| 摘要 |
<p>PURPOSE:To obtain the structure by which the knob can be attached without causing eccentricity at the time of attaching it to the shaft of a variable resistor by fitting the boss of a knob bearing part into a hole of the shaft by clearance fit at the time the knob is attached to the shaft. CONSTITUTION:A shaft 1 of a variable resistor is constituted of a shaft 1a of the shaft of a column, and a shaft 1b of the part formed by cutting the column in the axial direction. Also, in a bearing part 6, a notch 12 is provided on the opposite side of a boss 8. In a state that a knob 5 is attached to the shaft 1, the notch 12 of the bearing part is opened, but force for returning to the origin always works by elasticity, and by this force, the shaft 1 is tightened, and the bearing part 6 can be fixed to the shaft 1. A boss 10 of the knob 5 is fitted into a hole 2 of the shaft by clearance fit. When the knob 5 is pushed in fully, the tip 13 of the shaft 1 comes into contact with the inside surface of the bearing part 6, and it opened to the outside in the tip part of the bearing part 6. Accordingly, between 6 and 1, a clearance 14 and a clearance 15 are generated, but dimensions of 14 and 15 come to equal. That is, the knob 5 is attached to the shaft 1 without causing eccentricity.</p> |
