Adjustable Dishwasher Rack Locking Mechanism for Stable Height Shifting
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Solution Overview
Problem
Existing dishwasher dish rack adjustment mechanisms are often complex, difficult to operate, unstable, and unreliable, limiting the flexibility and effectiveness of vertical height adjustments.
Innovation Solution
A dishwasher dish rack height adjustment system featuring first and second height adjustment mechanisms with an adjuster arm, catch, stop, and locking lever, allowing for reliable vertical shifting between raised and lowered positions, utilizing slidably mounted wires and guide interfaces for stable movement.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Adaptability or versatility
If existing adjustment mechanisms are used to enable vertical adjustment of the dish rack, then the flexibility to accommodate different item sizes is improved, but the device complexity increases and reliability decreases
Solution Approach 1:
The adjustment mechanism is divided into separate functional components: a locking lever for releasing the rack, an adjuster arm with catch and stop elements for positioning, and guide interfaces for controlled movement. This segmentation allows each component to perform its specific function efficiently while simplifying the overall structure compared to integrated complex mechanisms.
Solution Approach 2:
The adjuster arm incorporates a catch and stop disposed to engage automatically with the rack at predetermined vertical positions. When the locking lever is released, the rack can be freely positioned and will self-lock at appropriate heights through the engageable catch-stop mechanism, eliminating the need for complex manual adjustment controls or multiple locking points.
2Adaptability or versatility
If existing adjustment mechanisms are used to enable vertical adjustment of the dish rack, then the flexibility to accommodate different item sizes is improved, but the reliability decreases
Solution Approach 1:
The adjuster arm is designed with a catch and stop that engage before the rack reaches extreme positions or under load. This pre-engagement mechanism prevents accidental disengagement or instability during the washing cycle, ensuring the rack remains securely positioned at the selected height throughout operation.
Solution Approach 2:
The adjustment mechanism uses simple, robust components with few moving parts that are easy to manufacture and replace if needed. The locking lever, adjuster arm, and guide interfaces are designed as durable, wear-resistant elements that maintain reliability over many adjustment cycles without requiring complex maintenance or replacement procedures.
3Adaptability or versatility
If existing adjustment mechanisms are used to enable vertical adjustment of the dish rack, then the flexibility to accommodate different item sizes is improved, but the ease of operation decreases
Solution Approach 1:
The locking lever is designed as a separate, easily accessible component that can be independently actuated by the user. By extracting the locking function into a dedicated lever that pivots relative to the rack, the user can release the rack for adjustment without having to manipulate complex control mechanisms or disassemble parts of the structure.
Solution Approach 2:
The locking lever is designed for pivotal movement between engaged and released positions, providing a clear mechanical indication of the rack's locked or unlocked state. This dynamic design allows the user to easily understand the mechanism's status and perform adjustments with simple lever motion rather than requiring precise positioning or force application.
Data Source
AI summary
A dish rack is supported for vertical movement relative to a dishwasher tub between lowered and raised positions. To raise the rack, spring biased locking levers provided on side walls of the dish rack are pivoted to cause wing members of the locking levers to release locking tabs, extending in a cantilevered fashion from locking straps secured to the rack, from locking openings provided in adjuster arms which are fixed vertically relative to the tub, thereby disengaging the locking straps from the adjuster arms to enable the rack to be lifted to the raised position. To lower the rack, the locking levers are again pivoted to reposition support members of the locking straps into positions offset from the adjuster arms, thereby enabling the rack to be guided to the lowered position where the locking tabs automatically engage the adjuster arms.