A track structure is provided with a bearing containing chamber having a pivotable attachment section composed of a recess which is formed in one of a support base or a rockable section and is open to the other; an operation section formed on the other of the support base or the rockable section and
A track structure is provided with a bearing containing chamber having a pivotable attachment section composed of a recess which is formed in one of a support base or a rockable section and is open to the other; an operation section formed on the other of the support base or the rockable section and rotatably fitted in the bearing containing chamber; a pivot shaft section for rotatably supporting the operation section within the bearing containing chamber; and elastic blocks arranged in plural within the bearing containing chamber at equal intervals about the axis of the pivot shaft section, the elastic blocks holding the operation section at the neutral position and, when the operation section pivots to right and left, biasing the operation section in a direction in which the operation section returns to the neutral position.
대표청구항▼
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
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; andelastic 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, whereina 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, andwhereinsaid 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; andeach 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. 2. The track structure for a skateboard according to claim 1, wherein the support base is formed of a base section to be fixed to a deck by screwing and a bearing base section juxtaposed with and formed integrally with the base section, and the bearing containing chamber formed of a recess open in the lower face of the bearing base section and a through hole through which a pivot shaft section penetrates in the upper face of the bearing base section at the center the bearing containing chamber. 3. The track structure for a skateboard according to claim 2, wherein the rockable section is composed of a rotation base section pivotally attached to the bearing base section and the track section juxtaposed with and formed integrally with the rotation base section, said rotation base section has an operation section fitted with the bearing containing chamber projected, and a through hole is provided penetrating the rotation base section along a center line of the operation section, aligned with the through hole of the bearing containing chamber and capable of inserting the pivot shaft section between the support base and the rockable section. 4. The track structure for a skateboard according to claim 3, wherein the bearing containing chamber is formed of a recess having a polygonal cross section, and an elastic block is hooked by one or a plurality of corner sections of the bearing containing chamber. 5. The track structure for a skateboard according to claim 3, wherein the elastic block projects to the pivot shaft section side, a distal end thereof abuts the substantial center of a side wall surface of the operation section at a neutral position, and if the operation section turns to right or left, it presses and deflects the elastic block in the rotation direction so that a repulsive force is made to act in a rotation direction opposite to the rotation direction. 6. The track structure for a skateboard according to claim 3, wherein a guide pin having a distal end projecting downward is fixed to the support base, an arc-shaped long hole opened above and fitted with the distal end of said guide pin is formed in the upper face of the rockable section, and said long hole is curved along a rotation trajectory having a length from the pivot shaft to the guide pin as a radius. 7. The track structure for a skateboard according to claim 2, wherein the bearing containing chamber is formed of a recess having a polygonal cross section, and an elastic block is hooked by one or a plurality of corner sections of the bearing containing chamber. 8. The track structure for a skateboard according to claim 2, wherein the elastic block projects to the pivot shaft section side, a distal end thereof abuts the substantial center of a side wall surface of the operation section at a neutral position, and if the operation section turns to right or left, it presses and deflects the elastic block in the rotation direction so that a repulsive force is made to act in a rotation direction opposite to the rotation direction. 9. The track structure for a skateboard according to claim 2, wherein a guide pin having a distal end projecting downward is fixed to the support base, an arc-shaped long hole opened above and fitted with the distal end of said guide pin is formed in the upper face of the rockable section, and said long hole is curved along a rotation trajectory having a length from the pivot shaft to the guide pin as a radius. 10. The track structure for a skateboard according to claim 1, wherein the bearing containing chamber is formed of a recess having a polygonal cross section, and an elastic block is hooked by one or a plurality of corner sections of the bearing containing chamber. 11. The track structure for a skateboard according to claim 10, wherein the elastic block projects to the pivot shaft section side, a distal end thereof abuts the substantial center of a side wall surface of the operation section at a neutral position, and if the operation section turns to right or left, it presses and deflects the elastic block in the rotation direction so that a repulsive force is made to act in a rotation direction opposite to the rotation direction. 12. The track structure for a skateboard according to claim 10, wherein a guide pin having a distal end projecting downward is fixed to the support base, an arc-shaped long hole opened above and fitted with the distal end of said guide pin is formed in the upper face of the rockable section, and said long hole is curved along a rotation trajectory having a length from the pivot shaft to the guide pin as a radius. 13. The track structure for a skateboard according to claim 1, wherein the elastic block projects to the pivot shaft section side, a distal end thereof abuts the substantial center of a side wall surface of the operation section at a neutral position, and if the operation section turns to right or left, it presses and deflects the elastic block in the rotation direction so that a repulsive force is made to act in a rotation direction opposite to the rotation direction. 14. The track structure for a skateboard according to claim 13, wherein a guide pin having a distal end projecting downward is fixed to the support base, an arc-shaped long hole opened above and fitted with the distal end of said guide pin is formed in the upper face of the rockable section, and said long hole is curved along a rotation trajectory having a length from the pivot shaft to the guide pin as a radius. 15. The track structure for a skateboard according to claim 1, wherein a guide pin having a distal end projecting downward is fixed to the support base, an arc-shaped long hole opened above and fitted with the distal end of said guide pin is formed in the upper face of the rockable section, and said long hole is curved along a rotation trajectory having a length from the pivot shaft to the guide pin as a radius.
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이 특허에 인용된 특허 (3)
Kirkland Eric W. ; Bangham Lewis J. ; Hepler Brad D. ; Staples Gregory ; Renteria Theodore L., Adjustable truck assembly for skateboards.
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