| 摘要 |
A work control apparatus in a bicycle exerciser having a driven member rotatively mounted on an exerciser frame, the work control apparatus having a rotatively mounted knob connected to a brake for the driven member for selectively determining the braking pressure exerted on the driven member, the knob being drivingly connected to a rotatively mounted wheel for rotating the wheel an angular distance less than the corresponding angular distance of the knob upon rotation of the knob incident to adjusting the braking pressure. An indicator on the wheel indicates the braking pressure applied by the brake to the driven member at a particular rotatively adjusted position of the knob. The knob and wheel are interconnected to intermittently engage to rotate the wheel in stepped angular increments upon continuous angular movement of the knob. The connection between the knob and wheel is provided by a plurality of angularly spaced drive pins intermittently engaging the wheel in a plurality of angularly spaced notches. In one embodiment, the rod is threadedly attached to and is carried by the brake frame, the knob being fixed to one end of the rod, and the other end of the rod engaging the exerciser frame, the threaded longitudinal adjustment of the rod upon rotation of the knob causing pivotal movement of the brake frame and exerting a predetermined braking pressure between a roller on the brake frame and the driven member.
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