Patent ID: 8267282

Claim:
A quantitative dropper structure comprising: a resilient bottle body being compressible and having a bottle opening at a top end thereof; a nozzle detachably and sealingly connected to the bottle opening, the nozzle being formed with a liquid reservoir for containing a liquid therein, the nozzle being transparent or translucent for a user to observe and check the volume of the liquid contained in the nozzle, the nozzle having a tip formed with a dispensing orifice, the nozzle further having a bottom wall formed with a perforation; and a transfer mechanism received in the bottle body and connected to the nozzle, the transfer mechanism having a flow path formed of a first transfer pipe, a remaining liquid reservoir and a second transfer pipe, wherein: the remaining liquid reservoir is formed with an internal remaining liquid chamber for containing remaining liquid therein; the first transfer pipe is positioned outside the remaining liquid reservoir, a top end of the first transfer pipe being connected to the remaining liquid reservoir in communication with the remaining liquid chamber, a bottom end of the first transfer pipe downward extending to a position near a bottom section of the bottle body; and the second transfer pipe at least has a front end and a rear end, the front end passing through the perforation of the bottom wall of the nozzle and extending into the liquid reservoir thereof, the rear end extending into the remaining liquid reservoir to a position near the bottom wall thereof in communication with the remaining liquid chamber, whereby when compressing the bottle body, the liquid is driven to forward flow in the flow path into the liquid reservoir of the nozzle, after a necessary dose of liquid is contained in the liquid reservoir of the nozzle, the liquid is quantitatively dispensed from the dispensing orifice at constant amount.