JPH0240322B2 - - Google Patents
Info
- Publication number
- JPH0240322B2 JPH0240322B2 JP63158237A JP15823788A JPH0240322B2 JP H0240322 B2 JPH0240322 B2 JP H0240322B2 JP 63158237 A JP63158237 A JP 63158237A JP 15823788 A JP15823788 A JP 15823788A JP H0240322 B2 JPH0240322 B2 JP H0240322B2
- Authority
- JP
- Japan
- Prior art keywords
- curved
- tongue
- apex
- curved member
- curvature
- 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.)
- Expired - Lifetime
Links
- 230000006835 compression Effects 0.000 claims description 9
- 238000007906 compression Methods 0.000 claims description 9
- 238000005452 bending Methods 0.000 description 4
- 238000010276 construction Methods 0.000 description 3
- 230000008878 coupling Effects 0.000 description 1
- 238000010168 coupling process Methods 0.000 description 1
- 238000005859 coupling reaction Methods 0.000 description 1
Classifications
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
- B60N2/667—Lumbar supports having flexible support member bowed by applied forces
- B60N2/6673—Lumbar supports having flexible support member bowed by applied forces with motor driven adjustments
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
- B60N2/667—Lumbar supports having flexible support member bowed by applied forces
-
- B—PERFORMING OPERATIONS; TRANSPORTING
- B60—VEHICLES IN GENERAL
- B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
- B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
- B60N2/64—Back-rests or cushions
- B60N2/66—Lumbar supports
- B60N2/667—Lumbar supports having flexible support member bowed by applied forces
- B60N2/6671—Lumbar supports having flexible support member bowed by applied forces with cable actuators
Landscapes
- Engineering & Computer Science (AREA)
- Aviation & Aerospace Engineering (AREA)
- Transportation (AREA)
- Mechanical Engineering (AREA)
- Chair Legs, Seat Parts, And Backrests (AREA)
- Chairs For Special Purposes, Such As Reclining Chairs (AREA)
- Seats For Vehicles (AREA)
Description
【発明の詳細な説明】
本発明は、脊柱形状に適合させるために湾曲頂
点の高さおよび位置に関して調節可能な湾曲した
支持挿入体を有する特に車輌座席用の背凭れに関
する。DETAILED DESCRIPTION OF THE INVENTION The present invention relates to a backrest, in particular for a vehicle seat, having a curved support insert that is adjustable with respect to the height and position of the curved apex in order to adapt it to the shape of the spinal column.
前記形式の公知の背凭れのばあい支持挿入体は
並べて配置された多数の棒体の支持部材から構成
されており、該支持部材はそれぞれ引張り又は緊
定部材上に通されたスリーブから形成されている
（オーストリア国特許第308318号明細書）。若干の
スリーブはスリーブ軸線に対して傾斜してのびる
端面を有しかつ回動を防止されているので、引張
り部材を緊張したばあい傾斜した端面によつて形
成されたくさび状の中間室が程度の差ことあれ閉
じられかつこれによつて支持部材が湾曲させられ
る。このばあい特に引張り部材を緊張するために
必要な装置のために比較的複雑かつ費用のかかる
構造を有し、この構造のばあい、座席面上方での
湾曲頂点の位置を変えようとするばあいに困難性
が生ずる。 In the case of known backrests of the type mentioned above, the support insert consists of a number of rod support members arranged side by side, each of which is formed from a sleeve threaded over a tensioning or tensioning member. (Austrian Patent No. 308318). Some sleeves have an end surface that extends obliquely to the sleeve axis and are prevented from rotating, so that when the tension member is tensioned, a wedge-shaped intermediate chamber formed by the oblique end surface is formed. any difference is closed and thereby the support member is curved. This has a relatively complex and expensive construction, in particular because of the necessary device for tensioning the tensioning element, and in this construction it is difficult to change the position of the curved apex above the seat surface. Unfortunately, difficulties arise.
従つて本発明の課題は前記欠点を回避して、車
輌座席並びに別の座席にも適していてしかも簡単
かつ安価な構造を有していて、このばあい更に、
それぞれ異なる脊柱形状に完全に適合させるため
に、座席面上方での湾曲頂点の位置を簡単に変え
ることのできる背凭れを提供することにある。 It is therefore an object of the invention to avoid the above-mentioned disadvantages and to provide a simple and inexpensive construction suitable for vehicle seats as well as other seats, in which case it is also possible to
To provide a backrest that can easily change the position of its curved apex above the seat surface in order to perfectly adapt to different spinal column shapes.
前記課題は本発明によれば、支持挿入体が少な
くとも１つの弾性的な湾曲部材、有利には湾曲面
体を有していて、該湾曲部材が一端を支持されて
いてかつ他端を湾曲度を変えるために調節可能で
あり、湾曲部材の湾曲頂点範囲に少なくとも１つ
の調節可能な引張り又は圧縮機構が係合してお
り、上方で支持された湾曲部材が下方で支持体に
上下滑動可能に案内されていて、このばあい湾曲
部材に少なくとも１つの舌状片が枢着されてい
て、この舌状片がほぼ水平方向に案内された調節
ロツドに枢着されており、かつ、湾曲部材の湾曲
頂点範囲に当て付けられた引張りもしくは圧縮機
構のために別の舌状片を有する第２の調節ロツド
が設けられていることによつて解決された。 According to the invention, this object is achieved in that the support insert has at least one elastic curved element, preferably a curved surface, which is supported at one end and has a curved surface at the other end. at least one adjustable tension or compression mechanism engages the curved apex region of the curved member, the curved member supported above being slidably guided up and down to the support below; and in this case at least one tongue is pivotally connected to the bending member, which tongue is pivotally connected to an approximately horizontally guided adjustment rod, and the bending of the bending member is The solution is that a second adjusting rod with a separate tongue is provided for the tensioning or compression mechanism applied in the apex region.
このような本発明の構成によつて、引張り又は
圧縮機構が調節されると、中央から下方に湾曲頂
点が移動させられ、これによつて脊柱の解剖学的
な形状に適合させられる。このばあい引張り又は
圧縮機構を操作するだけでよく、このことは簡単
な補助部材によつて行なわれる。単数又は複数の
湾曲部材を多数の部材から構成する必要はない。
何故ならば前記目的のために十分弾性的にたわむ
材料が与えられているからである。 With this arrangement of the invention, when the tension or compression mechanism is adjusted, the apex of the curvature is moved downwardly from the center, thereby adapting to the anatomical shape of the spinal column. In this case, it is only necessary to operate the tensioning or compression mechanism, and this is done by means of simple auxiliary elements. There is no need for the curved member or members to be composed of multiple members.
This is because a sufficiently elastically flexible material is provided for this purpose.
更にこのような本発明の構成によつて、湾曲部
材の下縁部は支持体から程度の差こそあれ遠くに
走出させられかつこれによつて湾曲度が変えら
れ、このばあい湾曲度を増大させるために圧縮力
がもたらされなければならない。湾曲頂点の位置
も同様の形式で調節される。このばあい調節ロツ
ドは簡単な形式でねじスピンドルおよびナツトを
介して滑動可能である。 Furthermore, with this configuration of the invention, the lower edge of the curved member can be caused to run more or less far from the support and thereby change the degree of curvature, in this case increasing the degree of curvature. A compressive force must be applied to cause the The position of the curved apex is adjusted in a similar manner. In this case, the adjusting rod can be slid in a simple manner via a threaded spindle and a nut.
更に、全体が湾曲部材とケーシングとから構成
されている支持挿入体を、座りごこちを高めるた
めに、フレーム内でばね弾性的に保持することが
できる。 Furthermore, the support insert, which consists entirely of the bending element and the casing, can be held resiliently within the frame in order to enhance seating comfort.
次に図示の実施例につき本発明を説明する。 The invention will now be explained with reference to the illustrated embodiment.
第１図乃至第４図で図示されているように、湾
曲部材４は上方で剛性的な結合部材２２によつて
支持されている。下方では湾曲部材４は支持体２
３の上下滑動可能に案内されていて、このばあい
剛性的な結合部材２２は支持体２３に固定されて
いる。支持体２３には水平方向で案内される調節
ロツド２４が設けられており、該調節ロツド２４
はほぼ半円形横断面を有している。調節ロツド２
４には舌条片２５が枢着されており、該舌条片２
５は湾曲部材４の下端部に係合している。支持体
２３の別の側には第２の調節ロツド２６が滑動可
能に支承されており、該調節ロツド２６には、支
持体に案内された滑り部材２８に対して案内され
た舌状片２７が枢着されており、前記滑り部材２
８には湾曲部材の湾曲頂点に対して案内された圧
縮又は引張り機構２９が係合している。両調節ロ
ツド２４，２６はそれぞれ半分のねじ山３０，３
０ａを備えており、該ねじ山３０，３０ａはハン
ドル車３３，３４と下動に結合されているそれぞ
れ１つのナツト３１，３２と協働する。ハンドル
車３３が回動させられると、調節ロツド２４が滑
動させられかつ舌条片２５を介して湾曲部材の下
端部が上下滑動させられる。これに対してハンド
ル車３４が回動させられたばあいには調節ロツド
２６が滑動させられかつ舌条片２７を介して滑り
部材２８が上下滑動させられひいては圧縮又は引
張り機構２９を介して湾曲部材の湾曲頂点が変え
られる。 As shown in FIGS. 1 to 4, the curved member 4 is supported above by a rigid coupling member 22. As shown in FIGS. Below, the curved member 4 is connected to the support 2
3, the vertically slidingly guided, in this case rigid, connecting member 22 is fixed to a support 23. The support 23 is provided with a horizontally guided adjusting rod 24, which
has an approximately semicircular cross section. Adjustment rod 2
A tongue strip 25 is pivotally attached to the tongue strip 2.
5 engages with the lower end of the curved member 4. A second adjusting rod 26 is slidably mounted on the other side of the support 23 and has a tongue 27 guided against a sliding member 28 guided on the support. are pivotally connected, and the sliding member 2
8 is engaged by a compression or tensioning mechanism 29 guided against the curved apex of the curved member. Both adjustment rods 24, 26 have half threads 30, 3, respectively.
0a, the threads 30, 30a co-operating with a nut 31, 32, respectively, which is connected in a downward movement with a steering wheel 33, 34. When the wheel 33 is turned, the adjusting rod 24 is slid and the lower end of the curved member is slid up and down via the tongue 25. If, on the other hand, the steering wheel 34 is turned, the adjusting rod 26 is slid and the sliding member 28 is caused to slide up and down via the tongue 27 and is then bent via the compression or tension mechanism 29. The curvature apex of the member is changed.
図面は本発明の実施例を示すものであつて、第
１図は車両座席用の背凭れの調節装置の部分断面
図、第２図は第１図の垂直方向の断面図、第３図
は第１図−線に沿つた断面図、第４図は第１
図−線に沿つた断面図である。
４……湾曲部材、２２……結合部材、２３……
支持体、２４，２６……調節ロツド、２５，２７
……舌条片、２８……滑り部材、２９……圧縮又
は引張り機構、３０，３０ａ……ねじ山、３１，
３２……ナツト。
The drawings show an embodiment of the present invention, in which FIG. 1 is a partial sectional view of a backrest adjustment device for a vehicle seat, FIG. 2 is a vertical sectional view of FIG. 1, and FIG. Figure 1 - Sectional view along the line;
FIG. 4... Curved member, 22... Connection member, 23...
Support body, 24, 26... Adjustment rod, 25, 27
... tongue strip, 28 ... sliding member, 29 ... compression or tension mechanism, 30, 30a ... screw thread, 31,
32...Natsuto.
Claims (1)
および位置に関して調節可能な湾曲した支持挿入
体を有する背凭れにおいて、前記支持挿入体が少
なくとも１つの弾性的な湾曲部材４を有してい
て、該湾曲部材４が一端を支持されていてかつ他
端を湾曲度を変えるために調節可能であり、湾曲
部材４の湾曲頂点範囲に少なくとも１つの調節可
能な引張り又は圧縮機構２９が係合しており、上
方で支持された湾曲部材４が下方で支持体２３に
上下滑動可能に案内されていて、このばあい湾曲
部材４に少なくとも１つの舌状片２５が枢着され
ていて、この舌状片がほぼ水平方向に案内された
調節ロツド２４に枢着されており、かつ、湾曲部
材４の湾曲頂点範囲に当て付けられた引張りもし
くは圧縮機構２９のために第２の舌状片２７を有
する第２の調節ロツド２６が設けられていること
を特徴とする背凭れ。 ２ 前記調節ロツド２４，２６がそれぞれ半円形
横断面のねじスピンドル３０，３０ａから形成さ
れていてかつ横断面が共通の１つの円を成すよう
に配置されており、調節ロツドに２つの同心的な
ナツト３１，３２が係合していて、これらナツト
のそれぞれ一方によつてそれぞれ一方の調節ロツ
ド２４もしくは２６が調節可能である、特許請求
の範囲第１項記載の背凭れ。Claims: 1. A backrest with a curved support insert adjustable with respect to the height and position of the curved apex in order to adapt to the shape of the spinal column, said support insert comprising at least one elastic curved member 4. , the curved member 4 is supported at one end and adjustable at the other end to vary the degree of curvature, and at least one adjustable tension or compression mechanism is provided in the apex region of the curved member 4. 29 are engaged, and the curved member 4 supported above is guided vertically and slidably on the support 23 below, in which case at least one tongue 25 is pivotally attached to the curved member 4. This tongue is pivotally connected to an approximately horizontally guided adjusting rod 24 and has a second tension or compression mechanism 29 applied to the region of the curvature apex of the curvature member 4. A backrest characterized in that a second adjustment rod 26 with a tongue 27 is provided. 2. The adjusting rods 24, 26 are each formed from a threaded spindle 30, 30a of semicircular cross section and are arranged in such a way that the cross section forms a common circle; 2. A backrest according to claim 1, characterized in that nuts (31, 32) are engaged, by means of which one of the adjusting rods (24, 26) can be adjusted.
Applications Claiming Priority (2)
| Application Number | Priority Date | Filing Date | Title |
|---|---|---|---|
| AT0049079A AT368958B (en) | 1979-01-24 | 1979-01-24 | BACKREST, ESPECIALLY FOR MOTOR VEHICLE SEATS |
| AT0657079A AT373831B (en) | 1979-10-09 | 1979-10-09 | BACKREST, ESPECIALLY FOR MOTOR VEHICLE SEATS |
Publications (2)
| Publication Number | Publication Date |
|---|---|
| JPS6425808A JPS6425808A (en) | 1989-01-27 |
| JPH0240322B2 true JPH0240322B2 (en) | 1990-09-11 |
Family
ID=25592907
Family Applications (1)
| Application Number | Title | Priority Date | Filing Date |
|---|---|---|---|
| JP63158237A Granted JPS6425808A (en) | 1979-01-24 | 1988-06-28 | Backrest |
Country Status (2)
| Country | Link |
|---|---|
| JP (1) | JPS6425808A (en) |
| DE (1) | DE2947472A1 (en) |
Families Citing this family (36)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5745355U (en) * | 1980-08-29 | 1982-03-12 | ||
| SE445168B (en) * | 1983-01-27 | 1986-06-09 | Be Ge Stolindustri Ab | CHAIRS BACK, SPEC FOR A VEHICLE CHAIR |
| EP0322535A1 (en) * | 1987-12-28 | 1989-07-05 | Wickes Manufacturing Company | Adjustable lumbar support |
| AT394829B (en) | 1989-08-04 | 1992-06-25 | Schuster Wilhelm | BACKREST FOR A VEHICLE SEAT, WITH AN ADJUSTABLE LUMBAR REST |
| AT396055B (en) * | 1989-12-18 | 1993-05-25 | Austro Invest Sa | ANATOMICALLY MOLDABLE SUPPORT |
| DE4220995A1 (en) * | 1992-06-26 | 1994-01-27 | Ameu Management Corp Luxembour | Arching device, in particular for seat backrests |
| DE4320105C1 (en) * | 1993-06-17 | 1994-10-13 | Ameu Management Corp | Adjustment device for a flexurally elastic supporting element of a backrest |
| DE4444803C2 (en) * | 1994-12-15 | 1997-04-24 | Ameu Management Corp | Elastic arch element made of plastic with longitudinal and cross struts for an arch-adjustable lumbar support |
| IT1280436B1 (en) * | 1995-07-19 | 1998-01-20 | Lear Seating Italia Spa | VEHICLE SEAT |
| DE59506315D1 (en) * | 1995-12-23 | 1999-08-05 | Joerg Schwarzbich | Device for fastening a support element to a wire mesh |
| DE19851209C1 (en) | 1998-12-09 | 2000-04-13 | Daimler Chrysler Ag | Back rest for motor vehicle seat has lordosis support with fan blower connected by duct to porous ventilation cover layer |
| US6616227B2 (en) | 2001-02-21 | 2003-09-09 | Schukra North America | Powered actuator for lumbar unit |
| US6619739B2 (en) | 2001-03-01 | 2003-09-16 | L & P Property Management Company | Universal ergonomic support with self-contained actuator |
| US6758522B2 (en) | 2001-03-29 | 2004-07-06 | L&P Property Management Company | Apparatus and method for varying coefficients of friction in a variable apex back support |
| US6691851B2 (en) | 2001-10-03 | 2004-02-17 | L & P Property Management Company | Apparatus and method for ratchet actuator |
| US6637575B2 (en) | 2001-10-03 | 2003-10-28 | L & P Property Management Company | Apparatus and method for thin profile ratchet actuator |
| US6688443B2 (en) | 2001-11-07 | 2004-02-10 | L & P Property Management Company | Apparatus and method for double clutch actuator |
| US6652028B2 (en) | 2001-11-02 | 2003-11-25 | L & P Property Management | Apparatus and method for lumbar support with variable apex |
| US6676214B2 (en) | 2001-11-16 | 2004-01-13 | L & P Property Management Company | Method and apparatus for lumbar support with integrated actuator housing |
| US6668679B2 (en) | 2001-12-07 | 2003-12-30 | L & P Property Management Company | Apparatus and method for pulley actuator |
| US6880424B2 (en) | 2001-12-07 | 2005-04-19 | L & P Property Management Company | Apparatus for telescoping actuator |
| US6652029B2 (en) | 2001-12-20 | 2003-11-25 | L & P Property Management Company | Unitized back plate and lumbar support |
| US6779844B2 (en) | 2001-12-14 | 2004-08-24 | L&P Propety Maqnagement Company | Arching lumbar support with weight distribution surface |
| US6957596B2 (en) | 2002-10-25 | 2005-10-25 | L&P Property Management Company | Apparatus and method for braking ergonomic support actuator |
| US6905170B2 (en) | 2003-01-22 | 2005-06-14 | L & P Property Management Company | Fold down seat lumbar support apparatus and method |
| US6971719B2 (en) | 2003-03-21 | 2005-12-06 | L & P Property Management Company | Clutch actuator surface apparatus and method |
| US7775595B2 (en) | 2004-02-06 | 2010-08-17 | Schukra Of North America | Drive mechanism |
| US7329199B2 (en) | 2004-02-06 | 2008-02-12 | Schukra Of North America | In-line actuator apparatus and method |
| US7216933B2 (en) | 2004-02-21 | 2007-05-15 | Armin Sander | Backrest, particularly for an office chair |
| DE102004034229A1 (en) | 2004-07-15 | 2006-02-16 | Schukra Gerätebau AG | actuator |
| CN100545000C (en) | 2004-07-30 | 2009-09-30 | L&P产权管理公司 | Modular lumbar support apparatus |
| EP1680984B1 (en) | 2005-01-12 | 2007-08-15 | L&P Swiss Holding Company | Lumbar support assembly and corresponding seat structure |
| EP1680983B1 (en) | 2005-01-12 | 2012-11-28 | L&P Swiss Holding Company | Seat structure comprising a coupling unit |
| US7984949B2 (en) | 2007-04-24 | 2011-07-26 | Schukra Of North America | Lumbar and bolster support for second row seat |
| CA2655083C (en) | 2008-02-22 | 2016-07-05 | Schukra Of North America | Constant pressure retreating lumbar system |
| TR2021018620A2 (en) * | 2021-11-26 | 2021-12-21 | Martur Suenger Ve Koltuk Tesisleri Ticaret Ve Sanayi Anonim Sirketi | ADJUSTMENT MECHANISM FOR BACK SUPPORT FOR VEHICLE SEATS |
Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5134783A (en) * | 1974-09-18 | 1976-03-24 | Asahi Carbon Co Ltd | Atsushuku inchoshiken no kajuhakaitenkenshutsuhoho |
Family Cites Families (4)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| DE1786316A1 (en) * | 1968-09-16 | 1972-02-24 | Machines Speciales S A Soc Et | Rotary tool for cutting and / or notching sheet or sheet material and process for its manufacture |
| AT306949B (en) * | 1969-12-12 | 1973-04-25 | Wilhelm Schuster Ing | Covering for lying, sitting and supporting surfaces of all kinds |
| DE2064419C3 (en) * | 1970-12-30 | 1979-08-30 | Recaro Gmbh & Co, 7000 Stuttgart | Backrests for automobile seats |
| AT377484B (en) * | 1978-09-06 | 1985-03-25 | Steyr Daimler Puch Ag | BACKREST, ESPECIALLY FOR MOTOR VEHICLE SEATS |
-
1979
- 1979-11-24 DE DE19792947472 patent/DE2947472A1/en active Granted
-
1988
- 1988-06-28 JP JP63158237A patent/JPS6425808A/en active Granted
Patent Citations (1)
| Publication number | Priority date | Publication date | Assignee | Title |
|---|---|---|---|---|
| JPS5134783A (en) * | 1974-09-18 | 1976-03-24 | Asahi Carbon Co Ltd | Atsushuku inchoshiken no kajuhakaitenkenshutsuhoho |
Also Published As
| Publication number | Publication date |
|---|---|
| DE2947472A1 (en) | 1980-08-07 |
| JPS6425808A (en) | 1989-01-27 |
| DE2947472C2 (en) | 1988-06-30 |
Similar Documents
| Publication | Publication Date | Title |
|---|---|---|
| JPH0240322B2 (en) | ||
| US4334709A (en) | Seat for vehicle | |
| US5651583A (en) | Seat back rest with an adjustment device for a flexible arching element for adjusting the convex curvature of the back rest | |
| US6254187B1 (en) | Arching mechanism | |
| US4832402A (en) | Adjusting mechanism for a chair | |
| EP0328137B1 (en) | Springing and wrap-around element for a seat and/or backrest, and seat embodying the same | |
| US4880271A (en) | Adjustable lumbar support | |
| US4634176A (en) | Back support assembly for vehicle seat | |
| DE19828254C2 (en) | Sitting and / or lying device, in particular driving or aircraft seat | |
| US4469374A (en) | Automotive seat | |
| US6793289B2 (en) | Seat back or seat base of an automobile seat | |
| US20090212615A1 (en) | Lumbar Support | |
| CN105832035A (en) | Chair back with lumbar and pelvic supports | |
| JPS6266810A (en) | Lamber support apparatus | |
| US3385630A (en) | Adjustable body support | |
| EP1872689B1 (en) | Chair with automatically adjustable lumbar support | |
| DE102005049179B3 (en) | Person e.g. corpulent person, weight and center of gravity adaptation device for e.g. seat furniture, has connecting unit that comprises spring unit, where preliminary tension of spring unit of connecting unit is continuously adjustable | |
| US6837543B2 (en) | Seat, for automobiles or the like | |
| GB2059497A (en) | Adjusting seat backs | |
| DE102005035947B4 (en) | Flexible backrest for vehicle seat, has flexible plate element of S cross section secured at upper and lower parts to upper and lower ends of backrest frame, and V-hinge between rear of plate element and neck region of backrest frame | |
| US4628555A (en) | Innerspring mattress | |
| JPH064753Y2 (en) | Lumber support device | |
| JP2021534031A (en) | Adjustable lumbar support for vehicle seats | |
| JPS587244A (en) | Seat with hip part support apparatus | |
| JP2597111Y2 (en) | Vehicle seat structure |