Guide wire locking structure and rotary grinding device

Abstract

The utility model provides a guide wire locking structure and a rotary grinding device, and relates to the technical field of guide wire limiting structures, and the guide wire locking structure comprises a shell which is provided with a containing cavity, so that a guide wire penetrates through the shell through the containing cavity; the clamping mechanism is used for locking the guide wire penetrating through the accommodating cavity; the clamping mechanism comprises a clamping piece which is located in the containing cavity and used for locking the guide wire penetrating through the clamping piece. The first limiting piece is located on the shell and extends to one side of the clamping piece; the second limiting piece is located on the side, away from the first limiting piece, of the clamping piece; the first limiting piece and the second limiting piece synchronously exert pressure on the clamping piece in the radial direction and the axial direction, so that the clamping piece is limited and deformed to lock the guide wire, and the problems that in an existing rotary grinding scene, fixing of the guide wire is prone to losing efficacy, and stability is not enough are solved.

Description

Technical Field

[0001] The utility model relates to the technical field of guide wire limiting structures, in particular to a guide wire locking structure and a gyratory grinding device. Background Art

[0002] Rotational atherectomy, also known as arterial atherectomy, is a minimally invasive surgical procedure used to treat endovascular diseases. This procedure mainly uses a rotational atherectomy device to remove plaque or narrowing in the artery, thereby restoring blood flow, relieving symptoms, and improving the patient's quality of life. This type of surgery is usually used to treat a series of diseases caused by arteriosclerosis or plaque formation, such as coronary artery disease and peripheral artery disease.

[0003] In atherectomy, the stability of the guidewire is a key factor in ensuring the success of the operation. However, existing atherectomy devices have certain limitations in the market, especially in the guidewire locking mechanism, which affects the surgical risk and the incidence of complications. An unstable guidewire may lead to incomplete plaque removal, or even cause vascular damage or guidewire breakage, increasing the patient's surgical risk and the difficulty of subsequent treatment.

[0004] In the existing atherectomy handle design, the guide wire locking design is prone to failure during high-speed rotation, causing the guide wire to move or rotate, affecting the accuracy and safety of the operation. It also requires an additional operating switch, and repeated operations are required during the instrument intervention process and when the handle is replaced, which increases the operation time and the doctor's operating burden. Utility Model Content

[0005] In order to overcome the above technical defects, the purpose of the present utility model is to provide a guide wire locking structure and a rotational atherectomy device to solve the problems of easy failure of guide wire fixation and insufficient stability in existing rotational atherectomy scenarios.

[0006] The utility model discloses a guide wire locking structure, comprising:

[0007] The housing has a receiving cavity, so that the guide wire passes through the housing through the receiving cavity;

[0008] A clamping mechanism, used for locking the guide wire passing through the accommodating cavity;

[0009] The clamping mechanism comprises:

[0010] A clamping member, located in the accommodating cavity, and used to lock the guide wire passing through the clamping member;

[0011] A first limiting member, located on the housing and extending to one side of the clamping member;

[0012] A second limiting member, located at a side of the clamping member away from the first limiting member;

[0013] The first limiting member and the second limiting member simultaneously apply pressure to the clamping member in the radial direction and the axial direction, so that the clamping member is limited and deformed to lock the guide wire.

[0014] Preferably, the clamping member comprises a through-going deformation portion and a supporting portion;

[0015] The deformation portion is configured as a tapered structure whose diameter gradually decreases from a side close to the support portion to a side away from the support portion, and a port for the guide wire to enter is formed at an end away from the support portion;

[0016] The second limiting member extends to the end of the supporting portion, and the first limiting member extends to the conical surface of the deforming portion, and pressure is applied simultaneously so that the deforming portion deforms toward the center of the port near the port and closely matches the guide wire.

[0017] Preferably, the deformation portion comprises at least two deformation plates;

[0018] One end of each of the deformable plates is connected to the support portion, and the other end cooperates to form the port;

[0019] There is a gap between two adjacent deformable plates, and the gap decreases after the deformable plates are compressed.

[0020] Preferably, the first limiting member comprises positioning columns distributed along the circumference of the shell and corresponding to each of the deformation plates;

[0021] Each of the positioning posts comprises:

[0022] A column, fixed to the housing, having a receiving groove facing the deformation plate and extending out of the column;

[0023] A top ball, located at the end of the column, closing the notch of the receiving groove;

[0024] A limit spring is placed in the receiving groove, one end of which is connected to the top ball and the other end of which is connected to the bottom of the receiving groove;

[0025] A slide groove matched with the top bead is provided on each of the deformation plates, and the slide groove extends along one side of the port to one side of the support portion.

[0026] Preferably, the column is provided with a snap-on socket corresponding to the sliding groove on one side of the notch of the accommodating groove.

[0027] Preferably, the shell is formed with a diameter-changing portion on the side where the first limiting member is located, the diameter-changing portion corresponding to the clamping member and used for constraining the end of the clamping member.

[0028] Preferably, the second limiting member comprises:

[0029] A limiting body connected to the shell and partially extending into the accommodating cavity;

[0030] A push pin passes through the limiting body and extends out of both ends of the limiting body, and is elastically connected to the limiting body via a preload spring sleeved thereon;

[0031] A through slot, located in the ejector pin and coaxially connected to the clamping member;

[0032] One end of the ejector pin extending out of the limiting body and located in the accommodating cavity can abut against the clamping member.

[0033] Preferably, a limiting nut is also provided on the limiting body.

[0034] Preferably, the housing comprises a first housing, a second housing and a connecting housing;

[0035] The first shell and the second shell are connected to form the accommodating cavity;

[0036] The connecting shell is sleeved at the connection between the first shell and the second shell to fix the first shell and the second shell.

[0037] The utility model also provides a rotational atherectomy device, comprising any one of the guide wire locking structures described above.

[0038] Compared with the prior art, the above technical solution has the following beneficial effects:

[0039] 1. The guide wire locking structure and atherectomy device provided by the utility model allow the guide wire to pass through the housing and be limited by the clamping mechanism. The second limiting member applies force to the end of the clamping member, and at the same time, the head end of the first limiting member corresponds to the slide groove on the clamping member so that the clamping member is coaxially centered and the head end is forced to be close together, so as to lock the guide wire, reduce the forward and backward movement or rotation of the guide wire, improve the stability of the atherectomy device during use, and solve the problem that the guide wire fixation is easy to fail and the stability is insufficient in the existing atherectomy scenario;

[0040] 2. The guidewire locking structure is based on the first limit member and the second limit member so that the clamping member keeps the head ends together in a normal state, that is, a locked state. During the instrument intervention process or when the handle is replaced, the second limit member is operated to move away from the clamping member so that the clamping member is unlocked to allow the guidewire to pass through, and the lock is restored after the operation. This is different from the existing situation where multiple repeated operations are required, or operations are required to fix the guidewire. It reduces the complexity of the operation, reduces the risks caused by operational errors or forgetfulness, and improves work efficiency. BRIEF DESCRIPTION OF THE DRAWINGS

[0041] Figure 1 It is a structural schematic diagram of embodiments 1 and 2 of a guide wire locking structure and a rotational atherectomy device according to the utility model;

[0042] Figure 2 It is a structural schematic diagram of a clamping member in a guide wire locking structure and a rotational atherectomy device according to the utility model;

[0043] Figure 3 It is a structural schematic diagram of a positioning column in Embodiment 1 of a guide wire locking structure and a rotational atherectomy device according to the utility model;

[0044] Figure 4 It is a structural schematic diagram of the second position-limiting member in the first embodiment of a guide wire locking structure and a rotational atherectomy device according to the utility model;

[0045] Figure 5 This is a structural schematic diagram of the cooperation between the top ball and the slide groove in the first embodiment of the guide wire locking structure and the rotational grinding device described in the utility model.

[0046] Reference numerals:

[0047] 1-shell; 11-first shell; 12-second shell; 13-connecting shell; 14-diameter change portion; 2-accommodating chamber; 3-clamping member; 31-deformation portion; 311-deformation plate; 312-slide groove; 32-supporting portion; 33-port; 4-first limiting member; 41-positioning column; 411-column; 4111-accommodating groove; 4112-bayonet; 412-top ball; 413-limiting spring; 5-second limiting member; 51-limiting body; 52-top pin; 53-through groove; 54-preload spring; 55-limiting nut; 6-guiding structure. DETAILED DESCRIPTION

[0048] The advantages of the present invention are further described below in conjunction with the accompanying drawings and specific embodiments.

[0049] Exemplary embodiments will be described in detail herein, examples of which are shown in the accompanying drawings. When the following description refers to the drawings, the same numbers in different drawings represent the same or similar elements unless otherwise indicated. The embodiments described in the following exemplary embodiments do not represent all embodiments consistent with the present disclosure. Instead, they are merely examples of devices and methods consistent with some aspects of the present disclosure as detailed in the appended claims.

[0050] The terms used in this disclosure are for the purpose of describing specific embodiments only and are not intended to limit the disclosure. The singular forms of "a", "said" and "the" used in this disclosure and the appended claims are also intended to include plural forms unless the context clearly indicates otherwise. It should also be understood that the term "and / or" used herein refers to and includes any or all possible combinations of one or more associated listed items.

[0051] It should be understood that although the terms first, second, third, etc. may be used in the present disclosure to describe various information, such information should not be limited to these terms. These terms are only used to distinguish the same type of information from each other. For example, without departing from the scope of the present disclosure, the first information may also be referred to as the second information, and similarly, the second information may also be referred to as the first information. Depending on the context, the word "if" as used herein may be interpreted as "at the time of" or "when" or "in response to determining".

[0052] In the description of the present invention, it should be understood that the terms "longitudinal", "lateral", "up", "down", "front", "back", "left", "right", "vertical", "horizontal", "top", "bottom", "inside", "outside", etc., indicating orientations or positional relationships, are based on the orientations or positional relationships shown in the accompanying drawings, and are only for the convenience of describing the present invention 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 should not be understood as a limitation on the present invention.

[0053] In the description of the present utility model, unless otherwise specified and limited, it should be noted that the terms "installation", "connection" and "connection" should be understood in a broad sense. For example, it can be a mechanical connection or an electrical connection, or it can be the internal connection of two components. It can be a direct connection or an indirect connection through an intermediate medium. For ordinary technicians in this field, the specific meanings of the above terms can be understood according to the specific circumstances.

[0054] In the following description, the suffixes such as "module", "component" or "unit" used to represent elements are only used to facilitate the description of the present invention, and they themselves have no specific meaning. Therefore, "module" and "component" can be used interchangeably.

[0055] Embodiment 1: This embodiment provides a guide wire locking structure, which is applied to rotational atherectomy. In view of the problems of insufficient stability and complicated operation of the locking structure in the existing rotational atherectomy device, Figure 1 , comprising: a housing 1, having a receiving chamber 2 penetrating the housing 1, so that the guide wire passes through the housing 1 through the receiving chamber 2; a clamping mechanism, a core clamping and locking component, located in the receiving chamber 2, to lock / lock the guide wire passing through the receiving chamber 2; so that the guide wire can always be locked by the clamping mechanism during use, avoiding being driven to rotate by the transmission shaft / transmission mechanism, thereby improving the stability of the guide wire. Specifically, the clamping mechanism comprises:

[0056] The clamping member 3 is located in the accommodating cavity 2 and is used for the guide wire to pass through and lock the guide wire passing through the clamping member 3. It should be noted that the clamping member 3 can move in the accommodating cavity 2, but is limited by the arrangement of the first limiting member 4 and the second limiting member 5 described below, and the clamping member 3 can at least partially deform. Specifically, it can be at least partially made of elastic material, or at least partially have a deformable space, or a combination of the two, so that the clamping member 3 is further compressed and deformed after being limited, thereby realizing the operation of locking the guide wire;

[0057] A first limiting member 4 is located on the housing 1 and extends to one side of the clamping member 3;

[0058] A second limiting member 5 is connected to the housing 1 and is located on a side of the clamping member 3 away from the first limiting member 4;

[0059] The first limiting member 4 and the second limiting member 5 respectively apply pressure to the two ends of the clamping member 3 simultaneously so that the clamping member 3 is limited and deformed to closely cooperate with the guide wire to lock the guide wire. Specifically, pressure is applied simultaneously in the radial and axial directions, axial limiting and radial deformation are performed. The clamping member 3 is in the accommodating chamber 2 and can be slidably connected to the inner wall of the accommodating chamber 2. The first limiting member 4 and the second limiting member 5 act on the axial ends of the clamping member 3. After pressure is applied, the clamping member 3 changes from an active state to a fixed state. Further pressure is applied so that the clamping member 3 (at least partially) is deformed to closely fit a certain area on the guide wire in the circumferential direction to lock the guide wire. It should be noted that the deformation is that the clamping member 3 can synchronously fit toward the outer wall of the guide wire in the relative direction (gathering) to radially and axially limit the guide wire.

[0060] In the present embodiment, it can be understood that the shell 1 and the clamping member 3 are coaxially arranged so that the guide wire passes through, and further the first limit member 4 and the second limit member 5 are also coaxially arranged with the clamping member 3 and are connected, so that the guide wire enters the accommodating chamber 2 through one end of the shell 1, passes through the first limit member 4, the clamping member 3, the second limit member 5 in sequence and then passes out from the other end of the shell 1, and the guide wire is fixed by locking the guide wire through the deformation of the clamping member 3. The coaxial constraint makes the guide wire have higher coaxiality. The present embodiment specifically takes the arrangement of the first limit member 4, the clamping member 3, and the second limit member 5 in sequence from left to right on the shell 1 as an example.

[0061] In this embodiment, refer to Figure 2The clamping member 3 includes a through deformation portion 31 and a support portion 32, and the guide wire can pass through the deformation portion 31 and the support portion 32 in sequence. The deformation portion 31 is used to generate deformation to lock the guide wire, and the support portion 32 is used for connecting the clamping member 3, supporting and guiding the guide wire, etc. As mentioned above, the deformation portion 31 can be made of elastic material, or have a deformable space, and the support portion 32 can maintain a certain hardness and supporting force. The deformation portion 31 is configured as a conical structure with a diameter gradually decreasing from a side close to the support portion 32 to a side away from the support portion 32, and a port 33 for the guide wire to enter is formed at the end away from the support portion 32; the second limit member 5 extends to the end of the support portion 32, and the first limit member 4 extends to the conical surface of the deformation portion 31, that is, after force is applied, the second limit member 5 contacts the end of the support portion 32, and the first limit member 4 contacts the conical surface of the deformation portion 31, so that the deformation portion 31 is deformed / aggregated toward the center near the port 33 and closely fits the guide wire.

[0062] Based on the above, the deformation part 31 is set to a conical structure and a port 33 for the guide wire to enter is formed at the end, and an inclined surface is formed on the side facing the first limiter 4, so that the first limiter 4 acts on the conical surface of the deformation part 31 (i.e., on the inclined surface), generating a force toward the center of the deformation part 31, and the deformation part 31 is deformed toward the center after being subjected to the force, that is, close to the direction of fitting with the guide wire. It can be further understood that due to the inclined surface formed on the deformation part 31, the force of the first limiter 4 can be dispersed along the guide wire direction and perpendicular to the guide wire direction, wherein the part of the force dispersed in the horizontal direction (along the guide wire direction) can cooperate with the force of the second limiter 5 acting on the end of the support part 32 to limit the movement of the clamp 3 in the accommodating cavity 2, and the force dispersed perpendicular to the guide wire direction (towards the center) can circumferentially / radially limit the movement of the guide wire, thereby improving the stability of the guide wire locking.

[0063] As an option, the deformation part 31 can be supported by but not limited to brass, titanium alloy, copper alloy, spring steel and other materials. Furthermore, the deformation part 31 is formed by at least two deformation plates 311. The plate is thin and can be easily deformed / moved after being subjected to force. One end of each deformation plate 311 is connected to the support part 32, and the other end cooperates to form the port 33. There is a gap between two adjacent deformation plates 311. After being compressed, the gap is reduced to fit closely with the guide wire. The gap provides the space required for the deformation part 31 to deform radially toward the center (guide wire). There are at least two deformation plates 311, and it can be more, such as four, eight, etc., to form a claw-shaped clamping mechanism, which realizes clamping and release under the cooperation of the first limit member 4 and the second limit member 5.

[0064] In this embodiment, refer to Figure 3 and Figure 5The first limiting member 4 includes positioning columns 41 distributed along the circumference of the shell 1 and corresponding to each of the deformation plates 311; each of the positioning columns 41 includes: a column 411, fixed to the shell 1, having a receiving groove 4111 facing the deformation plate 311 and extending from the column 411, the column 411 can be threadedly connected to the shell 1 through an external thread set thereon, and can also be fixed on the shell 1 in the direction toward the deformation plate 311 through other methods; a top ball 412, located at the end of the column 411, closes the notch of the accommodating groove 4111; a limit spring 413, placed in the accommodating groove 4111, one end of which is connected to the top ball 412, and the other end is connected to the bottom of the groove of the accommodating groove 2, the limit spring 413 provides the first limit member 4 with a force acting on the clamping member 3; each of the deformation plates 311 is provided with a slide groove 312 that cooperates with the top ball 412, and the slide groove 312 extends along one side of the port 33 to one side of the support portion 32.

[0065] Based on the above, the first limit member 4 can control the opening and closing of the claw-shaped clamping member 3, and each positioning column 41 is set to correspond to each deformation plate 311. Each positioning column 41 forms a circumferential distribution relative to the deformation portion 31. The positioning column 41 realizes the sliding connection between the first limit member 4 and the clamping member 3 through the top bead 412 set thereon and the slide groove 312 set on the deformation plate 311. The positioning column 41 is fixed on the housing 1. The clamping member 3 can realize the movement relative to the first limit member 4 with the cooperation of the second limit member 5. Specifically, Figure 1 Or 5, the second limit member 5 is arranged on one side of the support portion 32. When the second limit member 5 contacts the clamping member 3, a force acting to the left along the direction of the guide wire is formed, which will push the clamping member 3 to move to the left. The limit spring 413 is compressed to different degrees, and the positioning column 41 moves relative to the deformation plate 311 from the side of the port 33 to the side close to the support portion 32 (to the right). However, since the positioning column 41 is fixed, the deformation plate 311 will move to the left. During this process, the deformation plate 311 is subjected to the pressure of the top bead 412 on the side of the port 33 where the guide wire enters, and the compressed part moves / bends / deforms toward the center (guide wire). The deformation plate 311 can gather at the port 33 to achieve a close fit with the guide wire.

[0066] In this embodiment, the column 411 is provided with a bayonet 4112 corresponding to the slide groove 312 on one side of the notch of the receiving groove 4111, and the bayonet 4112 is used to connect the groove wall of the slide groove 312, so that the column 411 of the positioning column 41 and the slide groove 312 always maintain a sliding connection, thereby limiting the top ball 412 to always be located in the slide groove 312, improving the stability of the connection between the positioning column 41 and the slide groove 312, and the preload force of the internal limit spring 413 can achieve the top ball 412 at the head end being pressed into the column 411 after being subjected to a certain pressure, and returning to the original position when the pressure is reduced or removed. The positioning column 41 can provide a positive pressure of 0.5-20N, and when the top ball 412 moves to different positions in the slide groove 312, the limit spring 413 can be compressed to different degrees.

[0067] It can be understood that the top ball 412 at the head end is pressed into the interior of the column 411 after being subjected to a certain pressure, and the limit spring 413 is compressed, which will form a reaction force acting on the deformation plate 311, that is, the above-mentioned first limit member 4 can be dispersed into a force along the guide wire direction and perpendicular to the guide wire direction on the clamping member 3 until the clamping member 3 is stably and tightly fitted with the guide wire.

[0068] In this embodiment, as an option, the inner diameter of the shell 1 gradually decreases on the side where the first limit member 4 is located, forming a diameter-changing portion 14 corresponding to the end of the clamp 3 and capable of constraining the end of the clamp 3; the positioning column 41 passes through the diameter-changing portion 14 and extends to the deformation portion 31; thus, the inner diameter of the diameter-changing portion 14 can be set to correspond to the outer diameter of the deformation portion 31 (such as being the same or smaller than), and when the clamp 3 is pushed to move to the left by the second limit member 5, the deformation portion 31 can enter the diameter-changing portion 14 and fit tightly, thereby further limiting each deformation plate 311, causing it to gather together, thereby improving the stability of guide wire locking. As an option, the positioning column 41 can pass through the shell 1 in a direction perpendicular to the diameter-changing portion 14 and extend to the deformation portion 31, so that the positioning column 41 is perpendicular to the surface of the deformation plate 311, so that the force acting on the deformation portion 31 by the positioning column 41 can be evenly dispersed, a part of which is dispersed to cooperate with the second limiting member 5 to limit the clamping member 3, and the other part is dispersed to make the deformation of the deformation portion 31 fit closely with the guide wire, thereby improving the locking effect.

[0069] Specifically, taking the clamping member 3 including four deformation plates 311 as an example Figure 2 The clamping member 3 forms a structure similar to a four-claw clamping structure, with a stepped structure with a variable diameter, and a central through hole (for the guide wire to pass through) formed by wire cutting or the like in the center, and the diameter of the central through hole needs to be larger than the outer diameter of the clamped guide wire. Figure 2As shown, it has a certain taper, and the diameter gradually increases from small to large. The clamping mechanism needs to use a metal material with a certain toughness. Each deformation plate 311 has a cut-formed slide 312 in the middle, so that the top ball 412 acts on the deformation plate 311 with uniform force. The number of slides 312 is consistent with the number of deformation plates 311. The positioning column with a retractable top ball 412 and the slide 312 cooperate with the structure to achieve at least partial temporary deformation of the clamping member 3 under force to clamp the guide wire.

[0070] In this embodiment, the second limiter 5 applies a force to the clamping member 3, the purpose of which is to make the clamping member 3 move in the direction of the first limiter 4 under the force, so as to cooperate with the first limiter 4 in locking / releasing the clamping member 3, and in order to further simplify the operation, it is necessary to set the force to facilitate the application and cancellation. The second limiter 5 is arranged on one side of the support portion 32 of the clamping member 3, so the force on the clamping member 3 can be achieved through the structure of the telescopic ejector pin, and other structures that can be telescopic to achieve the effect on the clamping member 3 can also be used for this purpose, specifically, Figure 4 As shown, the second limiting member 5 includes: a limiting body 51, which is connected to the shell 1 and partially extends into the accommodating chamber 2; a push pin 52, which is located in the limiting body 51 and extends out of both ends of the limiting body 51, and is slidably connected in the limiting body 51 through a preload spring 54 sleeved thereon; a through groove 53, which is located in the push pin 52 and is coaxially connected to the clamping member 3 for the guide wire to pass through and maintain coaxiality; the end of the push pin 52 extending out of the limiting body 51 and located in the accommodating chamber 2 can contact the clamping member 3.

[0071] Based on the above, the limiting body 51 can be provided with an external thread on its upper middle section or right section, and the external thread is threadedly connected to the inner wall of the accommodating chamber 2, so that the limiting body 51 can be conveniently controlled to partially enter the accommodating chamber 2. The preload spring 54 is sleeved outside the ejector pin 52, one end of which is connected to the ejector pin 52, and the other end is connected to the inner wall of the accommodating chamber 2. The ejector pin 52 can move left and right in the limiting body 51 and is restricted by the preload spring 54. The through groove 53 is connected to the clamping member 3, so that the guide wire directly passes through. After assembly, the ejector pin 52 extends and contacts the end of the support portion 32 of the clamping member 3. At this time, the preload spring 54 is in a compressed state, and the preload force of the preload spring 54 causes the head end of the ejector pin 52 to provide an axial positive pressure on the clamping member 3. As an option, the positive pressure can be controlled to be 1-30N according to factors such as the wire diameter, material and matching size of the preload spring 54. The push pin 52 may be provided with a pull ring shaft (located at the tail end of the push pin 52) at one end extending from the limiting body 51 and located outside the accommodating chamber 2, which is convenient for pushing and pulling, so as to facilitate pulling backwards, further compressing the preload spring 54, reducing the axial positive pressure at the head end, and releasing the pressure on the clamping member 3, thereby achieving unlocking of the guide wire by the clamping member 3. After the push pin 52 is released, the push pin 52 will be reset to its original position under the action of the restoring force of the preload spring 54, and still provide the maximum axial positive pressure to limit the clamping member 3.

[0072] Optionally, in order to improve the connection stability between the limiting body 51 and the shell 1, a limiting nut 55 is further provided on the limiting body 51. The limiting nut 55 is located on the limiting body 51. When the limiting body 51 is partially assembled into the accommodating chamber 2, the limiting nut 55 abuts against the end of the shell 1. Through the setting of the limiting nut 55, the length of the limiting body 51 entering the accommodating chamber 2 can be conveniently limited, thereby accurately controlling the position and coordination of the second limiting member 5 and the clamping member 3.

[0073] In this embodiment, the shell 1 can be shaped according to the actual application scenario. For example, Figure 1 As shown, it includes a first shell 11, a second shell 12 and a connecting shell 13; in this embodiment, the first shell 11 and the second shell 12 can both be flanges, such as the first shell 11 is a fixed flange, and the second shell 12 is a locking flange, and the two are coaxially fixed by fixing pins or screws and nuts to ensure that the accommodating cavity 2 is coaxially formed, that is, the first shell 11 and the second shell 12 are connected to form the accommodating cavity 2, and the flange body can be CNC-processed by metal materials, such as aluminum alloy, stainless steel and other materials; it can also be formed by mold opening and injection molding of materials such as PC and ABS to reduce component costs.

[0074] The connecting shell 13 is sleeved on the connection between the first shell 11 and the second shell 12 to fix the first shell 11 and the second shell 12. The connecting shell 13 is a structure for fixing the first shell 11 and the second shell 12, and can be any form of structure. It is pre-installed by screws, snaps and other fixing methods, and then assembled and connected with the handle of the rotational grinding device; the clamping member 3 is placed in the first shell 11; the first limiting member 4 is located on the side of the first shell 11 away from the second shell 12; the second limiting member 5 is located in the second shell 12 and extends to the clamping member 3. This setting is convenient for assembly and can be adjusted according to the actual application scenario.

[0075] As an explanation, the clamping mechanism in this embodiment places the clamping member 3 in the first housing 11, and the top bead 412 at the head end of the first limiting member 4 and the slide groove 312 on the deformation plate 311 are matched to make the clamping member 3 coaxially centered and the head end forced together; then the first housing 11 and the second housing 12 are fixed by screws and coaxial pins and assembled together on the connecting housing 13, and finally the second limiting member 5 is screwed into the accommodating cavity 2 through the thread at the rear end of the second housing 12 until it is completely tightened, at which time the top pin 52 of the second limiting member 5 contacts the supporting part of the clamping member 3, and pushes the clamping member 3 to the left, and can even completely press the head end of the clamping member 3 into the diameter-changing part 14 at the end of the housing 1. The diameter-changing part 14 (diameter-changing structure) of the housing 1 and the embedded positioning column 41 simultaneously apply force, so that the deformation plate 311 with the slide groove is retracted toward the axis to generate a clamping force on the guide wire.

[0076] The first shell 11 and the second shell 12 are coaxially fixed, and the clamping member 3 and the second limit member 5 are also coaxially arranged in the accommodating chamber 2, so that the guide wire passes through, thereby improving the coaxiality of the overall structure, reducing the risk of the guide wire being swung and bent or broken due to the additional stress caused by the high-speed rotation of the transmission shaft, and further improving the stability and safety of the use process.

[0077] The thickness of the limiting nut 55 pre-installed on the second limiting member 5 can be used to adjust the depth of screwing in, so as to adjust the size of the positive pressure of the head end of the push pin 52 on the clamping member 3. After all are assembled, the guide wire locking structure can realize the self-locking function, and the axial pressure on the clamping member 3 can also be reduced by pulling the pull ring at the tail of the push pin 52 backward. At this time, the force of the limiting spring 413 in the positioning column 41 will press the clamping member 3 out of the head end diameter change structure (i.e., the diameter change part 14) of the shell 1 through the push bead 412. At this time, the clamping member 3 moves to the right, and the pressure of the end of the positioning column 41 on the deformation plate 311 is reduced, thereby realizing the temporary opening of the deformation part 31 for the guide wire to pass through. After the tail of the push pin 52 is loosened, it automatically rebounds and restores the locking state under the action of the preload spring 54. It should also be noted that the clamping mechanism of this embodiment is based on the first limit member 4 and the second limit member 5 being in the normal state. At this time, the head end of the ejector pin 52 is in contact with the end of the clamping member 3, and cooperates with the positioning column 41 to give axial and radial restrictions to the clamping member 3. The deformation portion 31 of the clamping member 3 is retracted toward the axis and maintained under the restriction of the positioning column 41, that is, the clamping member 3 is in a locked state. When the instrument is intervened or the handle type is changed, the tail end of the ejector pin 52 is pulled to make the head end of the ejector pin 52 move away from the clamping member 3, so that the deformation portion 31 is temporarily opened, that is, the clamping member 3 is in an unlocked state. After the guide wire enters and passes through the shell 1 from the end where the first limit piece 4 is located, the tail end of the push pin 52 is released and it automatically returns to the locked state, that is, a structure is provided to maintain the locked state under normal conditions and unlock after operation. Even if the guide wire enters the shell 1, it needs to be operated before it can pass. Therefore, it is different from the guide wire fixing structure commonly used in the prior art, which does not work under normal conditions. The design of fixing the guide wire in a working state after the guide wire passes through avoids the situation where the fixing structure is operated after the existing guide wire passes through, resulting in forgetting to operate, effectively reducing the risk of operating errors during use and reducing the complexity of operation.

[0078] The clamping mechanism of this embodiment forms a multi-claw clamping clamping member 3 with a pre-tightened ejector pin 52 and a positioning column 41. After locking the guide wire, the tensile strength of the guide wire can reach more than 10N, which is greater than the average tensile strength of existing products. During high-speed atherectomy, it can ensure that the guide wire is locked sufficiently stably, reduce the forward and backward movement or rotation of the guide wire, and reduce the risk of vascular damage. At the same time, during surgical treatment, the guide wire only needs to be able to move forward and backward in the handle during the instrument intervention stage and the postoperative withdrawal stage. The self-locking function (locking and releasing through the second limiter) of this structure does not require additional operation to lock the guide wire, reducing the complexity of the operation, avoiding the risk of guide wire breakage and vascular damage caused by the rotation or movement of the guide wire caused by forgetting to lock the guide wire during high-speed atherectomy, and improving safety.

[0079] Embodiment 2: This embodiment also provides a rotational atherectomy device, comprising the guide wire locking structure described in any one of the above-mentioned embodiments, wherein the guide wire locking structure is connected to the rotational atherectomy handle, so as to improve the stability of the guide wire locking and reduce the risk of the guide wire moving forward and backward or rotating during high-speed rotational atherectomy.

[0080] Further, an auxiliary guiding structure may be provided, such as a guiding structure connected to the side of the housing 1 where the guide wire enters (the side where the diameter-changing portion 14 is located), and the guiding structure may optionally extend from the housing 1 to the port 33 on the clamp 3 for the guide wire to enter, thereby guiding the entry of the guide wire, further ensuring that the guide wire can maintain the axial center during the insertion process, reducing the resistance caused by misalignment, and further improving the stability of the guide wire fixation. As an example, the guiding structure may be selected from a guide tube, a groove-shaped guiding member, or a guiding device with a diameter-changing structure, etc.

[0081] In this embodiment, the guidewire locking structure can be connected or assembled with other devices to achieve applications in different rotational atherectomy scenarios.

[0082] It should be noted that the embodiments of the present invention have better practicability and do not impose any form of limitation on the present invention. Any technician familiar with the field may use the technical content disclosed above to change or modify it into an equivalent effective embodiment. However, any modification or equivalent changes and modifications made to the above embodiments based on the technical essence of the present invention without departing from the content of the technical solution of the present invention are still within the scope of the technical solution of the present invention.

Claims

1. A guide wire locking structure, characterized in that: include: The housing has a receiving cavity, so that the guide wire passes through the housing through the receiving cavity; A clamping mechanism, used for locking the guide wire passing through the accommodating cavity; The clamping mechanism comprises: A clamping member, located in the accommodating cavity, and used to lock the guide wire passing through the clamping member; A first limiting member, located on the housing and extending to one side of the clamping member; A second limiting member, located at a side of the clamping member away from the first limiting member; The first limiting member and the second limiting member simultaneously apply pressure to the clamping member in the radial direction and the axial direction, so that the clamping member is limited and deformed to lock the guide wire.

2. The guidewire locking structure according to claim 1, characterized in that: The clamping member includes a through deformation portion and a supporting portion; The deformation portion is configured as a tapered structure whose diameter gradually decreases from a side close to the support portion to a side away from the support portion, and a port for the guide wire to enter is formed at an end away from the support portion; The second limiting member extends to the end of the supporting portion, and the first limiting member extends to the conical surface of the deforming portion, and pressure is applied simultaneously so that the deforming portion deforms toward the center of the port near the port and closely matches the guide wire.

3. The guide wire locking structure according to claim 2, characterized in that: The deformation portion includes at least two deformation plates; One end of each of the deformable plates is connected to the support portion, and the other end cooperates to form the port; There is a gap between two adjacent deformable plates, and the gap decreases after the deformable plates are compressed.

4. The guidewire locking structure according to claim 3, characterized in that: The first limiting member includes positioning columns distributed along the circumference of the shell and corresponding to each of the deformation plates; Each of the positioning posts comprises: A column, fixed to the housing, having a receiving groove facing the deformation plate and extending out of the column; A top ball, located at the end of the column, closing the notch of the receiving groove; A limit spring is placed in the accommodating groove, one end of which is connected to the top ball and the other end is connected to the bottom of the accommodating groove; each of the deformation plates is provided with a slide groove that cooperates with the top ball, and the slide groove extends along one side of the port to one side of the supporting part.

5. The guidewire locking structure according to claim 4, characterized in that: The column is provided with a snap-on opening corresponding to the sliding groove at one side of the notch of the accommodating groove.

6. The guidewire locking structure according to claim 1, characterized in that: The shell has a diameter-changing portion formed on the side where the first limiting member is located, the diameter-changing portion corresponding to the clamping member and used to constrain the end of the clamping member.

7. The guidewire locking structure according to claim 1, characterized in that: The second limiting member comprises: A limiting body connected to the shell and partially extending into the accommodating cavity; A push pin passes through the limiting body and extends out of both ends of the limiting body, and is elastically connected to the limiting body via a preload spring sleeved thereon; A through slot, located in the ejector pin and coaxially connected to the clamping member; One end of the ejector pin extending out of the limiting body and located in the accommodating cavity can abut against the clamping member.

8. The guidewire locking structure according to claim 7, characterized in that: The limiting body is also provided with a limiting nut.

9. The guidewire locking structure according to claim 1, characterized in that: The housing comprises a first housing, a second housing and a connecting housing; The first shell and the second shell are connected to form the accommodating cavity; The connecting shell is sleeved at the connection between the first shell and the second shell to fix the first shell and the second shell.

10. A rotational atherectomy device, characterized in that: The invention comprises the guidewire locking structure described in any one of claims 1 to 9.

Images