JP2007055495A - Seat for automobile - Google Patents

Seat for automobile Download PDF

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JP2007055495A
JP2007055495A JP2005244576A JP2005244576A JP2007055495A JP 2007055495 A JP2007055495 A JP 2007055495A JP 2005244576 A JP2005244576 A JP 2005244576A JP 2005244576 A JP2005244576 A JP 2005244576A JP 2007055495 A JP2007055495 A JP 2007055495A
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receiving member
occupant
vehicle
seat cushion
seat
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JP4744236B2 (en
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Yoshibumi Taoka
義文 田岡
Tetsuro Ushijima
哲朗 牛嶋
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Daihatsu Motor Co Ltd
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Daihatsu Motor Co Ltd
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Abstract

<P>PROBLEM TO BE SOLVED: To provide a seat for an automobile capable of reliably restricting the forward movement of an occupant when quickly decelerating the automobile without deteriorating sitting comfort of the occupant. <P>SOLUTION: A recessed part 4 is provided in a front bottom surface of a cushion pad 2 of a seat cushion 1, and a stopper member 13 extended in the cross direction of the seat cushion 1 is arranged inside the recessed part 4. The stopper member 13 is supported freely to turn around a first support shaft pin 7 positioned in front of the automobile. A surface of the recessed part 4 in rear of the automobile is structured of a nearly vertical surface 5, and vertical length of the nearly vertical surface 5 is set at the height of the stopper member 13 or more. <P>COPYRIGHT: (C)2007,JPO&INPIT

Description

本発明は自動車用シートに関し、特に自動車の急減速時に乗員の前方への移動を確実に阻止するようにした自動車用シートに関するものである。   The present invention relates to an automobile seat, and more particularly to an automobile seat that reliably prevents a passenger from moving forward when the automobile suddenly decelerates.

従来、自動車が急減速した場合に、乗員が慣性によって前方に移動するのを防止するための手段としてシートベルトが設けられている。しかし、乗員の腰部がシートクッションに沈み込みながら前方に移動するのに対して有効に作用しないことがあるという問題がある。そこで、シートクッションに正規着座状態で乗員の腰部の前部に位置するようにパイプなどのクロス部材をシートクッションの横幅方向にかけ渡して配設し、乗員の腰部をこのクロス部材で受け止めて前方移動を抑制することも提案されている。しかし、シートクッションの前部にクロス部材を配設すると、乗員の座り心地が悪くなり、ドライブの快適性を阻害するという問題があり、一方座り心地に影響しない位置までクロス部材の配置位置を下げると、乗員の前方移動防止効果が得られなくなるという問題がある。   Conventionally, when an automobile decelerates suddenly, a seat belt is provided as a means for preventing an occupant from moving forward due to inertia. However, there is a problem that the occupant's lower back portion moves forward while sinking into the seat cushion, and may not work effectively. Therefore, a cross member such as a pipe is placed across the seat cushion so that it is positioned at the front of the occupant's waist when seated normally on the seat cushion, and the occupant's waist is received by this cross member and moved forward. It has also been proposed to suppress this. However, if the cross member is disposed in the front part of the seat cushion, there is a problem in that the seating comfort of the occupant is deteriorated and the comfort of the drive is hindered. On the other hand, the position of the cross member is lowered to a position that does not affect the seating comfort. Then, there is a problem that the effect of preventing the passenger from moving forward is not obtained.

そこで、本出願人は先に、図８に示すように、シートクッション３１の内部に左右方向に延びる受止部材３２を配設し、この受止部材３２を支軸３３回りに揺動自在な揺動アーム３４の一端に固定して上下方向に移動自在に支持するとともに、受止部材３２を上方に付勢する付勢手段３５を設け、急減速時の慣性によって作動するロック部材３６を設け、急減速時にロック部材３６と揺動アーム３４の他端の係合部３７が係合して受止部材３２の下方揺動を阻止することで、受止部材３２にて乗員３８の前方移動を受け止めるようにしたものを提案している（例えば、特許文献１参照。）。
国際公開第０２／０６６２８５号パンフレット Therefore, the applicant first arranges a receiving member 32 extending in the left-right direction inside the seat cushion 31 and swings the receiving member 32 around the support shaft 33 as shown in FIG. The swing arm 34 is fixed to one end of the swing arm 34 and supported so as to be movable in the vertical direction, and a biasing means 35 for biasing the receiving member 32 upward is provided, and a lock member 36 that operates by inertia during sudden deceleration is provided. When the locking member 36 and the engaging portion 37 at the other end of the swinging arm 34 are engaged during sudden deceleration to prevent the receiving member 32 from swinging downward, the occupant 38 is moved forward by the receiving member 32. Have been proposed (see, for example, Patent Document 1).
International Publication No. 02/066285 Pamphlet

ところが、図８に示した構成では、乗員が着座したとき、その着座位置や乗員の体格によっては、クッションパッド３１を介して受止部材３２が大きく押し下げられることになり、受止部材３２の初期高さ位置が低くなってしまい、乗員の前方移動に対する十分な拘束力が得られない場合があるという問題があった。また、特に着座した状態ではクッションパッド３１の車幅方向中央がより大きく撓み、それに対応して受止部材３２がより大きく下方に押し下げられるので、さらに拘束力が低下するという問題がある。   However, in the configuration shown in FIG. 8, when the occupant is seated, depending on the seating position and the physique of the occupant, the receiving member 32 is largely pushed down via the cushion pad 31. There is a problem that the height position becomes low, and there is a case where a sufficient restraining force for the forward movement of the occupant cannot be obtained. Further, particularly in the seated state, the center of the cushion pad 31 in the vehicle width direction is more greatly bent, and the receiving member 32 is pushed downward further correspondingly, so that there is a problem that the binding force is further reduced.

また、乗員３８と受止部材３２の間に座り心地が良いように柔らかい材質にて構成されたクッションパッド３１が介在しているので、急減速時にたとえ受止部材３２が持ち上がっても、受止部材３２による拘束タイミングが遅れることになり、拘束力が十分に発揮され難いという問題もある。一方、クッションパッド３１が介在されないようにすると、当然座り心地が悪化してしまう。   In addition, since the cushion pad 31 made of a soft material is interposed between the occupant 38 and the receiving member 32 so as to be comfortable to sit, even if the receiving member 32 is lifted at the time of sudden deceleration, the receiving is possible. There is also a problem that the restraining timing by the member 32 is delayed, and the restraining force is not sufficiently exerted. On the other hand, if the cushion pad 31 is not interposed, the sitting comfort naturally becomes worse.

本発明は、上記従来の問題点に鑑み、乗員の座り心地が悪化することなく、自動車が急減速した場合に乗員が前方に移動するのを確実に抑制できる自動車用シートを提供することを目的とする。   The present invention has been made in view of the above-described conventional problems, and an object of the present invention is to provide an automobile seat that can reliably prevent the occupant from moving forward when the automobile suddenly decelerates without deteriorating the sitting comfort of the occupant. And

本発明の自動車用シートは、シートクッションの前部底面に凹部を設け、この凹部内にシートクッションの幅方向に延びる受止部材を配設するとともに、この受止部材を車両前方に位置する軸回りに回動可能に支持し、前記凹部の車両後方面を略垂直面にて構成するとともに、その略垂直面の上下方向寸法を受止部材の高さ以上としたものである。   The vehicle seat of the present invention has a recess in the bottom surface of the front portion of the seat cushion, and a receiving member extending in the width direction of the seat cushion is disposed in the recess, and the shaft that positions the receiving member in front of the vehicle. The vehicle rear surface of the recess is configured to be a substantially vertical surface, and the vertical dimension of the substantially vertical surface is greater than the height of the receiving member.

この構成によれば、急減速時に乗員が前方に移動するのに伴って、シートクッションの凹部後面の略垂直面が前方に押され、それによって略垂直面にて受止部材が前方に押されて前方上方に回動し、乗員の前方移動を受止部材にて確実に拘束することができる。また、凹部後面の略垂直面が上下に比較的長いので、乗員の着座位置や体格に左右されず、乗員の通常の着座時に受止部材が下方に下がり過ぎることがなく、乗員の前方移動を確実に拘束することができる。なお、受止部材は単純に上下回動自在であっても良いが、急減速時に慣性力で上方に回動するようにした構成と組み合わせるのが好適である。   According to this configuration, as the occupant moves forward during sudden deceleration, the substantially vertical surface of the rear surface of the recessed portion of the seat cushion is pushed forward, whereby the receiving member is pushed forward on the substantially vertical surface. Thus, the occupant can be restrained from moving forward by the receiving member. In addition, since the substantially vertical surface of the rear surface of the recess is relatively long vertically, it does not depend on the seating position or physique of the occupant, and the receiving member does not fall too much downward during normal seating of the occupant, so that the occupant can move forward. It can be restrained reliably. The receiving member may be simply rotatable up and down, but is preferably combined with a configuration in which the receiving member is rotated upward by an inertial force during sudden deceleration.

また、凹部が車両正面視において円弧形状であると、シートクッションをえぐって形成する凹部を必要最小限に形成しつつ、乗員の着座時に受止部材が大きく押し下げられることなく、凹部後面の略垂直面が受止部材の後部に対向するので、座り心地を損なうことなく、上記急減速時の乗員拘束作用を確実に奏することができて好適である。   Further, when the concave portion has an arc shape when viewed from the front of the vehicle, the concave portion formed around the seat cushion is formed to the minimum necessary, and the receiving member is not largely pushed down when the occupant is seated, and the rear surface of the concave portion is substantially vertical. Since the surface faces the rear portion of the receiving member, it is preferable that the occupant restraining action at the time of sudden deceleration can be reliably achieved without impairing the sitting comfort.

また、本発明の自動車用シートは、シートクッションの前部底面に凹部を設け、この凹部内にシートクッションの幅方向に延びる受止部材を配設するとともに、この受止部材を車両前方に位置する軸回りに回動可能に支持し、車両側面視においてシートクッションの受止部材近傍部位を、他の部位よりも減衰係数の大きい材質から成る低反発クッション材にて構成したものである。   In addition, in the automobile seat of the present invention, a recess is provided in the bottom surface of the front portion of the seat cushion, and a receiving member extending in the width direction of the seat cushion is disposed in the recess, and the receiving member is positioned in front of the vehicle. The portion near the receiving member of the seat cushion in a vehicle side view is configured by a low-rebound cushion material made of a material having a larger damping coefficient than other portions.

この構成によれば、通常着座時は、シートクッションが受止部材近傍部位を含めて柔らかいので座り心地が良く、一方急減速時には、乗員が慣性により高速で相対移動することでシートクッションの受止部材近傍部位が硬い物性を呈し、この硬くなった部位が受止部材の回動を促すことで乗員の前方移動を受止部材にて確実に拘束することができる。また、受止部材にシートクッションの硬くなった部位が係合するので、乗員の腰部は受圧面積の大きな硬くなった部位を介して受止部材にて受け止められ、乗員の腰部に入力する荷重が、この硬くなった部位によって効果的に吸収され、柔らかいシートクッションを介して受止部材のみで荷重を受け止める場合に比して乗員に対する障害値を大幅に低減することができる。   According to this configuration, the seat cushion is soft when it is seated, including the area near the receiving member, so that the seating comfort is good, while during sudden deceleration, the occupant moves relative to the seat cushion at high speed due to inertia. The vicinity of the member exhibits hard physical properties, and the hardened portion promotes the rotation of the receiving member, so that the forward movement of the occupant can be reliably restrained by the receiving member. Moreover, since the hardened part of the seat cushion is engaged with the receiving member, the occupant's waist is received by the receiving member through the hardened part having a large pressure receiving area, and the load input to the occupant's waist is The obstacle value for the occupant can be greatly reduced as compared to the case where the load is effectively absorbed by the hardened portion and the load is received only by the receiving member via the soft seat cushion.

また、低反発クッション材にて構成する部位が、車両側面視において受止部材の後端から後方の部位であると、硬くなった部位が受止部材の回動を促す際に、回動方向のシートクッションは柔らかいままなので、受止部材が前方上方に回動するのを阻害することがなく、より効果的に乗員の前方移動を受止部材にて拘束することができる。   Further, when the portion formed of the low-rebound cushioning material is a portion located rearward from the rear end of the receiving member in a side view of the vehicle, when the hardened portion prompts rotation of the receiving member, the rotation direction Since the seat cushion remains soft, it is possible to restrain the occupant's forward movement with the receiving member more effectively without hindering the receiving member from rotating forward and upward.

本発明の自動車用シートによれば、急減速時にシートクッションの凹部後面の略垂直面が前方に押され、受止部材が略垂直面にて前方に押されて前方上方に回動し、かつ略垂直面が上下に比較的長いので乗員の通常の着座時に受止部材が下方に下がり過ぎることがなく、乗員の前方移動を受止部材にて確実に拘束することができる。   According to the vehicle seat of the present invention, when the vehicle is suddenly decelerated, the substantially vertical surface of the rear surface of the recess of the seat cushion is pushed forward, the receiving member is pushed forward by the substantially vertical surface, and is rotated forward and upward. Since the substantially vertical surface is relatively long in the vertical direction, the receiving member does not fall down too much during normal seating of the occupant, and the occupant can be reliably restrained from moving forward by the receiving member.

以下、本発明の自動車用シートの各実施形態について、図１〜図７を参照して説明する。   Hereinafter, each embodiment of the automobile seat of the present invention will be described with reference to FIGS.

（第１の実施形態）
まず、本発明の第１の実施形態について、図１〜図５を参照して説明する。図１、図２において、１は自動車用シートのシートクッション、２はシートクッション１の鋼板製のフレーム部（図示せず）の上部に装着された発泡ウレタンなどのクッションパッドであり、クッションパッド２の外面は外装材（図示せず）にて被覆されている。クッションパッド２は、その下面の車両前後方向中間部ないし後部が、車幅方向に横架された複数のＳばね３にて支持されている。クッションパッド２の前部下面には、急減速時に乗員の腰部の前方への移動を抑制する移動抑制装置６を配設する凹部４が形成されている。凹部４の後面は、略垂直面５にて構成されている。 (First embodiment)
First, a first embodiment of the present invention will be described with reference to FIGS. 1 and 2, reference numeral 1 denotes a seat cushion of an automobile seat, and 2 denotes a cushion pad made of urethane foam or the like mounted on a steel plate frame portion (not shown) of the seat cushion 1, and the cushion pad 2 The outer surface of is covered with an exterior material (not shown). The cushion pad 2 is supported by a plurality of S springs 3 horizontally extending in the vehicle width direction at the vehicle longitudinal direction middle portion or rear portion of the lower surface of the cushion pad 2. On the lower surface of the front portion of the cushion pad 2, a recess 4 is formed in which a movement suppressing device 6 that suppresses the forward movement of the occupant's waist during sudden deceleration is formed. The rear surface of the recess 4 is constituted by a substantially vertical surface 5.

以下、移動抑制装置６の構成について詳細に説明する。移動抑制装置６を取り付けるため前記フレーム部（図示せず）の両側板にそれぞれ溶接にて一体固着された取付板（図示せず）に、第１の支軸ピン７と第２の支軸ピン８とストッパピン９の３本のピンが取付けられている。第１の支軸ピン７にて、揺動アーム１０の中間部が上下方向に揺動自在に軸支されている。揺動アーム１０は、斜め後方上方に延出された受止部材取付アーム部１１と斜め前方上方に延出された慣性マス取付アーム部１２とを有している。   Hereinafter, the configuration of the movement suppressing device 6 will be described in detail. A first support pin 7 and a second support pin are attached to mounting plates (not shown) integrally fixed to both side plates of the frame portion (not shown) by welding in order to attach the movement suppressing device 6. Three pins 8 and a stopper pin 9 are attached. An intermediate portion of the swing arm 10 is pivotally supported by the first support shaft pin 7 so as to be swingable in the vertical direction. The swing arm 10 includes a receiving member mounting arm portion 11 that extends obliquely rearward and upward, and an inertia mass mounting arm portion 12 that extends diagonally forward and upward.

左右の揺動アーム１０の受止部材取付アーム部１１の先端部間にわたってパイプ材から成る受止部材１３が横架され、受止部材１３がシートクッション１の凹部４の内部の前部で上下方向に移動自在に支持されている。受止部材１３の上方前方の揺動端は、受止部材取付アーム部１１の前端縁がストッパピン９に当接することによって規制されている。また、慣性マス取付アーム部１２の先端部間にわたって鋼板から成る慣性マス１４が横架されている。   A receiving member 13 made of a pipe material is laid across the front end of the receiving member mounting arm portion 11 of the left and right swinging arms 10, and the receiving member 13 is vertically moved at the front portion inside the recess 4 of the seat cushion 1. It is supported movably in the direction. The rocking end on the upper front side of the receiving member 13 is regulated by the front end edge of the receiving member mounting arm portion 11 coming into contact with the stopper pin 9. An inertia mass 14 made of a steel plate is laid across the tip of the inertia mass mounting arm portion 12.

第２の支軸ピン８にて、揺動アーム１０の後方に配置された振子部材１５の下端部が前後に揺動自在に枢支されている。また、この振子部材１５を後方に揺動付勢するばね１６と、その後方揺動端を規制するストッパ片（図示せず）が設けられている。   A lower end portion of a pendulum member 15 disposed behind the swing arm 10 is pivotally supported by the second spindle pin 8 so as to be swingable back and forth. Further, a spring 16 that swings and biases the pendulum member 15 backward and a stopper piece (not shown) that restricts the rear swing end are provided.

受止部材取付アーム部１１の下部は後方に延出され、その後端縁が第１の支軸ピン７の軸心を中心とする円弧状に形成されるとともに係合歯列１７が形成され、振子部材１５の前縁上部に、前方に揺動したときに係合歯列１７に噛み合う噛み合い歯１８が形成され、これら係合歯列１７と噛み合い歯１８にて受止部材取付アーム部１１の上方揺動は許容するが、下方揺動を阻止するラチェット機構が構成されている。かくして、急減速時には、振子部材１５が慣性力で前方に揺動して噛み合い歯１８が受止部材取付アーム部１１の係合歯列１７に係合し、受止部材１３の下方移動が阻止される。   The lower part of the receiving member mounting arm portion 11 extends rearward, the rear end edge thereof is formed in an arc shape centering on the axis of the first support shaft pin 7, and the engaging tooth row 17 is formed, On the upper front edge of the pendulum member 15, meshing teeth 18 that mesh with the engagement teeth row 17 when rocked forward are formed, and these engagement teeth row 17 and the meshing teeth 18 form the receiving member mounting arm portion 11. A ratchet mechanism that allows upward swinging but prevents downward swinging is configured. Thus, at the time of sudden deceleration, the pendulum member 15 swings forward due to the inertial force, and the meshing teeth 18 engage with the engagement teeth row 17 of the receiving member mounting arm portion 11 to prevent the downward movement of the receiving member 13. Is done.

また、揺動アーム１０の受止部材取付アーム部１１を上方前方に向けて揺動付勢するねじりばね１９が設けられ、受止部材１３が上方に移動付勢されている。なお、図１において、２０はシートクッション１上に着座した乗員の腰部であり、２０ａはその骨盤である。   In addition, a torsion spring 19 that swings and biases the receiving member mounting arm portion 11 of the swing arm 10 upward and forward is provided, and the receiving member 13 is moved and biased upward. In FIG. 1, reference numeral 20 denotes a waist part of an occupant seated on the seat cushion 1, and 20a denotes a pelvis thereof.

以上の構成によれば、自動車用シートのシートクッション１上に乗員が座ったときや乗員がペダル操作した時には、クッションパッド２が圧縮されながら下方に変位する。それに伴って、受止部材１３が、図１に仮想線で示す状態から実線で示すように、下方に押圧され、揺動アーム１０がねじりばね１９の付勢力に抗して容易に下方に向けて揺動することによって、受止部材１３は円滑に下方後方に移動し、そのため乗員が違和感を感じたり、座り心地が悪化するようなことはない。また、振子部材１５がばね１６の付勢力で後方に移動付勢され、前方に揺動することはないので、通常使用時に不測に受止部材１３の下降動作が阻止されて座り心地が悪化するようなこともない。   According to the above configuration, when the occupant sits on the seat cushion 1 of the automobile seat or when the occupant operates the pedal, the cushion pad 2 is displaced downward while being compressed. Accordingly, the receiving member 13 is pressed downward as shown by a solid line from the state indicated by the phantom line in FIG. 1, and the swing arm 10 is easily directed downward against the biasing force of the torsion spring 19. By swinging, the receiving member 13 smoothly moves downward and rearward, so that the passenger does not feel uncomfortable or does not deteriorate the sitting comfort. Further, since the pendulum member 15 is urged to move backward by the urging force of the spring 16 and does not swing forward, the lowering operation of the receiving member 13 is unexpectedly prevented during normal use, and the sitting comfort is deteriorated. There is no such thing.

この状態でクッションパッド２の下面に形成した凹部４の後面の略垂直面５に受止部材１３が当接又は近接した状態となる。また、その際に略垂直面５の高さ寸法を受止部材１３の高さ寸法より大きく設定することによって、乗員の着座位置や体格に左右されず、乗員の通常の着座時に受止部材１３が下方に下がり過ぎることがない。   In this state, the receiving member 13 is in contact with or close to the substantially vertical surface 5 of the rear surface of the recess 4 formed on the lower surface of the cushion pad 2. In this case, by setting the height dimension of the substantially vertical surface 5 to be larger than the height dimension of the receiving member 13, the receiving member 13 is not affected by the seating position or physique of the occupant and is normally seated by the occupant. Does not fall too low.

また、ねじりばね１９にて上方に揺動付勢された受止部材１３がＳばね３と同様の機能を奏し、これら受止部材１３とＳばね３にてクッションパッド２を介して乗員の腰部２０を支持するようにしているので、比較的薄いクッションパッド２を用いても乗員の腰部２０全体を快適なクッション性を持って支持することができる。   Further, the receiving member 13 oscillated and biased upward by the torsion spring 19 has the same function as the S spring 3, and the lumbar region of the occupant is interposed between the receiving member 13 and the S spring 3 via the cushion pad 2. 20 is supported, the entire waist 20 of the occupant can be supported with a comfortable cushioning property even if a relatively thin cushion pad 2 is used.

一方、自動車が前面衝突して急減速が発生したときには、まず初期段階で振子部材１５が慣性力によってばね１６の付勢力に抗して第２の支軸ピン８回りに前方に揺動し、その前縁の噛み合い歯１８が受止部材取付アーム部１１の後縁の係合歯列１７に噛み合い、受止部材取付アーム部１１の下方への揺動に対するロックが開始され、受止部材１３の下方移動が阻止される。その状態で自動車車体の急減速がピークとなった段階で、受止部材１３に作用する慣性力によって受止部材１３を前方上方に押し上げる力が作用するとともに、図２に示すように、乗員の腰部２０が矢印ａの如く前方に移動するのに伴ってクッションパッド２も前方に押され、凹部４後面の略垂直面５にて矢印ｂの如く受止部材１３が前方に押されることによって、受止部材１３の前方上方への回動が促される。さらに、図１に示した構成例では慣性マス１４に作用する慣性力によって慣性マス１４が前方に向けて移動するのに連動して受止部材１３を前方上方に押し上げる力が付加され、受止部材１３がさらに強く前方上方に押し上げられる。   On the other hand, when the automobile collides with the front and sudden deceleration occurs, first, the pendulum member 15 swings forward around the second spindle pin 8 against the urging force of the spring 16 by the inertial force, The meshing teeth 18 on the front edge mesh with the engagement tooth row 17 on the rear edge of the receiving member mounting arm portion 11, and the locking against the downward swing of the receiving member mounting arm portion 11 is started. Is prevented from moving downward. In this state, when the sudden deceleration of the vehicle body reaches a peak, the inertial force acting on the receiving member 13 exerts a force that pushes the receiving member 13 forward and upward, and as shown in FIG. As the waist 20 moves forward as indicated by the arrow a, the cushion pad 2 is also pushed forward, and the receiving member 13 is pushed forward as indicated by the arrow b on the substantially vertical surface 5 of the rear surface of the recess 4. The receiving member 13 is urged to turn upward in the forward direction. Further, in the configuration example shown in FIG. 1, a force that pushes up the receiving member 13 upward in conjunction with the movement of the inertial mass 14 toward the front by the inertial force acting on the inertial mass 14 is added. The member 13 is further strongly pushed upward.

かくして、急減速によって乗員の腰部２０が前方に移動しようとしても、腰部２０が受止部材１３によって確実に受け止められる。また、急減速時に乗員の腰部２０が前方に移動しようとして受止部材１３に後方から前向きに力が加わると、受止部材１３を上方に向けて揺動させる分力が作用するため、受止部材１３によって乗員の腰部２０の前方移動をさらに確実に抑制することができる。さらに、受止部材１３の弾性変形にて乗員の前方への移動エネルギーが吸収され、前方移動量が抑制される。   Thus, even if the occupant's waist 20 moves forward due to sudden deceleration, the waist 20 is reliably received by the receiving member 13. Further, when a force is applied to the receiving member 13 from the rear to the front when the occupant's waist 20 moves forward during sudden deceleration, a component force that swings the receiving member 13 upward acts. The member 13 can more reliably suppress the forward movement of the occupant's waist 20. Further, the movement energy forward of the occupant is absorbed by the elastic deformation of the receiving member 13, and the amount of forward movement is suppressed.

なお、クッションパッド２の下面に形成する凹部４の形状としては、図１、図２に示したように、受止部材１３の前後及び上下に空間が形成される形状に限定されるものではなく、例えば図３に示すように、受止部材１３が余裕を持って丁度嵌り込むような形状に形成しても良い。   The shape of the recess 4 formed on the lower surface of the cushion pad 2 is not limited to the shape in which spaces are formed before and after the receiving member 13 and above and below, as shown in FIGS. For example, as shown in FIG. 3, the receiving member 13 may be formed in a shape that fits with a margin.

また、図１の例では、凹部４が基本的にクッションパッド２の略全幅にわたってほぼ同一断面形状となっている例を示したが、図４（ｃ）に示すように、凹部４を車両正面視において円弧形状とし、幅方向中央部で凹部４の深さが深く、両端部で浅くなるように形成し、シートクッション１上に乗員が着座しない状態では、図４（ａ）、（ｂ）に示すように、受止部材１３が凹部４の直下に位置するように配設し、シートクッション１上に乗員が着座したときに、クッションパッド２の中央部がより大きく圧縮されながら下方に変位することで、図５（ａ）、（ｂ）に示すように、凹部４内に丁度受止部材１３が嵌り込み、凹部４の後面の略垂直面５に受止部材１３が当接する又は近接するように構成することもできる。   In the example of FIG. 1, the example in which the concave portion 4 has basically the same cross-sectional shape over substantially the entire width of the cushion pad 2 is shown. However, as shown in FIG. 4 (a) and 4 (b) in a state in which the shape is an arc shape, the recess 4 is deep at the center in the width direction and shallow at both ends, and no occupant is seated on the seat cushion 1. As shown in FIG. 2, the receiving member 13 is disposed so as to be positioned immediately below the recess 4, and when the occupant sits on the seat cushion 1, the center portion of the cushion pad 2 is displaced downward while being compressed more greatly. By doing so, as shown in FIGS. 5A and 5B, the receiving member 13 just fits in the recess 4 and the receiving member 13 comes into contact with or is close to the substantially vertical surface 5 on the rear surface of the recess 4. It can also be configured to.

このように構成すると、クッションパッド２をえぐって形成する凹部４を必要最小限に形成することができるとともに、乗員の着座時に受止部材１３が大きく押し下げられることがないにもかかわらず、凹部４の後面の略垂直面５が受止部材１３の後部に確実に対向するので、座り心地を損なうことなく、上記急減速時の乗員拘束作用を確実に奏することができて好適である。   With this configuration, the concave portion 4 formed around the cushion pad 2 can be formed to the minimum necessary, and the concave portion 4 can be formed even though the receiving member 13 is not largely pushed down when the occupant is seated. Since the substantially vertical surface 5 of the rear surface reliably faces the rear portion of the receiving member 13, it is preferable that the occupant restraining action at the time of sudden deceleration can be reliably performed without impairing the sitting comfort.

（第２の実施形態）
次に、本発明の自動車用シートの第２の実施形態について図６、図７を参照して説明する。なお、上記第１の実施形態と同一の構成要素については同じ参照符号を付して説明を省略し、相違点のみを説明する。 (Second Embodiment)
Next, a second embodiment of the automobile seat of the present invention will be described with reference to FIGS. Note that the same components as those in the first embodiment are denoted by the same reference numerals, description thereof is omitted, and only differences are described.

上記第１の実施形態では、シートクッション１の着座時の座り心地を良くするために、クッションパッド２の全体を柔らかい材料にて構成したので、急減速時に受止部材１３が持ち上がった状態でも、その受止部材１３と乗員の腰部２０との間に柔らかい層が介在することで受止部材１３による拘束タイミングが遅れることになり、拘束力が十分に発揮され難いという問題がある。そこで本実施形態では、図６に示すように、車両側面視においてクッションパッド２の受止部材１３の近傍部位、すなわち凹部４前後の適当範囲にわたって、他の部位よりも減衰係数の大きい材質から成る低反発クッション材２１にて構成している。低反発クッション材２１とは、減衰係数が大きく、ゆっくり押せば容易に撓むが、速く押せば撓み難い特性を有する材質からなるものである。   In the first embodiment, in order to improve the sitting comfort when the seat cushion 1 is seated, the entire cushion pad 2 is made of a soft material, so even when the receiving member 13 is lifted during sudden deceleration, Since the soft layer is interposed between the receiving member 13 and the occupant's waist 20, the restraining timing by the receiving member 13 is delayed, and there is a problem that it is difficult to sufficiently exert the restraining force. Therefore, in the present embodiment, as shown in FIG. 6, the vehicle is made of a material having a larger attenuation coefficient than other portions over a suitable region in the vicinity of the receiving member 13 of the cushion pad 2, that is, before and after the recess 4 in the side view of the vehicle. The low-rebound cushion material 21 is used. The low resilience cushion material 21 is made of a material having a large damping coefficient and is easily bent when pressed slowly but hardly bent when pressed quickly.

この構成によれば、通常着座時は、シートクッション１が受止部材１３の近傍部位を含めて柔らかいので座り心地が良く、一方急減速時には、乗員が慣性により高速で相対移動することでクッションパッド２の受止部材１３の近傍部位が硬い物性を呈し、この硬くなった部位が受止部材１３の回動を促すことで、乗員の前方移動を受止部材１３にて確実に拘束することができる。また、受止部材１３にクッションパッド２の硬くなった部位が係合するので、乗員の腰部２０は受圧面積の大きな硬くなった部位を介して受止部材１３にて受け止められるので、乗員の腰部２０に入力する荷重が、この硬くなった部位によって効果的に吸収され、柔らかいクッションパッド２を介して受止部材１３のみで荷重を受け止める場合に比して乗員に対する障害値を大幅に低減することができる。   According to this configuration, the seat cushion 1 is soft including the vicinity of the receiving member 13 during normal sitting, so that the seating comfort is good. On the other hand, during sudden deceleration, the occupant moves relative to the cushion pad at high speed due to inertia. The vicinity of the second receiving member 13 exhibits hard physical properties, and the hardened portion promotes the rotation of the receiving member 13, so that the forward movement of the occupant can be reliably restrained by the receiving member 13. it can. Further, since the hardened portion of the cushion pad 2 is engaged with the receiving member 13, the occupant's waist 20 is received by the receiving member 13 through the hardened portion having a large pressure receiving area. The load input to 20 is effectively absorbed by the hardened portion, and the obstacle value for the occupant is greatly reduced as compared with the case where the load is received only by the receiving member 13 via the soft cushion pad 2. Can do.

図６に示した例では、クッションパッド２の低反発クッション材２１の配設部位として、受止部材１３の前後の範囲に設定した例を示したが、図７に示すように、低反発クッション材２１の配設部位を、車両側面視において受止部材１３の後端から後方の部位に限定した構成とすることもできる。   In the example shown in FIG. 6, the example in which the low repulsion cushion material 21 of the cushion pad 2 is disposed in the front and rear ranges of the receiving member 13 is shown. However, as shown in FIG. The arrangement | positioning site | part of the material 21 can also be set as the structure limited to the back site | part from the rear end of the receiving member 13 in the vehicle side view.

このように構成すると、急減速時に硬くなった低反発クッション材２１にて受止部材１３の回動を促す際に、回動方向のクッションパッド２は柔らかいままなので、受止部材１３が前方上方に回動するのを阻害することがなく、より効果的に乗員の前方移動を受止部材にて拘束することができる。   If comprised in this way, when the rotation of the receiving member 13 is urged by the low-rebound cushioning material 21 that has become hard during sudden deceleration, the cushion pad 2 in the rotating direction remains soft, so Therefore, it is possible to restrain the occupant's forward movement with the receiving member more effectively.

以上の各実施形態では、急減速時に揺動アーム１０が揺動し、受止部材１３が上方に揺動した状態でロックして下方に移動するのを防止する振子部材１５を設けた例を示したが、本発明では略垂直面５にて受止部材１３を押して前方上方への回動を促すようにしているので、必ずしも振子部材１５などのロック手段を設けなくても良い。また、急減速時に慣性マス１４により発生する慣性力によって受止部材１３を積極的に上方に移動させるようにしているが、必ずしも慣性マス１４は設けなくても良い。ただし、これらを組み合わせることで、より効果的に乗員の前方移動を受止部材にて拘束することができる。   In each of the above embodiments, an example in which the pendulum member 15 is provided that prevents the swinging arm 10 from swinging during sudden deceleration and preventing the receiving member 13 from moving downward while locking the receiving member 13 swinging upward. Although shown in the present invention, the receiving member 13 is pushed on the substantially vertical surface 5 to promote the upward rotation of the front, so that the locking means such as the pendulum member 15 is not necessarily provided. Further, although the receiving member 13 is positively moved upward by the inertial force generated by the inertial mass 14 at the time of sudden deceleration, the inertial mass 14 is not necessarily provided. However, by combining these, the forward movement of the occupant can be more effectively restrained by the receiving member.

本発明は、急減速時にシートクッションの凹部後面の略垂直面が前方に押されることで、この略垂直面にて受止部材が前方に押されて前方上方に回動し、かつ略垂直面は上下に比較的長いので乗員の通常の着座時に受止部材が下方に下がり過ぎることがなく、乗員の前方移動を受止部材にて確実に拘束することができるため、自動車用シートの安全機構に有用である。   According to the present invention, when the vehicle is suddenly decelerated, the substantially vertical surface of the rear surface of the recessed portion of the seat cushion is pushed forward, and the receiving member is pushed forward by this substantially vertical surface to rotate upward and the substantially vertical surface. Is relatively long in the vertical direction, so that the receiving member does not fall down too much during normal seating of the occupant, and the forward movement of the occupant can be reliably restrained by the receiving member. Useful for.

本発明の自動車用シートの第１の実施形態の要部構成を示す縦断側面図である。It is a vertical side view which shows the principal part structure of 1st Embodiment of the vehicle seat of this invention. 同実施形態の作用説明図である。It is operation | movement explanatory drawing of the embodiment. 同実施形態の凹部の変形例の作用説明図である。It is operation | movement explanatory drawing of the modification of the recessed part of the embodiment. 同実施形態の他の構成例を示し、（ａ）は正面図、（ｂ）は（ａ）のＡ−Ａ断面図、（ｃ）はクッションパッドを下方から見た斜視図である。The other structural example of the embodiment is shown, (a) is a front view, (b) is an AA cross-sectional view of (a), and (c) is a perspective view of the cushion pad as viewed from below. 同構成例における着座状態を示し、（ａ）は正面図、（ｂ）は（ａ）のＢ−Ｂ断面図である。The seating state in the same structural example is shown, (a) is a front view, (b) is a BB cross-sectional view of (a). 本発明の自動車用シートの第２の実施形態の要部構成を示す縦断側面図である。It is a vertical side view which shows the principal part structure of 2nd Embodiment of the vehicle seat of this invention. 同実施形態の他の構成例の要部構成を示す縦断側面図である。It is a vertical side view which shows the principal part structure of the other structural example of the same embodiment. 従来例の自動車用シートの要部構成を示す縦断側面図である。It is a vertical side view which shows the principal part structure of the vehicle seat of a prior art example.

符号の説明Explanation of symbols

１ シートクッション
２ クッションパッド
４ 凹部
５ 略垂直面
６ 移動抑制装置
７ 第１の支軸ピン
１３ 受止部材
２１ 低反発クッション材 DESCRIPTION OF SYMBOLS 1 Seat cushion 2 Cushion pad 4 Recessed part 5 Substantially vertical surface 6 Movement suppression apparatus 7 1st spindle pin 13 Receiving member 21 Low-resilience cushioning material

Claims (4)

シートクッションの前部底面に凹部を設け、この凹部内にシートクッションの幅方向に延びる受止部材を配設するとともに、この受止部材を車両前方に位置する軸回りに回動可能に支持し、前記凹部の車両後方面を略垂直面にて構成するとともに、その略垂直面の上下方向寸法を受止部材の高さ以上としたことを特徴とする自動車用シート。   A recess is formed in the bottom surface of the front portion of the seat cushion, and a receiving member extending in the width direction of the seat cushion is disposed in the recess, and the receiving member is supported so as to be rotatable around an axis positioned in front of the vehicle. The vehicle seat is characterized in that the vehicle rear surface of the concave portion is constituted by a substantially vertical surface, and the vertical dimension of the substantially vertical surface is equal to or greater than the height of the receiving member. 凹部が車両正面視において円弧形状であることを特徴とする請求項１記載の自動車用シート。   The automobile seat according to claim 1, wherein the recess has an arc shape when viewed from the front of the vehicle. シートクッションの前部底面に凹部を設け、この凹部内にシートクッションの幅方向に延びる受止部材を配設するとともに、この受止部材を車両前方に位置する軸回りに回動可能に支持し、車両側面視においてシートクッションの受止部材近傍部位を、他の部位よりも減衰係数の大きい材質から成る低反発クッション材にて構成したことを特徴とする自動車用シート。   A recess is formed in the bottom surface of the front portion of the seat cushion, and a receiving member extending in the width direction of the seat cushion is disposed in the recess, and the receiving member is supported so as to be rotatable around an axis positioned in front of the vehicle. An automobile seat comprising a seat cushion receiving member and its vicinity in a side view of the vehicle made of a low-rebound cushion material made of a material having a larger damping coefficient than other parts. 低反発クッション材にて構成する部位が、車両側面視において受止部材の後端から後方の部位であることを特徴とする請求項３記載の自動車用シート。   4. The automobile seat according to claim 3, wherein the portion formed of the low-rebound cushioning material is a rear portion from the rear end of the receiving member in a side view of the vehicle.
JP2005244576A 2005-08-25 2005-08-25 Automotive seat Expired - Fee Related JP4744236B2 (en)

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Cited By (2)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
WO2013022069A1 (en) * 2011-08-11 2013-02-14 株式会社ブリヂストン Impact absorber and method for producing impact absorber
CN112550095A (en) * 2020-11-10 2021-03-26 浙江合众新能源汽车有限公司 Reinforced anti-diving and anti-sliding structure for rear seats of automobile

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CN103732940B (en) * 2011-08-11 2015-07-22 株式会社普利司通 Impact absorber and method for producing impact absorber
CN112550095A (en) * 2020-11-10 2021-03-26 浙江合众新能源汽车有限公司 Reinforced anti-diving and anti-sliding structure for rear seats of automobile
CN112550095B (en) * 2020-11-10 2021-12-10 浙江合众新能源汽车有限公司 Reinforced anti-diving and anti-sliding structure for rear seats of automobile

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