The window handle lock is not tight or closed tightly, which is usually related to the following links:

1. The locking point is worn or displaced. The lock point is the stress part when the handle is locked. After long-term use, it may be worn or loosened and displaced, resulting in the bolt not being completely embedded in the lock seat. Check whether there are obvious signs of wear at the locking point, and adjust the position of the locking point with an Allen wrench or replace it with a new one.

2. The position of the lock seat (lock block) is offset. If the lock seat on the window frame sinks or deflects due to loose screws, the lock tongue cannot be successfully engaged. Use a screwdriver to loosen the fixing screw of the lock base, and re-lock it after fine adjustment to ensure that the lock tongue is completely engaged with the lock base.

3. The handle itself is not reset in place. Part of the handle is not fully reset to the "locked" position after rotation, resulting in insufficient extension of the lock tongue. Rotate the handle to the 90 ° locking position and then press it slightly to make sure that the lock tongue is completely ejected.

4. Sash sags cause deformation. If the window sash sinks due to loose hinges or long-term use, the overall window frame will be slightly deformed, indirectly affecting the locking effect. At this time, it is necessary to adjust or replace the hinge first, and then adjust the locking point after restoring the normal position of the window sash.

It is recommended to conduct a comprehensive inspection and maintenance of the window handle and lock point system every year, which can effectively extend the service life and ensure the safety of the home.