Door Handle Human Body Detection Sensor Servo Engaging Assembly
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Solution Overview
Problem
Conventional door handles require users to press a mechanical switch and rotate the handle simultaneously to open the door from the inside, which complicates the operation and reduces efficiency, especially when trying to prevent unlocking through a peephole.
Innovation Solution
A door handle with a human body detection sensor, a controller, and a servo assembly that controls an engaging assembly with two states, allowing the lock body connecting shaft to rotate only when a human body is detected, eliminating the need for an additional mechanical switch and enhancing safety and efficiency.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a mechanical switch is added to the door handle to prevent unlocking through peephole, then security is improved, but the operation complexity increases and door-opening efficiency decreases
Solution Approach 1:
The patent replaces the mechanical switch system with an automatic sensing system. A human body detection sensor detects the user's approach and automatically controls the engaging assembly via a servo assembly, eliminating the need for manual mechanical switch operation while maintaining security functionality.
Solution Approach 2:
The door handle system performs self-service by automatically detecting human presence and autonomously adjusting the engaging assembly state. The system serves itself by using the sensor data to automatically control the servo assembly, which in turn controls the engaging assembly, removing the need for user intervention in the security mechanism.
2Reliability
If a mechanical switch is added to the door handle to prevent unlocking through peephole, then security is improved, but door-opening efficiency decreases
Solution Approach 1:
The patent replaces the manual mechanical switch operation with an automatic sensing and actuation system. The human body detection sensor and servo assembly work together to automatically control the engaging assembly, eliminating the time-consuming manual switching operation and improving door-opening efficiency while maintaining security.
Solution Approach 2:
The system performs preliminary action by automatically preparing the engaging assembly state in advance based on human body detection. When the user approaches, the sensor detects this and the servo assembly proactively adjusts the engaging assembly before the user needs to open the door, streamlining the door-opening process.
3Productivity
If the engaging assembly is always in the first engaging state to allow door rotation, then door-opening efficiency is improved, but security against peephole unlocking deteriorates
Solution Approach 1:
The patent implements dynamics by making the engaging assembly state changeable based on real-time conditions. The state of the engaging assembly is dynamically adjusted between first and second states based on human body detection, allowing the system to adapt between security and efficiency requirements according to the situation.
Solution Approach 2:
The system uses feedback from the human body detection sensor to automatically control the engaging assembly state. The sensor provides feedback about user presence, which the controller uses to adjust the engaging assembly via the servo assembly, creating a closed-loop control system that balances security and efficiency.
Data Source
AI summary
A door handle includes a human body detection sensor, a controller, a servo assembly, and an engaging assembly. The controller is electrically connected with the human body detection sensor and the servo assembly, and the engaging assembly is controlled by the servo assembly. The engaging assembly includes a first engaging state and a second engaging state. When the engaging assembly is in the first engaging state, the door handle is able to drive a lock body connecting shaft to rotate; and when the engaging assembly is in the second engaging state, the door handle is unable to drive the lock body connecting shaft to rotate.