JP2010162987A - Seat structure of vehicle - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To prevent a buckle 12 from becoming an obstacle to an occupant sitting on a seat due to unintended movement even when a seat back 6 is inclined forward or raised up. <P>SOLUTION: In the vehicle seat in which the seat back 6 is provided to be inclined forward toward an upper face of a seat cushion 5 by a hinge 14, the buckle 12 detachably connected to the seat belt 9 is jointed to a vehicle body 4a or the seat cushion 5 by a joint member 21, and supported at adjacent the hinge 14 at a lower part of the seat back. <P>COPYRIGHT: (C)2010,JPO&INPIT

Description

  The present invention relates to a vehicle seat structure.

  Regarding a vehicle seat, it is generally known that the lower part of the seat back and the rear part of the seat cushion are connected by a stay, and when the seat back is tilted forward, the seat cushion is pushed by the stay and slides forward and downward. ing. In a seat provided with this so-called downfold mechanism, Patent Document 1 discloses a space surrounded by a seat back, a seat cushion, and the stay for a webbing that connects an anchor plate provided on a vehicle body floor side and a buckle for a seat belt. It is described that the buckle is disposed on the upper surface of a seat cushion by passing the material through a seat.

Patent Document 2 describes that a seat belt buckle is supported by a self-restoring buckle support member or a spring so that the seat belt is in close contact with the front surface of the seat back. According to this, when using the seat belt, the buckle can be moved away from the seat back and the seat belt tongue can be inserted, and after use, when the seat belt tongue is removed from the buckle, the buckle is restored to the buckle support member independently. The retracted state comes into close contact with the seat back by force or spring force.
JP 2003-80988 A Japanese Utility Model Publication No. 1-1131650

  When the seat belt buckle is arranged on the upper surface of the seat cushion, when the occupant is seated, the buckle may hit the buttocks and feel uncomfortable. Even if the buckle is removed from the seat back so that it does not hit the buttocks, the buckle does not move when the seat back is tilted forward or raised, or when the height of the upper surface of the seat cushion is raised or lowered by the downfold mechanism. There is a risk of moving to a position that interferes with seating.

  In addition, if the buckle is supported by a buckle support member that is self-supporting and is connected to a spring so that the buckle is in close contact with the front surface of the seat back, the buckle support member is greatly deformed when the seat back is tilted forward. Or, the spring is greatly extended. Therefore, when the seat back is raised, the buckle may not return to the storage position.

  The present invention prevents the buckle from being inadvertently displaced and obstructing an occupant sitting on the seat even if the seat back is tilted forward or raised.

  In order to solve the above problems, the present invention supports the buckle at the lower part of the seat back.

A vehicle seat structure according to the present invention restrains a seat cushion provided on a floor of a vehicle, a seat back provided to be able to move forward toward the upper surface of the seat cushion by a hinge, and an occupant seated on the seat cushion. A seat belt, and a buckle to which the seat belt is detachably connected,
The buckle is connected to a vehicle body or the seat cushion by a connecting member, and is supported by the lower part of the seat back in the vicinity of the hinge.

  Therefore, since the buckle is supported by the lower part of the seat back, the buckle is unlikely to obstruct an occupant sitting on the seat. Even if the seat back is tilted forward and then raised, the buckle only rotates around the hinge together with the seat back, and the support position for the seat back does not change. In other words, the buckle does not move unintentionally to a position that interferes with the occupant's seating. Thus, according to the present invention, it is advantageous to avoid the buckle from interfering with the seating of the occupant.

  Further, since the buckle support position with respect to the lower part of the seat back is in the vicinity of the hinge, the rotational movement amount of the buckle accompanying the forward / stand-up movement of the seat back is small. For this reason, it is not necessary to lengthen the connecting member that connects the vehicle body or the seat cushion and the buckle, and the layout of the connecting member is facilitated. Furthermore, since the load of the occupant applied to the seat belt can be received by the vehicle body or the seat cushion by the connecting member, it is not necessary to increase the rigidity to withstand the tension of the seat belt for the seat back and the hinge portion that support the buckle, Suitable for lighter vehicles.

  It is preferable that the buckle is supported at the lower part of the seat back so as to be swingable back and forth. As a result, excessive bending force or tensile force applied to the connecting member in association with the forward or standing movement of the seat back can be avoided by swinging the buckle back and forth, which is advantageous for shortening the length of the connecting member.

  It is preferable that the buckle is accommodated in a receiving tool supported at the lower part of the seat back so as to protrude forward. Thereby, when a passenger | crew's load is added to a seatbelt, even if there exists slack in a connection member, when a buckle protrudes ahead, a connection member will be in a tension state and the said load will be transmitted to a vehicle body or a seat cushion. For this reason, it is possible to avoid damaging the buckle holder and the seat back.

  The buckle is supported by the lower part of the seat back even when the seat cushion is provided with a downward movement mechanism (down-fold mechanism) that moves the seat cushion downward so that the height of the seat cushion is lowered in accordance with the forward movement of the seat back. Therefore, the buckle position does not change regardless of the vertical movement of the seat cushion. This is advantageous in avoiding the buckle from interfering with the seating of the occupant.

  As described above, according to the present invention, the buckle of the seat belt is connected to the vehicle body or the seat cushion by the connecting member and is supported in the vicinity of the hinge at the lower portion of the seat back. Even if it is raised, it does not move and it is advantageous in avoiding the buckle from interfering with the seating of the occupant. In addition, since the amount of rotational movement of the buckle associated with the forward movement of the seat back is small, the layout of the connecting member that connects the vehicle body or the seat cushion and the buckle is facilitated, and the load of the occupant applied to the seat belt can be reduced by the connecting member. Can be received with a seat cushion.

  Hereinafter, embodiments of the present invention will be described with reference to the drawings. It should be noted that the following description of the preferred embodiment is merely illustrative in nature, and is not intended to limit the present invention, its application, or its use.

  FIG. 1 is a perspective view showing the inside of a vehicle provided with a seat structure according to an embodiment of the present invention. The vehicle 1 includes a right rear seat 2 and a left rear seat 3 that are disposed adjacent to each other in the vehicle interior. The illustration of the front seat is omitted. Each of the rear seats 2 and 3 includes a seat cushion 5 provided on the front floor 4a of the vehicle, and a seat back 6 provided with a lower end supported by a hinge so as to be able to move forward toward the upper surface of the seat cushion 5. I have. Behind the rear seats 2 and 3 is a luggage storage portion having a rear floor 4b that is one step higher than the front floor 4a.

  Further, each of the rear seats 2 and 3 restrains a occupant seated on the seat cushion 5 and a downward movement mechanism 8 that moves the seat cushion 5 downward so that the height of the seat cushion 5 decreases as the seat back 6 moves forward. And a buckle 12 to which a tongue 11 attached to the seat belt 9 is detachably connected.

  As shown in FIG. 2, a seat bracket 13 is fixed to the floor 4, and a lower end portion of the seat back 6 is supported on a rear end portion of the bracket 13 so as to be rotated by a hinge 14 extending in the vehicle width direction. ing. The downward movement mechanism 8 includes a front link 15 that connects the bracket 13 and the seat cushion 5, and a rear link 16 that connects the seat cushion 5 and the seat back 6. One end of the front link 15 is rotatably connected to the seat cushion 5, and the other end is rotatably connected to the bracket 13. The rear link 16 is pivotally connected to the seat back 6 at a position where one end is above the hinge 14 when the seat back 6 stands, and the other end pivots to the seat cushion 5 at a position forward of the hinge 14. It is connected freely.

  In this case, when the seat back 6 is erected, the seat cushion 5 hits the lower end of the seat back 6 with the rear end upper surface erected, and is supported by the seat back 6 in a posture in which the occupant is seated by the rear link 16. The When the seat back 6 is tilted forward, the connecting portion at the one end of the rear link 16 rotates forward around the hinge 14 to become lower than the position of the hinge 14, and accordingly the seat cushion 5 is regulated by the front link 15. While moving down. In a state where the seat back 6 is completely moved forward so as to overlap the upper surface of the seat cushion 5, the back surface of the seat back 6 is flush with the rear floor 4a.

  As shown in FIG. 3, a notch 17 is formed in the rear end side portion of the seat cushion 5, and the buckle 12 is disposed in the notch 17. The buckle 12 is supported by the lower portion of the seat back 6 in the vicinity of the hinge 14. In other words, the bag-shaped receiver 18 is supported on the lower front end portion of the seat back 6, and the buckle 12 is accommodated in the bag-shaped receiver 18. The bag-shaped receptacle 18 opens forward and obliquely upward, the buckle 12 is accommodated in the bag-shaped receptacle 18 so as to protrude from the opening, and the slot 12a into which the tongue 11 is inserted is a bag-like shape. Looking through the opening of the receptacle 18. Further, the upper portion of the buckle 12 protrudes upward from the upper surface of the rear end portion of the seat cushion 5 so that the tongue 11 can be easily inserted into the buckle 12 in a state where the seat back 6 stands up.

  The bag-shaped receiver 18 of this example is made of cloth, and the upper part of the rear surface is sewn on the skin of the seat back 6 and is suspended so that it can swing back and forth while the buckle 12 is accommodated. In addition, an opening 19 for operating the button 12b for releasing the engagement with the tongue 11 of the buckle 12 is provided on the side surface of the bag-shaped receiver 18.

  As shown in FIG. 4, the buckle 12 is connected to the floor 4 a by a connecting member 21. The connecting member 21 is formed in a belt shape and extends downward through a space surrounded by the notch 17 of the seat cushion 5, the seat back 6 and the rear link 16. The lower end of the connecting member 21 is connected to the floor 4a by a pin 22 so as to be rotatable forward and backward.

  Therefore, as shown in FIGS. 3 and 4, when the seat back 6 stands up, the buckle 12 housed in the bag-like receiver 18 below the seat back 6 is cut off at the rear end side portion of the seat cushion 5. Looking through the notch 17, the tongue 11 of the seat belt 9 can be inserted into the buckle 12. Although the upper end of the buckle 12 protrudes slightly upward from the upper surface of the rear end portion of the seat cushion 5, the buckle 12 is positioned at the side end portion of the rear end of the seat cushion 5 and supported by the lower portion of the seat back 6. It does not interfere with passenger seating. Further, as shown in FIG. 5, even when the luggage G placed on the seat cushion 5 is on the buckle 12, the lower part of the seat back 6 is deformed and the buckle 12 sinks. There is no hindrance.

  When a passenger's load is applied to the seat belt 9 due to a vehicle collision or the like, the load is received by the connecting member 21 on the floor 4a. In this case, even if the connecting member 21 is loose, when the passenger's load is applied to the seat belt 9, the buckle 21 protrudes forward from the bag-shaped receiver 18 and the connecting member 21 is in a tensioned state. For this reason, it is possible to avoid damaging the seat back 6 and the bag-shaped receptacle 18. As described above, since the tension of the seat belt 9 is not applied to the seat back 6 and the hinge 14, it is not necessary to increase the rigidity to withstand the tension of the seat belt, and it is suitable for weight reduction of the vehicle.

  As shown in FIG. 6, when the seat back 6 is tilted forward, the seat cushion 5 moves downward so that its height is lowered. However, the buckle 12 is supported by the lower part of the seat back 6 while being accommodated in the bag-shaped receiving member 18, and the buckle 12 is not moved forward and the seat cushion 5 is lowered. The support position does not change. As the seat back 6 moves forward, the buckle 12 rotates backward around the hinge 14, but the support position of the buckle 12 is in the vicinity of the hinge 14, so the rotational movement amount is small. For this reason, it is not necessary for the connecting member 21 to have a large allowance for allowing the rotational movement of the buckle 12. In addition, since the buckle 12 can be swung back and forth while being accommodated in the bag-shaped receptacle 18, it is possible to avoid applying excessive bending force or tensile force to the connecting member 21 when the seat back 6 is moved forward.

  Even when the seat back 6 is returned from the forward-turned state shown in FIG. 6 to the standing state shown in FIG. 4, the buckle 12 is merely rotated together with the seat back 6 while being accommodated in the bag-shaped receiving member 18. The support position for 6 does not change. That is, the buckle 12 does not move to a position that obstructs the seating of the occupant.

  In the embodiment, the buckle receiver 16 is made of cloth, but may be made of leather or synthetic resin.

  Further, the buckle receiver is not limited to the bag shape, and both side portions thereof may be coupled to the lower portion of the seat back 6 as a channel-shaped receiver, and the buckle 12 may be received by the recessed portion of the channel-shaped receiver. . Or you may make it suspend the buckle 12 to the lower part of the seat back 6 with a hook, without employ | adopting a receiver.

It is a perspective view which shows the seat structure of a vehicle. It is a side view which shows the downward movement mechanism of a seat cushion. It is a perspective view which shows the support structure of a buckle. It is a longitudinal cross-sectional view which shows the relationship between a buckle and a sheet | seat in a seat back standing state. FIG. 5 is a view similar to FIG. 4 showing a state in which a load is placed on the seat cushion. It is a longitudinal cross-sectional view which shows the relationship between a buckle and a sheet | seat in a seat back forward state.

DESCRIPTION OF SYMBOLS 1 Vehicle 2, 3 Seat 4a Car body floor 5 Seat cushion 6 Seat back 8 Downward moving mechanism 9 Seat belt 12 Buckle 14 Hinge 18 Receptacle 21 Connecting member

Claims (4)

A seat cushion provided on a floor of a vehicle, a seat back provided by a hinge so as to be able to move forward toward the upper surface of the seat cushion, a seat belt for restraining an occupant seated on the seat cushion, and the seat belt With a buckle that is detachably connected,
A seat structure for a vehicle, wherein the buckle is connected to a vehicle body or the seat cushion by a connecting member and is supported by the lower portion of the seat back in the vicinity of the hinge. In claim 1,
The vehicle seat structure according to claim 1, wherein the buckle is supported at the lower portion of the seat back so as to be swingable back and forth. In claim 1,
The vehicle seat structure according to claim 1, wherein the buckle is accommodated in a support supported at a lower portion of the seat back so as to protrude forward. In any one of Claim 1 thru | or 3,
A vehicle seat structure, comprising: a downward movement mechanism that moves the seat cushion downward so that the height of the seat cushion decreases in accordance with the forward movement of the seat back.

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