Liquid stopping clamp device for indwelling needle

Abstract

The invention discloses an indwelling needle liquid stopping clamp device, and belongs to the technical field of medical instruments, the indwelling needle liquid stopping clamp device comprises an indwelling needle body and an infusion pipeline communicated with the indwelling needle body, a first corrugated telescopic section and a second corrugated telescopic section are arranged on the infusion pipeline at intervals, and the first corrugated telescopic section is located on the side close to a needle head of the indwelling needle body; a plurality of first liquid stopping pieces and second liquid stopping pieces are fixedly arranged on the second corrugated telescopic section and arranged on the two sides of the second corrugated telescopic section in a staggered and spaced mode. The inner ends of the first liquid stopping sheet and the second liquid stopping sheet extend into an inner side channel of the second corrugated telescopic section and are separated from the inner wall of the second corrugated telescopic section to form holes; a clamping assembly and an elastic supporting assembly are installed on the second corrugated telescopic section at the same time. According to the device, the liquid stopping clamp can be conveniently closed and opened, an infusion pipeline cannot be damaged, and the infusion process is smoother.

Description

Technical Field

[0001] The invention belongs to the technical field of medical devices, and in particular relates to a liquid-stopping clamp device for an indwelling needle. Background Art

[0002] The indwelling needle stop clamp is an important component of the indwelling needle device. Its main function is to control the flow of liquid in the indwelling needle infusion pipeline. When the infusion needs to be suspended, closing the stop clamp can prevent blood from flowing back into the infusion tube, and also prevent the liquid in the infusion bottle from continuing to be infused. The existing infusion stop clamp uses a mechanical method to act on the infusion pipeline, forcing the infusion pipeline to deform, thereby blocking the flow channel. This method is likely to cause permanent deformation of the infusion pipeline. In some cases, the flow area of ​​the infusion pipeline is not easy to return to the state before clamping, and there will be problems with poor infusion after releasing the stop clamp. Summary of the invention

[0003] In view of this, an object of the present invention is to provide an indwelling needle liquid stop clamp device, which can facilitate the closing and opening of the liquid stop clamp and will not cause damage to the infusion pipeline, making the infusion process smoother.

[0004] In order to achieve the above object, the present invention provides the following technical solutions: The present invention discloses a liquid-stopping clamp device for an indwelling needle, comprising an indwelling needle body and an infusion pipeline connected to the indwelling needle body, wherein a first corrugated telescopic section and a second corrugated telescopic section are arranged at intervals on the infusion pipeline, the first corrugated telescopic section is located on the side where the needle head of the indwelling needle body is located; a plurality of first liquid-stopping plates and a second liquid-stopping plate are fixedly arranged on the second corrugated telescopic section, the first liquid-stopping plates and the second liquid-stopping plates are staggered and arranged on both sides of the second corrugated telescopic section, the inner ends of the first liquid-stopping plates and the second liquid-stopping plates are both extended into the inner channel of the second corrugated telescopic section and are separated from the inner wall of the second corrugated telescopic section by a hole, the combined projection of the first liquid-stopping plates and the second liquid-stopping plates in the axial direction can cover the cross-section of the inner channel of the second corrugated telescopic section; a clamping assembly and an elastic support assembly are simultaneously installed on the second corrugated telescopic section, the clamping assembly is used to clamp the first liquid-stopping plate and the second liquid-stopping plate in the axial direction, and the elastic support assembly is used to separate the first liquid-stopping plate and the second liquid-stopping plate in the axial direction when the clamping assembly is released.

[0005] Furthermore, the clamping assembly includes a fixing ring, a screw, a guide rod, a clamping ring and a nut. The fixing ring is fixed at the end of the second corrugated telescopic section away from the needle head. The screw and the guide rod are installed on the fixing ring parallel to its axis. The first liquid-stopping plate and the second liquid-stopping plate are both provided with through holes for the screw and the guide rod to pass through. The clamping ring is slidably arranged on the outside of the guide rod. The screw is connected to the nut after passing through the clamping ring.

[0006] Furthermore, the elastic support assembly includes support springs, and support springs are installed between two adjacent first liquid-stopping plates, between two adjacent second liquid-stopping plates, between the first liquid-stopping plate and the fixing ring, and between the second liquid-stopping plate and the clamping ring.

[0007] Furthermore, in the axial direction of the support spring, the diameter of the support spring is in a spirally contracted shape.

[0008] Furthermore, the clamping ring is coaxially and integrally connected to an extension tube, the inner side of the extension tube is threadedly connected to a rotating tube, an annular groove is provided on the inner side of the rotating tube, an annular protrusion that rotatably cooperates with the annular groove is fixed to the outer side of the infusion pipe, an indicator mark is fixed to the outer end of the rotating tube, and a mark is circumferentially arranged on the outer side of the infusion pipe corresponding to the indicator mark.

[0009] Furthermore, the first liquid-stopping plate and the second liquid-stopping plate both include an elastic plate body, in which a plurality of elastic support plates are evenly installed at intervals in the horizontal direction, and the elastic support plates extend in the vertical direction.

[0010] Furthermore, the elastic support sheet is in the shape of an elongated strip, a slot for installing the elastic support sheet is provided at the lower end of the sheet body, the elastic support sheet is inserted into the slot, and at least a portion of the elastic support sheet extends to the outside of the second corrugated expansion section.

[0011] Furthermore, for two adjacent first liquid-stopping sheets and second liquid-stopping sheets, the elastic supporting sheets on the first liquid-stopping sheets and the elastic supporting sheets on the second liquid-stopping sheets are staggered with each other in the transverse direction.

[0012] The beneficial effects of the present invention are: The present invention discloses a liquid-stopping clamp device for an indwelling needle. When liquid stopping is required, the first liquid-stopping sheet and the second liquid-stopping sheet are pressed against each other along the axial direction. The first liquid-stopping sheet and the second liquid-stopping sheet are staggered and overlapped, and the inner channel section of the second corrugated telescopic section can be covered, thereby achieving liquid stopping. When liquid circulation is required, the elastic support component is used to separate the first liquid-stopping sheet and the second liquid-stopping sheet along the axial direction when the clamping component is released. In the above manner, the device clamps and releases without damaging the pipeline, thereby avoiding problems such as permanent deformation caused by direct clamping of the infusion pipeline, and increasing the stability during infusion.

[0013] In the device disclosed in the present invention, the state of stopping liquid or infusing liquid can be achieved by axially clamping and loosening the liquid-stopping sheet. The device is simple, has no direct impact on the infusion pipeline, and the subsequent infusion is smoother.

[0014] In the device of the present invention, by simultaneously providing the first corrugated telescopic section, the telescopic change of the second corrugated telescopic section can be adapted, and no pulling will be caused on the infusion pipeline during telescopic movement, which can facilitate operation and ensure the comfort of the patient during infusion.

[0015] Other advantages, objectives and features of the present invention will be described in the following description and will be apparent to those skilled in the art to some extent, or those skilled in the art may be taught from the practice of the present invention. The objectives and other advantages of the present invention may be realized and obtained through the following description. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] In order to make the purpose, technical solution and beneficial effects of the present invention clearer, the present invention provides the following drawings for illustration: Figure 1 It is a structural schematic diagram of the liquid-stop clamp device of the present invention; Figure 2 It is a schematic diagram of the structure when the second corrugated expansion section is extended; Figure 3 It is a schematic diagram of the structure when the second corrugated expansion section contracts; Figure 4 is a schematic diagram of the coordination between the first liquid-stopping piece and the second liquid-stopping piece; Figure 5 is a schematic diagram of the structure of the rotating tube; Figure 6 for Figure 2 Enlarged view of point A in the middle.

[0017] The markings in the accompanying drawings are as follows: indwelling needle body 1, infusion pipeline 2, first corrugated telescopic section 3, second corrugated telescopic section 4, first liquid-stopping plate 5, second liquid-stopping plate 6, fixing ring 7, screw 8, guide rod 9, clamping ring 10, nut 11, through hole 12, support spring 13, extension tube 14, rotating tube 15, annular groove 16, annular protrusion 17, indicator mark 18, sheet body 19, elastic support sheet 20. DETAILED DESCRIPTION

[0018] like Figures 1 to 6 As shown, the present invention discloses an indwelling needle liquid-stopping clamp device, comprising an indwelling needle body 1, and an infusion pipe 2 connected to the indwelling needle body 1, on which the infusion pipe 2 is provided a first corrugated telescopic section 3 and a second corrugated telescopic section 4 at intervals, the first corrugated telescopic section 3 is located on the side close to the needle head of the indwelling needle body 1, and the second corrugated telescopic section 4 is located on the side away from the needle head of the indwelling needle body 1, and both the first corrugated telescopic section 3 and the second corrugated telescopic section 4 can be telescoped along the axial direction.

[0019] Among them, in the embodiment of the present invention, three first liquid-stopping sheets 5 and three second liquid-stopping sheets 6 are fixedly arranged on the second corrugated expansion section 4, and the first liquid-stopping sheets 5 and the second liquid-stopping sheets 6 are staggered and arranged on both sides of the second corrugated expansion section 4. Taking the figure as an example, three first liquid-stopping sheets 5 are arranged at intervals on the upper side of the second corrugated expansion section 4, and three second liquid-stopping sheets 6 are arranged at intervals on the lower side of the second corrugated expansion section 4. A second liquid-stopping sheet 6 is arranged between two adjacent first liquid-stopping sheets 5, and of course, a first liquid-stopping sheet 5 is arranged between two adjacent second liquid-stopping sheets 6. They are arranged in an intermittent and staggered manner.

[0020] The liquid-stopping piece is rectangular as a whole, and the inner ends of the first liquid-stopping piece 5 and the second liquid-stopping piece 6 both extend into the inner channel of the second corrugated expansion section 4 and are separated from the inner wall of the second corrugated expansion section 4 to form a hole. The lower side of the upper first liquid-stopping piece 5 extends into the second corrugated expansion section 4 and at least exceeds the central axis of the second corrugated expansion section 4. Similarly, the upper side of the lower second liquid-stopping piece 6 extends into the second corrugated expansion section 4 and at least exceeds the central axis of the second corrugated expansion section 4. In this way, the axial combined projection of the first liquid-stopping piece 5 and the second liquid-stopping piece 6 can cover the inner channel cross-section of the second corrugated expansion section 4, that is, when each block of the first liquid-stopping piece 5 and the second liquid-stopping piece 6 is axially compressed and overlapped, the channel of the second corrugated expansion section 4 can be closed to play a role in stopping liquid.

[0021] Furthermore, the present invention simultaneously installs a clamping assembly and an elastic support assembly on the second corrugated expansion section 4, the clamping assembly is used to clamp the first liquid-stopping plate 5 and the second liquid-stopping plate 6 in the axial direction, and the elastic support assembly is used to separate the first liquid-stopping plate 5 and the second liquid-stopping plate 6 in the axial direction when the clamping assembly is released. During use of the device, when stopping liquid, the clamping assembly is used to clamp the first liquid-stopping plate 5 and the second liquid-stopping plate 6 in the axial direction, thereby closing the channel of the second corrugated expansion section 4. When liquid circulation is required, the elastic support assembly is used to separate the first liquid-stopping plate 5 and the second liquid-stopping plate 6 in the axial direction when the clamping assembly is released. In the above manner, the device can be clamped and released without damaging the pipeline, thereby avoiding problems such as permanent deformation caused by direct clamping of the infusion pipeline 2, and increasing stability during infusion.

[0022] In this embodiment, the clamping assembly includes a fixing ring 7, a screw 8, a guide rod 9, a clamping ring 10 and a nut 11. The fixing ring 7 is fixed to the end of the second corrugated telescopic section 4 away from the needle. The fixing ring 7 is coaxially fixed to the outside of the infusion pipe 2. The fixing ring 7 is parallel to its axis and is provided with a screw 8 and a guide rod 9. The screw 8 and the guide rod 9 extend toward the side where the needle is located. The first liquid-stopping sheet 5 and the second liquid-stopping sheet 6 are provided with a through hole 12 for the screw 8 and the guide rod 9 to pass through. The clamping ring 10 is slidably arranged on the outside of the guide rod 9. The screw 8 passes through the clamping ring 10 and is connected to the nut 11. The guide rod 9 mainly plays a guiding role. When the liquid-stopping sheet needs to be compressed, the nut 11 can be rotated. Under the cooperation of the thread, the nut 11 can drive the clamping ring 10 to move toward the side away from the needle, thereby gradually compressing the liquid-stopping sheets together. The above control method is simple and convenient to operate.

[0023] In this embodiment, the elastic support assembly includes a support spring 13, and the support spring 13 is installed between two adjacent first liquid-stopping sheets 5, between two adjacent second liquid-stopping sheets 6, between the first liquid-stopping sheet 5 and the fixing ring 7, and between the second liquid-stopping sheet 6 and the clamping ring 10. By providing the support spring 13, when liquid circulation is required, the support spring 13 can timely separate the first liquid-stopping sheet 5 and the second liquid-stopping sheet 6 along the axial direction when the clamping assembly is released, so that the two ends of the support spring 13 can return to the initial interval, so that the infusion process can be smoother.

[0024] In this embodiment, in the axial direction of the support spring 13, the diameter of the support spring 13 is in a spiral contraction shape, which can reduce the space occupied by the support spring 13 when it is compressed, allowing two adjacent liquid-stopping sheets to fit more closely, thereby preventing the flow of liquid.

[0025] In this embodiment, the clamping ring 10 is coaxially connected to the extension tube 14, the inner side of the extension tube 14 is threadedly connected to the rotating tube 15, the inner side of the rotating tube 15 is provided with an annular groove 16, the outer side of the infusion pipe 2 is fixed with an annular protrusion 17 that rotates with the annular groove 16, the outer end of the rotating tube 15 is fixed with an indicator mark 18, and a mark is provided along the circumferential direction on the outer side of the infusion pipe 2 corresponding to the indicator mark 18. By providing the rotating tube 15, when the clamping ring 10 is displaced, the rotating tube 15 can be driven to rotate, and after the rotating tube 15 rotates, the indicator mark 18 is aligned with different marks, and the marks correspond to the contraction degree of the second corrugated expansion section 4, thereby displaying different compression degrees, which is convenient for operators to operate and identify.

[0026] In this embodiment, the first liquid-stopping sheet 5 and the second liquid-stopping sheet 6 both include an elastic sheet body 19, so that the fitting between the liquid-stopping sheets can have better sealing performance. A plurality of elastic support sheets 20 are evenly installed in the sheet body 19 along the horizontal direction, and the elastic support sheets 20 extend vertically. The elastic support sheets 20 have a certain elastic pre-tightening force, so that the liquid-stopping sheets can be appropriately deformed after being pressed. Under the pre-stress of the deformation, the sealing effect between two adjacent liquid-stopping sheets can be increased.

[0027] In this embodiment, the elastic support sheet 20 is in the shape of a long strip, and a slot for installing the elastic support sheet 20 is opened at the lower end of the sheet body 19. The elastic support sheet 20 is inserted into the slot, and at least part of the elastic support sheet 20 extends to the outside of the second corrugated expansion section 4, which can increase the deformation recovery ability of the liquid-stop sheet after being loosened.

[0028] In this embodiment, for the two adjacent first liquid-stopping sheets 5 and the second liquid-stopping sheets 6, the elastic support sheets 20 on the first liquid-stopping sheets 5 and the elastic support sheets 20 on the second liquid-stopping sheets 6 are staggered laterally, which can increase the sealing ability of the first liquid-stopping sheets 5 and the second liquid-stopping sheets 6 after they are tightly fitted.

[0029] Finally, it should be noted that the above preferred embodiments are only used to illustrate the technical solutions of the present invention rather than to limit it. Although the present invention has been described in detail through the above preferred embodiments, those skilled in the art should understand that various changes can be made in form and details without departing from the scope defined by the claims of the present invention.

Claims

1. A fluid-stopping clamp device for an indwelling needle, comprising an indwelling needle body and an infusion pipeline connected to the indwelling needle body, characterized in that: The infusion pipeline is provided with a first corrugated expansion section and a second corrugated expansion section at intervals, the first corrugated expansion section is located on the side where the needle head of the indwelling needle body is located; the second corrugated expansion section is fixedly provided with a plurality of first liquid-stopping plates and a second liquid-stopping plate, the first liquid-stopping plates and the second liquid-stopping plates are staggered and arranged on both sides of the second corrugated expansion section, the inner ends of the first liquid-stopping plates and the second liquid-stopping plates are both extended into the inner channel of the second corrugated expansion section and are separated from the inner wall of the second corrugated expansion section by a hole, the axial combined projection of the first liquid-stopping plate and the second liquid-stopping plate can cover the inner channel cross-section of the second corrugated expansion section; the second corrugated expansion section is simultaneously installed with a clamping assembly and an elastic support assembly, the clamping assembly is used to clamp the first liquid-stopping plate and the second liquid-stopping plate in the axial direction, and the elastic support assembly is used to separate the first liquid-stopping plate and the second liquid-stopping plate in the axial direction when the clamping assembly is released.

2. The indwelling needle liquid-stopping clamp device according to claim 1, characterized in that: The clamping assembly includes a fixing ring, a screw, a guide rod, a clamping ring and a nut. The fixing ring is fixed to the end of the second corrugated telescopic section away from the needle head. The screw and the guide rod are installed on the fixing ring parallel to its axis. The first liquid-stopping plate and the second liquid-stopping plate are both provided with through holes for the screw and the guide rod to pass through. The clamping ring is slidably arranged on the outside of the guide rod. The screw is connected to the nut after passing through the clamping ring.

3. The indwelling needle liquid-stopping clamp device according to claim 2, characterized in that: The elastic support assembly includes support springs, which are installed between two adjacent first liquid-stopping sheets, between two adjacent second liquid-stopping sheets, between the first liquid-stopping sheet and the fixing ring, and between the second liquid-stopping sheet and the clamping ring.

4. The indwelling needle liquid-stopping clamp device according to claim 3, characterized in that: In the axial direction of the support spring, the diameter of the support spring is in a spiral contraction shape.

5. The indwelling needle liquid-stopping clamp device according to claim 1, characterized in that: The clamping ring is coaxially and integrally connected to an extension tube, the inner side of the extension tube is threadedly connected to a rotating tube, an annular groove is provided on the inner side of the rotating tube, an annular protrusion rotatably matched with the annular groove is fixed to the outer side of the infusion pipe, an indicator mark is fixed to the outer end of the rotating tube, and a mark is circumferentially arranged on the outer side of the infusion pipe corresponding to the indicator mark.

6. The indwelling needle liquid-stopping clamp device according to any one of claims 1 to 5, characterized in that: The first liquid-stopping plate and the second liquid-stopping plate both include an elastic plate body, in which a plurality of elastic support plates are evenly installed at intervals in the horizontal direction, and the elastic support plates extend in the vertical direction.

7. The indwelling needle liquid-stopping clamp device according to claim 6, characterized in that: The elastic support sheet is in the shape of an elongated strip, and a slot for installing the elastic support sheet is provided at the lower end of the sheet body. The elastic support sheet is inserted into the slot, and at least part of the elastic support sheet extends to the outside of the second corrugated expansion section.

8. The indwelling needle liquid-stopping clamp device according to claim 7, characterized in that: For two adjacent first liquid-stopping sheets and second liquid-stopping sheets, the elastic supporting sheets on the first liquid-stopping sheets and the elastic supporting sheets on the second liquid-stopping sheets are staggered with each other in the transverse direction.

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