CN110664525A

CN110664525A - Handle assembly of support conveyor, support conveyor and support conveying system

Info

Publication number: CN110664525A
Application number: CN201810709857.9A
Authority: CN
Inventors: 张军强
Original assignee: Lifetech Scientific Shenzhen Co Ltd
Current assignee: Lifetech Scientific Shenzhen Co Ltd
Priority date: 2018-07-02
Filing date: 2018-07-02
Publication date: 2020-01-10

Abstract

The invention relates to a handle assembly of a support conveyor, which comprises a fixed handle and a movable handle, and further comprises a locking device, wherein the locking device comprises a locking positioning piece and a return piece; the return piece is arranged on the fixed handle, one end of the locking positioning piece is connected with the return piece, and the other end of the locking positioning piece is movably connected with the movable handle; or the return piece is arranged on the movable handle, one end of the locking positioning piece is connected with the return piece, and the other end of the locking positioning piece is movably connected with the fixed handle; the return piece is used for controlling the locking positioning piece to be connected with or separated from the movable handle so as to enable the fixed handle to be connected with the movable handle or enable the fixed handle to be separated from the movable handle. The handle assembly of the stent delivery device can prevent the stent from being released and opened in advance.

Description

Handle assembly of support conveyor, support conveyor and support conveying system

Technical Field

The invention relates to the field of interventional medical instruments, in particular to a handle assembly of a stent conveyor, the stent conveyor and a stent conveying system.

Background

In recent years, interventional therapy for cardiovascular diseases has become an important approach. With the continuous development of interventional technology, the advantages of using lumen stents (such as covered stents) to treat aortic aneurysms and arterial dissection diseases are prominent day by day. The covered stent is an artificial blood vessel which is adaptive to the size of the blood vessel and mainly comprises a covered membrane and a stent for supporting the covered membrane, wherein the covered membrane is generally made of terylene or expanded polytetrafluoroethylene (e-PTFE) membrane, and the supporting stent is mainly woven by stainless steel wires or nickel-titanium alloy wires. The use process of the covered stent is that the covered stent is firstly compressed into a sheath canal cavity of a stent conveyor, then a blood vessel is generally punctured at the position of a femoral artery or an iliac artery, a guide wire is utilized to establish a track, then the conveyor establishes a conveying path through the iliac artery, an abdominal aorta, a thoracic aorta, an aortic arch and an ascending aorta, then the conveying path is conveyed to a lesion appointed position, finally the covered stent is released, the covered stent is released and opened to be tightly attached to the wall of an aneurysm, a covering film of the covered stent isolates blood flow from a lesion part, the impact of the blood flow on the aneurysm wall of the lesion part is eliminated, a channel for normal circulation of the blood is established, and then the guide wire and the conveyor are withdrawn, so that the intervention.

The common stent conveyor consists of a sheath core tube, an outer sheath tube, a fixed handle, a movable handle and the like. The covered stent is conveyed into a human blood vessel by a stent conveyor, after the covered stent is positioned at the position of the pathological change of the blood vessel, the outer sheath tube is driven to retreat by the axial separation of the movable handle and the fixed handle, so that the covered stent is released and opened. For most of stent conveyors, the fixed handle and the movable handle are only in a plane contact state when the stent graft is not released, and the stent graft is difficult to be released and opened in advance due to relative separation of the movable handle and the fixed handle caused by jolt in the transportation and storage processes of a stent conveying system. Meanwhile, in the clinical operation process, the condition that the movable handle and the fixed handle are separated in advance due to unreasonable operation of a doctor is difficult to avoid, so that the covered stent is released and opened in advance, and the product is invalid.

Disclosure of Invention

In view of the above, there is a need for a handle assembly for a rack carrier that avoids premature release of the rack and product failure.

A handle assembly of a support conveyor comprises a fixed handle and a movable handle, and further comprises a locking device, wherein the locking device comprises a locking positioning piece and a return piece;

the return piece is arranged on the fixed handle, one end of the locking positioning piece is connected with the return piece, and the other end of the locking positioning piece is movably connected with the movable handle; or the return piece is arranged on the movable handle, one end of the locking positioning piece is connected with the return piece, and the other end of the locking positioning piece is movably connected with the fixed handle;

the return piece is used for controlling the locking positioning piece to be connected with or separated from the movable handle so as to enable the fixed handle to be connected with the movable handle or enable the fixed handle to be separated from the movable handle.

In one embodiment, the return member is an elastic member, the locking and positioning member is separated from the movable handle when the elastic member is compressed, and the locking and positioning member is connected with the movable handle when the elastic member is returned.

In one embodiment, the fixed handle comprises a fixed shell and a supporting piece, the fixed shell is enclosed to form an accommodating cavity, the supporting piece is arranged in the accommodating cavity, a key window is formed in the fixed shell, the bottom of the return piece is arranged on the supporting piece, the top of the return piece is opposite to the key window, and the side wall of the return piece is connected with one end, far away from the movable handle, of the locking positioning piece.

In one embodiment, the movable handle comprises a movable shell and a movable clamping piece, the movable shell encloses a cavity, the movable clamping piece is arranged on the inner wall of the movable shell, and one end of the locking positioning piece, which is far away from the return piece, is movably connected with the movable clamping piece so as to connect the fixed handle with the movable handle or separate the fixed handle from the movable handle;

or, fixed handle includes fixed casing and fixed fastener, fixed casing encloses into accepts the chamber, fixed fastener set up in on the inner wall of fixed casing, keeping away from of locking setting element the one end of returning the position piece with fixed fastener swing joint and make fixed handle with the movable handle is connected, or makes fixed handle with the separation of movable handle.

In one embodiment, the movable engaging member is a protruding block disposed on an inner wall of the movable housing, the fixed engaging member is a protruding block disposed on an inner wall of the fixed housing, a blocking portion is disposed at an end of the locking positioning member away from the return member, and the return member is configured to control the blocking portion to engage with the protruding block or control the blocking portion to separate from the protruding block.

In one embodiment, the blocking part is a protrusion arranged at one end of the locking positioning piece far away from the return piece, and the protrusion is clamped or separated from the protrusion to enable the fixed handle to be connected or separated from the movable handle;

or the blocking part is a clamping groove formed in one end, far away from the return piece, of the locking positioning piece, and the clamping groove is clamped with or separated from the protruding block to enable the fixed handle to be connected with or separated from the movable handle.

In one embodiment, the protrusion surrounds a longitudinal central axis of the movable housing.

In one embodiment, the locking device further comprises a return connection member connected to the return member.

In one embodiment, the return connecting piece is a hollow structure which is surrounded by side walls and has at least one open end, a blocking piece is arranged at the top of the side wall of the return connecting piece, and one end of the locking positioning piece is connected with the side wall of the return connecting piece;

the return piece is arranged in the return connecting piece in a penetrating mode, the top of the return piece is abutted to the blocking piece, and the bottom of the return piece extends out of the opening end of the return connecting piece and is connected with the fixed handle;

or the return connecting piece is partially arranged in the return piece in a penetrating mode, the top of the return piece is abutted to the blocking piece, and one end, far away from the return connecting piece, of the return piece is connected with the fixed handle.

In one embodiment, the locking device further comprises a key, and the key drives the return piece to control the locking positioning piece to be separated from the movable handle.

The utility model provides a support conveyer, includes sheath core pipe and outer sheath pipe, the sheath pipe box is located on the sheath core pipe, but outer sheath pipe relative sheath core pipe axial sliding, just sheath core pipe with the sheath pipe encloses into the holding chamber, its characterized in that, support conveyer still includes the handle components of above-mentioned support conveyer, outer sheath pipe axial wears to establish in fixed handle and the movable handle, just outer sheath pipe with movable handle fixed connection.

The stent conveying system comprises a lumen stent and the stent conveyor, wherein the lumen stent is accommodated in the accommodating cavity.

The handle assembly of the support conveyor comprises the locking positioning piece and the return piece, the return piece is used for controlling the locking positioning piece to be connected with or separated from the movable handle, so that the fixed handle is connected with or separated from the movable handle, the movable handle and the fixed handle can be prevented from being released and opened in advance due to relative separation caused by jolting and other reasons in the transportation and storage processes of the support conveying system, and the failure of a product before use is avoided.

Drawings

FIG. 1 is a schematic diagram of a stent delivery system according to one embodiment;

FIG. 2 is a schematic exterior view of a stent transporter of the stent transport system shown in FIG. 1;

FIG. 3 is an enlarged view of a portion of FIG. 1;

FIG. 4 is a schematic structural view of a movable handle of the stent delivery system shown in FIG. 1;

FIG. 5 is a schematic view of the guide rod of the stent delivery system of FIG. 1;

FIG. 6 is a schematic view of a portion of the locking device of the stent delivery system shown in FIG. 1;

FIG. 7 is a schematic structural view of a locking device of another embodiment of the stent delivery system;

FIG. 8 is a schematic structural view of a locking device of a stent delivery system according to still another embodiment;

fig. 9 is a schematic structural view of a luminal stent of a stent delivery system of yet another embodiment in a semi-released state.

Detailed Description

In order to make the aforementioned objects, features and advantages of the present invention comprehensible, embodiments accompanied with figures are described in detail below. In the following description, numerous specific details are set forth in order to provide a thorough understanding of the present invention. This invention may, however, be embodied in many different forms and should not be construed as limited to the embodiments set forth herein, but rather should be construed as broadly as the present invention is capable of modification in various respects, all without departing from the spirit and scope of the present invention.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention.

In the field of interventional medical devices, the "distal end" is defined as the end that is distal from the operator during the procedure, and the "proximal end" is defined as the end that is proximal to the operator during the procedure. "axial" refers to a direction parallel to the line joining the centers of the distal and proximal ends of the medical device, and "radial" refers to a direction perpendicular to the axial direction.

Referring to fig. 1, one embodiment of a stent delivery system 100 includes a luminal stent 1 and a stent transporter 2.

The luminal stent 1 comprises a supporting framework and a covering film covering the supporting framework. The tectorial membrane cladding forms the lumen structure on supporting the skeleton.

Referring to fig. 1 and 2 together, the stent transporter 2 includes a sheath and core tube 20, an outer sheath tube 30, and a handle assembly 90 of the stent transporter. The sheath core tube 20 and the outer sheath tube 30 are both hollow tubular members. The outer sheath tube 30 is sleeved on the sheath core tube 20, and the outer sheath tube 30 and the sheath core tube 20 are coaxial. Also, the outer sheath 30 is axially slidable relative to the sheath core tube 20. The outer sheath tube 30 and the sheath core tube 20 enclose an annular accommodating cavity 40, and the lumen stent 1 is accommodated in the annular accommodating cavity 40.

In the present embodiment, the sheath-core tube 20 has a diameter-variable structure. Referring to fig. 2, the sheath-core tube 20 includes a first inner tube 21 and a second inner tube 22 fixedly connected to a proximal end of the first inner tube 21. The first inner tube 21 and the second inner tube 22 are both hollow tubular members. The first inner tube 21 is a tubular structure with an equal diameter, the second inner tube 22 is also a tubular structure with an equal diameter, and the outer diameter of the first inner tube 21 is smaller than that of the second inner tube 22. In one embodiment, the inner diameter of the first inner tube 21 and the inner diameter of the second inner tube 22 are equal. In this embodiment, the sheath-core tube 20 may be formed by integral molding. In other embodiments, the inner diameter of the first inner tube 21 is smaller than the inner diameter of the second inner tube 22, and the second inner tube 22 is sleeved and fixed on the proximal end of the first inner tube 21. The second inner tube 22 may be secured to the proximal end of the first inner tube 21 by bonding, welding, or the like.

The sheath core tube 20 is provided with a variable diameter structure, so that the second inner tube 22 can form a better support for the outer sheath 30 in the region of the outer sheath 30 not covering the lumen stent 1, so as to prevent the outer sheath 30 from being bent.

Further, the stent transporter 2 further comprises a guide head 10, and the guide head 10 is a conical hollow cavity structure. The guide heads 10 are preferably TIP guide heads to provide better compliance of the guide heads 10. The proximal end of the guide head 10 is an open end, the distal end of the sheath core tube 20 extends into the guide head 10 from the proximal end of the guide head 10 and is fixedly connected with the guide head 10, and the cavity of the sheath core tube 20 is communicated with the cavity of the guide head 10 to form a guide wire channel, so that the stent conveyor 2 can smoothly enter a blood vessel under the guide of a guide wire.

The handle assembly 90 of the rack carrier includes a fixed handle 50, a movable handle 60, a guide bar 70, and a locking device 80.

The fixed handle 50 includes a fixed housing 51 and a support 52 provided inside the fixed housing 51. The fixed housing 51 encloses a housing chamber 511 with both ends open. The support member 52 is located at the proximal end of the housing 511.

Referring to fig. 3, in the present embodiment, the supporting member 52 includes a connecting plate 521 and a supporting plate 522 connected to the connecting plate 521. An end of the connecting plate 521 remote from the supporting plate 522 is fixedly connected to the top wall of the fixed housing 51, and the supporting plate 522 is fixedly connected to an end of the connecting plate 521 remote from the top wall of the fixed housing 51. Also, the support plate 522 is perpendicular to the connection plate 521, and the support plate 522 is parallel to the longitudinal center axis of the fixed housing 51. The connecting plate 521 and the support plate 522 may be integrally formed to form the support 52.

In the present embodiment, there are two support members 52. The two support members 52 are disposed symmetrically with respect to the longitudinal center axis of the fixed housing 51 as an axis of symmetry.

The top of the fixed housing 51 is opened with a key window 512, and the supporting plate 522 is opposite to the key window 512.

Further, referring to fig. 1 again, a plurality of engaging plates 53 are disposed in the fixed housing 51. One end of the plurality of engagement plates 53 is provided on the inner wall of the fixed housing 51, and the other end thereof freely extends toward the housing chamber 511. The plurality of clamping plates 53 are distributed in pairs at intervals along the axial direction of the fixed housing 51, and each group of clamping plates 53 is parallel to the other groups of clamping plates 53. In each set of the engaging plates 53, the free ends of the two engaging plates 53 are opposed to each other, and a gap is formed between the free ends of the two engaging plates 53.

The supporting member 52 and the clamping plate 53 may be fixedly disposed on the inner wall of the fixed housing 51 by means of gluing, welding, or mechanical structural connection. Alternatively, the stationary housing 51, the support member 52 and the snap plate 53 may be integrally formed to form the stationary handle 50, for example, by injection molding.

Referring to fig. 1 and 4, the movable handle 60 includes a movable housing 61 and a movable engaging member 62. The movable housing 61 encloses a cavity 611 with two open ends, the movable engaging member 62 is disposed on the inner wall of the movable housing 61, and the movable engaging member 62 is located at the open end of the distal end of the movable housing 61.

Further, a reinforcing plate 63 is provided in the movable case 61. One end of a plurality of reinforcing plates 63 is provided on the inner wall of the movable housing 61, and the other end freely extends toward the cavity 611. The plurality of reinforcing plates 63 are arranged in pairs in a group at intervals along the axial direction of the movable housing 61, and each group of reinforcing plates 63 is parallel to the other groups of reinforcing plates 63. In each set of the reinforcing plates 63, the free ends of the two reinforcing plates 63 are opposed to each other, and a gap is formed between the free ends of the two reinforcing plates 63.

Referring to fig. 1 again, the guide rod 70 is disposed through the fixed housing 51 and the movable housing 61, and the distal end of the guide rod 70 is fixedly connected to the fixed housing 51. The fixed housing 51 and the movable housing 61 are axially aligned, and the fixed housing 51 and the movable housing 61 can be connected or disconnected. When the fixed housing 51 and the movable housing 61 are connected, the proximal end face of the fixed housing 51 is aligned with and abuts the distal end face of the movable housing 61. When the fixed housing 51 and the movable housing 61 are separated, the movable housing 61 is axially slidable along the guide 70.

Specifically, the guide rod 70 sequentially passes through the gap formed by the two clamping plates 53 of each set, and the distal end of the guide rod 70 is clamped by the two clamping plates 53 of each set, so that the distal end of the guide rod 70 is fixedly connected with the fixed housing 51. Also, the side walls of the portions of the guide rods 70 near the proximal ends of the fixed housing 51 are also held by the support plates 522 of the two supports 52. The support 52 is configured as the above structure including the connecting plate 521 and the supporting plate 522, so that the return member 82 (the return member 82 is described in detail below) is conveniently supported, the connection between the guide rod 70 and the fixed housing 51 can be further strengthened, and the internal structure of the fixed housing 51 is compact. Further, the side wall of the guide bar 70 may be fixedly connected to the free end of each of the engagement plates 53 by means of gluing or welding. Furthermore, a stopper 71 is disposed on an outer wall of the guide rod 70, and the stopper 71 abuts against the snap-in plate 53 to further limit the axial sliding of the guide rod 70 along the fixed housing 51.

It should be noted that in other embodiments, the supporting member 52 may be omitted, and the return member 82 may be directly supported by the guide rod 70 such that the return member 82 is fixedly disposed in the fixed handle 50. The support member 52 is omitted, so that the structure of the fixing handle 50 is simple and the processing is convenient.

Set up a plurality of joint boards 53, on the one hand can joint guide arm 70 to be favorable to being connected the distal end of guide arm 70 with fixed casing 51 fixedly, on the other hand, a plurality of joint boards 53 have also played the effect of strengthening rib, are favorable to improving fixed casing 51's intensity.

It will be appreciated that the free end of each engagement plate 53 is shaped to conform to the shape of the outer surface of the guide bar 70 to better engage the guide bar 70. Each set of the engaging plates 53 may be of an integral structure, such as a hollow plate-like structure, the outer circumferential surface of which surrounds the axial direction of the fixed housing 51 and the outer circumferential surface of which is connected to the inner wall of the fixed housing 51. Through which the guide rod 70 passes.

The end of the guide rod 70 remote from the fixed handle 50, i.e., the proximal end of the guide rod 70, extends into the movable housing 61, sequentially through the gap of each set of reinforcing plates 63, and extends proximally and axially from the proximal end of the movable housing 61. The guide rod 70 is located in the portion of the movable housing 61, which is not clamped by each set of reinforcing plates 63, and a gap is formed between the outer surface of the guide rod 70 and the free end of each set of reinforcing plates 63, so as to ensure that the movable housing 61 can slide axially along the guide rod 70.

Referring to fig. 5, the guide rod 70 is a hollow tubular member, and a cavity 72 is formed inside the guide rod 70. Referring to fig. 2, a through hole 73 is formed on the wall of the guide rod 70, and the through hole 73 is communicated with the cavity 72. Referring again to FIG. 1, the proximal end of the outer sheath 30 is inserted into the cavity 72 of the guide rod 70, and the outer sheath 30 is fixedly connected to the movable housing 61 through the through hole 73. Specifically, a fixing member 64 may be provided in the movable housing 61, and one end of the fixing member 64 is fixedly connected to the inner wall of the movable housing 61, and the other end of the fixing member 64 extends into the cavity 72 from the through hole 73 and is fixedly connected to the outer wall of the outer sheath 30, so that the outer sheath 30 is fixedly connected to the movable housing 61.

In the present embodiment, the fixing member 64 has a sheet-like structure. The fixing member 64 includes proximal and distal end surfaces distributed in the axial direction and upper and lower end surfaces distributed in the radial direction. The distal end face and the proximal end face of the fixing member 64 are fixedly connected to the adjacent two reinforcing plates 63, respectively; the end face of the upper end of the fixing member 64 is suspended, the other end opposite to the suspended end extends into the cavity 72 from the through hole 73, and the end face of the lower end is fixedly connected with the outer wall of the outer sheath tube 30.

Further, a reinforcing tube 65 is further disposed in the movable housing 61, the reinforcing tube 65 is sleeved on the sheath tube 30, and a proximal end of the reinforcing tube 65 is fixedly connected to a distal end of the fixing member 64. It is understood that the reinforcing tube 65 may be omitted, and the sheath tube 30 and the movable housing 61 may be fixedly connected by the fixing member 64 and the through hole 73. The provision of the reinforcing tube 65 increases the contact area, so that the connection of the sheath 30 to the movable housing 61 is more reliable. The reinforcing tube 65 may be fixedly connected to the fixing member 64 by means of gluing, welding, or the like. Alternatively, the reinforcing tube 65 and the fixing member 64 may be integrally formed.

Referring to fig. 3 again, the locking device 80 includes a locking positioning member 81 and a returning member 82. The return member 82 is disposed inside the fixed housing 51, one end of the locking positioning member 81 is connected to the return member 82, the other end of the locking positioning member extends out from the proximal opening end of the fixed housing 51 and axially extends, and the end extending out from the fixed housing 51 is a free end. The radial position of the locking spacer 81 is controlled by the return member 82 so that the free end of the locking spacer 81 is engaged with or disengaged from the movable engaging member 62 of the movable handle 60, thereby connecting or disconnecting the fixed handle 50 and the movable handle 60.

It should be noted that, the one end of the locking positioning member 81 is connected to the return member 82, which means that one end of the locking positioning member 81 is directly connected or indirectly connected to the return member 82.

Specifically, the return element 82 is an elastic element, which may be a metal spring, a metal elastic sheet, or an elastic element made of a polymer elastic material. For example, the return member 82 may be a metal coil spring, an elastic sleeve made of a polymer material, or an elastic silicone gasket. The return member 82 shown in fig. 1 and 3 is a coil spring. The return member 82 is disposed on the supporting plate 522, a bottom of the return member 82 is fixedly connected to the supporting plate 522, and a top of the return member 82 is opposite to the key window 512. The end of the locking and positioning element 81 remote from the free end is fixedly connected to the side wall of the return element 82. When the return member 82 is compressed, the compression deformation of the return member 82 drives the locking positioning member 81 to move downward in the radial direction, so that the free end of the locking positioning member 81 is separated from the movable engaging member 62, the movable handle 60 is not restrained by the locking positioning member 81, the fixed handle 50 and the movable handle 60 are in an unlocked state, that is, the two are separated, and the movable handle 60 can slide along the guide rod 70 in the axial direction. When the distal end surface of the movable handle 60 is tightly attached to the proximal end surface of the fixed handle 50, the compressed state of the return member 82 is released, so that the return member 82 is returned, and the returned return member 82 drives the locking positioning member 81 to move upward in the radial direction to engage with the movable engaging member 62.

Specifically, the movable engaging member 62 is a projection provided on the inner wall of the movable housing 61. The locking positioning member 81 is provided with a blocking portion at an end thereof away from the return member 82, and the blocking portion is engaged with or separated from the protrusion to connect or separate the fixed handle 50 to or from the movable handle 60. In this embodiment, the blocking portion is a protrusion disposed at one end of the locking positioning member 81 away from the return member 82, and the protrusion is engaged with or separated from the protrusion to connect or separate the fixed handle 50 and the movable handle 60. More specifically, referring to fig. 6, in the present embodiment, the protrusion is a hook 811 disposed on the free end of the locking positioning member 81. Referring to fig. 3 again, the hook 811 hooks the protrusion to connect the fixed housing 51 and the movable housing 61.

It is understood that the shape of the protrusion is not limited to the hook shape, and may be any shape that can engage with the protrusion to connect the fixed handle 50 and the movable handle 60 or separate the fixed handle 50 and the movable handle 60 by the return member 82, for example, a rectangular parallelepiped protrusion or a square protrusion.

Preferably, the protrusion surrounds the longitudinal central axis of the movable housing 61, i.e. the movable engaging member 62 is a hollow sheet structure, such as a ring structure, and the outer peripheral surface of the movable engaging member 62 is fixedly connected to the inner wall of the movable housing 61. The lug encircles the setting of the longitudinal axis of activity casing 61, guarantees that movable handle 60 rotates when any position, and movable fastener 62 homoenergetic and locking setting element 81 block, and fixed handle 50 and movable handle 60 are under the locking state promptly, and movable handle 60 carries out 360 rotations along the axial and also can not influence block between them, is favorable to further guaranteeing that fixed handle 50 and movable handle 60 reliably connect and can not separate in transportation process or under the state that receives jolting.

It is understood that in other embodiments, the movable engaging member 62 may include a plurality of protrusions which are disposed around the longitudinal central axis of the movable housing 61 and which are spaced apart from each other so that when the movable handle 60 is rotated to release the engagement of the locking and positioning member 81 and the movable engaging member 62, the re-engagement is easily achieved by rotating the movable handle 60.

In another embodiment, the blocking portion may be an engaging groove opened at one end of the locking spacer 81 far from the return member 82, and the locking spacer 81 and the movable handle 60 may be movably connected by engaging the engaging groove with the movable engaging member 62.

Referring to fig. 6, the locking device 80 further includes a return link 83. The return connector 83 is a hollow structure surrounded by a side wall 831 and having at least one open end. Referring also to fig. 3, the return connector 83 further includes a stop plate 832, and the stop plate 832 is disposed at the top of the sidewall 831.

One end of the locking positioning member 81 far away from the hook 811 is fixedly connected with the side wall 831 of the return connecting member 83. The return member 82 is inserted into the return connector 83, the bottom of the return member 82 extends out of the open end of the return connector 83 and is fixedly connected to the support plate 522, and the top of the return member 82 abuts against the stop plate 832. The top of the return member 82 may or may not be fixedly connected to the blocking plate 832, and it is only necessary that the return connecting member 82 abut against the blocking plate 832. In this embodiment, the latching detent 81 and the return element 82 are indirectly connected by a return connection 83.

It is understood that the blocking plate 832 may be one, two symmetrically arranged, or the blocking plate 831 may be a ring-shaped structure, and the outer circumference of the ring-shaped blocking plate 832 is fixedly connected with the inner surface of the sidewall 831 of the return connection member 83. In other embodiments, the blocking tab 832 may be a sheet-like structure that completely seals one end of the cavity defined by the sidewall 831, in which case only one end of the return connector 83 is open. Regardless of the structure of the blocking plate 832, the blocking plate 832 and the sidewall 831 may be fixedly connected by gluing, welding, etc. to form the return connection member 83, or the return connection member 83 may be formed by integral molding.

Referring to fig. 7, in another embodiment, the return connector 83 further includes a limit portion 833 disposed in the cavity, and the limit portion 833 is a hollow cylinder. The upper bottom surface of the limiting portion 833 is fixedly connected with the blocking piece 832, the other end of the limiting portion 833 hangs in the air, and the limiting portion 833 and the side wall 831 form a gap. The part of the return member 82 in the return connecting member 83 is located in a gap formed between the stopper 833 and the side wall 831 and is held between the stopper 833 and the side wall 831.

It is understood that the stopper 833 may be omitted. However, the provision of the stopper 833 makes the connection between the return member 82 and the return link member 83 more reliable.

Referring to fig. 8, in another embodiment, the return connector 83 includes a sidewall 831 and a blocking piece 832, the sidewall 831 is enclosed into a cylindrical structure, the blocking piece 832 is disposed on an outer wall of the sidewall 831, and the blocking piece 832 protrudes from the sidewall 831. In this embodiment, the returning element 82 is an elastic pad, and an end of the elastic pad away from the supporting plate 522 is provided with a receiving groove, and a sidewall of the returning connecting element 83 is received in the receiving groove, so that the returning connecting element 83 partially penetrates through the returning element 82, and a top of the returning element 82 abuts against the blocking piece 832. And, the locking spacer 81 is directly connected to the side wall of the return member 82. In this embodiment, the connection between the return connector 83 and the return member 82 and the connection between the return member 82 and the locking and positioning member 81 can ensure the connection or disconnection between the fixed handle 50 and the movable handle 60. It is understood that in this embodiment, the return element 82 may be a coil spring, the return connection element 83 is partially received in the coil spring, and one end of the coil spring away from the support plate 522 abuts against the blocking plate 832.

It should be noted that in other embodiments, the return link 83 may be omitted. When the return connector 83 is omitted, the end of the locking positioning element 81 far from the hook 811 may be directly connected to the return element 82. However, the return connecting member 83 is provided to ensure that the return member 82 is reliably connected to the locking positioning member 81, so as to ensure that the return member 82 is reliably linked to the locking positioning member 81, and thus to ensure that the locking positioning member 81 is controlled to be connected to or separated from the movable handle 60 by the return member 82.

Further, referring to fig. 3 and 6, the locking device 80 further includes a key 84 and a key connector 85. The key connecting member 85 is disposed at an end of the return connecting member 83 away from the supporting plate 522, and an outer diameter of the key connecting member 85 is smaller than an outer diameter of the return connecting member 83. One end of the key 84 is sleeved on the key connector 85 and abuts against the top of the return connector 83, and the other end of the key 84 extends out of the key window 512 and is located outside the fixed handle 50. The push button 84 is pressed to press the retraction member 82 to move the latching member 81 radially downward to release the latching member 81 from the movable engaging member 62. When the button 84 is released, the return member 82 is reset to drive the locking positioning member 81 to move upward radially to engage with the movable engaging member 62 again.

It will be appreciated that in other embodiments, the key connector 85 may be omitted and the bottom of the key 84 may be connected directly to the top of the return connector 83. The provision of the key connector 85 facilitates a secure connection of the key 84 to the return connector 83.

It is understood that in another embodiment, the key 84 may be omitted, and the return link 83 may be extended in radial dimension such that an end of the return link 83 remote from the support plate 522 protrudes from the key window 512 to be located outside the fixed housing 51.

When the stent delivery system 100 is assembled, the lumen stent 1 is compressed and then placed in the accommodation chamber 40 surrounded by the sheath core tube 20 and the outer sheath tube 30, and the lumen stent 1 is loaded in the stent transporter 2. In the loaded state, the distal end surface of the outer sheath tube 30 abuts the proximal end surface of the guide head 10. The locking positioning member 81 of the locking device 80 is engaged with the movable engaging member 62 of the movable handle 60, so that the fixed handle 50 and the movable handle 60 are connected. In this state, the movable handle 60 cannot slide axially along the guide rod 70, and accordingly, the locked state of the movable handle 60 inhibits the outer sheath 30 from sliding axially, so that the distal end surface of the outer sheath 30 is held in abutment with the proximal end surface of the guide head 10. At this time, the luminal stent 1 is bound by the outer sheath 30, and the outer sheath 30 can be prevented from being withdrawn due to the separation of the movable handle 60 and the fixed handle 50 caused by the bumping during the delivery of the stent delivery system 100. In the clinical operation process, the condition that the movable handle 60 is separated from the fixed handle 50 to cause the withdrawal of the sheath tube 30 due to unreasonable operation of a doctor can be effectively avoided.

Therefore, since the handle assembly 90 of the stent transporter is provided with the locking device 80 comprising the locking positioning member 81 and the return member 82, the return member 82 controls the locking positioning member 81 to be connected with or separated from the movable handle 60 so as to connect or separate the fixed handle 50 with or from the movable handle 60, and when the stent transporter 2 comprising the handle assembly 90 of the stent transporter is used for transporting the luminal stent 1, the luminal stent 1 can be prevented from being released and opened in advance. Therefore, the stent delivery system 100 has good stability, and the stent delivery system 100 cannot be failed due to the fact that the luminal stent 1 is released and opened in advance.

Referring to fig. 9, yet another embodiment stent delivery system 200 includes a luminal stent 210 and a stent transporter 220.

Stent transporter 220 includes a guide head 221, a sheath-core tube 222, an outer sheath tube 223, and a stent transporter handle assembly 224. The structures and the connection relations of the guide head 221, the sheath core tube 222 and the outer sheath tube 223 are the same as those of the guide head 10, the sheath core tube 20 and the outer sheath tube 30 of the stent delivery system 100, respectively, and are not described herein again.

Handle assembly 224 of the stent transporter includes a fixed handle 225, a movable handle 226, a guide rod 227, and a locking device 228.

The structures of guide rod 227 and lock device 228 are the same as those of guide rod 70 and lock device 80, respectively. Specifically, the locking device 228 includes a locking locator 2281 and a return 2282.

The fixed handle 225 and the movable handle 226 have substantially the same structure as the fixed handle 50 and the movable handle 60, respectively. In contrast, the inner wall of the proximal opening end of the fixed handle 225 is provided with a fixed catch 2252, and the locking device 228 is connected to the fixed handle 225 and the movable handle 226 in a different manner. In this embodiment, the stationary catch 2252 surrounds the longitudinal center axis of the stationary handle 225. The return member 2282 is disposed on the movable handle 226, one end of the locking positioning member 2281 is connected to the return member 2282, and the other end is movably connected to the fixed engaging member 2252, the radial position of the locking positioning member 2281 is controlled by the return member 2282, so that the free end of the locking positioning member 2281 is engaged with or separated from the fixed engaging member 2252 of the fixed handle 225, and the fixed handle 225 and the movable handle 226 are connected or separated.

When the fixed handle 225 is connected with the movable handle 226, the bracket can be prevented from being released and opened in advance due to relative separation of the movable handle and the fixed handle caused by jolt and the like in the transportation and storage processes of the bracket conveying system, so that the product is prevented from losing efficacy before use.

When the fixed handle 225 is separated from the movable handle 226, as shown in fig. 8, the movable handle 226 slides axially proximally along the guide rods 227 to slide the outer sheath 223 axially proximally, thereby releasing the luminal stent 210.

It can be appreciated that the fixed catch 2252 can be the same or different structure as the movable catch 62, as long as the movable connection between the locking locator 2281 and the fixed catch 2252 is satisfied.

The technical features of the embodiments described above may be arbitrarily combined, and for the sake of brevity, all possible combinations of the technical features in the embodiments described above are not described, but should be considered as being within the scope of the present specification as long as there is no contradiction between the combinations of the technical features.

The above-mentioned embodiments only express several embodiments of the present invention, and the description thereof is more specific and detailed, but not construed as limiting the scope of the invention. It should be noted that, for a person skilled in the art, several variations and modifications can be made without departing from the inventive concept, which falls within the scope of the present invention. Therefore, the protection scope of the present patent shall be subject to the appended claims.

Claims

1. A handle assembly of a support conveyor comprises a fixed handle and a movable handle, and is characterized in that the handle assembly of the support conveyor also comprises a locking device, and the locking device comprises a locking positioning piece and a return piece;

2. The handle assembly of a rack feeder of claim 1, wherein the return member is a resilient member, the locking and positioning member being disengaged from the movable handle when the resilient member is compressed, and the locking and positioning member being engaged with the movable handle when the resilient member is returned.

3. The handle assembly of a rack conveyor according to claim 1, wherein the fixed handle includes a fixed housing and a supporting member, the fixed housing defines a receiving cavity, the supporting member is disposed in the receiving cavity, the fixed housing is provided with a button window, the bottom of the returning member is disposed on the supporting member, the top of the returning member is opposite to the button window, and the sidewall of the returning member is connected to the end of the locking positioning member away from the movable handle.

4. The handle assembly of a rack conveyor according to claim 1, wherein the movable handle comprises a movable housing and a movable engaging member, the movable housing defines a cavity, the movable engaging member is disposed on an inner wall of the movable housing, and one end of the locking positioning member away from the return member is movably connected to the movable engaging member to connect the fixed handle to the movable handle or to separate the fixed handle from the movable handle;

5. The handle assembly of a rack conveyor according to claim 4, wherein the movable engaging member is a protrusion disposed on the inner wall of the movable housing, the fixed engaging member is a protrusion disposed on the inner wall of the fixed housing, and a blocking portion is disposed at an end of the locking positioning member away from the return member, and the return member is used for controlling the blocking portion to engage with the protrusion or controlling the blocking portion to separate from the protrusion.

6. The handle assembly of a rack carrier of claim 5, wherein the blocking portion is a protrusion disposed at an end of the locking and positioning member away from the return member, and the protrusion engages with or disengages from the protrusion to connect or disconnect the fixed handle with or from the movable handle;

7. The handle assembly of a rack transporter of claim 5, wherein the projection surrounds a central longitudinal axis of the movable housing.

8. The handle assembly of a stent transporter of claim 1, wherein the locking device further comprises a return link coupled to the return member.

9. The handle assembly of claim 8, wherein the return connector is a hollow structure surrounded by sidewalls and having at least one open end, and the top of the sidewalls of the return connector is provided with a blocking piece, and one end of the locking positioning member is connected to the sidewalls of the return connector;

10. The handle assembly of a rack carrier of claim 1, wherein said locking mechanism further comprises a button that actuates said return member to control disengagement of said locking spacer from said movable handle.

11. A stent conveyor comprising a sheath core tube and an outer sheath tube, wherein the outer sheath tube is sleeved on the sheath core tube, the outer sheath tube can axially slide relative to the sheath core tube, and the sheath core tube and the outer sheath tube enclose an accommodating cavity, the stent conveyor further comprises a handle assembly of the stent conveyor as claimed in any one of claims 1 to 10, the outer sheath tube axially penetrates through the fixed handle and the movable handle, and the outer sheath tube is fixedly connected with the movable handle.

12. A stent delivery system comprising a luminal stent, wherein the stent delivery system further comprises a stent transporter as defined in claim 11, wherein the luminal stent is received in the receiving cavity.