Heaven and earth door lock based on the principle of upper and lower linkage double safety locking
A double-insurance, principled technology, applied in building locks, buildings, building structures, etc., can solve the problems of strict installation conditions and installation methods, high cost, complex structure of heaven and earth locks, etc., and achieve simple structure and beautiful appearance , The effect of convenient maintenance and replacement
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[0043] Such as figure 1 As shown, the present invention provides a novel heaven and earth door lock, which is applicable to the installation of doors with indeterminate sill clearances. The present invention includes an upper lock head 1, an intermediate lock 4, a lower lock end 8 and a push rod 5. Same as the prior art, the upper lock head 1, the middle lock 4, and the lower lock head 8 are all arranged on the door and distributed in a straight line from top to bottom, while the push rod 5 is located inside the door.
[0044] The upper lock head 1 is used to fix the top of the door with the upper lock hole of the door frame, and the lower lock head 8 is used to fix the bottom of the door with the lower lock hole of the door frame, so that the door can be closed. And when needing to open the door, then realize by operating intermediate lock 4 or push rod 5. In addition, in order to prevent the door lock from rusting, the upper lock head, the middle lock and the lower lock he...
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