Dispensing syringe with low residual medicine liquid
A technology for syringes and medicinal liquids, applied in the field of medical devices, can solve the problems of residual medicinal liquids in the syringes, unable to meet requirements, large gaps, etc.
Inactive Publication Date: 2016-05-25
上海宝舜医疗器械有限公司 +2
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AI Technical Summary
Problems solved by technology
Therefore, some problems have arisen: 1. A gap is formed between the upper end of the sealing protrusion and the syringe, causing too much liquid medicine in the syringe; 3. There is a large gap in the connecting column connecting the needle at the front end of the syringe, resulting in residual medicine
Most of the dispensing injection needles currently on the market cannot meet the requirements
Method used
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Embodiment Construction
[0011] The structural features of the present invention will be further described below in conjunction with the accompanying drawings and specific embodiments.
[0012] like figure 1 A dispensing syringe with low drug liquid residue is shown, including a syringe assembly and a piston assembly, the syringe assembly includes a syringe main body 1, a connecting column 2 connecting the needle, and a syringe handle; the piston assembly includes a 3 piston rod 4 and piston handle; the side wall of the piston 3 is provided with at least one ring of sealing ribs 5; when the piston 3 is pushed to the top, the sealing ribs 5, the upper end surface of the piston 3 and the syringe body The gap formed between 1 is the liquid storage part 6; the syringe main body 1 is provided with an extruding part 7 matching the shape, size and position of the liquid storage part 6.
[0013] The extrusion part 7 is integrally formed through a mold during the production of the syringe main body 1 .
[00...
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The invention discloses a dispensing syringe with low residual medicine liquid. The dispensing syringe comprises a needle cylinder assembly and a piston assembly; the needle cylinder assembly comprises a needle cylinder main body, a connecting column connected with a needle and a needle cylinder handle; the piston assembly comprises a piston rod with a piston and a piston handle; the side wall of the piston is provided with at least one ring of sealing convex arris; when the piston is pushed to the top end, a gap formed among the sealing convex arris, the upper end face of the piston and the needle cylinder main body serves as a liquid storage portion; the needle cylinder main body is provided with an extrusion portion of which the shape, size and position are matched with those of the liquid storage portion. The dispensing syringe has the following advantages that by improving the needle cylinder main body and arranging the extrusion portion matched with the liquid storage portion in the needle cylinder main body, the residual medicine liquid in the liquid storage portion can be effectively extruded out of the needle cylinder, and the low residual medicine liquid purpose is achieved; by arranging the extrusion rod on the upper end face of the piston, medicine liquid in the connecting column is extruded out of the needle cylinder main body, and the low residual medicine liquid purpose is achieved.
Description
technical field [0001] The invention relates to a medicine dispensing injection device, in particular to a medicine dispensing syringe with low liquid medicine residue, belonging to the technical field of medical instruments. Background technique [0002] Common dispensing, anesthesia and injection apparatus in the market, majority adopt syringe, and syringe generally comprises syringe, syringe handle, piston rod with piston and piston handle. During the retraction of the piston rod, a negative pressure is formed in the syringe, thereby sucking the liquid medicine into the syringe; when the piston rod is pushed forward, the piston squeezes the liquid medicine out of the syringe. Considering the tightness of the piston, a ring of sealing protrusions is arranged on the side wall of the existing piston, which has increased the tightness of the piston and the syringe. Therefore, some problems have arisen: 1. A gap is formed between the upper end of the sealing protrusion and th...
Claims
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IPC IPC(8): A61M5/178A61J1/20
Inventor 邹小龙魏智娟
Owner 上海宝舜医疗器械有限公司