously with the forceps head structure 1. The third connecting member 53 is connected between the first connecting member 51 and the second connecting member 52, and the first connecting member 51, the second connecting member 52 and the third connecting member 53 move synchronously, so that the user can control the forceps head structure 1 to rotate around the axis of the forceps head structure 1 by operating the dial member 28, so as to align the forceps head structure 1 with the tissue organ and pull, clamp or sample the tissue.

[0079] As shown in Figure 5 and Figure 6 , the first connecting member 51 is arranged in the first sleeve 31 and can slide axially along the first sleeve 31. The second connecting member 52 is arranged in the second sleeve 32 and can slide axially along the second sleeve 32. As shown in Figure 2 , the first sleeve 31 is provided with a first notch 311 near one end of the second sleeve 32, and the second sleeve 32 is provided with a second notch 321 near one end of the first sleeve 31. The first notch 311 and the second notch 321 are communicated to form a clearance hole, and the third connecting member 53 is arranged in the clearance hole to provide space for the movement of the third connecting member 53 when the first sleeve 31 bends relative to the second sleeve 32.

[0080] The first connecting member 51, the second connecting member 52 and the third connecting member 53 are connected through a universal joint, so that the first connecting member 51, the second connecting member 52 and the third connecting member 53 can bend relative to each other, and the first connecting member 51, the second connecting member 52 and the third connecting member 53 can rotate synchronously.

[0081] As shown in Figure 2 and Figure 10As shown, the handle structure 2 further comprises a driving handle 29, which is movably arranged relative to the base shell 21, as shown Figure 5 and Figure 8 As shown, the first connecting member 51 is arranged inside the second locking member 42, which is arranged inside the first sleeve 31, and the first connecting member 51 is provided with a tooth condition 511 at one end close to the driving handle 29, and the first connecting member 51 is provided with a groove at one end, and the tooth condition 511 is provided with a limiting block at one end, which is rotatably arranged in the groove, so that when the tooth condition 511 drives the first connecting member 51 to move along the axial direction of the first connecting member 51, it can also rotate relative to the first connecting member 51. One end of the driving handle 29 is provided with a first gear member 291, and the minimally invasive surgical forceps further comprises a second gear member 292, which is movably arranged relative to the base shell 21, one end of the second gear member 292 is engaged with the first gear member 291, and the other end of the second gear member 292 is engaged with the tooth condition 511. When the driving handle 29 is pressed to rotate relative to the base shell 21, the first gear member 291 on the driving handle 29 rotates to drive the second gear member 292 to rotate relative to the base shell 21, and then drives the tooth condition 511 to move through the second gear member 292, and then drives the first connecting member 51 to move along its axial direction.

[0082] As shown Figure 6 and Figure 10 The jaw structure 1 comprises a first jaw 11, a second jaw 12 and a support column 13, the first jaw 11 and the second jaw 12 are hinged with the support column 13, and the first jaw 11 and the second jaw 12 are connected with the second connecting member 52 at one end close to the handle structure 2, and the closing and opening of the first jaw 11 and the second jaw 12 can be controlled by pulling the second connecting member 52, as shown Figure 2 As shown, by pressing the driving handle 29 to rotate counterclockwise around the hinge with the base shell 21, the first connecting member 51 is driven to move away from the jaw structure 1 through the first gear member 291, the second gear member 292 and the tooth condition 511, and then the second connecting member 52 is driven to move away from the jaw structure 1, so as to control the first jaw 11 and the second jaw 12 to close, and vice versa. By pressing the driving handle 29 to rotate clockwise around the hinge with the base shell 21, the first jaw 11 and the second jaw 12 are controlled to open.

[0083] The minimally invasive surgical forceps of the present embodiment, when working, comprises the following steps:

[0084] (1) As shown Figure 8As shown, the bending driving member 221 is rotated clockwise around the Q point on the driving housing 23, which drives the second locking member 42 to move away from the first locking member 41, so that the locking portion 411 is separated from the locking matching portion 421, and then the first sleeve 31 and the second sleeve 32 are bent. Subsequently, the bending driving member 221 is rotated counterclockwise around the Q point on the driving housing 23, which drives the second locking member 42 to move towards the first locking member 41, so that the clamping slot on the locking portion 411 is inserted into the locking matching portion 421, and then the first sleeve 31 and the second sleeve 32 are kept fixed.

[0085] (2) The driving housing 23 is rotated, which drives the first sleeve 31 to rotate, and the first sleeve 31 drives the second sleeve 32 and the jaw structure 1 to rotate around the first sleeve 31.

[0086] (3) The dial member 28 is rotated, which drives the jaw structure 1 to rotate around the axis of the jaw structure 1 through the connecting assembly.

[0087] (4) The driving handle 29 is pressed, which controls the opening and closing of the jaw structure 1.

[0088] It can be understood that the above steps can be adjusted according to the actual operation.

[0089] Obviously, the above embodiments are only examples for clearly illustrating but not limiting the embodiments. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be exhausted. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A minimally invasive surgical forceps, characterized by, The micro-invasive surgical forceps comprises: a forceps head structure; a handle structure, which is arranged in a spaced manner with the forceps head structure, comprises a base shell and a bending driving member mounted on the base shell, and the bending driving member is movably arranged relative to the base shell; a sleeve structure, which is connected between the forceps head structure and the handle structure, and the sleeve structure is bendable under external force; a locking structure, which is arranged in the sleeve structure, comprises a first locking member and a second locking member, the first locking member is fixed with the sleeve structure, the second locking member is slidably connected with the sleeve structure and connected with the bending driving member, and in the first locking member and the second locking member, one of them has a locking part, and the other one has a locking matching part; wherein, the micro-invasive surgical forceps has a curvature maintaining state in which the bending driving member drives the second locking member to move in a direction close to the first locking member under external force, so that the locking part is locked with the locking matching part; and a swing state in which the bending driving member drives the second locking member to move in a direction away from the first locking member, so that the locking part is separated from the locking matching part, and in the swing state, the curvature of the sleeve structure can be changed under external force; the locking member has a plurality of clamping grooves; the locking matching part is a plug-in protrusion, and in the curvature maintaining state, the plug-in protrusion is plugged into the clamping groove; the locking member is a gear, and the locking matching part is adapted to be plugged at the tooth root of the gear.

2. The minimally invasive surgical forceps according to claim 1, wherein, The sleeve structure comprises: a first sleeve, one end of which is connected with the handle structure; a second sleeve, one end of which is connected with the forceps head structure, and the other end of the second sleeve is hingedly connected with the first sleeve, and the first locking part and the second locking part are arranged at the hinged connection of the first sleeve and the second sleeve to limit the mutual bending of the first sleeve and the second sleeve.

3. The minimally invasive surgical forceps according to claim 2, wherein, The handle structure further comprises: a driving shell, which is movably arranged relative to the base shell; a first gear, which is connected with the driving shell and synchronously moves with the driving shell; a second gear, which is meshed with the first gear, connected with the first sleeve and synchronously rotates with the first sleeve; wherein, the transmission ratio of the first gear to the second gear is less than 1.

4. The minimally invasive surgical forceps according to claim 3, wherein, The handle structure further comprises: a third gear, which is meshed and driven with the first gear; a fourth gear, which is coaxially arranged with the third gear and synchronously moves with the third gear, and the fourth gear is meshed and driven with the second gear.

5. The micro-invasive surgical forceps according to claim 2, wherein the handle structure further comprises a dial member, which is movably arranged relative to the base shell; the micro-invasive surgical forceps further comprises a connecting assembly, one end of which is connected with the dial member, and the other end of the connecting assembly is connected with the forceps head structure, and the dial member, the connecting assembly and the forceps head structure synchronously move, and under external force, the dial member drives the connecting assembly to move, and then drives the forceps head structure to move.

6. The minimally invasive surgical forceps according to claim 5, wherein, the connecting assembly comprises: The first connecting member is connected with the dial member at one end, and moves synchronously with the dial member; The second connecting member is connected with the jaw structure at one end, and moves synchronously with the jaw structure; The third connecting member is connected between the first connecting member and the second connecting member, and the first connecting member, the second connecting member and the third connecting member move synchronously to drive the dial member to drive the jaw structure to move synchronously.

7. The minimally invasive surgical forceps according to claim 6, wherein: The first connecting member is arranged in the first sleeve and can slide axially along the first sleeve; The second connecting member is arranged in the second sleeve and can slide axially along the second sleeve; The first sleeve is provided with a first notch near one end of the second sleeve; The second sleeve is provided with a second notch near one end of the first sleeve, the first notch and the second notch are communicated to form a clearance hole, and the third connecting member is arranged in the clearance hole, so that when the first sleeve is bent relative to the second sleeve, the clearance hole provides space for movement of the third connecting member.

8. The minimally invasive surgical forceps according to claim 6, wherein, The handle structure further comprises a driving handle, which is movably arranged relative to the base shell, one end of the driving handle is connected with the first connecting member, so that the driving handle is driven to rotate relative to the base shell under external force, and drives the first connecting member to move along the axial direction of the first connecting member to control the closure of the jaw structure.

9. The minimally invasive surgical forceps according to claim 8, wherein: One end of the driving handle is provided with a first gear member; The minimally invasive surgical forceps further comprise a second gear member, which is movably arranged relative to the base shell, and the second gear member is engaged with the first gear member; One end of the first connecting member is provided with a tooth condition, which is engaged with the second gear member; The driving handle is driven to rotate relative to the base shell under external force, which drives the second gear member to rotate relative to the base shell, thereby driving the first connecting member to move along the axial direction of the first connecting member.

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