Patent ID: 7457202
Filing Date: 2008-11-25
Classification: G04B

Abstract:
1. A date display mechanism comprising: a date display window for displaying places of units and tens among dates from a 1st day to a 31st day; a units place display plate having toothing and having numerals on a surface thereof corresponding to the places of units of the date, the units place display plate being positioned so that one of the places of units is displayed by the date display window; a tens place display plate having toothing and having numerals on a surface thereof corresponding to the places of tens of the date, the tens place display plate being positioned to that one of the places of tens is displayed by the date display window; a units place wheel for rotationally driving the units place display plate; a tens place wheel for rotationally driving the tens place display plate, the tens place wheel being driven by the units place wheel so that the tens place wheel is unlocked by for one tooth by the units place wheel when the date shifts from a 9th day to a 10th day, from a 19th day to a 20th day and from a 29th day to a 30th day; and a program wheel that performs one revolution in 31 days by being unlocked every day by a predetermined angle by a date indicator driving wheel, the program wheel being programmed so that from a 1st day to a 31st day, the units place wheel is unlocked by for one tooth every day so that the units place wheel performs one revolution in 10 days, and so that when the date shifts from the 31st day to 1st day, the units place wheel is retained to a position of the 31st day and the tens place wheel is unlocked by for one tooth to thereby display the 1st day.