Importance

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Abstract

There is provided a load sensor that can make accurate measurement without being affected by unnecessary external force and moreover has a simple construction. The load sensor includes a strain generating element (3) which is formed integrally with an installation section (9) attached to an object to be measured and is displaced according to the weight or load of the object to be measured, a sensor plate (13) which is connected to the strain generating element (3) and is distorted according to the displacement of the strain generating element (3), and a strain gauge attached to the sensor plate (13). The strain generating element (3) is placed on one end side of the installation section (9) with the center thereof aligned with the axis of the installation section (9). On the inside of the strain generating element, a reception section (5) for housing the sensor plate is formed, and the sensor plate (13) is housed in the reception section while being held by a holder (100). At this time, the sensor plate (13) is connected to the center of the strain generating element (3) with the center thereof aligned with the axis of the installation section (9) and the center of the strain generating element (3). On the other hand, an outer peripheral edge (13b) of the sensor plate (13) is held by an inner peripheral edge (100a) of the holder (100), and an outer peripheral surface (100b) of the holder (100) is joined to an upright wall at the outer edge of the reception section (5). The holder (100) preferably has a cushioning function.

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First Claim