Patent ID: 6563060
Filing Date: 2003-05-13
Classification: G01G

Abstract:
An electronic balance comprising a first Roberval mechanism for supporting a fixed pillar by a movable pillar through an upper and a lower beam parallel with each other to support a weighing dish by the movable pillar and transmit a load working on the weighing dish to an electrical-load detecting section through the movable pillar, whereina second Roberval mechanism is included which is provided with an upper and a lower beams extending in a direction almost orthogonal to the beams of the first Roberval mechanism and parallel with each other, and a movable pillar of the second Roberval mechanism is integrated with the movable pillar of the first Roberval mechanism, the first Roberval mechanism is housed in a square pipe along the axial direction of the square pipe and the second Roberval mechanism is set to an end of the square pipe, a flexible portion weak in torsion about the axis of the first Roberval mechanism and rigid in axial-directional one-sided load is formed on the first Roberval mechanism, and a flexible portion flexible in tilt direction of the first Roberval mechanism due to the axial-directional one-sided load of the first Roberval mechanism is formed on the second Roberval mechanism.