Day display apparatus and watch having the same

摘要

The present invention aims to provide a day display apparatus having less risk of occurrence of a day hopping even when an impact caused by a drop or the like is applied and a watch having the same. A day display apparatus of a watch includes a first day display wheel having a program tooth portion, a second day display wheel having a claw wheel portion and a gear portion, a jumper configured to perform a jump-and-stop operation with respect to the claw wheel portion, a day intermediate wheel engaging the gear portion, being rotated by the program tooth portion every time when the first day display wheel reaches a predetermined rotational position, and transmitting the rotation to the second day display wheel, and jump-and-stop control means configured to assume a rotation restrained position in which a jump-and-stop claw portion is restrained from coming apart from between the adjacent claw portions of the claw wheel portion when the jumper is at a rotation restrained state and assume a rotation allowing state in which the jump-and-stop claw portion is allowed to climb over the claw portion of the claw wheel portion every time when the first day display wheel reaches the predetermined rotational position and allows the second day display wheel to rotate.