Safety shackle for door

• Main Author: HONGYAO CHEN
• Format: Patent
• Language: English
• Published: 09.06.2004
• Edition: 7
• Subjects: BOLTS OR FASTENING DEVICES FOR WINGS, SPECIALLY FOR DOORS ORWINDOWS; FIXED CONSTRUCTIONS; KEYS; LOCKS; SAFES; WINDOW OR DOOR FITTINGS

The utility model provides a door safety lock catch, comprising a lock catch element, and a fixer. The lock catch element is a flat bar. A plugboard is arranged on one side of the lock catch element, and a slide groove is arranged on the other side of the lock catch element. A serial of fixed ratchets arranged on the lateral side of the slide groove. The fixer comprises a bottom plate, on one end of which a riser is arranged, the width of the bottom plate exactly slides into the slide groove of the lock catch element; a cam hole is arranged on the surface of the movable plate, a pin hole is arranged on one end of the movable plate, and movable ratchets are correspondingly arranged on the other end; a pole is arranged under the button, and passes through the cam hole of the movable plate; the shell is provided with a through hole and a pivot is arranged under the shell, the shell is covered on the bottom plate, the pivotally connects the movable plate on the bottom plate by passing through the pin hole of the movable plate, the button through out from the through hole; a first spring is arranged on the internal face of the shell and on one side of the movable ratchets opposite the movable plate; and a second spring is arranged between the internal face of the shell and the lateral wall of the button, which can fully tighten the door, and can not be opened from outside, ensuring the safety of residence.