Contact-Minimizing Door Handle with Integrated Locking Mechanism
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Solution Overview
Problem
Public door handles and locks in spaces like public restrooms are high-risk areas for germ and virus transmission, requiring frequent hand washing and uncomfortable contact, as existing door opening and closing systems necessitate multiple contacts with potentially contaminated surfaces.
Innovation Solution
A contact-minimizing door opening and closing system that uses a dual-function handle for both opening and locking, allowing operation without direct hand contact, featuring a handle that can be pushed or pulled by any body part, and includes a mechanism to prevent locking when the room is empty, ensuring security and minimizing surface contact.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Object-affected harmful factors
If a traditional door handle and lock system is used, then the door can be opened and closed, but multiple contacts with the door handle and locking accessories are required, increasing germ transmission risk
Solution Approach 1:
The patent combines the door handle and locking lever into a single integrated component. The handle serves dual functions: it acts as the grip for opening/closing the door and simultaneously functions as the locking lever. This merging eliminates the need for separate locking accessories, reducing the number of contact points and minimizing germ transmission risk while maintaining ease of operation through a single continuous motion.
Solution Approach 2:
The door handle is designed with multi-functionality, serving both as the primary grip for door operation and as the locking mechanism actuator. This universal design allows the same component to perform multiple functions (opening, closing, and locking), thereby reducing the total number of separate parts that require contact and simplifying the overall interaction sequence for the user.
2Reliability
If a key-based locking system is used, then security is provided, but the locking mechanism becomes more complex and requires additional contact points
Solution Approach 1:
The patent extracts and eliminates the key from the locking system entirely. Instead of using a separate key-based locking mechanism, the design relies on the door handle itself as the locking lever. The handle's movement directly actuates the latch or locking mechanism through integrated linkages, removing the need for keys and significantly simplifying the locking mechanism while maintaining security through the same fundamental latch principle.
3Ease of operation
If the door handle is designed for traditional gripping, then it provides familiar operation, but it requires hand contact which increases hygiene risks
Solution Approach 1:
The patent inverts the traditional door handle operation by designing the handle to be pushed rather than pulled or gripped and rotated. This inversion allows users to operate the door and locking mechanism through a pushing motion that can be performed with the palm, forearm, or other body parts, eliminating the need for finger contact with the handle surface while maintaining intuitive and familiar pushing motions that people naturally use for door operation.
Data Source
AI summary
A contact-minimizing door opening and closing system for a door has a handle including a shaft with an endplate disposed on the shaft opposite the handle and a latch bolt including a pin positioned to contact the endplate. The pin prevents movement of the handle when the latch bolt is extended from a lock housing, and allows movement of the handle when the latch bolt is retracted into the lock housing. An engaging and disengaging mechanism couples the handle to a locking pin such that movement of the handle is configured to operate the engaging and disengaging mechanism to lock the door.