Airbag device
阅读说明:本技术 安全气囊装置 (Airbag device ) 是由 中岛豊 石垣良太 伊藤圭希 于 2019-03-08 设计创作,主要内容包括:本发明的目的在于提供一种可以在紧急情况下有效抑制乘员伤害值的安全气囊装置。本发明所涉及的安全气囊装置(100)的代表性的结构为,具备:充气器(118),其设置于车辆上并可供给气体;内袋(112),其利用气体在车辆座椅前方膨胀;外袋(110),其通过充气器(118)或经由内袋(112)被供给气体并包围内袋(112)而膨胀。并且其特征在于,外袋(110)具有使内袋(112)朝向座椅(104)露出的开口部(116),内袋(112)形成为车辆前后方向的长度比车宽方向的长度更长的形状,内袋(112)还具有向座椅侧以凸面从开口部(116)露出的约束部(114)。(The invention aims to provide an airbag device which can effectively restrain the injury value of an occupant in an emergency. A typical structure of an airbag device (100) according to the present invention includes: an inflator (118) that is provided on the vehicle and that can supply gas; an inner bag (112) that is inflated with gas in front of the vehicle seat; an outer bag (110) which is inflated by being supplied with gas by an inflator (118) or via an inner bag (112) and surrounding the inner bag (112). The outer bag (110) has an opening (116) for exposing the inner bag (112) to the seat (104), the inner bag (112) is formed in a shape in which the length in the vehicle front-rear direction is longer than the length in the vehicle width direction, and the inner bag (112) further has a restraining section (114) exposed from the opening (116) in a convex manner toward the seat side.)
1. An airbag device is characterized by comprising:
an inflator provided in a vehicle and capable of supplying gas;
an inner bag that is inflated with the gas in front of the vehicle seat;
an outer bag inflated by the inflator or supplied with the gas via the inner bag and surrounding the inner bag,
the outer bag has an opening portion for exposing the inner bag toward the seat,
the inner bag is shaped such that the length in the vehicle front-rear direction is longer than the length in the vehicle width direction,
the inner bag further includes a restraint portion exposed from the opening portion in a convex surface toward the seat side.
2. The airbag device according to claim 1,
the opening portion of the outer bag is crimped by a predetermined inflation portion of the outer bag on the seat side of the outer bag,
the predetermined expansion portion includes:
an upper expansion part forming an upper edge of the opening part;
a lower expansion part forming a lower edge of the opening part;
a left side expansion part forming a left edge of the opening part;
a right side expanded portion forming a right edge of the opening portion.
3. The airbag device according to claim 2,
the upper inflatable portion may restrain a portion of the forehead to the upper portion of the occupant normally seated in the seat.
4. The airbag device according to claim 2 or 3,
the lower inflation portion can restrain a chest portion of an occupant normally seated on the seat.
5. The airbag device according to any one of claims 2 to 4,
the left and right inflatable portions may restrain shoulders and a side head of an occupant normally seated in the seat.
6. The airbag device according to any one of claims 2 to 5,
the outer bag has a size capable of restraining the upper body of the occupant in a range from an outermost portion of the left inflatable portion to an outermost portion of the right inflatable portion in the vehicle width direction,
the opening has a dimension in the vehicle width direction capable of accommodating the head portion of the upper body.
7. The airbag device according to any one of claims 3 to 6,
the occupants are adult males and adult females above average physique.
8. The airbag device according to any one of claims 1 to 7,
the tension of the base fabric of the constraining portion constituting the inner bag is lower than that of the base fabric of the outer bag.
9. The airbag device according to any one of claims 1 to 8,
the opening has a dimension in the vehicle width direction that is wider than a head width of the occupant and narrower than a shoulder width of the occupant.
10. The airbag device according to any one of claims 1 to 9,
the opening has a dimension in the vehicle width direction smaller than a maximum dimension of the inner bag in the vehicle width direction.
11. The airbag device according to any one of claims 1 to 10,
the opening is provided in a central region obtained by trisecting the outer bag in the vehicle width direction.
12. The airbag device according to any one of claims 1 to 11,
the opening has edges on both sides in the vehicle width direction that draw a convex curve toward the other edge when viewed from the rear of the vehicle.
Technical Field
The present invention relates to an airbag device for restraining an occupant in an emergency.
Background
Vehicles of recent years are basically equipped with an airbag device. An airbag device is a safety device that operates in an emergency such as a vehicle collision, and uses gas pressure to inflate and expand an airbag cushion, thereby catching and protecting an occupant. The airbag device is variously classified according to the installation position and the use. For example, a front airbag device is provided at the center of a steering wheel of a driver's seat, and a passenger airbag is provided in an instrument panel and a peripheral portion thereof near a front passenger seat, mainly for protecting an occupant of a front seat in a front-rear collision. In order to protect the front and rear occupants from side collision and subsequent rollover (rollover), curtain airbags that inflate and deploy along side windows are provided near the ceiling of the wall portion, and side airbags that inflate and deploy only to the sides of the occupants are provided at the side portions of the seat.
An airbag cushion of each airbag device has an interior divided into a plurality of spaces according to purposes and installation environments. For example, in an occupant protection device (front airbag) described in patent document 1, an airbag cushion is configured to include a central gas bag 1 at the center and a peripheral gas bag 3 around the central gas bag. According to the structure of patent document 1, the restraint surface for restraining the occupant is flat and enlarged, and has a wide area, so that the occupant can be reliably received.
Disclosure of Invention
At present, it is required for an airbag device to take measures against irregular collision and impact, for example, so-called oblique collision in which an impact from an oblique front-rear direction is applied to a vehicle. An occupant in an oblique collision enters an airbag cushion present in the front of a seat at an irregular angle such as an oblique direction. In this case, when the head of the occupant contacts the airbag cushion on the front surface of the seat, the head may rotate about the head as viewed from above. Such rotation of the head is likely to cause an increase in the injury value of the occupant in terms of human body structure, and therefore it is necessary to effectively prevent such a situation.
Problems to be solved by the invention
The present invention has been made in view of the above problems, and an object thereof is to provide an airbag device capable of effectively suppressing the injury value of an occupant in an emergency.
Means for solving the problems
To solve the above problem, a typical structure of an airbag device according to the present invention includes: an inflator provided in a vehicle and capable of supplying gas; an inner bag that is inflated with gas in front of the vehicle seat; the outer bag is provided with an opening portion for exposing the inner bag to the seat, the inner bag is formed in a shape having a length in the vehicle front-rear direction longer than a length in the vehicle width direction, and the inner bag further has a restraining portion exposed from the opening portion in a convex shape toward the seat side.
The airbag cushion of this airbag device, i.e., the inner bag and the outer bag, are inflated by gas pressure from the same inflator, and the internal pressures of each become equal. However, when the base fabrics of the inner bag and the outer bag are curved, the outer shape of the inner bag is smaller than that of the outer bag, and therefore the inner bag has a smaller radius of curvature than the outer bag at any position of the two positions. The inner bag is long in the vehicle front-rear direction, and a restraining portion at the rear end of the seat side, i.e., the vehicle rear side, is formed in a convex shape. That is, the constraining portion also becomes a portion having a small radius of curvature in the entire region of the inner bag. Therefore, the tether is a portion of the airbag cushion where the tension is particularly low, and the rigidity is also low. In the case of the restraint portion, the occupant can be more softly received, and for example, the rotation of the head portion can be absorbed, so that the injury value of the occupant can be further suppressed.
The opening portion of the outer bag is bordered on the seat side of the outer bag by a predetermined inflation portion of the outer bag, and the predetermined inflation portion may include: an upper expansion part forming an upper edge of the opening part; a lower expansion part forming a lower edge of the opening part; a left side expansion part forming a left edge of the opening part; and a right side expanded portion forming a right edge of the opening portion. If the inflation portion of the outer bag is configured to continuously enclose the exposed inner bag, the occupant can be restrained by the inflation portion of the outer bag together with the inner bag.
The upper inflatable portion may restrain a portion of the forehead of the occupant seated normally in the seat to the upper portion. With this configuration, the occupant can be appropriately protected.
The lower inflatable portion described above may restrain the chest of an occupant seated properly on the seat. With this configuration, the occupant can be appropriately protected.
The left and right inflatable portions described above may restrain the shoulders and the side heads of the occupant normally seated in the seat. With this configuration, the occupant can be appropriately protected.
In the above-described outer bag, the range from the outermost portion of the left inflatable portion to the outermost portion of the right inflatable portion in the vehicle width direction may have a size capable of restraining the upper body of the occupant, and the opening portion may have a size capable of accommodating the head portion of the upper body in the vehicle width direction. According to this configuration, the head of the occupant can be restrained softly with low rigidity by the restraining portion of the inner bag, and the strong and heavy shoulder and chest portions of the body of the occupant can be restrained sufficiently with high rigidity by the outer bag.
The above-mentioned occupants may be adult males and adult females of more than average physique. If the person has such a specific constitution, the person can be sufficiently restrained by the inner bag and the outer bag.
The base fabric constituting the constraining portion of the inner bag has a lower tension than the base fabric constituting the outer bag. According to this structure, the occupant can be received more softly.
In the airbag device, a dimension of the opening in the vehicle width direction may be larger than a head width of the occupant and smaller than a shoulder width of the occupant. According to this configuration, the head of the occupant can be restrained softly with low rigidity by the restraining portion, and the strong and heavy shoulder and chest and the like in the body of the occupant can be restrained sufficiently with high rigidity by the outer bag.
The size of the opening in the vehicle width direction of the airbag device may be smaller than the maximum size of the inner bag in the vehicle width direction. According to this configuration, the portion of the inner bag having the largest dimension in the vehicle width direction is surrounded by the outer bag, and only the restraining portion as the rear end is exposed from the opening portion. Therefore, even if the inner bag receives a load of the occupant, the occupant can be restrained without breaking the posture.
The opening may be provided in a central region obtained by trisecting the outer bag in the vehicle width direction. According to this configuration, the head of the occupant can be restrained by the central restraining portion, and the shoulder, the chest, and the like of the occupant can be restrained by the outer bag.
The edges on both sides of the opening in the vehicle width direction may draw a convex curve toward the other edge when viewed from the rear of the vehicle. In the case of the opening, the opening is less likely to expand in the vehicle width direction, and therefore the restraining portion of the inner bag can be completely surrounded and supported.
Effects of the invention
According to the present invention, it is possible to provide an airbag device that can effectively suppress the injury value of an occupant in an emergency.
Drawings
Fig. 1 is a diagram illustrating an outline of an airbag device according to an embodiment of the present invention.
Fig. 2 is a view illustrating the airbag cushion in fig. 1(b) when inflated and deployed, as viewed from various directions.
Fig. 3 is a B-B sectional view of the airbag cushion of fig. 1 (B).
Fig. 4 is a view illustrating the airbag cushion of fig. 3 from another direction.
Fig. 5 is a diagram illustrating a first modification of the airbag cushion illustrated in fig. 1(b) and the like.
Fig. 6 is a diagram illustrating a second modification of the airbag cushion illustrated in fig. 1(b) and the like.
Detailed Description
Preferred embodiments of the present invention will be described in detail with reference to the following drawings. Dimensions, materials, other specific numerical values, and the like shown in the embodiments are merely examples for facilitating understanding of the present invention, and do not limit the present invention unless otherwise specified. In the present specification and the drawings, elements having substantially the same function and configuration are denoted by the same reference numerals, and overlapping description thereof is omitted, and elements not directly related to the present invention are omitted from illustration.
(embodiment I)
Fig. 1 is a diagram illustrating an outline of an airbag device 100 according to an embodiment of the present invention. Fig. 1(a) is a diagram illustrating a vehicle before the airbag device 100 is operated. In the other drawings in fig. 1(a), the vehicle front-rear direction is illustrated by arrows f (forward), b (back), the vehicle width direction left-right direction by arrows l (left), r (right), and the vehicle vertical direction by arrows u (up), d (down).
In the present embodiment, the airbag device 100 will be described as a passenger airbag for a front passenger seat (a front right seat 104) in a left-hand barring. Hereinafter, the description will be given assuming the front right seat 104, and thus, for example, the vehicle outside in the vehicle width direction means the vehicle right side, and the vehicle inside in the vehicle width direction means the vehicle left side.
The airbag cushion of the airbag device 100 is hereinafter referred to as an airbag cushion 108 (see fig. 1(b)) which is housed in a housing portion 106 provided on an instrument panel 102. the housing portion 106 is provided in the vehicle front of the seat 104, and houses an inflator 118 as a gas generating device in addition to the airbag cushion 108, see fig. 2 (a).
Fig. 1(b) is a diagram illustrating a vehicle after the airbag device 100 of fig. 1(a) is operated. The airbag cushion 108 is a bag-shaped cushion formed by overlapping a plurality of base cloths constituting a surface thereof and sewing or bonding the base cloths, or by weaving using OPW (One-Piece woven), or the like.
The airbag cushion 108 in the present embodiment is roughly divided into two portions, namely, an
Fig. 2 is a view illustrating the airbag cushion 108 in fig. 1(b) at the time of inflation and deployment, from various directions. Fig. 2(a) is a sectional view a-a of the airbag cushion 108 of fig. 1 (b). As illustrated in fig. 2(a), the
A part of the inflator 118 is inserted into the
The inflator 118 is a disk type (disk type), and is partially inserted into the
An inner vent 122 as a gas passage is provided in the
The
The restraining
In the present embodiment, in order to effectively suppress the injury value of the occupant 124 (see fig. 4(b) and the like) in an emergency, the base fabric constituting the restraining
The
The length of the
The constraining
In the airbag device 100, the dimension W1 in the vehicle width direction of the opening 116 is smaller than the maximum dimension W2 in the vehicle width direction of the
Fig. 2(b) is a front view of the airbag cushion 108 of fig. 2(a) from the rear side (lower side in fig. 2 (a)) of the vehicle. As illustrated in fig. 2(b), the opening 116 is slightly longer in the vehicle vertical direction. Although the opening 116 illustrated in fig. 2(b) is formed in a rounded rectangular shape, the shape of the opening 116 is not limited, and, for example, an opening having a shape close to a circle may be used.
The opening 116 is provided in a central region E2 of three regions E1 to E3 that trisect the
The opening 116 is bordered by a predetermined inflated portion of the
Here, a figure assumed by the occupant 124 (see fig. 3) who illustrates the head 126 in fig. 2b will be described. The occupant 124 is exemplified as including any one of the AM50 dummy and the AM95 dummy of hybrid iii (hybrid iii) and the Thor dummy as a manikin for a frontal crash test of an automobile. The AM50 dummy was a model of an average size American adult male, simulating a human model of 175cm in height, 88cm in sitting height, and about 78kg in weight. The AM95 dummy is a American adult male with a large stature and simulates a human body model of a person with the height of 183cm, the sitting height of 94cm and the weight of about 101 kg. The Thor dummy is a human model developed as a successor to the hybrid iii dummy, and is modeled only by average-size men. These mannequins were made according to the standards of NHTSA (national highway Safety Administration).
The inflation portion of the outer bag 110 (see fig. 2(b)) of the present embodiment can restrain the occupant 124 (see fig. 3 and the like) together with the
In the case of the
Fig. 3 is a B-B sectional view of the airbag cushion 108 in fig. 1 (B). Fig. 3 also schematically illustrates the airbag cushion 108 and the like, and does not limit the size relationship and the positional relationship of the airbag cushion 108 and the occupant 124.
As described above, the
The airbag cushion 108 inflates and deploys filling the space between the occupant 124 of the seat 104 and the instrument panel 102 and windshield 120. This prevents the occupant 124 from colliding with the instrument panel 102 and the like. Further, while preventing the occupant from colliding with the windshield 120, the occupant 124 is also prevented from popping out to the outside of the vehicle.
Here, fig. 3 illustrates a dummy figure as an example of the occupant 124. When the size of the airbag device 100 is defined with reference to the body of the occupant 124, for example, the size may be determined with reference to AM95 of a dummy figure, in which AM95 corresponds to 95% of American male adults (American male) with a high physique and 95% of people with a small physique.
Fig. 4 is a diagram illustrating the airbag cushion 108 of fig. 3 from another direction. Fig. 4(a) is a view corresponding to a section C-C of the airbag cushion 108 of fig. 3.
In the present embodiment, the
Fig. 4(b) is a diagram illustrating a situation in which the airbag cushion 108 of fig. 4(a) restrains the occupant 124. Here, a phenomenon when oblique collision is assumed is exemplified. When a collision occurs in a diagonal direction, the occupant 124 enters the airbag cushion 108 with a slight inclination.
As described above, the binding
The
Here, assuming that only one set of airbag cushion exists in front of the occupant 124, when the head 126 of the occupant 124 moving obliquely contacts the airbag cushion, a difference occurs in movement between the head 126 and the shoulder 128 due to friction between the head 126 and the airbag cushion, and a clockwise rotational force about the neck, that is, a rotational force about the cervical vertebrae as an axis, may be generated in the head 126 with respect to the shoulders 128 or the like as viewed from above the vehicle. When such rotation of the head 126 occurs, the injury value of the occupant 124 tends to rise.
Therefore, in the present embodiment, the head 126 of the occupant 124 is configured to be in contact with the restraining
According to the configurations of the present embodiment, not only in the case of an oblique collision but also in the case of a collision in the normal vehicle front-rear direction, it is possible to restrain a taller occupant and suppress the injury value and movement of the occupant 124.
In the above description, as an example of the rotation generated in the head 126, referring to fig. 4(b), the clockwise rotation is exemplified. However, in an emergency, for example, the occupant 124 may move diagonally forward in the vehicle interior, and the head 126 may rotate counterclockwise around the neck as viewed from above. With this counterclockwise rotation, the airbag cushion 108 according to the present embodiment can reduce or eliminate, and reduce the angular velocity of the head 126. That is, the airbag device 100 of the present embodiment can produce the same effect on the occupant 124 that moves in any vehicle width direction.
(first modification)
Fig. 5 is a diagram illustrating a first modification of the airbag cushion 108 illustrated in fig. 1(b) and the like. Hereinafter, the same components as those already described are denoted by the same reference numerals, and the description thereof is omitted. Note that, components having the same names as those of the components already described have the same functions unless otherwise explicitly described, even if different symbols are attached thereto.
In the airbag cushion 200 illustrated in fig. 5(a), the inner base fabric 206, which is a portion of the base fabric constituting the outer bag 202 that constitutes the inside of the opening 116, is inflated so as to protrude toward the seat 104 (see fig. 1 (b)). In particular, the inner base cloth 206 linearly expands along the vehicle vertical direction at the left and right sides of the opening portion 116 in the vehicle width direction.
Fig. 5(b) is a D-D sectional view of fig. 5 (a). The outer bag 202 is roughly divided into an outer base fabric 204 forming an outer surface and an inner base fabric 206 contacting the
Of the outer base cloth 204 and the inner base cloth 206 of the outer bag 202, the inner base cloth 206 existing on the inner side has a smaller radius of curvature than the outer base cloth 204 existing on the outer side when both base cloths are viewed as curved surfaces during inflation. Generally, the pressure and radius of curvature affect the tension of the substrate. Since the outer bag 202 inflates in accordance with the pressure of gas from one inflator 118, the tension of the inner base cloth 206 is lower than that of the outer base cloth 204 in accordance with the magnitude of the radius of curvature. Thus, the outer bag 202 of the present embodiment is configured such that the inner base cloth 206 having low tension protrudes.
Fig. 5(c) is a diagram illustrating a state in which the airbag cushion 200 in fig. 5(b) restrains the occupant 124. In the event of a collision at an angle, the occupant 124 is slightly inclined into the airbag cushion 200. The inner base cloth 206 expanded along the edge of the opening 116 is present slightly laterally offset in the vehicle width direction with respect to the front surface of the seat 104. Therefore, when the occupant 124 moves diagonally from the seat 104, the occupant 124 also contacts the inner base cloth 206. At this time, the inner base cloth 206 not only protrudes to the seat side (lower side in fig. 5(c)), but also is set to have a lower tension than the outer base cloth 204, so that the head 126 can be gently caught even in the vicinity of the side head.
In the airbag cushion 200, the
(second modification)
Fig. 6 is a diagram illustrating a second modification of the airbag cushion 108 illustrated in fig. 1(b) and the like. In the
While the preferred embodiments of the present invention have been described above with reference to the drawings, the above embodiments are preferred embodiments of the present invention, and other embodiments may be implemented or executed in various ways. Unless otherwise specified in the present specification, the present invention is not limited to the shapes, sizes, structural arrangements, and the like of the detailed components shown in the drawings. The terms and expressions used in the present specification are for illustrative purposes, and are not limited thereto unless otherwise specified.
Therefore, it will be apparent to those skilled in the art that various changes and modifications can be made within the scope of the claims and these are also understood to be within the technical scope of the present invention.
Industrial applicability of the invention
The present invention can be used for an airbag device that restrains an occupant in an emergency.
Description of the symbols
E1-E3 DEG A region trisecting the airbag cushion in the vehicle width direction
W1. the dimension of the opening in the vehicle width direction
W2. maximum dimension of inner bag in vehicle width direction
W3. the size of the outer bag in the vehicle width direction
100. airbag device 102. instrument panel
104. seat 106. accommodation part
107 cover 108 airbag cushion
108 a. upper expansion part 108 b. lower expansion part
108 c.left expansion part 108 d.Right expansion part
110.
114. bound portion 116. opening portion
118. inflator 120. windshield
122. inner vent 124. occupant
126. head 128. shoulder
130. chest 140. short female head
200 · the airbag cushion of the first modification
202. outer bag 204. outer base cloth
206.
222. the opening 222 a. the edge of the left side of the opening
222b · edge of the right side of the opening