CN216319409U

CN216319409U - Guide sheath device

Info

Publication number: CN216319409U
Application number: CN202121960126.5U
Authority: CN
Inventors: 黄辉
Original assignee: Hanxin Medical Technology Shenzhen Co ltd
Current assignee: Hanxin Medical Technology Shenzhen Co ltd
Priority date: 2021-08-18
Filing date: 2021-08-18
Publication date: 2022-04-19
Anticipated expiration: 2031-08-18

Abstract

The utility model discloses a guide sheath device, which comprises a guide sheath, wherein a handle is arranged at the near end of the guide sheath, and a bending adjusting mechanism is arranged in the handle; the bending adjusting mechanism comprises a bending adjusting hand wheel, a left bending adjusting and locking assembly and a right bending adjusting and locking assembly, wherein the left bending adjusting and locking assembly is used for enabling the distal end of the guide sheath to bend towards one side, the right bending adjusting and locking assembly is used for enabling the distal end of the guide sheath to bend towards the other side, and the bending adjusting hand wheel is directly connected with the left bending adjusting and locking assembly and the right bending adjusting and locking assembly which can be spirally self-locked through a connecting piece; two groups of traction wires are arranged in the guide sheath in a penetrating manner, the far ends of the two groups of traction wires are respectively fixed at the far ends of the guide sheath, the near ends of the two groups of traction wires are respectively connected with the left bending adjustment locking assembly and the right bending adjustment locking assembly, the bending adjustment hand wheel is rotated to drive the left bending adjustment locking assembly and the right bending adjustment locking assembly to act, one group of traction wires is pulled to enable the far end of the guide sheath to be bent to a preset bending angle, the bending adjustment hand wheel is stopped rotating, and the bending adjustment mechanism is self-locked. The utility model can self-lock after adjustment, has simple operation and convenient adjustment of bending direction.

Description

Guide sheath device

Technical Field

The utility model belongs to the technical field of interventional medical instruments, relates to a guide sheath device, and particularly relates to a guide sheath device.

Background

The traditional surgical operation needs chest opening, extracorporeal circulation and sudden cardiac arrest, so that the risk is high. The minimally invasive interventional operation has the advantages of small wound, easy healing, less complication and the like. With the level of global interventional medicine technology becoming mature, interventional therapy is the preferred modality for many patients. The guide sheath is used as an assistant device for interventional therapy, establishes a channel between the lesion position of a patient and an external operation end, and is widely applied to interventional techniques.

Although related interventional instruments for multi-directional bending adjustment exist in the prior art, due to the fact that only one traction wire cavity corresponds to each direction, bending adjustment force is still too large, and the traction wire is prone to breaking. Then the adjustment of the guide sheath is respectively driven by the disc mechanism and the knob mechanism to adjust each direction to a preset position and then locked by the locking mechanism. So to doctor's operation requirement higher, even when adjusting to the locking again after the correct position, the direction of adjusting before probably is kick-backed by the unblock, and the disc mechanism is adjusted the direction and is made mistakes easily and is mixed, complex operation, greatly increased doctor's operation process burden of using.

SUMMERY OF THE UTILITY MODEL

The utility model aims to solve the technical problem of providing a guide sheath device which can be self-locked after adjustment, is simple to operate and is convenient to adjust the bending direction, aiming at the defects of the prior art.

The technical scheme adopted by the utility model for solving the technical problems is as follows:

a guide sheath device comprises a guide sheath, wherein a handle is arranged at the proximal end of the guide sheath, and a bending adjusting mechanism for adjusting the bending degree and direction of the distal end of the guide sheath is arranged in the handle;

the bending adjusting mechanism comprises a bending adjusting hand wheel, a left bending adjusting and locking assembly and a right bending adjusting and locking assembly, wherein the left bending adjusting and locking assembly is used for enabling the distal end of the guide sheath to bend towards one side, the right bending adjusting and locking assembly is used for enabling the distal end of the guide sheath to bend towards the other side, and the bending adjusting hand wheel is directly connected with the left bending adjusting and locking assembly and the right bending adjusting and locking assembly which can be spirally self-locked through a connecting piece;

two groups of traction wires are arranged in the guide sheath in a penetrating mode, the far ends of the two groups of traction wires are respectively fixed at different positions of the far end of the guide sheath, the near ends of the two groups of traction wires are respectively connected with the left bending adjusting locking assembly and the right bending adjusting locking assembly, the left bending adjusting locking assembly and the right bending adjusting locking assembly are driven to move through adjustment of the bending adjusting hand wheel, one group of traction wires are pulled to enable the far end of the guide sheath to be bent to a preset bending angle, and the bending adjusting mechanism is self-locked under the condition that the bending adjusting hand wheel is not rotated.

Further, in the introducer sheath device, it is preferable that the left-hand bend adjustment locking unit and the right-hand bend adjustment locking unit be disposed in parallel in the handle.

Furthermore, in the guide sheath device, preferably, the connecting piece is a main gear coaxially arranged with the bending adjusting hand wheel, and secondary gears respectively arranged on the left bending adjusting and locking component and the right bending adjusting and locking component; both of the secondary gears are meshed with a primary gear. Preferably, the two secondary gears have the same module.

In the above introducer sheath device, it is preferable that the secondary gear and the primary gear mesh with each other in an inner mesh or an outer mesh.

Furthermore, in the guide sheath device, preferably, a core piece is arranged in the bending adjusting hand wheel in a penetrating manner, the core piece is axially arranged along the handle and fixedly connected with the handle, and the core piece is provided with an axial through inner cavity; the left bending adjustment locking assembly and the right bending adjustment locking assembly are respectively arranged on two sides of the inner core piece.

Further, in the introducer sheath device, it is preferable that the left-handed rotation adjusting and locking assembly includes a left-handed screw member and a left-handed slider engaged with the left-handed screw member; the right-turn adjusting and locking assembly comprises a right-turn screw part and a right-turn sliding block meshed with the right-turn screw part; the thread directions of the left-handed screw part and the right-handed screw part are opposite, so that the left-handed sliding block and the right-handed sliding block perform opposite linear motion; and the left-handed sliding block and the right-handed sliding block are respectively fixed with a group of traction wires.

Further, in the introducer sheath device, the left-handed screw and the right-handed screw are preferably a left-handed screw and a right-handed screw, respectively.

Furthermore, in the introducer sheath device, preferably, the left-turning adjusting and locking assembly includes a left slide rail, a left-turning slide block fitted on the left slide rail, and a left-turning spiral element engaged with the left-turning slide block; the right-turn adjusting and locking assembly comprises a right slide rail, a right-turn slide block matched on the right slide rail and a right-turn spiral part meshed with the right-turn slide block; the left-handed screw part and the right-handed screw part are opposite in thread, and the bending adjusting hand wheel is fixedly connected or connected with the left-handed screw part and the right-handed screw part through a connecting piece to drive the left-handed sliding block and the right-handed sliding block to move reversely.

Furthermore, in the guide sheath device, a spiral cylinder with an integrated structure formed by combining the left-handed spiral part and the right-handed spiral part is preferred, and the spiral cylinder is fixedly connected with a bending adjusting hand wheel; the inner wall of the spiral cylinder is simultaneously provided with left-handed threads and right-handed threads.

Furthermore, in the guide sheath device, preferably, the left-handed screw and the right-handed screw are respectively a left-handed screw cylinder with left-handed threads and a right-handed screw cylinder with right-handed threads, and the left-handed screw cylinder and the right-handed screw cylinder are connected with a bending adjusting hand wheel through a connecting piece.

Further, in the aforementioned introducer sheath device, it is preferable that the left slide rail and the right slide rail are integrally formed.

Further, in the guide sheath device, it is preferable that at least two groups of traction wire cavities are provided in the guide sheath, and the traction wire cavities are not communicated with each other.

Further, in the introducer sheath device, preferably, the handle includes a distal end housing, a middle housing and a proximal end housing, the handle is provided with a through hole penetrating from the distal end to the proximal end, and the bending adjusting hand wheel is arranged at the distal end of the handle between the distal end housing and the middle housing or at the proximal end of the handle between the proximal end housing and the middle housing.

The utility model is provided with two groups of traction wires which are respectively connected to different positions at the far end of the guide sheath and can draw the guide sheath to bend towards different directions. The bending adjusting mechanism controls bending in different directions through the left bending adjusting and locking assembly and the right bending adjusting and locking assembly, and the left bending adjusting and locking assembly and the right bending adjusting and locking assembly are spirally self-locked after bending, so that the adjusting difficulty is reduced, and the bending adjusting angle of the head end of the guide sheath is locked when the operation is stopped. The bending hand wheel can be operated by a single hand, different bending can be realized by left-handed rotation or right-handed rotation conveniently, and the operation is simple, convenient and stable.

Drawings

The utility model will be further described with reference to the accompanying drawings and examples, in which:

FIG. 1 is a schematic view of an external structure of an introducer sheath device according to example 1 of the present invention;

FIG. 2 is a schematic structural view showing the positional relationship between the introducer sheath and the pull wire according to example 1 of the present invention;

FIG. 3 is a cross-sectional view of an introducer sheath according to example 1 of the present invention;

FIG. 4 is an exploded view of the handle and bend adjustment mechanism according to embodiment 1 of the present invention;

FIG. 5 is a schematic structural view of a bending adjustment handle according to embodiment 1 of the present invention;

FIG. 6 is a schematic structural diagram of the positional relationship between the left-handed slider and the right-handed slider and the handle in embodiment 1 of the present invention;

FIG. 7 is a schematic view of the external structure of an introducer sheath device according to example 2 of the present invention;

FIG. 8 is an exploded view of the handle and bend adjustment mechanism according to embodiment 2 of the present invention;

FIG. 9 is a schematic view of the external structure of an introducer sheath device according to example 3 of the present invention;

FIG. 10 is an exploded view of the handle and bend adjustment mechanism of embodiment 3 of the present invention;

fig. 11 is a schematic structural view of the positional relationship between the left-hand slider and the right-hand slider and the handle in embodiment 3 of the present invention.

Detailed Description

For a more clear understanding of the technical features, objects and effects of the present invention, embodiments of the present invention will now be described in detail with reference to the accompanying drawings.

An element is said to be "secured to" or "disposed on" another element, either directly or indirectly on the other element. When an element is referred to as being "connected to" another element, it can be directly or indirectly connected to the other element.

The terms "upper", "lower", "left", "right", "front", "rear", "vertical", "horizontal", "top", "bottom", "inner", "outer", and the like indicate orientations or positions based on the orientations or positions shown in the drawings, and are for convenience of description only and not to be construed as limiting the technical solution. The terms "first", "second", etc. are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features. The meaning of "plurality" is two or more unless specifically limited otherwise.

The terms "proximal", "distal", "proximal" and "distal" are used with reference to an operator, with the term "distal" being used with respect to the operator and the term "proximal" being used with respect to the operator.

As shown in fig. 1 to 11, an introducer sheath device comprises an introducer sheath 100, a handle 200 is arranged at the proximal end of the introducer sheath 100, and a bending adjusting mechanism 300 for adjusting the bending degree and direction of the distal end of the introducer sheath 100 is arranged in the handle 200; the bending adjusting mechanism 300 comprises a bending adjusting hand wheel 310, a right bending adjusting and locking assembly 330 for bending the distal end of the introducer sheath 100 to one side and a left bending adjusting and locking assembly 340 for bending the distal end of the introducer sheath 100 to the other side, wherein the bending adjusting hand wheel 310 is connected with the right bending adjusting and locking assembly 330 and the left bending adjusting and locking assembly 340 which can be spirally self-locked directly or through a connecting piece; two groups of traction wires 110 are arranged in the guiding sheath 100 in a penetrating manner, the far ends of the two groups of traction wires 110 are respectively fixed at different positions of the far end of the guiding sheath 100, the near ends of the two groups of traction wires 110 are respectively connected with the right bending adjustment locking assembly 330 and the left bending adjustment locking assembly 340, the bending adjustment hand wheel 310 is rotated to drive the right bending adjustment locking assembly 330 and the left bending adjustment locking assembly 340 to move, one group of traction wires 110 is pulled to enable the far end of the guiding sheath 100 to be bent to a preset bending angle, the bending adjustment hand wheel 310 is stopped rotating, and the bending adjustment mechanism 300 is self-locked.

The introducer sheath 100 of the present invention is divided into the following sections: the introducer sheath 100, the handle 200, and the control mechanism disposed in the handle 200 include a bending control mechanism, and other control mechanisms are set according to the function of the introducer sheath 100, which may be implemented by the prior art and are not described herein again.

The introducer sheath 100 is made of a polymer material or a metal material. The distal end of the guiding sheath 100 can be freely bent within a certain angle range and actively returns to the initial angle direction, the distal end of the guiding sheath 100 is provided with an arc-shaped end with a smooth surface, and the arc-shaped end is used for reducing the damage of the distal end of the guiding sheath 100 to the inner wall of the blood vessel of the human body. The introducer sheath 100 is provided with at least one delivery lumen 105 and at least two sets of pull wire lumens 104, preferably the pull wire lumens 104 are not in communication with each other. The delivery lumen 105 extends completely through the introducer sheath 100 from the distal end of the introducer sheath 100 to the proximal end of the introducer sheath 100. The pull wire lumen 104 is embedded within the wall of the introducer sheath 100.

As shown in fig. 2-3, each group of the pulling wires 110 includes 1-3 pulling wires, the distal ends of the pulling wires 110 can be directly fixed on the guiding sheath 100 by knotting or clipping, or the pulling wires 110 can be fixed by providing an anchoring ring, the number of the pulling wire cavities 104 can be greater than, less than or equal to the number of the pulling wires 110, and preferably the two numbers are the same. Each pull wire 110 is inserted into each pull wire lumen 104 or a plurality of pull wires 110 are inserted into one pull wire lumen 104, and after passing out of the proximal end of the introducer sheath 100 along the pull wire lumen 104, each set of pull wires 110 is connected to the right-bend adjustment locking assembly 330 and the left-bend adjustment locking assembly 340 in the handle 200.

The handle 200 is disposed at the proximal end of the introducer sheath 100 for providing a control mechanism, and the bend adjustment mechanism 300 of the present invention is disposed in the handle 200.

As shown in fig. 4, the handle 200 includes a distal housing 210, a middle housing 220 and a proximal housing 230, the handle 200 is provided with a through hole from the distal end to the proximal end, and the bending handwheel 310 is disposed at the proximal end or the distal end of the handle 200. Specifically, the bending handwheel 310 may be disposed on the distal end housing 210 or the proximal end housing 230, or on the distal end of the handle 200 between the distal end housing 210 and the middle housing 220, or the bending handwheel 310 may be disposed on the proximal end of the handle 200 between the proximal end housing 230 and the middle housing 220. More preferably, the bending handwheel 310 is disposed at the distal end of the handle 200, i.e. between the distal housing 210 and the middle housing 220 or on the distal housing 210, and this position enables the operator to directly operate the bending handwheel 310 with fingers while holding the handle 200, thereby realizing one-handed operation. The handle 200 may also be a structure formed by buckling an upper shell and a lower shell as shown in fig. 8 and 10, and the bending regulating handwheel 310 is directly arranged at the far end of the handle 200.

The proximal end of the handle 200 is provided with a cover 240 for closing the rear end of the handle 200, and the center of the cover 240 is provided with a through hole 241 for leading out a guide wire.

The bending adjusting mechanism 300 comprises a bending adjusting hand wheel 310, a right bending adjusting locking component 330 and a left bending adjusting locking component 340, wherein the bending adjusting hand wheel 310 is fixed on the handle 200, the bending adjusting hand wheel 310 comprises a wheel body 311 and a central shaft 312, the central shaft 312 of the bending adjusting hand wheel 310 is provided with a through hole 3111 which is communicated with the through hole 270 of the handle 200 and used for threading and installing a guide wire, a traction wire and the like. The right bending adjustment locking assembly 330 and the left bending adjustment locking assembly 340 are fixedly connected with the central shaft 312 of the bending hand wheel 310 or connected through the connecting piece 320.

The connecting piece 320 is a main gear 321 coaxially arranged with the bending adjusting hand wheel 310, and secondary gears 322 respectively arranged on the right bending adjusting locking component 330 and the left bending adjusting locking component 340; both said secondary gears 322 are in mesh with the main gear 321, preferably both secondary gears 322 having the same module. When the pull wire is pulled by the right curve adjustment locking assembly 330, the corresponding left curve adjustment locking assembly 340 simultaneously loosens the pull wire and the two secondary gears 322 have the same modulus so that both are tightened and loosened to the same degree to ensure that one is not counter-blocked from motion by the other when pulled. The main gear 321 of the connecting member 320 is fixed on the central shaft 312 of the bending handwheel 310, and the two are coaxially arranged, and the main gear 321 has two embodiments: one is that the main gear 321 is an external gear, the other is that the main gear 321 is an internal gear, and the engagement between the sub-gear 322 and the main gear 321 is formed as an internal or external engagement.

The utility model adopts an engagement (thread) mode to realize adjustment and self-locking, in order to simplify the structure and realize synchronous action, the right bending adjustment locking component 330 and the left bending adjustment locking component 340 are required to be arranged in the handle 200 in parallel, two secondary gears 322 connected with the right bending adjustment locking component 330 and the left bending adjustment locking component 340 are simultaneously engaged with the main gear 321 to drive the right bending adjustment locking component 330 and the left bending adjustment locking component 340 to simultaneously act, and the connection mode is simple and reliable, and the structural arrangement in the handle is optimized.

Further, a core member 250 is inserted into the bending adjustment handwheel 310, the core member 250 is axially arranged along the handle 200 and fixedly connected with the handle 200, and the core member 250 is provided with an axial through inner cavity 251; the right-hand bend adjustment locking assembly 330 and the left-hand bend adjustment locking assembly 340 are disposed on both sides of the core member 250.

There are various embodiments of the right bend adjustment locking assembly 330 and the left bend adjustment locking assembly 340:

the first embodiment is as follows: as shown in fig. 4 and 8, the right bending adjustment locking assembly 330 includes a right-handed screw 331, a right-handed slider 332 engaged with the right-handed screw 331; the left bending adjustment locking assembly 340 comprises a left-handed screw 341, a left-handed slider 342 engaged with the left-handed screw 341; the right-handed screw 331 and the left-handed screw 341 have opposite screw directions, so that the right-handed slider 332 and the left-handed slider 342 perform opposite linear motions; the right-handed slider 332 and the left-handed slider 342 are respectively fixed with a group of traction wires 110.

Preferably, the right-handed screw 331 and the left-handed screw 341 are right-handed screw and left-handed screw, respectively.

The second embodiment is as follows: as shown in fig. 10, the right bending adjustment locking assembly 330 includes a right slide rail 333, a right-handed slider 332 fitted on the right slide rail 333, and a right-handed screw 331 engaged with the right-handed slider 332; the left bending adjustment locking assembly 340 comprises a left sliding rail 343, a left-handed slider 342 fitted on the left sliding rail 343, and a left-handed screw 341 engaged with the left-handed slider 342; the threads of the right-handed screw 331 are opposite to those of the left-handed screw 341, and the bending hand wheel 310 is fixedly connected or connected with the right-handed screw 331 and the left-handed screw 341 through the connecting piece 320 to drive the right-handed slider 332 and the left-handed slider 342 to move in opposite directions.

Further, the right-handed screw 331 and the left-handed screw 341 are combined into a screw cylinder of an integral structure, and the screw cylinder is fixedly connected with the bending adjusting hand wheel 310; the inner wall of the spiral cylinder is simultaneously provided with left-handed threads and right-handed threads.

In other embodiments, the right-handed screw 331 and the left-handed screw 341 are a right-handed screw cylinder and a left-handed screw cylinder, respectively, and are connected to the bending adjustment handwheel 310 through the connection member 320. The right slide rail 333 and the left slide rail 343 are integrated.

Specifically, the present invention is illustrated in detail by the following specific examples:

embodiment 1, as shown in fig. 1 to 6, an introducer sheath device comprises an introducer sheath 100, a handle 200 is arranged at the proximal end of the introducer sheath 100, and a bending adjusting mechanism 300 is arranged in the handle 200; the bending adjustment mechanism 300 comprises a bending adjustment handwheel 310, a right bending adjustment locking assembly 330 for bending the distal end of the introducer sheath 100 to one side, and a left bending adjustment locking assembly 340 for bending the distal end of the introducer sheath 100 to the other side.

As shown in fig. 1 to 3, the guiding sheath 100 is made of a polymer material, the distal end of the guiding sheath 100 can be made flexible, i.e. free bending is achieved, and the distal end of the guiding sheath 100 is provided with an arc-shaped end with a smooth surface to reduce the damage of the distal end of the guiding sheath 100 to the inner wall of the blood vessel of the human body. The introducer sheath 100 of this embodiment is provided with a delivery lumen 105 and two sets of pull wire lumens 104, each set of two pull wire lumens 104, the pull wire lumens 104 being non-communicating with each other, the delivery lumen 105 extending completely through the distal end of the introducer sheath 100 to the handle 200 at the proximal end of the introducer sheath 100. The pull wire lumen 104 is embedded in the wall of the introducer sheath 100, and the pull wire 110 is inserted into the pull wire lumen 104, and the distal end thereof is fixed to the distal end of the introducer sheath 100, and is connected to the right-hand bend adjustment locking assembly 330 and the left-hand bend adjustment locking assembly 340 in the handle 200 after passing out of the proximal end of the introducer sheath 100 along the pull wire lumen 104. The guide sheath 100 is a multi-layer composite tube body, and comprises an inner lining tube 103 and an outer tube 102 which are mutually attached and sleeved, wherein a reinforcing layer 101 is arranged outside the outer tube 102 and used for reinforcing the strength of the tube body. The pull wire lumen 104 is embedded between the inner lining tube 103 and the outer tube 102 of the introducer sheath 100.

As shown in fig. 1 and 4, a handle 200 is provided at the proximal end of the introducer sheath 100 for providing a control mechanism, and a bend adjusting mechanism 300 of the present invention is provided in the handle 200. Specifically, the handle 200 comprises a distal housing 210, a middle housing 220 and a proximal housing 230, which are fastened together, the handle 200 is provided with a through hole 270 extending from the distal end to the proximal end, the proximal end of the handle 200 is provided with a cover 240 for closing the rear end of the handle 200, and the center of the cover 240 is provided with a through hole 241 for passing out a guide wire. The distal housing 210, the middle housing 220, and the proximal housing 230 are all formed by a two-part snap fit.

The bending adjustment hand wheel 310 is arranged at the far end of the handle 200 between the far end shell 210 and the middle shell 220, so that an operator can directly operate the bending adjustment hand wheel 310 through fingers while holding the handle 200, and single-hand operation is realized.

The bending adjusting mechanism 300 comprises a bending adjusting hand wheel 310, a right bending adjusting locking assembly 330 and a left bending adjusting locking assembly 340, wherein the bending adjusting hand wheel 310 is fixed on the handle 200, and specifically, as shown in fig. 5-6, a central shaft 312 of the bending adjusting hand wheel 310 is provided with a circle of limiting grooves 3121, and is limited on the handle 200 only by limiting ribs 290 arranged on the inner wall of the handle 200.

The main gear 321 is coaxially arranged on the central shaft 312 of the bending hand wheel 310, and the main gear 321 is integrally or fixedly connected with the central shaft 312 or meshed through a connecting gear. The main gear 321 is an external gear that meshes with two secondary gears 322, and the two secondary gears 322 have the same module, so that the right and left roll

adjustment locking assemblies

330 and 340 are synchronized.

The bending regulating handwheel 310 is internally provided with the core member 250 in a penetrating way, the core member 250 is of a tubular structure, the core member 250 is axially arranged along the handle 200 and is fixedly connected with the handle 200, namely, the core member 250 penetrates through a central shaft 312 of the bending regulating handwheel 310 and the main gear 321 and is fixedly connected with the far-end shell 210 of the handle 200. The core member 250 is provided with an axial through inner cavity 251, and a guide wire is threaded in the inner cavity 251; the right-hand bend adjustment locking assembly 330 and the left-hand bend adjustment locking assembly 340 are provided on both sides of the core member 250, respectively.

In this embodiment, the right-handed screw 331 of the right-handed adjusting locking component 330 is a right-handed screw, the left-handed screw 341 is a left-handed screw, the left-handed screw and the right-handed screw are supported and fixed in a limited manner by a limiting rib 260 disposed on the inner wall of the handle 200, and after the handle 200 is fastened, the left-handed screw and the right-handed screw are fixed in the handle 200 in a limited manner by the limiting rib 260 and are only rotated without being separated. The left-handed screw and the right-handed screw are respectively arranged at two sides of the inner core piece 250. The right-handed slider 332 and the left-handed slider 342 are provided with a connecting hole 3321 for fixing the proximal end of the pull wire 110, and the pull wire 110 is driven when the right-handed slider 332 and the left-handed slider 342 move. The right-handed screw 331, the left-handed screw 341 and the secondary gear 322 may be connected in various ways, one is fixed connection, the other is profile connection, the embodiment adopts profile connection, that is, the ends of the right-handed screw 331 and the left-handed screw 341 are provided with square heads, the center of the secondary gear 322 is provided with a square hole, and the two are inserted.

As shown in fig. 6, a guide groove 280 is formed on the inner wall of the handle 200, and bosses 360 are provided on the lower portions of the right-handed slider 332 and the left-handed slider 342, and the bosses 360 are engaged with the guide groove 280 to slide.

The right-handed screw 331 and the left-handed screw 341 have opposite screw direction (the screw thread is left-handed or right-handed), the right-handed slider 332 engaged with the right-handed screw 331 and the left-handed slider 342 engaged with the left-handed screw 341 slide in opposite directions, when the bending handwheel 310 is rotated left, the main gear 321 is driven by the secondary gear 322, the right-handed screw 331 rotates left, the left-handed screw 341 rotates right, the right-handed slider 332 moves towards the proximal end, the left-handed slider 342 moves towards the distal end, the pull wire 110 connected with the right-handed slider 332 is pulled towards the proximal end, the pull wire 110 connected with the left-handed slider 342 is loosened, the distal end of the guiding sheath 100 bends towards the left side, after reaching the bending angle, the bending handwheel 310 stops being pulled, the right-handed slider 332 and the left-handed slider 342 respectively stop on the right-handed screw 331 and the left-handed screw 341, the screw is locked spirally, that is to lock the distal end of the guiding sheath 100 without rotating the bending handwheel 310, the degree and direction of bending does not change. The bending handwheel 310 is turned right, the bending direction of the guide sheath 100 is opposite, and the guide sheath is locked to the adjusted bending angle.

In this embodiment, each component may be made of a hard polymer material or a machined metal material, and the hard polymer material is preferable in order to reduce the weight of the handle 200 itself.

Embodiment 2, as shown in fig. 7 to 8, this embodiment is an improvement based on embodiment 1, and is specifically improved in that an external gear is provided on the main gear 321, instead of an internal gear with teeth on the inner side, and the sub-gear 322 is an external gear and is fitted into the main gear 321. And the core member 250 passes through the main gear 321, and two sub-gears 322 are respectively provided on both sides of the core member 250.

The rest of the structure is the same as that of embodiment 1, and is not described herein again.

Embodiment 3, as shown in fig. 9-11, this embodiment is an improvement on the basis of embodiment 1, and the specific improvements are as follows:

unlike the embodiment 1-2 in which the rotating components are located at the center of rotation, the rotating components of the embodiment, namely the right-handed screw 331 and the left-handed screw 341, rotate around the right-handed slider 332 and the left-handed slider 342 at the outer periphery, and drive the two to move linearly.

The right-handed screw 331 and the left-handed screw 341 may be connected to the bending hand wheel 310 by directly fixedly connecting the right-handed bending adjusting locking assembly 330 and the left-handed bending adjusting locking assembly 340 to the bending hand wheel 310 without using the connecting member 320 as shown in fig. 10. A fixed disc 313 is arranged on the central shaft 312 of the bending hand wheel 310, and the right bending adjustment locking component 330 and the left bending adjustment locking component 340 are connected with the fixed disc 313. In other embodiments, the right-handed screw 331 and the left-handed screw 341 may be connected to the bending handwheel 310 by the connecting member 320.

Specifically, the right bending adjustment locking assembly 330 includes a right slide rail 333, a right-handed slider 332 fitted on the right slide rail 333, and a right-handed screw 331 engaged with the right-handed slider 332; the left bending adjustment locking assembly 340 comprises a left sliding rail 343, a left-handed slider 342 fitted on the left sliding rail 343, and a left-handed screw 341 engaged with the left-handed slider 342; the threads of the right-handed screw 331 are opposite to those of the left-handed screw 341, and the bending hand wheel 310 is fixedly connected with the right-handed screw 331 and the left-handed screw 341 to drive the right-handed slider 332 and the left-handed slider 342 to move in opposite directions.

Further, as shown in fig. 10-11, the right-handed screw 331 and the left-handed screw 341 are combined into a screw cylinder of an integral structure, and the screw cylinder is fixedly connected with the bending adjustment handwheel 310; the inner wall of the spiral cylinder is simultaneously provided with left-handed threads and right-handed threads. The spiral cylinder is sleeved outside the right sliding rail 333 and the left sliding rail 343, and the right-handed sliding block 332 and the left-handed sliding block 342 are in sliding fit with the right sliding rail 333 and the left sliding rail 343 and are driven to move by being engaged with threads on the inner wall of the spiral cylinder. The right-handed slider 332 is engaged with the left-handed thread, and the left-handed slider 342 is engaged with the right-handed thread, so that the right-handed slider 332 and the left-handed slider 342 are arranged on two sides of the core member 250, do not interfere with each other and slide in opposite directions. The right slide rail 333 and the left slide rail 343 may be independently provided or may be an integrated structure. Because the core member 250 is provided, the right slide rail 333 and the left slide rail 343 may be provided on both sides of the core member 250, or may be integrated with the core member 250, i.e. the side surface of the core member 250 is provided with the long groove 252, and the right-handed slider 332 and the left-handed slider 342 are provided with the protruding block 360, which is fitted to slide in the long groove 252.

In other embodiments, the right-handed screw 331 and the left-handed screw 341 are a left-handed screw cylinder with left-handed threads and a right-handed screw cylinder with right-handed threads, respectively, and are connected to the bending adjustment handwheel 310 through the connecting member 320.

In addition, the handle 200 of the present embodiment is axially integrated and is formed by fastening two parts, namely, an upper part and a lower part.

Claims

1. A guide sheath device comprises a guide sheath, wherein a handle is arranged at the proximal end of the guide sheath, and the handle is internally provided with a bending adjusting mechanism for adjusting the bending degree and direction of the distal end of the guide sheath;

2. The introducer sheath apparatus of claim 1, wherein the left and right bend adjustment locking assemblies are juxtaposed within the handle.

3. The introducer sheath apparatus as claimed in claim 1, wherein the connecting member is a main gear coaxially disposed with the bending adjustment hand wheel, and secondary gears respectively disposed on the left bending adjustment locking assembly and the right bending adjustment locking assembly; both of the secondary gears are meshed with a primary gear.

4. The introducer sheath apparatus of claim 3, wherein the engagement between the secondary gear and the primary gear is an internal or external engagement.

5. The introducer sheath device as claimed in claim 1, wherein a core member is inserted into the bending regulating hand wheel, the core member is axially arranged along the handle and fixedly connected with the handle, and the core member is provided with an axially through inner cavity; the left bending adjustment locking assembly and the right bending adjustment locking assembly are respectively arranged on two sides of the inner core piece.

6. The introducer sheath device of any one of claims 1-5, wherein the left curve adjustment locking assembly comprises a left-handed screw member, a left-handed slider engaged with the left-handed screw member; the right-turn adjusting and locking assembly comprises a right-turn screw part and a right-turn sliding block meshed with the right-turn screw part; the thread directions of the left-handed screw part and the right-handed screw part are opposite, so that the left-handed sliding block and the right-handed sliding block perform opposite linear motion; and the left-handed sliding block and the right-handed sliding block are respectively fixed with a group of traction wires.

7. The introducer sheath device of claim 6, wherein the left-handed and right-handed screws are left-handed and right-handed screws, respectively.

8. The introducer sheath apparatus of any one of claims 1-5, wherein the left bend adjustment locking assembly comprises a left slide rail, a left turn slider engaged on the left slide rail, and a left turn screw engaged with the left turn slider; the right-turn adjusting and locking assembly comprises a right slide rail, a right-turn slide block matched on the right slide rail and a right-turn spiral part meshed with the right-turn slide block; the left-handed screw part and the right-handed screw part are opposite in thread, and the bending adjusting hand wheel is fixedly connected or connected with the left-handed screw part and the right-handed screw part through a connecting piece to drive the left-handed sliding block and the right-handed sliding block to move reversely.

9. The introducer sheath device as claimed in claim 8, wherein the left-handed screw and the right-handed screw are combined into a screw cylinder of an integral structure, and the screw cylinder is fixedly connected with the bending adjusting hand wheel; the inner wall of the spiral cylinder is simultaneously provided with left-handed threads and right-handed threads.

10. The introducer sheath device as claimed in claim 8, wherein the left-handed screw and the right-handed screw are a left-handed screw cylinder with left-handed screw and a right-handed screw cylinder with right-handed screw, respectively, and are connected with the bending adjusting handwheel through a connecting piece.

11. The introducer sheath device of claim 8, wherein the left rail and the right rail are of a unitary construction.

12. The introducer sheath device of any one of claims 1-5, wherein at least two sets of pull wire lumens are provided in the introducer sheath, the pull wire lumens not being in communication with each other.

13. The introducer sheath device as claimed in claim 1, wherein the handle comprises a distal housing, a middle housing and a proximal housing, the handle is provided with a through hole penetrating from the distal end to the proximal end, and the bending adjustment hand wheel is arranged at the distal end of the handle between the distal housing and the middle housing or at the proximal end of the handle between the proximal housing and the middle housing.