| 摘要 |
PROBLEM TO BE SOLVED: To provide a lavatory seat in which a toilet seat upper plate and a toilet seat lower plate can be easily joined.SOLUTION: In a lavatory seat 1, a hollow part 6 for storing a heater 3 is formed between an upper plate 2 and a lower plate 5, and the upper plate 2 and the lower plate 5 are formed by being joined by vibration welding. Each of the upper plate 2 and the lower plate 5 has welding ribs 21, 22, 5a, and 5b to be welded in the vibration welding to weld each other. A seat surface 2a of the upper plate 2 is formed of a soft material, the welding ribs 21 and 22 in the upper plate 2 are formed of a hard material, and the lower plate 5 is formed of a hard material. |
