Disposable pre-filled syringe

Abstract

The utility model discloses a kind of disposable pre-filled liquid injection device, it includes injection cylinder, injection needle, piston and injection push rod;The injection cylinder includes cylinder body, needle connector arranged at the front end of cylinder body and sealing membrane arranged on needle connector, the inner wall of piston and cylinder body is sealed cooperation, the middle part of piston is provided with the jackplug connected with injection push rod;The injection needle includes the cap of sealed connection with needle connector, the medicine inlet needle for puncturing sealing membrane fixed in the middle part of cap and the medicine outlet needle for puncturing soft tissue fixed in the middle part of cap.The utility model one-time use pre-filled liquid injection device, it can pre-fill liquid in injection cylinder, when assembling good injection needle and injection push rod in situ emergency treatment can carry out drug injection, without on-site dispensing, can shorten treatment time, improve treatment efficiency.

Description

Technical Field

[0001] This utility model relates to the field of medical supplies technology, and in particular to a pre-filled drug injection device. Background Technology

[0002] Existing syringes do not have pre-filled medication capabilities, requiring doctors to transfer drugs into the syringe on-site before injection. However, in emergency situations, doctors need to complete the treatment process within a short time, and using existing syringes for on-site medication preparation wastes valuable treatment time, which is detrimental to improving treatment efficiency and success rates. Utility Model Content

[0003] In view of this, the purpose of this utility model is to provide a disposable pre-filled drug injection device to solve the technical problem that traditional syringes cannot be pre-filled with drugs, and that on-site drug preparation will consume valuable treatment time, which is detrimental to emergency treatment.

[0004] This utility model relates to a disposable pre-filled drug injection device, comprising an injection cylinder, an injection needle, a piston, and an injection push rod; the injection cylinder includes a cylinder body, a needle connector disposed at the front end of the cylinder body, and a sealing membrane disposed on the needle connector; the piston is sealed to the inner wall of the cylinder body, and the piston has an insertion hole in the middle for connecting to the injection push rod; the injection needle includes a cap sealed to the needle connector, a drug-injecting needle fixed in the middle of the cap for piercing the sealing membrane, and a drug-extraction needle fixed in the middle of the cap for piercing soft tissue.

[0005] Furthermore, the syringe is pre-filled with a medicinal solution.

[0006] Furthermore, the needle connector and the cap are connected by threads.

[0007] Furthermore, the injection plunger and the insertion hole are connected by threads.

[0008] The beneficial effects of this utility model are:

[0009] 1. This utility model is a disposable pre-filled drug injection device, which can pre-fill the drug solution in the syringe. In case of emergency treatment on site, the injection needle and injection plunger can be assembled to inject the drug. There is no need to prepare the drug on site, which can shorten the treatment time and improve the treatment efficiency.

[0010] 2. The present invention provides a disposable pre-filled drug injection device, in which the piston and injection push rod are separate structures. After the injection cylinder is pre-filled with drug solution, the piston can be placed separately into the injection cylinder to seal the drug solution, making drug solution sealing more convenient. Moreover, the piston and injection push rod are separated before injection, which will not cause the piston to be accidentally pulled out by the injection push rod, thus improving the safety of use.

[0011] 3. Using existing syringes for on-site medication preparation presents the following problems: 1) When the ampoule is broken, glass shards may fall into it, causing the syringe to draw the glass shards into the syringe when drawing the medication; 2) Exposure of the medication to air can lead to secondary contamination. This invention, a disposable pre-filled medication injection device, completely avoids these problems, improving the safety of medication injection. Attached Figure Description

[0012] Figure 1 A schematic diagram showing the dispersion of components in a disposable pre-filled drug injection device.

[0013] Figure 2 This is a schematic diagram of the assembly state of a disposable pre-filled drug injection device. Detailed Implementation

[0014] The present invention will be further described below with reference to the accompanying drawings and embodiments.

[0015] As shown in the figure, the disposable pre-filled drug injection device of this embodiment includes an injection cylinder 1, an injection needle 2, a piston 3, and an injection push rod 4; the injection cylinder includes a cylinder body 11, a needle connector 12 disposed at the front end of the cylinder body, and a sealing membrane 13 disposed on the needle connector; the piston 3 is sealed to the inner wall of the cylinder body 11, and the piston 3 has an insertion hole 31 in the middle for connecting to the injection push rod 4; the injection needle 2 includes a cap 21 sealed to the needle connector 12, a drug-injecting needle 22 fixed in the middle of the cap for piercing the sealing membrane, and a drug-extraction needle 23 fixed in the middle of the cap for piercing soft tissue.

[0016] The syringe is pre-filled with liquid medicine 5.

[0017] In use, first connect the injection plunger 4 to the insertion hole 31 on the piston 3, and then connect the injection needle 2 to the needle connector 12. As the injection needle 2 is connected to the needle connector 12, the injection needle 22 will penetrate the sealing membrane 13. In this way, after the injection plunger 4 and injection needle 2 are assembled, the patient can be injected, thus eliminating the need for on-site filling of the syringe with medication, shortening the treatment time and improving the treatment efficiency.

[0018] As an improvement to the above embodiment, the needle connector 12 and the cap 21 are connected by a thread. Rotating the cap 21 allows the injection needle 22 to be inserted into the sealing membrane 13, which is convenient to operate. The threaded connection has good sealing performance and can avoid the problem of drug leakage during injection.

[0019] As an improvement to the above embodiment, the injection push rod 4 and the insertion hole 31 are connected by a thread. The threaded connection has good reliability. After the connection is made, the injection push rod 4 can not only push the piston forward, but also pull the piston backward when needed.

[0020] Finally, it should be noted that the above embodiments are only used to illustrate the technical solutions of this utility model and are not intended to limit it. Although this utility model has been described in detail with reference to preferred embodiments, those skilled in the art should understand that modifications or equivalent substitutions can be made to the technical solutions of this utility model without departing from the spirit and scope of the technical solutions of this utility model, and all such modifications or substitutions should be covered within the scope of the claims of this utility model.

Claims

1. A disposable pre-filled drug injection device, comprising a syringe, an injection needle, a piston, and an injection plunger; characterized in that: The syringe includes a syringe body, a needle connector located at the front end of the syringe body, and a sealing membrane located on the needle connector. The piston is sealed to the inner wall of the syringe body, and the piston has an insertion hole in the middle for connection with the injection push rod. The injection needle includes a cap sealed to the needle connector, a drug-injecting needle fixed in the middle of the cap for piercing the sealing membrane, and a drug-extraction needle fixed in the middle of the cap for piercing soft tissue.

2. The disposable pre-filled drug injection device according to claim 1, characterized in that: The syringe is pre-filled with medication.

3. The disposable pre-filled drug injection device according to claim 1, characterized in that: The needle connector and the cap are connected by threads.

4. The disposable pre-filled drug injection device according to claim 1, characterized in that: The injection plunger and the insertion hole are connected by threads.

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