REQUIREMENTS FOR AUTOMATICAL REGULATION OF THE DRUG CONCENTRATION IN ELECTRICAL PRE-FILLED DRUG EQUIPMENT

摘要

PCT No. PCT/KR96/00068 Sec. 371 Date Aug. 7, 1997 Sec. 102(e) Date Aug. 7, 1997 PCT Filed May 7, 1996 PCT Pub. No. WO97/20488 PCT Pub. Date Jun. 12, 1997A device for automatically locking or unlocking the pressure lid in electric pressure cookers is disclosed. In the above device, a drive gear which is fixed to the output shaft of a reversible motor gears into a spur gear of the lock ring. A contact protrusion which is provided on the peripheral edge of the lock ring selectively comes into contact with either lock or unlock sensing switches in accordance with a rotating motion of the lock ring, thereby turning on the switch and automatically locking or unlocking the inward protrusions of the lock ring relative to the outward protrusions of the pressure lid. The above device is thus convenient to the user. The device does not have any handle lever exposed outside the cooker, thus neither causing a difficulty in packing the cooker nor spoiling the appearance of the cooker.