(57) A clasp assembly, which can be disconnected or connected with a watch chain quickly,
                     includes a clasp cap, an inner bend plate, outer band plate, a screw, a rivet and
                     an elastic shaft. The inner bend plate comprises an arc plate body and two cylindrical
                     bodies, the two cylindrical bodies disposed on one end of the plate body, a thread
                     hole provided on the surface of a distal end of each cylindrical body, a through hole
                     provided on the other end of the plate body and a convex clasp provided on each side
                     of the plate body. A groove is provided in the middle of the outer bend plate and
                     a through hole is formed on one end of the out bend plate, which comprises two sections
                     spaced by the groove, and linked with the through hole of the inner bend plate by
                     engaging with the rivet pivotally. A through hole is formed on the other end of the
                     outer bend plate which remains integral, and concave clasps are disposed symmetrically
                     on the inner sides of the outer bend plate. The clasp cap is pivotally connected with
                     the thread hole of the inner bend plate by the screw, through holes disposed in two
                     side plates of the clasp cap. A hook clasp and a locking clasp for being connected
                     with the watch chain are mounted on the elastic shaft engaging with the through holes,
                     the locking clasp fitting into the hook clasp. A security cover is pivotally mounted
                     on the rivet connecting the outer bend plate with the watch chain.
                     
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