All-plastic self-suction quantitative suction pipe and injection molding structure thereof

Abstract

The utility model discloses an all-plastic self-suction quantitative suction pipe and an injection molding structure thereof. The all-plastic self-suction quantitative suction pipe comprises a top air bag, a breather pipe and a quantitative self-suction pipe, a traditional connecting structure and a traditional manufacturing technology are changed, the top air bag, the ventilation pipe and the quantitative self-suction pipe are integrally formed from top to bottom and are all made of hydrophilic materials, and therefore the quantitative self-suction pipe can automatically suck liquid, a glass capillary does not need to be inserted again, and the technology requirement is lowered. The product size stability is good, and large-scale efficient batch production can be realized; after injection molding, the upper end of the top air bag is open, so that core pulling can be carried out from the upper end of the top air bag, and finally, the upper end of the top air bag is sealed by hot melting, which is the key point of the design of the utility model, and the technical barrier that injection molding cannot be carried out in the prior art is overcome.

Description

Technical Field

[0001] The utility model relates to a fully plastic self-priming quantitative straw and an injection molding structure thereof. Background Art

[0002] At present, when collecting liquids in hospitals and other medical departments, a straw is needed to collect the liquid quantitatively. Figure 1 As shown, the existing liquid collection straw generally includes an air sac 91, a connecting tube 92, and a capillary 93. The connecting tube 92 is connected to the lower side of the air sac 91, and a capillary 93 is inserted at the lower end of the connecting tube 92. The capillary 93 is a glass tube, and an air hole 911 is opened on the air sac 91. In this way, the purpose of automatic liquid collection is achieved through the automatic liquid suction of the capillary 93. During the manufacturing process of the above structure, the air sac 91 and the connecting tube 92 are an integrated structure, which is formed by blow molding of a polymer material, and then a capillary 93 is inserted into the lower end of the connecting tube 92 by gluing. Since it is a trace amount of collection, the diameter of the capillary 93 is very thin, so the processing difficulty of the capillary 93 is relatively large, the process requirements are high, the yield is low, and there is a risk of breakage when the capillary 93 is inserted into the connecting tube 92, and the installation is relatively cumbersome. At the same time, the process of blow molding the air sac 91 and the connecting tube 92 as a whole has poor stability in product specifications. Utility Model Content

[0003] In view of the deficiencies of the above-mentioned prior art, the problem solved by the utility model is: to provide a fully plastic self-priming quantitative straw and its injection molding structure which is formed in one step, simple to manufacture, efficient, injection moldable, mass-producible, and has stable structural dimensions.

[0004] In order to solve the above problems, the technical solution adopted by the utility model is as follows:

[0005] A fully plastic self-priming quantitative suction tube comprises a top airbag, a vent tube and a quantitative self-priming tube; the upper end of the top airbag is sealed by hot melting; the lower end of the top airbag is connected to the upper end of the vent tube; a quantitative self-priming tube is fixedly passed through the lower end of the vent tube, and the quantitative self-priming tube is sealed around and connected to the lower end of the vent tube; the upper end of the quantitative self-priming tube extends to the inside of the lower end of the vent tube, the upper end face of the quantitative self-priming tube is higher than the lower end face below the inside of the vent tube, and an annular gap is left between the outer side around the upper end face of the quantitative self-priming tube and the surrounding side walls of the lower end of the vent tube; the top airbag, vent tube and quantitative self-priming tube are an integrally formed structure and are made of hydrophilic polymer material; the top airbag, vent tube and quantitative self-priming tube are made by injection molding; a vent hole is provided on the side of the top airbag.

[0006] Furthermore, the upper end surface of the quantitative self-priming tube is 1 to 5 mm higher than the lower end surface below the inside of the ventilation tube.

[0007] Furthermore, the top airbag has a flat structure.

[0008] Furthermore, a sealing convex edge is provided at the upper end of the top airbag; and anti-slip patterns are provided on the front and rear sides of the sealing convex edge.

[0009] Furthermore, the top airbag has a conical structure that is larger at the top and smaller at the bottom.

[0010] Furthermore, connecting wings are provided on both sides of the top airbag.

[0011] An injection molding structure of a fully plastic self-priming quantitative straw, wherein a plurality of the straws are arranged in a row and connected by connecting wings.

[0012] The beneficial effects of the utility model are as follows:

[0013] 1. The utility model changes the traditional connection structure and preparation process, and the top airbag, ventilation tube, and quantitative self-priming tube are integrally formed from top to bottom, and are all made of hydrophilic materials. In this way, the quantitative self-priming tube can automatically absorb liquid, and there is no need to insert a glass capillary, which reduces the process requirements. The utility model adopts an injection molding process, and the product has good dimensional stability and can be mass-produced on a large scale and efficiently. After injection molding, the upper end of the top airbag of the utility model is open, so the core can be pulled from the upper end of the top airbag, and finally the upper end of the top airbag is hot-melt sealed, which is also the design focus of the utility model, overcoming the technical barrier that the prior art cannot perform injection molding.

[0014] 2. The utility model extends the upper end of the quantitative self-priming tube to the inside of the lower end of the ventilation tube. The upper end surface of the quantitative self-priming tube is higher than the lower end surface below the inside of the ventilation tube. An annular gap is left between the outer side around the upper end surface of the quantitative self-priming tube and the side walls around the lower end of the inside of the ventilation tube. In this way, the upper end of the quantitative self-priming tube is separated from the inside of the ventilation tube. This design ensures that the quantitative self-priming tube will not continue to be sucked upward along the ventilation tube after automatically sucking the liquid, thereby achieving the purpose of precise suction.

[0015] 3. When the utility model collects liquid, as long as the lower end of the quantitative self-priming tube is tilted to contact the liquid, the liquid will automatically fill the quantitative self-priming tube, and then the thumb and index finger will cover the vent hole of the top air bag, and then squeeze the top air bag to discharge the collected liquid, which is convenient to use. BRIEF DESCRIPTION OF THE DRAWINGS

[0016] Figure 1 It is a structural schematic diagram of the prior art.

[0017] Figure 2 It is a schematic diagram of the longitudinal sectional structure of the utility model.

[0018] Figure 3 It is a schematic diagram of the external structure of the utility model.

[0019] Figure 4 For this utility model Figure 2 Schematic diagram of the enlarged structure of the bottom ventilation tube and the quantitative self-priming tube.

[0020] Figure 5 It is a schematic diagram of the structure of a plurality of straws arranged in a row according to the utility model.

[0021] The reference numerals in the drawings are: top airbag-1, ventilation pipe-2, quantitative self-priming pipe-3, annular gap-4, ventilation hole-5, sealing convex edge-6, anti-slip pattern-61, connecting wing-7. DETAILED DESCRIPTION

[0022] The present invention is further described in detail below in conjunction with the accompanying drawings.

[0023] like Figures 2 to 5 As shown, a fully plastic self-priming quantitative suction straw comprises a top airbag 1, a vent tube 2 and a quantitative self-priming tube 3; the upper end of the top airbag 1 is sealed by hot melting; the lower end of the top airbag 1 is connected to the upper end of the vent tube 2; a quantitative self-priming tube 3 is fixed on the lower end of the vent tube 2, and the quantitative self-priming tube 3 is sealed and connected to the lower end of the vent tube 2 on all sides; the upper end of the quantitative self-priming tube 3 extends to the inside of the lower end of the vent tube 2, the upper end surface of the quantitative self-priming tube 3 is higher than the lower end surface below the inside of the vent tube 2, and an annular gap 4 is left between the outer side around the upper end surface of the quantitative self-priming tube 3 and the surrounding side walls of the lower end of the inside of the vent tube 2; the top airbag 1, the vent tube 2 and the quantitative self-priming tube 3 are an integrally formed structure and are made of hydrophilic polymer material; the top airbag 1, the vent tube 2 and the quantitative self-priming tube 3 are made by injection molding; a vent hole 5 is provided on the side of the top airbag 1.

[0024] like Figures 2 to 5 As shown, in order to separate the upper end of the quantitative self-priming tube 3 from the inner wall of the ventilation tube 2 and reduce the difficulty of core pulling, further, the upper end surface of the quantitative self-priming tube 3 is 1 to 5 mm higher than the lower end surface below the inside of the ventilation tube 2, and 1.5 mm is preferred. Furthermore, the top airbag 1 has a flat structure. Furthermore, a sealing convex edge 6 is provided at the upper end of the top airbag 1; the front and rear sides of the sealing convex edge 6 are provided with anti-skid patterns 61, which can effectively prevent slipping and facilitate taking. Furthermore, the top airbag 1 has a conical structure that is larger at the top and smaller at the bottom. Furthermore, connecting wings 7 are provided on both sides of the top airbag 1.

[0025] like Figures 2 to 5As shown, an injection molding structure of a fully plastic self-priming quantitative straw is shown, wherein a plurality of the straws are arranged in a row and connected by connecting wings 7, wherein a thin connecting strip is provided in the middle between every two connecting wings 7, so that it is easy to tear apart, and the structure in which the plurality of straws are arranged in a row is an injection molding structure, so that large-scale batch production can be carried out, and when they need to be used individually, the connecting wings 6 on the sides of the top airbag 1 can be torn apart from each other.

[0026] like Figures 2 to 5 As shown, a preparation process of a fully plastic self-priming quantitative straw comprises the following steps: a hydrophilic polymer material is injection molded into a plurality of continuous flow channels of a mold, and after cooling and shaping, a top airbag 1, a vent pipe 2, and a quantitative self-priming tube 3 structure connected from top to bottom are formed, at which point the upper end of the top airbag 1 is an open structure, and then the core is pulled out of the mold from the upper end opening of the top airbag 1, the entire straw is taken out, the upper end opening of the top airbag 1 is sealed by hot-melt welding, and finally a vent hole 5 is opened on the side of the top airbag 1.

[0027] The utility model changes the traditional connection structure, and the top airbag 1, the ventilation tube 2, and the quantitative self-priming tube 3 are integrally formed from top to bottom, and are all made of hydrophilic materials, so that the quantitative self-priming tube 3 can automatically absorb liquid, and there is no need to insert a glass capillary, which reduces the process requirements and improves production efficiency. The utility model adopts the injection molding process, and the product has good dimensional stability and can be mass-produced on a large scale and efficiently; after the utility model is injected, the upper end of the top airbag 1 is open, so the core can be pulled from the upper end of the top airbag 1, and finally the upper end of the top airbag 1 is hot-melt sealed, which is also the design focus of the utility model, overcoming the technical barrier that the prior art cannot perform injection molding.

[0028] The utility model extends the upper end of the quantitative self-priming tube 3 to the inside of the lower end of the ventilation tube 2, the upper end surface of the quantitative self-priming tube 3 is higher than the lower end surface below the inside of the ventilation tube 2, and an annular gap 4 is left between the outer side around the upper end surface of the quantitative self-priming tube 3 and the surrounding side walls of the lower end of the interior of the ventilation tube 2, so that the upper end of the quantitative self-priming tube 3 is separated from the inside of the ventilation tube 2. With this design, after the quantitative self-priming tube 3 automatically absorbs liquid, it will not continue to absorb it upward along the ventilation tube 2. The liquid absorbed by the quantitative self-priming tube 3 is the liquid of the required volume, so as to achieve the purpose of accurate absorption.

[0029] When the utility model collects liquid, as long as the lower end of the quantitative self-priming tube 3 is tilted to contact the liquid, the liquid will automatically fill the quantitative self-priming tube 3, and then the thumb and index finger cover the vent hole 5 of the top air bag 1, and then squeeze the top air bag 1 to discharge the collected liquid, which is convenient to use.

[0030] The above description is only a preferred embodiment of the present invention and is not intended to limit the present invention. Any modifications, equivalent substitutions, improvements, etc. made within the spirit and principles of the present invention should be included in the protection scope of the present invention.

Claims

1. A fully plastic self-priming quantitative straw, characterized in that: It includes a top airbag, a ventilation tube, and a quantitative self-priming tube; the upper end of the top airbag is sealed by hot melting; the lower end of the top airbag is connected to the upper end of the ventilation tube; a quantitative self-priming tube is passed through and fixed at the lower end of the ventilation tube, and the quantitative self-priming tube is sealed around and connected to the lower end of the ventilation tube; the upper end of the quantitative self-priming tube extends to the inside of the lower end of the ventilation tube, the upper end surface of the quantitative self-priming tube is higher than the lower end surface below the inside of the ventilation tube, and an annular gap is left between the outer side around the upper end surface of the quantitative self-priming tube and the surrounding side walls of the lower end of the ventilation tube; the top airbag, ventilation tube, and quantitative self-priming tube are an integrated structure and are made of hydrophilic polymer material; the top airbag, ventilation tube, and quantitative self-priming tube are made by injection molding; a ventilation hole is opened on the side of the top airbag.

2. The all-plastic self-priming quantitative drinking straw according to claim 1, characterized in that: The upper end surface of the quantitative self-priming tube is 1 to 5 mm higher than the lower end surface below the inside of the ventilation tube.

3. The all-plastic self-priming quantitative drinking straw according to claim 1, characterized in that: The top airbag is of flat structure.

4. The all-plastic self-priming quantitative drinking straw according to claim 1, characterized in that: The upper end of the top airbag is provided with a sealing convex edge; the front and rear sides of the sealing convex edge are provided with anti-slip patterns.

5. The all-plastic self-priming quantitative drinking straw according to claim 1, characterized in that: The top airbag is in a conical structure that is larger at the top and smaller at the bottom.

6. The all-plastic self-priming quantitative drinking straw according to claim 1, characterized in that: Connecting wings are arranged on both sides of the top airbag.

7. An injection molding structure of a fully plastic self-priming quantitative drinking straw according to claim 6, characterized in that: A plurality of the straws are arranged in a row and connected by connecting wings.

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