Flexure element where the gap between the first arm and the second arm or between an arm and the strain generating region are equal to or smaller than one half the thickness

摘要

A flexure element used in a load cell comprises a rectangular strain region, two first arms, a first connection portion, which is connected to one end of the strain region and the first arms, two second arms, and a second connection portion which is connected to the other end of the strain region and the second arms, wherein one of the pair of first arms and the pair of second arms receives a load in a direction perpendicular to the flexure element, and the other of the pair of first arms and the pair of second arms is fixed to a support body, and a gap between the first arm and the second arm and a gap between the second arm and the strain region are equal to or smaller than a half of the thickness.

主权项

1. A flexure element which is used in a load cell measuring a weight, is deformed by a load transferred thereto, is formed by powdered metallurgy, and has an axisymmetric shape and an even thickness, the flexure element comprising:
a rectangular strain region which is disposed at the center, extends in the same direction as that of the symmetric axis, and has one end and the other end;two first arm portions which extend in parallel to the symmetric axis;
a first connection portion which extends in a direction crossing the symmetric axis and is connected to one end of the strain region and the first arm portions;two second arm portions which are disposed near the strain region in relation to the first arm portions and extend in parallel to the symmetric axis; and
a second connection portion which extends in a direction crossing the symmetric axis and is connected to the other end of the strain region and the second arm portions, wherein one of the pair of first arm portions and the pair of second arm portions receives a load in a direction perpendicular to the flexure element, and the other of the pair of first arm portions and the pair of second arm portions is fixed to a support body, and a gap between the first arm portion and the second arm portion or a gap between the second arm portion and the strain region are equal to or smaller than a half of the thickness.