Patent ID: 9122300
Filing Date: 2015-09-01
Classification: F16H,G05G,Y10T

Abstract:
1. A rotary operation device comprising: a rotary operation member rotated around a rotation axis; a rotation detector detecting rotary operation of the rotary operation member; and a rotational force transmission member transmitting, to the rotation detector, a rotational force generated in association with the rotary operation of the rotary operation member, the rotary operation member comprising: the rotational force transmission member comprising: one of the rotary operation member and the rotational force transmission member comprises a first interference portion provided in a portion displaced in a rotation direction in accordance with rotation thereof and having a shape that interferes with the other of the rotary operation member and the rotational force transmission member, so as to prevent assembly with the other member in a position misaligned from a proper engagement position where the first gear and the second gear are engaged in a proper phase relationship, and the other member comprises a second interference member and an escape portion, the second interference member being provided in a portion displaced in a rotation direction in accordance with rotation thereof and having a shape that interferes with the first interference portion so as to prevent assembly with the one member in a position where the first gear and the second gear are misaligned from the proper engagement position, the escape portion having a shape that receives the first interference portion when the first gear and the second gear are provided in the proper engagement position so as to prevent interference with the first interference portion and allow assembly with the one member, and that prevents interference with the first interference portion when the rotary operation member and the rotational force transmission member are rotated relative to each other in a state where the first gear and the second gear are assembled in the proper engagement position, the first interference portion is a projection projecting radially outwardly from the rotation axis to a position radially inward of an outer periphery of the gear of the one member, and the second interference portion is a projection projecting radially outwardly from the rotation axis to a position outward of an outer periphery of gear teeth of the gear of the other member.