JPH029154U

JPH029154U -

Info

Publication number: JPH029154U
Application number: JP8743388U
Authority: JP
Priority date: 1988-06-30
Filing date: 1988-06-30
Publication date: 1990-01-22
Also published as: JPH0450844Y2

Description

[Brief explanation of drawings]

第１図は本考案装置の下方から見た断面図、第
２図は本考案装置を備えた座席の斜視図、第３図
はそのフレーム構造の斜視図、第４図は本考案装
置の一部省略した側面図、第５図は同、分解斜視
図、第６図はブレーキ装置の分解斜視図、第７図
は同、内側面図である。図中、３は腰椎支持部材、４はシートバツクフ
レーム、５はブラケツト、６はアーム、８はサブ
アーム、９は圧縮コイルスプリング、１２はカム
、１４はブレーキ装置、１５はその操作軸、１６
は駆動軸、１８は駆動ギヤ、１９は従動ギヤであ
る。 Figure 1 is a sectional view of the device of the present invention seen from below, Figure 2 is a perspective view of a seat equipped with the device of the present invention, Figure 3 is a perspective view of its frame structure, and Figure 4 is a view of the device of the present invention. 5 is an exploded perspective view of the same, FIG. 6 is an exploded perspective view of the brake device, and FIG. 7 is an inner side view of the same. In the figure, 3 is a lumbar support member, 4 is a seatback frame, 5 is a bracket, 6 is an arm, 8 is a sub-arm, 9 is a compression coil spring, 12 is a cam, 14 is a brake device, 15 is its operating shaft, 16
is a drive shaft, 18 is a drive gear, and 19 is a driven gear.

Claims

[Scope of Claim for Utility Model Registration] An arm that is pivotally supported by the seat back frame so as to be rotatable in the front-back direction and supports a lumbar support member at its free end; a sub-arm provided on the seatback frame and rotatably supported in the front-rear direction; and a sub-arm interposed between the sub-arm and the arm so as to urge the lumbar support member forward. a spring that applies a rotational biasing force to the arm; a brake device that is fixed to the seat back frame side and rotates the drive shaft only when a rotation operation is performed from the operating shaft side; and a brake device that is pivotally supported on the seat back frame side. , a disc-shaped cam whose circumferential surface abuts the free end of the sub-arm and is rotatably connected to the drive shaft of the brake device via a gear mechanism, the disc The lumbar support adjustment is characterized in that the support pressure of the lumbar support member is adjusted in a stepless manner by continuously pressing the sub-arm and changing the elasticity of the spring by rotating the shaped cam. Device.