Patent ID: 6574998
Filing Date: 2003-06-10
Classification: E05B,Y10T

Abstract:
A handcuff comprising:a movable arm formed into a â€œCâ€  shape, which is provided at its free end with a ratchet portion formed with dual line of teeth; a pair of fixed arms formed into a â€œCâ€  shape, which are pivotably connected at free ends thereof to the other end of the movable arm by a pivot pin and are integrally provided at their other ends with rectangular base bodies; a partition plate interposed between the pair of base bodies of the fixed arms to define a passageway allowing the movable arm to pass therethrough, and having a central reception cut portion, and which is provided with a dividing protrusion and bilaterally bent protrusions at an inlet of the passageway; a pair of frame plates disposed between the pair of base bodies of the fixed arms and the partition plate, each of the frame plates having a reception cut portion, and which are provided with upwardly inclined surfaces and blocking protrusions at the inlet of the passageway such that a gap is defined between the bilaterally bent protrusions of the partition plate and the upwardly inclined surfaces, thereby guiding a foreign metal piece entered into the passageway to the blocking protrusions through the gap; a pair of pawl pieces biasedly supported in the reception cut portions of the pair of frame plates, and which are provided at their free ends with teeth to be engaged with the teeth of the movable arm; and a leaf spring received in the reception cut portions of the pair of frame plates to bias the pair of pawl pieces toward the ratchet portion of the movable arm.