Abstract: A connection device has a main block, two pushing blocks and two fasteners. The main block has a trapezoid cross section to form two inclined surfaces, a long side and a short side, two inner threads are formed in the main block and extending to one of the long side and the short side. The pushing blocks are attached respectively to the inclined surfaces, and each pushing block has a body, an inclined surface and two resilient tongues. The resilient tongues are formed on the body, and each resilient tongue has a free end and an engaging protrusion formed on and protruding from the free end of the resilient tongue. The fasteners are inserted into the main block, and each fastener has a thread screwed with one of the inner threads in the main block.

Abstract: A strength saving spiral mop pole has a gripping rod, an outer rod, an inner rod, a rotating module and a holding device. The outer rod is mounted in the gripping rod and has a receiving space and a spiral concave portion. The rotating module has a pressing block and a threaded block. The pressing block has a guiding rod. The threaded block is penetrated by the guiding rod and attached to the pressing block. The threaded block has multiple spiral protrusive parts engaged with the spiral concave portion. To use the spiral mop pole of the present invention, the outer rod is pressed and the threaded block is rotated in the outer rod. The pressing block and the inner rod are driven by the threaded block so that the spinning removal of water is achieved by the rotation.