Laundry Porthole Handle Layout for Easier Inside Opening
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Solution Overview
Problem
Laundry machines with pull-to-open door systems have limitations, particularly in ergonomics and ease of operation, as the grip-only handle's position is constrained by the electromechanical lock's location, making it difficult for users to open the door from inside and requiring significant force to open from outside.
Innovation Solution
The electromechanical lock and grip-only handle are positioned differently with respect to the door frame, allowing the handle to be placed in various ergonomic positions relative to the rotation axis, reducing the effort required to open the door and enabling operation from inside, while maintaining chamber tightness.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If the grip-only handle and electromechanical lock are positioned at the same location on the porthole, then the structural design is simplified, but the ergonomic quality deteriorates and the handle cannot be effectively operated from inside the chamber
Solution Approach 1:
The patent divides the porthole assembly into functionally independent components: the electromechanical lock (first member) and the grip-only handle are positioned at different locations on the porthole. This segmentation allows each component to perform its specific function optimally - the lock provides security at its designated position while the handle provides ergonomic access from inside the chamber without interfering with the lock mechanism
Solution Approach 2:
The patent utilizes spatial distribution across different dimensions of the porthole structure. By positioning the handle and lock at different angular positions around the porthole circumference, the design creates independent operational zones that resolve the conflict between structural simplicity and operational versatility
2Ease of operation
If the grip-only handle is positioned far from the electromechanical lock, then ergonomic quality improves and inside operation becomes possible, but the structural coordination becomes more complex
Solution Approach 1:
The patent applies local quality by assigning specific functional characteristics to different regions of the porthole. The handle is positioned in a location optimized for ergonomic gripping and internal operation, while the electromechanical lock is positioned in a location optimized for security function. Each component benefits from its locally optimized position without requiring complex coordination mechanisms
3Reliability
If the porthole requires significant force to open from outside, then the chamber tightness is maintained, but the ease of operation deteriorates
Solution Approach 1:
The grip-only handle acts as an intermediary element that provides mechanical advantage for opening the porthole. Positioned optimally on the porthole structure, it distributes the opening force across a more favorable lever arm, reducing the effort required from the user while still maintaining sufficient force transmission to overcome the gasket seal and open the chamber
Data Source
AI summary
A laundry machine (1) having cabinet (2) housing a chamber (3) for treating laundry having a rotation axis (RR), a porthole (8) for providing access to and tightly closing the chamber (3), a hinge (11) to pivot the porthole (8) to the cabinet (2), an electromechanical lock (12) having a first member (13) on the porthole (8) and a matching member (14) on the cabinet (2), and a grip-only handle (15). The porthole (8) has at least one frame (30, 30a, 31), and a glass (32) secured to the at least one frame (30, 30a, 31). The electromechanical lock (12) is configured to be released by applying a force beyond a threshold onto the porthole (8) away from the cabinet (2). The grip-only handle (15) and the first member (13) of the electromechanical lock (12) may be arranged in such a way that, when the porthole (8) is closed, the center of mass of the grip-only handle (15) and the center of mass of the first member (13) of the electromechanical lock (12) are located, with respect to the rotation axis (RR), at different angular positions. The grip-only handle (15b, 15c) may be configured to be alternatively positionable in one of at least two prefixed positions with respect to the frame assembly.