JP2018199491A - Vehicle seat - Google Patents

Abstract

To improve sitting comfort of a seat.SOLUTION: A vehicle seat includes: a seat frame having right and left side frames which are disposed separated from each other in a lateral direction; a pressure receiving member 40 disposed between the right and left side frames; and a connection member (an upper connection wire W1) which connects the pressure receiving member 40 to the seat frame to cause the pressure receiving member 40 to be supported by the seat frame. The pressure receiving member 40 includes: a pressure receiving part 41 disposed at a center part in the lateral direction between the right and left side frames; and support parts 42 which extend from parts at both end parts of the pressure receiving part 41 to the outer side in the lateral direction. The connection member supports the pressure receiving part 41 and supports the support parts 42.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat including a seat cushion, a seat back, and a headrest.

  Conventionally, at the time of a rear collision, the upper part of the occupant who is going to move backward due to inertia is submerged in the seat back so that the occupant's head approaches the headrest and the impact on the neck is reduced. A vehicle seat is known (see Patent Document 1). In this vehicle seat, a plate-shaped pressure receiving member is provided in the seat back, and the pressure receiving member supports the load from the upper body of the occupant during normal use, and the pressure receiving member moves rearward in the event of a rear collision. By being able to do so, the upper body of the occupant is sunk into the seat back. And the seat back pad has a central portion facing the upper back of the occupant and side portions provided on both the left and right sides of the central portion and projecting forward. It was only placed behind.

JP 2010-83268 A

  By the way, the vehicle seat is required to have a comfortable sitting without feeling uncomfortable when the occupant sits down.

  The present invention has been made in view of the background as described above, and an object of the present invention is to provide a vehicle seat that improves sitting comfort.

The vehicle seat of the present invention that solves the above-described problems includes a seat frame having left and right side frames that are spaced apart from each other, a pressure receiving member that is disposed between the left and right side frames, and a pressure receiving member. And a connecting member that is connected to and supported by the seat frame. The pressure receiving member includes a pressure receiving portion disposed at a central portion in the left-right direction between the left and right side frames, and a support portion extending outward in the left-right direction from a part of both ends in the left-right direction of the pressure receiving portion. The connecting member supports the pressure receiving portion and the support portion.
The vehicle seat includes a seat cushion, a seat back, and a headrest. The seat back includes a seat back frame that constitutes a frame of the seat back, a seat back pad that covers the seat back frame, and a seat back frame. A vehicle seat configured to sink the upper body of the occupant into the seat back when a backward movement load acts on the seat back from the upper body of the occupant, The seat back pad has a central part facing the upper back of the occupant, and left and right side parts provided on the left and right sides of the central part and projecting forward from the central part, and the pressure receiving member is The seat back is arranged corresponding to the central portion, and the left and right side frames of the seat back frame are connected via the connecting members. A pressure receiving portion connected to the left and right ends of the pressure receiving portion; and a support portion disposed behind the side portion extending outward in the left-right direction. An extending groove may be formed.

  According to such a configuration, the pressure-receiving member extends not only to the pressure-receiving portion disposed behind the center portion of the seatback pad but also to the outside in the left-right direction and forward from both ends in the left-right direction of the pressure-receiving portion. Since it also has a support part arranged behind the side part, when a rearward movement load is generated, both the pressure receiving part and the support part are loaded from the seat back pad. Is transmitted and the occupant can be quickly sunk into the seat back. In particular, when a rear collision occurs, such as when the occupant is not properly seated or on a ramp or turning, the load applied to the seat from the occupant may shift slightly to the left or right. Even in such a case, according to the vehicle seat of the present invention, the load from the occupant can be effectively received and the occupant can be quickly sunk into the seat back. And since the groove part is provided in the front surface of the side part of a seat back pad, a seat back pad is easy to bend.

  And the vehicle seat supports the upper end edge of the support portion lower than the upper end edge of the pressure receiving portion, compared to the case where the upper end edge of the pressure receiving portion extends to the upper end edge of the support portion at the same height. It is difficult for the occupant to feel a hit at the upper corners of the part, and a good sitting comfort can be realized. In addition, the seat back pad is not a sports type seat, and unlike a sports type seat, the seat back pad has a small amount of protrusion to the front of the side part. Inappropriate interference with the pad may occur, but in the vehicle seat of the present invention, the upper end edge of the support portion is lower than the upper end edge of the pressure receiving portion, so that inappropriate interference between the support portion and the seat back pad occurs. Can be suppressed.

  In the vehicle seat described above, there may be a step between the upper end edge of the support portion and the upper end edge of the pressure receiving portion.

  According to such a structure, it becomes easy to bend | curve in the fundamental part which a support part extends from a pressure receiving part, and soft seating comfort can be implement | achieved.

  In the vehicle seat described above, a reinforcing portion can be provided at the upper end edge of the support portion.

  If the portion where the upper edge of the support portion is lower than the upper edge of the pressure receiving portion is referred to as an “escape portion” for convenience in this specification, the relief portion is formed in the support portion, so that the rigidity of the support portion is increased. Somewhat smaller. However, according to said structure, the rigidity reduction of the support part by formation of a relief part can be reinforced by providing the reinforcement part in the upper end edge. Therefore, according to this configuration, it is possible to give a solid support feeling to a sports type seat or the like.

  In the vehicle seat described above, the support portion may be provided with a bead portion protruding rearward, and the bead portion may extend obliquely upward on the outer side in the left-right direction.

  According to such a configuration, it is possible to reinforce the decrease in rigidity of the support portion due to the formation of the relief portion in the support portion by the bead portion, and to give a firm support feeling in a sports type seat or the like.

  In the vehicle seat having the above-described bead portion, a reinforcement portion is provided at least at an upper end edge of the edge portion of the support portion, and the bead portion extends to the reinforcement portion.

  According to such a structure, the rigidity of a support part can be made higher and a more firm support feeling can be given to a vehicle seat.

  In each of the vehicle seats described above, the connecting member may be configured to pass behind the support portion.

  According to such a configuration, when the support portion is pushed rearward, a load is applied rearward to the connecting member by the support portion, so that the occupant can be quickly sunk into the seat back at the time of the rear collision.

  In the vehicle seat described above, the support portion may have an engaging claw with which the connecting member engages.

  According to such a configuration, since the connecting member and the support part are integrated and difficult to shift, it is difficult for noise due to vibration to occur, and when a large load is applied to the support part, the connection part is connected from the support part. A load can be efficiently transmitted to a member.

  In the vehicle seat described above, a fixing member for attaching an airbag device is provided on the side frame, and the fixing member is at a height above the lower end of the upper end edges of the support portion. It is desirable that they are arranged.

  According to such a structure, it can suppress that fixing members, such as a volt | bolt for attaching an airbag apparatus, interfere with a support part.

  According to the present invention, the seating comfort of the seat can be improved.

1 is a perspective view of a vehicle seat as a vehicle seat according to an embodiment. It is a perspective view of a seat frame built in a vehicle seat. It is a rear view of a pressure receiving member. It is a vertical sectional view showing a side part and a support part of the seat back pad. It is a rear view of the pressure receiving member which concerns on a 1st modification. It is a rear view of the pressure receiving member which concerns on a 2nd modification. It is a rear view of the pressure receiving member which concerns on a 3rd modification. It is the perspective view which looked at the pressure receiving member which concerns on a 4th modification from the back. It is the perspective view which looked at the pressure receiving member which concerns on a 5th modification from back.

  Next, an embodiment of the present invention will be described in detail with reference to the drawings as appropriate. In the following description, first, the overall configuration of a vehicle seat as an example of a vehicle seat will be briefly described, and then the characteristic part of the present invention will be described in detail.

  As shown in FIG. 1, the vehicle seat S is a seat used for a driver's seat of an automobile, and mainly includes a seat cushion S1, a seat back S2, and a headrest S3.

  A seat frame F as shown in FIG. 2 is built in the seat cushion S1 and the seat back S2. The seat frame F is mainly composed of a seat cushion frame F1 constituting a frame of the seat cushion S1 and a seat back frame F2 constituting a frame of the seat back S2. As shown in FIG. 1, the seat cushion S1 is configured by covering a seat cushion frame F1 with a seat cushion pad P1 made of a cushion material such as urethane foam, and a skin material made of synthetic leather, fabric, or the like. S2 is configured by covering the seat back frame F2 with a seat back pad P2 made of a cushioning material and a skin material made of synthetic leather or fabric.

  The seat back pad P <b> 2 has a central portion 51 that faces the upper back of the occupant, and left and right side portions 52 that are provided on both the left and right sides of the central portion 51 and project forward from the central portion 51. .

As shown in FIG. 2, the seat cushion frame F1 is installed on the floor of the automobile via the slide rail SL. Thereby, the vehicle seat S can adjust the front-rear position. The lower portion of the seat back frame F2 is rotatably connected to the rear portion of the seat cushion frame F1 via a reclining mechanism RL. As a result, the seat back S2 can tilt forward and backward with respect to the seat cushion S1.
In this specification, front and rear, left and right, and top and bottom are based on an occupant seated on the vehicle seat S in a state where the seat back S2 is not tilted by the reclining mechanism RL.

  The seat back frame F2 mainly includes an upper frame 10, left and right side frames 20, and a lower frame 30, and the upper frame 10, the left and right side frames 20, and the lower frame 30 are integrally formed by welding or the like. It is formed in a combined frame shape. And the pressure receiving member 40 explained in full detail behind is arrange | positioned inside this frame-shaped seat back frame F2.

  The upper frame 10 is made of a pipe material bent in a substantially U shape, and a pair of left and right support brackets 12 for attaching the headrest S3 are fixed to the front side of the horizontal pipe portion 11 extending in the left-right direction by welding. Yes. Further, the left and right vertical pipe portions 13 extending in the vertical direction of the upper frame 10 constitute a left and right side frame 20 integrally with the left and right side frame main body portions 21 coupled to the lower portion thereof.

  The left and right side frame main body portions 21 are formed in a substantially U shape in sectional view by pressing a metal plate or the like, and are arranged to face in the left-right direction. The side frame main body portion 21 is coupled to the vertical pipe portion 13 while holding the vertical pipe portion 13 at the upper portion thereof, and has a protruding portion 22 whose lower portion projects forward from the upper portion. Is formed.

The pressure receiving member 40 is a plate-like member made of resin or the like, and is disposed behind the occupant between the left and right side frames 20. The pressure receiving member 40 is disposed corresponding to the central portion 51 of the seat back pad P2, is disposed behind the side portion 52, and the pressure receiving portion 41 that supports the back of the occupant via the central portion 51. And a support portion 42 that supports the upper body side portion of the occupant.
The pressure receiving member 40 is supported from behind by an upper connection wire W1 and a lower connection wire W2 as an example of a connection member, and both left and right side frames W11, W21 (see FIG. 3) of the upper connection wire W1 and the lower connection wire W2. 20 is connected.

The pressure receiving portion 41 is formed with a relatively large area (an area that covers at least 1/3 or more of the internal space of the frame-like seat back frame F2) in order to support the occupant's back on a wide surface.
The support portion 42 is formed integrally with the pressure receiving portion 41 so as to extend from the left and right ends of the pressure receiving portion 41 to the outside in the left and right direction and forward. More specifically, the support part 42 extends from a position at a height corresponding to the upper body side part in a predetermined range below the side of the occupant among the left and right end parts of the pressure receiving part 41.
As shown in FIG. 3, in the pressure receiving portion 41, the width of the portion above the support portion 42 is larger than the width of the portion below the support portion 42. That is, since the pressure receiving part 41 becomes wider as it goes up and is along the body shape of the occupant, the occupant can be supported stably.

The upper end edge 41A of the pressure receiving portion 41 extends substantially linearly in the horizontal direction, and the upper end edge 42A of the support portion 42 extends outward in the left-right direction from a position one step lower than the upper end edge 41A of the pressure receiving portion 41. That is, a step is formed between the upper edge 41A and the upper edge 42A.
The lower end edge 42B of the support portion 42 extends from the height position near the center of the left and right end portions of the pressure receiving portion 41 toward the outside in the left-right direction and upward. As shown in FIG. 4, the support part 42 is arrange | positioned so that it may enter into the recessed part 52A provided in the inner surface of the side part 52 of the seat back pad P2. That is, the portion of the side portion 52 that faces the support portion 42 is formed thinner than the upper and lower portions by the formation of the concave portion 52A, which makes it easier to bend when a large load is applied from the occupant. It has become. Further, groove portions 52B are provided on the front surface of the seat back pad P2 corresponding to the upper and lower positions of the support portion 42, so that the seat back pad P2 is more easily bent. As described above, the portion of the side portion 52 corresponding to the support portion 42 is easily bent, so that the load from the occupant can be easily transmitted to the support portion 42. Such ease of bending, on the other hand, makes it easier for the support portion 42 and the seat back pad P2 to interfere with each other, but the support portion 42 of the present embodiment is provided with a relief portion, so that the seat back pad is provided. Interference between P2 and the support portion 42 is effectively suppressed.

  As shown in FIG. 3, the pressure receiving portion 41 is provided with a plurality of bead portions that protrude rearward and are recessed as viewed from the front. As the bead portion, a plurality of first bead portions B1 extending in the vertical direction, the first bead portion B1 are connected at the lower portion, the second bead portion B2 extending in the horizontal direction, and the left and right of the first bead portion B1 Three third bead portions B3 extending from the two upper portions provided on the outermost side toward the outer side in the left-right direction and obliquely upward are provided. The third bead part B <b> 3 extends from the pressure receiving part 41 across the boundary of the support part 42, and its tip extends to the vicinity of both left and right ends of the support part 42.

The pressure receiving member 40 is provided with a plurality of claw portions that engage with the upper connecting wire W1 and the lower connecting wire W2. Specifically, as an engaging claw for supporting the upper connecting wire W1, a first engaging claw 45A positioned at the center upper end portion of the pressure receiving portion 41 and a laterally outer side of the first engaging claw 45A, Two second engaging claws 45B located at the left and two third engaging claws 45C located at the slightly upper support portion 42 outside the second engaging claws 45B in the left-right direction. In addition, as an engaging claw for supporting the lower connecting wire W2, a fourth engaging claw 46A located at the lower center of the pressure receiving portion 41 and 2 located slightly below the left and right sides of the fourth engaging claw 46A. Two fifth engaging claws 46B are provided.
Among the above engaging claws, the third engaging claw 45C provided on the support portion 42 is provided between the third bead portions B3 arranged vertically. For this reason, the thickness of the support part 42 can be suppressed compared with the case where an engaging claw is provided on the bead part. Further, since the third engagement claw 45C is provided between the third bead portions B3 that improve the rigidity of the support portion 42, stable support by the upper connecting wire W1 is possible.

The upper connecting wire W1 is bent vertically so as to engage with the first engaging claw 45A, the second engaging claw 45B, and the third engaging claw 45C described above and pass through them. The upper connecting wire W1 is bent downward at both left and right end portions W11, and is not shown in the figure, but is locked to the cylindrical locking portions provided on the side frame 20 at both end portions W11. ing.
The upper connecting wire W1 passes in the left-right direction behind the support portion 42, and supports the support portion 42 from behind. Further, the upper connecting wire W <b> 1 is less likely to be displaced with respect to the support portion 42 by being engaged with the third engagement claw 45 </ b> C provided in the support portion 42.

  The lower connecting wire W2 is bent up and down so as to engage with the fourth engaging claw 46A and the fifth engaging claw 46B described above and pass through them. The lower connecting wire W2 is locked to the lower end of the swing mechanism 60 (see FIG. 2) at the left and right ends W21. The swing mechanism 60 is a well-known mechanism composed of a link swinging back and forth and a spring. Normally, the link is positioned forward by the urging force of the spring, but a load applied rearward to the lower end of the link. When it is applied with a predetermined size or more, it operates to swing backward at a stretch.

  As shown in FIG. 2, the vertical pipe portion 13 on the right side of the side frame 20 is provided with a bracket 71, and an airbag device 72 is fixed to the bracket 71 with a bolt 73 as an example of a fixing member. . The bolt 73 is disposed at a height lower than the upper end edge 41 </ b> A of the pressure receiving portion 41 and higher than the upper end edge 42 </ b> A of the support portion 42. For this reason, although the head of the bolt 73 protrudes inward in the left-right direction, interference with the support portion 42 is suppressed.

The effects of the vehicle seat S configured as described above will be described.
When the occupant is sitting on the vehicle seat S, the load on which the occupant's upper body leans against the seat back S2 is normally supported by the pressure receiving member 40 via the seat back pad P2, as shown in FIG. The pressure receiving member 40 slightly moves backward due to the elasticity of the upper connecting wire W1 and the upper connecting wire W1 to support the upper body of the occupant. At this time, the upper back portion of the occupant is supported by the central portion 51 of the seat back pad P <b> 2, and the central portion 51 is supported by the pressure receiving portion 41 of the pressure receiving member 40. Further, in the upper body side portion of the occupant, from the shoulder to the vicinity of the armpit, it is supported by the side portion 52 of the seat back pad P2, and the side portion 52 is supported by the support portion 42 provided later. Since the upper end edge 42A of the support portion 42 is lower than the upper end edge 41A of the pressure receiving portion 41 and a relief portion is formed, it is difficult for the occupant to feel a sense of contact at the upper corner portion of the support portion 42, and a good sitting comfort is provided. Can be realized.

  Further, since a step is formed between the upper end edge 42A of the support portion 42 and the upper end edge 41A of the pressure receiving portion 41, the support portion 42 is easily bent at the base portion extending from the pressure receiving portion 41 and is soft. Sitting comfort can be realized. But the pressure receiving member 40 in this embodiment is provided with the 3rd bead part B3 which straddles the pressure receiving part 41 and the support part 42, and protrudes back, and the 3rd bead part B3 is diagonally on the outer side in the left-right direction. Since it has extended toward the direction, the rigidity fall of the support part 42 by having formed the escape part is reinforced, and the moderate support feeling of a passenger | crew's upper body side part can also be exhibited.

  Moreover, since the support part 42 has the 3rd engagement nail | claw 45C as an engagement claw with which the upper connection wire W1 engages, and is engaging with the upper connection wire W1 by the 3rd engagement claw 45C, it is upper connection. The wire W1 and the support portion 42 are less likely to be displaced together, and abnormal noise due to vibration is less likely to occur.

  When a backward moving load is generated on the occupant, such as when the vehicle collides from behind, the upper body of the occupant is strongly pressed against the seat back pad P2. At this time, the load applied to the seat back pad P <b> 2 is applied to the pressure receiving portion 41 via the central portion 51 and also to the support portion 42 via the side portion 52. The pressure receiving member 40 receives a load from the pressure receiving portion 41 and the support portion 42 and moves backward while swinging the swing mechanism 60 backward. In this way, the pressure receiving member 40 can effectively receive the load from the occupant, and the occupant can be quickly sunk into the seat back S2. In particular, in the vehicle seat S of the present embodiment, since the upper connecting wire W1 passes behind the support portion 42, when the support portion 42 is pushed backward by a load from the upper body side portion of the occupant, the support portion Since the load is applied to the upper connecting wire W1 by 42, the occupant can be quickly sunk into the seat back S2.

At this time, as shown in FIG. 4, the support portion 42 is disposed so as to enter the concave portion 52 </ b> A of the side portion 52, but the escape portion is formed, so that it is inappropriate for the seat back pad P <b> 2. Interference can be suppressed. In particular, in the normal type seat, unlike the sports type seat, the amount of protrusion of the side portion 52 to the front is small, so that interference with the seat back pad P2 is likely to occur. The presence of the escape portion can suppress inappropriate interference.
At this time, since the third engagement claw 45C is engaged with the upper connection wire W1, the upper connection wire W1 and the support portion 42 are not easily displaced together, and the support portion 42 is large from the upper connection wire W1. When a load is applied, the load can be efficiently transmitted to the upper connecting wire W1.

Although the embodiments of the present invention have been described above, the present invention is not limited to the above-described embodiments, and can be appropriately modified and implemented.
For example, as in the pressure receiving member 140 according to the first modification shown in FIG. 5, the third bead portion B31 may be formed so as to extend in the horizontal direction instead of extending obliquely outward in the left-right direction. Good. Further, like the pressure receiving member 240 according to the second modification shown in FIG. 6, a step is not provided between the upper end edge 242 </ b> A of the support portion 242 and the upper end edge 41 </ b> A of the pressure receiving portion 41. The upper end edge 242A of the support part 242 may be continuous with the left and right ends, and may be formed so as to be gradually lowered toward the outside. Thus, when the upper end edge 242A is gradually lowered toward the outer side in the left-right direction, the fixing member that fixes the airbag device 72 to the side frame 20 is below the upper end edge 41A of the pressure receiving portion 41. Of the upper end edge 242A of the support portion 242, it may be arranged at a height above the lower end (that is, both end portions in the left-right direction).

  Further, as an intermediate form between the form shown in FIG. 6 and the form shown in FIG. 3, the upper end edge 242A may have a curved shape (arc shape or the like) that protrudes downward (not shown). Further, like the pressure receiving member 340 according to the third modification shown in FIG. 7, the third bead portion B31 in FIG. 5 and the upper edge 242A in FIG. 6 may be combined.

  Further, as a form to reinforce the support portion 42, as in the pressure receiving member 440 according to the fourth modification shown in FIG. 8, a flange shape in which the edge is turned up later from the upper end edge 442 A to the lower end edge 442 B of the support portion 42. The reinforcing portion 445 can be provided. According to this, the rigidity part 445 reinforces the rigidity fall by providing the escape part in the support part 42, and rigidity can be made high, and a solid support feeling can be given to the vehicle seat S. In addition, the reinforcement part 445 should just be provided at least at the upper end edge 442A adjacent to the escape part.

  In the form of FIG. 8 in which the reinforcing portion 445 is provided, the third bead portion B3 can be extended to the reinforcing portion 445 as indicated by a two-dot chain line. According to this, the rigidity of the support part 42 can be made higher and a more solid support feeling can be given to the vehicle seat S.

  Further, like the pressure receiving member 540 according to the fifth modification shown in FIG. 9, the flange-shaped reinforcing portion 545 is provided on the entire circumference of the pressure receiving member 540, that is, on the entire edges of the pressure receiving portion 41 and the support portion 42. It can be. According to such a configuration, it is possible to increase the overall rigidity of the pressure receiving member 40, and it is possible to provide a comfortable and comfortable sitting comfort in a sports-type seat or the like.

  In addition, although the above-mentioned reinforcement parts 445 and 545 were provided by the flange shape which turned the edge back later, it can also be formed by a bead or a thick part.

  In the above-described embodiment, the bolt 73 is exemplified as the fixing member. However, the fixing member may be a nut, a clip used to fasten vehicle interior parts, a rivet, or the like.

  The specific configuration of the seat frame F (the seat cushion frame F1 and the seat back frame F2) shown in the embodiment is an example, and the present invention is not limited to the configuration of the embodiment. For example, in the above-described embodiment, the left and right side frames 20 of the seat back frame F2 are configured by the pipe-shaped vertical pipe portion 13 and the plate-shaped side frame main body portion 21, but are not limited thereto. The side frame may be composed of only a pipe-shaped frame or may be composed of only a plate-shaped frame.

  In the said embodiment, although the vehicle seat S used by a motor vehicle was illustrated as a vehicle seat, this invention is not limited to this, For example, the sheet | seat used for a ship, an aircraft, etc. It can also be applied to.

20 Side frame 30 Lower frame 40 Pressure receiving member 41 Pressure receiving portion 41A Upper end edge 42 Support portion 42A Upper end edge 42B Lower end edge 51 Central portion 52 Side portion 72 Airbag device 73 Bolt 445, 545 Reinforcement portion B3, B31 Third bead portion P2 Sheet Back pad S Vehicle seat S1 Seat cushion S2 Seat back S3 Headrest W1 Upper connecting wire W2 Lower connecting wire

Claims (1)

A seat frame having left and right side frames that are spaced apart from each other;
A pressure receiving member disposed between the left and right side frames;
A connecting member that connects and supports the pressure receiving member to the seat frame;
The pressure-receiving member includes a pressure-receiving portion disposed at a central portion in the left-right direction between the left and right side frames, and a support portion extending outward in the left-right direction from a part at both ends in the left-right direction of the pressure-receiving portion. Prepared,
The connecting member supports the pressure receiving portion and supports the support portion,
Each of the support portions has a third engagement claw with which the connection member is engaged,
The pressure receiving portion includes a first engaging claw that engages with the connecting member, which is positioned above the third engaging claw, and a connecting member that is positioned below the third engaging claw. A vehicle seat, comprising: a second engaging claw that fits together.

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