JPH07194461A - Lumber support adjusting device - Google Patents
Lumber support adjusting deviceInfo
- Publication number
- JPH07194461A JPH07194461A JP35228093A JP35228093A JPH07194461A JP H07194461 A JPH07194461 A JP H07194461A JP 35228093 A JP35228093 A JP 35228093A JP 35228093 A JP35228093 A JP 35228093A JP H07194461 A JPH07194461 A JP H07194461A
- Authority
- JP
- Japan
- Prior art keywords
- shaft portion
- cam
- diameter hole
- rotation center
- swing arm
- Prior art date
- Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
- Granted
Links
Landscapes
- Chair Legs, Seat Parts, And Backrests (AREA)
Abstract
Description
【0001】[0001]
【産業上の利用分野】本発明は、ランバーサポート調節
装置に係るものである。FIELD OF THE INVENTION The present invention relates to a lumbar support adjusting device.
【0002】[0002]
【従来技術】従来公知の、実開平3−29049号公報
には、背凭部の骨格フレームの左右側に設けた調節機構
を有する取付台および取付台と、該取付台および取付台
に左右両端をそれぞれ取付けたスイングアームと、該ス
イングアームの中央に設けたランバープレートとからな
るものにおいて、前記調節機構は、前記取付台に軸装し
一端に操作ハンドルを取付けた左右方向のシャフトと、
該シャフトに固定したギヤと、該ギヤに噛合うセクタギ
ヤと、前記シャフトの回転に制動を与えるブレーキ機構
とにより構成し、前記スイングアームは、前記ランバー
プレートを取付ける中央の水平部と、該水平部の左右側
に形成した長さの相違するアーム部と、該アーム部の一
端を屈曲させた屈曲部と、前記セクタギヤに取付けた軸
部とにより構成したランバーサポート調節装置について
記載されている。2. Description of the Related Art In the publicly known Japanese Utility Model Laid-Open No. 3-29049, a mounting base and a mounting base having an adjusting mechanism provided on the left and right sides of a skeleton frame of a backrest, and both left and right ends of the mounting base and the mounting base are disclosed. And a lumbar plate provided at the center of the swing arm, the adjusting mechanism includes a shaft in the left-right direction that is mounted on the mounting base and has an operation handle attached to one end thereof.
The swing arm comprises a gear fixed to the shaft, a sector gear meshing with the gear, and a brake mechanism for braking the rotation of the shaft. The swing arm includes a central horizontal portion to which the lumbar plate is attached, and the horizontal portion. There is described a lumbar support adjusting device configured by arm portions formed on the left and right sides of the armature having different lengths, a bent portion in which one end of the arm portion is bent, and a shaft portion attached to the sector gear.
【0003】[0003]
【発明が解決しようとする課題】前記公知例は、水平部
に対して屈曲部は取付工程において、使用状態と相違す
る角度への捻り、曲げの変形させて取付けているから、
使用する以前に不要な力が掛って変形し、均等に着座者
の背中を押圧するというランバープレートの作用に悪影
響をおよぼすという課題と、使用状態以外に捻り、曲げ
の変形させるという取付を考慮した強度設計しなければ
ならず、この設計は容易でなく、必要以上の強度を確保
するため線径を太くするので重量が嵩むという課題もあ
る。In the above-mentioned known example, since the bent portion is attached to the horizontal portion by twisting or bending to an angle different from the used state in the attaching process in the attaching step,
Considering the problem that it deforms by applying unnecessary force before using it, which adversely affects the action of the lumbar plate that presses the seated person's back evenly, and the installation that twists and bends other than when in use The strength must be designed, and this design is not easy, and there is also a problem that the weight is increased because the wire diameter is made thick in order to secure more strength than necessary.
【0004】[0004]
【発明の目的】本発明は、スイングアームを変形させな
いで行う取付けについて工夫したものである。SUMMARY OF THE INVENTION The present invention has been devised for mounting without swinging the swing arm.
【0005】[0005]
【課題を解決するための手段】よって、本発明は、背凭
部3の骨格フレーム4の左右側に設けた調節機構21を
有する取付台5および取付台60と、該取付台5および
取付台60に左右両端をそれぞれ取付けたスイングアー
ム50と、該スイングアーム50の中央に設けたランバ
ープレート20とからなるものにおいて、前記調節機構
21は、前記取付台5の外側ブラケット6および内側ブ
ラケット7に軸装し一端に操作ハンドル45を取付けた
左右方向のシャフト22と、該シャフト22に回転のみ
自在に設けたカム体24と、前記シャフト22に固定の
回動アーム26に取付けた前記カム体24の逆転を防止
するラチェット25と、前記カム体24の側面に形成さ
れ前記ラチェット25が係合するラッチ23とにより構
成し、前記スイングアーム50は、前記ランバープレー
ト20を取付ける中央の水平部51と、該水平部51の
左右側に形成したアーム部53と、左右のアーム部53
の上端を同一軸心となるように屈曲させた回動中心軸部
54および回動中心軸部55と、該回動中心軸部54を
屈曲させた前記カム体24に当接するカム当接軸部56
とにより構成し、前記内側ブラケット7には、カム当接
軸部56が左右方向に移動自在に入る大径の下側大径孔
68と該下側大径孔68に連通して前記回動中心軸部5
4に挿通したブッシュ59が嵌合する小径の上側小径孔
69からなる瓢箪型挿入孔67を形成したランバーサポ
ート調節装置、および、前記スイングアーム50のカム
当接軸部56は前記ランバープレート20の軸心方向と
交差するようにすると共に、前記カム体24は前記シャ
フト22の放射方向に形成した溝27の底部にカム溝2
8を形成し、前記外側ブラケット6には上側に膨出して
前記カム体24の外周との間に隙間70を形成する膨出
部10を形成し、前記瓢箪型挿入孔67の下側大径孔6
8および上側小径孔69と前記膨出部10とは、下側大
径孔68は前記隙間70内をカム当接軸部56が左右方
向に移動自在に入り、上側小径孔69は、前記カム当接
軸部56が溝27に位置すると共に回動中心軸部54の
ブッシュ59が嵌合するように構成したランバーサポー
ト調節装置としたものである。Therefore, according to the present invention, the mounting base 5 and the mounting base 60 having the adjusting mechanism 21 provided on the left and right sides of the skeleton frame 4 of the backrest portion 3, and the mounting base 5 and the mounting base. In the swing arm 50 having both left and right ends attached to the swing arm 60 and the lumbar plate 20 provided at the center of the swing arm 50, the adjusting mechanism 21 includes the outer bracket 6 and the inner bracket 7 of the mounting base 5. The shaft 22 in the left-right direction, which is axially mounted and has an operation handle 45 attached to one end, a cam body 24 rotatably provided on the shaft 22, and the cam body 24 attached to a rotating arm 26 fixed to the shaft 22. And a latch 23 formed on a side surface of the cam body 24 and engaged with the ratchet 25. Arm 50, the lumbar and center of the horizontal portion 51 attaching the plate 20, an arm portion 53 formed on the left and right side of the horizontal portion 51, right and left arm portions 53
Of the rotation center shaft portion 54 and the rotation center shaft portion 55 in which the upper end of each of them is bent so as to have the same axis, and a cam contact shaft for contacting the cam body 24 in which the rotation center shaft portion 54 is bent. Part 56
The inner bracket 7 includes a large-diameter lower large-diameter hole 68 into which the cam contact shaft portion 56 is freely movable in the left-right direction and the lower large-diameter hole 68, and the rotation is performed. Central shaft 5
The lumbar support adjustment device having a gourd-shaped insertion hole 67 formed of an upper small diameter hole 69 having a small diameter into which the bush 59 inserted in 4 is fitted, and the cam abutting shaft portion 56 of the swing arm 50 is provided on the lumber plate 20. The cam body 24 intersects with the axial direction, and the cam body 24 is formed at the bottom of a groove 27 formed in the radial direction of the shaft 22.
8 is formed, the outer bracket 6 is formed with a bulging portion 10 that bulges upward to form a gap 70 between the outer bracket 6 and the outer periphery of the cam body 24, and has a large diameter on the lower side of the gourd-shaped insertion hole 67. Hole 6
8 and the upper small diameter hole 69 and the bulging portion 10, the lower large diameter hole 68 allows the cam contacting shaft portion 56 to move freely in the left and right direction within the gap 70, and the upper small diameter hole 69 corresponds to the cam. This is a lumbar support adjusting device in which the contact shaft portion 56 is located in the groove 27 and the bush 59 of the rotation center shaft portion 54 is fitted.
【0006】[0006]
【実施例】本発明の一実施例を図により説明すると、1
は車両用等に使用されるシート、2は座席部、3は背凭
部、4は背凭部3の骨格フレームである。骨格フレーム
4は中空パイプで逆さU型形状に形成され、該フレーム
4の左右のいずれか一側の所望の部分には取付台5を固
定する。該取付台5は、外側ブラケット6および内側ブ
ラケット7より構成する。前記外側ブラケット6は、前
後方向の外側側板8の上下端に内側に突出する上下板部
9、9を一体的に形成し、該上下板部9、9の前後中間
位置には左右方向であって上下にそれぞれ膨出する膨出
部10、10を形成する。前記外側側板8の略中央には
挿入孔13を形成し、挿入孔13の周縁には内側に突き
出るボス14を形成する。前記内側ブラケット7は、前
記外側側板8と平行の内側側板15に前記挿入孔13に
対応する挿入孔16を形成し、挿入孔16の周縁に外側
ブラケット6側に突き出るボス17を形成する。DESCRIPTION OF THE PREFERRED EMBODIMENTS An embodiment of the present invention will be described with reference to the drawings.
Is a seat used for vehicles and the like, 2 is a seat portion, 3 is a backrest portion, and 4 is a skeleton frame of the backrest portion 3. The skeleton frame 4 is formed of a hollow pipe in an inverted U shape, and a mounting base 5 is fixed to a desired portion on either one of the left and right sides of the frame 4. The mount 5 includes an outer bracket 6 and an inner bracket 7. The outer bracket 6 is integrally formed with upper and lower plate portions 9 and 9 projecting inward at upper and lower ends of the outer side plate 8 in the front-rear direction. And bulges 10 and 10 that bulge up and down respectively. An insertion hole 13 is formed substantially in the center of the outer side plate 8, and a boss 14 that protrudes inward is formed at the peripheral edge of the insertion hole 13. The inner bracket 7 is formed with an insertion hole 16 corresponding to the insertion hole 13 in an inner side plate 15 parallel to the outer side plate 8 and a boss 17 protruding toward the outer bracket 6 on the peripheral edge of the insertion hole 16.
【0007】しかして、外側ブラケット6と内側ブラケ
ット7の間には、後述するランバープレート20を前後
に位置調節(押圧力の調節)する調節機構21を設け
る。調節機構21は、左右方向のシャフト22にラッチ
23付のカム体24を回転自在に軸装し、カム体24の
外側には前記ラッチ23に係合するラチェット25付の
回動アーム26を固定して構成している。前記カム体2
4は前記シャフト22の放射方向に溝27を形成し、溝
27の底部にシャフト22の放射方向に厚さを相違させ
てカム溝28を複数段形成する。カム溝28の左右両側
には放射方向に突き出る正円形の鍔29を形成する。鍔
29のそれぞれの側面には係合段部30を有する前記ラ
ッチ23を設ける。前記シャフト22の所定部分には異
径部31を設け、該異径部31には一体的に前記回動ア
ーム26の基部を樹脂成形により形成する。回動アーム
26の先端にはシャフト22と平行の取付嵌合軸32を
形成する。前記ラチェット25は先端は公知のように先
端に至るに従い細く形成するが、基部には前記回動アー
ム26の回動方向に突き出る二跨部33を形成し、二跨
部33の基部には前記取付嵌合軸32が嵌合する嵌合溝
34を形成する。嵌合溝34は前記取付嵌合軸32の直
径より狭く一部を開放した円形に形成し、該開放部分よ
り前記二跨部33を連設し、嵌合溝34を前記取付嵌合
軸32に嵌合させたとき、ラチェット25は取付嵌合軸
32中心に回動するが抜けないように形成する。35は
取付嵌合軸32に設けた大径部、36はラチェット25
をラッチ23の係合段部30に係合するように付勢する
バネである。Therefore, between the outer bracket 6 and the inner bracket 7, there is provided an adjusting mechanism 21 for adjusting the position (adjusting the pressing force) of the lumbar plate 20 which will be described later. The adjusting mechanism 21 rotatably mounts a cam body 24 with a latch 23 on a shaft 22 in the left-right direction, and a rotating arm 26 with a ratchet 25 that engages with the latch 23 is fixed to the outside of the cam body 24. Then configured. The cam body 2
4 has a groove 27 formed in the radial direction of the shaft 22, and a plurality of cam grooves 28 are formed at the bottom of the groove 27 with different thicknesses in the radial direction of the shaft 22. The right and left sides of the cam groove 28 are formed with regular circular flanges 29 protruding in the radial direction. The latch 23 having an engagement step portion 30 is provided on each side surface of the collar 29. A different diameter portion 31 is provided at a predetermined portion of the shaft 22, and the base portion of the rotating arm 26 is integrally formed on the different diameter portion 31 by resin molding. A mounting fitting shaft 32 parallel to the shaft 22 is formed at the tip of the rotating arm 26. Although the tip of the ratchet 25 is formed narrower as it reaches the tip, as is well known, a double straddle 33 protruding in the rotation direction of the rotating arm 26 is formed on the base, and the base of the double straddle 33 has the aforementioned A fitting groove 34 into which the mounting fitting shaft 32 is fitted is formed. The fitting groove 34 is formed in a circular shape that is narrower than the diameter of the attachment fitting shaft 32 and partially opened, and the two straddle portions 33 are continuously provided from the open portion, and the fitting groove 34 is formed into the attachment fitting shaft 32. The ratchet 25 is formed so as to rotate about the mounting fitting shaft 32 but not to be pulled out when the fitting is made. 35 is a large diameter portion provided on the fitting shaft 32, and 36 is a ratchet 25
Is a spring that urges the engagement step portion 30 of the latch 23 to engage.
【0008】前記左右のラッチ23の中心の挿入孔40
の周縁には環状凹部41をそれぞれ形成し、また、前記
回動アーム26のシャフト22の取付部分の外面の周縁
には環状凹部42を形成する。そして、シャフト22に
カム体24を挿通し、シャフト22の内端を内側ブラケ
ット7の挿入孔16に挿通させ、ラッチ23の環状凹部
41に内側ブラケット7のボス17を嵌合させ、この状
態で、外側ブラケット6の挿入孔13をシャフト22に
挿通させ、挿入孔13の周囲のボス14を回動アーム2
6の環状凹部42に嵌合させ、次に、外側ブラケット6
を内側ブラケット7に固定する。43は内側に突き出る
ように切起して形成した突起であり、前記挿入孔13の
周囲に4個形成し、このうち下側の2個の突起43はシ
ャフト22に取付けた前記回動アーム26を前記ラチェ
ット25がラッチ23に係合するように付勢するバネ4
4を係止するもので、残りの突起43は回動アーム26
の回動を規制するストッパーとして作用する。45はシ
ャフト22の外端に設けたハンドル、環状突起46は前
記環状凹部41の周囲に形成した環状突起、環状突起4
7は環状凹部42の周囲に形成した環状突起、48は外
側ブラケット6を内側ブラケット7に固定するネジ48
である。Insertion hole 40 at the center of the left and right latches 23
An annular recess 41 is formed on each of the peripheral edges of the rotary arm 26, and an annular recess 42 is formed on the outer peripheral edge of the mounting portion of the shaft 22 of the rotating arm 26. Then, the cam body 24 is inserted into the shaft 22, the inner end of the shaft 22 is inserted into the insertion hole 16 of the inner bracket 7, and the boss 17 of the inner bracket 7 is fitted into the annular recess 41 of the latch 23. , The insertion hole 13 of the outer bracket 6 is inserted into the shaft 22, and the boss 14 around the insertion hole 13 is attached to the rotating arm 2.
6 into the annular recess 42 and then the outer bracket 6
Is fixed to the inner bracket 7. Reference numeral 43 denotes a protrusion formed by being cut and raised so as to protrude inward, and four protrusions 43 are formed around the insertion hole 13, and the lower two protrusions 43 are the rotating arms 26 attached to the shaft 22. A spring 4 for urging the ratchet 25 to engage the latch 23.
4 is retained, and the remaining projections 43 are attached to the rotary arm 26.
It acts as a stopper that regulates the rotation of the. Reference numeral 45 is a handle provided on the outer end of the shaft 22, annular projection 46 is an annular projection formed around the annular recess 41, annular projection 4
7 is an annular protrusion formed around the annular recess 42, and 48 is a screw 48 for fixing the outer bracket 6 to the inner bracket 7.
Is.
【0009】しかして、前記ランバープレート20は、
トーションバー等により形成したスイングアーム50に
取付ける。スイングアーム50は左右中間部の中央水平
部51に前記ランバープレート20を任意の取付構造に
より取付け、水平部51の左右側は上下に正面視山型形
状の屈曲部52を形成し、左右の屈曲部52に続いて水
平の外側水平部51をそれぞれ形成し、左右の外側水平
部51の端部を屈曲させてアーム部アーム部53をそれ
ぞれ形成し、アーム部53の上端はそれぞれ同一軸心と
なる回動中心軸部54、55に形成し、前記取付台5側
の回動中心軸部54は前方に突き出るように屈曲させて
カム当接軸部56に形成し、カム当接軸部56の中間部
は下方に屈曲させて前記カム体24のカム溝28に係合
する係合部57に形成する。したがって、側方からみる
と、スイングアーム50は、水平部51および屈曲部5
2およびアーム部53と回動中心軸部54、55とは略
同一面に位置し、カム当接軸部56はこれらに対し、略
直角の角度を有するように位置し、水平部51および屈
曲部52およびアーム部53は回動中心軸部54、55
中心に前後方向に回動し、カム当接軸部56の回動方向
は上下方向となる。58はカム当接軸部56と回動中心
軸部54の屈曲部、59は小径部64を有するブッシュ
である。Therefore, the lumbar plate 20 is
It is attached to a swing arm 50 formed by a torsion bar or the like. In the swing arm 50, the lumbar plate 20 is attached to a central horizontal portion 51 at an intermediate portion on the left and right sides by an arbitrary attachment structure, and the left and right sides of the horizontal portion 51 are formed with a bent portion 52 having a chevron shape in a front view at the top and bottom, and bent at the left and right. Horizontal outer horizontal portions 51 are respectively formed following the portions 52, and the end portions of the left and right outer horizontal portions 51 are bent to form arm portion arm portions 53, and the upper ends of the arm portions 53 have the same axis center. Are formed on the rotation center shaft portions 54 and 55, and the rotation center shaft portion 54 on the side of the mounting base 5 is bent so as to protrude forward to form the cam contact shaft portion 56, and the cam contact shaft portion 56. The middle portion of the is bent downward to form an engaging portion 57 that engages with the cam groove 28 of the cam body 24. Therefore, when viewed from the side, the swing arm 50 includes the horizontal portion 51 and the bent portion 5.
2, the arm portion 53 and the rotation center shaft portions 54 and 55 are located on substantially the same plane, the cam contacting shaft portion 56 is located so as to form an angle substantially perpendicular thereto, and the horizontal portion 51 and the bending portion The portion 52 and the arm portion 53 are the rotation center shaft portions 54 and 55.
The cam contacting shaft portion 56 rotates in the front-back direction, and the cam contacting shaft portion 56 rotates in the vertical direction. Reference numeral 58 is a bent portion of the cam contact shaft portion 56 and the rotation center shaft portion 54, and 59 is a bush having a small diameter portion 64.
【0010】しかして、前記取付台5の反対側の骨格フ
レーム4には取付台60を設け、取付台60には一部を
切欠いて通過溝61を形成した取付孔62を形成する。
ブッシュ63は小径部64を有するブッシュである。し
かして、前記内側ブラケット7の内側側板15には、ス
イングアーム50のカム当接軸部56を挿入する瓢箪型
挿入孔67を形成する。瓢箪型挿入孔67は、前記挿入
孔16よりも後側上方位置に形成し、下部の下側大径孔
68と上部の上側小径孔69とを連通させて、瓢箪形状
に形成する。瓢箪型挿入孔67の下側大径孔68および
上側小径孔69は、カム体24(鍔29)の外周と膨出
部10の間に形成した隙間70との関係が、相対的に、
下側大径孔68は前記隙間70内をカム当接軸部56が
左右方向に移動自在に入り、上側小径孔69はカム当接
軸部56が溝27に位置して回動中心軸部54のブッシ
ュ59が嵌合するように構成する。Therefore, the skeleton frame 4 on the opposite side of the mounting base 5 is provided with the mounting base 60, and the mounting base 60 is formed with a mounting hole 62 in which a passage groove 61 is formed by cutting out a part thereof.
The bush 63 is a bush having a small diameter portion 64. The inner side plate 15 of the inner bracket 7 is formed with a gourd-shaped insertion hole 67 into which the cam contacting shaft portion 56 of the swing arm 50 is inserted. The gourd-shaped insertion hole 67 is formed at a position rearward and upward of the insertion hole 16, and connects the lower large diameter hole 68 of the lower part and the upper small diameter hole 69 of the upper part to each other to form a gourd shape. The lower large-diameter hole 68 and the upper small-diameter hole 69 of the gourd-shaped insertion hole 67 have a relative relationship between the outer periphery of the cam body 24 (the collar 29) and the gap 70 formed between the bulging portion 10,
The cam contact shaft portion 56 is movable in the left and right direction in the lower large diameter hole 68 in the gap 70, and the upper small diameter hole 69 is such that the cam contact shaft portion 56 is located in the groove 27 and the rotation center shaft portion. The bush 59 of 54 is configured to fit.
【0011】即ち、スイングアーム50は、回動中心軸
部55側が自由端のとき、カム当接軸部56を瓢箪型挿
入孔67の下側大径孔68より隙間70内に挿入および
左右可能とし、回動中心軸部55を取付台60に回転自
在に取付け、回動中心軸部54を上側小径孔69に移動
させてブッシュ59を嵌合させながらカム当接軸部56
を回動中心軸部54中心に回動させると、係合部57が
溝27に入り込むように構成している。That is, in the swing arm 50, when the side of the rotation center shaft 55 is a free end, the cam contact shaft 56 can be inserted into the gap 70 through the lower large-diameter hole 68 of the gourd-shaped insertion hole 67 and left and right. Then, the rotation center shaft 55 is rotatably attached to the mounting base 60, the rotation center shaft 54 is moved to the upper small diameter hole 69, and the bush 59 is fitted thereinto, while the cam contact shaft 56 is formed.
The engaging portion 57 is configured to enter the groove 27 when the is rotated about the rotation center shaft portion 54.
【0012】[0012]
【作用】本発明は前記の構成であり、シャフト22の異
径部31に回動アーム26を樹脂一体成形により取付
け、回動アーム26の取付嵌合軸32にラチェット25
の嵌合溝34を二跨部33が拡大するように押し込んで
嵌合させ、ラチェット25と回動アーム26の間にバネ
36を取付ける。この場合、ラチェット25は取付嵌合
軸32中心に回動するのみでり、二跨部33、二跨部3
3の基部は前記取付嵌合軸32の直径より狭く形成して
あるから、一旦ラチェット25の嵌合溝34を取付嵌合
軸32に嵌合させると、回動方向と抜ける方向は相違す
るので外れず、取付工程を頗る容易にしている。また、
ラチェット25の表裏を反対にするだけで、左右いずれ
の調節機構21に両用できる。The present invention has the above-described structure. The rotating arm 26 is attached to the different diameter portion 31 of the shaft 22 by resin integral molding, and the ratchet 25 is attached to the attachment fitting shaft 32 of the rotating arm 26.
The fitting groove 34 is pushed into the fitting groove 34 so that the two straddle portion 33 expands, and the fitting groove 34 is fitted, and the spring 36 is attached between the ratchet 25 and the rotating arm 26. In this case, the ratchet 25 only rotates about the mounting fitting shaft 32, and the ratchet 25 and the straddle 3
Since the base portion of 3 is formed to be narrower than the diameter of the mounting fitting shaft 32, once the fitting groove 34 of the ratchet 25 is fitted into the mounting fitting shaft 32, the rotating direction is different from the pulling direction. It does not come off, making the installation process extremely easy. Also,
By simply reversing the front and back of the ratchet 25, it can be used for both the left and right adjusting mechanisms 21.
【0013】しかして、調節機構21の取付工程の一例
を示すと、シャフト22にバネ44を挿通し、この状態
のシャフト22を、バネ44の両端を下側の突起43に
係止するようにして、外側ブラケット6の挿入孔13に
挿通し、次に、シャフト22にカム体24を挿通させ、
シャフト22の内端を内側ブラケット7の挿入孔16に
挿通し、この状態で、外側ブラケット6を内側ブラケッ
ト7にネジ48により固定し、調節機構21を外側ブラ
ケット6および内側ブラケット7に取付ける。As an example of the mounting process of the adjusting mechanism 21, the spring 44 is inserted through the shaft 22, and the shaft 22 in this state is locked at both ends of the spring 44 by the lower protrusions 43. Through the insertion hole 13 of the outer bracket 6 and then the cam body 24 through the shaft 22.
The inner end of the shaft 22 is inserted into the insertion hole 16 of the inner bracket 7, and in this state, the outer bracket 6 is fixed to the inner bracket 7 with a screw 48, and the adjusting mechanism 21 is attached to the outer bracket 6 and the inner bracket 7.
【0014】この場合、シャフト22を挿通する外側ブ
ラケット6の挿入孔13および内側ブラケット7の挿入
孔16の周縁にはボス14およびボス17が形成され、
回動アーム26の外面およびラッチ23には環状凹部4
1、環状凹部42を形成しているから、環状凹部41、
環状凹部42にボス14、ボス17が嵌合してシャフト
22に軸装され、従来のようにブッシュを必要とせず、
部品と取付工程を簡略にしている。また、環状凹部41
および環状凹部42の周縁には環状突起46および環状
突起47をそれぞれ形成しているから、回動アーム26
の内面にはカム体24の側面に設けたラッチ23に形成
した環状突起46が摺接し、回動アーム26の外面は環
状突起47が外側側板8の内面に摺接し、カム体24の
内側の側面に形成したラッチ23の環状突起46が内側
ブラケット7の内側側板15の内面に摺接し、摺接面は
線接触であるので、抵抗なく各部品は作用する。また、
環状突起46および環状突起47が各面に当接すること
により、外側ブラケット6と回動アーム26とカム体2
4と内側ブラケット7とは所定の位置に組付られるの
で、取付作業も容易となる。In this case, bosses 14 and 17 are formed on the periphery of the insertion hole 13 of the outer bracket 6 and the insertion hole 16 of the inner bracket 7 through which the shaft 22 is inserted.
The annular recess 4 is formed on the outer surface of the rotating arm 26 and the latch 23.
1. Since the annular recess 42 is formed, the annular recess 41,
The boss 14 and the boss 17 are fitted in the annular recess 42 and mounted on the shaft 22 without the need for a bush as in the conventional case.
The parts and installation process are simplified. In addition, the annular recess 41
Since the annular projection 46 and the annular projection 47 are formed on the periphery of the annular recess 42, respectively, the rotating arm 26
The annular projection 46 formed on the latch 23 provided on the side surface of the cam body 24 slides on the inner surface of the cam body 24, and the annular projection 47 slides on the inner surface of the outer side plate 8 on the outer surface of the rotating arm 26. Since the annular projection 46 of the latch 23 formed on the side surface is in sliding contact with the inner surface of the inner side plate 15 of the inner bracket 7, and the sliding contact surface is a line contact, each component operates without resistance. Also,
The outer bracket 6, the rotating arm 26, and the cam body 2 are brought into contact with each other by the annular projection 46 and the annular projection 47.
Since the 4 and the inner bracket 7 are assembled at a predetermined position, the mounting work becomes easy.
【0015】しかして、スイングアーム50は、前記内
側ブラケット7には、カム当接軸部56が左右方向に移
動自在に入る大径の下側大径孔68と該下側大径孔68
に連通して前記回動中心軸部54に挿通したブッシュ5
9が嵌合する小径の上側小径孔69からなる瓢箪型挿入
孔67を形成しているから、回動中心軸部55を取付台
60に取付ける前に、カム当接軸部56の軸心方向がシ
ャフト22の軸心方向と平行となるようにし(図9の
イ、図10、図11)、次に、カム当接軸部56の先端
を瓢箪型挿入孔67の下側大径孔68に挿入し、カム当
接軸部56の中間部まで下側大径孔68に挿入する(図
12、図13)。この状態で、カム当接軸部56の先端
を外側ブラケット6の膨出部10の内側に向くように差
し込み(図9のロ、図14、図15)、この状態で、カ
ム当接軸部56と回動中心軸部54との屈曲部58が下
側大径孔68の内を通過し、更に押し込むと、カム当接
軸部56はシャフト22と交差する方向となり、回動中
心軸部54がシャフト22と平行状態なる(図9のハ、
図16、図17)。In the swing arm 50, the inner bracket 7 has a large-diameter lower large-diameter hole 68 and a large-diameter lower large-diameter hole 68 into which the cam abutting shaft portion 56 is movable in the left-right direction.
5 which is in communication with the bush and is inserted into the rotation center shaft portion 54.
Since the gourd-shaped insertion hole 67 including the small-diameter upper small-diameter hole 69 into which 9 is fitted is formed, before the rotation center shaft portion 55 is mounted on the mounting base 60, the cam contact shaft portion 56 is axially oriented. So as to be parallel to the axial direction of the shaft 22 (a in FIG. 9, FIG. 10 and FIG. 11), and then the tip of the cam contacting shaft portion 56 is attached to the lower large diameter hole 68 of the gourd-shaped insertion hole 67. And into the lower large-diameter hole 68 up to the middle of the cam contact shaft 56 (FIGS. 12 and 13). In this state, the tip of the cam contacting shaft portion 56 is inserted so as to face the inside of the bulging portion 10 of the outer bracket 6 (FIG. 9, B, FIG. 14 and FIG. 15). When the bent portion 58 between the rotation center shaft portion 54 and the rotation center shaft portion 54 passes through the inside of the lower large diameter hole 68 and is further pushed, the cam contacting shaft portion 56 becomes a direction intersecting with the shaft 22, and the rotation center shaft portion. 54 becomes parallel to the shaft 22 (C in FIG. 9,
16 and 17).
【0016】この状態では、カム当接軸部56は外側ブ
ラケット6の上下板部9の内面とカム体24の外周との
間の隙間70内に位置し、シャフト22の軸心方向に移
動自在となるので、スイングアーム50を左右に移動さ
せて、回動中心軸部55に挿入したブッシュ63を取付
台60の通過溝61より取付孔62に嵌合させ、回動中
心軸部55側の取付を完了させる。この状態でも、回動
中心軸部55はブッシュ63に対して左右方向には摺動
自在であるから、カム当接軸部56がカム体24に合致
するようにスイングアーム50全体を左右に移動させ、
カム当接軸部56をカム体24の溝27の上方に臨ませ
る(図9のハ、図16、図17)。次に、回動中心軸部
54のブッシュ59を上側小径孔69に嵌合するように
押し込みながら、カム当接軸部56の先端を回動中心軸
部54中心にカム体24側に回動させると、ブッシュ5
9は上側小径孔69に嵌合し、カム当接軸部56は左右
のカム体24の溝27に位置し、係合部57がカム体2
4のカム溝28に係合する。In this state, the cam contacting shaft portion 56 is located in the gap 70 between the inner surface of the upper and lower plate portions 9 of the outer bracket 6 and the outer periphery of the cam body 24, and is movable in the axial direction of the shaft 22. Therefore, the swing arm 50 is moved to the left and right, and the bush 63 inserted into the rotation center shaft portion 55 is fitted into the mounting hole 62 from the passage groove 61 of the mounting base 60, so that the rotation center shaft portion 55 side Complete the installation. Even in this state, since the rotation center shaft 55 is slidable in the left-right direction with respect to the bush 63, the entire swing arm 50 is moved left and right so that the cam contact shaft 56 matches the cam body 24. Let
The cam contact shaft portion 56 is made to face above the groove 27 of the cam body 24 (C in FIG. 9, FIG. 16 and FIG. 17). Next, while pushing the bush 59 of the rotation center shaft portion 54 so as to fit into the upper small diameter hole 69, the tip of the cam contact shaft portion 56 is rotated toward the cam body 24 side around the rotation center shaft portion 54. Bush 5
9 is fitted in the upper small diameter hole 69, the cam contact shaft portion 56 is located in the groove 27 of the left and right cam bodies 24, and the engaging portion 57 is formed in the cam body 2.
4 is engaged with the cam groove 28.
【0017】以上のスイングアーム50の取付工程にお
いて、瓢箪型挿入孔67の下側大径孔68および上側小
径孔69と外側ブラケット6の膨出部10との関係は、
屈曲部58または回動中心軸部54が下側大径孔68内
にあるとき、カム体24の外周と膨出部10の間にカム
当接軸部56が差し込める隙間70を形成し、回動中心
軸部54が上側小径孔69内に位置すると、カム当接軸
部56の先端は外側側板8の内側であって、カム当接軸
部56の係合部57は溝27の間に位置するように構成
しているから、一旦取付が完了すると、係合部57はカ
ム体24の溝27から外れないので、位置決めが容易
で、取付けが簡単容易となる。In the above mounting process of the swing arm 50, the relationship between the lower large diameter hole 68 and the upper small diameter hole 69 of the gourd-shaped insertion hole 67 and the bulging portion 10 of the outer bracket 6 is as follows.
When the bent portion 58 or the rotation center shaft portion 54 is in the lower large diameter hole 68, a gap 70 into which the cam contact shaft portion 56 can be inserted is formed between the outer periphery of the cam body 24 and the bulging portion 10. When the rotation center shaft portion 54 is located in the upper small diameter hole 69, the tip of the cam contact shaft portion 56 is inside the outer side plate 8, and the engagement portion 57 of the cam contact shaft portion 56 is located between the grooves 27. Since the engaging portion 57 is not disengaged from the groove 27 of the cam body 24 once the mounting is completed, the positioning is easy and the mounting is easy.
【0018】また、カム体24の外周には、溝27を深
くするように正円形形状の鍔29が形成されているか
ら、カム当接軸部56の係合部57が最も上側に回動し
てもカム体24の鍔29より外れず、それゆえ、操作不
能状態となるのを防止する。なお、カム体24の外周に
鍔29を形成して、前記取付工程は変化せず、前記隙間
70が鍔29の上部外周と膨出部10の内面との間に形
成されるだけであり、回動中心軸部55側が自由端のと
き、回動中心軸部54を瓢箪型挿入孔67の下側大径孔
68より取付台5内に挿入可能で、回動中心軸部55を
回転自在に位置不動とし、回動中心軸部54を上側小径
孔69に移動させると、係合部57が鍔29より外れな
くなる構成となって、スイングアーム50の屈曲部58
が下側大径孔68の内を通過して、カム当接軸部56が
シャフト22と交差する方向となり、回動中心軸部54
がシャフト22と平行状態なる(図9のハ、図16、図
17)と、カム当接軸部56は外側ブラケット6の膨出
部10の内面と鍔29の周縁との間の隙間70内に位置
し、前記取付工程と同様に、シャフト22の軸心方向に
移動自在となるので、スイングアーム50を左右に移動
させて、回動中心軸部55に挿入したブッシュ63を取
付台60の通過溝61より取付孔62に嵌合させ、回動
中心軸部55側の取付を完了させ、この状態でカム当接
軸部56がカム体24に合致するようにスイングアーム
50全体を左右に移動させ、カム当接軸部56を鍔29
と鍔29の間のカム体24の上方に臨ませ(図9のハ、
図16、図17)、次に、回動中心軸部54のブッシュ
59を上側小径孔69に嵌合するように押し込みなが
ら、カム当接軸部56の先端を回動中心軸部54中心に
カム体24側に回動させ、ブッシュ59を上側小径孔6
9に嵌合させ、カム当接軸部56は左右の鍔29の間に
位置し、係合部57がカム体24のカム溝28に係合す
る。Further, on the outer periphery of the cam body 24, since a regular circular collar 29 is formed so as to deepen the groove 27, the engaging portion 57 of the cam contact shaft portion 56 is rotated to the uppermost side. Even if it does not come off from the collar 29 of the cam body 24, therefore, the inoperable state is prevented. It should be noted that the collar 29 is formed on the outer periphery of the cam body 24, and the attaching step does not change, and the gap 70 is formed only between the upper outer periphery of the collar 29 and the inner surface of the bulging portion 10. When the rotation center shaft portion 55 side is a free end, the rotation center shaft portion 54 can be inserted into the mount 5 through the lower large diameter hole 68 of the gourd-shaped insertion hole 67, and the rotation center shaft portion 55 can be rotated. When the rotation center shaft portion 54 is moved to the upper small-diameter hole 69, the engaging portion 57 cannot be disengaged from the flange 29, and the bending portion 58 of the swing arm 50 is fixed.
Passes through the inside of the large hole 68 on the lower side, and the cam contacting shaft portion 56 becomes a direction intersecting with the shaft 22.
Is parallel to the shaft 22 (C in FIG. 9, FIG. 16 and FIG. 17), the cam contacting shaft portion 56 is in the gap 70 between the inner surface of the bulging portion 10 of the outer bracket 6 and the peripheral edge of the collar 29. Since the swing arm 50 is moved to the left and right, the bush 63 inserted into the rotation center shaft portion 55 is attached to the mounting base 60. The swing arm 50 is fitted into the mounting hole 62 through the passage groove 61 to complete the mounting on the rotation center shaft portion 55 side. In this state, the entire swing arm 50 is moved to the left and right so that the cam contact shaft portion 56 matches the cam body 24. Move the cam contact shaft 56 to the collar 29.
Face the cam body 24 between the collar and the collar 29 (see FIG. 9,
16 and 17), while pushing the bush 59 of the rotation center shaft portion 54 so as to fit into the upper small diameter hole 69, the tip of the cam contact shaft portion 56 is moved to the center of the rotation center shaft portion 54. The bush 59 is rotated to the side of the cam body 24 to move the bush 59 to the upper small diameter hole 6
9, the cam contact shaft portion 56 is located between the left and right flanges 29, and the engaging portion 57 engages with the cam groove 28 of the cam body 24.
【0019】また、スイングアーム50は、取付工程に
おいて、回動中心軸部55は取付台60に対して摺動の
みさせ、カム当接軸部56は瓢箪型挿入孔67の下側大
径孔68より差し込み、その後、回転させるだけである
から、使用状態と相違する角度への捻り、曲げの変形さ
せることなく、取付けることができ、使用状態以外の取
付を考慮した強度設計することは無く、設計が容易であ
るばかりでなく、取付工程において捻り、曲げの変形が
ないので、スイングアーム50は確実に前後回動し、ラ
ンバープレート20は確実に左右均等に作用する。In the mounting process of the swing arm 50, the rotation center shaft 55 is slid only with respect to the mounting base 60, and the cam contact shaft 56 is a large-diameter lower hole of the gourd-shaped insertion hole 67. Since it is only inserted from 68 and then rotated, it can be attached without twisting to an angle different from the used state or deformation of bending, and there is no strength design considering attachment other than the used state, Not only is the design easy, but since there is no twisting or bending deformation during the mounting process, the swing arm 50 reliably rotates back and forth, and the lumbar plate 20 surely acts evenly on the left and right.
【0020】しかして、車両用シート1に着座し、操作
ハンドル45を回動させると、シャフト22が回転し、
シャフト22の回転により回動アーム26が回動し、回
動アーム26の先端に取付けたラチェット25はラッチ
23を押してカム体24をシャフト22を中心に回転さ
せ、ラチェット25はバネ44の弾力により元に戻る。
カム体24が回転すると、ランバープレート20が最後
方位置のときカム溝28の作用によりカム当接軸部56
は回動中心軸部54中心に上方回動し、カム当接軸部5
6はスイングアーム50を回動中心軸部54および回動
中心軸部55中心に前方回転させ、回動中心軸部54お
よび回動中心軸部55はアーム部53を前方回動させて
ランバープレート20を前方向に押し、車両用シート1
の着座者の腰および背部の押圧程度を強く段階調節す
る。When the vehicle is seated on the vehicle seat 1 and the operation handle 45 is rotated, the shaft 22 rotates,
The rotation arm 26 is rotated by the rotation of the shaft 22, and the ratchet 25 attached to the tip of the rotation arm 26 pushes the latch 23 to rotate the cam body 24 around the shaft 22, and the ratchet 25 is moved by the elasticity of the spring 44. Return to the original.
When the cam body 24 rotates, when the lumbar plate 20 is at the rearmost position, the cam groove 28 acts to cause the cam contact shaft portion 56 to move.
Rotates upward about the rotation center shaft portion 54, and the cam contact shaft portion 5
6 swings the swing arm 50 forward around the rotation center shaft portion 54 and the rotation center shaft portion 55, and the rotation center shaft portion 54 and the rotation center shaft portion 55 rotate the arm portion 53 forward to cause the lumbar plate to rotate. Push 20 forward and seat 1 for vehicle
Strongly adjust the degree of pressure on the waist and back of the seated person.
【0021】実施例では、更に操作ハンドル45を回動
させると、ランバープレート20を前方に押し、最前方
位置まで移動すると後退する。この場合、スイングアー
ム50は、左右の回動中心軸部54と回動中心軸部55
の軸心を同一線上に配置し、回動中心軸部54および回
動中心軸部55をそれぞれ取付台5および取付台60に
軸装しているので、カム当接軸部56の回動力がランバ
ープレート20の移動にロスなく伝達され、確実に作用
する。また、カム当接軸部56の回動方向は、回動中心
軸部55中心に上下方向であるから、シート1の前後の
厚みを厚くすることなく、カム当接軸部56の回動幅を
多くでき、それゆえ、ランバープレート20の前後移動
量も大きくする。In the embodiment, when the operation handle 45 is further rotated, the lumbar plate 20 is pushed forward, and when it is moved to the foremost position, it is retracted. In this case, the swing arm 50 includes the left and right rotation center shaft portions 54 and the rotation center shaft portion 55.
Are arranged on the same line, and the rotation center shaft portion 54 and the rotation center shaft portion 55 are mounted on the mounting base 5 and the mounting base 60, respectively. It is transmitted to the movement of the lumbar plate 20 without loss, and acts reliably. Further, since the rotation direction of the cam contact shaft portion 56 is the vertical direction with respect to the center of the rotation center shaft portion 55, the rotation width of the cam contact shaft portion 56 can be increased without increasing the thickness in the front and rear of the seat 1. Therefore, the amount of forward and backward movement of the lumbar plate 20 can be increased.
【0022】しかして、取付台5の外側ブラケット6
は、膨出部10および突起43等を上下対称に形成し、
同様に、内側ブラケット7は瓢箪型挿入孔67を上下に
形成しているから、骨格フレーム4の左右いずれにも取
付けられる。また、カム体24は、左右の鍔29の側面
にそれぞれラッチ23を形成しているから、骨格フレー
ム4の左右いずれにも取付けられる。したがって、部品
点数を削減し、コストを低下させる。Then, the outer bracket 6 of the mounting base 5
Forms the bulging portion 10 and the protrusion 43 and the like symmetrically in the vertical direction,
Similarly, since the inner bracket 7 has the gourd-shaped insertion holes 67 formed in the top and bottom, it can be attached to either the left or right of the skeleton frame 4. Further, since the cam body 24 has the latches 23 formed on the side surfaces of the left and right flanges 29, respectively, it is attached to either the left or right side of the skeleton frame 4. Therefore, the number of parts is reduced and the cost is reduced.
【0023】[0023]
【効果】本発明は、背凭部3の骨格フレーム4の左右側
に設けた調節機構21を有する取付台5および取付台6
0と、該取付台5および取付台60に左右両端をそれぞ
れ取付けたスイングアーム50と、該スイングアーム5
0の中央に設けたランバープレート20とからなるもの
において、前記調節機構21は、前記取付台5の外側ブ
ラケット6および内側ブラケット7に軸装し一端に操作
ハンドル45を取付けた左右方向のシャフト22と、該
シャフト22に回転のみ自在に設けたカム体24と、前
記シャフト22に固定の回動アーム26に取付けた前記
カム体24の逆転を防止するラチェット25と、前記カ
ム体24の側面に形成され前記ラチェット25が係合す
るラッチ23とにより構成し、前記スイングアーム50
は、前記ランバープレート20を取付ける中央の水平部
51と、該水平部51の左右側に形成したアーム部53
と、左右のアーム部53の上端を同一軸心となるように
屈曲させた回動中心軸部54および回動中心軸部55
と、該回動中心軸部54を屈曲させた前記カム体24に
当接するカム当接軸部56とにより構成し、前記内側ブ
ラケット7には、カム当接軸部56が左右方向に移動自
在に入る大径の下側大径孔68と該下側大径孔68に連
通して前記回動中心軸部54に挿通したブッシュ59が
嵌合する小径の上側小径孔69からなる瓢箪型挿入孔6
7を形成したランバーサポート調節装置としたものであ
るから、スイングアーム50のカム当接軸部56を下側
大径孔68に差し込み、回転させ、カム当接軸部56を
シャフト22に交差するようにし、この状態で、他端側
の回動中心軸部55を取付台60に軸装し、次に、回動
中心軸部54に挿通したブッシュ59を上側小径孔69
に嵌合させると、スイングアーム50を変形させること
なく、取付けが完了し、ランバープレート20は左右均
等に着座者の背中を押圧するという作用に悪影響を与え
ない。また、使用状態以外に捻り、曲げの変形させると
いう取付を考慮する必要がないので、設計は容易である
という効果を奏する。また、本発明は、前記の装置にお
いて、前記スイングアーム50のカム当接軸部56は前
記ランバープレート20の軸心方向と交差するようにす
ると共に、前記カム体24は前記シャフト22の放射方
向に形成した溝27の底部にカム溝28を形成し、前記
外側ブラケット6には上側に膨出して前記カム体24の
外周との間に隙間70を形成する膨出部10を形成し、
前記瓢箪型挿入孔67の下側大径孔68および上側小径
孔69と前記膨出部10とは、下側大径孔68は前記隙
間70内をカム当接軸部56が左右方向に移動自在に入
り、上側小径孔69は、前記カム当接軸部56が溝27
に位置すると共に回動中心軸部54のブッシュ59が嵌
合するように構成したランバーサポート調節装置とした
ものであるから、簡単な構成で、スイングアーム50を
変形させることなく取付けられるという効果を奏する。[Effect] According to the present invention, the mounting base 5 and the mounting base 6 having the adjusting mechanism 21 provided on the left and right sides of the skeleton frame 4 of the backrest portion 3 are provided.
0, a swing arm 50 having left and right ends attached to the mount 5 and the mount 60, and the swing arm 5
The adjustment mechanism 21 includes a lumbar plate 20 provided at the center of the shaft 0 and a left-right shaft 22 that is mounted on the outer bracket 6 and the inner bracket 7 of the mounting base 5 and has an operation handle 45 attached to one end thereof. A cam body 24 rotatably mounted on the shaft 22, a ratchet 25 mounted on a rotary arm 26 fixed to the shaft 22 to prevent the cam body 24 from rotating in the reverse direction, and a side surface of the cam body 24. Formed by the latch 23 with which the ratchet 25 is engaged, and the swing arm 50
Is a central horizontal portion 51 to which the lumbar plate 20 is attached, and arm portions 53 formed on the left and right sides of the horizontal portion 51.
And a rotation center shaft portion 54 and a rotation center shaft portion 55 in which the upper ends of the left and right arm portions 53 are bent to have the same axis.
And a cam abutment shaft portion 56 that abuts the cam body 24 in which the rotation center shaft portion 54 is bent. The cam abutment shaft portion 56 is movable in the left-right direction on the inner bracket 7. A gourd-shaped insert formed of a large-diameter lower large-diameter hole 68 and a small-diameter upper small-diameter hole 69 that is in communication with the lower large-diameter hole 68 and into which the bush 59 inserted into the rotation center shaft portion 54 fits. Hole 6
7 is a lumber support adjusting device, the cam contacting shaft portion 56 of the swing arm 50 is inserted into the lower large diameter hole 68 and rotated to intersect the cam contacting shaft portion 56 with the shaft 22. In this state, the rotation center shaft portion 55 on the other end side is mounted on the mounting base 60, and then the bush 59 inserted into the rotation center shaft portion 54 is attached to the upper small diameter hole 69.
, The mounting is completed without deforming the swing arm 50, and the lumbar plate 20 does not adversely affect the action of pressing the back of the seated person evenly on the left and right. In addition, since it is not necessary to consider attachment such as twisting and bending deformation other than the use state, there is an effect that the design is easy. Further, according to the present invention, in the above device, the cam contact shaft portion 56 of the swing arm 50 intersects the axial center direction of the lumbar plate 20, and the cam body 24 extends in the radial direction of the shaft 22. A cam groove 28 is formed at the bottom of the groove 27 formed in the above, and a bulging portion 10 that bulges upward to form a gap 70 between the outer bracket 6 and the outer periphery of the cam body 24 is formed.
The lower large-diameter hole 68 and the upper small-diameter hole 69 of the gourd-shaped insertion hole 67 and the bulging portion 10 are such that the lower large-diameter hole 68 moves the cam contact shaft portion 56 in the left-right direction in the gap 70. The cam contact shaft portion 56 is inserted into the groove 27 in the upper small diameter hole 69.
Since it is the lumbar support adjusting device which is positioned at the same time and is configured so that the bush 59 of the rotation center shaft portion 54 is fitted thereto, the swing arm 50 can be attached with a simple structure without deformation. Play.
【図1】 シートの斜視図。FIG. 1 is a perspective view of a seat.
【図2】 調節機構およびスイングアームの分解斜視
図。FIG. 2 is an exploded perspective view of an adjustment mechanism and a swing arm.
【図3】 同取付状態の斜視図。FIG. 3 is a perspective view of the same attached state.
【図4】 縦断正面図。FIG. 4 is a vertical sectional front view.
【図5】 カム体の側面図。FIG. 5 is a side view of a cam body.
【図6】 同正面図。FIG. 6 is a front view of the same.
【図7】 ラチェットおよび回動アームの側面図。FIG. 7 is a side view of the ratchet and the rotating arm.
【図8】 同取付状態側面図。FIG. 8 is a side view of the same mounting state.
【図9】 スイングアームの取付状態縦断正面図。FIG. 9 is a vertical sectional front view of a swing arm in a mounted state.
【図10】 スイングアームの取付状態斜視図。FIG. 10 is a perspective view of a swing arm in a mounted state.
【図11】 図10の要部側面図。11 is a side view of the main part of FIG.
【図12】 スイングアームの取付状態斜視図。FIG. 12 is a perspective view of a swing arm in a mounted state.
【図13】 図12の要部側面図。13 is a side view of the main part of FIG.
【図14】 スイングアームの取付状態斜視図。FIG. 14 is a perspective view of a swing arm in a mounted state.
【図15】 図14の要部側面図。FIG. 15 is a side view of the main part of FIG.
【図16】 スイングアームの取付状態斜視図。FIG. 16 is a perspective view of a swing arm in a mounted state.
【図17】 図16の要部側面図。FIG. 17 is a side view of the main part of FIG.
【図18】 スイングアームの取付状態斜視図。FIG. 18 is a perspective view of a swing arm in a mounted state.
【図19】 図18の要部側面図。FIG. 19 is a side view of the main part of FIG.
【図20】 係合部がカム体に係合した状態斜視図。FIG. 20 is a perspective view showing a state in which the engagement portion is engaged with the cam body.
【図21】 同縦断正面図。FIG. 21 is a front view of the same section.
【図22】 縦断正面図。FIG. 22 is a vertical sectional front view.
【図23】 カム体の作用状態図。FIG. 23 is an operation state diagram of the cam body.
1…車両用等のシート、2…座席部、3…背凭部、4…
骨格フレーム、5…取付台、6…外側ブラケット、7…
内側ブラケット、8…外側側板、9…上下板部、10…
膨出部、13…挿入孔、14…ボス、15…内側側板、
16…挿入孔、17…ボス、20…ランバープレート、
21…調節機構、22…シャフト、23…ラッチ、24
…カム体、25…ラチェット、26…回動アーム、27
…溝、28…カム溝、29…鍔、30…係合段部、31
…異径部、32…取付嵌合軸、33…二跨部、34…嵌
合溝、35…大径部、36…バネ、40…挿入孔、41
…環状凹部、42…環状凹部、43…突起、44…バ
ネ、45…操作ハンドル、46…環状突起、47…環状
突起、48…ネジ、50…スイングアーム、51…水平
部、52…屈曲部、53…アーム部、54…回動中心軸
部、55…回動中心軸部、56…カム当接軸部、57…
係合部、58…屈曲部、59…ブッシュ、60…取付
台、61…通過溝、62…取付孔、63…ブッシュ、6
4…小径部、67…瓢箪型挿入孔、68…下側大径孔、
69…上側小径孔、70…隙間。DESCRIPTION OF SYMBOLS 1 ... Seat for vehicles, 2 ... Seat part, 3 ... Back part, 4 ...
Skeleton frame, 5 ... Mounting base, 6 ... Outer bracket, 7 ...
Inner bracket, 8 ... Outer side plate, 9 ... Upper and lower plate parts, 10 ...
Bulging portion, 13 ... insertion hole, 14 ... boss, 15 ... inner side plate,
16 ... Insertion hole, 17 ... Boss, 20 ... Lumber plate,
21 ... Adjusting mechanism, 22 ... Shaft, 23 ... Latch, 24
... Cam body, 25 ... Ratchet, 26 ... Rotating arm, 27
... Groove, 28 ... Cam groove, 29 ... Tsuba, 30 ... Engaging step portion, 31
... different diameter part, 32 ... mounting fitting shaft, 33 ... two-sided part, 34 ... fitting groove, 35 ... large diameter part, 36 ... spring, 40 ... insertion hole, 41
... annular recess, 42 ... annular recess, 43 ... protrusion, 44 ... spring, 45 ... operation handle, 46 ... annular protrusion, 47 ... annular protrusion, 48 ... screw, 50 ... swing arm, 51 ... horizontal portion, 52 ... bent portion , 53 ... Arm portion, 54 ... Rotation center shaft portion, 55 ... Rotation center shaft portion, 56 ... Cam contact shaft portion, 57 ...
Engagement portion, 58 ... Bent portion, 59 ... Bushing, 60 ... Mounting base, 61 ... Passage groove, 62 ... Mounting hole, 63 ... Bushing, 6
4 ... small diameter part, 67 ... gourd-shaped insertion hole, 68 ... lower large diameter hole,
69 ... Upper small diameter hole, 70 ... Gap.
【手続補正書】[Procedure amendment]
【提出日】平成6年3月14日[Submission date] March 14, 1994
【手続補正1】[Procedure Amendment 1]
【補正対象書類名】図面[Document name to be corrected] Drawing
【補正対象項目名】全図[Correction target item name] All drawings
【補正方法】変更[Correction method] Change
【補正内容】[Correction content]
【図1】 [Figure 1]
【図2】 [Fig. 2]
【図5】 [Figure 5]
【図6】 [Figure 6]
【図8】 [Figure 8]
【図11】 FIG. 11
【図12】 [Fig. 12]
【図13】 [Fig. 13]
【図3】 [Figure 3]
【図4】 [Figure 4]
【図7】 [Figure 7]
【図9】 [Figure 9]
【図14】 FIG. 14
【図15】 FIG. 15
【図21】 FIG. 21
【図10】 [Figure 10]
【図16】 FIG. 16
【図17】 FIG. 17
【図18】 FIG. 18
【図19】 FIG. 19
【図20】 FIG. 20
【図22】 FIG. 22
【図23】 FIG. 23
Claims (2)
けた調節機構21を有する取付台5および取付台60
と、該取付台5および取付台60に左右両端をそれぞれ
取付けたスイングアーム50と、該スイングアーム50
の中央に設けたランバープレート20とからなるものに
おいて、前記調節機構21は、前記取付台5の外側ブラ
ケット6および内側ブラケット7に軸装し一端に操作ハ
ンドル45を取付けた左右方向のシャフト22と、該シ
ャフト22に回転のみ自在に設けたカム体24と、前記
シャフト22に固定の回動アーム26に取付けた前記カ
ム体24の逆転を防止するラチェット25と、前記カム
体24の側面に形成され前記ラチェット25が係合する
ラッチ23とにより構成し、前記スイングアーム50
は、前記ランバープレート20を取付ける中央の水平部
51と、該水平部51の左右側に形成したアーム部53
と、左右のアーム部53の上端を同一軸心となるように
屈曲させた回動中心軸部54および回動中心軸部55
と、該回動中心軸部54を屈曲させた前記カム体24に
当接するカム当接軸部56とにより構成し、前記内側ブ
ラケット7には、カム当接軸部56が左右方向に移動自
在に入る大径の下側大径孔68と該下側大径孔68に連
通して前記回動中心軸部54に挿通したブッシュ59が
嵌合する小径の上側小径孔69からなる瓢箪型挿入孔6
7を形成したランバーサポート調節装置。1. A mounting base 5 and a mounting base 60 having an adjusting mechanism 21 provided on the left and right sides of the skeleton frame 4 of the backrest 3.
A swing arm 50 having left and right ends attached to the mount 5 and the mount 60, respectively, and the swing arm 50.
Of the lumbar plate 20 provided at the center of the adjustment mechanism 21. The adjustment mechanism 21 includes a shaft 22 in the left-right direction which is mounted on the outer bracket 6 and the inner bracket 7 of the mounting base 5 and has an operation handle 45 attached to one end thereof. A cam body 24 rotatably provided on the shaft 22, a ratchet 25 mounted on a rotary arm 26 fixed to the shaft 22 for preventing reverse rotation, and formed on a side surface of the cam body 24. And the latch 23 with which the ratchet 25 is engaged, and the swing arm 50
Is a central horizontal portion 51 to which the lumbar plate 20 is attached, and arm portions 53 formed on the left and right sides of the horizontal portion 51.
And a rotation center shaft portion 54 and a rotation center shaft portion 55 in which the upper ends of the left and right arm portions 53 are bent to have the same axis.
And a cam abutment shaft portion 56 that abuts the cam body 24 in which the rotation center shaft portion 54 is bent. The cam abutment shaft portion 56 is movable in the left-right direction on the inner bracket 7. A gourd-shaped insert formed of a large-diameter lower large-diameter hole 68 and a small-diameter upper small-diameter hole 69 that is in communication with the lower large-diameter hole 68 and into which the bush 59 inserted into the rotation center shaft portion 54 fits. Hole 6
Lumbar support adjusting device formed 7.
0のカム当接軸部56は前記ランバープレート20の軸
心方向と交差するようにすると共に、前記カム体24は
前記シャフト22の放射方向に形成した溝27の底部に
カム溝28を形成し、前記外側ブラケット6には上側に
膨出して前記カム体24の外周との間に隙間70を形成
する膨出部10を形成し、前記瓢箪型挿入孔67の下側
大径孔68および上側小径孔69と前記膨出部10と
は、下側大径孔68は前記隙間70内をカム当接軸部5
6が左右方向に移動自在に入り、上側小径孔69は、前
記カム当接軸部56が溝27に位置すると共に回動中心
軸部54のブッシュ59が嵌合するように構成したラン
バーサポート調節装置。2. The swing arm 5 according to claim 1.
The cam contact shaft portion 56 of No. 0 intersects with the axial direction of the lumbar plate 20, and the cam body 24 has a cam groove 28 formed at the bottom of a groove 27 formed in the radial direction of the shaft 22. The outer bracket 6 is formed with a bulging portion 10 which bulges upward to form a gap 70 between the outer bracket 6 and the outer periphery of the cam body 24. The lower large diameter hole 68 and the upper side of the gourd-shaped insertion hole 67 The small-diameter hole 69 and the bulging portion 10 are such that the lower large-diameter hole 68 has the cam contacting shaft portion 5 inside the gap 70.
6 is movable in the left-right direction, and the upper small diameter hole 69 is configured so that the cam contact shaft portion 56 is located in the groove 27 and the bush 59 of the rotation center shaft portion 54 is fitted therein. apparatus.
Priority Applications (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35228093A JP3280145B2 (en) | 1993-12-29 | 1993-12-29 | Lumber support adjustment device |
Applications Claiming Priority (1)
Application Number | Priority Date | Filing Date | Title |
---|---|---|---|
JP35228093A JP3280145B2 (en) | 1993-12-29 | 1993-12-29 | Lumber support adjustment device |
Publications (2)
Publication Number | Publication Date |
---|---|
JPH07194461A true JPH07194461A (en) | 1995-08-01 |
JP3280145B2 JP3280145B2 (en) | 2002-04-30 |
Family
ID=18422988
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP35228093A Expired - Lifetime JP3280145B2 (en) | 1993-12-29 | 1993-12-29 | Lumber support adjustment device |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3280145B2 (en) |
-
1993
- 1993-12-29 JP JP35228093A patent/JP3280145B2/en not_active Expired - Lifetime
Also Published As
Publication number | Publication date |
---|---|
JP3280145B2 (en) | 2002-04-30 |
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