Press type blood collection needle device

Abstract

The invention discloses a press type blood collection needle device which comprises a shell, a sliding sleeve and a needle body. A needle head is arranged at the front end of the needle body. A first guide limiting channel where the sliding sleeve axially moves is arranged in an inner cavity of the shell and enables the front end of the sliding sleeve to stretch out of the shell. A second guide limiting channel where the needle body axially moves is arranged in the sliding sleeve and enables the needle head to stretch out of the front end of the sliding sleeve. The needle body is provided with an elastic expanding arm which expands towards the front end of the inner cavity of the shell. The rear wall of the sliding sleeve is provided with a notch groove used for limiting the end of the elastic expanding arm during assembling. A disengagement rod which is used for enabling the elastic expanding arm on the needle body to be disengaged from the notch groove and to enter the second guide limiting channel when the front end of the sliding sleeve retracts into the shell is arranged in the shell. A spring used for pushing the needle body to move forwards so as to enable the needle head to pierce out of the shell from the front end of the sliding sleeve is arranged between the needle body and the bottom of the inner cavity of the shell. The press type blood collection needle device is simple in structure, easy to obtain, convenient to assemble and safe to use, and is provided with a small number of components.

Description

[technical field] [0001] The invention relates to a push-type blood collection needle device. [Background technique] [0002] At present, domestic conventional medical blood collection generally uses a blood collection pen with a disposable blood collection needle. When this blood collection device is in use, the disposable blood collection needle is installed on the head of the blood collection pen, and the disposable blood collection needle is removed after launching. Put on a new blood collection needle and use it again. Since the blood collection needle is repeatedly used, it is easy to cause cross-infection among many people. [0003] The Ministry of Health of my country currently stipulates that when collecting peripheral blood clinically, one person must collect one amount, and multiple people should not share it. However, this disposable blood collection device also has a problem. The disposable blood collection needle is fired once, and it pops out of the blood coll...

AI Technical Summary

Problems solved by technology

[0002] At present, domestic conventional medical blood collection generally uses a blood collection pen with a disposable blood collection needle. When this blood collection device is in use, the disposable blood collection needle is installed on the head of the blood collection pen, and the disposable blood collection needle is removed after launching. Install a new blood collection needle and use it again. Since the blood collection needle is reused many times, it is easy to cause cross-infection among multiple people.

[0003] The Ministry of Health of my country currently stipulates that when collecting peripheral blood clinically, one person must collect one amount, and multiple people should not share it. However, this disposable blood collection device also has a problem. The disposable blood collection needle is fired once, and it pops out of the blood collection pen after the puncture. And it cannot be retracted. The needle tip after use is exposed outside and needs to be pulled out manually. Since the needle is exposed after blood collection, it is easy for the staff to accidentally pierce it during handling, which will cause cross-infection and there is a certain risk. Security risks

Therefore, various disposable blood collection pens with retractable needles after use have appeared in the prior art, such as the Chinese invention patent "Disposable Safety Blood Collection Needle" with application number 03141465.6, and the Chinese invention patent with patent number ZL200410064671.0 "Needle Point Retractable Disposable Safety Blood Collection Needle and One-shot Safety Blood Collection Pen" both disclose a disposable blood collection needle whose needle head can be retracted after firing, but the structure of the blood collection needle of the above-mentioned patent is not compact enough, and the parts involved There are relatively many parts. For example, in the latter patent, it needs to be used with a blood collection pen at the same time, and the structure is relatively complicated.

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