JP6039289B2

JP6039289B2 - Vehicle seat lock device

Info

Publication number: JP6039289B2
Application number: JP2012170093A
Authority: JP
Inventors: 島　和憲; 和憲島
Original assignee: Toyo Seat Co Ltd
Current assignee: Toyo Seat Co Ltd
Priority date: 2012-07-31
Filing date: 2012-07-31
Publication date: 2016-12-07
Anticipated expiration: 2032-07-31
Also published as: JP2014029077A

Description

本発明は、車両のシートバックに設けられて該シートバックを車体側部材に固定保持する車両用シートロック装置に関する。 The present invention relates to a vehicle seat lock device that is provided on a seat back of a vehicle and fixes and holds the seat back to a vehicle body side member.

従来より、車両用シートロック装置においては、例えば特許文献１のように、車体側にシートバックの起倒方向に沿って第１及び第２係合軸が並設されたストライカが固定され、シートバック側にロックアッセンブリが取付けられたものが知られている。このロックアッセンブリは、ストライカの第１及び第２係合軸に選択的に係合して、シートバックを第１起立位置及び第１起立位置よりも傾倒側の第２起立位置に保持し得るフック部材を有している。 2. Description of the Related Art Conventionally, in a vehicle seat lock device, a striker in which first and second engagement shafts are juxtaposed along a seat back raising / lowering direction on a vehicle body side is fixed as in Patent Document 1, for example. One having a lock assembly attached to the back side is known. The lock assembly selectively engages with the first and second engaging shafts of the striker to hold the seat back in the first standing position and the second standing position inclined to the first standing position. It has a member.

このシートバックを第１起立位置に保持する際は、ストライカの第１係合軸がフック部材の第１係合溝に係合し、また、第２起立位置に保持する際は、ストライカの第２係合軸がフック部材の第１係合溝に係合するとともに、ストライカの第１係合軸がフック部材の第２係合溝に遊嵌するようになっている。 When the seat back is held in the first standing position, the first engagement shaft of the striker is engaged with the first engagement groove of the hook member, and when the seat back is held in the second standing position, the striker's first engagement shaft is engaged. The two engagement shafts engage with the first engagement groove of the hook member, and the first engagement shaft of the striker is loosely fitted into the second engagement groove of the hook member.

また、このシートバックを前側の倒伏位置から第１起立位置に後回りに変位させる際は、ストライカの第１係合軸をフック部材の外縁に当接させ、フック部材を上方に回動させることにより第１起立位置に変位させる。 Further, when the seat back is displaced backward from the front lying position to the first standing position, the first engaging shaft of the striker is brought into contact with the outer edge of the hook member and the hook member is rotated upward. Is displaced to the first standing position.

そして、このシートバックを第１起立位置または第２起立位置から倒伏位置に前回りに変位させる際は、操作ノブによりフック部材を上方に回動させ、ストライカの係合軸をフック部材の係合溝から離脱可能とし、この状態でシートバックを前方に倒伏移動させる作動となっている。 Then, when the seat back is displaced forward from the first standing position or the second standing position to the lying position, the hook member is rotated upward by the operation knob, and the striker engagement shaft is engaged with the hook member. The seat back can be detached from the groove, and in this state, the seat back is moved forward and down.

特開２００７−１９６７１７号公報JP 2007-196717 A

しかし、特許文献１の車両用シートロック装置では、シートバックを第１起立位置または第２起立位置から倒伏位置へ変位させる際に、ストライカの係合軸をフック部材の係合溝から離脱させた後、シートバックを手動で前方に倒伏移動させる必要がある。かかる場合、上記第１起立位置または第２起立位置にあるシートバックは車両後方側に後傾しているため、一旦車両前方側に引き起こしてから倒すこととなり、一定の力を要する。よって、特に、荷物で片手が塞がっている場合や、女性や年配の者にとっては操作し難い場合がある。 However, in the vehicle seat lock device disclosed in Patent Document 1, when the seat back is displaced from the first standing position or the second standing position to the lying position, the striker engagement shaft is separated from the hook member engagement groove. Later, it is necessary to manually move the seat back forward. In such a case, since the seat back in the first standing position or the second standing position is inclined rearward to the vehicle rear side, the seat back is temporarily tilted after being raised to the vehicle front side, and a certain force is required. Therefore, in particular, there are cases where one hand is closed with luggage, or it is difficult for a woman or an elderly person to operate.

本発明は、かかる点に鑑みてなされたものであり、その目的とするところは、シートバックの第１起立位置または第２起立位置から倒伏位置への移動が容易な車両用シートロック装置を提供することにある。 The present invention has been made in view of such a point, and an object of the present invention is to provide a vehicle seat lock device in which the seat back can be easily moved from the first standing position or the second standing position to the lying position. There is to do.

上記の目的を達成するために、本発明は、車両用シートロック装置におけるシートバックの所定の位置への移動を容易にする工夫を設けたことを特徴とする。 In order to achieve the above object, the present invention is characterized in that a device for facilitating movement of a seat back to a predetermined position in a vehicle seat lock device is provided.

具体的には、第１の発明は、車体に起倒可能に支持されたシートバックを、第１起立位置及び該第１起立位置よりも傾倒側の第２起立位置に保持可能な車両用シートロック装置であって、車体側に固定され、第１係合軸と、該第１係合軸よりも傾倒側に位置する第２係合軸とが上記シートバックの起倒方向に沿って並設されたストライカと、上記シートバック側に取付けられ、上記ストライカが進入して係合するロックアッセンブリとを備え、該ロックアッセンブリは、上記シートバックに固定されたベースプレートと、基部が該ベースプレートに水平方向の軸心をもって回動可能に支持されたフック部材と、基部がベースプレートに水平方向の軸心をもって回動可能に支持されたアシスト部材とを備え、上記フック部材には、上記シートバックを上記第１起立位置に保持する際は上記ストライカの第１係合軸が係合する一方、上記第２起立位置に保持する際は上記第２係合軸が係合する第１係合溝と、該第１係合溝よりもストライカ進入方向側に位置し、かつ上記シートバックを第２起立位置に保持する際は上記第１係合軸が遊嵌する第２係合溝とが、上記ストライカの進入方向に沿って並設され、上記アシスト部材には、上記ストライカの上記第１係合軸に当接可能な当接部と、上記ストライカが上記ロックアッセンブリに進入していない状態において上記フック部材と当接し、上記フック部材の下方向への回動を規制する規制部とが形成され、上記アシスト部材は、上記当接部が上記ストライカの反進入方向に向かうように付勢されている。 Specifically, the first invention is a vehicle seat capable of holding a seat back supported by a vehicle body so as to be able to rise and fall in a first standing position and a second standing position tilted with respect to the first standing position. A locking device, which is fixed to the vehicle body side, and includes a first engagement shaft and a second engagement shaft positioned on a tilt side with respect to the first engagement shaft along a tilting direction of the seat back. A striker provided on the seat back side, and a lock assembly into which the striker enters and engages. The lock assembly includes a base plate fixed to the seat back, and a base portion horizontally to the base plate. A hook member rotatably supported by a direction axis, and an assist member having a base portion rotatably supported by the base plate with a horizontal axis. The hook member includes the seat bar. The first engagement shaft of the striker engages when the hook is held in the first standing position, while the second engagement shaft engages when the striker is held in the second standing position. A groove, and a second engagement groove that is positioned closer to the striker entry direction than the first engagement groove and in which the first engagement shaft is loosely fitted when the seat back is held in the second standing position. The assist member is arranged in parallel along the approach direction of the striker, and the assist member is in contact with the first engagement shaft of the striker, and the striker has not entered the lock assembly. And a restricting portion for restricting downward rotation of the hook member is formed, and the assist member is urged so that the abutting portion is directed in the counter-entry direction of the striker. that has been.

さらに、上記アシスト部材の規制部は、上記ストライカが上記ロックアッセンブリに進入していない状態にあるとき、上記フック部材の第１係合溝と第２係合溝との間に位置する突出部と当接して、該フック部材のストライカ反進入方向側の下端を、該ストライカの第１及び第２係合軸の中心が描く移動軌跡よりも上方に保持するように形成されていることを特徴とする。 Further, the restricting portion of the assist member includes a protruding portion positioned between the first engagement groove and the second engagement groove of the hook member when the striker is not in the lock assembly. The hook member is formed so as to hold the lower end of the hook member on the side opposite to the striker in the direction of the striker above a movement locus drawn by the centers of the first and second engagement shafts of the striker. To do.

第２の発明は、第１の発明と同様に、車体に起倒可能に支持されたシートバックを、第１起立位置及び該第１起立位置よりも傾倒側の第２起立位置に保持可能な車両用シートロック装置であって、車体側に固定され、第１係合軸と、該第１係合軸よりも傾倒側に位置する第２係合軸とが上記シートバックの起倒方向に沿って並設されたストライカと、上記シートバック側に取付けられ、上記ストライカが進入して係合するロックアッセンブリとを備え、該ロックアッセンブリは、上記シートバックに固定されたベースプレートと、基部が該ベースプレートに水平方向の軸心をもって回動可能に支持されたフック部材と、基部がベースプレートに水平方向の軸心をもって回動可能に支持されたアシスト部材とを備え、上記フック部材には、上記シートバックを上記第１起立位置に保持する際は上記ストライカの第１係合軸が係合する一方、上記第２起立位置に保持する際は上記第２係合軸が係合する第１係合溝と、該第１係合溝よりもストライカ進入方向側に位置し、かつ上記シートバックを第２起立位置に保持する際は上記第１係合軸が遊嵌する第２係合溝とが、上記ストライカの進入方向に沿って並設され、上記アシスト部材には、上記ストライカの上記第１係合軸に当接可能な当接部と、上記ストライカが上記ロックアッセンブリに進入していない状態において上記フック部材と当接し、上記フック部材の下方向への回動を規制する規制部とが形成され、上記アシスト部材は、上記当接部が上記ストライカの反進入方向に向かうように付勢されている。そして、上記フック部材の基部外縁には、外側に突出した係合片が形成されている一方、上記アシスト部材の規制部には、上記係合片と係合可能な爪部が形成され、該フック部材の係合片と該アシスト部材の爪部とが係合することにより、該フック部材のストライカ反進入方向側の下端を該ストライカの移動軌跡よりも上方に保持することを特徴とする。 As in the first invention, the second invention can hold the seat back supported by the vehicle body so as to be able to rise and fall in the first standing position and the second standing position inclined to the first standing position. A seat lock device for a vehicle, the first engagement shaft being fixed to the vehicle body side and a second engagement shaft positioned on a tilt side with respect to the first engagement shaft is arranged in a tilting direction of the seat back. And a lock assembly that is attached to the seat back side and that the striker enters and engages, the lock assembly including a base plate fixed to the seat back and a base portion A hook member rotatably supported on the base plate with a horizontal axis; and an assist member having a base portion rotatably supported on the base plate with a horizontal axis. The first engagement shaft of the striker is engaged when the toeback is held at the first standing position, while the second engagement shaft is engaged when the strikeback is held at the second standing position. A groove, and a second engagement groove that is positioned closer to the striker entry direction than the first engagement groove and in which the first engagement shaft is loosely fitted when the seat back is held in the second standing position. The assist member is arranged in parallel along the approach direction of the striker, and the assist member is in contact with the first engagement shaft of the striker, and the striker has not entered the lock assembly. And a restricting portion for restricting downward rotation of the hook member is formed, and the assist member is urged so that the abutting portion is directed in the counter-entry direction of the striker. Has been. Then, the base outer edge of the hook member, while the engagement pieces projecting outward is formed in the restricting portion of the assist member, the engaging piece can be engaged with the claw portion is formed, the By engaging the engaging piece of the hook member with the claw portion of the assist member, the lower end of the hook member on the side opposite to the striker is held above the movement trajectory of the striker.

第３の発明は、第１の発明と同様に、車体に起倒可能に支持されたシートバックを、第１起立位置及び該第１起立位置よりも傾倒側の第２起立位置に保持可能な車両用シートロック装置であって、車体側に固定され、第１係合軸と、該第１係合軸よりも傾倒側に位置する第２係合軸とが上記シートバックの起倒方向に沿って並設されたストライカと、上記シートバック側に取付けられ、上記ストライカが進入して係合するロックアッセンブリとを備え、該ロックアッセンブリは、上記シートバックに固定されたベースプレートと、基部が該ベースプレートに水平方向の軸心をもって回動可能に支持されたフック部材と、基部がベースプレートに水平方向の軸心をもって回動可能に支持されたアシスト部材とを備え、上記フック部材には、上記シートバックを上記第１起立位置に保持する際は上記ストライカの第１係合軸が係合する一方、上記第２起立位置に保持する際は上記第２係合軸が係合する第１係合溝と、該第１係合溝よりもストライカ進入方向側に位置し、かつ上記シートバックを第２起立位置に保持する際は上記第１係合軸が遊嵌する第２係合溝とが、上記ストライカの進入方向に沿って並設され、上記アシスト部材には、上記ストライカの上記第１係合軸に当接可能な当接部と、上記ストライカが上記ロックアッセンブリに進入していない状態において上記フック部材と当接し、上記フック部材の下方向への回動を規制する規制部とが形成され、上記アシスト部材は、上記当接部が上記ストライカの反進入方向に向かうように付勢されている。そして、上記ベースプレートには、上記アシスト部材に当接して該アシスト部材の上記ストライカ反進入方向への回動を規制するストッパーが設けられていることを特徴とする。 As in the first invention, the third invention can hold the seat back supported by the vehicle body so as to be able to rise and fall in the first standing position and the second standing position tilted with respect to the first standing position. A seat lock device for a vehicle, the first engagement shaft being fixed to the vehicle body side and a second engagement shaft positioned on a tilt side with respect to the first engagement shaft is arranged in a tilting direction of the seat back. And a lock assembly that is attached to the seat back side and that the striker enters and engages, the lock assembly including a base plate fixed to the seat back and a base portion A hook member rotatably supported on the base plate with a horizontal axis; and an assist member having a base portion rotatably supported on the base plate with a horizontal axis. The first engagement shaft of the striker is engaged when the toeback is held at the first standing position, while the second engagement shaft is engaged when the strikeback is held at the second standing position. A groove, and a second engagement groove that is positioned closer to the striker entry direction than the first engagement groove and in which the first engagement shaft is loosely fitted when the seat back is held in the second standing position. The assist member is arranged in parallel along the approach direction of the striker, and the assist member is in contact with the first engagement shaft of the striker, and the striker has not entered the lock assembly. And a restricting portion for restricting downward rotation of the hook member is formed, and the assist member is urged so that the abutting portion is directed in the counter-entry direction of the striker. Has been. Then, the base plate is characterized in that a stopper which abuts on the assist member for restricting the rotation of the said striker anti entering direction of the assist member is provided.

第１の発明では、ロックアッセンブリは、ストライカの第１係合軸に当接可能な当接部が形成されたアシスト部材を備えており、該アシスト部材は、基部が回動可能に支持され、かつ当接部がストライカの反進入方向に向かうように付勢されている。シートバックを起立位置から車両前方側へ倒伏させる場合、アシスト部材はその付勢力により当接部がストライカの第１係合軸に当接しつつ押してシートバックを倒伏位置に変位させる方向へ作用することとなる。そのため、シートバックは、アシスト部材によりストライカ反進入方向への付勢力を享受することができる。その付勢力により、シートバックを起立位置から倒伏位置へ軽い力で容易に変位させることができる。また、アシスト部材は基部が回動可能に支持されて回動付勢されているため、シートバックを倒伏位置から起立位置に変位させる場合において、アシスト部材の当接部にストライカの第１係合軸が当接した際の衝撃力を緩和することができ、アシスト部材の当接部とストライカの第１係合軸との緩衝音を効果的に低減させることができる。 In the first invention, the lock assembly includes an assist member formed with an abutting portion capable of abutting against the first engagement shaft of the striker, and the assist member is supported so that the base portion is rotatable, And the contact part is urged | biased so that it may go to the anti-entry direction of a striker. When the seat back is lowered from the standing position to the front side of the vehicle, the assist member acts in such a direction that the abutting portion is pressed against the first engagement shaft of the striker while being pushed by the urging force to displace the seat back to the lying position. It becomes. Therefore, the seat back can enjoy the urging force in the striker counter approaching direction by the assist member. By the urging force, the seat back can be easily displaced from the standing position to the lying position with a light force. In addition, since the assist member is pivotally supported with the base portion being pivotable, when the seat back is displaced from the lying position to the standing position, the first engagement of the striker with the contact portion of the assist member The impact force when the shaft abuts can be reduced, and the buffering noise between the abutting portion of the assist member and the first engagement shaft of the striker can be effectively reduced.

さらに、アシスト部材に形成された規制部は、シートバックが倒伏位置にある状態において、フック部材の第１係合溝と第２係合溝との間に形成された突出部と当接して、フック部材のストライカ反進入方向側の下端をストライカの移動軌跡（第１及び第２係合軸の中心が描く移動軌跡）よりも上方に保持するよう形成されている。それにより、シートバックを倒伏位置から起立位置に変位させる際に、フック部材を上方に大きく押し上げてストライカを進入させる必要がなく、軽い力で容易に変位させることができる。 Further, the restricting portion formed on the assist member is in contact with the protruding portion formed between the first engaging groove and the second engaging groove of the hook member in a state where the seat back is in the lying position, The lower end of the hook member on the side opposite to the striker is formed so as to be held above the movement locus of the striker (movement locus drawn by the centers of the first and second engagement shafts). As a result, when the seat back is displaced from the lying position to the standing position, it is not necessary to push the hook member upwardly to cause the striker to enter, and the seat back can be easily displaced with a light force.

第２の発明では、シートバックが倒伏位置にある状態において、アシスト部材の規制部に形成された爪部と、フック部材の基部外縁に形成された係合部とが係合することにより、フック部材を所定の位置により確実に保持することができる。 In the second invention, in a state where the seat back is in the lying position, the hook portion is engaged with the engaging portion formed on the base portion outer edge of the hook member, and the hook portion is formed on the base member outer edge. The member can be securely held at a predetermined position.

第３の発明では、シートバックが倒伏位置にある状態において、ベースプレートにはアシスト部材に当接してアシスト部材のストライカ反進入方向への回動を規制するストッパーが設けられていることから、アシスト部材の反進入方向への抜けを確実に阻止することができ、フック部材とアシスト部材との当接状態をより確実に維持することができる。 In the third aspect of the invention, since the base plate is provided with a stopper that contacts the assist member and restricts the rotation of the assist member in the striker anti-entry direction when the seat back is in the lying position. Can be reliably prevented from coming off in the counter-entry direction, and the contact state between the hook member and the assist member can be more reliably maintained.

本発明を適用した車両用リヤシート１の斜視図である。1 is a perspective view of a vehicle rear seat 1 to which the present invention is applied. 本発明の実施形態１に係るロックアッセンブリＲの分解斜視図である。It is a disassembled perspective view of the lock assembly R which concerns on Embodiment 1 of this invention. 本発明の実施形態１において、シートバック３を倒伏位置から起立させるときの要部の動作を模式的に示す作動説明図である。In Embodiment 1 of this invention, it is operation | movement explanatory drawing which shows typically operation | movement of the principal part when raising the seat back 3 from a lying position. 本発明の実施形態１において、シートバック３が第１起立位置でロック状態にあるときの要部の動作を模式的に示す作動説明図である。In Embodiment 1 of this invention, it is action | operation explanatory drawing which shows typically operation | movement of the principal part when the seat back 3 is in a locked state in the 1st standing position. 本発明の実施形態１において、シートバック３が第２起立位置でロック解除状態にあるときの要部の動作を模式的に示す作動説明図である。In Embodiment 1 of this invention, it is operation | movement explanatory drawing which shows typically operation | movement of the principal part when the seat back 3 is in a lock release state in the 2nd standing position. 本発明の実施形態１において、シートバック３が第２起立位置でロック状態にあるときの要部の動作を模式的に示す作動説明図である。In Embodiment 1 of this invention, it is operation | movement explanatory drawing which shows typically operation | movement of the principal part when the seat back 3 is in a locked state in the 2nd standing position. 本発明の実施形態２に係る、シートバック３が倒伏位置にあるときの要部の正面図である。It is a front view of the principal part when the seat back 3 exists in a lying position based on Embodiment 2 of this invention.

以下、本発明の実施形態を図面に基づいて詳細に説明する。尚、以下の好ましい実施形態の説明は、本質的に例示に過ぎない。 Hereinafter, embodiments of the present invention will be described in detail with reference to the drawings. The following description of the preferred embodiment is merely exemplary in nature.

なお、以下の説明において、図１における左斜め下方を「車両前方」、右斜め上方を「車両後方」とし、左斜め上方を「車両右側方」、右斜め下方を「車両左側方」とする。図３における左側を「ストライカ進入方向」（以下、単に「進入方向」という）、右側を「ストライカ反進入方向」（以下、単に「反進入方向」という）とする。図２における左斜め上方を「進入方向」、右斜め下方を「反進入方向」とし、左斜め下方を「手前側」、右斜め上方を「裏側」とする。図１と図２ないし図６との関係においては、図１の「車両前方」が図２ないし図６の「進入方向」、図１の「車両後方」が図２ないし図６の「反進入方向」となり、図１の「車両左側方」が図２の「手前側」、図１の「車両右側方」が図２の「裏側」となる。また、「アンロック状態」とは、シートバック３が起立しておらずロックされていない状態をいい、「ロック解除状態」とは、シートバック３が起立位置にありロックが解除された状態をいう。「ロック状態」とは、シートバック３が起立位置にありロックされた状態をいう。 In the following description, the lower left diagonal in FIG. 1 is “vehicle front”, the upper right upper is “vehicle rear”, the upper left upper is “vehicle right side”, and the lower right lower is “vehicle left side”. . The left side in FIG. 3 is referred to as “a striker approach direction” (hereinafter, simply referred to as “entry direction”), and the right side is referred to as a “strike counter approach direction” (hereinafter, simply referred to as “counter approach direction”). In FIG. 2, the diagonally upper left is defined as “entry direction”, the diagonally lower right is defined as “anti-entry direction”, the diagonally lower left is defined as “front side”, and the diagonally upper right is defined as “back side”. 1 and FIGS. 2 to 6, “vehicle front” in FIG. 1 is “entry direction” in FIGS. 2 to 6, and “vehicle rear” in FIG. 1 is “anti-entry” in FIGS. 2 to 6. The “vehicle left side” in FIG. 1 is the “front side” in FIG. 2, and the “vehicle right side” in FIG. 1 is the “back side” in FIG. The “unlocked state” refers to a state where the seat back 3 is not raised and is not locked, and the “unlocked state” refers to a state where the seat back 3 is in the standing position and is unlocked. Say. The “locked state” means a state in which the seat back 3 is locked at the standing position.

（実施形態１）
図１は、本発明を適用した車両用リヤシート１を示す。該車両用リヤシート１は、車体フロアに据え付けられるシートクッション２と、シートクッション２後側に位置する車体に、左右方向を向くヒンジ軸（図示省略）により前後方向へ起倒可能に支持されるシートバック３とを備える。 (Embodiment 1)
FIG. 1 shows a vehicle rear seat 1 to which the present invention is applied. The vehicle rear seat 1 is a seat cushion 2 installed on a vehicle body floor, and a seat supported on a vehicle body located on the rear side of the seat cushion 2 so as to be able to tilt in the front-rear direction by a hinge shaft (not shown) facing in the left-right direction. A back 3.

図１に示すように、上記シートバック３は、車両左側方の側端面であって、肩部よりも下方位置に埋設配置されるロックアッセンブリＲと、車体パネル（図示省略）側に固着される金属製のストライカ１０とが係合することによって、図１に実線で示す第１起立位置と、第１起立位置よりも後傾した二点鎖線で示す第２起立位置とに保持可能であるとともに、シートバック３の肩部に設けられた操作手段１１の操作に基づいて、前方へ倒伏する一点鎖線で示す倒伏位置に前回りに移動することができる。 As shown in FIG. 1, the seat back 3 is a side end face on the left side of the vehicle, and is fixed to a lock assembly R that is embedded in a position below the shoulder, and a vehicle body panel (not shown) side. By being engaged with the metal striker 10, it can be held in the first standing position shown by a solid line in FIG. 1 and the second standing position shown by a two-dot chain line inclined backward from the first standing position. Based on the operation of the operating means 11 provided on the shoulder portion of the seat back 3, it is possible to move forward to a lying position indicated by a one-dot chain line that falls forward.

上記ストライカ１０は、シートバック３の側端面に対向する車体パネル（図示省略）側に固定され、車体側壁（図示省略）から車両右側方に突出した平面視略Ｕ字状からなり、車両前方に位置する第１係合軸１０１と、この第１係合軸１０１よりも傾倒側に位置する車両後方の第２係合軸１０２とを有している。 The striker 10 is fixed to a vehicle body panel (not shown) facing the side end surface of the seat back 3, and has a substantially U shape in plan view protruding from the vehicle body side wall (not shown) to the right side of the vehicle. The first engagement shaft 101 is positioned, and the second engagement shaft 102 is located on the tilt side of the first engagement shaft 101 at the rear of the vehicle.

操作手段１１は、シートバック３の肩部に配置され、上下方向に角筒状をなす枠部１１１と、枠部１１１内に上下方向へ摺動可能に収容される操作ノブ１１２とを備えている。後述するように、操作手段１１とロックアッセンブリＲとは、操作ロッド１１３によって連結されている（図３参照）。 The operation means 11 includes a frame portion 111 that is disposed on the shoulder portion of the seat back 3 and has a rectangular tube shape in the vertical direction, and an operation knob 112 that is accommodated in the frame portion 111 so as to be slidable in the vertical direction. Yes. As will be described later, the operating means 11 and the lock assembly R are connected by an operating rod 113 (see FIG. 3).

図２に示すように、ロックアッセンブリＲは、シートバック３にボルト等（図示省略）により固定される金属製で平板状のベースプレート４と、ベースプレート４の手前側に対向するように固定され、金属製で断面略コの字状のカバープレート５とを備えている。ベースプレート４及びカバープレート５の上下方向略中央部には、シートバック３を起立させた際に、ストライカ１０の第１係合軸１０１、第２係合軸１０２が車両後方から進入できるよう反進入方向が開口した進入溝４１、５２が切欠き状に形成されている。また、ベースプレート４とカバープレート５との間には、収容空間Ｓが形成されている。 As shown in FIG. 2, the lock assembly R is fixed to the seat back 3 with a metal plate that is fixed to the seat back 3 with bolts (not shown) and the front side of the base plate 4 so as to face the front side. And a cover plate 5 having a substantially U-shaped cross section. When the seat back 3 is erected, the first engagement shaft 101 and the second engagement shaft 102 of the striker 10 are allowed to enter from the rear side of the vehicle at substantially the center in the vertical direction of the base plate 4 and the cover plate 5. The entrance grooves 41 and 52 whose directions are opened are formed in a notch shape. An accommodation space S is formed between the base plate 4 and the cover plate 5.

ベースプレート４とカバープレート５との間の収容空間Ｓには、ストライカ１０の係合軸１０１，１０２と係合するフック部材６と、フック部材６を保持するとともにシートバック３の倒伏位置への移動をアシストするアシスト部材８と、シートバック３を起立させる際のストライカ１０の進入を補助する補助フック部材７と、操作手段１１（図３参照）の操作に基づく作動を補助フック部材７に伝える作動レバー９とが配置されている。 In the accommodation space S between the base plate 4 and the cover plate 5, the hook member 6 that engages with the engaging shafts 101 and 102 of the striker 10, the hook member 6 is held, and the seat back 3 moves to the lying position. An assist member 8 for assisting the vehicle, an auxiliary hook member 7 for assisting the entry of the striker 10 when raising the seat back 3, and an operation for transmitting the operation based on the operation of the operation means 11 (see FIG. 3) to the auxiliary hook member 7. A lever 9 is arranged.

上記ベースプレート４において、カバープレート５との対向面には、図２における進入溝４１の奥側に第１枢軸４２が設けられ、第１枢軸４２よりも上方位置に第２枢軸４３と、第１枢軸４２よりも下方位置に第３枢軸４４とが突設され、これらの枢軸４２〜４４は収容空間を奥側から手前側に向かって水平方向に延びている。また、ベースプレート４には、アシスト部材８の回動を規制する第１ストッパー４５が第３枢軸４４の図２右側に設けられ、フック部材６の回動を規制する第２ストッパー４６が第１ストッパー４５の図２右上方かつ進入溝４１の下方位置に設けられ、作動レバー９の回動を規制する第３ストッパー４７が第２枢軸４３の図２右上方に設けられている。 In the base plate 4, a first pivot 42 is provided on the surface facing the cover plate 5 on the back side of the entry groove 41 in FIG. 2, and the second pivot 43 and the first pivot 42 are positioned above the first pivot 42. A third pivot 44 protrudes below the pivot 42, and these pivots 42 to 44 extend in the horizontal direction from the back side toward the near side in the accommodation space. The base plate 4 is provided with a first stopper 45 for restricting the rotation of the assist member 8 on the right side of the third pivot 44 in FIG. 2, and a second stopper 46 for restricting the rotation of the hook member 6 is the first stopper. A third stopper 47 that is provided at the upper right of 45 in FIG. 2 and below the entry groove 41 and that restricts the rotation of the operating lever 9 is provided at the upper right of the second pivot 43 in FIG.

上記フック部材６は金属製の板状部材からなり、図２における左側下方に基部６１を有する。該基部６１は上記ベースプレート４の第１枢軸４２に回動可能に支持され、フック部材６は第１枢軸４２に巻装した第１ばね４８によって図２Ｙ方向（手前側から見て時計回り方向）へ回動付勢されている。また、図２におけるフック部材６の右側（反進入方向）には、ストライカ１０の第１係合軸１０１及び第２係合軸１０２が選択的に係合可能な切欠状の第１係合溝６２が開口を下方に向けて形成されている。第１係合溝６２よりも基部６１寄り側には、ストライカ１０の第１係合軸１０１が遊嵌可能な切欠状の第２係合溝６３が開口を下方に向けて形成されている。第１係合溝６２と第２係合溝６３との間には、後述するアシスト部材８の規制部８３と当接可能な突出部６４が下方に突出するように設けられている。フック部材６の第２係合溝６３上方には、裏側（ベースプレート側）へ突出し、後述する補助フック部材７の長孔７４内を移動可能な軸部６５が設けられている。 The hook member 6 is made of a metal plate-like member, and has a base 61 on the lower left side in FIG. The base 61 is rotatably supported on the first pivot 42 of the base plate 4, and the hook member 6 is moved in the Y direction of FIG. 2 (clockwise as viewed from the front side) by a first spring 48 wound around the first pivot 42. Is biased to rotate. Further, on the right side (counter-entry direction) of the hook member 6 in FIG. 2, a notch-shaped first engagement groove in which the first engagement shaft 101 and the second engagement shaft 102 of the striker 10 can be selectively engaged. 62 is formed with the opening facing downward. A notch-like second engagement groove 63 into which the first engagement shaft 101 of the striker 10 can be loosely fitted is formed on the side closer to the base 61 than the first engagement groove 62 with the opening facing downward. Between the first engagement groove 62 and the second engagement groove 63, a protrusion 64 that can come into contact with a restriction portion 83 of the assist member 8 described later is provided so as to protrude downward. Above the second engagement groove 63 of the hook member 6, there is provided a shaft portion 65 that protrudes to the back side (base plate side) and can move within a long hole 74 of the auxiliary hook member 7 described later.

補助フック部材７は金属製の板状部材からなり、フック部材６とベースプレート４との間に設けられている。補助フック部材７は、図２における左側下方に基部７１を有する。該基部７１は上記ベースプレート４の第１枢軸４２に回動可能に支持されている。補助フック部材７は、第１枢軸４２に巻装した第２ばね４９によって図２Ｙ方向（手前側から見て時計回り方向）へ回動付勢されている。補助フック部材７には、図２における基部７１の右側（反進入方向）に下方へ延びる延出部７２が形成されている。該延出部７２は、上記フック部材６の突出部６４と略同形状に突出して形成されている。また、該延出部７２の車両後方側外縁７２ｂは、上方に向かうにつれて第１枢軸４２を中心とする円弧面よりも反進入方向へ広がる（第１枢軸４２から離れる）よう形成されている。補助フック部材７の基部７１と延出部７２との間には、フック部材６の第２係合溝６３と略同形状をなす補助係合溝７３が開口を下方に向けて形成されている。補助フック部材７の補助係合溝７３上方には、フック部材６の軸部６５が相対的に移動可能な長孔７４が、第１枢軸４２を中心とする円弧に沿って延びるように形成されている。また、長孔７４上端の図２における左側には、裏側（ベースプレート側）へ突出し、後述する作動レバー９の作動部９２が当接可能な当接ピン７５が設けられている。 The auxiliary hook member 7 is made of a metal plate-like member and is provided between the hook member 6 and the base plate 4. The auxiliary hook member 7 has a base 71 on the lower left side in FIG. The base 71 is rotatably supported on the first pivot 42 of the base plate 4. The auxiliary hook member 7 is urged to rotate in the Y direction of FIG. 2 (clockwise as viewed from the front side) by a second spring 49 wound around the first pivot 42. The auxiliary hook member 7 is formed with an extending portion 72 that extends downward to the right side (counter approach direction) of the base portion 71 in FIG. The extending portion 72 is formed so as to protrude in substantially the same shape as the protruding portion 64 of the hook member 6. Further, the vehicle rear side outer edge 72b of the extending portion 72 is formed so as to extend in the counter approaching direction (away from the first pivot 42) than the arc surface centered on the first pivot 42 as it goes upward. Between the base portion 71 and the extension portion 72 of the auxiliary hook member 7, an auxiliary engagement groove 73 having substantially the same shape as the second engagement groove 63 of the hook member 6 is formed with the opening facing downward. . Above the auxiliary engagement groove 73 of the auxiliary hook member 7, a long hole 74 through which the shaft portion 65 of the hook member 6 can move is formed so as to extend along an arc centered on the first pivot 42. ing. Further, on the left side of the upper end of the long hole 74 in FIG. 2, there is provided a contact pin 75 that protrudes to the back side (base plate side) and can contact an operation portion 92 of an operation lever 9 described later.

アシスト部材８は金属製の板状部材からなり、図２における下方に基部８１を有する。該基部８１は上記ベースプレート４の第３枢軸４４に回動可能に支持されている。アシスト部材８は、第３枢軸４４に巻装した第３ばね５０によって図２Ｘ方向（手前側から見て時計回り方向）へ回動付勢されている。アシスト部材８は、上部にストライカ１０の第１係合軸１０１に当接可能な当接部８２と、フック部材６の突出部６４に当接可能な規制部８３とが、二股に分かれて延出するように形成されている。規制部８３の先端は、裏側に屈曲形成されていて、規制部８３先端がフック部材６の突出部６４と当接した際に、フック部材６をアンロック状態に安定して保持しやすいようになっている。なお、規制部８３の先端は、手前側に屈曲形成しても良く、場合によってはどちらにも屈曲させない形状としても良い。 The assist member 8 is made of a metal plate-like member, and has a base portion 81 below in FIG. The base 81 is rotatably supported on the third pivot 44 of the base plate 4. The assist member 8 is urged to rotate in the direction of FIG. 2X (clockwise as viewed from the front side) by a third spring 50 wound around the third pivot 44. The assist member 8 includes a contact portion 82 that can contact the first engagement shaft 101 of the striker 10 and a restriction portion 83 that can contact the protruding portion 64 of the hook member 6. It is formed to come out. The tip of the restricting portion 83 is bent at the back side so that when the tip of the restricting portion 83 comes into contact with the protruding portion 64 of the hook member 6, the hook member 6 can be stably held in the unlocked state. It has become. Note that the tip of the restricting portion 83 may be bent toward the front side, or may be shaped so as not to be bent in either case.

作動レバー９は、金属製の板状部材からなり、図２における左上方に基部９１を有する。該基部９１は、上記ベースプレート４に設けた第２枢軸４３に回動可能に支持され、第２枢軸４３に巻装した第４ばね５１によって図２Ｚ方向（手前側から見て反時計回り方向）へ付勢されている。作動レバー９は、基部９１の下方に、補助フック部材７の当接ピン７５に当接可能な作動部９２と、フック部材６の角部６６に当接可能な受止部９３とが二股に分かれて延出するように形成されている。受止部９３は、手前側（補助フック部材７側）に屈曲した後に下方に屈曲した段状をなすように折り曲げ形成され、補助フック部材７との干渉を避けてフック部材６の角部６６と当接できるようになっている。作動レバー９の上端部の連結孔９４には、後述する操作ロッド１１３を介して操作手段１１に連結される。また、作動レバー９は上部が上記ベースプレート４の第３ストッパー４７に当接することで、Ｚ方向へ回転し過ぎることを規制されている。 The actuating lever 9 is made of a metal plate-like member, and has a base 91 at the upper left in FIG. The base 91 is rotatably supported by a second pivot 43 provided on the base plate 4 and is moved in the direction of FIG. 2Z (counterclockwise as viewed from the front side) by a fourth spring 51 wound around the second pivot 43. Is being energized. The actuating lever 9 has an actuating portion 92 that can be brought into contact with the abutting pin 75 of the auxiliary hook member 7 and a receiving portion 93 that can be brought into contact with the corner portion 66 of the hook member 6 below the base 91. It is formed to divide and extend. The receiving portion 93 is formed to be bent in a stepped shape that is bent to the front side (auxiliary hook member 7 side) and then bent downward, and avoids interference with the auxiliary hook member 7 to prevent the corner portion 66 of the hook member 6. It can come into contact with. The connection hole 94 at the upper end of the operating lever 9 is connected to the operation means 11 via an operation rod 113 described later. Further, the operation lever 9 is restricted from rotating too much in the Z direction by the upper portion being in contact with the third stopper 47 of the base plate 4.

次に、実施形態１における要部の作動状態を、図３ないし図６に基づいて説明する。なお、説明の便宜上カバープレート５は外した状態で説明するものとする。 Next, the operation state of the main part in the first embodiment will be described with reference to FIGS. For convenience of explanation, it is assumed that the cover plate 5 is removed.

まず、シートバック３を倒伏位置から起立させるときの作動状態を図３に基づいて説明する。 First, an operation state when the seat back 3 is raised from the lying position will be described with reference to FIG.

図３に示すように、シートバック３が倒伏位置にあるとき、アシスト部材８は第３枢軸４４に巻装された第３ばね５０によってＸ方向へ付勢されているが、ベースプレート４に設けられた第１ストッパー４５に当接することで上記Ｘ方向への回動が規制されるため、所定位置に維持されている。このように第１ストッパー４５により、アシスト部材８のストライカ反進入方向への回動を規制することで、アシスト部材８の反進入方向への抜けを確実に阻止して、その規制部８３とフック部材６の突出部６３との当接状態をより確実に維持することができる。 As shown in FIG. 3, when the seat back 3 is in the lying position, the assist member 8 is biased in the X direction by the third spring 50 wound around the third pivot 44, but is provided on the base plate 4. Since the rotation in the X direction is restricted by contacting the first stopper 45, the first stopper 45 is maintained at a predetermined position. Thus, by restricting the rotation of the assist member 8 in the striker counter-ingress direction by the first stopper 45, the assist member 8 is reliably prevented from coming off in the counter-entry direction, and the restricting portion 83 and the hook The contact state of the member 6 with the protruding portion 63 can be more reliably maintained.

フック部材６は、第１枢軸４２に巻装された第１ばね４８によってＹ方向へ付勢されているが、第１係合溝６２と第２係合溝６３との間に形成された突出部６４が、上記所定位置に維持されたアシスト部材８の規制部８３と当接することで上記Ｙ方向への回動が規制されるため、車両後方側下端６ａがストライカ１０の移動軌跡Ｌ（第１係合軸１０１、第２係合軸１０２の軸中心が描く軌跡）よりも上方に保持されている。 The hook member 6 is urged in the Y direction by a first spring 48 wound around the first pivot 42, but is a protrusion formed between the first engagement groove 62 and the second engagement groove 63. Since the rotation in the Y direction is restricted by the portion 64 coming into contact with the restricting portion 83 of the assist member 8 maintained at the predetermined position, the vehicle rear side lower end 6a is moved along the movement locus L (first position of the striker 10). (The locus drawn by the axis centers of the first engagement shaft 101 and the second engagement shaft 102).

補助フック部材７は、第１枢軸４２に巻装された第２ばね４９によってＹ方向へ付勢されているが、長孔７４の上端がフック部材６の軸部６５に当接することで所定位置に維持されている。このとき、補助フック部材７の延出部先端７２ａは、ベースプレート４に形成された進入溝４１の下縁４１ａよりも下方に位置するようになっている。 The auxiliary hook member 7 is urged in the Y direction by the second spring 49 wound around the first pivot shaft 42, but the upper end of the long hole 74 abuts on the shaft portion 65 of the hook member 6 to be in a predetermined position. Is maintained. At this time, the extended portion distal end 72 a of the auxiliary hook member 7 is positioned below the lower edge 41 a of the entry groove 41 formed in the base plate 4.

作動レバー９は、受止部９３がフック部材６の角部６６と当接しているため、反Ｚ方向に回動した状態となっている。作動レバー９の回動は操作ロッド１１３を介して操作ノブ１１２に伝達されているため、操作ノブ１１２は下方に摺動した状態となっている。すなわち、シートバック３が倒伏位置にあるときは、操作ノブ１１２が操作手段１１の枠部１１１内で枠部上面１１１ｂから下方へ摺動し、枠部内面１１１ａが一部露出した状態となる（図３参照）。それにより、乗員はアンロック状態であることを認識することができる。 The actuating lever 9 is rotated in the anti-Z direction because the receiving portion 93 is in contact with the corner portion 66 of the hook member 6. Since the rotation of the actuating lever 9 is transmitted to the operation knob 112 via the operation rod 113, the operation knob 112 is slid downward. That is, when the seat back 3 is in the lying position, the operation knob 112 slides downward from the frame portion upper surface 111b within the frame portion 111 of the operation means 11, and the frame portion inner surface 111a is partially exposed ( (See FIG. 3). Thereby, the occupant can recognize that the vehicle is unlocked.

シートバック３を倒伏位置から後回りに回動させて起立させると、図３に示すように、ストライカ１０はベースプレート４の進入溝４１に相対的に進入し、第１係合軸１０１がアシスト部材８の当接部８２に当接する。アシスト部材８は第３枢軸４４に第３ばね５０により回動付勢された状態で回動可能に支持されているため、ストライカ１０の当接による衝撃力を緩和することができ、緩衝音を低減させることができる。そのまま、当接部８２と第１係合軸１０１とが当接した状態でストライカ１０をさらに進入方向（車両前方）へ進入させると、アシスト部材８が第３ばね５０による付勢に抗して反Ｘ方向に回動し、アシスト部材８の規制部８３とフック部材６の突出部６４との当接状態が解除される。それとともに、ストライカ１０の第１係合軸１０１がフック部材６の車両後方側下端６ａに当接してフック部材６をわずかに持ち上げ、ストライカ１０の第１係合軸１０１がフック部材６の第１係合溝６２に進入する。そして、図３に二点鎖線で示すように、ストライカ１０の第１係合軸１０１は補助フック部材７の延出部７２に当接して、進入方向への進入が止まる。そのため、ストライカ１０を勢いよく進入させた場合でも、第１係合軸１０１がフック部材６の突出部６４を超えて第２係合溝６３内まで進入することを阻止できる。フック部材６の軸部６５は補助フック部材７の長孔７４内をＹ方向に移動可能な状態となっているため、ストライカ１０の第１係合軸１０１が係合溝６２に進入するとともに、フック部材６は第１ばね４８の付勢力によりＹ方向へ回動する。 When the seat back 3 is rotated backward from the lying position and stood up, as shown in FIG. 3, the striker 10 enters relatively into the entry groove 41 of the base plate 4, and the first engagement shaft 101 is the assist member. 8 abuts on the abutment portion 82. Since the assist member 8 is rotatably supported by the third pivot 44 while being urged by the third spring 50, the impact force due to the contact of the striker 10 can be mitigated, and the buffering sound can be reduced. Can be reduced. If the striker 10 is further advanced in the approach direction (front of the vehicle) while the contact portion 82 and the first engagement shaft 101 are in contact with each other, the assist member 8 resists biasing by the third spring 50. By rotating in the anti-X direction, the contact state between the restricting portion 83 of the assist member 8 and the protruding portion 64 of the hook member 6 is released. At the same time, the first engagement shaft 101 of the striker 10 abuts against the vehicle rear side lower end 6 a of the hook member 6 to slightly lift the hook member 6, and the first engagement shaft 101 of the striker 10 is the first of the hook member 6. Enter the engaging groove 62. Then, as indicated by a two-dot chain line in FIG. 3, the first engagement shaft 101 of the striker 10 abuts on the extending portion 72 of the auxiliary hook member 7 and stops entering in the entering direction. Therefore, even when the striker 10 is vigorously entered, the first engagement shaft 101 can be prevented from entering the second engagement groove 63 beyond the protrusion 64 of the hook member 6. Since the shaft portion 65 of the hook member 6 is movable in the Y direction in the elongated hole 74 of the auxiliary hook member 7, the first engagement shaft 101 of the striker 10 enters the engagement groove 62, and The hook member 6 is rotated in the Y direction by the biasing force of the first spring 48.

このとき、アシスト部材８の規制部８３は、シートバック３が倒伏位置にある状態でフック部材６の突出部６４と当接して、フック部材６のストライカ反進入方向側の下端６ａをストライカ１０の移動軌跡Ｌよりも上方に保持するよう形成されていることにより、シートバック３を倒伏位置から起立位置に変位させる際に、フック部材６を上方に大きく
押し上げてストライカ１０を進入させる必要がなく、軽い力で容易に変位させることができる。 At this time, the restricting portion 83 of the assist member 8 is in contact with the protruding portion 64 of the hook member 6 in a state where the seat back 3 is in the lying position, and the lower end 6a of the hook member 6 on the striker anti-entry direction side is By being formed so as to be held above the movement locus L, when the seat back 3 is displaced from the lying down position to the standing position, it is not necessary to push the hook member 6 upward largely to allow the striker 10 to enter. It can be easily displaced with a light force.

次に、シートバック３が、第１起立位置でロック状態になるときの作動状態を図４に基づいて説明する。 Next, the operation state when the seat back 3 is locked at the first standing position will be described with reference to FIG.

図４に示すように、フック部材６がＹ方向に回動することによりストライカ１０の第１係合軸１０１とフック部材６の第１係合溝６２とが係合し、シートバック３は第１起立位置に確実かつ安定して保持される。フック部材６は車両後方側下端６ａがベースプレート４に設けられた第２ストッパー４６に当接することにより、Ｙ方向への回動が規制される。補助フック部材７は、Ｙ方向へ付勢されるとともに、延出部７２の車両後方側外縁７２ｂが上方に向かうにつれて第１枢軸４２を中心とする円弧面よりも車両後方側（反進入方向）に広がるよう形成されている。そのため、ストライカ１０の第１係合軸１０１は補助フック部材７の延出部７２によって反進入方向（車両後方）へ押圧される。また、Ｘ方向へ付勢されたアシスト部材８の当接部８２によっても反進入方向（車両後方）へ押圧される。そのため、ストライカ１０の第１係合軸１０１は、延出部７２の押圧面７２ｃ及び当接部８２の押圧面８２ａと、第１係合溝反進入方向（車両後方）面６２ａとで挟持されることとなり、ガタつきが防止される。それによって、シートバック３は第１起立位置へ確実かつ安定して保持される。 As shown in FIG. 4, when the hook member 6 rotates in the Y direction, the first engagement shaft 101 of the striker 10 and the first engagement groove 62 of the hook member 6 are engaged, and the seat back 3 is It is securely and stably held in one standing position. The hook member 6 is restricted from rotating in the Y direction when the vehicle rear side lower end 6 a abuts against a second stopper 46 provided on the base plate 4. The auxiliary hook member 7 is urged in the Y direction, and as the vehicle rear side outer edge 72b of the extending portion 72 moves upward, the vehicle rear side (anti-entry direction) with respect to the arc surface centered on the first pivot 42. It is formed to spread. Therefore, the first engagement shaft 101 of the striker 10 is pressed in the counter approaching direction (rear of the vehicle) by the extending portion 72 of the auxiliary hook member 7. Further, it is also pressed in the anti-entry direction (rear of the vehicle) by the contact portion 82 of the assist member 8 biased in the X direction. Therefore, the first engagement shaft 101 of the striker 10 is sandwiched between the pressing surface 72c of the extending portion 72 and the pressing surface 82a of the abutting portion 82, and the first engagement groove opposite entry direction (vehicle rear) surface 62a. As a result, rattling is prevented. Thereby, the seat back 3 is securely and stably held at the first standing position.

また、フック部材６のＹ方向への回動に伴って、作動レバー９は付勢されているＺ方向へ回動する。それとともに作動レバー９の回動に伴う作動が、操作ロッド１１３を介して操作ノブ１１２に伝達される。それにより、操作ノブ１１２は上方に押上げられ、操作ノブ上面１１２ａが枠部上面１１１ｂと平坦になる。すなわち、シートバック３が第１起立位置でロック状態にあるとき、操作手段１１の枠部内面１１１ａは外から視認できない状態となる。それにより乗員はロック状態であることを認識できる。 Further, as the hook member 6 rotates in the Y direction, the operating lever 9 rotates in the biased Z direction. At the same time, the operation accompanying the rotation of the operating lever 9 is transmitted to the operating knob 112 via the operating rod 113. Thereby, the operation knob 112 is pushed upward, and the operation knob upper surface 112a becomes flat with the frame upper surface 111b. That is, when the seat back 3 is in the locked state at the first standing position, the frame portion inner surface 111a of the operation means 11 is not visible from the outside. As a result, the occupant can recognize that the vehicle is locked.

次に、第１起立位置から第２起立位置へ変位させるときの作動状態について、図５に基づいて説明する。 Next, the operation state when displacing from the first standing position to the second standing position will be described with reference to FIG.

この作動状態にするためには、操作手段１１を操作して、フック部材６及び補助フック部材７をロック解除状態にする。その操作手段１１の操作について、以下説明する。図５は、シートバック３が第２起立位置でロック解除状態にあるときの作動状態を示す。この図５に示すように、操作手段１１の枠部１１１内に上下摺動可能に設けられた操作ノブ１１２を下方へ押込むことにより、詳細は省略するが、その作動が操作ロッド１１３を介して作動レバー９に伝達されて作動レバー９が押される。そうすると、作動レバー９が第２枢軸４３を中心に反Ｚ方向へ回動することになり、作動レバー９の作動部９２が補助フック部材７の当接ピン７５に当接し、補助フック部材７が第１枢軸４２を中心に反Ｙ方向へ回動することとなる。それに伴って、補助フック部材７の長孔７４も反Ｙ方向へ回動することとなり、長孔７４の下端がフック部材６の軸部に当接する。この状態となっても補助フック部材７はさらに反Ｙ方向へ回動するため、フック部材６は補助フック部材７の回動に伴って追従して回動する。フック部材６は補助フック部材７の回動に伴って回動することにより上方に持上げられ、第１係合溝６２は、ストライカ１０の第１係合軸１０１と離間し、図５に二点鎖線で示すロック解除状態となる。 In order to enter this operating state, the operating means 11 is operated to bring the hook member 6 and the auxiliary hook member 7 into the unlocked state. The operation of the operation means 11 will be described below. FIG. 5 shows an operating state when the seat back 3 is in the unlocked state at the second standing position. As shown in FIG. 5, the operation knob 112 provided in the frame portion 111 of the operation means 11 so as to be slidable up and down is pushed downward, but the details are omitted, but the operation is performed via the operation rod 113. Is transmitted to the operating lever 9 and the operating lever 9 is pushed. Then, the operating lever 9 rotates in the anti-Z direction around the second pivot 43, the operating portion 92 of the operating lever 9 contacts the contact pin 75 of the auxiliary hook member 7, and the auxiliary hook member 7 It will rotate in the anti-Y direction around the first pivot 42. Accordingly, the long hole 74 of the auxiliary hook member 7 also rotates in the anti-Y direction, and the lower end of the long hole 74 comes into contact with the shaft portion of the hook member 6. Even in this state, the auxiliary hook member 7 further rotates in the anti-Y direction, so that the hook member 6 follows and rotates as the auxiliary hook member 7 rotates. The hook member 6 is lifted upward by rotating with the rotation of the auxiliary hook member 7, and the first engagement groove 62 is separated from the first engagement shaft 101 of the striker 10, and two points are shown in FIG. The unlocked state indicated by the chain line is entered.

かかるロック解除状態においてシートバック３を第１起立位置から第２起立位置に移動させると、図５に二点鎖線で示す状態から、ストライカ１０は第１係合軸１０１がアシスト部材８の当接部８２と当接したままさらに進入方向（車両前方）へ進入し、図５に実線で示すロック解除状態となる。このときストライカ１０は、Ｘ方向へ付勢されたアシスト部材８により反進入方向へ押されながら、進入溝４１の進入方向端部４１ｂまで移動するので、ストライカ１０の第１係合軸１０１と進入溝４１の進入方向端部４１ｂとの当接による緩衝音が効果的に緩和される。なお、緩衝音をより低減させるよう、進入溝４１の進入方向端部４１ｂにゴム等の緩衝材を設けても良い。 When the seat back 3 is moved from the first standing position to the second standing position in the unlocked state, the striker 10 contacts the first engagement shaft 101 with the assist member 8 from the state shown by the two-dot chain line in FIG. The vehicle further enters the approach direction (front of the vehicle) while being in contact with the portion 82, and enters the unlocked state indicated by the solid line in FIG. At this time, the striker 10 moves to the entry direction end 41b of the entry groove 41 while being pushed in the counter entry direction by the assist member 8 biased in the X direction, so that the striker 10 enters the first engagement shaft 101 of the striker 10. The buffer sound due to contact with the end 41b of the groove 41 in the approach direction is effectively reduced. In addition, you may provide buffer materials, such as rubber | gum, in the approach direction edge part 41b of the approach groove | channel 41 so that a buffer noise may be reduced more.

そして、図５に実線で示す状態で操作ノブ１１２の操作を止めると、それぞれのばねの付勢力によって、作動レバー９はＺ方向へ、補助フック部材７及びフック部材６はＹ方向へそれぞれ回動し、ストライカ１０の第２係合軸１０２とフック部材６の第１係合溝６２が係合し、シートバック３が第２起立位置にあるロック状態となる（図６参照）。 When the operation of the operation knob 112 is stopped in the state shown by the solid line in FIG. 5, the operating lever 9 is rotated in the Z direction, and the auxiliary hook member 7 and the hook member 6 are rotated in the Y direction by the biasing force of each spring. Then, the second engagement shaft 102 of the striker 10 and the first engagement groove 62 of the hook member 6 are engaged with each other, and the seat back 3 is in the locked state in the second standing position (see FIG. 6).

次に、シートバック３が第２起立位置でロック状態になるときの作動状態を図６に基づいて説明する。 Next, the operation state when the seat back 3 is locked at the second standing position will be described with reference to FIG.

図６に示すように、フック部材６がＹ方向に回動することによりストライカ１０の第２係合軸１０２とフック部材６の第１係合溝６２とが係合し、シートバック３は第２起立位置に確実かつ安定して保持される。フック部材６は車両後方側下端６ａがベースプレート４に設けられた第２ストッパー４６に当接することにより、Ｙ方向への回動が規制される。ストライカ１０の第１係合軸１０１は、第２係合溝６３及び補助係合溝７３に遊嵌している。それによって、ストライカ１０の第２係合軸１０２は、ストライカ１０の第１係合軸１０１と第２係合軸１０２の寸法のばらつきやロックアッセンブリＲの取付位置の誤差等の影響を受けることなく、フック部材６の第１係合溝６２へ確実に所定状態にて係合する。ストライカ１０の第１係合軸１０１は、Ｘ方向へ付勢されたアシスト部材８の当接部押圧面８２ａによって、反進入方向へ押圧される。また、ストライカ１０の第２係合軸１０２は、Ｙ方向へ付勢されるとともに、車両後方外縁７２ｂが上方へ向かうにつれて車両後方側にやや広がるよう形成された補助フック部材７の延出部７２によって、反進入方向へ押圧される。そのため、第２係合軸１０２は補助フック部材７の延出部７２の押圧面７２ｃと、フック部材６の第１係合溝反進入方向（車両後方）面６２ａとで挟持され、ガタつきが防止される。それによって、シートバック３は第２起立位置に確実かつ安定して保持される。 As shown in FIG. 6, when the hook member 6 is rotated in the Y direction, the second engagement shaft 102 of the striker 10 and the first engagement groove 62 of the hook member 6 are engaged, and the seat back 3 is 2 Reliably and stably held in the standing position. The hook member 6 is restricted from rotating in the Y direction when the vehicle rear side lower end 6 a abuts against a second stopper 46 provided on the base plate 4. The first engagement shaft 101 of the striker 10 is loosely fitted in the second engagement groove 63 and the auxiliary engagement groove 73. As a result, the second engagement shaft 102 of the striker 10 is not affected by variations in the dimensions of the first engagement shaft 101 and the second engagement shaft 102 of the striker 10 or errors in the mounting position of the lock assembly R. The hook member 6 is reliably engaged with the first engagement groove 62 in a predetermined state. The first engagement shaft 101 of the striker 10 is pressed in the anti-entry direction by the contact portion pressing surface 82a of the assist member 8 biased in the X direction. Further, the second engagement shaft 102 of the striker 10 is urged in the Y direction, and the extension portion 72 of the auxiliary hook member 7 formed so as to spread slightly toward the vehicle rear side as the vehicle rear outer edge 72b goes upward. Is pushed in the opposite direction. Therefore, the second engagement shaft 102 is sandwiched between the pressing surface 72c of the extending portion 72 of the auxiliary hook member 7 and the first engagement groove counter-ingress direction (vehicle rearward) surface 62a of the hook member 6, and rattling occurs. Is prevented. Thereby, the seat back 3 is reliably and stably held at the second standing position.

また、上述の第１起立位置でロック状態にあるときと同様、操作ノブ１１２は、フック部材６及び作動レバー９の回動に伴って上方に押上げられ、操作ノブ上面１１２ａは枠部上面１１１ｂと平坦になる。すなわち、シートバック３が第２起立位置でロック状態にあるときにも、第１起立位置でロック状態にあるときと同様に、操作手段１１の枠部内面１１１ａは外から視認できない状態となり、乗員はロック状態であることを認識できる。 Further, as in the case of the locked state at the first standing position described above, the operation knob 112 is pushed upward along with the rotation of the hook member 6 and the operation lever 9, and the operation knob upper surface 112a is the frame upper surface 111b. And flattened. That is, when the seat back 3 is in the locked state at the second standing position, the frame portion inner surface 111a of the operating means 11 is not visible from the outside as in the locked state at the first standing position. Can recognize that it is locked.

次に、シートバック３を第２起立位置から倒伏位置または第１起立位置に変位させる場合の作動状態について説明する。この位置に変位させる場合には、操作手段１１の操作を要する。この操作は、図５における上述の説明と同様な操作となる。すなわち、第２起立位置から倒伏位置あるいは第１起立位置に変位させる場合においても、図５に示すように操作ノブ１１２を押し下げる操作が行われる。 Next, an operation state when the seatback 3 is displaced from the second standing position to the lying position or the first standing position will be described. When displacing to this position, operation of the operation means 11 is required. This operation is the same operation as described above in FIG. That is, even when displacing from the second standing position to the lying position or the first standing position, the operation knob 112 is pushed down as shown in FIG.

この操作手段１１の操作により、図５に示すようにフック部材６がロック解除状態に作動する。アシスト部材８は第３ばね５０によりＸ方向に回動付勢されているため、このアシスト部材８からストライカ１０に対して反進入方向への力が作用している。すなわち、第２起立位置から第１起立位置あるいは倒伏位置に変位させる方向へバネ力が作用している。そこで、上記フック部材６がロック解除状態に作動するのに伴い、上記バネ力の作用のアシストによって、上記とは逆の動きが行われるようにシートバック３を軽い力で第２起立位置から倒伏位置あるいは第１起立位置に変位させることができる。また、第１起立位置から倒伏位置に変位させる場合も同様にして容易に変位させることができるものであり、詳細な説明は省略する。 By the operation of the operation means 11, the hook member 6 is operated in the unlocked state as shown in FIG. Since the assist member 8 is urged to rotate in the X direction by the third spring 50, a force in the anti-entry direction acts on the striker 10 from the assist member 8. That is, the spring force is applied in the direction of displacement from the second standing position to the first standing position or the lying position. Therefore, as the hook member 6 operates in the unlocked state, the seat back 3 is lowered from the second standing position with a light force so that the reverse movement is performed by the assist of the action of the spring force. The position or the first standing position can be displaced. Moreover, when it is displaced from the first standing position to the lying position, it can be easily displaced in the same manner, and detailed description is omitted.

（実施形態２）
図７は、本発明の実施形態２を示す。図７に示すように、フック部材６０１の基部６１１外縁には、基部６１１外縁と略直交する方向（基部６１１の半径方向外側）に延びる係合面６１２ａを有する係合片６１２が外側へ向かって突出するように形成されている。また、アシスト部材８０１には、当接部８２１に対して約１２０°位の角度間隔をあけて進入方向へ向かって延出する規制部８３１が設けられている。この規制部８３１の先端には、規制部８３１の延出方向と略直交する方向に延びる係合面８３４ａを有しかつ該係合面８３４ａで上記係合片６１２の係合面６１２ａと係合可能な鈎状の爪部８３４が形成されている。その他の構成は、上記実施形態１と同様である。 (Embodiment 2)
FIG. 7 shows Embodiment 2 of the present invention. As shown in FIG. 7, an engagement piece 612 having an engagement surface 612 a extending in a direction substantially orthogonal to the outer edge of the base 611 (radially outward of the base 611) is formed on the outer edge of the base 611 of the hook member 601. It is formed to protrude. Further, the assist member 801 is provided with a restricting portion 831 that extends in the approach direction with an angular interval of about 120 ° with respect to the abutting portion 821. At the tip of the restricting portion 831, there is an engaging surface 834 a extending in a direction substantially orthogonal to the extending direction of the restricting portion 831, and the engaging surface 834 a is engaged with the engaging surface 612 a of the engaging piece 612. A possible hook-shaped claw portion 834 is formed. Other configurations are the same as those of the first embodiment.

本実施形態２では、シートバック３のアンロック状態において、フック部材６０１の係合片６１２とアシスト部材８０１の爪部８３４とが係合し、係合片６１２の係合面６１２ａと爪部８３４の係合面８３４ａとが当接する。それにより、フック部材６０１は、車両後方側下端６０１ａがストライカ１０の移動軌跡Ｌよりも上方に保持される。フック部材６０１とアシスト部材８０１は、それぞればねによって係合片６１２と爪部８３４との係合方向へ付勢されているためしっかりと係合させることができ、フック部材６０１を所定位置へ確実かつ安定して保持することができる。 In the second embodiment, in the unlocked state of the seat back 3, the engagement piece 612 of the hook member 601 and the claw portion 834 of the assist member 801 are engaged, and the engagement surface 612a of the engagement piece 612 and the claw portion 834 are engaged. Of the contact surface 834a. Thereby, the lower end 601a on the vehicle rear side of the hook member 601 is held above the movement locus L of the striker 10. The hook member 601 and the assist member 801 can be firmly engaged with each other because the hook member 601 and the assist member 801 are biased by the springs in the engaging direction of the engaging piece 612 and the claw portion 834, respectively. It can be held stably.

なお、実施形態１および２では、操作ノブを押込むことによりロック機構を作動させたが、かかる構成に限られるものでなく、引上げたり、スライドさせたりする構成でも良い。また、操作ロッドは、リンク機構にしても良い。また、補助フック部材はフック部材よりベースプレート側に支持する構成としたが、この構成に限られるものではなく、フック部材を補助フック部材よりもベースプレート側に支持する構成としても良い。また、図３においては、フック部材６の車両後方側下端６ａがストライカ１０の移動軌跡Ｌよりも上方に保持されるが、かかる構成においてフック部材の車両後方側下端は、ストライカが進入方向へ移動したときに全く当接しないようにしても良いし、一部が当接してフック部材を上方へ回動させるようにしても良い。 In the first and second embodiments, the lock mechanism is operated by pushing the operation knob. However, the present invention is not limited to such a configuration, and a configuration in which the lock mechanism is pulled up or slid may be used. Further, the operating rod may be a link mechanism. The auxiliary hook member is supported on the base plate side from the hook member. However, the present invention is not limited to this configuration, and the hook member may be supported on the base plate side relative to the auxiliary hook member. In FIG. 3, the vehicle rear side lower end 6 a of the hook member 6 is held above the movement locus L of the striker 10. In this configuration, the striker moves in the approach direction at the vehicle rear side lower end of the hook member. In this case, no contact may be made, or a part of the contact may be made to turn the hook member upward.

また、実施形態１および２は、シートバックの車両左側方にロックアッセンブリが設けられた場合であるが、本発明はこれに限られるものではなく、シートバックの車両右側方にロックアッセンブリが設けられた場合にも適用することができる。 Further, Embodiments 1 and 2 are cases where a lock assembly is provided on the left side of the vehicle in the seat back, but the present invention is not limited to this, and a lock assembly is provided on the right side of the vehicle in the seat back. This can also be applied.

本発明は、車両用のシートロック装置に好適である。 The present invention is suitable for a vehicle seat lock device.

１リヤシート
２シートクッション
３シートバック
Ｒロックアッセンブリ
４ベースプレート
４１進入溝
４２第１枢軸
４３第２枢軸
４４第３枢軸
４５第１ストッパー（ストッパー）
６，６０１フック部材
６１，６１１基部
６ａ，６０１ａ車両後方側下端（ストライカ反進入方向側の下端）
６１２係合片
６２第１係合溝
６３第２係合溝
６４突出部
６５軸部
７補助フック部材
７２延出部
７４長孔
７５当接ピン
８，８０１アシスト部材
８１基部
８２，８２１当接部
８３，８３１規制部
８３４爪部
９作動レバー
９２作動部
９３受止部
１０ストライカ
Ｌストライカの移動軌跡
１０１第１係合軸
１０２第２係合軸
１１操作手段
１１１枠部
１１２操作ノブ DESCRIPTION OF SYMBOLS 1 Rear seat 2 Seat cushion 3 Seat back R Lock assembly 4 Base plate 41 Entrance groove 42 First pivot 43 Second pivot 44 Third pivot 45 First stopper (stopper)
6,601 Hook member 61,611 Base 6a, 601a Lower end on the vehicle rear side (lower end on the striker non-entry direction side)
612 Engagement piece 62 1st engagement groove 63 2nd engagement groove 64 Projection part 65 Shaft part 7 Auxiliary hook member 72 Extension part 74 Long hole 75 Contact pin 8,801 Assist member 81 Base part 82,821 Contact part 83,831 Restriction part 834 Claw part 9 Actuation lever 92 Actuation part 93 Receiving part 10 Striker L Strike movement locus 101 First engagement shaft 102 Second engagement shaft 11 Operation means 111 Frame part 112 Operation knob

Claims

A vehicle seat lock device capable of holding a seat back supported by a vehicle body so as to be able to rise and fall in a first standing position and a second standing position inclined to the first standing position,
A striker that is fixed to the vehicle body, and includes a first engagement shaft and a second engagement shaft that is positioned on a tilt side of the first engagement shaft along the direction in which the seat back is tilted;
A lock assembly that is attached to the seat back side and that the striker enters and engages;
The lock assembly includes a base plate fixed to the seat back;
A hook member whose base is rotatably supported by the base plate with a horizontal axis;
The base portion includes an assist member that is rotatably supported by the base plate with a horizontal axis.
The hook member engages with the first engagement shaft of the striker when the seat back is held in the first standing position, while the second engagement shaft is held when the seat back is held in the second standing position. A first engagement groove that engages with the first engagement groove, and the first engagement shaft is loosely fitted when the seatback is held in the second upright position with respect to the first engagement groove. And a second engaging groove that is juxtaposed along the approach direction of the striker,
The assist member includes an abutting portion capable of abutting on the first engagement shaft of the striker, and abutting against the hook member when the striker has not entered the lock assembly. A restricting portion that restricts rotation in the direction is formed,
The assist member is urged so that the contact portion is directed in the counter-entry direction of the striker,
When the striker is not in the lock assembly, the restricting portion of the assist member comes into contact with a protruding portion located between the first engagement groove and the second engagement groove of the hook member. The hook member is configured to hold the lower end of the striker in the direction opposite to the striker direction above the movement locus drawn by the centers of the first and second engagement shafts of the striker. Seat lock device.

A vehicle seat lock device capable of holding a seat back supported by a vehicle body so as to be able to rise and fall in a first standing position and a second standing position inclined to the first standing position,
A striker that is fixed to the vehicle body, and includes a first engagement shaft and a second engagement shaft that is positioned on a tilt side of the first engagement shaft along the direction in which the seat back is tilted;
A lock assembly that is attached to the seat back side and that the striker enters and engages;
The lock assembly includes a base plate fixed to the seat back;
A hook member whose base is rotatably supported by the base plate with a horizontal axis;
The base portion includes an assist member that is rotatably supported by the base plate with a horizontal axis.
The hook member engages with the first engagement shaft of the striker when the seat back is held in the first standing position, while the second engagement shaft is held when the seat back is held in the second standing position. A first engagement groove that engages with the first engagement groove, and the first engagement shaft is loosely fitted when the seatback is held in the second upright position with respect to the first engagement groove. And a second engaging groove that is juxtaposed along the approach direction of the striker,
The assist member includes an abutting portion capable of abutting on the first engagement shaft of the striker, and abutting against the hook member when the striker has not entered the lock assembly. A restricting portion that restricts rotation in the direction is formed,
The assist member is urged so that the contact portion is directed in the counter-entry direction of the striker,
On the base outer edge of the hook member, an engaging piece protruding outward is formed,
The restricting portion of the assist member is formed with a claw portion that can be engaged with the engaging piece,
By engaging the engaging piece of the hook member with the claw portion of the assist member, the lower end of the hook member on the side opposite to the striker is held above the movement locus of the striker. Vehicle seat lock device.

A vehicle seat lock device capable of holding a seat back supported by a vehicle body so as to be able to rise and fall in a first standing position and a second standing position inclined to the first standing position,
A striker that is fixed to the vehicle body, and includes a first engagement shaft and a second engagement shaft that is positioned on a tilt side of the first engagement shaft along the direction in which the seat back is tilted;
A lock assembly that is attached to the seat back side and that the striker enters and engages;
The lock assembly includes a base plate fixed to the seat back;
A hook member whose base is rotatably supported by the base plate with a horizontal axis;
The base portion includes an assist member that is rotatably supported by the base plate with a horizontal axis.
The hook member engages with the first engagement shaft of the striker when the seat back is held in the first standing position, while the second engagement shaft is held when the seat back is held in the second standing position. A first engagement groove that engages with the first engagement groove, and the first engagement shaft is loosely fitted when the seatback is held in the second upright position with respect to the first engagement groove. And a second engaging groove that is juxtaposed along the approach direction of the striker,
The assist member includes an abutting portion capable of abutting on the first engagement shaft of the striker, and abutting against the hook member when the striker has not entered the lock assembly. A restricting portion that restricts rotation in the direction is formed,
The assist member is urged so that the contact portion is directed in the counter-entry direction of the striker,
The vehicle seat lock device according to claim 1, wherein the base plate is provided with a stopper that contacts the assist member and restricts the rotation of the assist member in the striker anti-entry direction.