PROBLEM TO BE SOLVED: To provide a seat back structure of a vehicle seat which adjusts a headrest to a desired height position while inhibiting backlash of the headrest.SOLUTION: A headrest 61 is attached to an upper part of a back frame 21 through a height adjustment mechanism 70 so that a height of the headrest 61 may be adjusted. The height adjustment mechanism 70 includes: a headrest attachment frame part 50 integrally formed with the upper part of the back frame 21 and having a guide rail part 71 which guides the headrest 61 so that the headrest 61 may move in a height direction; and a movable support body 62 which is inserted to fit in the guide rail part 71 so as to move along the guide rail part 71 and supports the headrest 61. A lock mechanism 80 which locks the headrest 61 at a desired height position with the movable support body 62 and releases the lock is disposed between the headrest attachment frame part 50 and the movable support body 62.

    【課題】ヘッドレストのがたつきを抑制しながらヘッドレストを所望とする高さ位置に調整することができる乗物用シートのシートバック構造を提供する。【解決手段】バックフレーム21の上部には、高さ調整機構70を介してヘッドレスト61が高さ調整可能に装着される。高さ調整機構70は、バックフレーム21の上部に一体に形成され、かつヘッドレスト61を高さ方向へ移動可能に案内する案内レール部71を有するヘッドレスト装着フレーム部50と、案内レール部71に沿って移動可能に嵌挿されかつヘッドレスト61を支持する可動支持体62と、を備える。ヘッドレスト装着フレーム部50と、可動支持体62との間には、可動支持体62と共にヘッドレスト61を所望とする高さ位置にロック及びロック解除可能なロック機構80が配設されている。【選択図】図1


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    Title :

    SEAT BACK STRUCTURE OF VEHICLE SEAT


    Additional title:

    乗物用シートのシートバック構造


    Contributors:

    Publication date :

    2015-06-25


    Type of media :

    Patent


    Type of material :

    Electronic Resource


    Language :

    Japanese


    Classification :

    IPC:    B60N SEATS SPECIALLY ADAPTED FOR VEHICLES , Sitze besonders für Fahrzeuge ausgebildet



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