JPS6385141U

JPS6385141U -

Info

Publication number: JPS6385141U
Application number: JP1986181761U
Authority: JP
Priority date: 1986-11-26
Filing date: 1986-11-26
Publication date: 1988-06-03
Anticipated expiration: 2001-11-26
Also published as: JPH054754Y2

Description

[Brief explanation of the drawing]

第１図は本考案に係るヘツドレストの可動構造
の一実施例を示す要部拡大斜視図、第２図はヘツ
ドレストの正面から見た全体の概略構成を示す要
部正面図、第３図はその基本的な動作状態を説明
するための側面説明図、第４図はヘツドレストの
動きを説明するためのシートバツクの側面説明図
、第５図は要部の側面説明図、第６図Ａ，Ｂは第
１および第２の一方向回転伝達部材としてのラチ
エツト機構の説明図である。図中、１……可動ヘツドレスト、３……ヘツド
レストステイ、４……前後スライド機構、５……
上下スライド機構、６……ヘツドレスト本体、７
……パネル、９ａ，９ｂ……第１および第２の一
方向回転伝達部材、１０……駆動軸、１１ａ，１
１ｂ……第１および第２の駆動側歯車、１２ａ，
１２ｂ……第１および第２の連動歯車、１３，１
４……第１および第２のリンク側歯車、１５，１
６……第１および第２のリンク機構、１７，１８
……ロツク機構、１９……電動モータ、２１，２
２：２４，２５……固定側および可動側レール、
２３……基部フレーム、３１，３２……ラチエツ
ト機構。 Fig. 1 is an enlarged perspective view of the main parts showing an embodiment of the movable structure of the headrest according to the present invention, Fig. 2 is a front view of the main parts showing the overall schematic configuration of the headrest as seen from the front, and Fig. 3 is the main parts thereof. Figure 4 is a side view of the seat back to explain the movement of the headrest. Figure 5 is a side view of the main parts. Figures 6A and B are FIG. 3 is an explanatory diagram of a ratchet mechanism as first and second one-way rotation transmission members. In the figure, 1...Movable head rest, 3...Head rest stay, 4...Back and forth slide mechanism, 5...
Vertical slide mechanism, 6...Head rest main body, 7
...Panel, 9a, 9b...First and second unidirectional rotation transmission members, 10...Drive shaft, 11a, 1
1b...first and second drive side gears, 12a,
12b...first and second interlocking gears, 13,1
4...First and second link side gears, 15,1
6...first and second link mechanisms, 17, 18
...Lock mechanism, 19...Electric motor, 21,2
2:24,25...Fixed side and movable side rails,
23...Base frame, 31, 32...Ratchet mechanism.

Claims

[Scope of Claim for Utility Model Registration] (1) A movable headrest structure that supports the headrest stay extending from the upper end of the seat back so as to be movable in the longitudinal and vertical directions of the seat by means of a longitudinal slide mechanism and a vertical slide mechanism. first and second one-way rotation transmission members provided on the drive shaft; first and second one-way rotation transmission members connected to the first and second one-way rotation transmission members;
a drive-side gear, and the first one-way rotation transmission member transmits the driving force to the first gear only when the drive shaft rotates in the forward direction.
The second one-way rotation transmission member transmits the driving force to the second gear only when the drive shaft is reversed.
The first and second drive gears interlock the drive gears, and are connected to the longitudinal slide mechanism and the vertical slide mechanism via the first and second link mechanisms, respectively. first and second link side gears, and the front and rear slide mechanism or the vertical slide mechanism can be selectively adjusted by normal rotation or reverse rotation of the first or second drive side gear. A movable headrest structure featuring: (2) The head rest movable structure according to claim 1, wherein the first link mechanism is connected to a fixed side rail of a front and rear slide mechanism fixed to the head rest stay side. . (3) The second link mechanism is connected to the movable side rail of the vertical slide mechanism fixed to the movable side of the front and rear slide mechanism of the headrest. 2
The movable structure of the headrest described in Section 1. (4) Utility model registration claim 1, characterized in that the first and second one-way rotation transmission members are ratchet mechanisms or freewheel mechanisms.
The movable structure of the headrest according to any one of Items 1, 2 and 3.