Operating element device
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United States of America Patent
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Feb 23, 2016
Grant Date -
Apr 2, 2015
app pub date -
Sep 9, 2014
filing date -
Sep 27, 2013
priority date (Note) -
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Abstract
A key (11) is supported by key supporting portions (32) so that the key (11) can pivot. A reaction force generation member (22) is shaped like a dome to be elastically deformed by a key-depression of the key (11). At the time of the elastic deformation, the reaction force generation member (22) increases a reaction force from the beginning with an increasing amount of elastic deformation. After the reaction force reaches its peak, the reaction force generation member (22) buckles to reduce the reaction force. A normal line of a plane (P1) including a pivot axis (C) of the key (11) and a depression point of a depression portion (11a) is designed to be roughly parallel to an axis line (Y1) of the reaction force generation member (22) at the point in time when the reaction force of the reaction force generation member (22) reaches its peak.
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