| 摘要 |
PROBLEM TO BE SOLVED: To provide a seat which prevents the loss of parts when put apart and is easy to put together or apart. SOLUTION: The seat comprises a base plate 11, a leg member 12 which can be adjusted to expand and contract and a rear end receiving seat 13. The top surface of the base plate and the lower end of the leg member, and the upper end of the leg member and the under surface of the rear end receiving seat are fit into a tapered concave insertion aperture 22 respectively. The fit portions are connected by a pin 23 and a long aperture 24 and each section is folded as joined together by fitting a projected shaft in a notch 25 of the peripheral wall of the concave insertion aperture.
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