Keytop component, operation key, and electronic device

A keytop component for use in a keytop support member to press a key switch when the keytop component is pressed down, the keytop component comprising:

• a base member mounted upon said keytop support member;
• and
• a keytop member mounted upon said base member,
• said keytop member including:
• a first surface configured to be pushed by a user;
• a second surface configured to abut a surface of said base member;
• and
• a pair of resilient engagement members that protrude beyond the second surface,
• said base member including:
• a pair of engagement receiving parts to be engaged by the pair of engagement members so as to detachably hold the keytop member;
• a locking section to lock the base member to the keytop support member;
• and a projection member extending downward under the base member and configured to press the key switch when the base member is pressed down,
• each of said engagement members including, at a tip end part thereof including a tip end of said engagement member, an engagement part for engagement with one of said engagement receiving parts corresponding thereto, said engagement part including a first sloped surface extending from said tip end toward a root part of said engagement member and a second sloped surface formed behind said first sloped surface when viewed from said tip end of said engagement member, such that said first and second sloped surfaces form together a trapezoidal shape for said engagement part such that said engagement member increases a thickness thereof in correspondence to said first sloped surface in a direction from said tip end toward said second sloped surface and decreases the thickness thereof in correspondence to said second sloped surface in a direction from said first sloped surface to said root part of said engagement member,
• said locking section including a hook engaging with a rear surface of said keytop support member at a side of said keytop support member away from a side facing said base member.