CN219595236U - Medicinal thermoplastic elastomer gasket - Google Patents

Abstract

The utility model provides a medicinal thermoplastic elastomer gasket, relates to the technical field of accessories in a combined cover for a plastic infusion container, and solves the problems that the conventional medicinal thermoplastic elastomer gasket adopts a single-layer structure, has poor sealing performance and is easy to loosen a puncture outfit, and comprises a hard inner layer and a soft outer layer; the hard inner layer is cylindrical; the hard inner layer is provided with a puncture hole along the longitudinal direction; the soft outer layer completely fills the puncture and covers all surfaces of the hard inner layer. According to the utility model, through the double-layer structure of the hard inner layer and the soft outer layer, when the puncture outfit passes through the puncture hole, the hard inner layer which is close to the puncture hole can limit the deformation of soft materials in the puncture hole, so that the puncture outfit can recover quickly and has better sealing property. Meanwhile, the supporting force of the hard inner layer on the soft material in the puncture hole is applied, so that the clamping force of the puncture outfit is larger, and the puncture outfit is not easy to fall off.

Description

Medicinal thermoplastic elastomer gasket

Technical Field

The utility model relates to the technical field of accessories in a combined cover for a plastic infusion container, in particular to a medicinal thermoplastic elastomer gasket.

Background

At present, a medical synthetic polyisoprene gasket is the most common sealing accessory in the medical field and is mainly used for preventing liquid leakage in the infusion process. The traditional medicinal polyisoprene gasket is produced by mixing raw materials such as isoprene rubber and the like, and performing multiple procedures such as rubber mixing, vulcanization, tabletting, slicing, siliconizing and the like.

In the existing thermoplastic elastomer gasket, the single-layer thermoplastic elastomer is mainly prepared, the single-layer thermoplastic elastomer gasket cannot be quickly restored after being extruded in the puncturing process, the sealing performance and the puncture device retention performance of the gasket are reduced in the infusion process, and the phenomena of liquid leakage and loosening of the infusion tube puncture device are easily caused. Patent publication No. CN107662757A discloses a thermoplastic elastomer gasket and an infusion package combined cover containing the gasket, wherein the gasket has a single-layer structure. Patent publication No. CN217548554U discloses a composite gasket and a combined cover for large transfusion package, wherein the periphery of a puncture part is still an elastic main body, a supporting framework is far away from the puncture part, and when a puncture needle punctures an elastic body, the supporting framework can not reduce deformation of the puncture part.

Disclosure of Invention

The utility model aims to provide a medicinal thermoplastic elastomer gasket, which solves the problems that the existing medicinal thermoplastic elastomer gasket adopts a single-layer structure, the tightness is poor and a puncture outfit is easy to loosen.

The embodiment of the utility model is realized by the following technical scheme:

a medicinal thermoplastic elastomer gasket comprises a hard inner layer and a soft outer layer; the hard inner layer is cylindrical; the hard inner layer is provided with a puncture hole along the longitudinal direction; the soft outer layer completely fills the puncture and covers all surfaces of the hard inner layer.

Preferably, a groove is arranged at the position of the soft outer layer covering the puncture hole; the axis of the groove is collinear with the axis of the puncture.

Preferably, the puncture hole comprises an infusion hole and a dosing hole.

Preferably, the number of the medicine adding holes is at least two.

Preferably, the inner diameter of the infusion hole is larger than the inner diameter of the dosing hole.

Preferably, the overlapping surface of the soft outer layer is provided with at least three protrusions.

Preferably, the soft outer layer coats the hard inner layer to form a cylindrical pad main body; the pad body is sleeved in the annular fixing piece and connected with the inner wall of the annular fixing piece.

The technical scheme of the embodiment of the utility model has at least the following advantages and beneficial effects:

according to the utility model, through the double-layer structure of the hard inner layer and the soft outer layer, when the puncture outfit passes through the puncture hole, the hard inner layer which is close to the puncture hole can limit the deformation of soft materials in the puncture hole, so that the puncture outfit can recover quickly and has better sealing property. Meanwhile, the supporting force of the hard inner layer on the soft material in the puncture hole is applied, so that the clamping force of the puncture outfit is larger, and the puncture outfit is not easy to fall off.

Drawings

In order to more clearly illustrate the technical solutions of the embodiments of the present utility model, the drawings that are needed in the embodiments will be briefly described below, it being understood that the following drawings only illustrate some embodiments of the present utility model and therefore should not be considered as limiting the scope, and other related drawings may be obtained according to these drawings without inventive effort for a person skilled in the art.

FIG. 1 is a schematic illustration of a pharmaceutical thermoplastic elastomer spacer provided by the present utility model;

FIG. 2 is a top view of FIG. 1;

FIG. 3 is a schematic cross-sectional view of FIG. 1;

FIG. 4 is a schematic longitudinal section of FIG. 1;

FIG. 5 is a schematic view of a cover;

icon: 1-hard inner layer, 11-puncture hole, 111-transfusion hole, 112-dosing hole, 2-soft outer layer, 21-groove, 22-protrusion and 3-annular fixing piece.

Detailed Description

For the purpose of making the objects, technical solutions and advantages of the embodiments of the present utility model more apparent, the technical solutions of the embodiments of the present utility model will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present utility model, and it is apparent that the described embodiments are some embodiments of the present utility model, but not all embodiments of the present utility model. The components of the embodiments of the present utility model generally described and illustrated in the figures herein may be arranged and designed in a wide variety of different configurations.

Example 1

As shown in fig. 1-5, a pharmaceutical thermoplastic elastomer spacer comprises a hard inner layer 1 and a soft outer layer 2; the hard inner layer 1 is cylindrical; the hard inner layer 1 is provided with a puncture hole 11 along the longitudinal direction; the soft outer layer 2 completely fills the puncture hole 11 and covers all surfaces of the hard inner layer 1.

In a specific implementation process, the soft outer layer 2 can be made of polyisoprene. The gasket used for the infusion cover is generally provided with a rubber gasket and an elastomer gasket, the rubber gasket has good sealing performance, but has high production cost and large pollution, and the elastomer gasket has the problem of poor sealing performance. In the puncturing process, the hard inner layer 1 which is close to the puncturing hole 11 can limit the deformation of the soft material in the puncturing hole 11, so that the soft material can be quickly recovered, and the sealing performance is better. Meanwhile, the supporting force of the hard inner layer 1 to the soft material in the puncture hole 11 is received, so that the clamping force of the puncture outfit is larger, and the puncture outfit is not easy to fall off

In this embodiment, a groove 21 is provided at a position of the soft outer layer 2 covering the puncture hole 11; the axis of the groove 21 is collinear with the axis of the puncture 11.

In practice, the macroscopic grooves 21 can accurately locate the position of the puncture hole 11.

In this embodiment, the puncture hole 11 includes an infusion hole 111 and a dosing hole 112.

In a specific implementation process, the infusion hole 111 is used for inserting a plastic needle of an infusion tube, and the dosing hole 112 is used for inserting a dosing injector.

In this embodiment, there are at least two drug adding holes 112.

In a specific implementation process, when multiple liquid medicines are required to be added, different liquid medicines adopt different medicine adding holes 112 to avoid pollution.

In this embodiment, the inner diameter of the infusion hole 111 is larger than the inner diameter of the dosing hole 112.

In the specific implementation process, the outer diameter of the plastic needle of the infusion tube is larger than the outer diameter of the needle of the dosing syringe, so that the inner diameter of the infusion hole 111 is larger than the inner diameter of the dosing hole 112.

In this embodiment, at least three protrusions 22 are provided on the overlapping surface of the soft outer layer 2.

In practice, the gaskets are placed in overlapping relation during production, and the protrusions 22 are provided to prevent adhesion between the gaskets during overlapping.

In this embodiment, the soft outer layer 2 coats the hard inner layer 1 to form a cylindrical pad body; the pad body is sleeved in the annular fixing piece 3 and is connected with the inner wall of the annular fixing piece 3.

In the implementation process, the gasket and the cover body shown in fig. 5 are placed, and the annular fixing piece 3 can fix the gasket in the cover body.

The above is only a preferred embodiment of the present utility model, and is not intended to limit the present utility model, but various modifications and variations can be made to the present utility model by those skilled in the art. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present utility model should be included in the protection scope of the present utility model.

Claims (7)

1. A pharmaceutical thermoplastic elastomer gasket comprising a hard inner layer and a soft outer layer; the hard inner layer is cylindrical; the hard inner layer is provided with a puncture hole along the longitudinal direction; the soft outer layer completely fills the puncture and covers all surfaces of the hard inner layer.

2. A pharmaceutical thermoplastic elastomer spacer according to claim 1, wherein said soft outer layer is provided with a recess at a location covering said puncture; the axis of the groove is collinear with the axis of the puncture.

3. The pharmaceutical thermoplastic elastomer spacer according to claim 1, wherein said puncture hole comprises an infusion hole and a dosing hole.

4. A pharmaceutical thermoplastic elastomer spacer according to claim 3, wherein there are at least two of said dosing holes.

5. A pharmaceutical thermoplastic elastomer spacer according to claim 3, wherein said infusion orifice inner diameter is larger than said dosing orifice inner diameter.

6. A pharmaceutical thermoplastic elastomer spacer according to any one of claims 1 to 5, wherein the overlapping surface of said soft outer layer is provided with at least three protrusions.

7. The medical thermoplastic elastomer spacer according to claim 5, wherein said soft outer layer forms a cylindrical pad body after coating said hard inner layer; the pad body is sleeved in the annular fixing piece and connected with the inner wall of the annular fixing piece.