Longyang anti-theft door safety door is a brand on the CCTV list, one of the top ten brands in the country for product quality notarization, the World Expo Excellent Brand Gold Award, the best-selling brand of Shanghai decorative materials anti-theft door products, China Environmental Certification, and one of the top ten brands in Door City. Quality management system certification
Daily maintenance:
1. When the key cannot be fully inserted into the keyhole when opening the door, if it is winter, first check whether there is ice in the keyhole; If it is in other seasons, check whether there is any foreign matter in the keyhole.
2. If you hear the sound of metal friction when opening and closing the door, you can try dripping a little lubricating oil on the hinge of the security door. If it doesn't work, you can find a professional maintenance worker.
3. If the resistance is too high when the anti-theft door is closed, you can also apply a little lubricating oil on the movable lock tongue.
4. When installing anti-theft doors, cement should be filled carefully to effectively and tightly combine the door frame and the wall. This can also maintain a reasonable cooperation between the door body and the door frame and ensure long-term use. Don't worry about deformation.
5. If it is difficult to insert the lock core when opening the door, you can apply a little graphite. Or insert a pencil lead into the lock core.
6. In severe cold areas, the problem of "overwintering" security doors is also very important, because the indoor and outdoor temperature differences in severe cold areas are very large, and when hot and cold water flows, it is easy for the lock core of the security door to get damp, and then To avoid freezing, before winter comes, put an appropriate amount of two drops of antifreeze engine oil in the lock cylinder, and then use gasoline or diesel to clean it after winter. Vegetable oil cannot be used as lubricant for the lock cylinder.
Reference for the above content: Baidu Encyclopedia-Security Door