Hands-Free Door Locking via Offset Hinges and Sensors
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Solution Overview
Problem
Existing automated door systems for enclosed area doors in public bathrooms require manual operation to lock and unlock, and there is a need for a hands-free solution that also reduces power consumption and is accessible to disabled patrons, while informing waiting individuals of occupancy status.
Innovation Solution
A hinge mechanism system with offset hinges and a control unit that uses proximity sensors and LED indicators for hands-free operation, combined with a low-power motor and electromagnet for automatic locking, allowing manual override and operation without damaging automated components, and incorporating a foot pull device for easy access.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of operation
If traditional manual locking mechanism is used, then door can be locked securely, but patron must contact the lever and bolt the door manually
Solution Approach 1:
The patent replaces the traditional manual mechanical locking system with an automated electromechanical system. An actuator coupled to a power-assisted drive mechanism automatically positions the bolt in the locked or unlocked state based on sensor input, eliminating the need for manual lever operation while maintaining secure locking functionality.
Solution Approach 2:
The door locking system performs the locking and unlocking operations automatically without requiring user intervention. The control unit monitors sensor signals and autonomously activates the actuator to secure or release the door, allowing the system to serve itself rather than requiring patron contact with manual controls.
2Ease of operation
If automated door opening apparatus is installed on exit/entry door, then hands-free operation is achieved, but the apparatus cannot be adapted for use on a stall-door due to space and weight constraints
Solution Approach 1:
The patent divides the automated door system into separate functional components: a power-assisted drive mechanism for opening/closing operations and a separate actuator for locking/unlocking operations. This segmentation allows the system to be adapted to stall-doors by using only the necessary components, reducing overall weight and space requirements compared to a complete automated door system.
Solution Approach 2:
The patent applies different levels of automation to different parts of the door system. The power-assisted drive mechanism provides automated opening/closing, while the actuator provides automated locking/unlocking. This localized application of automation features allows the system to meet the specific needs of stall-doors without the full complexity of a completely automated door system.
3Loss of information
If traditional locking mechanism is used, then door can be locked, but there is no indication to waiting patrons that the enclosed area is occupied
Solution Approach 1:
The patent incorporates a sensor system that detects the locked state of the door and provides feedback to a control unit. The control unit then activates an indicator (such as an LED or display) to communicate the occupied status to waiting patrons. This feedback loop automatically provides occupancy information without requiring additional manual input or complex communication systems.
4Ease of operation
If automated door system is implemented, then hands-free operation is achieved, but power consumption increases
Solution Approach 1:
The patent uses a sensor system that operates periodically or on-demand rather than continuously. The proximity sensor or camera activates the door opening mechanism only when motion or a specific gesture is detected, rather than requiring continuous power for operation. This periodic activation significantly reduces overall power consumption while maintaining hands-free operation 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
Enables hands-free opening, closing, and locking of enclosed area doors with reduced power consumption, ensuring easy operation for all users, including those with disabilities, and effectively communicates occupancy status to waiting patrons.
Implementation Method 1
a patron waves his or her hand within the detection zone of the proximity sensor, and this movement activates the door to open
Implementation Method 2
The electromagnet is in communication with the controller and is configured to hold the door in the locked position and release the door when energized
Implementation Method 3
A center hinge includes a top leaf, a center pin, and a bottom leaf. The center pin includes an upper pin-portion adapted to slidably insert into a inverted slot on a top socket of the top leaf and an oppositely disposed lower pin-portion adapted to slidably insert into an upright cylindrical slot of the bottom leaf
Implementation Method 4
A gear is disposed intermediate to the upper pin-portion and lower pin-portion. The gear is fixed or otherwise coupled to the pin whereby rotation of the gear results in corresponding rotation of the pin including both the top portion and bottom portion
Implementation Method 5
The lower pin-portion further includes a beveled lower (distal) end. This bevel matches a corresponding bevel in the bottom leaf
Data Source
AI summary
An automated door-opening device is disclosed that includes a first sensor disposed on the outside of the door. The first sensor is adapted to recognize a predetermined pattern of a gesture made by a patron. The gesture made in front of the first sensor opens the door by a first actuator. A second actuator can be used to lock or unlock the door, thereby providing full hand-free operation of the door. A hinge system is disclosed that includes three off-set hinges adapted to utilize the weight of the door to cause the door to self position and allow manual operation of the door.