| 摘要 |
PURPOSE:To avoid a misfeed of a counter dial and to display the accurate number of record sheets, by locking the counter dial in both forward and reverse directions with a single unit of a sheet bag and permitting the forward revolution of the counter dial after the sheet bag is loaded. CONSTITUTION:When a sheet bag 1 is loaded into a camera main body, a counter pin 17 and a positioning pin 18 are put into a counter hole 10 and a positioning hole 5 respectively. A positioning function part 15c of an elastic member 15 is pressed downward by insertion of the pin 18. Thus a catch 15b for prevention of forward revolution moves toward an arrow 19, and a ratchet 14b has no engagement with the catch 15b. Then the driving force of the pin 17 is transmitted to the dial 14, and therefore the dial 14 can have forward revolutions. In this case, the ratchet 14a and a catch 15a for prevention of reverse revolution engage with each other. Thus the adverse misfeed is prevented for the dial 14. |
