| 摘要 |
PROBLEM TO BE SOLVED: To provide a highly reliable load sensor wherein a fastening force for mounting a fixed end part does not adversely affect the characteristics of strain detection elements and product-by-product variations in performance are reduced. SOLUTION: This load sensor is designed so that part of an opening 3 stands among the strain detection elements 7 and 8 mounted on straining parts 4 and the center 'A' of a shaft hole 2a in an attachment part 2 on the fixed end side. This prevents the elements 7 and 8 from being directly affected by a deformation owing to a strong fastening force that presses peripheral parts of the shaft hole 2a, thus preventing the characteristics of the elements 7 and 8 from varying on a product-by-product basis. A projection 6b projecting in the wall thickness direction is provided on an end part of a pressure receiving part 6 and a top part of this projection part 6b is used as a load point 6a. Even if the relative distance between an object of measurement and the load sensor varies to some extent, the load of the object of measurement can be surely exerted on the load point 6a. Accordingly, malfunction can be avoided even if there is some error in the attaching position of the load sensor.
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