Silicone-oil-free injector

Abstract

The utility model discloses a silicone-oil-free injector which comprises a needle cylinder and a core rod arranged in the needle cylinder in a sliding mode, the front end of the core rod is provided with an air bag used for extruding medicine, the rear end of the core rod is provided with an air conveying opening used for air inflow of inflation equipment, and the rear end of the core rod is further provided with a threaded connector used for being in butt joint with the inflation equipment. And the air bag is sealed at the front end of the core rod and is communicated with the air delivery port through an air delivery channel. The syringe has the advantages that no silicone oil is left when liquid medicine is injected, and the syringe is convenient to process and use and high in safety and reliability.

Description

Technical Field

[0001] The utility model relates to the technical field of medical devices, in particular to a silicone oil-free syringe. Background Art

[0002] At present, syringes on the market are all composed of a plunger rod, a piston, an outer sleeve or a plunger rod and an outer sleeve. Whether it is a three-piece syringe, the piston and the outer sleeve are directly in interference fit and lubricated with silicone oil. In the existing medical syringe usage environment, some syringes need to use special drugs. Since these special drugs need to avoid contact with silicone oil, there will be risks when using the syringes on the market.

[0003] Therefore, through beneficial exploration and research, the applicant has found a method to solve the above problems, and the technical solution to be introduced below is generated under this background. Summary of the Utility Model

[0004] The technical problem to be solved by the utility model is to provide a silicone oil-free syringe to solve the above problems in view of the above deficiencies and defects of the prior art.

[0005] The technical problem to be solved by the utility model can be realized by adopting the following technical solutions:

[0006] A silicone oil-free syringe includes a syringe barrel and a plunger rod slidably disposed in the syringe barrel. It is characterized in that an airbag for extruding drugs is provided at the front end of the plunger rod, an air inlet for an inflation device is provided at the rear end of the plunger rod, a threaded interface for docking with the inflation device is further provided at the rear end of the plunger rod, the airbag is sealed at the front end of the plunger rod, and the airbag is communicated with the air inlet through an air supply channel.

[0007] In a preferred embodiment of the utility model, one end of the syringe barrel is provided with an injection end, the other end of the syringe barrel is an open end, and a handle convenient for nurses to operate is provided on the outer periphery of the open end.

[0008] In a preferred embodiment of the utility model, a sealing member for reducing the pulling resistance of the plunger rod and improving the sealing performance is provided on the inner wall of the syringe barrel.

[0009] In a preferred embodiment of the utility model, the sealing member is a siliconized sealing ring.

[0010] Due to adopting the above technical solutions, the beneficial effects of the utility model are as follows: when injecting liquid medicine with the utility model, there is no silicone oil residue, it is convenient for processing and use, and has high safety and reliability. Brief Description of the Drawings

[0011] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the accompanying drawings required in the description of the embodiments or the prior art. Obviously, the accompanying drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on these drawings.

[0012] Figure 1 It is a schematic structural diagram of the present invention.

[0013] Figure 2 It is one of the working state diagrams of the present invention.

[0014] Figure 3 It is the second working state diagram of the present invention. Specific embodiments

[0015] In order to make the technical means, creative features, achieved purposes and effects realized by the present invention easy to understand, the present invention will be further described below with reference to specific illustrations.

[0016] See Figures 1 to 3 A silicone-free syringe shown, which includes a syringe barrel 10 and a plunger rod 20 slidably disposed in the syringe barrel 10. A balloon 30 for extruding the drug is provided at the front end of the plunger rod 20. An air inlet 21 for the inflation device 1 to intake air is provided at the rear end of the plunger rod 20. A threaded interface 40 for docking with the inflation device 1 is also provided at the rear end of the plunger rod 20. The balloon 30 is sealed at the front end of the plunger rod 20 and the balloon 30 is communicated with the air inlet 21 through an air supply channel 20a.

[0017] One end of the syringe barrel 10 is provided with an injection end 11, the other end of the syringe barrel 10 is an open end 12, and a handle 13 convenient for nurses to operate is provided on the outer periphery of the open end 122.

[0018] In order to reduce the resistance of pulling out the plunger rod and provide a sealing effect, a sealing member 50 is provided on the inner wall of the syringe barrel 10. The sealing member 50 in this embodiment is preferably a siliconized sealing ring.

[0019] The working principle of the present invention is as follows:

[0020] After the drug is drawn, the inflation device 1 is connected to the threaded interface 40 at the rear end of the plunger rod 20. The air is supplied by the inflation device 1 and enters the air supply channel 20a through the air inlet 21 to inflate the balloon 30. When the balloon is inflated, the drug in the syringe barrel 10 is extruded.

[0021] The above has shown and described the basic principles, main features and advantages of the present utility model. Those skilled in the art should understand that the present utility model is not limited by the above embodiments. What is described in the above embodiments and the specification only illustrates the principles of the present utility model. Without departing from the spirit and scope of the present utility model, the present utility model will have various changes and improvements, and these changes and improvements all fall within the scope of the present utility model claimed. The scope of protection claimed by the present utility model is defined by the appended claims and their equivalents.

Claims

1. A silicone-free syringe, comprising a barrel and a plunger slidably disposed within the barrel, characterized in that, A balloon for extruding medicine is provided at the front end of the core rod. An air inlet for an inflation device is provided at the rear end of the core rod. A threaded interface for docking with the inflation device is also provided at the rear end of the core rod. The balloon is sealed at the front end of the core rod and the balloon is communicated with the air inlet through an air supply channel.

2. The silicone-free syringe according to claim 1, wherein, One end of the syringe is provided with an injection end, and the other end of the syringe is an open end. A handle for facilitating the operation of nursing staff is provided on the outer periphery of the open end.

3. The silicone-free syringe according to claim 1, wherein, A sealing member for reducing the pulling resistance of the core rod and improving the sealing performance is provided on the inner wall of the syringe.

4. The silicone-free syringe according to claim 3, wherein, The sealing member is a siliconized sealing ring.

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