JP7130338B2 - sheet - Google Patents

Description

The present invention relates to a vehicle seat in which a seated occupant is restrained by a seatbelt.

Patent Document 1 discloses a vehicle that includes a rear seat and a seat belt. The rear seat has a seat cushion and a seat back. The seat belt restrains an occupant seated in the rear seat.

JP 2009-132314 A

The seat belt has a shoulder belt that extends from the upper rear side of the seat back, is stretched over one end of the upper end portion of the seat back, and is stretched obliquely from the shoulder to the waist of the occupant. One end of the upper end of the seatback is generally flat. Therefore, in the event of a vehicle collision, the occupant's shoulder that is not restrained by the shoulder belt is displaced forward, and the clavicle and shoulder of the occupant that is restrained by the shoulder belt may slip out of the shoulder belt. For example, in the case of a vehicle offset frontal collision in which the right front of the vehicle collides, a clockwise rotational force acts on the vehicle. At that time, in the left rear seat, the right shoulder, which is not restrained by the shoulder belt, is displaced further away from the seat back than the left shoulder, which is engaged by the shoulder belt. And the left shoulder is easy to come off from the shoulder belt. It is conceivable to detect a collision with an acceleration sensor, etc., and electrically shift the position of the seat belt to make it difficult for the occupant's shoulder to slip out of the shoulder belt. .

SUMMARY OF THE INVENTION One of the objects of the present invention is to provide a seat that has a simple and inexpensive structure and can prevent the occupant's shoulders from slipping out of the seat belt.

A sheet according to one aspect of the present invention includes
A seat having a seat back that tilts toward the rear of the vehicle during normal use of the vehicle,
The upper end of the seat back is
one end where the seat belt is stretched;
the other end where the seat belt is not stretched;
and an inclined surface provided at the one end,
The inclined surface is a surface that descends downward from the one end side toward the other end side.

In the event of a vehicle collision, particularly in the event of an offset frontal collision, the seat may pivot forward of the vehicle due to inertia so that the seat back is more or less upright. When the above-mentioned seat is in normal use before a vehicle collision, the seat back is tilted toward the rear of the vehicle. is displaced so that Since the seat has the inclined surface at one end of the upper end portion, the seat belt is pressed against the inclined surface by the displacement. Therefore, the seat belt can be slid from one end side toward the other end side on the inclined surface. That is, the seat belt can be shifted toward the occupant by the inclined surface. Therefore, the seat can prevent the occupant's shoulder from slipping off the seat belt in the event of a vehicle collision, particularly in the event of an offset frontal collision. In addition, as described above, the seat has a simple and inexpensive configuration in which the seat back tilts rearward during normal use and has an inclined surface. It eliminates the need for a device that detects a collision and electrically shifts the position of the seat belt. Therefore, the sheet is less likely to cause an increase in cost, an increase in weight, and a decrease in productivity.

1 is a front view showing a seat according to an embodiment; FIG. FIG. 2 is a side view showing the seat according to the embodiment.

An embodiment of the sheet of the present invention will be described with reference to FIGS. 1 and 2. FIG. In the drawings, "LH" indicates the left side of the vehicle equipped with the seat 1 according to the embodiment, "RH" indicates the right side, "UP" indicates the upper side, "LWR" indicates the lower side, "FR" indicates the front side, and "RR" indicates the rear side. indicate. "OUT" indicates the outside of the vehicle, and "IN" indicates the inside.

<<Embodiment>>
[Seat]
A vehicle occupant 100 sits on the seat 1 according to the embodiment. FIG. 1 shows the occupant 100 as a dummy for convenience of explanation. The seat 1 has a seat back 3 that supports the back of the occupant 100. - 特許庁The seat back 3 is tilted rearward of the vehicle. The seat 1 may also have a headrest 4 . One of the features of the seat 1 in this embodiment is that it has a specific inclined surface 351 at a specific location on the upper end portion 30 of the seat back 3 . The following description will be given in the order of the seat belt 10 and the seat back 3 . In this embodiment, a case where the seat 1 is a rear seat on the left side of a right-hand drive vehicle will be described as an example. That is, the left side of the seat 1 is the outer side in the vehicle width direction, and the right side is the inner side in the vehicle width direction. 1 and 2 show the seat 1, the seat belt 10, and the occupant 100 before the collision of the vehicle with solid lines for convenience of explanation, and the seat 1 (only FIG. 2), the seat belt 10, and the occupant 10 at the time of the collision of the vehicle. 100 is indicated by a two-dot chain line.

[Seat belt]
The seat belt 10 is a continuous three-point seat belt. A known configuration can be used for the seat belt 10 . The seat belt 10 has a shoulder belt 11, a lap belt, a slip guide, a tongue plate, an anchor buckle, and a retractor. Illustration of the members of the seat belt 10 other than the shoulder belt 11 is omitted. The shoulder belt 11 extends from the upper left rear side of the seat back 3 and is stretched diagonally from the left shoulder to the right hip of the occupant 100 seated on the seat 1 . The lap belt traverses around the abdomen of the occupant 100 from right to left. The slip guide defines the boundary position between the shoulder belt 11 and the lap belt. The tongue plate is provided integrally with the slip guide and is detachably fitted to the anchor buckle. The anchor buckle is provided on the right side of the seat 1 in this example. The retractor retracts the seat belt 10. - 特許庁A retractor is provided, for example, in the C-pillar.

[Seat back]
(upper end)
The upper end portion 30 of the seat back 3 has one end portion 31 over which the shoulder belt 11 of the seat belt 10 is stretched and the other end portion 32 over which the shoulder belt 11 is not stretched. The one end portion 31 is the outer side in the vehicle width direction, that is, the left side of the seat back 3 in this embodiment. The other end portion 32 is the inner side in the vehicle width direction, that is, the right side of the seat back 3 in this embodiment. The one end portion 31 and the other end portion 32 are located on the outer side and the inner side of the headrest 4 in the vehicle width direction. The upper end portion 30 has an inclined surface 351 provided at one end portion 31 .

<Inclined surface>
The inclined surface 351 prevents the clavicle and shoulders of the occupant 100 from slipping out of the shoulder belt 11 in the event of a vehicle collision, particularly in the event of a vehicle offset frontal collision, as will be described later in detail. The inclined surface 351 is inclined downward from the side of the one end 31 to the side of the other end 32 at the one end 31 , that is, from the outer side to the inner side in the vehicle width direction, and from the left side to the right side of the seat back 3 . do. The inclined surface 351 is provided only on the one end portion 31 in this embodiment. Note that the inclined surface 351 may be provided on a portion other than the one end portion 31 as described later.

When the seat back 3 is tilted toward the rear of the vehicle during normal use of the seat 1 before a vehicle collision, the sloped surface 351 and the shoulder belt 11 are formed where the sloped surface 351 is formed when the seat back 3 is viewed upward. are overlapped. Specifically, the inclined surface 351 overlaps the shoulder belt 11 so that the shoulder belt 11 is pressed against the inclined surface 351 in the event of a vehicle collision. If they overlap in this way, the inclined surface 351 and the shoulder belt 11 may or may not be in contact with each other during normal use. During normal use, the inclined surface 351 and the shoulder belt 11 may be pressed against each other. By pressing the shoulder belt 11 against the inclined surface 351 at the time of a vehicle collision, it is possible to prevent the clavicle and shoulders of the occupant 100 from slipping out of the shoulder belt 11 . In particular, the shoulder belt 11 is preferably positioned above the inclined surface 351 during normal use. In this embodiment, the inclined surface 351 is formed on the surface of the convex portion 35 protruding upward from the upper end portion 30 on the side of the other end portion 32 . The inclination angle and length of the inclined surface 351 may be such that the shoulder belt 11 slides down the inclined surface 351 without going up when the vehicle collides.

The inclined surface 351 may be formed continuously on the seat back 3 , or may be provided at the upper end portion 30 of the seat back 3 by separately attaching an independent member having the inclined surface 351 to the seat back 3 . In any case, it is preferable that the material of the portion forming the inclined surface 351 is harder than the material of the other portions of the seat back 3 . For example, when the inclined surface 351 is formed continuously on the seat back 3, the material of the portion of the seat back 3 forming the inclined surface 351 is made harder than the material of the other portions. When the independent member having the inclined surface 351 is provided, the material of the independent member itself is made harder than the seat back 3 . This makes it difficult for the independent member to deform due to contact with the seatbelt 10 when the vehicle collides, and the seatbelt 10 easily slides on the inclined surface 351 .

(others)
The seat back 3 may have a variable inclination angle by a reclining mechanism. When a reclining mechanism is provided, a mechanism is provided on the rotating shaft of the seat back 3 with respect to the seat cushion to incline the seat back 3 toward the front of the vehicle by a predetermined angle when a predetermined load acts on the vehicle during a vehicle collision. can be By doing so, the shoulder belt 11 can be slid downward on the inclined surface 351 in the event of a vehicle collision, and the clavicle and shoulders of the occupant 100 can be effectively prevented from slipping out of the shoulder belt 11 .

[Explanation of operation at the time of vehicle collision]
The operation of the seat belt 10 at the time of vehicle collision will be described. Here, an offset frontal collision in which the right front of the vehicle collides will be described as an example. During normal use of the seat 1 before an offset frontal collision, the seat back 3 is tilted rearward of the vehicle as indicated by the solid line (FIG. 2). The shoulder belt 11 is stretched over the inclined surface 351 as indicated by the solid line (FIG. 1). In the event of an offset frontal collision, if the seat back 3 rotates toward the front of the vehicle so as to stand upright due to inertia, as indicated by the two-dot chain line in FIG. 30 is displaced so that the height increases. Due to this displacement, the shoulder belt 11 is pressed against the inclined surface 351 . Therefore, the shoulder belt 11 tends to be relatively displaced below the inclined surface 351 . At that time, the shoulder belt 11 slides on the inclined surface 351 from the one end portion 31 side toward the other end portion 32 side, as indicated by the two-dot chain line in FIG. A solid arrow in FIG. 1 indicates the sliding direction of the shoulder belt 11 . Therefore, the clavicle and shoulders of the occupant 100 do not come off from the shoulder belt 11, and the shoulder belt 11 keeps the clavicle and shoulders of the occupant 100 appropriately restrained.

[Effect]
As described above, the seat 1 of this embodiment allows the shoulder belt 11 to slide on the inclined surface 351 from the one end 31 side toward the other end 32 side during a vehicle collision, particularly during an offset frontal collision. . That is, the inclined surface 351 allows the shoulder belt 11 to be shifted toward the occupant 100 side. Therefore, it is possible to prevent the clavicle and shoulders of the occupant 100 from slipping out of the shoulder belt 11 . Further, as described above, the seat 1 of this embodiment has a simple and inexpensive configuration in which the seat back 3, which inclines rearward during normal use, has the inclined surface 351, thereby preventing the clavicle and shoulders of the occupant 100 from coming off the shoulder belt 11. Since it can be suppressed, it is difficult to cause an increase in cost, an increase in weight, and a decrease in productivity.

The present invention is not limited to these examples, but is indicated by the scope of the claims, and is intended to include all modifications within the meaning and scope of equivalents of the scope of the claims.

The inclined surface may be provided on the upper end portion other than the one end portion. For example, an inclined surface may also be provided at the other end. The inclined surface of the other end is inclined downward from the other end toward the one end. By doing so, the upper end portion of the seatback becomes bilaterally symmetrical, so that the design of the seatback is not spoiled. Also, the inclined surface may be provided continuously from one end of the upper end to the center, or may be provided continuously from one end to the other end of the upper end.

The seat may be, for example, the driver's seat, the passenger's seat, or the right rear seat of a right-hand drive vehicle. In the case of the front passenger's seat, one end portion of the upper end portion of the seat back provided with the inclined surface is the outer side in the vehicle width direction, that is, the left side of the seat back, as in the above-described embodiment. In the case of the driver's seat or the right rear seat, one end of the upper end portion of the seat back provided with the inclined surface is the outer side in the vehicle width direction, that is, the right side of the seat back. Of course, the vehicle is not limited to a right-hand drive vehicle, and may be a left-hand drive vehicle.

REFERENCE SIGNS LIST 1 seat 3 seat back 30 upper end 31 one end 32 other end 35 projection 351 inclined surface 4 headrest 10 seat belt 11 shoulder belt 100 occupant

Claims (1)

A seat having a seat back that tilts toward the rear of the vehicle during normal use of the vehicle,
The upper end of the seat back is
one end where the seat belt is stretched;
the other end where the seat belt is not stretched;
and an inclined surface provided at the one end,
The inclined surface is a surface that descends downward from the one end side toward the other end side,
The position where the inclined surface is formed is a position where the seat belt is always in contact with the seat belt during use ,
the lower end of the inclined surface is connected to the upper surface of the seat back;
sheet.

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