CN203090102U - Reusable constant volume syringe - Google Patents

Abstract

The utility model relates to a reusable constant volume syringe which comprises an injection head and a syringe body which are in threaded connection and convenient to dismount. All that is needed is to change the injection head after the injection is finished; so that the reusable constant volume syringe is safe and sanitary, the syringe body can be reused, accordingly, resource waste is avoided effectively, and the cost is saved. A cylinder body is arranged in the syringe body; a piston is arranged in the cylinder body and is connected with a self-locking switch; the gas flow in the cylinder body is in accordance with the liquor quantity in the injection medicine bottle; and the liquor in the injection medicine bottle is discharged completely when the self-locking switch is pressed down, so that waste is avoided, accurate injection quantity can be guaranteed, the structure is simple, and the operation is convenient.

Description

A reusable constant volume syringe

technical field

The utility model relates to a syringe, which is suitable for use, and in particular relates to a reusable constant-volume syringe, which belongs to the field of medical equipment.

Background technique

In the course of clinical treatment, many patients often need injection treatment, so as to cure diseases and rescue patients through the treatment means of injecting medicinal liquid. Therefore, injection is an important medical technology measure for carrying out scientific treatment and rescuing patients. Syringe is a medical device that needs to be frequently used in medical activities. It is mainly suitable for subcutaneous, intramuscular, intravenous and other medicinal liquid injection or blood suction.

At present, syringes are one of the most sold medical devices in the world. The commonly used syringes in the market are disposable syringes. According to conservative estimates, the total world consumption of disposable syringes alone reaches tens of billions each year. Disposable syringes usually consist of a syringe, a needle, a plunger and a plunger, with scale marks on the syringe.

In the process of realizing the present invention, the inventors found that there are at least the following problems in the prior art. The syringe is used once, resulting in waste of resources; the injection volume is determined by the scale mark on the syringe, which is not accurate enough.

Utility model content

The technical problem to be solved by the utility model is to provide a safe, reliable, reusable syringe body, accurate injection volume, simple structure and convenient operation for the above shortcomings.

In order to solve the above technical problems, the utility model adopts the following technical solutions: a reusable constant volume syringe, characterized in that: the syringe includes a threaded injection head and a syringe body;

The injection head includes an injection medicine bottle, one end of the injection medicine bottle is connected with an injection needle, and the other end of the injection medicine bottle is sealed with a rubber stopper;

The syringe body includes a syringe, a cylinder connected to the injection medicine bottle is fixed inside the syringe, a piston is arranged in the cylinder, a core rod is connected to the piston, a spring is set on the outer periphery of the core rod, and a self-locking rod is connected to the core rod. switch.

An optimized solution, the outer circumference of the injection bottle is provided with external threads.

In another optimized solution, the syringe is connected with an extension part, and the inner wall of the extension part is provided with an internal thread matched with an external thread on the injection medicine bottle.

After the utility model adopts the above technical scheme, compared with the prior art, the utility model has the following advantages: the injection head is threadedly connected with the syringe body, which is convenient for disassembly; after the injection is completed, the injection head can be replaced, which is safe and hygienic; Effectively avoid waste of resources and save costs; there is a cylinder in the syringe body, a piston in the cylinder, and a self-locking switch connected to the piston, and the amount of gas in the cylinder is consistent with the amount of liquid medicine in the injection bottle. Self-locking switch, the liquid medicine in the injection bottle is completely discharged, avoiding waste, and can ensure accurate injection volume, simple structure and convenient operation.

The utility model is described in detail below in conjunction with accompanying drawing and embodiment.

Description of drawings

Accompanying drawing 1 is the structural representation of syringe in the utility model embodiment;

In the figure,

1-injection needle, 2-injection bottle, 3-rubber stopper, 4-syringe, 5-needle, 6-first support seat, 7-cylinder, 8-piston, 9-second support seat, 10 -spring, 11-core rod, 12-baffle plate, 13-self-locking switch, 14-extended part.

Detailed ways

Embodiment, as shown in Fig. 1, a kind of reusable constant volume syringe comprises injection head and syringe body, and described injection head comprises injection medicine bottle 2, and one end of injection medicine bottle 2 is connected with injection needle 1, and injection medicine The other end of the bottle 2 is sealed with a rubber stopper 3, and the outer circumference of the injection bottle 2 is provided with external threads.

The syringe body includes a syringe 4, one end of the syringe 4 is provided with an extension part 14, the extension part 14 is provided with an internal thread matched with the external thread on the injection medicine bottle 2, and a cylinder is fixed in the cavity of the syringe 4. body 7, the amount of gas in the cylinder body 7 is consistent with the amount of liquid medicine in the injection medicine bottle 2, and in this embodiment, the cylinder body 7 passes through the first support seat 6 and the second support seat 9 fixedly arranged on the inner wall of the syringe 4 Fixed, the end of the cylinder 7 close to the extension 14 is connected with the needle 5, the needle 5 penetrates the rubber stopper 3 and communicates with the injection medicine bottle 2, the cavity of the cylinder 7 is provided with a piston 8, and the piston 8 is fixedly connected with the core rod 11, A spring 10 is sheathed on the outer periphery of the core rod 11 , one end of the spring 10 is connected to the second support seat 9 , the other end of the spring 10 is connected to a baffle 12 , and the core rod 11 is connected to a self-locking switch 13 .

When the self-locking switch 13 is pressed, the piston 8 moves, the gas in the cylinder 7 is transported into the injection vial 2 through the needle 5, and at the same time, the same amount of medicinal liquid in the injection vial 2 is output, and the self-locking switch is pressed again 13. Under the elastic force of the spring 10, the piston 8 returns to its original position. The self-locking switch 13 used in the embodiment of the present invention is a mechanical self-locking switch, which is common knowledge of those skilled in the art, so it will not be described again.

In the utility model, the injection head is threadedly connected with the syringe body, which is convenient for disassembly. After the injection is completed, the injection head can be replaced, which is safe and hygienic. The syringe body can be reused, effectively avoiding resource waste and saving costs; the syringe body is provided with a cylinder body, There is a piston in the cylinder, and the piston is connected with a self-locking switch, and the gas volume in the cylinder is consistent with the amount of liquid medicine in the injection bottle. Press the self-locking switch, and the liquid medicine in the injection bottle is completely discharged to avoid waste , and can ensure accurate injection volume, simple structure, easy to operate.

The above descriptions are examples of the best implementation modes of the present utility model, and the parts not mentioned in detail are the common knowledge of those skilled in the art. The protection scope of the present utility model is based on the content of the claims, and any equivalent transformation based on the technical inspiration of the present utility model is also within the protection scope of the present utility model.

Claims (3)

1. reusable standardize solution syringe, it is characterized in that: described syringe comprises injection head and the syringe body that is threaded;

Described injection head comprises injection medicine bottle (2), and an end of injection medicine bottle (2) is communicated with injection needle (1), and the other end of injection medicine bottle (2) is sealed with bottle closure of rubber (3);

Described syringe body comprises syringe (4), syringe (4) internal fixation is provided with the cylinder body (7) that is communicated with injection medicine bottle (2), be provided with piston (8) in the cylinder body (7), piston (8) is connected with core bar (11), the periphery of core bar (11) is set with spring (10), and core bar (11) is connected with self-lock switch (13).

2. a kind of reusable standardize solution syringe as claimed in claim 1, it is characterized in that: the periphery of described injection medicine bottle (2) is provided with external screw thread.

3. a kind of reusable standardize solution syringe as claimed in claim 2, it is characterized in that: described syringe (4) is connected with extension (14), and the inwall of extension (14) is provided with the female thread that matches with external screw thread on the injection medicine bottle (2).