JP4940744B2 - Vehicle seat - Google Patents

Vehicle seat Download PDF

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Publication number
JP4940744B2
JP4940744B2 JP2006118761A JP2006118761A JP4940744B2 JP 4940744 B2 JP4940744 B2 JP 4940744B2 JP 2006118761 A JP2006118761 A JP 2006118761A JP 2006118761 A JP2006118761 A JP 2006118761A JP 4940744 B2 JP4940744 B2 JP 4940744B2
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backrest
headrest
vehicle
rotating body
spaces
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JP2007290466A (en
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明彦 沖村
美照 五十嵐
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Oiles Corp
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Oiles Corp
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Priority to JP2006118761A priority Critical patent/JP4940744B2/en
Priority to PCT/JP2007/000434 priority patent/WO2007129455A1/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
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • 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
    • B60N2/80—Head-rests
    • B60N2/888—Head-rests with arrangements for protecting against abnormal g-forces, e.g. by displacement of the head-rest

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Chair Legs, Seat Parts, And Backrests (AREA)
  • Seats For Vehicles (AREA)

Description

本発明は、車両において追突された時等に後方からの衝撃を受けて慣性により着座者が後方に移動する際に前方移動して着座者の頭部を支持するヘッドレストを有した車両用シートに関する。   The present invention relates to a vehicle seat having a headrest that moves forward to support a head of a seated person when the seated person moves backward due to inertia when receiving a shock from the rear, for example, when a rear-end collision occurs in a vehicle. .

特開平１０−１８１４０３号公報Japanese Patent Laid-Open No. 10-181403 特開平１０−１１９６１９号公報JP-A-10-119619 特開平１１−２６８５６６号公報JP-A-11-268565 特開２００３−８１０４４号公報JP 2003-81044 A 特開２００５−２２５３３４号公報JP 2005-225334 A 特開２００６−８２７７２号公報Japanese Patent Laid-Open No. 2006-82772 特開２００６−８８８７５号公報JP 2006-88875 A

車両において、追突された時等に着座者の頭部を拘束するためにヘッドレストを前方に移動させるようにした車両用シートが提案されている。   In a vehicle, a vehicle seat has been proposed in which a headrest is moved forward in order to restrain a seated person's head when a rear-end collision occurs.

ところで、斯かる車両用シートにおいては、通常の走行時に不用意にヘッドレストが前方に移動すると、着座者が前屈みになって、操縦性を悪化させたり、乗り心地を悪くするので、追突された時等とそうでない時とを識別して追突された時等のみにヘッドレストを前方に移動させることが必要であるが、斯かる識別機構を車両用シートの背凭れ等にコンパクトに設置できるものは未だ提案されていない。   By the way, in such a vehicle seat, if the headrest moves inadvertently during normal driving, the seated person will bend forward, and the maneuverability will deteriorate and the ride comfort will deteriorate. It is necessary to move the headrest forward only when a rear-end collision is made by distinguishing between when it is not and so on, but there is still something that can be installed compactly on the back of a vehicle seat etc. Not proposed.

本発明は上記諸点に鑑みなされたものであり、その目的とするところは、追突された時等とそうでない時とを的確に識別して追突された時等のみにヘッドレストを前方に確実に移動させることができ、しかも、背凭れ等にコンパクトに設置できる車両用シートを提供することにある。   The present invention has been made in view of the above-described points, and the object of the present invention is to accurately move the headrest forward only when a rear-end collision is made by accurately discriminating between a rear-end collision and other times. Another object of the present invention is to provide a vehicle seat that can be installed compactly on a backrest or the like.

本発明の車両用シートは、車両の背凭れと、この背凭れに車両の前方に移動自在に支持されたヘッドレストと、このヘッドレストを前方に移動付勢する移動付勢手段と、ヘッドレストの前方への移動を禁止する禁止機構と、この禁止機構によるヘッドレストの前方への移動禁止を背凭れに加わる車両の後方への一定以上の加速度で解除させる解除手段とを具備しており、ここで、解除手段は、背凭れに加わる車両の後方への一定以上の加速度に基づく力を禁止機構に伝達する伝達機構を有している。   A vehicle seat according to the present invention includes a backrest of a vehicle, a headrest supported by the backrest so as to be movable forward of the vehicle, moving urging means for urging and moving the headrest forward, and forward of the headrest. A prohibiting mechanism for prohibiting the movement of the headrest, and a releasing means for releasing the prohibition of the headrest moving forward by the prohibiting mechanism with a certain acceleration beyond the back of the vehicle that is added to the backrest. The means includes a transmission mechanism that transmits a force based on an acceleration of a certain level or more applied to the backrest to the prohibition mechanism.

本発明の車両用シートによれば、禁止機構によるヘッドレストの前方への移動禁止を背凭れに加わる車両の後方への一定以上の加速度で解除させる解除手段が背凭れに加わる車両の後方への一定以上の加速度に基づく力を禁止機構に伝達する伝達機構を有しているので、追突された時等とそうでない時とを的確に識別して追突された時等のみにヘッドレストを確実に前方に移動させることができる。   According to the vehicle seat of the present invention, the release means for releasing the prohibition of the headrest forward movement by the prohibiting mechanism at a certain acceleration beyond the back of the vehicle applied to the backrest is fixed to the back of the vehicle applied to the backrest. Since it has a transmission mechanism that transmits the force based on the above acceleration to the prohibition mechanism, the headrest can be reliably moved forward only when it is rearranged by accurately distinguishing when it is impacted and when it is not Can be moved.

解除手段は、背凭れの背受部に加わる荷重により変位される荷重−変位変換機構を有してもよく、伝達機構は、速度依存性の抵抗力を発生する抵抗力発生器を有していてもよく、この場合、荷重−変位変換機構は、背凭れのフレームに回動自在に支持されていると共に背凭れの背受部に配された荷重受板を具備していてもよく、抵抗力発生器は、一方では荷重−変位変換機構に連結されていると共に他方では禁止機構に連結されていてもよい。   The release means may have a load-displacement conversion mechanism that is displaced by a load applied to the backrest of the backrest, and the transmission mechanism has a resistance force generator that generates a speed-dependent resistance force. In this case, the load-displacement conversion mechanism may include a load receiving plate that is rotatably supported by the backrest frame and is disposed on the backrest portion of the backrest. The force generator may be connected on the one hand to the load-displacement conversion mechanism and on the other hand to the prohibiting mechanism.

抵抗力発生器は、一方の回転体と、この一方の回転体に対して相対的に回転自在な他方の回転体と、両回転体の間に介在されていると共に一方の回転体に対する他方の回転体の相対的な回転で相補的に容積が増減する少なくとも二つの空間と、この少なくとも二つの空間に収容された液体と、一方の回転体に対する他方の回転体の相対的な回転で増減する少なくとも二つの空間に対して流出入する液体の流速に応じた大きさの抵抗力を発生するオリフィス手段とを具備していても、これに代えて又はこれと共に、一方の直動体と、この一方の直動体に対して相対的に直動自在な他方の直動体と、両直動体の間に介在されていると共に一方の直動体に対する他方の直動体の相対的な直動で相補的に容積が増減する少なくとも二つの空間と、この少なくとも二つの空間に収容された液体と、一方の直動体に対する他方の直動体の相対的な直動で増減する少なくとも二つの空間に対して流出入する液体の流速に応じた大きさの抵抗力を発生するオリフィス手段とを具備していてもよい。   The resistance force generator includes one rotating body, the other rotating body rotatable relative to the one rotating body, and the other rotating body interposed between the rotating bodies and the other rotating body. At least two spaces whose volumes increase or decrease complementarily by the relative rotation of the rotating body, the liquid contained in the at least two spaces, and the relative rotation of the other rotating body with respect to one rotating body increase or decrease In addition to or in addition to the orifice means for generating a resistance force having a magnitude corresponding to the flow velocity of the liquid flowing into and out of the at least two spaces, one linear motion body and one of these The other linear moving body that is relatively movable relative to the linear moving body, and the volume that is interposed between the two linear moving bodies and that is complementary to the relative linear movement of the other linear moving body relative to the one linear moving body. And at least two spaces that increase or decrease A resistance of a magnitude corresponding to the flow rate of the liquid flowing into and out of at least two spaces that increase or decrease with the relative movement of the other linear moving body with respect to one liquid moving body and the liquid contained in at least two spaces And orifice means for generating a force.

本発明においては、ヘッドレストは、背凭れに前方に回動又は直動自在に支持されており、移動付勢手段は、ヘッドレストを前方に回動又は直動付勢するようになっており、禁止機構は、ヘッドレストの前方への回動又は直動を禁止するようになっていてもよい。   In the present invention, the headrest is supported so as to be pivotable or linearly movable forward on the backrest, and the moving biasing means is configured to pivot or linearly bias the headrest forward and is prohibited. The mechanism may be configured to prohibit rotation or direct movement of the headrest forward.

本発明によれば、追突された時等とそうでない時とを的確に識別して追突された時等のみにヘッドレストを確実に前方に移動させることができ、しかも、背凭れ等にコンパクトに設置できる車両用シートを提供することができる。   According to the present invention, it is possible to accurately move the headrest forward only when the rear-end collision is made by accurately identifying when the rear-end collision is not, and when it is rear-end collision, and in a compact installation on the backrest, etc. The vehicle seat which can be provided can be provided.

次に、本発明及びその実施の形態を、図に示す好ましい実施例に基づいて更に詳細に説明する。なお、本発明はこれらの実施例に何等限定されないのである。   Next, the present invention and its embodiments will be described in more detail based on preferred embodiments shown in the drawings. In addition, this invention is not limited to these Examples at all.

図１から図３において、本例の車両用シート１は、車両の床２に前後位置及び傾動位置調整自在に取付けられる座席シート３と、座席シート３に傾動位置調整自在に取付けられた車両の背凭れ４と、背凭れ４に前方に移動自在、本例では前方のＲ１方向に回動自在に支持されたヘッドレスト５と、ヘッドレスト５を前方のＲ１方向に回動付勢する回動付勢手段６と、ヘッドレスト５の前方のＲ１方向への回動を禁止する禁止機構７と、禁止機構７によるヘッドレスト５の前方のＲ１方向への移動禁止を背凭れ４に加わる車両の後方への一定以上の加速度で解除させる解除手段８とを具備している。   1 to 3, a vehicle seat 1 of this example includes a seat seat 3 that is attached to a floor 2 of a vehicle so that the front and rear positions and the tilt position can be adjusted, and a vehicle that is attached to the seat seat 3 so that the tilt position can be adjusted. The backrest 4, the headrest 5 that is movable forward in the backrest 4, and in this example, is supported so as to be rotatable in the forward R1 direction, and the rotational bias that biases the headrest 5 in the forward R1 direction. Means 6, a prohibiting mechanism 7 that prohibits the headrest 5 from rotating in the front R1 direction, and a prohibition mechanism 7 that prohibits the headrest 5 from moving in the frontward R1 direction. Release means 8 for releasing with the above acceleration is provided.

座席シート３を床２に前後位置及び傾動位置調整自在に取付ける取付機構９及び背凭れ４を座席シート３に傾動位置調整自在に取付ける取付機構１０は、公知であるので詳細な説明を省く。   Since the attachment mechanism 9 for attaching the seat 3 to the floor 2 so that the front and rear position and the tilt position can be adjusted and the attachment mechanism 10 for attaching the backrest 4 to the seat 3 so that the inclination position can be adjusted are well known, detailed description thereof will be omitted.

ヘッドレスト５は、ヘッドレスト本体１５と、ヘッドレスト本体１５に固着されていると共に背凭れ４のフレーム（図示しない）に軸１６を介してＲ１方向に回動自在に支持されている支持部材１７とを具備しており、支持部材１７は、背凭れ４のフレームに固着されたストッパ１８によりＲ１方向と反対の方向に回動しないようになっている。   The headrest 5 includes a headrest body 15 and a support member 17 that is fixed to the headrest body 15 and is supported on a frame (not shown) of the backrest 4 so as to be rotatable in the R1 direction via a shaft 16. The support member 17 is prevented from rotating in a direction opposite to the R1 direction by a stopper 18 fixed to the frame of the backrest 4.

移動付勢手段としての回動付勢手段６は、一端が背凭れ４のフレームに固着されていると共に他端が支持部材１７に固着されたコイルばね１９を具備しており、コイルばね１９の弾性力によりヘッドレスト５を常時Ｒ１方向に回動付勢している。   The rotation biasing means 6 as a movement biasing means includes a coil spring 19 having one end fixed to the frame of the backrest 4 and the other end fixed to the support member 17. The headrest 5 is always urged to rotate in the R1 direction by the elastic force.

禁止機構７は、背凭れ４のフレームに軸２１を介してＲ２方向に回動自在に支持されていると共に支持部材１７の先端に当接、係合して支持部材１７のＲ１方向の回動を禁止する鉤部材２２と、鉤部材２２を支持部材１７の先端への当接、係合位置に設定するストッパ２３及びコイルばね２４とを具備している。   The prohibition mechanism 7 is supported by the frame of the backrest 4 so as to be rotatable in the R2 direction via the shaft 21, and is brought into contact with and engaged with the tip of the support member 17 to rotate the support member 17 in the R1 direction. And a stopper 23 and a coil spring 24 for setting the flange member 22 to the abutting and engaging position of the support member 17.

解除手段８は、座席シート３に着座した乗員から背凭れ４の背受部３１に加わる荷重により変位される荷重−変位変換機構３２と、背凭れ４の背受部３１に加わる車両の後方への一定以上の加速度に基づく力を禁止機構７に伝達する一方、背凭れ４の背受部３１に加わる一定以下の加速度に基づく力の禁止機構７への伝達を行わない伝達機構３３とを有している。   The release means 8 includes a load-displacement conversion mechanism 32 that is displaced by a load applied to the back support portion 31 of the backrest 4 from the occupant seated in the seat seat 3, and a vehicle applied to the back support portion 31 of the backrest 4. A transmission mechanism 33 that transmits a force based on a certain acceleration or more to the prohibiting mechanism 7 and does not transmit a force based on an acceleration below a certain level applied to the back receiving portion 31 of the backrest 4 to the prohibiting mechanism 7. is doing.

荷重−変位変換機構３２は、背凭れ４のフレームに固着された軸３５にＲ３方向に回転自在に装着された円筒部材３６と、円筒部材３６に固着されていると共に背凭れ４の背受部３１に配された荷重受板３７とを具備しており、背凭れ４のフレームに円筒部材３６及び軸３５を介して回動自在に支持されている荷重受板３７は、背凭れ４の背受部３１におけるクッション内に埋め込まれている。   The load-displacement conversion mechanism 32 includes a cylindrical member 36 that is rotatably mounted in a direction R3 on a shaft 35 that is fixed to the frame of the backrest 4, and a back support portion of the backrest 4 that is fixed to the cylindrical member 36. The load receiving plate 37 disposed on the backrest 4 is supported by the frame of the backrest 4 through the cylindrical member 36 and the shaft 35 so as to be rotatable. It is embedded in the cushion in the receiving part 31.

伝達機構３３は、一端で円筒部材３６に固着されたアーム４１と、アーム４１の他端に取付けられたスリーブ４２と、スリーブ４２を摺動自在に貫通していると共に一端では鉤部材２２に連結されているワイヤー４３と、速度依存性の抵抗力を発生する抵抗力発生器４４と、弾性により抵抗力発生器４４を初期状態位置に設定するコイルばね４５とを具備している。   The transmission mechanism 33 includes an arm 41 fixed to the cylindrical member 36 at one end, a sleeve 42 attached to the other end of the arm 41, a sleeve 42 slidably passing through, and connected to the flange member 22 at one end. A wire 43, a resistance force generator 44 for generating a speed-dependent resistance force, and a coil spring 45 for setting the resistance force generator 44 to an initial state position by elasticity.

抵抗力発生器４４は、固定軸５０と、固定軸５０に固着されている一方の回転体としての内側部材５１と、内側部材５１に対して固定軸５０を中心として相対的にＲ４方向に回転自在な他方の回転体としてのハウジング５２と、内側部材５１及びハウジング５２の間に介在されていると共に内側部材５１に対するハウジング５２の固定軸５０を中心とした相対的なＲ４方向の回転で相補的に容積が増減する少なくとも二つ、本例では四つの空間５３、５４、５５及び５６と、空間５３、５４、５５及び５６に収容された適度な粘性を有した液体５７と、内側部材５１に対するハウジング５２の固定軸５０を中心としたＲ４方向の相対的な回転で増減する空間５３、５４、５５及び５６に対して流出入する液体５７の流速に応じた大きさの抵抗を発生する細孔５８及び５９からなるオリフィス手段６０とを具備している。   The resistance generator 44 rotates in the R4 direction relative to the fixed shaft 50, the inner member 51 as one rotating body fixed to the fixed shaft 50, and the fixed shaft 50 as a center with respect to the inner member 51. Complementary by rotation in the R4 direction relative to the inner member 51 and the housing 52 as the other rotating body, and the inner member 51 and the housing 52, relative to the inner member 51 about the fixed shaft 50 of the housing 52 The volume is increased or decreased by at least two, in this example, four spaces 53, 54, 55 and 56, a liquid 57 having an appropriate viscosity contained in the spaces 53, 54, 55 and 56, and the inner member 51. Resistance having a magnitude corresponding to the flow rate of the liquid 57 flowing into and out of the spaces 53, 54, 55, and 56 that increase or decrease with relative rotation in the R4 direction around the fixed shaft 50 of the housing 52. Are provided with an orifice means 60 consisting of the pores 58 and 59 occurs.

固定軸５０は、背凭れ４のフレームに固着されており、ワイヤー４３は、引っ張られる際には巻き戻されるように、ハウジング５２の周りに巻き付けられて他端でハウジング５２に固着されており、コイルばね４５は、一端ではハウジング５２に、他端では背凭れ４のフレームに夫々固着されてハウジング５２を囲繞して設けられている。   The fixed shaft 50 is fixed to the frame of the backrest 4, and the wire 43 is wound around the housing 52 so as to be rewound when pulled, and is fixed to the housing 52 at the other end. The coil spring 45 is fixed to the housing 52 at one end and fixed to the frame of the backrest 4 at the other end so as to surround the housing 52.

一方ではワイヤー４３、スリーブ４２及びアーム４１を介して荷重−変位変換機構３２に連結されていると共に他方ではワイヤー４３を介して禁止機構７に連結されている抵抗力発生器４４は、内側部材５１に対するハウジング５２の固定軸５０を中心としたＲ４方向の相対的な回転で液体５７が空間５３及び５４から空間５５及び５６に又はその逆に細孔５８及び５９を介して出入する際に内側部材５１に対するハウジング５２の固定軸５０を中心としたＲ４方向の相対的な回転の速度に応じて、即ち当該速度が大きい際には大きな抵抗力を当該速度が小さい際には小さな抵抗力を固定軸５０を中心とした相対的な内側部材５１に対するハウジング５２のＲ４方向の回転に対して発生するようになっている。   The resistance force generator 44 connected to the load-displacement conversion mechanism 32 via the wire 43, the sleeve 42, and the arm 41 on the one hand and connected to the prohibition mechanism 7 via the wire 43 on the other hand is the inner member 51. When the liquid 57 enters and exits from the spaces 53 and 54 to the spaces 55 and 56 or vice versa through the pores 58 and 59 by relative rotation in the R4 direction around the fixed shaft 50 of the housing 52 with respect to the inner member 51 according to the relative rotation speed in the R4 direction around the fixed shaft 50 of the housing 52 with respect to 51, that is, when the speed is large, a large resistance force is applied, and when the speed is small, a small resistance force is applied to the fixed shaft. The rotation occurs in the R4 direction of the housing 52 relative to the inner member 51 relative to the center 50.

以上の車両用シート１では、座席シート３への乗員の着座で背凭れ４に車両の後方への乗員の通常の荷重が付加される場合又は座席シート３に着座した乗員への車両の通常の加速による背凭れ４への車両の後方への乗員の荷重の追加の場合においては、背凭れ４へのこれらの荷重は緩慢になされる結果、乗員の斯かる荷重を受ける荷重受板３７は、軸３５を中心としてＲ３方向において時計回りに緩慢に回動される。荷重受板３７のこの緩慢な回動でアーム４１が同じくＲ３方向において図１において時計回りに緩慢に回動されてアーム４１の先端にスリーブ４２を介して係合されたワイヤー４３に撓みが生じると、ワイヤー４３の他端を介してハウジング５２が固定軸５０を中心として内側部材５１に対してＲ４方向において図１において反時計回りに回転されようとする。この回転は、細孔５８及び５９を介して液体５７の空間５３及び５４から空間５５及び５６へのゆっくりとした流動を生じさせる結果、大きな抵抗力を生じさせないで行われ、而して、支持部材１７の先端への当接、係合を解除するような鉤部材２２のＲ２方向において図１において時計回りの回動を生じさせる引張力がワイヤー４３に生じなく、禁止機構７はヘッドレスト５の前方のＲ１方向の回動を禁止し、ヘッドレスト５は通常の位置に維持される。   In the vehicle seat 1 described above, when a passenger's normal load is applied to the backrest 4 when the occupant is seated on the seat seat 3, or when the occupant is seated on the seat seat 3 In the case of the addition of the occupant's load behind the vehicle to the backrest 4 due to acceleration, these loads on the backrest 4 are slowed down so that the load receiving plate 37 that receives such a load of the occupant is: It is slowly rotated clockwise in the R3 direction around the shaft 35. Due to this slow rotation of the load receiving plate 37, the arm 41 is also slowly rotated clockwise in FIG. 1 in the R3 direction, and the wire 43 engaged with the tip of the arm 41 via the sleeve 42 is bent. Then, the housing 52 tends to rotate counterclockwise in FIG. 1 in the R4 direction with respect to the inner member 51 around the fixed shaft 50 via the other end of the wire 43. This rotation is performed without creating a large drag force as a result of the slow flow of the liquid 57 through the pores 58 and 59 from the spaces 53 and 54 to the spaces 55 and 56, and thus the support. The pulling force that causes clockwise rotation in FIG. 1 in the R2 direction of the flange member 22 that releases the contact and engagement with the tip of the member 17 does not occur in the wire 43, and the prohibiting mechanism 7 The headrest 5 is maintained at a normal position by prohibiting forward rotation in the R1 direction.

また車両用シート１では、追突されて座席シート３に着座した乗員へ後方への大きな加速度が生じて、荷重受板３７が急激に軸３５を中心としてＲ３方向において図１において時計回りに回動されると、ワイヤー４３に急速な撓みが生じ、ワイヤー４３の他端を介してハウジング５２が固定軸５０を中心として内側部材５１に対して高速でＲ４方向において図１において反時計回りに回転されようとする。この回転は、液体５７の空間５３及び５４から空間５５及び５６への急速な流動を生じさせる結果、大きな抵抗力を生じさせて、ハウジング５２と内側部材５１とが互いに剛体連結されたようになり、而して、図４に示すように、支持部材１７の先端への当接、係合を解除するような鉤部材２２の回動を生じさせる引張力がワイヤー４３に生じ、禁止機構７の鉤部材２２は、支持部材１７の先端への当接、係合を解除するように軸２１を中心としてＲ２方向において図１において時計回りに回動され、ヘッドレスト５は、コイルばね１９に付勢されて乗員の頭部を保持するようにＲ１方向に回動される。   Further, in the vehicle seat 1, a large rearward acceleration is generated in the passenger seated in the rear seat and seated on the seat seat 3, and the load receiving plate 37 suddenly rotates clockwise in FIG. 1 about the shaft 35 in the R3 direction. Then, the wire 43 is rapidly bent, and the housing 52 is rotated counterclockwise in FIG. 1 in the R4 direction at a high speed with respect to the inner member 51 around the fixed shaft 50 through the other end of the wire 43. Try to. This rotation causes a rapid flow of the liquid 57 from the spaces 53 and 54 to the spaces 55 and 56. As a result, a large resistance is generated, so that the housing 52 and the inner member 51 are rigidly connected to each other. Thus, as shown in FIG. 4, a pulling force is generated on the wire 43 that causes the hook member 22 to rotate so as to abut and disengage the support member 17. The collar member 22 is rotated clockwise in FIG. 1 in the R2 direction around the shaft 21 so as to release the contact and engagement with the tip of the support member 17, and the headrest 5 is urged against the coil spring 19. And rotated in the R1 direction so as to hold the head of the passenger.

このように車両用シート１では、禁止機構７によるヘッドレスト５の前方のＲ１方向への回動禁止を背凭れ４に加わる車両の後方への一定以上の加速度で解除させる解除手段８が背凭れ４に加わる車両の後方への一定以上の加速度に基づく力を禁止機構７に伝達する一方、背凭れ４に加わる一定以下の車両の後方への加速度に基づく力の禁止機構７への伝達を行わない伝達機構３３を有しているので、追突された時等とそうでない時とを的確に識別して追突された時等のみに確実にヘッドレスト５を前方のＲ１方向に移動させることができる。   As described above, in the vehicle seat 1, the release means 8 that releases the prohibition of the rotation of the headrest 5 in the R1 direction in front of the headrest 5 by the prohibition mechanism 7 with a certain acceleration beyond the back of the vehicle applied to the backrest 4. The force based on the acceleration beyond a certain amount applied to the rear of the vehicle applied to the vehicle is transmitted to the prohibiting mechanism 7, while the force based on the acceleration below the certain amount applied to the backrest 4 is not transmitted to the prohibiting mechanism 7. Since the transmission mechanism 33 is provided, the headrest 5 can be reliably moved in the forward R1 direction only when the rear-end collision is made by accurately identifying when the rear-end collision occurs and when it is not.

抵抗力発生器４４として回転型のものを用いたが、これに代えて、図５及び図６に示すように直動型のものを用いてもよい。図５及び図６に示す抵抗力発生器４４は、一方の直動体としてのシリンダ６１と、シリンダ６１に対して相対的に直動自在な他方の直動体としてのピストン６２と、シリンダ６１及びピストン６２の間に介在されていると共にシリンダ６１に対するピストン６２の相対的な直動で相補的に容積が増減する二つの空間６３及び６４と、二つの空間６３及び６４に収容された粘性の液体５７と、シリンダ６１に対するピストン６２の相対的な直動で増減する二つの空間６３及び６４に対して流出入する液体５７の流速に応じた大きさの抵抗力を発生する貫通細孔６５からなるオリフィス手段６６と、一端ではピストン６２に、他端ではワイヤー４３の一端に夫々連結されたピストンロッド６７と、ピストンロッド６７のシリンダ６１内への出入における体積分を補正する空気室６８をシリンダ６１との間で形成するべく、シリンダ６１内に直動自在に配されたフリーピストン６９とを具備している。   Although a rotary type was used as the resistance generator 44, a direct acting type may be used instead, as shown in FIGS. The resistance force generator 44 shown in FIGS. 5 and 6 includes a cylinder 61 as one linear moving body, a piston 62 as the other linear moving body that is relatively movable relative to the cylinder 61, and the cylinder 61 and the piston. Two spaces 63 and 64 which are interposed between 62 and whose volumes increase and decrease complementarily by the relative linear motion of the piston 62 with respect to the cylinder 61, and a viscous liquid 57 accommodated in the two spaces 63 and 64 And an orifice composed of a through-hole 65 that generates a resistance force having a magnitude corresponding to the flow velocity of the liquid 57 flowing into and out of the two spaces 63 and 64 that increase and decrease by the relative linear movement of the piston 62 with respect to the cylinder 61. Means 66, a piston rod 67 connected to the piston 62 at one end and one end of the wire 43 at the other end, and the piston rod 67 to enter and exit the cylinder 61 To the air chamber 68 to correct the kick volume fraction is formed between the cylinder 61, and a free piston 69 linearly movable in arranged in the cylinder 61.

図５及び図６に示す抵抗力発生器４４を用いる場合には、ワイヤー４３の他端は、背凭れ４のフレームに固着されており、シリンダ６１は、他のワイヤー７５を介して鉤部材２２に連結されており、抵抗力発生器４４を初期状態に設定するコイルばね４５は、シリンダ６１内においてピストンロッド６７を囲繞してシリンダ６１とピストン６２との間に配されている。   When the resistance force generator 44 shown in FIGS. 5 and 6 is used, the other end of the wire 43 is fixed to the frame of the backrest 4, and the cylinder 61 is connected to the saddle member 22 via another wire 75. The coil spring 45 that is connected to the cylinder and sets the resistance generator 44 in the initial state surrounds the piston rod 67 in the cylinder 61 and is disposed between the cylinder 61 and the piston 62.

図５及び図６に示す抵抗力発生器４４を用いた車両用シート１では、座席シート３への乗員の着座で背凭れ４に車両の後方への乗員の通常の荷重が付加される場合又は座席シート３に着座した乗員への車両の通常の加速による背凭れ４への車両の後方への乗員の荷重の追加の場合においては、背凭れ４へのこれらの荷重は緩慢になされる結果、乗員の斯かる荷重を受ける荷重受板３７は、軸３５を中心として緩慢に回動される。荷重受板３７のこの緩慢な回動でアーム４１が同じく緩慢に回動されてアーム４１の先端にスリーブ４２を介して係合されたワイヤー４３に撓みが生じると、ワイヤー４３の一端及びピストンロッド６７を介してピストン６２がシリンダ６１に対して直動されようとする。この直動は、貫通細孔６５を介して空間６３から空間６４へのゆっくりとした液体５７の流動を生じさせる結果、大きな抵抗力を生じさせないで行われ、而して、支持部材１７の先端への当接、係合を解除するような鉤部材２２の回動を生じさせる引張力がワイヤー４３に生じなく、禁止機構７はヘッドレスト５の前方のＲ１方向の回動を禁止し、ヘッドレスト５は、通常の位置に維持される。   In the vehicle seat 1 using the resistance force generator 44 shown in FIG. 5 and FIG. 6, when a passenger's normal load to the back of the vehicle is applied to the backrest 4 when the passenger sits on the seat seat 3 or In the case of the addition of the occupant's load to the backrest 4 due to the normal acceleration of the vehicle to the occupant seated in the seat 3, these loads on the backrest 4 are made slow, The load receiving plate 37 that receives such a load of the occupant is slowly rotated about the shaft 35. When the arm 41 is also slowly rotated by this slow rotation of the load receiving plate 37 and the wire 43 engaged with the tip of the arm 41 via the sleeve 42 is bent, one end of the wire 43 and the piston rod The piston 62 tends to be moved directly with respect to the cylinder 61 via 67. This linear movement is performed without causing a large resistance force as a result of the slow flow of the liquid 57 from the space 63 to the space 64 through the through-hole 65, and thus the tip of the support member 17. A pulling force that causes rotation of the eaves member 22 to release contact and engagement with the wire 43 is not generated in the wire 43, and the prohibiting mechanism 7 prohibits rotation in the R <b> 1 direction in front of the headrest 5. Is maintained in its normal position.

また図５及び図６に示す車両用シート１では、追突されて座席シート３に着座した乗員へ後方への大きな加速度が生じて、荷重受板３７が急激に軸３５を中心として回動されると、ワイヤー４３に急速な撓みが生じ、ワイヤー４３の一端及びピストンロッド６７を介してピストン６２がシリンダ６１に対して高速で直動されようとする。この直動は、液体５７の空間６３から空間６４への急速な流動を生じさせる結果、大きな抵抗力を生じさせて、ピストン６２とシリンダ６１とが互いに剛体連結されたようになり、而して、支持部材１７の先端への当接、係合を解除するような鉤部材２２の回動を生じさせる引張力がワイヤー４３に生じ、禁止機構７の鉤部材２２は、支持部材１７の先端への当接、係合を解除するように軸２１を中心として回動され、ヘッドレスト５は、乗員の頭部を保持するようにＲ１方向に回動され、斯かる車両用シート１でも、禁止機構７によるヘッドレスト５の前方のＲ１方向への回動禁止を背凭れ４に加わる一定以上の加速度で解除させる解除手段８が背凭れ４に加わる車両の後方への一定以上の加速度に基づく力を禁止機構７に伝達する一方、背凭れ４に加わる一定以下の車両の後方への加速度に基づく力の禁止機構７への伝達を行わない伝達機構３３を有しているので、追突された時等とそうでない時とを的確に識別して追突された時等のみに確実にヘッドレスト５を前方のＲ１方向に移動させることができる。   Further, in the vehicle seat 1 shown in FIGS. 5 and 6, a large rearward acceleration is generated in the occupant seated on the seat seat 3 after the rear-end collision, and the load receiving plate 37 is rapidly rotated about the shaft 35. Then, rapid bending occurs in the wire 43, and the piston 62 tends to be linearly moved with respect to the cylinder 61 through one end of the wire 43 and the piston rod 67 at a high speed. This direct movement causes a rapid flow of the liquid 57 from the space 63 to the space 64, and as a result, a large resistance force is generated so that the piston 62 and the cylinder 61 are rigidly connected to each other. Then, the pulling force that causes the pivot of the collar member 22 to release the contact and engagement with the tip of the support member 17 is generated in the wire 43, and the collar member 22 of the prohibiting mechanism 7 moves to the tip of the support member 17. The headrest 5 is rotated in the R1 direction so as to hold the head of the occupant so as to release the contact and engagement of the vehicle. The release means 8 that releases the prohibition of the rotation of the headrest 5 in the R1 direction forward by 7 at a predetermined acceleration applied to the backrest 4 prohibits a force based on a predetermined acceleration beyond the vehicle applied to the backrest 4. While transmitting to mechanism 7, Since it has a transmission mechanism 33 that does not transmit force to the prohibition mechanism 7 based on the rearward acceleration of the vehicle that is applied to the droop 4 below a certain level, it accurately discriminates between when it is impacted and when it is not Thus, the headrest 5 can be reliably moved in the forward R1 direction only when the rear-end collision occurs.

図５及び図６に示す抵抗力発生器４４では、シリンダ６１を他のワイヤー７５を介して鉤部材２２に連結したが、これに代えて、シリンダ６１を直接に鉤部材２２に回動自在に連結してもよく、他のワイヤー７５をスリーブ４２に挿通する一方、ピストンロッド６７を背凭れ４のフレームに回動自在に連結してもよい。   In the resistance generator 44 shown in FIGS. 5 and 6, the cylinder 61 is connected to the flange member 22 via another wire 75, but instead, the cylinder 61 can be directly rotated to the flange member 22. Alternatively, the other wire 75 may be inserted into the sleeve 42 while the piston rod 67 may be pivotally connected to the frame of the backrest 4.

上記の車両用シート１のいずれの例でも、ヘッドレスト５の前方のＲ１方向への移動後、ヘッドレスト５を強制的にＲ１方向と逆の方向に回動させ、支持部材１７の先端を鉤部材２２の傾斜案内面８１に摺動させて鉤部材２２を逆転させることにより、支持部材１７の先端の鉤部材２２への当接、係合を復帰させることができる。なお、前記の例では、ワイヤー４３及び／又は７５を用いたが、これに代えて、歯車機構、ラック−ピニオン機構等を用いてもよい。   In any example of the vehicle seat 1 described above, after the headrest 5 is moved in the forward R1 direction, the headrest 5 is forcibly rotated in a direction opposite to the R1 direction, and the tip of the support member 17 is moved to the flange member 22. By sliding the heel member 22 in the reverse direction by sliding it on the inclined guide surface 81, the contact and engagement of the tip of the support member 17 with the heel member 22 can be restored. In the above example, the wires 43 and / or 75 are used, but a gear mechanism, a rack-pinion mechanism, or the like may be used instead.

本発明による実施の形態の好ましい例の側面断面説明図である。It is side surface sectional explanatory drawing of the preferable example of embodiment by this invention. 図１に示す例の正面断面説明図である。It is front sectional explanatory drawing of the example shown in FIG. 図１に示す抵抗力発生器の断面説明図であって、（ａ）は、（ｂ）に示すａ−ａ線矢視断面図、（ｂ）は（ａ）に示すｂ−ｂ線矢視断面説明図である。It is a cross-sectional explanatory view of the resistance generator shown in FIG. 1, (a) is a cross-sectional view taken along line aa shown in (b), (b) is a cross-sectional view taken along line bb shown in (a). FIG. 図１に示す例の動作説明図である。It is operation | movement explanatory drawing of the example shown in FIG. 本発明による実施の形態の好ましい例の側面断面説明図である。It is side surface sectional explanatory drawing of the preferable example of embodiment by this invention. 図５に示す抵抗力発生器の断面説明図である。FIG. 6 is a cross-sectional explanatory view of the resistance force generator shown in FIG. 5.

符号の説明Explanation of symbols

１ 車両用シート
２ 床
３ 座席シート
４ 背凭れ
５ ヘッドレスト
６ 回動付勢手段
７ 禁止機構
８ 解除手段
３３ 伝達機構 DESCRIPTION OF SYMBOLS 1 Vehicle seat 2 Floor 3 Seat seat 4 Backrest 5 Headrest 6 Rotating biasing means 7 Prohibition mechanism 8 Release means 33 Transmission mechanism

Claims (5)

車両の背凭れと、この背凭れに車両の前方に移動自在に支持されたヘッドレストと、このヘッドレストを前方に移動付勢する移動付勢手段と、ヘッドレストの前方への移動を禁止する禁止機構と、この禁止機構によるヘッドレストの前方への移動禁止を背凭れに加わる車両の後方への一定以上の加速度で解除させる解除手段とを具備しており、解除手段は、背凭れに加わる車両の後方への一定以上の加速度に基づく力を禁止機構に伝達する伝達機構と、背凭れの背受部に加わる荷重により変位される荷重−変位変換機構とを有しており、伝達機構は、速度依存性の抵抗力を発生する抵抗力発生器を有しており、抵抗力発生器は、一方では荷重−変位変換機構に連結されていると共に他方では禁止機構に連結されている車両用シート。 A backrest of the vehicle, a headrest supported by the backrest so as to be movable forward of the vehicle, a moving urging means for urging the headrest to move forward, and a prohibiting mechanism for prohibiting the headrest from moving forward And a release means for releasing the prohibition of forward movement of the headrest by this prohibiting mechanism with a certain acceleration beyond the back of the vehicle applied to the backrest, the release means to the back of the vehicle applied to the backrest The transmission mechanism transmits a force based on an acceleration exceeding a certain level to the prohibition mechanism, and a load-displacement conversion mechanism that is displaced by a load applied to the backrest portion of the backrest. A resistance force generator that generates a resistance force of the vehicle, and the resistance force generator is connected to a load-displacement conversion mechanism on the one hand and to a prohibition mechanism on the other hand . 荷重−変位変換機構は、背凭れのフレームに回動自在に支持されていると共に背凭れの背受部に配された荷重受板を具備している請求項１に記載の車両用シート。2. The vehicle seat according to claim 1, wherein the load-displacement conversion mechanism includes a load receiving plate that is rotatably supported by the backrest frame and that is disposed on a backrest portion of the backrest. 抵抗力発生器は、一方の回転体と、この一方の回転体に対して相対的に回転自在な他方の回転体と、両回転体の間に介在されていると共に一方の回転体に対する他方の回転体の相対的な回転で相補的に容積が増減する少なくとも二つの空間と、この少なくとも二つの空間に収容された液体と、一方の回転体に対する他方の回転体の相対的な回転で増減する少なくとも二つの空間に対して流出入する液体の流速に応じた大きさの抵抗力を発生するオリフィス手段とを具備している請求項１又は２に記載の車両用シート。The resistance force generator includes one rotating body, the other rotating body rotatable relative to the one rotating body, and the other rotating body interposed between the rotating bodies and the other rotating body. At least two spaces whose volumes increase or decrease complementarily by the relative rotation of the rotating body, the liquid contained in the at least two spaces, and the relative rotation of the other rotating body with respect to one rotating body increase or decrease The vehicle seat according to claim 1 or 2, further comprising orifice means for generating a resistance force having a magnitude corresponding to a flow velocity of the liquid flowing into and out of at least two spaces. 抵抗力発生器は、一方の直動体と、この一方の直動体に対して相対的に直動自在な他方の直動体と、両直動体の間に介在されていると共に一方の直動体に対する他方の直動体の相対的な直動で相補的に容積が増減する少なくとも二つの空間と、この少なくとも二つの空間に収容された液体と、一方の直動体に対する他方の直動体の相対的な直動で増減する少なくとも二つの空間に対して流出入する液体の流速に応じた大きさの抵抗力を発生するオリフィス手段とを具備している請求項１から３のいずれか一項に記載の車両用シート。The resistance force generator includes one linear moving body, the other linear moving body relatively movable relative to the one linear moving body, and the other linear moving body interposed between the two linear moving bodies and the other linear moving body. The at least two spaces whose volumes increase and decrease complementarily by the relative linear motion of the linear motion body, the liquid contained in the at least two spaces, and the relative linear motion of the other linear motion body with respect to one of the linear motion bodies 4. The vehicle according to claim 1, further comprising an orifice unit that generates a resistance force having a magnitude corresponding to a flow rate of the liquid flowing into and out of at least two spaces that increase and decrease in step. Sheet. ヘッドレストは、背凭れに前方に回動又は直動自在に支持されており、移動付勢手段は、ヘッドレストを前方に回動又は直動付勢するようになっており、禁止機構は、ヘッドレストの前方への回動又は直動を禁止するようになっている請求項１から４のいずれか一項に記載の車両用シート。The headrest is supported so as to be pivotable or linearly movable forward on the backrest, and the moving urging means is configured to rotate or linearly urge the headrest forward. The vehicle seat according to any one of claims 1 to 4, wherein forward rotation or direct movement is prohibited.
JP2006118761A 2006-04-24 2006-04-24 Vehicle seat Active JP4940744B2 (en)

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PCT/JP2007/000434 WO2007129455A1 (en) 2006-04-24 2007-04-20 Vehicle seat

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JP4976743B2 (en) * 2006-05-22 2012-07-18 株式会社イノアックコーポレーション Seat back pad for vehicle seat
JP5175738B2 (en) * 2006-10-20 2013-04-03 オイレス工業株式会社 Damper and vehicle seat
JP5163644B2 (en) * 2007-06-27 2013-03-13 トヨタ紡織株式会社 Clutch mechanism
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JP4952643B2 (en) * 2008-04-15 2012-06-13 オイレス工業株式会社 Damper and vehicle seat equipped with the damper
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KR101475208B1 (en) * 2013-01-25 2014-12-23 삼성중공업 주식회사 Trolly apparatus

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