JP4863362B2 - Vehicle seat - Google Patents

Vehicle seat Download PDF

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JP4863362B2
JP4863362B2 JP2006124541A JP2006124541A JP4863362B2 JP 4863362 B2 JP4863362 B2 JP 4863362B2 JP 2006124541 A JP2006124541 A JP 2006124541A JP 2006124541 A JP2006124541 A JP 2006124541A JP 4863362 B2 JP4863362 B2 JP 4863362B2
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plate
adjusting plate
elasticity adjusting
elasticity
plate body
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JP2007295997A (en
JP2007295997A5 (en
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武志 阿久津
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TS Tech Co Ltd
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TS Tech Co Ltd
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Priority to JP2006124541A priority Critical patent/JP4863362B2/en
Priority to EP07742705.2A priority patent/EP2016867B1/en
Priority to PCT/JP2007/059270 priority patent/WO2007126089A1/en
Priority to US12/298,760 priority patent/US8235467B2/en
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Description

本発明は、車両用シートを提供するものであり、特に、背凭シートのクッション材の支持構成に付いて工夫したものである。   The present invention provides a vehicle seat, and is particularly devised for the support structure of the cushion material of the backrest seat.

従来、背凭シートの背凭フレームに、着座者の背部を支持しうる合成樹脂製の一枚板形状のプレート体を、ワイヤスプリングを介して前記背凭フレームに対して前後移動自在に取付けた構成は、公知である（例えば、特許文献１）。
また、従来、背凭シートのフレームに四角枠形状の内部構造体を固定し、該内部構造体の左右側には横弾性屈曲部を設け、弾性屈曲部の間にはスプリング板部を設け、スプリング板部の上下側には縦弾性屈曲部を介してランバーサポート部を設けた構成は公知である（例えば、特許文献２）。
また、公知ではないが、先願の特願２００４−３１３６２３号には、プレート体に前後する一枚板状の弾力調節プレートを設けた構成が提案されている。
特開２００６−２１６１６号公報 特開平１１−２０６５０６号公報 Conventionally, a single-plate plate made of synthetic resin capable of supporting the back of a seated person is attached to the dorsal frame of the dorsal seat so as to be movable back and forth with respect to the dorsal frame via a wire spring. The configuration is known (for example, Patent Document 1).
Conventionally, a square frame-shaped internal structure is fixed to the frame of the dorsal seat, a lateral elastic bending portion is provided on the left and right sides of the internal structure, and a spring plate portion is provided between the elastic bending portions, A configuration in which a lumbar support portion is provided on the upper and lower sides of the spring plate portion via a longitudinal elastic bending portion is known (for example, Patent Document 2).
Moreover, although not publicly known, Japanese Patent Application No. 2004-313623 of the prior application proposes a configuration in which a single plate-like elasticity adjusting plate is provided in front of and behind the plate body.
JP 2006-21616 A JP-A-11-206506

前記公知例のうち前者は、着座者の支持は良好になるが、着座者の体形等に合わせて弾力を調節することができないという課題がある。
前記公知例のうち後者は、内部構造体の四周は剛体であり、この部分のクッション性は低下するという課題がある。
即ち、四角枠形状の背凭フレームに、更に、四角枠形状の内部構造体を設ける構成のため、中央のランバーサポート部以外のクッション性は低下する。
また、前記先願は、弾力調節プレートを所定位置で湾曲させる薄肉部の位置が上下するという課題がある。
即ち、先願は、図２２のように、弾力調節プレートの上縁を上下させて薄肉部Ｐを前後させる構成のため、薄肉部Ｐは弾力調節プレートの下縁を支点に「Ｐ’」との間前後し、そのため、薄肉部Ｐと薄肉部Ｐ’の位置が大きく上下することが判明した。
本願は、荷重を「面」で安定した状態で支持しつつ、着座者の体格や好みに応じてクッション性の弾力を調節可能とし、また、着座者の腰部を良好に支持して、着座フィーリングを向上するように工夫したものである。 Among the known examples, the former is well supported by the seated person, but has a problem that the elasticity cannot be adjusted in accordance with the body shape of the seated person.
Among the known examples, the latter has a problem that the four rounds of the internal structure are rigid, and the cushioning property of this portion is lowered.
In other words, because the square frame-shaped dorsal frame is further provided with a square frame-shaped internal structure, cushioning properties other than the central lumbar support portion are reduced.
Further, the prior application has a problem that the position of the thin portion that causes the elasticity adjusting plate to bend at a predetermined position moves up and down.
That is, as shown in FIG. 22, the prior application has a configuration in which the upper portion of the elasticity adjusting plate is moved up and down to move the thin portion P back and forth. Therefore, it was found that the positions of the thin portion P and the thin portion P ′ fluctuate greatly.
The present application supports the load in a stable state on the "surface", allows the cushioning elasticity to be adjusted according to the physique and preference of the seated person, and also supports the seated person's waist well, It is devised to improve the ring.

本発明は、背凭シート２の背凭フレーム３に、着座者の背部を支持しうる合成樹脂製の一枚板形状のプレート体３１を、ワイヤスプリング３２を介して前記背凭フレーム３に対して前後移動自在に取付け、前記プレート体３１には、該プレート体３１に対して前後するように弾性を有する一枚板状の弾力調節プレート４０を設け、前記弾力調節プレート４０の所定部分は該弾力調節プレート４０の上縁側と下縁側との間隔を、下縁側を上動させて狭くしたとき前方に突き出る押出面部７０に形成し、該押出面部７０付近の弾力調節プレート４０を前後移動させて該弾力調節プレート４０の着座者の身体の支持弾力を調節しうるように構成し、前記押出面部７０の位置は、弾力調節プレート４０の上縁側と下縁側との上下略中間より下方に位置するように構成した車両用シートとしたものである。
本発明は、前記押出面部７０と弾力調節プレート４０の上縁との間隔Ｋよりも押出面部７０と弾力調節プレート４０の下縁との間隔Ｌの方が短くなるように構成した車両用シートとしたものである。
本発明は、前記弾力調節プレート４０は、その上部をプレート体３１に位置固定状態に、その下部の下部係合部５５をプレート体３１に上下自在に取付けて、前記下部係合部５５を上動させて押出面部７０を前方移動させるように構成した車両用シートとしたものである。
本発明は、前記押出面部７０は、溝またはスリット７１や、他の弾力調節プレート４０の部分に比し若干肉厚を薄くした薄肉部７２や、孔７３の内の何れか一つあるいは複数を組合せて構成した車両用シートとしたものである。
本発明は、前記押出面部７０は、前記弾力調節プレート４０の外縁所定部分を切り欠いた切欠部７４により弾力調節プレート４０の上縁側と下縁側との間隔を狭くしたとき前方に突き出るように構成した車両用シートとしたものである。 In the present invention, a single plate-shaped plate body 31 made of synthetic resin capable of supporting the back of a seated person is attached to the dorsal frame 3 of the dorsal seat 2 with respect to the dorsal frame 3 via a wire spring 32. The plate body 31 is provided with a single plate-like elasticity adjusting plate 40 having elasticity so as to move back and forth with respect to the plate body 31, and a predetermined portion of the elasticity adjusting plate 40 is provided on the plate body 31. An interval between the upper edge side and the lower edge side of the elasticity adjusting plate 40 is formed on the extruded surface portion 70 that protrudes forward when the lower edge side is moved upward to make it narrow, and the elasticity adjusting plate 40 in the vicinity of the extruded surface portion 70 is moved back and forth. The elasticity adjusting plate 40 is configured to be able to adjust the support elasticity of the body of the seated person, and the position of the push-out surface portion 70 is located below a substantially middle part between the upper edge side and the lower edge side of the elasticity adjusting plate 40. It is obtained by a vehicle seat configured to so that.
The present invention relates to a vehicle seat configured such that a distance L between the extruded surface portion 70 and the lower edge of the elasticity adjusting plate 40 is shorter than a distance K between the extruded surface portion 70 and the upper edge of the elasticity adjusting plate 40. It is a thing.
In the present invention, the elasticity adjusting plate 40 has its upper portion fixed to the plate body 31 and its lower engaging portion 55 attached vertically to the plate body 31 so that the lower engaging portion 55 can be moved upward. The vehicle seat is configured to be moved to move the extrusion surface portion 70 forward.
According to the present invention, the extrusion surface portion 70 includes any one or a plurality of the grooves or slits 71, the thin-walled portion 72 that is slightly thinner than the portions of the other elasticity adjusting plates 40, and the holes 73. This is a vehicle seat configured in combination.
According to the present invention, the push-out surface portion 70 is configured to protrude forward when the interval between the upper edge side and the lower edge side of the elasticity adjusting plate 40 is narrowed by a notch 74 obtained by notching a predetermined portion of the outer edge of the elasticity adjusting plate 40. This is a vehicle seat.

請求項１の発明では、着座者の体格や好みに応じてクッション材４の前方に押出す弾力を調節可能としながら、調節する際の押出面部７０の上下位置の変動を最小限にして、着座者の腰部を良好に支持でき、着座フィーリングを向上させることができる。
請求項２の発明では、押出面部７０が前後移動するときの移動半径を可及的に長くして調節する際の押出面部７０の上下位置の変動を最小限にして、着座者の腰部を良好に支持でき、着座フィーリングを向上させることができる。
請求項３の発明では、弾力調節プレート４０の下部係合部５５を上動させて押出面部７０を前方移動させるので、一層、押出面部７０の上下位置の変動を減少させて、着座者の腰部を良好に支持でき、着座フィーリングを向上させることができる。
請求項４の発明では、押出面部７０を簡単に構成することができ、製造コストを低くすることができる。
請求項５の発明では、押出面部７０を簡単に構成することができ、製造コストを低くすることができる。 According to the first aspect of the present invention, it is possible to adjust the elastic force pushed forward of the cushion material 4 according to the physique and preference of the seated person, while minimizing the fluctuation of the vertical position of the pushing surface portion 70 during the adjustment. The user's waist can be supported well, and the sitting feeling can be improved.
In the invention of claim 2, the waist of the seated person is improved by minimizing the fluctuation of the vertical position of the extruded surface portion 70 when adjusting the moving radius when the extruded surface portion 70 moves back and forth as much as possible. The seating feeling can be improved.
In the third aspect of the invention, the lower engaging portion 55 of the elasticity adjusting plate 40 is moved upward to move the push-out surface portion 70 forward, so that the fluctuation of the vertical position of the push-out surface portion 70 is further reduced, and the waist of the seated person Can be satisfactorily supported, and the sitting feeling can be improved.
In invention of Claim 4, the extrusion surface part 70 can be comprised easily and a manufacturing cost can be made low.
In invention of Claim 5, the extrusion surface part 70 can be comprised easily and a manufacturing cost can be made low.

本発明の実施例を図面により説明すると、１は車両用シート、２は車両用シート１の背凭シートであり、該背凭シート２は背凭フレーム３にクッション材４を取付け、クッション材４の外周は表皮部材５により包囲して構成している（図１）。
背凭シート２の上部にはヘッドレスト６を設ける。ヘッドレスト６の構成は任意であり、ヘッドレスト６は少なくとも着座者の頭部を支持する頭部支持部７と、前記背凭シート２に装着するためピラー８とを設けて構成している。
ヘッドレスト６のピラー８は左右方向のヘッドレスト取付杆１０に設けたピラー支持部材１１に高さ調節自在に取付ける。ピラー８とピラー支持部材１１の構成は公知であり、図示は省略するが、ピラー支持部材１１に設けた係合部材を所望高さに位置させたピラー８に形成した係合凹部に選択的に係合させて保持すればよい。 An embodiment of the present invention will be described with reference to the drawings. Reference numeral 1 denotes a vehicle seat, 2 denotes a back seat of the vehicle seat 1, and the back seat 2 attaches a cushion material 4 to a back frame 3, and the cushion material 4 The outer periphery is surrounded by a skin member 5 (FIG. 1).
A headrest 6 is provided on the upper portion of the dorsal seat 2. The configuration of the headrest 6 is arbitrary, and the headrest 6 is configured by providing at least a head support portion 7 for supporting the head of the seated person and a pillar 8 for mounting on the dorsal seat 2.
The pillar 8 of the headrest 6 is attached to a pillar support member 11 provided on the headrest attachment rod 10 in the left-right direction so that the height can be adjusted. Although the structure of the pillar 8 and the pillar support member 11 is well-known and illustration is abbreviate | omitted, it selectively selects to the engagement recessed part formed in the pillar 8 which located the engagement member provided in the pillar support member 11 in desired height. What is necessary is just to engage and hold | maintain.

前記ヘッドレスト取付杆１０の左右両側は、前記ヘッドレスト６を前後に移動させる上側リンク杆１５の上部に固定する。上側リンク杆１５の上下中間部は回動軸１６により背凭フレーム３の側部フレーム１７に回動自在に取付ける。上側リンク杆１５の下部には、伝動部材（ロッド）２０の上部を軸２１により取付ける。
この場合、上側リンク杆１５は、回動軸１６より上側を上リンクアーム部２２に形成し、回動軸１６より下側を下リンクアーム部２３に形成し、上リンクアーム部２２と下リンクアーム部２３は逆「く」の字形状に形成し、下リンクアーム部２３よりも上リンクアーム部２２を長く形成する。また、上側リンク杆１５は、下リンクアーム部２３が回動軸１６を基準に下方に至るに従い前側に位置するように、傾斜させて取付ける。 The left and right sides of the headrest mounting rod 10 are fixed to the upper portion of the upper link rod 15 that moves the headrest 6 back and forth. An upper and lower intermediate portion of the upper link rod 15 is rotatably attached to a side frame 17 of the back frame 3 by a rotation shaft 16. The upper part of the transmission member (rod) 20 is attached to the lower part of the upper link rod 15 by the shaft 21.
In this case, the upper link rod 15 is formed on the upper link arm portion 22 on the upper side of the rotation shaft 16, and is formed on the lower link arm portion 23 on the lower side of the rotation shaft 16. The arm portion 23 is formed in an inverted “<” shape, and the upper link arm portion 22 is formed longer than the lower link arm portion 23. Further, the upper link rod 15 is attached so as to be inclined so that the lower link arm portion 23 is positioned on the front side as it goes downward with respect to the rotation shaft 16.

しかして、背凭フレーム３には、後方から衝突された着座者の後方移動により後方移動する後突感知体２５を設ける。後突感知体２５は、その両側を前記背凭フレーム３に設けた一対の下側リンク２６の下部に取付軸２７により取付ける。下側リンク２６の上部は背凭フレーム３の側部フレーム１７に回動軸２８により回動自在に取付ける。下側リンク２６の上下中間部には前記伝動部材２０の下部を軸２９により取付ける。
着座者の後方移動により後突感知体２５が後方移動すると、このエネルギーが下側リンク２６と伝動部材２０を介して上側リンク杆１５に伝達され、上側リンク杆１５は伝達された着座者の後方移動エネルギーによりヘッドレスト６を前方移動させ、着座者の頭部を支持する。 Thus, the back collision frame 3 is provided with a rear collision detector 25 that moves backward due to the backward movement of the seated person collided from behind. The rear collision detector 25 is attached to the lower part of a pair of lower links 26 provided on the dorsal frame 3 by attachment shafts 27 on both sides thereof. The upper part of the lower link 26 is pivotally attached to the side frame 17 of the dorsal frame 3 by a pivot shaft 28. The lower part of the transmission member 20 is attached to the upper and lower intermediate part of the lower link 26 by a shaft 29.
When the rear collision detector 25 moves backward due to the backward movement of the seated person, this energy is transmitted to the upper link rod 15 via the lower link 26 and the transmission member 20, and the upper link rod 15 is transmitted to the rear of the seated person. The headrest 6 is moved forward by the moving energy to support the seated person's head.

この場合、後突感知体２５が後方移動すると、下側リンク２６は伝動部材２０を下方に牽引し、伝動部材２０は上側リンク杆１５の下部を下方回動させ、上側リンク杆１５の上部は前方回動してヘッドレスト６を前方移動させる。
したがって、上側リンク杆１５は、前記後突感知体２５の移動量を増幅させてヘッドレスト６を前方移動させ、ヘッドレスト６の移動量を十分に確保でき、着座者の頭部の支持を確実にする。
しかして、前記下側リンク２６および前記上側リンク杆１５の各部材は、前記背凭フレーム３の左右側部フレーム１７と並行方向の板状に形成すると共に、側部フレーム１７に取付けているので、左右の側部フレーム１７の間には前記後突感知体２５が位置するだけであり、着座者に着座時の違和感あるいは不快感を与えない。 In this case, when the rear collision detector 25 moves backward, the lower link 26 pulls the transmission member 20 downward, the transmission member 20 rotates the lower portion of the upper link rod 15 downward, and the upper portion of the upper link rod 15 The headrest 6 is moved forward by rotating forward.
Therefore, the upper link rod 15 amplifies the amount of movement of the rear collision detector 25 and moves the headrest 6 forward, so that the amount of movement of the headrest 6 can be sufficiently secured and the head of the seated person is reliably supported. .
Thus, each member of the lower link 26 and the upper link rod 15 is formed in a plate shape parallel to the left and right side frames 17 of the back frame 3 and is attached to the side frame 17. The rear collision detector 25 is only positioned between the left and right side frames 17 and does not give the seated person an uncomfortable feeling or an uncomfortable feeling.

しかして、背凭シート２の背凭フレーム３には、板状支持材３０を設ける。板状支持材３０は着座者の上体（腰部を含む上半身）を支持するものである。板状支持材３０は着座者の上体を「面」で支持して、着座姿勢を安定させ、ヘッドレスト６による頭部の支持を良好にさせる。
即ち、従来の上下に並設したジグザグバネ構成では、着座者の上体は荷重により後方移動する各ジグザグバネにより「線」で支持されるので、着座姿勢が安定せず、後突のとき前方移動するヘッドレスト６が頭部を支持しても、着座者の上体が後方移動してしまって、頭部と上体との位置関係がかえって不安定になるが、本願では、板状支持材３０により着座者の上体全体を「面」で支持できて、前方移動するヘッドレスト６が頭部を支持しているときに、板状支持材３０が着座者の上体を「面」で支持するので、頭部を含めた着座者の着座姿勢を極めて安定させる。 Therefore, a plate-like support member 30 is provided on the dorsal frame 3 of the dorsal seat 2. The plate-like support member 30 supports the upper body of the seated person (upper body including the waist). The plate-like support member 30 supports the upper body of the seated person with a “surface”, stabilizes the sitting posture, and makes the headrest 6 support well.
In other words, in the conventional zigzag spring configuration arranged vertically, the upper body of the seated person is supported by “line” by each zigzag spring that moves backward due to the load, so the seating posture is not stable and moves forward in the case of a rear collision. Even if the headrest 6 supports the head, the upper body of the seated person moves backward, and the positional relationship between the head and the upper body becomes unstable. Since the entire upper body of the seated person can be supported by the “surface” and the headrest 6 moving forward supports the head, the plate-like support member 30 supports the upper body of the seated person by the “surface”. The seating posture of the seated person including the head is extremely stabilized.

前記板状支持材３０は、略四角形の一枚板状のプレート体３１により形成し、プレート体３１は、ポリプロピレン等の合成樹脂により、着座者を支持しうる所定の強度を有しつつ、着座者からの後方荷重（体重の場合も含む）を受けたときある程度弾性変形しながら荷重支持するように構成すると、所謂「当たり」と呼ばれる背当たり時の感触を柔軟にできて、好適である。
板状支持材３０は、前記プレート体３１をジグザグスプリングやフォームドワイヤスプリング等のワイヤスプリング３２を介して背凭フレーム３に前後移動自在に取付けて構成し、板状支持材３０は略面状態を保持したまま前後して着座者を支持する。
前記ワイヤスプリング３２は、所定の弾性を有しており、プレート体３１に荷重が掛かったときに、プレート体３１全体が面形状を保持したまま後方移動しうるように構成するが、前記プレート体３１は、該プレート体３１の上縁付近が上側ワイヤスプリング３２Ａにより、前記プレート体３１の上下中間の所定位置が下側ワイヤスプリング３２Ｂより夫々支持されるように、背凭フレーム３に取付ける。 The plate-like support member 30 is formed by a substantially rectangular single plate-like plate body 31, and the plate body 31 is seated while having a predetermined strength capable of supporting a seated person by a synthetic resin such as polypropylene. If the load is supported while being elastically deformed to some extent when it receives a rear load (including the case of weight) from a person, it is preferable because the feeling at the time of back contact called “contact” can be made flexible.
The plate-like support member 30 is configured by attaching the plate body 31 to the dorsal frame 3 via a wire spring 32 such as a zigzag spring or a formed wire spring so that the plate-like support member 30 can move back and forth. Support the seated person by holding back and forth.
The wire spring 32 has a predetermined elasticity, and is configured such that when a load is applied to the plate body 31, the entire plate body 31 can move backward while maintaining the surface shape. 31 is attached to the dorsal frame 3 so that the upper edge of the plate body 31 is supported by the upper wire spring 32A, and the predetermined positions between the upper and lower sides of the plate body 31 are supported by the lower wire spring 32B.

前記下側ワイヤスプリング３２Ｂは正面視において略直線状に形成して該下側ワイヤスプリング３２Ｂより下方のプレート体３１の部分を下側撓み部３３に形成する。下側撓み部３３は、側面視、着座者の荷重が掛かるとプレート体３１の上部に対して後方に撓み、この状態の面形状を保持したままでプレート体３１全体が後方移動するように構成する。
即ち、前記下側ワイヤスプリング３２Ｂは着座者の荷重を支持する剛性を有して形成し、これに対して、前記下側撓み部３３は着座者の荷重により撓む弾性を有するように形成する。
したがって、下側撓み部３３は、着座者の荷重が掛かると下側ワイヤスプリング３２Ｂの付近を支点に後方に撓む。
また、前記下側ワイヤスプリング３２Ｂの左右中間部分には平面視前方に突き出る中間屈曲部３２Ｃを形成し、該中間屈曲部３２Ｃはプレート体３１に形成した係合孔３２Ｄに係合させる。中間屈曲部３２Ｃと係合孔３２Ｄは、下側ワイヤスプリング３２Ｂとプレート体３１との上下左右の位置ずれを防止すると共に、係合孔３２Ｄによりプレート体３１の剛性を低くし、中間屈曲部３２Ｃが下側撓み部３３の後方に撓む支点となる作用も期待する。 The lower wire spring 32B is formed in a substantially straight line when viewed from the front, and a portion of the plate body 31 below the lower wire spring 32B is formed in the lower bending portion 33. The lower bending portion 33 is configured to bend rearward with respect to the upper portion of the plate body 31 when viewed from the side, when a seated person's load is applied, and the entire plate body 31 moves backward while maintaining the surface shape in this state. To do.
That is, the lower wire spring 32B is formed to have rigidity to support a seated person's load, while the lower bending portion 33 is formed to have elasticity to be bent by the seated person's load. .
Therefore, the lower bending portion 33 bends backward with the vicinity of the lower wire spring 32B as a fulcrum when a load on the seated person is applied.
Further, an intermediate bent portion 32C protruding forward in plan view is formed in the left and right intermediate portion of the lower wire spring 32B, and the intermediate bent portion 32C is engaged with an engagement hole 32D formed in the plate body 31. The intermediate bent portion 32C and the engagement hole 32D prevent vertical and horizontal misalignment between the lower wire spring 32B and the plate body 31, and lower the rigidity of the plate body 31 by the engagement hole 32D. The effect | action used as the fulcrum which bends behind the lower side bending part 33 is also anticipated.

上側ワイヤスプリング３２Ａおよび下側ワイヤスプリング３２Ｂの夫々の端部は背凭フレーム３の側部フレーム１７に夫々取付ける。
しかして、下側撓み部３３の裏側にはサポートバネ３４を設ける。サポートバネ３４はＵ型形状に形成し（図６）、線経および材質等を変更して下側撓み部３３の撓み荷重の設定を変更する。
即ち、サポートバネ３４を硬くすると、下側撓み部３３の後方撓み量を少なくし、サポートバネ３４を軟らかくすると下側撓み部３３の後方撓み量を大きくする。
しかして、プレート体３１の上下中間所定位置の後方に、前記後突感知体２５を位置させる。 The respective ends of the upper wire spring 32A and the lower wire spring 32B are attached to the side frames 17 of the dorsal frame 3 respectively.
Therefore, a support spring 34 is provided on the back side of the lower bending portion 33. The support spring 34 is formed in a U shape (FIG. 6), and the setting of the bending load of the lower bending portion 33 is changed by changing the line length and material.
That is, if the support spring 34 is hardened, the amount of backward bending of the lower bending portion 33 is reduced, and if the support spring 34 is softened, the amount of backward bending of the lower bending portion 33 is increased.
Thus, the rear impact detection body 25 is positioned behind the upper and lower intermediate predetermined positions of the plate body 31.

即ち、背凭フレーム３に板状支持材３０を設けたことで、板状支持材３０の上端から下端の何れかの部分の後方に後突感知体２５を設ければ後突を感知できるようになる点、板状支持材３０の上下中間部分は後方移動量が大きく後突のとき後突感知体２５を大きく移動させて確実に後突を感知できる点、また、後突感知体２５を上方に設けると、その部分の板状支持材３０を所定量後方移動させることになって、着座者の上体の支持が不足してしまう点等の理由から、プレート体３１の上下中間部分の後方に後突感知体２５を位置させる。
したがって、板状支持材３０による着座者の支持と、後突感知体２５による後突の感知の確実性とを両立させられる。 That is, by providing the plate-like support member 30 on the dorsal frame 3, it is possible to detect a rear-end collision if the rear-end collision detector 25 is provided behind any portion from the upper end to the lower end of the plate-like support member 30. The upper and lower middle portions of the plate-like support member 30 have a large rearward movement amount, and when the rear impact occurs, the rear impact detector 25 can be moved greatly to reliably detect the rear impact, and the rear impact detector 25 If it is provided above, the plate-like support member 30 of that portion is moved backward by a predetermined amount, and the upper and lower intermediate portions of the plate body 31 are not supported for reasons such as insufficient support of the upper body of the seated person. The rear collision detector 25 is positioned rearward.
Therefore, both the support of the seated person by the plate-like support member 30 and the certainty of the detection of the rear collision by the rear collision detector 25 can be achieved.

しかして、前記板状支持材３０のプレート体３１の表側には、プレート体３１に対して前後する弾力調節プレート４０を設ける。
弾力調節プレート４０は、弾性を有する合成樹脂製の一枚板状に形成する。弾力調節プレート４０の後面の上部所定位置には後側に突き出る後方突出係合部４１と前方突出係合部４２を左右方向に夫々複数並設する（図８）。上部突出部後方突出係合部４１および前方突出係合部４２はプレート体３１に形成した上側係合孔４３と下側係合孔４４とに係合させる（図６、図９）。
後方突出係合部４１は上側に後方膨出部４５を形成し、後方膨出部４５の下面に下向き円弧係合面４６を設けて形成する。下向き円弧係合面４６は上側係合孔４３内の下面に下側円弧面４７に係合する。前方突出係合部４２は後方突出係合部４１の下向き円弧係合面４６より後側に膨出する前方膨出部５０を形成し、前方膨出部５０の下面に上向き円弧係合面５１を設けて形成する。上向き円弧係合面５１は下側係合孔４４内の上面の上側円弧面５２に係合する。 Thus, on the front side of the plate body 31 of the plate-shaped support member 30, an elasticity adjusting plate 40 that moves back and forth with respect to the plate body 31 is provided.
The elasticity adjusting plate 40 is formed in a single plate shape made of synthetic resin having elasticity. A plurality of rearward projecting engaging portions 41 and front projecting engaging portions 42 projecting rearward are arranged in the left and right directions at predetermined positions on the rear surface of the elastic adjustment plate 40 (FIG. 8). The upper projecting portion rear projecting engaging portion 41 and the front projecting engaging portion 42 are engaged with an upper engaging hole 43 and a lower engaging hole 44 formed in the plate body 31 (FIGS. 6 and 9).
The rear protruding engagement portion 41 is formed by forming a rear bulge portion 45 on the upper side and providing a downward arc engagement surface 46 on the lower surface of the rear bulge portion 45. The downward arc engagement surface 46 engages with the lower arc surface 47 on the lower surface in the upper engagement hole 43. The front projecting engagement portion 42 forms a front bulging portion 50 that bulges rearward from the downward arc engaging surface 46 of the rear projecting engagement portion 41, and an upward arc engaging surface 51 on the lower surface of the front bulging portion 50. Is formed. The upward arc engagement surface 51 engages with the upper arc surface 52 on the upper surface in the lower engagement hole 44.

この場合、上側係合孔４３の下側円弧面４７と下側係合孔４４の上側円弧面５２とは、側面視所定位置に設けた中心Ｇとする同心円と略一致する円弧面となるように夫々形成し（図９）、後方突出係合部４１および前方突出係合部４２を上側係合孔４３と下側係合孔４４に挿入係合後、前記中心Ｇを軸心として弾力調節プレートが回動するように構成する。
即ち、弾力調節プレート４０の上部は、後方突出係合部４１および前方突出係合部４２を、プレート体３１の上側係合孔４３と下側係合孔４４に、前側から挿入し（図９）、挿入後、後方突出係合部４１の下向き円弧係合面４６を上側係合孔４３の下側円弧面４７に係合させ（図１０）、前方突出係合部４２の上向き円弧係合面５１を下側係合孔４４の上側円弧面５２に係合させ、次に、中心Ｇを軸心として弾力調節プレート４０を下方回動させると、弾力調節プレート４０はプレート体３１の前面に重なる（図１１）。 In this case, the lower arc surface 47 of the upper engagement hole 43 and the upper arc surface 52 of the lower engagement hole 44 are arc surfaces that substantially coincide with a concentric circle having a center G provided at a predetermined position in a side view. (FIG. 9), and after the rear projecting engaging portion 41 and the front projecting engaging portion 42 are inserted and engaged in the upper engaging hole 43 and the lower engaging hole 44, the elasticity is adjusted with the center G as an axis. The plate is configured to rotate.
That is, the upper part of the elasticity adjusting plate 40 is inserted with the rear projecting engagement part 41 and the front projecting engagement part 42 into the upper engagement hole 43 and the lower engagement hole 44 of the plate body 31 from the front side (FIG. 9). After insertion, the downward arc engagement surface 46 of the rearward projecting engagement portion 41 is engaged with the lower arc surface 47 of the upper engagement hole 43 (FIG. 10), and the upward arc engagement of the forward projection engagement portion 42 is performed. When the surface 51 is engaged with the upper circular arc surface 52 of the lower engagement hole 44 and then the elasticity adjusting plate 40 is rotated downward with the center G as an axis, the elasticity adjusting plate 40 is placed on the front surface of the plate body 31. Overlapping (FIG. 11).

弾力調節プレート４０の下部所定位置には後側に突き出る下部係合部５５を形成する。下部係合部５５にはワイヤーケーブル５６のインナーケーブル５７の先端が挿入されるケーブル挿入溝５８を形成する（図６、図１４）。弾力調節プレート４０の下部係合部５５はプレート体３１の下部に設けた下側開口部６０よりプレート体３１の後側に突出させ、プレート体３１の後側に突出する下部係合部５５のケーブル挿入溝５８にインナーケーブル５７の先端を嵌合させ、下部係合部５５の嵌合部５５Ａにインナーケーブル５７の先端のケーブル先端係合体６１を係合させて係止する（図１４では理解を容易にするため嵌合部５５Ａにケーブル先端係合体６１を接触させていないが、これにより構成は限定されない）。
この場合、前記下部係合部５５と下側開口部６０は略同じ左右幅に形成し、前記下部係合部５５の側縁が下側開口部６０の内周に摺接しながら上下するように構成すると、下部係合部５５と下側開口部６０とが互いにガイドのように作用して、弾力調節プレート４０の弾力調節作用を円滑・確実にでき、好適である。 A lower engaging portion 55 protruding rearward is formed at a predetermined position below the elasticity adjusting plate 40. A cable insertion groove 58 into which the tip of the inner cable 57 of the wire cable 56 is inserted is formed in the lower engagement portion 55 (FIGS. 6 and 14). The lower engaging portion 55 of the elasticity adjusting plate 40 protrudes from the lower opening 60 provided at the lower portion of the plate body 31 to the rear side of the plate body 31, and the lower engaging portion 55 protrudes to the rear side of the plate body 31. The tip of the inner cable 57 is fitted into the cable insertion groove 58, and the cable tip engaging body 61 at the tip of the inner cable 57 is engaged and locked to the fitting portion 55A of the lower engaging portion 55 (understand in FIG. 14). For this reason, the cable tip engagement body 61 is not brought into contact with the fitting portion 55A, but the configuration is not limited thereby).
In this case, the lower engaging portion 55 and the lower opening 60 are formed to have substantially the same left and right width, and the side edges of the lower engaging portion 55 are moved up and down while sliding on the inner periphery of the lower opening 60. If comprised, the lower engaging part 55 and the lower side opening part 60 will act like a guide mutually, and the elasticity adjustment effect | action of the elasticity adjustment plate 40 can be performed smoothly and reliably, and it is suitable.

また、下側開口部６０の上下長さは、前記弾力調節プレート４０が撓むために前記下部係合部５５が上下しうる所定長さを有して開口させる。
プレート体３１の左右中央位置にはワイヤーケーブル５６のアウターチューブ６２のチューブ先端６３を係止するチューブ係止部６５を設ける（図６）。チューブ係止部６５はチューブ先端６３の一部または全部がプレート体３１の前後の幅内に埋没するような凹部形状に形成すればよく、実施例ではチューブ係止部６５は、プレート体３１に上側開口部６７を形成し、上側開口部６７の左右側縁に一対の腕部６６を設け、上側開口部６７と左右の腕部６６とによりチューブ先端６３が埋没するような凹部空間を形成し、上側開口部６７にチューブ先端６３を嵌合させる。チューブ先端６３はチューブ係止部６５の腕部６６により左右両側から挟持されながら、上側開口部６７に嵌合する。 The lower opening 60 is opened with a predetermined length that allows the lower engagement portion 55 to move up and down because the elasticity adjusting plate 40 is bent.
A tube locking portion 65 for locking the tube tip 63 of the outer tube 62 of the wire cable 56 is provided at the left and right center position of the plate body 31 (FIG. 6). The tube locking portion 65 may be formed in a concave shape so that part or all of the tube tip 63 is buried in the front and rear width of the plate body 31. In the embodiment, the tube locking portion 65 is formed on the plate body 31. An upper opening 67 is formed, a pair of arm portions 66 are provided at the left and right edges of the upper opening 67, and a recess space is formed by the upper opening 67 and the left and right arm portions 66 so that the tube tip 63 is buried. The tube tip 63 is fitted into the upper opening 67. The tube tip 63 is fitted into the upper opening 67 while being sandwiched from the left and right sides by the arm portion 66 of the tube locking portion 65.

前記チューブ係止部６５と前記下部係合部５５との間のプレート体３１には、前側に凹む嵌合溝６８を形成し（図６）、嵌合溝６８にインナーケーブル５７を嵌合させる。
ワイヤーケーブル５６は、インナーケーブル５７を牽引すると、インナーケーブル５７のケーブル先端係合体６１を取付けた弾力調節プレート４０の下部係合部５５を上方に牽引し、弾力調節プレート４０の下部係合部５５を上方に引き寄せ、その結果、弾力調節プレート４０の上縁と弾力調節プレート４０の下部係合部５５の間の距離を短くして、弾力調節プレート４０の前面を前方に押出す。
しかして、前記サポートバネ３４は縦軸部３４Ａと横軸部サポートバネ３４ＢとによりＵ型形状に形成し（図６）、縦軸部３４Ａは下側開口部６０の左右両側に、横軸部サポートバネ３４Ｂは下側開口部６０の下縁より下側に位置するようにすると、下側撓み部３３の撓み量の設定を容易および正確にできて、好適である。 The plate body 31 between the tube locking portion 65 and the lower engagement portion 55 is formed with a fitting groove 68 recessed in the front side (FIG. 6), and the inner cable 57 is fitted into the fitting groove 68. .
When the inner cable 57 is pulled, the wire cable 56 pulls the lower engaging portion 55 of the elasticity adjusting plate 40 to which the cable tip engaging body 61 of the inner cable 57 is attached, and the lower engaging portion 55 of the elasticity adjusting plate 40. As a result, the distance between the upper edge of the elasticity adjusting plate 40 and the lower engaging portion 55 of the elasticity adjusting plate 40 is shortened, and the front surface of the elasticity adjusting plate 40 is pushed forward.
Thus, the support spring 34 by a vertical shaft portion 34A and the horizontal axis portion support spring 34B is formed in a U-shaped (FIG. 6), the vertical axis portion 34A in the right and left sides of the lower opening 60, the horizontal rod portion If the support spring 34B is positioned below the lower edge of the lower opening 60, the amount of bending of the lower bending portion 33 can be set easily and accurately, which is preferable.

しかして、弾力調節プレート４０の所定部分は、該弾力調節プレート４０の上縁側（係合部４１）と下縁側（下部係合部５５）との間隔を狭くしたとき前方に突き出る押出面部７０に形成し、該押出面部７０付近の弾力調節プレート４０を前後移動させて該弾力調節プレート４０の着座者の身体の支持弾力を調節するように構成する。
即ち、単に、弾力調節プレート４０を上下に撓ませても前方移動する部分が上下にばらつくと着座感を損なうので、予め所定部分が前方に湾曲するように押出面部７０を設ける。
前記押出面部７０の構成は任意であるが、図２３は、押出面部７０の部分の弾力調節プレート４０に、左右方向の溝またはスリット７１を上下に並設して構成し、溝またはスリット７１があるため応力が集中することで湾曲する。図２４は、押出面部７０の部分の弾力調節プレート４０を、他の弾力調節プレート４０の部分に比し若干肉厚を薄くした薄肉部７２に形成して構成する。また、図２５は押出面部７０の部分の弾力調節プレート４０に所定形状の孔７３を形成して構成したものである。７４は、前記弾力調節プレート４０の外縁所定部分を切り欠いた形成した切欠部であり、切欠部７４は弾力調節プレート４０の断面積を減少させてその分湾曲するようにしている。 Thus, the predetermined portion of the elasticity adjusting plate 40 is formed on the pushing surface portion 70 that protrudes forward when the interval between the upper edge side (engagement portion 41) and the lower edge side (lower engagement portion 55) of the elasticity adjustment plate 40 is narrowed. The elasticity adjustment plate 40 in the vicinity of the push-out surface portion 70 is moved back and forth to adjust the support elasticity of the body of the seated person of the elasticity adjustment plate 40.
That is, even if the elasticity adjusting plate 40 is simply bent up and down, if the portion that moves forward fluctuates up and down, the seating feeling is impaired. Therefore, the extrusion surface portion 70 is provided in advance so that the predetermined portion is curved forward.
Although the configuration of the extrusion surface portion 70 is arbitrary, FIG. 23 shows that the elastic adjustment plate 40 of the portion of the extrusion surface portion 70 is configured by arranging horizontal grooves or slits 71 side by side in the vertical direction. Because it is, it bends when stress is concentrated. In FIG. 24, the elasticity adjusting plate 40 in the portion of the extrusion surface portion 70 is formed as a thin portion 72 that is slightly thinner than the portions of the other elasticity adjusting plates 40. FIG. 25 shows a configuration in which a hole 73 having a predetermined shape is formed in the elasticity adjusting plate 40 of the extrusion surface portion 70. Reference numeral 74 denotes a notch formed by notching a predetermined portion of the outer edge of the elasticity adjusting plate 40. The notch 74 is made to be curved by reducing the cross-sectional area of the elasticity adjusting plate 40.

また、図２６の押出面部７０は、押出面部７０の上下部分の弾力調節プレート４０の裏面に、所定形状のリブ７５を形成し、押出面部７０の上下両側の弾力調節プレート４０の剛性を高めることにより、弾力調節プレート４０を撓ませたとき押出面部７０が湾曲するように構成している。
この場合、押出面部７０の位置は、弾力調節プレート４０の後方突出係合部４１と下部係合部５５との上下中間より下方であって、後方突出係合部４１と押出面部７０との間隔Ｋよりも押出面部７０と下部係合部５５との間隔Ｌの方が短くなるように構成する。
即ち、弾力調節プレート４０は、下部係合部５５を上方移動させて押出面部７０を前方移動させると共に、後方突出係合部４１と押出面部７０との間隔Ｋよりも押出面部７０と下部係合部５５との間隔Ｌの方が短くなるように構成することにより、押出面部７０が弾力調節プレート４０の上縁付近を支点として移動するときの移動半径を可及的に長くし、弾力調節プレート４０の撓みによる押出面部７０の前後移動の際の上下位置の変動を抑制する。 26 is formed with ribs 75 having a predetermined shape on the back surface of the elastic adjustment plate 40 at the upper and lower portions of the extrusion surface portion 70 to increase the rigidity of the elastic adjustment plates 40 on both the upper and lower sides of the extrusion surface portion 70. Thus, the push-out surface portion 70 is configured to bend when the elasticity adjusting plate 40 is bent.
In this case, the position of the push-out surface portion 70 is below the middle of the upper and lower portions of the rearward projecting engagement portion 41 and the lower engagement portion 55 of the elasticity adjusting plate 40, and the distance between the rearward projecting engagement portion 41 and the push-out surface portion 70. The distance L between the extrusion surface portion 70 and the lower engagement portion 55 is configured to be shorter than K.
That is, the elasticity adjusting plate 40 moves the lower engagement portion 55 upward to move the extrusion surface portion 70 forward, and also engages the extrusion surface portion 70 and the lower engagement portion more than the distance K between the rearward projecting engagement portion 41 and the extrusion surface portion 70. By configuring so that the distance L to the portion 55 is shorter, the moving radius when the extruded surface portion 70 moves around the upper edge of the elasticity adjusting plate 40 as a fulcrum is made as long as possible, and the elasticity adjusting plate The fluctuation of the vertical position at the time of forward and backward movement of the extrusion surface portion 70 due to the bending of 40 is suppressed.

換言すると、弾力調節プレート４０の下端を位置固定状態にして弾力調節プレート４０の上端を下降させると、押出面部７０は弾力調節プレート４０の下端を支点として下がりながら前方に押出されるので、押出面部７０の上下移動距離は大きくなるが、本願は、弾力調節プレート４０の上端の後方突出係合部４１を位置固定状態にして弾力調節プレート４０の下部係合部５５を上動させて弾力調節プレート４０を撓ませるので、押出面部７０が前後するに際しての上下方向の変位量を可及的に抑制する。   In other words, when the lower end of the elasticity adjusting plate 40 is fixed and the upper end of the elasticity adjusting plate 40 is lowered, the pushing surface portion 70 is pushed forward while lowering the lower end of the elasticity adjusting plate 40 as a fulcrum. Although the vertical movement distance of 70 is increased, in the present application, the elasticity adjustment plate is moved by moving the lower engagement portion 55 of the elasticity adjustment plate 40 upward with the rearward projecting engagement portion 41 at the upper end of the elasticity adjustment plate 40 in a fixed position. Since 40 is bent, the amount of displacement in the vertical direction when the extrusion surface portion 70 moves back and forth is suppressed as much as possible.

（実施例の作用）
ヘッドレスト６のピラー８を支持するピラー支持部材１１を、ヘッドレスト取付杆１０に固定し、ヘッドレスト取付杆１０の左右両側は夫々上側リンク杆１５の上部に固定し、各上側リンク杆１５の上下中間部は回動軸１６により側部フレーム１７に取付け、上側リンク杆１５の下端部に伝動部材２０の上部を取付け、伝動部材２０の下部は上部を側部フレーム１７に取付けた下側リンク２６の上下中間部に軸着し、下側リンク２６の下部に後突感知体２５の左右両側を連結状態に取付けているから、後方から衝撃を受けて慣性で着座者が後方へ移動すると、クッション材４を後方に押し、クッション材４はプレート体３１を後方に押し、プレート体３１は後突感知体２５を後方移動させ、後突感知体２５の後方移動により下側リンク２６が回動して伝動部材２０を下方に牽引し、伝動部材２０は上側リンク杆１５を回動軸１６中心に下方回動させ、上側リンク杆１５の上部は回動軸１６中心に前方回動し、これによりヘッドレスト６は軸２１中心に前方移動する。
したがって、ヘッドレスト６は上側リンク杆１５により前方回動して頭部を支持し、むち打ち症防止効果を奏する。 (Operation of Example)
The pillar support member 11 that supports the pillar 8 of the headrest 6 is fixed to the headrest mounting rod 10, and both the left and right sides of the headrest mounting rod 10 are fixed to the upper portion of the upper link rod 15. Is attached to the side frame 17 by the rotating shaft 16, the upper part of the transmission member 20 is attached to the lower end of the upper link rod 15, and the lower part of the transmission member 20 is vertically connected to the lower link 26 attached to the side frame 17. Since the left and right sides of the rear impact detector 25 are attached to the lower part of the lower link 26 in a connected state, the cushion member 4 is received when the seated person moves rearward due to an impact from the rear. , The cushion member 4 pushes the plate body 31 rearward, the plate body 31 moves the rear collision detection body 25 backward, and the lower link 26 is moved by the rear movement of the rear collision detection body 25. The transmission member 20 is moved downward to cause the upper link rod 15 to rotate downward about the rotation shaft 16, and the upper portion of the upper link rod 15 rotates forward about the rotation shaft 16. As a result, the headrest 6 moves forward about the shaft 21.
Accordingly, the headrest 6 is rotated forward by the upper link rod 15 to support the head, and has an effect of preventing whiplash.

しかして、上側リンク杆１５は、回動軸１６より上方部分を上リンクアーム部２２に、回動軸１６より下方部分を下リンクアーム部２３に夫々形成し、上リンクアーム部２２は下リンクアーム部２３よりも長く形成しているから、後突感知体２５の移動量（伝動部材２０の上下移動量）に対して、ヘッドレスト取付杆１０の移動量を格段に大きくでき、しかも、ヘッドレスト取付杆１０より上方にあるヘッドレスト６は更に前方移動量が増加し、移動量を十分に確保でき、着座者の頭部の支持を確実にする。
この場合、上側リンク杆１５の下リンクアーム部２３は下方に至るに従い前側に位置するように、傾斜させているから、上側リンク杆１５は伝動部材２０を介して後突感知体２５の後方移動を前方移動に変換してヘッドレスト６を前方移動させる。 Thus, the upper link rod 15 is formed with the upper part of the upper link arm portion 22 above the rotation shaft 16 and the lower link arm portion 23 with the lower portion of the rotation shaft 16. Since it is formed longer than the arm portion 23, the movement amount of the headrest mounting rod 10 can be remarkably increased with respect to the movement amount of the rear collision detector 25 (the vertical movement amount of the transmission member 20). The headrest 6 located above the heel 10 further increases the amount of forward movement, so that the amount of movement can be sufficiently secured and the seated person's head is reliably supported.
In this case, since the lower link arm portion 23 of the upper link rod 15 is inclined so as to be positioned on the front side as it goes downward, the upper link rod 15 moves rearward of the rear collision detector 25 via the transmission member 20. Is converted to forward movement, and the headrest 6 is moved forward.

そのため、上側リンク杆１５は、ヘッドレスト６を前方移動させるのに、下リンクアーム部２３を後方移動させるので、下リンクアーム部２３の作動方向が後方から衝撃を受けた着座者の移動方向（後方移動）と同じになって、着座者の後方移動を妨げることはなく、むしろ有効に作動するように作用し、合理的な構成となる。
即ち、仮に、下リンクアーム部２３の作動方向を前側にすると、着座者の移動方向（後方移動）と相反することになり、着座者の後方移動を妨げ、有効に作動しない。
したがって、下リンクアーム部２３は回動軸１６中心に後方移動するので、上側リンク杆１５の作動の際、下リンクアーム部２３はクッション材４や表皮部材５を前側に押す必要がなく、確実に作動する。 Therefore, the upper link rod 15 moves the lower link arm portion 23 backward to move the headrest 6 forward, so that the operating direction of the lower link arm portion 23 is the moving direction (rearward) of the seated person who receives an impact from the rear. It is the same as (moving) and does not prevent the seated person from moving backward.
That is, if the operating direction of the lower link arm portion 23 is set to the front side, it will be contrary to the moving direction (backward movement) of the seated person, and the seated person will be prevented from moving rearward and will not operate effectively.
Therefore, since the lower link arm portion 23 moves rearward about the rotation shaft 16, it is not necessary for the lower link arm portion 23 to push the cushion material 4 or the skin member 5 forward when the upper link rod 15 is operated. Operates on.

しかして、下側リンク２６は、その上部を回動軸２８により側部フレーム１７に取付け、その下部に後突感知体２５を取付軸２７により取付け、側部フレーム１７と取付軸２７の間に伝動部材２０の下部を軸２９により取付けているから、下側リンク２６は、取付軸２７を力点、回動軸２８を支点、軸２９を作用点として梃の原理で後突感知体２５の後方移動させる作動力を倍加して軸２９を牽引する。
また、下側リンク２６は、通常は下方に至るに従い前側に位置するように、傾斜させているから、後方から衝撃を受けた後突の際、下側リンク２６は回動軸２８中心に後方回動する。
そのため、下側リンク２６も上側リンク杆１５の下リンクアーム部２３と同様に、作動方向が着座者の移動方向（後方移動）と一致して合理的な構成となり、作動の際、クッション材４や表皮部材５からの干渉も回避して確実に作動する。 Accordingly, the lower link 26 is attached to the side frame 17 at the upper portion thereof by the rotation shaft 28, and the rear collision detector 25 is attached to the lower portion thereof by the attachment shaft 27, and between the side frame 17 and the attachment shaft 27. Since the lower part of the transmission member 20 is attached by the shaft 29, the lower link 26 is located behind the rear collision detector 25 on the principle of scissors, with the attachment shaft 27 as a force point, the rotation shaft 28 as a fulcrum, and the shaft 29 as an action point. The operating force to be moved is doubled and the shaft 29 is pulled.
Further, since the lower link 26 is inclined so that it is normally positioned on the front side as it goes downward, the lower link 26 is rearward about the rotation shaft 28 at the time of a rear collision that receives an impact from the rear. Rotate.
Therefore, similarly to the lower link arm portion 23 of the upper link rod 15, the lower link 26 has a rational configuration in which the operation direction coincides with the movement direction (rearward movement) of the seated person. Further, interference from the skin member 5 is avoided and the operation is ensured.

したがって、上側リンク杆１５、伝動部材２０、下側リンク２６の作動機構は、その前側にクッション材４および表皮部材５が存在しても、作動方向が後側方向となるので、クッション材４および表皮部材５による圧力の干渉を避けられ、後突感知体２５の移動をヘッドレスト６に伝達するのときロスを極力排除でき、作動を確実にする。
しかして、背凭シート２の背凭フレーム３には板状支持材３０を設け、板状支持材３０は略四角形の一枚板状に形成したプレート体３１をワイヤスプリング３２を介して背凭フレーム３に前後移動自在に取付けて構成しているから、板状支持材３０は、保持したまま前後移動して着座者を支持する。
そのため、従来の上下に並設して「線」で支持するジグザグバネ構成に比して格段に着座感を向上させる。 Therefore, the operating mechanism of the upper link rod 15, the transmission member 20, and the lower link 26 is such that the operating direction is the rear direction even if the cushion material 4 and the skin member 5 are present on the front side. Pressure interference by the skin member 5 can be avoided, and loss can be eliminated as much as possible when the movement of the rear collision detector 25 is transmitted to the headrest 6, thereby ensuring the operation.
Thus, the back frame 3 of the back sheet 2 is provided with a plate-like support member 30, and the plate-like support member 30 is a plate body 31 formed in a substantially rectangular single plate shape via a wire spring 32. Since it is configured to be attached to the frame 3 so as to be movable back and forth, the plate-like support member 30 moves back and forth while supporting it to support the seated person.
Therefore, the seating feeling is greatly improved as compared with the conventional zigzag spring configuration in which the upper and lower sides are arranged side by side and supported by “lines”.

即ち、「線」で支持するジグザグバネでは、後突のとき前方移動するヘッドレスト６によって頭部を支持しても、着座者の上体の支持不安定になって頭部と上体との位置関係がかえって悪化する惧れがあるが、本願では、板状支持材３０により着座者の上体全体を「面」で支持するので、前方移動するヘッドレスト６と相俟って頭部および着座者の上体を良好に支持でき、頭部を含めた着座者の着座姿勢を極めて安定させる。
しかして、プレート体３１の下側部分は、着座者の仙骨付近に位置させると、着座者の腰部付近を確実にホールドでき、好適である。
また、板状支持材３０のプレート体３１は略四角形の一枚板状に形成しているから、プレート体３１の所定部分にのみ掛かる荷重も、プレート体３１全体が後方に移動することで上下左右に荷重を分散させ、確実に支持する。
即ち、例えば、上下にプレート体３１を分割して形成すると、上下のプレート体３１の間の部分に荷重が掛かったとき、上下のプレート体３１は夫々回転して荷重を確実に支持できないことがあるが、本願は、略四角形の一枚板状のプレート体３１により板状支持材３０を形成しているので、上下中間に掛かる荷重も板状支持材３０全体により確実に受け止めて支持する。 That is, in the zigzag spring supported by the “line”, even if the head is supported by the headrest 6 that moves forward at the time of a rear collision, the support of the upper body of the seated person becomes unstable and the positional relationship between the head and the upper body However, in the present application, since the entire upper body of the seated person is supported by the “plane” by the plate-like support member 30, the head and the seated person's head are coupled with the headrest 6 that moves forward. The upper body can be supported well, and the sitting posture of the seated person including the head is extremely stabilized.
Therefore, if the lower part of the plate body 31 is positioned near the sacrum of the seated person, the vicinity of the waist of the seated person can be reliably held, which is preferable.
In addition, since the plate body 31 of the plate-like support member 30 is formed in a substantially rectangular single plate shape, the load applied only to a predetermined portion of the plate body 31 can be increased or decreased by moving the entire plate body 31 backward. Distribute the load to the left and right to support it securely.
That is, for example, if the upper and lower plate bodies 31 are divided and formed, when a load is applied to a portion between the upper and lower plate bodies 31, the upper and lower plate bodies 31 may rotate and cannot reliably support the load. However, in the present application, since the plate-like support member 30 is formed by the substantially rectangular single plate-like plate body 31, the load applied to the middle of the upper and lower sides is reliably received and supported by the entire plate-like support member 30.

なお、プレート体３１は背凭フレーム３に前後移動自在に取付けられ、慣性による移動方向はプレート体３１と後突感知体２５共に同じであるから両者の関係において、互いに干渉し合う事態はなく、板状支持材３０による着座者の支持と、後突感知体２５による後突の感知の確実性とを両立させられ、合理的構成となる。
また、下側リンク２６および上側リンク杆１５の各部材は、背凭フレーム３の左右側部フレーム１７と並行方向の板状に形成して、側部フレーム１７に取付けているので、プレート体３１と後突感知体２５の前後移動に干渉しないように設けることができ、この点でも、合理的な構成となる。
しかして、前記板状支持材３０のプレート体３１の表側には、弾力調節プレート４０を設けており、弾力調節プレート４０の上部は、後方突出係合部４１および前方突出係合部４２を、プレート体３１の上側係合孔４３および下側係合孔４４の夫々に係合させ、弾力調節プレート４０の下部の下部係合部５５は、プレート体３１の下部に設けた下側開口部下側開口部６０よりプレート体３１の後側に突出させ、プレート体３１の後側に突出する下部係合部５５のケーブル挿入溝５８にインナーケーブル５７を嵌合させて、インナーケーブル５７の先端のケーブル先端係合体ケーブル先端係合体６１を下部係合部５５の下面に係合させているから、弾力調節プレート４０の上縁と下縁との間の距離を短くすると、弾力調節プレート４０の上下略中間部分は前側に競り出し、着座者を前方に押す圧力を強くし、反対に、弾力調節プレート４０の上縁と下縁との間隔が長くなると、弾力調節プレート４０の上下中間部分は後側に後退し、着座者を前方に押す圧力を弱くし、着座者に対する弾力を、体格や好みに応じて変更調節する。 In addition, since the plate body 31 is attached to the dorsal frame 3 so as to be movable back and forth, and the direction of movement due to inertia is the same for both the plate body 31 and the rear collision detector 25, there is no situation where they interfere with each other in the relationship between the two. The support of the seated person by the plate-like support member 30 and the certainty of the detection of the rear collision by the rear collision detector 25 can be made compatible, and a rational configuration is obtained.
Each member of the lower link 26 and the upper link rod 15 is formed in a plate shape parallel to the left and right side frames 17 of the back frame 3 and is attached to the side frame 17. The rear collision detector 25 can be provided so as not to interfere with the back-and-forth movement of the rear collision detector 25, and in this respect as well, the configuration is rational.
Thus, an elastic adjustment plate 40 is provided on the front side of the plate body 31 of the plate-shaped support member 30, and the upper portion of the elastic adjustment plate 40 includes a rear protruding engagement portion 41 and a front protruding engagement portion 42. The lower engaging portion 55 below the elasticity adjusting plate 40 is engaged with each of the upper engaging hole 43 and the lower engaging hole 44 of the plate body 31, and the lower opening portion provided below the plate body 31. The inner cable 57 is fitted into the cable insertion groove 58 of the lower engaging portion 55 projecting from the opening 60 to the rear side of the plate body 31 and projecting to the rear side of the plate body 31, so that the cable at the tip of the inner cable 57 Since the front end engaging body cable front end engaging body 61 is engaged with the lower surface of the lower engaging portion 55, when the distance between the upper edge and the lower edge of the elastic adjustment plate 40 is shortened, the upper and lower sides of the elastic adjustment plate 40 are substantially omitted. The middle part competes forward, increasing the pressure pushing the seat forward, and conversely, if the distance between the upper and lower edges of the elastic adjustment plate 40 becomes longer, the upper and lower intermediate parts of the elastic adjustment plate 40 The pressure to push the seated person forward is weakened, and the elasticity for the seated person is changed and adjusted according to the physique and preference.

即ち、弾力調節プレート４０はプレート体３１の表側に設け、プレート体３１の裏側に設けたワイヤーケーブル５６により弾力調節プレート４０の上縁と下縁との間隔を長短に変更させるように構成しているから、プレート体３１の位置に関わらず弾力調節プレート４０は前後して弾力を調節できる。
したがって、弾力調節プレート４０は、背凭フレーム３に対するプレート体３１の全体および後突感知体２５との位置関係を変えずに、前後して弾力を調節でき、弾力調節プレート４０の存在は後突感知体２５を含むむち打ち対策機構やプレート体３１の本来の作用効果に全く影響しない。 That is, the elasticity adjusting plate 40 is provided on the front side of the plate body 31, and the distance between the upper edge and the lower edge of the elasticity adjusting plate 40 is changed to be longer or shorter by the wire cable 56 provided on the back side of the plate body 31. Therefore, regardless of the position of the plate body 31, the elasticity adjusting plate 40 can adjust the elasticity back and forth.
Therefore, the elasticity adjusting plate 40 can adjust the elasticity back and forth without changing the positional relationship between the entire plate body 31 and the rear collision sensing body 25 with respect to the dorsal fin frame 3, and the presence of the elasticity adjusting plate 40 is the rear collision. There is no influence on the whiplash countermeasure mechanism including the sensing body 25 or the original function and effect of the plate body 31.

換言すると、クッション材を前方に押し出す弾力調節機構の場合、常時前方にクッション材を付勢させるため、クッション材の後方移動により後突を感知するため後突感知体の移動方向とは反対になるので、弾力調節機構とむち打ち症対策機構との併用はできないと従来考えられていたが、本願では、プレート体３１の表側に弾力調節プレート４０共に移動するように設けているので、併存を可能にしている。
それゆえ、後突感知体２５とリンク機構により後突時ヘッドレスト６を前方に移動させうるむち打ち対策機構を設けた車両用シート１でありながら、クッション材４を前方に押出す弾力を調節しうる弾力調節プレート４０との併設が可能となる。
つまり、プレート体３１は背凭フレーム３にワイヤスプリング３２を介して前後移動自在に取付けられているから、プレート体３１に対して弾力調節プレート４０は独立して前側に移動し、且つ、後方から衝撃を受けて慣性で着座者が後方へ移動したときは、この慣性力により弾力調節プレート４０とプレート体３１は一体となって後方移動する。この点、プレート体３１に対して弾力調節機構４１の弾力調節プレート４０は独立して前側に移動するが、後突されたときの移動方向は一致して、弾力調節プレート４０およびプレート体３１の後方移動により後突感知体２５が共に後方移動して、後突を感知でき、併設可能となるのである。 In other words, in the case of the elastic force adjusting mechanism that pushes the cushion material forward, the cushion material is always urged forward, so that the rear impact is detected by the rearward movement of the cushion material, which is opposite to the moving direction of the rear impact detector. Therefore, it has been conventionally considered that the elasticity adjusting mechanism and the whiplash countermeasure mechanism cannot be used together. However, in this application, since the elasticity adjusting plate 40 is provided so as to move on the front side of the plate body 31, the coexistence is possible. ing.
Therefore, the elasticity of pushing the cushion material 4 forward can be adjusted while the vehicle seat 1 is provided with a whiplash countermeasure mechanism that can move the headrest 6 forward during the rear collision by the rear collision detector 25 and the link mechanism. The elastic adjustment plate 40 can be provided side by side.
That is, since the plate body 31 is attached to the dorsal frame 3 via the wire spring 32 so as to be movable back and forth, the elasticity adjusting plate 40 moves to the front side independently of the plate body 31 and from the rear side. When the seated person moves rearward due to the impact in response to the impact, the elasticity adjusting plate 40 and the plate body 31 move backward together by the inertial force. In this respect, the elasticity adjusting plate 40 of the elasticity adjusting mechanism 41 moves independently of the plate body 31 to the front side, but the movement direction when rearwardly collides is the same, and the elasticity adjusting plate 40 and the plate body 31 By rearward movement, the rear collision detector 25 moves rearward, and can detect a rear collision and can be provided side by side.

しかして、弾力調節プレート４０は、弾性を有する合成樹脂製の一枚板状に形成し、弾力調節プレート４０の後面の上部所定位置には後側に突き出る後方突出係合部４１と前方突出係合部４２を左右方向に夫々複数並設し、後方突出係合部４１は上側に後方膨出部４５を形成し、後方膨出部４５の下面に下向き円弧係合面４６を設け、前方突出係合部４２は後方突出係合部４１の下向き円弧係合面４６より後側に前方膨出部５０を形成し、前方膨出部５０の下面に上向き円弧係合面５１を設けて形成しているから、後方突出係合部４１および前方突出係合部４２をプレート体３１の上側係合孔４３と下側係合孔４４に前側から挿入すると、後方突出係合部４１および前方突出係合部４２は、互いの後方膨出部４５と前方膨出部５０の間隔を広げながら上側係合孔４３と下側係合孔４４内に進入する。   Thus, the elasticity adjusting plate 40 is formed in the shape of a single plate made of synthetic resin having elasticity, and the rear protrusion engaging portion 41 and the front protrusion engaging at the rear upper surface at a predetermined position on the rear surface of the elasticity adjusting plate 40. A plurality of joint portions 42 are juxtaposed in the left-right direction, the rearward projecting engaging portion 41 forms a rearwardly bulging portion 45 on the upper side, a downward arc engaging surface 46 is provided on the lower surface of the rearwardly bulging portion 45, and forwardly projecting The engagement portion 42 is formed by forming a front bulge portion 50 on the rear side of the downward arc engagement surface 46 of the rearward projecting engagement portion 41 and providing an upward arc engagement surface 51 on the lower surface of the front bulge portion 50. Therefore, when the rear projecting engagement portion 41 and the front projecting engagement portion 42 are inserted into the upper engagement hole 43 and the lower engagement hole 44 of the plate body 31 from the front side, the rear projecting engagement portion 41 and the front projecting engagement The joint portion 42 increases the distance between the rear bulge portion 45 and the front bulge portion 50. While entering the upper engaging hole 43 and the lower engagement hole 44.

進入した後方突出係合部４１の後方膨出部４５と前方突出係合部４２の前方膨出部５０が、下側円弧面４７と上側円弧面５２を乗り越えると、後方突出係合部４１の下向き円弧係合面４６が上側係合孔４３の下側円弧面４７に、前方突出係合部４２の上向き円弧係合面５１が下側係合孔４４の上側円弧面５２に夫々係合する。
そして、上側係合孔４３の下側円弧面４７と下側係合孔４４の上側円弧面５２とは、側面視所定位置に設けた中心Ｇとする同心円と略一致する円弧面となるように形成しているから、後方突出係合部４１および前方突出係合部４２が係合した後に中心Ｇを軸心として弾力調節プレート４０を下方回動させると、弾力調節プレート４０はプレート体３１の前面に重なる。
したがって、後方突出係合部４１と前方突出係合部４２は、プレート体３１の下側円弧面４７と上側円弧面５２を前後から挟持するように位置するから、ワイヤーケーブル５６が弾力調節プレート４０の下部係合部５５を上方に牽引すると、弾力調節プレート４０の後方突出係合部４１および前方突出係合部４２は上方に移動するように力が作用するが、前方突出係合部４２の上向き円弧係合面５１が下側係合孔４４の上側円弧面５２に当たっているので、前方突出係合部４２と下側係合孔４４との係合部分が外れることはなく、弾力調節プレート４０は前方移動する。 When the rear bulging portion 45 of the rear protruding engagement portion 41 that has entered and the front bulging portion 50 of the front protruding engagement portion 42 get over the lower arc surface 47 and the upper arc surface 52, The downward arc engagement surface 46 engages with the lower arc surface 47 of the upper engagement hole 43, and the upward arc engagement surface 51 of the forward projecting engagement portion 42 engages with the upper arc surface 52 of the lower engagement hole 44. .
The lower arc surface 47 of the upper engagement hole 43 and the upper arc surface 52 of the lower engagement hole 44 are arc surfaces that substantially coincide with a concentric circle having a center G provided at a predetermined position in a side view. Therefore, when the elastic adjustment plate 40 is rotated downward about the center G after the rear protrusion engagement portion 41 and the front protrusion engagement portion 42 are engaged, the elasticity adjustment plate 40 is formed on the plate body 31. It overlaps the front.
Accordingly, the rear projecting engagement portion 41 and the front projecting engagement portion 42 are positioned so as to sandwich the lower arc surface 47 and the upper arc surface 52 of the plate body 31 from the front and the rear, so that the wire cable 56 is provided with the elasticity adjusting plate 40. When the lower engaging portion 55 is pulled upward, a force acts so that the rearward projecting engaging portion 41 and the front projecting engaging portion 42 of the elasticity adjusting plate 40 move upward. Since the upward arc engagement surface 51 is in contact with the upper arc surface 52 of the lower engagement hole 44, the engagement portion between the front protrusion engagement portion 42 and the lower engagement hole 44 is not disengaged, and the elasticity adjustment plate 40. Moves forward.

反対に、ワイヤーケーブル５６が緩み、弾力調節プレート４０の下部係合部５５が下方に移動すると、後方突出係合部４１の下向き円弧係合面４６が上側係合孔４３の下側円弧面４７に当たっているので、後方突出係合部４１と後方膨出部４５との係合部分が外れることはなく、弾力調節プレート４０は後方移動する。
このように、弾力調節プレート４０の後方突出係合部４１および前方突出係合部４２は、弾力調節プレート４０の取付を容易にするだけでなく、弾力調節プレート４０の前後移動のときも係合が外れない合理的構成となる。 On the contrary, when the wire cable 56 is loosened and the lower engagement portion 55 of the elasticity adjusting plate 40 is moved downward, the downward arc engagement surface 46 of the rearward projecting engagement portion 41 becomes the lower arc surface 47 of the upper engagement hole 43. Therefore, the engagement portion between the rearward projecting engagement portion 41 and the rear bulge portion 45 is not disengaged, and the elasticity adjusting plate 40 moves rearward.
Thus, the rearward projecting engaging portion 41 and the front projecting engaging portion 42 of the elasticity adjusting plate 40 not only facilitate the attachment of the elasticity adjusting plate 40 but also engage when the elasticity adjusting plate 40 moves back and forth. It is a rational configuration that does not deviate.

しかして、弾力調節プレート４０の下部係合部５５は、プレート体３１の下側開口部６０に嵌合させ、下部係合部５５のケーブル挿入溝５８にワイヤーケーブル５６を直接挿入しているので、ワイヤーケーブル５６の取付に際して、ロッドやブラケットを使用しないですみ、部品点数を減少させ、コストを低くする。
また、弾力調節プレート４０の下部係合部５５とプレート体３１の下側開口部６０との接触部分は、何れも合成樹脂製であるから異音の発生が少ない。
また、弾力調節プレート４０の下部係合部５５はワイヤーケーブル５６により上方に牽引され、弾力調節プレート４０のの前面には背凭シート２のクッション材４があるので、弾力調節プレート４０は前側からクッション材４により押され、後側からワイヤーケーブル５６により引かれて、クッション材４とプレート体３１とにより前後から挟持される。
また、下部係合部５５と下側開口部６０は略同じ左右幅に形成しているので、弾力調節プレート４０が撓むとき、下部係合部５５と下側開口部６０とが互いにガイドのように作用して、弾力調節プレート４０の弾力調節作用を円滑・確実にする。 Therefore, the lower engagement portion 55 of the elasticity adjusting plate 40 is fitted into the lower opening 60 of the plate body 31 and the wire cable 56 is directly inserted into the cable insertion groove 58 of the lower engagement portion 55. When installing the wire cable 56, it is not necessary to use rods or brackets, reducing the number of parts and reducing the cost.
Further, since the contact portion between the lower engaging portion 55 of the elasticity adjusting plate 40 and the lower opening 60 of the plate body 31 is made of synthetic resin, there is little occurrence of abnormal noise.
Further, the lower engagement portion 55 of the elasticity adjusting plate 40 is pulled upward by the wire cable 56, and the cushion material 4 of the dorsal seat 2 is provided on the front surface of the elasticity adjusting plate 40. Therefore, the elasticity adjusting plate 40 is moved from the front side. It is pushed by the cushion material 4, pulled by the wire cable 56 from the rear side, and is sandwiched from the front and rear by the cushion material 4 and the plate body 31.
Further, since the lower engaging portion 55 and the lower opening 60 are formed to have substantially the same left-right width, when the elasticity adjusting plate 40 is bent, the lower engaging portion 55 and the lower opening 60 are mutually guided. Thus, the elasticity adjusting action of the elasticity adjusting plate 40 is made smooth and reliable.

しかして、プレート体３１の左右中央位置にはワイヤーケーブル５６のアウターチューブ６２のチューブ先端６３を係止するチューブ係止部６５を設けているから、ワイヤーケーブル５６のアウターチューブ６２のチューブ先端６３を直接プレート体３１に埋め込むように取付けることができ、プレート体３１および弾力調節プレート４０の操作機構の全体の前後厚さを薄くすることが可能になる。
また、チューブ係止部６５と下部係合部５５とを略同じ前後位置に配置することにより、一層、プレート体３１および弾力調節プレート４０並びに弾力調節プレート４０の操作機構の全体の前後厚さを薄くすることが可能になって、好適である。
また、アウターチューブ６２のチューブ先端６３より引き出されたインナーケーブル５７はプレート体３１に嵌合溝６８に嵌合させているから、ワイヤーケーブル５６の作動を確実にするだけでなく、一層、プレート体３１および弾力調節プレート４０並びに弾力調節プレート４０の操作機構の全体の前後厚さを薄くすることができる。 Since the tube locking portion 65 for locking the tube tip 63 of the outer tube 62 of the wire cable 56 is provided at the left and right center position of the plate body 31, the tube tip 63 of the outer tube 62 of the wire cable 56 is attached. It can be attached so as to be directly embedded in the plate body 31, and it is possible to reduce the thickness of the entire operation mechanism of the plate body 31 and the elasticity adjusting plate 40.
Further, by arranging the tube locking portion 65 and the lower engaging portion 55 at substantially the same front and rear positions, the thickness of the entire plate body 31 and the elasticity adjusting plate 40 and the whole operating mechanism of the elasticity adjusting plate 40 can be reduced. It is possible to reduce the thickness, which is preferable.
Further, since the inner cable 57 drawn from the tube tip 63 of the outer tube 62 is fitted in the fitting groove 68 in the plate body 31, not only the operation of the wire cable 56 is ensured but also the plate body. 31 and the entire thickness of the operating mechanism of the elasticity adjusting plate 40 and the elasticity adjusting plate 40 can be reduced.

しかして、プレート体３１を背凭フレーム３に取付けるワイヤスプリング３２は上下一対設け、ワイヤスプリング３２の内の上側ワイヤスプリング３２Ａはプレート体３１の上縁付近の裏側に取付け、ワイヤスプリング３２の内の下側ワイヤスプリング３２Ｂはプレート体３１の上下中間の所定位置に取付け、合成樹脂製のプレート体３１は金属製の下側ワイヤスプリング３２Ｂより撓むように形成し、下側ワイヤスプリング３２Ｂより下側のプレート体３１の部分は、下側撓み部３３に形成しているから、下側撓み部３３は、着座者が着座して荷重が掛かると、下側ワイヤスプリング３２Ｂ付近を回動中心として後方に折れ曲がるように撓むので、着座フィーリングが向上する。
即ち、プレート体３１が一枚板状の合成樹脂製のため、下側ワイヤスプリング３２Ｂの支持部分に対して下側撓み部３３に荷重が掛かると、下側撓み部３３が後方に撓む。そのため、着座者の背部から腰部は、肩甲骨付近と腰部分が後方に位置しており、特に、腰部分が背凭シート２により前側に押されると、肩甲骨付近の背部は背凭シート２より浮いて着座疲労が増大するが、着座者の腰部が下側撓み部３３に当たったときに、下側撓み部３３が後方に撓むことで背部全体が背凭シート２に密着し、着座疲労を軽減して着座フィーリングを向上させる。 Thus, a pair of upper and lower wire springs 32 for attaching the plate body 31 to the dorsal frame 3 are provided, and the upper wire spring 32A of the wire spring 32 is attached to the back side near the upper edge of the plate body 31. The lower wire spring 32B is attached to a predetermined position between the upper and lower sides of the plate body 31, the synthetic resin plate body 31 is formed so as to bend from the metal lower wire spring 32B, and the plate below the lower wire spring 32B. Since the portion of the body 31 is formed in the lower bending portion 33, the lower bending portion 33 bends backward with the vicinity of the lower wire spring 32B as the center of rotation when a seated person sits and a load is applied. Therefore, the seating feeling is improved.
That is, since the plate body 31 is made of a single plate-like synthetic resin, when a load is applied to the lower bending portion 33 with respect to the support portion of the lower wire spring 32B, the lower bending portion 33 bends backward. Therefore, from the back to the waist of the seated person, the back of the scapula is located near the scapula and the back of the scapula. Although the seating fatigue is increased by floating more, when the seated person's waist hits the lower bending portion 33, the lower bending portion 33 bends backward so that the entire back portion is closely attached to the dorsal seat 2, Reduces fatigue and improves seating feeling.

この場合、弾力調節プレート４０は、ワイヤーケーブル５６が下部係合部５５を上方に牽引すれば前方移動するので、下側撓み部３３が後方に撓んでも、下部係合部５５とチューブ係止部６５との間隔を同じにすれば、弾力調節プレート４０の前方移動量は変化せず、前方に移動する弾力調節プレート４０と後方に撓むプレート体３１の下側撓み部３３とは、相反する移動方向でありながら、両立させることができ、頗る良好な着座フィーリングの車両用シート１を提供する。
また、下側ワイヤスプリング３２Ｂは着座者の荷重を支持する剛性を有して形成し、これに対して、下側撓み部３３は着座者の荷重により撓む弾性を有するように形成しているから、着座者の荷重が掛かると下側ワイヤスプリング３２Ｂの付近を支点に下側撓み部３３は後方に撓む。
したがって、着座者の荷重の程度により撓み量は変化する。
また、下側ワイヤスプリング３２Ｂは剛性を有して形成し、前記下側撓み部３３は弾性を有するように形成しているから、プレート体３１は、着座者の荷重により下側撓み部３３が後方に撓むと、この状態の面形状を保持したままでプレート体３１全体が後方移動する。 In this case, since the elasticity adjusting plate 40 moves forward if the wire cable 56 pulls the lower engaging portion 55 upward, even if the lower bending portion 33 is bent rearward, the lower engaging portion 55 and the tube are locked. If the distance from the portion 65 is the same, the amount of forward movement of the elasticity adjusting plate 40 does not change, and the elasticity adjusting plate 40 that moves forward and the lower bending portion 33 of the plate body 31 that flexes backward are in conflict. A vehicle seat 1 having a good seating feeling that can be made compatible while being in the moving direction is provided.
Further, the lower wire spring 32B is formed to have rigidity to support the load of the seated person, while the lower bending portion 33 is formed to have elasticity that is bent by the load of the seated person. Therefore, when a seated person's load is applied, the lower bending portion 33 bends backward with the vicinity of the lower wire spring 32B as a fulcrum.
Therefore, the amount of deflection changes depending on the degree of load of the seated person.
Further, since the lower wire spring 32B is formed with rigidity and the lower bending portion 33 is formed so as to have elasticity, the plate body 31 has the lower bending portion 33 formed by the load of the seated person. When bent backward, the entire plate body 31 moves backward while maintaining the surface shape in this state.

しかして、前記下側ワイヤスプリング３２Ｂの左右中間部分には平面視前方に突き出る中間屈曲部３２Ｃを形成し、該中間屈曲部３２Ｃはプレート体３１に形成した係合孔３２Ｄに係合させているから、中間屈曲部３２Ｃと係合孔３２Ｄは、下側ワイヤスプリング３２Ｂとプレート体３１との上下左右の位置ずれを防止すると共に、係合孔３２Ｄによりプレート体３１の剛性を低くし、中間屈曲部３２Ｃが下側撓み部３３の後方に撓む支点となる作用も期待する。   Thus, an intermediate bent portion 32C protruding forward in plan view is formed in the left and right intermediate portion of the lower wire spring 32B, and the intermediate bent portion 32C is engaged with an engagement hole 32D formed in the plate body 31. Thus, the intermediate bent portion 32C and the engagement hole 32D prevent vertical and horizontal misalignment between the lower wire spring 32B and the plate body 31, and lower the rigidity of the plate body 31 by the engagement hole 32D. The effect | action used as the fulcrum which the part 32C bends behind the lower side bending part 33 is also anticipated.

しかして、下側撓み部３３は、着座者の荷重の程度により撓み量は変化するが、下側撓み部３３の裏側にはサポートバネ８６を設けているから、サポートバネ８６の線経および材質等を変更することにより、下側撓み部３３の撓み量を容易に設定可能となる。
しかして、弾力調節プレート４０の所定部分は押出面部７０に形成し、弾力調節プレート４０が撓むとき押出面部７０が弾性変形して前方に突き出るように構成しているから、弾力調節プレート４０を上下に撓ませたとき、常に、押出面部７０の部分が前方に移動するので、着座者を押す弾力を調節できる位置が変わらず、着座感を良好にする。
この場合、押出面部７０の位置は、弾力調節プレート４０の上縁と下縁との略上下中間より下方であって、弾力調節プレート４０の上縁と押出面部７０との間隔Ｋよりも押出面部７０と下縁との間隔Ｌの方が短くなるように構成し、該弾力調節プレート４０はその上部をプレート体３１に位置固定状態に、その下部の下部係合部５５をプレート体３１に上下自在に取付けているから、弾力調節プレート４０は、下部係合部５５を上動させて押出面部７０を前方移動させることができ、そのため、押出面部７０の回動支点は弾力調節プレート４０の上縁付近となり、押出面部７０が最も後側のときの高さ位置と最も前側での高さ位置との差を可及的に小さくする。 Thus, although the amount of bending of the lower bending portion 33 varies depending on the load of the seated person, a support spring 86 is provided on the back side of the lower bending portion 33. By changing the above, the amount of bending of the lower bending portion 33 can be easily set.
Accordingly, the predetermined portion of the elasticity adjusting plate 40 is formed on the extrusion surface portion 70, and when the elasticity adjustment plate 40 is bent, the extrusion surface portion 70 is elastically deformed and protrudes forward. When bent up and down, the portion of the pushing surface portion 70 always moves forward, so that the position where the elasticity for pushing the seated person can be adjusted does not change, and the seating feeling is improved.
In this case, the position of the extrusion surface portion 70 is lower than the substantially vertical middle between the upper edge and the lower edge of the elasticity adjusting plate 40 and is more than the distance K between the upper edge of the elasticity adjustment plate 40 and the extrusion surface portion 70. The elasticity adjustment plate 40 is configured such that the upper portion of the elasticity adjusting plate 40 is fixed to the plate body 31 and the lower engaging portion 55 of the lower portion is vertically moved to the plate body 31. Since the elastic adjustment plate 40 can be freely attached, the lower engaging portion 55 can be moved upward to move the push-out surface portion 70 forward. Therefore, the rotation fulcrum of the push-out surface portion 70 is located on the elastic force adjustment plate 40. Near the edge, the difference between the height position when the extrusion surface portion 70 is the rearmost side and the height position of the frontmost side is made as small as possible.

即ち、弾力調節プレート４０は、下部係合部５５を上方移動させて押出面部７０を前方移動させると共に、後方突出係合部４１と押出面部７０との間隔Ｋよりも押出面部７０と下部係合部５５との間隔Ｌの方が短くなるように構成することにより、弾力調節プレート４０の撓みによる押出面部７０の前後移動の際の上下位置の変動を抑制する。   That is, the elasticity adjusting plate 40 moves the lower engagement portion 55 upward to move the extrusion surface portion 70 forward, and also engages the extrusion surface portion 70 and the lower engagement portion more than the distance K between the rearward projecting engagement portion 41 and the extrusion surface portion 70. By configuring the distance L with the portion 55 to be shorter, fluctuations in the vertical position when the push-out surface portion 70 moves back and forth due to the bending of the elasticity adjusting plate 40 are suppressed.

背凭シートおよびヘッドレストの斜視図。The perspective view of a dorsal fin seat and a headrest. 背凭シートフレーム側面図。FIG. 分解状態斜視図（プレート体と弾力調節プレートは省略）。Disassembled perspective view (plate body and elasticity adjusting plate omitted). 背凭シートフレームの斜視図（プレート体と弾力調節プレートは省略） 。A perspective view of the dorsal seat frame (plate body and elasticity adjusting plate are omitted). 背凭シートフレームの斜視図。The perspective view of a dorsal fin seat frame. プレート体と弾力調節プレートの取付け状態概略斜視図。The attachment state schematic perspective view of a plate body and an elasticity adjustment plate. プレート体と弾力調節プレートの側面図。The side view of a plate body and an elasticity adjustment plate. 弾力調節プレートの係合部の斜視図。The perspective view of the engaging part of an elasticity adjustment plate. 弾力調節プレートをプレート体に取付ける状態の側面図。The side view of the state which attaches an elasticity adjustment plate to a plate body. 弾力調節プレートの係合部を係合孔に係合させた状態図。The state figure which engaged the engagement part of the elasticity adjustment plate to the engagement hole. 弾力調節プレートを回動させた側面図。The side view which rotated the elasticity adjustment plate. 弾力調節プレートを回動させた側面図。The side view which rotated the elasticity adjustment plate. プレート体の一部縦断側面図。The partial vertical side view of a plate body. 弾力調節プレートの一部縦断側面図。The partial vertical side view of a resilience adjustment plate. 弾力調節プレートの下部係合部部分の断面図。Sectional drawing of the lower engaging part part of an elasticity adjustment plate. 弾力調節プレートの下部係合部部分の斜視図。The perspective view of the lower engaging part part of an elasticity adjustment plate. 着座前の弾力調節プレートとプレート体との位置関係図。The positional relationship figure of the elasticity adjustment plate before seating and a plate body. 下側撓み部が撓んだ状態の一例を示す位置関係図。The positional relationship figure which shows an example of the state which the lower side bending part bent. 弾力調節プレートが前方に突き出た状態の一例を示す位置関係図。The positional relationship figure which shows an example of the state which the elasticity adjustment plate protruded ahead. 弾力調節プレートが前方に突き出て下側撓み部が撓んだ状態の一例を示す位置関係図。The positional relationship figure which shows an example of the state which the elasticity adjustment plate protruded ahead and the lower side bending part bent. 押出面部の上下移動を説明する概略図。Schematic explaining the vertical movement of an extrusion surface part. 先願の課題を示す概略図。Schematic which shows the subject of a prior application. 押出面部の実施例の斜視図。The perspective view of the Example of an extrusion surface part. 押出面部の他の実施例の斜視図。The perspective view of the other Example of an extrusion surface part. 押出面部の他の実施例の斜視図。The perspective view of the other Example of an extrusion surface part. 押出面部の他の実施例の斜視図。The perspective view of the other Example of an extrusion surface part.

符号の説明Explanation of symbols

１…車両用シート、２…背凭シート、３…背凭フレーム、４…クッション材、５…表皮部材、６…ヘッドレスト、８…ピラー、１０…ヘッドレスト取付用杆、１１…ピラー支持部材、１５…上側リンク杆、１６…回動軸、１７…側部フレーム、２０…伝動部材、２１…軸、２２…上リンクアーム部、２３…下リンクアーム部、２５…後突感知体、２６…下側リンク、２７…取付軸、２８…回動軸、２９…軸、３０…板状支持材、３１…プレート体、３２…ワイヤスプリング、４０…弾力調節プレート、４１…後方突出係合部、４２…前方突出係合部、４３…上側係合孔、４４…下側係合孔、４５…後方膨出部、４６…下向き円弧係合面、４７…下側円弧面、５０…前方膨出部、５１…上向き円弧係合面、５２…上側円弧面、５５…下部係合部、５６…ワイヤーケーブル、５７…インナーケーブル、６１…ケーブル先端係合体、５８…ケーブル挿入溝、６０…下側開口部、６２…アウターチューブ、６３…チューブ先端、６５…チューブ係止部、６６…腕部、６７…上側開口部、６８…嵌合溝、７０…押出面部…、７１…溝また…スリット、７２…薄肉部、７３…孔、７４…切欠部。 DESCRIPTION OF SYMBOLS 1 ... Vehicle seat, 2 ... Backrest seat, 3 ... Backrest frame, 4 ... Cushion material, 5 ... Skin member, 6 ... Headrest, 8 ... Pillar, 10 ... Headrest mounting collar, 11 ... Pillar support member, 15 ... Upper link rod, 16 ... Rotating shaft, 17 ... Side frame, 20 ... Transmission member, 21 ... Shaft, 22 ... Upper link arm, 23 ... Lower link arm, 25 ... Rear collision detector, 26 ... Lower Side link 27 ... Mounting shaft 28 ... Rotating shaft 29 ... Shaft 30 ... Plate-like support material 31 ... Plate body 32 ... Wire spring 40 ... Elasticity adjusting plate 41 ... Backward projecting engagement portion 42 ... forward projecting engaging part, 43 ... upper engaging hole, 44 ... lower engaging hole, 45 ... rear bulging part, 46 ... downward arc engaging surface, 47 ... lower arc surface, 50 ... forward bulging part 51 ... Upward arc engaging surface, 52 ... Upper arc surface, 55 ... Lower engaging portion 56 ... Wire cable, 57 ... Inner cable, 61 ... Cable tip engagement body, 58 ... Cable insertion groove, 60 ... Lower opening, 62 ... Outer tube, 63 ... Tube tip, 65 ... Tube locking part, 66 ... Arm , 67 ... upper opening, 68 ... fitting groove, 70 ... extruded surface part ..., 71 ... groove or ... slit, 72 ... thin-walled part, 73 ... hole, 74 ... notch part .

Claims (5)

背凭シート２の背凭フレーム３に、着座者の背部を支持しうる合成樹脂製の一枚板形状のプレート体３１を、ワイヤスプリング３２を介して前記背凭フレーム３に対して前後移動自在に取付け、前記プレート体３１には、該プレート体３１に対して前後するように弾性を有する一枚板状の弾力調節プレート４０を設け、前記弾力調節プレート４０の所定部分は該弾力調節プレート４０の上縁側と下縁側との間隔を、下縁側を上動させて狭くしたとき前方に突き出る押出面部７０に形成し、該押出面部７０付近の弾力調節プレート４０を前後移動させて該弾力調節プレート４０の着座者の身体の支持弾力を調節しうるように構成し、前記押出面部７０の位置は、弾力調節プレート４０の上縁側と下縁側との上下略中間より下方に位置するように構成した車両用シート。 A single plate-like plate body 31 made of synthetic resin capable of supporting the back of the seated person is movable back and forth with respect to the dorsal frame 3 via a wire spring 32 on the dorsal frame 3 of the dorsal seat 2. The plate body 31 is provided with a single plate-like elasticity adjusting plate 40 having elasticity so as to move back and forth with respect to the plate body 31, and a predetermined portion of the elasticity adjusting plate 40 is the elasticity adjusting plate 40. An interval between the upper edge side and the lower edge side is formed on the extruded surface portion 70 that protrudes forward when the lower edge side is moved upward to narrow, and the elasticity adjusting plate 40 in the vicinity of the extruded surface portion 70 is moved back and forth to move the elasticity adjusting plate. 40 so that the support elasticity of the body of the seated person can be adjusted, and the position of the push-out surface portion 70 is positioned below the middle of the upper and lower edges of the elasticity adjusting plate 40. Form sheet for the vehicle. 請求項１において、前記押出面部７０と弾力調節プレート４０の上縁との間隔Ｋよりも押出面部７０と弾力調節プレート４０の下縁との間隔Ｌの方が短くなるように構成した車両用シート。 The vehicle seat according to claim 1, wherein a distance L between the extrusion surface portion 70 and the lower edge of the elasticity adjusting plate 40 is shorter than a distance K between the extrusion surface portion 70 and the upper edge of the elasticity adjustment plate 40. . 請求項２において、前記弾力調節プレート４０は、その上部をプレート体３１に位置固定状態に、その下部の下部係合部５５をプレート体３１に上下自在に取付けて、前記下部係合部５５を上動させて押出面部７０を前方移動させるように構成した車両用シート。 3. The elasticity adjusting plate 40 according to claim 2, wherein the upper portion of the elasticity adjusting plate 40 is fixed to the plate body 31 and the lower engaging portion 55 is attached to the plate body 31 so as to be vertically movable. A vehicle seat configured to move upward and move the extrusion surface portion 70 forward. 請求項１または請求項２または請求項３において、前記押出面部７０は、溝またはスリット７１や、他の弾力調節プレート４０の部分に比し若干肉厚を薄くした薄肉部７２や、孔７３の内の何れか一つあるいは複数を組合せて構成した車両用シート。 In claim 1, claim 2, or claim 3, the extrusion surface portion 70 includes a groove or slit 71, a thin portion 72 that is slightly thinner than the portion of the other elasticity adjusting plate 40, and a hole 73. A vehicle seat configured by combining any one or more of them. 請求項１または請求項２または請求項３において、前記押出面部７０は、前記弾力調節プレート４０の外縁所定部分を切り欠いた切欠部７４により弾力調節プレート４０の上縁側と下縁側との間隔を狭くしたとき前方に突き出るように構成した車両用シート。 In claim 1, claim 2, or claim 3, the push-out surface portion 70 has an interval between the upper edge side and the lower edge side of the elasticity adjusting plate 40 by a notch 74 that is formed by notching a predetermined portion of the outer edge of the elasticity adjusting plate 40. A vehicle seat configured to protrude forward when narrowed.
JP2006124541A 2006-04-27 2006-04-27 Vehicle seat Expired - Fee Related JP4863362B2 (en)

Priority Applications (4)

Application Number Priority Date Filing Date Title
JP2006124541A JP4863362B2 (en) 2006-04-27 2006-04-27 Vehicle seat
EP07742705.2A EP2016867B1 (en) 2006-04-27 2007-04-27 Vehicle seat
PCT/JP2007/059270 WO2007126089A1 (en) 2006-04-27 2007-04-27 Vehicle seat
US12/298,760 US8235467B2 (en) 2006-04-27 2007-04-27 Vehicle seat

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JP2017533035A (en) * 2014-10-28 2017-11-09 ジェンサーム オートモーティブ システムズ チャイナリミテッド Lumber spacer

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JP5823820B2 (en) * 2011-10-28 2015-11-25 株式会社岡村製作所 Chair

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JP2505445Y2 (en) * 1990-02-23 1996-07-31 株式会社大井製作所 Door lock half latch and full latch detection device
EP1110809B1 (en) * 1999-12-23 2006-05-17 Recaro GmbH & Co. KG Vehicle seat, especially motor vehicle seat
JP4442876B2 (en) * 2004-07-06 2010-03-31 テイ・エス テック株式会社 Vehicle seat

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* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JP2017533035A (en) * 2014-10-28 2017-11-09 ジェンサーム オートモーティブ システムズ チャイナリミテッド Lumber spacer
US10384575B2 (en) 2014-10-28 2019-08-20 Gentherm Automotive Systems (China) Ltd. Lumbar spacer

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