CN112869805A

CN112869805A - Thread trimmer

Info

Publication number: CN112869805A
Application number: CN202110289570.7A
Authority: CN
Inventors: 屠攀; 徐军; 秦鑫
Original assignee: Shanghai Huihe Healthcare Technology Co Ltd
Current assignee: Shanghai Huihe Healthcare Technology Co Ltd
Priority date: 2021-03-12
Filing date: 2021-03-12
Publication date: 2021-06-01

Abstract

The application provides a wire cutting device, mainly including the outer tube that is arranged in the location suture, wear to locate the core pipe in the outer tube to and connect the trimming subassembly of outer tube and core pipe respectively, wherein, the axial reciprocating motion of outer tube can be followed to the core pipe, and drive the trimming subassembly and switch between non-action state and action state, in order to cut the suture. Borrow this application's wire cutter can provide fine shearing force to have the advantage of small and exquisite size.

Description

Thread trimmer

Technical Field

The embodiment of the application relates to the technical field of medical equipment, in particular to a wire shearing device.

Background

In an interventional operation, since a distance between an operation position of a doctor and a target position in a patient is long, a wire cutting instrument needs to be conveyed to the target position in the patient through a catheter to perform a cutting operation on a wire (such as a suture) at the target position, however, the design size of the wire cutting instrument is limited due to the arrangement of the catheter.

In view of the above, there is a need for a small-sized wire cutter capable of increasing a better cutting force.

Disclosure of Invention

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

The embodiment of the application provides a wire cutter, it includes: an outer tube for positioning a suture; the core pipe is movably arranged in the outer pipe in a penetrating way; and a wire cutting assembly connecting the outer tube and the core tube; the core tube can reciprocate along the axial direction of the outer tube and drives the thread shearing assembly to switch between a non-action state and an action state so as to shear the thread.

Optionally, the outer tube further comprises a tube body and a fitting structure extending in an axial direction of the tube body for pivotally connecting the thread cutting assembly and positioning the suture.

Optionally, the assembling structure includes two extension arms, which are respectively disposed on two opposite sides of the pipe body and extend along the axial direction of the pipe body to define a U-shaped groove communicated with the pipe body; the positioning parts are respectively arranged on the two extension arms and used for defining a suture path, so that the suture arranged on the positioning parts extends along the suture path in the U-shaped groove; and the pivoting piece is used for pivoting the trimming component to the two extension arms so that the trimming component is suspended in the U-shaped groove, and the axial direction of the trimming component is intersected with the suture path.

Optionally, the wire cutter further comprises a linkage assembly, the wire cutter assembly further comprises: a first scissor arm and a second scissor arm; wherein the first and second scissor arms are pivotally connected by the pivot; and wherein the first scissor arm and the second scissor arm are movably connected with the core tube via the linkage assembly; the first scissor arm is actuatable to pivot relative to the second scissor arm to switch the wire cutting assembly from the inactive state to the active state when the core tube is axially moved toward the proximal end of the outer tube; the first scissor arm is actuatable to pivot in a reverse direction relative to the second scissor arm to switch the wire cutting assembly from the active state to the inactive state when the core tube is axially moved toward the distal end of the outer tube.

Optionally, the wire cutter 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 may be respectively abutted to restrict movement of the core tube relative to the outer tube to maintain the wire cutter assembly in the active state or the inactive state.

Optionally, the first scissor arm comprises: a first blade portion, a first abutting portion; the second scissor arm includes: a second blade portion, a second abutting portion; when the thread cutting assembly is in the action state, the first blade part and the second blade part are in a closed state to execute thread cutting operation; the first and second abutments combining with one another to form an abutment structure that can abut the suture extending along the suture path; when the thread cutting assembly is in the non-action state, the first blade part and the second blade part are in an opening state, and the first abutting part and the second abutting part are mutually separated to dissociate the abutting structure, so that the abutting structure abuts against the suture of the abutting structure to enter the space between the first blade part and the second blade part.

Optionally, the first and second abutments each comprise a notch provided at an end of the first and second scissor arms.

Optionally, the wire cutting assembly further comprises a limiting portion disposed 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 suture cutter further comprises a thread guiding structure provided on the first and/or second scissor arms and abutting a positioning portion on the extension arm and the abutment structure, respectively, the thread guiding structure being configured to guide the suture at the positioning portion to the abutment structure.

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

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

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

Optionally, the linkage assembly comprises a first linkage and a second linkage, wherein the first linkage is pivotally connected to the second linkage and the second scissor arm; the second linkage pivotally connects the first scissor arm and the core tube.

Optionally, the outer tube and the core tube further have a bending portion respectively for bending the outer tube and the core tube under the action of an external force.

According to the technical scheme, the thread trimmer can provide a better cutting effect, so that smooth operation is facilitated.

Moreover, the thread trimmer of the embodiment of the application has the advantages of being simple in operation and small in 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 needed to be used in the description of the embodiments or the prior art will be briefly described below, 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 can be obtained by those skilled in the art according to the drawings.

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

fig. 3 is a partial structural view of the thread trimmer shown in fig. 2;

fig. 4 is an exploded view of the wire cutter of the present application;

fig. 5 and 6 are views showing an embodiment of a locking structure of the wire clipper of the present application.

Element number

1: a wire cutter;

11: sewing;

2: an outer tube;

20: assembling the structure;

21: a pipe body;

22: a bending section;

202: a U-shaped groove;

204: an extension arm;

205: a positioning part;

2051: positioning holes;

206: a pivot member;

2061: a pivot shaft;

2062: a pivot part;

3: a core tube;

32: a bending section;

34: connecting holes;

4: a thread trimming assembly;

40: an abutting structure;

42: a first scissor arm;

422: a first blade section;

424: a first abutting portion;

426, 428: a pivot part;

44: a second scissor arm;

442: a second blade portion;

444: a second abutting portion;

446: a pivot part;

46: a limiting part;

5: a locking structure;

51: a lock body;

52: an outer tube locking member;

53: a core tube locking member;

64: lead structure

7: a linkage member;

71: a first linkage member;

712, 714: a pivot part;

72: a second linkage member;

721,722: a pivot part;

73, 74, 75: a connecting rod.

Detailed Description

In order to make those skilled in the art better understand the technical solutions in the embodiments of the present application, the technical solutions in the embodiments of the present application will be described clearly and completely below with reference to the drawings in the embodiments of the present application, and it is obvious that the described embodiments are only a part of the embodiments of the present application, but not all embodiments. All other embodiments obtained by a person of ordinary skill in the art based on the embodiments in the present application shall fall within the scope of the protection of the embodiments in the present application.

The following further describes specific implementations of the embodiments of the present application with reference to the drawings of the embodiments of the present application.

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

As shown in fig. 1 and 2, a wire cutter 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 can be used for positioning the suture 11, the core tube 3 can be movably inserted into the outer tube 2, and the thread trimming assembly 4 is respectively connected to the outer tube 2 and the core tube 3.

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 the inactive state and the active state so as to cut the thread 11 positioned on the outer tube 2.

Optionally, the outer tube 2 and the core tube 3 further have bending

portions

22 and 32, respectively, so that the outer tube 2 and the core tube 3 are bent by external force, thereby facilitating the input of the wire cutter 1 to a target position in a patient body via a catheter.

Alternatively, the outer tube 2 may include a tube body 21 for passing through the core tube 3 and a fitting structure 20 extending in an axial direction of the tube body 21 for pivotally connecting the thread cutting assembly 4 and positioning the thread 11 (refer to fig. 4).

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

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

Positioning portion 205 is disposed on two extending arms 204 to define a suture path, such that a suture threaded into positioning portion 205 extends along the suture path in U-shaped channel 202.

In the present embodiment, the positioning portion 205 includes two positioning holes 2051 formed at corresponding positions of the two extension arms 204 to form a suture path radially penetrating the U-shaped groove 202.

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

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

Optionally, wire cutting assembly 4 includes first and second scissor arms 42, 44, and wire cutter 1 further includes linkage assembly 7.

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

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

In the present embodiment, the first scissor arm 42 and the second scissor arm 44 are movably connected to the core tube 3 via the linkage assembly 7.

Optionally, the linkage assembly 7 includes a first linkage member 71 and a second linkage member 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 tube 3.

In the present embodiment, the pivoting portion 712 of the first linking member 71 is pivotally connected to the second scissor arm 44 via the link 73 (please note that the pivotal position (not shown) where the second scissor arm 44 is pivotally connected to the first linking member 71 is different from the pivotal position (i.e. the pivoting portion 446) where the second scissor arm 44 is pivotally connected to the first scissor arm 42); the pivoting part 714 of the first linkage member 71 is pivoted with the pivoting part 721 of the second linkage member 72; the pivot portion 722 of the second link 72, the link 74, the pivot portion 428 of the first scissor arm 42, the link 75, and the connecting hole 34 at the top end of the core tube 2 are coaxially pivoted.

In particular, as the core tube 3 is moved axially towards the proximal end of the outer tube 2 (i.e. the end of the wire cutter 1 which is proximal to the operator), 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; conversely, when the core 3 is moved axially towards the distal end of the outer tube 2 (i.e. the end of the wire cutter 1 remote from the operator), the first scissor arm 42 may be driven to pivot in the opposite direction relative to the second scissor arm 44 to switch the wire cutting assembly 4 from the active state to the inactive state.

In the present embodiment, the wire cutter 1 further includes a locking structure 5 (refer to fig. 5 and 6), which is switchable between a locking state and a non-locking state, wherein when the locking structure 5 is in the locking state, the locking structure can respectively abut against the outer tube 2 and the core tube 3 to limit the movement of the core tube 3 relative to the outer tube 2, and the wire cutting assembly 4 is maintained in the active state or the inactive state.

In the present embodiment, the locking structure 5 may include a locking body 51 disposed on the outer tube 2 and provided with the core tube 3 inserted therein, and an outer tube locking member 52 and a core tube locking member 53 inserted in the locking body 51, and the wire cutting assembly 4 is maintained in the active state or the inactive state by adjusting the insertion positions of the outer tube locking member 52 and the core tube locking member 53 with respect to the locking body 51 to restrict or release the axial movement of the core tube 3 with respect to the outer tube 2.

In this 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's body, so as to maintain the wire cutter assembly 4 in an active state.

It should be noted that the above-mentioned locking structure 5 is only an exemplary description, and those skilled in the art can also adopt other structural configurations instead, and the structural design is not limited in the present application, and only the purpose of maintaining the thread trimming assembly 4 in the active state is needed.

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

Referring to fig. 2, when the thread cutting assembly 4 is in an active state, the first blade 422 and the second blade 442 are in a closed state to perform a thread cutting operation; the first and

second abutments

424 and 444 combine with one another to form an abutment structure 40, the abutment structure 40 being usable to abut a suture 11 (see fig. 2 and 3) extending along a suture path.

In the present embodiment, first and

second abutments

424 and 444 each include a notch disposed at an end of first and second scissor arms 42 and 44.

Optionally, wire cutter 1 includes a lead structure 64 disposed on first and/or second scissor arms 42 and 44 and abutting against positioning portion 205 and abutting structure 40, respectively, on extension arm 204, whereby suture 11 at positioning portion 205 may be guided to abutting structure 40 by lead structure 64 (see fig. 2 and 3).

Optionally, lead structure 64 includes a groove disposed on first scissor arm 42 and/or second scissor arm 44.

Preferably, the distance D between the two extension arms 204 (i.e. the width of the U-shaped groove 202) may be smaller than the sum of the wall thicknesses F of the first and second scissor arms 42 and 44 (refer to fig. 4), and by means of this structural design, when the thread trimming assembly 4 is in an active state, the two extension arms 204 can respectively apply a pressing force to the first and second scissor arms 42 and 44, so as to facilitate the first and

second blade portions

422 and 442 in a closed state to smoothly perform the thread trimming operation.

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

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

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

The steps of performing the thread trimming operation using the thread trimmer 1 of the present application are mainly as follows:

step 1, the thread trimming assembly 4 is maintained in the active state by the locking structure 5 to form the abutting structure 40, and the thread 11 positioned on the mounting structure 20 is abutted by the abutting structure 40 (i.e. the state shown in fig. 2 and 3).

Step 2, after the wire cutter 1 is delivered to the target position in the body of the patient, the locking structure 5 is switched from the locking state to the non-locking state, and the core tube 3 is controlled to move axially towards the distal end of the outer tube 2, so that the wire cutting assembly 4 is switched from the active state to the non-active state, in which state, by drawing the suture, the suture 11 abutted in the abutting structure 40 can be made to enter between the first blade portion 422 and the second blade portion 442 of the wire cutting assembly 4 (i.e. the state shown in fig. 1).

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

To sum up, the thread trimmer that this application provided borrows the structural design of the two-piece scissors formula of four-bar linkage drive (the linkage subassembly that constitutes by two linkage spare promptly and the thread trimming subassembly that constitutes by two scissors arms), can provide the shearing force of preferred, also has fine shearing effect to the suture of harder material.

In addition, the wire cutter that this application provided has easy operation, and the less advantage of structure size is particularly useful for the wire cutting operation of intervene type operation.

Finally, it should be noted that: the above embodiments are only used for illustrating the technical solutions of the embodiments of the present application, and are not limited thereto; although the present application has been described in detail with reference to the foregoing embodiments, it should be understood by those of ordinary skill in the art that: the technical solutions described in the foregoing embodiments may still be modified, or some technical features may be equivalently replaced; and such modifications or substitutions do not depart from the spirit and scope of the corresponding technical solutions in the embodiments of the present application.

Claims

1. A wire trimmer, comprising:

an outer tube for positioning a suture;

the core pipe is movably arranged in the outer pipe in a penetrating way; and

a wire cutting assembly connecting the outer tube and the core tube;

the core tube can reciprocate along the axial direction of the outer tube and drives the thread shearing assembly to switch between a non-action state and an action state so as to shear the thread.

2. The wire trimmer of claim 1, wherein the outer tube further comprises:

a pipe body;

and the assembling structure extends along the axial direction of the pipe body and is used for pivoting the thread cutting assembly and positioning the thread.

3. The wire trimmer of claim 2, wherein the mounting structure comprises:

the two extension arms are respectively arranged on two opposite sides of the pipe body and extend along the axial direction of the pipe body so as to define a U-shaped groove communicated with the pipe body;

the positioning parts are respectively arranged on the two extension arms and used for defining a suture path, so that the suture arranged on the positioning parts extends along the suture path in the U-shaped groove;

and the pivoting piece is used for pivoting the trimming component to the two extension arms so that the trimming component is suspended in the U-shaped groove, and the axial direction of the trimming component is intersected with the suture path.

4. The wire trimmer of claim 3, further comprising a linkage assembly, the wire trimmer assembly further comprising: a first scissor arm and a second scissor arm; wherein the content of the first and second substances,

the first scissor arm and the second scissor arm are pivoted by the pivoting piece; and wherein the one or more of the one,

the first scissor arm and the second scissor arm are movably connected with the core pipe through the linkage assembly;

the first scissor arm is actuatable to pivot relative to the second scissor arm to switch the wire cutting assembly from the inactive state to the active state when the core tube is axially moved toward the proximal end of the outer tube;

the first scissor arm is actuatable to pivot in a reverse direction relative to the second scissor arm to switch the wire cutting assembly from the active state to the inactive state when the core tube is axially moved toward the distal end of the outer tube.

5. The wire trimmer of claim 4, further comprising 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 abuttable against each other to limit movement of the core tube relative to the outer tube to maintain the wire trimming assembly in the active state or the inactive state.

6. The wire trimmer of claim 4,

the first scissor arm includes: a first blade portion, a first abutting portion;

the second scissor arm includes: a second blade portion, a second abutting portion;

when the thread cutting assembly is in the action state, the first blade part and the second blade part are in a closed state to execute thread cutting operation; the first and second abutments combining with one another to form an abutment structure that can abut the suture extending along the suture path;

when the thread cutting assembly is in the non-action state, the first blade part and the second blade part are in an opening state, and the first abutting part and the second abutting part are mutually separated to dissociate the abutting structure, so that the abutting structure abuts against the suture of the abutting structure to enter the space between the first blade part and the second blade part.

7. The wire trimmer of claim 6, wherein the first abutment and the second abutment each include a notch disposed at an end of the first scissor arm and the second scissor arm.

8. The wire trimmer of claim 6, wherein the wire trimmer assembly further comprises a stop disposed on the first and/or second scissor arms for defining a maximum pivot angle of the first scissor arm relative to the second scissor arm.

9. The wire trimmer of claim 6, further comprising:

and a thread guide structure provided on the first scissor arm and/or the second scissor arm and abutting the positioning portion and the abutment structure on the extension arm, respectively, the thread guide structure being configured to guide the suture located at the positioning portion to the abutment structure.

10. The wire trimmer of claim 9, wherein the wire guide structure includes a groove disposed on the first scissor arm and/or the second scissor arm.

11. The wire trimmer of claim 4, wherein the spacing of the two extending arms is less than the sum of the wall thicknesses of the first and second scissor arms.

12. The wire trimmer of claim 4, wherein the first and second scissor arms are made of a high carbon steel, high speed tool steel material.

13. The wire trimmer of claim 4, wherein the linkage assembly includes a first linkage and a second linkage, wherein the first linkage pivotally connects the second linkage and the second scissor arm; the second linkage pivotally connects the first scissor arm and the core tube.

14. The wire cutter according to claim 1, wherein the outer tube and the core tube further have a bending portion for bending the outer tube and the core tube under an external force.