| 摘要 |
PURPOSE: A key cylinder cover for a fire door lock is provided to improve working convenience without welding and to prevent a cover for protecting a key cylinder from becoming separated vertically. CONSTITUTION: A key cylinder cover for a fire door lock comprises a cylinder bar(10) and a cover(20). The cylinder bar had a hanging projection(11) bent from both sides thereof. The cover comprises a guide groove(22) and a hanger(21). The guide groove is inserted into the hanging projection of the cylinder bar. The cover comprises a reinforcing projection(23) which is projected from both sides in order to prevent the cover from being bent.
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