Abstract: A foldable tool retainer capable of updating the tool easily comprises an upper casing sheet; an upper pad; a work tool; a lower pad; a resisting sheet; and a lower casing sheet. When updating the work tool, it is only necessary to press the upper button to drive a buckling end of the upper control sheet to separate from the edge of a rotary shaft of the resisting sheet so that the lower pad can rotate around the ratchet shaft of the lower casing sheet again and the rotary shaft moves out of the notch of the upper pad. Then other components are detached along a sequence of actions reversing to the assembly process.

Abstract: A light emitting buoyage with a magnetic switch comprises a buoyage magnetic switch body connected to the buoyage; a light emitting diode at an upper end of the magnetic switch body; a battery at a lower end of the light emitting diode; a magnetic element at a lower end of the battery; a connecting wire of the magnetic switch body extending from a lower end of the magnetic element; and a switch unit installed in the magnetic switch body at one side of the magnetic element. The battery and the magnetic element are transversally or longitudinally in the magnetic switch body. The magnetic element has a body. The body is installed with at least one retaining magnetic block and at least one movable magnetic block. The body is screwed to a lower end of the magnetic switch body; and the connecting wire is connected to the movable magnetic block.

Abstract: A safety switch comprises a hollow body having an opening and a lower end of the hollow body having three slots; a button pivotally installed upon the opening; a first power terminal installed at one of the three slots; a second power terminal installed at another of the three slots; a load terminal installed at the other slot of the three slots; an elastomer being a U shape metal piece; one end of the elastomer being buckled to an upper end of the load terminal and another end thereof being buckled to the press block of the button; and a metal sheet being installed at a lower side of the button; the metal sheet being made of a compound metal having materials of different expansion coefficients; one end of the metal sheet being connected to the a power terminal; and another end thereof being installed with a conductive silver sheet.