Valve clamping forceps

Abstract

The invention belongs to the technical field of medical instruments, and discloses a pair of valve clamping forceps which comprises a transmission part, a locking sleeve, a connecting arm, a first clamping arm and a locking part, the transmission part comprises a guide rod and a hinge seat arranged at the far end of the guide rod, and the guide rod is provided with a first clamping part; the locking sleeve slidably sleeves the guide rod; the first end of the connecting arm is hinged to the hinge seat; a first hinge part of the first clamping arm is hinged to the locking sleeve, and a second hinge part of the first clamping arm is hinged to the second end of the connecting arm; the locking piece is arranged on the locking sleeve and comprises an elastic main body and a second clamping part arranged on the elastic main body. Wherein the elastic main body has a natural state and a deformation state; in a natural state, the first clamping part is clamped with the second clamping part; in the deformation state, the first clamping part is separated from the second clamping part. According to the valve clamping forceps provided by the invention, the situations that locking fails and the first clamping part and the second clamping part are locked and cannot be used are effectively prevented.

Description

Technical Field

[0001] This invention relates to the field of medical device technology, and in particular to a valve clamping forceps. Background Technology

[0002] The mitral valve is a part of the heart located between the left atrium and the left ventricle. Blood is pumped from the left atrium into the left ventricle. When the left ventricle contracts and pumps blood throughout the body, the mitral valve closes to prevent blood from being pumped back into the left atrium. In some patients, due to genetic malformations, diseases, or injuries, the mitral valve cannot close properly, leading to a condition called regurgitation, where blood is pumped into the atrium with each contraction of the heart muscle. This is a serious and often rapidly deteriorating condition that reduces circulatory efficiency.

[0003] Currently, mitral regurgitation is one of the most common valvular diseases. The main causes include mitral annular dilatation, chordae tendineae insufficiency, mitral myxomatosis, leaflet prolapse, rheumatic valvular heart disease, and ischemic lesions. Open-heart mitral valve repair and artificial valve replacement are the most effective treatments for mitral regurgitation. However, because these surgeries require cardiopulmonary bypass, they are highly invasive and carry a significant risk of complications and mortality, especially in elderly patients and those with multiple comorbidities.

[0004] In recent years, the mainstream mitral valve clipping devices on the market are divided into two types: implantation via the femoral vein and implantation via the apex. The transapical mitral valve clipping device, as a key area of ​​research and development in cardiovascular devices both domestically and internationally, uses an implantable clip delivered to the vicinity of the mitral valve via the apex to clamp and fix the free edges of the anterior and posterior leaflets, ensuring good leaflet closure at end-systole and reducing regurgitation. However, existing transapical mitral valve clipping devices may experience clip locking failure or become unusable. Summary of the Invention

[0005] The purpose of this invention is to provide a valve clamp to solve the problem of locking structure failure or lockout rendering it unusable.

[0006] To achieve this objective, the present invention adopts the following technical solution:

[0007] A valve clamp is provided, comprising:

[0008] The transmission component includes a phase guide rod and a hinge seat disposed at the distal end of the guide rod. The guide rod extends along a first direction and is provided with a first locking portion along a second direction.

[0009] A locking sleeve is slidably fitted onto the guide rod;

[0010] A connecting arm, the first end of which is hinged to the hinge seat;

[0011] A first clamping arm, the first clamping arm having a first hinge portion and a second hinge portion, the first hinge portion being hinged to the locking sleeve, and the second hinge portion being hinged to the second end of the connecting arm;

[0012] A locking element is disposed on the locking sleeve and located on the side of the guide rod where the first engaging portion is provided along the second direction. The locking element includes an elastic body and a second engaging portion disposed on the elastic body; wherein...

[0013] In the second direction, the elastic body has a natural state and a deformed state;

[0014] In its natural state, the first latching part and the second latching part are latched together;

[0015] In the deformed state, the first snap-fit ​​portion separates from the second snap-fit ​​portion.

[0016] Optionally, the elastic body includes a first fan ring and a second fan ring disposed opposite to each other along a first direction, a second snap-fit ​​portion is formed between the first end of the first fan ring and the first end of the second fan ring, the first fan ring is connected to the locking sleeve, and the second fan ring can be connected to a traction wire.

[0017] Optionally, an opening is provided between the second end of the first fan ring and the second end of the second fan ring.

[0018] Optionally, the elastic body further includes a positioning part, wherein the second end of the first fan ring extends inward to form the positioning part, and the positioning part is connected to the locking sleeve.

[0019] Optionally, the center of the positioning part is arranged to coincide with the center of the elastic body.

[0020] Optionally, one of the positioning part and the locking sleeve is provided with a positioning hole, and the other is provided with a positioning shaft, which is inserted into the positioning hole.

[0021] Optionally, the second sector ring is provided with a traction part, the traction part is provided with a through hole along a third direction, the center of the through hole and the center of the positioning part are connected by a line parallel to the first direction, and the traction wire passes through the through hole.

[0022] Optionally, the second end of the second fan ring protrudes circumferentially from the traction portion along the elastic body.

[0023] Optionally, the second sector ring is provided with a traction part, the traction part is provided with a through hole along a third direction, and the traction wire passes through the through hole;

[0024] The locking sleeve is provided with a limiting protrusion. In the deformed state, the traction part and the limiting protrusion abut against each other along the first direction.

[0025] Optionally, the first snap-fit ​​portion is groove-shaped and includes two first limiting surfaces arranged at an angle; the second snap-fit ​​portion is protruding and includes two second limiting surfaces arranged at an angle; in the natural state, the first limiting surfaces and the second limiting surfaces correspond to each other and fit together.

[0026] Beneficial effects:

[0027] The valve clamp provided by this invention features a locking member whose elastic body, in a deformed state, separates the first and second engaging portions. The locking sleeve can slide relative to the guide rod and, through the connecting arm, drives the first clamping arm to rotate, thus opening and closing the first clamping arm. In its natural state, the first and second engaging portions engage to form a limit, keeping the locking sleeve and the transmission component relatively fixed to lock the first clamping arm stably and reliably, effectively preventing locking failure. Furthermore, the expansion or contraction of the elastic body along a second direction ensures smooth and unobstructed engagement and disengagement of the second and first engaging portions, effectively preventing the first and second engaging portions from locking together and rendering the clamp unusable. Attached Figure Description

[0028] Figure 1 This is a cross-sectional view of the valve clamp provided by the present invention when the first clamp arm is closed;

[0029] Figure 2 This is a partial cross-sectional view of the valve clamp provided by the present invention when the first clamp arm is closed;

[0030] Figure 3 This is a cross-sectional view of the valve clamp provided by the present invention when the first clamping arm is open;

[0031] Figure 4 This is a partial cross-sectional view of the valve clamp provided by the present invention when the first clamping arm is open;

[0032] Figure 5 This is a schematic diagram of the valve clamp provided by the present invention;

[0033] Figure 6 This is a schematic diagram of the locking element of the elastic body in its natural state provided by the present invention from one perspective.

[0034] Figure 7 This is a schematic diagram of the locking element of the elastic body in its natural state provided by the present invention from another perspective.

[0035] Figure 8 This is a schematic diagram of the structure of the locking member of the elastic body in the deformed state provided by the present invention;

[0036] Figure 9This is a schematic diagram of the locking sleeve provided by the present invention from one perspective;

[0037] Figure 10 This is a schematic diagram of the locking sleeve provided by the present invention from another perspective;

[0038] Figure 11 This is a partial cross-sectional view of the valve clamp provided by the present invention;

[0039] Figure 12 This is a schematic diagram of the transmission component provided by the present invention from one perspective;

[0040] Figure 13 This is a schematic diagram of the transmission component provided by the present invention from another perspective;

[0041] Figure 14 This is a cross-sectional view of the valve clamp provided by the present invention.

[0042] In the picture:

[0043] 100. Transmission component; 110. Guide rod; 111. First locking part; 1111. First limiting surface; 120. Hinge seat;

[0044] 200. Locking sleeve; 201. Positioning hole; 210. Limiting protrusion; 211. Rounded corner;

[0045] 300. Connecting arm; 310. First pin;

[0046] 400, First clamping arm; 410, Second pin; 420, Third pin;

[0047] 500, Locking element; 501, Opening; 510, Elastic body; 511, First sector ring; 512, Second sector ring; 520, Second locking part; 521, Second limiting surface; 530, Positioning part; 531, Positioning shaft; 540, Traction part; 541, Through hole;

[0048] 600. Second clamping arm; 610. Clamping part;

[0049] 700, traction wire. Detailed Implementation

[0050] The present invention will now be described in further detail with reference to the accompanying drawings and embodiments. It should be understood that the specific embodiments described herein are merely illustrative of the invention and not intended to limit it. Furthermore, it should be noted that, for ease of description, the accompanying drawings show only the parts relevant to the present invention, and not all of the structures.

[0051] In the description of this invention, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this invention based on the specific circumstances.

[0052] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0053] In the description of this embodiment, the terms "upper," "lower," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on the present invention. In addition, the terms "first" and "second" are used only for distinction in description and have no special meaning.

[0054] Reference Figures 1 to 4 As shown, this embodiment provides a valve clamp, which includes a transmission component 100, a locking sleeve 200, a connecting arm 300, a first clamping arm 400, and a locking component 500.

[0055] Specifically, the transmission component 100 includes a guide rod 110 and a hinge seat 120 disposed at the distal end of the guide rod 110. The guide rod 110 extends along a first direction and has a first engaging portion 111 along a second direction. In the figure, direction a represents the first direction, and direction b represents the second direction; the first and second directions can be perpendicular to each other. In this embodiment, the distal end of the guide rod 110 refers to the end that first inserts into the body during surgery, and the proximal end of the guide rod 110 refers to the opposite end of the distal end. Furthermore, the definitions of the proximal and distal ends of other components in this embodiment are the same as those of the proximal and distal ends of the guide rod 110, and will not be elaborated further in this application.

[0056] Specifically, the locking sleeve 200 is slidably sleeved on the guide rod 110; the first end of the connecting arm 300 is hinged to the hinge seat 120; the first clamping arm 400 is provided with a first hinge portion (not shown) and a second hinge portion (not shown), the first hinge portion is hinged to the locking sleeve 200, and the second hinge portion is hinged to the second end of the connecting arm 300; the locking member 500 is provided on the locking sleeve 200 and is located on the side of the guide rod 110 where the first latching portion 111 is provided along the second direction, the locking member 500 includes an elastic body 510 and a second latching portion 520 provided on the elastic body 510. The first hinge portion may be provided at the first end of the first clamping arm 400, the second hinge portion may be provided in the area between the first end and the second end of the first clamping arm 400, and the second end of the first clamping arm 400 is a free end.

[0057] In the second direction, the elastic body 510 has a natural state and a deformed state; in the natural state, the first engaging portion 111 engages with the second engaging portion 520; in the deformed state, the first engaging portion 111 and the second engaging portion 520 separate. It can be understood that during the process of the elastic body 510 transitioning from the natural state to the deformed state, the second engaging portion 520 gradually detaches from the first engaging portion 111 along the second direction; during the process of the elastic body 510 transitioning from the natural state to the deformed state, the second engaging portion 520 gradually approaches and engages with the first engaging portion 111 along the second direction.

[0058] In the deformed state, the elastic body 510 of the locking member 500 separates the first engaging portion 111 from the second engaging portion 520, allowing the locking sleeve 200 to slide relative to the guide rod 110 and rotate the first clamping arm 400 via the connecting arm 300, thus opening and closing the first clamping arm 400. In its natural state, the elastic body 510 of the locking member 500 engages with the first engaging portion 111 to form a limit, keeping the locking sleeve 200 and the transmission member 100 relatively fixed to lock the first clamping arm 400, ensuring stability and reliability and effectively preventing locking failure. The expansion or contraction of the elastic body 510 along the second direction ensures smooth and unobstructed engagement and disengagement of the second engaging portion 520 from the first engaging portion 111, effectively preventing the first engaging portion 111 from locking and the second engaging portion 520 from becoming unusable. It is understandable that when the first clamping arm 400 is closed, the elastic body 510 of the locking member 500 is in a natural state, and the first locking part 111 and the second locking part 520 are engaged.

[0059] In the prior art, the locking structure used to lock the locking sleeve 200 and the transmission member 100 includes at least one elastic member and one snap-fit ​​member. In this embodiment, a single locking member 500 can lock the locking sleeve 200 and the transmission member 100. The structure is simple, effectively improves production and assembly efficiency, and reduces the overall weight of the valve clamp, which can reduce the burden on the heart.

[0060] For example, the transmission component 100 can be made of a high-strength alloy.

[0061] For example, the locking sleeve 200 can be made of medical-grade metal, such as cobalt-chromium alloy.

[0062] In this embodiment, reference is made to Figure 3 and Figure 5 As shown, the valve clamping forceps also includes a second clamping arm 600, which can clamp the valve leaflets together with the first clamping arm 400. The second clamping arm 600 can be made of an elastic material. Both the connecting arm 300 and the first clamping arm 400 are provided in pairs, corresponding one-to-one. The second clamping arm 600 includes two clamping portions 610 corresponding to the first clamping arm 400, which can clamp the valve leaflets together. When not subjected to external force, the second clamping arm 600 is in an extended state. In the extended state, the angle between the two clamping portions 610 is maintained at its maximum. The second clamping arm 600 can be pulled towards the guide rod 110 by a pull cable, i.e., the angle between the two clamping portions 610 gradually decreases. For example, the second clamping arm 600 can be fixed to the locking sleeve 200.

[0063] For example, the first end of the connecting arm 300 can be hinged to the hinge seat 120 by a first pin 310, which can be welded to the connecting arm 300.

[0064] For example, the first hinge portion and the locking sleeve 200 can be hinged by a second pin 410, which can be welded to the first hinge portion of one of the first clamping arms 400.

[0065] For example, the second hinge portion and the second end of the connecting arm 300 can be hinged by a third pin 420, which can be welded to the second hinge portion or the connecting arm 300.

[0066] For example, the hinge seat 120 and the guide rod 110 can be integrally formed. The transmission member 100 can be T-shaped, and the connecting arm 300 is hinged to the corresponding end of the hinge seat 120 along the second direction.

[0067] For example, the side of the hinge seat 120 facing away from the guide rod 110 along the first direction may be arc-shaped to be suitable for delivery within the body.

[0068] In this embodiment, the proximal end of the guide rod 110 and the proximal end of the locking sleeve 200 are both used to connect to the delivery system, which, in conjunction with the valve clamping forceps, can complete the surgery. Exemplarily, the end of the guide rod 110 facing away from the hinge seat 120 along the first direction has a threaded structure that can be connected to the delivery system, facilitating assembly and disassembly. The delivery system is prior art and will not be described in detail here.

[0069] In this embodiment, reference is made to Figures 6 to 8 As shown, the elastic body 510 includes a first sector ring 511 and a second sector ring 512 disposed opposite to each other along a first direction. A second engaging portion 520 is formed between the first end of the first sector ring 511 and the first end of the second sector ring 512. The first sector ring 511 is connected to the locking sleeve 200, and the second sector ring 512 can be connected to the traction wire 700. When the first engaging portion 111 and the second engaging portion 520 are unlocked, the traction wire 700 is pulled, causing the first sector ring 511 and the second sector ring 512 to be stretched along the first direction, thereby causing the first sector ring 511 and the second sector ring 512 to narrow along the second direction. The elastic body 510 switches from a natural state to a deformed state, making unlocking convenient. The first sector ring 511 and the second sector ring 512 are stretched along the first direction. Understandably, the curvature of the elastic body 510 in the second direction decreases, meaning the sector ring portion connecting the elastic body 510 to the second locking part 520 deforms towards a straight shape. It's worth noting that in the deformed state, the sector ring portion connected to the second locking part 520 does not reach a straight state; it still retains a certain curvature. Therefore, a small pulling force is not required to switch the elastic body 510 from its natural state to its deformed state. The smaller unlocking pulling force effectively prevents damage to the first locking part 111 and the second locking part 520. Releasing the traction wire 700 restores the deformation of the first sector ring 511 and the second sector ring 512, allowing the elastic body 510 to switch from its deformed state to its natural state, facilitating operation.

[0070] For example, the locking element 500 may be made of shape memory alloy.

[0071] In one feasible implementation, an opening 501 is provided between the second end of the first sector ring 511 and the second end of the second sector ring 512, meaning the elastic body 510 can be configured as an open ring structure. The opening 501 can be disposed opposite to the second locking portion 520 along a second direction. In this embodiment, the opening 501 is more suitable for deformation of the first sector ring 511 and the second sector ring 512, effectively reducing the unlocking pull on the traction wire 700 and effectively preventing the first locking portion 111 and the second locking portion 520 from locking and becoming unusable. Exemplarily, the elastic body 510 can be configured as a polygonal open ring, an elliptical open ring, or an open ring structure of other shapes. Of course, the elastic body 510 may also be without an opening.

[0072] In one feasible embodiment, the elastic body 510 further includes a positioning part 530. The second end of the first sector ring 511 extends inward to form the positioning part 530, which is connected to the locking sleeve 200. The positioning part 530 is designed to change the deformation trend of the first sector ring 511 and the second sector ring 512 when the elastic body 510 switches states, stabilizing the orientation of the second engaging part 520. This makes the second engaging part 520 suitable for engaging or disengaging with the first engaging part 111, effectively reducing the unlocking pull on the traction wire 700 and preventing the second engaging part 520 from failing to engage with the first engaging part 111 due to orientation changes. Alternatively, the positioning part 530 can extend outward, or the second end of the first sector ring 511 can be directly connected to the locking sleeve 200.

[0073] For example, the center of the positioning portion 530 is aligned with the center of the elastic body 510 to further stabilize the orientation of the second snap-fit ​​portion 520. It is understood that the elastic body 510 may be a spiral structure.

[0074] In this embodiment, reference is made to Figures 6 to 10 As shown, one of the positioning part 530 and the locking sleeve 200 is provided with a positioning hole 201, and the other is provided with a positioning shaft 531. The positioning shaft 531 is inserted into the positioning hole 201 for convenient positioning and assembly.

[0075] For example, the positioning part 530 is provided with a positioning shaft 531, and the locking sleeve 200 is provided with a positioning hole 201 to facilitate the molding and manufacturing of both. The positioning shaft 531 can be fixed within the positioning hole 201 to stabilize the orientation of the second snap-fit ​​part 520. For example, the positioning shaft 531 can be fixed within the positioning hole 201 by welding, shape limiting, or other methods. Shape limiting, for example, involves setting the cross-sections of the positioning shaft 531 and the positioning hole 201 to a polygonal shape.

[0076] In this embodiment, reference is made to Figures 6 to 11 As shown, the second sector ring 512 is provided with a traction part 540, and the traction part 540 has a through hole 541 along a third direction. The traction wire 700 passes through the through hole 541 to facilitate the connection of the traction wire 700. In the figure, direction c is the third direction, and the first direction, the second direction and the third direction can be perpendicular to each other.

[0077] In one feasible implementation, the line connecting the center of the perforation 541 and the center of the positioning portion 530 is parallel to the first direction to stabilize the orientation of the second engaging portion 520. The traction wire 700 can pull the traction portion 540 along the second direction to further stabilize the orientation of the second engaging portion 520. Alternatively, the line connecting the center of the perforation 541 and the center of the positioning portion 530 can be set at an angle to the first direction.

[0078] In one feasible implementation, the second end of the second fan ring 512 protrudes circumferentially from the traction portion 540 along the elastic body 510 to improve the stress distribution of the second fan ring 512 and stabilize the orientation of the second snap-fit ​​portion 520.

[0079] In one feasible implementation, the locking sleeve 200 is provided with a limiting protrusion 210. In the deformed state, the traction part 540 and the limiting protrusion 210 abut against each other in the first direction to form a limit, so as to prevent the elastic body 510 from being overstretched and causing permanent deformation, and to ensure the safety of the valve clamp.

[0080] For example, the first end of the traction wire 700 can be located on the first side of the limiting protrusion 210 along a third direction, and the second end of the traction wire 700 can be located on the second side of the limiting protrusion 210 along a third direction. This effectively prevents the traction wire 700 from becoming entangled and affecting the pulling of the traction part 540, and avoids the traction wire 700 from being damaged by being squeezed by the limiting protrusion 210 and the traction part 540. Specifically, the limiting protrusion 210 has rounded corners 211 on both sides of its side facing the traction part 540 along the third direction to prevent the traction wire 700 from being cut by the limiting protrusion 210.

[0081] In one feasible implementation, the elastic body 510 can also be semi-annular or V-shaped. Specifically, the first end of the elastic body 510 is connected to the locking sleeve 200, and the other end is provided with a second snap-fit ​​portion 520. The middle region of the elastic body 510 is connected to the traction wire 700. To realize the expansion and contraction of the elastic body 510 along the second direction, a guide surface can be provided on the locking sleeve 200 to constrain the deformation of the elastic body 510. In its natural state, the first end and the second end of the elastic body 510 can be arranged opposite each other along the second direction. Of course, the elastic body 510 can also have other shapes and structures, which are not limited in this application.

[0082] In this embodiment, reference is made to Figures 6 to 8 , Figures 12 to 14As shown, the first locking portion 111 is groove-shaped and includes two first limiting surfaces 1111 set at an angle; the second locking portion 520 is protruding and includes two second limiting surfaces 521 set at an angle. In the natural state, the first limiting surfaces 1111 and the second limiting surfaces 521 are in one-to-one contact to stably lock the first clamping arm 400 and prevent locking failure. In this embodiment, when the elastic body 510 switches from the natural state to the deformed state, the first fan ring 511 and the second fan ring 512 are stretched along the first direction, the angle between the two first limiting surfaces 1111 increases and squeezes the corresponding second limiting surfaces 521, allowing the second locking portion 520 to disengage more smoothly from the first locking portion 111. The angle between the two first limiting surfaces 1111 can be 90°-150°, for example, 120° or 135°.

[0083] For example, in order to ensure that the first snap-fit ​​portion 111 has good strength and that the snap-fit ​​with the second snap-fit ​​portion 520 is stable, the cross section of the guide rod 110 is set to be rectangular.

[0084] For example, the first snap-fit ​​portion 111 may be provided in multiple ways along the first direction so that the first clamping arm 400 has multiple closed positions, thereby enabling the valve clamping forceps to clamp and fix valve leaflets of different thicknesses, improving applicability.

[0085] For example, the specific steps for using the valve clamp provided in this embodiment are as follows:

[0086] S100, Deliver the valve clamp into the heart;

[0087] Before conveying, the first clamping arm 400 is closed and the second clamping arm 600 is in a retracted state under the pull of the pull line.

[0088] S200, pass the two first clamping arms 400 through the two leaflets of the mitral valve, pull the traction wire 700 to disengage the second locking part 520 from the first locking part 111, and slide the guide rod 110 to the distal end relative to the locking sleeve 200 to open the first clamping arms 400.

[0089] The sliding of the guide rod 110 is accomplished through a conveying system.

[0090] S300, retract the valve clamp so that the two first clamping arms 400 support the two leaflets in a one-to-one correspondence;

[0091] S400: Release the pull line to allow the second clamping arm 600 to unfold, and the clamping part 610 clamps the corresponding leaflet with the corresponding first clamping arm 400.

[0092] S500, relative to the locking sleeve 200, the guide rod 110 slides proximally to close the first clamping arm 400. Under the compression of the first clamping arm 400, the second clamping arm 600 closes, and the two leaflets come closer to each other, thereby reducing mitral regurgitation.

[0093] In step 500, the elastic body 510 of the locking member 500 can remain in a deformed state until the two leaflets come together to a suitable position, at which point the traction wire 700 is released so that the second locking part 520 engages with the first locking part 111, locking the first clamping arm 400.

[0094] Obviously, the above embodiments of the present invention are merely examples for clearly illustrating the present invention, and are not intended to limit the implementation of the present invention. Those skilled in the art will be able to make various obvious changes, readjustments, and substitutions without departing from the scope of protection of the present invention. It is neither necessary nor possible to exhaustively describe all embodiments here. Any modifications, equivalent substitutions, and improvements made within the spirit and principles of the present invention should be included within the scope of protection of the claims of the present invention.

Claims

1. A valve clamp, characterized in that, include: The transmission component (100) includes a guide rod (110) and a hinge seat (120) disposed at the distal end of the guide rod (110). The guide rod (110) extends along a first direction and is provided with a first snap-fit ​​portion (111) along a second direction. A locking sleeve (200) is slidably fitted onto the guide rod (110); A connecting arm (300), the first end of which is hinged to the hinge seat (120); The first clamping arm (400) is provided with a first hinge portion and a second hinge portion. The first hinge portion is hinged to the locking sleeve (200), and the second hinge portion is hinged to the second end of the connecting arm (300). A locking member (500) is disposed on the locking sleeve (200) and located on the side of the guide rod (110) where the first engaging portion (111) is provided along the second direction. The locking member (500) includes an elastic body (510) and a second engaging portion (520) disposed on the elastic body (510); wherein, In the second direction, the elastic body (510) has a natural state and a deformed state; In its natural state, the first latching part (111) latches with the second latching part (520); In the deformed state, the first snap-fit ​​portion (111) separates from the second snap-fit ​​portion (520).

2. The valve clamp according to claim 1, characterized in that, The elastic body (510) includes a first fan ring (511) and a second fan ring (512) disposed opposite to each other along a first direction. A second snap-fit ​​portion (520) is formed between the first end of the first fan ring (511) and the first end of the second fan ring (512). The first fan ring (511) is connected to the locking sleeve (200), and the second fan ring (512) can be connected to the traction wire (700).

3. The valve clamp according to claim 2, characterized in that, An opening (501) is provided between the second end of the first fan ring (511) and the second end of the second fan ring (512).

4. The valve clamp according to claim 2, characterized in that, The elastic body (510) also includes a positioning part (530), the second end of the first fan ring (511) extends inward to form the positioning part (530), and the positioning part (530) is connected to the locking sleeve (200).

5. The valve clamp according to claim 4, characterized in that, The center of the positioning part (530) is arranged to coincide with the center of the elastic body (510).

6. The valve clamp according to claim 4, characterized in that, One of the positioning part (530) and the locking sleeve (200) is provided with a positioning hole (201), and the other is provided with a positioning shaft (531), which is inserted into the positioning hole (201).

7. The valve clamp according to claim 4, characterized in that, The second sector ring (512) is provided with a traction part (540), and the traction part (540) is provided with a through hole (541) along a third direction. The line connecting the center of the through hole (541) and the center of the positioning part (530) is parallel to the first direction, and the traction wire (700) passes through the through hole (541).

8. The valve clamp according to claim 7, characterized in that, The second end of the second fan ring (512) protrudes from the traction part (540) along the circumference of the elastic body (510).

9. The valve clamp according to claim 2, characterized in that, The second sector ring (512) is provided with a traction part (540), the traction part (540) is provided with a through hole (541) along a third direction, and the traction wire (700) passes through the through hole (541); The locking sleeve (200) is provided with a limiting protrusion (210). In the deformed state, the traction part (540) and the limiting protrusion (210) abut against each other in a first direction.

10. The valve clamp according to claim 1, characterized in that, The first latching part (111) is groove-shaped and includes two first limiting surfaces (1111) set at an angle; the second latching part (520) is protruding and includes two second limiting surfaces (521) set at an angle; in the natural state, the first limiting surface (1111) and the second limiting surface (521) are in one-to-one correspondence and fit together.

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