Catheter control mechanism

Abstract

The utility model relates to the technical field of medical instruments, and discloses a catheter control mechanism which comprises a shell, a center rod, a stop piece, a control assembly and a guide wire. The tail end of the shell is provided with a jack; the center rod comprises a rod body inserted into the insertion hole and a rod head located outside the shell, a plurality of key teeth are arranged on the outer wall of the rod body, the key teeth extend from the tail end of the rod body to the head end of the rod body, and the key teeth are distributed around the axis of the rod body in an annular array mode; the stop piece is connected with the shell and is configured to limit one-way rotation of the center rod together with the key teeth; the control assembly is arranged in the shell and detachably connected with the rod body. The guide wire is inserted into the shell from the head end of the shell and connected with the center rod. The center rod is limited to prevent the position of the guide wire from deviating in the transportation process, so that the accuracy of handle control during an operation is improved, and the risk of operation failure is reduced.

Description

Technical Field

[0001] The utility model relates to the technical field of medical equipment, in particular to a catheter control mechanism. Background Art

[0002] The heart repeatedly contracts and relaxes to make blood flow. During the heart's contraction period, the blood in the heart moves to the blood vessels; in the right ventricle, the blood moves to the pulmonary artery; in the left ventricle, the blood moves to the aorta. However, if the valve does not work properly, blood that should flow to the blood vessels will flow back to the atrium during the heart's contraction.

[0003] The US patent with publication number US20040049207A1 discloses a fixation device and method for joining tissues. It uses minimally invasive or intravascular interventional surgery to achieve breakthrough clamping and fixation of the heart valve, thereby solving the regurgitation problem in the valve area. For a long time afterwards, this solution achieved rapid development due to its technical advantages. At present, the use of valve clamping to treat regurgitation has become one of the mainstream means of treating heart valve regurgitation. During the operation, a handle is usually used to control the opening and closing of the first and second clamp arms of the valve clamp to achieve clamping and fixation of the heart valve and solve the regurgitation problem in the valve area.

[0004] In the surgery for treating heart valve regurgitation, the positioning requirements for interventional medical devices are very high, among which the positioning of the guidewire is particularly critical. The current devices lack protection for the handle or only rely on the extrusion of soft plastics such as silicone to softly limit the guidewire, which can easily cause the guidewire position to shift during transportation and use, causing irreversible effects on the device and reducing the success rate of the surgery. Utility Model Content

[0005] The utility model provides a catheter control mechanism to solve the deficiencies of the prior art.

[0006] In order to achieve the above purpose, the utility model provides the following technical solutions:

[0007] A catheter control mechanism comprises a shell, a center rod, a stopper, a control assembly and a guide wire; a plug hole is provided at the rear end of the shell; the center rod comprises a rod body inserted into the plug hole and a rod head located outside the shell, a plurality of key teeth are provided on the outer wall of the rod body, the key teeth extend from the rear end of the rod body to the head end of the rod body, and the plurality of key teeth are distributed in a ring array around the axis of the rod body; the stopper is connected to the shell and is configured to limit the unidirectional rotation of the center rod together with the key teeth; the control assembly is arranged in the shell and is detachably connected to the rod body; the guide wire is inserted into the shell from the head end of the shell and connected to the center rod.

[0008] The utility model limits the central rod by setting a stopper so that the central rod can only rotate in one direction, completely avoiding the central rod from rotating in one direction during transportation or use, and the stopper increases the resistance of the central rod rotating in another direction to a certain extent, which can prevent the central rod from rotating in another direction during transportation to a certain extent. The utility model prevents the position of the guide wire from shifting during transportation by limiting the central rod, thereby improving the accuracy of the handle control during surgery and reducing the risk of surgical failure.

[0009] In some embodiments, the tooth top of the key tooth is provided with a tip and a chamfered portion, the stop member includes a connecting seat and a stop block, the connecting seat is connected to the outer shell, the stop block is located between two adjacent key teeth and is elastically connected to the connecting seat; when the center rod rotates clockwise, the chamfered portion can drive the stop block to move outward along the radial direction of the socket; the tip is blocked by the stop block to prevent the center rod from rotating counterclockwise.

[0010] The stopper structure provided in this embodiment has the advantages of simple structure and low manufacturing cost. It can well realize the unidirectional rotation of the center rod and has a stable and reliable structure.

[0011] In some embodiments, the tooth profile of the key tooth includes a straight line segment, an arc segment and a curved line segment connected in sequence, and the extension line of the straight line segment is coplanar with the axis of the center rod; on the key tooth, the part where the straight line segment and the arc segment are connected constitutes a tip, and the arc segment constitutes a chamfered portion.

[0012] In this embodiment, the chamfered portion on the key tooth is designed to be rounded. During use, the chamfered portion of this shape can smoothly squeeze the stop block toward the outside, making it smoother to use and helping to improve the user experience.

[0013] In some embodiments, the center angle of the arc segment does not exceed 90 degrees, and the center of the arc segment is located on the straight line segment.

[0014] In this embodiment, the shape of the key teeth is further optimized, which not only helps to reduce the difficulty of processing, but also improves the structural strength of the key teeth.

[0015] In some embodiments, one end of the stop block adjacent to the center rod is spherical.

[0016] In this embodiment, the end of the stop block adjacent to the center rod is designed to be a spherical surface, so that the stop block can better cooperate with the chamfered portion on the key tooth, further improving the smoothness of the center rod during rotation.

[0017] In some embodiments, the rod body includes a spherical portion, a first section, and a second section connected in sequence, the diameter of the spherical portion is larger than the diameter of the first section, the root of the key tooth is fixedly connected to the outer wall of the second section, the distance between the tooth top of the key tooth and the axis of the center rod is smaller than the radius of the socket, and the control assembly is detachably connected to the spherical portion.

[0018] In this embodiment, the spherical part and the control component are detachably connected, which helps to reduce the difficulty of connecting the control component and the spherical part.

[0019] In some embodiments, a first threading hole penetrating the spherical body is provided on the central rod, and a glue injection hole communicating with the first threading hole is provided on the spherical body.

[0020] In this embodiment, the guide wire is inserted into the first threading hole, and then medical glue is injected into the glue injection hole to fix the guide wire and the ball part. The guide wire can be connected to the center rod more conveniently, which helps to reduce the difficulty of assembly.

[0021] In some embodiments, the first threading hole passes through the first section and at least passes through a portion of the second section, and a glue injection hole communicating with the first threading hole is provided on the second section.

[0022] In this embodiment, a better fixing effect can be achieved by injecting medical glue into the glue injection holes on the spherical part and the second section at the same time.

[0023] In some embodiments, the control component includes a clamp shell, a drive block, a limit column, a first elastic member, a first clamp and a second clamp; the clamp shell is provided with a receiving groove and a mounting hole, and the receiving groove runs through the tail end of the clamp shell; the drive block is arranged in the receiving groove and has a locking position and an unlocking position, and the drive block is provided with a slide groove, and the slide groove includes a first groove, a second groove, a third groove and a fourth groove, the extension direction of the first groove is parallel to the axis of the center rod, the third groove is located on the side of the first groove adjacent to the center rod, the tail end of the first groove is connected to the two ends of the third groove through the second groove and the fourth groove respectively, and the middle part of the third groove is bent toward the first groove; the limit column includes a plug-in section, a bridging section and a swing section connected in sequence, and the plug-in section is connected to the bridging section and the swing section. The connecting section is perpendicular to the axis of the center rod and is inserted into the mounting hole, the bridging section is located on the outside of the clamp shell and the driving block, the swinging section is inserted into the sliding groove and can slide in the first groove, the second groove, the third groove and the fourth groove; the first elastic member is arranged between the driving block and the clamp shell, and the first elastic member presses the driving block to move toward the tail end of the shell; the first clamp and the second clamp are both rotatably connected to the tail end of the driving block; when the driving block is in the locked position, the swinging section is located in the third groove, and the ball part is stuck between the first clamp and the second clamp; when the driving block is in the unlocked position, the swinging section is located at the head end of the first groove, the first clamp and the second clamp are opened to each other, and the ball part can be released from between the first clamp and the second clamp.

[0024] The control assembly provided in this embodiment has the advantages of stable structure, low manufacturing cost and convenient operation. Moreover, the ball part can be reinstalled after being removed from the first clamp and the second clamp, so that the valve clip can be repeatedly recovered.

[0025] In some embodiments, the tail end of the driving block is provided with a first column and a second column parallel to each other, the first column is perpendicular to the center rod, the head end of the first clamp is sleeved on the first column, and the head end of the second clamp is sleeved on the second column, and the control component also includes a first torsion spring sleeved on the first column and a second torsion spring sleeved on the second column, and the first torsion spring and the second torsion spring respectively drive the tail end of the first clamp and the tail end of the second clamp to rotate in a direction away from the center rod.

[0026] In this embodiment, the first clamp and the second clamp are respectively installed on the driving block through the first column and the second column, so that the installation of the first clamp and the second clamp becomes very simple and convenient, and the stable swing of the first clamp and the second clamp can be ensured.

[0027] In some embodiments, a first ridge fixedly connected to the first clamp is provided between the first clamp and the clamp shell, and a second ridge fixedly connected to the second clamp is provided between the second clamp and the clamp shell, and the length direction of the first ridge and the second ridge is consistent with the axial direction of the center rod; the tail end of the clamp shell is provided with a first release groove and a second release groove respectively located on both sides of the accommodating groove, and the first release groove and the second release groove are both connected to the accommodating groove; along the axial direction of the center rod, the length of the first release groove and the second release groove is less than the length of the accommodating groove; when the drive block is in the unlocked position, the first ridge enters the first release groove, and the second ridge enters the second release groove.

[0028] In this embodiment, the first convex ridge and the second convex ridge are matched with the first release groove and the second release groove respectively, so as to effectively prevent the position of the driving block from being deviated.

[0029] In some embodiments, a first lumen is provided at the head end of the shell, a second threading hole is provided on the driving block, a third threading hole is provided on the clamping shell, and a fourth threading hole is provided on the shell and located between the first lumen and the clamping shell. The fourth threading hole is connected to the first lumen, and the guide wire is sequentially inserted into the first lumen, the fourth threading hole, the third threading hole, and the second threading hole and connected to the center rod.

[0030] This embodiment is helpful to reduce the difficulty of threading the guide wire, thereby helping to improve the assembly efficiency of the product.

[0031] In some embodiments, the shell is provided with a second cavity, a third cavity and a fourth cavity which are connected in sequence and arranged in a straight line, the second cavity is connected with the jack, the fourth cavity is cylindrical, a plurality of wall protrusions are provided in the fourth cavity, the wall protrusions are adjacent to the tail end of the fourth cavity and are fixedly connected to the shell, the wall protrusions include a first wall edge, a connector and a second wall edge which are connected to each other, a first wall groove is defined by the first wall edge, the connector and the second wall edge, a second wall groove is defined between adjacent wall protrusions, a first inclined surface is provided at the head end of the first wall edge and the connector, and a second inclined surface is provided at the head end of the second wall edge. The inclined plane; along the axis direction of the fourth cavity, the lengths of the first wall edge and the second wall edge are equal; the control assembly includes a ball clamp, a rotating shaft, a driving shaft and a second elastic member; the ball clamp includes a connecting portion, a first elastic portion, a second elastic portion, a first ball shell and a second ball shell, the head ends of the first elastic portion and the second elastic portion are connected to the connecting portion and are parallel to each other, the first ball shell is connected to the tail end of the first elastic portion, the second ball shell is connected to the tail end of the second elastic portion, and a ball bin suitable for accommodating the ball portion is formed between the first ball shell and the second ball shell; the connecting portion is connected to the tail end of the rotating shaft, A plurality of bosses are arranged on the outer wall of the head end of the rotating shaft, and the plurality of bosses are equidistantly distributed around the axis of the rotating shaft, and a first tooth is arranged at the head end of the rotating shaft; a movable cavity is arranged on the rotating shaft that runs through both ends thereof, and an inner flange extending inward is arranged on the inner wall of the head end of the movable cavity; the rotating shaft is arranged in the fourth cavity, and the boss is located in the first wall groove, and the boss can slide in the first wall groove; a second tooth meshing with the first tooth is arranged at the tail end of the driving shaft, and a plurality of ribs are arranged on the outer wall of the driving shaft, and the number of the ribs does not exceed the number of the second wall grooves, and a third tooth is arranged at the tail end of the rib Inclined surface; the driving shaft is arranged in the fourth cavity and is adjacent to the tail end of the shell relative to the rotating axis; the tail end of the driving shaft is also provided with an extension portion extending toward the tail end of the shell, and the tail end of the extension portion is provided with an outer flange extending outward, and the extension portion and the outer flange are inserted into the rotating shaft shown; the second elastic member is located in the fourth cavity; when the third inclined surface is in contact with the first inclined surface, the second elastic member pushes the tail end of the rib to slide along the first inclined surface to the head end of the connector; when the third inclined surface is in contact with the second inclined surface, the second elastic member pushes the tail end of the rib to slide along the second inclined surface to the second wall groove.

[0032] The control assembly provided in this embodiment has the advantages of stable structure, low manufacturing cost and convenient operation. Moreover, the ball part can be reinstalled after being removed from the first ball shell and the second ball shell, so that the valve clip can be repeatedly recovered.

[0033] In some embodiments, the control component also includes a fixed seat located in the fourth cavity, the fixed seat is provided with a positioning column extending toward the tail end of the shell, the second elastic member is sleeved on the positioning column, one end of the second elastic member contacts the fixed seat, and the other end of the second elastic member contacts the driving shaft.

[0034] In this embodiment, by sleeve one end of the second elastic member on the positioning column, it is possible to ensure that the second elastic member has strong stability and prevent the position of the second elastic member from being shifted.

[0035] In some embodiments, the head end of the spherical part is provided with a third section extending toward the head end of the shell, the third section is provided with a fifth threading hole connected to the first threading hole, a guide hole is provided between the first elastic part and the second elastic part, and the third section is inserted into the guide hole.

[0036] This embodiment can reduce the shaking of the center rod head end through the cooperation of the third section and the guide hole, and when the ball part moves toward between the first ball shell and the second ball shell, the third section plays a guiding role, allowing the ball part to enter between the first ball shell and the second ball shell more easily.

[0037] In some embodiments, a first cavity is provided at the head end of the shell, and a sixth threading hole is provided on the shell between the first cavity and the fixed seat. The guide wire passes through the first cavity, the sixth threading hole, the fixed seat, the positioning column, the driving shaft, the rotating shaft, the ball clamp and the center rod in sequence.

[0038] The guide wire in this embodiment is in a straight state and has fewer bends, which helps to reduce the difficulty of controlling the guide wire.

[0039] In some embodiments, the catheter control mechanism also includes a sleeve, which includes a first tube and a second tube connected to each other; a slideway parallel to the center rod and connected to the first cavity is provided in the outer shell, the first tube is inserted into the slideway and can slide in the slideway, and the second tube extends outside the outer shell.

[0040] When in use, the pull rope can be passed through the first cavity and connected to the sleeve. The pull rope can be pulled by sliding the first tube of the sleeve in the slideway, thereby achieving control of the valve clip.

[0041] In some embodiments, the shell is composed of a left half and a right half, and a sealing groove is provided on the left half and the right half. The sealing groove is located outside the seam of the first cavity, and a sealing gasket is provided in the sealing groove.

[0042] In this embodiment, a sealing gasket is arranged on the periphery of the first cavity, so that good sealing between the left half and the right half can be ensured to prevent liquid from leaking from the gap between the left half and the right half.

[0043] In some embodiments, the slide includes a fixed section and a sliding section that are interconnected, the first tube is inserted into the sliding section and can slide in the sliding section, a core tube is provided in the fixed section, one end of the core tube is inserted into the first tube, and the sealing gasket is provided with a first annular portion surrounding the outside of the core tube.

[0044] The core tube provided in this embodiment has a smoother inner wall, which can effectively prevent the pull rope from being worn, and the first annular portion surrounding the outer periphery of the core tube can prevent liquid from leaking from the gap between the core tube and the outer shell.

[0045] In some embodiments, the catheter control mechanism also includes a wire tube arranged in the first cavity, the wire tube is provided with a central hole and side holes located around the central hole, the central hole and the side holes both pass through the head end and the tail end of the wire tube, and the number of the side holes is equal to the number of the sleeve; the sealing gasket is provided with a second annular portion surrounding the wire tube.

[0046] In this embodiment, the guide wire and the pull rope are separated by the wire tube, which can effectively prevent the guide wire and the pull rope from being entangled with each other. The second annular portion is helpful to improve the sealing performance between the wire tube and the shell. BRIEF DESCRIPTION OF THE DRAWINGS

[0047] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on these drawings without paying creative work.

[0048] Figure 1a It is a stereogram of embodiment 1 of the utility model.

[0049] Figure 1b It is another stereogram of embodiment 1 of the utility model.

[0050] Figure 2 yes Figure 1b A schematic diagram showing the left half of the housing hidden.

[0051] Figure 3 It is a schematic diagram of the connection between the center rod and the control assembly in Example 1 of the utility model.

[0052] Figure 4a It is a front view of the center rod in Example 1 of the utility model.

[0053] Figure 4b yes Figure 4a Sectional view along line AA.

[0054] Figure 4c yes Figure 4a Sectional view along line BB.

[0055] Figure 4d yes Figure 4c A partial enlarged view of point Ⅰ in the middle.

[0056] Figure 5aIt is a three-dimensional diagram of the clamping shell in Example 1 of the utility model.

[0057] Figure 5b yes Figure 5a Left side view of the middle shell.

[0058] Figure 6a It is a three-dimensional diagram of the driving block in Example 1 of the utility model.

[0059] Figure 6b This is a front view of the driving block in Example 1 of the utility model.

[0060] Figure 6c It is a left view of the driving block in Example 1 of the utility model.

[0061] Figure 6d It is a right side view of the driving block in Example 1 of the utility model.

[0062] Figure 6e It is a top view of the driving block in Example 1 of the utility model.

[0063] Figure 6f It is a bottom view of the driving block in Example 1 of the utility model.

[0064] Figure 6g yes Figure 6b Cross-sectional view along line CC.

[0065] Figure 7a It is a three-dimensional diagram of the first clamp in Example 1 of the utility model.

[0066] Figure 7b It is another stereoscopic view of the first clamp in Example 1 of the utility model.

[0067] Figure 8 It is a three-dimensional diagram of the limiting column in Example 1 of the utility model.

[0068] Fig. 9 A three-dimensional diagram of the first clamp, the second clamp and the driving block assembled together in Example 1 of the utility model.

[0069] Fig.10a It is a stereoscopic diagram of the line tube in Example 1 of the utility model.

[0070] Fig.10b It is a cross-sectional view of the line tube in Example 1 of the utility model.

[0071] Fig.11 It is an assembly diagram of the center rod, the stopper and the outer shell in the utility model.

[0072] Fig.12 It is a structural schematic diagram of the stop block of the utility model.

[0073] Fig.13 It is a schematic diagram of Embodiment 2 of the present utility model, in which the right half of the housing is hidden.

[0074] Fig.14 It is a structural diagram of the center rod in Example 2 of the utility model.

[0075] Fig.15 It is a structural diagram of the control component in Example 2 of the utility model.

[0076] Fig.16 It is a structural diagram of the ball clamp in Example 2 of the utility model.

[0077] Fig.17a It is a structural diagram of the rotating shaft in Example 2 of the utility model.

[0078] Fig.17b It is a cross-sectional view of the rotating shaft in Example 2 of the present utility model.

[0079] Fig.18a It is a stereoscopic diagram of the driving shaft in Example 2 of the utility model.

[0080] Fig.18b It is a front view of the driving shaft in Example 2 of the utility model.

[0081] Fig.18c yes Fig.18b Cross-sectional view along line DD.

[0082] Fig.19 It is a three-dimensional diagram of the fixing seat in Embodiment 2 of the present utility model.

[0083] Fig.20a It is a structural diagram of the left half of the housing in Example 2 of the utility model.

[0084] Fig.20b yes Fig.20a A partial enlarged view of point II in the middle.

[0085] Fig.20c yes Fig.20a A partial enlarged view of point III in the middle.

[0086] Fig.21 It is a structural diagram of the sealing gasket in Example 2 of the utility model.

[0087] Fig. 22 yes Fig.13 Schematic diagram after adding sealing gasket, core tube and wire tube.

[0088] The following are the descriptions of the reference numerals:

[0089] In the figure: 1, shell; 101, left half; 102, right half; 103, jack; 104, first cavity; 105, fourth threading hole; 106, second cavity; 107, third cavity; 108, fourth cavity; 109, sixth threading hole; 1010, slideway; 10101, fixed section; 10102, sliding section; 1011, sealing groove; 2, center rod; 201, rod head; 202, rod body; 2021, first section; 2022, second section; 2023, ball part; 2024, third section; 203, first threading hole; 204, glue injection hole; 3, key teeth; 301, tip; 302, chamfered part; 3 03, straight line segment; 304, arc segment; 305, curve segment; 4, guide wire; 5, connecting seat; 6, stop block; 7, first compression spring; 8, clamp shell; 801, receiving groove; 802, mounting hole; 803, first release groove; 804, second release groove; 805, third threading hole; 9, drive block; 901, slide groove; 9011, first groove; 9012, second groove; 9013, third groove; 9014, fourth groove; 902, first column; 903, second column; 904, second threading hole; 905, spring hole; 10, limit column; 1001, plug-in section; 1002, bridge section; 1003, swing section; 11, First clamp; 1101, first convex edge; 12, second clamp; 1201, second convex edge; 13, first torsion spring; 14, second torsion spring; 15, wall convex; 1501, first wall ridge; 1502, connector; 1503, second wall ridge; 1504, first inclined surface; 1505, second inclined surface; 16, first wall groove; 17, second wall groove; 18, ball clamp; 1801, connecting part; 1802, first elastic part; 1803, second elastic part; 1804, first ball shell; 1805, second ball shell; 1806, ball chamber; 1807, guide hole; 19, rotating shaft; 1901, boss; 1902, first tooth; 1 903, movable cavity; 1904, inner flange; 20, driving shaft; 2001, second tooth; 2002, rib; 20021, third inclined surface; 2003, extension portion; 2004, outer flange; 2005, countersunk hole; 21, second elastic member; 22, fixing seat; 2201, positioning column; 23, sleeve; 2301, first tube; 2302, second tube; 24, wire tube; 2401, center hole; 2402, side hole; 25, injection tube; 2501, injection channel; 26, sealing gasket; 2601, first annular portion; 2602, second annular portion; 27, core tube; 100, stopper; 200, control assembly. DETAILED DESCRIPTION

[0090] The following is a further detailed description of the implementation methods of the present application in conjunction with the accompanying drawings and examples. The detailed descriptions of the following examples and the accompanying drawings are used to exemplarily illustrate the principles of the present application, but cannot be used to limit the scope of the present application. The present application can be implemented in many different forms and is not limited to the specific embodiments disclosed herein, but includes all technical solutions that fall within the scope of the claims.

[0091] The present application provides these embodiments to make the present application thorough and complete, and to fully express the scope of the present application to those skilled in the art. It should be noted that unless otherwise specifically stated, the relative arrangement of the parts and steps, the composition of the materials, the numerical expressions and the numerical values ​​set forth in these embodiments should be interpreted as being merely exemplary, and not as limiting.

[0092] It should be noted that, in the description of this application, unless otherwise specified, the meaning of "multiple" is greater than or equal to two; the terms "upper", "lower", "left", "right", "inner", "outer", etc., indicating the orientation or positional relationship, are only for the convenience of describing this application and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, be constructed and operated in a specific orientation, and therefore cannot be understood as a limitation on this application. When the absolute position of the object being described changes, the relative positional relationship may also change accordingly.

[0093] In addition, the words "first", "second" and similar words used in this application do not indicate any order, quantity or importance, but are only used to distinguish different parts. "Vertical" does not mean vertical in the strict sense, but is within the tolerance range. "Parallel" does not mean parallel in the strict sense, but is within the tolerance range. "Include" or "comprising" and similar words mean that the elements before the word include the elements listed after the word, and do not exclude the possibility of including other elements.

[0094] It should also be noted that in the description of this application, unless otherwise clearly specified and limited, the terms "installed", "connected", and "connected" should be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or an integral connection; it can be directly connected or indirectly connected through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to the specific circumstances. When a specific device is described as being located between a first device and a second device, there may or may not be an intermediate device between the specific device and the first device or the second device.

[0095] All terms used in this application have the same meaning as those understood by those of ordinary skill in the art to which this application belongs, unless otherwise specifically defined. It should also be understood that terms defined in general dictionaries, such as general dictionaries, should be interpreted as having a meaning consistent with their meaning in the context of the relevant technology, and should not be interpreted in an idealized or extremely formal sense, unless explicitly defined herein.

[0096] Technologies, methods, and equipment known to ordinary technicians in the relevant art may not be discussed in detail, but where appropriate, the technologies, methods, and equipment should be considered part of the specification.

[0097] The head end described in the utility model is the end of the parts of the catheter control mechanism close to the heart when in use, and the tail end is the end of the parts of the catheter control mechanism far away from the heart when in use.

[0098] Example 1

[0099] See Figure 1- Fig.12 As shown, this embodiment provides a catheter control mechanism, which includes a housing 1, a center rod 2, a stopper 100, a control assembly 200 and a guide wire 4. In order to facilitate the user to hold the housing 1, the shape of the housing 1 can be designed to be cylindrical, and a plug hole 103 is provided at the rear end of the housing 1, and the axis of the plug hole 103 coincides with the axis of the housing 1. The center rod 2 includes a shaft 202 inserted into the plug hole 103 and a rod head 201 located outside the housing 1, and the shaft 202 is fixedly connected to the rod head 201, and the rod head 201 has a larger diameter for easy hand-held rotation. A plurality of key teeth 3 are provided on the outer wall of the shaft 202, and the key teeth 3 extend from the rear end of the shaft 202 to the head end of the shaft 202, and the plurality of key teeth 3 are distributed in a circular array around the axis of the shaft 202, and the distribution form of the key teeth around the shaft 202 is similar to the structure of the spline. The stopper 100 is connected to the housing 1 and is configured to limit the unidirectional rotation of the center rod 2 together with the key teeth 3. In this embodiment, the stopper 100 allows the center rod 2 to rotate clockwise, and the stopper 100 prevents the center rod 2 from rotating counterclockwise. The control assembly 200 is arranged in the housing 1 and is detachably connected to the shaft 202. After the shaft 202 and the control assembly 200 are separated, the center rod 2 can be pulled out of the jack 103 to a certain length. The guide wire 4 can be a rigid cable such as a steel cable. The guide wire 4 is inserted into the housing 1 from the head end of the housing 1 and is fixedly connected to the center rod 2. When the rod head 201 is rotated, the guide wire 4 rotates synchronously with the center rod 2.

[0100] The stopper 100 provided in the utility model limits the center rod 2 so that the center rod 2 can only rotate in one direction, completely preventing the center rod 2 from rotating counterclockwise during transportation or use, and the stopper 100 increases the resistance of the center rod 2 to rotate clockwise to a certain extent, which can prevent the center rod 2 from rotating clockwise during transportation to a certain extent. The utility model prevents the position of the guide wire 4 from shifting during transportation by limiting the center rod 2, thereby improving the accuracy of the handle control during surgery and reducing the risk of surgical failure.

[0101] In this embodiment, the tooth top of the key tooth 3 is provided with a tip 301 and a chamfered portion 302, and the stopper 100 includes a connecting seat 5 and a stopper block 6, the connecting seat 5 is connected to the housing 1, and the stopper block 6 is located between two adjacent key teeth 3 and elastically connected to the connecting seat 5. Fig.11 As shown, a groove for installing the connecting seat 5 is provided at the tail end of the plug hole 103, and the connecting seat 5 is fixed in the groove. The stopper 6 is connected to the connecting seat 5 through the first compression spring 7, and the first compression spring 7 allows the stopper 6 to extend into the plug hole 103 at a natural length. When the center rod 2 rotates clockwise, the chamfered portion 302 interacts with the stopper 6 to gradually compress the first compression spring 7, thereby driving the stopper 6 to move outward along the radial direction of the plug hole 103. When the center rod 2 has a tendency to rotate counterclockwise, the tip 301 cannot press the stopper 100 to move outward along the radial direction of the plug hole 103, and the tip 301 is blocked by the stopper 6 to prevent the center rod 2 from rotating counterclockwise. The stopper 100 structure provided in this embodiment has the advantages of simple structure and low manufacturing cost, which can well realize the unidirectional rotation of the center rod 2, and the structure is stable and reliable.

[0102] Figure 4d The tooth profile of the key tooth 3 in this embodiment is shown in the figure. The tooth profile of the key tooth 3 includes a straight segment 303, an arc segment 304 and a curved segment 305 connected in sequence. The extension line of the straight segment 303 is coplanar with the axis of the center rod 2. On the key tooth 3, the portion where the straight segment 303 and the arc segment 304 are connected constitutes a tip 301, and the arc segment 304 constitutes a chamfered portion 302. The chamfered portion 302 formed by the arc segment 304 can better squeeze the stopper toward the outside, so that when the center rod 2 rotates clockwise, it is ensured that the key tooth 3 can smoothly pass through the stopper 100. In this embodiment, the chamfered portion 302 on the key tooth 3 is designed to be rounded. During use, the chamfered portion 302 of this shape can smoothly squeeze the stopper 6 toward the outside, making it smoother to use and helping to improve the user experience. In a preferred embodiment, the central angle of the arc segment 304 does not exceed 90 degrees, and the center of the arc segment 304 is located on the straight line segment 303 , that is, the tangent line at one end of the arc segment 304 connecting the straight line segment 303 is perpendicular to the straight line segment 303 .

[0103] In order to make the key tooth 3 cooperate better with the stop block 6 so that the key tooth 3 can pass the stopper 100 more smoothly when the center rod 2 rotates clockwise, in this embodiment, the end of the stop block 6 adjacent to the center rod 2 is designed to be a spherical surface.

[0104] See also Figure 4a As shown, the rod body 202 includes a spherical body 2023, a first section 2021 and a second section 2022 connected in sequence, the diameter of the spherical body 2023 is larger than the diameter of the first section 2021, the tooth root of the key tooth 3 is fixedly connected to the outer wall of the second section 2022, the distance between the tooth top of the key tooth 3 and the axis of the center rod 2 is smaller than the radius of the insertion hole 103, and the control component 200 is detachably connected to the spherical body 2023. The first section 2021 and the second section 2022 are both cylindrical, and the diameter of the second section 2022 is larger than the diameter of the first section 2021, so that the second section 2022 has sufficient structural strength.

[0105] In order to achieve the connection between the guide wire 4 and the central rod 2, a first threading hole 203 penetrating the spherical part 2023 is provided on the central rod 2, and a glue injection hole 204 communicating with the first threading hole 203 is provided on the spherical part 2023. The guide wire 4 is inserted into the first threading hole 203, and then medical glue is injected into the glue injection hole 204 to fix the guide wire 4 with the spherical part 2023. In order to further enhance the fixing effect of the guide wire 4, the first threading hole 203 penetrates the first section 2021 and at least penetrates a part of the second section 2022, and a glue injection hole 204 communicating with the first threading hole 203 is provided on the second section 2022. In the process of connecting the guide wire 4 with the central rod 2, the guide wire 4 can be inserted into the deepest part of the first threading hole 203, and a better fixing effect can be achieved by injecting medical glue into the glue injection holes 204 on the spherical part 2023 and the second section 2022 at the same time.

[0106] In this embodiment, the control assembly 200 includes a clamping shell 8 , a driving block 9 , a limiting column 10 , a first elastic member, a first clamp 11 and a second clamp 12 .

[0107] The clamping shell 8 is provided with a rectangular receiving groove 801 and a cylindrical mounting hole 802 . The receiving groove 801 passes through the rear end of the clamping shell 8 , and the mounting hole 802 is perpendicular to the central rod 2 .

[0108] The driving block 9 is arranged in the accommodating groove 801 and can slide in the accommodating groove 801 so that the driving block 9 has a locked position and an unlocked position. A sliding groove 901 is provided on the driving block 9, and the sliding groove 901 includes a first groove 9011, a second groove 9012, a third groove 9013 and a fourth groove 9014. The extension direction of the first groove 9011 is parallel to the axis of the center rod 2. The third groove 9013 is located on the side of the first groove 9011 adjacent to the center rod 2. The tail end of the first groove 9011 is connected to the two ends of the third groove 9013 through the second groove 9012 and the fourth groove 9014 respectively, and the middle part of the third groove 9013 is bent toward the first groove 9011.

[0109] The limiting column 10 includes a plug-in section 1001, a bridging section 1002 and a swinging section 1003 which are connected in sequence. The plug-in section 1001 is parallel to the swinging section 1003, and the bridging section 1002 is perpendicular to both the plug-in section 1001 and the swinging section 1003. The plug-in section 1001 is perpendicular to the axis of the center rod 2 and is inserted into the mounting hole 802. The plug-in section 1001 and the mounting hole 802 are clearance-matched so that the plug-in section 1001 can rotate in the mounting hole 802. The bridging section 1002 is located on the outside of the clamping shell 8 and the driving block 9. The swinging section 1003 is inserted into the slide groove 901 and can slide in the first groove 9011, the second groove 9012, the third groove 9013 and the fourth groove 9014.

[0110] The first elastic member (not shown in the figure) is arranged between the driving block 9 and the clamping shell 8, and the first elastic member presses the driving block 9 to move toward the rear end of the housing 1. The first clamp 11 and the second clamp 12 are both rotatably connected to the rear end of the driving block 9; when the driving block 9 is in the locked position, the swing section 1003 is located in the third groove 9013, and the ball part 2023 is stuck between the first clamp 11 and the second clamp 12; when the driving block 9 is in the unlocked position, the swing section 1003 is located at the head end of the first groove 9011, the first clamp 11 and the second clamp 12 are opened to each other, and the ball part 2023 can be released from between the first clamp 11 and the second clamp 12.

[0111] In a specific implementation, the first elastic member can be a compression spring, and a spring hole 905 for installing the first elastic member is provided at the head end of the driving block 9, the tail end of the first elastic member is inserted into the spring hole 905, and the head end of the first elastic member is connected to the clamping shell 8. The width of the first groove 9011, the second groove 9012, the third groove 9013 and the fourth groove 9014 needs to be greater than the diameter of the swing section 1003, so that the swing section 1003 can slide smoothly in the slide groove 901.

[0112] In order to realize the rotatable connection between the first clamp 11, the second clamp 12 and the driving block 9, the tail end of the driving block 9 is provided with a first column 902 and a second column 903 which are parallel to each other, the first column 902 is perpendicular to the central rod 2, the head end of the first clamp 11 is sleeved on the first column 902, the head end of the second clamp 12 is sleeved on the second column 903, and the tail end of the first clamp 11 and the tail end of the second clamp 12 can respectively rotate around the first column 902 and the second column 903. The control component 200 also includes a first torsion spring 13 sleeved on the first column 902 and a second torsion spring 14 sleeved on the second column 903, the first torsion spring 13 and the second torsion spring 14 respectively drive the tail end of the first clamp 11 and the tail end of the second clamp 12 to rotate in a direction away from the central rod 2. When the driving block 9 is located in the locking position, the clamp shell 8 prevents the first clamp 11 and the second clamp 12 from separating; when the driving block 9 is located in the unlocking position, the first clamp 11 and the second clamp 12 are no longer restricted by the clamp shell 8, and the first torsion spring 13 and the second torsion spring 14 make the first clamp 11 and the second clamp 12 open to each other.

[0113] In this embodiment, a first convex ridge 1101 fixedly connected to the first clamp 11 is provided between the first clamp 11 and the clamp shell 8, and a second convex ridge 1201 fixedly connected to the second clamp 12 is provided between the second clamp 12 and the clamp shell 8. The length direction of the first convex ridge 1101 and the second convex ridge 1201 is consistent with the axial direction of the center rod 2. The tail end of the clamp shell 8 is provided with a first release groove 803 and a second release groove 804 respectively located on both sides of the receiving groove 801. The first release groove 803 and the second release groove 804 are both connected to the receiving groove 801. Along the axial direction of the center rod 2, the length of the first release groove 803 and the second release groove 804 is less than the length of the receiving groove 801. When the driving block 9 is in the unlocking position, the first convex ridge 1101 enters the first release groove 803, and the second convex ridge 1201 enters the second release groove 804. By making the convex ridges and the release grooves cooperate with each other, the position deviation of the driving block 9 can be effectively prevented.

[0114] In this embodiment, the head end of the housing 1 is provided with a first lumen 104, the driving block 9 is provided with a second threading hole 904, the clamping shell 8 is provided with a third threading hole 805, the housing 1 is provided with a fourth threading hole 105 located between the first lumen 104 and the clamping shell 8, the fourth threading hole 105 is communicated with the first lumen 104, the guide wire 4 sequentially penetrates the first lumen 104, the fourth threading hole 105, the third threading hole 805, the second threading hole 904 and is connected to the center rod 2. In order to facilitate the insertion of the guide wire 4, the fourth threading hole 105, the third threading hole 805, the second threading hole 904, and the first threading hole 203 are located in a straight line.

[0115] In this embodiment, the catheter control mechanism further includes a sleeve 23, which includes a first tube 2301 and a second tube 2302 connected to each other; a slideway 1010 is provided in the housing 1, which is parallel to the central rod 2 and connected to the first lumen 104, the first tube 2301 is inserted into the slideway 1010 and can slide in the slideway 1010, and the second tube 2302 extends out of the housing 1. When in use, the pull rope used to control the valve clip can be inserted from the first lumen 104 and connected to the sleeve 23, and the pull rope can be pulled by sliding the first tube 2301 of the sleeve 23 in the slideway 1010, thereby controlling the valve clip. The number of sleeves 23 can be one, two or more, the number of slideways 1010 is equal to the number of sleeves 23, and the number of sleeves 23 should correspond to the number of pull ropes in the catheter.

[0116] In this embodiment, the catheter control mechanism further includes a wire tube 24 disposed in the first lumen 104, the wire tube 24 is provided with a central hole 2401 and side holes 2402 located around the central hole 2401, the central hole 2401 and the side holes 2402 both penetrate the head end and the tail end of the wire tube 24, and the number of the side holes 2402 is equal to the number of the sleeve 23. When in use, the guide wire 4 passes through the central hole 2401, and the pull rope passes through the side hole 2402. The guide wire 4 and the pull rope are separated by the wire tube 24, which can effectively prevent the guide wire 4 and the pull rope from being entangled with each other.

[0117] In this embodiment, the housing 1 is provided with an injection tube 25, and the injection tube 25 is provided with an injection channel 2501 connected to the first cavity 104. A syringe or a syringe pump can be used to connect the injection tube 25, and physiological saline / heparin saline can be injected into the first cavity 104 to flush the delivery catheter and the valve clip, and then the valve clip and the delivery catheter are sent into the bending sheath along the loader. It should be noted that the tail end of the sleeve 23 and the gap between the sleeve 23 and the housing 1 need to have good sealing performance to prevent leakage of physiological saline / heparin saline.

[0118] See also Figure 1a , Figure 1b and Figure 2 As shown, the housing 1 in this embodiment can be assembled by a left half 101 and a right half 102, and a plurality of buckle structures are arranged on the joint surfaces of the left half 101 and the right half 102, and the left half 101 and the right half 102 are assembled together by the aforementioned buckle structures. When the left half 101 and the right half 102 are assembled, the sealing between the two needs to be ensured to prevent liquid from leaking from the gap between the left half 101 and the right half 102.

[0119] The working principle of this embodiment is as follows:

[0120] Before use, the driving block 9 is located in the locking position, the spherical portion 2023 on the center rod 2 is clamped between the first clamp 11 and the second clamp 12, the swing section 1003 of the limiting column 10 is located in the third groove 9013 and is retained in the third groove 9013 under the action of the first elastic member, the center rod 2 cannot be pulled out, and the stop block 6 allows the center rod 2 to rotate only in one direction.

[0121] During use, the center rod 2 is pushed toward the head end of the housing 1 for a short distance and then released. During this process, the ball portion 2023 on the center rod 2 pushes the drive block 9 to move toward the head end of the housing 1, and the swing section 1003 of the limit column 10 slides from the third groove 9013 to the fourth groove 9014. Then, under the elastic force of the first elastic member, the drive block 9 moves toward the tail end of the housing 1, and the swing section 1003 of the limit column 10 slides from the fourth groove 9014 to the first groove 9011; when the limit column 1 When the swing section 1003 of 0 slides to the head end of the first groove 9011, the driving block 9 is in the unlocking position. At this time, under the action of the first torsion spring 13 and the second torsion spring 14, the first clamp 11 and the second clamp 12 are opened, and then the rod head 201 of the central rod 2 is pulled to move the ball part 2023 out from between the first clamp 11 and the second clamp 12, and then the guide wire 4 can be pulled by pulling the rod head 201 of the central rod 2, and the guide wire 4 can be controlled to rotate by rotating the rod head 201 clockwise.

[0122] When the driving block 9 is in the unlocking position, the center rod 2 is pushed toward the head end of the shell 1, and the ball part 2023 on the center rod 2 can push the driving block 9 to move toward the tail end of the shell 1. In this process, the first clamp 11 and the second clamp 12 are rotated and closed under the action of the clamp shell 8, and the ball part 2023 is clamped between the first clamp 11 and the second clamp 12 again. The swing section 1003 of the limiting column 10 returns to the third groove 9013 along the first groove 9011 and the second groove 9012. Finally, the driving block 9 can return to the locking position. By returning the driving block 9 to the locking position, the valve clamp can be repeatedly recovered.

[0123] Example 2

[0124] See also Figure 11-Figure 22 As shown, this embodiment provides another catheter control mechanism, which includes a housing 1, a central rod 2, a stopper 100, a control assembly 200 and a guide wire 4.

[0125] In order to facilitate the user to hold the device in hand, the shape of the housing 1 can be designed to be cylindrical. A plug hole 103 is provided at the rear end of the housing 1 , and the axis of the plug hole 103 coincides with the axis of the housing 1 .

[0126] The center rod 2 includes a rod shaft 202 inserted into the insertion hole 103 and a rod head 201 located outside the housing 1. The rod shaft 202 is fixedly connected to the rod head 201. The rod head 201 has a large diameter for easy hand-held rotation. A plurality of key teeth 3 are provided on the outer wall of the rod shaft 202. The key teeth 3 extend from the tail end of the rod shaft 202 to the head end of the rod shaft 202. The plurality of key teeth 3 are distributed in a circular array around the axis of the rod shaft 202. The distribution form of the key teeth around the rod shaft 202 is similar to the structure of a spline.

[0127] The stopper 100 is connected to the housing 1 and is configured to limit the unidirectional rotation of the center rod 2 together with the key teeth 3. In this embodiment, the stopper 100 allows the center rod 2 to rotate clockwise, and the stopper 100 prevents the center rod 2 from rotating counterclockwise.

[0128] The control assembly 200 is disposed in the housing 1 and is detachably connected to the shaft 202. After the shaft 202 and the control assembly 200 are separated, the center rod 2 can be pulled out of the insertion hole 103 to a certain length. The guide wire 4 can be a rigid cable such as a steel cable. The guide wire 4 is inserted into the housing 1 from the head end of the housing 1 and is fixedly connected to the center rod 2. When the rod head 201 is rotated, the guide wire 4 rotates synchronously with the center rod 2.

[0129] In this embodiment, the tooth top of the key tooth 3 is provided with a tip 301 and a chamfered portion 302, and the stopper 100 includes a connecting seat 5 and a stopper block 6, the connecting seat 5 is connected to the housing 1, and the stopper block 6 is located between two adjacent key teeth 3 and elastically connected to the connecting seat 5. Fig.20c As shown, a groove for installing the connection seat 5 is provided at the rear end of the insertion hole 103, and the connection seat 5 is fixed in the groove. The stopper 6 is connected to the connection seat 5 through the first compression spring 7, and the first compression spring 7 makes the stopper 6 extend into the insertion hole 103 at a natural length. When the center rod 2 rotates clockwise, the chamfered portion 302 interacts with the stopper 6 to gradually compress the first compression spring 7, thereby driving the stopper 6 to move outward along the radial direction of the insertion hole 103. When the center rod 2 has a tendency to rotate counterclockwise, the tip 301 cannot press the stopper 100 to move outward along the radial direction of the insertion hole 103, and the tip 301 is blocked by the stopper 6 to prevent the center rod 2 from rotating counterclockwise.

[0130] The tooth profile of the key tooth 3 in this embodiment is the same as that in the embodiment 1, see Figure 4dAs shown, the tooth profile of the key tooth 3 includes a straight segment 303, an arc segment 304 and a curved segment 305 connected in sequence, and the extension line of the straight segment 303 is coplanar with the axis of the center rod 2; on the key tooth 3, the portion where the straight segment 303 and the arc segment 304 are connected constitutes a tip 301, and the arc segment 304 constitutes a chamfered portion 302. The chamfered portion 302 formed by the arc segment 304 can well squeeze the stopper toward the outside, so that when the center rod 2 rotates clockwise, it is ensured that the key tooth 3 can smoothly pass through the stopper 100. In a preferred embodiment, the center angle of the arc segment 304 does not exceed 90 degrees, and the center of the arc segment 304 is located on the straight segment 303, that is, the tangent of one end of the arc segment 304 connected to the straight segment 303 is perpendicular to the straight segment 303.

[0131] In order to make the key tooth 3 cooperate better with the stop block 6 so that the key tooth 3 can pass the stopper 100 more smoothly when the center rod 2 rotates clockwise, in this embodiment, the end of the stop block 6 adjacent to the center rod 2 is designed to be a spherical surface.

[0132] See also Fig.14 As shown, the rod body 202 includes a spherical body 2023, a first section 2021 and a second section 2022 connected in sequence, the diameter of the spherical body 2023 is larger than the diameter of the first section 2021, the tooth root of the key tooth 3 is fixedly connected to the outer wall of the second section 2022, the distance between the tooth top of the key tooth 3 and the axis of the center rod 2 is smaller than the radius of the insertion hole 103, and the control component 200 is detachably connected to the spherical body 2023. The first section 2021 and the second section 2022 are both cylindrical, and the diameter of the second section 2022 is larger than the diameter of the first section 2021, so that the second section 2022 has sufficient structural strength.

[0133] In order to achieve the connection between the guide wire 4 and the central rod 2, a first threading hole 203 penetrating the spherical part 2023 is provided on the central rod 2, and a glue injection hole 204 communicating with the first threading hole 203 is provided on the spherical part 2023. The guide wire 4 is inserted into the first threading hole 203, and then medical glue is injected into the glue injection hole 204 to fix the guide wire 4 with the spherical part 2023. In order to further enhance the fixing effect of the guide wire 4, the first threading hole 203 penetrates the first section 2021 and at least penetrates a part of the second section 2022, and a glue injection hole 204 communicating with the first threading hole 203 is provided on the second section 2022. In the process of connecting the guide wire 4 with the central rod 2, the guide wire 4 can be inserted into the deepest part of the first threading hole 203, and a better fixing effect can be achieved by injecting medical glue into the glue injection holes 204 on the spherical part 2023 and the second section 2022 at the same time.

[0134] In this embodiment, the housing 1 is provided with a second cavity 106, a third cavity 107 and a fourth cavity 108 which are connected in sequence and arranged in a straight line. The second cavity 106 is connected to the insertion hole 103. The fourth cavity 108 is cylindrical. A plurality of wall protrusions 15 are provided in the fourth cavity 108. The wall protrusions 15 are adjacent to the tail end of the fourth cavity 108 and are fixedly connected to the housing 1. The wall protrusions 15 include a first wall edge 1501, a connector 1502 and a second wall edge 1503 which are connected to each other. A first wall groove 16 is defined by the first wall edge 1501, the connector 1502 and the second wall edge 1503. A second wall groove 17 is defined between adjacent wall protrusions 15. The head ends of the first wall edge 1501 and the connector 1502 are provided with a first inclined surface 1504, and the head end of the second wall edge 1503 is provided with a second inclined surface 1505. Along the axial direction of the fourth cavity 108, the lengths of the first wall edge 1501 and the second wall edge 1503 are equal. Fig.20b As shown, the inner wall of the connector 1502 is a cylindrical surface, the inner wall of the connector 1502 is coaxial with the fourth cavity 108 and the diameter of the inner wall of the connector 1502 is smaller than the diameter of the fourth cavity 108, and the inclination angle of the first slope 1504 and the second slope 1505 is approximately 45 degrees.

[0135] The control assembly 200 of the present embodiment includes a ball clamp 18 , a rotating shaft 19 , a driving shaft 20 and a second elastic member 21 .

[0136] See also Fig.16 As shown, the ball clamp 18 includes a connecting portion 1801, a first elastic portion 1802, a second elastic portion 1803, a first ball shell 1804 and a second ball shell 1805. The head ends of the first elastic portion 1802 and the second elastic portion 1803 are fixedly connected to the connecting portion 1801 and are parallel to each other. The first ball shell 1804 and the second ball shell 1805 are both hemispherical, the first ball shell 1804 is connected to the tail end of the first elastic portion 1802, the second ball shell 1805 is connected to the tail end of the second elastic portion 1803, and a spherical ball chamber 1806 suitable for accommodating the ball portion 2023 is formed between the first ball shell 1804 and the second ball shell 1805. The second cavity 106 can be cylindrical, in which case the diameters of the first spherical shell 1804 and the second spherical shell 1805 are slightly smaller than the diameter of the second cavity 106; the second cavity 106 can also be a regular polygon, in which case the diameters of the first spherical shell 1804 and the second spherical shell 1805 are slightly smaller than the diameter of the inscribed circle of the aforementioned polygon, thereby ensuring that the first spherical shell 1804 and the second spherical shell 1805 cannot open when they are in the second cavity 106.

[0137] The ball clamp 18 can be made of metal or plastic. In the natural state or when the ball part 2023 is located in the ball warehouse 1806, the first elastic part 1802 and the second elastic part 1803 are parallel to each other; when the ball part 2023 passes through the tail ends of the first ball shell 1804 and the second ball shell 1805, the ball part 2023 squeezes the first ball shell 1804 and the second ball shell 1805 toward the outside, causing the first elastic part 1802 and the second elastic part 1803 to produce elastic deformation. After the ball part 2023 passes, the first elastic part 1802 and the second elastic part 1803 return to a parallel state.

[0138] The rotating shaft 19 is a hollow cylindrical shape, and an active cavity 1903 is formed inside the rotating shaft 19 and passes through both ends of the rotating shaft 19. An inner flange 1904 extending radially inwardly along the rotating shaft 19 is provided on the inner wall of the head end of the active cavity 1903. The connecting portion 1801 is connected to the tail end of the rotating shaft 19, and a plurality of bosses 1901 are provided on the outer wall of the head end of the rotating shaft 19. The plurality of bosses 1901 are equally spaced around the axis of the rotating shaft 19, and a first tooth 1902 is provided at the head end of the rotating shaft 19; the rotating shaft 19 is provided in the fourth cavity 108, and the boss 1901 is located in the first wall groove 16, and the boss 1901 can slide in the first wall groove 16. In an optional embodiment, a part of the boss 1901 is installed in the second wall groove 17, and the number of the bosses 1901 is the sum of the number of the first wall groove 16 and the second wall groove 17.

[0139] The rear end of the driving shaft 20 is provided with a second tooth 2001 meshing with the first tooth 1902. The outer wall of the driving shaft 20 is provided with a plurality of ribs 2002, the number of which does not exceed the number of the second wall grooves 17. In a preferred embodiment, the number of the ribs 2002 is equal to the number of the second wall grooves 17. The rear end of the rib 2002 is provided with a third inclined surface 20021, and the inclination angle of the third inclined surface 20021 is preferably equal to the inclination angle of the first inclined surface 1504. The driving shaft 20 is disposed in the fourth cavity 108 and is close to the rear end of the housing 1 relative to the rotation axis 19. The rear end of the driving shaft 20 is also provided with an extension portion 2003 extending toward the rear end of the housing 1, and the rear end of the extension portion 2003 is provided with an outer flange 2004 extending outwardly along the radial direction of the driving shaft 20, and the extension portion 2003 and the outer flange 2004 are inserted into the rotating shaft 19, and the diameter of the outer flange 2004 is smaller than the inner diameter of the rotating shaft 19 and larger than the inner diameter of the inner flange 1904. When the first teeth 1902 of the driving shaft 20 and the second teeth 2001 on the rotating shaft 19 are meshed with each other, there is a certain distance between the inner flange 1904 and the outer flange 2004.

[0140] See also Fig.18aAs shown, in order to facilitate the insertion of the outer flange 2004 and the extension 2003 into the active cavity 1903, a slot is provided at the tail end of the extension 2003, so that the tail end of the extension 2003 has the ability to elastically deform radially inward. The diameter of the extension 2003 is slightly smaller than the inner diameter of the inner flange 1904, and the diameter of the outer flange 2004 is larger than the diameter of the inner flange 1904 and slightly smaller than the inner diameter of the active cavity 1903.

[0141] The second elastic member 21 can be a compression spring, and the second elastic member 21 is installed in the fourth cavity 108. When the third inclined surface 20021 is in contact with the first inclined surface 1504, the second elastic member 21 pushes the tail end of the rib 2002 to slide along the first inclined surface 1504 to the head end of the connector 1502, and the rib 2002 is blocked by the connector 1502 and thus cannot enter the first wall groove 16. At the same time, the rib 2002 is also blocked by the second wall edge 1503 so that the tail end of the rib 2002 stays at the tail end of the first inclined surface 1504. When the third inclined surface 20021 is in contact with the second inclined surface 1505, the second elastic member 21 pushes the tail end of the rib 2002 to slide along the second inclined surface 1505 to the second wall groove 17.

[0142] In this embodiment, the control component 200 further includes a fixing seat 22 located in the fourth cavity 108, and a positioning column 2201 extending toward the rear end of the housing 1 is provided on the fixing seat 22, and the second elastic member 21 is sleeved on the positioning column 2201, and one end of the second elastic member 21 contacts the fixing seat 22, and the other end of the second elastic member 21 contacts the driving shaft 20. By sleeved one end of the second elastic member 21 on the positioning column 2201, the second elastic member 21 can be ensured to have strong stability, and the position of the second elastic member 21 can be prevented from being offset. A countersunk hole 2005 is provided at the head end of the driving shaft 20, and one end of the second elastic member 21 is inserted into the countersunk hole 2005, so as to further improve the stability of the second elastic member 21.

[0143] In this embodiment, the head end of the ball part 2023 is provided with a third section 2024 extending toward the head end of the housing 1, and the third section 2024 is provided with a fifth threading hole connected to the first threading hole 203. A guide hole 1807 is provided between the first elastic part 1802 and the second elastic part 1803, and the third section 2024 is inserted into the guide hole 1807. The third section 2024 is cylindrical, and the diameter of the third section 2024 is equal to the diameter of the first section 2021. The cooperation between the third section 2024 and the guide hole 1807 can reduce the shaking of the head end of the center rod 2. Moreover, when the ball part 2023 moves toward between the first ball shell 1804 and the second ball shell 1805, the third section 2024 plays a guiding role, so that the ball part 2023 can enter between the first ball shell 1804 and the second ball shell 1805 more easily.

[0144] In this embodiment, a first cavity 104 is provided at the head end of the shell 1, and a sixth threading hole 109 is provided on the shell 1 between the first cavity 104 and the fixed seat 22. The sixth threading hole 109 is coaxial with the first threading hole 203. The fixed seat 22, the positioning column 2201, the driving shaft 20, the rotating shaft 19, and the ball clamp 18 are all provided with holes for the guide wire 4 to pass through. The guide wire 4 passes through the first cavity 104, the sixth threading hole 109, the fixed seat 22, the positioning column 2201, the driving shaft 20, the rotating shaft 19, the ball clamp 18 in sequence and is fixedly connected to the center rod 2.

[0145] In this embodiment, the catheter control mechanism further includes a sleeve 23, which includes a first tube 2301 and a second tube 2302 connected to each other; a slideway 1010 parallel to the central rod 2 and connected to the first lumen 104 is provided in the housing 1, the first tube 2301 is inserted into the slideway 1010 and can slide in the slideway 1010, and the second tube 2302 extends out of the housing 1. When in use, the pull rope can be inserted from the first lumen 104 and connected to the sleeve 23, and the pull rope can be pulled by sliding the first tube 2301 of the sleeve 23 in the slideway 1010, thereby controlling the valve clip. The number of sleeves 23 can be one, two or more, the number of slideways 1010 is equal to the number of sleeves 23, and the number of sleeves 23 should correspond to the number of pull ropes in the catheter.

[0146] In this embodiment, the catheter control mechanism further includes a wire tube 24 disposed in the first lumen 104, the wire tube 24 is provided with a central hole 2401 and side holes 2402 located around the central hole 2401, the central hole 2401 and the side holes 2402 both penetrate the head end and the tail end of the wire tube 24, and the number of the side holes 2402 is equal to the number of the sleeve 23. When in use, the guide wire 4 passes through the central hole 2401, and the pull rope passes through the side hole 2402. The guide wire 4 and the pull rope are separated by the wire tube 24, which can effectively prevent the guide wire 4 and the pull rope from being entangled with each other.

[0147] In this embodiment, the housing 1 is provided with an injection tube 25, and the injection tube 25 is provided with an injection channel 2501 connected to the first cavity 104. A syringe or a syringe pump can be used to connect the injection tube 25, and physiological saline / heparin saline can be injected into the first cavity 104 to flush the delivery catheter and the valve clip, and then the valve clip and the delivery catheter are sent into the bending sheath along the loader. It should be noted that the tail end of the sleeve 23 and the gap between the sleeve 23 and the housing 1 need to have good sealing performance to prevent leakage of physiological saline / heparin saline.

[0148] The configuration of the housing 1 in this embodiment can refer to the embodiment 1. The housing 1 in this embodiment can be assembled by a left half 101 and a right half 102. A plurality of buckle structures are provided on the joint surfaces of the left half 101 and the right half 102. The left half 101 and the right half 102 are assembled together by the aforementioned buckle structures. In order to ensure the sealing between the left half 101 and the right half 102 and prevent the liquid from leaking from the gap between the left half 101 and the right half 102, a sealing groove 1011 is provided on the left half 101 and the right half 102. The sealing groove 1011 is located outside the joint of the first cavity 104. A sealing gasket 26 is installed in the sealing groove 1011 to achieve a sealing effect.

[0149] In a further improved solution, the slideway 1010 includes a fixed section 10101 and a sliding section 10102 which are interconnected. The fixed section 10101 and the sliding section 10102 are both cylindrical, and the diameter of the fixed section 10101 is smaller than the diameter of the sliding section 10102, and the diameter of the sliding section 10102 is slightly larger than the diameter of the first tube 2301. The first tube 2301 is inserted into the sliding section 10102 and can slide in the sliding section 10102. A core tube 27 is fixed in the fixed section 10101. The outer diameter of the core tube 27 is slightly smaller than the inner diameter of the first tube 2301. The length of the core tube 27 is greater than the length of the fixed section 10101 so that one end of the core tube 27 is inserted into the first tube 2301. The sealing gasket 26 is provided with a first annular portion 2601 surrounding the outer side of the core tube. When in use, the pull rope passes through the core tube 27 from the first cavity 104 and is connected to the sleeve 23. The core tube 27 has a smoother inner wall, which can effectively prevent the pull rope from being worn, and the first annular portion 2601 surrounding the outer periphery of the core tube can prevent liquid from leaking from the gap between the core tube 27 and the outer shell 1.

[0150] In order to prevent liquid from leaking from the gap between the wire tube 24 and the housing 1 , a second annular portion 2602 surrounding the outer periphery of the wire tube 24 is further provided at the front end of the sealing gasket 26 .

[0151] The working principle of this embodiment is as follows:

[0152] Before use, under the thrust of the second elastic member 21, the tail end of the rib 2002 stays at the tail end of the first inclined surface 1504, the second tooth 2001 on the driving shaft 20 is separated from the first tooth 1902 on the rotating shaft 19, and the tooth top of the second tooth 2001 is misaligned with the first tooth 1902, the outer flange 2004 on the driving shaft 20 is in contact with the inner flange 1904 on the rotating shaft 19, the first ball shell 1804 and the second ball shell 1805 on the ball clamp 18 are located in the second cavity 106, and the ball part on the center rod 2 is 2023 is clamped between the first ball clamp 18 and the second ball clamp 18; at this time, when the center rod 2 is pulled, the pushing shaft 20 and the rotating shaft 19 cannot move toward the rear end of the outer shell 1, and the first ball shell 1804 and the second ball shell 1805 cannot move from the second cavity 106 to the socket 103. At the same time, due to the limitation of the inner wall of the second cavity 106, the first ball shell 1804 and the second ball shell 1805 cannot move radially outward along the outer shell 1, so the ball part 2023 cannot be dissociated from between the first ball shell 1804 and the second ball shell 1805.

[0153] During use, the center rod 2 is first pressed a short distance toward the head end of the shell 1, and the center rod 2 pushes the ball clamp 18 to move toward the head end of the shell 1, thereby driving the rotating shaft 19 to move toward the head end of the shell 1. When the first tooth 1902 on the rotating shaft 19 contacts the second tooth 2001 on the pushing shaft 20, the rotating shaft 19 drives the pushing shaft 20 to move toward the head end of the shell 1. When the head end of the rib 2002 is not in contact with the wall protrusion 15, under the interaction of the first tooth 1902 and the second tooth 2001, the pushing shaft 20 is driven to rotate around its own axis by a certain angle, and the first tooth 1902 and the second tooth 2001 are meshed with each other; then the pressing force applied to the center rod 2 is removed, and the elastic force of the second elastic member 21 pushes the pushing shaft 20 to move toward the tail end of the shell 1. When the third inclined surface 20021 on the rib 2002 contacts the second inclined surface 2001 When the inclined surface 1505 contacts, the tail end of the rib 2002 will slide along the second inclined surface 1505 into the second wall groove 17, and then the rib 2002 will continue to move along the second wall groove 17 toward the tail end of the shell 1; when the rib 2002 slides to the tail end of the second wall groove 17, the boss 1901 moves to the tail end of the first wall groove 16, and at this time the first ball shell 1804 and the second ball shell 1805 on the ball clamp 18 move into the socket 103; then pull the center rod 2, the ball part 2023 on the center rod 2 drives the first ball shell 1804 and the second ball shell 1805 to separate, until the ball part 2023 moves out from between the first ball shell 1804 and the second ball shell 1805, at this time, the center rod 2 can be pulled freely, thereby realizing the pulling operation of the guide wire 4, and at the same time, the center rod 2 can be driven to rotate clockwise through the rod head 201, thereby driving the guide wire 4 to rotate clockwise.

[0154] Moreover, after the ball part 2023 is removed from the ball chamber 1806 between the first ball shell 1804 and the second ball shell 1805, the ball part 2023 on the center rod 1 can be reinserted between the first ball shell 1804 and the second ball shell 1805 by pushing the center rod 2 toward the tail end of the outer shell 1, thereby realizing the repeated recovery operation of the valve clip.

[0155] So far, various embodiments of the present application have been described in detail. In order to avoid obscuring the concept of the present application, some details known in the art are not described. Based on the above description, those skilled in the art can fully understand how to implement the technical solution disclosed herein.

[0156] Although some specific embodiments of the present application have been described in detail by way of examples, it should be understood by those skilled in the art that the above examples are for illustration only and are not intended to limit the scope of the present application. It should be understood by those skilled in the art that the above embodiments may be modified or some technical features may be replaced by equivalents without departing from the scope and spirit of the present application. In particular, the various technical features mentioned in the various embodiments may be combined in any manner as long as there is no structural conflict.

Claims

1. A catheter control mechanism, characterized in that: include: The housing has a socket at its rear end; A center rod, comprising a rod body inserted into the insertion hole and a rod head located outside the housing, a plurality of key teeth being arranged on the outer wall of the rod body, the key teeth extending from the tail end of the rod body to the head end of the rod body, and the plurality of key teeth being distributed in a ring array around the axis of the rod body; A stopper connected to the housing and configured to limit the one-way rotation of the center rod together with the key teeth; A control assembly disposed in the housing and detachably connected to the shaft; and A guide wire is inserted into the housing from the head end of the housing and connected to the central rod.

2. The catheter control mechanism according to claim 1, characterized in that: The tooth top of the key tooth is provided with a tip portion and a chamfered portion, and the stopper comprises: A connecting seat connected to the housing; A stop block, which is located between two adjacent key teeth and is elastically connected to the connecting seat; When the center rod rotates clockwise, the chamfered portion can drive the stop block to move outward along the radial direction of the insertion hole; the tip is blocked by the stop block to prevent the center rod from rotating counterclockwise.

3. The catheter control mechanism according to claim 2, characterized in that: The tooth profile of the key tooth includes a straight line segment, an arc segment and a curved line segment connected in sequence, and the extension line of the straight line segment is coplanar with the axis of the center rod; on the key tooth, the part where the straight line segment and the arc segment are connected constitutes the tip, and the arc segment constitutes the chamfered portion.

4. The catheter control mechanism according to claim 3, characterized in that: The center angle of the arc segment does not exceed 90 degrees, and the center of the arc segment is located on the straight line segment.

5. The catheter control mechanism according to claim 2, characterized in that: One end of the stop block adjacent to the center rod is a spherical surface.

6. The catheter control mechanism according to any one of claims 1 to 5, characterized in that: The rod body includes a spherical part, a first section and a second section which are connected in sequence. The diameter of the spherical part is larger than the diameter of the first section. The root of the key tooth is fixedly connected to the outer wall of the second section. The distance between the tooth top of the key tooth and the axis of the center rod is smaller than the radius of the socket. The control component is detachably connected to the spherical part.

7. The catheter control mechanism according to claim 6, characterized in that: The central rod is provided with a first threading hole penetrating through the spherical body, and the spherical body is provided with a glue injection hole communicating with the first threading hole.

8. The catheter control mechanism according to claim 7, characterized in that: The first threading hole passes through the first section and at least passes through a portion of the second section. The second section is provided with a glue injection hole connected to the first threading hole.

9. The catheter control mechanism according to claim 6, characterized in that: The control component comprises: A clamp shell, wherein a receiving groove and a mounting hole are provided on the clamp shell, and the receiving groove runs through the rear end of the clamp shell; A driving block, the driving block is arranged in the accommodating groove and has a locking position and an unlocking position, the driving block is provided with a slide groove, the slide groove includes a first groove, a second groove, a third groove and a fourth groove, the extension direction of the first groove is parallel to the axis of the center rod, the third groove is located on a side of the first groove adjacent to the center rod, the tail end of the first groove is connected to the two ends of the third groove respectively through the second groove and the fourth groove, and the middle part of the third groove is bent toward the first groove; A limit column, the limit column comprising a plug-in section, a bridge section and a swing section connected in sequence, the plug-in section is perpendicular to the axis of the center rod and inserted into the mounting hole, the bridge section is located outside the clamping shell and the driving block, and the swing section is inserted into the slide groove and can slide in the first groove, the second groove, the third groove and the fourth groove; a first elastic member, the first elastic member being disposed between the driving block and the clamping shell, and the first elastic member pressing the driving block to move toward the rear end of the shell; A first clamp and a second clamp, wherein the first clamp and the second clamp are both rotatably connected to the tail end of the driving block; Wherein, when the driving block is in the locked position, the swing section is located in the third groove, and the ball part is stuck between the first clamp and the second clamp; when the driving block is in the unlocked position, the swing section is located at the head end of the first groove, the first clamp and the second clamp are opened to each other and the ball part can be released from between the first clamp and the second clamp.

10. The catheter control mechanism according to claim 9, characterized in that: The tail end of the driving block is provided with a first column and a second column parallel to each other, the first column is perpendicular to the center rod, the head end of the first clamp is sleeved on the first column, and the head end of the second clamp is sleeved on the second column, the control component also includes a first torsion spring sleeved on the first column and a second torsion spring sleeved on the second column, the first torsion spring and the second torsion spring respectively drive the tail end of the first clamp and the tail end of the second clamp to rotate in a direction away from the center rod.

11. The catheter control mechanism according to claim 9, characterized in that: A first ridge fixedly connected to the first clamp is provided between the first clamp and the clamp shell, and a second ridge fixedly connected to the second clamp is provided between the second clamp and the clamp shell, and the length direction of the first ridge and the second ridge is consistent with the axial direction of the center rod; a first release groove and a second release groove are respectively provided at the tail end of the clamp shell and are located on both sides of the accommodating groove, and the first release groove and the second release groove are both connected to the accommodating groove; along the axial direction of the center rod, the length of the first release groove and the second release groove is less than the length of the accommodating groove; when the driving block is in the unlocking position, the first ridge enters the first release groove, and the second ridge enters the second release groove.

12. The catheter control mechanism according to claim 9, characterized in that: The head end of the shell is provided with a first lumen, the drive block is provided with a second threading hole, the clamp shell is provided with a third threading hole, the shell is provided with a fourth threading hole located between the first lumen and the clamp shell, the fourth threading hole is communicated with the first lumen, the guide wire is sequentially inserted into the first lumen, the fourth threading hole, the third threading hole, the second threading hole and connected to the center rod.

13. The catheter control mechanism according to claim 7 or 8, characterized in that: The shell is provided with a second cavity, a third cavity and a fourth cavity which are connected in sequence and arranged in a straight line, the second cavity is connected with the jack, the fourth cavity is cylindrical, a plurality of wall protrusions are provided in the fourth cavity, the wall protrusions are adjacent to the tail end of the fourth cavity and are fixedly connected with the shell, the wall protrusions include a first wall edge, a connector and a second wall edge which are connected to each other, a first wall groove is defined by the first wall edge, the connector and the second wall edge, a second wall groove is defined between adjacent wall protrusions, a first inclined surface is provided at the head end of the first wall edge and the connector, and a second inclined surface is provided at the head end of the second wall edge; Along the axial direction of the fourth cavity, the lengths of the first wall edge and the second wall edge are equal; The control component comprises: A ball clamp, the ball clamp comprising a connecting portion, a first elastic portion, a second elastic portion, a first ball shell and a second ball shell, the head ends of the first elastic portion and the second elastic portion are both connected to the connecting portion and are parallel to each other, the first ball shell is connected to the tail end of the first elastic portion, the second ball shell is connected to the tail end of the second elastic portion, and a ball bin suitable for accommodating the ball portion is formed between the first ball shell and the second ball shell; A rotating shaft, wherein the connecting portion is connected to the tail end of the rotating shaft, a plurality of bosses are provided on the outer wall of the head end of the rotating shaft, the plurality of bosses are equidistantly spaced around the axis of the rotating shaft, and a first tooth is provided at the head end of the rotating shaft; the rotating shaft is arranged in the fourth cavity, the boss is located in the first wall groove, and the boss can slide in the first wall groove; the rotating shaft is provided with an active cavity running through both ends thereof, and an inner flange extending inward is provided on the inner wall of the head end of the active cavity; A driving shaft, wherein the rear end of the driving shaft is provided with a second tooth meshing with the first tooth, a plurality of ribs are provided on the outer wall of the driving shaft, the number of the ribs does not exceed the number of the second wall grooves, and the rear end of the ribs is provided with a third inclined surface; the driving shaft is arranged in the fourth cavity and is adjacent to the rear end of the housing relative to the rotating shaft; the rear end of the driving shaft is also provided with an extension portion extending toward the rear end of the housing, the rear end of the extension portion is provided with an outer flange extending outward, and the extension portion and the outer flange are inserted into the rotating shaft; a second elastic member, the second elastic member being located in the fourth cavity; Among them, when the third inclined surface is in contact with the first inclined surface, the second elastic member pushes the tail end of the rib to slide along the first inclined surface to the head end of the connector; when the third inclined surface is in contact with the second inclined surface, the second elastic member pushes the tail end of the rib to slide along the second inclined surface to the second wall groove.

14. The catheter control mechanism according to claim 13, characterized in that: The control component also includes a fixing seat located in the fourth cavity, the fixing seat is provided with a positioning column extending toward the rear end of the shell, the second elastic member is sleeved on the positioning column, one end of the second elastic member contacts the fixing seat, and the other end of the second elastic member contacts the driving shaft.

15. The catheter control mechanism according to claim 14, characterized in that: The head end of the spherical part is provided with a third section extending toward the head end of the shell, the third section is provided with a fifth threading hole connected to the first threading hole, a guide hole is provided between the first elastic part and the second elastic part, and the third section is inserted into the guide hole.

16. The catheter control mechanism according to claim 15, characterized in that: A first cavity is provided at the head end of the shell, and a sixth threading hole is provided on the shell between the first cavity and the fixing seat. The guide wire passes through the first cavity, the sixth threading hole, the fixing seat, the positioning column, the driving shaft, the rotating shaft, the ball clamp and is connected to the center rod in sequence.

17. The catheter control mechanism according to claim 16, characterized in that: It also includes a sleeve, which includes a first tube and a second tube connected to each other; a slideway parallel to the central rod and connected to the first cavity is provided in the shell, the first tube is inserted into the slideway and can slide in the slideway, and the second tube extends out of the shell.

18. The catheter control mechanism according to claim 17, characterized in that: The shell is composed of a left half and a right half, the left half and the right half are provided with sealing grooves, the sealing grooves are located outside the seams of the first cavity, and sealing pads are provided in the sealing grooves.

19. The catheter control mechanism according to claim 18, characterized in that: The slideway includes a fixed section and a sliding section which are interconnected. The first tube is inserted into the sliding section and can slide in the sliding section. A core tube is provided in the fixed section. One end of the core tube is inserted into the first tube. The sealing gasket is provided with a first annular portion surrounding the outer side of the core tube.

20. The catheter control mechanism according to claim 18, characterized in that: It also includes a wire tube arranged in the first cavity, the wire tube is provided with a central hole and side holes located around the central hole, the central hole and the side holes both pass through the head end and the tail end of the wire tube, and the number of the side holes is equal to the number of the sleeves; the sealing gasket is provided with a second annular portion surrounding the wire tube.

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