| 摘要 |
The toothed wheel gearing has first and second gearwheels installed on respective shafts and operating levers(12,13) installed in the axial direction on both sides of the movable gear pair(6,7) and each formed by a lever unit(15,16) movable parallel to the axial direction. The two lever units have a spring assembly(17) for loading the operating levers in a direction towards each other, and an operating unit(25) operated by the user and with an operating section(26) engaging between the two lever units to act upon one or the other of them. |
