CN215083474U

CN215083474U - Film-covered syringe

Info

Publication number: CN215083474U
Application number: CN202120227738.7U
Authority: CN
Inventors: 张颖; 黄月娣
Original assignee: Individual
Current assignee: First Affiliated Hospital of Sun Yat Sen University
Priority date: 2021-01-27
Filing date: 2021-01-27
Publication date: 2021-12-10
Anticipated expiration: 2031-01-27

Abstract

The utility model discloses a film-covered injector, which at least comprises a needle cylinder, a piston, an injection push rod group and a soft film, wherein one end of the needle cylinder forms an injection end, and the other end forms an end cover; the piston is slidably positioned in the cavity of the needle cylinder to divide the cavity into a first cavity close to the injection end and a second cavity far away from the injection end; the injection push rod group comprises a piston shaft and a press cover, one end of the piston shaft penetrates through the needle cylinder and extends into the needle cylinder to be connected with the piston, the other end of the piston shaft extends out of the end cover to be connected with the press cover in a group mode, the outer wall of the piston is connected with the inner wall of the cavity where the needle cylinder is located, and when the injection push rod group applies load force to the piston, the piston can move towards the injection end of the needle cylinder or away from the injection end of the needle cylinder; the soft film is used for connecting the end cover and the pressing cover and enclosing the second cavity into a closed cavity; the utility model provides a tectorial membrane syringe aims at solving among the prior art piston shaft length and exposes with the external world, makes the syringe very easily contaminated problem.

Description

Film-covered syringe

Technical Field

The application relates to the field of medical equipment, in particular to a film-coated injector.

Background

Note that the contents described in this section do not represent all the related art.

The prior injector consists of a needle head (comprising a needle point, a needle stalk, a pintle and a needle head protective cap), a needle cylinder (comprising a nipple and an empty cylinder), and a piston (comprising a piston, a piston shaft and a piston handle). Because the piston shaft is exposed outside for a long time, the piston shaft is easy to be polluted in the process of adding and injecting the medicine, so that the infection is caused or aggravated, and the state of an illness is further aggravated.

Meanwhile, the requirements on workers who add medicine and use the syringe are high during use, particularly when a micro-injection pump is used, slow injection and strict control of the infusion speed are needed, and the syringe can be fixed in an infusion station for hours or even 24 hours in some cases, so that the syringe is extremely easy to be polluted. In addition, for the critical patients with serious illness, a plurality of micro-injection pumps are often used at the same time, the number of pipelines is large, the duration is long, the piston shaft of the injector is more prone to pollution, the infection risk is possibly aggravated, the hospitalization time of the patients is prolonged, and the economic burden of the patients is aggravated. Therefore, there is a real need for further improvement.

Disclosure of Invention

The utility model discloses mainly to above problem, provided a tectorial membrane syringe, aim at solving among the prior art piston shaft length and expose with the external world, make the syringe very easily contaminated problem.

In order to achieve the above object, the present invention provides a film-covered syringe, which at least comprises:

the syringe comprises a syringe body, a needle cylinder and a needle, wherein one end of the syringe body forms an injection end, and the other end of the syringe body forms an end cover;

a piston slidably positioned within the chamber of the barrel dividing the chamber into a first chamber proximal to the injection end and a second chamber distal to the injection end;

the injection push rod group comprises a piston shaft and a pressing cover, one end of the piston shaft penetrates through the needle cylinder and extends into the needle cylinder to be connected with the piston, the other end of the piston shaft extends out of the end cover to be connected with the pressing cover in a group mode, the outer wall of the piston is jointed with the inner wall of a cavity where the needle cylinder is located, and when the injection push rod group applies load force to the piston, the piston can move towards the injection end of the needle cylinder or away from the injection end of the needle cylinder; and

and the soft membrane is used for connecting the end cover and the pressing cover and enclosing the second cavity into a closed cavity.

Further, the soft membrane is one of silica gel or fiber elastic membrane.

Further, the injection end comprises a nipple and a connector arranged on the periphery of the nipple, and a spiral thread structure is arranged in the connector.

Further, the outer wall of the needle cylinder is provided with a scale value.

Compared with the prior art, the utility model provides a pair of tectorial membrane syringe has following advantage:

1. a soft membrane is arranged between the end cover of the syringe and the pressing cover of the injection push rod group to enclose the piston shaft, so that the risk that the piston shaft is polluted because the piston shaft is exposed to the outside during dosing, injecting or using a micro-injector can be avoided;

2. the nipple of the injection end is provided with the spiral thread interface, so that on one hand, the connection is more stable and is not easy to break; on the other hand, the nursing difficulty of the pipeline is reduced, and the problems of blood backflow, pipe blockage, pollution, infection and the fact that medicines are not used for patients to cause the illness state not to be relieved or aggravated and even die due to the fact that the pipeline is disconnected are avoided;

other advantages of the present invention are further clarified in the detailed description.

Drawings

FIG. 1 illustrates the internal structure of a coated syringe of the present disclosure.

Fig. 2 is a partially enlarged schematic view of a portion a in fig. 1.

Reference numerals shown in the drawings: 1. a needle cylinder; 2. a piston; 3. an injection push rod set; 4. a soft film; 10. an end cap; 11. an injection end; 30. a piston shaft; 31. pressing the cover; 101. a first chamber; 102. a second chamber; 110. a nipple; 111. an interface; 1110. a spiral thread structure.

Detailed Description

The present invention will be described in detail below with reference to the accompanying drawings, wherein the technical solutions in the embodiments of the present invention are clearly and completely described, and it is obvious that the described embodiments are only some embodiments of the present invention, not all embodiments. Based on the embodiments in the present invention, all other embodiments obtained by a person skilled in the art without creative work belong to the protection scope of the present invention.

It will be understood that when an element is referred to as being "secured to" another element, it can be directly on the other element or intervening elements may also be present. When a component is referred to as being "connected" to another component, it can be directly connected to the other component or intervening components may also be present. When a component is referred to as being "disposed on" another component, it can be directly on the other component or intervening components may also be present. The terms "vertical," "horizontal," "left," "right," and the like as used herein are for illustrative purposes only.

Unless defined otherwise, all technical and scientific terms used herein have the same meaning as commonly understood by one of ordinary skill in the art to which this invention belongs. The terminology used in the description of the invention herein is for the purpose of describing particular embodiments only and is not intended to be limiting of the invention. As used herein, the term "and/or" includes any and all combinations of one or more of the associated listed items.

Fig. 1 and 2 show a film-coated injector according to an embodiment of the present invention, which is mainly divided into four major components, i.e., a syringe 1, a piston 2, an injection push rod set 3 and a soft film 4; wherein:

one end of the syringe 1 forms an injection end 11, the other end forms an end cover 10, the whole structure is similar to the structure of the known syringe, and a hand-held area is formed on one side of the end cover 10, so that the injection is convenient for a user; the piston 2 is slidably positioned within the chamber of said barrel 1, dividing the chamber into a first chamber 101 proximal to the injection end 11 and a second chamber 102 distal to the injection end 11.

The injection push rod set 3 comprises a piston shaft 30 and a pressing cover 31, one end of the piston shaft 30 penetrates into the syringe 1 to connect with the piston 2, the other end of the piston shaft 30 extends out of the end cover 10 to connect with the pressing cover 31, the outer wall of the piston 2 is connected with the inner wall of the chamber where the syringe 1 is located, so that the first chamber 101 and the second chamber 102 are isolated from each other and not communicated with each other under the partition of the piston 2, and when the injection push rod set 3 applies a loading force to the piston 2, the piston 2 can move towards the injection end 11 of the syringe 1 or away from the injection end 11 of the syringe 1.

One of the important points in this embodiment is that a soft membrane 4 is disposed between the end cap 10 of the syringe 1 and the pressing cap 31, the soft membrane 4 is used to connect the end cap 10 and the pressing cap 31, and the second chamber 102 is enclosed into a sealed cavity, so that the piston shaft 30 can be always located in the isolated cavity during dosing, injecting or using the micro-syringe, thereby avoiding the exposure risk, in some embodiments, the soft membrane 4 is elastic and can be compressed and stretched, for example, the soft membrane 4 may be one of a silica gel, a latex, or a fiber elastic membrane, but is not limited thereto.

Fig. 2 is a partial enlarged structural view of the injection tip 11 according to the above embodiment, and as can be seen from fig. 2, the injection tip 11 includes a nipple 110 and a joint 111 disposed on the periphery of the nipple 110, the joint 111 may be a spiral structure, the spiral structure 1110 may make the connection between the nipple 110 and the duct more secure, and the implementation form may be various, such as one rib, such as an annular threaded rib, or a plurality of ribs, such as a plurality of ribs parallel to each other or a plurality of annular ribs parallel to each other; the nipple 110 in the prior art is generally in a direct insertion type structure and is easy to break, in the embodiment, the nipple 110 is changed into a spiral thread interface, and when the injector in the embodiment is connected with a venous channel interface (an infusion connector or a three-way switch connector) or a micro-injection pump pipe, on one hand, the connection is more stable and is not easy to break; on the other hand, the nursing difficulty of the pipeline is reduced, and the problems that blood backflow, pipe blockage, pollution, infection and medicine are not used for patients to cause the illness state not to be relieved or aggravated and even to die due to the fact that the pipeline is disconnected are avoided.

In some embodiments, the outer wall of the barrel 1 is provided with a scale (not shown) to assist the operator in accurate dosing.

From a reading of the foregoing detailed description, it will be appreciated by those skilled in the art that the invention can be readily implemented. It should be understood, however, that the intention is not to limit the invention to the particular embodiments described. On the basis of the embodiments disclosed, a person skilled in the art can combine different features at will, so as to implement different solutions, and can combine different forms of additional functions to form other solutions. The scope of protection of the application is therefore only limited by the scope of the appended claims.

It is right to have used specific individual example above the utility model discloses expound, only be used for helping to understand the utility model discloses, not be used for the restriction the utility model discloses. To the technical field of the utility model technical personnel, the foundation the utility model discloses an idea can also be made a plurality of simple deductions, warp or replacement.

Claims

1. A covered syringe, comprising at least:

2. The covered syringe of claim 1, wherein the flexible membrane is one of a silicone or a fiber elastic membrane.

3. The laminating syringe of claim 1, wherein the injection end includes a nipple and a port disposed around the nipple, and wherein the port has a spiral thread structure disposed therein.

4. A film-covered syringe according to any one of claims 1 to 3, wherein the outer wall of the barrel is provided with scale values.