JP6909760B2 - Crew restraint device - Google Patents

Description

The present invention relates to an occupant restraint device that restrains an occupant seated in a vehicle seat.

Airbag devices are almost standard equipment on recent vehicles. The airbag device is a safety device that operates in an emergency such as a vehicle collision, and expands and deploys with gas pressure to receive and protect occupants. There are various types of airbag devices depending on the installation location and application. For example, in the occupant restraint device of Patent Document 1, side airbags that expand and deploy to the immediate side of the occupant are provided on both sides of the seat.

Japanese Unexamined Patent Publication No. 2011-194936

When airbags (side airbags) are provided on both sides of the occupant, one airbag is a near-side airbag that expands and expands between the door or the side wall of the vehicle body and the occupant. The other airbag is a far-side airbag that expands and expands on the opposite side. Of these, the near-side airbag has a high internal pressure because the door acts as a reaction surface in the event of a collision. Then, the binding force of the airbag on the near side becomes high, and there is a possibility that an excessive load is applied to the occupant's torso.

In view of such a problem, an object of the present invention is to provide a occupant restraint device capable of reducing a load on a body portion on the near side side of an occupant.

In order to solve the above problems, a typical configuration of the occupant restraint device according to the present invention is a occupant restraint device that restrains an occupant seated in a seat of a vehicle, and the occupant restraint device is inside the seat back of the seat. It is equipped with a pair of airbags that are stored in the seat and expand and expand on both sides of the occupant seated in the seat, and a seat belt that is diagonally hung on the occupant's body and restrains the body. , Is connected to the far side area of the upper surface of the seat back, and the lower part of the seat belt is connected to the near side area of the upper surface of the seat cushion of the seat or the near side side of the seat cushion. It is characterized by that.

In the above configuration, each of the pair of airbags expands and expands to the near side side and the far side side. At this time, since the upper portion of the seat bell is connected to the far-side side region of the upper surface of the seat bag, the occupant's torso, particularly the chest, is restrained by the seat belt on the far-side side. Therefore, the binding force on the near side side of the occupant's torso is lower than when the upper part of the seat belt is connected to the area on the far side side of the upper surface of the seat bag. This makes it possible to reduce the load on the torso on the near side of the occupant.

The occupant restraint device includes a pair of tension cloths that are stored from the inside of the seat back of the seat to the inside of the seat cushion through the side opposite to the occupant of each of the pair of airbags stored, and the pair of tension cloths. It is preferable that the airbag is expanded to the side of the seat and stretched from the seat back to the seat cushion to hold the surface of the airbag opposite to the occupant.

According to such a configuration, a pair of airbags expanded and deployed on both sides of the occupant are urged against the occupant by a tension cloth provided for each airbag. This makes it possible to regulate the movement of the airbag away from the occupant. Therefore, it is possible to restrain the occupant more reliably.

The pair of tension cloths may be deployed on the sides of the seat by cleaving the skin of the seat. Alternatively, the occupant restraint device may be provided on the side of the seat and includes a case for accommodating an airbag and a pair of tension cloths, and the pair of tension cloths may be deployed from the case to the side of the seat. With either configuration, the above-mentioned effects can be obtained satisfactorily.

In the area on the far side of the upper surface of the seat bag, the portion to which the upper portion of the seat belt is connected may be located on the far side side of the portion to which the tension cloth is connected. This makes it possible to prevent the seat belt from hindering the deployment of the tension cloth.

Of the pair of airbags, the capacity of the airbag on the near side side is preferably smaller than the capacity of the airbag on the far side side. As a result, the airbag on the near side is less binding than the airbag on the far side. Therefore, it is possible to reduce the load on the torso on the near side of the occupant.

According to the present invention, it is possible to provide an occupant restraint device capable of reducing the load on the torso on the near side of the occupant.

It is a figure which illustrates the occupant restraint device which concerns on this embodiment. It is a figure which illustrates the state which observed the occupant seated in the seat of FIG. 1 from the side. It is a figure explaining the posture of the occupant when the airbag is expanded and expanded in this embodiment of FIG. 2 and when the airbag is expanded and expanded in the comparative example.

Preferred embodiments of the present invention will be described in detail below with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in such an embodiment are merely examples for facilitating the understanding of the invention, and do not limit the present invention unless otherwise specified. In the present specification and drawings, elements having substantially the same function and configuration are designated by the same reference numerals to omit duplicate description, and elements not directly related to the present invention are not shown. do.

In the present embodiment, when the occupant sits in the seat in a normal posture, the direction in which the occupant is facing is referred to as the front, and the opposite direction is referred to as the rear. When the occupant sits in the seat in a normal posture, the right side of the occupant is referred to as the right direction and the left side of the occupant is referred to as the left direction. Further, when the occupant is seated in a normal posture, the direction of the occupant's head is referred to as upward, and the direction of the occupant's waist is referred to as downward. Then, in the drawings used in the following description, if necessary, the front-back, left-right, up-down directions based on the above-mentioned occupant are referred to as Fr, Rr, L, R, Up, and Down.

FIG. 1 is a diagram illustrating the occupant restraint device 100 according to the present embodiment. For ease of understanding, in FIG. 1, the members housed inside the seat 110 are shown by virtual lines. Further, FIG. 1 illustrates a seat 110 when the airbags 120a and 120b are inflated and deployed. In the following description, it is assumed that the right direction is the near side side and the left direction is the far side side.

The occupant restraint device 100 of the present embodiment is a device for restraining an occupant seated in the seat 110. The seat 110 includes a seat back 112 that supports the upper body of the occupant. A seat cushion 114 on which an occupant sits is provided below the seat back 112. A headrest 116 that supports the occupant's head is provided above the seat back 112.

As illustrated in FIG. 1, the occupant restraint device 100 of the present embodiment includes a pair of airbags 120a and 120b and a seatbelt 140. The airbags 120a and 120b (side airbags) are housed inside the left and right sides of the seat back 112 of the seat 110, respectively, as illustrated in FIG. The airbags 120a and 120b expand and expand to both sides of the occupant seated in the seat 110 in the event of a vehicle collision or the like.

FIG. 2 is a diagram illustrating a state in which the occupant P seated in the seat 110 of FIG. 1 is observed from the side, and particularly illustrates a state in which the occupant P is observed from the near side. The seat belt 140 illustrated in FIGS. 1 and 2 is a so-called shoulder belt that is obliquely hung on the body portion P1 of the occupant P and restrains the body portion. Although not shown, the present embodiment may be applied to a three-point seat belt including a waist belt.

As a feature of this embodiment, the upper portion of the seat belt 140 is connected to a region on the far side side of the upper surface 112a of the seat back 112 as illustrated in FIG. As illustrated in FIG. 2, the lower portion of the seat belt 140 is connected to the side surface 114a on the near side of the seat cushion 114 of the seat 110 via the belt buckle 142.

FIG. 3 is a diagram for explaining the posture of the occupant when the airbags 120a and 120b are expanded and deployed in the present embodiment of FIG. 2 and when the airbag is expanded and deployed in the comparative example. FIG. 3A is the occupant restraint device 100 of the present embodiment, and FIG. 3B is the occupant restraint device 10 of the comparative example. The components common to the occupant restraint device 100 of the present embodiment and the occupant restraint device 10 of the comparative example are designated by the same reference numerals, and the description thereof will be omitted.

In the occupant restraint device 10 of the comparative example shown in FIG. 3B, the upper portion of the seat belt 14 is connected to the near side region of the upper surface 112a of the seat back 112. The lower portion of the seat belt 14 is connected to the far side side surface 114b (see FIG. 1) of the seat cushion 114 of the seat 110. That is, in the occupant restraint device 10 of the comparative example illustrated in FIG. 3B, the seat belt 14 is hung from the near side side with respect to the body portion P1 of the occupant P.

When the pair of airbags 120a and 120b expands and deploys to the side of the occupant, the vehicle body 102 acts as a reaction surface with respect to the airbag 120b on the near side at the time of a collision. Therefore, the internal pressure of the airbag 120b on the near side side and the binding force of the airbag 120b on the near side side become high.

At this time, when the seatbelt 14 is hung from the near side to the body P1 of the occupant P as illustrated in FIG. 3B, the body of the occupant P, particularly the chest, has a high binding force. It will be restrained by the seat belt 14 in addition to the airbag 120b on the near side. For this reason, a force in the rotational direction is applied to the body of the occupant P, and there is a possibility that an excessive load is particularly applied to the chest.

In contrast to the occupant restraint device 10 of the comparative example, in the occupant restraint device 100 according to the present embodiment, the upper portion of the seat belt 140 is located in the far side region of the upper surface 112a of the seat back 112 as illustrated in FIG. Be connected. Then, as illustrated in FIG. 2, the lower portion of the seat belt 140 is connected to the side surface 114a on the near side of the seat cushion 114 of the seat 110 via the belt buckle 142. That is, in the occupant restraint device 100 of the present embodiment illustrated in FIG. 3A, the seat belt 140 is hung from the far side side with respect to the body portion P1 of the occupant P.

According to the above configuration, of the body P1 of the occupant P, particularly the chest is restrained by the seat belt 140 on the far side side. Therefore, the torso P1 on the near side of the occupant P is mainly restrained by the airbag 120b on the near side. As a result, the binding force on the near side side of the body portion P1 of the occupant P is lower than that when the upper portion of the seat belt 14 is connected to the region on the far side side of the upper surface 112a of the seat back 112. As a result, it is possible to reduce the load on the body portion P1 on the near side of the occupant P.

Further, as illustrated in FIGS. 1 and 3A, the occupant restraint device 100 of the present embodiment further includes a pair of tension cloths 130a and 130b. In this embodiment, the pair of tension cloths 130a and 130b are provided for the airbags 120a and 120b, respectively. The tension cloths 130a and 130b are stored from the inside of the seat back 112 of the seat 110 to the inside of the seat cushion 114 through the side opposite to the occupant of each of the pair of stored airbags 120a and 120b.

As illustrated in FIG. 3A, when the airbags 120a and 120b expand and deploy, the tension cloths 130a and 130b expand to the side of the seat 110 by cleaving the skin of the seat 110. As a result, the tension cloths 130a and 130b are stretched from the seat back 112 to the seat cushion 114, and the surfaces of the airbags 120a and 120b opposite to the occupant P are held by the tension cloths 130a and 130b. Then, the airbags 120a and 120b are urged against the occupant P by the tension cloths 130a and 130b, so that the occupant restraint performance of the airbags 120a and 120b can be improved.

Further, in the present embodiment, as illustrated in FIG. 3A, the tension cloth 130a is connected to the portion where the upper part of the seatbelt 140 is connected in the region on the far side side of the upper surface 112a of the seatback 112. It is located on the far side side of the place where it is. Therefore, the deployment of the tension cloth 130a is not hindered by the seat belt 140.

Further, among the pair of airbags 120a and 120b, the capacity of the airbag 120b on the near side side may be set smaller than the capacity of the airbag 120a on the far side side. As a result, the near-side airbag 120b has a lower binding force than the far-side airbag 120a. Therefore, it is possible to more reliably reduce the load on the body portion P1 on the near side of the occupant P.

Note that FIG. 2 illustrates a configuration in which the tension cloth 130b expands from the upper surface of the seat cushion 114 to the outside of the seat 110, but the present invention is not limited to this. For example, the same effect can be obtained by deploying the tension cloth 130b from the side surface of the seat cushion 114 or the vicinity of the boundary between the side surface and the upper surface to the outside of the seat 110.

FIG. 4 is a diagram illustrating another example of the occupant restraint device of the present embodiment. The occupant restraint device 200 illustrated in FIG. 4 includes a case 118a and a case 118b arranged on the side of the seat. The case 118a illustrated in FIG. 4 is a case for accommodating airbags 120a and 120b, and the case 118b is a case for accommodating tension cloths 130a and 130b. In the occupant restraint device 200 illustrated in FIG. 4, the tension cloths 130a and 130b are deployed from the case 118b to the side of the seat 110 when the airbags 120a and 120b are expanded and deployed. Even with such a configuration, the same effect as that of the occupant restraint device 100 described above can be obtained.

In the present embodiment, the configuration in which the lower portion of the seat belt 140 is connected to the side surface 114a on the near side of the seat cushion 114 is illustrated, but the present invention is not limited to this. For example, the same effect can be obtained in a configuration in which the lower portion of the seat belt 140 is connected to a region on the near side side of the upper surface of the seat cushion 114 of the seat 110.

Further, in the present embodiment, the seat belt 140 connected to the seat 110, that is, the configuration in which the seat 110 is a belt-in seat is illustrated. However, the configuration is not limited to this, and in addition to the seat belt 140 connected to the seat 110 as in the present embodiment, the configuration is further provided with a seat belt extended from the vehicle body 102 (pillar) on the near side. Is also possible.

Although preferred embodiments of the present invention have been described above with reference to the accompanying drawings, the embodiments described above are preferred examples of the present invention, and other embodiments may also be implemented by various methods. Can be carried out. Unless otherwise specified in the specification of the present application, the present invention is not limited to the shape, size, configuration arrangement, etc. of the detailed parts shown in the accompanying drawings. In addition, the expressions and terms used in the specification of the present application are for the purpose of explanation and are not limited thereto unless otherwise specified.

Therefore, it is clear that a person skilled in the art can come up with various modifications or modifications within the scope of the claims, which naturally belong to the technical scope of the present invention. It is understood as a thing.

The present invention can be used as a occupant restraint device for restraining an occupant seated in a vehicle seat.

P1 ... Body, 10 ... Passenger restraint device, 14 ... Seat belt, 100 ... Crew restraint device, 102 ... Body, 110 ... Seat, 112 ... Seat back, 112a ... Top surface, 114 ... Seat cushion, 114a ... Side surface, 114b ... Side, 116 ... headrest, 118a ... case, 118b ... case, 120a ... airbag, 120b ... airbag, 130a ... tension cloth, 130b ... tension cloth, 140 ... seat belt, 142 ... belt buckle, 200 ... occupant restraint device, P ... Crew

Claims (4)

An occupant restraint device that restrains an occupant seated in a vehicle seat .
A pair of airbags that are housed in the seat back of the seat and expand and expand on both sides of the occupant seated in the seat.
A seatbelt that is diagonally hung on the torso of the occupant and restrains the torso ,
The pair of stored airbags are provided with a pair of tension cloths that are stored from the inside of the seat back of the seat to the inside of the seat cushion through the side opposite to the occupant of each of the stored airbags.
The upper portion of the seat belt is connected to a region on the far side side of the upper surface of the seat back.
The lower portion of the seat belt is connected to a region on the near side side of the upper surface of the seat cushion of the seat or a side surface on the near side side of the seat cushion .
The pair of tension cloths are expanded to the side of the seat by the expansion and deployment of the airbag, and are stretched from the seat back to the seat cushion to hold the surface of the airbag opposite to the occupant. ,
In the area on the far side side of the upper surface of the seat bag, the portion to which the upper portion of the seat belt is connected is located on the far side side with respect to the portion to which the tension cloth is connected. Device. The occupant restraint device according to claim 1 , wherein the pair of tension cloths are deployed on the side portion of the seat by cleaving the skin of the seat. It is provided with a case arranged on the side of the seat and accommodating the airbag and the pair of tension cloths.
The occupant restraint device according to claim 1 , wherein the pair of tension cloths are deployed from the case to the side portion of the seat. The occupant restraint device according to any one of claims 1 to 3 , wherein the capacity of the airbag on the near side side of the pair of airbags is smaller than the capacity of the airbag on the far side side.

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