WEIGHT FOR MOVABLE MEMBER, AND MOVABLE MEMBER

摘要

PROBLEM TO BE SOLVED: To provide a weight for a movable member which can surely be fitted in a fitting hole bored in the movable member of a keyboard device, and the movable member.;SOLUTION: The weight 12 is fitted in the fitting hole bored in a primary key board 11 in surface contact. This weight 12 is made of iron with rigidity; and 7 and more groove portions 14 comprising valley portions 14b and projection portions 14a which face in a direction nearly orthogonal to the direction of insertion into the fitting hole and are set to a ≤2 mm pitch are formed on the peripheral surface in the insertion direction and surfaces of the projection portions 14a in the insertion directions are curved. Further, the depth of the groove portions 14 are set to ≥0.2 mm, and 10 or more grooves 14 are formed for a 10 mm length of the weight 12 in the insertion direction.;COPYRIGHT: (C)2007,JPO&INPIT