External Double-Locking Lock Mechanism for Easy Door Installation
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Solution Overview
Problem
Existing locks that facilitate double-locking from the outside require complex structures and inconvenient installation processes, particularly when adapting to left- or right-handed doors.
Innovation Solution
A lock design featuring a cylinder, cylinder follower, rotating handle, fixing part, rotating part, stopper, and adapter, allowing for double-locking without the need to rotate the cylinder, with adjustable components for easy installation by non-professionals.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a knob connected with a cylinder is used to realize double-locking from the outside, then double-locking without keys is achieved, but the structure becomes complicated and costly due to the need for a restoration mechanism
Solution Approach 1:
The patent extracts the cylinder from the double-locking mechanism. The rotating handle directly drives the rotating part and adapter, which in turn drive the cylinder follower, completely eliminating the need for the cylinder in the double-locking path. This extraction removes the need for the restoration mechanism while preserving key locking functionality.
Solution Approach 2:
The patent segments the locking functions into independent pathways: key locking through the cylinder, and double-locking through the rotating handle-rotating part-adapter-cylinder follower chain. This segmentation allows each pathway to operate independently without requiring complex interaction mechanisms like restoration mechanisms.
2Reliability
If professionals adjust the lock structure or select specific locks for left-handed or right-handed doors, then proper installation is achieved, but the installation process becomes inconvenient and requires professional intervention
Solution Approach 1:
The patent makes the adapter rotatable relative to the rotating part, allowing the cylinder follower connection to be dynamically adjusted. Users can rotate the adapter to align the cylinder follower's movement direction with the door opening direction, enabling the same lock body to adapt to both left-handed and right-handed doors without professional intervention.
Solution Approach 2:
The rotating adapter provides multi-functionality, allowing a single lock design to serve both left-handed and right-handed doors. The adapter can be rotated to different positions depending on the door type, making the lock universally applicable without requiring different models or professional installation knowledge.
3Ease of operation
If the cylinder is rotated for double-locking, then double-locking is achieved, but the cylinder must be restored to the original position requiring a restoration mechanism
Solution Approach 1:
The patent extracts the cylinder from the double-locking mechanism entirely. The rotating handle drives the rotating part, which pushes the adapter to rotate and drive the cylinder follower directly, eliminating the need for cylinder rotation and the associated restoration mechanism during double-locking operations.
Solution Approach 2:
The adapter acts as an intermediary between the rotating part and the cylinder follower. It translates the rotation of the rotating part into the appropriate motion of the cylinder follower without requiring the cylinder to rotate, thus eliminating the need for restoration mechanisms while enabling double-locking functionality.
Data Source
AI summary
The invention belongs to the technical field of locks, and particularly relates to a lock facilitating double-locking from the outside. The lock comprises a cylinder, a cylinder follower, and a bolt component. The lock further comprises a rotating handle, a fixing part fixedly connected with an external supporting surface, a rotating part fixedly connected with the rotating handle and movably connected with the fixing part, a stopper arranged on the fixing part and movably connected with the rotating part, and an adapter movably connected with the rotating part and connected with the cylinder follower. The structure facilitates double-locking from the outside. A restoration structure for restoring the cylinder is not needed. Therefore, the structure is simple, cost is low, the adapter is easy to mount and dismount, a user can adjust the installation mode of the adapter and the cylinder follower, and even non-professionals can install the lock.