| 摘要 |
PURPOSE:To reduce the size and cost of a working mechanism, by installing two on-hook detecting sections to the lock cam of a suspending switch and a unidirectional control cam which operates at the time of off-hook to a hook switch. CONSTITUTION:When a suspending button 11 is depressed, the suspending lever A-1 of a suspending switch A is operated in the direction X and drives the contact spring group A-3 of a frame 6, and then, sends out a suspending sound. At the same time, a lever pin 1 is locked by a lock cam 2. The hook lever B-1 of a hook switch B is always operated in the direction Y by the weight of a transmitter through a hook button 12 and, when the transmitter is lifted up, a contact spring group B-3 is driven and a call becomes possible. To control the lock cam 2 at the time of on-hook, a slope 2-1 for rotating the lever pin 1 under a contacting condition, lock section 2-2, escape groove 2-3, lock releasing groove 2-4, on-hook time detecting section 2-5 by the control pin 4 of the hook switch B, control cam, etc., are provided. |
