Disposable syringe

Abstract

The invention belongs to the technical field of intravenous injection instruments and particularly relates to a disposable syringe. The disposable syringe comprises a needle cylinder (1). A needle handle (12) for being connected with a needle head (11) is arranged at the top end of the needle cylinder (1). A cylinder lug (13) is arranged at the tail end of the needle cylinder (1). The needle cylinder (1) is provided with a push handle (2), and a hand pressing part (21) is arranged at the bottom of the push handle (2). The disposable syringe further comprises a connecting rod (3) formed by hinging two rods, the two ends of the connecting rod (3) are hinged to the needle cylinder (1) and the push handle (2) respectively, a groove (14) for allowing the connecting rod (3) to pass through is formed in the cylinder lug (13), and the connecting rod (3) carries out opening and closing motion along the groove (14) along with the push-and-pull motion of the push handle (2) in the needle cylinder (1). The disposable syringe has the advantages of being simple in structure and convenient to manufacture, and labor can be saved during injection of the syringe on the premise that cost is not greatly increased.

Description

technical field [0001] The invention belongs to the technical field of intravenous injection devices, in particular to a disposable syringe. Background technique [0002] Disposable syringes in the prior art such as figure 1 As shown, the syringe (1) is included, the top of the syringe (1) is a needle handle (12) for connecting the needle (11), and the tail end of the syringe (1) is provided with a cylinder ear (13). (1) push handle (2) is arranged, and the bottom of push handle (2) is hand press portion (21), and the front end of push handle (2) is rubber stopper. Disposable syringes in the prior art have the following disadvantages: (1) when injecting, it is necessary to use the index finger and middle finger to hold against the cylinder ear, and press the hand pressing part at the bottom of the push handle with the thumb. Due to the limited distance between the thumb and the index finger and middle finger, The push handle cannot be pulled farther out. When a larger volu...

AI Technical Summary

Problems solved by technology

Disposable syringes in the prior art have the following disadvantages: (1) when injecting, it is necessary to use the index finger and middle finger to hold against the cylinder ear, and press the hand pressing part at the bottom of the push handle with the thumb. Due to the limited distance between the thumb and the index finger and middle finger, The push handle cannot be pulled farther out. When a larger volume of liquid medicine needs to be injected, it can only be achieved by thickening the syringe.

(2) Ordinary injections are transparent, and because of the angle problem, when a novice injects, it is often impossible to maintain a uniform injection speed by observing the injection

(3) For some medicines that need to be injected quickly, it is necessary to apply greater pressure on the pressing part of the hand, and the cooperation mode of the thumb, index finger, and middle finger is not conducive to force, resulting in more laborious injection

Images