Patent ID: 9199157
Filing Date: 2015-12-01
Classification: A63C,B60G

Abstract:
1. A track structure for a skateboard composed of a support base which is fixed to a deck and a rockable section pivotally attached to the support base and having a track section and provided with a pivotable attachment section which supports the rockable section turnable from a neutral position of the track section to right and left and also biases the rockable section capable of returning to the neutral position, comprising: a bearing containing chamber having a pivotable attachment section composed of a recess which is formed in one of the support base or the rockable section and which is open toward the other; an operation section formed on the other of said support base or the rockable section and rotatably fitted in said bearing containing chamber and composed of a columnar block; a pivot shaft section for rotatably supporting, within the bearing containing chamber, the operation section; and elastic blocks hooked by a plurality of corner sections formed within said bearing containing chamber, capable of replacement, arranged in plural at equal intervals about the axis of the pivot shaft section, wherein a most protruding center of the arc-shape formed on the distal end facing said operation section of each of the elastic blocks is arranged to abut each side wall surface of the operation section at the center at the neutral position of said operation section; the plurality of elastic blocks hold said operation section at the neutral position and, when the operation section pivots to right and left from the neutral position, bias the operation section in a direction in which the operation section returns to the neutral position by deflecting the elastic blocks, capable of repulsion, and wherein said bearing containing chamber is formed of a recess having a substantially square-shaped cross section or a recess having a substantially hexagonal cross section; the operation section has a cross sectional shape of a substantially square, a substantially triangle or a substantially oval shape; the elastic block is formed of a cylindrical body, a columnar body having a substantially ¼ circular section, a substantially fan-shaped cross section or a hog-backed columnar body; and each of the elastic blocks is arranged so that an arc-shaped most protruding portion on a distal end thereof abuts a substantial center of each side wall surface of said operation section and holds said operation section at a neutral position and, when the operation section pivots to right and left, biases the operation section in a direction to return the operation section to the neutral position.