Door Lock

A door lock, which is assembled on a door panel, wherein the door panel has a first board surface, a second board surface, a side edge, and an assembly hole that penetrates through the first board surface and the second board surface, wherein the door lock comprises:

• a lock latch, which is assembled on the side edge of the door panel and extends into the assembly hole;
• a first locking mechanism, which is assembled in the assembly hole from the first board surface of the door panel and is properly assembled with the lock latch, and which comprises a first positioning cylinder that passes through the assembly hole, wherein the first positioning cylinder has an external thread portion formed thereon;
• and
• a second locking mechanism, which is assembled in the assembly hole from the second board surface of the door panel and is properly assembled with the lock latch, and which comprises a second positioning cylinder, an outer seal cover, an elastic buckle component, and a rotating lock component, respectively, arranged thereon, wherein the second positioning cylinder is hollow and has an internal thread portion and a ratchet portion formed on an inner edge thereof, respectively, wherein the internal thread portion is capable of being screwed relative to the external thread portion, wherein the outer seal cover is capable of being assembled in the second positioning cylinder, and has an axis hole formed thereof and a positioning groove located at the periphery thereof, wherein the positioning groove corresponds to the ratchet portion, the elastic buckle component is assembled in the positioning groove and engages with the ratchet portion, and the rotating lock component passes through the outer seal cover and is assembled with the lock latch;
• when the second locking mechanism is assembled relative to the first locking mechanism, the second positioning cylinder is screwed relative to the first positioning cylinder, so that the internal thread portion and the external thread portion are relatively screwed and tightened, and during the tightening process, the elastic buckle component contacts the ratchet portion in a clockwise direction, and when the second positioning cylinder rotates counterclockwise relative to the first positioning cylinder, the elastic buckle component resists the ratchet portion in the opposite direction.