| 摘要 |
The present invention provides a swing board using directional casters. The swing board according to the present invention comprises: a first frame having a front end rotatably coupled to a stem, a fixed caster being coupled to the rear end of the first frame; a second frame fixed to the stem; a swing frame coupled to the second frame by a horizontal hinge shaft, which is perpendicular to the longitudinal direction of the second frame; and first and second directional casters coupled to the front and rear sides of the swing frame, respectively, with the hinge shaft interposed therebetween, wherein an extension line of a stem shaft extends between a coupling center point (P1) of a portion of the first directional caster, which is coupled to the swing frame, and a grounding center point (P2) of a portion of a wheel of the first directional caster, which contacts the ground. According to the present invention, the stem shaft is positioned closer to the rear side than the coupling center point of the front directional caster such that, even if the user's center of gravity is biased forwards, the danger of overturning forwards can be reduced substantially. Furthermore, the rear directional caster can contact the ground more stably, thereby preventing any decrease in thrust due to lifting of the wheels. |
