Abstract: A press-fit wrench capable for repetitive operation is disclosed and comprises a driving handle, a ring sleeve member, and an elastic member. A screw or nut is passing through the sleeve hole and the push portion and a wall of the sleeve hole are stopped against a side of the screw or nut to cooperate with the driving handle to repetitively pivot through the arrangement of the driving handle and the ring sleeve member so that the push portion and the wall of the sleeve hole are capable for stopping against the screw or nut with tight engagement and the elastic member is capable for making the ring sleeve member skip to release engagement for smooth and quick operation.

Abstract: A fastening unit includes a body having a driving end and a connection end. The driving end has a driving recess for receiving a nut therein, and the connection end has an engaging recess for being connected with a driving portion of a ratchet wrench. The driving recess has a first slot and a second slot respectively defined in the inside thereof, and the first and second slot extend along the X-axis of the body. An annular groove is defined in the inner periphery of the inner end of the driving recess. A resilient member has a spiral and cylindrical portion. The resilient member has an extension end and a protrusion protrudes laterally from the extension end so that the protrusion applies a resilient force along the Y-axis of the body. The fastening unit firmly position the nut therein.

Abstract: Provided is a folding bicycle comprising two auxiliary rear wheels at both sides of a rear wheel; a seat including a seat tube extended downward; a first crossbar having a front end pivotably connected to a lower portion of a handle above a front wheel, and a rear end fixedly connected to an intermediate portion of the seat tube; a pair of second crossbars having two front ends pivotably connected to an intermediate portion of the handle, and two rear ends fixedly connected to both ends of an hub of the rear wheel. The first crossbar passes an intermediate portion of the second crossbar and is pivotably connected thereto. A flexible shock absorbing means is provided at a joining portion of the seat tube and the second crossbars. The shock absorbing means is adapted to elastically deform when a downward force is exerted on the seat.

Abstract: A folding bicycle comprises a support assembly pivotably connected to a portion of a head tube below a lower enlargement above a front wheel; and a rear wheel assembly comprising a front end pivotably connected to a quick release slidable along the head tube, an intermediate enhancement including a padded cross bar interconnected its right and left portions, an intermediate point pivotably connected to an intermediate point of the support assembly, and two auxiliary wheels fixedly connected to both ends of a hub of a rear wheel as kickstand. Unfastening and sliding the quick release the quick release upward until being stopped by a stop fixedly connected to handlebars, and fastening the quick release will fold the bicycle. Alternatively, unfastening and sliding the quick release downward until being stopped by the enlargement, and fastening the quick release will unfold the bicycle.

Abstract: A folding bicycle comprises a support assembly pivotably connected to a portion of a head tube below a lower enlargement above a front wheel; and a rear wheel assembly comprising a front end pivotably connected to a quick release slidable along the head tube, an intermediate enhancement including a padded cross bar interconnected its right and left portions, an intermediate point pivotably connected to an intermediate point of the support assembly, and two auxiliary wheels fixedly connected to both ends of a hub of a rear wheel as kickstand. Unfastening and sliding the quick release the quick release upward until being stopped by a stop fixedly connected to handlebars, and fastening the quick release will fold the bicycle. Alternatively, unfastening and sliding the quick release downward until being stopped by the enlargement, and fastening the quick release will unfold the bicycle.

Abstract: Provided is a folding bicycle comprising two auxiliary rear wheels at both sides of a rear wheel; a seat including a seat tube extended downward; a first crossbar having a front end pivotably connected to a lower portion of a handle above a front wheel, and a rear end fixedly connected to an intermediate portion of the seat tube; a pair of second crossbars having two front ends pivotably connected to an intermediate portion of the handle, and two rear ends fixedly connected to both ends of an hub of the rear wheel. The first crossbar passes an intermediate portion of the second crossbar and is pivotably connected thereto. A flexible shock absorbing means is provided at a joining portion of the seat tube and the second crossbars. The shock absorbing means is adapted to elastically deform when a downward force is exerted on the seat.

Abstract: A double-reversible screwdriver and wrench combination hand tool constructed to include: a handle, a main body fastened to one end of the handle, the main body comprising a rear coupling end fastened to the handle, a front end terminating in a T-tube formed of a longitudinal tube and a transverse tube, and a receiving chamber on the middle between the rear coupling end and the front end, a longitudinal spindle mounted in the longitudinal tube, the longitudinal spindle having a rear end terminating in a fixed ratchet wheel suspended inside the main body, and a front end terminating in a coupling portion and disposed outside the longitudinal tube, a coupling socket coupled to the coupling portion of the longitudinal spindle to hold a screwdriver bit, enabling the screwdriver bit to be rotated with the longitudinal spindle, a first bevel gear suspended in the receiving chamber inside the main body and rotated with the longitudinal spindle, a transverse spindle mounted in the transverse tube and rotated with the

Abstract: A cup padding for supporting the breast, having a cup-like base made from rubber, the cup-like base having a convex front side wall and a concave rear side wall fitting the breast, the rear side wall having a plurality of cells, and a plurality of air vents respectively extended from the cells to the front side wall for ventilation, the depths of the cells closer to the border area of the rear side wall being relatively smaller than the depths of the cells closer to the center area.