Abstract: A breakproof handle bar includes continuous wavy tubular concave and convex cambers disposed on an external surface of a middle section of the bar, a flat and smooth circular surface disposed separately on external surfaces of both left and right sides of the bar, and an internal wall with a uniform thickness disposed in a hollow diameter along the interior of the whole bar, so that the bar can sustain a large force and prevent the bar from being broken, cracked, or deformed.

Abstract: The present invention relates to a combined structure of the tubular handle, which is composed of several sections of symmetrically deployed sleeve combing elbow and holding tube; hence, every section of the tube can be optionally collocated with different lengths, angles, materials and colors; in addition, the tube body of said handle will be fortified to become studier and will reach the practical effect on avoiding the handle being deformed and fractured.

Abstract: The invention relates to an armrest structure of the back-seat of the heavy-duty motorcycle; wherein, the structure is composed of a linking-sleeve and a handle set at both sides of the fix-base. One rectangular-and-hollow adjusting trough is respectively set at each side of the arc-shaped fix-base to facilitate bolts to be fixed around the cover of the oil box after penetrating; a penetrating-hole is respectively set at the outmost end of both sides to be slipped through by bolt for bolt's integrating with the bottom of linking-sleeve after slipping through; an open-cutting trough and a bolting-hole being reserved around the on-slipping hole, after the upper end of the linking-sleeve contacting with the on-slipping hole set at one end of the handle, the linking-sleeve and the handle will be integrated as one unit via the bolt's bolting force and the fortifying contact force of the open-cutting trough.