CN112869805B - Thread trimmer - Google Patents

本申请提供一种剪线器，主要包括用于定位缝线的外管、穿设于外管中的芯管，以及分别连接外管和芯管的剪线组件，其中，芯管可沿外管的轴向往复移动，并带动剪线组件在非作用状态和作用状态之间切换，以剪切缝线。借此本申请的剪线器可提供很好的剪断力，并具有尺寸小巧的优点。

The present application provides a thread cutter, which mainly includes an outer tube for positioning sutures, a core tube inserted in the outer tube, and a thread cutting assembly respectively connected to the outer tube and the core tube, wherein the core tube can reciprocate along the axial direction of the outer tube and drive the thread cutting assembly to switch between a non-active state and an active state to cut the sutures. The thread cutter of the present application can thereby provide a good cutting force and has the advantage of being small in size.

Thread trimmer

Technical Field

The embodiment of the application relates to the technical field of medical instruments, in particular to a wire cutter.

Background

In interventional operations, since the distance between the operation position of the doctor and the target position in the patient is long, it is necessary to convey the wire cutting device to the target position in the patient by means of the catheter to perform cutting operation on the wire (e.g., suture) at the target position, however, the arrangement of the catheter may result in a limited design size of the wire cutting device.

In view of the foregoing, there is a need for a wire clipper that is compact in size and that can improve the preferred cutting force.

Disclosure of Invention

In view of the above, the present application provides a wire clipper to overcome or at least partially solve the above problems.

The embodiment of the application provides a thread trimmer, which comprises an outer tube, a core tube and a thread trimming assembly, wherein the outer tube is used for positioning a suture, the core tube is movably arranged in the outer tube in a penetrating mode, the thread trimming assembly is connected with the outer tube and the core tube, the core tube can reciprocate along the axial direction of the outer tube, and the thread trimming assembly is driven to switch between an inactive state and an active state so as to trim the suture.

Optionally, the outer tube further comprises a tube body and an assembly structure extending along an axial direction of the tube body for pivoting the trimming assembly and positioning the suture.

Optionally, the assembly structure includes two extension arms, a positioning portion, a pivoting piece and a cutting assembly, wherein the two extension arms are respectively arranged on two opposite sides of the tube body and extend along the axial direction of the tube body to define a U-shaped groove communicated with the tube body, the positioning portion is respectively arranged on the two extension arms and used for defining a suture path, the suture arranged on the positioning portion extends along the suture path in the U-shaped groove, and the pivoting piece is used for pivoting the cutting assembly to the two extension arms so that the cutting assembly is suspended in the U-shaped groove, and the axial direction of the cutting assembly is intersected with the suture path.

Optionally, the wire cutter further comprises a linkage assembly, the wire cutter further comprises a first cutter arm and a second cutter arm, wherein the first cutter arm and the second cutter arm are pivoted by the pivot piece, the first cutter arm and the second cutter arm are movably connected with the core tube through the linkage assembly, the first cutter arm can be driven to pivot relative to the second cutter arm when the core tube moves towards the proximal end of the outer tube axially so that the wire cutter assembly is switched from the inactive state to the active state, and the first cutter arm can be driven to pivot reversely relative to the second cutter arm when the core tube moves towards the distal end of the outer tube axially so that the wire cutter assembly is switched from the active state to the inactive state.

Optionally, the wire clipper further comprises a locking structure switchable between a locked state and an unlocked state, wherein when the locking structure is in the locked state, the outer tube and the core tube are respectively abutted to restrict movement of the core tube relative to the outer tube, while maintaining the wire clipper assembly in the active or inactive state.

The first scissor arm comprises a first cutting edge part and a first abutting part, the second scissor arm comprises a second cutting edge part and a second abutting part, when the line shearing assembly is in the acting state, the first cutting edge part and the second cutting edge part are in a closed state to execute line shearing operation, the first abutting part and the second abutting part are combined with each other to form an abutting structure, the abutting structure can abut against the suture extending along the suture path, when the line shearing assembly is in the non-acting state, the first cutting edge part and the second cutting edge part are in an open state, and the first abutting part and the second abutting part are separated from each other to separate the abutting structure, so that the suture abutting on the abutting structure enters between the first cutting edge part and the second cutting edge part.

Optionally, the first abutment and the second abutment each include a notch provided separately at an end of the first scissor arm and the second scissor arm.

Optionally, the wire cutting assembly further includes a limiting portion provided on the first scissor arm and/or the second scissor arm for defining a maximum pivot angle of the first scissor arm relative to the second scissor arm.

Optionally, the thread trimmer further includes a lead structure disposed on the first and/or second scissor arms and respectively abutting the positioning portion and the abutment structure on the extension arm, the lead structure being configured to guide the suture located at the positioning portion to the abutment structure.

Optionally, the lead structure includes a groove provided on the first scissor arm and/or the second scissor arm.

Optionally, the distance between the two extension arms is smaller than the sum of the wall thicknesses of the first and second scissor arms.

Optionally, the first and second scissor arms are made of high carbon steel and high speed tool steel material.

Optionally, the linkage assembly comprises a first linkage member and a second linkage member, wherein the first linkage member is pivoted with the second linkage member and the second scissor arm, and the second linkage member is pivoted with the first scissor arm and the core tube.

Optionally, the outer tube and the core tube are further provided with bending parts respectively, so that the outer tube and the core tube are bent under the action of external force.

According to the technical scheme, the wire cutter can provide a better cutting effect, so that the smooth execution of an operation is facilitated.

Furthermore, the thread trimmer disclosed by the embodiment of the application has the advantages of simplicity in operation and small structure size, and is particularly suitable for thread trimming operation of interventional operations.

Drawings

In order to more clearly illustrate the embodiments of the present application or the technical solutions in the prior art, the drawings that are required in the embodiments or the description of the prior art will be briefly described below, and it is obvious that the drawings in the following description are only some embodiments described in the embodiments of the present application, and other drawings may be obtained according to these drawings for a person having ordinary skill in the art.

Fig. 1 and 2 are schematic structural views of the thread trimmer of the present application in different states;

FIG. 3 is a schematic view of a part of the line cutter shown in FIG. 2;

FIG. 4 is an exploded view of the wire clipper of the present application;

fig. 5 and 6 are views showing an embodiment of the locking structure of the thread trimmer of the present application.

Element labels

1, A wire cutter;

11, stitching;

2, an outer tube;

20, an assembly structure;

21, a pipe body;

22, bending part;

202, U-shaped grooves;

204, extending arms;

205, a positioning part;

2051, positioning holes;

206, a pivoting piece;

2061, a pivot shaft;

2062, a pivoting part;

3, a core tube;

32, bending part;

34, connecting holes;

4, a wire cutting assembly;

40, an abutting structure;

42, a first scissor arm;

422 a first blade portion;

424 a first abutment;

426,428, pivot;

44 a second scissor arm;

442, a second blade portion;

444 a second abutment;

446, a pivoting part;

46, a limiting part;

5, a locking structure;

51, locking the body;

52, outer tube locking piece;

53 core tube lock;

64 lead structure

7, A linkage piece;

71 a first linkage;

712,714 a pivot;

A second linkage member 72;

721, 722;

73,74, 75.

Detailed Description

In order to better understand the technical solutions in the embodiments of the present application, the following description will clearly and completely describe the technical solutions in the embodiments of the present application with reference to the accompanying drawings in the embodiments of the present application, and it is obvious that the described embodiments are only some embodiments of the present application, not all embodiments. All other embodiments, which are derived by a person skilled in the art based on the embodiments of the present application, shall fall within the scope of protection of the embodiments of the present application.

Embodiments of the present application will be further described with reference to the accompanying drawings.

The thread trimmer 1 of the present application can be applied to the suture cutting operation of interventional operations, but is not limited thereto, and can also be applied to thread trimming operations in other various surgical procedures.

As shown in fig. 1 and 2, the wire clipper 1 of the present application mainly includes an outer tube 2, a core tube 3, and a wire cutting assembly 4.

In this embodiment, the outer tube 2 may be used to position the suture 11, the core tube 3 may be movably inserted into the outer tube 2, and the thread cutting assembly 4 may be connected to the outer tube 2 and the core tube 3, respectively.

The core tube 3 can reciprocate along the axial direction of the outer tube 2 and drive the thread cutting assembly 4 to switch between an inactive state and an active state so as to cut the suture 11 positioned on the outer tube 2.

Optionally, the outer tube 2 and the core tube 3 are further provided with bending parts 22,32, respectively, for bending the outer tube 2 and the core tube 3 under the action of external force, so as to facilitate the wire cutter 1 to be input to a target position in a patient through a catheter.

Alternatively, the outer tube 2 may include a tube body 21 and an assembling structure 20, wherein the tube body 21 is used to pass through the core tube 3, and the assembling structure 20 extends along the axial direction of the tube body 21 to pivotally connect the thread cutting assembly 4 and position the suture 11 (refer to fig. 4).

Alternatively, the mounting structure 20 may include two extension arms 204, a positioning portion 205, and a pivoting member 206.

Referring to fig. 4, two extension arms 204 are respectively disposed on opposite sides of the tube 21 and extend along the axial direction of the tube 21 to define a U-shaped slot 202 communicating with the tube 21.

The positioning portion 205 is provided on the two extension arms 204 to define a suture path along which a suture threaded in the positioning portion 205 extends in the U-shaped slot 202.

In this embodiment, the positioning portion 205 includes two positioning holes 2051 formed at corresponding locations of the two extension arms 204 to form a suture path radially through the U-shaped slot 202.

The pivoting member 206 is used to pivot the wire cutting assembly 4 to the two extension arms 204, such that the wire cutting assembly 4 is suspended in the U-shaped slot 202, and the axial direction of the wire cutting assembly 4 intersects the suture path in the U-shaped slot 202.

In this embodiment, the pivot 206 includes a pivot shaft 2061 and a pivot 2062 formed on the two extension arms 204. The pivot shafts 2061 may extend radially through the wire cutting assembly 4 and be inserted into the two pivot portions 2062 such that the wire cutting assembly 4 is pivotally connected to the mounting structure 20, and the axial direction of the wire cutting assembly 4 is parallel to the axial direction of the U-shaped slot 202 (i.e., the outer tube 2) and intersects the suture path within the U-shaped slot 202. .

Optionally, the wire cutting assembly 4 includes a first cutter arm 42 and a second cutter arm 44, and the wire cutting device 1 further includes a linkage assembly 7.

Alternatively, the first and second scissor arms 42, 44 may be made of high carbon steel, high speed tool steel, and the like.

In this embodiment, the first scissor arm 42 (e.g., via pivot 426) and the second scissor arm 44 (e.g., via pivot 446) may be pivotally coupled via pivot 206 (i.e., pivot axis 2061).

In this embodiment, the first and second scissor arms 42, 44 are movably coupled to the core tube 3 via the linkage assembly 7.

Optionally, the linkage assembly 7 includes a first linkage 71 and a second linkage 32.

In the present embodiment, the first link 71 is pivotally connected to the second link 72 and the second scissor arm 44, and the second link 72 is pivotally connected to the first scissor arm 42 and the core pipe 3.

In the present embodiment, the pivot portion 712 of the first linkage 71 is pivoted to the second scissor arm 44 via the connecting rod 73 (note that the pivot position (not shown) of the second scissor arm 44 to which the first linkage 71 is pivoted is different from the pivot position (i.e. the pivot portion 446) of the second scissor arm 44 to which the first scissor arm 42 is pivoted), the pivot portion 714 of the first linkage 71 is pivoted to the pivot portion 721 of the second linkage 72, and the pivot portion 722 of the second linkage 72, the connecting rod 74, the pivot portion 428 of the first scissor arm 42, the connecting rod 75, and the connecting hole 34 at the top end of the core tube 2 are coaxially pivoted.

Specifically, the first scissor arm 42 may be driven to pivot relative to the second scissor arm 44 to switch the wire cutting assembly 4 from the inactive state to the active state when the core tube 3 is axially moved toward the proximal end of the outer tube 2 (i.e., the end of the wire cutter 1 near the operator), whereas the first scissor arm 42 may be driven to pivot reversely relative to the second scissor arm 44 to switch the wire cutting assembly 4 from the active state to the inactive state when the core tube 3 is axially moved toward the distal end of the outer tube 2 (i.e., the end of the wire cutter 1 far from the operator).

In this embodiment, the wire clipper 1 further includes a locking structure 5 (refer to fig. 5 and 6) that can be switched between a locked state and an unlocked state, wherein when the locking structure 5 is in the locked state, the locking structure can abut against the outer tube 2 and the core tube 3 respectively to limit the movement of the core tube 3 relative to the outer tube 2, so as to maintain the wire cutting assembly 4 in the active state or the inactive state.

In this embodiment, the locking structure 5 may include a locking body 51 disposed on the outer tube 2 and providing the core tube 3 passing therethrough, and an outer tube locking member 52 and a core tube locking member 53 inserted into the locking body 51, so as to limit or release the axial movement of the core tube 3 relative to the outer tube 2 by adjusting the insertion positions of the outer tube locking member 52 and the core tube locking member 53 relative to the locking body 51, thereby maintaining the wire cutting assembly 4 in the active state or the inactive state.

In the present embodiment, the locking structure 5 is mainly used to provide a locking function during the process of delivering the wire cutter 1 to a target position in a patient, so as to maintain the wire cutting assembly 4 in an active state.

It should be noted that the above-mentioned locking structure 5 is only exemplary, and those skilled in the art may also adopt other structural arrangements instead, and the present application is not limited to this structural design, and only needs to maintain the wire cutting assembly 4 in the active state.

Referring to fig. 4, in the present embodiment, the first scissor arm 42 may include a first blade portion 422 and a first abutment portion 424, and the second scissor arm 44 may include a second blade portion 442 and a second abutment portion 444.

Referring to fig. 2, when the wire cutting assembly 4 is in the active state, the first blade 422 and the second blade 442 are in the closed state to perform the wire cutting operation, and the first abutment 424 and the second abutment 444 are combined with each other to form an abutment structure 40, and the abutment structure 40 can be used to abut the suture 11 (see fig. 2 and 3) extending along the suture path.

In this embodiment, the first abutment 424 and the second abutment 444 each include notches that are provided at the ends of the first scissor arm 42 and the second scissor arm 44, respectively.

Optionally, the thread trimmer 1 includes a lead structure 64 disposed on the first scissor arm 42 and/or the second scissor arm 44 and abutting the positioning portion 205 and the abutment structure 40 on the extension arm 204, respectively, and the thread 11 located on the positioning portion 205 can be guided to the abutment structure 40 by the lead structure 64 (refer to fig. 2 and 3).

Optionally, the lead structure 64 includes grooves provided on the first scissor arm 42 and/or the second scissor arm 44.

Preferably, the distance D between the two extension arms 204 (i.e. the groove width of the U-shaped groove 202) is smaller than the sum of the wall thicknesses F of the first scissor arm 42 and the second scissor arm 44 (refer to fig. 4), so that the two extension arms 204 can apply the pressing force to the first scissor arm 42 and the second scissor arm 44 when the scissor assembly 4 is in the active state, so as to facilitate the first blade 422 and the second blade 442 in the closed state to perform the scissor operation smoothly.

Referring to fig. 1, when the wire cutting assembly 4 is in the inactive state, the first blade 422 and the second blade 442 are in an open state, and the first abutment 424 and the second abutment 444 are separated from each other to separate the abutment structure 40, so that the suture 11 abutted to the abutment structure 40 enters between the first blade 422 and the second blade 442.

Optionally, the wire cutting assembly 4 includes a stop 46 provided on the first scissor arm 42 and/or the second scissor arm 44 for defining a maximum pivot angle of the first scissor arm 42 relative to the second scissor arm 44.

In this embodiment, the limiting portion 46 may be disposed only on the second scissor arm 44 (refer to fig. 4).

The steps of performing a thread cutting operation using the thread cutter 1 of the present application are mainly as follows:

Step 1, the locking structure 5 is in a locked state, so that the wire cutting assembly 4 is maintained in an active state to form an abutting structure 40, and the abutting structure 40 abuts the suture 11 positioned on the assembly structure 20 (i.e. the state shown in fig. 2 and 3).

Step 2, after the wire clipper 1 is delivered to the target position in the patient, the locking structure 5 is switched from the locked state to the unlocked state, and the core tube 3 is controlled to axially move toward the distal end of the outer tube 2, so that the wire clipper assembly 4 is switched from the active state to the inactive state, in which the suture 11 abutted in the abutment structure 40 can be brought into between the first and second blade parts 422 and 442 of the wire clipper assembly 4 by pulling the suture (i.e., the state shown in fig. 1).

Step 3, the control core tube 3 is axially moved toward the proximal end of the outer tube 2, so that the wire cutting assembly 4 is switched from the inactive state to the active state again to cut the suture 11 between the first blade portion 422 and the second blade portion 442.

In summary, the thread trimmer provided by the application can provide better shearing force and has better shearing effect on the hard suture by adopting the structural design of driving the double-blade scissors by the four-bar mechanism (namely the linkage assembly formed by the two linkage pieces and the thread trimming assembly formed by the two scissor arms).

In addition, the thread trimmer provided by the application has the advantages of simplicity in operation and smaller structural size, and is particularly suitable for thread trimming operation of interventional operations.

It should be noted that the above-mentioned embodiments are merely for illustrating the technical solutions of the embodiments of the present application, and not for limiting the same, and although the present application has been described in detail with reference to the above-mentioned embodiments, it should be understood by those skilled in the art that the technical solutions described in the above-mentioned embodiments may be modified or some technical features may be equivalently replaced, and these modifications or substitutions do not make the essence of the corresponding technical solutions deviate from the spirit and scope of the technical solutions of the embodiments of the present application.