CN205055076U - Intravenous injector - Google Patents

Abstract

The utility model provides an intravenous injector, includes cylinder and push rod, the syringe needle is fixed to the front end of cylinder, is equipped with the needle cap outside the syringe needle, the inner wall of cylinder is equipped with the screw thread, and the surface of push rod is equipped with the external screw thread that matches with the screw thread of cylinder, cylinder and push rod threaded connection, and the rear end of push rod is the caudal peduncle, is equipped with stop nut on the push rod, and stop nut's side is equipped with the screw, has the screw in the screw. The beneficial effects of the utility model are that: compare with prior art, cylinder and push rod screw -thread fit make the propulsion of medicine more steady, set up stop nut and screw, make the liquid medicine can not surpass the scheduled volume, so use the utility model discloses an intravenous injector can reach the purpose of control intravenous route speed and shot, can not bring danger for patient to can avoid the dispute of unnecessary doctors and patients. The utility model discloses an intravenous injector simple structure, convenient to use, market prospect is extensive.

Description

an intravenous syringe

technical field

The utility model belongs to the technical field of medical instruments, in particular to an intravenous injector.

Background technique

At present, intravenous injection is often used to treat diseases in clinical treatment and nursing work in hospitals. The amount of injection should be strictly controlled and the speed should not be too fast, otherwise it will bring danger to the patient. It is not easy to control when using ordinary disposable syringes for intravenous injection.

The speed and the amount of injection will bring danger to the patient and cause unnecessary doctor-patient disputes.

Utility model content

The purpose of this utility model is to provide an intravenous injector which can control the speed and injection volume of intravenous injection.

The technical scheme of the utility model is specifically:

An intravenous injector, including a syringe and a push rod, the front end of the syringe is fixed with a needle cap, the inner wall of the syringe is provided with threads, and the outer surface of the push rod is provided with a thread matching the thread of the syringe. External thread, syringe and push rod are threadedly connected, the rear end of push rod is a tail handle, the push rod is provided with a limit nut, the side of the limit nut is provided with a screw hole, and a screw is arranged in the screw hole.

The push rod is provided with a scale.

The beneficial effects of the utility model are as follows: compared with the prior art, the threaded cooperation between the syringe and the push rod makes the advancement of the medicine more stable; the limit nut and the screw are set so that the medicine liquid will not exceed the predetermined amount, so the utility model can The new type of intravenous injector can achieve the purpose of controlling the speed and volume of intravenous injection, and will not bring danger to patients, thereby avoiding unnecessary doctor-patient disputes. The intravenous injector of the utility model has the advantages of simple structure, convenient use and wide market prospect.

Description of drawings

Fig. 1 is the structural representation of the utility model.

Figure 2 is a schematic diagram of the needle cap.

detailed description

As shown in Figure 1, an intravenous syringe includes a syringe 3 and a push rod 4, the front end of the syringe 3 is fixed with a needle 2, the outside of the needle 2 is provided with a needle cap 1, the inner wall of the syringe 3 is provided with threads, and the front end of the push rod 4 The outer surface is provided with an external thread 41 matching the thread of the syringe 3, and the syringe 3 is threadedly connected with the push rod 4. The rear end of push rod 4 is tail handle 6, and push rod 4 is provided with limit nut 5, and the side of limit nut 5 is provided with screw hole 51, and screw is arranged in screw hole 51 (does not draw in screw figure). The push rod 4 is provided with a scale, which can be the same as that of the syringe 3 .

As shown in Figure 2, the needle cap 2 includes a needle cap body 11, an opening 12 is provided at the upper end of the needle cap body 11, and the needle cap body 11 has an accommodating chamber for accommodating a needle, and the accommodating chamber passes through the The opening 12 communicates with the outside world, the outer wall of the needle cap body 11 is fixed with side wings 13, the bottom outer surface of the needle cap body 11 is equipped with a suction cup 15, and the suction cup 15 is connected to the needle cap body through the support rod 14 11 connection, the material of the support rod 14 is rubber, the number of the side wings 13 is two, and the two side wings 13 are fixed symmetrically with the central axis of the needle cap body 11 as the axis of symmetry, and the two side wings 13 13 is symmetrically fixed on the middle part of the needle cap body 11 in the length direction, and the position where the side wings 13 are in contact with the hand is sunken inward to form a pressing part. The shape of the pressing part is an arc, and the diameter of the pressing part is 1.3cm-1.7cm, the length of the side wings 13 extending out of the needle cap body 11 is 3mm-5mm. When in use, people press the side wing 13 to pull out the needle cap, so that the hand pressing the side wing 13 is farther away from the needle, effectively preventing the danger of the hand being pierced by the needle head, and the part where the side wing 13 contacts the hand is an arc shape, so that when people press the side wings 13, it is more comfortable and firmer. Since the bottom of the needle cap body 11 is equipped with a suction cup 15, the needle cap can be turned upside down on the table when the needle cap is pulled out, and the suction cup 15 can suck On the desktop, after the syringe is used, the needle can be directly inserted into the needle cap, and the operation can be completed with one hand, which is more convenient. It is connected with the needle cap body 11 through a support rod 14, so that when people insert the needle into the needle cap, the needle cap can be tilted to a certain extent according to needs, that is, the direction of the needle cap opening 12 can be changed, which is more convenient to use.

Its working principle is:

As shown in Figure 1, before intravenous injection, first loosen the screw in the screw hole 51, turn the limit nut 5 to a predetermined position by hand, then tighten the screw to fix the limit nut 5, rotate the tail handle 6, and the liquid medicine enters the patient's body . When the pulse injection reaches a predetermined amount, the limit nut will be blocked by the syringe, so that the overdose will not be pushed. Complete the injection.

The push rod 4 is provided with a scale, which is to find the predetermined position for the convenience of the stop nut 5 .

Claims (2)

1. an intravenous injector, comprise syringe (3) and push rod (4), the front end fixed needle (2) of syringe (3), syringe needle (2) outside is provided with pin cap (1), it is characterized in that: the inwall of described syringe (3) is provided with screw thread, the outer surface of push rod (4) is provided with the external screw thread (41) mated with the screw thread of syringe (3), syringe (3) is threaded with push rod (4), the rear end of push rod (4) is caudal peduncle (6), push rod (4) is provided with stop nut (5), the side of stop nut (5) is provided with screw (51), and screw has screw in (51).

2. intravenous injector as claimed in claim 1, is characterized in that: described push rod (4) is provided with scale.