Tube guide for a column unit
AssigneeSamhongsa Co., Ltd.
InventorDong Kwan Ma
Life of this patent
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Abstract
The present invention relates to a tube guide for a column unit, and more particularly to a tube guide for a column unit which can smoothly move a spindle upward and downward by forming a plurality of ribs on the inside surface of the tube guide which guides a spindle which has a multilateral cross-section and which can smoothly accomplish the broaching. The tube guide has a hexagonal inside surface. Two inside ribs are formed on each surface along the axial direction. Since the upward and downward movements of the spindle reduce the contacting area, the frictional force is remarkably reduced and the spindle is smoothly moved upward and downward. Further, only one surface of the inside rib needs to be broached, the broaching area is remarkably reduced.
Claims13
A tube guide for a column unit comprising a multilateral inside cross-section so that the inside cross-section of the tube guide can accommodate a guide sleeve having a multilateral corresponding outside cross-section, and which is inserted from an upper end portion of a base tube to a predetermined depth, wherein at least one rib on an inside surface of the tube guide makes contact with an outer surface of the guide sleeve along the axis direction.
A column unit, comprising:
- a hollow base unit:
- a guide tube inserted within the hollow base unit, the guide tube having an inner surface comprising a plurality of vertically extending, adjacent inner wall surfaces;
- a guide sleeve insertable within the guide tube, the guide sleeve having an outer surface with plurality of vertically extending, adjacent outer wall surfaces, the vertically extending, adjacent outer wall surfaces corresponding substantially with the vertically extending, adjacent inner wall surfaces of the guide tube;
- and
- at least one rib extending vertically along at least one of the plurality of vertically extending, adjacent inner wall surfaces of the guide tube.
Dependencies are inferred from the claim text.