Pivot member and keyboard apparatus

A pivot member hammer assembly for an action mechanism of a keyboard instrument, the hammer assembly being provided corresponding to a key of a plurality of keys in the keyboard instrument and arranged in a pivot-axis direction,

• the hammer assembly comprising:
• a connecting surface, at least a portion of which comprises a flat surface, the flat surface and a hammer body portion being disposed so as to be opposed to each other;
• and
• at least one surface different from the flat surface, a first identifier and a second identifier being provided on the at least one surface, the first identifier being visually recognizable from the pivot-axis direction, the second identifier being visually recognizable from the pivot-axis direction and a direction orthogonal to the pivot-axis direction,
• wherein the hammer assembly includes a first recessed portion in the at least one surface on which the first identifier is provided, and
• wherein the first identifier and the second identifier are associated with the key of the keyboard instrument.

A keyboard apparatus comprising:

• a frame;
• a plurality of keys pivotably disposed on the frame;
• and
• a plurality of hammer assemblies, each hammer assembly arranged respectively corresponding to the plurality of keys, each hammer assembly including:
• a hammer body portion configured to pivot about a pivot axis;
• and
• a weight portion comprising a connecting surface, at least a portion of which comprises a flat surface, the weight portion being disposed such that the flat surface and the hammer body portion are opposed to each other, the weight portion comprising at least one surface different from the flat surface, a first identifier and a second identifier being provided on the at least one surface, the first identifier being visually recognizable from a first direction orthogonal to the flat surface, the second identifier being visually recognizable from the first direction and from a second direction in which the first identifier is not visually recognizable,
• wherein the weight portion includes a first recessed portion in the at least one surface on which the first identifier is provided, and
• wherein the first identifier and the second identifier are associated with a key of the keyboard apparatus,
• wherein a position of the pivot axis with respect to the frame is fixed, and
• wherein each of the plurality of hammer assemblies respectively corresponding to the plurality of keys pivots in response to pivotal movement of a corresponding one of the plurality of keys.