Reaction chamber used for in-vitro diagnosis device and with cucurbit-shaped opening

The invention discloses a reaction chamber used for an in-vitro diagnosis device and with a cucurbit-shaped opening. The reaction chamber comprises a chamber body, the chamber body comprises a chamber room and a chamber bottom, the inner contour of the cross section of the upper end portion of the chamber room is a cucurbit-shaped contour formed by connecting a major-diameter arc segment and a minor-diameter arc segment, the upper sidewall of the chamber room has a cylindrical structure, the inner contour of the lower sidewall of the chamber room is an inverted truncated cone structure or bowl-shaped structure with large top and small bottom, and the chamber bottom is an arc bottom; and an enrichment chamfer wall extending from the upper sidewall to the lower end of the lower sidewall is chamfered on the sidewall of the chamber room, the lower end of the enrichment chamfer wall is arranged oblique to the middle axis of the chamber bottom, and an enrichment device is arranged on the lower sidewall of the chamber room. The reaction chamber has the following advantages: the reaction chamber has a simple structure and is convenient to use; the chamber bottom is the arc bottom, so vortex is convenient; the lower sidewall is the inverted truncated cone structure or the bowl-shaped structure, so buffer effect and convenient vortex are realized; and the wall thickness is consistent, so reaction reagents are uniformly heated, the enrichment distance is short, and the enrichment time is shortened, thereby the detection efficiency is improved.