Patent ID: 8596162

Claim:
A pedal-operated operation device comprising: an operating element to be foot-operated to provide an operating force on the operating element; support means for supporting the operating element such that the operating element can undergo relative displacement relative to the support means; and a first friction surface pair and a second friction surface pair, each of which includes paired friction surfaces for generating a resistance force against the relative displacement of the operating element by a friction force generated between the paired friction surfaces and which differ from each other in coefficient of static friction, wherein the first or second friction surface pair higher in coefficient of static friction includes a displacement member which allows the first or second friction surface pair higher in coefficient of static friction to move together with the operating element in association with the relative displacement thereof in response to the operating force being greater than a maximum static friction force of the first or second friction surface pair lower in coefficient of static friction and being equal to or less than a maximum static friction force of the first or second friction surface pair higher in coefficient of static friction.