日本东京有一个叫矢田一郎的人，他的儿子是一个残疾儿童，为了儿子的大小便，矢田每天都被弄得疲惫不堪。于是，他花两年时间潜心研究，发明了一种专供残疾人使用的便器。这种便器小巧玲戏，省事省力，很有市场潜力。因此，矢田申请专利之后，就开始自行制作，然后又到各商场? In Tokyo, Japan, there is a man named Iida Ichiro. His son is a disabled child. In order to relieve his son, Yada is exhausted every day. So, he spent two years studying diligently and inventing a toilet for disabled people. This kind of toilet is small and exquisite, saves time and effort, and has great market potential. Therefore, after Yada applied for a patent, he began to make his own production, and then went to the malls.