Patent ID: 8267612

Claim:
A holding structure comprising: a main body comprising a lodging portion formed adjacent to a first end of the main body, and a conical portion extending from the lodging portion, the lodging portion defining at least two transverse receiving holes, the main body defining a stepped through hole extending from the conical portion of the main body to a second end of the main body opposite the first end and communicating with the at least two receiving holes, wherein a portion of the stepped through hole adjacent the conical portion has a first diameter smaller than the diameter of other portions of the stepped through hole; a pressing member received in the stepped through hole of the main body adjacent the first end, the pressing member comprising a conical frustum-shaped pressing portion at an end thereof facing the conical portion; at least two latching members received in the at least two receiving holes and disposed between the pressing portion of the pressing member and the conical portion of the main body; a shaft partially received in the main body and fixed to the pressing member on a side thereof opposite the pressing portion; a resilient member sleeved on the shaft and received in the main body abutting the pressing member; a fastening member fixed to the second end of the main body and abutting the resilient member; and a fixing member partially inserted into the through hole of the main body through the conical portion and fixed to the pressing member adjacent the pressing portion, the fixing member comprising a head portion with a diameter larger than the first diameter positioned outside of the through hole; wherein said holding structure is movable between a first configuration, in which the resilient member biases the pressing portion of the pressing member into the at least two latching members to partially extend the latch members out of the at least two receiving holes, and wherein the head portion of the fixing member is spaced from the conical portion, and a second configuration in which the pressing portion is disengaged from the latching members, and wherein the head portion contacts the conical portion, thereby preventing the pressing member being from locked within the main body.