JIDOENSOPIANONODAKENKENSHUTSUSOCHI

摘要

PURPOSE:To adjust the position of the detector to detect keying corresponding to the bend of a pedestal and to prevent electromagnetic waves generated at a circuit board fitted the detector from being leaked to the outside. CONSTITUTION:A long sensor rail 12 to support a sensor base 11 fitted a sensor 9 to detect keying is composed of a flexible metal plate and fitted to a 1 by using wooden screws 18 against the pressure of a spring 19 to press the sensor rail 12 upward, and the fastening of the wooden screws 18 is adjusted so that the sensor rail 12 can be along the bend of a loading face of a shelf plate 17 or the 1. Further, a lid-shaped or sheet-shaped shield member to reflect or absorb electromagnetic waves is fitted to the sensor rail 12 so as to cover the surface of the sensor base 11 or the entire sensor base 11.