Coupler

Claim 1

A coupler for joining two objects, comprising a unitary insertion member adapted to be attached fast to one of said two objects and a reception member adapted to be attached fast to the other object and used for admitting said insertion member into fast engagement therewith, said insertion member being provided with a setting portion for fast attachment to said one object in fixed relation thereto and an integral shaft extended from said setting portion and possessed of a radially expanded engaging portion at the leading and thereof, and said reception member being provided with two generally semicylindrical shells integrally connected to each other freely openably and closably through the medium of a thin-walled integral hinge portion and adapted to form one cylindrical shape upon being closed onto each other along the matched edges thereof and a plurality of like integral resilient engaging pieces regularly spaced in the longitudinal direction on the inner wall of each of the shells, the engaging pieces on one wall being in mirror image with the pieces on the other wall, whereby said reception member is inserted into a fitting hole bored in advance in said other object, with said two shells held in a closed state and consequently said resilient engaging pieces on the inner walls of the shells opposed to each other to enclose therein an engaging hole for admitting said shaft into fast engagement therewith, said engaging hole having a diameter smaller than the outside diameter of the engaging portion to be detachably brought into resilient frictional engagement therewith, at least one opposed pair of engaging pieces being maintained in deformed position by said engaging position of said insertion member.