JPH0177454U

JPH0177454U -

Info

Publication number: JPH0177454U
Application number: JP1987173233U
Authority: JP
Priority date: 1987-11-12
Filing date: 1987-11-12
Publication date: 1989-05-25

Description

[Brief explanation of drawings]

第１図は本考案の第１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図は本考案の第２実施例の
ロツク部が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７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８図はそ
の要部の縦断側面図、第９図は本考案の第３実施
例のロツク部が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１０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１
１図は本考案の第４実施例のロツク部がノツチに
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１２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１３図は本考案の第５実施
例のロツク部が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１４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１
５図はその要部の分解斜視図、第１６図及び第１
７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、５，２
８，４０，４１，５１……上端ボツクス部、６，
３１，３８，４５，５０……プツシユ用ノブ、７
，３０，３７，４３，５７……ロツクプレート、
８……ロツク部、９……ノツチ、１９……リター
ンスプリング。 Fig. 1 is an exploded perspective view showing the first embodiment of the present invention, Fig. 2 is a perspective view showing its overall arrangement, Fig. 3 is a vertical sectional side view of its main parts, and Fig. 4 is a diagram of the lock plate. Fig. 5 is a partially cutaway plan view showing the upper end box part in a state in which the upper end box part engages with the notch of the head rest stay; Fig. 5 is a partially cutaway plan view showing the push operation; A plan view showing a cross section of the upper end box part in a state where the lock part of the second embodiment is engaged with the notch, FIG. 7 is a partially cutaway plan view showing the push operation, and FIG. 8 is a main part thereof. FIG. 9 is a cross-sectional plan view of the upper end box portion of the third embodiment of the present invention in which the lock portion is engaged with the notch, and FIG. 10 is a partial view of the box during push operation. Cutaway plan view, 1st
Fig. 1 is a plan view in section of the upper end box portion of the fourth embodiment of the present invention in which the lock portion is engaged with the notch, and Fig. 12 is a plan view with a portion cut away when the push button is operated. FIG. 13 is a cross-sectional plan view of the upper end box portion of the fifth embodiment of the present invention in which the lock portion is engaged with the notch, and FIG. 14 is a partially cut-away plan view showing the push operation. , 1st
Figure 5 is an exploded perspective view of the main parts, Figure 16 and Figure 1.
FIG. 7 is a plan view of a conventional example. 1...Seat back, 2...Support tube, 3...Head rest, 4...Head rest stay, 5, 2
8, 40, 41, 51... upper end box part, 6,
31, 38, 45, 50...push knob, 7
, 30, 37, 43, 57... lock plate,
8...Lock part, 9...Notch, 19...Return spring.

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 of 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 arranged on one side of the upper end box part to bias the lock plate in the return direction, and a return spring is arranged on the other side of the upper end box part to force the rotation of the lock plate during push and return. A headrest support characterized by a center of motion.