Patent ID: 8889975

Claim:
A keyboard apparatus, comprising: a key configured to be pivotable about a key fulcrum, by a depressing operation and a release operation, between: a pivotal movement start position corresponding to a non-key depression state; and a pivotal movement end position corresponding to a key-depression end state; a hammer body configured to be pivotable about a hammer body fulcrum, by the depressing operation and the release operation of the key, between: a pivotal movement start position corresponding to the non-key depression state; and a pivotal movement end position corresponding to the key-depression end state and configured to impart inertia to the depressing operation of the key; and an elastic portion configured to be capable of applying an elastic force to at least one of the key and the hammer body, wherein the elastic portion is configured not to apply the elastic force to the key and the hammer body in the non-key depression state and configured to start to apply the elastic force in a direction toward the pivotal movement start position to the at least one of the key and the hammer body from a certain point in a forward stroke of the depressing operation of the key.