Self-stopping liquid structure of drip chamber of infusion device

Abstract

This utility model discloses a self-stopping structure for the drip chamber of an infusion set, including a base at the bottom of the drip chamber and a float valve cavity assembly slidably mounted on the inner wall of the base. A T-shaped block is provided on the outer wall of the float valve cavity assembly, and a slide rail connected to the T-shaped block is provided on the inner side wall of the base. A heat-fused protrusion is provided at the top of the slide rail. An outlet is provided in the base, with its top protruding from the inner bottom surface of the base and contacting the bottom of the float valve cavity assembly. This utility model, by setting up a slide rail structure, makes the up-and-down movement of the float valve cavity assembly smoother and more stable, avoiding the phenomenon of the float valve element not stopping or failing to float due to tilting or jamming. The heat-fused protrusion blocks the T-shaped block, preventing the float valve cavity assembly from detaching from the slide rail.

Description

Technical Field

[0001] This utility model relates to the field of medical device technology, specifically to a self-stopping structure for the drip chamber of an infusion set. Background Technology

[0002] While some infusion sets currently on the market possess certain automatic stop functions, their reliability and stability still need improvement. For example, in some self-stopping infusion sets, the float valve lacks a sliding rail, making it prone to tilting or jamming during its up-and-down movement. This results in the inability to stop the infusion or prevents it from floating again after stopping the infusion. Consequently, it not only fails to achieve the stopping function but also prevents the infusion of fluids after the bottle has been changed. Utility Model Content

[0003] Based on this, the purpose of this utility model is to provide a self-stopping structure for the drip chamber of an infusion set. By setting a slide rail structure, the up and down movement of the float valve cavity assembly is smoother and more stable, avoiding the phenomenon that the float valve element does not stop dispensing or does not float due to the float valve element being tilted or stuck.

[0004] A self-stopping structure for the drip chamber of an infusion set includes a base disposed at the bottom of the drip chamber and a float valve cavity assembly slidably disposed on the inner wall of the base;

[0005] The outer wall of the float valve cavity assembly is provided with a T-shaped block, and the inner side wall of the base is provided with a slide rail connected to the T-shaped block. The top of the slide rail is provided with a hot melt protrusion.

[0006] The base is provided with a liquid outlet, the top of which protrudes from the inner bottom surface of the base and contacts the bottom of the float valve cavity assembly.

[0007] Preferably, the float valve cavity assembly includes a float valve element and a silicone sheet that contacts the top of the outlet.

[0008] The T-shaped block is located on the outer wall of the float valve element, and the bottom of the float valve element is recessed to form a cavity. The bottom wall of the cavity is welded to the silicone sheet by a hot riveting method.

[0009] Preferably, the edge of the silicone sheet is provided with an outwardly protruding ring, and the bottom of the cavity wall is grooved, the groove being welded to the outwardly protruding ring.

[0010] Preferably, the outer wall of the groove extends downward and bends to form a hot-riveting part, which abuts against the silicone sheet.

[0011] Preferably, the bottom of the cavity wall is provided with a protrusion, which is welded to the silicone sheet.

[0012] Preferably, the top surface of the float valve element has a conical structure.

[0013] Preferably, the silicone sheet has a thickness of 0.05 to 0.3 mm and is made of silicone or latex.

[0014] Preferably, the outer wall of the base includes an inlet portion and an adhesive portion connected together, the adhesive portion being bonded to the inner wall of the dripping bucket.

[0015] Preferably, the bottom of the adhesive portion is provided with a limiting portion, which contacts the bottom of the dripping bucket.

[0016] Compared with the prior art, the beneficial effects of this utility model are as follows:

[0017] By setting up a slide rail structure, the up and down movement of the float valve cavity assembly is made smoother and more stable, avoiding the phenomenon that the float valve element does not stop liquid or does not float due to the float valve element being tilted or stuck.

[0018] The T-shaped block is blocked by the hot-melt protrusions to prevent the float valve cavity assembly from detaching from the slide rail. Attached Figure Description

[0019] Figure 1 This is a cross-sectional view of the self-stopping drip structure of the infusion set in this utility model;

[0020] Figure 2 This is an exploded view of the self-stopping drip structure of the infusion set in this utility model;

[0021] Figure 3 This is a partial sectional view of the float valve cavity assembly mounted on the base in this utility model.

[0022] Explanation of key component symbols:

[0023] 10-Drip container; 11-Base; 111-Slide rail; 112-Hot melt protrusion; 113-Outlet; 114-Inlet; 115-Adhesive part; 116-Limiting part; 12-Float valve cavity assembly; 121-T-block; 122-Float valve element; 1221-Cavity; 1222-Hot riveting part; 123-Silicone sheet; 1231-Outer convex ring; 13-Drip tube.

[0024] The following detailed description, in conjunction with the accompanying drawings, will further illustrate this utility model. Detailed Implementation

[0025] The following description is intended to disclose the present invention so that those skilled in the art can implement it. The preferred embodiments described below are merely examples, and other obvious variations will occur to those skilled in the art.

[0026] Please see Figures 1 to 3The present invention provides a self-stopping structure for the drip chamber of an infusion set, comprising a base 11 disposed at the bottom of the drip chamber 10, and a float valve cavity assembly 12 slidably disposed on the inner wall of the base 11.

[0027] The outer wall of the float valve cavity assembly 12 is provided with a T-shaped block 121, and the inner side wall of the base 11 is provided with a slide rail 111 connected to the T-shaped block 121. The top of the slide rail 111 is provided with a hot melt protrusion 112.

[0028] The base 11 is provided with a liquid outlet 113, the top of which protrudes from the inner bottom surface of the base 11 and contacts the bottom of the float valve cavity assembly 12.

[0029] It should be noted that in this invention, the T-shaped block 121 slides up and down along the slide rail 111, but cannot slide left and right or forward and backward, and the number of T-shaped blocks 121 and slide rails 111 can be 1 to 4. After the T-shaped block 121 is installed in the slide rail 111, the plastic at the top of the slide rail 111 is melted by heating or ultrasonic process to form the hot-melt protrusion 112, which can prevent the T-shaped block 121 from sliding out of the slide rail 111.

[0030] Specifically, the liquid falls from the dropper 13 and down through the gap between the float valve cavity assembly 12 and the base 11 to the bottom of the base 11. As the liquid volume increases, the float valve cavity assembly 12 has a cavity inside, which causes the liquid to generate a large buoyancy force on the float valve cavity assembly 12. Therefore, the float valve cavity assembly 12 is floated up until the T-shaped block 121 is blocked by the hot melt protrusion 112. The liquid can then flow out through the outlet 113 and enter the human body.

[0031] When the liquid in the drip chamber is completely poured, the float valve cavity assembly 12 loses buoyancy and then falls due to its own weight. The bottom of the float valve cavity assembly 12 forms a seal with the liquid outlet 113, thereby preventing air from entering the liquid outlet 113. The liquid level stops at the bottom of the float valve cavity assembly 12, achieving the self-stopping function.

[0032] When the infusion bottle is changed again, the floating valve cavity assembly 12 can float up again due to buoyancy, achieving the effect of unlimited infusion and cessation.

[0033] Please see Figures 1 to 3 In a preferred embodiment of the present invention, the float valve cavity assembly 12 includes a float valve element 122 and a silicone sheet 123 that contacts the top of the liquid outlet 113.

[0034] The T-shaped block 121 is located on the outer wall of the float valve element 122. The bottom of the float valve element 122 is recessed to form a cavity 1221. The bottom wall of the cavity 1221 is welded to the silicone sheet 123 by heat riveting. After welding and sealing, the cavity 1221 is less prone to dust adsorption due to static electricity. At the same time, by setting the cavity structure, the buoyancy of the float valve cavity assembly 12 can be increased.

[0035] Please see Figures 1 to 3 In a preferred embodiment of this utility model, the edge of the silicone sheet 123 is provided with an outer protruding ring 1231, and the bottom of the cavity wall of the cavity 1221 is grooved. The groove is welded to the outer protruding ring 1231. The welding area is increased by the groove and the outer protruding ring 1231 to prevent it from falling off.

[0036] Furthermore, the outer wall of the groove extends downward and bends to form a hot riveting part 1222, which abuts against the silicone sheet 123, thereby increasing the connection strength and preventing it from falling off.

[0037] In another preferred embodiment of the present invention, a protrusion is provided at the bottom of the cavity wall of the cavity 1221. The protrusion is welded to the silicone sheet 123. The protrusion increases the welding area between the two and prevents them from falling off.

[0038] In a preferred embodiment of this utility model, the top surface of the float valve element 122 is a conical structure. When liquid falls from the dropper 13, it faces the top of the conical structure, and then the liquid slides down along the conical surface, falling from the gap between the float valve element 122 and the base 11 to the bottom of the base 11.

[0039] In another preferred embodiment of the present invention, the thickness of the silicone sheet 123 is 0.05-0.3 mm, and it is made of silicone or latex.

[0040] Please see Figures 1 to 3 In a preferred embodiment of this utility model, the outer wall of the base 11 includes a connecting inlet portion 114 and an adhesive portion 115, wherein the adhesive portion 114 is bonded to the inner wall of the dripping funnel 10. Specifically, the top outer wall of the inlet portion 114 has a conical structure to facilitate the dripping funnel 10 being fitted onto the base 11 when bonded with adhesive.

[0041] Furthermore, the bottom of the adhesive part 115 is provided with a limiting part 116, which contacts the bottom of the dripping bucket 10 and is positioned by the limiting part 116 so that the dripping bucket 10 can be bonded to the adhesive part 115.

[0042] Furthermore, the dripping bucket 10 is blow-molded from a soft polymer material after extrusion, and the material includes, but is not limited to, PVC, TPU, TPE, and PE.

[0043] In summary, by setting up a slide rail structure, this utility model makes the up-and-down movement of the float valve cavity assembly 12 smoother and more stable, avoiding the phenomenon that the float valve element 122 does not stop liquid or does not float due to tilting or jamming; by using the hot melt protrusion 112 to block the T-shaped block 121, the float valve cavity assembly 12 is prevented from detaching from the slide rail.

[0044] The foregoing has shown and described the basic principles, main features, and advantages of this utility model. Those skilled in the art should understand that this utility model is not limited to the above embodiments. The embodiments and descriptions in the specification are merely principles of this utility model. Various changes and modifications can be made to this utility model without departing from its spirit and scope, and all such changes and modifications fall within the scope of the claimed utility model. The scope of protection of this utility model is defined by the appended claims and their equivalents.

Claims

1. A drip chamber self-stopping liquid structure of an infusion set, characterized by, It includes a base located at the bottom of the drip chamber, and a float valve cavity assembly that is slidably disposed on the inner wall of the base; The outer wall of the float valve cavity assembly is provided with a T-shaped block, and the inner side wall of the base is provided with a slide rail connected to the T-shaped block. The top of the slide rail is provided with a hot melt protrusion. The base is provided with a liquid outlet, the top of which protrudes from the inner bottom surface of the base and contacts the bottom of the float valve cavity assembly.

2. The drip chamber self-stopping liquid structure of the infusion set according to claim 1, wherein, The float valve cavity assembly includes a float valve element and a silicone sheet that contacts the top of the outlet. The T-shaped block is located on the outer wall of the float valve element, and the bottom of the float valve element is recessed to form a cavity. The bottom wall of the cavity is welded to the silicone sheet by a hot riveting method.

3. The drip chamber self-stopping liquid structure of the infusion set according to claim 2, wherein, The edge of the silicone sheet is provided with an outward protruding ring, and the bottom of the cavity wall is grooved, which is welded to the outward protruding ring.

4. The drip chamber self-stopping liquid structure of the infusion set according to claim 3, wherein The outer wall of the groove extends downward and bends to form a hot-riveting part, which abuts against the silicone sheet.

5. The drip chamber self-stopping liquid structure of the infusion set according to claim 2, wherein, The cavity wall has a protrusion at the bottom, and the protrusion is welded to the silicone sheet.

6. The drip chamber self-stopping liquid structure of the infusion set according to claim 2, wherein The top surface of the float valve element is a conical structure.

7. The self-stopping drip structure of the infusion set according to claim 2, characterized in that, The silicone sheet has a thickness of 0.05 to 0.3 mm and is made of silicone or latex.

8. The drip chamber self-stopping structure of the infusion set according to any one of claims 1 to 7, characterized in that, The outer wall of the base includes a connecting inlet and an adhesive part, the adhesive part being bonded to the inner wall of the dripping bucket.

9. The drip chamber self-stopping liquid structure of the infusion set according to claim 8, wherein, The bottom of the adhesive part is provided with a limiting part, which contacts the bottom of the dripping bucket.

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