| 摘要 |
PROBLEM TO BE SOLVED: To obtain a seal structure which exerts no adverse influence on characteristics of an elastic body. SOLUTION: A recessed part 17 is formed in a cylindrical hole 12 of a strain inducer 11 and a strain gauge 18 and a circuit element are stuck in the recessed part 17. A thin cylindrical body 19 is inserted covering the recessed part 17 and brought into contact at the circumference of the end part of the cylindrical hole 12. Bellows 20 are formed on both the sides of the thin cylindrical body 19 except the center part and even when the point of a load on a load cell elastic body moves from the center part and a shearing force due to the torsion of the cylindrical body 19 is generated, the cylindrical body 19 has a flexible structure because of the presence of the bellows 20 to exert no influence on the elastic characteristics of the strain inducer 11, so that the measurement precision of the strain gauge 18 as a load cell will not be made worse.
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