JPH10234507A - Reclining regulating device for seat back - Google Patents

Reclining regulating device for seat back

Info

Publication number
JPH10234507A
JPH10234507A JP4068797A JP4068797A JPH10234507A JP H10234507 A JPH10234507 A JP H10234507A JP 4068797 A JP4068797 A JP 4068797A JP 4068797 A JP4068797 A JP 4068797A JP H10234507 A JPH10234507 A JP H10234507A
Authority
JP
Japan
Prior art keywords
gap
shaped gap
seat back
dimension
wedge
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.)
Pending
Application number
JP4068797A
Other languages
Japanese (ja)
Inventor
Takeshi Nakamura
武 中村
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
NHK Spring Co Ltd
Original Assignee
NHK Spring Co Ltd
Priority date (The priority date 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 date listed.)
Filing date
Publication date
Application filed by NHK Spring Co Ltd filed Critical NHK Spring Co Ltd
Priority to JP4068797A priority Critical patent/JPH10234507A/en
Publication of JPH10234507A publication Critical patent/JPH10234507A/en
Pending legal-status Critical Current

Links

Landscapes

  • Seats For Vehicles (AREA)
  • Chairs For Special Purposes, Such As Reclining Chairs (AREA)

Abstract

PROBLEM TO BE SOLVED: To obtain high angle fixing rigidity, by equipping a lock condition electing means to push a rotating member to a side with smaller dimension gap and a lock releasing condition selecting means to push the rotating members to a side with larger dimension gap in the radial direction in a wedge shaped gap. SOLUTION: An inner cam 4 and a outer ring 5 are equipped on a pivot part to support a seat back obliquely movable to a seat cushion and assembled to be relatively movable in a mutually coaxial relation. The dimension of a wedge shaped gap 6 in the radial direction along the circumferential direction formed between mutually facing plane of the inner cam 4 and the outer ring 5 is gradually changed to form a wedge shaped gap 6. A steel ball 4, a rotating member, is loaded in the wedge shaped gap 6. A plate spring 8, a lock condition selecting means, energizes a steel ball 7 in a direction to push toward the side with smaller gap dimension in the wedge shaped gap 6, and a release lever 10, the lock releasing condition selecting means, is equipped with a claw 9 to push the steel ball 7 toward the side with larger gap dimension.

Description

【発明の詳細な説明】DETAILED DESCRIPTION OF THE INVENTION

【0001】[0001]

【発明の属する技術分野】本発明は、シートバックの傾
動規制装置に関し、特にリクライニングシートの角度固
定剛性の向上、或いは角度調節装置を左右に設けた場合
の左右の角度調節装置間の固定角度のずれの影響を低減
し得るシートバックの傾動規制装置に関するものであ
る。
BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a device for restricting the inclination of a seat back, and more particularly to an improvement in rigidity for fixing an angle of a reclining seat, or a fixing angle between right and left angle adjusting devices when an angle adjusting device is provided on the left and right. The present invention relates to a seatback tilting control device capable of reducing the influence of displacement.

【0002】[0002]

【従来の技術】車両衝突時の乗員の身体拘束性を高める
上には、乗員の上体に掛け渡すショルダベルトのアンカ
ーをシートバックに設けることにより、乗員の上体をシ
ートバックに一体化することが好ましい。しかしその反
面、ショルダベルトのアンカーをシートバックに設ける
と、車両衝突時にベルトに加わる荷重をシートバックが
全面的に受けなければならないので、リクライニング装
置を備えたシートバックの場合、より一層高い角度固定
剛性が要求される。
2. Description of the Related Art In order to increase the physical restraint of an occupant during a vehicle collision, an anchor of a shoulder belt to be hung over the occupant's upper body is provided on the seat back so that the occupant's upper body is integrated with the seat back. Is preferred. However, on the other hand, if the shoulder belt anchor is provided on the seat back, the load applied to the belt in the event of a vehicle collision must be fully received by the seat back. Rigidity is required.

【0003】一方、シートバックの角度固定強度を高め
るには、リクライニングシートの角度調節装置をシート
の左右両側に設けると良いが、ラチェット歯車を用いた
従来の角度調節装置の場合、シートバックに対する組み
付け精度によっては左右の固定角度にずれが生じてしま
い、角度固定時の操作感が低下したり、シートバックの
フレームにねじれが生じたりすることがある。
On the other hand, in order to increase the strength of fixing the angle of the seat back, it is preferable to provide angle adjusting devices for the reclining seat on both the left and right sides of the seat. In the case of a conventional angle adjusting device using a ratchet gear, it is assembled to the seat back. Depending on the accuracy, the right and left fixed angles may be displaced, and the operational feeling when the angles are fixed may be reduced, or the seatback frame may be twisted.

【0004】[0004]

【発明が解決しようとする課題】本発明は、このような
従来技術の問題点を解消するべく案出されたものであ
り、その主な目的は、高い角度固定剛性が得られるリク
ライニングシート用シートバックの傾動規制装置、或い
は、左右両側に角度調節装置を設けた場合に左右の固定
角度にずれが生じないようにすることのできるシートバ
ックの傾動規制装置を提供することにある。
SUMMARY OF THE INVENTION The present invention has been devised to solve such problems of the prior art, and its main object is to provide a seat for a reclining seat capable of obtaining a high angle fixing rigidity. It is an object of the present invention to provide a tilting control device for a seat back, or a tilting control device for a seatback that can prevent a shift between fixed angles at the left and right when an angle adjusting device is provided on both left and right sides.

【0005】[0005]

【課題を解決するための手段】このような目的を果たす
ために、本発明においては、シートバックの傾動が不能
なロック状態と可能なロック解除状態とを選択するため
のシートバックの傾動規制装置を、同軸上で相対回動可
能な内周部材および外周部材と、これら内・外周両部材
の互いの対向面間に形成された楔形隙間と、楔形隙間内
に装填された転動部材と、楔形隙間内で径方向の隙間寸
法が小さい側へ転動部材を押すロック状態選択手段と、
楔形隙間内で径方向の隙間寸法が大きい側へ転動部材を
押すロック解除状態選択手段とを有するものとした。こ
れによると、楔形隙間内で隙間寸法が小さい側へ転動部
材を押すと、転動部材が楔形隙間にくい込むために内・
外周両部材の相対回動が不能となり、楔形隙間内で隙間
寸法が大きい側へ転動部材を押すと、転動部材が自由に
なるために内・外周両部材の相対回動が可能となる。本
装置をショルダベルトのアンカーが設けられたクライニ
ングシートの前傾を阻止するための手段として用いれ
ば、高いロック強度によって大きな角度保持剛性が得ら
れる。また本装置は本質的に無段階角度固定機能を備え
るので、有段階角度固定手段が一側に設けられたリクラ
イニングシートの他側の固定手段として用いれば、左右
の角度ずれが問題とならなくなる。
In order to achieve the above object, according to the present invention, there is provided a seatback tilt regulating device for selecting a locked state in which the seatback cannot be tilted and an unlocked state in which the seatback can be tilted. An inner peripheral member and an outer peripheral member that can be relatively rotated on the same axis, a wedge-shaped gap formed between opposing surfaces of the inner and outer members, and a rolling member loaded in the wedge-shaped gap, Lock state selecting means for pushing the rolling member to the side where the radial gap dimension is smaller in the wedge-shaped gap,
An unlocked state selecting means for pressing the rolling member to the side where the radial clearance dimension is larger in the wedge-shaped clearance is provided. According to this, when the rolling member is pushed to the side where the gap dimension is smaller in the wedge-shaped gap, the rolling member is hardly inserted into the wedge-shaped gap.
When the rolling member is pushed to the side where the gap dimension is large in the wedge-shaped gap, the rolling member becomes free, so that the relative rotation of the inner and outer members becomes possible. . If this device is used as a means for preventing the tilting of the seating belt provided with the shoulder belt anchor, a high angle holding rigidity can be obtained by a high lock strength. Further, since the present apparatus essentially has the stepless angle fixing function, if the stepped angle fixing means is used as the fixing means on the other side of the reclining seat provided on one side, the left and right angle shift does not become a problem.

【0006】[0006]

【発明の実施の形態】以下に添付の図面に示された一実
施例を参照して本発明の構成について詳細に説明する。
DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS The structure of the present invention will be described below in detail with reference to an embodiment shown in the accompanying drawings.

【0007】図1は、本発明に基づき構成されたシート
バックの傾動規制装置を示している。本装置1は、シー
トクッション2に対してシートバック3を傾動可能に支
持するピボット部に設けられ(図2参照)、図3に併せ
て示すように、互いに同軸的関係をもって相対回転可能
に組み合わされたインナカム4(内周部材)およびアウ
タリング5(外周部材)と、これらインナカム4および
アウタリング5の互いの対向面間に形成された円周方向
に沿って径方向隙間の寸法が徐々に変化する楔形隙間6
と、楔形隙間6内に装填された鋼球7(転動部材)と、
楔形隙間6内で隙間寸法が小さい側へ押す向きに鋼球7
を弾発付勢する板ばね8(ロック状態選択手段)と、楔
形隙間6内で隙間寸法が大きい側へ鋼球7を押す爪9が
設けられたレリーズレバー10(ロック解除状態選択手
段)とからなっている。
FIG. 1 shows a device for restricting the tilt of a seat back constructed according to the present invention. The present device 1 is provided on a pivot portion that supports the seat back 3 in a tiltable manner with respect to the seat cushion 2 (see FIG. 2), and as shown in FIG. The size of the radial gap along the circumferential direction formed between the inner cam 4 (inner peripheral member) and the outer ring 5 (outer peripheral member) formed between the inner cam 4 and the outer ring 5 facing each other gradually increases. Changing wedge-shaped gap 6
And a steel ball 7 (rolling member) loaded in the wedge-shaped gap 6;
The steel ball 7 is pushed in the wedge-shaped
And a release lever 10 (lock release state selection means) provided with a claw 9 for pushing the steel ball 7 to the side of the wedge-shaped gap 6 where the gap dimension is large. Consists of

【0008】アウタリング5は、内周面5aが真円輪郭
の円環状をなし、シートバック3側に設けられたステー
11(図2)に対してねじ或いはリベットをもって固定
される。
The outer ring 5 has an inner peripheral surface 5a formed in an annular shape having a perfect circular contour, and is fixed to a stay 11 (FIG. 2) provided on the seat back 3 side with screws or rivets.

【0009】インナカム4は、外周輪郭がミリングカッ
タの断面様をなし、円周を6等分する位置に概ね鋸刃状
の突起12が形成されている。これらの各突起12の傾
斜面12aとアウタリング5の内周面5aとの間に上記
の如き楔形隙間6が形成され、各楔形隙間6内にそれぞ
れ鋼球7が装填されている。
[0009] The inner cam 4 has an outer contour that is a cross section of a milling cutter, and has a substantially saw blade-shaped projection 12 formed at a position that divides the circumference into six equal parts. The wedge-shaped gap 6 as described above is formed between the inclined surface 12a of each of the projections 12 and the inner peripheral surface 5a of the outer ring 5, and a steel ball 7 is loaded in each of the wedge-shaped gaps 6.

【0010】板ばね8は、インナカム4の輪郭と概ね相
似形をなすベース部8aの外周部の円周を6等分する位
置に、軸線方向に突出形成されており、断面がU字形を
なしている。これらの各板ばね8は、各鋸刃状突起12
の刃先部分、つまり楔形隙間6内における径方向隙間寸
法が最も大きくなる部分にそれぞれ突入している。
The leaf spring 8 is formed so as to protrude in the axial direction at a position that divides the circumference of the outer peripheral portion of the base portion 8a substantially similar to the contour of the inner cam 4 into six, and has a U-shaped cross section. ing. Each of these leaf springs 8 has a corresponding saw blade-shaped projection 12.
, Ie, portions where the radial gap size in the wedge-shaped gap 6 is the largest.

【0011】レリーズレバー10は、アウタリング5と
概ね等しい寸法の環状をなすベース部10aの内周縁の
円周を6等分する位置に、軸線方向に突出形成された爪
9を備えており、互いに隣り合う鋼球7同士間に各爪9
をそれぞれ突入させている。
The release lever 10 has a claw 9 projecting in the axial direction at a position where the circumference of the inner peripheral edge of the annular base portion 10a having substantially the same dimensions as the outer ring 5 is equally divided into six. Each claw 9 between steel balls 7 adjacent to each other
Are rushing into each.

【0012】これらレリーズレバー10、板ばね8、お
よびインナカム4は、シートクッション2側に固定され
るブラケット13に対し、ねじ手段或いはリベットをも
って同軸的に固定される。そしてアウタリング5が固定
されたステー11をブラケット13に突設された軸14
の軸端に接続することにより、シートクッション2に対
してシートバック3が傾動可能に支持されることとな
る。
The release lever 10, the leaf spring 8 and the inner cam 4 are coaxially fixed to the bracket 13 fixed to the seat cushion 2 by screw means or rivets. Then, the stay 11 to which the outer ring 5 is fixed is connected to the shaft 14 protruding from the bracket 13.
, The seat back 3 is supported to be tiltable with respect to the seat cushion 2.

【0013】次に本発明装置の作動要領について図4並
びに図5を併せて参照して説明する。
Next, the operation of the apparatus of the present invention will be described with reference to FIGS.

【0014】アウタリング5をインナカム4に対して図
1における時計方向(図4の矢印A方向)へ回動させる
と、アウタリング5の内周面との間に作用する摩擦力と
板ばね8の付勢力とにより、楔形隙間6内の鋼球7も同
様にA方向へ移動しようとする。すると楔形隙間6内に
おける径方向隙間の狭い側に鋼球7がくい込む(図4参
照)。この時の楔効果によってアウタリング5の回動が
阻止される。つまりシートバック3が現角度で固定され
る。
When the outer ring 5 is rotated with respect to the inner cam 4 in the clockwise direction in FIG. 1 (the direction of arrow A in FIG. 4), the frictional force acting between the outer ring 5 and the inner peripheral surface of the outer ring 5 and the leaf spring 8 , The steel ball 7 in the wedge-shaped gap 6 also tries to move in the direction A. Then, the steel ball 7 bites into the narrow side of the radial gap in the wedge-shaped gap 6 (see FIG. 4). The rotation of the outer ring 5 is prevented by the wedge effect at this time. That is, the seat back 3 is fixed at the current angle.

【0015】アウタリング5を反時計方向(図5の矢印
B方向)へ回動させると、楔形隙間6内における径方向
隙間の広い側に鋼球7が移動するので、アウタリング5
の回動、即ちシートバック3の傾動が許容される。ま
た、板ばね8の付勢力に抗してレリーズレバー10の爪
9で反時計方向へ鋼球7を押し付けると、鋼球7のくい
込み方向への移動が阻止されるため、アウタリング5の
回動が自由になる(図5参照)。これにより、シートバ
ック3の角度調節が自由に行える。
When the outer ring 5 is rotated in the counterclockwise direction (the direction of arrow B in FIG. 5), the steel ball 7 moves to the side of the wedge-shaped gap 6 where the radial gap is larger.
, That is, the tilt of the seat back 3 is allowed. Further, when the steel ball 7 is pressed counterclockwise with the claw 9 of the release lever 10 against the urging force of the leaf spring 8, the movement of the steel ball 7 in the biting direction is prevented. Movement is free (see FIG. 5). Thereby, the angle of the seat back 3 can be freely adjusted.

【0016】本発明装置はいわばリクライニング角度の
無段階調節装置なので、従来のラチェット式の有段階調
節装置が左右の一方の側に設けられたシートの他方の側
に本装置を設け、かつ有段階調節装置のロック解除レバ
ーと本装置1のレリーズレバー10とを連動連結すれ
ば、左右の固定角度がずれることが皆無となる。
Since the apparatus of the present invention is a stepless adjustment apparatus for a reclining angle, a conventional ratchet type stepped adjustment apparatus is provided on the other side of a seat provided on one of the left and right sides, and the stepped adjustment apparatus is provided. If the lock release lever of the adjusting device and the release lever 10 of the present device 1 are connected in an interlocked manner, the left and right fixed angles will not be shifted.

【0017】また本装置1をシートバック3の前傾規制
装置として用いれば、ショルダベルト15のアンカー1
6がシートバック3に設けられているものであっても、
衝突時に乗員が前方へ移動しようとする慣性力がベルト
に加わった際のシートバック3の角度保持剛性が高まる
ので、乗員の拘束性能がより一層高まる。
If the device 1 is used as a device for restricting the seat back 3 from leaning forward, the anchor 1 of the shoulder belt 15 can be used.
Even if 6 is provided on the seat back 3,
The angle holding rigidity of the seat back 3 when the inertia force for the occupant to move forward at the time of collision is applied to the belt is increased, so that the occupant restraint performance is further enhanced.

【0018】[0018]

【発明の効果】このように本発明によれば、リクライニ
ングシート用シートバックの傾動規制装置において、角
度固定剛性をより一層高めること、或いは、左右両側に
角度調節装置を設けた場合の左右の固定角度ずれの影響
を低減することができる。
As described above, according to the present invention, it is possible to further increase the rigidity for fixing the angle of the seat back for the reclining seat, or to fix the right and left when the angle adjusting device is provided on both the left and right sides. The effect of the angle shift can be reduced.

【図面の簡単な説明】[Brief description of the drawings]

【図1】本発明装置の組立状態の側面図。FIG. 1 is a side view of an assembled state of a device according to the present invention.

【図2】本発明装置が適用されたシートの斜視図。FIG. 2 is a perspective view of a sheet to which the apparatus of the present invention is applied.

【図3】本発明装置の分解拡散図。FIG. 3 is an exploded view of the apparatus of the present invention.

【図4】ロック状態を示す要部拡大図。FIG. 4 is an enlarged view of a main part showing a locked state.

【図5】ロック解除状態を示す要部拡大図。FIG. 5 is an enlarged view of a main part showing an unlocked state.

【符号の説明】[Explanation of symbols]

1 傾動規制装置 2 シートクッション 3 シートバック 4 インナカム 5 アウタリング 5a 内周面 6 楔形隙間 7 鋼球 8 板ばね 8a ベース部 9 爪 10 レリーズレバー 10a ベース部 11 ステー 12 鋸刃状突起 12a 傾斜面 13 ブラケット 14 軸 15 ショルダベルト 16 アンカー REFERENCE SIGNS LIST 1 tilt control device 2 seat cushion 3 seat back 4 inner cam 5 outer ring 5 a inner peripheral surface 6 wedge-shaped gap 7 steel ball 8 leaf spring 8 a base portion 9 claw 10 release lever 10 a base portion 11 stay 12 saw-toothed protrusion 12 a inclined surface 13 Bracket 14 Shaft 15 Shoulder belt 16 Anchor

Claims (3)

【特許請求の範囲】[Claims] 【請求項1】 シートバックの傾動が、不能なロック状
態と可能なロック解除状態とを選択するためのシートバ
ックの傾動規制装置であって、 同軸上で相対回動可能な内周部材および外周部材と、こ
れら内・外周両部材の互いの対向面間に形成された楔形
隙間と、該楔形隙間内に装填された転動部材と、前記楔
形隙間内で径方向の隙間寸法が小さい側へ前記転動部材
を押すロック状態選択手段と、前記楔形隙間内で径方向
の隙間寸法が大きい側へ前記転動部材を押すロック解除
状態選択手段とを有することを特徴とするシートバック
の傾動規制装置。
1. A seat back tilt restricting device for selecting between a locked state in which tilting of the seat back is not possible and an unlocked state in which tilting of the seat back is possible. A member, a wedge-shaped gap formed between the opposing surfaces of the inner and outer members, a rolling member loaded in the wedge-shaped gap, and a radial gap in the wedge-shaped gap having a smaller gap dimension. A seat back tilt control comprising: a lock state selecting unit that presses the rolling member; and an unlock state selecting unit that presses the rolling member to a side having a larger radial dimension in the wedge-shaped gap. apparatus.
【請求項2】 有段階角度固定手段が一側に設けられた
リクライニングシートの他側に設けられるものであるこ
とを特徴とする請求項1に記載のシートバックの傾動規
制装置。
2. The device according to claim 1, wherein the stepped angle fixing means is provided on the other side of the reclining seat provided on one side.
【請求項3】 ショルダベルトのアンカーが設けられた
リクライニングシートの前傾を阻止するためのものであ
ることを特徴とする請求項1に記載のシートバックの傾
動規制装置。
3. The device according to claim 1, wherein the device is provided to prevent the reclining seat provided with the shoulder belt anchor from leaning forward.
JP4068797A 1997-02-25 1997-02-25 Reclining regulating device for seat back Pending JPH10234507A (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP4068797A JPH10234507A (en) 1997-02-25 1997-02-25 Reclining regulating device for seat back

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP4068797A JPH10234507A (en) 1997-02-25 1997-02-25 Reclining regulating device for seat back

Publications (1)

Publication Number Publication Date
JPH10234507A true JPH10234507A (en) 1998-09-08

Family

ID=12587472

Family Applications (1)

Application Number Title Priority Date Filing Date
JP4068797A Pending JPH10234507A (en) 1997-02-25 1997-02-25 Reclining regulating device for seat back

Country Status (1)

Country Link
JP (1) JPH10234507A (en)

Cited By (10)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2795372A1 (en) 1999-06-24 2000-12-29 Nhk Spring Co Ltd Hinge mechanism, for vehicle seat, has seat support and back support fitted together by co-axial circular elements, with acceleration sensitive device locking on to toothed outer edge of one of elements.
GB2356803A (en) * 1999-11-16 2001-06-06 Nhk Spring Co Ltd Rotation limiting device
JP2007236866A (en) * 2006-03-13 2007-09-20 Toyota Boshoku Corp Joint device
WO2007111414A1 (en) * 2006-03-24 2007-10-04 Austem Co., Ltd. Pumping device and height adjuster for vehicle seat
WO2007123367A1 (en) * 2006-04-26 2007-11-01 Austem Co., Ltd. Seat recliner for vehicle with high strength
JP2010155000A (en) * 2008-12-31 2010-07-15 Imasen Electric Ind Co Ltd Reclining apparatus
US8109373B2 (en) 2006-03-24 2012-02-07 Austem Co., Ltd. Pumping device and height adjuster for vehicle seat
JP2016037065A (en) * 2014-08-05 2016-03-22 テイ・エス テック株式会社 Slide rail device
CN112848992A (en) * 2019-11-26 2021-05-28 卫仁妹 Mechanism angle adjusting device and application thereof
CN112848993A (en) * 2019-11-26 2021-05-28 卫仁妹 Mechanism angle adjusting device and application thereof

Cited By (12)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
FR2795372A1 (en) 1999-06-24 2000-12-29 Nhk Spring Co Ltd Hinge mechanism, for vehicle seat, has seat support and back support fitted together by co-axial circular elements, with acceleration sensitive device locking on to toothed outer edge of one of elements.
US6474734B1 (en) 1999-06-24 2002-11-05 Nhk Spring Co., Ltd. Emergency locking seat hinge device and vehicle seat using the same
GB2356803A (en) * 1999-11-16 2001-06-06 Nhk Spring Co Ltd Rotation limiting device
US6616241B1 (en) 1999-11-16 2003-09-09 Nhk Spring Co., Ltd. Rotation limiting device and seat recliner device using the same
JP2007236866A (en) * 2006-03-13 2007-09-20 Toyota Boshoku Corp Joint device
WO2007111414A1 (en) * 2006-03-24 2007-10-04 Austem Co., Ltd. Pumping device and height adjuster for vehicle seat
US8109373B2 (en) 2006-03-24 2012-02-07 Austem Co., Ltd. Pumping device and height adjuster for vehicle seat
WO2007123367A1 (en) * 2006-04-26 2007-11-01 Austem Co., Ltd. Seat recliner for vehicle with high strength
JP2010155000A (en) * 2008-12-31 2010-07-15 Imasen Electric Ind Co Ltd Reclining apparatus
JP2016037065A (en) * 2014-08-05 2016-03-22 テイ・エス テック株式会社 Slide rail device
CN112848992A (en) * 2019-11-26 2021-05-28 卫仁妹 Mechanism angle adjusting device and application thereof
CN112848993A (en) * 2019-11-26 2021-05-28 卫仁妹 Mechanism angle adjusting device and application thereof

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