| 摘要 |
PROBLEM TO BE SOLVED: To improve joint property in a joint part and residence property in a vehicle by inserting a plurality of insertion legs of a headrest to the both of main and auxiliary seat backs and forming the continuous integration of the both. SOLUTION: Joint rods 24 and 25 of the auxiliary seat back 13 are inserted to connection pipes 17 and 18 and, then, the insertion legs 31, 32 and 33 of the headrest 29 are inserted to the connection pipes 15, 16 and 22. Thus, the main seat back 11 is integrated with the auxiliary seat back 13 and continuous integration is formed in the headrest 29 by connecting the both seat backs 11 and 13 as a bridge. The length of the headrest 29 is made to be the one to be arranged over the main and auxiliary seat backs 11 and 13 and it is inserted to the both seat backs in a disposed state over the both so that the both seat backs are joined under rigid continuous integration. Therefore, the occurrence of a deviating phenomenon or the like is eliminated in the boundary part of the both seat backs when a person in a vehicle leans against it, a comfortable seat configuration is obtained, an impact load is distributed and it is advantageous for a load processing.
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