Steering column device
AssigneesJtekt Corporation, Fuji Kiko Co., Ltd.
InventorsTomonori Sugiura, Kentaro Kikuiri, Yuta Kiguchi, Kota Higuchi
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Abstract
A steering column device includes a cylindrical inner tube, and a cylindrical outer tube which is fixed to the inner tube by being externally fitted to slide in an axial direction of the inner tube and being elastically reduced in diameter, wherein the outer tube is configured to have a first slit and a second slit to be reduced in diameter. A stress alleviation portion is provided at the second slit. A contour shape of the stress alleviation portion is set to include an elliptic arc-shaped portion of which a direction of a major axis is a direction intersecting the second slit.
Claims5
A steering column device which rotatably supports a steering shaft, comprising:
- a cylindrical inner tube;
- and
- a cylindrical outer tube which is fixed to the inner tube and configured to slide in an axial direction of the inner tube and be elastically reduced in diameter, wherein
- the outer tube is configured to have
- a first slit which extends in an axial direction of the outer tube and a second slit which is continuous with the first slit and extends in a direction intersecting the first slit,
- a stress alleviation portion provided at a first end portion of the second slit opposite to a second end portion of the second slit at which the first slit is provided, the stress alleviation portion opening from the second slit to have a width longer in the axial direction of the outer tube than a width of the first end portion of the second slit in the axial direction of the outer tube, and
- an opening portion, into which an accessory component is inserted, provided at a distance from the stress alleviation portion in the axial direction of the outer tube, the opening portion being disposed separated from the second slit and overlapping with the second slit in the axial direction of the outer tube,
- a contour shape of the stress alleviation portion is set to include an elliptic arc-shaped portion of which a direction of a major axis is a direction intersecting the second slit, and
- the stress alleviation portion extends toward a side opposite to the opening portion in the axial direction of the outer tube.
Dependencies are inferred from the claim text.