PROBLEM TO BE SOLVED: To provide a headrest support structure of a vehicular seat which allows a headrest as a whole to move in a vertical direction, even if the headrest is a type in which it is difficult to arrange a lock mechanism in a headrest main body because a pad part of the headrest is small and the like.SOLUTION: The headrest support structure of a vehicular seat comprises: a rod part 21a extending downward from a headrest main body; a holder 16 that supports the rod part 21a vertically movably and swingably in a longitudinal direction with respect to a back frame 11; a recessed holding part 18c and a locking claw part 18e, arranged below the holder 16, which are locked so that a part of a cross bar part 21d hung across the rod part 21 can be moved vertically and longitudinally with respect to the back frame 11 during normal time and are unlocked so that the cross bar part 21d is moved forward at the time when an impact load is applied thereto; and a movement allowing hole 18b, arranged in front of the recessed holding part 18c, which guides the cross bar part 21d movably in a vertical direction when the cross bar part 21d is moved forward.SELECTED DRAWING: Figure 1

    【課題】ヘッドレストのパッド部が小さい等により、ヘッドレスト本体内にロック機構を配設しづらいタイプのヘッドレストであっても、後突時にヘッドレスト全体を上下方向移動可能とする乗物用シートのヘッドレスト支持構造を提供する。【解決手段】ヘッドレスト本体から下方に延出するロッド部21aと、ロッド部21aをバックフレーム11に対して上下動可能かつ前後方向揺動可能に支持するホルダ16と、ホルダ16の下方に配設されて通常時にロッド部21a間に掛け渡された横棒部21dの一部分をバックフレーム11に対して上下前後移動不能なロック状態とするとともに衝撃荷重印加時にアンロック状態となって横棒部21dを前方に移動させる保持凹部18c及び係止爪部18eと、保持凹部18cの前方に配設されて横棒部21dが前方に移動したときに横棒部21dを上下方向移動可能に案内する移動許容孔18bと、を有する。【選択図】図1


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    Title :

    HEADREST SUPPORT STRUCTURE OF VEHICULAR SEAT


    Additional title:

    乗物用シートのヘッドレスト支持構造


    Contributors:

    Publication date :

    2017-09-28


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet / A47C Stühle , CHAIRS



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