Filter syringe

Abstract

The present invention relates to a filter syringe and, particularly, to a device improving a syringe having a filter means for filtering foreign material such as the glass fragments of an ampoule, soas to prevent the foreign material from being injected together with a liquid medicine and, particularly, to smoothly suction and inject the liquid medicine with less power even if the filter means having a fine air hole size is applied. A known syringe, comprising a syringe needle (10), a cylinder (20), and a plunger (30), comprises: a suction passage including a known one-way valve means (300),and formed to reach the cylinder (20) from a hollow cap (100) having a tip; and an injection passage formed to reach the syringe needle (10) from the cylinder (20), and including a detachable openingand closing means (400) for selectively opening and closing the syringe needle (10), and a filter means (200) for filtering the foreign material from the liquid medicine, wherein the injection passageand the suction passage share a part or the injection passage is formed independently of the suction passage such that a passage, which reaches the syringe needle (10) from the filter means (200), ofthe injection passage is formed independently of the suction passage and the filter means is provided in the injection passage so as to prevent the foreign material from being injected together withthe liquid medicine, and even if the filter means having a fine air hole size is applied, the liquid medicine can be more smoothly suctioned and injected such that the user convenience and the marketability of the syringe are maximized.

Description

technical field [0001] The present invention relates to a filter syringe, especially to a syringe equipped with a filter mechanism for filtering foreign matter such as ampoule glass shards, so as to prevent the foreign matter from being injected together with the liquid medicine. The filter mechanism of the air hole size can also gently suck and inject the liquid medicine with less force. The device is equipped with a filter mechanism in the injection channel to prevent foreign matter from being injected together with the liquid medicine. The filter mechanism with small pore size can also absorb and inject the liquid medicine more smoothly, thus maximizing the user's convenience and the commerciality of the syringe. Background technique [0002] Generally, a syringe is a device for injecting a liquid medicine into the body of an animal or a plant, and is manufactured so that a sharp end can penetrate the skin and inject a liquid medicine into any tissue. [0003] figure 1 ...

AI Technical Summary

Problems solved by technology

[0012] However, in this conventional syringe with a filter cap, since the injection liquid passes through the filter 41 provided in the cap 40, it can only be sucked into the cylinder body 20 through the fine injection needle 10, and a large force is required to suck the injection liquid. , so there is a problem in the prior art that it is very inconvenient to use

[0013] Not only that, in terms of the current situation, the problem that has occurred is that with the application of fine pore size filters in recent years, even if the plunger 30 is retracted to cause a negative pressure to act on the cylinder 20 to become a vacuum state, the liquid medicine It also cannot pass through the filter with fine pore size, which will cause the inhalation of the liquid medicine is not smooth

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