Abstract: A retaining bracket structure includes a main body and an insertion member. The main body includes a hang portion and a display portion. The display portion includes a plurality of engaging portions. Each engaging portion has a positioning hole therein and a plurality of positioning protrusions on an outer side thereof. The inserting portion includes a plurality of anti-theft engaging rods and fixing rods. Each anti-theft engaging rod is fixed to the positioning hole. Each fixing rod is against a top surface of a corresponding engaging portion of the main body. The positioning protrusions are engaged with an inner wall of a sleeve fitted on the engaging portion of the display portion of the main body, such that the sleeve is firmly positioned on the main body. The anti-theft engaging rod can prevent the sleeve from disengagement and theft, providing a steady connection and a better positioning effect.

Abstract: A sleeve seat, comprising a sleeve connector having a perforated hole and a penetrating piece having multiple penetrating poles and fixing poles; wherein the penetrating pole is used for penetrating into the perforated hole of the sleeve connector and fixed in the hole, and the fixing pole is used for engaging with the top of the sleeve connector. In the light of above, when the sleeve is sheathed onto the sleeve connectors of the main seat, the penetrating poles of the penetrating piece is able to pass through the sleeve and penetrate into the perforated hole to fix still, also the fixing pole is able to pass through the sleeve and engage with the top of the sleeve connector, so that the sleeve can be stably and tightly assembled to the main seat to prevent from the steal, meanwhile, the goals of the stability of assembly and the multiple purposes of use are achieved as well.