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An ageing population is happening; therefore, in the near future we may need to take care of the elderly and people with reduced mobility at home. Furthermore, bathroom is the second most dangerous place indoors, especially the movements of standing and sitting for the elderly in the toilet. They often suffer from falling because of the loss of muscle strength in the hands and legs. At present, there are many toilet products on the market, but the functions are imperfect, for example, the tilted seat cushion is convenient for the user to sit, but with the danger of slipping, etc, as a result this research aims to improve the toilet. First, I collected the relevant references of toilet and TRIZ method, and found out the related problems of toilet, then used the Nine Windows Method analysis, Problem Hierarchy analysis, contradiction matrix, Function Analysis, and Substance-Field Analysis in TRIZ method to find out what could be improved, then made innovative improvements and design of toilet, such as adding a safety ring and backward tilted seat cushion to prevent the risk of slipping due to the forward tilted seat cushion. From this study, I hope my design can make the elderly and people with reduced mobility more safe and convenient to use the toilet, at the same time reduce the burden on themselves and the caregiver.
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