JPH0177453U

JPH0177453U -

Info

Publication number: JPH0177453U
Application number: JP1987173232U
Authority: JP
Priority date: 1987-11-12
Filing date: 1987-11-12
Publication date: 1989-05-25
Anticipated expiration: 2002-11-12
Also published as: JPH056827Y2

Description

[Brief explanation of the drawing]

第１図は本考案の実施例を示す分解斜視図、第
２図はその全体配置を示す斜視図、第３図はその
要部の縦断側面図、第４図はそのロツクプレート
のロツク部がヘツドレストステーのノツチに係合
する状態の上端ボツクス部を断面して示す平面図
、第５図はそのプツシユ操作時の一部を切欠いて
示す平面図、第６図はその要部の縦断側面図、第
７図及び第８図は従来例の平面図である。１……シートバツク、２……支持筒、３……ヘ
ツドレスト、４……ヘツドレストステー、５……
上端ボツクス部、５ａ……ノブ支持座、６……プ
ツシユ用ノブ、７……ロツクプレート、８……ロ
ツク部、９……ノツチ、１４……ピン挿入孔、１
５……ピン、１５ａ……垂直部、１９……リター
ンスプリング、２８……切欠凹部。 Fig. 1 is an exploded perspective view showing an embodiment of the present invention, Fig. 2 is a perspective view showing its overall arrangement, Fig. 3 is a vertical side view of its main parts, and Fig. 4 shows the lock portion of the lock plate. A cross-sectional plan view of the upper end box portion engaged with the notch of the headrest stay, FIG. 5 is a partially cut-away plan view showing the push operation, and FIG. 6 is a vertical cross-sectional side view of the main part. 7 and 8 are plan views of conventional examples. 1...Seat back, 2...Support cylinder, 3...Headrest, 4...Headrest stay, 5...
Upper end box part, 5a... Knob support seat, 6... Push knob, 7... Lock plate, 8... Lock part, 9... Notch, 14... Pin insertion hole, 1
5...Pin, 15a...Vertical portion, 19...Return spring, 28...Notch recess.

Claims

[Scope of utility model registration request]

A headrest stay hanging vertically from the headrest is inserted into the support cylinder provided at the upper end of the seat bag, and a lock plate equipped with a push knob in the box at the upper end of the support cylinder can be pushed and returned. When the lock plate returns, the lock portion engages with the notch in the headrest stay to lock the headrest at a predetermined height, and when the lock plate is pushed, the engagement is released and the headrest can move up and down. In the head rest support, a return spring is placed on one side inside the upper end box part to bias the lock plate in the return direction.
A pin insertion hole is formed in the other side of the upper end box part so as to face vertically, and a pin that is located on the same side as this pin insertion hole and changes direction vertically after protruding forward is attached to the push knob. The vertical part of the pin is inserted into the pin insertion hole to provide a center of rotation for the lock plate, and a push knob is provided at a portion of the knob support seat of the upper end box portion facing the pin insertion hole. 1. A headrest support, characterized in that a notched recess is formed that allows the pin to pass only at a position deviated from a normal position and allows the vertical portion of the pin to be guided into the pin insertion hole.