| 摘要 |
A ski brake fitted on the heel-retaining unit of a ski binding has two rotatable arms actuated by a battery-powered reversible electric motor which is engaged with an arm-actuating mechanism. A double-throw contactor associated with the actuating mechanism co-operates with a spring-loaded pusher. When the ski boot is inserted in the ski binding, the pusher is moved away from the contactor and the motor produces a pivotal displacement of the arms to their inactive position. When the boot becomes detached from the binding, the pusher spring applies the pusher against the contactor, the motor is started-up and produces a pivotal displacement of the arms to their active braking position.
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