Telescopic support and hair dryer device using the telescopic support
A telescopic support includes a lower step sleeve and an upper step sleeve. The lower step sleeve has an inner sliding guide extending longitudinally in its inner surface and an inner-diameter adapter positioned on its inner surface and at its upper end. The upper step sleeve has an outer sliding guide extending longitudinally in its outer surface and an outer-diameter adapter positioned on its outer surface and at its lower end. The upper step sleeve is slidably received in the lower step sleeve. The inner sliding guide and the outer sliding guide are engageable with each other to enable a linear sliding movement between the lower step sleeve and the upper step sleeve. The inner-diameter adapter and the outer-diameter adapter are lockable with each other in a manner of longitudinal snap fit when the upper step sleeve is extended to its outermost position from the lower step sleeve.
1 . A telescopic support comprising:
a lower step sleeve having an inner sliding guide extending longitudinally in an inner surface of the lower step sleeve and an inner-diameter adapter positioned on the inner surface, and at an upper end, of the lower step sleeve; and
an upper step sleeve having an outer sliding guide extending longitudinally in an outer surface of the upper step sleeve and an outer-diameter adapter positioned on the outer surface, and at a lower end, of the upper step sleeve, wherein
the upper step sleeve is slidably received in the lower step sleeve;
the inner sliding guide of the lower step sleeve and the outer sliding guide of the upper step sleeve are engageable with each other to enable a linear sliding movement between the lower step sleeve and the upper step sleeve;
the inner-diameter adapter of the lower step sleeve and the outer-diameter adapter of the upper step sleeve are lockable with each other in a manner of longitudinal snap fit when the upper step sleeve is extended to its outermost position from the lower step sleeve;
the inner-diameter adapter of the lower step sleeve is an insert bushing in contact with the inner surface of the lower step sleeve, and the outer-diameter adapter of the upper step sleeve comprises two embracing bushing pieces in symmetry disposed on, and in contact with, the outer surface of the upper step sleeve; and
each embracing bushing piece is provided with a positioning protrusion protruding radially inward into a positioning hole provided correspondingly on the outer surface of the upper step sleeve; and the insert bushing is provided with a positioning protrusion protruding radially outward into a positioning hole provided correspondingly on the inner surface of the lower step sleeve.
2 . The telescopic support of claim 1 , wherein the outer sliding guide of the upper step sleeve is a linear runner extending a whole length of the upper step sleeve and the inner sliding guide of the lower step sleeve is a linear rib extending a whole length of the lower step sleeve and slidably received in the linear runner.
3 . The telescopic support of claim 1 , wherein the outer-diameter adapter of the upper step sleeve has an insertion profile, and the inner-diameter adapter of the lower step sleeve has a receiving contour for longitudinally receiving and thus resiliently locking therein the insertion profile of the outer-diameter adapter of the upper step sleeve.
4 . The telescopic support of claim 3 , wherein the inner-diameter adapter of the lower step sleeve and the outer-diameter adapter of the upper step sleeve have a same or similar uniform thickness.
5 . The telescopic support of claim 1 , wherein the upper step sleeve, when acting as an uppermost step sleeve, is further provided with a connector.
6 . A hair dryer device comprising the telescopic support of claim 5 and a hair dryer which is detachably connected to the connector of the uppermost step sleeve of the telescopic support.