Rotating Display Lock Mechanism for ADA Compliance
Find Innovative SolutionsGenerate Solutions
Solution Overview
Problem
Existing door handles and locks face challenges in meeting ADA requirements for ease of use while providing a sturdy and user-friendly experience, particularly in maintaining quiet operation and displaying lock status effectively.
Innovation Solution
A door handle design featuring an outer section with a display window and an inner section equipped with a push-button lock mechanism, where depressing the button rotates a shaft to change the display from 'VACANT' to 'IN-USE', utilizing a tension spring for resistive force and a channel with diagonal and parallel sections to indicate locked or unlocked status.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If a traditional key lock is used, then security is provided, but it is difficult to operate for users with limited mobility and does not provide visual feedback on lock status
Solution Approach 1:
The patent uses color changes in the display window to indicate lock status. The display shows different colors or visual indicators to communicate whether the door is locked or unlocked, providing immediate visual feedback to users without requiring them to manipulate the mechanism to check status.
Solution Approach 2:
The patent replaces the traditional mechanical key-based locking system with a push-button mechanism that can be easily operated by users with limited mobility. The button actuates a cam mechanism that rotates the locking element, providing an easier alternative to traditional key insertion and turning.
2Ease of operation
If a push-button lock mechanism is added, then ease of operation is improved, but device complexity increases
Solution Approach 1:
The patent combines multiple functions into a single integrated mechanism. The push-button simultaneously actuates the cam rotation and engages/disengages the locking element through the same mechanical pathway. The display mechanism is also integrated into the same rotational movement, so one button press accomplishes both locking and visual indication.
Solution Approach 2:
The cam mechanism serves multiple functions: it translates the linear button press into rotational motion, engages or disengages the locking element with the door strike, and simultaneously rotates the display indicator. This multi-functionality reduces the need for separate mechanisms for each function.
3Ease of operation
If the display window is made visible from the outer side, then user convenience is improved, but privacy concerns may arise when the door is in use
Solution Approach 1:
The patent makes the display window dynamic by rotating it along with the cam mechanism. When the door is locked, the display shows 'LOCKED' or similar indication facing outward. When unlocked, the display can be rotated to face inward or show a different indication, allowing the system to adapt its information display based on the operational state.
Solution Approach 2:
The rotating display provides immediate visual feedback about the lock status to both interior and exterior users. The display can show different information or orient itself differently based on whether the door is locked or unlocked, providing appropriate feedback while managing privacy concerns through its rotational capability.
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
The solution ensures compliance with ADA standards by providing an easily operable and aesthetically pleasing door handle that effectively communicates its lock status, ensuring quiet operation and user convenience.
Implementation Method 1
A tension spring can provide a resistive force to the rotation
Data Source
AI summary
An indicator lock has a rotatable indicator which rotates with the depression of a button on the other side of the lock which is used to simultaneously cause a door to be locked and rotate the indicator. This is accomplished by way of a shaft which rotationally moves with the the locking button. The locking button is pressed inwards and rotates as it is pressed inwards due to a channel which is diagonally disposed relative to the direction the button is pressed. A pin extending out from a shaft of the button is in the diagonal channel and a spring adds tension to push the button and display back to the unlocked configuration. This tension is overcome when the button is pressed and the pin enters into a section of the channel which is parallel to the shaft and direction of button press.