Abstract: A motor-driving device comprising: a switching element to control a current passed through a first coil of a stepping motor including the first and a second coils electromagnetically coupled; a rectifier element to be energized in a ground-side-to-second-coil direction; a coil-current-detection unit to detect a current passed through the first coil; a regeneration-current-detection unit to detect a current passed through the rectifier element; a control unit to turn off the switching element when the current passed through the first coil reaches a predetermined-set current based on a detection result of the coil-current-detection unit; and a negative-current-detection unit to detect whether a negative current greater in absolute value than a predetermined-set value is passed through the rectifier element based on a detection result of the regeneration-current-detection unit, the control unit keeping the switching element off when the negative current is not passed, based on a detection result of the negative-

Abstract: A motor-driving device comprising: a switching element to control a current passed through a first coil of a stepping motor including the first and a second coils electromagnetically coupled; a rectifier element to be energized in a ground-side-to-second-coil direction; a coil-current-detection unit to detect a current passed through the first coil; a regeneration-current-detection unit to detect a current passed through the rectifier element; a control unit to turn off the switching element when the current passed through the first coil reaches a predetermined-set current based on a detection result of the coil-current-detection unit; and a negative-current-detection unit to detect whether a negative current greater in absolute value than a predetermined-set value is passed through the rectifier element based on a detection result of the regeneration-current-detection unit, the control unit keeping the switching element off when the negative current is not passed, based on a detection result of the negative-

Abstract: A process for preparing a polyurethane foam handle having a woodgrain finish is disclosed, which comprises injecting a composition comprising a polyol, a polyisocyanate, a crosslinking agent, a catalyst, a foam stabilizer and a blowing agent into a mold having a shape of a handle, blowing and curing the composition and applying a woodgrain finish coating on the formed handle. In this process, a polyol comprising 50 to 100 parts by weight of a polyether polyol having at least two OH groups in the molecule and having a molecular weight of 1,000 to 10,000 and 0 to 50 parts by weight of a polymer polyol having a hydroxyl number of 20 to 50, which is formed by graft-polymerizing a vinyl compound onto a polyether polyol, is used as the polyol, and 10 to 30 parts by weight of a polyol having 2 to 4 OH groups in the molecule and having a hydroxyl number of 800 to 2,000 is used as the crosslinking agent.