CN117982199A

CN117982199A - Locking structure, handle, thrombus taking device and sheath tube assembly

Info

Publication number: CN117982199A
Application number: CN202410390262.7A
Authority: CN
Inventors: 钟志雄; 蔡楠; 彭大冬; 周志坚; 文超逸; 钟炜; 山鹰
Original assignee: Saiwei Medical Technology Shanghai Co ltd; Meizhou Peoples Hospital
Current assignee: Saiwei Medical Technology Shanghai Co ltd; Meizhou Peoples Hospital
Priority date: 2024-04-02
Filing date: 2024-04-02
Publication date: 2024-05-07
Anticipated expiration: 2044-04-02
Also published as: CN117982199B

Abstract

The application discloses a locking structure, a handle, a thrombus taking device and a sheath tube assembly, and relates to the technical field of medical instruments. The application discloses a locking structure which is applied to a bolt taking device and accessories thereof. The locking structure includes knob and slip joint, wherein: the sliding joint is used for being slidably arranged on the handle shell of the thrombus taking device or the accessory thereof so as to drive the corresponding outer sleeve to move; the knob is rotatably arranged on the sliding joint so as to enable the locking structure to be switched between a locking state and an unlocking state; under the condition that the locking structure is in a locking state, the knob can rotate to a first position matched with the shell in a positioning way so as to lock the sliding joint; when the locking structure is in an unlocked state, the knob can be rotated to a second position in which the knob is disengaged from the housing to release the sliding joint. The scheme at least can solve the problem that the locking structure of the thrombus taking device or the sheath tube component in the related art is unlocked by mistake.

Description

Locking structure, handle, thrombus taking device and sheath tube assembly

Technical Field

The application relates to the technical field of medical instruments, in particular to a locking structure, a handle, a thrombus taking device and a sheath tube assembly.

Background

The mechanical thrombus taking means has been widely used in the prevention and treatment of cerebral infarction, myocardial infarction and other diseases caused by vascular occlusion by virtue of the advantages of better safety, good prognosis and the like. Among them, the stent type thrombus taking device is favored by industry because of simple operation and high thrombus catching success rate.

In the related art, the thrombus removing device and the sheath tube assembly matched with the thrombus removing device are all provided with a locking structure, and the locking structure is used for controlling the release or locking of the corresponding outer sleeve. For example, after the thrombus removing device is inserted into a blood vessel, the locking structure is controlled to unlock the movable outer sleeve to release the thrombus removing net, otherwise abrasion of the thrombus removing net and the sheath tube assembly is easily caused, and meanwhile, the inserting efficiency of the thrombus removing device is reduced. However, in practice, the locking structure is prone to unlocking by mistake during the holding and use of the related thrombolysis device or sheath tube assembly, which results in out-of-order thrombolysis operation.

Disclosure of Invention

The application provides a locking structure, a handle, a thrombus taking device and a sheath tube assembly, which at least can be used for solving the problem that the locking structure of the thrombus taking device or the sheath tube assembly is unlocked by mistake in the related art.

In a first aspect, an embodiment of the present application provides a locking structure applied to a thrombus removing device and an accessory thereof, wherein the locking structure includes a knob and a sliding joint. Wherein: the sliding joint is used for being slidably arranged on the handle shell of the thrombus taking device or the accessory thereof so as to drive the corresponding outer sleeve to move; the knob is rotatably arranged on the sliding joint so as to enable the locking structure to be switched between a locking state and an unlocking state; under the condition that the locking structure is in a locking state, the knob can rotate to a first position matched with the shell in a positioning way so as to lock the sliding joint; when the locking structure is in an unlocked state, the knob can be rotated to a second position in which the knob is disengaged from the housing to release the sliding joint.

In some embodiments of the present application, one of the knob and the sliding joint is provided with a positioning recess, and the other is provided with a first positioning protrusion, and the positioning recess can be in clamping fit with the first positioning protrusion to position the knob at the first position or the second position during rotation of the knob relative to the sliding joint.

In some embodiments of the application, one of the knob and the sliding joint is provided with a rotary groove, and the other is provided with a second positioning protrusion, and the knob and the sliding joint are in rotary fit through the rotary groove and the second positioning protrusion. Wherein: one of the positioning recess and the first positioning protrusion is arranged on the groove surface of the rotary groove, and the other one of the positioning recess and the first positioning protrusion is arranged on the second positioning protrusion; and/or at least one of the positioning recess and the first positioning protrusion is provided on the elastic engagement arm of the corresponding base member.

In some embodiments of the application, the knob is of an annular structure so as to be sleeved on the circumference of the shell to realize rotation; the knob has at least two supporting protrusions distributed circumferentially on an inner surface thereof for supporting to an outer surface of the housing during rotation of the knob.

In some embodiments of the application, the knob has a first positioning portion in positioning engagement with the housing, the first positioning portion being a third positioning protrusion having a deformation space therethrough along a first direction, the first direction being distributed along a rotational axis of the knob.

In some embodiments of the application, the knob has two gripping locations provided on its outer surface, the two gripping locations being distributed along the same radial direction of the knob. Wherein: the holding position and the supporting bulge are staggered in the circumferential direction of the knob; or the at least two supporting bulges comprise a first supporting bulge and a second supporting bulge, the first supporting bulge corresponds to the holding position along the circumferential direction of the knob, the second supporting bulge is positioned at the holding dislocation, and the height of the first supporting bulge is smaller than that of the second supporting bulge.

In some embodiments of the application, the sliding joint has a receiving aperture, a distal side of the receiving aperture for mounting the outer sleeve, and a proximal side of the receiving aperture for insertion into the inner tube; the locking structure also comprises a sealing piece arranged at one side of the proximal end of the containing hole, and the sealing piece is used for sealing a gap between the built-in pipe fitting and the hole wall of the containing hole. Wherein: the sliding joint also comprises an exhaust duct, and the exhaust duct is connected between the sealing element and a part of the containing duct corresponding to the proximal end of the outer sleeve; and/or the sliding joint comprises a first joint and a second joint, wherein the first joint is used for installing a knob, the second joint is used for installing an outer sleeve, and the sealing element is arranged at the joint of the first joint and the second joint.

In some embodiments of the present application, the sliding joint comprises an exhaust branch pipe, the exhaust branch pipe is provided with an exhaust duct, the exhaust branch pipe can extend to the outside of the shell through a sliding groove on the shell, and the sliding groove is used for sliding fit of the sliding joint on the shell; the knob is provided with a first positioning part which is matched with the shell in a positioning way, the first positioning part and the exhaust branch pipe are arranged at intervals along the axial direction of the locking structure, and the locking structure is configured to be corresponding to the far-end positioning part of the shell under the condition that the exhaust branch pipe is abutted against the far end of the sliding groove; the shell is matched with the knob in a positioning way through the far-end positioning part.

In a second aspect, embodiments of the present application provide a handle comprising the locking structure of the first aspect of embodiments of the present application.

In a third aspect, an embodiment of the present application provides a thrombus removing device, including a first outer sleeve and a handle according to the second aspect of the embodiment of the present application, where the sliding joint is fixedly connected to the first outer sleeve, and is used to drive the first outer sleeve to move.

In a fourth aspect, an embodiment of the present application provides a sheath assembly, including a second outer sleeve and a handle according to the second aspect of the embodiment of the present application, where the sliding joint is fixedly connected to the second outer sleeve, so as to drive the second outer sleeve to move.

The technical scheme adopted by the embodiment of the application can achieve the following beneficial effects:

When the locking structure disclosed by the embodiment of the application is applied to a bolt taking device or a fitting thereof, the knob is rotatably arranged on the sliding joint so that the locking structure is switched between a locking state and an unlocking state, thus, the pressing acting force generated when a worker holds a corresponding handle shell or acting force distributed along the axial direction of the handle is different from the force application direction of the rotating knob, and the acting force can not unlock the locking structure, but strengthen the locking state of the locking structure due to friction, interference and other reasons among the structures, so that the situation of false unlocking of the locking structure can be prevented very reliably.

Compared with the related art, the locking structure provided by the embodiment of the application can ensure that the situation of mistakenly touching and unlocking the thrombus taking device and accessories thereof can be avoided in the using process, so that the thrombus taking operation is ensured to be carried out smoothly, and the operation efficiency and safety are effectively improved.

Drawings

The accompanying drawings, which are included to provide a further understanding of the application and are incorporated in and constitute a part of this specification, illustrate embodiments of the application and together with the description serve to explain the application and do not constitute a limitation on the application.

In the drawings:

FIG. 1 is an assembled schematic view of a thrombolytic device kit according to a first embodiment of the present application;

FIG. 2 is an enlarged view of a portion of FIG. 1 at A;

FIG. 3 is a partial enlarged view at B in FIG. 1;

FIG. 4 is an exploded view of a thrombolytic device kit according to a first embodiment of the present application;

FIG. 5 is an enlarged view of a portion of FIG. 4 at C;

FIG. 6 is a partial enlarged view at D in FIG. 4;

FIG. 7 is an exploded view of a locking mechanism disclosed in a first embodiment of the present application;

FIG. 8 is an exploded view of the locking structure according to the first embodiment of the present application from another perspective;

FIG. 9 is a top view of a knob disclosed in a second embodiment of the application;

FIG. 10 is a top view of a knob disclosed in a third embodiment of the application;

FIG. 11 is a schematic view showing a partial structure of a thrombus removal device according to the first embodiment of the present application (with portions of the first housing and the second connector hidden);

Fig. 12 to 15 and 17 are schematic operation flow diagrams of a thrombus removing device kit according to a first embodiment of the present application;

FIG. 16 is an enlarged view of a portion of FIG. 15 at E;

fig. 18 is a partial enlarged view of F in fig. 17.

Reference numerals illustrate:

10-thrombus taking device, 11-first shell, 11 a-first chute, 11 b-first positioning slot, 11 c-second positioning slot, 12-first outer sleeve, 13-thrombus taking net, 14-control rod group, 14 a-first rod body, 14 b-second rod body, 14 c-tightening piece, and,

20-Sheath tube assembly, 21-second shell, 21 a-third positioning groove, 21 b-fixed wing block, 22-second outer sleeve, 23-inner sheath, 23 a-supporting net, 24-branch, and,

100-Locking structure,

110-Knob, 111-positioning recess, 112-supporting projection, 112 a-first supporting projection, 112 b-second supporting projection, 113-second positioning projection, 114-third positioning projection, 115-holding position,

120-Sliding joint, 121-first joint, 121 a-first positioning protrusion, 121 b-rotating groove, 121 c-elastic engagement arm, 122-second joint, 122 a-exhaust branch pipe, 122a 1-exhaust duct, 122 b-glue injection hole,

130-Seals.

Detailed Description

In order to make the objects, technical solutions and advantages of the present application more apparent, the technical solutions of the present application will be clearly and completely described below with reference to specific embodiments of the present application and corresponding drawings. It will be apparent that the described embodiments are only some, but not all, embodiments of the application. All other embodiments, which can be made by those skilled in the art based on the embodiments of the application without making any inventive effort, are intended to be within the scope of the application.

In various embodiments of the present application, "proximal" and "distal" refer to the end of the thrombolytic device and its components and accessories that are closer to the user than they are to the user in the use environment, wherein the end that is farther from the user is designated as the "proximal end" and the end that is farther from the user is designated as the "distal end".

In order to facilitate understanding of the locking structure, the handle, the thrombus removing device and the sheath tube assembly provided by the embodiment of the application, the related technology is first described below in connection with an application scenario.

In some specific use processes of the related stent type thrombus taking device, the condition that the locking structure on the handle is unlocked by mistake causes the thrombus taking operation to be out of order, and the exemplary manifestation is that when the insertion part of the thrombus taking device is still positioned in the sheath tube, the outer sleeve of the thrombus taking device is retracted in advance due to the unlocking by mistake of the locking structure, so that the thrombus taking net and the inner wall of the sheath tube are worn, and meanwhile, the insertion action is blocked, and the implementation smoothness of the insertion action is reduced. Of course, the problem caused by the incorrect unlocking of the locking structure of the handle is not limited to the above example, and is not repeated here.

Through researching a plurality of problems caused by out-of-order thrombolysis operation, the inventor finds that the problems are mainly caused by that the locking structure of the related technology is easy to unlock by mistake. Specifically, when the related thrombus removing device and its accessories (for example, sheath tube assembly) are used, an operator needs to hold the handle of the thrombus removing device, and the locking structure of each outer sleeve on the handle is a pressing structure, so that the holding force is always unlocked due to the mistaken touching of the pressing locking structure, and the outer sleeve is released, so that the thrombus removing operation is out of order.

In view of the above, embodiments of the present application provide a locking structure applied to a thrombus removing device and its accessories. It will be appreciated that the fitting of the thrombectomy device includes a sheath assembly capable of establishing an implantation channel within a vessel for the thrombectomy device.

Referring to fig. 1 to 18, a locking structure 100 disclosed in an embodiment of the present application includes a knob 110 and a sliding joint 120, wherein: the sliding joint 120 is slidably mounted on the handle housing of the thrombus removing device 10 or its fitting (the fitting of the thrombus removing device 10) to drive the corresponding outer sleeve to move. It should be noted that the housing and the outer sleeve according to the embodiments of the present application may refer to the housing and the outer sleeve of the thrombus extraction device 10, or may refer to the housing and the outer sleeve of the accessory (e.g., the sheath tube assembly 20) of the thrombus extraction device 10, which needs to be determined according to the corresponding usage situation of the locking structure 100.

It should be appreciated that both the latch mechanism 10 for use in a latch procedure and its fittings having the locking function requirements may employ the locking mechanism 100, i.e., the locking mechanism 100 may be slidably mounted to the handle housing of the latch mechanism 10, as well as to the handle housing of the corresponding fitting, such as the handle housing of the sheath and tube assembly 20, via the sliding joint 120. For convenience, the use of the embolectomy device 10 and sheath assembly 20 will be described below.

It should be noted that, after the locking structure 100 is installed in place, the corresponding outer sleeve should be connected to the sliding connector 120, so that the corresponding outer sleeve can be driven to move when the sliding structure 120 is controlled to move on the corresponding handle housing.

The outer sleeve according to the embodiments of the present application may refer to the first outer sleeve 12 of the thrombolytic device 10 or may refer to the second outer sleeve 22 of the sheath tube assembly 20. Wherein, the first outer sleeve 12 is sleeved outside the control rod group 14 of the thrombus taking device 10 and used for shielding or exposing the thrombus taking net 13; the second outer sleeve 22 is sleeved outside the inner sheath 23 of the sheath tube assembly 20 to restrain or release the support net 23a.

As shown in fig. 14-18, the thrombolytic mesh 13 is typically controlled by a control rod assembly 14 on the handle side of the thrombolytic device 10. For deployment, the insertion part of the control rod set 14 is built in the first outer sleeve 12, the first rod body 14a of the control rod set 14 is built in the second rod body 14b of the control rod set, the distal end of the thrombus taking net 13 is connected with the distal end of the first rod body 14a, and the proximal end of the thrombus taking net 13 is connected with the distal end of the second rod body 14 b; when the first rod body 14a and the second rod body 14b are driven to approach each other, the distance between the distal ends of the first rod body 14a and the second rod body 14b is reduced, and then the two ends of the thrombus removing net 13 are gathered together, so that the whole net rack is arched inwards, namely the thrombus removing net 13 is switched to an expanded state; when the first rod body 14a and the second rod body 14b are driven to be away from each other, the distance between the distal ends of the first rod body 14a and the second rod body 14b is increased, so that the distance between the two ends of the thrombolytic mesh 13 is also increased, and the whole mesh frame is lengthened, namely the thrombolytic mesh 13 is switched to a contracted state.

In addition, as shown in fig. 12 and 13, the inner sheath 23 of the sheath tube assembly 20 is built in the second outer sleeve 22, the inner sheath 23 comprises a supporting net 23a arranged on one side close to the distal end, the supporting net 23a is restrained by the second outer sleeve 22, the supporting net 23a is released when the second outer sleeve 22 is retracted proximally, and the released supporting net 23a is spread to be supported on the vessel wall, so that a larger passing space is formed at the distal end of the sheath tube assembly 20, and thrombus can be smoothly pushed into the sheath tube assembly 20 when the thrombus taking net 13 is retracted.

As can be seen from the above description, the use of either the first outer sleeve 12 or the second outer sleeve 22 requires maintenance in a specific state and is achieved by means of the locking structure 100. In order to facilitate the description, the control of the first outer cannula 12 by the thrombolytic device 10 is described.

In the embodiment of the present application, the knob 110 is rotatably disposed on the sliding joint 120, so that the locking structure 100 is switched between the locked state and the unlocked state, that is, the locking structure 100 is switched by the rotation action. With the locking structure 100 in the locked state, the knob 110 may be rotated to a first position in positioning engagement with the housing to lock the sliding joint 120; with the locking structure 100 in the unlocked state, the knob 110 can be rotated to a second position that is disengaged from the housing to release the sliding joint 120.

For ease of understanding, embodiments of the present application are illustrated in terms of the operational flow of a set of thrombolytic devices in a thrombolytic procedure. Referring to fig. 12-18, some embodiments of the application illustrate a thrombolytic device kit.

As shown in fig. 12, in the initial stage of the thrombolysis operation, the insertion portion of the sheath tube assembly 20 is first inserted into a blood vessel, and after the insertion portion is inserted into place, the locking structure 100 is switched from the locked state to the unlocked state by rotating the knob 110 of the locking structure 100, and the rotation direction of the knob 110 can refer to the hollow arrow in fig. 12; with the locking structure 100 in the unlocked state, the knob 110 is disengaged from the second housing 21 of the handle portion of the sheath tube assembly 20, and the locking structure 100 as a whole can slide along with the sliding joint 120 from the distal end of the handle of the sheath tube assembly 20 to the proximal end thereof, in the direction of the dashed arrow of fig. 12.

Since the second outer sleeve 22 is connected to the sliding joint 120, when the locking structure 100 is in the unlocked state, the position lock of the second outer sleeve 22 in the axial direction of the sheath tube assembly 20 is also released, and the second outer sleeve 22 can slide together with the locking structure 100 to achieve retraction.

After the locking structure 100 is slid to the proximal end of the handle of the sheath assembly 20, the second outer sleeve 22 is retracted, releasing the support mesh 23a and the support mesh 23a supporting the vessel wall, as shown in fig. 13. At this time, the knob 110 of the locking structure 100 may be reversely rotated to engage the knob 110 with the second housing 21 of the sheath tube assembly 20, and the rotation direction of the knob 110 may refer to the hollow arrow in fig. 13, so that the locking structure 100 may be switched to the locked state, preventing the second outer sleeve 22 from moving distally to shield and house the supporting net 23a.

As shown in fig. 14, the insertion portion of the thrombectomy device 10 is inserted into the sheath assembly 20 until the distal end of the insertion portion of the thrombectomy device 10 enters the target thrombus of the blood vessel, as determined by the visualization ring on the first outer cannula 12. Then, by rotating the knob 110 of the locking structure 100, the rotation direction of the knob 110 may refer to the hollow arrow in fig. 14, so that the locking structure 100 is switched from the locked state to the unlocked state; with the locking mechanism 100 in the unlocked state, the knob 110 is disengaged from the first housing 11 of the handle portion of the thrombolytic device 10, and the locking mechanism 100 as a whole can slide along with the sliding joint 120 from the distal end of the handle of the thrombolytic device 10 to the proximal end thereof, the sliding direction being indicated by the dashed arrow in fig. 14.

Since the first outer sleeve 12 is connected to the sliding joint 120, when the locking structure 100 is in the unlocked state, the position of the first outer sleeve 12 in the axial direction of the thrombus removing device 10 is also unlocked, and the first outer sleeve 12 can slide along with the locking structure 100 to realize retraction.

As shown in fig. 15 and 16, after the locking mechanism 100 is slid to the proximal end of the handle of the embolectomy device 10, the first outer sleeve 12 is retracted, releasing, exposing the embolectomy net 13. At this time, the knob 110 of the locking structure 100 can be reversely rotated to match the knob 110 with the first housing 11 of the thrombus removing device 10, and the rotation direction of the knob 110 can refer to the left hollow arrow in fig. 15, so that the locking structure 100 can be switched to the locking state, and the first outer sleeve 12 is prevented from moving distally to shield and store the thrombus removing net 13.

In addition, when the thrombus removing device 10 is in the state shown in fig. 15 and 16, the state of the control lever set 14 can be adjusted to unlock the first lever 14a and the second lever 14b from each other, so as to switch the state of the thrombus removing net 13. For example, the unlocking of the control rod set 14 may be achieved by rotating the tightening member 14c, the rotation direction of the tightening member 14c may refer to the hollow arrow on the right in fig. 15, and pulling the first rod body 14a proximally, the direction of pulling the first rod body 14a may refer to the dotted arrow in fig. 15, and the thrombolytic net 13 is switched from the contracted state to the expanded state. Subsequently, the locking of the control rod assembly 14 can be achieved by rotating the tightening member 14c in the opposite direction, which can be done by referring to the hollow arrow in fig. 17, preventing the first rod body 14a from moving distally, thereby ensuring that the thrombolytic net 13 does not become contracted.

As shown in fig. 17 and 18, the thrombus removing net 13 is in an expanded state, the expanded thrombus removing net 13 is radially spread, and occupies a larger space in the blood vessel, at this time, an operator can pull the thrombus removing device 10 integrally, the pulling direction can refer to the dotted arrow in fig. 17, so as to drive the thrombus removing net 13 to retract to capture thrombus, and after the thrombus removing device 10 is withdrawn integrally from the sheath tube assembly 20, the thrombus can be carried out of the blood vessel along with the thrombus removing net 13.

After the thrombus removing device 10 is withdrawn from the sheath tube assembly 20, since thrombus is usually remained in the sheath tube assembly 20, the branch 24 of the sheath tube assembly 20 can be connected with a negative pressure device to suck out the residual thrombus, so as to achieve a better thrombus removing effect. Wherein, the negative pressure device can be selected as a syringe.

Finally, by turning the knob 110 of the locking structure 100 on the sheath tube assembly 20 to switch it to the unlocked state and sliding the locking structure 100 to the distal end of the second housing 21 of the handle of the sheath tube assembly 20, the second outer sleeve 22 moves toward the distal end of the sheath tube assembly 20, thereby restraining the support net 23a at the distal end of the inner sheath 23 until the second outer sleeve 22 is completely shielded outside the support net 23a, thus releasing the support effect of the support net 23a on the vessel wall and facilitating the operator to withdraw the sheath tube assembly 20 entirely from the vessel.

As can be seen from the operation procedure provided in the above embodiment, the locking structure has a plurality of switching conditions between the locking state and the unlocking state, but the locking structure 100 according to the embodiment of the present application is applied to the latch taking device 10 or the accessory (such as the sheath tube assembly 20) thereof, which is capable of switching between the locking state and the unlocking state through the rotation action, and the radial pressing force generated when the handle is held or the force distributed along the axial direction of the handle is different from the force direction (distributed along the circumferential direction) of the rotation knob 110, and these forces will not unlock the locking structure 100, but rather strengthen the locking state of the locking structure 100 due to friction, interference between the structures, etc., so that the situation that the locking structure 100 is misunderstood can be prevented very reliably. Compared with the related art, the locking structure 100 of the embodiment of the application can ensure that the thrombus taking device 10 and accessories thereof are prevented from being unlocked by false touch in the use process, thereby ensuring that the thrombus taking operation is successfully carried out and effectively improving the operation efficiency and safety.

In some embodiments of the present application, one of the knob 110 and the sliding joint 120 is provided with a positioning recess 111, and the other is provided with a first positioning protrusion 121a, and the positioning recess 111 can be in snap fit with the first positioning protrusion 121a to position the knob 110 in the first position or the second position during rotation of the knob 110 relative to the sliding joint 120. Specifically, as shown in fig. 7 and 8, the knob 110 is provided with a positioning recess 111, and the sliding joint 120 is provided with a first positioning protrusion 121a, however, the setting positions of the positioning recess 111 and the first positioning protrusion 121a may be exchanged.

It will be appreciated that the locking arrangement 100 is switched between the locked and unlocked states by the knob 110 being in a positioning engagement with a housing (e.g. the first housing 11 or the second housing 21) of the respective handle. Further, in this example, the positioning cooperation of the first positioning protrusion 121a and the positioning recess 111 realizes that the locking structure 100 maintains the relative positional relationship between the knob 110 and the sliding joint 120 in the locked state, and the first positioning protrusion 121a and the positioning recess 111 ensure that the locking structure 100 reliably and stably maintains the state in a clamping manner, so that the performance of preventing the false touch unlocking is further improved.

In addition, since the first positioning protrusion 121a is engaged with the structure forming the positioning recess 111, in the process of rotating the knob 110, no matter in which the first positioning protrusion 121a is engaged into the positioning recess 111, or in which the first positioning protrusion 121a is withdrawn from the positioning recess 111, a variable damping effect is generated, so that the operation feel of the operator is enhanced in the process of rotating the knob 110. In experience, the operator can determine the progress of rotating the knob 110 by the damping touch, specifically, as long as the damping touch is felt, i.e., the knob 110 has not been rotated to the first position or the second position.

Embodiments of the present application do not limit the specific positioning cooperation of knob 110 and sliding joint 120 during relative rotation, but may be implemented by means such as magnetic positioning, in addition to the male and female engagement structures. It should be noted that, even if the magnetic positioning method is adopted, the magnetic pole is close to the magnetic force and is larger, and the magnetic pole is far away from the magnetic force and smaller, the operator can obtain the damping touch feeling through the magnitude of the magnetic force, so as to enhance the operation hand feeling of the operator, and further judge the rotation progress of the knob 110.

In some embodiments of the present application, one of the knob 110 and the sliding sub 120 is provided with a rotation groove 121b, and the other is provided with a second positioning protrusion 113, and the knob 110 and the sliding sub 120 are rotatably coupled by the rotation groove 121b and the second positioning protrusion 113; wherein: one of the positioning recess 111 and the first positioning projection 121a is provided on the groove surface of the rotation groove 121b, and the other of the positioning recess 111 and the first positioning projection 121a is provided on the second positioning projection 113. Specifically, as shown in fig. 7 and 8, the rotation groove 121b is provided on the sliding joint 120, the second positioning protrusion 113 is provided on the knob 110, and the positioning recess 111 is provided on the second positioning protrusion 113, and the first positioning protrusion 121a is provided on the groove surface of the rotation groove 121 b. Of course, the embodiment of the present application does not limit the specific layout of the rotation groove 121b, the second positioning protrusion 113, the positioning recess 111, and the first positioning protrusion 121 a.

It should be understood that the present example enables the relative rotation of the knob 110 and the sliding joint 120 through the rotation groove 121b and the second positioning protrusion 113, so that the operator can switch the state of the locking structure 100 by rotating the knob 110. Meanwhile, the positioning recess 111 and the first positioning protrusion 121a for realizing the relative circumferential position fixation of the knob 110 and the sliding joint 120 belong to one set of positioning structures, and the rotation groove 121b and the second positioning protrusion 113 belong to another set of positioning structures, whereas the former is provided in the latter, compared with the layout manner in which the two sets of positioning structures are separately provided, so that the structural compactness of the locking structure 100 can be improved.

In a further embodiment, the positioning recess 111 and the first positioning protrusion 121a are provided on surfaces of the rotation groove 121b and the second positioning protrusion 113, respectively, which are axially distributed along the corresponding base member, wherein the base member refers to a base structure provided with the rotation groove 121b or the second positioning protrusion 113, for example, in the embodiment shown in fig. 7 and 8, the base member of the rotation groove 121b is the sliding joint 120, and the base member of the second positioning protrusion 113 is the knob 110.

In this arrangement, after the first positioning protrusion 121a withdraws from the positioning recess 111, the pressing force between the two is distributed in the axial direction of the base member, that is, in the clamping direction of the rotating groove 121b and the second positioning protrusion 113, so that the matching reliability of the knob 110 and the sliding joint 120 can be improved compared with the manner that the pressing force between the first positioning protrusion 121a and the positioning recess 111 is distributed along the radial direction, which is easy to bring the second positioning protrusion 113 out of the rotating groove 121 b.

In some embodiments of the present application, one of the knob 110 and the sliding sub 120 is provided with a rotation groove 121b, and the other is provided with a second positioning protrusion 113, and the knob 110 and the sliding sub 120 are rotatably coupled by the rotation groove 121b and the second positioning protrusion 113; wherein: at least one of the positioning recess 111 and the first positioning projection 121a is provided on the elastic engagement arm 121c of the corresponding base member. Specifically, as shown in fig. 7 and 8, the rotation groove 121b is provided on the sliding joint 120, and the second positioning protrusion 113 is provided on the knob 110, wherein the base member of the first positioning protrusion 121a, that is, the sliding joint 120 is provided with the elastic engagement arm 121c. Of course, embodiments of the present application are not limited to a specific arrangement of the rotation groove 121b, the second positioning protrusion 113, and the elastic engagement arm 121c. For example, the knob 110 may also be provided with a resilient engagement arm 121c.

It should be understood that this example is based on the rotation groove 121b and the second positioning protrusion 113 to realize the relative rotation of the knob 110 and the sliding joint 120, so that the operator can rotate the knob 110 to switch the state of the locking structure 100. The base member of this example is different from the above, and the base member of this example is a base structure provided with the positioning recess 111 or the first positioning protrusion 121a, and is, of course, the knob 110 or the sliding joint 120.

In this example, the elastic engagement arm 121c has elastic deformation capability, so as to provide an avoidance margin in the process of clamping the positioning recess 111 and the first positioning protrusion 121a, and avoid damage to the part where the positioning recess 111 and the first positioning protrusion 121a are located due to excessive pressing force. In addition, it is required to consider that the elastic deformability of the elastic engagement arm 121c is beneficial to make the aforementioned damping touch feel closer to the preset value, and compared with the scheme without the elastic engagement arm 121c, the damping touch feel of this example is neither too large to cause the operator to be hard to rotate, nor too small to cause the operator to lack damping experience.

In a further embodiment, as shown in fig. 8, the elastic engagement arm 121c is a structure forming the rotation groove 121b or a portion of the second positioning protrusion 113, which can further improve the compactness.

With respect to the positional characteristics of the positioning recess 111 and the first positioning projection 121a on the elastic engagement arm 121c, the embodiment of the present application is also not particularly limited. For example, as shown in fig. 8, the first positioning protrusion 121a is disposed at the free end of the elastic engagement arm 121c, so that the portion of the elastic engagement arm 121c corresponding to the first positioning protrusion 121a is deformed, and because the moment arm is larger, the deformation is easier to generate, thereby facilitating the realization of the damping touch feeling. On the basis of this, that is, in the case where it is ensured that the elastic engagement arm 121c can achieve a sufficiently damped touch, the length thereof can be set short, so that the area of the notch on the corresponding base member configured for forming the elastic engagement arm 121c can be reduced, and a significant decrease in the strength of the base member can be avoided.

In some embodiments of the present application, as shown in fig. 2,3, 5, 7 and 8, the knob 110 has a ring structure to be sleeved on the circumference of the housing to realize rotation; the knob 110 has at least two supporting protrusions 112 distributed in the circumferential direction on an inner surface thereof, and the supporting protrusions 112 are for supporting to an outer surface of the housing during rotation of the knob 110.

It should be appreciated that the support protrusions 112 may serve as support points for supporting the outer surface of the corresponding handle housing during rotation of the knob 110, and the spaces between circumferentially adjacent support protrusions 112 correspond to hollowed-out areas, which reduce the contact area between the inner side of the knob 110 and the outer surface of the housing, thereby reducing friction and facilitating the operator's rotation operation; meanwhile, the supporting points are distributed along the circumferential direction, so that the coaxiality of the knob 110 in the rotating process can be ensured, and deflection is avoided.

Based on the above-described scheme with respect to the supporting protrusion 112, in a further embodiment, as shown in fig. 9, the knob 110 has two grip positions 115 provided at an outer surface thereof, the two grip positions 115 being distributed along the same radial direction of the knob 110, wherein: in the circumferential direction of the knob 110, the grip 115 is offset from the support protrusion 112.

It should be appreciated that the grip 115 facilitates the operator to identify and securely grip the knob 110 when operating, which may be a groove as shown in fig. 9, a bump, an array of bumps, or the like.

In this example, during the process that the operator touches the holding position 115 and rotates the knob 110, the knob 110 is forced to deform inwards in the radial direction where the holding position 115 is located, and in view of the characteristics of the knob 110 as a ring structure and recovering the deformation, the parts of the knob 110 except for the holding position 115 are substantially spread apart, so that the spread supporting protrusions 112 can be separated from the outer surface of the handle housing or at least reduce the mutual abutting force with the outer surface of the handle housing, which can reduce the damping effect suffered by the knob 110, and is beneficial to the operator to implement the rotation operation of the knob 110.

Based on the above-described scheme with respect to the supporting protrusion 112, in another further embodiment, as shown in fig. 10, the knob 110 has two grip positions 115 provided at an outer surface thereof, the two grip positions 115 being distributed along the same radial direction of the knob 110, wherein: the at least two support protrusions 112 include a first support protrusion 112a and a second support protrusion 112b, the first support protrusion 112a corresponds to the grip 115 in the circumferential direction of the knob 110, the second support protrusion 112b is dislocated from the grip 115, and the height of the first support protrusion 112a is smaller than the height of the second support protrusion 112 b. Wherein the heights of the first support protrusion 112a and the second support protrusion 112b in this example refer to their dimensions in the radial direction of the knob 110.

It should be appreciated that in this arrangement, during the operator touching the grip position 115 and rotating the knob 110, the knob 110 is forced to deform inwardly in the radial direction where the grip position 115 is located, and in view of the characteristics of the knob 110 as a ring structure and recovering deformation, the parts of the knob 110 except for the grip position 115 are generally spread apart, so that the first supporting protrusion 112a approaches the outer surface of the handle housing and the second supporting protrusion 112b is relatively far away from the outer surface of the handle housing, and the heights of the first supporting protrusion 112a and the second supporting protrusion 112b are preset, so that the supporting points (i.e., the first supporting protrusion 112a and the second supporting protrusion 112 b) can maintain the supporting force approximately consistent with the outer surface of the housing, and the coaxiality can be ensured while the differential damping effect in the circumferential direction of the knob 110 is reduced as much as possible, thereby optimizing the rotating feel.

In some embodiments of the present application, as shown in fig. 2, 3, 5, 7 and 8, the knob 110 has a first positioning portion that is in positioning engagement with the housing, the first positioning portion being a third positioning protrusion 114, the third positioning protrusion 114 having a deformation space penetrating in a first direction, the first direction being distributed along a rotational axis of the knob 110.

It should be appreciated that for a positioning engagement with the third positioning protrusion 114 on the knob 110, corresponding positioning grooves are provided on the respective housings, such as the first positioning groove 11b on the first housing 11 in fig. 5 and the second positioning groove 11c in fig. 6, and the third positioning groove 21a on the second housing 21 in fig. 3. Of course, in order to ensure that the knob 110 can slide smoothly on the corresponding housing and avoid interference, a sliding groove for avoiding the third positioning protrusion 114 needs to be provided on the corresponding housing, for example, a first sliding groove 11a provided on the first housing 11, and a second sliding groove (not shown in the drawings) is provided on the second housing 21. Of course, the concave-convex clamping structures of the knob 110 and the corresponding housing for realizing positioning fit can be exchanged, for example, the first positioning portion of the knob 110 is a positioning concave structure, and the corresponding housing is provided with a positioning convex structure.

In this example, since the third positioning protrusion 114 has a deformation space, when it collides with the corresponding handle housing during the rotation of the knob 110, the third positioning protrusion 114 can dissipate the pressed force by deformation, especially in the case that the operator applies excessive force and violently rotates the knob 110, the contact portion between the knob 110 and the corresponding housing can be prevented from being damaged due to excessive pressing.

In some embodiments of the present application, the sliding joint 120 has a receiving hole, a distal side of the receiving hole is used for installing the outer sleeve, and a proximal side of the receiving hole is used for inserting the inner tube; the locking structure 100 further includes a sealing member 130 disposed at a proximal end side of the receiving hole, where the sealing member 130 is used to seal a gap between the internal pipe fitting and a wall of the receiving hole. As shown in fig. 11, which illustrates one application of this example to a thrombolytic device 10, the distal end of the sliding joint 120 is fitted with a first outer cannula 12. In this embodiment of the application of the sheath and tube assembly 20, the distal end of the slip joint 120 is fitted with a second outer sleeve 22.

It should be understood that the built-in tubing mentioned in this example may refer specifically to the control rod assembly 14 of the thrombolytic device 10, or the inner sheath 23 of the finger sheath tube assembly 20, etc., which all need to be placed within the corresponding outer sleeve. In view of the operation principle of the bolt taking device 10 and the accessories thereof, the built-in pipe fitting is relatively movably arranged in the accommodating hole of the sliding joint 120 and the corresponding outer sleeve, for example, as shown in fig. 11, the bolt taking device 10 is shown in the schematic view, wherein the second rod body 14b of the control rod group 14 is positioned outside, and the second rod body 14b and the hole wall of the accommodating hole are sealed by the sealing element 130; meanwhile, a moving gap exists between the second rod 14b and the first outer sleeve 12, so as to drive the first outer sleeve 12 to move relative to the control rod set 14 when the sliding joint 120 is moved. Illustratively, in the sheath tube assembly 20, the seal is achieved between the inner sheath 23 and the bore wall of the receiving bore by the seal 130; meanwhile, a clearance gap exists between the inner sheath 23 and the second outer sleeve 22 to drive the second outer sleeve 22 to move relative to the inner sheath when the sliding joint 120 is moved.

In a further embodiment, as shown in fig. 11, the sliding joint 120 further includes a vent channel 122a1, and the vent channel 122a1 is connected between the seal 130 and a portion of the receiving channel corresponding to the proximal end of the outer sleeve (fig. 11 illustrates the first outer sleeve 12).

It will be appreciated that as in the previous analysis, there is a clearance between the inner tube and the corresponding outer sleeve, and that air in the clearance is easily carried into the vessel during the thrombolysis procedure, thereby adversely affecting the procedure. In this case, the sealing effect of the sealing member 130 is already achieved on the side of the receiving hole near the proximal end, so that the air between the inner tube and the outer tube can be exhausted by the exhaust hole 122a1, specifically including the air between the control rod assembly 14 and the first outer tube 12 in the thrombus removing device 10, the air between the inner sheath 23 and the second outer tube 22 in the sheath tube assembly 20, and the like, so that the air can be prevented from being brought into the blood vessel during the operation, thereby improving the quality of the thrombus removing operation. With respect to a specific evacuation means, air may be illustratively expressed by injecting an evacuation medium (e.g., saline, etc.) into the preoperatively venting orifice 122a 1.

In yet a further embodiment, as shown in fig. 7, 8 and 11, the sliding joint 120 includes a first joint 121 and a second joint 122, the first joint 121 being used for mounting the knob 110, the second joint 122 being used for mounting the outer sleeve (fig. 11 illustrates the first outer sleeve 12), and the seal 130 being provided at the junction of the first joint 121 and the second joint 122.

Under the layout, the butt joint part of the first joint 121 and the second joint 122 can expose the inner space of the sliding joint 120, so that the sealing element 130 is convenient to be built in, and the sealing fit between the built-in pipe fitting and the accommodating duct arm is realized; meanwhile, the sealing element 130 is placed at the butt joint of the first joint 121 and the second joint 122, and the sealing element 130 can be pressed between the first joint 121 and the second joint 122 in the butt joint assembly process of the two, so that the assembly of the sealing element 130 is more conveniently and conveniently realized.

More specifically, a step is formed in one of the first joint 121 and the second joint 122, such as the first joint 121 in fig. 11, and the other can press the seal 130 between the two joints during plugging.

In some embodiments of the present application, as shown in fig. 2, 4 and 5, the sliding joint 120 includes an exhaust branch pipe 122a, the exhaust branch pipe 122a is provided with an exhaust duct 122a1, and the exhaust branch pipe 122a may extend to the outside of the housing through a sliding groove (first sliding groove 11a is illustrated in fig. 2 and 5) on the housing (first housing 11 is illustrated in fig. 2 and 5) for sliding fit of the sliding joint 120 on the housing; the knob 110 has a first positioning portion that is in positioning engagement with the housing, the first positioning portion being arranged with the exhaust branch pipe 122a at an axial interval along the locking structure 100, the locking structure 100 being configured such that, in a case where the exhaust branch pipe 122a abuts against a distal end of the chute, the first positioning portion corresponds to a distal end positioning portion of the housing; the housing is in positioning engagement with the knob 110 via a distal positioning portion. It should be noted that the distal positioning portion is a structure on the handle housing that is in positioning fit with the knob 110 at the distal end thereof, and as shown in fig. 2 and 5, the distal positioning portion on the first housing 11 is a first positioning groove 11b. Of course, embodiments of the present application are not limited to the particular type of distal positioning portion on the handle housing.

It should be understood that, in the locking structure 100 of the embodiment of the present application, the state is switched by rotating the knob 110, and the locking structure 100 has a certain movement stroke on the corresponding housing in the axial direction, and the knob 110 needs to be rotated at a specific axial position to achieve positioning cooperation with the corresponding housing, which results in that when the operator switches the locking structure 100 from the unlocking state to the locking state, the operator needs to observe whether the locking structure is moved in place, and whether the knob 110 can smoothly achieve rotation, so that the operation is complicated, the burden of the operator is increased, and even the operator is caused to miss the operation due to distraction of the operator.

In view of this, in this embodiment, through the above-mentioned structural layout, in the process of controlling the sliding joint 120 to move in the chute, after the exhaust branch pipe 122a moves in place, that is, when it is determined that the exhaust branch pipe 122a moves to the distal end of the chute, it can be known through hand feeling, and the first positioning portion on the knob 110 is reliably determined to be aligned with the distal positioning portion on the corresponding handle housing through the structural dimension of the prefabricated locking structure 100, so that the operator can simply rotate the knob 110 to complete the positioning cooperation between the knob 110 and the housing, without observing again to determine whether the locking structure 100 moves in place or not, and whether the knob 110 is aligned or not, thereby simplifying the operation process, improving the efficiency and the operation reliability, in particular, reducing the burden of the operator and reducing the risk of the operation.

In a further embodiment, the proximal positioning portion of the housing may be correspondingly disposed at the proximal end of the chute, so that the locking structure 100 is limited when moving to the proximal end of the chute, and is positively moved in place, and the positioning engagement between the knob 110 and the housing can be completed by simply rotating the knob 110, without further observation and confirmation. It should be noted that the proximal positioning portion is a structure on the handle housing that is in positioning engagement with the knob 110 at the proximal end thereof, and as shown in fig. 3, the proximal positioning portion on the second housing 21 is a third positioning groove 21a. Of course, embodiments of the present application are not limited to the particular type of proximal positioning portion on the handle housing.

Referring to fig. 1 to 18, the embodiment of the present application further provides a handle, which includes the locking structure 100 according to any of the foregoing embodiments, so that the handle has the beneficial effects of the locking structure 100, which are not described herein.

As shown in fig. 1, 4, and 14-18, the handle may be applied to a thrombus extraction device 10, wherein the first outer sleeve 12 may be locked or released by controlling the locking structure 100. As shown in fig. 1, 4, 12-18, the handle may be applied to a sheath assembly 20 wherein the second outer sleeve 22 may be locked or released by controlling the locking structure 100

In some embodiments of the application, the handle housing may be provided with a securing structure for positioning mounting to an operating table. Illustratively, as shown in fig. 1, the second housing 21 is provided with a fixing wing 21b, and the second housing 21 can be reliably positioned on the operating table by the fixing wing 21b being engaged with a fixing groove on the operating table. Of course, embodiments of the present application are not limited to a particular type of securing structure.

Referring to fig. 1 to 18, an embodiment of the application further provides a thrombus removing device 10, which includes a first outer sleeve 12 and the handle described above, wherein the sliding joint 120 is fixedly connected with the first outer sleeve 12 for driving the first outer sleeve 12 to move. Thus, the latch release device 10 has the beneficial effects of the locking structure 100 described above, and will not be described herein.

Referring to fig. 1 to 18, an embodiment of the present application further provides a sheath assembly 20, which includes a second outer sleeve 22 and the aforementioned handle, wherein the sliding joint 120 is fixedly connected with the second outer sleeve 22 for driving the second outer sleeve 22 to move. Thus, the sheath assembly 20 has the beneficial effects of the locking structure 100 described above, and will not be described in detail herein.

Referring to fig. 1 to 18, an embodiment of the present application further provides a thrombus removing device kit, which includes the thrombus removing device 10 and the sheath assembly 20.

In the embodiments provided in the present application, some of the sleeve structures may be fixedly connected to the inner plug member by injecting glue through the opening in the outer sleeve member, in view of the small size of the associated components and accessories of the thrombolytic device 10. As shown in fig. 8 and 11, the second joint 122 is provided with glue injection holes 122b at both axial ends, and the first outer sleeve 12 and the first joint 121 may be fixedly connected by injecting glue through the glue injection holes 122 b. In this way, processing costs and assembly costs can be reduced; in addition, considering the requirement that air needs to be limited to enter a blood vessel in a thrombus removal operation, the sealing performance between the sleeved structures can be improved by using the fluidity of glue solution in the glue injection mode.

The foregoing embodiments of the present application mainly describe differences between the embodiments, and as long as there is no contradiction between different optimization features of the embodiments, the embodiments may be combined to form a better embodiment, and in view of brevity of line text, no further description is provided herein.

The foregoing is merely exemplary of the present application and is not intended to limit the present application. Various modifications and variations of the present application will be apparent to those skilled in the art. Any modification, equivalent replacement, improvement, etc. which come within the spirit and principles of the application are to be included in the scope of the claims of the present application.

Claims

1. The utility model provides a locking structure, is applied to bolt taking device and accessory thereof, its characterized in that, locking structure includes knob and slip joint, wherein:

The sliding joint is used for being slidably arranged on the handle shell of the thrombus taking device or the accessory thereof so as to drive the corresponding outer sleeve to move; the knob is rotatably arranged on the sliding joint so as to enable the locking structure to be switched between a locking state and an unlocking state;

The knob is rotatable to a first position in positioning engagement with the housing to lock the slip joint with the locking structure in the locked state; with the locking structure in the unlocked state, the knob is rotatable to a second position that is disengaged from the housing to release the sliding joint.

2. The lock-out mechanism of claim 1, wherein one of the knob and the sliding joint is provided with a positioning recess and the other is provided with a first positioning projection, the positioning recess being snap-fittable with the first positioning projection during rotation of the knob relative to the sliding joint to position the knob in the first position or the second position.

3. The lock-up structure according to claim 2, wherein one of the knob and the sliding joint is provided with a rotation groove, and the other is provided with a second positioning projection, and the knob and the sliding joint are brought into rotational engagement by the rotation groove and the second positioning projection; wherein:

One of the positioning recess and the first positioning protrusion is arranged on the groove surface of the rotary groove, and the other of the positioning recess and the first positioning protrusion is arranged on the second positioning protrusion;

and/or at least one of the positioning recess and the first positioning protrusion is arranged on the elastic engagement arm of the corresponding base part.

4. The locking structure according to claim 1, wherein the knob has a ring-shaped structure to be sleeved on the circumference of the housing for rotation; the knob has at least two supporting protrusions distributed along the circumferential direction on the inner surface thereof, and the supporting protrusions are used for supporting on the outer surface of the shell during the rotation of the knob;

And/or the knob is provided with a first positioning part matched with the shell in a positioning way, the first positioning part is a third positioning protrusion, the third positioning protrusion is provided with a deformation space penetrating along a first direction, and the first direction is distributed along the rotation axial direction of the knob.

5. The locking structure of claim 4, wherein the knob has two gripping locations provided on an outer surface thereof, the two gripping locations being distributed along a same radial direction of the knob, wherein:

The holding position is dislocated with the supporting protrusion in the circumferential direction of the knob; or the at least two support protrusions comprise a first support protrusion and a second support protrusion, the first support protrusion corresponds to the holding position along the circumferential direction of the knob, the second support protrusion is dislocated with the holding position, and the height of the first support protrusion is smaller than that of the second support protrusion.

6. The locking structure of claim 1, wherein the sliding joint has a receiving channel, a distal side of the receiving channel being configured to receive the outer sleeve, a proximal side of the receiving channel being configured to be inserted into a built-in tube; the locking structure further comprises a sealing piece arranged on one side of the proximal end of the containing hole, and the sealing piece is used for sealing a gap between the built-in pipe fitting and the hole wall of the containing hole; wherein:

The sliding joint also comprises an exhaust duct, wherein the exhaust duct is connected between the sealing element and a part of the containing duct corresponding to the proximal end of the outer sleeve;

And/or the sliding joint comprises a first joint and a second joint, wherein the first joint is used for installing the knob, the second joint is used for installing the outer sleeve, and the sealing element is arranged at the joint of the first joint and the second joint.

7. The locking structure of claim 6, wherein the sliding joint comprises an exhaust branch pipe provided with the exhaust duct, the exhaust branch pipe can extend out of the housing through a sliding groove on the housing, and the sliding groove is used for sliding fit of the sliding joint on the housing;

The knob has with casing locate fit's first location portion, first location portion with exhaust branch pipe is followed the axial interval arrangement of locking structure, locking structure is configured so that under the condition that exhaust branch pipe butt in the distal end of spout, first location portion with the distal end location portion of casing corresponds, the casing passes through distal end location portion with knob locate fit.

8. A handle comprising the locking structure of any one of claims 1 to 7.

9. The thrombus taking device is characterized by comprising a first outer sleeve and the handle of claim 8, wherein the sliding joint is fixedly connected with the first outer sleeve and is used for driving the first outer sleeve to move.

10. A sheath assembly comprising a second outer sleeve and the handle of claim 8, wherein the slip joint is fixedly connected to the second outer sleeve for moving the second outer sleeve.