Handle assembly for medical device delivery and delivery device

Abstract

The utility model discloses a handle assembly and conveyor for medical instrument delivery, include: handle main part, outer sheath connecting piece and fixer, outer sheath connecting piece and fixer are located handle main part in, and can be linearly moved along the axial direction relative to handle main part, fixer is connected with outer sheath connecting piece and can rotate around the axis of outer sheath connecting piece, be provided with the unlocking button on fixer, make fixer rotate through the unlocking button of jockeying, be provided with the blocking groove and the retreat groove of intercommunication on handle main part, the retreat groove is along the axial direction of handle main part and is established, the blocking groove is along the circumferential direction of handle main part and is established, and the unlocking button can enter the retreat groove from the blocking groove in the mode of rotation, and can slide in the retreat groove. The utility model has realized the axial position of outer sheath connecting piece can be limited, avoids the instrument function failure caused by the retreat of outer sheath caused by transportation vibration and artificial misoperation possibly, and also can release the restriction to outer sheath connecting piece after reaching the lesion, makes outer sheath connecting piece can freely retreat the technical effect.

Description

Technical Field

[0001] This utility model relates to the field of medical equipment technology, and more specifically, to a handle assembly and conveyor for delivering medical devices. Background Technology

[0002] Interventional therapy is a new technology that has been applied in clinical practice in recent years. It involves pre-loading an implantable medical device into a delivery system, then introducing it into the human body, and releasing the medical device to the lesion site under the monitoring of a fluoroscopic device to achieve the therapeutic purpose. For example, in the treatment of cardiovascular diseases, a stent is delivered to the lesion through a delivery system, and then the stent is released to expand and support the blood vessel wall.

[0003] During release, the outer sheath connector needs to be retracted via the handle to expose the stent. The retraction process typically involves applying a backward pushing or pulling force to the outer sheath connector. During the procedure, it is crucial to prevent misoperation of the outer sheath connector before the stent reaches the lesion, which could lead to instrument malfunction. Similarly, it is essential to avoid potential instrument malfunction due to vibrations during transport that could cause the outer sheath to retract. Utility Model Content

[0004] The main objective of this invention is to provide a handle assembly for medical device delivery, in order to solve the problem in related technologies where the outer sheath connector is easily retracted due to misoperation during transportation or surgery, leading to device malfunction.

[0005] To achieve the above objectives, this utility model provides a handle assembly for medical device delivery, comprising: a handle body, an outer sheath connector, and a retainer; wherein,

[0006] The outer sheath connector and the retainer are located inside the handle body and can move linearly along the axial direction relative to the handle body;

[0007] The retainer is connected to the outer sheath connector and can rotate about the axis of the outer sheath connector;

[0008] The fixture is equipped with an unlock button, which can be turned to rotate the fixture.

[0009] The handle body is provided with a connecting blocking groove and a retraction groove. The retraction groove is arranged along the axial direction of the handle body, and the blocking groove is arranged along the circumferential direction of the handle body. The unlock button can rotate from the blocking groove into the retraction groove and slide within the retraction groove.

[0010] Furthermore, the handle body includes a first housing and a second housing, which are disposed opposite to each other and fastened together. The blocking groove and the retraction groove are both provided on the first housing.

[0011] Furthermore, the unlock button includes a pressing part and a connecting part. The connecting part is fixedly connected to the outer wall of the retainer. The pressing part protrudes from the handle body. The connecting part is slidably connected to the blocking groove and the retraction groove.

[0012] Furthermore, guide grooves are provided on both sides of the connecting part, and the side walls of the retraction groove extend into the guide groove and are slidably connected to the guide groove.

[0013] Furthermore, a first guide slope is provided on the outer side of the sidewall, and a second guide slope that fits into the guide groove is provided in the guide groove. The first guide slope and the second guide slope cooperate to guide the movement of the connecting part.

[0014] Furthermore, the connecting part is also provided with a support protrusion, which is opposite to the second guide inclined surface and abuts against the inner surface of the side wall. The surface of the support protrusion that abuts against the side wall is a convex arc-shaped surface, and the surface of the side wall that abuts against the support protrusion is a plane.

[0015] Furthermore, it also includes a locking structure, which is disposed between the outer sheath connector and the retainer, and the locking structure is used to lock the rotation angle of the retainer.

[0016] Furthermore, the locking structure includes a spring-loaded ball and a positioning groove, wherein the spring-loaded ball is located on the rear end face of the outer sheath connector, and the positioning groove is located on the front end face of the retainer; or,

[0017] The spring top ball is located on the front end face of the retainer, and the positioning groove is located on the rear end face of the outer sheath tube connector.

[0018] Furthermore, at least two positioning slots are provided and distributed circumferentially along the retainer, one of the positioning slots is used to cooperate with the spring top ball to restrict the unlocking button in the blocking slot, and the other positioning slot is used to cooperate with the spring top ball to restrict the unlocking button in the retraction slot.

[0019] Furthermore, the outer sheath connector includes a sheath joint and a connecting rod, the connecting rod being inserted to fix the outer sheath, the fixing device being connected to the sheath joint and rotatable relative to the sheath joint.

[0020] Furthermore, a connecting hook is provided on the rear end face of the sheath connector, and a connecting groove is provided on the inner wall of the fixer. The connecting hook is hooked into the connecting groove and can rotate within the connecting groove.

[0021] Furthermore, the inner wall of the retainer is provided with an arc-shaped flange, and the flange is provided with a notch, through which the hook can pass;

[0022] The retainer is provided with an arc-shaped clip, and a sealing head is provided on one end of the arc-shaped clip facing the sheath connector. The sealing head is inserted and engaged with the notch to seal the notch. The arc-shaped clip is fixed to the inner wall of the retainer, and there is a gap between the front end of the arc-shaped clip and the rear end of the flange to form the connecting groove.

[0023] Furthermore, a limiting protrusion is provided on one end of the flange near the notch, which can abut against the end face of the arc-shaped clip during assembly.

[0024] According to another aspect of this application, a medical device delivery device is provided, comprising: a sheath assembly, a handle body, and the aforementioned handle assembly;

[0025] The sheath assembly includes an outer sheath and a sheath core assembly. The outer sheath is movably inserted into the handle body and fixedly connected to the outer sheath connector. The sheath core assembly is movably inserted into the outer sheath.

[0026] In this embodiment of the utility model, a handle body, an outer sheath tube connector, and a retainer are provided. The outer sheath tube connector and the retainer are located inside the handle body and can move linearly along the axial direction relative to the handle body. The retainer is connected to the outer sheath tube connector and can rotate around the axis of the outer sheath tube connector. An unlocking button is provided on the retainer, and the retainer can be rotated by tossing the unlocking button. A connecting blocking groove and a retraction groove are provided on the handle body. The retraction groove is arranged along the axial direction of the handle body, and the blocking groove is arranged along the circumference of the handle body. The unlocking button can rotate from the blocking groove into the retraction groove and slide within the retraction groove.

[0027] During delivery, the unlock button can be held within the blocking groove on the handle body. This groove restricts the axial movement of the unlock button, thus limiting the axial movement of the fixator and the outer sheath connector. Upon reaching the lesion location, the unlock button can be activated, causing the fixator to rotate relative to the outer sheath connector. This disengages the unlock button from the blocking groove and moves it into the retraction groove. The unlock button can then move axially distally within the retraction groove, allowing the fixator and outer sheath connector to retract relative to the handle body, thus enabling the outer sheath to retract.

[0028] This invention achieves the technical effect of restricting the axial position of the outer sheath tube connector, which can prevent the outer sheath tube from being pulled back due to accidental pulling of the outer sheath tube connector during surgery or due to vibration during transportation. It can also release the restriction on the outer sheath tube connector after reaching the lesion, allowing the outer sheath tube connector to retract freely. This solves the problem in related technologies where the outer sheath tube connector is easily retracted due to misoperation during transportation or stent placement. Attached Figure Description

[0029] The accompanying drawings, which form part of this utility model, are used to provide a further understanding of the utility model, making other features, objects, and advantages of the utility model more apparent. The illustrative embodiments of the utility model and their descriptions are used to explain the utility model and do not constitute an undue limitation of the utility model. In the drawings:

[0030] Figure 1 This is a structural schematic diagram of the handle assembly according to an embodiment of the present utility model;

[0031] Figure 2 This is an exploded view of the handle assembly according to an embodiment of the present invention;

[0032] Figure 3 This is a cross-sectional view of the assembly of the unlock button and the retraction slot according to an embodiment of the present utility model;

[0033] Figure 4 This is an exploded structural diagram of the sheath connector and fixator according to an embodiment of this utility model;

[0034] Figure 5 This is a schematic diagram of the assembly structure of the sheath connector and the fixator according to an embodiment of this utility model;

[0035] Figure 6 This is another exploded structural diagram of the sheath connector and fixator according to an embodiment of this utility model;

[0036] Figure 7 This is a cross-sectional view of the assembled sheath connector and fixator according to an embodiment of the present invention;

[0037] The components include: 1. Handle body; 100. First housing; 101. Second housing; 102. Blocking groove; 103. Retracting groove; 1030. First guide slope; 1031. Side wall; 14. Outer sheath connector; 140. Connecting rod; 141. Sheath connector; 1410. Connecting hook; 19. Fixer; 191. Flange; 192. Notch; 193. Arc-shaped clip; 194. Sealing head; 195. Connecting groove; 196. Limiting protrusion; 21. Locking structure; 210. Spring ball; 211. Positioning groove; 22. Unlocking button; 220. Pressing part; 221. Connecting part; 2210. Guide groove; 2211. Second guide slope; 2212. Support protrusion. Detailed Implementation

[0038] To enable those skilled in the art to better understand the present invention, the technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present invention, and not all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those skilled in the art without creative effort should fall within the protection scope of the present invention.

[0039] It should be noted that the terms "first," "second," etc., used in the specification, claims, and accompanying drawings of this utility model are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate for the embodiments of this utility model described herein.

[0040] In this invention, the terms "upper," "lower," "inner," etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. These terms are primarily for the purpose of better describing this invention and its embodiments, and are not intended to limit the indicated device, element, or component to having a specific orientation, or to be constructed and operated in a specific orientation.

[0041] Furthermore, in addition to indicating direction or positional relationship, some of the aforementioned terms may also have other meanings. For example, the term "above" may also be used in some cases to indicate a certain dependency or connection relationship. Those skilled in the art can understand the specific meaning of these terms in this utility model according to the specific circumstances.

[0042] Furthermore, the terms "set up," "equipped with," "connected," and "fixed" should be interpreted broadly. For example, "connected" can be a fixed connection, a detachable connection, or an integral structure; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, or it can be an internal connection between two devices, components, or parts. Those skilled in the art can understand the specific meaning of the above terms in this utility model according to the specific circumstances.

[0043] In addition, the term "multiple" should mean two or more.

[0044] It should be noted that, where there is no conflict, the embodiments and features in the embodiments of this utility model can be combined with each other. The present utility model will now be described in detail with reference to the accompanying drawings and embodiments.

[0045] To solve related technical problems, such as Figure 1 and Figure 2 As shown, this embodiment of the present invention provides a handle assembly for delivering medical devices, including: a handle body 1, an outer sheath connector 14, and a fixator 19; wherein,

[0046] The outer sheath connector 14 and the retainer 19 are located inside the handle body 1 and can move linearly along the axial direction relative to the handle body 1;

[0047] The retainer 19 is connected to the outer sheath connector 14 and can rotate about the axis of the outer sheath connector 14;

[0048] The fastener 19 is provided with an unlock button 22, which can be turned to rotate the fastener 19.

[0049] The handle body 1 is provided with a connecting blocking groove 102 and a retraction groove 103. The retraction groove 103 is arranged along the axial direction of the handle body 1, and the blocking groove 102 is arranged along the circumferential direction of the handle body 1. The unlocking button 22 can rotate from the blocking groove 102 into the retraction groove 103 and slide within the retraction groove 103.

[0050] Medical device delivery systems are used to deliver implantable medical devices to the lesion site within the body and to release the implantable medical device. Taking a stent as an example, the delivery system mainly includes a handle assembly, an outer sheath and a core assembly connected to the handle assembly. The stent can be loaded into the loading space at the front end of the outer sheath and core assembly, where it is in a compressed state and constrained by a release mechanism. During the intervention, a guidewire inserted into the core assembly guides the outer sheath and core assembly to move as a whole, and this movement can be controlled by operating the handle assembly. After reaching the lesion site, the outer sheath is retracted by operating the handle assembly to expose the stent constrained on the core assembly. Then, the release mechanism is operated on the handle assembly to release the stent, which expands and supports itself against the blood vessel wall.

[0051] In this embodiment, the outer sheath connector 14 and the retainer 19 are installed inside the handle body 1. The distal end of the outer sheath connector 14 is used to connect and fix the outer sheath, and the retainer 19 can be connected to the proximal end of the outer sheath connector 14. A channel for the sheath core assembly to pass through is formed within the outer sheath connector 14 and the retainer 19. The process of retracting the outer sheath is essentially a process of the outer sheath connector 14 and the retainer 19 moving linearly backward along the axial direction within the handle body 1. Therefore, a channel that allows the linear movement of the outer sheath connector 14 and the retainer 19 needs to be formed within the handle body 1. The connection relationship between the retainer 19 and the outer sheath connector 14 satisfies the following: the retainer 19 can rotate relative to the outer sheath connector 14, while the retainer 19 and the outer sheath connector 14 are not separated. For example, the retainer 19 and the outer sheath connector 14 can be connected by a bearing or by a corresponding slide rail, etc., which is not limited in this embodiment.

[0052] To restrict the retraction of the outer sheath connector 14 during delivery and to release this restriction upon reaching the lesion location, an unlocking button 22 is provided on the fixator 19 in this embodiment. The unlocking button 22 protrudes from the outer wall of the fixator 19, allowing the operator to rotate the fixator 19 by pressing the unlocking button 22, thereby changing the position of the unlocking button 22. Simultaneously, a blocking groove 102 and a retraction groove 103 are provided on the handle body 1. The blocking groove 102 is circumferentially located on the handle body 1, while the retraction groove 103 is axially located on the handle body 1, i.e., along the retraction direction of the outer sheath. The blocking groove 102 and the retraction groove 103 communicate. When the unlocking button 22 is located within the blocking groove 102, the wall of the blocking groove 102 can limit the unlocking button 22, thereby restricting its linear axial movement and consequently limiting the axial movement of the fixator 19 and the outer sheath connector 14. After reaching the lesion location, the unlock button 22 can be pressed to rotate the fixator 19 relative to the outer sheath connector 14, causing the unlock button 22 to disengage from the blocking groove 102 and move into the retraction groove 103. At this time, the unlock button 22 can move axially to the distal end in the retraction groove 103, thereby allowing the fixator 19 and the outer sheath connector 14 to retract relative to the handle body 1, realizing the retraction operation of the outer sheath.

[0053] This invention achieves the technical effect of restricting the axial position of the outer sheath connector 14, preventing improper movement of the outer sheath connector 14 during transport by the delivery device or placement of the stent, which would cause the outer sheath to be pulled back, and releasing the restriction on the outer sheath connector 14 after reaching the lesion, allowing the outer sheath connector 14 to retract freely. This solves the problem in related technologies where the outer sheath connector 14 is easily retracted due to misoperation during transport by the delivery device or placement of the stent.

[0054] In one embodiment of the handle body 1, the handle body 1 includes a first housing 100 and a second housing 101. The first housing 100 and the second housing 101 are arranged opposite to each other and fastened together. The blocking groove 102 and the retraction groove 103 are both provided on the first housing 100.

[0055] In this embodiment, the handle body 1 mainly includes a first housing 100 and a second housing 101. After the first housing 100 and the second housing 101 are fastened together, a channel for the movement of the outer sheath connector 14 and the retainer 19 can be formed between the first housing 100 and the second housing 101. At the same time, a blocking groove 102 and a retraction groove 103 can be selectively provided on the wall of the first housing 100. The specific structure of the first housing 100 and the second housing 101 is not limited in this embodiment and can be designed according to actual needs.

[0056] In one embodiment of the unlock button 22, the unlock button 22 includes a pressing part 220 and a connecting part 221. The connecting part 221 is fixedly connected to the outer wall of the retainer 19. The pressing part 220 protrudes from the handle body 1. The connecting part 221 is slidably connected to the blocking groove 102 and the retraction groove 103.

[0057] To facilitate direct retraction of the outer sheath, in this embodiment, the pressing part 220 of the unlock button 22 protrudes from the handle body 1, allowing operation of the pressing part 220 from the outside of the handle body 1 to perform the retraction operation of the outer sheath. Furthermore, the blocking groove 102 and the retraction groove 103 on the handle body 1 are slidably connected to the connecting part 221 in the unlock button 22. To reduce the impact of the retraction groove 103 on the structural strength of the handle body 1, the width of the retraction groove 103 can be appropriately reduced, and the corresponding connecting part 221 in the unlock button 22 can be set to a corresponding width. That is, the connecting part 221 can be set to a flat structure, while the pressing part 220 protrudes from the handle body 1, thus allowing for any easily operable structure.

[0058] To further improve the smoothness of the retreat movement, such as Figure 3 As shown, guide grooves 2210 are provided on both sides of the connecting part 221, and the side walls 1031 of the retraction groove 103 extend into the guide grooves 2210 and are slidably connected to the guide grooves 2210.

[0059] To further reduce the frictional resistance between the guide groove 2210 and the side wall 1031 of the retraction groove 103 during the retraction sliding process, such as Figure 3 As shown, in this embodiment, a first guide slope 1030 is provided on the outer side of the sidewall 1031, and a second guide slope 2211 that fits into the first guide slope 1030 is provided in the guide groove 2210. The first guide slope 1030 and the second guide slope 2211 cooperate to guide the movement of the connecting part 221.

[0060] Specifically, in one embodiment, the two sidewalls 1031 of the retraction groove 103 are tapered structures, with a first guide slope 1030 formed on the outer side, and a second guide slope 2211 provided within the guide groove 2210 of the connecting portion 221. After installation, the second guide slope 2211 fits against the first guide slope 1030, thereby reducing the contact area between the guide groove 2210 and the two sidewalls 1031 of the retraction groove 103 while achieving guidance, reducing frictional resistance, and improving the smoothness of the retraction movement. Based on this, the length of the first guide slope 1030 or the second guide slope 2211 can be reduced according to actual conditions, thereby further reducing frictional resistance. However, the contact between the first guide slope 1030 and the second guide slope 2211 should be maintained to improve the precise guidance of the movement.

[0061] To further improve the smoothness and stability of the unlock button 22, a support protrusion 2212 is also provided on the connecting part 221 in this embodiment. The support protrusion 2212 is opposite to the second guide slope 2211 and abuts against the inner side surface of the side wall 1031. The surface of the support protrusion 2212 that abuts against the side wall 1031 is set as a protruding arc-shaped surface, and the surface of the side wall 1031 that abuts against the support protrusion 2212 is set as a plane.

[0062] Specifically, in this embodiment, the support protrusion 2212 is located inside the handle body 1, the guide groove 2210 is located between the support protrusion 2212 and the second guide slope 2211, and the two side walls 1031 of the retraction groove 103 extend into the guide groove 2210. The outer side surface of the side wall 1031 (i.e. the first guide slope 1030) is opposite to the second guide slope 2211, and the inner side surface of the side wall 1031 is opposite to the support protrusion 2212. By abutting the support protrusion 2212 against the inner side surface of the side wall 1031, and cooperating with the first guide slope 1030 and the second guide slope 2211, the unlock button 22 is supported, thereby improving the movement stability of the unlock button 22.

[0063] Based on this, in order to further reduce the frictional force of motion, the surface of the support protrusion 2212 that abuts against the side wall 1031 is set as a convex arc surface, and the surface of the side wall 1031 that abuts against the support protrusion 2212 is set as a plane, so that the support protrusion 2212 and the inner surface of the side wall 1031 are in line contact, reducing the contact area.

[0064] In the above embodiment, the retraction movement of the outer sheath connector 14 is restricted or permitted by rotating the retainer 19. To avoid accidental rotation of the retainer 19, such as... Figure 6 and Figure 7 As shown, this embodiment also includes a locking structure 21, which is disposed between the outer sheath tube connector 14 and the retainer 19. The locking structure 21 is used to lock the rotation angle of the retainer 19.

[0065] Specifically, the locking structure 21 can lock the retainer 19 at a set rotation angle, for example, locking the retainer 19 in its initial position. At this time, the unlocking button on the retainer 19 is located in the blocking groove of the handle body, which can restrict the retraction movement of the outer sheath connector 14. When it is necessary to allow the outer sheath connector 14 to retract, the retainer 19 needs to be unlocked so that the retainer 19 can rotate. For ease of operation, it is preferable that the locking structure 21 provides a certain resistance to the rotation of the retainer 19, and the operator needs to overcome this resistance to operate the retainer 19 to rotate.

[0066] In one embodiment, the locking structure 21 includes a spring top ball 210 and a positioning groove 211. The spring top ball 210 is located on the rear end face of the outer sheath tube connector 14, and the positioning groove 211 is located on the front end face of the retainer 19.

[0067] When the unlock button 22 is located in the blocking groove 102, the spring ball 210 is engaged in the positioning groove 211, thereby restricting the rotation of the retainer 19. When unlocking is required, the retainer 19 can be rotated, and under the action of external force, the spring ball 210 compresses the spring and disengages from the positioning groove 211, at which point the retainer 19 can rotate freely.

[0068] It is understandable that the spring top ball 210 can also be located on the front end face of the retainer 19, and the positioning groove 211 can be located on the rear end face of the outer sheath tube connector 14.

[0069] Of course, the appropriate locking structure 21 can also be selected according to actual needs. The specific description of the locking structure 21 in this embodiment is not restrictive.

[0070] Since the unlock button can rotate from the blocking groove into the retraction groove and also from the retraction groove into the blocking groove, the unlock button needs to be at two rotation angles. Therefore, in this embodiment, at least two positioning grooves 211 are provided and distributed circumferentially along the retainer 19. One positioning groove 211 is used to cooperate with the spring ball 210 to position the unlock button in the blocking groove, and the other positioning groove 211 is used to cooperate with the spring ball 210 to position the unlock button in the retraction groove.

[0071] In one embodiment of the outer sheath connector 14, such as Figure 2 As shown, the outer sheath connector 14 includes a sheath joint 141 and a connecting rod 140. The connecting rod 140 is used to insert and fix the outer sheath. The retainer 19 is connected to the sheath joint 141 and can rotate relative to the sheath joint 141.

[0072] Specifically, both the sheath connector 141 and the connecting rod 140 are hollow structures. The channel within the connecting rod 140 allows the outer sheath to be inserted and fixed, while also allowing the sheath core assembly inside the outer sheath to pass through. The corresponding channel within the sheath connector 141 has the same function. The connecting rod 140 can be a slender rod-like structure used to construct the corresponding channel. The sheath connector 141 can be a short, thick cylindrical structure used to connect the retainer 19.

[0073] In one implementation, such as Figure 4 and Figure 5As shown, to achieve the connection between the retainer 19 and the sheath connector 141, a connecting hook 1410 is provided on the rear end face of the sheath connector 141, and a connecting groove 195 is provided on the inner wall of the retainer 19. The connecting hook 1410 is hooked into the connecting groove 195 and can rotate within the connecting groove 195. In this embodiment, through the cooperation of the connecting groove 195 and the connecting hook 1410, the retainer 19 can both rotate relative to the sheath connector 141 and maintain its connection with the sheath connector 141.

[0074] Specifically, the inner wall of the retainer 19 is provided with an arc-shaped flange 191, and the flange 191 is provided with a notch 192, through which the hook can pass;

[0075] The retainer 19 is provided with an arc-shaped clip 193. A sealing head 194 is provided on the end of the arc-shaped clip 193 facing the sheath connector 141. The sealing head 194 is inserted and engaged with the notch 192 to seal the notch 192. The arc-shaped clip 193 is fixed to the inner wall of the retainer 19, and there is a gap between the front end of the arc-shaped clip 193 and the rear end of the flange 191 to form a connecting groove 195.

[0076] In this embodiment, an arc-shaped flange 191 is provided on the inner wall of the retainer 19. The number of notches 192 on the flange 191 corresponds to the number of connecting hooks 1410 on the sheath connector 141. The connecting hooks 1410 can pass through the notches 192 and be hooked onto the flange 191. Taking two symmetrical connecting hooks 1410 as an example, the flange 191 on the retainer 19 has two symmetrical notches 192, which divide the flange 191 into two segments. To limit the connecting hook 1410 to the flange 191, an arc-shaped retainer 193 is also provided inside the retainer 19. The arc-shaped retainer 193 can be installed on the inner wall of the retainer 19. The arc-shaped retainer 193 corresponds to the flange 191 in the axial direction, and the end face of the arc-shaped retainer 193 can fit against the end face of the connecting hook 1410. The arc-shaped retainer 193 and the flange 191 form a connecting groove 195, which limits the connecting hook 1410 within the connecting groove 195. To prevent the connecting hook 1410 from detaching through the notch 192, a sealing head 194 is provided on the arc-shaped retainer 193. After installation, the sealing head 194 is inserted into the notch 192. With this configuration, the retainer 19 can be rotated, and the connecting groove 195 rotates relative to the connecting hook 1410, while the connecting hook 1410 remains within the connecting groove 195.

[0077] To facilitate the positioning of the curved clip 193 and form a connecting groove 195 of suitable size, such as Figure 4As shown, in this embodiment, a limiting protrusion 196 is provided on the flange 191 near the notch 192. During assembly, the limiting protrusion 196 abuts against the end face of the arc-shaped clip 193, thereby positioning the arc-shaped clip 193 to facilitate its installation. Simultaneously, after the limiting protrusion 196 is provided, when the connecting hook 1410 is hooked onto the flange 191 through the notch 192, the connecting hook 1410 can be rotated to abut against the limiting protrusion 196, preventing the connecting hook 1410 from detaching and further facilitating assembly. The arc-shaped clip 193 can be bonded and fixed to the inner wall of the retainer 19.

[0078] According to another aspect of this application, a medical device delivery device is provided, comprising: a sheath assembly, a handle body, and the aforementioned handle assembly;

[0079] The sheath assembly includes an outer sheath and a sheath core assembly. The outer sheath is movably inserted into the handle body and fixedly connected to the outer sheath connector. The sheath core assembly is movably inserted into the outer sheath.

[0080] The above description is merely a preferred embodiment of this utility model and is not intended to limit the scope of this utility model. Various modifications and variations can be made to this utility model by those skilled in the art. Any modifications, equivalent substitutions, or improvements made within the spirit and principles of this utility model should be included within the protection scope of this utility model.

Claims

1. A handle assembly for delivering medical devices, characterized in that, include: The handle body, the outer sheath connector, and the retainer; among which, The outer sheath connector and the retainer are located inside the handle body and can move linearly along the axial direction relative to the handle body; The retainer is connected to the outer sheath connector and can rotate about the axis of the outer sheath connector; The fixture is equipped with an unlock button, which can be turned to rotate the fixture. The handle body is provided with a connecting blocking groove and a retraction groove. The retraction groove is arranged along the axial direction of the handle body, and the blocking groove is arranged along the circumferential direction of the handle body. The unlock button can rotate from the blocking groove into the retraction groove and slide within the retraction groove.

2. The handle assembly according to claim 1, characterized in that, The handle body includes a first housing and a second housing, which are disposed opposite to each other and fastened together. The blocking groove and the retraction groove are both provided on the first housing.

3. The handle assembly according to claim 1, characterized in that, The unlock button includes a pressing part and a connecting part. The connecting part is fixedly connected to the outer wall of the retainer. The pressing part protrudes from the handle body. The connecting part is slidably connected to the blocking groove and the retraction groove.

4. The handle assembly according to claim 3, characterized in that, The connecting part is provided with guide grooves on both sides, and the side walls of the retraction groove extend into the guide groove and are slidably connected to the guide groove.

5. The handle assembly according to claim 4, characterized in that, A first guide slope is provided on the outer side of the sidewall, and a second guide slope that fits into the guide groove is provided in the guide groove. The first guide slope and the second guide slope cooperate to guide the movement of the connecting part.

6. The handle assembly according to claim 5, characterized in that, The connecting part is also provided with a support protrusion, which is opposite to the second guide inclined surface and abuts against the inner surface of the side wall. The surface of the support protrusion that abuts against the side wall is a convex arc-shaped surface, and the surface of the side wall that abuts against the support protrusion is a plane.

7. The handle assembly according to claim 1, characterized in that, It also includes a locking structure, which is disposed between the outer sheath connector and the retainer, and the locking structure is used to lock the rotation angle of the retainer.

8. The handle assembly according to claim 7, characterized in that, The locking structure includes a spring-loaded ball and a positioning groove. The spring-loaded ball is located on the rear end face of the outer sheath connector, and the positioning groove is located on the front end face of the retainer; or, The spring top ball is located on the front end face of the fixture, and the positioning groove is located on the rear end face of the outer sheath tube connector; The positioning slots are provided in at least two and distributed along the circumference of the retainer. One of the positioning slots is used to cooperate with the spring top ball to restrict the unlocking button in the blocking slot, and the other positioning slot is used to cooperate with the spring top ball to restrict the unlocking button in the retraction slot.

9. The handle assembly according to claim 1, characterized in that, The outer sheath connector includes a sheath joint and a connecting rod. The connecting rod is used to insert and fix the outer sheath. The fixer is connected to the sheath joint and can rotate relative to the sheath joint. The rear end face of the sheath connector is provided with a connecting hook, and the inner wall of the fixer is provided with a connecting groove. The connecting hook is hooked into the connecting groove and can rotate within the connecting groove.

10. The handle assembly according to claim 9, characterized in that, The inner wall of the fastener is provided with an arc-shaped flange, and the flange is provided with a notch, through which the hook can pass; The retainer is provided with an arc-shaped clip, and a sealing head is provided on one end of the arc-shaped clip facing the sheath connector. The sealing head is inserted and engaged with the notch to seal the notch. The arc-shaped clip is fixed to the inner wall of the retainer, and there is a gap between the front end of the arc-shaped clip and the rear end of the flange to form the connecting groove.

11. The handle assembly according to claim 10, characterized in that, A limiting protrusion is provided at one end of the flange near the notch, and the limiting protrusion can abut against the end face of the arc-shaped clip during assembly.

12. A delivery device for transporting medical devices, characterized in that, include: The sheath assembly, the handle body, and the handle assembly as described in any one of claims 1 to 11; The sheath assembly includes an outer sheath and a sheath core assembly. The outer sheath is movably inserted into the handle body and fixedly connected to the outer sheath connector. The sheath core assembly is movably inserted into the outer sheath.

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