| 摘要 |
PURPOSE: A roller blade is provided, which is prepared in low cost and whose rotary power does not decrease. CONSTITUTION: The roller blade comprises back wheel rotating means comprising a rack gear(28) which is linked to a foot beard to allow it to rise and fall along a supporting board when the weight is loaded, and a pinion gear (30) which is set at the axis of a back wheel and rotates to one direction with being gone with gear with the rack gear (28); and a front wheel rotating means comprising a pumping means (18) which stores air or fluid for pumping the weight, a rotating force generating part (44) which converts the pumping force of air or fluid into the rotating force; a going and coming means which goes and comes according to the pumping capacity of the pumping means (18), a rotating means (24) which contains the power transferring shaft with a main bevel gear (41) to transfer the rotating force to the front wheel, and a subsequent bevel gear (41') which goes with gear with the main bevel gear (41) and is set at the axis of front wheel.
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