Hemodialysis instrument replacement liquid connector capable of preventing sealing cover from being jacked off

Abstract

The utility model discloses a replacement liquid connector capable of preventing a sealing cover from being jacked off for a hemodialysis instrument, relates to the technical field of medical instruments, and can solve the problem that the sealing cover of the replacement liquid connector is easily jacked up when the liquid pressure is too large. The hemodialysis instrument replacement liquid connector capable of preventing the sealing cover from being jacked off comprises a base plate, the sealing cover, a pull rod, a locking and pressing spring arranged on the pull rod in a sleeving mode and an anti-off frame installed on the base plate. One end of the pull rod is connected to the seat plate, the other end of the pull rod penetrates through the seat plate and the anti-falling frame, a clamping groove is formed in the side wall of the pull rod, and an elastic jacking assembly partially clamped into the clamping groove is arranged in the anti-falling frame.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a replacement fluid connector for a hemodialysis machine that prevents the cap from falling off. Background Technology

[0002] The replacement fluid connector is a key component in the external fluid circulation system of a hemodialysis machine.

[0003] The replacement fluid connector is equipped with a cap. When the hemodialysis machine is working normally, the cap needs to be pulled away from the base plate and rotated to expose the internal connector assembly, so as to connect to the external liquid circulation system and realize external liquid circulation. After the work is completed, when the fluid circulation system needs to be cleaned, the cap needs to be pulled and rotated to seal the connector assembly, so that the cleaning fluid only flows in the internal liquid circulation pipeline of the hemodialysis machine, thus realizing the cleaning function.

[0004] The existing replacement fluid connector is equipped with a check valve, and the pipe and cap connected to the replacement fluid connector are equipped with a push pin to open the check valve. When the push pin in the cap is used to open the check valve before using the replacement fluid connector, the cap may be opened due to excessive hydraulic pressure.

[0005] Therefore, there is an urgent need for a replacement fluid connector for hemodialysis machines that can prevent the cap from being pushed off by the liquid pressure, so as to ensure that the cap can be removed normally without being pushed off by the liquid pressure, thereby solving the above problems. Summary of the Invention

[0006] The purpose of this application is to provide a replacement fluid connector for a hemodialysis machine that can prevent the cap from being pushed off, thus solving the problem that the cap of the replacement fluid connector is easily pushed off when the fluid pressure is too high.

[0007] To solve the above-mentioned technical problems, the present invention adopts the following solution:

[0008] This application provides a replacement fluid connector for a hemodialysis machine that can prevent the cap from falling off, including a seat plate and a cap, a pull rod and a locking spring fitted on the pull rod, and an anti-dislodgement bracket installed on the seat plate;

[0009] One end of the pull rod is connected to the seat plate, and the other end passes through the seat plate and the anti-slip bracket. The side wall of the pull rod is provided with a slot, and the anti-slip bracket is provided with an elastic pressing component that is partially inserted into the slot.

[0010] Optionally, the anti-detachment frame includes an integrated mounting part, a connecting part, and a limiting part;

[0011] The anti-slip bracket is fixedly connected to the base plate via the mounting part;

[0012] The connecting part is set parallel to the tie rod;

[0013] The limiting part is located at the end of the connecting part away from the mounting part, and the limiting part is provided with a mounting hole perpendicular to the connecting part;

[0014] The pull rod is provided with mounting holes that pass through the seat plate, the mounting part and the limiting part in sequence, and the slot on the pull rod is provided facing the mounting hole;

[0015] The elastic pressing component is disposed in the mounting hole of the limiting part.

[0016] Optionally, the elastic pressing assembly includes an elastic element and a ball disposed in the mounting hole, one end of the elastic element pressing against the ball, the other end pressing against the limiting part, and the end of the ball away from the elastic element pressing against the pull rod.

[0017] The pressing direction of the elastic element is parallel to the axial direction of the slot.

[0018] Optionally, the elastic element is a spring or an air cushion.

[0019] Optionally, the opening shape of the slot is circular, and the cross-sectional shape is arc-shaped.

[0020] Optionally, the tie rod is also provided with a mounting ring groove;

[0021] It also includes a blocking assembly installed on the mounting ring groove, with one end of the pressure spring pressing against the mounting part or the base plate, and the other end pressing against the blocking assembly.

[0022] Optionally, the blocking assembly includes an annular retaining ring fitted onto and slidably connected to the pull rod, and an open retaining ring installed in the mounting groove;

[0023] The inner diameter of the annular retaining ring is smaller than the outer diameter of the open retaining ring.

[0024] Optionally, the mounting portion of the anti-slip bracket is detachably fixed to the base plate by bolts.

[0025] Optionally, the pull rod extends outward from one end of the anti-detachment frame with an extension section, the length of which is greater than or equal to the height of the cover.

[0026] Optionally, a connector assembly mounted on the base plate is also included.

[0027] The beneficial effects of this utility model are:

[0028] This application solves the problem that the cap of the replacement fluid connector is easily lifted when the liquid pressure is too high by setting a pull rod with a slot and a top-pressing component located in the anti-detachment frame. Under normal conditions, the pull rod is locked by the top-pressing component and will not be pulled by the cap simply because of excessive liquid pressure. When it is necessary to pull and rotate the cap, since the elastic top-pressing component has a certain elasticity, the operator only needs to apply a large pulling force to overcome the pulling force of the top-pressing spring and the elastic top-pressing component at the same time to pull the cap.

[0029] Therefore, the core concept of this application is to apply a pressure that presses radially against the groove of the pull rod, so that the pull rod will not be pulled by excessive liquid pressure, nor will it cause the operator to be unable to pull the cover and the pull rod after applying a large pulling force, thereby effectively solving the problems of the prior art. Attached Figure Description

[0030] Figure 1 This is a three-dimensional structural diagram of an embodiment of this application.

[0031] Figure 2 This is a schematic diagram of the main view structure of an embodiment of this application.

[0032] Figure 3 This is a cross-sectional structural diagram of an embodiment of this application.

[0033] Figure 4 for Figure 3 A magnified view of a portion of point A in the middle.

[0034] Figure 5 This is a cross-sectional structural schematic diagram from another perspective of an embodiment of this application.

[0035] Explanation of reference numerals in the attached figures:

[0036] 1-Cap, 2-Seat plate, 3-Pull rod, 301-Slot, 302-Mounting ring groove, 31-Extension section, 4-Locking spring, 5-Anti-detachment bracket, 51-Mounting part, 52-Connecting part, 53-Limiting part, 531-Mounting hole, 6-Connecting nozzle assembly, 7-Elastic pressing assembly, 71-Elastic element, 72-Ball, 8-Blocking assembly, 81-Annular retaining ring, 82-Opening retaining ring. Detailed Implementation

[0037] The present invention will be further described in detail below with reference to the embodiments and accompanying drawings, but the implementation of the present invention is not limited thereto.

[0038] In the description of this utility model, it should be noted that the terms "center", "upper", "lower", "left", "right", "vertical", "longitudinal", "lateral", "horizontal", "inner", "outer", "front", "rear", "top", "bottom", etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings, or the orientation or positional relationship commonly used when the utility model product is in use. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0039] In the description of this utility model, it should also be noted that, unless otherwise explicitly specified and limited, the terms "set up," "have," "install," "connect," and "connect" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral connection; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; and they can refer to the internal connection of two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0040] The present invention will now be described in detail with reference to the accompanying drawings and embodiments.

[0041] like Figures 1 to 5 As shown, this embodiment provides a replacement fluid connector for a hemodialysis machine that can prevent the cap from detaching, including a seat plate 2 and a cap 1, as well as a pull rod 3 and a locking spring 4 fitted on the pull rod 3, and also includes an anti-detachment bracket 5 installed on the seat plate 2;

[0042] One end of the pull rod 3 is connected to the seat plate 2, and the other end passes through the seat plate 2 and the anti-slip bracket 5. The side wall of the pull rod 3 is provided with a slot 301, and the anti-slip bracket 5 is provided with an elastic pressing component 7 that is partially inserted into the slot 301.

[0043] This embodiment, by setting a pull rod 3 with a slot 301 and a top-pressing component located in the anti-detachment frame 5, ensures that under normal conditions, the pull rod 3 is locked by the top-pressing component and will not be pulled by the cap 1 simply due to excessive liquid pressure. This solves the problem that the cap 1 of the replacement fluid connector is easily pushed up when the liquid pressure is too high. When it is necessary to pull and rotate the cap 1, since the elastic top-pressing component 7 has a certain elasticity, the operator only needs to apply a large pulling force to overcome the pulling force of the top-pressing spring and the elastic top-pressing component 7 to pull the cap 1.

[0044] Therefore, the core of this embodiment is to apply a pressure to the pull rod 3 along its radial direction, pressing it into the groove 301 of the pull rod 3, so that the pull rod 3 will not be pulled due to excessive liquid pressure, nor will it cause the operator to be unable to pull the cover 1 and the pull rod 3 after applying a large pulling force, thereby effectively solving the problems of the prior art.

[0045] Specifically, in this embodiment, such as Figures 1 to 3 As shown, the anti-detachment frame 5 includes an integrated mounting part 51, a connecting part 52, and a limiting part 53;

[0046] The anti-slip bracket 5 is fixedly connected to the base plate 2 via the mounting part 51;

[0047] The connecting part 52 is arranged parallel to the tie rod 3;

[0048] The limiting part 53 is located at the end of the connecting part 52 away from the mounting part 51, and the limiting part 53 is provided with a mounting hole 531 perpendicular to the connecting part 52;

[0049] The pull rod 3 is provided to pass through the mounting holes 531 of the seat plate 2, the mounting part 51 and the limiting part 53 in sequence, and the slot 301 on the pull rod 3 is provided facing the mounting hole 531;

[0050] The elastic pressing component 7 is disposed in the mounting hole 531 of the limiting part 53.

[0051] Specifically, in this embodiment, such as Figure 4 As shown, the elastic pressing assembly 7 includes an elastic element 71 and a ball 72 disposed in the mounting hole 531. One end of the elastic element 71 presses against the ball 72, and the other end presses against the limiting part 53. The end of the ball 72 away from the elastic element 71 presses against the pull rod 3.

[0052] The pressing direction of the elastic element 71 is parallel to the axial direction of the slot 301. The elastic pressing assembly 7 includes balls 72, so that the pull rod 3 will not be completely jammed when the operator pulls it.

[0053] Specifically, in this embodiment, the elastic element 71 is an air cushion; in some embodiments, the elastic element 71 may also be a spring.

[0054] Specifically, in this embodiment, the opening shape of the slot 301 is circular and the cross-sectional shape is arc-shaped to prevent the ball 72 from being completely jammed. At the same time, the elastic pressing component 7 can also provide a certain auxiliary restraint effect for the pull rod 3.

[0055] Specifically, in this embodiment, such as Figure 3 and Figure 4 As shown, the tie rod 3 is also provided with an mounting ring groove 302;

[0056] It also includes a blocking assembly 8 installed on the mounting ring groove 302, with one end of the pressure spring pressing against the mounting part 51 or the seat plate 2, and the other end pressing against the blocking assembly 8.

[0057] Specifically, in this embodiment, such as Figure 3 and Figure 4 As shown, the blocking assembly 8 includes an annular retaining ring 81 fitted onto and slidably connected to the pull rod 3, and an open retaining ring 82 installed in the mounting ring groove 302;

[0058] The inner diameter of the annular retaining ring 81 is smaller than the outer diameter of the open retaining ring 82. Both the open retaining ring 82 and the annular retaining ring 81 are existing structures. By setting a blocking assembly 8 composed of the open retaining ring 82 and the annular retaining ring 81 on the pull rod 3, the installation of the pull rod 3 can be avoided. At the same time, a limiting structure that provides support for the top compression spring can be formed on the pull rod 3.

[0059] Specifically, in this embodiment, the mounting part 51 of the anti-slip bracket 5 is detachably fixed to the seat plate 2 by bolts, which facilitates the installation and removal of the anti-slip bracket 5.

[0060] Specifically, in this embodiment, the pull rod 3 extends outward from one end of the anti-detachment frame 5 with an extension section 31. The length of the extension section 31 is greater than or equal to the height of the cover 1, which can minimize the risk of the pull rod 3 moving away from the cover 1 from the limiting part 53 of the anti-detachment frame 5.

[0061] Specifically, in this embodiment, a connecting nozzle assembly 6 is also included, which is an existing structure and will not be described in detail here.

[0062] It is understood that the above embodiments are merely exemplary implementations used to illustrate the principles of this utility model, and the utility model is not limited thereto. For those skilled in the art, various modifications and improvements can be made without departing from the spirit and essence of this utility model, and these modifications and improvements are also considered to be within the protection scope of this utility model.

Claims

1. A replacement fluid connector for a hemodialysis machine with an anti-cap detachment feature, comprising a base plate (2) and a cap (1), a pull rod (3) and a locking spring (4) fitted onto the pull rod (3), characterized in that, It also includes an anti-slip bracket (5) installed on the seat plate (2); One end of the pull rod (3) is connected to the seat plate (2), and the other end passes through the seat plate (2) and the anti-slip frame (5). The side wall of the pull rod (3) is provided with a slot (301), and the anti-slip frame (5) is provided with an elastic pressing component (7) that is partially inserted into the slot (301).

2. The replacement fluid connector for a hemodialysis machine with anti-cap detachment protection according to claim 1, characterized in that, The anti-detachment frame (5) includes an integrated mounting part (51), a connecting part (52), and a limiting part (53); The anti-slip bracket (5) is fixedly connected to the seat plate (2) via the mounting part (51); The connecting part (52) is set parallel to the tie rod (3); The limiting part (53) is located at the end of the connecting part (52) away from the mounting part (51), and the limiting part (53) is provided with a mounting hole (531) perpendicular to the connecting part (52); The pull rod (3) is provided to pass through the mounting holes (531) of the seat plate (2), the mounting part (51) and the limiting part (53) in sequence, and the slot (301) on the pull rod (3) is provided facing the mounting hole (531); The elastic pressing component (7) is disposed in the mounting hole (531) of the limiting part (53).

3. A replacement fluid connector for a hemodialysis machine with an anti-cap detachment feature as described in claim 2, characterized in that, The elastic pressing assembly (7) includes an elastic element (71) and a ball (72) disposed in the mounting hole (531). One end of the elastic element (71) presses against the ball (72), and the other end presses against the limiting part (53). The end of the ball (72) away from the elastic element (71) presses against the pull rod (3). The pressing direction of the elastic element (71) is parallel to the axial direction of the slot (301).

4. A replacement fluid connector for a hemodialysis machine with an anti-detachment cap as described in claim 3, characterized in that, The elastic element (71) is a spring or an air cushion.

5. A replacement fluid connector for a hemodialysis machine with an anti-detachment cap as described in claim 3, characterized in that, The slot (301) has a circular opening and an arc-shaped cross-section.

6. A replacement fluid connector for a hemodialysis machine with an anti-detachment cap as described in claim 2, characterized in that, The tie rod (3) is also provided with an mounting ring groove (302); It also includes a blocking assembly (8) installed on the mounting ring groove (302), with one end of the pressure spring pressing against the mounting part (51) or the seat plate (2) and the other end pressing against the blocking assembly (8).

7. A replacement fluid connector for a hemodialysis machine with an anti-detachment cap as described in claim 6, characterized in that, The blocking assembly (8) includes an annular retaining ring (81) fitted onto and slidably connected to the pull rod (3), and an open retaining ring (82) installed in the mounting ring groove (302); The inner diameter of the annular retaining ring (81) is smaller than the outer diameter of the open retaining ring (82).

8. A replacement fluid connector for a hemodialysis machine with an anti-detachment cap as described in claim 1, characterized in that, The mounting part (51) of the anti-slip bracket (5) is detachably fixed to the seat plate (2) by bolts.

9. A replacement fluid connector for a hemodialysis machine with an anti-detachment cap as described in claim 1, characterized in that, The pull rod (3) extends outward from one end of the anti-detachment frame (5) with an extension section (31), the length of which is greater than or equal to the height of the cover (1).

10. A replacement fluid connector for a hemodialysis machine with anti-cap detachment protection according to claim 1, characterized in that, It also includes a connecting nozzle assembly (6) mounted on the base plate (2).

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