Pivoting Door Handle Prevents Snagging
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Solution Overview
Problem
Conventional push/pull door handle assemblies are prone to snagging clothing and loose items due to limited movement, which can damage these items.
Innovation Solution
The door handle assembly features an actuator plate mounted to a base with a pivotally connected handle that freely pivots between up and down positions, allowing the handle to move freely and preventing snagging by spacing the pivot point from the base, thus only activating the latch in the down position.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Ease of manufacture
If the handle is pivotally connected close to the base with limited movement, then the handle assembly is more stable and easier to manufacture, but clothing and loose articles can become snagged on the handle
Solution Approach 1:
The patent applies the dynamics principle by enabling the handle to pivot freely between an up position and a down position relative to the actuator plate, rather than being constrained to limited movement. This dynamic movement capability allows the handle to release snagged items by moving upward, preventing damage to clothing and articles while maintaining ease of manufacture through the simple pivotal connection design
2Object-affected harmful factors
If the handle is allowed to pivot freely between up and down positions, then snagging of clothing and articles is prevented, but the mechanism becomes more complex
Solution Approach 1:
The patent applies segmentation by separating the handle from the actuator plate through a pivotal connection, allowing independent movement of the handle relative to the actuator plate. This segmentation enables the handle to pivot freely between up and down positions to prevent snagging, while the actuator plate remains separate and can be manufactured independently, actually simplifying the overall device complexity
Solution Approach 2:
The patent uses a pivotal connection as an intermediary mechanism between the handle and the actuator plate. This intermediary allows the handle to move freely for snagging prevention while still transmitting the necessary actuating force to the actuator plate when pushed in the down position, maintaining functionality without excessive complexity
Data Source
AI summary
A door handle assembly for use with a door that includes an actuator plate configured for activating a door latch assembly and a door handle having a working end pivotally connected to the actuator plate and a free end opposite of the working end configured for manipulation by an operator, where the door handle freely pivots between a up position and down position relative to the actuator plate and only activates the latch assembly in the down position.