Wire cutting instrument

Abstract

The present invention relates to a thread cutting instrument. The thread cutting instrument includes: a first tube body, an installation plate is provided at the distal end of the first tube body; a plurality of thread cutting parts, which are respectively connected to the installation plate, and the plurality of thread cutting parts are arranged in sequence along the circumferential direction of the first tube body; a plurality of first transmission parts, the plurality of first transmission parts are correspondingly connected to the plurality of thread cutting parts; and a second tube body, the second tube body is rotationally connected to the first tube body, and the plurality of first transmission parts are respectively connected to the second tube body; when the second tube body rotates relative to the first tube body, it drives the plurality of first transmission parts to move respectively, and the first transmission parts drive the corresponding thread cutting parts to move, so that the plurality of thread cutting parts gather towards the center of the first tube body or disperse outward from the center of the first tube body. This thread cutting instrument is easy to cut surgical sutures.

Description

Technical Field

[0001] The present invention relates to the technical field of wire-cutting instruments, and particularly to a wire-cutting instrument. Background Art

[0002] In endoscopic surgery, since the distance between the operation position of the doctor and the target position in the patient's body is relatively far, it is necessary to use a catheter to transport a wire-cutting instrument to the target position in the patient's body to cut the surgical suture.

[0003] The current wire-cutting instrument includes a threading structure and a wire-cutting structure. When using the current wire-cutting instrument to cut a wire in endoscopic surgery, it is necessary to thread the surgical suture through the threading structure to position the surgical suture, and then use the wire-cutting structure to cut the surgical suture.

[0004] However, when using the current wire-cutting instrument to cut a wire in endoscopic surgery, when threading the surgical suture through the threading structure, the threading is difficult and the threading failure rate is high, which easily causes the problem that the wire-cutting structure cannot cut the wire, thereby affecting the surgical process and increasing the surgical risk. Summary of the Invention

[0005] Based on this, in view of the problem that when using the current wire-cutting instrument to cut a wire in endoscopic surgery, it is easy to cause the problem that the wire-cutting structure cannot cut the wire, it is necessary to provide a wire-cutting instrument that is easy to cut the surgical suture.

[0006] An embodiment of the present application provides a wire-cutting instrument, which includes:

[0007] A first tube body, and a mounting plate is provided at the distal end of the first tube body;

[0008] A plurality of wire-cutting parts, which are respectively connected to the mounting plate, and the plurality of wire-cutting parts are arranged in sequence along the circumferential direction of the first tube body;

[0009] A plurality of first transmission parts, which are correspondingly connected to the plurality of wire-cutting parts; and

[0010] A second tube body, which is rotatably connected to the first tube body, and the plurality of first transmission parts are respectively connected to the second tube body; when the second tube body rotates relative to the first tube body, it drives the plurality of first transmission parts to move respectively, and the first transmission part drives the corresponding wire-cutting part to move, so that the plurality of wire-cutting parts gather towards the center of the first tube body or disperse outward from the center of the first tube body.

[0011] The above-mentioned wire-cutting instrument drives multiple first transmission members to move respectively by rotating the second tube body. The first transmission member drives the corresponding wire-cutting part to move, so that multiple wire-cutting parts disperse outward from the center of the first tube body, thereby enlarging the first wire-passing space, making it easy for the surgical suture to pass through the first wire-passing space, and having a high wire-passing success rate. Furthermore, by rotating the second tube body to drive multiple first transmission members to move respectively, the first transmission member drives the corresponding wire-cutting part to move. When multiple wire-cutting parts gather towards the center of the first tube body, it is easy to cut the surgical suture, which is conducive to accelerating the surgical process and reducing the surgical risk.

[0012] In one embodiment, multiple wire-cutting parts are respectively rotatably connected to the mounting plate, and the first transmission member is used to drive the corresponding wire-cutting part to rotate relative to the mounting plate.

[0013] In one embodiment, the mounting plate is provided with multiple first sliding grooves corresponding to the multiple first transmission members. The first transmission member and the corresponding first sliding groove are slidably matched along a first preset direction, so that when the second tube body rotates relative to the first tube body, it drives the first transmission member to slide along the corresponding first sliding groove.

[0014] In one embodiment, the first transmission member is rotatably connected to the corresponding wire-cutting part, so that when the first transmission member slides along the corresponding first sliding groove, it drives the corresponding wire-cutting part to rotate relative to the mounting plate.

[0015] In one embodiment, a first end plate is provided at the distal end of the second tube body. The first end plate is provided with multiple second sliding grooves corresponding to the multiple first transmission members. The first transmission member and the corresponding second sliding groove are slidably matched along a second preset direction; when the second tube body rotates relative to the first tube body, through the sliding match between the first transmission member and the corresponding first sliding groove, it drives the first transmission member to move along the corresponding second sliding groove.

[0016] In one embodiment, the wire-cutting instrument further includes:

[0017] Multiple clamping parts, which are respectively connected to the mounting plate. The multiple clamping parts are located on one side of the multiple wire-cutting parts close to the proximal end of the first tube body, and the multiple clamping parts are arranged in sequence along the circumferential direction of the first tube body; and

[0018] Multiple second transmission members, which are correspondingly connected to the multiple clamping parts. The second transmission member is used to drive the corresponding clamping part to move, so that the multiple clamping parts gather towards the center of the first tube body or disperse outward from the center of the first tube body.

[0019] In one embodiment, the multiple second transmission members are correspondingly connected to the multiple first transmission members, so that the first transmission member can drive the corresponding second transmission member to move.

[0020] In one embodiment, the mounting plate is provided with a plurality of limiting structures, the limiting structures correspond to the second transmission members one by one, and the second transmission members correspond to the first transmission members one by one; during the process that the plurality of wire cutting parts converge towards the center of the first tube body, the first transmission member has a continuous first movement stroke and second movement stroke; when the first transmission member moves in the first movement stroke, it can drive the corresponding second transmission member to move together, so that the second transmission member drives the corresponding clamping part to move; when the first transmission member is at the critical point between the first movement stroke and the second movement stroke, the corresponding limiting structure blocks the corresponding second transmission member from moving along the second movement stroke.

[0021] In one embodiment, the mounting plate is provided with a plurality of limiting structures, the plurality of limiting structures correspond to the plurality of second transmission members, and the first transmission member has a continuous first movement stroke and second movement stroke; the limiting structure is used to block the corresponding second transmission member from moving along the second movement stroke.

[0022] In one embodiment, the wire cutting instrument further includes a plurality of elastic members corresponding to the plurality of second transmission members, and the second transmission member is movably connected to the corresponding first transmission member through the corresponding elastic member; when the first transmission member moves in the first movement stroke, it drives the corresponding second transmission member to move together through the corresponding elastic member; when the first transmission member is at the critical point between the first movement stroke and the second movement stroke, the first transmission member can move along the second movement stroke through the elastic deformation of the elastic member.

[0023] In one embodiment, the mounting plate is provided with a plurality of first chutes corresponding to the plurality of first transmission members, the first transmission member is slidably engaged with the corresponding first chute, and the first chute includes a first part corresponding to the first movement stroke and a second part corresponding to the second movement stroke;

[0024] The mounting plate is provided with a plurality of limiting chutes corresponding to the plurality of second transmission members, and the second transmission member is slidably engaged with the limiting chutes; the position of the limiting chutes corresponds to the position of the first part of the first chute, and the extending direction of the limiting chutes is parallel to the extending direction of the first part of the first chute.

[0025] In one embodiment, the first chute is axially communicated with the limiting chute.

[0026] In one embodiment, the plurality of clamping parts are respectively rotatably connected to the mounting plate, and the second transmission member is rotatably connected to the corresponding clamping part, so that when the second transmission member moves, it drives the corresponding clamping part to rotate relative to the mounting plate.

[0027] In one embodiment, a clamping mark is provided on the outer peripheral surface of the first tube body, the second tube body is sleeved on the first tube body and is threadedly connected to the first tube body, and when the position of the second tube body corresponds to the clamping mark, the first transmission member is at the critical point between the first movement stroke and the second movement stroke.

[0028] In one embodiment, a shear mark is provided on the outer circumference of the first tube body, the second tube body is sleeved on the first tube body and threadedly connected to the first tube body, and when the position of the second tube body corresponds to the shear mark, the first transmission member is at one end of the second movement stroke away from the first movement stroke.

[0029] In one embodiment, a plurality of clamping parts are respectively rotatably connected to the mounting plate, and the second transmission member is used to drive the corresponding clamping parts to rotate relative to the mounting plate.

[0030] In one embodiment, the wire cutting device also includes a third tube body, which is rotatably connected to the first tube body. When the third tube body rotates relative to the first tube body, it drives multiple second transmission members to move separately, and the second transmission members drive corresponding clamping parts to move, so that the multiple clamping parts gather toward the center of the first tube body or disperse outward from the center of the first tube body.

[0031] In one embodiment, the mounting plate is provided with a plurality of third sliding grooves corresponding to the plurality of second transmission members, and the second transmission members slide and cooperate with the corresponding third sliding grooves along a third preset direction, so that when the third tube body rotates relative to the first tube body, the second transmission member is driven to slide along the corresponding third sliding groove.

[0032] In one embodiment, the second transmission member is rotatably connected to the corresponding clamping portion, so that when the second transmission member slides along the corresponding third sliding groove, the corresponding clamping portion is driven to rotate relative to the mounting plate.

[0033] In one embodiment, a second end plate is provided at the distal end of the third tube body, and the second end plate is provided with a plurality of fourth sliding grooves corresponding to the plurality of second transmission members, and the second transmission member and the corresponding fourth sliding grooves slide in cooperation with each other along a fourth preset direction; when the third tube body rotates relative to the first tube body, the second transmission member is driven to move along the corresponding fourth sliding groove through the sliding cooperation between the second transmission member and the corresponding third sliding groove.

[0034] In one embodiment, the mounting plate is detachably connected to the first tube.

[0035] In one embodiment, the mounting plate is provided with a plurality of ears arranged at intervals along the circumference of the first tube body, and the ears protrude from the mounting plate along the radial direction of the first tube body;

[0036] The distal end of the first tube body is provided with a plurality of mounting grooves corresponding to the plurality of supporting ears, and the mounting grooves are matched with the corresponding supporting ears;

[0037] The groove wall of the mounting groove is provided with an elastic blocking member, which has a blocking state capable of blocking the support ear from moving out of the mounting groove, and an avoidance state capable of allowing the support ear to move out of the mounting groove. The elastic blocking member can switch between the blocking state and the avoidance state through its own elastic deformation.

[0038] In one embodiment, the installation groove includes a first groove and a second groove communicating with the first groove. The extending direction of the first groove is along the axial direction of the first tube body, and the extending direction of the second groove is along the circumferential direction of the first tube body. The second groove is located at the proximal end of the first groove. The elastic blocking member is located at the communication portion between the first groove and the second groove. The communication portion between the first groove and the second groove has a first groove wall facing the distal end of the first tube body, and the elastic blocking member is disposed on the first groove wall.

[0039] In one embodiment, one end of the wire cutting portion facing radially inward along the first tube body has a wire cutting edge; and / or,

[0040] The two sides of the wire cutting portion facing away from each other along the circumferential direction of the first tube body respectively have a first surface and a second surface, and the first surface and the second surface respectively have a wire cutting edge.

[0041] In one embodiment, the two sides of the wire cutting portion facing away from each other along the circumferential direction of the first tube body respectively have a first surface and a second surface. The first surface is a concave surface, and the second surface is a convex surface. Among two adjacent wire cutting portions, the first surface of one wire cutting portion cooperates with the concave surface of the other wire cutting portion. Description of the Drawings

[0042] Figure 1 is a schematic structural diagram of a wire cutting instrument according to an embodiment;

[0043] Figure 2 is Figure 1 a partial enlarged view of area A in

[0044] Figure 3 is Figure 1 a schematic connection diagram of the first tube body, the mounting plate and the wire cutting portion of the wire cutting instrument in

[0045] Figure 4 is Figure 3 a partial enlarged view of area B in

[0046] Figures 5(a) to 5(c) is a diagram showing the change in the connection relationship of the mounting plate, the wire cutting portion and the first transmission member during the movement of the first transmission member;

[0047] Figure 6 is Figure 1 a distal view of the mounting plate of the wire cutting instrument in

[0048] Figure 7 is Figure 1 a schematic connection diagram of the first transmission member, the second transmission member and the elastic member of the wire cutting instrument in

[0049] Figures 8(a) to 8(c) is a diagram showing the change in the connection relationship of the mounting plate, the clamping portion and the second transmission member during the movement of the first transmission member;

[0050] Figure 9For Figure 1 Proximal view of the mounting plate of the wire cutting instrument;

[0051] Figure 10 For Figure 1 Schematic structural view of the first tube body of the wire cutting instrument;

[0052] Figure 11 For Figure 10 Local enlarged view of area B in

[0053] Figure 12(a) is Figure 1 Schematic structural view of the wire cutting part of the wire cutting instrument;

[0054] Figure 12(b) is Figure 1 Schematic structural view of the clamping part of the wire cutting instrument.

[0055] Explanation of the reference numerals in the drawings:

[0056] Wire cutting instrument 100;

[0057] First tube body 110; mounting groove 111; first groove 1111; second groove 1112; first groove wall 111a; elastic blocking member 1113; clamping mark 112; cutting mark 113;

[0058] Wire cutting part 120; first wire threading space 101; first rotating shaft 121; first surface 122; second surface 123;

[0059] Mounting plate 130; first sliding groove 131; limiting structure 132; support ear 133; first avoidance hole 102;

[0060] First transmission member 140; first transmission rod 141; first connecting rod 142; first connecting shaft 143; first shaft hole 103;

[0061] Second tube body 150; first end plate 151; second sliding groove 152; second avoidance hole 106;

[0062] Clamping part 160; second wire threading space 104; second rotating shaft 161; third surface 162; fourth surface 163;

[0063] Second transmission member 170; second transmission rod 171; second connecting rod 172; second connecting shaft 173; sleeve 174; second shaft hole 105;

[0064] Elastic member 180. Detailed implementation manners

[0065] In order to make the above objects, features, and advantages of the present invention more apparent and understandable, the following will describe in detail the specific embodiments of the present invention with reference to the accompanying drawings. Many specific details are set forth in the following description to facilitate a thorough understanding of the present invention. However, the present invention can be implemented in many other ways different from those described herein, and those skilled in the art can make similar improvements without departing from the spirit of the present invention. Therefore, the present invention is not limited by the specific embodiments disclosed below.

[0066] In the description of the present invention, 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", "counterclockwise", "axial", "radial", "circumferential", etc. indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings. These are only for the convenience of describing the present invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and thus should not be construed as a limitation of the present invention.

[0067] In addition, the terms "first" and "second" are only used for descriptive purposes and cannot be construed as indicating or implying relative importance or implicitly specifying the quantity of the indicated technical features. Thus, features defined with "first" and "second" may explicitly or implicitly include at least one of such features. In the description of the present invention, the meaning of "a plurality" is at least two, such as two, three, etc., unless otherwise specifically defined.

[0068] In the present invention, unless otherwise clearly defined and limited, the terms "mounted", "connected", "coupled", "fixed", etc. should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the internal communication of two elements or the interaction relationship between two elements, unless otherwise clearly limited. For those of ordinary skill in the art, the specific meanings of the above terms in the present invention can be understood according to specific circumstances.

[0069] In the present invention, unless otherwise clearly defined and limited, the first feature being "on" or "under" the second feature can be that the first and second features are in direct contact, or the first and second features are indirectly in contact through an intermediate medium. Moreover, the first feature being "above", "over", and "on top of" the second feature can be that the first feature is directly above or obliquely above the second feature, or merely indicates that the first feature has a higher horizontal height than the second feature. The first feature being "below", "beneath", and "underneath" the second feature can be that the first feature is directly below or obliquely below the second feature, or merely indicates that the first feature has a lower horizontal height than the second feature.

[0070] It should be noted that when an element is referred to as being "fixed to" or "disposed on" another element, it can be directly on the other element or there may also be an intermediate element. When an element is considered to be "connected" to another element, it can be directly connected to the other element or there may be an intermediate element at the same time. The terms "vertical", "horizontal", "upper", "lower", "left", "right" and similar expressions used herein are only for illustrative purposes and do not represent the only implementation.

[0071] The first embodiment

[0072] Please refer to Figures 1 to 5(c) , the first embodiment of the present application provides a wire cutting instrument 100. The wire cutting instrument 100 includes: a first tube body 110, a plurality of wire cutting parts 120, a mounting plate 130, a plurality of first transmission parts 140, and a second tube body 150.

[0073] Refer to Figures 3 to 5(c) , the mounting plate 130 is disposed at the distal end of the first tube body 110, and a plurality of wire cutting parts 120 are respectively connected to the mounting plate 130, so that a plurality of wire cutting parts 120 are respectively connected to the distal end of the first tube body 110. The plurality of wire cutting parts 120 are arranged in sequence along the circumferential direction of the first tube body 110. The plurality of first transmission parts 140 correspond to the plurality of wire cutting parts 120 respectively, and are in one-to-one correspondence in this embodiment. The first transmission part 140 is connected to the corresponding wire cutting part 120, so that the plurality of first transmission parts 140 are arranged in sequence along the circumferential direction of the first tube body 110. As shown in Figure 1 and Figure 2 , the second tube body 150 is rotatably connected to the first tube body 110. The plurality of first transmission parts 140 are respectively connected to the second tube body 150. When the second tube body 150 rotates relative to the first tube body 110, it drives the plurality of first transmission parts 140 to move respectively, and the first transmission part 140 drives the corresponding wire cutting part 120 to move, so that the plurality of wire cutting parts 120 gather towards the center of the first tube body 110 or disperse outward from the center of the first tube body 110. The center here refers to the center of the cross-section where the wire cutting part 120 is located, that is, the intersection of the cross-section where the wire cutting part 120 is located and the axis of the first tube body 110.

[0074] Refer to Figure 4As shown in FIGS. 5(a) and 5(b), when a plurality of wire-cutting portions 120 disperse outward from the center of the first tube body 110, the plurality of wire-cutting portions 120 enclose a first wire-passing space 101. When using the above-mentioned wire-cutting instrument 100 to cut a wire during endoscopic surgery, the wire-cutting instrument 100 can be moved so that the distal end of the first tube body 110 moves to the target position in the patient's body, and the position of the wire-cutting instrument 100 is moved so that one end of the surgical suture passes through the first wire-passing space 101. Then, by rotating the second tube body 150 to drive the respective first transmission members 140 to move, the first transmission members 140 drive the corresponding wire-cutting portions 120 to move, so that the plurality of wire-cutting portions 120 gather towards the center of the first tube body 110, thereby gradually reducing the first wire-passing space 101. Furthermore, the plurality of wire-cutting portions 120 squeeze the surgical suture in the first wire-passing space 101 until the surgical suture is cut off.

[0075] For the above-mentioned wire-cutting instrument 100, by rotating the second tube body 150 to drive the respective first transmission members 140 to move, the first transmission members 140 drive the corresponding wire-cutting portions 120 to move, so that the plurality of wire-cutting portions 120 disperse outward from the center of the first tube body 110, thereby the first wire-passing space 101 can be enlarged, making it easy for the surgical suture to pass through the first wire-passing space 101, and the success rate of wire-passing is high. Furthermore, by rotating the second tube body 150 to drive the respective first transmission members 140 to move, the first transmission members 140 drive the corresponding wire-cutting portions 120 to move, so that when the plurality of wire-cutting portions 120 gather towards the center of the first tube body 110, it is easy to cut off the surgical suture, facilitating the acceleration of the surgical process and reducing the surgical risk.

[0076] Furthermore, as Figure 6 and Figure 9 shown, a first avoidance hole 102 is provided at the center of the mounting plate 130. The first avoidance hole 102 is respectively communicated with the first wire-passing space 101 and the lumen of the first tube body 110. Thus, when the surgical suture penetrates into the first wire-passing space 101, the first avoidance hole 102 can avoid the surgical suture, enabling the surgical suture to enter the lumen through the first wire-passing space 101 and the first avoidance hole 102. Furthermore, the length of the surgical suture passing through the first wire-passing space 101 can be made long enough, so that the surgical suture will not easily move out of the first wire-passing space 101, facilitating the smooth cutting of the surgical suture by the plurality of wire-cutting portions 120.

[0077] It should be noted that the above-mentioned wire-cutting instrument 100 is not limited to being used for cutting surgical sutures, but can also be used for cutting other wires. For example, it can be used in the clothing industry to cut the thread ends of the stitches after sewing clothes.

[0078] In one embodiment, a plurality of wire cutting parts 120 are respectively rotatably connected to the mounting plate 130. The first transmission member 140 is used to drive the corresponding wire cutting part 120 to rotate relative to the mounting plate 130, so that the plurality of wire cutting parts 120 gather towards the center of the first pipe body 110 or disperse outward from the center of the first pipe body 110. Please refer to Figures 5(a) to 5(c) , specifically in this embodiment, each wire cutting part 120 corresponds to a first rotating shaft 121 and is rotatably connected to the mounting plate 130 through the corresponding first rotating shaft 121.

[0079] Please refer to Figures 5(a) to 5(c) , in one embodiment, the mounting plate 130 is provided with a plurality of first sliding grooves 131. The plurality of first sliding grooves 131 respectively correspond to the plurality of first transmission members 140, and in this embodiment, they are in one-to-one correspondence. The extending direction of the first sliding groove 131 is defined as the first preset direction, so each first sliding groove 131 has its own corresponding first preset direction. The first transmission member 140 is slidably matched with the corresponding first sliding groove 131 along the corresponding first preset direction. When the second pipe body 150 rotates relative to the first pipe body 110 so as to drive the first transmission member 140 to move, the first transmission member 140 slides along the corresponding first sliding groove 131 along the corresponding first preset direction. In this embodiment, the first transmission member 140 is rotatably connected to the corresponding wire cutting part 120. Therefore, when the second pipe body 150 rotates relative to the first pipe body 110 so as to drive the first transmission member 140 to slide along the corresponding first sliding groove 131, the first transmission member 140 can drive the corresponding wire cutting part 120 to rotate relative to the mounting plate 130.

[0080] Please combine Figures 5(a) to 5(c) and Figure 7 , specifically in this embodiment, the first transmission member 140 includes a first transmission rod 141, a first connecting rod 142 and a first connecting shaft 143. The first sliding groove 131 is an arc-shaped sliding groove, and the first transmission member 140 is slidably matched with the first sliding groove 131 through the first transmission rod 141. One end of the first connecting rod 142 is connected to the first transmission rod 141, and the other end is connected to the first connecting shaft 143. The first connecting shaft 143 is rotatably connected to the corresponding wire cutting part 120, so that the first transmission member 140 is rotatably connected to the corresponding wire cutting part 120. As Figure 6 shown, in this embodiment, a first shaft hole 103 is provided on the mounting plate 130, and the first connecting shaft 143 is rotatably connected to the wire cutting part 120 by cooperating with the first shaft hole 103.

[0081] Please combine Figure 1 and Figure 2, in one embodiment, a first end plate 151 is provided at the distal end of the second tube body 150. The first end plate 151 and the second tube body 150 may be integrally formed or connected after being separately formed. The first end plate 151 is provided with a plurality of second sliding grooves 152. The plurality of second sliding grooves 152 respectively correspond to the plurality of first transmission members 140, and in this embodiment, they are in one-to-one correspondence. The extending direction of the second sliding groove 152 is defined as the second preset direction, so each second sliding groove 152 has its corresponding second preset direction. The first transmission member 140 and the corresponding second sliding groove 152 are slidably engaged along the corresponding second preset direction. The second preset direction is different from the corresponding first preset direction. Thus, when the second tube body 150 rotates relative to the first tube body 110, through the sliding fit between the first transmission member 140 and the corresponding second sliding groove 152, the first transmission member 140 can be driven to slide along the corresponding first sliding groove 131 along the corresponding first preset direction.

[0082] As Figure 2 shown, in this embodiment, the second preset direction is along the radial direction of the second tube body 150. The first transmission member 140 is engaged with the second sliding groove 152 through a first transmission rod 141. The second tube body 150 is sleeved outside the first tube body 110, and the first end plate 151 is located on the distal side of the wire cutting portion 120. The wire cutting portion 120 is provided at the distal end of the mounting plate 130.

[0083] Furthermore, as Figure 2 shown, a second avoidance hole 106 is provided at the center of the first end plate 151. The second avoidance hole 106 communicates with the first threading space 101. Thus, when the surgical suture penetrates into the first threading space 101, the second avoidance hole 106 can avoid the surgical suture, so that the surgical suture can enter the first threading space 101 through the second avoidance hole 106, facilitating the plurality of wire cutting portions 120 to smoothly cut the surgical suture.

[0084] In other embodiments, it may also be that the first tube body is sleeved outside the second tube body, the wire cutting portion is provided at the proximal end of the mounting plate, and the first end plate is located on the proximal side of the wire cutting portion.

[0085] Please refer to Figures 8(a) to 8(c) , in one embodiment, the wire cutting instrument 100 further includes a plurality of clamping portions 160 and a plurality of second transmission members 170. The plurality of clamping portions 160 are respectively connected to the mounting plate 130. The plurality of clamping portions 160 are located on the side of the plurality of wire cutting portions 120 close to the proximal end of the first tube body 110. The plurality of clamping portions 160 are arranged in sequence along the circumferential direction of the first tube body 110. The plurality of second transmission members 170 are respectively connected to the plurality of clamping portions 160, and in this embodiment, they are in one-to-one connection. The second transmission member 170 is used to drive the corresponding clamping portion 160 to move, so that the plurality of clamping portions 160 gather towards the center of the first tube body 110 or disperse outward from the center of the first tube body 110.

[0086] Referring to FIGS. 8(a) to 8(c), when the plurality of clamping portions 160 are dispersed outward from the center of the first tube body 110, the plurality of clamping portions 160 enclose the second wire threading space 104. Since the plurality of clamping portions 160 are located on the side of the plurality of wire cutting portions 120 close to the proximal end of the first tube body 110, the second wire threading space 104 is located on the side of the first wire threading space 101 close to the proximal end of the first tube body 110. When using the above-mentioned wire cutting instrument 100 to cut a wire during a microscopic operation, the distal end of the first tube body 110 can be moved to the target position in the patient's body by moving the wire cutting instrument 100, and one end of the surgical suture can be passed through the first wire threading space 101 and the second wire threading space 104 in sequence by moving the position of the wire cutting instrument 100.

[0087] After one end of the surgical suture passes through the first wire threading space 101 and the second wire threading space 104 in sequence, the corresponding clamping portion 160 is driven to move by the second transmission member 170, so that the plurality of clamping portions 160 clamp the surgical suture. When the plurality of clamping portions 160 clamp the surgical suture, the position of the wire cutting instrument 100 can be moved to tighten the surgical suture in the proximal direction. After the surgical suture is tightened in the proximal direction, the plurality of first transmission members 140 are respectively driven to move by rotating the second tube body 150, so that the plurality of wire cutting portions 120 gather towards the center of the first tube body 110 to cut the surgical suture. Since the surgical suture is in a tightened state when the plurality of wire cutting portions 120 cut the surgical suture, it is easy to cut the surgical suture.

[0088] Referring to FIGS. 5(a) to 5(c) and Figure 6 , and, referring to FIGS. 8(a) to 8(c) and Figure 9 , specifically in this embodiment, the number of the mounting plates 130 is one, the wire cutting portions 120 are arranged at the distal end of the mounting plate 130, and the clamping portions 160 are arranged at the proximal end of the mounting plate 130.

[0089] In other embodiments, two mounting plates may also be provided. The two mounting plates are arranged at intervals along the length direction of the first tube body, and one of the mounting plates is located on the side of the other mounting plate along the distal end direction of the first tube body. The wire cutting portions are arranged on one of the mounting plates, and the clamping portions are arranged on the other mounting plate. Then, the wire cutting portions can be arranged at the proximal end or the distal end of the corresponding mounting plate, and the clamping portions can be arranged at the proximal end or the distal end of the corresponding mounting plate.

[0090] Please refer to Figures 8(a) to 8(c) , Figure 6 and Figure 9 , in an embodiment, the plurality of second transmission members 170 are respectively connected to the plurality of first transmission members 140 in a one-to-one correspondence in this embodiment. The first transmission member 140 can drive the corresponding second transmission member 170 to move.

[0091] Since the first transmission member 140 can drive the corresponding second transmission member 170 to move, during the process of driving the plurality of wire cutting parts 120 to move respectively by the plurality of first transmission members 140 so as to cut the surgical suture, the second transmission member 170 can simultaneously drive the corresponding clamping part 160 to move so as to clamp the surgical suture.

[0092] It should be noted that the movement stroke range of the second transmission member 170 can be pre-designed so that before the plurality of wire cutting parts 120 cut the surgical suture, the plurality of second transmission members 170 have driven the plurality of clamping parts 160 to clamp the surgical suture first. In this way, after the plurality of clamping parts 160 clamp the surgical suture, by moving the position of the wire cutting instrument 100, the surgical suture can be tightened in the proximal direction, so that when the plurality of wire cutting parts 120 cut the surgical suture, the surgical suture is in a tightened state, and thus it is easy to cut the surgical suture.

[0093] Moreover, since the first transmission member 140 can drive the corresponding second transmission member 170 to move, only by driving the first transmission member 140 to move through the second tube body 150 can the second transmission member 170 be driven to move at the same time, and there is no need to specially allocate separate drive mechanisms for the first transmission member 140 and the second transmission member 170.

[0094] Please refer to Figures 8(a) to 8(c) 、 Figure 6 and Figure 9 , in an embodiment, the mounting plate 130 is provided with a plurality of limiting structures 132. The plurality of limiting structures 132 correspond to the plurality of second transmission members 170 respectively, and are in one-to-one correspondence in this embodiment. The plurality of second transmission members 170 correspond to the plurality of first transmission members 140 respectively, and are in one-to-one correspondence in this embodiment.

[0095] Please refer to Figures 5(a) to 5(c) , during the process of the plurality of wire cutting parts 120 gradually converging towards the center of the first tube body 110, the movement of the first transmission member 140 is divided into a continuous first movement stroke and a second movement stroke. From Figures 5(a) to 5(b) to Figures 5(b) to 5(c) the first transmission member 140 moves along the first movement stroke, and from

[0096] to Figures 5(a) to 5(b)During the process, when the first transmission member 140 moves in the first motion stroke, it can drive the second transmission member 170 to move together, so that the second transmission member 170 can drive the corresponding clamping portion 160 to move, and further cause the plurality of clamping portions 160 to gather towards the center of the first tube body 110. During this process, the motion process of the second transmission member 170 is from Figures 8(a) to 8(b) of the process.

[0097] Until the first transmission member 140 is at the critical point between the first motion stroke and the second motion stroke, that is, the state shown in Fig. 5(b). At this time, the plurality of clamping portions 160 clamp the surgical suture, and the limiting structure 132 blocks the corresponding second transmission member 170 from moving towards the second motion stroke. The second transmission member 170 is in the state shown in Fig. 8(b) at this time.

[0098] When the first transmission member 140 is at the critical point between the first motion stroke and the second motion stroke, that is, the state shown in Fig. 5(b), since the plurality of clamping portions 160 clamp the surgical suture, therefore, by moving the position of the suture cutting instrument 100, the surgical suture can be tightened towards the proximal direction. After tightening the surgical suture towards the proximal direction, let the first transmission member 140 continue to move along the second motion stroke, that is, from Figures 5(b) to 5(c) of the process, then the plurality of suture cutting portions 120 gather towards the center of the first tube body 110 until the surgical suture is cut. During this process, the second transmission member 170 is as Figures 8(b) to 8(c) shown, and its position remains unchanged due to being restricted by the limiting structure 132.

[0099] Since the limiting structure 132 blocks the corresponding second transmission member 170 from moving towards the second motion stroke when the first transmission member 140 is at the critical point between the first motion stroke and the second motion stroke in Fig. 5(b), therefore, from Figures 5(b) to 5(c) of the process when the first transmission member 140 moves in the second motion stroke, the second transmission member 170 cannot move towards the second motion stroke, and the position of the second transmission member 170 remains at the critical point between the first motion stroke and the second motion stroke (as Figures 8(b) to 8(c) ), thus, during the process that the first transmission member 140 moves along the second motion stroke to cause the plurality of suture cutting portions 120 to gather towards the center of the first tube body 110 to cut the surgical suture, the plurality of clamping portions 160 keep the surgical suture tightened, which is conducive to cutting the surgical suture. Moreover, during the process that the first transmission member 140 moves along the first motion stroke and the second motion stroke in sequence, the plurality of clamping portions 160 first clamp the surgical suture, and then the plurality of suture cutting portions 120 cut the surgical suture, making the clamping and cutting processes relatively continuous, convenient to operate, and accelerating the surgical process.

[0100] In addition, in this embodiment, when the first transmission member 140 moves to one end of the second movement stroke away from the first movement stroke (i.e., as shown in Fig. 5(c)), the plurality of wire cutting portions 120 cut the surgical suture. At this time, the position of the second transmission member 170 still remains at the critical point between the first movement stroke and the second movement stroke (i.e., as shown in Fig. 8(c)), and the plurality of clamping portions 160 still clamp the surgical suture. Thus, when the wire cutting instrument 100 is moved out of the patient's body, it can ensure that the surgical suture is moved out of the patient's body.

[0101] As Figures 8(a) to 8(c) shown, specifically in this embodiment, the plurality of clamping portions 160 are respectively rotatably connected to the mounting plate 130. The second transmission member 170 is rotatably connected to the corresponding clamping portion 160. Therefore, when the first transmission member 140 moves in the first movement stroke and drives the second transmission member 170 to move together, the second transmission member 170 can drive the corresponding clamping portion 160 to rotate relative to the mounting plate 130, so that the plurality of clamping portions 160 converge towards the center of the first tube body 110 or disperse outward from the center of the first tube body 110.

[0102] Please refer to Figures 8(a) to 8(c) , specifically in this embodiment, each clamping portion 160 corresponds to a second rotating shaft 161 and is rotatably connected to the mounting plate 130 through the corresponding second rotating shaft 161.

[0103] Please combine Figures 8(a) to 8(c) and Figure 7 , the second transmission member 170 includes a second transmission rod 171, a second connecting rod 172, and a second connecting shaft 173. When the first transmission member 140 moves in the first movement stroke, it drives the second transmission rod 171 to move through the first transmission rod 141, thereby driving the second transmission member 170 to move. One end of the second connecting rod 172 is connected to the second transmission rod 171, and the other end is connected to the second connecting shaft 173. The second connecting shaft 173 is rotatably connected to the corresponding clamping portion 160, so that the second transmission member 170 is rotatably connected to the corresponding clamping portion 160. As Figure 9 shown, in this embodiment, a second shaft hole 105 is provided on the mounting plate 130, and the second connecting shaft 173 is rotatably connected to the clamping portion 160 by cooperating with the second shaft hole 105.

[0104] Furthermore, as Figure 7 shown, a sleeve 174 is provided at one end of the second connecting rod 172. By sleeving the sleeve 174 on the second transmission rod 171, one end of the second connecting rod 172 is connected to the second transmission rod 171, which is convenient for assembly.

[0105] Please refer to Figure 7, in one embodiment, the wire cutting instrument 100 further includes a plurality of elastic members 180. The plurality of elastic members 180, the plurality of second transmission members 170, and the plurality of first transmission members 140 are respectively arranged in correspondence. In this embodiment, the elastic members 180, the second transmission members 170, and the first transmission members 140 are in one-to-one correspondence. The second transmission member 170 is movably connected to the corresponding first transmission member 140 through the corresponding elastic member 180. When the first transmission member 140 moves in the first movement stroke, it can drive the second transmission member 170 to move together through the elastic member 180. When the first transmission member 140 is at the critical point between the first movement stroke and the second movement stroke, the second transmission member 170 is blocked by the limiting structure 132 and cannot move towards the second movement stroke. At this time, the first transmission member 140 can overcome the elastic force of the elastic member 180, causing the elastic member 180 to undergo elastic deformation, so as to continue to move along the second movement stroke. The elastic member 180 is, for example, a spiral spring, a silicone member, etc. Specifically, in this embodiment, that is, the first transmission rod 141 is connected to the second transmission rod 171 through the elastic member 180.

[0106] In other embodiments, the second transmission member and the first transmission member can also be cooperated by magnetic attraction. When the first transmission member moves in the first movement stroke, the second transmission member and the first transmission member move together through the adsorption force between the two. When the first transmission member is at the critical point between the first movement stroke and the second movement stroke, the second transmission member is blocked by the limiting structure and cannot move towards the second movement stroke. At this time, the first transmission member can overcome the adsorption force with the second transmission member, so as to separate from the second transmission member and continue to move along the second movement stroke.

[0107] Combined with Figures 5(a) to 5(c) and Figure 6 , in one embodiment, the first chute 131 includes a first part corresponding to the first movement stroke and a second part corresponding to the second movement stroke. Therefore, the first part of the first chute 131 is the part that the first transmission member 140 passes through during the process from Fig. 5(a) to Fig. 5(b), and the second part of the first chute 131 is the part that the first transmission member 140 passes through during the process from Fig. 5(b) to Fig. 5(c).

[0108] The limiting structure 132 is a limiting chute, and the second transmission member 170 is slidably matched with the limiting chute. The position of the limiting chute corresponds to the position of the first part of the first chute 131, and the extending direction of the limiting chute is parallel to the extending direction of the first part of the first chute 131. Thus, during the process from Figures 5(a) to 5(b) , when the first transmission member 140 moves along the first part of the first chute 131, it drives the second transmission member 170 to move together along the limiting chute, and the limiting chute can simultaneously limit the movement direction of the second transmission member 170.

[0109] Until the critical point of the first movement stroke and the second movement stroke of the first transmission member 140, i.e., the state shown in Fig. 5(b), that is, the first transmission member 140 is at the critical point between the first part and the second part of the first chute 131. At this time, the second transmission member 170 moves to one end of the limit chute close to the second part, and the groove wall at one end of the limit chute close to the second part can block the second transmission member 170 from continuing to move in the second movement stroke, and the first transmission member 140 can continue to move along the second part of the first chute 131 (i.e., continue to move in the second movement stroke). Specifically, in this embodiment, the limit chute (limit structure 132) is located on one side of the first chute 131 close to the proximal end of the first pipe body 110.

[0110] In one embodiment, as Figure 6 shown, the first chute 131 is communicated with the limit chute, which is convenient for processing and assembly.

[0111] In other embodiments, the limit chute can also be located on one side (inner or outer side) of the first chute along the axial or radial direction of the first pipe body. At this time, the first chute and the limit chute can also be not communicated.

[0112] In other embodiments, the limit structure can also not be a limit chute. For example, it is a limit protrusion protruding from the mounting plate. The limit protrusion is at the critical point between the first movement stroke and the second movement stroke. Thus, when the second transmission member moves to the critical point between the first movement stroke and the second movement stroke along with the first transmission member, the limit protrusion can block the second transmission member from continuing to move in the second movement stroke.

[0113] In one embodiment, the second pipe body 150 is threadedly connected to the first pipe body 110, so that the second pipe body 150 rotates relative to the first pipe body 110.

[0114] In other embodiments, the second pipe body and the first pipe body can also be rotatably connected by means of keyway connection, bearing connection, etc.

[0115] Please refer to Figure 10 , in one embodiment, a clamping mark 112 is provided on the outer peripheral surface of the first pipe body 110. The second pipe body 150 is sleeved on the first pipe body 110 and is threadedly connected to the first pipe body 110. Thus, when the second pipe body 150 rotates relative to the first pipe body 110, it can move axially along the first pipe body 110 while moving its position relative to the first pipe body 110. When the position of the second pipe body 150 corresponds to the clamping mark 112, the first transmission member 140 is at the critical point between the first movement stroke and the second movement stroke. At this time, it means that the plurality of clamping portions 160 clamp the surgical suture, so that the surgical suture can be tightened by moving the position of the suture cutting instrument 100.

[0116] Specifically, in this embodiment, when the proximal end of the second tube body 150 corresponds to the clamping mark 112, the first transmission member 140 and the second transmission member 170 are at the critical point between the first movement stroke and the second movement stroke. In this embodiment, the clamping mark 112 is a marked line.

[0117] In other embodiments, a first indicating hole may also be formed on the second tube body. When the first transmission member does not reach the critical point between the first movement stroke and the second movement stroke, the second tube body blocks the clamping mark. When the first transmission member reaches the critical point between the first movement stroke and the second movement stroke, the position of the first indicating hole corresponds to the clamping mark, so that the clamping mark is exposed. At this time, it indicates that the plurality of clamping portions clamp the surgical suture. The clamping mark may also be a marked figure (such as a triangle, a circle, etc.).

[0118] Please refer to Figure 10 , in an embodiment, a cutting mark 113 is provided on the outer peripheral surface of the first tube body 110. The second tube body 150 is sleeved on the first tube body 110 and is threadedly connected to the first tube body 110. Thus, when the second tube body 150 rotates relative to the first tube body 110, it can move axially along the first tube body 110 while moving its position relative to the first tube body 110. When the position of the second tube body 150 corresponds to the cutting mark 113, the first transmission member 140 moves to one end of the second movement stroke away from the first movement stroke. At this time, it indicates that the plurality of wire cutting portions 120 cut the surgical suture.

[0119] Specifically, in this embodiment, when the proximal end of the second tube body 150 corresponds to the cutting mark 113, the first transmission member 140 moves to one end of the second movement stroke away from the first movement stroke. In this embodiment, the cutting mark 113 is a marked line.

[0120] In other embodiments, a second indicating hole may also be formed on the second tube body. When the first transmission member does not reach one end of the second movement stroke away from the first movement stroke, the second tube body blocks the cutting mark. When the first transmission member reaches one end of the second movement stroke away from the first movement stroke, the position of the second indicating hole corresponds to the cutting mark, so that the cutting mark is exposed. At this time, it indicates that the plurality of wire cutting portions cut the surgical suture. The cutting mark may also be a marked figure (such as a triangle, a circle, etc.).

[0121] In an embodiment, the mounting plate 130 is detachably connected to the first tube body 110, so that the wire cutting portion 120 is detachably connected to the first tube body 110, and the clamping portion 160 is detachably connected to the first tube body 110, thereby facilitating the maintenance of the wire cutting instrument 100.

[0122] Please combine Figure 4 , Figure 6 , Figure 9 and Figure 11In one embodiment, the mounting plate 130 is provided with a plurality of ears 133 arranged at intervals along the circumference of the first tube body 110. The ears 133 protrude from the mounting plate 130 along the radial direction of the first tube body 110. A plurality of mounting grooves 111 corresponding to the plurality of ears 133 are provided at the distal end of the first tube body 110, and in this embodiment, they correspond one to one. The mounting grooves 111 cooperate with the corresponding ears 133. An elastic blocking member 1113 is provided on the groove wall of the mounting groove 111. The elastic blocking member 1113 has a blocking state capable of blocking the ears 133 from moving out of the mounting groove 111, and an avoidance state capable of allowing the ears 133 to move out of the mounting groove 111. The elastic blocking member 1113 can switch between the blocking state and the avoidance state through its own elastic deformation.

[0123] When the mounting groove 111 cooperates with the corresponding lug 133, the corresponding elastic blocking member 1113 is in a blocking state, and the elastic blocking member 1113 can prevent the lug 133 from moving out of the mounting groove 111, so that the mounting groove 111 and the corresponding lug 133 can be reliably matched, and then the mounting plate 130 and the first tube body 110 are reliably connected. When the mounting plate 130 needs to be removed from the first tube body 110, the elastic blocking member 1113 can be squeezed by the lug 133, so that the elastic blocking member 1113 switches to the avoidance state through its own elastic deformation, so that the lug 133 can be moved out of the mounting groove 111, and the mounting plate 130 is conveniently removed from the first tube body 110.

[0124] Please combine Figure 4 and Figure 11 In one embodiment, the mounting groove 111 includes a first groove 1111 and a second groove 1112 connected to the first groove 1111. The first groove 1111 extends in the axial direction of the first tube body 110, the second groove 1112 extends in the circumferential direction of the first tube body 110, and the second groove 1112 is located at the proximal end of the first groove 1111. The elastic blocking member 1113 is located at the connection between the first groove 1111 and the second groove 1112, and the connection between the first groove 1111 and the second groove 1112 has a first groove wall 111a facing the distal end of the first tube body 110, and the elastic blocking member 1113 is arranged on the first groove wall 111a.

[0125] When the mounting groove 111 cooperates with the corresponding lug 133, the lug 133 is placed in the second groove 1112, and at this time, the elastic blocking member 1113 is in a blocking state. Since the elastic blocking member 1113 is arranged on the first groove wall 111a, the elastic blocking member 1113 can block the lug 133 from moving into the first groove 1111, thereby preventing the lug 133 from moving out of the mounting groove 111, so that the mounting groove 111 and the corresponding lug 133 can be reliably matched. When it is necessary to disassemble the mounting plate 130 from the first tube body 110, the lug 133 can be moved toward the first groove 1111, so that the lug 133 squeezes the elastic blocking member 1113, so that the elastic blocking member 1113 switches to an avoidance state through its own elastic deformation, so that the lug 133 can move out of the first groove 1111, and it is convenient for the mounting plate 130 to be disassembled from the first tube body 110. It can be understood that, in this embodiment, the elastic deformation direction of the elastic blocking member 1113 is along the length direction of the first tube 110. The elastic blocking member 1113 is, for example, a ball screw, a spring, a silicone member, and the like.

[0126] In other embodiments, the mounting groove may also extend axially along the first tube body, and the mounting groove has two groove walls opposite to each other along the circumference of the first tube body. The elastic blocking member is arranged on any one or both of the two groove walls, and the elastic deformation direction of the elastic blocking member is along the circumference of the first tube body. The elastic blocking member can also be switched between the blocking state and the avoidance state through the elastic deformation, thereby facilitating the disassembly and assembly of the mounting plate.

[0127] In one embodiment, the thread cutting portion 120 has a thread cutting blade at one end of the first tube 110 facing radially inward, so as to facilitate cutting of the surgical suture thread by the thread cutting portion 120 at one end of the first tube 110 facing radially inward.

[0128] Please refer to Figure 12(a). In one embodiment, the thread cutting portion 120 has a first surface 122 and a second surface 123 on two sides opposite to each other along the circumference of the first tube body 110, respectively. The first surface 122 has a thread cutting edge, and the second surface 123 has a thread cutting edge. Then, among two adjacent thread cutting portions 120, the first surface 122 of one thread cutting portion 120 cooperates with the second surface 123 of the other thread cutting portion 120 to cut the surgical suture.

[0129] Please refer to FIG. 12( a ). In one embodiment, the thread cutting portion 120 has a first surface 122 and a second surface 123 on two opposite sides of the circumferential direction of the first tube body 110. The first surface 122 is a concave surface, and the second surface 123 is a convex surface. Among two adjacent thread cutting portions 120, the convex surface of one thread cutting portion 120 cooperates with the concave surface of the other thread cutting portion 120, so that the two adjacent thread cutting portions 120 cooperate closely, which is conducive to smoothly cutting the surgical suture. When all the thread cutting portions 120 are completely closed, there is no gap between them.

[0130] Please refer to FIG. 12(b). In one embodiment, on two opposite sides along the circumferential direction of the first tube body 110, the clamping part 160 has a third surface 162 and a fourth surface 163 respectively. The third surface 162 is a concave surface, and the fourth surface 163 is a convex surface. Neither the third surface 162 nor the fourth surface 163 is a sharp cutting edge, but an unsharpened blunt surface to prevent the surgical suture from being cut off. And there is a notch at the tip of the clamping part 160. Among two adjacent clamping parts 160, the convex surface of one clamping part 160 cooperates with the concave surface of the other clamping part 160, so that the two adjacent clamping parts 160 are closely fitted, which is beneficial to clamping the surgical suture. When all the wire-cutting parts 120 are completely closed, a gap is formed at the tip convergence for the surgical suture to pass through, so as not to cut off the surgical suture.

[0131] Second Embodiment

[0132] The basic structure of the wire-cutting instrument in the second embodiment is the same as that of the wire-cutting instrument in the first embodiment, and the same parts will not be described in detail below. The differences between the wire-cutting instrument in the second embodiment and the wire-cutting instrument in the first embodiment will be mainly introduced below.

[0133] In this embodiment, the first transmission member is fixedly connected to the corresponding wire-cutting part. The extending direction of the first sliding groove is along the radial direction of the first tube body. When the second tube body rotates relative to the first tube body so as to drive the first transmission member to move, the first transmission member slides along the radial direction of the first tube body. Thus, the first transmission member drives the corresponding wire-cutting part to move along the radial direction of the first tube body, and further can also make multiple wire-cutting parts gather towards the center of the first tube body or disperse outward from the center of the first tube body.

[0134] In one embodiment, the second sliding groove is an arc-shaped sliding groove. When the second tube body rotates relative to the first tube body, through the sliding fit between the first transmission member and the corresponding second sliding groove, the first transmission member can be driven to slide along the corresponding first sliding groove.

[0135] In one embodiment, since the first transmission member slides along the radial direction of the first tube body when the second tube body rotates relative to the first tube body so as to drive the first transmission member to move, therefore, when the first transmission member moves in the first movement stroke, it can drive the second transmission member to move along the radial direction of the first tube body together. Thus, the second transmission member can drive the corresponding clamping part to move along the radial direction of the first tube body, and further can also make multiple clamping parts gather towards the center of the first tube body.

[0136] In one embodiment, since the extending direction of the first sliding groove is along the radial direction of the first tube body, therefore, the extending direction of the limiting sliding groove is also along the radial direction of the first tube body.

[0137] Third Embodiment

[0138] The basic structure of the wire cutting instrument of the third embodiment is the same as that of the wire cutting instrument of the first embodiment, and the same parts will not be described in detail below. The differences between the wire cutting instrument of the third embodiment and the wire cutting instrument of the first embodiment will be mainly introduced below.

[0139] In this embodiment, multiple wire cutting parts are respectively rotatably connected to the mounting plate. The first transmission member is used to drive the corresponding wire cutting part to rotate relative to the mounting plate, so that multiple wire cutting parts gather towards the center of the first tube body or disperse outward from the center of the first tube body. In this embodiment, for example, a first toothed ring is provided on the inner peripheral surface of the second tube body, and each first transmission member is a first gear. Multiple first gears are respectively engaged with the first toothed ring. Thus, when the second tube body rotates, the first toothed ring drives multiple first gears to rotate simultaneously, and each first gear can drive the corresponding wire cutting part to rotate relative to the mounting plate. Among them, each first gear can drive the corresponding wire cutting part to rotate relative to the mounting plate through the corresponding first rotating shaft.

[0140] In one embodiment, during the process that multiple wire cutting parts gather towards the center of the first tube body, the first toothed ring drives the first transmission member (first gear) to rotate, thereby driving the corresponding wire cutting part to rotate. That is to say, the movement of the first transmission member in the first movement stroke and the second movement stroke is rotation. Therefore, the first transmission member rotates a first angle in the first movement stroke and rotates a second angle in the second movement stroke.

[0141] During the process that the first transmission member rotates a first angle in the first movement stroke, it drives the second transmission member to rotate a first angle together, so that the second transmission member drives the corresponding clamping part to move, and further makes multiple clamping parts gather towards the center of the first tube body.

[0142] Until the first transmission member is at the critical point between the first movement stroke and the second movement stroke, that is, when the first transmission member rotates the first angle, at this time, multiple clamping parts clamp the surgical suture, and the limiting structure blocks the corresponding second transmission member from rotating towards the second movement stroke.

[0143] When the first transmission member is at the critical point between the first movement stroke and the second movement stroke, since multiple clamping parts clamp the surgical suture, the position of the wire cutting instrument can be moved to tighten the surgical suture towards the proximal direction. After tightening the surgical suture towards the proximal direction, let the first transmission member continue to move along the second movement stroke, that is, rotate the second angle again, then multiple wire cutting parts gather towards the center of the first tube body until the surgical suture is cut. During this process, the second transmission member is limited by the limiting structure and thus the angle remains unchanged.

[0144] When the first transmission member is at the critical point between the first motion stroke and the second motion stroke, the limiting structure blocks the corresponding second transmission member from rotating towards the second motion stroke. Therefore, when the first transmission member rotates in the second motion stroke, the second transmission member cannot rotate towards the second motion stroke, and the angle of the second transmission member remains at the critical point between the first motion stroke and the second motion stroke. Thus, when the first transmission member rotates along the second motion stroke to cause multiple wire-cutting portions to converge towards the center of the first tube body to cut the surgical suture, the multiple clamping portions maintain the state of tightening the surgical suture, and thus it is easy to cut the surgical suture. Moreover, during the process of the first transmission member rotating successively along the first motion stroke and the second motion stroke, the multiple clamping portions first clamp the surgical suture, and then the multiple wire-cutting portions cut the surgical suture, making the processes of clamping and cutting relatively continuous, facilitating operation, and accelerating the surgical process.

[0145] In addition, in this embodiment, when the first transmission member rotates to the end of the second motion stroke away from the first motion stroke, the multiple wire-cutting portions cut the surgical suture. At this time, the angle of the second transmission member still remains at the critical point between the first motion stroke and the second motion stroke, and the multiple clamping portions still clamp the surgical suture. Thus, when the wire-cutting instrument is removed out of the patient's body, it can be ensured that the surgical suture is removed out of the patient's body.

[0146] Specifically, in this embodiment, the multiple clamping portions are respectively rotatably connected to the mounting plate. Therefore, when the first transmission member rotates in the first motion stroke, it drives the second transmission member to rotate together, and then the second transmission member can drive the corresponding clamping portion to rotate relative to the mounting plate, so that the multiple clamping portions converge towards the center of the first tube body or disperse outward from the center of the first tube body. The second transmission member is, for example, a second gear. Wherein, each second gear can drive the corresponding clamping portion to rotate relative to the mounting plate through the corresponding second rotating shaft.

[0147] In one embodiment, the elastic member is a torsion spring. The first gear and the corresponding second gear are connected by the corresponding torsion spring. When the first transmission member (first gear) rotates in the first motion stroke, it can drive the second transmission member (second gear) to rotate together through the torsion spring. When the first transmission member (first gear) is at the critical point between the first motion stroke and the second motion stroke, the second transmission member (second gear) is blocked by the limiting structure and cannot rotate towards the second motion stroke. At this time, the first transmission member (first gear) can overcome the elastic torsion of the torsion spring, causing the torsion spring to undergo torsional deformation, and thus continue to rotate along the second motion stroke.

[0148] In one embodiment, the limiting structure may be a limiting convex portion provided on the mounting plate. A mating convex portion protruding radially along the second transmission member (second gear) is provided on the second transmission member (second gear). When the first transmission member (first gear) is at the critical point between the first motion stroke and the second motion stroke, the mating convex portion is blocked by the limiting convex portion, so that the second transmission member (second gear) can be blocked from continuing to rotate in the second motion stroke.

[0149] Fourth Embodiment

[0150] The basic structure of the wire-cutting instrument of the fourth embodiment is the same as that of the wire-cutting instrument of the first embodiment, and the same parts will not be described in detail below. The differences between the wire-cutting instrument of the fourth embodiment and the wire-cutting instrument of the first embodiment will be mainly introduced below.

[0151] In this embodiment, the movement of the second transmission member is not driven by the first transmission member. Specifically, the wire-cutting instrument includes a third tube body, and the first tube body can be sleeved on the third tube body so that the third tube body is rotationally connected to the first tube body. When the third tube body rotates relative to the first tube body, a plurality of second transmission members are driven to move respectively, and the second transmission members drive the corresponding clamping portions to move, so that the plurality of clamping portions can also gather towards the center of the first tube body or disperse outward from the center of the first tube body.

[0152] When using the wire-cutting instrument of this embodiment to cut a wire during a microscopic operation, after one end of the surgical suture passes through the first wire-passing space and the second wire-passing space in sequence, when the third tube body rotates relative to the first tube body, a plurality of second transmission members are driven to move respectively, and the second transmission members drive the corresponding clamping portions to move, so that the plurality of clamping portions clamp the surgical suture. When the plurality of clamping portions clamp the surgical suture, the position of the wire-cutting instrument can be moved to tighten the surgical suture in the proximal direction. After the surgical suture is tightened in the proximal direction, the second tube body is rotated to drive the plurality of first transmission members to move respectively, so that the plurality of wire-cutting portions gather towards the center of the first tube body to cut the surgical suture. Since the surgical suture is in a tightened state when the plurality of wire-cutting portions cut the surgical suture, it is easy to cut the surgical suture.

[0153] In one embodiment, the mounting plate is provided with a plurality of third sliding grooves. The plurality of third sliding grooves correspond to the plurality of second transmission members respectively, and in this embodiment, they are in one-to-one correspondence. The extending direction of the third sliding groove is defined as the third preset direction, and each third sliding groove has its corresponding third preset direction. The second transmission member is slidably engaged with the corresponding third sliding groove along the corresponding third preset direction. When the third tube body rotates relative to the first tube body so as to drive the second transmission member to move, the second transmission member slides along the corresponding third sliding groove along the corresponding third preset direction. In this embodiment, the second transmission member is rotatably connected to the corresponding clamping portion. Therefore, when the third tube body rotates relative to the first tube body so as to drive the second transmission member to slide along the corresponding third sliding groove, the second transmission member can drive the corresponding clamping portion to rotate relative to the mounting plate. In this embodiment, the third sliding groove is an arc-shaped sliding groove.

[0154] In one embodiment, a second end plate is provided at the distal end of the third tube body. The second end plate and the third tube body can be integrally formed or connected after being separately formed. The second end plate is provided with a plurality of fourth sliding grooves. The plurality of fourth sliding grooves correspond to the plurality of second transmission members respectively, and in this embodiment, they are in one-to-one correspondence. The extending direction of the fourth sliding groove is defined as the fourth preset direction, and each fourth sliding groove has its corresponding fourth preset direction. The second transmission member is slidably engaged with the corresponding fourth sliding groove along the corresponding fourth preset direction. The fourth preset direction is different from the corresponding third preset direction. Thus, when the third tube body rotates relative to the first tube body, through the sliding fit between the second transmission member and the corresponding fourth sliding groove, the second transmission member can be driven to slide along the corresponding third sliding groove along the corresponding third preset direction. In this embodiment, the fourth preset direction is along the radial direction of the third tube body. The second end plate is located on the proximal side of the clamping portion.

[0155] Furthermore, a third avoidance hole is provided at the center of the second end plate, and the third avoidance hole communicates with the fourth threading space. Thus, when the surgical suture penetrates into the fourth threading space, the third avoidance hole can avoid the surgical suture, enabling the surgical suture to enter the lumen through the fourth threading space and then through the third avoidance hole, and further enabling the length of the surgical suture passing through the fourth threading space to be long enough, facilitating the clamping of the surgical suture by the plurality of clamping portions.

[0156] Fifth Embodiment

[0157] The wire cutting instrument of the fifth embodiment has the same basic structure as that of the fourth embodiment. The same parts will not be described in detail below. The differences between the wire cutting instrument of the fifth embodiment and that of the fourth embodiment will be mainly introduced below.

[0158] In this embodiment, the second transmission member is fixedly connected to the corresponding clamping portion, and the extending direction of the third chute is along the radial direction of the first tube body. When the third tube body rotates relative to the first tube body so as to drive the second transmission member to move, the second transmission member slides along the radial direction of the first tube body, so that the second transmission member drives the corresponding clamping portion to move along the radial direction of the first tube body, and further enables a plurality of clamping portions to gather towards the center of the first tube body or disperse outward from the center of the first tube body.

[0159] In one embodiment, the fourth chute is an arc chute. When the third tube body rotates relative to the first tube body, through the sliding fit between the second transmission member and the corresponding fourth chute, the second transmission member can be driven to slide along the corresponding third chute.

[0160] Sixth Embodiment

[0161] The basic structure of the wire cutting instrument in the sixth embodiment is the same as that of the wire cutting instrument in the fourth embodiment. The same parts will not be described in detail below. The differences between the wire cutting instrument in the sixth embodiment and the wire cutting instrument in the fourth embodiment will be mainly introduced below.

[0162] In this embodiment, a plurality of clamping portions are respectively rotatably connected to the mounting plate. A second gear ring is provided on the inner peripheral surface of the third tube body. Each second transmission member is a second gear, and a plurality of second gears are respectively meshed with the second gear ring. Thus, when the third tube body rotates, the second gear ring drives a plurality of second gears to rotate synchronously, and each second gear can drive the corresponding clamping portion to rotate relative to the mounting plate, and further enable a plurality of clamping portions to gather towards the center of the first tube body or disperse outward from the center of the first tube body.

[0163] The technical features of the above-described embodiments can be combined arbitrarily. For the sake of concise description, not all possible combinations of the technical features in the above embodiments are described. However, as long as there is no contradiction in the combination of these technical features, it should be considered as the scope described in this specification.

[0164] The above-described embodiments only represent several implementation manners of the present invention. The description is relatively specific and detailed, but it should not be construed as a limitation on the scope of the invention patent. It should be noted that for those of ordinary skill in the art, without departing from the concept of the present invention, several deformations and improvements can still be made, and these all belong to the protection scope of the present invention. Therefore, the protection scope of the invention patent should be subject to the appended claims.

Claims

1. A wire cutting instrument, characterized in that, the wire cutting instrument includes: a first tube body, with a mounting plate provided at the distal end of the first tube body; a plurality of wire cutting parts, respectively connected to the mounting plate, and the plurality of wire cutting parts are arranged in sequence along the circumferential direction of the first tube body; a plurality of first transmission parts, the plurality of first transmission parts are correspondingly connected to the plurality of wire cutting parts; and a second tube body, the second tube body is rotatably connected to the first tube body, and the plurality of first transmission parts are respectively connected to the second tube body; when the second tube body rotates relative to the first tube body, it drives the plurality of first transmission parts to move respectively, and the first transmission part drives the corresponding wire cutting part to move, so that the plurality of wire cutting parts gather towards the center of the first tube body or disperse outward from the center of the first tube body; the mounting plate is provided with a plurality of first sliding grooves corresponding to the plurality of first transmission parts, and the first transmission part and the corresponding first sliding groove are slidably matched along a first preset direction, so that when the second tube body rotates relative to the first tube body, it drives the first transmission part to slide along the corresponding first sliding groove; the first transmission part is rotatably connected to the corresponding wire cutting part, so that when the first transmission part slides along the corresponding first sliding groove, it drives the corresponding wire cutting part to rotate relative to the mounting plate; a first end plate is provided at the distal end of the second tube body, and the first end plate is provided with a plurality of second sliding grooves corresponding to the plurality of first transmission parts, and the first transmission part and the corresponding second sliding groove are slidably matched along a second preset direction; when the second tube body rotates relative to the first tube body, through the sliding match between the first transmission part and the corresponding first sliding groove, it drives the first transmission part to move along the corresponding second sliding groove; the wire cutting instrument further includes a plurality of clamping parts and a plurality of second transmission parts, the plurality of clamping parts are respectively connected to the mounting plate, the plurality of clamping parts are located on one side of the plurality of wire cutting parts close to the proximal end of the first tube body, and the plurality of clamping parts are arranged in sequence along the circumferential direction of the first tube body; the plurality of second transmission parts are correspondingly connected to the plurality of clamping parts, and the second transmission part is used to drive the corresponding clamping part to move, so that the plurality of clamping parts gather towards the center of the first tube body or disperse outward from the center of the first tube body; the plurality of second transmission parts are correspondingly connected to the plurality of first transmission parts, so that the first transmission part can drive the corresponding second transmission part to move; the mounting plate is provided with a plurality of limiting structures corresponding to the plurality of second transmission parts, and the first transmission part has a continuous first movement stroke and a second movement stroke; the limiting structure is used to block the corresponding second transmission part from moving along the second movement stroke.

2. The wire cutting instrument according to claim 1, characterized in that, The wire cutting instrument further includes a plurality of elastic members corresponding to the plurality of second transmission members, and the second transmission members are movably connected to the corresponding first transmission members through the corresponding elastic members; when the first transmission members move in the first movement stroke, the corresponding second transmission members are driven to move together through the corresponding elastic members; when the first transmission members are at the critical point between the first movement stroke and the second movement stroke, the first transmission members can move along the second movement stroke through the elastic deformation of the elastic members.

3. The wire cutting instrument according to claim 1, wherein, the mounting plate is provided with a plurality of first sliding grooves corresponding to the plurality of first transmission members, the first transmission members are slidably engaged with the corresponding first sliding grooves, and the first sliding grooves include a first portion corresponding to the first movement stroke and a second portion corresponding to the second movement stroke; the mounting plate is provided with a plurality of limiting sliding grooves corresponding to the plurality of second transmission members, the second transmission members are slidably engaged with the limiting sliding grooves; the position of the limiting sliding grooves corresponds to the position of the first portion of the first sliding grooves, and the extending direction of the limiting sliding grooves is parallel to the extending direction of the first portion of the first sliding grooves.

4. The wire cutting instrument according to claim 3, wherein, the first sliding grooves and the limiting sliding grooves are axially communicated.

5. The wire cutting instrument according to claim 1, wherein, the plurality of clamping parts are respectively rotatably connected to the mounting plate, and the second transmission members are rotatably connected to the corresponding clamping parts, so that when the second transmission members move, the corresponding clamping parts are driven to rotate relative to the mounting plate.

6. The wire cutting instrument according to claim 1, wherein, a clamping mark is provided on the outer peripheral surface of the first tube body, the second tube body is sleeved on the first tube body and is threadedly connected to the first tube body, and when the position of the second tube body corresponds to the clamping mark, the first transmission member is at the critical point between the first movement stroke and the second movement stroke.

7. The wire cutting instrument according to claim 1, wherein, a cutting mark is provided on the outer peripheral surface of the first tube body, the second tube body is sleeved on the first tube body and is threadedly connected to the first tube body, and when the position of the second tube body corresponds to the cutting mark, the first transmission member is at one end of the second movement stroke far from the first movement stroke.

8. The wire cutting instrument according to claim 1, wherein, the mounting plate is detachably connected to the first tube body.

9. The wire cutting instrument according to claim 8, wherein, the mounting plate is provided with a plurality of lugs arranged at intervals along the circumferential direction of the first tube body, and the lugs protrude from the mounting plate in the radial direction of the first tube body; a plurality of mounting grooves corresponding to the plurality of lugs are provided at the distal end of the first tube body, and the mounting grooves cooperate with the corresponding lugs; The groove wall of the installation groove is provided with an elastic blocking member, which has a blocking state capable of blocking the support ear from moving out of the installation groove, and an avoidance state capable of allowing the support ear to move out of the installation groove. The elastic blocking member can switch between the blocking state and the avoidance state through its own elastic deformation.

10. The thread trimming device according to claim 1, It is characterized in that The thread cutting portion has a thread cutting blade at one end inwardly facing the radial direction of the first tube; and / or, The thread cutting portion has a first surface and a second surface at two sides away from each other along the circumferential direction of the first tube body, respectively. The first surface and the second surface have thread cutting edges, respectively.

11. The thread trimmer according to claim 1, It is characterized in that The thread cutting part has a first surface and a second surface on two opposite sides along the circumference of the first tube body, the first surface is a concave surface, and the second surface is a convex surface; among the two adjacent thread cutting parts, the first surface of one thread cutting part cooperates with the concave surface of the other thread cutting part.

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