A dishwasher comprising a rack
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Solution Overview
Problem
In dishwashers, the lower rack often falls when pulled forward rapidly during loading and unloading, causing damage to items, and existing stoppers either prevent full access to the rear or fail to secure the rack properly.
Innovation Solution
A stopper mechanism with a shaft and L-form ends that extends from the rack to the door, allowing the rack to move safely over the door while preventing it from falling, and includes a damping member to reduce noise and deformation, enabling easier access to the rear of the rack.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a stopper is provided to prevent the rack from falling when pulled forward rapidly, then the rack safety is improved, but the user's access to the rear part of the rack becomes limited
Solution Approach 1:
The stopper is designed with a movable shaft that can slide along a channel. When the rack is pulled forward, the shaft moves from its initial position to allow greater rack displacement while still maintaining the stopping function, thus improving user access while preserving rack safety
Solution Approach 2:
The shaft acts as an intermediary element between the stopper and the rack. It provides a sliding connection that allows controlled movement, enabling the rack to move further over the door while the stopper remains engaged, thus resolving the conflict between safety and accessibility
2Reliability
If the rack is stopped on the door by a stopper, then the rack is prevented from leaving the door, but the user's access to the rack is limited
Solution Approach 1:
The stopper mechanism incorporates a movable shaft that slides along a channel when the rack is pulled forward. This dynamic adjustment allows the rack to be positioned further over the door while maintaining secure engagement, improving accessibility without compromising positioning reliability
3Productivity
If the rack moves rapidly over the door during loading and unloading, then the loading efficiency is improved, but the rack may fall and cause damage to items
Solution Approach 1:
The stopper is pre-positioned to engage with the rack before rapid movement occurs. The L-shaped configuration with the shaft extending toward the door creates a preliminary restraint that prevents the rack from falling during rapid loading/unloading operations, thus maintaining both productivity and reliability
Data Source
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AI summary
The present invention relates to a dishwasher (1) comprising a body (2); a washing tub (3) which is disposed in the body (2) and wherein the washing process is performed; at least one rack (4) which is disposed in the washing tub (3) and whereon the kitchen items are placed; at least one spraying member (5) which sprays water onto the rack (4); a door (6) which is provided on the body and which has a closed position (K) where the washing tub (3) is completely isolated from the outside environment and an open position (A) where the user can access the washing tub (3) and the door (6) is parallel to the bottom of the washing tub (3); a pathway (7) which is provided on the door (6) and which enables the rack (4) to move outward from the inside of the washing tub (3) over the door (6) when the door (6) is in the open position (A); and a stopper (8) which extends from the bottom of the rack (4) towards the door (6) while the rack (4) moves outward from the washing tub (3) over the door (6) and which prevents the rack (4) from leaving the door (6).