Abstract: A keyboard unit includes a frame; a first member connected to the frame, a rigidity of the first member in a first direction being lower than a rigidity of the first member in a second direction intersecting with the first direction; and a mounted member. The mounted member includes a first pressing portion configured to suppress a movement of the first member in the first direction by pressing a part of the first member in the second direction, and a positioning portion configured to suppress a movement of the mounted member with respect to the frame in the first direction.

Abstract: A pivot mechanism includes: a shaft portion; a bearing configured to contact the shaft portion and pivot about a pivot axis; and a reinforcement protruding from an outer circumferential surface of the shaft portion. The outer circumferential surface includes a first region contactable by the bearing in a range of its pivotal movement and a second region not including the first region in a region opposed to the first region via the pivot axis. The reinforcement extends from at least a portion of the second region to an outside of the bearing in a pivot-axis direction.

Abstract: A pivot mechanism includes: a shaft portion; a bearing configured to contact the shaft portion and pivot about a pivot axis; and a reinforcement protruding from an outer circumferential surface of the shaft portion. The outer circumferential surface includes a first region contactable by the bearing in a range of its pivotal movement and a second region not including the first region in a region opposed to the first region via the pivot axis. The reinforcement extends from at least a portion of the second region to an outside of the bearing in a pivot-axis direction.

Abstract: An information input apparatus comprises a casing which is held by an operator by opposite end portions thereof. At least one selection operating element is arranged on the front surface of the casing at a location close to one end thereof for selecting a kind of data to be input. At least one value-input operating element is arranged in the front surface of the casing at a location close to another end thereof, for inputting a value of the kind of data selected by the selection operating element. The value of the selected kind of data input is stored. The selection operating element is inclined relative to an edge of the one end of the casing, and the value-input operating element is inclined relative to an edge of the another end of the casing. The apparatus is compact and provides efficient inputting of information such as performance data for an electronic musical instrument.