Handle Lock Linkage Plate Mechanism to Prevent Jamming
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Solution Overview
Problem
Existing door locks suffer from jamming issues during locking and unlocking operations due to the design of the locking mechanism, which impedes smooth operation.
Innovation Solution
A handle lock design featuring an inner and outer base with linked handles, an anti-lock driving assembly, and a locking assembly that includes a lock plate and linkage plate, allowing for precise insertion and separation of locking parts into and out of grooves for smooth reverse locking and unlocking.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If the locking mechanism uses a cam surface to squeeze the ball through the ball hole into the locking groove, then the reverse locking function is achieved, but the door lock operation suffers from jamming and does not operate smoothly
Solution Approach 1:
The patent extracts the problematic cam-squeezing mechanism and replaces it with a linkage plate-driven locking part insertion system. The locking part is pushed into the locking groove by the linkage plate's driving backrest, eliminating the cam surface and ball hole assembly that caused jamming while maintaining the reverse locking function.
Solution Approach 2:
Instead of using a cam surface to squeeze a ball into a groove (inward motion), the patent inverts the approach by having the linkage plate push the locking part directly into the locking groove (outward motion). This reversal of the locking mechanism's approach eliminates the jamming issue while achieving the same locking effect.
2Reliability
If the locking assembly uses a square shaft and locking cam mechanism, then the outer handle is locked to the outer panel, but the locking and unlocking operations are not smooth due to the ball squeezing mechanism
Solution Approach 1:
The patent removes the complex square shaft and locking cam mechanism, replacing it with a simpler linkage plate and locking part system. This extraction of the problematic mechanism simplifies the manufacturing process while maintaining the locking function's reliability.
Solution Approach 2:
The locking assembly is segmented into distinct functional components: the linkage plate for driving, the locking part for engagement, and the locking groove for positioning. This segmentation allows each component to be manufactured independently with standard tolerances, improving overall manufacturing precision compared to the integrated cam-sphere mechanism.
Applied Scientific Principles
This section explains which scientific principles are used to turn an abstract innovation direction into a practical engineering solution.
Function Achieved in This Case
Enables smooth and secure reverse locking and unlocking operations by preventing the outer handle from rotating, while allowing easy operation through a sliding mechanism and threaded groove cooperation, thus avoiding jamming.
Implementation Method 1
One end of the rotating member is connected to the linkage plate, and the other end of the rotating member is provided with threaded groove; The anti-lock button is provided with a pin that matches the threaded groove, and the pin drives the rotating member to drive the linkage plate to rotate by compressing the threaded groove
Implementation Method 2
The inner handle and the outer handle are linked through a square shaft
Data Source
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AI summary
A handle lock comprises an inner base and an outer base, and an inner handle and an outer handle are rotationally arranged on the inner base and the outer base respectively. The inner handle is provided with a back locking driving assembly, and the outer handle is provided with a back locking assembly. The counter lock assembly comprises an outer handle head connected to the outer handle, a lock plate and a linkage plate, the outer handle head is rotationally arranged in a rotating groove of the outer base, the lock plate is arranged in the outer handle head in a sliding mode, a locking part is arranged at one end of the lock plate, and a driving backrest is arranged at the other end of the lock plate; a locking groove matched with the locking part is formed in the side wall of the rotating groove, one end of the linkage plate is connected with the back locking driving assembly, and the other end of the linkage plate is arranged in the lock plate in a penetrating mode.