Handle locking structure, handle assembly and support conveying system

Abstract

The utility model provides a handle locking structure, a handle assembly and a support conveying system. The handle locking structure comprises a guide sliding sleeve, an adjusting sleeve and a clutch block. The guide rod is sleeved with the guide sliding sleeve; the guide sliding sleeve is sleeved with the adjusting sleeve, and a sleeve opening is formed in the side wall of the adjusting sleeve. The clutch block is located between the adjusting sleeve and the guide sliding sleeve, the clutch block is rotationally connected with the guide sliding sleeve, internal threads are locally arranged on the clutch block, the clutch block can be meshed with the guide rod, and the clutch block is locally located in the sleeve opening; the adjusting sleeve can move in a reciprocating mode in the axial direction relative to the guide sliding sleeve, and the moving positions of the adjusting sleeve comprise the locking position and the unlocking position. When the adjusting sleeve is located at the locking position, the end of the clutch block abuts against the adjusting sleeve in the sleeve opening in the axial direction, and the handle locking structure can rotate and move relative to the guide rod. When the adjusting sleeve is located at the unlocking position, the handle locking structure can linearly move relative to the guide rod. It is guaranteed that in the stent releasing process of the stent conveying system, switching between slow releasing and rapid releasing is rapid and stable.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, and particularly relates to a handle locking structure, a handle assembly and a stent delivery system. Background Art

[0002] In the treatment means of vascular intervention, in related technologies, a stent delivery system is usually required to safely and accurately place a stent into a patient's body. Generally, the stent needs to be first contracted in the sheath of the stent delivery system. When reaching the treatment position in the patient's body, by operating the handle assembly to drive the sheath, the sheath is retracted, and the stent is released and deployed without the constraint of the sheath. In the prior art, the stent is usually released step by step, and the stent delivery system is required to have a slow release function to ensure high release accuracy when the stent is initially released. Also, the stent delivery system is required to have a fast release function to quickly release the stent at an appropriate time according to the actual situation.

[0003] Therefore, how to ensure that the stent delivery system can quickly and stably switch between the two release states of slow release and fast release during the stent release process is particularly important. Summary of the Utility Model

[0004] In view of this, the utility model provides a handle locking structure, a handle assembly and a stent delivery system to solve the problem in the prior art of how to ensure that the stent delivery system can quickly and stably switch between the two release states of slow release and fast release during the stent release process.

[0005] To achieve the above purpose, the utility model provides the following technical solutions:

[0006] A handle locking structure is used to be sleeved on a guide rod provided with an external thread. The handle locking structure includes:

[0007] A guiding sliding sleeve is sleeved on the guide rod;

[0008] An adjusting sleeve is sleeved on the guiding sliding sleeve, and a sleeve opening is formed on the side wall of the adjusting sleeve;

[0009] A clutch block is located between the adjusting sleeve and the guiding sliding sleeve, and the clutch block is rotationally connected to the guiding sliding sleeve. A part of the clutch block is provided with an internal thread and can mesh with the guide rod, and a part of the clutch block is located in the sleeve opening;

[0010] Wherein,

[0011] The adjusting sleeve can reciprocate axially relative to the guiding sliding sleeve to drive the clutch block to rotate, and a part of the clutch block forms a sliding fit with the adjusting sleeve in the sleeve opening. The moving positions of the adjusting sleeve include: rotating the clutch block to a locked position where it remains engaged with the guide rod, and rotating the clutch block to an unlocked position where it is disengaged from the guide rod;

[0012] When the adjusting sleeve is in the locked position, the end of the clutch block abuts against the adjusting sleeve axially in the sleeve opening, and the handle locking structure can rotate and displace relative to the guide rod;

[0013] When the adjusting sleeve is in the unlocked position, the handle locking structure can linearly displace relative to the guide rod.

[0014] Optionally, an elastic member is further provided between the guiding sliding sleeve and the adjusting sleeve;

[0015] The elastic member can apply pressure to the adjusting sleeve so that the adjusting sleeve is located in the locked position when not subjected to an axial external force;

[0016] When the adjusting sleeve is subjected to an axial external force and compresses the elastic member, the adjusting sleeve can move to the unlocked position.

[0017] Optionally, the guiding sliding sleeve includes a sliding sleeve main body and a limiting flange. The limiting flange is arranged at one end of the sliding sleeve main body away from the clutch block, and the limiting flange and the sliding sleeve main body are of an integrally formed structure. The elastic member is a spring, and the spring is sleeved on the sliding sleeve main body and abuts against the end of the adjusting sleeve and the limiting flange at both ends respectively.

[0018] Optionally, an assembly through hole is formed in the side wall of the guiding sliding sleeve and an assembly groove is formed in the outer side surface. The assembly through hole and the assembly groove are distributed axially along the guiding sliding sleeve and are adjacent to each other, and a transfer shaft is provided between the assembly through hole and the assembly groove;

[0019] The clutch block includes an engaging section and a limiting section distributed axially along the guiding sliding sleeve. The engaging section is located in the assembly through hole and is provided with the internal thread, the limiting section is located in the assembly groove and at least partially exposes in the sleeve opening, and the connection position between the engaging section and the limiting section abuts against the transfer shaft;

[0020] When the adjusting sleeve is in the locked position, the adjusting sleeve is limited outside the engaging section. When the adjusting sleeve is in the unlocked position, the adjusting sleeve leaves the outside of the engaging section, and the limiting section forms an axial stop with the adjusting sleeve in the sleeve opening.

[0021] Optionally, a limiting rib is provided on the limiting section. When the adjusting sleeve is in the unlocking position, the limiting rib is located in the sleeve opening and abuts against the adjusting sleeve.

[0022] Optionally, at least one side of the two positions on the circumference of the assembly groove is provided with an avoidance groove communicating with the assembly groove. A limiting rib is provided on the limiting section. When the adjusting sleeve is in the unlocking position, the limiting rib rotates with the clutch block to be located in the avoidance groove to axially limit the clutch block.

[0023] Optionally, a reinforcing rib is provided on the surface of the clutch block facing the adjusting sleeve, and the reinforcing rib is in pressing contact with the adjusting sleeve.

[0024] Optionally, a guiding groove is provided on one of the outer side surface of the guiding sliding sleeve and the inner side surface of the adjusting sleeve. The guiding groove extends along the axial direction of the guiding sliding sleeve, and a guiding protrusion slidably matched with the guiding groove is provided on the other one.

[0025] Optionally, a plurality of clutch blocks are provided and are evenly distributed around the axis of the guiding sliding sleeve;

[0026] And / or, a plurality of internal threads are provided.

[0027] A handle assembly includes a handle housing and the handle locking structure in any one of the above. The handle housing is sleeved on the circumference of the handle locking structure, and the guiding sliding sleeve is axially limited and assembled with the handle housing. An operating block extending out of the handle housing is provided on the adjusting sleeve, so that the operating block can drive the adjusting sleeve and the handle housing to move axially and / or circumferentially.

[0028] A bracket conveying system includes the above-mentioned handle assembly.

[0029] The handle locking structure provided by the present utility model is used to be sleeved on a guide rod provided with an external thread. The handle locking structure includes a guiding sliding sleeve, an adjusting sleeve, and a clutch block. The guiding sliding sleeve is sleeved on the guide rod. The adjusting sleeve is sleeved on the guiding sliding sleeve, and a sleeve opening is formed on the side wall of the adjusting sleeve. The clutch block is located between the adjusting sleeve and the guiding sliding sleeve, and the clutch block is rotatably connected to the guiding sliding sleeve. A part of the clutch block is provided with an internal thread and can be engaged with the guide rod, and a part of the clutch block is located in the sleeve opening. Wherein, the adjusting sleeve can reciprocate axially relative to the guiding sliding sleeve to drive the clutch block to rotate and make a part of the clutch block form a sliding fit with the adjusting sleeve in the sleeve opening. The moving positions of the adjusting sleeve include: a locking position where the clutch block rotates to be engaged with the guide rod, and an unlocking position where the clutch block rotates to be disengaged from the guide rod. When the adjusting sleeve is in the locking position, the end of the clutch block abuts against the adjusting sleeve axially in the sleeve opening, and the handle locking structure can rotate and displace relative to the guide rod. When the adjusting sleeve is in the unlocking position, the handle locking structure can linearly displace relative to the guide rod. With such a setting, the guiding sliding sleeve, the adjusting sleeve, and the clutch block are integrally assembled to form a handle locking structure. Applying this handle locking structure to a stent delivery system, by adjusting the position of the adjusting sleeve to switch between the locking position and the unlocking position, the clutch block can be in a state of being threadedly engaged with the guide rod or disengaged from the guide rod as required. When the clutch block is in a state of being threadedly engaged with the guide rod, since a part of the clutch block is located in the sleeve opening of the adjusting sleeve, the adjusting sleeve and the clutch block can rotate synchronously in the circumferential direction due to the limiting block, and the adjusting sleeve can drive the clutch block to rotate when rotating, so as to realize that the handle locking structure can only generate a relative rotational displacement with the guide rod, so as to drive the sheath tube to displace slightly axially to achieve the purpose of slowly releasing the stent. When the clutch block is in a state of being disengaged from the guide rod, the handle locking structure can generate a relative linear displacement with the guide rod to drive the sheath tube to displace axially by a large amount to achieve the purpose of quickly releasing the stent, that is, the two states can be quickly switched by moving the adjusting sleeve. At the same time, since a part of the clutch block is located in the sleeve opening of the adjusting sleeve, the clutch block and the adjusting sleeve always maintain a reliable assembly relationship and will not come off, so that the moving result of the adjusting sleeve is stably in the two stent release states, improving the use safety of the instrument. Moreover, the adjusting sleeve and the clutch block form a linkage. When the adjusting sleeve is in the locking position, the movement of the adjusting sleeve drives the clutch block to rotate to a state where it abuts against the adjusting sleeve. In this way, the clutch block limits the adjusting sleeve to prevent the adjusting sleeve from falling off, and the two form an interlock, which is stable and reliable and is also beneficial to the user's quick operation, solving the problem in the prior art of how to ensure that the stent delivery system can quickly and stably switch between the two release states of slow release and quick release during the stent release process. In addition, the handle locking structure provided by the present utility model has a simple structure composition and also has the advantage of being easy to assemble. Description of the Drawings

[0030] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings in the following description are only embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the provided drawings without paying creative work.

[0031] Figure 1 A schematic diagram of a partial structure of a stent delivery system provided by an embodiment of the utility model;

[0032] Figure 2 A cross-sectional view of the adjustment sleeve of the handle locking structure provided by the embodiment of the utility model in the locked position;

[0033] Figure 3 A cross-sectional view of the adjustment sleeve of the handle locking structure provided by the embodiment of the utility model in the unlocked position;

[0034] Figure 4 A cross-sectional view of a clutch block provided in an embodiment of the utility model;

[0035] Figure 5 An axonometric view of a guide sleeve provided in an embodiment of the utility model;

[0036] Figure 6 A cross-sectional view of a guide sleeve provided in an embodiment of the utility model;

[0037] Figure 7 A schematic cross-sectional view of a handle assembly provided in an embodiment of the utility model.

[0038] exist Figures 1 - 7 middle:

[0039] 1. Guide rod; 2. Guide sleeve; 3. Adjustment sleeve; 4. Clutch block; 5. Spring; 6. Handle housing;

[0040] 11. External thread;

[0041] 21. Limiting flange; 22. Assembly through hole; 23. Assembly groove; 24. Adapter shaft; 25. Guide groove; 26. Avoidance groove;

[0042] 31. socket; 32. operation block;

[0043] 41. Engaging section; 42. Limiting section; 43. Internal thread; 44. Limiting rib. DETAILED DESCRIPTION

[0044] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all the embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative efforts shall fall within the protection scope of the present utility model.

[0045] In a stent delivery system, generally, a handle assembly and a sheath are circumferentially sleeved on a guide rod. The handle assembly can drive the sheath to move along the guide rod to release the stent.

[0046] As Figures 1 - 6 shown, the embodiment of the present utility model provides a handle locking structure for sleeving on a guide rod 1 provided with an external thread 11. The guide rod 1 is provided with a hollow structure extending axially, and the hollow structure is used for a guide wire to extend therein; the handle locking structure includes a guiding sliding sleeve 2, an adjusting sleeve 3 and a clutch block 4; the guiding sliding sleeve 2 is sleeved on the guide rod 1; the adjusting sleeve 3 is sleeved on the guiding sliding sleeve 2, and a sleeve opening 31 is formed on the side wall of the adjusting sleeve 3; the clutch block 4 is located between the adjusting sleeve 3 and the guiding sliding sleeve 2, and the middle position of the clutch block 4 is rotatably connected to the guiding sliding sleeve 2. The rotation axis of the clutch block 4 is perpendicular to the axis of the guide rod 1. A partial internal thread 43 is provided on the clutch block 4 and can mesh with the guide rod 1, and a part of the clutch block 4 is located in the sleeve opening 31; wherein, the adjusting sleeve 3 can reciprocate axially relative to the guiding sliding sleeve 2 to drive the clutch block 4 to rotate within a small range, and make a part of the clutch block 4 form a sliding fit with the adjusting sleeve 3 in the sleeve opening 31. The sleeve opening 31 is a through-hole structure penetrating the inner and outer walls formed on the side wall of the adjusting sleeve 3. The moving positions of the adjusting sleeve 3 include: rotating the clutch block 4 to a locked position where it remains meshed with the guide rod 1, and rotating the clutch block 4 to an unlocked position where it is disengaged from the guide rod 1; when the adjusting sleeve 3 is in the locked position, the end of the clutch block 4 abuts against the adjusting sleeve 3 axially in the sleeve opening 31, and the handle locking structure can rotate and displace relative to the guide rod 1; when the adjusting sleeve 3 is in the unlocked position, the handle locking structure can linearly displace relative to the guide rod 1. It should be noted that the internal thread 43 of the clutch block 4 is not a complete circle, but is matched with the partial external thread 11 and can enable the clutch block 4 to rotate and displace along the external thread 11; the small-range rotation of the clutch block 4 relative to the guiding sliding sleeve 2 can be regarded as a seesaw-type or lever-type reciprocating rotation.

[0047] With such a setting, the guiding sliding sleeve 2, the adjusting sleeve 3 and the clutch block 4 are integrally assembled to form a handle locking structure. When this handle locking structure is applied to the stent delivery system, by adjusting the position of the adjusting sleeve 3 to switch between the locked position and the unlocked position, the clutch block 4 can be made to be in a state of being threadedly engaged with the guide rod 1 or disengaged from the guide rod 1 as required, and the clutch block 4 is held in the engaged and disengaged positions with the guide rod 1 by the restraint of the adjusting sleeve 3 on the clutch block 4; when the clutch block 4 is in a state of being threadedly engaged with the guide rod 1, the handle locking structure can only generate a relative rotational displacement with the guide rod 1 to drive the sheath tube to displace axially by a small amount, so as to achieve the purpose of slowly releasing the stent; when the clutch block 4 is in a state of being disengaged from the guide rod 1, since a part of the clutch block 4 is located in the socket 31 of the adjusting sleeve 3, the adjusting sleeve 3 and the clutch block 4 can rotate synchronously in the circumferential direction due to the limit and block between them, and when the adjusting sleeve 3 rotates, it can drive the clutch block 4 to rotate, and the handle locking structure can generate a relative linear displacement with the guide rod 1 to drive the sheath tube to displace axially by a large amount, so as to achieve the purpose of quickly releasing the stent, that is, the movement of the adjusting sleeve 3 can realize the quick switching between the two states; at the same time, since a part of the clutch block 4 is located in the socket 31 of the adjusting sleeve 3, the clutch block 4 and the adjusting sleeve 3 always maintain a reliable assembly relationship and will not come off, so that the movement result of the adjusting sleeve 3 is stable in the two stent release states, improving the use safety of the instrument, and the adjusting sleeve 3 and the clutch block 4 form a linkage. When the adjusting sleeve 3 is in the locked position, the movement of the adjusting sleeve 3 drives the clutch block 4 to rotate to a state where it abuts against the adjusting sleeve 3. In this way, the clutch block 4 forms a limit on the adjusting sleeve 3 to prevent the adjusting sleeve 3 from falling out, and the two form an interlock, which is stable and reliable and is also beneficial to the user's quick operation, solving the problem in the prior art of how to ensure that the stent delivery system can quickly and stably switch between the two release states of slow release and quick release during the stent release process. Moreover, the handle locking structure provided by the present utility model has a simple structure composition and also has the advantage of being easy to assemble.

[0048] In a preferred embodiment, the handle locking structure provided by the present utility model further includes an elastic member disposed between the guiding sliding sleeve 2 and the adjusting sleeve 3; the elastic member can apply an axial pressure to the adjusting sleeve 3 so that the adjusting sleeve 3 is located at the locked position when not subjected to an external axial force; when the adjusting sleeve 3 is subjected to an external axial force and compresses the elastic member, the adjusting sleeve 3 can move to the unlocked position.

[0049] With such a configuration, the elastic member has a reset function. When no axial external force is applied by the user, the adjustment sleeve 3 is normally in a state where the clutch block 4 is engaged with the guide rod 1, so that the user can concentrate on performing only the rotation operation to slowly release the bracket, which is conducive to the convenience and safety of operation; and when an axial external force is applied to the adjustment sleeve 3 to move the adjustment sleeve 3 and squeeze the elastic member, if the direction of this action is consistent with the retreat direction of the handle assembly, the handle assembly can be driven backward to achieve a quick release of the bracket, which is in line with the human body's movement habits. In addition, when the adjustment sleeve 3 is in the locked position, since the end of the clutch block 4 is axially against the adjustment sleeve 3 in the sleeve opening 31, the adjustment sleeve 3 can apply a locking force to the clutch block 4 under the thrust of the elastic member, making the overall structural stability higher.

[0050] The elastic member may be in the form of a spring 5 or a metal spring.

[0051] Furthermore, the guide sleeve 2 includes a sleeve body and a limit flange 21. The limit flange 21 is arranged at one end of the sleeve body away from the clutch block 4, and the limit flange 21 and the sleeve body are an integrally formed structure. The elastic member is a spring 5, specifically a compression spring. The spring 5 is sleeved on the sleeve body and its two ends are respectively abutted against the end of the adjustment sleeve 3 and the limit flange 21.

[0052] With such arrangement, the simplified assembly design of the guide sleeve 2, the adjustment sleeve 3 and the clutch block 4 in the utility model enables the spring 5 to only form an assembly relationship with the guide sleeve 2 and the adjustment sleeve 3. During the assembly process, the side of the limiting flange 21 can be used as the assembly end of the spring 5. The spring 5 can be directly sleeved onto the sleeve body through the limiting flange 21, making the spring 5 easier to assemble in the overall structure and more efficient in assembly.

[0053] Of course, in addition to the above-mentioned method of arranging the elastic member, it is also feasible to realize the movement and stopping of the position of the adjusting sleeve 3 by means of a damping assembly between the adjusting sleeve 3 and the guide sliding sleeve 2 .

[0054] In a specific embodiment, a mounting through hole 22 is formed on the side wall of the guide sleeve 2 and a mounting groove 23 is formed on the outer side, or the outer side of the guide sleeve 2 is partially thinned to form the mounting groove 23, the mounting through hole 22 and the mounting groove 23 are distributed and adjacent along the axial direction of the guide sleeve 2, and a transfer shaft 24 is provided between the mounting through hole 22 and the mounting groove 23;

[0055] The clutch block 4 is an irregular block. The clutch block 4 includes an engaging section 41 and a limiting section 42 distributed along the axial direction of the guiding sliding sleeve 2. The limiting section 42 gradually tilts away from the guiding sliding sleeve 2 relative to the engaging section 41, so that the limiting section 42 can partially extend into the sleeve opening 31. And the thickness of the limiting section 42 is thinner than that of the engaging section 41, so that a step is formed at the connection position between the two. The engaging section 41 is located in the assembly through hole 22 and is provided with an internal thread 43. The limiting section 42 is located in the assembly groove 23 and at least partially exposes in the sleeve opening 31. The connection position between the engaging section 41 and the limiting section 42 abuts against the transfer shaft 24, enabling the clutch block 4 to generate a small swing of the seesaw type;

[0056] When the adjusting sleeve 3 is in the locked position, the adjusting sleeve 3 is limited outside the engaging section 41. The engaging section 41 remains engaged with the guide rod 1. The limiting section 42 tilts relative to the engaging section 41, and the degree of tilting of the limiting section 42 is designed such that the adjusting sleeve 3 cannot slip off it. When the adjusting sleeve 3 is in the unlocked position, the adjusting sleeve 3 leaves the outside of the engaging section 41, and the limiting section 42 forms an axial stop with the adjusting sleeve 3 in the sleeve opening 31.

[0057] With such a setting, the guiding sliding sleeve 2 is an integral structure. Through a clever structural design, the assembly with the clutch block 4 and the adjusting sleeve 3 is realized, avoiding the problem of increased assembly difficulty caused by the split design of the guiding sliding sleeve 2 in some handle assemblies in the prior art. Moreover, when the adjusting sleeve 3 is in the locked position, the adjusting sleeve 3 is limited outside the engaging section 41, so that the threaded locking force between the clutch block 4 and the guide rod 1 is strong, which can avoid the hidden danger of loose threaded fit and easy slippage between the handle assembly and the guide rod 1, and is beneficial to preventing the problems of difficult release or release failure of the bracket.

[0058] In a preferred embodiment, a protruding limiting rib 44 is provided on the outer side surface of the limiting section 42. When the adjusting sleeve 3 is in the unlocked position, the limiting rib 44 is located in the sleeve opening 31 and abuts against the adjusting sleeve 3. With such a setting, the limiting rib 44 is an optimized design that is beneficial to further strengthening the reliability of the assembly between the clutch block 4 and the adjusting sleeve 3 and enhancing the safety and reliability of the handle locking structure.

[0059] In a preferred embodiment, the guiding sliding sleeve 2 is further provided with an avoidance groove 26. Among the positions on both sides in the circumferential direction of the assembly groove 23, at least one side is provided with an avoidance groove 26 communicating with the assembly groove 23. The limiting section 42 is provided with a limiting rib 44. When the adjusting sleeve 3 is in the unlocked position, the limiting rib 44 rotates with the clutch block 4 to be located in the avoidance groove 26 to axially limit the clutch block 4. Preferably, two avoidance grooves 26 symmetrically arranged with respect to the assembly groove 23 are provided.

[0060] With such arrangement, when the adjusting sleeve 3 moves to the unlocking position, the clutch block 4 is driven to rotate until the limiting rib 44 falls into the avoidance groove 26, thereby preventing the clutch block 4 from deflecting or slipping along the axial direction, thereby enhancing the safety and reliability of the handle locking structure.

[0061] For example, Figure 5 and Figure 7 In the illustrated embodiment, the limiting rib 44 can cooperate with the avoidance groove 26 of the guide sleeve 2 , and the limiting rib 44 can be located in the sleeve opening 31 and abut against the adjustment sleeve 3 .

[0062] In another preferred embodiment, a reinforcing rib is provided on the side of the clutch block 4 facing the adjustment sleeve 3, and the reinforcing rib is in extrusion contact with the adjustment sleeve 3. In this way, the reinforcing rib is used to closely contact with the inner side of the adjustment sleeve 3, increasing the friction between the two, making the connection tighter, thereby preventing the clutch block 4 from shaking and enhancing the safety and reliability of the handle locking structure.

[0063] In another specific embodiment, a guide groove 25 is provided on one of the outer side surface of the guide sleeve 2 and the inner side surface of the adjustment sleeve 3, and the guide groove 25 extends along the axial direction of the guide sleeve 2, and a guide protrusion that slides with the guide groove 25 is provided on the other side, that is, the guide groove 25 and the guide protrusion form a plug-in relationship in the radial direction. The guide groove 25 can be optionally set in the form of a rectangular groove, an arc groove or a V-shaped groove. The figure exemplarily shows an implementation method in which the guide sleeve 2 is provided with a V-shaped guide groove and the adjustment sleeve 3 is provided with a V-shaped guide protrusion.

[0064] Such an arrangement ensures that the adjustment sleeve 3 can produce smooth axial relative displacement along the guide sleeve 2, and at the same time, when the adjustment sleeve 3 needs to be rotated so that the handle locking structure as a whole can be rotated and displaced under the guidance of the clutch block 4, the cooperation between the guide groove 25 and the guide protrusion can stably and reliably transmit the torque.

[0065] In another preferred embodiment, the clutch block 4 is provided with a plurality of evenly distributed around the axis of the guide sleeve 2, and correspondingly, the guide sleeve 2 is provided with a plurality of groups of assembly through holes 22 and assembly grooves 23. In this way, when in use, the plurality of clutch blocks 4 are evenly stressed, and the guide rod 1 is symmetrically stressed, thereby preventing the guide rod 1 and the clutch block 4 from being damaged or missing and causing the bracket to be unable to be released.

[0066] Specifically, two clutch blocks 4 symmetrically distributed at 180° may be provided; or, four clutch blocks 4 distributed in a circular array in the circumferential direction of the guide sleeve 2 may be provided.

[0067] In another preferred embodiment, multiple parallel internal threads 43 are provided on the clutch block 4, and the pitch of the internal threads 43 is the same as that of the external threads 11 of the guide rod 1. In this way, the multiple internal threads 43 make the engagement between the clutch block 4 and the guide rod 1 closer and the engagement area larger when they are assembled, so that the locking force of the handle locking structure is higher, which is beneficial to bearing a higher release force during the slow release of the bracket.

[0068] Based on the above handle locking structure, an embodiment of the present invention further provides a handle assembly, as Figure 7 shown. The handle assembly includes a handle housing 6 and the above handle locking structure. The handle housing 6 is sleeved on the circumference of the handle locking structure, and the guiding sliding sleeve 2 is axially limitedly assembled with the handle housing 6, that is, the two move synchronously axially. An operating block 32 extending from the inside of the handle housing 6 is provided on the adjusting sleeve 3, and a strip-shaped groove is formed on the handle housing 6 to provide a moving range for the operating block 32, so that the operating block 32 can drive the adjusting sleeve 3 and the handle housing 6 to move axially and / or circumferentially. The operating block 32 facilitates the user to perform the action of adjusting the position of the adjusting sleeve 3. Since the handle assembly has the above handle locking structure, the beneficial effects brought by the handle locking structure to the handle assembly can be seen in the above content and will not be elaborated here.

[0069] Based on the above handle assembly, an embodiment of the present invention further provides a stent delivery system, and the stent delivery system includes the above handle assembly. Since the stent delivery system has the above handle assembly, the beneficial effects brought by the handle assembly to the stent delivery system can be seen in the above content and will not be elaborated here.

[0070] The basic principles of the present invention have been described above in conjunction with specific embodiments. However, it should be noted that the advantages, advantages, effects, etc. mentioned in the present invention are only examples and not limitations. It cannot be considered that these advantages, advantages, effects, etc. are essential for each embodiment of the present invention. In addition, the above disclosed specific details are only for the purpose of illustration and easy understanding, rather than limitations. The above details do not limit the present invention to necessarily adopt the above specific details to implement.

[0071] The block diagrams of the devices, apparatuses, equipment, and systems involved in the present utility model are only illustrative examples and are not intended to require or imply that they must be connected, arranged, and configured in the manner shown in the block diagrams. As those skilled in the art will recognize, these devices, apparatuses, equipment, and systems can be connected, arranged, and configured in any manner. Words such as "comprising", "including", "having", etc. are open-ended words, meaning "including but not limited to", and can be used interchangeably with each other. The words "or" and "and" used herein refer to the phrase "and / or", and can be used interchangeably with it, unless the context clearly indicates otherwise. The word "such as" used herein refers to the phrase "such as but not limited to", and can be used interchangeably with it.

[0072] It should also be noted that in the devices, equipment, and methods of the present utility model, each component or each step can be decomposed and / or recombined. These decompositions and / or recombinations should be regarded as equivalent solutions of the present utility model.

[0073] The above description of the disclosed aspects is provided to enable any person skilled in the art to make or use the present utility model. Various modifications to these aspects will be very apparent to those skilled in the art, and the general principles defined herein can be applied to other aspects without departing from the scope of the present utility model. Therefore, the present utility model is not intended to be limited to the aspects shown herein, but rather to the broadest scope consistent with the principles and novel features disclosed herein.

[0074] It should be understood that the qualifiers "first", "second", "third", "fourth", "fifth", and "sixth" used in the description of the embodiments of the present utility model are only for more clearly elaborating the technical solutions and cannot be used to limit the protection scope of the present utility model.

[0075] The above description has been given for purposes of illustration and description. In addition, this description is not intended to limit the embodiments of the present utility model to the forms disclosed herein. Although multiple example aspects and embodiments have been discussed above, those skilled in the art will recognize certain variations, modifications, changes, additions, and sub-combinations thereof.

Claims

1. A handle locking structure, characterized in that: Used to be sleeved on a guide rod (1) provided with an external thread (11), the handle locking structure comprises: A guide sleeve (2) sleeved on the guide rod (1); An adjusting sleeve (3) is sleeved on the guide sliding sleeve (2), and a sleeve opening (31) is formed on a side wall of the adjusting sleeve (3); a clutch block (4) located between the adjustment sleeve (3) and the guide sleeve (2), and the clutch block (4) is rotatably connected to the guide sleeve (2), a portion of the clutch block (4) is provided with an internal thread (43) and can be engaged with the guide rod (1), and a portion of the clutch block (4) is located in the sleeve opening (31); in, The adjusting sleeve (3) can reciprocate axially relative to the guide sleeve (2) to drive the clutch block (4) to rotate, and a part of the clutch block (4) forms a sliding fit with the adjusting sleeve (3) in the sleeve opening (31), and the moving position of the adjusting sleeve (3) includes: rotating the clutch block (4) to a locking position where it remains engaged with the guide rod (1), and rotating the clutch block (4) to an unlocking position where it is disengaged from the guide rod (1); When the adjustment sleeve (3) is in the locking position, the end of the clutch block (4) abuts against the adjustment sleeve (3) along the axial direction in the sleeve opening (31), and the handle locking structure can be rotated relative to the guide rod (1); When the adjustment sleeve (3) is in the unlocking position, the handle locking structure can be linearly displaced relative to the guide rod (1).

2. The handle locking structure according to claim 1, characterized in that: It also includes an elastic member arranged between the guide sleeve (2) and the adjustment sleeve (3); The elastic member can apply pressure to the adjusting sleeve (3) so that the adjusting sleeve (3) is located at the locking position when no axial external force is applied; When the adjusting sleeve (3) is subjected to an axial external force and presses the elastic member, the adjusting sleeve (3) can move to the unlocking position.

3. The handle locking structure according to claim 2, characterized in that: The guide sleeve (2) comprises a sleeve body and a limiting flange (21); the limiting flange (21) is arranged at one end of the sleeve body away from the clutch block (4), and the limiting flange (21) and the sleeve body are an integrally formed structure; the elastic member is a spring (5); the spring (5) is sleeved on the sleeve body and its two ends are respectively in contact with the end of the adjustment sleeve (3) and the limiting flange (21).

4. The handle locking structure according to claim 1, characterized in that: The side wall of the guide sleeve (2) is provided with an assembly through hole (22) and the outer side surface is provided with an assembly groove (23), the assembly through hole (22) and the assembly groove (23) are distributed and adjacent along the axial direction of the guide sleeve (2), and a transfer shaft (24) is provided between the assembly through hole (22) and the assembly groove (23); The clutch block (4) comprises an engagement section (41) and a limiting section (42) distributed along the axial direction of the guide sleeve (2); the engagement section (41) is located in the assembly through hole (22) and is provided with the internal thread (43); the limiting section (42) is located in the assembly groove (23) and is at least partially exposed in the sleeve opening (31); the connection position between the engagement section (41) and the limiting section (42) abuts against the transfer shaft (24); When the adjusting sleeve (3) is in the locking position, the adjusting sleeve (3) is limited on the outside of the engaging section (41); when the adjusting sleeve (3) is in the unlocking position, the adjusting sleeve (3) leaves the outside of the engaging section (41), and the limiting section (42) forms a stop in the sleeve opening (31) and with the adjusting sleeve (3) in the axial direction.

5. The handle locking structure according to claim 4, characterized in that: The limiting section (42) is provided with a limiting convex rib (44), and when the adjusting sleeve (3) is in the unlocking position, the limiting convex rib (44) is located in the sleeve opening (31) and abuts against the adjusting sleeve (3); Alternatively, a reinforcing rib is provided on a surface of the clutch block (4) facing the adjusting sleeve (3), and the reinforcing rib is in compression contact with the adjusting sleeve (3).

6. The handle locking structure according to claim 4, characterized in that: At least one of the positions on both sides of the assembling groove (23) in the circumferential direction is provided with an avoidance groove (26) communicating with the assembling groove (23), and the limiting section (42) is provided with a limiting convex rib (44). When the adjustment sleeve (3) is in the unlocking position, the limiting convex rib (44) rotates with the clutch block (4) to be located in the avoidance groove (26) so as to limit the axial position of the clutch block (4).

7. The handle locking structure according to claim 1, characterized in that: A guide groove (25) is provided on one of the outer side surface of the guide sleeve (2) and the inner side surface of the adjustment sleeve (3), the guide groove (25) extending along the axial direction of the guide sleeve (2), and a guide protrusion slidingly matched with the guide groove (25) is provided on the other side.

8. The handle locking structure according to claim 1, characterized in that: The clutch block (4) is provided with a plurality of evenly distributed ones around the axis of the guide sleeve (2); And / or, the internal thread (43) is provided with a plurality of threads.

9. A handle assembly, characterized in that: It comprises a handle housing (6) and a handle locking structure as claimed in any one of claims 1 to 8, wherein the handle housing (6) is sleeved on the circumference of the handle locking structure, and the guide sleeve (2) is axially limitedly assembled with the handle housing (6), and the adjustment sleeve (3) is provided with an operating block (32) extending from the handle housing (6), so that the operating block (32) can drive the adjustment sleeve (3) and the handle housing (6) to move axially and / or circumferentially.

10. A stent delivery system, characterized in that: Comprising the handle assembly of claim 9.

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