JP2011020659A - Vehicle seat - Google Patents

Vehicle seat Download PDF

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JP2011020659A
JP2011020659A JP2009169973A JP2009169973A JP2011020659A JP 2011020659 A JP2011020659 A JP 2011020659A JP 2009169973 A JP2009169973 A JP 2009169973A JP 2009169973 A JP2009169973 A JP 2009169973A JP 2011020659 A JP2011020659 A JP 2011020659A
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receiving member
pressure receiving
vehicle
seat back
back frame
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JP5489565B2 (en
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Takahiro Mitsui
隆浩 三井
Masahiko Yamamoto
雅彦 山本
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TS Tech Co Ltd
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TS Tech Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat which has a simple mechanism and the small number of components, can be reduced size and weight, and promptly operate at the application of a shock load of a certain level or higher to secure the backward sinking of the upper body of an occupant, and can effectively reduce a whiplash injury value of the occupant. <P>SOLUTION: The vehicle seat S includes: a seat back frame F at least having a side 10 and an upper portion 20; a headrest S3; a pressure bearing member 40 comprising a leaf spring movable independently of the headrest S3; and connecting members 50, 60 which connect the pressure bearing member 40 with the side 10 while holding the pressure bearing member using holding parts 53, 63 disposed separately at least at two locations. The pressure bearing member 40 is formed to be longer than a distance between the separately disposed holding parts 53, 63 and held by the holding parts 53, 63 so as to be expanded to the front side of a vehicle although its expanding direction is changed to the rear side of the vehicle according to the shock load at the certain level or higher. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

本発明は、乗物用シートに係り、特に後面衝突時に乗員の頸部傷害値を低減させることのできる乗物用シートに関する。   The present invention relates to a vehicle seat, and more particularly, to a vehicle seat that can reduce an occupant's neck injury value at the time of a rear collision.

一般に、自動車などの乗物の後部が追突されたり、後退走行時に大きく衝突したりするなど、いわゆる後面衝突の際には、着座している乗員の頭部が慣性力によって急激に後傾し、頸部が衝撃を受ける虞がある。   In general, in the case of a so-called rear collision, such as when the rear part of a vehicle such as an automobile is bumped into the rear or makes a large collision when traveling backward, the head of the seated occupant suddenly tilts backward due to inertial force, There is a risk that the part will be impacted.

そのため、従来から自動車などの乗物用シートには、後面衝突による衝撃から乗員の頭部や頸部を保護し、頸部傷害値を低減するために、シートバック上方に乗員の頭部を後方から受けるヘッドレストを設けている。   For this reason, conventionally, a vehicle seat such as an automobile has been used to protect the occupant's head and neck from impacts caused by a rear-end collision and reduce the cervical injury value from the rear of the occupant's head above the seat back. A headrest is provided.

しかし、ヘッドレストを設けているだけでは、身体への衝撃を軽減できないだけでなく、後面衝突時に乗員の頭部とヘッドレストとの間の隙間を速やかに減少させないと、乗員の頸部傷害値を十分に低減できない場合がある。   However, the provision of a headrest not only reduces the impact on the body. In some cases, it cannot be reduced.

このような問題を解消するために、後面衝突時に乗員の後方への移動荷重によってヘッドレストを前方に移動させ、乗員の頭部を支持して頸部傷害値を低減するようにした技術が提案されている(例えば、特許文献1参照)。   In order to solve such a problem, a technique has been proposed in which the headrest is moved forward by a moving load to the rear of the occupant at the time of a rear collision and the cervical injury value is reduced by supporting the occupant's head. (For example, refer to Patent Document 1).

また、後面衝突時にヘッドレストを前方へ移動させ、乗員の頭部を支持して頸部傷害値を低減する技術に加えて、ランバーサポート機能を有するクッション支持機構を設けた技術も提案されている(例えば、特許文献2参照)。   In addition to a technique for moving the headrest forward during a rear-end collision and supporting the head of the occupant to reduce the neck injury value, a technique provided with a cushion support mechanism having a lumbar support function has also been proposed ( For example, see Patent Document 2).

特開2005−028956号公報(段落0039〜0046、図7)JP 2005-028956 A (paragraphs 0039-0046, FIG. 7) 特開2006−341804号公報(段落0016〜0019、図2)JP 2006-341804 A (paragraphs 0016 to 0019, FIG. 2)

特許文献1で開示される技術は、シートバックの背中部分(特許文献1では「胸部」としている)が当接する部位のばね係数を小さくすることで、上半身の後方移動を大きくして頭部と背中部分の相対移動量を小さくするとともに、低反発クッション材を用いて減衰係数を大きくすることで、上半身の跳ね返りを抑制して頭部と背中部分の相対速度を低減することにより、乗員の頸部傷害値の低減を図っている。   The technique disclosed in Patent Document 1 is to increase the rearward movement of the upper body by reducing the spring coefficient of the portion where the back portion of the seat back (referred to as “chest” in Patent Document 1) abuts. By reducing the relative movement of the back part and increasing the damping coefficient using low-elasticity cushioning material, the rebound of the upper body is suppressed and the relative speed between the head and the back part is reduced. To reduce the injury value.

特許文献2で開示される技術は、後面衝突時に乗員の後方移動を感知する後突感知体とは別体のクッション支持機構を設け、このクッション支持機構のサポート部を弾性変形により上下に伸縮させ、クッション材の前方への押出を調整可能に構成したものである。   The technology disclosed in Patent Document 2 is provided with a cushion support mechanism that is separate from the rear impact detection body that senses the rearward movement of the occupant during a rear collision, and the support portion of this cushion support mechanism is vertically expanded and contracted by elastic deformation. In this configuration, the forward extrusion of the cushion material can be adjusted.

しかし、上述のように特許文献1及び特許文献2で示される技術は、いずれも後面衝突時にヘッドレストを前方へ移動させて乗員の頭部を支持し、頸部傷害値を低減させるものであるため、ヘッドレストを前方移動させるための機構として、乗員の後方移動による荷重を受けて作動する部材を設け、この部材とヘッドレストを連動して作動させる機構を設けている。したがって、機構が複雑になり、また装置が全体的に大きくなるため、シートの軽量化が困難であるという不都合があった。   However, as described above, the techniques shown in Patent Document 1 and Patent Document 2 both reduce the cervical injury value by supporting the occupant's head by moving the headrest forward during a rear collision. As a mechanism for moving the headrest forward, a member that operates in response to a load caused by the rearward movement of the occupant is provided, and a mechanism that operates the member and the headrest in conjunction with each other is provided. Therefore, the mechanism becomes complicated and the apparatus becomes larger as a whole, and there is a disadvantage that it is difficult to reduce the weight of the seat.

また、このような頸部傷害値低減シートにおいて、通常の着座時の着座感を向上させるためにランバーサポート機能を設けることが望まれているが、特許文献2の技術では、上記のとおり、ランバーサポート機能を別に設けているため、機構が複雑になるだけでなく、部品点数が増加するという不都合があった。   In addition, in such a neck injury value reduction sheet, it is desired to provide a lumbar support function in order to improve the seating feeling during normal seating. Since the support function is provided separately, not only the mechanism is complicated but also the number of parts is increased.

本発明の目的は、機構が簡単で、部品点数が少なく、小型化且つ軽量化が可能であって、一定以上の衝撃荷重が加わったときに迅速に作動し、乗員の上体の後方への沈み込みを確保して乗員の頸部傷害値を効果的に低減できる乗物用シートを提供することにある。
また、本発明の他の目的は、頸部傷害値低減機能とランバーサポート機能の両方を備えつつ、簡単な機構で、部品点数が少なく、小型化且つ軽量化が可能な乗物用シートを提供することにある。
The object of the present invention is that the mechanism is simple, the number of parts is small, the size and the weight can be reduced, the actuator operates quickly when an impact load of a certain level or more is applied, and the rear of the occupant's upper body An object of the present invention is to provide a vehicle seat that can ensure sinking and effectively reduce the cervical injury value of an occupant.
Another object of the present invention is to provide a vehicle seat that has both a neck injury value reduction function and a lumbar support function, has a simple mechanism, has a small number of parts, and can be reduced in size and weight. There is.

前記課題は、請求項1の乗物用シートによれば、両側に位置するサイド部及び上方に配設されたアッパー部を少なくとも備えたシートバックフレームと、該シートバックフレームの上方に配設されるヘッドレストと、該ヘッドレストと独立して可動する板ばねからなる受圧部材と、少なくとも2箇所に離間して設けられた保持部で前記受圧部材を保持して前記シートバックフレームのサイド部と連結する連結部材と、を備え、前記受圧部材は、前記離間して設けられた保持部の距離より長く形成されて、乗物前方側に膨出して前記保持部に保持され、一定以上の衝撃荷重によって膨出方向が乗物後方側になること、により解決される。   According to the vehicle seat of claim 1, the subject is provided with a seat back frame having at least side portions located on both sides and an upper portion disposed above, and disposed above the seat back frame. A headrest, a pressure-receiving member made of a leaf spring that can move independently of the headrest, and a connection that holds the pressure-receiving member by at least two holding portions that are separated from each other and connects to the side portion of the seat back frame The pressure receiving member is formed longer than the distance between the spaced apart holding portions, and bulges forward of the vehicle and held by the holding portion, and bulges by a certain or more impact load. It is solved by the direction being on the vehicle rear side.

このように、連結部材は、少なくとも2箇所に離間して設けられた保持部で受圧部材を保持してシートバックフレームのサイド部と受圧部材を連結し、受圧部材は、板ばねからなり、離間して設けられた保持部の距離より長く形成されて、乗物前方側に膨出して保持され、一定以上の衝撃荷重によって膨出方向が乗物後方側になるように構成されているので、板ばねのばね力を利用することで、一定の荷重を超えた時点で、受圧部材が乗物前方側へ凸状に膨出している形状から乗物後方側へ凸状に膨出する形状に変形して、その支持面が後方へすばやく移動する。したがって、乗員の頭部の移動量に対して上体の移動量が追従できるように、乗員の上体をすばやくシートバックへ沈み込ませることができ、また沈み込み量を従来のものよりも大きく確保することができる。このようにして乗員の頭部をヘッドレストに速やかに近づけてヘッドレストで乗員の頭部を支持し、頸部傷害値を効果的に低減することができる。   As described above, the connecting member holds the pressure receiving member with the holding portions that are separated from each other at least two places to connect the side portion of the seat back frame and the pressure receiving member, and the pressure receiving member includes the leaf spring and is separated. The plate spring is formed so as to be longer than the distance of the holding portion provided and is bulged and held on the front side of the vehicle, and the bulging direction becomes the rear side of the vehicle due to an impact load of a certain level or more. By using this spring force, when a certain load is exceeded, the pressure receiving member is deformed from a shape bulging convexly toward the vehicle front side to a shape bulging convexly toward the vehicle rear side, The support surface moves quickly backwards. Therefore, the upper body of the occupant can be quickly sunk into the seat back so that the amount of movement of the upper body can follow the amount of movement of the head of the occupant. Can be secured. In this way, the occupant's head can be quickly brought close to the headrest to support the occupant's head with the headrest, and the neck injury value can be effectively reduced.

また、受圧部材は前記ヘッドレストと独立して可動する板ばねからなり、一定以上の衝撃荷重によって膨出方向が乗物前方側から後方側に膨出するよう変形することで乗員の上体のシートバックへの沈み込み量を確保できるので、機構が簡単であり、頸部傷害値低減のための機構及びシート全体の小型化且つ軽量化が可能となる。   The pressure receiving member is a leaf spring that is movable independently of the headrest, and is deformed so that the bulging direction bulges from the front side of the vehicle to the rear side due to an impact load of a certain level or more. Therefore, the mechanism is simple and the mechanism for reducing the neck injury value and the entire seat can be reduced in size and weight.

また、前記課題は、請求項2の乗物用シートによれば、両側に位置するサイド部及び上方に配設されたアッパー部を少なくとも備えたシートバックフレームと、該シートバックフレームの上方に配設されるヘッドレストと、該ヘッドレストと独立して可動する板ばねからなる受圧部材と、少なくとも2箇所に離間して設けられた保持部で前記受圧部材を保持して前記シートバックフレームのサイド部と連結する連結部材と、を備え、前記受圧部材は、前記離間して設けられた保持部の距離より長く形成されて、乗物前方側に膨出して前記保持部に保持され、一定以上の衝撃荷重によって膨出方向が乗物後方側になり、前記連結部材の少なくとも一つが、前記サイド部との連結位置で移動可能に連結され、前記連結部材が移動して前記受圧部材の膨出量を調整可能としていること、により解決される。   According to the vehicle seat of claim 2, the subject is a seat back frame having at least side portions located on both sides and an upper portion disposed above, and disposed above the seat back frame. Connected to the side part of the seat back frame by holding the pressure receiving member with a holding part provided at least at two positions, and a pressure receiving member comprising a leaf spring that is movable independently of the headrest. The pressure receiving member is formed to be longer than the distance between the spaced apart holding portions, and bulges toward the front of the vehicle and is held by the holding portion. The bulging direction is the vehicle rear side, and at least one of the connecting members is movably connected at a connecting position with the side portion, and the connecting member moves to move the pressure receiving member. It is possible to adjust the protruding amount is solved by.

このように、受圧部材とサイド部とを連結する連結部材の少なくとも一つが、サイド部との連結位置で移動可能に連結され、連結部材を移動させて受圧部材の膨出量を調整することが可能であるので、請求項1の乗物用シートと同様の頸部傷害値低減のための機構を備えると共に、頸部傷害値低減のための機構で用いた受圧部材と同一の部材を用いてランバーサポート機能を提供することができる。したがって、簡単な機構を用いて、且つ少ない部品点数で、頸部傷害値低減の機構と可動式ランバーサポート機能との両方を備えた乗物用シートが提供可能となる。   Thus, at least one of the connecting members that connect the pressure receiving member and the side portion is connected to be movable at the connecting position with the side portion, and the connecting member is moved to adjust the bulging amount of the pressure receiving member. Since it is possible, the same lumbar injury value reduction mechanism as that of the vehicle seat of claim 1 is provided, and the same lumbar member as the pressure receiving member used in the cervical injury value reduction mechanism is used. Support functions can be provided. Therefore, it is possible to provide a vehicle seat that includes both a mechanism for reducing a neck injury value and a movable lumbar support function using a simple mechanism and a small number of parts.

請求項3のように、前記連結部材の保持部は、前記シートバックフレームの上下方向に離間して設けられ前記サイド部と連結されていると、連結部材でシートバックのクッションパッドをより安定して支持でき、通常の着座時には乗員の上体を支持し、後面衝突時には乗員の上体を確実に沈み込ませることができる。   According to a third aspect of the present invention, when the holding portion of the connecting member is provided spaced apart in the vertical direction of the seat back frame and is connected to the side portion, the connecting member makes the cushion pad of the seat back more stable. The upper body of the occupant can be supported during normal seating, and the upper body of the occupant can be reliably depressed during a rear collision.

また、請求項4のように、前記連結部材の保持部は、それぞれ前記シートバックフレームの両側のサイド部に沿って設けられ前記サイド部と連結されるように構成することもできる。このようにすると、連結部材の保持部がシートバックフレームの内側を横断しない構成が可能となり、乗員の沈み込みを大きくすることが可能である。   Further, according to a fourth aspect of the present invention, the holding portions of the connecting member can be configured to be provided along the side portions on both sides of the seat back frame and connected to the side portions. If it does in this way, the structure which the holding | maintenance part of a connection member does not cross the inner side of a seat back frame will become possible, and it can enlarge a passenger | crew's sinking.

なお、請求項5のように、前記連結部材は、前記離間して設けられた保持部を結ぶ仮想線に対する垂直方向を軸として回動可能に形成されていると好適である。
このように連結部材を離間して設けられた保持部を結ぶ仮想線に対する垂直方向を軸として回動可能に形成すると、受圧部材に一定以上の衝撃荷重が加わって乗物後方側に膨出するときに連結部材が同時に後方に回動するため、受圧部材が後方に回動しやすくなり、後面衝突乗時の受圧部材の動きがスムーズになる。
According to a fifth aspect of the present invention, it is preferable that the connecting member is formed so as to be rotatable about a direction perpendicular to an imaginary line connecting the spaced apart holding portions.
When the connecting member is formed so as to be pivotable about the direction perpendicular to the imaginary line connecting the holding portions provided apart from each other, when a certain impact load is applied to the pressure receiving member and it bulges to the vehicle rear side In addition, since the connecting member simultaneously rotates backward, the pressure receiving member easily rotates backward, and the movement of the pressure receiving member during the rear collision is smooth.

具体的には、請求項6のように、前記連結部材は、内筒と外筒とから形成され、何れか一方の筒が前記受圧部材を保持し、他方の筒が前記サイド部と連結され、前記受圧部材を保持する筒が前記サイド部と連結される筒に対して回動することで、回動可能に形成することができる。   Specifically, as in claim 6, the connecting member is formed of an inner cylinder and an outer cylinder, one of the cylinders holds the pressure receiving member, and the other cylinder is connected to the side portion. The cylinder holding the pressure receiving member can be formed to be rotatable by rotating with respect to the cylinder connected to the side portion.

このとき、請求項7のように、前記外筒には回動方向に所定の長さの溝が形成され、前記内筒には前記溝に案内されるストッパが形成され、前記受圧部材を保持する筒が前記溝の長さの範囲で回動可能に形成されていると、ストッパが溝の端部に当接して回動が阻止され、乗物前方側への膨脹時と乗物後方側への膨脹時のそれぞれでばねのテンションがかかり、受圧部材の凸形状が維持される。   At this time, as described in claim 7, the outer cylinder is formed with a groove having a predetermined length in the rotation direction, and the inner cylinder is formed with a stopper guided by the groove to hold the pressure receiving member. If the cylinder to be rotated is formed so as to be rotatable within the length of the groove, the stopper abuts against the end of the groove to prevent the rotation, and when the cylinder is expanded toward the vehicle front side and toward the vehicle rear side. The spring tension is applied at each time of expansion, and the convex shape of the pressure receiving member is maintained.

請求項1の乗物用シートによれば、板ばねのばね力を利用することで、一定の荷重を超えた時点で、受圧部材が乗物前方側へ凸状に膨出している形状から乗物後方側へ凸状に膨出する形状に変形して、その支持面が後方へすばやく移動し、乗員の上体のシートバックへの沈み込み量を従来のものよりも大きく確保することができるので、乗員の頭部をヘッドレストに速やかに近づけてヘッドレストで乗員の頭部を支持し、頸部傷害値を効果的に低減することができる。また、機構が簡単であり、頸部傷害値低減のための機構及びシート全体の小型化且つ軽量化が可能となる。
請求項2の乗物用シートによれば、請求項1の乗物用シートと同様の頸部傷害値低減のための機構を備えると共に、頸部傷害値低減のための機構で用いた受圧部材と同一の部材を用いてランバーサポート機能を提供することができる。よって、簡単な機構を用いて、且つ少ない部品点数で、頸部傷害値低減の機構と可動式ランバーサポート機能との両方を備えた乗物用シートが提供可能となる。
請求項3の乗物用シートによれば、連結部材でシートバックのクッションパッドをより安定して支持でき、通常の着座時は乗員の上体を支持し、後面衝突時は乗員の上体を確実に沈み込ませることができる。
請求項4の乗物用シートによれば、連結部材の保持部がシートバックフレームの内側を横断しない構成が可能となり、乗員の沈み込みを大きくすることが可能である。
請求項5及び請求項6の乗物用シートによれば、受圧部材に一定以上の衝撃荷重が加わって乗物後方側に膨出するときに、連結部材が同時に後方に回動するため、受圧部材が後方に回動しやすくなり、後面衝突時の受圧部材の動きがスムーズになる。
請求項7の乗物用シートによれば、ストッパが溝の端部に当接して回動が阻止され、乗物前方側への膨脹時と乗物後方側への膨脹時のそれぞれでばねのテンションがかかり、受圧部材の凸形状が維持される。
According to the vehicle seat of claim 1, by using the spring force of the leaf spring, when the load exceeds a certain load, the pressure receiving member protrudes from the shape projecting toward the vehicle front side to the vehicle rear side. The occupant is deformed into a convex shape, and its support surface moves quickly rearward, so that the amount of sinking of the upper body of the occupant into the seat back can be secured larger than the conventional one. The head of the vehicle can be quickly brought close to the headrest to support the occupant's head with the headrest, and the neck injury value can be effectively reduced. Further, the mechanism is simple, and the mechanism for reducing the neck injury value and the entire seat can be reduced in size and weight.
According to the vehicle seat of claim 2, the same mechanism as that of the vehicle seat of claim 1 for reducing the neck injury value is provided, and is the same as the pressure receiving member used in the mechanism for reducing the neck injury value. The lumbar support function can be provided by using these members. Therefore, it is possible to provide a vehicle seat having both a mechanism for reducing a neck injury value and a movable lumbar support function using a simple mechanism and a small number of parts.
According to the vehicle seat of claim 3, the cushion pad of the seat back can be supported more stably by the connecting member, and the upper body of the occupant is supported during normal seating, and the upper body of the occupant is surely secured during a rear collision. Can be submerged.
According to the vehicle seat of the fourth aspect, a configuration in which the holding portion of the connecting member does not cross the inside of the seat back frame is possible, and the sinking of the occupant can be increased.
According to the vehicle seat of claim 5 and claim 6, when the impact load of a certain level or more is applied to the pressure receiving member and the vehicle is swelled to the rear side of the vehicle, the connecting member simultaneously rotates rearward. It becomes easy to rotate backward, and the movement of the pressure receiving member at the time of rear collision becomes smooth.
According to the vehicle seat of the seventh aspect, the stopper is brought into contact with the end of the groove to prevent the rotation, and the spring tension is applied at the time of expansion toward the front side of the vehicle and at the time of expansion toward the rear side of the vehicle. The convex shape of the pressure receiving member is maintained.

乗物用シートの概略斜視図である。It is a schematic perspective view of a vehicle seat. 一定以上の衝撃荷重が加わる前のシートバックフレームの概略斜視図である。It is a schematic perspective view of a seat back frame before an impact load of a certain level or more is applied. 受圧部材を説明する平面図である。It is a top view explaining a pressure receiving member. 受圧部材の作動状態の説明図である。It is explanatory drawing of the operation state of a pressure receiving member. 連結部材の他の例を示す図3と同様な平面図である。It is a top view similar to FIG. 3 which shows the other example of a connection member. 他の実施形態を示す図2と同様な概略斜視図である。It is a schematic perspective view similar to FIG. 2 which shows other embodiment. 他の実施形態を示すランバーサポート機能の説明図である。It is explanatory drawing of the lumbar support function which shows other embodiment. 他の実施形態を示すランバーサポート機能の作動状態の説明図である。It is explanatory drawing of the operation state of the lumbar support function which shows other embodiment. 他の実施形態を示す受圧部材の作動状態の説明図である。It is explanatory drawing of the operating state of the pressure receiving member which shows other embodiment. さらに他の実施形態を示す図2と同様な概略斜視図である。It is a schematic perspective view similar to FIG. 2 which shows other embodiment. さらに他の実施形態を示す受圧部材の作動状態の説明図である。It is explanatory drawing of the operation state of the pressure receiving member which shows other embodiment.

以下、本発明の一実施形態について、図を参照して説明する。なお、以下に説明する部材、配置等は、本発明を限定するものではなく、本発明の趣旨に沿って各種改変することができることは勿論である。また、本明細書において、乗物とは、自動車・鉄道など車輪を有する地上走行用乗物、地上以外を移動する航空機や船舶など、シートを装着できる移動用のものをいうものとする。また通常の着座荷重とは、着座するときに生じる着座衝撃、乗物の急発進によって生じる加速時の荷重などを含むものである。また一定以上の衝撃荷重とは、後面衝突によって生じる大きな荷重であり、後方側からの乗物による大きな追突、後退走行時における大きな衝突などを指し、通常の着座荷重と同様な荷重領域のものは含まない。   Hereinafter, an embodiment of the present invention will be described with reference to the drawings. It should be noted that members, arrangements, and the like described below do not limit the present invention, and it goes without saying that various modifications can be made in accordance with the spirit of the present invention. In this specification, a vehicle means a vehicle for traveling on which a seat can be mounted, such as a vehicle for traveling on the ground having wheels such as an automobile or a railroad, an aircraft or a ship moving on the ground, and the like. Further, the normal seating load includes a seating impact that occurs when sitting, a load during acceleration caused by sudden start of the vehicle, and the like. Also, the impact load above a certain level is a large load caused by a rear collision, and refers to a large rear-end collision by a vehicle from the rear side, a large collision during reverse running, etc., including those in the load range similar to a normal seating load Absent.

図1乃至図5は本発明に係る一実施形態を示し、図1は乗物用シートの概略斜視図、図2は一定以上の衝撃荷重が加わる前のシートバックフレームの概略斜視図、図3は受圧部材を説明する平面図、図4は受圧部材の作動状態の説明図、図5は連結部材の他の例を示す図3と同様な平面図である。   1 to 5 show an embodiment according to the present invention, FIG. 1 is a schematic perspective view of a vehicle seat, FIG. 2 is a schematic perspective view of a seat back frame before an impact load of a certain level or more is applied, and FIG. FIG. 4 is an explanatory view of an operating state of the pressure receiving member, and FIG. 5 is a plan view similar to FIG. 3 showing another example of the connecting member.

本実施の形態に係る乗物用シートSは、図1で示すように、シートバックS1、着座部S2、ヘッドレストS3より構成されており、シートバックS1は、図2で示すようなシートバックフレームFに、クッションパッド1aを載置して、表皮材1bで被覆されており、乗員の背中を後方から支持するものである。   As shown in FIG. 1, the vehicle seat S according to the present embodiment includes a seat back S1, a seat S2, and a headrest S3. The seat back S1 is a seat back frame F as shown in FIG. Further, the cushion pad 1a is placed and covered with the skin material 1b, and the back of the occupant is supported from behind.

本実施形態の着座部S2は不図示の着座フレームの上に、クッションパッド2aを載置し、さらに表皮材2bで覆って形成されている。着座フレームは脚部で支持され、この脚部には、図示しないインナレールが取り付けられ、車体フロアに設置されるアウタレールとの間で、前後に位置調整可能なスライド式に組み立てられている。また着座フレームの後端部は、リクライニング機構を介してシートバックフレームFと連結されている。   The seating portion S2 of the present embodiment is formed by placing a cushion pad 2a on a seating frame (not shown) and further covering with a skin material 2b. The seating frame is supported by a leg portion, and an inner rail (not shown) is attached to the leg portion, and is assembled in a slide type that can be adjusted in the front-rear position with an outer rail installed on the vehicle body floor. The rear end portion of the seating frame is connected to the seat back frame F via a reclining mechanism.

本実施形態において、シートバックフレームFは、図2で示すように略矩形状の枠体となっており、サイド部10と、アッパー部20と、ロアー部30とを備えている。サイド部10は、シートバック幅を構成するため、左右方向に離間して配設され、上下方向に延在する2本のサイドフレーム15を有している。アッパー部20はアッパーフレーム21を有しており、このアッパーフレーム21がサイドフレーム15の上端部側から上方にコ字状に延出して左右のサイドフレーム15を連結している。   In the present embodiment, the seat back frame F is a substantially rectangular frame as shown in FIG. 2, and includes a side portion 10, an upper portion 20, and a lower portion 30. The side portion 10 includes two side frames 15 that are spaced apart in the left-right direction and extend in the up-down direction in order to form a seat back width. The upper portion 20 has an upper frame 21, and the upper frame 21 extends upward in a U shape from the upper end side of the side frame 15 to connect the left and right side frames 15.

シートバックフレームFのアッパー部20には、ヘッドレストピラー支持部22が配設されている。このヘッドレストピラー支持部22には、ヘッドレストS3を支持するヘッドレストピラー23(図1参照)がガイドロック(不図示)を介して取り付けられて、ヘッドレストS3が取り付けられるようになっている。ヘッドレストS3は、芯材(不図示)にパッド材3aを配して、表皮材3bで被覆して形成され、ヘッドレストピラー23によって支持されている。   A headrest pillar support portion 22 is disposed on the upper portion 20 of the seat back frame F. A headrest pillar 23 (see FIG. 1) that supports the headrest S3 is attached to the headrest pillar support portion 22 via a guide lock (not shown), and the headrest S3 is attached. The headrest S3 is formed by covering a core material (not shown) with a pad material 3a and covering with a skin material 3b, and is supported by a headrest pillar 23.

また、シートバックフレームFのロアー部30は、左右に配設されたサイドフレーム15の下端部側で、左右のサイドフレーム15を連結するロアーフレーム31を有している。なお、本実施形態のシートバックフレームFは、サイド部10を構成するサイドフレーム15とアッパー部20を構成するアッパーフレーム21とロアー部30を構成するロアーフレーム31とがそれぞれ別部材で形成されているが、一体のパイプフレームや一体の板状フレーム等で形成することもできる。   The lower portion 30 of the seat back frame F includes a lower frame 31 that connects the left and right side frames 15 on the lower end side of the side frames 15 disposed on the left and right sides. In the seat back frame F of the present embodiment, the side frame 15 that constitutes the side portion 10, the upper frame 21 that constitutes the upper portion 20, and the lower frame 31 that constitutes the lower portion 30 are formed as separate members. However, it can be formed of an integral pipe frame, an integral plate frame, or the like.

本実施形態のサイドフレーム15は、シートバックフレームFの側面を構成する延伸部材であり、左右方向に所定間隔を有して対向して配設されている。そして、図2及び図4で示すように、平板状の側板15aと、この側板15aの乗物前方側に位置する前端部からL字型に内側へ屈曲した前縁部15bと、後端部からL字型に内側へ屈曲した後縁部15cとを有している。   The side frame 15 of the present embodiment is an extending member that constitutes a side surface of the seat back frame F, and is disposed to face each other with a predetermined interval in the left-right direction. 2 and 4, a flat side plate 15a, a front edge portion 15b bent inward in an L shape from a front end portion located on the vehicle front side of the side plate 15a, and a rear end portion It has an L-shaped rear edge 15c bent inward.

シートバックフレームFの略中央部には、受圧部材40が配設されている。この受圧部材40は、乗員の背部を支持するための板状の部材であり、通常の着座時には乗員の背部を面で支持して着座姿勢を安定させるとともに、後述するように、車両が後方から衝突(後面衝突)を受けたときには乗員の後方移動により押圧されて後方へ移動し、乗員の上体をシートバックS1に沈み込ませる機能を備えるものである。受圧部材40はヘッドレストS3とは連動せずに独立して可動する。   A pressure receiving member 40 is disposed substantially at the center of the seat back frame F. The pressure receiving member 40 is a plate-like member for supporting the occupant's back, and during normal seating, the occupant's back is supported by the surface to stabilize the seating posture. When a collision (rear surface collision) is received, it is pressed by the occupant's rearward movement and moved rearward, and has a function of sinking the occupant's upper body into the seat back S1. The pressure receiving member 40 is independently movable without interlocking with the headrest S3.

本実施形態の受圧部材40は、鋼材からなる板ばねを略矩形状に形成した部材であり、図2で示すように、シートバックフレームF内の両側のサイドフレーム15の間のサイドフレーム15に干渉しない内側領域に配設されている。
そして、上部側と下部側がそれぞれ、受圧部材40の上下方向に離間して設けられた第1連結部材50と第2連結部材60とにより保持されて、左右のサイドフレーム15間に上部側と下部側で架設されて、サイド部10のサイドフレーム15に連結されている。
The pressure receiving member 40 of this embodiment is a member in which a leaf spring made of steel is formed in a substantially rectangular shape, and as shown in FIG. 2, the pressure receiving member 40 is formed on the side frame 15 between the side frames 15 on both sides in the seat back frame F. It is arranged in the inner area where it does not interfere.
The upper side and the lower side are respectively held by the first connecting member 50 and the second connecting member 60 that are spaced apart in the vertical direction of the pressure receiving member 40, and the upper side and the lower side are interposed between the left and right side frames 15. It is constructed on the side and connected to the side frame 15 of the side part 10.

図2及び図3に示すように、本実施形態の第1連結部材50、及び第2連結部材60は、それぞれ、鋼材からなる筒状のメインパイプ51,61(内筒)と、メインパイプ51,61の外径よりやや内径が大きくメインパイプ51,61の外周に回動可能に設けられた鋼材からなる筒状のブラケット53,63(外筒)を有している。メインパイプ51,61は、左右のサイドフレーム15の側板15aに、連結部51a,61aで連結されている。本実施形態の連結部51a,61aでは、押えボルトをサイドフレーム15の外側からねじ込んでメインパイプ51,61の両端部をそれぞれ左右のサイドフレーム15に固着している。ブラケット53,63は、内筒としてのメインパイプ51,61の外周に沿ってメインパイプ51,61の中心線を軸として回動可能であり、すなわちブラケット53とブラケット63とを結ぶ仮想線Xに対して略垂直方向(本実施形態ではシートバックフレームFの左右方向)を軸として回動可能である。   As shown in FIG.2 and FIG.3, the 1st connection member 50 of this embodiment and the 2nd connection member 60 are respectively the cylindrical main pipes 51 and 61 (inner cylinder) which consist of steel materials, and the main pipe 51. , 61 have cylindrical brackets 53, 63 (outer cylinders) made of steel and having a slightly larger inner diameter than the outer diameters of the main pipes 51, 61. The main pipes 51 and 61 are connected to the side plates 15a of the left and right side frames 15 by connecting portions 51a and 61a. In the connecting portions 51a and 61a of the present embodiment, the presser bolts are screwed from the outside of the side frames 15 to fix the both ends of the main pipes 51 and 61 to the left and right side frames 15, respectively. The brackets 53 and 63 are rotatable about the center line of the main pipes 51 and 61 along the outer periphery of the main pipes 51 and 61 as inner cylinders, that is, along a virtual line X connecting the bracket 53 and the bracket 63. On the other hand, it is rotatable about a substantially vertical direction (in this embodiment, the left-right direction of the seat back frame F) as an axis.

ブラケット53は受圧部材40の幅よりやや長尺で、外周の長手方向に受圧部材40の上部側が溶着されて、受圧部材40を保持している。同様にブラケット63は受圧部材40の下部側と溶着されて、受圧部材40の下部側を保持している。本実施形態では、このブラケット53,63が上下方向に離間して設けられた受圧部材40を保持する保持部である。
また、ブラケット53,63と受圧部材40との固定を補強するために、補強部材57,67が、それぞれブラケット53,63の外周を覆うと共にブラケット53,63と受圧部材40との接合部分を受圧部材40の板体の表面側と裏面側から挟持して設けられ、受圧部材40との重畳部分をビス等の固着具58,68で固定している。
The bracket 53 is slightly longer than the width of the pressure receiving member 40, and the upper side of the pressure receiving member 40 is welded in the longitudinal direction of the outer periphery to hold the pressure receiving member 40. Similarly, the bracket 63 is welded to the lower side of the pressure receiving member 40 and holds the lower side of the pressure receiving member 40. In the present embodiment, the brackets 53 and 63 are holding portions that hold the pressure receiving member 40 that is provided apart in the vertical direction.
In addition, in order to reinforce the fixation between the brackets 53 and 63 and the pressure receiving member 40, the reinforcing members 57 and 67 cover the outer periphery of the brackets 53 and 63, respectively, and receive the pressure at the joint portion between the brackets 53 and 63 and the pressure receiving member 40. The member 40 is provided so as to be sandwiched from the front surface side and the back surface side of the plate body, and the overlapping portion with the pressure receiving member 40 is fixed by fixing tools 58 and 68 such as screws.

本実施形態では、内側の筒のメインパイプ51,61には、外周の外側に向けて突起したピン52,62が受圧部材40の幅より内側にそれぞれ2箇所設けられており、外側の筒のブラケット53,63には、ピン52,62と対応する位置に所定の長さを有する溝54,64がそれぞれ2箇所設けられている。溝54,64は、離間して設けられた保持部であるブラケット53とブラケット63とを結ぶ仮想線Xと略平行方向、すなわち本実施形態ではシートバックフレームFの上下方向に所定の長さを有して形成されている。ピン52,62をこの溝54,64に挿通してメインパイプ51,61にブラケット53,63を組付ける。ピン52,62は、ブラケット53,63が回動すると、溝54,64に案内されて溝54,64の長さの範囲内でブラケット53,63の回動方向に移動し、溝54,64の上端部又は下端部と当接してブラケット53,63の回動を阻止するストッパとして機能する。   In the present embodiment, the main pipes 51 and 61 of the inner cylinder are provided with two pins 52 and 62 protruding toward the outside of the outer periphery, respectively, on the inner side of the width of the pressure receiving member 40. The brackets 53 and 63 are provided with two grooves 54 and 64 having predetermined lengths at positions corresponding to the pins 52 and 62, respectively. The grooves 54 and 64 have a predetermined length in a direction substantially parallel to an imaginary line X connecting the bracket 53 and the bracket 63, which are holding portions provided apart from each other, that is, in the vertical direction of the seat back frame F in the present embodiment. It is formed. The pins 52 and 62 are inserted into the grooves 54 and 64, and the brackets 53 and 63 are assembled to the main pipes 51 and 61. When the brackets 53 and 63 rotate, the pins 52 and 62 are guided by the grooves 54 and 64 and move in the rotation direction of the brackets 53 and 63 within the range of the length of the grooves 54 and 64. It functions as a stopper that prevents the brackets 53 and 63 from rotating by contacting the upper end or the lower end of the bracket.

図4に示すように、受圧部材40は、上下方向に離間して設けられた保持部53と保持部63の距離Yよりも長く形成され、上端部と下端部がそれぞれ保持部53,63に保持されており、通常は乗物前方側へ凸状に膨出し(図4の実線で示す受圧部材40)、クッションパッド1aの背面を後方から支持している。
また、乗員が乗物用シートSに着座した場合、通常の着座荷重(100N程度)では、受圧部材40はこの前方側へ膨出した形状を維持し、乗員の背部を支持して着座姿勢を安定させるように構成されている。
As shown in FIG. 4, the pressure receiving member 40 is formed longer than the distance Y between the holding portion 53 and the holding portion 63 that are spaced apart in the vertical direction, and the upper end portion and the lower end portion thereof are formed on the holding portions 53 and 63, respectively. Usually, it bulges convexly toward the front side of the vehicle (the pressure receiving member 40 shown by the solid line in FIG. 4), and supports the back surface of the cushion pad 1a from the rear.
Further, when the occupant is seated on the vehicle seat S, the pressure receiving member 40 maintains the shape bulging forward and stabilizes the sitting posture by supporting the back of the occupant with a normal seating load (about 100 N). It is configured to let you.

このように、受圧部材40を保持する外筒である上下のブラケット53,63を、内筒であるメインパイプ51,61の外周に沿って回動可能に設けることで、受圧部材40の板ばねの後述する後方移動がスムーズに行える。また、メインパイプ51,61のピン52,62がブラケット53,63の溝54,64に沿って案内され、ストッパとして溝54,64の端部で内筒のメインパイプ51,61の回動を所定位置で阻止するため、受圧部材40の板ばねの回動を所定の範囲に規制でき、板ばねのテンションがかかり、凸形状が維持される。   As described above, the upper and lower brackets 53 and 63 that are outer cylinders that hold the pressure receiving member 40 are provided so as to be rotatable along the outer circumferences of the main pipes 51 and 61 that are inner cylinders. The rearward movement described later can be performed smoothly. Further, the pins 52 and 62 of the main pipes 51 and 61 are guided along the grooves 54 and 64 of the brackets 53 and 63, and the main pipes 51 and 61 of the inner cylinder are rotated at the ends of the grooves 54 and 64 as stoppers. Since blocking is performed at a predetermined position, the rotation of the leaf spring of the pressure receiving member 40 can be restricted within a predetermined range, the tension of the leaf spring is applied, and the convex shape is maintained.

後面衝突が発生し、慣性により乗員が後方へ移動して一定以上の衝撃荷重がシートバックS1に加わると、受圧部材40が後方へ押圧されて移動するとともに、連結部材50,60のブラケット53,63がメインパイプ51,61の外周に沿って図4の矢印P1,P2方向に回動し、受圧部材40が仮想線で示す後方位置に移動する。受圧部材40が後方移動を開始する荷重の大きさは、1500N程度に設定しておくと好ましい。   When a rear collision occurs and the occupant moves rearward due to inertia and an impact load of a certain level or more is applied to the seat back S1, the pressure receiving member 40 is pushed rearward and moved, and the brackets 53 of the connecting members 50 and 60, 63 rotates in the directions of arrows P1 and P2 in FIG. 4 along the outer periphery of the main pipes 51 and 61, and the pressure receiving member 40 moves to the rear position indicated by the phantom line. The magnitude of the load at which the pressure receiving member 40 starts to move backward is preferably set to about 1500N.

受圧部材40は板ばねで形成されているので、一定以上の衝撃荷重で後方へ押圧されて変形し、連結部材50,60を結ぶ直線を越える位置まで移動すると、その特性により後方への移動が非常に迅速に行なわれる。さらに、受圧部材40を保持するブラケット53,63が回動可能に設けられているので、受圧部材40が後方へ移動しやすく、後方移動がスムーズに行われる。   Since the pressure receiving member 40 is formed of a leaf spring, it is deformed by being pushed rearward with an impact load of a certain level or more, and when moving to a position exceeding the straight line connecting the connecting members 50 and 60, the backward movement is caused by its characteristics. It is done very quickly. Furthermore, since the brackets 53 and 63 for holding the pressure receiving member 40 are rotatably provided, the pressure receiving member 40 can easily move backward, and the rearward movement can be performed smoothly.

このように、一定以上の衝撃荷重を受けて受圧部材40が迅速に後方移動することにより、乗員の上体がシートバックS1に大きく沈み込み、頭部の移動量に対して上体の移動量が追従できる。すなわち、乗員の頭部が速やかにヘッドレストS3に近づいてヘッドレストS3により乗員の頭部を支持できるので、頸部傷害値を効果的に低減することが可能となる。   In this way, when the pressure receiving member 40 rapidly moves backward under an impact load of a certain level or more, the upper body of the occupant sinks greatly into the seat back S1, and the amount of movement of the upper body relative to the amount of movement of the head Can follow. That is, since the head of the occupant quickly approaches the headrest S3 and can be supported by the headrest S3, the neck injury value can be effectively reduced.

図5は連結部材の他の例を示す。図3で示した連結部材の例では、連結部材50,60のメインパイプ51,61を内筒とし、ブラケット53,63を外筒としてメインパイプ51,61の外側に回動可能に取付けて、ストッパとしてピン54,64を設けたが、図5の例では、第1連結部材150,第2連結部材160のそれぞれのメインパイプ151,161の内径をブラケット153,163の外径より大きく形成し、ブラケット153,163を内筒、メインパイプ151,161を外筒として構成している。   FIG. 5 shows another example of the connecting member. In the example of the connecting member shown in FIG. 3, the main pipes 51 and 61 of the connecting members 50 and 60 are used as inner cylinders, and the brackets 53 and 63 are used as outer cylinders so as to be rotatable outside the main pipes 51 and 61. Although pins 54 and 64 are provided as stoppers, in the example of FIG. 5, the inner diameters of the main pipes 151 and 161 of the first connecting member 150 and the second connecting member 160 are made larger than the outer diameters of the brackets 153 and 163, respectively. The brackets 153 and 163 are configured as inner cylinders, and the main pipes 151 and 161 are configured as outer cylinders.

ブラケット153,163と、受圧部材40とを接合する接合部154,164が、それぞれ左右2箇所でブラケット153,163と受圧部材40とに溶着され、ブラケット153,163と受圧部材40とを連結している。接合部154,164は厚みを有する平板状の部材であり、ブラケット153,163に形成された溝152,162に挿入されている。また、接合部154,164と受圧部材40との接合部分は、受圧部材40の表面側と裏面側の両側から補強部材157,167で挟持され、ビス等の固着具158,168で固定されている。外筒であるメインパイプ151,161の両端はそれぞれ、図3の例と同様にサイドフレーム15と連結されている。   Joining portions 154 and 164 joining the brackets 153 and 163 and the pressure receiving member 40 are welded to the brackets 153 and 163 and the pressure receiving member 40 at two places on the left and right sides, respectively, and the brackets 153 and 163 and the pressure receiving member 40 are connected. ing. The joint portions 154 and 164 are flat plate-like members having a thickness, and are inserted into the grooves 152 and 162 formed in the brackets 153 and 163. In addition, the joint portions between the joint portions 154 and 164 and the pressure receiving member 40 are sandwiched by the reinforcing members 157 and 167 from both the front surface side and the back surface side of the pressure receiving member 40, and are fixed by fixing tools 158 and 168 such as screws. Yes. Both ends of the main pipes 151 and 161 which are outer cylinders are connected to the side frame 15 as in the example of FIG.

そして、受圧部材40が一定以上の衝撃を受けて乗物後方側へ膨出するように移動すると、接合部154,164がこの溝152,162に案内されて溝の長さの範囲内で移動し、溝の端部に当接してブラケット153,163の回動を阻止するストッパとして機能する。このように連結部材150,160を構成しても、受圧部材40の後方移動が可能となる。   When the pressure receiving member 40 receives an impact of a certain level or more and moves so as to bulge toward the vehicle rear side, the joint portions 154 and 164 are guided by the grooves 152 and 162 and moved within the length of the groove. , It functions as a stopper that abuts against the end of the groove and prevents the brackets 153 and 163 from rotating. Even if the connecting members 150 and 160 are configured in this manner, the pressure receiving member 40 can be moved backward.

なお、本実施形態では、連結部材50,60(150,160)をメインパイプ51,61(151,161)とブラケット53,63(153,163)の2つの筒状部材を重ねあわせて回動可能に構成しているが、連結部材50,60をメインパイプ51,61のみで構成し、メインパイプ51,61に受圧部材40を固着して保持させ、メインパイプ51,61の端部をサードフレーム15の連結部51a,61aで回動可能に軸支して取付けてもよい。このように構成しても、受圧部材40が一定以上の衝撃荷重を受けたときに後方に回動し、乗員の上体を沈み込ませることができる。   In this embodiment, the connecting members 50 and 60 (150 and 160) are rotated by overlapping the two tubular members of the main pipes 51 and 61 (151 and 161) and the brackets 53 and 63 (153 and 163). Although the connecting members 50 and 60 are composed only of the main pipes 51 and 61, the pressure receiving member 40 is fixedly held on the main pipes 51 and 61, and the ends of the main pipes 51 and 61 are connected to the third. The connecting portions 51a and 61a of the frame 15 may be pivotally supported and attached. Even if comprised in this way, when the pressure receiving member 40 receives the impact load more than fixed, it rotates back, and a passenger | crew's upper body can be sunk.

図6乃至図9は、他の実施形態を示すものであり、図6は図2と同様な概略斜視図、図7はランバーサポート機能の説明図、図8はランバーサポート機能の作動状態の説明図、図9は受圧部材の作動状態の説明図である。なお、本実施形態において、前記実施形態と同一部材、同様配置等には、同一符号を付してその説明を省略する。   6 to 9 show another embodiment, FIG. 6 is a schematic perspective view similar to FIG. 2, FIG. 7 is an explanatory diagram of the lumbar support function, and FIG. 8 is an explanation of the operating state of the lumbar support function. 9 and 9 are explanatory views of the operating state of the pressure receiving member. In the present embodiment, the same members and the same arrangements as those of the previous embodiment are denoted by the same reference numerals, and the description thereof is omitted.

本実施形態の乗物用シートSは、図6及び図7に示すように、一方(本実施形態においては図6の右側)のサイドフレーム15にはランバーサポート機構70が設けられている。ランバーサポート機構70は、ワイヤ巻取り部71、ワイヤ巻取り部71と第1連結部材50のメインパイプ51とを連結するワイヤ73、第1ワイヤ係止部75、第2ワイヤ係止部76、案内溝77を有している。   As shown in FIGS. 6 and 7, the vehicle seat S of the present embodiment is provided with a lumbar support mechanism 70 on one side frame 15 (the right side of FIG. 6 in the present embodiment). The lumbar support mechanism 70 includes a wire winding portion 71, a wire 73 that connects the wire winding portion 71 and the main pipe 51 of the first connecting member 50, a first wire locking portion 75, a second wire locking portion 76, A guide groove 77 is provided.

一方のサイドフレーム15の下方には、ワイヤ巻取り部71が設けられ、ワイヤ73の一端が、ワイヤ巻取り部71のケーシング71a内に収容されているドラム(不図示)に係止されており、ワイヤ巻取り部71の操作レバー71bを操作することにより、ワイヤ73をドラムに巻き付き、巻き戻しさせるように構成されている。なお、ワイヤ巻取り部71の構成は公知のものを用いることができる。また、操作レバー71bの操作は、手動によるもの、電動によるものの何れを用いてもよい。   A wire winding portion 71 is provided below one side frame 15, and one end of the wire 73 is locked to a drum (not shown) accommodated in the casing 71 a of the wire winding portion 71. By operating the operation lever 71b of the wire winding unit 71, the wire 73 is wound around the drum and is rewound. In addition, a well-known thing can be used for the structure of the wire winding part 71. FIG. The operation lever 71b may be operated manually or electrically.

第1ワイヤ係止部75は、連結部材50とサイドフレーム15との連結部51aよりも上方に、サイドフレーム15の外側へ突起して設けられており、ワイヤ巻取り部71のケーシング71aの上部側から上方へ延出しているワイヤ73を下方へ折り返して滑動可能に掛止している。第2ワイヤ係止部76は、サイドフレーム15に設けられた案内溝77よりも下方に、サイドフレーム15の外側へ突起して設けられており、第1ワイヤ係止部75から折り返してきたワイヤ73をさらに上方に折り返して滑動可能に掛止している。第1ワイヤ係止部75及び第2ワイヤ係止部76の外周は、掛止されたワイヤ73が滑動可能なように滑車部材が設けられている。
ワイヤ73の他端部は、ワイヤ巻取り部71から第1ワイヤ係止部75及び第2ワイヤ係止部76を経由して、メインパイプ51の連結部51a近傍に係止されている。
The first wire locking portion 75 is provided above the connecting portion 51 a between the connecting member 50 and the side frame 15 so as to protrude to the outside of the side frame 15, and is located above the casing 71 a of the wire winding portion 71. A wire 73 extending upward from the side is folded downward and hooked so as to be slidable. The second wire locking portion 76 is provided below the guide groove 77 provided in the side frame 15 so as to protrude to the outside of the side frame 15, and the wire returned from the first wire locking portion 75. 73 is further folded upward and is slidably hooked. A pulley member is provided on the outer periphery of the first wire locking portion 75 and the second wire locking portion 76 so that the hooked wire 73 can slide.
The other end of the wire 73 is locked in the vicinity of the connecting portion 51 a of the main pipe 51 from the wire winding portion 71 via the first wire locking portion 75 and the second wire locking portion 76.

図6及び図8に示すように、両側のサイドフレーム15には、第1連結部材50のメインパイプ51の両端部がそれぞれ両側のサイドフレーム15に沿って上下方向に移動できるように、メインパイプ51の端部を案内する案内溝77がサイドフレーム15の上下方向に所定の長さを有して形成されている。メインパイプ51の両端部はシートバックフレームFの内側から外側に向けてこの案内溝77に挿通され、連結部51aでサイドフレーム15に連結されている。なお、図8では、受圧部材40の作動状態を説明するために、ランバーサポート機構70の各構成要素の図示を省略しており、また受圧部材40の作動前の状態を実線で示している。   As shown in FIGS. 6 and 8, the side pipes 15 on both sides have main pipes so that both ends of the main pipe 51 of the first connecting member 50 can move vertically along the side frames 15 on both sides. A guide groove 77 for guiding the end of 51 is formed with a predetermined length in the vertical direction of the side frame 15. Both ends of the main pipe 51 are inserted into the guide groove 77 from the inner side to the outer side of the seat back frame F, and are connected to the side frame 15 by a connecting part 51a. In FIG. 8, in order to describe the operating state of the pressure receiving member 40, illustration of each component of the lumbar support mechanism 70 is omitted, and the state before the pressure receiving member 40 is operated is indicated by a solid line.

ランバーサポート機構70を作動させない初期状態では、受圧部材40は板ばねのばね力が板ばねが平坦に戻ろうとする方向に加わり、下方に設けられた第2連結部材60のメインパイプ61の両端はサイドフレーム15に固定されているため、連結部51は案内溝77の上端部に位置し、図8の実線で示す状態を保っている。   In the initial state in which the lumbar support mechanism 70 is not operated, the pressure force of the pressure receiving member 40 is applied in the direction in which the leaf spring tries to return flat, and both ends of the main pipe 61 of the second connecting member 60 provided below are Since it is being fixed to the side frame 15, the connection part 51 is located in the upper end part of the guide groove 77, and has maintained the state shown as the continuous line of FIG.

ワイヤ巻取り部71の操作レバー71bをワイヤ73を巻き付ける方向に操作すると、ワイヤ73が引っ張られ、ワイヤ73の他端部が係止されている第1連結部材50のメインパイプ51が案内溝77を案内されて下方へ移動する。下方の第2連結部材60のメインパイプ61の両端はサイドフレーム15に固定されているため、第1連結部材50を下方へ移動させることにより、前方側へ膨出している受圧部材40が図8の仮想線で示すようにさらに前方側へ膨脹して、クッションパッド1aを前方へ押圧し、乗員の背部を支持するランバーサポートとしての機能を果たす。   When the operation lever 71 b of the wire winding portion 71 is operated in the direction in which the wire 73 is wound, the wire 73 is pulled and the main pipe 51 of the first connecting member 50 in which the other end portion of the wire 73 is locked is guided into the guide groove 77. Is guided and moves downward. Since both ends of the main pipe 61 of the lower second connecting member 60 are fixed to the side frame 15, the pressure receiving member 40 bulging forward by moving the first connecting member 50 downward is shown in FIG. As shown by the phantom line, the bag further expands forward, presses the cushion pad 1a forward, and functions as a lumbar support that supports the back of the occupant.

なお、図8の仮想線で示す受圧部材40は、メインパイプ51を案内溝77の最下端まで移動したときの状態を示しているが、操作レバー71bを操作してワイヤ73の巻き付け程度を調整することで、メインパイプ51を案内溝77の途中まで移動させることもでき、このようにして乗員の所望の程度まで受圧部材40を膨出させることができる。さらに、操作レバー71bを操作してワイヤ73を巻き戻すことで、図8の実線で示す状態に受圧部材40を戻すことができる。   8 shows a state when the main pipe 51 is moved to the lowermost end of the guide groove 77, the operating lever 71b is operated to adjust the winding degree of the wire 73. By doing so, the main pipe 51 can also be moved to the middle of the guide groove 77, and the pressure receiving member 40 can be bulged to a desired level of the occupant in this way. Furthermore, the pressure receiving member 40 can be returned to the state shown by the solid line in FIG. 8 by operating the operation lever 71b to rewind the wire 73.

図9は、ランバーサポート機構70を作動させて受圧部材40を前方側にさらに膨出させた状態で、一定以上の衝撃荷重を受けた場合に、受圧部材40が変形して後方側に膨出するよう移動したときの状態を示している。このように、ランバーサポート機構70を作動させた状態においても、板ばねの受圧部材40が後方へ移動して、乗員の上体を沈み込ませることができるため、乗員の頸部傷害値の低減を図ることができる。   FIG. 9 shows that when the lumbar support mechanism 70 is operated and the pressure receiving member 40 is further bulged forward, the pressure receiving member 40 is deformed and bulges backward when an impact load of a certain level or more is applied. It shows the state when moving to do. In this way, even when the lumbar support mechanism 70 is operated, the pressure receiving member 40 of the leaf spring moves rearward and the upper body of the occupant can be depressed, so that the cervical injury value of the occupant is reduced. Can be achieved.

以上のように、本実施形態ではランバーサポート機構70を設け、受圧部材40をラバーサポートとして機能させることができる。したがって、受圧部材40と別の部材を設けることなくランバーサポート機能を提供でき、簡単な機構で、また少ない部品点数で、後面衝突時の頸部傷害値低減の機能と、ランバーサポート機能とをあわせて備えた乗物用シートを提供することが可能となる。   As described above, in this embodiment, the lumbar support mechanism 70 is provided, and the pressure receiving member 40 can function as a rubber support. Therefore, the lumbar support function can be provided without providing a separate member from the pressure receiving member 40, and the lumbar support function and the function for reducing the neck injury value at the time of a rear collision are combined with a simple mechanism and a small number of parts. It is possible to provide a vehicle seat provided.

図10及び図11は、さらに他の実施形態を示すものであり、図10は図2と同様な概略斜視図、図11は受圧部材の作動状態の説明図である。本実施形態においても、前記実施形態と同一部材、同様配置等には、同一符号を付してその説明を省略する。
本実施形態では、第1連結部材50、第2連結部材60は、左右両側のサイド部10のサイドフレーム15のそれぞれに沿って設けられている。メインパイプ51,61は略コ字状に形成されており、コ字の両端部が上下方向に2箇所並列してサイドフレーム15の側板15aに連結部51a,51bで連結されている。連結部51a,51bは上記した実施形態と同様に押えボルトを用いてサイドフレーム15に固着されている。
10 and 11 show still another embodiment. FIG. 10 is a schematic perspective view similar to FIG. 2, and FIG. 11 is an explanatory view of the operating state of the pressure receiving member. Also in the present embodiment, the same members and the same arrangements as those of the above-described embodiment are denoted by the same reference numerals, and the description thereof is omitted.
In this embodiment, the 1st connection member 50 and the 2nd connection member 60 are provided along each of the side frames 15 of the side part 10 of right-and-left both sides. The main pipes 51 and 61 are formed in a substantially U-shape, and both ends of the U-shape are connected to the side plate 15a of the side frame 15 in parallel in the vertical direction by connecting portions 51a and 51b. The connecting portions 51a and 51b are fixed to the side frame 15 using presser bolts as in the above-described embodiment.

ブラケット53,63は、メインパイプ51,61のサイドフレーム15と略平行に設けられた部分の外周に回動可能に取付けられ、左右両側のサイドフレーム15のそれぞれに沿って離間して設けられ、受圧部材40の左右端部をそれぞれ保持している。ブラケット53,63(外筒)は、メインパイプ51,61(内筒)の外周に沿ってメインパイプ51,61のサイドフレーム15と略平行に設けられた部分の中心線を軸として回動可能であり、すなわちブラケット53とブラケット63とを結ぶ仮想線Zに対して略垂直方向(本実施形態ではシートバックフレームFの上下方向)を軸として回動可能に設けられている。   The brackets 53 and 63 are rotatably attached to the outer periphery of a portion provided substantially parallel to the side frame 15 of the main pipes 51 and 61, and are provided separately along the left and right side frames 15, The left and right ends of the pressure receiving member 40 are held. The brackets 53 and 63 (outer cylinder) can be rotated about the center line of the portion provided substantially parallel to the side frame 15 of the main pipes 51 and 61 along the outer periphery of the main pipes 51 and 61 (inner cylinder). That is, it is provided so as to be rotatable about a direction substantially perpendicular to the virtual line Z connecting the bracket 53 and the bracket 63 (in the present embodiment, the vertical direction of the seat back frame F).

受圧部材40の左右の長さは、この離間して設けられた保持部としてのブラケット53,63の距離よりも長く形成されており、通常は乗物前方側へ凸状に膨出し、クッションパッド1aの背面を後方から支持している。この受圧部材40の最も膨脹した部分が両側のサイドフレーム15の略中央に位置するように受圧部材40、第1連結部材50、及び第2連結部材60を配置すると乗員の背部を安定して支持することができる。そして、上記した実施形態と同様、乗員が乗物用シートSに着座した場合、通常の着座荷重では、受圧部材40はこの前方側へ膨出した形状を維持し、乗員の背部を支持して着座姿勢を安定させるように構成されている。   The left and right lengths of the pressure receiving member 40 are formed to be longer than the distance between the brackets 53 and 63 as the holding portions provided apart from each other. Usually, the pressure receiving member 40 bulges convexly toward the front side of the vehicle, and the cushion pad 1a. Is supported from the rear. When the pressure receiving member 40, the first connecting member 50, and the second connecting member 60 are arranged so that the most expanded portion of the pressure receiving member 40 is located at the approximate center of the side frames 15 on both sides, the back of the passenger is stably supported. can do. As in the above-described embodiment, when the occupant is seated on the vehicle seat S, the pressure receiving member 40 maintains the shape bulging forward and supports the back of the occupant under normal seating load. It is configured to stabilize the posture.

後面衝突が発生し、慣性により乗員が後方へ移動して一定以上の衝撃荷重がシートバックS1に加わると、図11に示すように、受圧部材40が後方へ押圧されて移動する。このとき、連結部材50,60のブラケット53,63がメインパイプ51,61の外周に沿って回動するので、受圧部材40の後方移動がスムーズに行える。   When a rear collision occurs and the occupant moves backward due to inertia and an impact load of a certain level or more is applied to the seat back S1, the pressure receiving member 40 is pressed backward and moved as shown in FIG. At this time, since the brackets 53 and 63 of the connecting members 50 and 60 rotate along the outer peripheries of the main pipes 51 and 61, the rearward movement of the pressure receiving member 40 can be performed smoothly.

このように、一定以上の衝撃荷重を受けて受圧部材40が迅速に後方移動することにより、乗員の上体がシートバックS1に大きく沈み込み、乗員の頭部が速やかにヘッドレストS3に近づいてヘッドレストS3により乗員の頭部を支持できるので、頸部傷害値を効果的に低減することができる。また、本実施形態では、連結部材50,60が両側のサイドフレーム15に沿って設けられており、シートバックフレームFの内側を横断していないように構成されているため、乗員の沈み込みをより大きくすることができる。   In this way, when the pressure receiving member 40 is rapidly moved rearward under an impact load of a certain level or more, the upper body of the occupant sinks greatly into the seat back S1, and the head of the occupant quickly approaches the headrest S3. Since the occupant's head can be supported by S3, the neck injury value can be effectively reduced. Further, in the present embodiment, the connecting members 50 and 60 are provided along the side frames 15 on both sides, and are configured not to cross the inside of the seat back frame F. Can be larger.

なお、上記各実施形態では、具体例として、自動車のフロントシートのシートバックについて説明したが、これに限らず、後部座席のシートバックについても、同様の構成を適用可能であることは勿論である。   In each of the above embodiments, the seat back of the front seat of the automobile has been described as a specific example. However, the present invention is not limited to this, and the same configuration can be applied to the seat back of the rear seat. .

また、上記各実施形態の受圧部材40は鋼材からなる板ばねを用いているが、樹脂素材からなる板ばねを用いてもよい。
また、上記各実施形態では、上部側の第1連結部材50と下部側の第2連結部材60の両方を回動可能に取付けたが、受圧部材40の上部側と下部側、若しくは左右の何れか一方の連結部材を回動するようにしてもよい。
さらに、上記各実施形態ではストッパは1つの連結部材において左右又は上下2箇所に設けられているが、ストッパの数はこれに限定されるものではない。
Moreover, although the pressure receiving member 40 of each said embodiment uses the leaf | plate spring which consists of steel materials, you may use the leaf | plate spring which consists of resin materials.
Further, in each of the above embodiments, both the upper side first connecting member 50 and the lower side second connecting member 60 are rotatably attached, but either the upper side and the lower side of the pressure receiving member 40, or the left and right sides. One of the connecting members may be rotated.
Furthermore, in each said embodiment, although the stopper is provided in two places on right and left or upper and lower sides in one connection member, the number of stoppers is not limited to this.

以上のように、本発明の乗物用シートによれば、ヘッドレストと独立した機構により、簡単な機構且つ少ない部品点数で、一定以上の衝撃荷重が加わったときに迅速に作動し、乗員の上体の後方への沈み込みを確保して乗員の頸部傷害値を効果的に低減できる。
さらに、本発明の乗物用シートによれば、頸部傷害値低減機構とランバーサポート機構の部品を共有化することにより、簡単な機構且つ少ない部品点数で、ランバーサポート機能を備えた頸部傷害値低減シートの提供が可能となり、シートの小型化、軽量化が可能となる。
As described above, according to the vehicle seat of the present invention, the mechanism that is independent of the headrest operates quickly when a certain level of impact load is applied with a simple mechanism and a small number of parts. It is possible to effectively reduce the cervical injury value of the occupant by ensuring the rearward sinking of the vehicle.
Furthermore, according to the vehicle seat of the present invention, by sharing the parts of the cervical injury value reduction mechanism and the lumbar support mechanism, the cervical injury value provided with a lumbar support function with a simple mechanism and a small number of parts. A reduction sheet can be provided, and the sheet can be reduced in size and weight.

1a,2a,3a クッションパッド(パッド材)
1b,2b,3b 表皮材
10 サイド部
15 サイドフレーム
15a 側板
15b 前縁部
15c 後縁部
20 アッパー部
21 アッパーフレーム
22 ヘッドレストピラー支持部
23 ヘッドレストピラー
30 ロアー部
31 ロアーフレーム
40 受圧部材
50,150 第1連結部材
51,61,151,161 メインパイプ(中筒)
51a,51b,61a,61b 連結部
52,62 ピン(ストッパ)
53,63,153,163 ブラケット(保持部)(外筒)
54,64,152,162 溝
57,67,157,167 補強部材
58,68,158,168 固着具
60,160 第2連結部材
70 ランバーサポート機構
71 ワイヤ巻取り部
71a ケーシング
71b 操作レバー
73 ワイヤ
75 第1ワイヤ係止部
76 第2ワイヤ係止部
77 案内溝
154,164 接合部(ストッパ)
S 乗物用シート
S1 シートバック
S2 着座部
S3 ヘッドレスト
F シートバックフレーム
1a, 2a, 3a Cushion pad (pad material)
1b, 2b, 3b Skin material 10 Side part 15 Side frame 15a Side plate 15b Front edge part 15c Rear edge part 20 Upper part 21 Upper frame 22 Headrest pillar support part 23 Headrest pillar 30 Lower part 31 Lower frame 40 Pressure receiving member 50, 150 First 1 connecting member 51, 61, 151, 161 main pipe (middle cylinder)
51a, 51b, 61a, 61b Connecting portion 52, 62 Pin (stopper)
53, 63, 153, 163 Bracket (holding part) (outer cylinder)
54, 64, 152, 162 Grooves 57, 67, 157, 167 Reinforcing members 58, 68, 158, 168 Fasteners 60, 160 Second connecting member
70 Lumbar support mechanism 71 Wire winding portion 71a Casing 71b Operation lever 73 Wire 75 First wire locking portion 76 Second wire locking portion 77 Guide grooves 154, 164 Joining portion (stopper)
S vehicle seat S1 seat back S2 seating part S3 headrest F seat back frame

Claims (7)

両側に位置するサイド部及び上方に配設されたアッパー部を少なくとも備えたシートバックフレームと、
該シートバックフレームの上方に配設されるヘッドレストと、
該ヘッドレストと独立して可動する板ばねからなる受圧部材と、
少なくとも2箇所に離間して設けられた保持部で前記受圧部材を保持して前記シートバックフレームのサイド部と連結する連結部材と、を備え、
前記受圧部材は、前記離間して設けられた保持部の距離より長く形成されて、乗物前方側に膨出して前記保持部に保持され、一定以上の衝撃荷重によって膨出方向が乗物後方側になることを特徴とする乗物用シート。
A seat back frame having at least side portions located on both sides and an upper portion disposed above;
A headrest disposed above the seat back frame;
A pressure receiving member made of a leaf spring that moves independently of the headrest;
A connecting member that holds the pressure-receiving member and holds the pressure-receiving member connected to the side portion of the seat back frame by holding portions provided at least at two locations;
The pressure receiving member is formed to be longer than the distance between the holding portions provided apart from each other, and bulges toward the vehicle front side and is held by the holding portion. A vehicle seat characterized by comprising:
両側に位置するサイド部及び上方に配設されたアッパー部を少なくとも備えたシートバックフレームと、
該シートバックフレームの上方に配設されるヘッドレストと、
該ヘッドレストと独立して可動する板ばねからなる受圧部材と、
少なくとも2箇所に離間して設けられた保持部で前記受圧部材を保持して前記シートバックフレームのサイド部と連結する連結部材と、を備え、
前記受圧部材は、前記離間して設けられた保持部の距離より長く形成されて、乗物前方側に膨出して前記保持部に保持され、一定以上の衝撃荷重によって膨出方向が乗物後方側になり、
前記連結部材の少なくとも一つが、前記サイド部との連結位置で移動可能に連結され、前記連結部材が移動して前記受圧部材の膨出量を調整可能としていることを特徴とする乗物用シート。
A seat back frame having at least side portions located on both sides and an upper portion disposed above;
A headrest disposed above the seat back frame;
A pressure receiving member made of a leaf spring that moves independently of the headrest;
A connecting member that holds the pressure-receiving member and holds the pressure-receiving member connected to the side portion of the seat back frame by holding portions provided at least at two locations;
The pressure receiving member is formed to be longer than the distance between the holding portions provided apart from each other, and bulges toward the vehicle front side and is held by the holding portion. Become
At least one of the connecting members is movably connected at a connecting position with the side portion, and the connecting member moves to adjust a bulging amount of the pressure receiving member.
前記連結部材の保持部は、前記シートバックフレームの上下方向に離間して設けられ前記サイド部と連結されていることを特徴とする請求項1又は2に記載の乗物用シート。   The vehicle seat according to claim 1 or 2, wherein the holding portion of the connecting member is provided so as to be spaced apart in the vertical direction of the seat back frame and connected to the side portion. 前記連結部材の保持部は、それぞれ前記シートバックフレームの両側のサイド部に沿って設けられ前記サイド部と連結されていることを特徴とする請求項1に記載の乗物用シート。   The vehicle seat according to claim 1, wherein the holding portions of the connecting members are provided along side portions on both sides of the seat back frame and are connected to the side portions. 前記連結部材は、前記離間して設けられた保持部を結ぶ仮想線に対する垂直方向を軸として、回動可能に形成されていることを特徴とする請求項1乃至4のいずれか1項に記載の乗物用シート。   5. The connection member according to claim 1, wherein the connection member is formed to be rotatable about a direction perpendicular to an imaginary line connecting the holding portions provided apart from each other. 6. Vehicle seats. 前記連結部材は、内筒と外筒とから形成され、何れか一方の筒が前記受圧部材を保持し、他方の筒が前記サイド部と連結され、前記受圧部材を保持する筒が前記サイド部と連結される筒に対して回動することで、回動可能に形成されていることを特徴とする請求項5に記載の乗物用シート。   The connecting member is formed of an inner cylinder and an outer cylinder, and one of the cylinders holds the pressure receiving member, the other cylinder is connected to the side part, and the cylinder holding the pressure receiving member is the side part. The vehicle seat according to claim 5, wherein the vehicle seat is configured to be rotatable by rotating with respect to a cylinder connected to the vehicle. 前記外筒には回動方向に所定の長さの溝が形成され、前記内筒には前記溝に案内されるストッパが形成され、前記受圧部材を保持する筒が前記溝の長さの範囲で回動可能に形成されていることを特徴とする請求項6に記載の乗物用シート。   The outer cylinder is formed with a groove having a predetermined length in the rotation direction, the inner cylinder is formed with a stopper guided by the groove, and the cylinder holding the pressure receiving member is within the range of the length of the groove. The vehicle seat according to claim 6, wherein the vehicle seat is formed to be rotatable.
JP2009169973A 2009-07-21 2009-07-21 Vehicle seat Expired - Fee Related JP5489565B2 (en)

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JP2014218185A (en) * 2013-05-09 2014-11-20 日本発條株式会社 Vehicle seat
JP2015231787A (en) * 2014-06-10 2015-12-24 トヨタ紡織株式会社 Vehicle seat
CN107532635A (en) * 2015-06-29 2018-01-02 株式会社海莱客思 Fixture construction

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JP2014218185A (en) * 2013-05-09 2014-11-20 日本発條株式会社 Vehicle seat
JP2015231787A (en) * 2014-06-10 2015-12-24 トヨタ紡織株式会社 Vehicle seat
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CN107532635A (en) * 2015-06-29 2018-01-02 株式会社海莱客思 Fixture construction

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