Dishwasher Washing Container Frame with Positive-Lock Hinge Fixation
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Solution Overview
Problem
Existing household dishwashers lack a robust and reliable fixation system for their washing containers, which can lead to instability during operation, storage, and transportation, especially under high forces.
Innovation Solution
A U-shaped washing container jacket with a U-shaped frame and hinge plates featuring depth and height positioning sections with beveled surfaces, providing a positive interlocking mechanism for secure fixation in the depth and height directions, while allowing for pivoting of the door, and using thermoriveting for assembly.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a simple support structure is used for the washing container, then the device complexity is reduced, but the stability and reliability under high forces deteriorates
Solution Approach 1:
The fixation system is segmented into multiple independent components: depth positioning sections with first insertion bevels, height positioning sections with second insertion bevels, and corresponding receiving sections with stopping elements. This segmentation allows each component to perform its specific function independently, achieving reliable fixation without excessive overall complexity
Solution Approach 2:
The depth positioning section and height positioning section are nested within the frame structure, with the positioning sections fitting into receiving sections. This nesting approach consolidates multiple fixation functions into a compact integrated structure, improving reliability while controlling complexity
2Strength
If a robust fixation system with positive interlocking is implemented, then the strength and stability improve, but the device complexity increases
Solution Approach 1:
The insertion bevels are designed to automatically guide the depth positioning section and height positioning section into their correct positions within the receiving sections during assembly. The stopping elements self-limit the insertion depth, eliminating the need for additional adjustment mechanisms or complex alignment procedures, thus achieving strong fixation with controlled complexity
Solution Approach 2:
The geometry of the insertion bevels and stopping elements is specifically designed to transform the assembly process into a simple insert-and-lock operation. The bevel angles and stopping element positions are optimized to provide automatic alignment and secure engagement, achieving high fixation strength without increasing system complexity
3Manufacturing precision
If depth positioning sections with insertion bevels are used, then the manufacturing precision is improved, but the ease of manufacture deteriorates
Solution Approach 1:
The insertion bevels automatically perform the positioning function during assembly. When the depth positioning section is inserted into the receiving section, the bevels self-align the components and guide them to the precise final position. The stopping elements self-limit the insertion depth, eliminating the need for separate precision adjustment steps and maintaining ease of manufacture
Solution Approach 2:
The insertion bevels are pre-formed as integral parts of the depth positioning section and receiving section during molding or fabrication. This preliminary formation of the bevel geometry ensures that the precise positioning function is built into the components themselves, eliminating the need for subsequent precision machining or adjustment operations
Data Source
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AI summary
The invention relates to a washing container (2) for a domestic dishwasher (1), with a U-shaped washing container casing (12), a U-shaped frame (16) that is connected to and supports the washing container casing (12), and at least one hinge plate (24) provided on the frame (16), wherein the frame (16) has a receiving section (32) and the at least one hinge plate (24) has a depth positioning section (26) that is received in a form-fitting manner in the receiving section (32) to fix the at least one hinge plate (24) to the frame (16) in a depth direction (y) of the washing container (2).