Dishwasher Door Lock Hook Mechanism for Low Closing Force
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Solution Overview
Problem
Dishwasher door closure mechanisms require high closing forces, which can be inconvenient and pose challenges in design, particularly for cost-sensitive household appliances and child safety considerations.
Innovation Solution
A closure mechanism with a spring-mounted locking hook and approach slope, where the locking hook engages with a trough in the closure element, reducing closing force and incorporating a child safety feature with a locking pin that can be manually released for opening, utilizing a tension spring and compression spring for efficient operation.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a conventional closure mechanism with locking hook and latch is used, then the door can be securely locked, but the closing force required is high
Solution Approach 1:
The approach slope on the locking hook performs preliminary action by gradually guiding the locking element into engagement position before the final locking occurs. This gradual engagement reduces the peak closing force needed compared to immediate engagement, while still achieving secure locking through the subsequent engagement of the locking hook with the locking element.
2Ease of operation
If a simple closure mechanism is used to reduce closing force, then ease of operation improves, but child safety may be compromised
Solution Approach 1:
The closure mechanism is segmented into multiple independent components: the locking hook for primary engagement, the locking pin for securing the carriage position, and the guide element for controlled movement. This segmentation allows the system to provide easy operation through the simple locking hook engagement while maintaining child safety through the additional locking pin that prevents unintended opening.
3Reliability
If a complex closure mechanism with multiple components is used, then functionality and safety improve, but manufacturing cost and assembly complexity increase
Solution Approach 1:
The carriage component serves multiple functions: it carries the locking hook, provides the guide element for controlled movement, and incorporates the locking pin mechanism. This multi-functionality reduces the total number of separate components needed, simplifying assembly while maintaining the required functionality and safety features.
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
The mechanism provides a functionally reliable, cost-effective, and safe closure with reduced closing force, enhanced assembly capabilities, and improved child safety features, suitable for household appliances.
Implementation Method 1
The carriage is loaded by a spring 5 towards the locking position
Implementation Method 2
the locking hook is spring-mounted in the carriage
Data Source
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Figure 2
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AI summary
The invention relates to a lock (1) for a movable closing element (2), especially a door, a cover, a flap, or similar on a domestic appliance such as a dishwasher, a washing machine, a refrigerator, or similar. Said lock comprises a closing hook (6) which can be made to engage with the closing element when being closed and/or be made to disengage therefrom when being opened. The closing hook (6) can be made to engage with a cavity (7) in the closing element (2).