Adjustable Interconnected Lock Offset Spacing Mechanism
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Solution Overview
Problem
Existing interconnected locks require disassembly and the addition or removal of components to adjust latchbolt-deadbolt offset spacings, which can lead to part loss and necessitate tool use, making retrofitting between 4 in. (102 mm) and 5.5 in. (140 mm) spacings cumbersome.
Innovation Solution
An adjustable interconnected lock design featuring a sliding pusher mechanism that extends between latchbolt and deadbolt mechanisms, allowing for offset spacing adjustment without disassembly or component addition/removal, and without requiring tools, by using a hinge-connected arm that can be retracted or extended to change the offset distance.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If a fixed offset spacing system is used, then the lock mechanism is simple and reliable, but it cannot accommodate different door preparations (4 in. and 5.5 in. spacings) without disassembly and component addition/removal
Solution Approach 1:
The pusher mechanism incorporates a movable arm that can be repositioned along the pusher between the latchbolt and deadbolt mechanisms. This dynamic element allows the offset spacing to be adjusted between 4 in. and 5.5 in. configurations without disassembling the lock body or adding/removing components. The arm's position determines the effective spacing, providing adaptability while maintaining a relatively simple overall structure.
2Adaptability or versatility
If an adjustable offset spacing system with disassembly is used, then different spacings can be accommodated, but parts may be lost during adjustment
Solution Approach 1:
The adjustment mechanism is segmented into distinct components (pusher, arm, mounting points) that remain contained within the lock assembly during adjustment. The arm can be repositioned along the pusher without requiring disassembly of the lock body, ensuring that all parts remain accounted for and cannot be lost during the spacing adjustment process.
3Manufacturing precision
If a traditional adjustment system requiring tool use is used, then precise spacing adjustment is possible, but the adjustment process becomes time-consuming and complex
Solution Approach 1:
The arm is designed to be repositionable by the installer without requiring specialized tools. The pusher mechanism allows the arm to be moved to the appropriate position (corresponding to 4 in. or 5.5 in. spacing) through simple manual manipulation, eliminating the need for complex tool-based adjustment procedures while maintaining adequate precision for the application.
Data Source
AI summary
An interconnected lock has adjustable offset spacing between latchbolt and deadbolt lock mechanisms, and a sliding pusher mechanism therebetween. The pusher mechanism is operable upon operation of an interior actuator to bear against the deadbolt lock mechanism and move the deadbolt along the second axis from the latched to the unlatched position at the same time that the operation of the interior actuator moves the latchbolt along the first axis from the latched to the unlatched position. The pusher mechanism includes an arm that bears against the deadbolt lock mechanism and may be retracted and extended between a first length and a second, longer length when changing offset spacing between the deadbolt and latchbolt. The arm is extendable from the first length to the second length without adding or removing any components thereof.