JP3904664B2 - Vehicle seat - Google Patents

Vehicle seat Download PDF

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Publication number
JP3904664B2
JP3904664B2 JP12067297A JP12067297A JP3904664B2 JP 3904664 B2 JP3904664 B2 JP 3904664B2 JP 12067297 A JP12067297 A JP 12067297A JP 12067297 A JP12067297 A JP 12067297A JP 3904664 B2 JP3904664 B2 JP 3904664B2
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Japan
Prior art keywords
seat cushion
actuator
base plate
bottom plate
collision
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 - Fee Related
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JP12067297A
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Japanese (ja)
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JPH10309967A (en
Inventor
豊 岡本
賢 華山
裕公 高橋
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Honda Motor Co Ltd
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Honda Motor Co Ltd
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Priority to JP12067297A priority Critical patent/JP3904664B2/en
Publication of JPH10309967A publication Critical patent/JPH10309967A/en
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Publication of JP3904664B2 publication Critical patent/JP3904664B2/en
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    • 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
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/4207—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces
    • B60N2/4214—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal
    • B60N2/4221—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats characterised by the direction of the g-forces longitudinal due to impact coming from the front
    • 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
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42754—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion
    • B60N2/42763—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the cushion with anti-submarining systems
    • 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
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42772—Seats or parts thereof displaced during a crash characterised by the triggering system
    • B60N2/4279—Seats or parts thereof displaced during a crash characterised by the triggering system electric or electronic triggering

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)

Description

【０００１】
【発明の属する技術分野】
本発明は、乗員が着座する車両用のシートに関する。
【０００２】
【従来の技術】
従来、衝突対策として、衝突時に作動するアクチュエータを設け、アクチュエータの作動によりシートクッションの前端部を押上げるようにした車両用シートが特公昭５１−２７０５２号公報と実公平７−２７２４０号公報により知られている。
特公昭５１−２７０５２号公報に記載のものは、シートクッションの前端部をシートクッション本体から分離し、衝突時に伸長動作するシリンダ型の左右１対のアクチュエータによりシートクッションの前端部を押上げるようにしている。
【０００３】
また、実公平７−２７２４０号公報に記載のものでは、シートクッションをシートのベースプレート上に前上り傾動可能となるように軸支し、シートクッションの前端部下面に左右１対のラックを垂設すると共に、ベースプレート上にアクチュエータの作動でワイヤを介して回転される横長の回転軸を軸支し、回転軸の両端に前記両ラックに噛合するピニオンを設け、ピニオンの回転でシートクッションの前端部を押上げ、シートクッションを前上りに傾動させるようにしている。
【０００４】
【発明が解決しようとする課題】
上記前者の従来例は、シートクッションの前端部をアクチュエータで直接押上げる直動式であるため、左右のバランスを取るために２個のアクチュエータが必要になってコストが高くなる不具合がある。
【０００５】
一方、上記後者の従来例は、直動式でないためアクチュエータは１個で足りるが、衝突時にピニオンが瞬間的に高速回転させられるため、ピニオンとラックの噛合箇所の歯折れや歯飛びを生じ易く、信頼性に欠ける不具合がある。
【０００６】
本発明は、以上の点に鑑み、衝突時にシートクッションの前端部を確実に押上げられるようにした信頼性の高い低コストの車両用シートを提供することを課題としている。
【０００７】
【課題を解決するための手段】
上記課題を解決すべく、本発明は、衝突時に作動するアクチュエータを設け、アクチュエータの作動によりシートクッションの前端部を押上げるようにした車両用シートにおいて、シートクッションの本体部を支持するベースプレートと、 シートクッションの前端部を支持するボトムプレートと、ベースプレートに支持され、アクチュエータの作動により回転される横長の回転軸と、該回転軸の両端に設けられた一対のカム部材とを備え、ベースプレートとボトムプレートのうちの一方にガイドスリーブを設けるとともに、他方にガイドピンを設け、ガイドスリーブにガイドピンを係合させてボトムプレートをベースプレートに上下動自在に支持し、回転軸の回転にともなって、カム部材がボトムプレートを押し上げるように構成している。
【０００８】
本発明によれば、衝突時にアクチュエータの作動による回転軸の回転でカム部材を介してシートクッションの前端部が押上げられる。このように、本発明は、直動式でないためアクチュエータは１個で良く、更に、ラックピニオン機構を用いるものに比し構造が簡単で、且つ、歯折れや歯飛びといった故障も生じにくく、コストを安くして信頼性を向上できる。
【０００９】
【発明の実施の形態】
図１は車両用シートのシートクッションを示している。シートクッションは、本体部１と前端のレッグサポート部２と左右のサイドサポート部３，３とに４分割されており、これらを図２に示すベースプレート４上に配置してシートクッションを構成している。
【００１０】
本体部１は、図外のパッドと、パッドを支持するワイヤスプリング１ａを張設したボトムフレーム１ｂとで構成されている。そして、ボトムフレーム１ｂの後端部を横方向の支軸１ｃを介してベースプレート４に軸支し、本体部１を前上りに傾動自在としている。尚、左右のサイドサポート部３，３はベースプレート４の左右のフランジ４ａ，４ａ上に固定される。
【００１１】
レッグサポート部２は、図外のパッドと、パッドを支持するボトムプレート２ａとで構成されている。そして、ボトムプレート２ａの下面に、図３に示す如く、左右１対のガイドスリーブ２ｂ，２ｂを垂設し、一方、ベースプレート４の前端のフランジ４ｂの下面にスティフナ４ｃを取付けて、スティフナ４ｃに左右１対のガイドピン４ｄ，４ｄを植設し、各ガイドスリーブ２ｂを各ガイドピン４ｄにフランジ４ｂに形成した各透孔４ｅを通して摺動自在に外嵌させ、レッグサポート部２を上下動自在に支持している。尚、ボトムプレート２ａには本体部１用のワイヤスプリング１ａの前端が連結されており、レッグサポート部２の上動で本体部１がワイヤスプリング１ａを介して前上りに傾動されるようにしている。
【００１２】
また、ベースプレート４の前端のフランジ４ｂ上には、両端にカム部材５，５を設けた横長の回転軸６が配置されている。各カム部材５は、図４に示す如く、ベース円部５ａとカムトップ部５ｂとを有する卵形に形成されており、フランジ４ｂの上面に凹設した溝形状のカム受け部４ｆに横ずれしないように係合している。カム部材５は、常時は、カムトップ部５ｂが前方を向く前向き姿勢に保持されている。この状態では、レッグサポート部２のボトムプレート２ａの下面がカム部材５のベース円部５ａに上方から当接して、レッグサポート部２は通常の位置に支持される。
【００１３】
ベースプレート４には、衝突時に点火される火薬を内蔵するシリンダ型のアクチュエータ７が設けられており、該アクチュエータ７から導出されるワイヤ８を回転軸６に巻回している。アクチュエータ７は、衝突時に内蔵火薬の点火でワイヤ８を引き込むように作動する。
【００１４】
かくて、衝突時には、アクチュエータ７の作動によりワイヤ８を介して回転軸６が回転され、カム部材５が前向き姿勢から上向き姿勢に回転して、図４（Ｂ）に示す如くカムトップ部５ｂがボトムプレート２ａの下面に当接し、レッグサポート部２が押上げられると共に、ワイヤスプリング１ａを介して本体部１が前上りに傾動される。
【００１５】
尚、レッグサポート部２を本体部１と一体化して、シートクッション全体を前上りに傾動させるようにしても良く、逆に、レッグサポート部２を本体部１から完全に分離し、本体部１を傾動不能としてレッグサポート部２のみを押上げるようにしても良い。
【００１６】
【発明の効果】
以上の説明から明らかなように、本発明によれば、衝突時にシートクッションの前端部を確実に押上げることができ、信頼性が向上すると共に、構造が簡単でアクチュエータも１個で足り、コストを安くできる。
【図面の簡単な説明】
【図１】 本発明を適用する車両用シートのショートクッションの斜視図
【図２】 図１のシートクッションのパッドを取外した状態の斜視図
【図３】 図２のIII−III線拡大截断面図
【図４】 （Ａ）カム部材の配置部を示す斜視図、（Ｂ）衝突時の状態を示す要部の斜視図
【符号の説明】
２ レッグサポート部（シートクッションの前端部）
５ カム部材 ６ 回転軸
７ アクチュエータ ８ ワイヤ[0001]
BACKGROUND OF THE INVENTION
The present invention relates to a vehicle seat on which an occupant is seated.
[0002]
[Prior art]
Conventionally, as a countermeasure against a collision, a vehicle seat provided with an actuator that operates in the event of a collision and pushes up the front end portion of the seat cushion by the operation of the actuator is known from Japanese Patent Publication No. 51-27052 and Japanese Utility Model Publication No. 7-27240. It has been.
In Japanese Patent Publication No. 51-27052, the front end portion of the seat cushion is separated from the seat cushion main body, and the front end portion of the seat cushion is pushed up by a pair of left and right cylinder-type actuators that extend when a collision occurs. ing.
[0003]
Further, in the one described in Japanese Utility Model Publication No. 7-27240, the seat cushion is pivotally supported on the seat base plate so as to be able to tilt forward and a pair of left and right racks are vertically suspended on the lower surface of the front end portion of the seat cushion. In addition, a horizontally long rotating shaft that is rotated via a wire by the operation of an actuator is supported on the base plate, and pinions that engage with both racks are provided at both ends of the rotating shaft, and the front end portion of the seat cushion by rotating the pinion The seat cushion is tilted forward.
[0004]
[Problems to be solved by the invention]
Since the former conventional example is a direct acting type in which the front end portion of the seat cushion is directly pushed up by an actuator, two actuators are required to balance the left and right, resulting in an increase in cost.
[0005]
On the other hand, since the latter conventional example is not a direct acting type, only one actuator is sufficient. However, since the pinion is instantaneously rotated at a high speed at the time of a collision, the pinion and the rack are likely to be broken or skipped. There is a defect that lacks reliability.
[0006]
In view of the above, it is an object of the present invention to provide a highly reliable low-cost vehicle seat that can reliably push up the front end portion of a seat cushion during a collision.
[0007]
[Means for Solving the Problems]
In order to solve the above problems, the present invention provides a base plate for supporting a body portion of a seat cushion in a vehicle seat provided with an actuator that operates at the time of a collision, and pushing up a front end portion of the seat cushion by the operation of the actuator . comprising a bottom plate for supporting the front end of the seat cushion is supported on the base plate, and landscape of the rotary shaft to be Rikai rolling by the operation of the actuator, and a pair of cam members provided at both ends of the rotary shaft, A guide sleeve is provided on one of the base plate and the bottom plate, a guide pin is provided on the other, the guide pin is engaged with the guide sleeve, and the bottom plate is supported on the base plate so as to be movable up and down. The cam member pushes up the bottom plate .
[0008]
According to the present invention, the front end portion of the seat cushion is pushed up via the cam member by the rotation of the rotation shaft by the operation of the actuator at the time of collision. Thus, since the present invention is not a direct-acting type, only one actuator is required, and the structure is simpler than that using a rack and pinion mechanism, and failures such as broken teeth and tooth skipping are less likely to occur. To improve reliability.
[0009]
DETAILED DESCRIPTION OF THE INVENTION
FIG. 1 shows a seat cushion of a vehicle seat. The seat cushion is divided into four parts, a main body part 1, a front leg support part 2, and left and right side support parts 3 and 3, which are arranged on a base plate 4 shown in FIG. 2 to constitute a seat cushion. .
[0010]
The main body 1 is composed of a pad (not shown) and a bottom frame 1b provided with a wire spring 1a for supporting the pad. And the rear-end part of the bottom frame 1b is pivotally supported by the base plate 4 via the horizontal spindle 1c, and the main-body part 1 can be tilted up front. The left and right side support portions 3 and 3 are fixed on the left and right flanges 4 a and 4 a of the base plate 4.
[0011]
The leg support portion 2 includes a pad (not shown) and a bottom plate 2a that supports the pad. Then, as shown in FIG. 3, a pair of left and right guide sleeves 2b and 2b are suspended from the bottom surface of the bottom plate 2a, while a stiffener 4c is attached to the bottom surface of the flange 4b at the front end of the base plate 4 to attach the stiffener 4c. A pair of left and right guide pins 4d, 4d are implanted, and each guide sleeve 2b is slidably fitted to each guide pin 4d through each through hole 4e formed in the flange 4b, so that the leg support 2 can be moved up and down. I support it. The front end of the wire spring 1a for the main body 1 is connected to the bottom plate 2a, and the main body 1 is tilted forwardly upward via the wire spring 1a when the leg support 2 is moved upward. Yes.
[0012]
Further, on the flange 4 b at the front end of the base plate 4, a horizontally long rotating shaft 6 provided with cam members 5 and 5 at both ends is arranged. As shown in FIG. 4, each cam member 5 is formed in an oval shape having a base circular portion 5a and a cam top portion 5b, and does not laterally shift to a groove-shaped cam receiving portion 4f that is recessed in the upper surface of the flange 4b. Are engaged. The cam member 5 is normally held in a forward posture in which the cam top portion 5b faces forward. In this state, the lower surface of the bottom plate 2a of the leg support portion 2 contacts the base circle portion 5a of the cam member 5 from above, and the leg support portion 2 is supported at a normal position.
[0013]
The base plate 4 is provided with a cylinder type actuator 7 containing a gunpowder that is ignited at the time of a collision, and a wire 8 led out from the actuator 7 is wound around the rotary shaft 6. The actuator 7 operates so as to retract the wire 8 by ignition of the built-in gunpowder at the time of collision.
[0014]
Thus, at the time of a collision, the rotating shaft 6 is rotated via the wire 8 by the operation of the actuator 7, the cam member 5 is rotated from the forward posture to the upward posture, and the cam top portion 5b is moved as shown in FIG. The leg support portion 2 is pushed up while being in contact with the lower surface of the bottom plate 2a, and the main body portion 1 is tilted forward through the wire spring 1a.
[0015]
The leg support portion 2 may be integrated with the main body portion 1 so that the entire seat cushion is tilted forwardly. Conversely, the leg support portion 2 is completely separated from the main body portion 1 and the main body portion 1 is separated. It is also possible to push up only the leg support part 2 by making it impossible to tilt.
[0016]
【The invention's effect】
As is apparent from the above description, according to the present invention, the front end portion of the seat cushion can be reliably pushed up in the event of a collision, the reliability is improved, the structure is simple, and only one actuator is required. Can be cheaper.
[Brief description of the drawings]
FIG. 1 is a perspective view of a short cushion of a vehicle seat to which the present invention is applied. FIG. 2 is a perspective view of the seat cushion in FIG. 1 with a pad removed. FIG. 3 is a cross-sectional view taken along line III-III in FIG. FIG. 4A is a perspective view showing a cam member arrangement portion, and FIG. 4B is a perspective view of a main portion showing a state at the time of a collision.
2 Leg support (front end of seat cushion)
5 Cam member 6 Rotating shaft 7 Actuator 8 Wire

Claims (1)

衝突時に作動するアクチュエータを設け、アクチュエータの作動によりシートクッションの前端部を押上げるようにした車両用シートにおいて、
シートクッションの本体部を支持するベースプレートと、
シートクッションの前端部を支持するボトムプレートと、
ベースプレートに支持され、アクチュエータの作動により回転される横長の回転軸と、
該回転軸の両端に設けられた一対のカム部材とを備え、
ベースプレートとボトムプレートのうちの一方にガイドスリーブを設けるとともに、他方にガイドピンを設け、
ガイドスリーブにガイドピンを係合させてボトムプレートをベースプレートに上下動自在に支持し、
回転軸の回転にともなって、カム部材がボトムプレートを押し上げるように構成した
ことを特徴とする車両用シート。In the vehicle seat provided with an actuator that operates at the time of collision, and the front end of the seat cushion is pushed up by the operation of the actuator,
A base plate that supports the body of the seat cushion;
A bottom plate that supports the front end of the seat cushion;
Is supported by the base plate, a horizontal axis of rotation is Rikai rolling by the actuation of the actuator,
A pair of cam members provided at both ends of the rotating shaft ,
A guide sleeve is provided on one of the base plate and the bottom plate, and a guide pin is provided on the other.
A guide pin is engaged with the guide sleeve to support the bottom plate on the base plate so as to be movable up and down.
A vehicle seat characterized in that the cam member pushes up the bottom plate as the rotation shaft rotates .
JP12067297A 1997-05-12 1997-05-12 Vehicle seat Expired - Fee Related JP3904664B2 (en)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP12067297A JP3904664B2 (en) 1997-05-12 1997-05-12 Vehicle seat

Applications Claiming Priority (1)

Application Number Priority Date Filing Date Title
JP12067297A JP3904664B2 (en) 1997-05-12 1997-05-12 Vehicle seat

Publications (2)

Publication Number Publication Date
JPH10309967A JPH10309967A (en) 1998-11-24
JP3904664B2 true JP3904664B2 (en) 2007-04-11

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US11021090B2 (en) 2019-09-27 2021-06-01 Lear Corporation Seat assembly with leg support
US11072265B2 (en) 2019-09-18 2021-07-27 Lear Corporation Vehicle seat assembly with front seat pan height adjustment mechanism

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JP2006007833A (en) 2004-06-22 2006-01-12 Aisin Seiki Co Ltd Vehicular occupant protecting device
JP2006008026A (en) 2004-06-28 2006-01-12 Aisin Seiki Co Ltd Occupant protection device for vehicle
JP5165334B2 (en) * 2007-10-19 2013-03-21 難波プレス工業株式会社 Vehicle seat with rhino support
JP5118995B2 (en) * 2008-02-14 2013-01-16 タカタ株式会社 Passenger restraint device, vehicle seat, vehicle

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
KR101746450B1 (en) * 2015-09-18 2017-06-27 현대자동차주식회사 Structure of active pan for anti-submarine
US11072265B2 (en) 2019-09-18 2021-07-27 Lear Corporation Vehicle seat assembly with front seat pan height adjustment mechanism
US11021090B2 (en) 2019-09-27 2021-06-01 Lear Corporation Seat assembly with leg support

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