| 摘要 |
PROBLEM TO BE SOLVED: To provide a thermal overload relay always acquiring an approximately single setting current adjustment value to the screwed position of an adjusting screw regardless of the rotating direction of the adjusting screw. SOLUTION: The thermal overload relay comprises a contact opening/closing mechanism for opening/closing a fixed contact and a movable contact installed in a housing; an interlocking bar displaced according to a current value of a main circuit; an adjusting mechanism installed in a swingable manner in the housing and transmitting the displacement of the interlocking bar to the contact opening/closing mechanism to operate the contact opening/closing mechanism and also adjusting the setting current value of a main circuit for operating the contact opening/closing mechanism by swinging displacement; the adjusting screw screwed penetrating a housing wall and swinging the adjusting mechanism according to the screwing quantity. A recess is formed at the tip part of the adjusting screw, and a spherical body is held between the recess and the adjusting mechanism. COPYRIGHT: (C)2007,JPO&INPIT
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