A firing control mechanism for a biopsy needle and a biopsy needle

Abstract

This invention relates to the field of medical device technology, specifically to a firing control mechanism for a biopsy needle and the biopsy needle itself. The firing control mechanism includes at least a blocking part, a clearance groove, and an elastic arm. The blocking part is located on the front side of the inner needle slider, near the outer needle slider. The clearance groove is located near the proximal end of the blocking part, with a height difference between the clearance groove and the blocking part. One end of the elastic arm is fixedly mounted, and the free end of the elastic arm has a protrusion facing the blocking part. In the wound state, the protrusion is located between the first button and the blocking part. After the inner puncture needle is fired, until it stops moving or is about to stop moving, the protrusion enters the clearance groove. With this firing control mechanism, the firing interval between the inner and outer puncture needles is no longer affected by human operation, ensuring that the outer puncture needle is fired only after the inner puncture needle stops moving or is about to stop moving, thereby guaranteeing a high sampling success rate.

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