JPH0266136U

JPH0266136U -

Info

Publication number: JPH0266136U
Application number: JP14622588U
Authority: JP
Priority date: 1988-11-09
Filing date: 1988-11-09
Publication date: 1990-05-18
Anticipated expiration: 2003-11-09
Also published as: JPH0710593Y2

Description

[Brief explanation of drawings]

第１図乃至第５図は本考案の一実施例を示すも
ので、第１図は要部断面図（第２図の―線に
沿う断面図）、第２図は正面図、第３図は分解斜
視図、第４図は第３図中の軸とローラ筒体と回り
止めキーとの拡大斜視図、第５図は同じく軸とロ
ーラ筒体と回り止めキーとの組立状態の断面図、
第６図は従来例を示す車両用シート全体の斜視図
、第７図は同従来のモータ駆動によるヘツドレス
ト高さ調整装置の正面図である。１２……シートバツク、１３……ヘツドレスト
、１４……ステイ、２０……駆動モータ、２１，
２２……回転駆動軸（２１……主軸、２２……副
軸）、２３，２４……ローラ。 Figures 1 to 5 show an embodiment of the present invention, in which Figure 1 is a sectional view of the main part (a sectional view taken along the - line in Figure 2), Figure 2 is a front view, and Figure 3 is a front view. is an exploded perspective view, FIG. 4 is an enlarged perspective view of the shaft, roller cylinder, and anti-rotation key in FIG. 3, and FIG. 5 is a sectional view of the shaft, roller cylinder, and anti-rotation key in an assembled state. ,
FIG. 6 is a perspective view of the entire vehicle seat showing a conventional example, and FIG. 7 is a front view of the conventional motor-driven headrest height adjusting device. 12... Seat back, 13... Head rest, 14... Stay, 20... Drive motor, 21,
22...Rotation drive shaft (21...Main shaft, 22...Subshaft), 23, 24...Roller.

Claims

[Scope of Claim for Utility Model Registration] (1) In a headrest height adjustment device that adjusts the height by moving the headrest at the top of the seat back up and down using a motor drive, the device rotates the headrest in opposite directions using the motor drive while holding the stays of the headrest. A headrest height adjustment device comprising a pair of rollers that move the stay up and down. (2) The headrest height adjusting device according to claim 1, wherein the rollers that clamp the stay are provided so as to rotate idly when an excessive load is applied to the rotary drive shaft of the motor.