a door lock

Abstract

The invention discloses a door lock, which relates to the technical field of locks and is invented in order to solve the problem that the lock body needs to be replaced at the same time when the door lock is replaced, especially when the replacement lock body is different from the original lock body, and the replacement cost is high. The door lock includes a panel assembly, the panel assembly includes a housing and a handle, a drive disc assembly is arranged in the housing, the drive disc assembly is fixedly connected with the handle, and an adjustment mechanism is also provided in the housing, the adjustment mechanism includes a drive gear, and is connected with the drive disc assembly And rotate together with the drive plate assembly; the back plate is fixed on the housing, and the first strip hole is opened on the back plate along the vertical direction; the sliding part is slidably arranged on the back plate, and the rack is fixedly connected to the sliding part , the rack meshes with the driving gear; the square steel toothed plate includes a fixedly connected driven gear and a protrusion, the driven gear meshes with the rack, the protrusion is set in the first strip hole, and a mounting hole is opened on the protrusion , the mounting hole is used to install the square rod; the fastener is used to fix the relative position of the protrusion and the back plate.

Description

technical field [0001] The invention relates to the technical field of locks, in particular to a door lock. Background technique [0002] A door lock is a device used to lock the door and prevent others from opening the door, and is generally used in homes or public places. [0003] Two key parameters of the door lock, such as figure 1 as shown, figure 1 It is a structural diagram of the lock body installed inside the inner body. L1 is the center distance, which refers to the distance between the center point of the handle and the center point of the keyhole. L2 is the lock edge distance, and the lock edge distance refers to the center of the keyhole The distance from the point to the door edge. [0004] Since the door lock needs to match the center distance of the lock body when installing the door lock, the door lock can be installed normally. Therefore, when the door lock fails, it needs to be replaced together with the lock body. The replacement cost is relatively hig...

AI Technical Summary

Problems solved by technology

[0004] Since the door lock needs to match the center distance of the lock body when installing the door lock, the door lock can be installed normally. Therefore, when the door lock fails, it needs to be replaced together with the lock body. The replacement cost is relatively high, and a new one must be replaced. After the lock body, if the new lock body matched with the new door lock has a larger backseat distance than the old lock body, a new installation hole needs to be reprocessed on the door body, which may cause the new lock body to fail to cover the original installation. hole, which is not conducive to the overall appearance and affects the normal installation of the lock body

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