CN217066493U - Release mechanism and plug device - Google Patents

Abstract

The utility model provides a release mechanism and embolism device, release mechanism is used for realizing the release of implant, include: the release piece, the first control piece and the second control piece; the proximal end of the release member is adapted to be coupled to the implant; the first control piece and the second control piece are both communicated with the release piece, and the proximal end of the first control piece is connected with the proximal end of the second control piece in an interlocking way, wherein the proximal end of the first control piece and the proximal end of the second control piece can be unlocked at the proximal side of the release piece; wherein the first control element and the second control element are connected with the release element when the first control element and the second control element are interlocked; when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the release piece are disconnected. So configured, repositioning and withdrawal of the implant may be accomplished. And the mechanical structure of the releasing mechanism is relatively simple, and the processing technology is easier to realize.

Description

Release mechanism and plug device

Technical Field

The utility model relates to the technical field of medical equipment, in particular to release mechanism and embolism device.

Background

Embolization devices are common endovascular embolization and occlusion devices that are widely used in the treatment of intracranial aneurysms, embolization of the aorta and surrounding blood vessels, and filling after graft endoleaks. The embolization device may, for example, comprise a coil that is predisposed in the catheter in an approximately straightened state, and that is released after it has been pushed out of the catheter. In the clinic, the physician often needs to reposition or adjust the release profile of the coil, requiring the embolic device to function in a controlled release.

The spring ring is divided into a controllable ring and a pushing ring according to a release mechanism. The controllable loop, i.e., the spring coil, can be repositioned or retracted while in or outside the catheter by a release mechanism. However, the existing release mechanism of the controllable ring has a complex structure, extremely high requirements on a processing technology, great challenges for production and processing, poor reliability and poor feasibility of implementation. In addition, the relieved portion of the relief structure on the coil is not sufficiently smooth, presenting a potential risk of injury to the tumor mass and blood vessels. The pushing ring, namely the spring ring, can be pushed by the pushing guide wire in a one-way mode until the spring ring is pushed out of the catheter, the mechanical mechanism is relatively simple, and the processing cost is low. However, it can only achieve retraction in the catheter, and after the catheter is pushed out, the controlled function is disabled, and the functions of repositioning and retraction cannot be achieved.

Accordingly, there is a need to develop a release mechanism and an embolization device that address at least the above-mentioned problems.

SUMMERY OF THE UTILITY MODEL

An object of the utility model is to provide a release mechanism and embolism device to solve present release mechanism and can not realize the problem of relocating and withdrawing.

In order to solve the above technical problem, the utility model provides a release mechanism for realize the release of implant, a serial communication port, include: the release piece, the first control piece and the second control piece; the proximal end of the release member is adapted to be coupled to the implant; the first control piece and the second control piece are both communicated with the release piece, and the proximal end of the first control piece is connected with the proximal end of the second control piece in an interlocking way, wherein the proximal end of the first control piece and the proximal end of the second control piece can be unlocked at the proximal side of the release piece; wherein the first control element and the second control element are connected with the release element when the first control element and the second control element are interlocked; when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the release piece are disconnected.

Optionally, the second control element comprises a control guide wire and a connecting ring, and the connecting ring is connected with the proximal end of the control guide wire; when the connecting ring is sleeved on the first control piece, the first control piece and the second control piece are interlocked; when the first control piece is pulled away from the connecting ring, the first control piece and the second control piece are unlocked.

Optionally, the second control element further comprises a transition section, and the control guide wire and the connecting ring are connected through the transition section; the transition section is in an equal-diameter or variable-diameter arrangement.

Optionally, the proximal end of the first control element is further configured to extend into the internal cavity of the implant, and the connection ring sleeved on the first control element is located between the release element and the implant.

Optionally, the length of the first control element passing through the connecting ring is greater than the distance of the first control element and the second control element moving the implant towards the distal end.

Optionally, the proximal end of the first control member has a bent portion connected to the connection ring.

Optionally, the release member comprises a connecting portion and an end portion, a distal end of the connecting portion being connected to the end portion, and a proximal end of the connecting portion being adapted to be connected to the implant; the end portion is provided with a first channel and a second channel, the first channel and the second channel are respectively used for the first control piece and the second control piece to be arranged in a penetrating mode, and the sizes of the cross sections of the first channel and the second channel are respectively larger than the sizes of the cross sections of the first control piece and the second control piece.

Optionally, the end portion has a radial dimension greater than a radial dimension of the internal cavity of the implant.

Optionally, the releasing mechanism further includes a pushing rod, the pushing rod has a first cavity and a second cavity, and the first control element and the second control element are respectively inserted into the first cavity and the second cavity; the far end of the first control piece and the far end of the second control piece are connected with the far end of the pushing rod and can move relative to the axial direction of the pushing rod.

In order to solve the above technical problem, the utility model also provides a plug device, include: the implant comprises an implant, a catheter and the release mechanism, wherein the implant is connected with a release piece of the release mechanism, the catheter is provided with a cavity, the release mechanism and the implant are arranged in the cavity, and the release mechanism and the implant are movable relative to the catheter.

In a pair of the present invention, the releasing mechanism is used for releasing the implant, and includes: the release piece, the first control piece and the second control piece; the proximal end of the release member is adapted to be coupled to the implant; the first control piece and the second control piece penetrate through the release piece, the near end of the first control piece and the near end of the second control piece are connected in an interlocking mode, the near end of the first control piece and the near end of the second control piece can be unlocked at the near end side of the release piece, connection and release among the first control piece, the second control piece and the third control piece can be achieved, the mechanical structure is simple, the machining process is easy to achieve, the reliability is good, and the practicability is strong. Wherein, when the first control element and the second control element are interlocked, the first control element and the second control element are connected with the release element, so that the first control element and the second control element can move together with the implant, thereby enabling the first control element and the second control element to perform the operations of withdrawing and repositioning on the implant; when the first control part and the second control part are unlocked, the first control part, the second control part and the release part are disconnected, the implant connected with the release part is released, and the implant can be placed into a lesion of a patient.

Drawings

Those skilled in the art will appreciate that the drawings are provided for a better understanding of the invention and do not constitute any limitation on the scope of the invention. Wherein:

fig. 1 is a schematic view of a release mechanism in a catheter according to an embodiment of the present invention.

Fig. 2 is a schematic view of a second control element according to an embodiment of the present invention.

Fig. 3 is a schematic view of a release member according to an embodiment of the present invention.

Fig. 4 is a schematic view of a push rod according to an embodiment of the present invention.

Fig. 5 is a schematic view of a release mechanism outside a catheter according to an embodiment of the present invention.

Fig. 6 is a schematic view of the disengagement mechanism according to the embodiment of the present invention after being unlocked.

Fig. 7 is a schematic view of the control assembly according to an embodiment of the present invention disconnected from the implant.

Fig. 8 is a schematic view of another disengagement mechanism according to an embodiment of the present invention.

In the drawings:

1-an implant;

10-release, 11-connection, 12-end, 121-first channel, 122-second channel;

20-control assembly, 21-first control, 211-bend, 22-second control, 221-control guide wire, 222-connection ring, 223-transition;

30-push rod, 31-first cavity, 32-second cavity;

40-conduit.

Detailed Description

To make the objects, advantages and features of the present invention clearer, the present invention will be described in further detail with reference to the accompanying drawings and specific embodiments. It is to be noted that the drawings are in simplified form and are not to scale, but rather are provided for the purpose of facilitating and distinctly claiming the embodiments of the present invention. Further, the structures illustrated in the drawings are often part of actual structures. In particular, the drawings may have different emphasis points and may sometimes be scaled differently.

As used in this specification, the singular forms "a," "an," and "the" include plural referents unless the content clearly dictates otherwise. As used in this specification, the term "or" is generally employed in its sense including "and/or" unless the content clearly dictates otherwise. The terms "a number of" are generally used in a sense including "at least one," the terms "at least two" are generally used in a sense including "two or more," furthermore, the terms "first," "second," and "third" are used for descriptive purposes only and are not to be construed as indicating or implying relative importance or implicitly indicating the number of technical features indicated. Thus, features defined as "first", "second" and "third" may explicitly or implicitly include one or at least two of the features, and the terms "mounted", "connected" and "connected" are to be construed broadly and may for example be fixedly connected, detachably connected, or integral; either directly or indirectly through intervening media, either internally or in any other relationship. The term "proximal" refers to the end of the patient that is near the lesion, and the term "distal" refers to the end that is near the operator's operation. Furthermore, as used in the present application, the disposition of an element with another element generally only means that there is a connection, coupling, fit or transmission relationship between the two elements, and the connection, coupling, fit or transmission between the two elements may be direct or indirect through an intermediate element, and cannot be understood as indicating or implying a spatial positional relationship between the two elements, i.e., an element may be in any orientation of the inside, outside, above, below or one side of another element, unless the content clearly indicates otherwise. The specific meaning of the above terms in the present invention can be understood according to specific situations by those skilled in the art. Furthermore, in the following description, numerous specific details are set forth in order to provide a more thorough understanding of the present invention. It will be apparent, however, to one skilled in the art, that the present invention may be practiced without one or more of these specific details. In other instances, well-known features have not been described in order to avoid obscuring the present invention.

In an embodiment of the present invention, a release mechanism and a plug device are provided, the release mechanism is used for releasing an implant, including: the release piece, the first control piece and the second control piece; the proximal end of the release member is adapted to be coupled to the implant; the first control piece and the second control piece are both communicated with the release piece, and the proximal end of the first control piece is connected with the proximal end of the second control piece in an interlocking way, wherein the proximal end of the first control piece and the proximal end of the second control piece can be unlocked at the proximal side of the release piece; wherein the first control element and the second control element are connected with the release element when the first control element and the second control element are interlocked; when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the release piece are disconnected. The arrangement is such that the first and second control elements can reposition and retract an implant connected to the release member. In addition, the mechanical structure of the releasing mechanism is relatively simple, the processing technology is easier to realize, the reliability is good, and the practicability is strong.

The following description refers to the accompanying drawings.

Referring to fig. 1 to 7, fig. 1 is a schematic view of a releasing mechanism in a conduit according to an embodiment of the present invention; fig. 2 is a schematic view of a second control element according to an embodiment of the present invention; fig. 3 is a schematic view of a release member and a connecting guide wire according to an embodiment of the present invention; fig. 4 is a schematic view of a push rod according to an embodiment of the present invention; fig. 5 is a schematic view of the release mechanism of the embodiment of the present invention outside a catheter; fig. 6 is a schematic view of the disengagement mechanism according to the embodiment of the present invention after being unlocked; fig. 7 is a schematic view of the control assembly being disconnected from the implant in accordance with an embodiment of the present invention; fig. 8 is a schematic view of another disengagement mechanism according to an embodiment of the present invention.

Referring to fig. 1, the present embodiment provides a release mechanism for effecting release of an implant such that the release mechanism can control the retraction of the implant. The disengagement mechanism includes: the release device comprises a release member 10 and a control assembly 20, wherein the control assembly 20 comprises a first control member 21 and a second control member 22.

Referring to fig. 1, the proximal end of the release member 10 is adapted to be connected to the implant 1. The implant 1 is for example a plug component. Further, the implant 1 is a coil. In the present embodiment, the implant 1 is used as a coil for illustration. It should be understood that, in the present embodiment, the "proximal end" refers to the end close to the lesion of the patient, and the "distal end" refers to the end close to the operation of the operator.

With continued reference to fig. 1, the control assembly 20 includes a first control member 21 and a second control member 22, the first control member 21 and the second control member 22 both pass through the release member 10, and a proximal end of the first control member 21 and a proximal end of the second control member 22 are connected in an interlocking manner at a proximal side of the release member 10. It should be noted that, the interlocking connection of the proximal end of the first control element 21 and the proximal end of the second control element 22 on the proximal side of the release element 10 means that the two are relatively interlocked and connected on the proximal side of the release element 10, that is, when the proximal end of the first control element 21 and the proximal end of the second control element 22 are interlocked and connected, they can drive the release element 10 to move simultaneously, and when the proximal end of the first control element 21 and the proximal end of the second control element 22 are unlocked, both the first control element 21 and the second control element 22 can be pulled out from the release element 10.

Further, in the present embodiment, when the first control element 21 and the second control element 22 are interlocked, the first control element 21 and the second control element 22 are connected to the release element 10, so that the control assembly 20 can move together with the release element 10 and the implant 1, for example, the control assembly 20 moves the release element 10 and the implant 1 toward the proximal end or the distal end, so that the control assembly 20 can perform a retraction operation on the implant 1, thereby achieving a function of repositioning or retracting the release mechanism on the implant 1 inside or outside the catheter. Preferably, the control unit 20 causes the implant 1 to move distally when the release element 10 and hence the implant 1 need to move distally. When the first control member 21 and the second control member 22 are unlocked, the first control member 21, the second control member 22 and the release member 10 are disconnected, and the release member 10 is released, that is, the implant 1 connected to the release member 10 is released, so that the implant 1 can be placed in the lesion site of the patient. This arrangement enables the release mechanism to achieve full control of the implant 1 prior to the active release operation, allowing the control assembly 20 to reposition and retract the implant 1. In addition, the mechanical structure of the releasing mechanism is relatively simple, the processing technology is easier to realize, the reliability is good, and the practicability is strong.

In the present embodiment, the interlocking between the first control member 21 and the second control member 22 may be a mechanical structure connected to each other. For example, the first control element 21 is disposed on the second control element 22 in a penetrating manner, or the second control element 22 is sleeved on the first control element 21, and the first control element 21 is provided with a device for preventing the second control element 22 from slipping off, so as to realize interlocking. When unlocked, the first control member 21 releases the second control member 22 to disengage the two. For another example, the first control element 21 and the second control element 22 are mutually hooked to realize interlocking, the mutual hooking force is larger than the force for moving the implant 1 towards the distal end, and when the implant is unlocked, the hooked structures break away from each other, so that the implant is separated.

Preferably, with continued reference to fig. 1 and 2, the second control member 22 includes a control guide wire 221 and a connection ring 222, and the connection ring 222 is connected to a proximal end of the control guide wire 221. The connecting ring 222 is used for being sleeved on the first control member 21, that is, the proximal end of the first control member 21 passes through the connecting ring 222. The first control 21 is for example a guide wire. More preferably, the connection ring 222 is in clearance fit with the first control member 21. When the connecting ring 222 is sleeved on the first control member 21, the first control member 21 and the second control member 22 are interlocked with each other; when the first control member 21 is pulled away from the connection ring 222, the first control member 21 and the second control member 22 are unlocked. Preferably, the first control member 21 may be a rigid wire, and the material used for the first control member may also be stainless steel, nickel titanium, etc., and the cross section of the first control member may be circular or square, which is not limited herein. Further, the control wire 221 of the second control member 22 may be a rigid wire. The connection ring 222 of the second control member 22 may be a ring-shaped flexible polymer wire, which is straightened by a force to be pulled out of the release member 10.

Preferably, as shown in fig. 2, the second control member 22 further includes a transition section 223, and the control wire 221 and the connection ring 222 are connected through the transition section 223. Specifically, the connection ring 222 is a ring formed by folding a wire in half, i.e., the wire is fixed by the transition section 223 after being folded in half. The transition section 223 may also be of a constant or variable diameter arrangement, preferably a constant or variable diameter circular tube. When the radial dimension formed by the folded metal wire is larger than the radial dimension of the control guide wire 221, the transition section 223 is in a reducing arrangement, that is, the radial dimension of the folded metal wire is larger than the radial dimension of the control guide wire 221. The transition section 223 may be a metal or a polymer. If a polymer material is selected, the control guide wire 221 and the connection ring 222 may be connected by adhesion, and if a metal material is selected, the connection may be performed by adhesion or mechanical clamping. Such as by interference fit at the junction of the transition 223 and the connection ring 222.

Preferably, as shown in fig. 1, a proximal end of the first control element 21 is disposed to penetrate through the release element 10, and the proximal end of the first control element 21 is further configured to extend into an inner cavity of the implant 1, so that the connection ring 222 sleeved on the first control element 21 is located between the release element 10 and the implant 1, thereby preventing the release element 10 from falling off from the first control element 21.

Preferably, as shown in fig. 1, the length of the first control member 21 passing through the connection ring 222 is greater than the distance that the control assembly 20 moves the implant 1 distally. When it is desired to move the implant 1, the first control member 21 and the second control member 22 of the control assembly 20 pull the implant 1 distally together. Despite the synchronous movement, there is a possibility of relative slippage between the first control member 21 and the connection ring 222, and therefore, the length of the first control member 21 passing through the connection ring 222 is longer than the distance of the implant movement, thereby preventing the connection ring 222 from slipping off. It should be understood that the length of the first control member 21 passing through the connection ring 222 represents the length of the proximal end of the first control member 21 passing through the connection ring 222, and the length of the portion of the proximal end of the first control member 21 sleeved on the connection ring 222 is greater than the distance moved by the implant 1.

Preferably, as shown in fig. 8, the proximal end of the first control member 21 has a bent portion 211, and the bent portion 211 of the first control member 21 is connected to the connection ring 222, so as to prevent the connection ring 222 from falling off the first control member 21. That is, the bent portion 211 of the first control member 21 abuts against the connection ring 222 to hook the connection ring 222, so that the first control member 21 is connected to the second control member 22 without being separated. Further, the material used for the first control member 21 may be a flexible polymer material, so that when the first control member 21 is pulled, the bending portion of the first control member 21 is more easily separated from the connection ring 222.

Preferably, as shown in fig. 3, the releasing member 10 comprises a connecting portion 11 and an end portion 12, wherein the distal end of the connecting portion 11 is connected with the end portion 12, and the proximal end of the connecting portion 11 is used for connecting with the implant 1. The end portion 12 is used for connection of the control assembly 20. The end portion 12 is, for example, a plate, block or sphere, the outer surface of which is a smooth curved surface, thereby reducing potential damage to the tumor cavity and the vessel wall by the implant 1 after the detachment region and the release to the diseased site of the patient. Further, the end 12 is spherical. The spherical end may be a perforated metal sphere. Further, the end portion 12 includes a first channel 121 and a second channel 122, the first channel 121 and the second channel 122 are respectively provided for the first control member 21 and the second control member 22 to pass through, and the cross-sectional dimensions of the first channel 121 and the second channel 122 are respectively greater than the cross-sectional dimensions of the first control member 21 and the second control member 22, so as to allow the first control member 21 and the second control member 22 to be drawn away. The cross-sectional shapes of the first channel 121 and the second channel 122 are matched with the first control member 21 and the control guide wire 221. Preferably, the first control member 21 and the control wire 221 are circular wires, and the first channel 121 and the second channel 122 are circular through holes. Of course, the end portions may also be ellipsoidal or have other shapes with smooth surfaces.

More preferably, as shown in fig. 1, the end of the release element 10 has a radial dimension greater than the radial dimension of the internal cavity of the implant 1. For example, in this embodiment, the spring ring has an internal cavity configuration. The end of the release member 10 is preferably, for example, a bulbous end having a diameter greater than the inner diameter of the coil to prevent the release member 10 from passing into the interior cavity of the implant 1.

Preferably, as shown in fig. 4, the releasing mechanism further includes a pushing rod 30, the pushing rod 30 has a first cavity 31 and a second cavity 32, the first control member 21 is disposed in the first cavity 31, and the second control member 22 is disposed in the second cavity 32. The proximal end of the first control element 21 extends out of the first cavity 31, and the proximal end of the second control element 22 extends out of the second cavity 32. The first control member 21 and the push rod 30, and the second control member 22 and the push rod 30 move together or relatively. In practice, the distal end of the control member 20 is connected to the distal end of the push rod 30, and the proximal end of the control member 20 is connected to the implant 1. Preferably, the distal ends of the first control element 21 and the second control element 22 are connected with the distal end of the push rod 30 and can move axially relative to the push rod 30. For example, the distal end of the push rod 30 is connected with the distal end of the first control element 21 and the distal end of the second control element 22 through threads or a snap connection. When pushing the implant 1 into the affected area or moving the implant 1, the pushing rod 30 and the control member 20 are connected to each other, the pushing rod 30 and the control member 20 move together, and the pushing rod 30 is stationary when moving. When the implant 1 is released, the distal end of the control assembly 20 and the pushing rod 30 are detached from each other, the first control member 21 or the second control member 22 and the pushing rod 30 can be moved relatively, and the operator can move the first control member 21 or the second control member 22, the pushing rod 30 is kept still, and the control assembly 20 is detached from the implant 1. Preferably, the pushing rod 200 is a flexible polymer rod. The first cavity 31 is preferably circular in cross section, providing a passage for the first control member 21; the second cavity 32 is preferably circular in cross-section to provide access to the second control member 22.

The present embodiments also provide an embolization device comprising: implant 1, catheter 40 and a release mechanism as described above, said implant 1 being connected to a release member 10 of said release mechanism. The catheter 40 has a cavity in which the release mechanism and the implant 1 are located, the control assembly 20 of the release mechanism and the implant 1 being movable relative to the catheter 40. The implant 1 can also be controlled by the control assembly 20 to reposition and retract without the control assembly 20 unlocking after the implant 1 is pushed out of the catheter 40. The embolic device has the beneficial effects of the release mechanism and will not be described herein. Other components and principles of the embolic device can be referred to in the art and will not be described in detail herein. The use of the release mechanism is described in detail below with reference to fig. 1, 5 to 7.

First, as shown in fig. 1 and 5, the operator places the release mechanism into the lesion site of the patient, pushes the push rod 30, and pushes the implant 1 out of the catheter 40.

Secondly, if the position of the implanted implant 1 is accurate. The operator detaches the distal end of the control assembly 20 from the distal end of the catheter 40. The unlocking control assembly 20, as shown in fig. 6, pulls out the first control member 21 and separates from the first channel 121, the first control member 21 moves relative to the push rod 30, and the first control member 21 separates from the connection ring 222. Subsequently, as shown in fig. 7, the second control member 22 is pulled away from the second passage 122, enabling the release of the implant 1. If the position of the implanted implant 1 deviates. The operator pulls the push rod 30 and the control assembly 20 distally, and the implant 1 moves along with the control assembly 20, so that the implant 1 is repositioned until the correct position is reached. Thereafter, the control assembly 20 is unlocked.

Finally, the push rod 30 and the catheter 40 are withdrawn from the lesion site.

In summary, the present invention provides a releasing mechanism and an embolic device, wherein the releasing mechanism is used for releasing an implant, and comprises: the release piece, the first control piece and the second control piece; the proximal end of the release member is adapted to be coupled to the implant; the first control piece and the second control piece are both communicated with the release piece, and the proximal end of the first control piece is connected with the proximal end of the second control piece in an interlocking way, wherein the proximal end of the first control piece and the proximal end of the second control piece can be unlocked at the proximal side of the release piece; wherein the first control element and the second control element are connected with the release element when the first control element and the second control element are interlocked; when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the release piece are disconnected. The arrangement is such that the first and second control elements can reposition and retract an implant connected to the release member. In addition, the mechanical structure of the releasing mechanism is relatively simple, the processing technology is easier to realize, the reliability is good, and the practicability is strong.

It should also be understood that while the present invention has been described in conjunction with the preferred embodiments thereof, the foregoing description is not intended to limit the invention. To anyone skilled in the art, without departing from the scope of the present invention, the technical solution disclosed above can be used to make many possible variations and modifications to the technical solution of the present invention, or to modify equivalent embodiments with equivalent variations. Therefore, any simple modification, equivalent change and modification made to the above embodiments by the technical entity of the present invention all still belong to the protection scope of the technical solution of the present invention, where the technical entity does not depart from the content of the technical solution of the present invention.

Claims (10)

1. A release mechanism for effecting release of an implant, comprising: the release piece, the first control piece and the second control piece;

the proximal end of the release member is adapted to be coupled to the implant;

the first control piece and the second control piece are both communicated with the release piece, and the proximal end of the first control piece is connected with the proximal end of the second control piece in an interlocking way, wherein the proximal end of the first control piece and the proximal end of the second control piece can be unlocked at the proximal side of the release piece;

wherein the first control element and the second control element are connected with the release element when the first control element and the second control element are interlocked; when the first control piece and the second control piece are unlocked, the first control piece, the second control piece and the release piece are disconnected.

2. The disengagement mechanism according to claim 1, wherein the second control comprises a control guidewire and a connection ring connected to a proximal end of the control guidewire;

when the connecting ring is sleeved on the first control piece, the first control piece and the second control piece are interlocked; when the first control piece is pulled away from the connecting ring, the first control piece and the second control piece are unlocked.

3. The disengagement mechanism according to claim 2, wherein the second control member further comprises a transition section through which the control guidewire and the connection ring are connected; the transition section is in an equal-diameter or variable-diameter arrangement.

4. The release mechanism of claim 2, wherein the proximal end of the first control member is further adapted to extend into an interior cavity of the implant, and the attachment ring is disposed over the first control member between the release member and the implant.

5. The release mechanism of claim 4, wherein a length of the first control member through the attachment ring is greater than a distance that the first and second control members move the implant distally.

6. The disengagement mechanism according to claim 2, wherein the proximal end of the first control member has a bend, which connects with the connection ring.

7. The release mechanism of any of claims 1-6, wherein the release member includes a connecting portion and an end portion, a distal end of the connecting portion being connected to the end portion and a proximal end of the connecting portion being adapted to be connected to the implant; the end portion is provided with a first channel and a second channel, the first channel and the second channel are respectively used for the first control piece and the second control piece to be arranged in a penetrating mode, and the sizes of the cross sections of the first channel and the second channel are respectively larger than the sizes of the cross sections of the first control piece and the second control piece.

8. The disengagement mechanism according to claim 7, wherein the end portion has a radial dimension that is larger than a radial dimension of the internal cavity of the implant.

9. The disengagement mechanism according to claim 1, further comprising a push rod having a first cavity and a second cavity, the first and second control members being disposed through the first and second cavities, respectively; the far end of the first control piece and the far end of the second control piece are connected with the far end of the pushing rod and can move relative to the axial direction of the pushing rod.

10. An embolic device, comprising: an implant, a catheter, and a release mechanism according to any of claims 1-9, the implant being connected to a release member of the release mechanism, the catheter having a cavity, the release mechanism and the implant being disposed within the cavity, the release mechanism and the implant being movable relative to the catheter.

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