JP6310568B2 - Airbag device - Google Patents

Description

  The present invention relates to an airbag device that is installed in a vehicle and inflated and deployed for the purpose of protecting an occupant in an emergency.

  The airbag device is a safety device that operates in an emergency such as a vehicle collision, and includes a bag-like cushion, for example. The cushion is inflated and deployed by gas in an emergency to receive and protect the occupant. There are various types of airbag devices depending on the installation location and application. As an example, a side airbag that inflates and deploys from the side of a vehicle seat to the side of the occupant is known in order to protect the occupant from side collision and subsequent rollover (rollover).

  The cushion of the airbag device is configured to inflate and deploy mainly by gas pressure, and is provided with a gas generator called an inflator as a gas supply source. There are various types of inflators depending on the type of air bag and its installation location. For example, a cylinder type (tubular type) inflator is mainly used for curtain airbags, side airbags, and the like.

  The entire inflator or a part of the inflator is inserted into an airbag (strictly, a cushion of the airbag). For example, Patent Literature 1 describes an airbag device including a side airbag and a cylinder-type inflator. The side airbag (cushion) is provided with an insertion hole for inserting an inflator and a check valve. The check valve is provided inside the cushion so as to cover the insertion hole, and has a pair of cloth pieces formed in a substantially trapezoidal shape.

  In the airbag apparatus described in Patent Document 1, when the inflator inserted through the insertion hole is operated inside the cushion, the upper ends of the pair of cloth pieces forming the check valve are separated from each other by the gas wind pressure. Allow supply. When the gas pressure becomes equal to or higher than a predetermined value, the check valve limits the movement of the gas because the upper end sides of the pair of cloth pieces approach each other.

JP 2012-131363 A

  In Patent Document 1, a check valve is formed by a pair of cloth pieces, but the pair of cloth pieces are merely separated or approached by gas pressure. Therefore, in the technique described in Patent Document 1, the check valve collapses due to a change in gas pressure when the inflator is activated, and there is a concern that gas leaks to the outside through an insertion hole formed in the cushion and into which the inflator is inserted. . In addition, since the pair of cloth pieces are provided inside the cushion so as to cover the insertion hole, it is difficult to insert the inflator into the insertion hole.

  In view of such a problem, the present invention provides an airbag device in which when an inflator is activated, gas is hardly leaked from an insertion hole formed in a cushion and into which the inflator is inserted, and further, the inflator can be easily inserted into the insertion hole. The purpose is to do.

  In order to solve the above problems, a representative configuration of an airbag apparatus according to the present invention is an airbag apparatus installed in a vehicle, which uses a cylinder-type inflator and a gas supplied from the inflator. A bag-shaped cushion that is inflated and deployed; an insertion hole formed in the cushion through which the inflator is inserted into the cushion; and a covering portion that covers the insertion hole. Has a pair of patches arranged so as to sandwich and contact the inflator inserted in the insertion hole, and each of the pair of patches includes a first side and a second side forming an obtuse angle on the side in contact with the inflator It is characterized by.

  According to the above configuration, the first side and the second side are in contact with the inflator while the pair of patches of the covering portion are in contact with the inflator. Therefore, since the pair of patches sandwich the inflator not only between the first sides but also between the second sides, the gap between the insertion hole and the inflator can be closed. For this reason, when the inflator is activated, gas hardly leaks to the outside of the cushion through the insertion hole.

  Moreover, when inserting an inflator into the inside of a cushion through the insertion hole of a cushion, an inflator can expand this, contacting the 1st side and 2nd side which make an obtuse angle, and can pass a pair of patch. Therefore, according to the said structure, the gas leak at the time of an inflator operation | movement can be reduced, and also an inflator can be easily inserted in an insertion hole.

  Said coating | coated part is good to be provided inside a cushion. Thus, since the insertion hole is covered from the inside of the cushion with the covering portion, the sealing performance is improved, and when the inflator is activated and the cushion is deployed, gas is less likely to leak to the outside of the cushion through the insertion hole.

  Said coating | coated part is good to be provided in the outer side of a cushion. Thereby, a coating | coated part can be easily provided in a cushion. Moreover, sealing performance can also be ensured by appropriately ensuring the clearance between the first side and the second side of the pair of patches at the covering portion and the outer periphery of the inflator.

  The obtuse angle vertex of each of the pair of patches may be aligned. Thereby, since a pair of patch can be aligned with respect to an insertion hole, the gas leak at the time of an inflator operation | movement can be reduced more reliably, and an inflator can be easily inserted by an insertion hole.

  The first side and the second side may include a straight line or a curved line. Thereby, a 1st edge | side and a 2nd edge | side can be formed according to the external shape of an inflator. Therefore, the inflator becomes easier to contact with the first side and the second side, and gas leakage can be further reduced.

  The pair of patches may be sewn to the cushion by a sewing line that surrounds the insertion hole. Thereby, an insertion hole can be covered with a pair of patches.

  Said sewing line is good in circular or grid | lattice form. Since the inflator is cylindrical, if the sewing line is circular, a relatively uniform force can be applied to the entire sewing line when the inflator is inserted. If the sewing line has a lattice shape, not only it is easy to sew, but also there are places where the sewing is doubled, so that a pair of patches can be reliably provided inside the cushion.

  The insertion hole may be a slot that is long in one direction. Thereby, it is possible to easily insert the inflator through the insertion hole by matching the direction in which the inflator is inserted into the insertion hole with one direction of the slot.

  The pair of patches may be arranged in line symmetry with each other with the first sides as symmetry axes, and the first sides overlapped with each other due to being arranged in line symmetry may form a slit. Thereby, a covering part can be formed by arranging a pair of patches in line symmetry and forming a slit between the first sides. In this covering portion, since the first sides form a slit, the inflator can be more easily inserted through the slit.

  The pair of patches are arranged symmetrically with respect to each other so that at least a part of the first sides overlap with each other about a predetermined point on the first side of both patches, and at least one of the overlapping first sides It is preferable that the part is in a slit state. As a result, the covering portion can be formed such that the pair of patches are arranged point-symmetrically and at least a part of the first sides forms a slit. In this covering part, since at least a part of the first sides forms a slit, the length of the slit can be shortened compared to the case where the first sides form a slit. Therefore, when the inflator is inserted through the slit, the degree of adhesion between the inflator and the patch increases, the degree of sealing becomes high, and gas hardly leaks to the outside.

  Another representative configuration of the airbag apparatus according to the present invention is an airbag apparatus installed in a vehicle, which is a bag-shaped inflator that is inflated and deployed using a gas supplied from the inflator and a cylinder-type inflator. A cushion, an insertion hole formed in the cushion, and a slit-like insertion hole in which at least a part of the inflator is inserted into the cushion through the insertion hole, and a patch that covers the slit-like insertion hole, The insertion hole includes a first slit and a second slit that form an obtuse angle, and the patch is axisymmetric to the second slit with the first slit as a symmetry axis, the third slit overlapping the first slit, and the third slit And a fourth slit having an obtuse angle.

  According to the above configuration, the first slit and the second slit of the insertion hole and the third slit and the fourth slit of the patch are in contact with the inflator, with the slit-shaped insertion hole and the patch sandwiching the inflator. Therefore, the insertion hole and the patch sandwich the inflator not only with the first slit and the third slit but also with the second slit and the fourth slit. For this reason, according to the insertion hole and the patch, the gap between the insertion hole and the inflator can be closed. Therefore, when the inflator is activated, the gas hardly leaks to the outside of the cushion through the insertion hole. Further, since the insertion hole has a slit shape, only one patch is required, and the structure can be simplified. Furthermore, the patch also serves as a reinforcing cloth covering the slit-shaped insertion hole.

  Further, when the inflator is inserted into the cushion through the insertion hole of the cushion, the inflator presses the first slit and the second slit that form an obtuse angle and the third slit and the fourth slit that form the obtuse angle while touching the inflator. Can widen and pass through insertion holes and patches. Therefore, according to the above configuration, not only can gas leakage during operation of the inflator be reduced, but also the inflator can be easily inserted into the insertion hole.

  Another representative configuration of the airbag apparatus according to the present invention is an airbag apparatus installed in a vehicle, which is a bag-shaped inflator that is inflated and deployed using a gas supplied from the inflator and a cylinder-type inflator. A cushion, an insertion hole formed in the cushion, and a slit-like insertion hole in which at least a part of the inflator is inserted into the cushion through the insertion hole, and a patch that covers the slit-like insertion hole, The insertion hole includes a first slit and a second slit that form an obtuse angle, and the patch is line symmetric with respect to the second slit with the first slit as an axis of symmetry, the third side overlapping the first slit, And a fourth side forming an obtuse angle.

  According to the above configuration, the first slit and the second slit of the insertion hole and the third side and the fourth side of the patch are in contact with the inflator, with the slit-shaped insertion hole and the patch sandwiching the inflator. Therefore, the insertion hole and the patch sandwich the inflator not only with the first slit and the third side but also with the second slit and the fourth side. For this reason, according to the insertion hole and the patch, the gap between the insertion hole and the inflator can be closed. Therefore, when the inflator is activated, the gas hardly leaks to the outside of the cushion through the insertion hole. Furthermore, since the insertion hole has a slit shape, only one patch is required, and the structure can be simplified.

  In addition, when the inflator is inserted into the cushion through the insertion hole of the cushion, the inflator presses the first slit and the second slit that form an obtuse angle and the third side and the fourth side that form the obtuse angle while touching the inflator. Can widen and pass through insertion holes and patches. Therefore, according to the above configuration, not only can gas leakage during operation of the inflator be reduced, but also the inflator can be easily inserted into the insertion hole.

  Said patch is good to be provided inside a cushion. Thus, since the insertion hole is covered with the patch from the inside of the cushion, the sealing performance is enhanced, and when the inflator is activated and the cushion is deployed, the gas is less likely to leak to the outside of the cushion through the insertion hole.

  Said patch is good to be provided in the outer side of a cushion. Thereby, a patch can be easily provided in a cushion. In addition, when covering the insertion hole with the patch, the clearance between the third slit and the fourth slit and the outer periphery of the inflator, and the clearance between the third side and the fourth side and the outer periphery of the inflator are appropriately secured, thereby providing a seal. Can also be secured.

  The insertion hole is closed by a patch when the inflator is not inserted. As a result, since the insertion hole is closed by the patch in the natural state of the cushion, when the inflator is inserted, the gap between the inflator and the insertion hole is reduced, the degree of adhesion between the inflator and the patch is increased, and the degree of sealing is increased. The gas becomes higher and it is difficult for gas to leak outside.

  ADVANTAGE OF THE INVENTION According to this invention, when an inflator act | operates, it becomes possible to provide the airbag apparatus which gas hardly leaks outside from the insertion hole of a cushion, and is easy to insert an inflator into an insertion hole.

1 is a diagram schematically illustrating an airbag device according to a first embodiment of the present invention. It is a figure which illustrates a part of airbag apparatus of FIG. 1 in detail. It is a figure which illustrates the state before sewing of the cushion of FIG. It is a figure which illustrates the coating | coated part of FIG. It is a figure which illustrates the procedure which inserts an inflator in the coating | coated part of FIG. It is a figure which illustrates the state which attached the coating | coated part of FIG. 4 to the cushion of FIG. It is a figure which illustrates the state which attached the coating | coated part of the comparative example to the cushion of FIG. It is a figure which illustrates the airbag apparatus of a comparative example. It is the graph which compared the impactor reaction force of embodiment of this invention and a comparative example. It is a figure which illustrates the modification of the coating | coated part of FIG.4 (c). It is a figure which illustrates the modification of the patch of Fig.4 (a). It is a figure which illustrates the modification of the cushion of Drawing 3 (a). It is a figure which illustrates the airbag apparatus in the 2nd Embodiment of this invention. It is a figure which illustrates the airbag apparatus in the 3rd Embodiment of this invention. It is a figure which illustrates the modification of the coating | coated part of FIG.

DESCRIPTION OF SYMBOLS 100, 100A, 100B ... Airbag apparatus, 102 ... Vehicle seat, 104 ... Seat back, 106 ... Door, 108 ... Cushion, 108a, 126, 126A, 126B, 160, 176 ... Sewing line, 110 ... Inflator, 110a ... Tip, 110b ... Main body, 112, 112A, 112B, 112C ... Insertion hole, 114 ... Gas supply hole, 116a, 116b ... Stud bolt, 118 ... Hole, 120, 120A, 120B, 120C, 120D ... Cover, 122, 124, 150, 170 ... patch, 128, 134 ... first side, 130, 136 ... second side, 132, 138 ... vertex, 139, 180 ... slit, 140 ... gap, 152 ... first slit, 154 ... second Slit, 172 ... 3rd side, 174 ... 4th side, 178a, 178b ... 1st side Some

  Hereinafter, preferred embodiments of the present invention will be described in detail with reference to the accompanying drawings. The dimensions, materials, and other specific numerical values shown in the embodiments are merely examples for facilitating 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 denoted by the same reference numerals, and redundant description is omitted, and elements not directly related to the present invention are not illustrated. To do.

(First embodiment)
FIG. 1 is a diagram schematically illustrating an airbag device according to a first embodiment of the present invention. The airbag device 100 is built in, for example, the seat back 104 of the vehicle seat 102. The airbag device 100 includes a cushion 108 (see FIG. 2) that is provided on the vehicle outer side of the seat back 104 and that stands and inflates between the vehicle seat 102 and the door 106.

  FIG. 2 is a diagram illustrating a part of the airbag apparatus 100 of FIG. 1 in detail. FIG. 2A illustrates a state in which the cushion 108 is deployed. FIG. 2B is a view as seen from an arrow A in FIG. 2A and shows a state in which the inside of the cushion 108 is viewed. The cushion 108 is formed into a bag shape by, for example, a method of sewing from a total of two base fabrics constituting the front and back surfaces, a method of spinning using OPW (One-Piece Woven), or the like.

  The cushion 108 in this embodiment is composed of a single piece of fabric, and the periphery thereof is sewn by a sewing line 108a to form a bag shape. The airbag device 100 includes an inflator 110. The inflator 110 is a gas generator, and is configured to generate and supply gas by burning an internal gas generating agent. The inflator 110 is a cylinder type (cylinder type), and a part of the inflator 110 is inserted into the inside of the cushion 108 through the insertion hole 112 formed in the cushion 108 to the vicinity of the center as shown in FIG. Is attached.

  A gas supply hole 114 is provided on the tip 110a side of the inflator 110 inserted inside the cushion 108, as shown in FIG. The inflator 110 is provided with stud bolts 116a and 116b protruding from the main body 110b. The stud bolt 116 a is passed through a hole 118 formed in the cushion 108. The inflator 110 is fixed to, for example, the vehicle seat 104 (see FIG. 1) by stud bolts 116a and 116b.

  The airbag device 100 further includes a covering portion 120 as shown in FIG. The covering portion 120 has a pair of patches 122 and 124 provided inside the cushion 108 as shown in FIG. The pair of patches 122 and 124 are arranged so as to sandwich and contact the inflator 110 inserted into the insertion hole 112, and are sewn to the cushion 108 by a sewing line 126.

  FIG. 3 is a diagram illustrating the state of the cushion 108 of FIG. 2 before sewing. The cushion 108 is formed with the insertion hole 112 and the hole 118 as shown in FIG. The insertion hole 112 of the cushion 108 is covered with the covering portion 120 in a state where the inflator 110 is not inserted as shown in FIG.

  FIG. 4 is a diagram illustrating the covering portion 120 of FIG. The covering portion 120 has a pair of patches 122 and 124 as shown in FIG. The patch 122 includes a first side 128 and a second side 130 that contact the inflator 110. The first side 128 and the second side 130 form an obtuse angle θa at the apex 132 on the side where the inflator 110 contacts. The patch 124 includes a first side 134 and a second side 136 that contact the inflator 110. The first side 134 and the second side 136 form an obtuse angle θb at the vertex 138 on the side where the inflator 110 contacts.

  As shown in FIG. 4B, the covering portion 120 is arranged so that the patch 124 faces the insertion hole 112 and the patch 122 is overlapped with the patch 124 from the inside of the cushion 108. The pair of patches 122 and 124 are aligned so that the positions of the vertices 132 and 138 of the obtuse angles θa and θb substantially coincide with each other in a state where they are overlapped as shown in FIG. Covering.

  As shown in FIG. 4C, the covering portion 120 has the first sides 128 and 134 of the pair of patches 122 and 124 overlapped with each other while covering the insertion hole 112. The second sides 130 and 136 are line-symmetric with each other with the first sides 128 and 134 as the symmetry axis. That is, the covering portion 120 is formed by arranging a pair of patches 122 and 124 symmetrically with respect to each other with the first sides 128 and 134 as symmetry axes. In the covering portion 120, the first sides 128 and 134 that are overlapped due to the line symmetry are in a state of forming a slit 139. According to such a covering portion 120, the first sides 128 and 134 form the slit 139, so that the inflator 110 can be more easily inserted through the slit 139.

  Further, the pair of patches 122 and 124 are sewn by a sewing line 126 that surrounds the periphery of the insertion hole 112, thereby reliably covering the insertion hole 112. That is, the insertion hole 112 is closed by the pair of patches 122 and 124 when the inflator 110 is not inserted. Therefore, according to the covering portion 120, when the inflator 110 is inserted, the gap between the inflator 110 and the insertion hole 112 is reduced, the degree of adhesion between the inflator 110 and the pair of patches 122 and 124 is increased, and the degree of sealing is high. It becomes difficult for gas to leak outside.

  FIG. 5 is a diagram illustrating a procedure for inserting the inflator 110 into the covering portion 120 in FIG. 4. FIG. 5A shows a state where the tip 110 a of the inflator 110 and the stud bolt 116 a pass through the insertion hole 112. FIG.5 (b) is a B arrow view of Fig.5 (a).

  The inflator 110 is first inserted into the insertion hole 112 and then sandwiched between the pair of patches 122 and 124 of the covering portion 120 that covers the insertion hole 112. In this state, the inflator 110 contacts and spreads the first sides 128 and 134 of the pair of patches 122 and 124. Here, the second sides 130 and 136 form obtuse angles θa and θb together with the first sides 128 and 134 (see FIG. 4A).

  For this reason, in the covering portion 120, even if the second sides 130 and 136 are sewn on the sewing line 126, as the first sides 128 and 134 are expanded by the inflator 110, the second sides 130 and 136 are also shown in FIG. It is fully expanded as shown in a). Therefore, the inflator 110 can be in contact with the first sides 128 and 134 and can be sufficiently expanded with the passage of the stud bolt 116a. Furthermore, the inflator 110 can easily insert the tip 110a into the cushion 108 through the covering portion 120 without passing through the first widened sides 128 and 134 and being caught by the second sides 130 and 136.

  Next, the stud bolt 116a is passed through the hole 118 while the tip 110a of the inflator 110 is inserted into the cushion 108 along the arrow C in FIG. In this way, the inflator 110 can easily pass through the insertion hole 112 and can be easily inserted into the cushion 108 through the covering portion 120.

  6 is a view illustrating a state in which the covering portion 120 of FIG. 4 is attached to the cushion 108 of FIG. In the drawing, the inflator 110 is inserted into the insertion hole 112 and the cushion 108 is further expanded. As shown in FIG. 6A, when the covering portion 120 is not attached to the cushion 108, a gap 140 is generated between the inflator 110 inserted into the insertion hole 112 and the insertion hole 112.

  Therefore, in this embodiment, as shown in FIG. 5B, a pair of patches 122 and 124 are arranged so as to sandwich the inflator 110 inserted into the insertion hole 112, and this is provided inside the cushion 108 to cover the covering portion. 120 was formed. In the covering portion 120, the first sides 128 and 134 of the pair of patches 122 and 124 are in contact with the inflator 110, and tension is applied to the inflator 110 from the directions indicated by arrows D and E in FIG. Further, in the covering portion 120, not only the first sides 128 and 134 but also the second sides 130 and 136 are in contact with the inflator 110, and tension is applied to the inflator 110 from the direction indicated by the arrow F.

  In this way, the covering portion 120 can block the gap 140 between the insertion hole 112 of the cushion 108 and the inflator 110 by the pair of patches 122 and 124 that apply tension to the inflator 110 from the arrows D, E, and F. it can. Therefore, the covering portion 120 can prevent gas from leaking outside the cushion 108 through the insertion hole 112.

  FIG. 7 is a view illustrating a state in which the cover portion 120A of the comparative example is attached to the cushion 108 of FIG. The covering portion 120A of the comparative example has a pair of patches 122A and 124A as shown in FIG. The pair of patches 122A and 124A include the first sides 128A and 134A in contact with the inflator 110, but do not include the second sides 130 and 136 described above.

  In the covering portion 120A of the comparative example, the first sides 128A and 134A of the pair of patches 122A and 124A are in contact with the inflator 110, and tension is applied to the inflator 110 from the directions indicated by arrows D and E in FIG. However, since the covering portion 120A does not include the second sides 130 and 136, the gap 140 between the insertion hole 112 of the cushion 108 and the inflator 110 cannot be closed as shown in FIG. Therefore, when the covering portion 120 </ b> A of the comparative example is provided inside the cushion 108, gas leaks to the outside of the cushion 108 through the insertion hole 112.

  FIG. 8 is a diagram illustrating an airbag device 200 of a comparative example. FIG. 8A is a view showing the cushion 202 of the airbag device 200. FIG. 8B is a diagram illustrating a state where the inflator 110 is inserted into the cushion 202.

  The airbag device 200 differs from the airbag device 100 of the present embodiment in that the covering portion 120 is not formed on the cushion 202. As shown in FIG. 8A, the cushion 202 is formed with an insertion hole 204 of the inflator 110 and a hole 206 through which the stud bolt 116a is passed.

  In the airbag device 200 of the comparative example, when the inflator 110 is operated, the cushion 202 is folded as shown by a broken line 202b in FIG. Thereafter, the cushion 202 behaves like being expanded and folded as it expands. Due to such behavior, in particular, the swing and extension of the cushion 202, a large gap 208 is formed between the inflator 110 and the insertion hole 204 as shown in FIG.

  FIG. 9 is a graph comparing impactor reaction forces between the embodiment of the present invention and the comparative example. In FIG. 9A, the horizontal axis is time, and the vertical axis is the impactor reaction force. FIG. 9B shows the average impactor reaction force of the embodiment of the present invention shown in FIG. 9A and the average impactor reaction force of the comparative example. In addition, as a comparative example, the airbag apparatus 200 illustrated in FIG. 8 is used in which the covering portion 120 is not formed.

  Here, instead of directly measuring the gas leakage from the insertion hole 112 into which the inflator 110 is inserted, the impactor reaction force when the impactor collides with the cushion 108 was measured. As the impactor reaction force, the impactor is in contact with the wall surface or the like via the cushion 108, and is used before the so-called bottoming. Note that if there is a large amount of gas leakage, it is assumed that the pressure in the cushion 108 will decrease. Therefore, it is possible to indirectly compare the gas leakage by using the impactor reaction force.

  FIG. 9A illustrates a graph of a first sample that is an embodiment of the present invention and graphs of a second sample, a third sample, and a fourth sample that are comparative examples. Comparing these graphs, it is clear that the impactor reaction force of the embodiment of the present invention is larger than that of the comparative example, as illustrated in FIG. 9A. This is because the pair of patches 122 and 124 forming the covering portion 120 are arranged so as to sandwich the inflator 110, thereby closing the gap between the inflator 110 and the insertion hole 112 after the operation of the inflator 110. .

  For this reason, in the airbag device 100, even if the gap 140 (see FIG. 6A) is generated in the insertion hole 112 due to the vibration and expansion at the time of deployment of the cushion 108, the airbag device 100 is in contact with the inflator 110. Gas leakage can be reduced by the covering portion 120 that functions to close the gap 140. As a result, as shown in FIG. 9B, it was confirmed that the average of the impactor reaction force of the present invention was improved by about 500 [N] compared to the average of the impactor reaction force of the comparative example. .

  Thus, in the present embodiment, not only the first side 128 and 134 but also the second side 130 and 136 are in contact with the inflator 110 in a state where the pair of patches 122 and 124 of the covering portion 120 are in contact with each other. Therefore, according to the covering portion 120, the gap 140 between the insertion hole 112 and the inflator 110 can be closed, and when the inflator 110 is operated, the gas hardly leaks to the outside of the cushion 108 through the insertion hole 112.

  Further, in this embodiment, since the insertion hole 112 is covered with the covering portion 120 from the inside of the cushion 108, the sealing performance is improved, and when the inflator 110 is activated and the cushion 108 is deployed, the cushion 108 passes through the insertion hole 112. Gas is more difficult to leak outside. However, the covering portion 120 is not limited to the inside of the cushion 108 and may be provided outside the cushion 108. In this way, the covering portion 120 can be easily provided on the cushion 108. Furthermore, by ensuring adequate clearance between the first sides 128 and 134 and the second sides 130 and 136 of the pair of patches 122 and 124 in the covering portion 120 and the outer periphery of the inflator 110, sealing performance can be secured.

  Further, when the inflator 110 is inserted into the cushion 108 through the insertion hole 112 of the cushion 108, the inflator 110 presses the first side 128, 134 and the second side 130, 136 that form obtuse angles θa, θb while pressing the inflator 110. Spread and pass through a pair of patches 122,124. Therefore, according to the present embodiment, gas leakage during operation of the inflator 110 can be reduced, and the inflator 110 can be easily inserted into the insertion hole 112.

  FIG. 10 is a diagram illustrating a modified example of the covering portion 120 of FIG. In the covering portion 120, the pair of patches 122 and 124 are provided inside the cushion 108 by the sewing line 126, but the sewing line 126 may have an appropriate shape as long as it surrounds the insertion hole 112. Good.

  As an example, the covering portion 120B is provided inside the cushion 108 using a circular sewing line 126A as shown in FIG. In the covering portion 120B using the circular sewing line 126A, since the inflator 110 is cylindrical, a relatively uniform force can be applied to the entire sewing line 126A when the inflator 110 is inserted.

  The covering portion 120C shown in FIG. 10B is provided on the inner side of the cushion 108 using a lattice-like sewing line 126B. In the covering portion 120C, by using the grid-like sewing line 126B, not only is it easy to sew, but also there are places where sewing is doubled, so a pair of patches 122, 124 should be securely provided inside the cushion 108. Can do.

  Further, in the covering portions 120B and 120C as well as the covering portion 120, since the overlapping first sides 128 and 134 form a slit 139, the inflator 110 can be more easily inserted through the slit 139.

  In the above embodiment, the pair of patches 122 and 124 includes the first sides 128 and 134 and the second sides 130 and 136 that form the obtuse angles θa and θb on the side in contact with the inflator 110. The first sides 128 and 134, the second sides 130 and 136, and other external shapes may be appropriate shapes. Below, the modification of the patch 122 among a pair of patches 122 and 124 is demonstrated.

  FIG. 11 is a diagram illustrating a modification of the patch 122 in FIG. As shown in FIG. 11A, the patch 122 </ b> B of the modified example includes a first side 128 </ b> B and a second side 130 </ b> B that are straight lines forming an obtuse angle θa on the side in contact with the inflator 110, Is a rectangle. The outer shape is not limited to a rectangle, but may be a triangle.

  The patch 122C shown in FIG. 11B includes a first side 128C made of a straight line forming an obtuse angle θc on the side in contact with the inflator 110 and a second side 130C made of a curve, and the outer shape on the side not in contact with the inflator 110 is Part of a circle. Thus, by combining the first side 128 </ b> C made of a straight line and the second side 130 c made of a curve, the shape of the patch 122 </ b> C on the side in contact with the inflator 110 can be matched with the outer shape of the inflator 110. Therefore, the inflator 110 is easily in contact with the first side 128C and the second side 130C of the patch 122C, and if the covering portion is formed using the patch 122C, gas leakage can be further reduced.

  FIG. 12 is a diagram illustrating a modification of the cushion 108 in FIG. As shown in FIG. 12A, the cushion 108A according to the modification has an insertion hole 112A that is a slot that is long in the vertical direction in the figure. Further, the cushion 108B shown in FIG. 12B has an insertion hole 112B which is a slot long in the left-right direction in the drawing.

  In this way, if the insertion holes 112A and 112B of the cushions 108A and 108B are formed into slots that are long in one direction, when the inflator 110 is inserted into the insertion holes 112A and 112B, the insertion direction is adjusted to one direction of the slot. The inflator 110 can be easily inserted through the insertion holes 112A and 112B.

(Second Embodiment)
FIG. 13 is a diagram illustrating an airbag device 100A according to the second embodiment of the present invention. The airbag apparatus 100A includes the patch 150 that covers the slit-shaped insertion hole 112C formed in the cushion 108C in place of the covering portion 120 including the pair of patches 122 and 124 described above. And different.

  The slit-shaped insertion hole 112 </ b> C includes a first slit 152 and a second slit 154 as shown in FIG. As shown in FIG. 13B, the first slit 152 and the second slit 154 form an obtuse angle θd. As illustrated in FIG. 13B, the patch 150 is overlapped so as to cover the insertion hole 112 </ b> C, and includes a third slit 156 and a fourth slit 158. The third slit 156 overlaps the first slit 152. The fourth slit 158 is line symmetric with respect to the second slit 154 with the first slit 152 as an axis of symmetry, and forms an obtuse angle θe with the third slit 156. The patch 150 is provided inside the cushion 108C by a sewing line 160 surrounding the slit-shaped insertion hole 112C.

  According to the airbag device 100A, with the slit-shaped insertion hole 112C and the patch 150 sandwiching the inflator 110, the first slit 152 and the second slit 154 of the insertion hole 112C, the third slit 156 of the patch 150, and The fourth slits 158 are in contact with the inflator 110, respectively. Therefore, the insertion hole 112 </ b> C and the patch 150 sandwich the inflator 110 not only by the first slit 152 and the third slit 156 but also by the second slit 154 and the fourth slit 158.

  Therefore, according to the insertion hole 112C and the patch 150, the gap between the insertion hole 112C and the inflator 110 can be closed. Therefore, when the inflator 110 is activated, gas is less likely to leak out of the cushion 108C through the insertion hole 112C. Further, since the insertion hole 112C has a slit shape, only one patch 150 is required, and the structure can be simplified. Furthermore, the patch 150 can also serve as a reinforcing cloth covering the slit-shaped insertion hole 112C.

  When the inflator 110 is inserted into the cushion 108C through the insertion hole 112C of the cushion 108C, the inflator 110 pushes the first slit 152 and the third slit 156 in contact with each other. Then, as the first slit 152 and the third slit 156 are expanded, the second slit 154 and the fourth slit 158 are also expanded by the inflator 110. In this way, the inflator 110 can pass through the insertion hole 112C and the patch 150. Therefore, according to the airbag device 100A, not only can gas leakage during operation of the inflator 110 be reduced, but also the inflator 110 can be easily inserted into the insertion hole 112C.

(Third embodiment)
FIG. 14 is a diagram illustrating an airbag device 100B according to the third embodiment of the present invention. The airbag device 100B is different from the airbag device 100A including the patch 150 described above in that the third side 172 and the fourth side 174 are formed on the outer shape of the patch 170 covering the slit-shaped insertion hole 112C.

  The patch 170 includes a third side 172 and a fourth side 174 as shown in FIG. As shown in FIG. 14B, the third side 172 and the fourth side 174 form an obtuse angle θf on the side in contact with the inflator 110. As shown in FIG. 14B, the patch 170 is overlaid so as to cover the insertion hole 112C. The third side 172 overlaps the first slit 152 of the insertion hole 112C. The fourth side 174 is line symmetric with respect to the second slit 154 with the first slit 152 as the axis of symmetry, and forms an obtuse angle θf with the third side 172. The patch 170 is provided inside the cushion 108C by a sewing line 176.

  According to the airbag device 100B, with the slit-shaped insertion hole 112C and the patch 170 sandwiching the inflator 110, the first slit 152 and the second slit 154 of the insertion hole 112C, the third side 172 of the patch 170, and The fourth side 174 is in contact with the inflator 110. Therefore, the insertion hole 112 </ b> C and the patch 170 sandwich the inflator 110 not only by the first slit 152 and the third side 172 but also by the second slit 154 and the fourth side 174.

  Therefore, according to the insertion hole 112C and the patch 170, the gap between the insertion hole 112C and the inflator 110 can be closed. Therefore, when the inflator 110 is activated, gas is less likely to leak out of the cushion 108C through the insertion hole 112C. Furthermore, since the insertion hole 112C has a slit shape, only one patch 170 is required, and the structure can be simplified.

  Further, when the inflator 110 is inserted into the cushion 108C through the insertion hole 112C of the cushion 108C, the inflator 110 pushes the first slit 152 and the third side 172 in contact therewith. Then, as the first slit 152 and the third side 172 are expanded, the second slit 154 and the fourth side 174 are also expanded by the inflator 110. In this way, the inflator 110 can pass through the insertion hole 112C and the patch 170. Therefore, according to the airbag device 100B, not only can gas leakage during operation of the inflator 110 be reduced, but also the inflator 110 can be easily inserted into the insertion hole 112C.

  In the airbag devices 100A and 100B, the high sealing performance is secured by covering the insertion hole 112C with the patches 150 and 170 from the inside of the cushion 108C. However, the present invention is not limited to this, and the patches 150 and 170 are provided outside the cushion 108C. May be provided. In this way, the patches 150 and 170 can be easily provided on the cushion 108C. Further, when the insertion hole 112C is covered with the patches 150 and 170 from the outside of the cushion 108C, the clearance between the third slit 156 and the fourth slit 158 and the outer periphery of the inflator 110, and the third side 172 and the fourth side 174 and the inflator 110 By properly securing the clearance with the outer periphery of each, sealing performance can be secured.

  FIG. 15 is a diagram illustrating a modified example of the covering portion 120 in FIG. 4. The covering portion 120D as a modified example is arranged such that the pair of patches 122, 124 are arranged symmetrically with respect to each other about predetermined points G, H on the first sides 128, 134. It differs from the coating | coated part 120 formed symmetrically. Hereinafter, a procedure for forming the covering portion 120D will be described.

  First, as shown in FIG. 15A, the pair of patches 122 and 124 are arranged such that the first side 128 and the second side 136, and the second side 130 and the first side 134 face each other. Next, as shown in FIG. 15B, a pair of patches 122 and 124 are overlapped so that predetermined points G and H on the first sides 128 and 134 coincide with each other. As a result, as shown in FIG. 15C, the pair of patches 122 and 124 are formed at portions 178a and 178b between the first sides 128 and 134 around the predetermined points G and H on the first sides 128 and 134, respectively. Are arranged symmetrically with respect to each other so as to overlap. In this way, the covering portion 120D is formed, and the portions 178a and 178b of the overlapping first sides 128 and 134 form the slit 180. The portions 178a and 178b between the first sides 128 and 134 are located between the vertices 132 and 138 forming the obtuse angles θa and θb as shown in the figure.

  Accordingly, the covering portion 120D can be formed such that the pair of patches 122 and 124 are arranged point-symmetrically and the portions 178a and 178b between the first sides 128 and 134 form the slit 180. Further, in the covering portion 120D, since the portions 178a and 178b between the first sides 128 and 134 form the slit 180, the length of the slit 180 is shorter than the covering portion 120 where the first sides 128 and 134 form the slit 139. it can. Therefore, according to the covering portion 120D, when the inflator 110 is inserted through the slit 180, the degree of adhesion between the inflator 110 and the patches 122 and 124 increases, the degree of sealing becomes high, and the gas hardly leaks to the outside.

  In the said embodiment, although the side airbag was illustrated as an airbag apparatus, it is not limited to this. That is, the present invention provides a side window from the vicinity of the ceiling of the wall to protect the occupant from side collisions and subsequent rollover (rollover) in addition to side airbags such as near-side airbags and far-side airbags. The present invention is applicable to airbags using a cylinder-type inflator, such as curtain airbags that are inflated and deployed along the knees and knee airbags (KAB) that are deployed on the side of the thigh of the occupant. When the airbag device is a curtain airbag, a hole is formed in a duct portion into which gas is introduced, and an inflator may be inserted into the hole.

  As mentioned above, although preferred embodiment of this invention was described referring an accompanying drawing, it cannot be overemphasized that this invention is not limited to the example which concerns. 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 naturally within the technical scope of the present invention. Is done.

  Moreover, although the example which applied the airbag apparatus concerning this invention to the motor vehicle was demonstrated in the said embodiment, it is also possible to apply to an aircraft, a ship, etc. besides a motor vehicle, and can obtain the same effect. it can.

  INDUSTRIAL APPLICABILITY The present invention can be used for an airbag device that is installed in a vehicle and inflated and deployed for the purpose of protecting passengers in an emergency.

Claims (15)

An airbag device installed in a vehicle,
A cylinder-type inflator;
A bag-like cushion that expands and deploys using the gas supplied from the inflator; and
An insertion hole formed in the cushion, through which at least a portion of the inflator is inserted into the cushion through the insertion hole;
A covering portion covering the insertion hole,
The covering portion is
Having a pair of patches arranged so as to sandwich and contact the inflator inserted in the insertion hole;
Each of the pair of patches includes a first side and a second side that form an obtuse angle on the side in contact with the inflator.   The airbag device according to claim 1, wherein the covering portion is provided inside the cushion.   The airbag device according to claim 1, wherein the covering portion is provided outside the cushion.   The airbag device according to any one of claims 1 to 3, wherein a position of the obtuse angle apex of each of the pair of patches coincides.   The airbag device according to any one of claims 1 to 4, wherein the first side and the second side include a straight line or a curved line.   The airbag device according to any one of claims 1 to 5, wherein the pair of patches are sewn to the cushion by a sewing line that surrounds the periphery of the insertion hole.   The airbag device according to claim 6, wherein the sewing line is circular or lattice-shaped.   The airbag device according to any one of claims 1 to 7, wherein the insertion hole is a slot that is long in one direction.   The pair of patches are arranged symmetrically with respect to each other about the first sides as symmetry axes, and the first sides overlapped with each other due to the symmetrical arrangement are slits. Item 9. The airbag device according to any one of Items 1 to 8.   The pair of patches are arranged symmetrically with respect to each other such that at least a part of the first sides overlap with each other about a predetermined point on the first side of both patches, and at least one of the first sides overlapped with each other. The airbag device according to any one of claims 1 to 3, and 5 to 8, wherein the portion is in a slit state. An airbag device installed in a vehicle,
A cylinder-type inflator;
A bag-like cushion that expands and deploys using the gas supplied from the inflator; and
An insertion hole formed in the cushion, and a slit-like insertion hole into which at least a part of the inflator is inserted into the cushion through the insertion hole;
A patch covering the slit-shaped insertion hole,
The slit-shaped insertion hole includes a first slit and a second slit forming an obtuse angle,
The patch includes a third slit that overlaps the first slit, and a fourth slit that is axisymmetric to the second slit with respect to the first slit and has an obtuse angle with the third slit. apparatus. An airbag device installed in a vehicle,
A cylinder-type inflator;
A bag-like cushion that expands and deploys using the gas supplied from the inflator; and
An insertion hole formed in the cushion, and a slit-like insertion hole into which at least a part of the inflator is inserted into the cushion through the insertion hole;
A patch covering the slit-shaped insertion hole,
The slit-shaped insertion hole includes a first slit and a second slit forming an obtuse angle,
The airbag has a third side that overlaps the first slit, and a fourth side that is axisymmetric with respect to the second slit with the first slit as an axis of symmetry and forms an obtuse angle with the third side. apparatus.   The airbag device according to claim 11 or 12, wherein the patch is provided inside the cushion.   The airbag device according to claim 11 or 12, wherein the patch is provided outside the cushion.   The airbag device according to any one of claims 1 to 14, wherein the insertion hole is closed by the patch when the inflator is not inserted.

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