Patent ID: 9412538
Filing Date: 2016-08-09
CPC Classification: H01C,H01H

Claim Text:
1. A rotary operation type electronic component comprising: a columnar control shaft; a shaft supporter having a circular through shaft hole into which the control shaft is inserted; an electrical signal control section which is attached to one end of the shaft supporter and allows an electrical signal to be controlled by rotary operation of the control shaft; and a cylindrical spring which is held to encircle the outer periphery of the control shaft, in a spring holding space formed between the outer periphery of the control shaft and the inner periphery of the through shaft hole, and has a ring shape with an opening cut in the direction of the central axis; the cylindrical spring comprising a plurality of leaf spring portions which extend in the direction of the central axis of the control shaft, are connected together in the circumferential direction of the control shaft, and are arranged on the outer periphery of the control shaft; the plurality of leaf spring portions having curved projection portions formed by curving their central areas in the length direction to project toward the same side, which is the radially inner or outer side of the cylindrical spring, being placed resiliently between the outer periphery of the control shaft and the inner periphery of the through shaft hole, and being given radially opposite pressing forces at both end portions of the leaf spring portions and the curved projection portions.