Saliva collector with exhaust function and injection molding process thereof

Abstract

The invention discloses a saliva collector with an exhaust function and an injection molding process thereof; a collection funnel is composed of a funnel and a connecting sleeve provided with an internal thread, a collection tube is provided with an external thread corresponding to the internal thread, and the internal thread and the external thread are non-sealing tube threads; the upper end opening of the connecting sleeve is fixedly connected to the periphery of the outer wall of the lower portion of the funnel in the circumferential direction, a plurality of annularly-distributed limiting blocks are arranged around the periphery of the outer wall of the lower portion of the funnel, and a notch is formed between every two adjacent limiting blocks; the limiting block is located between the upper end opening of the connecting sleeve and the top of the internal thread, and the position of the lower edge of the limiting block is higher than the position of the funnel outlet, so that the funnel outlet extends downwards to the position below the notch. The notch and the internal and external threads form an exhaust channel, so that unsmooth exhaust cannot be caused. The liquid is effectively prevented from being discharged along with the gas while the gas is exhausted, and the production cost is hardly increased. And the production rejection rate is not higher than one hundred thousandth through a specific injection molding process parameter system.

Description

technical field

[0001] The invention relates to a saliva collector. Background technique

[0002] Saliva sample collection is a method of obtaining DNA / RNA that is harmless and painless to the human body. This method will not cause any discomfort to the person being collected, and is easily accepted, so it can maximize the scope of sampling for genetic research. Existing saliva collectors are made of injection-molded collection funnels and collection tubes, and the collection funnels and collection tubes are tightly connected by threads. Before use, the preservation solution should be poured into the collection tube. The saliva collected by the collection funnel flows into the collection tube and mixed with the preservation solution. It can be stored at room temperature for a long time to ensure that the DNA / RNA of the saliva sample is not damaged. After the collection is completed, the collection funnel is removed and treated as medical waste, and the collection tube is s...

Images