| 摘要 |
PURPOSE: An anti-theft structure of a dead bolt for door is provided to prevent the rotation of a knob of a dead bolt from the outside of a door by installing a cover on a main body of the dead bolt. CONSTITUTION: A main body(11) of a dead bolt(10) is installed at the inside of a door(1). A cover(20) is installed at the main body(11). The cover(20) is slid to a left and a right direction of the main body(11). A path(21) is formed in an inner face of the cover(20). The path(21) prevents the contact between a knob(12) and the cover(20) when the knob(12) is in an opened state. A rotary space(22) is formed at an end portion of the path(21). The rotary space(22) is to rotate the knob(12) when the knob(12) is in a closed state.
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