Cylindrical Lock Indicator Transmission Rod Mechanism
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Solution Overview
Problem
Cylindrical door locks face challenges in providing a reliable lock status indicator on both sides of the door while maintaining durability, especially in high-use scenarios.
Innovation Solution
A lock indicator mechanism with a locking lug transitionable between locked and unlocked positions, featuring a first cuff with a transmission actuator and a second cuff with a transmission receiver, connected by a transmission rod, allowing the lock status to be visually indicated on both sides of the door through a hub system with angled surfaces and resilient restraints.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Loss of information
If a lock indicator mechanism is provided on both sides of the door, then the visibility of lock status is improved, but the device complexity increases
Solution Approach 1:
The lock indicator mechanism is segmented into separate cuffs for each side of the door, with each cuff independently displaying lock status. The transmission rod divides the mechanism into distinct functional sections that can operate independently while maintaining synchronization, reducing overall system complexity.
Solution Approach 2:
A transmission rod acts as an intermediary element connecting the lock input on one side to the indicator cuffs on both sides. This intermediary component simplifies the overall mechanism by providing a direct mechanical linkage rather than requiring complex electronic or multi-component transmission systems.
2Ease of operation
If a transmission mechanism is added to indicate lock status on both sides, then the user convenience is improved, but the device complexity increases
Solution Approach 1:
The lock indicator mechanism is self-service in that it automatically displays lock status on both sides of the door without requiring user intervention. The transmission rod passively transmits motion from the lock input to both cuffs simultaneously, eliminating the need for separate controls or complex electronic systems.
Solution Approach 2:
The transmission rod serves multiple functions: it connects the lock input to both indicator cuffs, transmits rotational motion, and maintains synchronization between both sides. This multi-functionality reduces the need for additional components and simplifies the overall mechanism.
3Reliability
If resilient restraints and angled surfaces are used in the hub system, then the reliability of lock indication is improved, but the manufacturing precision requirements increase
Solution Approach 1:
Resilient restraints are incorporated into the hub system to provide beforehand cushioning for the locking mechanism. These restraints absorb shocks and variations in mechanical input, ensuring reliable indicator activation even when manufacturing tolerances vary. The cushioning effect compensates for minor precision deficiencies.
Solution Approach 2:
The angled surfaces in the hub system are designed with specific geometries that transform rotational motion into linear displacement of the locking lug. By optimizing the angle parameters, the system achieves reliable indicator activation while accommodating reasonable manufacturing tolerances, reducing the stringency of precision requirements.
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 reliable and durable indication of the lock status on both sides of the door, ensuring users can easily determine if the door is locked or unlocked, enhancing user convenience and security.
Implementation Method 1
a transmission rod extending between the first cuff and the second cuff and operable to transmit motion from the first cuff to the second cuff
Implementation Method 2
a hub including a first channel and a second channel, wherein the locking lug includes an engagement portion operable to be positioned in the first channel of the hub when the locking lug is in the locked position and operable to be positioned in the second channel of the hub when the locking lug is in the unlocked position
Data Source
AI summary
Lock indicators useable to signal the locked or unlocked state of a lock at both sides of a door selectively secured by the lock. Lock indicators include a first cuff for receiving an input causing the first cuff to transition from a first position to a second position associated with the locked state and the unlocked state. The lock indicators include a second cuff for receiving input from the first cuff via a transmission rod causing the second cuff to transition from a first position to a second position associated with the locked state and the unlocked state.