JP3904664B2 - Vehicle seat - Google Patents
Vehicle seat Download PDFInfo
- 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
- Authority
- JP
- 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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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
- B60N2/24—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
Landscapes
- 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
[0010]
The main body 1 is composed of a pad (not shown) and a
[0011]
The
[0012]
Further, on the
[0013]
The base plate 4 is provided with a
[0014]
Thus, at the time of a collision, the rotating
[0015]
The
[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
Claims (1)
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 .
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 |
Family
ID=14792083
Family Applications (1)
Application Number | Title | Priority Date | Filing Date |
---|---|---|---|
JP12067297A Expired - Fee Related JP3904664B2 (en) | 1997-05-12 | 1997-05-12 | Vehicle seat |
Country Status (1)
Country | Link |
---|---|
JP (1) | JP3904664B2 (en) |
Cited By (3)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
KR101746450B1 (en) * | 2015-09-18 | 2017-06-27 | 현대자동차주식회사 | Structure of active pan for anti-submarine |
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 |
Families Citing this family (6)
Publication number | Priority date | Publication date | Assignee | Title |
---|---|---|---|---|
JP2001247010A (en) | 1999-12-28 | 2001-09-11 | Takata Corp | Occupant protective device |
JP3912195B2 (en) | 2002-06-12 | 2007-05-09 | タカタ株式会社 | Crew protection device |
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 |
-
1997
- 1997-05-12 JP JP12067297A patent/JP3904664B2/en not_active Expired - Fee Related
Cited By (3)
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 |
Also Published As
Publication number | Publication date |
---|---|
JPH10309967A (en) | 1998-11-24 |
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