Elastic buckle type fixator for extracorporeal circulation pipeline

Abstract

The utility model discloses an elastic buckle type fixator for an extracorporeal circulation pipeline, and relates to the technical field of structural design of medical instruments and physical therapy instruments. According to the elastic buckle type fixator for the extracorporeal circulation pipeline, the clamping plates are rotationally connected to the box body, so that the extracorporeal circulation pipeline is clamped between the clamping plates. The problems that in an existing method for winding and fixing the pipeline through gauze, fixing is inconvenient, a large amount of time needs to be consumed for winding and fixing operation, and the tightness cannot be adjusted after fixing are solved. According to the elastic buckle type fixator for the extracorporeal circulation pipeline, through connection of the box body and the multiple clamping plates, the clamping plates can clamp the pipeline, so that the clamping plates rotate in one direction to clamp the pipeline, cooperation of multiple persons is not needed, and the operation efficiency is remarkably improved. And the rotating angle of the clamping plate can be adjusted according to the actual size of the pipe diameter of the pipeline, so that the pipelines with different sizes are effectively fixed, the fixing reliability and the operation convenience are remarkably improved, and the pipeline fixing device is simple in structure and durable in use.

Description

TECHNICAL FIELD

[0001] The utility model relates to medical instrument and physical treatment use equipment structure design technical field, especially, relate to a kind of extracorporeal circulation pipeline elastic buckle type fixer. BACKGROUND

[0002] Cardiothoracic surgery corrects heart or great vessel deformity, which needs extracorporeal circulation assistance. Extracorporeal circulation system includes multiple pipes with different functions. These pipes are important hubs connecting patient's own arteries and veins with artificial membrane lung. Once the connecting pipeline is pressed or folded, the return of venous blood is blocked, which may cause blood pump emptying and gas entering intracranial vessels. Arterial blood flow is blocked, which may cause ischemia and hypoxia of organs and tissues, and even endanger the patient's life.

[0003] Currently, the method for fixing extracorporeal circulation pipeline mainly uses gauze to wrap the pipeline and then uses hemostatic forceps to fix it on the surgical towel. The above method not only makes the pipeline prone to bending, twisting and winding, causing inconvenience when adjusting the pipeline, but also makes the operation cumbersome.

[0004] Secondly, when the pipeline needs to be adjusted, the entire fixation needs to be loosened and then re-bundled, which requires two people to cooperate to complete, which is extremely inconvenient and causes waste of time. In addition, if the gauze is too tight, it will deform the pipeline, and if it is too loose, it will make the pipeline slide down, making the pipeline on the table shorter and affecting the safety during the operation.

[0005] Therefore, the existing pipeline cannot be quickly fixed, and gauze is mainly used to wrap the pipeline, which requires two people to cooperate to complete. The operation is time-consuming and labor-intensive during use, and the clamping force cannot be adjusted when fixing the pipeline. SUMMARY

[0006] Therefore, the main purpose of the utility model is to provide an extracorporeal circulation pipeline elastic buckle type fixer, which can solve the problem of inability to adjust the clamping force in time and cumbersome operation in the prior art.

[0007] To achieve the above purpose, the technical scheme of the utility model is as follows:

[0008] In a preferred embodiment, it comprises a box body and multiple clamping plates, the clamping plates are rotatably connected to the box body, so that the extracorporeal circulation pipeline is clamped between the clamping plates.

[0009] In a preferred embodiment, it further comprises a dial, the clamping plates and the dial are connected through a ratchet mechanism, so that the clamping plates rotate and clamp in a set direction.

[0010] In a preferred embodiment, the clamping plates comprise a left clamping plate and a right clamping plate, the left clamping plate and the right clamping plate are oppositely arranged.

[0011] In a preferred embodiment, the ratchet mechanism includes: a first ratchet, a second ratchet, and a third ratchet;

[0012] In a preferred embodiment, the left clamping plate is integrally connected to the first ratchet and the second ratchet, and the teeth of the first ratchet and the second ratchet are opened in opposite directions;

[0013] In a preferred embodiment, the right clamping plate is integrally connected to the third ratchet, which is divided into a front part and a rear part, with the teeth of the front and rear parts opening in opposite directions.

[0014] In a preferred embodiment, the left clamping plate and the right clamping plate are arc-shaped, the inner wall of the arc is a clamping surface, and the clamping surface is provided with an anti-slip rubber layer.

[0015] In a preferred embodiment, the ratchet mechanism further includes: a first pawl, a second pawl, a third pawl, and a fourth pawl;

[0016] In a preferred embodiment, the dial includes: a first dial, a second dial, and a third dial;

[0017] In a preferred embodiment, the first pawl is provided near the end face of the first ratchet, and the second pawl is provided near the end face of the second ratchet. The first pawl and the second pawl are arranged in the same direction as the meshing direction of the teeth of the first ratchet and the second ratchet, respectively. The first pawl and the second pawl are symmetrically arranged and in opposite directions.

[0018] In a preferred embodiment, the second dial and the third dial are respectively provided with a third pawl and a fourth pawl near the end face of the third ratchet. The third pawl and the fourth pawl are arranged in the same direction as the meshing direction of the teeth of the front and rear parts of the third ratchet, respectively. The third pawl and the fourth pawl are symmetrically arranged and in opposite directions.

[0019] In a preferred embodiment, the dial is provided with a limiting post, and the first pawl, the second pawl, the third pawl, and the fourth pawl are respectively limited by the limiting post. The limiting post has an annular groove, and the first pawl, the second pawl, the third pawl, and the fourth pawl have circular holes. One end of the limiting spring is fixed in the annular groove of the limiting post, and the other end is connected to the circular holes of the first pawl, the second pawl, the third pawl, and the fourth pawl.

[0020] In a preferred embodiment, it further includes: a pressure rod, the pressure rod comprising: a left pressure rod head, a right pressure rod head, a connecting portion, and an end portion;

[0021] In a preferred embodiment, the housing is provided with a limiting groove, the connecting part is a square structure, the square structure is fitted and connected inside the square limiting groove, and the dial is fixedly connected to the outer wall of the connecting part;

[0022] In a preferred embodiment, a return spring is sleeved on the end portion, and one end of the return spring presses against the inner wall of the box.

[0023] In a preferred embodiment, the device further includes a torsion spring, which is connected to the connecting rod inside the housing. The torsion spring includes a bidirectional torsion spring and a unidirectional torsion spring. The torsion arm of the bidirectional torsion spring abuts against the arcuate inner wall of the left clamping plate, and the torsion arm of the unidirectional torsion spring abuts against the arcuate inner wall of the right clamping plate.

[0024] In a preferred embodiment, the box body includes an upper box and a lower box, and the upper box and the lower box are fixed together by a snap fastener.

[0025] In a preferred embodiment, the box body has a protrusion on the side near the left clamping plate and a sliding groove on the side near the right clamping plate, and the protrusion of the adjacent box body is engaged with the sliding groove for connection.

[0026] The present invention provides an elastic snap-fit ​​fixation device for extracorporeal circulation tubing, which has the following advantages: the clamping plate of the elastic snap-fit ​​fixation device is rotatably connected to the box body, so that the extracorporeal circulation tubing is clamped between the clamping plates.

[0027] This method solves the problems of inconvenience in fixing existing gauze-wrapped tubes, which require a lot of time for wrapping and fixing, and the inability to adjust the tightness after fixing.

[0028] This elastic snap-fit ​​retainer for extracorporeal circulation tubing, through the connection of a housing and multiple clamping plates, allows the clamping plates to clamp the tubing, achieving unidirectional rotational clamping without the need for multiple personnel, significantly improving operational efficiency. Furthermore, the clamping plates can adjust their rotation angle according to the actual diameter of the tubing, thus effectively securing tubing of different sizes, significantly improving fixation reliability and ease of operation. Its structure is simple and durable. Attached Figure Description

[0029] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on these drawings without creative effort.

[0030] Figure 1This is a schematic diagram of the structure of an elastic snap-fit ​​fixator for an extracorporeal circulation tubing according to one embodiment of this application;

[0031] Figure 2 This is a schematic diagram of another angle of an elastic snap-fit ​​fixator for extracorporeal circulation tubing according to one embodiment of this application;

[0032] Figure 3 This is a schematic diagram of the structure of an elastic snap-fit ​​retainer clamping plate for extracorporeal circulation tubing rotating to different positions according to one embodiment of this application;

[0033] Figure 4 This is a cross-sectional view of an elastic snap-fit ​​fixator for an extracorporeal circulation tubing according to one embodiment of this application;

[0034] Figure 5 This is a schematic diagram of the structure for removing the housing of an elastic snap-fit ​​fixator for extracorporeal circulation tubing according to one embodiment of this application;

[0035] Figure 6 This is a schematic diagram of the structure for removing the upper box of an elastic snap-fit ​​fixator for extracorporeal circulation tubing according to one embodiment of this application;

[0036] Figure 7 This is a schematic diagram of the structure of an extracorporeal circulation tubing elastic snap-fit ​​fixator according to one embodiment of this application, showing the upper box removed at another angle;

[0037] Figure 8 This is a schematic diagram of the structure of a pressure rod and dial of an elastic snap-fit ​​retainer for an extracorporeal circulation tubing according to one embodiment of this application;

[0038] Figure 9 This is a schematic diagram of the structure of an elastic snap-fit ​​retainer for extracorporeal circulation tubing with a pressure rod head separation according to one embodiment of this application;

[0039] Figure 10 This is a schematic diagram of the structure of a clamping plate for an elastic snap-fit ​​fixation device for an extracorporeal circulation tubing according to one embodiment of this application;

[0040] Figure 11 This is a schematic diagram of the structure of a double torsion spring for an elastic snap-fit ​​fixation device for an extracorporeal circulation tubing according to one embodiment of this application;

[0041] Figure 12 This is a schematic diagram of a single torsion spring in an elastic snap-fit ​​fixation device for an extracorporeal circulation tubing according to one embodiment of this application.

[0042] Figure 13 This is a schematic diagram of the structure of an elastic snap-fit ​​retainer cover and a torsion spring for an extracorporeal circulation tubing according to one embodiment of this application;

[0043] Figure 14 This is a schematic diagram of the structure of a flexible snap-fit ​​retainer dial for an extracorporeal circulation tubing according to one embodiment of this application;

[0044] Figure 15 This is a schematic diagram of the structure of the second dial of an elastic snap-fit ​​fixator for extracorporeal circulation tubing according to one embodiment of this application;

[0045] Figure 16 This is a schematic diagram of the structure of two boxes combined in an elastic snap-fit ​​fixation device for an extracorporeal circulation tubing according to one embodiment of this application.

[0046] [Explanation of Key Component Symbols]

[0047] 010. Clamping plate;

[0048] 020. Left clamping plate; 030. Right clamping plate; 040. Anti-slip rubber layer;

[0049] 1. Dial;

[0050] 11. First dial; 12. Second dial; 13. Third dial;

[0051] 2. Box body;

[0052] 21. Upper box; 22. Lower box; 23. Protrusion; 24. Sliding groove;

[0053] 3. Ratchet mechanism;

[0054] 31. First ratchet; 32. Second ratchet; 33. Third ratchet;

[0055] 34. First pawl; 35. Second pawl; 36. Third pawl; 37. Fourth pawl;

[0056] 4. Limiting post;

[0057] 5. Limiting spring;

[0058] 6. Compression bar;

[0059] 61. Left push rod head; 62. Right push rod head; 63. Connecting part; 64. End part;

[0060] 7. Return spring;

[0061] 8. Torsion spring;

[0062] 81. Double-direction torsion spring; 82. Single-direction torsion spring. Detailed Implementation

[0063] The following detailed description of an elastic snap-lock fixator for extracorporeal circulation tubing according to the present invention, in conjunction with the accompanying drawings and embodiments thereof, will be provided in further detail.

[0064] It should be noted that, unless otherwise specified, the embodiments and features described in this application can be combined with each other. The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0065] It should be noted that the terminology used herein is for the purpose of describing particular embodiments only and is not intended to limit the exemplary embodiments according to this application. As used herein, the singular form is intended to include the plural form as well, unless the context clearly indicates otherwise. Furthermore, it should be understood that when the terms "comprising" and / or "including" are used in this specification, they indicate the presence of features, steps, operations, devices, components, and / or combinations thereof.

[0066] It should be noted that the terms "first," "second," etc., in the specification, claims, and accompanying drawings of this application are used to distinguish similar objects and are not necessarily used to describe a specific order or sequence. It should be understood that such data can be interchanged where appropriate so that the embodiments of this application described herein can be implemented, for example, in orders other than those illustrated or described herein. Furthermore, the terms "comprising" and "having," and any variations thereof, are intended to cover non-exclusive inclusion; for example, a process, method, system, product, or apparatus that comprises a series of steps or units is not necessarily limited to those steps or units explicitly listed, but may include other steps or units not explicitly listed or inherent to such processes, methods, products, or apparatus.

[0067] For ease of description, spatial relative terms such as "above," "on top of," "on the upper surface of," "above," etc., are used herein to describe the spatial positional relationship of a device or feature as shown in the figures to other devices or features. It should be understood that spatial relative terms are intended to encompass different orientations in use or operation beyond the orientation of the device as described in the figures. For example, if the device in the figures were inverted, a device described as "above" or "on top of" other devices or structures would subsequently be positioned as "below" or "under" other devices or structures. Thus, the exemplary term "above" can include both "above" and "below." The device may also be positioned in other different ways (rotated 90 degrees or in other orientations), and the spatial relative descriptions used herein will be interpreted accordingly.

[0068] according to Figures 1-16As shown, the extracorporeal circulation tubing elastic snap-fit ​​retainer includes: a housing 2 and multiple clamping plates 010. The clamping plates 010 are rotatably connected to the housing 2, allowing them to clamp when rotated clockwise and loosen when rotated counterclockwise. This enables the extracorporeal circulation tubing to be clamped between the clamping plates 010 or to have the clamping plates 010 loosen their clamping.

[0069] To enable the clamping plate 010 to clamp the pipeline by rotation in one direction and lock by rotation in the opposite direction, this elastic snap-lock fixator for the extracorporeal circulation pipeline also includes a dial 1. The clamping plate 010 and the dial 1 are connected by a ratchet mechanism 3, which allows the clamping plate 010 to rotate and clamp in a set direction. The ratchet mechanism 3 enables the clamping plate 010 to clamp by rotation in one direction and lock by rotation in the opposite direction, ensuring that the clamping plate 010 fits and fixes pipelines of different diameters. The self-locking feature of the ratchet mechanism 3 also prevents the clamping plate 010 from loosening in the opposite direction. Furthermore, the self-locking feature of the ratchet mechanism 3 effectively prevents external forces from causing the clamping plate 010 to loosen, significantly improving the reliability of fixation and ease of operation.

[0070] To enable unidirectional rotation of the clamping plate 010 and prevent it from loosening under external force, the clamping plate 010 includes a left clamping plate 020 and a right clamping plate 030. The left clamping plate 020 and right clamping plate 030 are symmetrically arranged on the left and right sides of the housing 2. This allows the left clamping plate 020 and right clamping plate 030 to rotate from the left and right sides of the housing 2 towards the center to clamp the pipe, thus preventing the pipe from sliding out of the retainer from either the left or right clamping plate 020. The ratchet mechanism 3 includes a first ratchet 31, a second ratchet 32, and a third ratchet 33. The left clamping plate 020 is integrally connected to the first ratchet 31 and the second ratchet 32. The first ratchet 31 and the second ratchet 32 ​​extend from the outer side of the left clamping plate 020, and the extended portions are arc-shaped, with the middle portions of the arc-shaped structures integrally connected. The first ratchet 31 and the second ratchet 32 ​​are coaxial, and the ratchet teeth of the first ratchet 31 and the second ratchet 32 ​​are inclined in opposite directions relative to the axis, that is, the opening direction of the teeth of the first ratchet 31 and the second ratchet 32 ​​is opposite.

[0071] The right clamping plate 030 is integrally connected to the third ratchet 33, which extends from the outer side of the right clamping plate 030 with an arc-shaped extension. The teeth of the third ratchet 33 are divided into a front and a rear section, integrally connected, with the front and rear sections sharing the same plane of symmetry and coaxiality. The front and rear ratchet teeth are inclined in opposite directions relative to the axis, meaning their opening directions are opposite. This ensures that the ratchet can only rotate clockwise or counterclockwise when its teeth engage with a pawl in the same direction. This ensures even distribution of clamping force, adapts to stable fixing of pipes of different diameters, and prevents accidental loosening under external interference.

[0072] To facilitate clamping of the pipeline by the clamping plate 010, the left clamping plate 020 and the right clamping plate 030 are arc-shaped, with the inner wall of the arc serving as the clamping surface, which is the side of the clamping plate that contacts the pipeline. The arc-shaped inner wall increases the contact area with the pipeline. The clamping surface is provided with an anti-slip rubber layer 040. By covering the clamping surface with an anti-slip rubber layer 040, the friction between the clamping plate 010 and the pipeline can be increased, thus making it less likely for the pipeline to slide up and down during the clamping process.

[0073] To ensure that the pawl of the ratchet mechanism 3 can always extend into the ratchet during movement, the ratchet mechanism 3 further includes: a first pawl 34, a second pawl 35, a third pawl 36, and a fourth pawl 37. The dial 1 includes: a first dial 11, a second dial 12, and a third dial 13.

[0074] The first dial 11 has a first pawl 34 near the end face of the first ratchet 31, allowing the first pawl 34 to extend into the first ratchet 31. A second pawl 35 is provided near the end face of the second ratchet 32, allowing the second pawl 35 to extend into the second ratchet 32. The first pawl 34 and the second pawl 35 are oriented in the same direction as the meshing direction of the teeth of the first ratchet 31 and the second ratchet 32, respectively. The first pawl 34 and the second pawl 35 are symmetrically arranged with opposite directions. This allows the first pawl 34 to clamp onto the left clamping plate 020 when the first ratchet 31 rotates clockwise, and to lock onto the left clamping plate 020 when it rotates counterclockwise. The second pawl 35 allows the left clamping plate 020 to loosen when the second ratchet 32 ​​rotates counterclockwise, and to lock onto the left clamping plate 020 when it rotates clockwise. This configuration ensures that when the dial 1 moves with the pressure lever 6, the first pawl 34 moves away from the first ratchet 31, while the second pawl 35 remains engaged with the teeth of the second ratchet 32. When the pressure lever 6 is reset by the return spring 7, the second pawl 35, under external force, can engage with the teeth of the second ratchet 32, thus ensuring that the first pawl 34 remains engaged with the first ratchet 31. This ensures that the teeth of the first ratchet 31 and the second ratchet 32 ​​can always engage with the first pawl 34 and the second pawl 35 under different rotational states. It prevents the pawl and teeth from failing to engage due to different positions. This avoids engagement failure caused by the displacement of the dial 1, enhancing the reliability and continuity of the one-way locking mechanism.

[0075] The second dial 12 and the third dial 13 are respectively provided with a third pawl 36 and a fourth pawl 37 near the end face of the third ratchet 33, allowing the third pawl 36 and the fourth pawl 37 to extend into the third ratchet 33. The orientation of the third pawl 36 and the fourth pawl 37 is the same as the meshing direction of the front and rear teeth of the third ratchet 33, respectively. The third pawl 36 and the fourth pawl 37 are symmetrically arranged and in opposite directions. This allows the third pawl 36 to lock the right clamping plate 030 when the front teeth of the third ratchet 33 rotate counterclockwise, and to release the right clamping plate 030 when rotated clockwise. The fourth pawl 37 can lock the right clamping plate 030 when the rear teeth of the third ratchet 33 rotate clockwise, and to clamp the right clamping plate 030 when rotated counterclockwise. This configuration ensures that when the dial 1 moves with the pressure lever 6, the fourth pawl 37 moves away from the third ratchet 33, allowing the third pawl 36 to always engage with the teeth of the third ratchet 33. When the pressure lever 6 is reset by the return spring 7, the third pawl 36, under external force, can engage with the teeth of the third ratchet 33, thus ensuring that the fourth pawl 37 always extends into the third ratchet 33, preventing the pawl and teeth from failing to engage due to different positions. This ensures that the teeth of the third ratchet 33 can always engage with either the third pawl 36 or the fourth pawl 37 under different rotational states, avoiding engagement failure caused by the displacement of the dial 1, and enhancing the reliability and continuity of the one-way locking mechanism.

[0076] To limit the displacement range of the ratchet pawls in the ratchet mechanism 3 during their rotational movement while engaging the ratchet teeth, the dial 1 is equipped with limiting posts 4. The first pawl 34, second pawl 35, third pawl 36, and fourth pawl 37 are each limited by a limiting post 4. The limiting post 4 has an annular groove, and the first pawl 34, second pawl 35, third pawl 36, and fourth pawl 37 have circular holes. One end of a limiting spring 5 is fixed in the annular groove of the limiting post 4, and the other end is connected to the circular hole of the first pawl 34, second pawl 35, third pawl 36, and fourth pawl 37. The limiting post 4 and the limiting spring 5 cooperate to constrain the displacement range of the first pawl 34, second pawl 35, third pawl 36, and fourth pawl 37. When the first ratchet 31 clamps the pipeline, it drives the first pawl 34 located on the first dial 11 to move downwards. The limiting spring 5 connecting the first pawl 34 and the limiting post 4 is subjected to pressure and undergoes elastic deformation. When the first ratchet 31 continues its clamping motion, the limiting spring 5 releases its elastic potential energy, causing the first pawl 34 to rebound, ensuring that the first pawl 34 quickly returns to its initial engagement position after being subjected to force, thus achieving an automatic reset function. This extends the service life of the mechanism while maintaining precise control of the unidirectional rotation of the clamping plate 010. The limiting posts 4 on the second pawl 35, third pawl 36, and fourth pawl 37 operate on the same principle as the limiting post 4 that limits the first pawl 34.

[0077] To enable the lever 6 to move within the limiting groove of the housing 2, the system further includes a lever 6, comprising a left lever head 61, a right lever head 62, a connecting portion 63, and an end portion 64. The left lever head 61 and the right lever head 62 have protrusions at their side contact points, while the right lever head 62 and the left lever head 61 have grooves at their side contact points. The protrusions of the left lever head 61 and the grooves of the right lever head 62 are engaged with each other. The left lever head 61 and the right lever head 62 are respectively fixedly connected to the connecting portion 63. The housing 2 has a limiting groove, and the connecting portion 63 has a square structure, restricting the rotation of the lever 6. The square structure, when fitted within the square limiting groove, constrains the range of motion of the lever 6, preventing deviation or jamming during movement and ensuring the stability and smooth operation of the dial 1 and the ratchet mechanism 3. To allow the pressure rod 6 to return to its original position within the box, a dial 1 is fixedly connected to the outer wall of the connecting part 63, and a return spring 7 is sleeved on the end part 64. One end of the return spring 7 presses against the inner wall of the box 2. The return spring 7 provides an automatic rebound force for the pressure rod 6, allowing it to quickly return to its initial position after being pressed. This facilitates continuous operation and repeated clamping adjustments, reduces manual intervention steps, and improves operational efficiency during surgery.

[0078] To enable the clamping plate 010 to automatically release after the pressure rod 6 is pressed in, a torsion spring 8 is also included. A connecting rod within the housing 2 connects to the spiral portion of the torsion spring 8. The torsion spring 8 includes a bidirectional torsion spring 81 and a unidirectional torsion spring 82. The torsion arm of the bidirectional torsion spring 81 abuts against the arc-shaped inner wall of the left clamping plate 020, and the torsion arm of the unidirectional torsion spring 82 abuts against the arc-shaped inner wall of the right clamping plate 030. When the clamping plate 010 rotates, it drives the torsion arm of the torsion spring 8. The bidirectional torsion spring 81 and the unidirectional torsion spring 82 undergo elastic deformation due to torsional force, converting it into elastic potential energy. When the clamping plate 010 is released, since it is no longer locked by the pawl and gear teeth, the torsion spring 8 releases its stored elastic potential energy to restore its original shape, pulling the clamping plate 010 back to its initial position. This provides a release rebound force for the left clamping plate 020 and the right clamping plate 030, achieving the automatic reset function of the clamping plate 010 and simplifying the operation process.

[0079] To enable quick assembly and disassembly of box 2, box 2 includes an upper box 21 and a lower box 22, which are fixed together by snap-fit ​​fasteners. Designing box 2 as a detachable upper box 21 and lower box 22 simplifies the production, assembly, and maintenance process. The connection between the upper box 21 and lower box 22 features male and female stops to prevent the clamping plate from shifting during use, improving the overall stability and reliability of the fixture. Snap-fit ​​fasteners are located at the male stop of the upper box 21, and slots are located at the female stop of the lower box 22. The male and female stops are fixed together by snap-fit ​​fasteners and slots. The detachable box 2 is connected by snap-fit ​​fasteners and slots, enabling quick assembly and disassembly and maintenance, ensuring convenient cleaning and replacement of internal components, and maintaining stable positioning of the clamping plate through precise alignment design.

[0080] To accommodate multiple fixators, the housing 2 has a protrusion 23 near the left clamping plate 020 and a sliding groove 24 near the right clamping plate 030. The sliding groove 24 is a guide groove that matches the shape of the protrusion 23. The protrusions 23 of adjacent housings 2 are engaged with the sliding groove 24 for connection. The bottom end of the protrusion 23 on the side of housing 2 is aligned with the upper end of the sliding groove 24 of another housing 2, allowing the protrusion 23 to slide into the sliding groove 24, ensuring that multiple housings 2 can be fixed by engaging the protrusions 23 with the sliding groove 24. This adapts to the tubing layout requirements of different surgical scenarios, improving the flexibility and scalability of the fixation system while ensuring a stable connection.

[0081] The above description is merely a preferred embodiment of the present utility model and is not intended to limit the scope of protection of the present utility model.

Claims

1. A flexible snap-lock fixation device for extracorporeal circulation tubing, characterized in that, include: The box body (2) and multiple clamping plates (010) are rotatably connected to the box body (2) so that the extracorporeal circulation pipeline is clamped between the clamping plates (010); It also includes: a dial (1), the clamping plate (010) and the dial (1) are connected by a ratchet mechanism (3) so that the clamping plate (010) can be rotated and clamped in a set direction; The clamping plate (010) includes a left clamping plate (020) and a right clamping plate (030), which are arranged opposite to each other. The ratchet mechanism (3) includes: a first ratchet (31), a second ratchet (32) and a third ratchet (33); The left clamping plate (020) is integrally connected to the first ratchet (31) and the second ratchet (32), and the teeth of the first ratchet (31) and the second ratchet (32) are opened in opposite directions; The right clamping plate (030) is integrally connected to the third ratchet (33), which is divided into a front part and a rear part, with the teeth of the front part and the rear part opening in opposite directions.

2. The elastic snap-lock fixation device for extracorporeal circulation tubing according to claim 1, characterized in that, The left clamping plate (020) and the right clamping plate (030) are arc-shaped, the inner wall of the arc is the clamping surface, and the clamping surface is provided with an anti-slip rubber layer (040).

3. The elastic snap-lock fixation device for extracorporeal circulation tubing according to claim 2, characterized in that, The ratchet mechanism (3) further includes: a first pawl (34), a second pawl (35), a third pawl (36), and a fourth pawl (37); The dial (1) includes: a first dial (11), a second dial (12) and a third dial (13). The first dial (11) is provided with a first pawl (34) near the end face of the first ratchet (31) and a second pawl (35) near the end face of the second ratchet (32). The first pawl (34) and the second pawl (35) are arranged in the same direction as the meshing direction of the teeth of the first ratchet (31) and the second ratchet (32), respectively. The first pawl (34) and the second pawl (35) are symmetrically arranged and in opposite directions. The second dial (12) and the third dial (13) are respectively provided with the third pawl (36) and the fourth pawl (37) near the end face of the third ratchet (33). The third pawl (36) and the fourth pawl (37) are arranged in the same direction as the meshing direction of the front and rear teeth of the third ratchet (33), respectively. The third pawl (36) and the fourth pawl (37) are symmetrically arranged and in opposite directions.

4. The elastic snap-lock fixation device for extracorporeal circulation tubing according to claim 3, characterized in that, The dial (1) is provided with a limiting post (4). The first pawl (34), the second pawl (35), the third pawl (36) and the fourth pawl (37) are respectively limited by the limiting post (4). The limiting post (4) has an annular groove. The first pawl (34), the second pawl (35), the third pawl (36) and the fourth pawl (37) have round holes. One end of the limiting spring (5) is fixed in the annular groove of the limiting post (4), and the other end is connected to the round holes of the first pawl (34), the second pawl (35), the third pawl (36) and the fourth pawl (37).

5. The elastic snap-fit ​​fixator for extracorporeal circulation tubing according to claim 4, characterized in that, Also includes: The pressure rod (6) includes: a left pressure rod head (61), a right pressure rod head (62), a connecting part (63), and an end part (64). The box body (2) is provided with a limiting groove, the connecting part (63) is a square structure, the square structure is connected to the inside of the square limiting groove, and the dial (1) is fixedly connected to the outer wall of the connecting part (63). The end portion (64) is fitted with a return spring (7), one end of which presses against the inner wall of the box body (2).

6. The elastic snap-fit ​​fixation device for extracorporeal circulation tubing according to claim 5, characterized in that, Also includes: Torsion spring (8), the inner connecting rod of the box body (2) connects to the torsion spring (8), the torsion spring (8) includes: bidirectional torsion spring (81) and unidirectional torsion spring (82), the torsion arm of the bidirectional torsion spring (81) abuts against the arc-shaped inner wall of the left clamping plate (020), and the torsion arm of the unidirectional torsion spring (82) abuts against the arc-shaped inner wall of the right clamping plate (030).

7. The elastic snap-fit ​​fixator for extracorporeal circulation tubing according to claim 6, characterized in that, The box body (2) includes an upper box (21) and a lower box (22), and the upper box (21) and the lower box (22) are fixed together by a snap fastener.

8. The elastic snap-fit ​​fixation device for extracorporeal circulation tubing according to claim 7, characterized in that, The box body (2) has a protrusion (23) on the side near the left clamping plate (020) and a sliding groove (24) on the side near the right clamping plate (030). The protrusion (23) of the adjacent box body (2) is engaged with the sliding groove (24) for connection.

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