A telescopic rod structure includes an upper rod and a lower rod. The upper rod includes a first rod body and a second rod body. A diameter of the first rod body is less than a diameter of the second rod body. A rod stepped surface is formed between the first rod body and the second rod body. An outer wall of the second rod body defines a guide groove. The lower rod defines a first through hole and a second through hole. A diameter of the first through hole is less than a diameter of the second through hole. A hole stepped surface is formed between the first through hole and the second through hole. A rib is arranged on the second through hole. The second rod body is sleeved in the second through hole. The first rod body upwards passes through the first through hole.

A telescopic rod structure includes an upper rod and a lower rod. The upper rod includes a first rod body and a second rod body. A diameter of the first rod body is less than a diameter of the second rod body. A rod stepped surface is formed between the first rod body and the second rod body. An outer wall of the second rod body defines a guide groove. The lower rod defines a first through hole and a second through hole. A diameter of the first through hole is less than a diameter of the second through hole. A hole stepped surface is formed between the first through hole and the second through hole. A rib is arranged on the second through hole. The second rod body is sleeved in the second through hole. The first rod body upwards passes through the first through hole.

A locking retainer can include a strap that at least partly bounds an internal area and includes a locking arm with a locking pin that extends into the internal area and a release tab extending opposite the locking arm and away from the internal area. The strap can have a locking configuration in which, with a slidable support within the internal area, the locking pin extends into two locking apertures to lock the slidable support at a fixed length. The locking tab can be moved towards the internal area to move the strap into an unlocking configuration in which the locking pin is removed from the internal area to release the locking pin from the two locking apertures.

A telescoping device including an upper tubular body, a lower tubular body, and a fixing unit that releasably fixes the lower tubular body with respect to the upper tubular body. The fixing unit includes an operation body and a fixation body. The fixation body consists of an outer member, an upper inner member, and a lower inner member. On the outer member, inner peripheral upward inclined surfaces and inner peripheral downward inclined surfaces are formed. On the upper inner member, outer peripheral downward inclined surfaces are formed, and on the lower inner member, outer peripheral upward inclined surfaces are formed.

A locking retainer can be used with a slidable support that includes a two support member with respective sets of locking apertures, with the two support members slidably engaging each other to define a support profile. A strap can at least partly bound an internal area and can support a locking pin that extends into the internal area. The strap can have a locking configuration in which, with the slidable support disposed within the internal area, the locking pin extends into two of the locking apertures to lock the slidable support at a fixed length. A locking retainer can be installed by disposing the slidable support within the internal area, aligning two locking apertures of the slidable support, and applying lateral pressure to a side arm of the locking retainer to seat a locking pin in the aligned locking apertures.

An object storage assembly includes a plurality of bases. A shaft unit is provided and the shaft unit is removably coupled to a selected one of the bases. The shaft unit has a telescopically adjustable length such that the shaft unit has a maximum height ranging between approximately 1.8 meters and 2.1 meters. A plurality of holders is provided and a selected one of the holders is removably coupled to the shaft unit. A plurality of objects is selectively positioned on the selected holder thereby facilitating the objects to be organized and stored.