Valve clamping device with adjustable closing angle

Abstract

The utility model provides a valve clamping device with an adjustable closing angle. The valve clamping device comprises a base and an adjusting seat, and the adjusting seat moves relative to the base so as to adjust the opening and closing angle of a clamping unit; the clamping unit is respectively connected with the base and the adjusting seat; the clamping unit comprises at least two upper clamping arms, and any upper clamping arm comprises at least two stacked clamping pieces; the locking unit can slide relative to the base and the adjusting seat; when the locking unit slides to a first position, the base and the adjusting seat are locked; and when the locking unit slides to the second position, the base and the adjusting seat are unlocked. When the closing angle of the instrument is large, enough clamping force can be provided for target tissue, the instrument is prevented from being separated from the target tissue, and meanwhile stable locking force can be provided.

Description

Technical Field

[0001] The present disclosure relates to the technical field of medical devices, and particularly to a valve clamping device with adjustable closing angle. Background Art

[0002] In related technologies, for problems such as mitral valve insufficiency and tricuspid valve insufficiency, clamping instruments are often used for treatment. After such instruments capture the valve leaflets and close and clamp the tissue, to prevent tissue loosening, it is necessary to close the clamping arms to the minimum angle adapted to the tissue thickness and lock them, so as to bring the tissue together and clamp it. However, when the distance between the patient's valve leaflets is large, forcibly dragging the valve leaflets to clamp them together will cause the valve leaflets to bear greater stress, increasing the risk of perforation and tearing of the valve leaflets. Based on the above analysis, there is an urgent need for a clamping device that provides a stable clamping force at a large closing angle, so as to perform valve repair more reliably and ultimately at least solve or partially solve one of the above technical problems. Summary of the Utility Model

[0003] In order to overcome at least one of the many problems in related technologies, the present disclosure provides a valve clamping device with adjustable closing angle.

[0004] Among them, the clamping device includes:

[0005] A base and an adjustment seat, the adjustment seat moves relative to the base to adjust the opening and closing angle of the clamping unit;

[0006] A clamping unit, which is respectively connected to the base and the adjustment seat;

[0007] The clamping unit includes at least two upper clamping arms, and any one of the upper clamping arms includes at least two stacked clamping sheets.

[0008] In some optional embodiments, it further includes a locking unit, which can slide relative to the base and the adjustment seat;

[0009] When the locking unit slides to the first position, the base and the adjustment seat are locked; when the locking unit slides to the second position, the base and the adjustment seat are unlocked.

[0010] In some optional embodiments, the adjustment seat includes a locking portion and an unlocking portion, and the locking unit can selectively cooperate with the locking portion and the unlocking portion to realize the switching of the locking unit between the first position and the second position.

[0011] In some optional embodiments, the locking unit includes an elastic pressing piece, and the elastic pressing piece can selectively cooperate with the locking portion and the unlocking portion.

[0012] In some alternative embodiments, a first connection portion is provided on the base;

[0013] A second connection portion is provided on the adjusting base;

[0014] In the clamped state, the first connection portion and the second connection portion are cooperatively connected, and in the unclamped state, the first connection portion and the second connection portion are disconnected;

[0015] When the locking unit slides to the first position, the cooperatively connected first connection portion and second connection portion are locked and the opening and closing angle is fixed; when the locking unit slides to the second position, the first connection portion and the second connection portion are unlocked.

[0016] In some alternative embodiments, the locking unit includes a pushing portion for locking or unlocking the first connection portion and the second connection portion; and when the elastic pressing piece cooperates with the unlocking portion, the locking unit is in the second position; when the elastic pressing piece cooperates with the locking portion, the locking unit is in the first position.

[0017] In some alternative embodiments, the pushing portion includes a groove, and the adjusting base can slide in the groove.

[0018] In some alternative embodiments, the adjusting base includes a central shaft portion, and the locking portion and the unlocking portion are provided on the central shaft portion.

[0019] In some alternative embodiments, the end of the central shaft portion close to the base is connected to the conveying system, and the conveying system adjusts the position of the central shaft portion to change the position of the adjusting base relative to the base and adjusts the cooperation state of the first connection portion and the second connection portion.

[0020] In some alternative embodiments, the first connection portion includes a plurality of first clamping portions extending along the axial direction of the base;

[0021] The second connection portion includes a plurality of second clamping portions extending along the axial direction of the adjusting base;

[0022] At least one of the first clamping portions is selectively clamped with at least one of the second clamping portions to enable multi-stage adjustment of the opening and closing angle.

[0023] In some alternative embodiments, the clamping unit includes at least two lower clamping arms, and each of the lower clamping arms is pivotally connected to the base and can form different opening and closing angles under the action of the movement of the adjusting base relative to the base.

[0024] In some alternative embodiments, each of the upper clamping arms is connected to the base and can be driven to approach or move away from the lower clamping arm.

[0025] In some alternative embodiments, the clamping unit further includes an elastic arm, one end of the elastic arm is pivotally connected to the lower clamping arm; the other end of the elastic arm is pivotally connected to the adjustment seat, or the other end of the elastic arm is fixedly connected to the adjustment seat.

[0026] The technical solution of the present disclosure has the following advantages or beneficial effects:

[0027] (1) Any one of the upper clamping arms in the present disclosure includes at least two stacked clamping sheets, which can provide sufficient clamping force for the target tissue and realize the closing of the clamping instrument at a large angle. And the first connecting portion and the second connecting portion are used to control the switching between the quick adjustment and the fine adjustment of the base and the adjustment seat. And when the opening and closing angle of the clamping unit is in the fine adjustment state, the locking unit can lock the first connecting portion and the second connecting portion at any time, so that the opening and closing angle is kept stable. And when it is necessary to re-adjust the opening and closing angle, only need to slide the locking unit to release the constraint relationship between the first connecting portion and the second connecting portion. The locking unit can provide a stable locking effect, avoiding the problem that the opening and closing angle of the clamping unit is unstable under the action of external force when the instrument is in the clamping state.

[0028] (2) The pushing portion in the present disclosure includes a groove, and the adjustment seat can slide in the groove; the setting of the groove structure enables the locking unit to only axially slide relative to the adjustment seat, avoiding circumferential rotation, so as to ensure that the elastic pressing piece can stably and reliably cooperate with the unlocking portion or the locking portion.

[0029] (3) The locking unit in the present disclosure includes an elastic pressing piece, and the locking unit can be sleeved on the adjustment seat and move along the axial direction of the adjustment seat. When it slides to the vicinity of the bottom end of the adjustment seat, the elastic pressing piece is buckled with the unlocking portion, and the adjustment seat is unlocked from the base. And when it slides away from the bottom end of the adjustment seat, the elastic pressing piece is buckled with the locking portion, then the adjustment seat is locked with the base. The elastic pressing piece only needs to cooperate with the locking portion and the unlocking portion at different positions respectively to realize the locking and unlocking control of the adjustment seat and the base, greatly reducing the structural manufacturing cost and improving the operation convenience and accuracy. Description of the Drawings

[0030] The drawings are used to better understand the present disclosure and do not constitute an improper limitation to the present disclosure. Among them:

[0031] Figure 1 is a schematic diagram of the first-direction longitudinal section in the clamped state of the clamping device according to an embodiment of the present disclosure;

[0032] Figure 2 is an axonometric view of the clamping device according to an embodiment of the present disclosure;

[0033] Figure 3 is a schematic diagram of a second-direction longitudinal section of a clamping device according to an embodiment of the present disclosure;

[0034] Figure 4 is an exploded schematic diagram of a clamping device according to an embodiment of the present disclosure;

[0035] Figure 5 is another axonometric view of a clamping device according to an embodiment of the present disclosure;

[0036] Figure 6 is a schematic diagram of a first-direction longitudinal section of a clamping device in an unclamped state according to an embodiment of the present disclosure;

[0037] Figure 7 is a three-dimensional schematic diagram of a base of a clamping device according to an embodiment of the present disclosure;

[0038] Figure 8 is a schematic diagram of a longitudinal section of a base of a clamping device according to an embodiment of the present disclosure;

[0039] Figure 9 is a partial structural schematic diagram of an adjustment seat of a clamping device according to an embodiment of the present disclosure;

[0040] Figure 10 is a three-dimensional schematic diagram of a combination body of an adjustment seat and a central shaft portion of a clamping device according to an embodiment of the present disclosure;

[0041] Figure 11 is a three-dimensional schematic diagram of a locking unit of a clamping device according to an embodiment of the present disclosure;

[0042] Figure 12 is a sectional schematic diagram of a locking unit of a clamping device according to an embodiment of the present disclosure;

[0043] Figure 13 is a schematic diagram of a first-direction longitudinal section of a clamping device in a first clamped and locked state according to an embodiment of the present disclosure;

[0044] Figure 14 is a schematic diagram of a first-direction longitudinal section of a clamping device in a second clamped and locked state according to an embodiment of the present disclosure;

[0045] Figure 15 is a schematic diagram of a clamping process of a clamping device according to an embodiment of the present disclosure;

[0046] Figure 16 is a schematic diagram of a clamped and locked state of a clamping device at a large closing angle according to an embodiment of the present disclosure;

[0047] Figure 17It is a partial structural schematic diagram of another adjustment base of the clamping device according to an embodiment of the present disclosure.

[0048] Description of reference numerals:

[0049] 101 - Thrust portion, 201 - Base, 202 - Adjustment base, 203 - Lower clamping arm, 204 - Elastic arm, 205 - Upper clamping arm, 206 - First interface portion, 207 - Third interface portion, 208 - First rotating shaft, 209 - Second rotating shaft, 301 - Locking unit, 302 - Central shaft portion, 601 - Fulcrum, 602 - First limiting portion, 611 - First connecting portion, 701 - Second connecting portion, 702 - Pushing surface, 703 - Connecting seat, 801 - Unlocking surface, 802 - Unlocking portion, 803 - Locking portion, 805 - Second interface portion, 3011 - Thrust surface, 3012 - Locking unit through hole, 3013 - Elastic pressing piece, 3014 - Fourth interface portion, 1201 - First clamping position, 1202 - Second clamping position, 1301 - Clamping portion, 1302 - Target tissue, 1401 - Elastic arm included angle. Detailed implementation manners

[0050] The following describes exemplary embodiments of the present disclosure with reference to the accompanying drawings. Various details of the embodiments of the present disclosure are included to facilitate understanding, and they should be considered merely exemplary. Therefore, those of ordinary skill in the art should recognize that various changes and modifications can be made to the embodiments described herein without departing from the scope and spirit of the present disclosure. Similarly, for clarity and conciseness, descriptions of well-known functions and structures are omitted below.

[0051] The terms used in this application are only for the purpose of describing specific embodiments and are not intended to limit this application. The singular forms "a", "the", and "said" used in this application and the appended claims are also intended to include the plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more of the associated listed items.

[0052] It should be understood that although the terms first, second, third, etc. may be used in this application to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of this application, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "when" or "while" or "in response to determining".

[0053] To solve the problems in the prior art that when the distance between leaflets is large, forcibly dragging and clamping the leaflets will cause the leaflets to bear large stress, increasing the risk of perforation and tearing of the leaflets. In some embodiments of the present utility model, a valve clamping device with adjustable closing angle is provided. Among them, the clamping device includes: a base and an adjusting seat, and the adjusting seat moves relative to the base to adjust the opening and closing angle of the clamping unit; a clamping unit, which is respectively connected to the base and the adjusting seat;

[0054] The clamping unit includes at least two upper clamping arms, and any one of the upper clamping arms includes at least two stacked clamping pieces.

[0055] Preferably, it further includes a locking unit, which can slide relative to the base and the adjusting seat; when the locking unit slides to the first position, the base and the adjusting seat are locked; when the locking unit slides to the second position, the base and the adjusting seat are unlocked.

[0056] In some alternative embodiments, the adjusting seat includes a locking part and an unlocking part, and the locking unit can selectively cooperate with the locking part and the unlocking part to realize the switching of the locking unit between the first position and the second position.

[0057] In some alternative embodiments, the locking unit includes an elastic pressing piece, and the elastic pressing piece can selectively cooperate with the locking part and the unlocking part.

[0058] In some alternative embodiments, a first connecting part is provided on the base; a second connecting part is provided on the adjusting seat; in the clamping state, the first connecting part and the second connecting part are cooperatively connected, and in the non-clamping state, the first connecting part and the second connecting part are disconnected; a locking unit, which can slide relative to the base and the adjusting seat; if the locking unit slides to the first position, the cooperatively connected first connecting part and second connecting part are locked and the opening and closing angle is fixed; if the locking unit slides to the second position, the first connecting part and the second connecting part are unlocked.

[0059] Such as Figures 1 to 9As shown in the embodiment shown, the main body of the clamping device in some embodiments of the utility model includes a base 201 and an adjustment seat 202, and corresponding parts arranged on the base 201 and the adjustment seat 202. In particular, the clamping unit arranged on the base 201 and the adjustment seat 202 is used to clamp the target tissue, and to close the opening and closing angle of the clamping unit under the control of the operator to achieve the final treatment purpose. In some embodiments, in order to facilitate the adjustment and control of the opening and closing angle of the clamping unit, the purpose is achieved by controlling the movement of the adjustment seat 202 relative to the base 201. In practice, different patients or different target tissues have different thicknesses and different clamping angle requirements, so it is particularly important to quickly adjust the opening and closing angle of the clamping unit through the adjustment seat 202 and the base 201. In some embodiments, the clamping unit is respectively connected to the base 201 and the adjustment seat 202, so that when the base 201 and the adjustment seat 202 are relatively displaced, a force can be generated on the clamping unit, thereby changing the opening and closing angle of the clamping unit. That is, there is a cooperative motion relationship between the clamping unit and the adjustment seat and / or the base. The base is provided with a first connecting portion 611, and the adjustment seat is provided with a second connecting portion 701. The first connecting portion 611 and the second connecting portion 701 are respectively arranged on two different, separate components, so that there is a matching relationship of connection or disconnection between the first connecting portion 611 and the second connecting portion 701. When the first connecting portion 611 and the second connecting portion 701 are disconnected, the adjustment seat and the base can move independently. In practice, in this state, the positional relationship between the adjustment seat and the base can be quickly changed to achieve the purpose of quickly adjusting the opening and closing angle of the clamping unit. When the first connecting portion 611 cooperates with the second connecting portion 701, the motion relationship between the base and the adjustment seat will be constrained, and the distance between the two cannot be quickly changed. However, by reasonably designing the matching structure between the first connecting portion and the second connecting portion, fine adjustment of the opening and closing angle can be achieved. In order to achieve the above-mentioned rapid adjustment and fine adjustment control, in some embodiments, the first connection part and the second connection part are connected in a clamping state, and the first connection part and the second connection part are disconnected in a non-clamping state. Furthermore, the clamping device also includes a locking unit, which can slide relative to the base and the adjustment seat. Figure 5The locking unit 301 shown can slide relative to the axis direction of the base. Specifically, the locking unit 301 is internally disposed in the inner hole of the base and can slide along the axis of the inner hole of the base, so as to adjust the positional relationship of the locking unit 301 relative to the base and the adjusting seat. When the locking unit 301 slides to the first position, the first connecting portion and the second connecting portion that have been cooperatively connected are locked and the opening and closing angle is fixed; when the locking unit slides to the second position, the first connecting portion and the second connecting portion are unlocked. As Figure 13 shown, after controlling the relative movement of the adjusting seat and the base to enable the cooperative connection of the first connecting portion and the second connecting portion, then adjusting the locking unit 301 to slide to the first position. At this position, the locking unit will restrict the positional relationship between the first connecting portion and the second connecting portion, thereby fixing the position between the base and the adjusting seat, and finally keeping the opening and closing angle of the clamping unit at the required position. Therefore, when an operator uses it, only the positional relationship between the first connecting portion and the second connecting portion needs to be adjusted so that when the opening and closing angle of the clamping unit reaches the required value, the opening and closing angle can be fixed by the locking unit. It should be noted that the "fixing" here means that the opening and closing angle is relatively stable, rather than a completely immobile state. For example, under the action of the elastic arm described later, the opening and closing angle can be finely adjusted with the acting force of the tissue, ensuring that the clamping unit stably follows the movement of the tissue and preventing the tissue from detaching from the clamping unit. As Figure 1As shown, the locking unit 301 is located at the second position and cannot provide a constraining effect on the first connecting portion and the second connecting portion. When the locking unit is in this position, only a relative fixed relationship exists between the adjusting seat and the base. The first connecting portion and the second connecting portion are not locked, and they can still move relative to each other when subjected to an external force. When the displacement between the adjusting seat and the base increases, the first connecting portion and the second connecting portion will gradually release the mating relationship, enabling the adjusting seat and the base to resume the rapid adjustment relationship. Therefore, when the operator is not satisfied with the current opening and closing angle, the locking unit can be slid from the first position to the second position to release the locking effect on the first connecting portion and the second connecting portion, and then the adjusting seat can be controlled to move away from the base so that the first connecting portion and the second connecting portion are disengaged. From the above description, it can be seen that in the above embodiment, the first connecting portion and the second connecting portion are used to control the switching between rapid adjustment and fine adjustment of the base and the adjusting seat. When the opening and closing angle of the clamping unit is in the fine adjustment state, the locking unit can lock the first connecting portion and the second connecting portion at any time, so that the opening and closing angle remains stable. When it is necessary to re-adjust the opening and closing angle, only the locking unit needs to be slid to release the constraint on the first connecting portion and the second connecting portion. The locking unit can provide a stable locking effect, avoiding the problem that the opening and closing angle of the clamping unit is unstable under the action of an external force during the instrument clamping state. At the same time, the locking unit can be switched between the locked state and the unlocked state by sliding to change its position, enabling the instrument to easily, safely and reliably lock the opening and closing angle, with a simple structure and low cost. In addition, as Figure 2 and 3 shown, to solve the problem in the prior art that a stable clamping force cannot be provided for the target tissue at a large closing angle, in this embodiment, the clamping unit includes at least two upper clamping arms 205, and any one of the upper clamping arms includes at least two stacked clamping sheets. In practice, the clamping sheets have superelasticity and can recover their deformation after the external force constraint is removed, so as to cooperate with the lower clamping arm to clamp the target tissue. When two or more clamping sheets are provided and stacked, each clamping sheet jointly provides a stable clamping force to the target tissue, enabling the instrument to work at a large closing angle and making it possible to avoid damage to the target tissue. It can be understood that the number of the clamping sheets can be flexibly selected according to actual needs.

[0060] In some alternative embodiments, such as Figure 10 and 11As shown, the adjusting seat includes a locking portion 803 and an unlocking portion 802. The locking unit can selectively cooperate with the locking portion and the unlocking portion to switch the locking unit between a first position and a second position. Specifically, the locking unit includes an elastic pressing piece 3013, and the elastic pressing piece can selectively cooperate with the locking portion and the unlocking portion. For example, the locking unit can be sleeved on the adjusting seat and move along the axial direction of the adjusting seat. When it slides close to the bottom end of the adjusting seat, the elastic pressing piece engages with the unlocking portion 802, and the adjusting seat is unlocked from the base. When it slides away from the bottom end of the adjusting seat, the elastic pressing piece engages with the locking portion 803, and the adjusting seat is locked to the base. Preferably, both the locking portion and the unlocking portion are groove structures, and the elastic pressing piece only needs to cooperate with the locking portion and the unlocking portion at different positions respectively to achieve the locking and unlocking control of the adjusting seat and the base, greatly reducing the structural manufacturing cost and the convenience of operation.

[0061] In some alternative embodiments, the locking unit includes a pushing portion for locking or unlocking the first connecting portion and the second connecting portion; and when the elastic pressing piece cooperates with the unlocking portion, the locking unit is in the second position; when the elastic pressing piece cooperates with the locking portion, the locking unit is in the first position. As Figure 1 , Figures 11 to 13 shown in the embodiment, the locking unit includes a pushing portion 101 located at one end of the locking unit and close to the adjusting seat. A pushing surface 3011 is provided on the outer wall surface of the pushing portion 101, and the pushing surface is used for locking or unlocking the first connecting portion and the second connecting portion. Since the pushing surface is used as the locking and unlocking element, it is simpler and more efficient to unlock or lock the first connecting portion and the second connecting portion by sliding, and the manufacturing cost is low. Further, a through hole 3012 of the locking unit is provided at the center of the locking unit, and the through hole 3012 of the locking unit enables the locking unit to be sleeved on the adjusting seat and slid relative to the adjusting seat. When the locking unit is in the second position, it cannot provide a pushing effect on the first connecting portion and the second connecting portion, so that the first connecting portion and the second connecting portion are kept in an unlocked state. When the locking unit is in the first position, the pushing portion is in the first position and provides a locking effect on the first connecting portion and the second connecting portion. As Figure 9 shown in the example, a second connecting portion extending along the axis of the base is provided on the adjusting seat, and a pushing surface 702 is provided on the portion of the second connecting portion close to the axis. As Figure 1 and 3 shown, when the elastic pressing piece engages with the unlocking portion, one end of the pushing portion is restricted to abut against the end face of the adjusting seat, so as to ensure that the first connecting portion and the second connecting portion are not locked.

[0062] In some alternative embodiments, the pushing portion includes a groove, and the adjusting seat is slidable within the groove. As Figures 5 - 6 and Figure 11 shown in the embodiment, the pushing surface 3011 is formed within the groove, and the portion of the adjusting seat provided with the pushing surface 702 is slidable within the groove. In other words, the locking unit reciprocally slides relative to the adjusting seat through the groove. Due to the arrangement of the groove structure, the locking unit can only axially slide relative to the adjusting seat, avoiding circumferential rotation. As Figure 10 and 11 shown in the embodiment, the elastic pressing piece and the pushing surface are arranged at different circumferential positions. Therefore, in order to ensure that the elastic pressing piece can stably and reliably engage with the unlocking portion or the locking portion, it is very necessary to limit the circumferential rotation of the locking unit through the groove.

[0063] In some alternative embodiments, the adjusting seat includes a central shaft portion 302, and the locking portion and the unlocking portion are provided on the central shaft portion. As Figure 10 shown in the embodiment, the adjusting seat includes a central shaft portion, and the central shaft portion can be an independent component and is fixed to the adjusting seat by means such as welding or screw fitting; of course, the central shaft portion can also be integrally formed with the adjusting seat as a part. As Figure 10 shown, a second interface portion 805 is provided at the top end of the central shaft portion. In some embodiments, the bottom end of the adjusting seat is provided with an unlocking surface 801 for restricting the displacement amount of the pushing portion in the direction approaching the adjusting seat, avoiding the locking unit from detaching from the instrument. At the same time, the unlocking surface can also prompt the user that the locking unit has reached the limit position and the locking function between the first connecting portion and the second connecting portion has been released. It can be understood that during the operation process, the user only needs to control the locking unit to slide towards the adjusting seat and can confirm that the unlocking operation is completed when it is found that it cannot slide further.

[0064] In some alternative embodiments, the end of the central shaft portion close to the base is connected to the conveying system, and the conveying system adjusts the position of the central shaft portion to change the position of the adjusting seat relative to the base and adjusts the mating state between the first connecting portion and the second connecting portion. As Figure 10 shown in the embodiment, the second interface portion is used to connect to the conveying system, so as to change the relative position between the adjusting seat and the base through the conveying system. As Figure 9In the illustrated embodiment, at least one second connecting portion 701 is provided at one end of the adjusting seat close to the base, and a socket 703 is provided at the end far from the base. The socket 703 can be a through hole, so that the central shaft portion can penetrate into the socket 703 and be fixedly connected to the socket 703. As Figure 8 shown, at least one first connecting portion is provided in the stepped hole of the base close to the adjusting seat. In the mating state, the second connecting portion is inserted into the stepped hole and snap-connected to the first connecting portion.

[0065] In some alternative embodiments, the first connecting portion includes a plurality of first clamping portions extending along the axial direction of the base; the second connecting portion includes a plurality of second clamping portions extending along the axial direction of the adjusting seat; at least one of the first clamping portions is selectively snap-connected to at least one of the second clamping portions to enable multi-stage adjustment of the opening and closing angle. As Figure 8 and 9 shown in the embodiment, the first connecting portion includes a plurality of continuously arranged first clamping portions, the second connecting portion includes a plurality of continuously arranged second clamping portions, and the first clamping portions and the second clamping portions are correspondingly arranged so that the first clamping portions can be smoothly snapped into the second clamping portions. It can be understood that the more the number of the first clamping portions and the second clamping portions is set and the higher the density is, the higher the accuracy of the opening and closing angle that can be achieved by the fine adjustment is. In some embodiments, both the first clamping portion and the second clamping portion are in the shape of connected sawteeth or racks. As Figure 13 and Figure 14 shown in the embodiment, the first connecting portion and the second connecting portion can be snap-connected at different positions to realize the adjustment of different opening and closing angles. As Figure 13 shown, the first connecting portion and the second connecting portion are snap-connected at the first snap-connection position 1201, and the contact portion at this position is the most, and at this time the opening and closing angle of the instrument is the smallest. As Figure 14 shown, the first connecting portion and the second connecting portion are snap-connected at the second snap-connection position 1202, and the contact portion at this position becomes less compared with the first snap-connection position, and at this time the opening and closing angle of the instrument is Figure 13 larger than that at the position. Thus, the instrument can finely adjust the opening and closing angle of the clamping unit to keep different clamping states to adapt to tissues of different thicknesses, increasing the scope of use of the instrument.

[0066] As Figure 2 in the described embodiment, a first interface portion 206 is provided at the end of the base far from the adjusting seat, and the first interface portion 206 is used to connect to the delivery system and move into the body under the control of the delivery system and move to the target position. Correspondingly, as Figure 11As shown, a fourth interface portion 3014 is provided at one end of the locking unit away from the adjustment base. The fourth interface portion is used for connection with a conveying system and is controlled by the conveying system to change the position of the locking unit relative to the base and / or the adjustment base.

[0067] In some alternative embodiments, the clamping unit includes at least two lower clamping arms. Each of the lower clamping arms is pivotally connected to the base and can form different opening and closing angles under the action of the movement of the adjustment base relative to the base. As Figures 2 to 5 shown in the embodiment, a fulcrum 601 is provided on the base for mounting the lower clamping arm 203. The fulcrums are distributed at intervals of 180° in the circumferential direction. Two through holes are provided at one end of the lower clamping arm and are respectively sleeved and connected with the fulcrums, so that the lower clamping arm can rotate along the fulcrum 601. The medical device further includes an elastic arm 204. Two ends of the elastic arm 204 are respectively connected to the adjustment base and the lower clamping arm through a first rotating shaft 208 and a second rotating shaft 209. Among them, the second rotating shaft 209 is pivotally connected to the middle of the lower clamping arm. The first rotating shaft 208 is pivotally connected to the base. When the base moves relative to the adjustment base, the adjustment base transfers the load to the lower clamping arm through the elastic arm to adjust the opening and closing state of the lower clamping arm. Advantageously, after clamping, the elastic arm can be compressed, so that the closing angle of the clamping arm can adapt to target tissues of different thicknesses, improving the compatibility of the instrument. As Figure 17 shown in the embodiment, the elastic arm and the adjustment base can be formed as an integral part, or the elastic arm is directly fixedly connected to the adjustment base without being connected to the adjustment base through a rotating shaft. In this fixedly connected state, the elastic arm can undergo elastic deformation and thus can rotate around the connection point with the adjustment base, thereby changing the size of the included angle 1401 of the elastic arm. In some alternative embodiments, the total number of fulcrums 601 is 4 and is divided into 2 groups. Each group is respectively hinged to the end of a lower clamping arm. The two groups of fulcrums are symmetrically arranged in the circumferential direction. Correspondingly, two through holes are respectively provided at the end of each lower clamping arm for hinging with its corresponding 2 fulcrums. After assembly, the lower clamping arms are distributed at 180° in the circumferential direction and can rotate along their respective hinged fulcrums to approach or move away from each other. In this design, the geometric structures of the two lower clamping arms can be set to be the same, thereby reducing the manufacturing cost and facilitating assembly.

[0068] In some alternative embodiments, the clamping unit further includes at least two upper clamping arms 205. Each of the upper clamping arms is connected to the base and can be driven to approach or move away from the lower clamping arm. As Figure 2As shown, the end of the upper clamping arm is fixedly connected to the base, so that the upper clamping arm can rotate along the fixed point. Further, a plurality of barbs are protruding on the side of the upper clamping arm facing the lower clamping arm. When the clamping portion 1302 formed by the lower clamping arm and the upper clamping arm abuts against and clamps the target tissue 1302, the barbs penetrate into the target tissue so that the clamping arm stably anchors the target tissue. As Figure 2 In the embodiment described above, a third interface portion 207 is further provided at the free end of the upper clamping arm to be connected to the wire of the delivery system. The other end of the wire extends to the proximal end through the delivery system to facilitate the operation of the operator. The wire is used to adjust the opening angle of the upper clamping arm. In some alternative embodiments, the upper clamping arm is made of a memory material. It can be understood that only when the upper clamping arm has sufficient elastic restoring force, can it stably cooperate with the lower clamping arm after removing the pulling force of the wire and provide sufficient clamping load for the target tissue. As Figures 15 to 16 In the embodiment shown, after reaching the position of the target tissue, the upper clamping arm and the lower clamping arm can be first controlled to move to clamp the target tissue shown, then the positions of the first connecting portion and the second connecting portion are adjusted, and finally the two connecting portions are locked by the locking unit to form Figure 16 The closed state to complete the instrument implantation process.

[0069] The above specific embodiments do not constitute a limitation to the protection scope of the present disclosure. Those skilled in the art will readily think of other implementation manners of the present disclosure after considering the specification and practicing the technical solutions disclosed in the present application. The present application aims to cover any variations, uses or adaptations of the present disclosure, and these variations, uses or adaptations follow the general principles of the present disclosure and include the common general knowledge or conventional technical means in the technical field not disclosed in the present disclosure. The specification and the embodiments are only regarded as exemplary, and the true scope and spirit of the present disclosure are pointed out by the following claims.

[0070] It should be understood that the present disclosure is not limited to the exact structures already described and shown in the drawings, and various modifications and changes can be made without departing from its scope. The scope of the present disclosure is only limited by the appended claims.

Claims

1. A valve clamping device with adjustable closing angle, comprising: A base and an adjusting seat, wherein the adjusting seat moves relative to the base to adjust the opening and closing angle of the clamping unit; A clamping unit, which is respectively connected to the base and the adjusting seat; Characterized in that, The clamping unit includes at least two upper clamping arms, and any one of the upper clamping arms includes at least two stacked clamping pieces; It further includes a locking unit, which can slide relative to the base and the adjusting seat; When the locking unit slides to the first position, the base and the adjusting seat are locked; when the locking unit slides to the second position, the base and the adjusting seat are unlocked; The adjusting seat includes a locking part and an unlocking part, and the locking unit can selectively cooperate with the locking part and the unlocking part to realize the switching of the locking unit between the first position and the second position; The locking unit includes an elastic pressing piece, and the elastic pressing piece can selectively cooperate with the locking part and the unlocking part.

2. The clamping device according to claim 1, characterized in that, The base is provided with a first connecting part; The adjusting seat is provided with a second connecting part; In the clamping state, the first connecting part and the second connecting part are cooperatively connected, and in the non-clamping state, the first connecting part and the second connecting part are disconnected; If the locking unit slides to the first position, the cooperatively connected first connecting part and second connecting part are locked and the opening and closing angle is fixed; if the locking unit slides to the second position, the first connecting part and the second connecting part are unlocked.

3. The clamping device according to claim 2, characterized in that, The locking unit includes a pushing part, and the pushing part is used to lock or unlock the first connecting part and the second connecting part; and when the elastic pressing piece cooperates with the unlocking part, the locking unit is in the second position; when the elastic pressing piece cooperates with the locking part, the locking unit is in the first position.

4. The clamping device according to claim 3, characterized in that, The pushing part includes a groove, and the adjusting seat can slide in the groove.

5. The clamping device according to claim 4, characterized in that, The adjusting seat includes a central shaft part, and a locking part and an unlocking part are arranged on the central shaft part.

6. The clamping device according to claim 5, characterized in that, The end of the central shaft part close to the base is connected to a conveying system, and the conveying system adjusts the position of the central shaft part to change the position of the adjusting seat relative to the base and adjusts the cooperation state of the first connecting part and the second connecting part.

7. The clamping device according to claim 3, characterized in that, The first connecting part includes a plurality of first clamping parts extending along the axial direction of the base; The second connecting part includes a plurality of second clamping parts extending along the axial direction of the adjusting seat; At least one of the first clamping parts is selectively clamped with at least one of the second clamping parts, so that the opening and closing angle is adjustable in multiple levels.

8. The clamping device according to claim 2, characterized in that, The clamping unit includes at least two lower clamping arms, each of the lower clamping arms is pivotally connected to the base respectively, and can form different opening and closing angles under the action of the movement of the adjusting seat relative to the base.

9. The clamping device according to claim 8, wherein Each of the upper clamping arms is connected to the base respectively, and can be driven to approach or move away from the lower clamping arms.

10. The clamping device according to claim 9, wherein The clamping unit further includes an elastic arm, one end of the elastic arm is pivotally connected to the lower clamping arm; the other end of the elastic arm is pivotally connected to the adjusting seat, or the other end of the elastic arm is fixedly connected to the adjusting seat.

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