Wire-driven connecting structure and surgical instrument

Abstract

The utility model discloses a wire drive connecting structure and a surgical instrument, and relates to the field of medical instruments. The wire drive connecting structure comprises a sleeve piece and a connecting component, and the sleeve piece is provided with a receding part. The connecting component is fixedly connected with the sleeve piece, a through hole is formed in the connecting component, the through hole is correspondingly communicated with the receding part, and the connecting component and the receding part jointly form an assembling cavity suitable for assembling a connector on the driving line. According to the utility model, the assembly cavity for assembling the connector on the driving line is established by the abdicating part on the external member and the connecting component; in the assembling process, the driving wire penetrates through the through hole in the connecting component in a sliding mode, and then the connector is arranged on the side, facing the external member, of the connecting component; and afterwards, the sleeve piece and the connecting component are fixed, and the connector is placed at the receding part, so that fixing of the connector on the driving wire is completed, the structure is simple, the fixing effect is stable, the driving wire meeting the wire drive use requirement can be arranged in the limited size in the surgical instrument, and practicability is good.

Description

TECHNICAL FIELD

[0001] The utility model relates to the field of medical apparatus and instruments, and particularly relates to a wire drive connecting structure and surgical instrument. BACKGROUND

[0002] Nickel titanium is an alloy wire with shape memory, corrosion resistance, good biocompatibility and superior elasticity, which is widely used in various medical components, including reinforced winding and braiding of catheter shafts and tubes, shaped recovery baskets, braided and shaped stents and many other uses. After receiving an electrical signal or being heated in other ways, the nickel titanium alloy wire will shorten. After the electrical signal disappears or cools down, the nickel titanium alloy wire will return to its original length. Due to the shape memory function of the nickel titanium alloy wire, it is an excellent choice for many in-vivo applications, including braided stents and catheter reinforcement.

[0003] At present, nickel titanium alloy wire can be used as wire drive rope material in surgical instruments, but the current assembly and fixing method of nickel titanium alloy wire is relatively complex, which easily occupies too much space inside the surgical instrument; it is a problem that needs to be solved by those skilled in the art to arrange nickel titanium alloy wire that meets the use requirements of wire drive in the limited volume inside the surgical instrument. SUMMARY

[0004] To solve the technical problems in the background art, the utility model provides a wire drive connecting structure, which comprises:

[0005] A sleeve is provided with at least one accommodation part;

[0006] A connecting member is fixedly connected with the sleeve, the connecting member is provided with a through hole, the through hole is in communication with the accommodation part, and the connecting member and the accommodation part jointly form an assembly cavity suitable for assembling a connecting head of a driving wire.

[0007] As a preferred technical scheme, the sleeve comprises a cylindrical wall part, and the accommodation part is recessed on an end face of the cylindrical wall part facing the connecting member.

[0008] As a preferred technical scheme, a plurality of accommodation parts are arranged in an annular array on the cylindrical wall part.

[0009] As a preferred technical scheme, the accommodation part is configured as a square groove or an arc-shaped groove.

[0010] As a preferred technical scheme, the connecting member comprises a connecting seat and a connecting sleeve which are fixedly connected, the through hole is arranged on the connecting seat, the connecting sleeve is arranged on one side of the connecting seat close to the sleeve, and the sleeve is sleeved and installed on the outer side of the connecting sleeve.

[0011] As a preferred technical scheme, the coupling sleeve comprises a sleeve part, the sleeve part is sleeved on the peripheral side of the sleeve part, and the sleeve part and the sleeve are provided in an interference fit, press fit, welding or bonding.

[0012] As a preferred technical scheme, the coupling seat is provided with a coupling groove recessed at the end face of the coupling seat facing the sleeve.

[0013] The coupling sleeve is provided with a coupling protrusion, and any coupling protrusion is connected to the outer side of the sleeve part, and the coupling protrusion is correspondingly installed in the coupling groove.

[0014] As a preferred technical scheme, the coupling protrusion is provided in a plurality of forms, and the coupling protrusions are annularly distributed on the peripheral side of the sleeve part near the end of the coupling seat; the coupling protrusion and the coupling groove are provided in an interference fit, press fit, welding or bonding.

[0015] The utility model also provides a surgical instrument, including drive line and above -mentioned line drive connecting structure, the end of drive line is equipped with the connector.

[0016] The technical scheme provided by the utility model has the following advantages:

[0017] The line drive connecting structure provided by the utility model comprises a sleeve and a coupling member, the sleeve is provided with at least one accommodation part, the coupling member is fixedly connected with the sleeve, the coupling member is provided with a through hole, the through hole is in communication with the accommodation part, and the coupling member and the accommodation part jointly form an assembly cavity suitable for assembling the connector on the drive line.

[0018] The line drive connecting structure of the structure fixes the connector of the drive line by the sleeve and the coupling member, specifically, the accommodation part on the sleeve and the coupling member form an assembly cavity for assembling the connector on the drive line; during assembly, the drive line is first slid through the through hole on the coupling member, then the connector is placed on the side of the coupling member facing the sleeve, then the sleeve and the coupling member are fixed, and the connector is placed in the accommodation part, so that the connector on the drive line is fixed, the structure is simple, the fixing effect is stable, the drive line meeting the use requirements of the line drive can be arranged in the limited space of the surgical instrument, and the utility model has good practicability. BRIEF DESCRIPTION OF DRAWINGS

[0019] In order to more clearly illustrate the technical solutions in the specific embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the specific embodiments or the prior art description. Obviously, the drawings described below are some embodiments of the present application, and for those skilled in the art, other drawings can also be obtained without creative labor on the basis of these drawings.

[0020] Figure 1 The structure diagram of the wire drive connection structure provided by the present application is shown in the figure.

[0021] Figure 2 The connection diagram of the sleeve and the connecting seat in the wire drive connection structure provided by the present application is shown in the figure.

[0022] Figure 3 The structure diagram of the sleeve in the wire drive connection structure provided by the present application is shown in the figure.

[0023] Figure 4 The connection diagram of the connecting seat and the connecting sleeve in the wire drive connection structure provided by the present application is shown in the figure.

[0024] Figure 5 The structure diagram of the driving wire in the wire drive connection structure provided by the present application is shown in the figure.

[0025] Explanation of reference signs:

[0026] 1-sleeve; 11-cylinder wall part; 12-position giving part;

[0027] 2-connecting seat; 21-through hole; 22-connecting groove;

[0028] 3-connecting sleeve; 31-sleeve part; 32-connecting protrusion;

[0029] 4-driving wire; 41-connection head. Specific embodiments

[0030] The technical solutions of the present application will be described below in conjunction with the drawings. Obviously, the described embodiments are some embodiments of the present application, not all embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor are within the scope of protection of the present application.

[0031] In the description of this utility model, it should be noted that the terms "center," "upper," "lower," "left," "right," "vertical," "horizontal," "inner," and "outer," etc., indicating the orientation or positional relationship, are based on the orientation or positional relationship shown in the accompanying drawings and are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation, and therefore should not be construed as a limitation of this utility model. Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance.

[0032] In the description of this utility model, it should be noted that, unless otherwise explicitly specified and limited, the terms "installation," "connection," and "joining" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0033] Furthermore, the technical features involved in the different embodiments of this utility model described below can be combined with each other as long as they do not conflict with each other.

[0034] Example

[0035] This embodiment provides a wired drive connection structure, see [link]. Figures 1 to 5 The wire drive connection structure includes kit 1 and connecting components.

[0036] In a specific implementation, kit 1 is adapted to connect with the front end of a surgical instrument, and the connecting component can be connected to a flexible universal joint via a wire drive; through the combination structure of the proximal wire drive and the flexible universal joint, the movement position and bending angle of kit 1 and the front end instrument on the distal side can be adjusted. The front end instrument can be configured as forceps, scissors, suction device, retractor, electrocautery gun, etc.

[0037] In this embodiment, see Figure 1 and Figure 3 The kit 1 and the connecting member are used together to fix the connector 41 of the limiting drive line 4. Specifically, the kit 1 has one or more clearance portions 12. The connecting member is fixedly connected to the kit 1 and has a through hole 21 that communicates with the clearance portion 12. The connecting member and the clearance portion 12 together form an assembly cavity suitable for assembling the connector 41 on the drive line 4. The connector 41 is installed through the assembly cavity, which is formed by the clearance space of the clearance portion 12 and the outer end face of the connecting member facing the kit 1.

[0038] As a preferred embodiment, referring to Figure 3 The kit 1 comprises a barrel wall portion 11, and the allowance portion 12 is recessed on the end face of the barrel wall portion 11 towards the coupling member. The barrel wall portion 11 serves as a fixed base for mounting the connector 41 to the mating coupling member, and the barrel wall portion 11 can also serve as a fixed base for connecting the front-end instrument.

[0039] In a specific embodiment, the allowance portion 12 is provided in multiple, and the multiple allowance portions 12 are arranged in an annular array on the barrel wall portion 11. Taking an example where the drive wire 4 is provided with four, the allowance portion 12 is correspondingly provided with four, the four allowance portions 12 are annularly distributed, and the connector 41 at the distal end of the four drive wires 4 is respectively arranged at the four allowance portions 12.

[0040] In some embodiments, the allowance portion 12 is configured as a square slot. Specifically, the connector 41 can be provided as a ball head structure, and the allowance portion 12 is configured as a square slot, the ball head structure is arranged in the square slot, and the square slot is easy to manufacture, which is conducive to reducing manufacturing costs.

[0041] In some embodiments, the allowance portion 12 is configured as an arc-shaped slot. Specifically, the connector 41 can be provided as a ball head structure, and the allowance portion 12 is configured as an arc-shaped slot, the ball head structure is arranged in the arc-shaped slot, and in the wire driving operation stage, the ball head structure and the inner wall surface of the arc-shaped slot are in contact, the force receiving area is large, the curved surface contact slides, which is conducive to strengthening the compact structure and improving the smoothness of the wire driving.

[0042] In an embodiment, the allowance space of the allowance portion 12 can be arranged in communication with the external environment.

[0043] In another embodiment, the allowance portion 12 is arranged in isolation from the external environment. Specifically, a stopper surrounding edge can be arranged on the barrel wall portion 11, and the stopper surrounding edge is arranged on the radial outer side of the allowance portion 12. When the kit 1 and the coupling member are fixed, the allowance portion 12 is isolated from the external environment by the stopper surrounding edge.

[0044] In some embodiments, referring to Figure 1 and Figure 4 The coupling member comprises a coupling seat 2 and a coupling sleeve 3 fixedly connected, a through hole 21 is arranged on the coupling seat 2, the coupling sleeve 3 is arranged on the side of the coupling seat 2 close to the kit 1, and the kit 1 is sleeved and mounted on the outer side of the coupling sleeve 3. By fixing the coupling seat 2 and the kit 1, and fixing the coupling sleeve 3 and the kit 1, the connection area is increased, the connection strength is improved, and the reliability of the kit 1 and the coupling member forming the assembly cavity is ensured.

[0045] As a further embodiment, referring to Figure 4The coupling sleeve 3 comprises a sleeve part 31, the sleeve part 31 is sleeved on the outer circumferential side of the sleeve part 1, and the sleeve part 31 and the sleeve part 1 are arranged in an interference fit. Specifically, the sleeve part 31 and the barrel wall part 11 of the sleeve part 1 are arranged in an interference fit, the outer diameter of the sleeve part 31 is slightly larger than the inner diameter of the barrel wall part 11, so that the two are fixed and limited by structural interference. In other embodiments, the sleeve part 31 and the sleeve part 1 are arranged in a crimping manner. Specifically, the sleeve part 31 and the barrel wall part 11 can be coupled by an external punch acting in the radial direction of the barrel wall part 11, so that the barrel wall part 11 is deformed by crimping, and the inner structure of the barrel wall part 11 is embedded in the sleeve part 31, so that the barrel wall part 11 and the sleeve part 31 are relatively fixed. The crimping point and the number of the punch can be configured according to the actual crimping and fixing requirements. Of course, the sleeve part 31 and the sleeve part 1 can be fixed by other methods, such as welding or bonding.

[0046] As a further embodiment, see Figure 4 The coupling seat 2 is provided with a coupling groove 22, and the coupling groove 22 is recessed on the end face of the coupling seat 2 facing the sleeve part 1. The coupling sleeve 3 is provided with a coupling protrusion 32, and any coupling protrusion 32 is connected to the outer side of the sleeve part 31. The coupling protrusion 32 is correspondingly installed in the coupling groove 22. The coupling protrusion 32 and the coupling groove 22 can be assembled and fixed by interference fit, so as to fix the coupling seat 2 and the coupling sleeve 3. The coupling groove 22 and the through hole 21 are arranged in a staggered manner. Of course, the coupling protrusion 32 and the coupling groove 22 can be fixed by other methods, such as crimping, welding or bonding.

[0047] As a preferred embodiment, the coupling protrusion 32 is provided with a plurality of coupling protrusions 32, and the coupling protrusion 32 is annularly distributed on the outer circumferential side of the sleeve part 31 close to the end of the coupling seat 2. Correspondingly, the coupling groove 22 is provided with a plurality of coupling grooves 22, so as to abut the plurality of coupling protrusions 32 through the plurality of coupling grooves 22, thereby improving the connection strength and stability between the coupling seat 2 and the coupling sleeve 3.

[0048] In a specific embodiment, the barrel wall part 11 of the sleeve part 1 and the coupling seat 2 of the coupling member are arranged in a welding manner. In the assembly stage, after the sleeve part 1 and the coupling member are combined and aligned, the radial end face of one end of the barrel wall part 11 abuts against the end face of the coupling sleeve 3 facing the barrel wall part 11, so as to fix the outer wall of the barrel wall part 11 and the outer wall of the coupling sleeve 3 by welding.

[0049] In some embodiments, the sleeve part 1 and the coupling member can be provided with an intervention channel of other surgical instruments. Specifically, the barrel wall part 11 of the sleeve part 1 is provided with a first channel, and the sleeve part 31 of the coupling member is provided with a second channel. The first channel and the second channel are arranged in communication, so as to provide an intervention channel for other surgical instruments.

[0050] The utility model also provides a surgical instrument, including drive line 4 and the line drive connection structure of above-mentioned, seeFigure 5 The end of the driving line 4 is provided with a connecting head 41.

[0051] In the specific embodiment, the connecting head 41 is provided in a ball head structure. The driving line 4 is provided in an elongated elastic rod structure, and the outer diameter of the ball head structure is greater than the outer diameter of the driving line 4, so that the connecting head 41 can be effectively limited and fixed in the assembly cavity.

[0052] For the driving line 4 described above, a nickel-titanium alloy wire can be specifically used.

[0053] For the manufacturing method of the driving line 4 using the nickel-titanium alloy wire, the specific steps are as follows:

[0054] Step one: a nickel-titanium alloy wire with a diameter of 0.5 mm and a length of 10 cm can be selected.

[0055] Step two: the nickel-titanium alloy wire is placed in a heating furnace and heated to 800 degrees Celsius to melt it. During the heating process, the nickel-titanium alloy wire needs to be continuously stirred to prevent it from sticking.

[0056] Step three: the molten nickel-titanium alloy wire is cooled into a ball shape. The top material of the high-temperature molten nickel-titanium alloy wire flows downward to form a ball or a ball-like object at the top, thereby obtaining the connecting head 41. The cooling time is 5 minutes, and the diameter of the ball head of the cooled nickel-titanium alloy wire is 2 mm.

[0057] In the embodiment, the connecting head 41 is provided in a ball head structure, and after assembly, the connecting head 41 and the wall surface of the assembly cavity are in abutting contact. During the line drive, the connecting head 41 and the wall surface of the assembly cavity are in force transmission, which can avoid fixed constraints on the elasticity of the driving line 4 and ensure the flexibility of the line drive.

[0058] The line drive connecting structure provided by the utility model has the advantages that the connecting head 41 of the driving line 4 is fixed and limited by the sleeve set 1 and the connecting member, specifically, the assembly cavity for assembling the connecting head 41 of the driving line 4 is established by the accommodating portion 12 on the sleeve set 1 and the connecting member. During assembly, the driving line 4 is first slid through the through hole 21 on the connecting member, and then the connecting head 41 is placed on the side of the connecting member facing the sleeve set 1. Subsequently, the sleeve set 1 and the connecting member are fixed, and the connecting head 41 is placed at the accommodating portion 12, thereby completing the fixation of the connecting head 41 on the driving line 4.

[0059] The line drive connecting structure provided by the utility model has the advantages of simple structure, stable fixation effect, and good practicability, which can arrange the driving line 4 meeting the use requirements of the line drive in the limited volume of the surgical instrument.

[0060] Obviously, the above embodiments are only examples for clearly illustrating the present application and are not intended to limit the present application. Based on the above description, other different forms of changes or variations can be made by those skilled in the art. Here, all the embodiments are not required to be enumerated. The changes or variations derived therefrom are still within the protection scope of the present application.

Claims

1. A wire drive connection structure characterized by, The utility model relates to a kind of line drive connection structure, including: Kit (1), at least one let go (12) is provided on the kit (1); Coupling member, with the kit (1) fixed interface, the through hole (21) is provided on the coupling member, the through hole (21) is correspondingly communicated with the let go (12) arrangement, the coupling member and the let go (12) are jointly configured to form the assembly cavity suitable for the connection head (41) of assembly drive line (4).

2. The wire drive connection structure according to claim 1, characterized by The kit (1) includes a cylindrical wall portion (11), and the let go (12) is recessed on the end surface of the cylindrical wall portion (11) facing the coupling member.

3. The line drive connection structure according to claim 2, characterized by The let go (12) is provided with a plurality of let go (12) annular arrayed on the cylindrical wall portion (11).

4. The wire drive connection structure according to claim 3, characterized by The let go (12) is configured as a square groove or an arc-shaped groove.

5. The wire drive connection structure according to claim 1, characterized by The coupling member includes a coupling seat (2) and a coupling sleeve (3) fixedly spliced, the through hole (21) is provided on the coupling seat (2), the coupling sleeve (3) is provided on the side of the coupling seat (2) close to the kit (1), and the kit (1) is sleeved and installed on the outer side of the coupling sleeve (3).

6. The line drive connection structure according to claim 5, characterized by The coupling sleeve (3) includes a sleeve portion (31), the kit (1) is sleeved on the outer peripheral side of the sleeve portion (31), and the sleeve portion (31) and the kit (1) are provided in interference fit, press-fit, welding or bonding.

7. The line drive connection structure according to claim 6, characterized by The coupling seat (2) is provided with a coupling groove (22), and the coupling groove (22) is recessed on the end surface of the coupling seat (2) facing the kit (1); The coupling sleeve (3) is provided with a coupling protrusion (32), any coupling protrusion (32) is connected to the outer side of the sleeve portion (31), and the coupling protrusion (32) is correspondingly installed in the coupling groove (22);The coupling protrusion (32) and the coupling groove (22) are provided in interference fit, press-fit, welding or bonding.

8. The line drive connection structure according to claim 7, characterized by The coupling protrusion (32) is provided with a plurality of coupling protrusions (32), and the coupling protrusions (32) are annularly distributed on the outer peripheral side of the end portion of the sleeve portion (31) close to the coupling seat (2).

9. A surgical instrument, characterized by The utility model relates to a kind of line drive connection structure, including: Drive line (4) and the line drive connection structure of any one of claims 1-8 are provided with connection head (41) on the end portion of the drive line (4).

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