Adjustable Shaft Door Lock Assembly
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Solution Overview
Problem
Conventional door lock mechanisms have a fixed-length shaft that cannot be adjusted, making them incompatible with door panels of varying thicknesses, limiting their attachment and mounting capabilities.
Innovation Solution
An adjustable shaft mechanism with a housing, orifices, and a spring-biased projection device allows the shaft to be adjusted in length, enabling secure attachment to door panels of different thicknesses by anchoring the shank at selected positions through a channel and orifices within the housing.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed-length shaft is used in the door lock mechanism, then the structure is simple and easy to manufacture, but the shaft cannot be attached to door panels of different thicknesses
Solution Approach 1:
The shaft is transformed from a fixed-length component to an adjustable-length component through the spring-biased projection device that can engage with multiple orifices at different positions, allowing the shaft length to be dynamically changed according to door panel thickness requirements
Solution Approach 2:
The shaft structure is segmented into a shank portion and a projection device portion, with the projection device capable of engaging with multiple discrete orifices along the shaft axis, creating modular adjustment positions that accommodate various door thicknesses
2Adaptability or versatility
If a fixed-length shaft is used, then the manufacturing process is simple, but the door lock assembly cannot be mounted on door panels of varying thicknesses
Solution Approach 1:
Multiple orifices are pre-formed in the shaft at predetermined positions during manufacturing, and a spring-biased projection device is pre-installed to automatically engage with the appropriate orifice based on the door panel thickness, enabling easy adjustment without complex assembly procedures
Solution Approach 2:
The shaft design incorporates variable engagement parameters through multiple orifices positioned at different locations, allowing the effective shaft length to be changed by selecting different engagement points, thus adapting to various door thicknesses while maintaining a standardized manufacturing process
3Adaptability or versatility
If the shaft length is made adjustable, then door panels of different thicknesses can be accommodated, but the shaft mechanism becomes more complex
Solution Approach 1:
The spring-biased projection device automatically engages with the appropriate orifice based on the door panel thickness, eliminating the need for manual adjustment or complex control mechanisms, thus achieving adjustability with minimal added complexity
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 secure and adjustable attachment of the door lock assembly to door panels of various thicknesses, ensuring reliable operation of the dead bolt mechanism across different panel thicknesses.
Implementation Method 1
a spring-biased projection device attached to the shank and including a spring-biased detent for selectively engaging with either of the orifices of the housing
Data Source
AI summary
A door lock assembly includes a lock casing device and a door lock device attached to the opposite sides of a door panel, a core device pivotally mounted to the lock casing device and operatable by an actuation device, an adjustable shaft mechanism includes a housing coupled to the core device and having a number of orifices and a channel communicative with a chamber of the housing, a shank slidably engaged in the housing and having a free end for engaging with the door lock device, and a spring-biased detent attached to the shank for engaging with either of the orifices of the housing and for anchoring the shank to the housing at a selected position and for adjustably mounting the shaft to the door panels of different thicknesses.