CN205108585U - Area sterilization protection device's preliminary filling formula syringe - Google Patents

Abstract

The utility model discloses a prefilled syringe with a sterilization protection device, which comprises a syringe, a piston, a push rod, a plug and a stopper. The front end of the syringe is provided with a stopper, and the rear end is provided with a stopper. , the center of the anti-retraction plug is provided with a through hole, the piston is arranged inside the syringe, the piston is closely matched with the inner wall of the syringe, one end of the push rod is connected with the piston, and the other end is a free end. The utility model has the advantages of simple structure and safe use, and can effectively prevent the piston from falling off, air sucking back and liquid leakage, and ensures the cleanliness and safety of the sterilization process.

Description

A prefilled syringe with a sterilization protection device

technical field

The utility model relates to the field of medical instruments, in particular to a prefilled syringe with a sterilization protection device.

Background technique

In recent years, among common medical containers, prefilled syringes have developed rapidly, mainly because they have the following advantages: 1. It can avoid the risk of secondary pollution during the dispensing and injection process; 2. It is easy to use, and it is convenient for medical workers and patients to use ; 3. There is no residue in the liquid medicine, and it can be fully utilized; 4. It is suitable for special places such as fields, disaster areas, and battlefields.

Utility model content

Conventional sterilization of prefilled syringes presents a risk of contamination from piston dislodgement, air suck-back and leakage.

The utility model aims to provide a prefilled syringe with a sterilization protection device, which has a simple structure and is safe to use, can effectively prevent the piston from falling off, suck back air and leak liquid, and ensure the cleanliness and safety of the sterilization process.

In order to achieve the above object, the technical scheme adopted by the utility model is as follows:

The utility model discloses a prefilled syringe with a sterilization protection device, which comprises a syringe, a piston, a push rod, a plug and a stopper. The part is in a sealed state to ensure that the liquid in the syringe will not leak. The back end is provided with a stopper, and the center of the stopper is provided with a through hole. In cooperation, one end of the push rod is connected to the piston, and the other end is a free end.

Further, threads are provided on the inner wall of the rear end of the syringe, the stop plug is cylindrical, and external threads are provided on the outer circumference of the stop plug.

Preferably, threads are provided on the outer wall of the rear end of the syringe, the stop plug is cylindrical, an annular groove is provided at one end of the stop plug, and internal threads are provided on the side wall of the annular groove.

Further, the diameter of the through hole on the stop plug is larger than the diameter of the push rod.

Further, the push rod and the piston are threadedly connected, one end of the push rod is provided with an external thread, one end of the piston is provided with a blind hole, and the blind hole is provided with an internal thread.

Preferably, the push rod and the piston are in a snap-fit connection.

The utility model has the following beneficial effects:

The structure is simple, the manufacturing cost is low, and the use is safe. It can effectively prevent the piston from falling off, air sucking back and liquid leakage, greatly reducing the risk of pollution, and ensuring the cleanliness and safety of the sterilization process.

Description of drawings

Fig. 1 is the structural representation of embodiment one;

Fig. 2 is the structural representation of embodiment two;

In the figure: 1-syringe, 2-piston, 21-threaded blind hole, 3-backstop, 31-through hole, 32-annular groove, 4-plug, 5-push rod.

detailed description

In order to make the purpose, technical solution and advantages of the utility model clearer, the utility model will be further described in detail below in conjunction with the accompanying drawings.

Embodiment one

As shown in Figure 1, a prefilled syringe with a sterilization protection device disclosed by the utility model includes a syringe 1, a piston 2, a push rod 5, a plug 4 and a stopper 3, and the front end of the syringe 1 is provided with a There is a plug 4, the rear end of the syringe 1 is provided with a cylindrical anti-retraction plug 3, the inner wall of the rear end of the syringe 1 is provided with threads, the center of the anti-retraction plug 3 is provided with a through hole 31, and the outer circumference of the anti-retraction plug 3 is provided with There are external threads, the piston 2 is set inside the syringe 1, the piston 2 is closely matched with the inner wall of the syringe 1, the end of the piston 2 in contact with the stop plug 3 is provided with a threaded blind hole 21, and the end of the push rod 5 passes through the back stop plug 3 The through hole 31 is threadedly connected with the piston 2, and the other end is a free end. The diameter of the push rod 5 is less than the diameter of the through hole 31.

Embodiment two

As shown in Figure 2, the difference between this embodiment and Embodiment 1 is that: the outer wall of the rear end of the syringe 1 is provided with threads, the backstop 3 is cylindrical, and the center of the backstop 3 is provided with a through hole 31, the stop One end of the stopper 3 is provided with an annular groove 32, and the side wall of the annular groove 32 is provided with an internal thread.

Other parts of this embodiment are the same as those of Embodiment 1, so details are not repeated.

Certainly, the utility model also can have other various embodiments, under the situation of not departing from the spirit and essence of the utility model, those skilled in the art can make various corresponding changes and distortions according to the utility model, but these Corresponding changes and deformations should all belong to the scope of protection of the appended claims of the utility model.

Claims (6)

1. A prefilled syringe with a sterilization protection device, characterized in that it includes a syringe, a piston, a push rod, a plug and a stopper, the front end of the syringe is provided with a plug, and the rear end is provided with a stopper. To withdraw the plug, the center of the anti-retraction plug is provided with a through hole, the piston is arranged inside the syringe, the piston is closely matched with the inner wall of the syringe, one end of the push rod is connected to the piston, and the other end is a free end. 2. The prefilled syringe with sterilization protection device according to claim 1, characterized in that: the inner wall of the rear end of the syringe is provided with threads, the stopper is cylindrical, and the outer part of the stopper is External threads are arranged on the peripheral surface. 3. The prefilled syringe with a sterilization protection device according to claim 1, characterized in that: the outer wall of the rear end of the syringe is provided with threads, the stopper is cylindrical, and one end of the stopper is set There is an annular groove, and internal threads are arranged on the side wall of the annular groove. 4. The prefilled syringe with a sterilization protection device according to claim 1, characterized in that: the diameter of the through hole on the stop plug is larger than the diameter of the push rod. 5. The prefilled syringe with a sterilization protection device according to claim 1, characterized in that: the push rod is threadedly connected to the piston, one end of the push rod is provided with an external thread, and one end of the piston is provided with a blind hole, so The blind hole is provided with an internal thread. 6 . The prefilled syringe with a sterilization protection device according to claim 1 , wherein the push rod and the piston are snap-fitted. 7 .