Patent ID: 8646343
Filing Date: 2014-02-11
Classification: B01L

Abstract:
1. A pipette device which includes: a pipette main body having a cylinder portion; a plunger disposed in an inserted state in the cylinder portion to be movable in an axial direction and changing a cylinder volume; a push rod which is inserted in the pipette main body to be rotatable and movable in the axial direction and to which the plunger is connected; and a nut supported in the pipette main body to be unrotatable and movable in the axial direction and converting the rotation of the push rod to the axial-direction movement of the push rod, and which adjusts the cylinder volume by the axial-direction movement of the plunger caused by the rotation of the push rod, the pipette device comprising a speed increasing mechanism provided between the pipette main body and the push rod, the speed increasing mechanism being of a planetary gear type that includes: a sun gear, planetary gears, a carrier and an outer ring and the speed increasing mechanism increasing a speed of rotation input to transmit the rotation with the increased speed to the push rod, the carrier has a holding portion in a bottomed cylindrical shape supporting the planetary gears so as to allow the planetary gears to rotate; a projecting portion integrally formed with the holding portion and projecting out in the axial direction from the pipette main body, and an input member is fitted to the projecting portion.