Flush toilet
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Solution Overview
Problem
Conventional flush toilets require frequent and difficult cleaning due to accumulation of dirty water in the groove between the toilet rim and seat, which compromises the effectiveness of existing prevention methods for preventing water from flowing out.
Innovation Solution
A flush toilet design featuring a projection rib on the rim's front upper face that protrudes outward and is combined smoothly with a flat area via a curved face, along with a downward slope that directs dirty water into the toilet bowl, preventing accumulation and facilitating easy cleaning.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Reliability
If a groove is provided in the side of the lower face of the toilet seat to receive the projection rib, then dirty water is prevented from flowing out, but the groove becomes unclean due to accumulation of dirty water requiring frequent cleaning
Solution Approach 1:
The invention extracts the harmful accumulation space (groove) from the system by eliminating the recessed structure. Instead of providing a groove that traps dirty water, the patent uses a flat front upper face of the rim that prevents water outflow without creating hidden corners where dirt accumulates. This resolves the contradiction by maintaining the prevention function while removing the cleaning difficulty.
Solution Approach 2:
Instead of creating a groove (recessed structure) to prevent water outflow, the invention inverts the approach by using a projection rib (protruding structure) that contacts the flat front upper face of the rim. This inversion eliminates the accumulation problem while maintaining the water prevention function, as the contact surface is flat and accessible rather than recessed and hidden.
2Reliability
If a projection rib is formed on the front upper face of the rim to prevent dirty water outflow, then water prevention is achieved, but the structure becomes complex requiring precise positioning
Solution Approach 1:
The invention segments the water prevention function into two independent elements: a projection rib on the rim and a corresponding flat area on the toilet seat. This segmentation allows each element to be simple in itself while together achieving the prevention function. The projection rib is a simple protrusion and the flat area is a simple surface modification, avoiding complex integrated structures.
Solution Approach 2:
The invention applies local quality by creating a flat area specifically at the front upper face of the rim where it contacts the toilet seat. This localized flat surface, combined with the projection rib, provides the necessary water prevention function without requiring complex structures throughout the entire rim or seat. The modification is minimal and localized to where it is most effective.
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
Effectively prevents dirty water from flowing out between the rim and seat while simplifying the cleaning process, reducing the need for frequent maintenance and ensuring the prevention of water reaching electrical components.
Implementation Method 1
a downward slope that directs dirty water into the toilet bowl
Data Source
Figure 1
Figure 2~3
Figure 4
AI summary
A flush toilet enabling easy cleaning besides capable of preventing dirty water from flowing out is provided. In the flush toilet, a toilet seat (4) is placed on a rim (3) of a toilet body (2) with the toilet seat free to open and close on a pivot axis on a side of a rear end thereof. A projection rib (20) for preventing dirty water from flowing out is formed on a front upper face (3a) of the rim so that it protrudes from an outer periphery of the rim. The projection rib is provided so that it is outside a front periphery of the toilet seat when the toilet seat is in closing state.