Vehicular seat

Abstract

To provide a vehicular seat which can facilitate mounting of webbing for guiding a deployment direction of an air bag.SOLUTION: A seat S is a vehicular seat provided with an air bag module 10 including a bag body 11. The seat S includes: a side frame 20 on which the air bag module 10 is mounted; a first webbing 30 which guides a deployment direction of the bag body 11; and a webbing bracket 40 which is mounted in the side frame 20 and is for fixing the first webbing 30. The first webbing 30 has a first lock section 31 formed into a ring-shape. The webbing bracket 40 has a first slit 41 to mount the first webbing 30. The first slit 41 has a first opening 41A provided at a first edge 40B of the webbing bracket 40 and a first holding section 41B for holding the first lock section 31 of the first webbing 30 passed through the first opening 41A.SELECTED DRAWING: Figure 2

Description

[Technical field]

[0001] The present invention relates to a vehicle seat, and more particularly to a vehicle seat equipped with an airbag. [Background technology]

[0002] 2. Description of the Related Art Vehicle seats equipped with side airbag devices that protect occupants by inflating and deploying an airbag provided on the side of the vehicle seat in the event of a side collision of the vehicle are known (see, for example, Patent Document 1 listed below).

[0003] In the vehicle seat described in Patent Document 1, a hole is formed in a bracket fixed to a side frame, and the end of the webbing is passed through the hole and then sewn together to attach the webbing to the bracket. [Prior art documents] [Patent documents]

[0004] [Patent Document 1] International Publication No. 2012 / 035619 Summary of the Invention [Problem to be solved by the invention]

[0005] In the above-mentioned conventional technology, since it is necessary to sew the webbing after passing the webbing through the holes in the bracket, the work of attaching the webbing to the bracket is laborious.

[0006] The present invention has been made in consideration of the above problems, and an object of the present invention is to provide a vehicle seat that makes it easy to attach a webbing that guides the deployment direction of an airbag. [Means for solving the problem]

[0007] The above problem is solved by the vehicle seat of the present invention, which is a vehicle seat equipped with an airbag module including a bag body, comprising a frame member to which the airbag module is attached, a first webbing that guides the deployment direction of the bag body, and a webbing bracket that is attached to the frame member and for fixing the first webbing, wherein the first webbing has a first engagement portion formed in a ring shape, and the webbing bracket has a first slit for attaching the first webbing, the first slit having a first opening provided on a first edge portion of the webbing bracket and a first retaining portion that retains the first engagement portion of the first webbing passed through the first opening.

[0008] According to the above-mentioned vehicle seat, a portion of the first slit for attaching the first webbing in the webbing bracket is open, so that the ring-shaped first engagement portion of the first webbing can be attached to the webbing bracket through the first slit. That is, according to the above vehicle seat, the webbing can be easily attached.

[0009] In the vehicle seat described above, the first slit may have a first bent portion connecting the first opening and the first holding portion. This makes it possible to prevent the first webbing from coming off the webbing bracket.

[0010] In the vehicle seat described above, corners of the first opening may be chamfered. This can prevent the first webbing from being damaged when the first webbing is attached to the first slit.

[0011] In the vehicle seat described above, the webbing bracket may have a flange portion formed along the first retaining portion. This can improve the rigidity of the webbing bracket, thereby enabling the webbing bracket to stably hold the first webbing. In addition, by dispersing the contact points between the first engaging portions of the first webbing and the webbing bracket, the load on the first engaging portions can be dispersed, thereby suppressing damage to the first webbing.

[0012] In the vehicle seat described above, the flange portion may be longer than the first retaining portion. This makes it possible to further improve the rigidity of the webbing bracket, thereby enabling the webbing bracket to hold the first webbing more stably.

[0013] In the vehicle seat described above, the flange portion may protrude toward the airbag module. This can prevent the first webbing from being damaged by the flange portion of the webbing bracket when the airbag is deployed.

[0014] In the vehicle seat described above, the first retaining portion may be formed linearly and have a length greater than a width of the first webbing. In this way, the first webbing can be held by the webbing bracket without causing wrinkles at the ends of the first webbing.

[0015] In the vehicle seat described above, the first bent portion may be connected between upper and lower ends of the first holding portion. This makes it possible to further prevent the first webbing from coming off the webbing bracket.

[0016] In the vehicle seat described above, the webbing bracket may have a first through hole and a second through hole for mounting the airbag module, the first through hole and second through hole being formed in a position spanning the first slit. In this manner, by mounting the airbag module at a position spanning the first slit, it is possible to prevent the first webbing from coming off the webbing bracket.

[0017] In the vehicle seat described above, it is preferable that a bolt provided on an inflator included in the airbag module is attached to the first through hole and the second through hole. By attaching the inflator so as to block the first slit in this manner, the first webbing can be further prevented from coming off the webbing bracket.

[0018] In the above vehicle seat, it is preferable that the first retaining portion and a line segment connecting the first through hole and the second through hole are substantially parallel to each other. In this way, by providing the first retaining portion approximately parallel to the line segment connecting the first through hole and the second through hole, the force applied to the first fastening portion of the first webbing during deployment can be distributed in a well-balanced manner, thereby enabling the airbag to be deployed stably.

[0019] In the above vehicle seat, the first retaining portion may be formed at a position that overlaps in the up-down direction with a line segment that connects the first through hole and the second through hole. This allows the force applied to the first fastening portion of the first webbing to be distributed in a well-balanced manner when the airbag is deployed, thereby enabling the airbag to be deployed more stably.

[0020] In the above-mentioned vehicle seat, it is preferable that the vehicle seat further includes a second webbing that guides the deployment direction of the bag body, the second webbing having a second engagement portion formed in a ring shape, the webbing bracket having a second slit for attaching the second webbing, the second slit having a second opening provided in a second edge portion of the webbing bracket and a second retaining portion that retains the second engagement portion of the second webbing passed through the second opening. In this way, the first webbing and the second webbing can be attached to one webbing bracket, which can further stabilize the direction of deployment of the airbag.

[0021] In the above vehicle seat, the first webbing may be an inner side webbing, the second webbing may be an outer side webbing, and the webbing bracket may have a bolt fastening portion provided below the second retaining portion. This makes it possible to further stabilize the direction in which the airbag deploys. Furthermore, by further forming a bolt fastening portion on the webbing bracket, the mounting rigidity of the webbing bracket against outward pulling forces can be improved.

[0022] In the vehicle seat described above, it is preferable that the bolt fastening portion has an upper side that is closed and a lower side that is open. Since the upper side of the bolt fastening portion is closed in this manner, it is easy to position the bolt to be attached to the bolt fastening portion.

[0023] In the above vehicle seat, a line segment connecting the first through hole and the second through hole may be located between the first retaining portion and the second retaining portion. This allows the first and second retaining parts to be positioned apart from the fastening point of the airbag module. This makes it possible to reverse the pulling directions of the first and second webbing when the airbag deploys, and cancel out the pulling forces of each other. This prevents a strong force from being applied to the webbing bracket when the airbag deploys, and thus prevents the webbing bracket from coming off.

[0024] In the vehicle seat described above, the webbing bracket may have a step portion formed between the bolt fastening portion and the second retaining portion. This prevents the bolt fastening portion from being subjected to a strong tensile force from the first and second webbing, thereby preventing a strong force from being applied to the webbing bracket when the airbag is deployed, and thus further prevents the webbing bracket from coming off.

[0025] According to the present invention, it is possible to easily attach the webbing that guides the deployment direction of the airbag. According to the present invention, it is possible to prevent the first webbing from coming off the webbing bracket. According to the present invention, damage to the first webbing can be suppressed when the first webbing is attached to the first slit. According to the present invention, the rigidity of the webbing bracket can be improved. According to the present invention, it is possible to prevent the first webbing from being damaged by the flange portion of the webbing bracket when the airbag is deployed. According to the present invention, the first webbing can be held by the webbing bracket without causing wrinkles at the ends of the first webbing. According to the present invention, the force acting on the first fastening portion of the first webbing when the airbag is deployed can be distributed in a well-balanced manner. According to the present invention, the deployment direction of the airbag can be more stabilized. According to the present invention, the mounting rigidity of the webbing bracket against outward pulling force can be improved. According to the present invention, the positioning of a bolt to be attached to a bolt fastening portion can be facilitated. According to the present invention, the first webbing and the second webbing are pulled in opposite directions when the airbag is deployed, so that the pulling forces of the first webbing and the second webbing can be offset. According to the present invention, it is possible to prevent a strong tensile force from the first webbing and the second webbing from being applied to the bolt fastening portion. [Brief description of the drawings]

[0026] [Figure 1] FIG. 2 is a perspective view of a seat according to the embodiment. [Diagram 2] FIG. 2 is a cross-sectional view taken along line II-II of FIG. [Diagram 3] FIG. 2 is a diagram showing an airbag module attached to a side frame. [Figure 4] FIG. 13 is a diagram showing a webbing bracket attached to a side frame. [Diagram 5] FIG. 4 is a diagram showing the configuration of a side frame. [Figure 6] FIG. 13 is a diagram showing the configuration of a webbing bracket. [Figure 7] FIG. 13 is a view showing a state in which a first webbing and a second webbing are attached to a webbing bracket. [Figure 8] FIG. 11 is a view showing a webbing bracket according to a first modified example. [Figure 9] FIG. 13 is a view showing a webbing bracket according to a second modified example. [Figure 10]FIG. 13 is a view showing a webbing bracket according to a third modified example. [Figure 11] FIG. 13 is a view showing a webbing bracket according to a fourth modified example. [Figure 12] FIG. 13 is a view showing a webbing bracket according to a fifth modified example. [Figure 13] FIG. 13 is a view showing a webbing bracket according to a sixth modified example. DETAILED DESCRIPTION OF THE PREFERRED EMBODIMENTS

[0027] Hereinafter, a seat S according to an embodiment of the present invention (hereinafter, this embodiment) will be described with reference to FIGS. In this embodiment, the seat S will be described using a vehicle seat installed in a vehicle as an example, but the seat S is not limited to vehicle seats installed in ground-traveling vehicles having wheels such as automobiles and trains, and may also be seats installed in aircraft, ships, and other vehicles that move other than on land. The embodiment described below is merely an example for facilitating understanding of the present invention, and is not intended to limit the present invention. In other words, the shapes, dimensions, arrangements, and other aspects of the components described below may be modified or improved without departing from the spirit of the present invention, and the present invention naturally includes equivalents thereof.

[0028] In the following description, the term "front-rear direction" refers to the front-rear direction as seen by a person sitting in the seat S, and is the same as the direction in which the vehicle travels. The "seat width direction" refers to the horizontal width direction of the seat S, which coincides with the left-right direction when viewed from a person sitting in the seat S. Moreover, the "vertical direction" refers to the height direction of the seat S, and coincides with the vertical direction when the seat S is viewed from the front.

[0029] <Composition of Sheet S> Fig. 1 shows a perspective view of a seat S. In Fig. 1, a part of the seat S (specifically, a front corner of a seat back S1) is shown with the cover material 2 removed for convenience of illustration.

[0030] The seat S has as its main components a seat back S1 which serves as the backrest supporting the back of the seated occupant, a seat cushion S2 which serves as the seating portion supporting the buttocks of the seated occupant, and a headrest S3 which is disposed on top of the seat back S1 and supports the head of the seated occupant.

[0031] The seat back S1 is constructed by placing a pad material 1 on a seat back frame and covering it with a skin material 2. The seat cushion S2 is constructed by placing a pad material 1 on a seat cushion frame and covering it with a cover material 2. The headrest S3 is constructed by disposing a padding material 1 on a core material and covering it with a skin material 2. The pad material 1 is a urethane base material formed by foam molding using, for example, a urethane foam material. The cover material 2 provided on the seat S is made of a material such as cloth or leather.

[0032] As shown in FIG. 1, an airbag module 10 is provided inside the side of the seat back S1. 2, the airbag module 10 includes therein a bag body 11 and an inflator 12. The inflator 12 is a device that generates gas when it receives an activation signal from a sensor that detects a vehicle collision, and injects the generated gas into the bag body 11 to inflate and deploy the bag body 11. The mounting structure of the airbag module 10 will now be described in detail.

[0033] 2 and 3, the airbag module 10 is attached to a side frame 20. The side frame 20 is a frame member that constitutes the side portion of a seat back frame that constitutes the skeleton of the seat back S1. In this embodiment, the side frame 20 is configured in a shape in which the front end and the rear end of a plate-like member are each bent inward in the seat width direction.

[0034] 4, a webbing bracket 40 is attached to a side surface of the side frame 20. Specifically, the webbing bracket 40 is attached to the side surface of the side frame 20 on the outer side in the seat width direction. Here, the webbing bracket 40 is a member for attaching the first webbing 30 (inner side webbing) and the second webbing 35 (outer side webbing), which are webbing for guiding the deployment direction of the bag body 11 of the airbag module 10. Hereinafter, the configuration of the webbing bracket 40 will be described with reference to Figs. 6 and 7.

[0035] <Configuration of the Webbing Bracket 40> As shown in Figures 6 and 7, the webbing bracket 40 has a plate portion 40A, flange portions 43 (front flange portion 43A and rear flange portion 43B) provided at the front and rear ends of the plate portion 40A, and a bolt fastening portion 46. The plate portion 40A may be made of a material such as resin or metal.

[0036] Here, the plate portion 40A is a flat plate-shaped portion to which the first webbing 30, the second webbing 35 and the airbag module 10 are attached. Specifically, a first slit 41, a second slit 42, a first through hole 44, and a second through hole 45 are formed in the plate portion 40A.

[0037] <<First slit 41>> The first slit 41 is a slit formed in the webbing bracket 40 for mounting the first webbing 30, and is formed from a first edge portion 40B at the upper end of the plate portion 40A toward the inside. Specifically, the first slit 41 has a first opening 41A, a first holding portion 41B, and a first bent portion 41C.

[0038] As shown in Figs. 2 and 7, the first webbing 30 has a first engaging portion 31 formed into a ring shape by folding back an end portion and sewing it at a first sewn portion 31A. Then, by passing the first locking portion 31 of the first webbing 30 through the first opening 41A, the first bent portion 41C, and the first retaining portion 41B in that order, the first locking portion 31 of the first webbing 30 can be locked to the first retaining portion 41B, as shown in Figure 7.

[0039] The first opening 41A is provided in the first edge 40B, and the corners 41Aa of the first opening 41A are chamfered and rounded, thereby preventing the first webbing 30 from being damaged when the first engaging portion 31 of the first webbing 30 is passed through the first opening 41A.

[0040] The first holding portion 41B holds the first engagement portion 31 of the first webbing 30 passed through the first opening 41A. Here, the first holding portion 41B extends in the up-down direction. In other words, the first holding portion 41B is formed in a straight line substantially parallel to the flange portion 43 formed at the end of the webbing bracket 40 in the front-rear direction. The flange portion 43 (the front flange portion 43A and the rear flange portion 43B) is longer in the up-down direction than the first holding portion 41B.

[0041] Further, the first holding portion 41B is formed on the plate portion 40A between the first edge portion 40B and the second edge portion 40C. As shown in FIG. 7, the first holding portion 41B is formed linearly and is longer than the width of the first webbing 30 (first fastening portion 31). In this way, since the first retaining portion 41B is formed in a straight line and is longer than the width of the first webbing 30, the first webbing 30 can be held by the webbing bracket 40 without creating wrinkles in the first engagement portion 31 of the first webbing 30.

[0042] The first slit 41 has a first bent portion 41C that connects the first opening 41A and the first holding portion 41B. Specifically, the first bent portion 41C is bent in an L-shape, and the portion where the first bent portion 41C is connected to the first holding portion 41B is located between an upper end 41Ba and a lower end 41Bb of the first holding portion 41B. This makes it possible to prevent the first locking portion 31 from moving toward the first bent portion 41C even if the first locking portion 31 held by the first holding portion 41B shifts upward. This makes it possible to prevent the first webbing 30 from coming off the first holding portion 41B.

[0043] <<Second slit 42>> Next, the second slit 42 will be described. The second slit 42 is a slit formed in the webbing bracket 40 for attaching the second webbing 35, and is formed from a second edge portion 40C at the lower end of the plate portion 40A toward the inside. Specifically, as shown in FIG. 7, the second slit 42 has a second opening 42A, a second holding portion 42B, and a second bent portion 42C.

[0044] As shown in Figs. 2 and 7, the second webbing 35 has a second engaging portion 36 formed into a ring shape by folding back an end portion and sewing it at a second sewn portion 36A. Then, by passing the second locking portion 36 of the second webbing 35 through the second opening 42A, the second bending portion 42C, and the second retaining portion 42B in that order, the second locking portion 36 of the second webbing 35 can be locked to the second retaining portion 42B, as shown in Figure 7.

[0045] The second opening 42A is provided in the second edge portion 40C, and the corners 42Aa of the second opening 42A are chamfered and rounded, thereby preventing the second webbing 35 from being damaged when the second engaging portion 36 of the second webbing 35 is passed through the second opening 42A.

[0046] The second holding portion 42B holds the second engagement portion 36 of the second webbing 35 passed through the second opening 42A. Here, the second holding portion 42B extends in the up-down direction. In other words, the second holding portion 42B is formed in a straight line substantially parallel to the flange portion 43 formed at the end of the webbing bracket 40 in the front-rear direction. The flange portion 43 (the front flange portion 43A and the rear flange portion 43B) is longer in the up-down direction than the second holding portion 42B. Further, the second holding portion 42B is formed on the plate portion 40A between the first edge portion 40B and the second edge portion 40C.

[0047] As shown in FIG. 7, the second holding portion 42B is formed linearly and is longer than the width of the second webbing 35 (second locking portion 36). In this way, since the second retaining portion 42B is formed in a straight line and is longer than the width of the second webbing 35, the second webbing 35 can be retained by the webbing bracket 40 without creating wrinkles in the second engagement portion 36 of the second webbing 35.

[0048] The second slit 42 has a second bent portion 42C that connects the second opening 42A and the second holding portion 42B. Specifically, the second bent portion 42C is bent in an L-shape, and the portion where the second bent portion 42C is connected to the second holding portion 42B is located between an upper end 42Ba and a lower end 42Bb of the second holding portion 42B. In this way, even if the second locking portion 36 held by the second holding portion 42B shifts upward, the second locking portion 36 can be prevented from moving toward the second bent portion 42C. This makes it possible to prevent the second webbing 35 from coming off the second holding portion 42B.

[0049] <<Flange part 43>> The flange portion 43 has a front flange portion 43A provided on the front side of the webbing bracket 40 and a rear flange portion 43B provided on the rear side. The flange portion 43 is bent from the plate portion 40A so as to protrude outward in the seat width direction, in other words, toward the airbag module 10 side.

[0050] <<First Through Hole 44 and Second Through Hole 45>> Further, in the webbing bracket 40, a first through hole 44 and a second through hole 45 are formed at a position spanning the first slit 41. Specifically, the first through hole 44 is formed on the upper side of the first bent portion 41C, and the second through hole 45 is formed on the lower side of the first bent portion 41C.

[0051] A first bolt 13A and a second bolt 13B provided on the inflator 12 included in the airbag module 10 are attached to the first through hole 44 and the second through hole 45, respectively. As shown in FIG. 2, the first bolt 13A extends from the inflator 12 toward the inside in the seat width direction, and is fastened by a nut 15 while being inserted through the first through hole 44 and a through hole formed in the protrusion 21 of the side frame 20. 5, a first protrusion 21A and a second protrusion 21B aligned vertically are formed on the side plate of the side frame 20. The first protrusion 21A and the second protrusion 21B are both parts that protrude to the outside of the seat on the side plate of the side frame 20. A first through hole 22A and a second through hole 22B are formed in the center of the first protrusion 21A and the second protrusion 21B, respectively. The first through hole 44 of the webbing bracket 40 is positioned opposite the first through hole 22A of the first protrusion 21A, and the second through hole 45 of the webbing bracket 40 is positioned opposite the second through hole 22B of the second protrusion 21B. Then, a webbing bracket 40 is placed between the side frame 20 and the airbag module 10, and the first bolt 13A extending from the inflator 12 is inserted into the first through hole 22A, and the second bolt 13B is inserted into the second through hole 22B, and nuts 15 are screwed onto the first bolt 13A and the second bolt 13B, respectively, to fasten them together. As a result, the airbag module 10, the webbing bracket 40, and the side frame 20 are fastened together. At this time, as shown in FIG 2, the webbing bracket 40 is supported in a state in which it abuts against the protrusions 21 (first protrusion 21A, second protrusion 21B) of the side frame 20.

[0052] Here, the positional relationship between the first holding portion 41B, the second holding portion 42B, the first through-hole 44, and the second through-hole 45 will be described. As shown in FIG. 6, a line segment L connecting the first through hole 44 and the second through hole 45 is substantially parallel to the first holding portion 41B and the second holding portion 42B. Further, the first holding portion 41B and the second holding portion 42B are formed at positions overlapping with a line segment L connecting the first through hole 44 and the second through hole 45 in the up-down direction. Further, a line segment L connecting the first through hole 44 and the second through hole 45 is located between the first retaining portion 41B and the second retaining portion 42B. In other words, the first through hole 44 and the second through hole 45 are provided between the first retaining portion 41B and the second retaining portion 42B in the front-rear direction of the seat.

[0053] <<Bolt fastening part 46>> Next, the bolt fastening portion 46 will be described. 6 and 7, a bolt fastening portion 46 is provided below the second slit 42. Here, the bolt fastening portion 46 has a notch portion 46A that is closed on the upper side and open on the lower side. Then, as shown in Figures 4 and 5, the webbing bracket 40 can be fixed to the side frame 20 by fastening a bolt 16 through the cutout portion 46A of the bolt fastening portion 46 and the third through hole 23 formed in the side frame 20. In this embodiment, the webbing bracket 40 is fastened to the side frame 20 at three points: the first bolt 13A and the second bolt 13B extending from the inflator 12, and the bolt 16. This makes it possible to firmly attach the webbing bracket 40 to the side frame 20.

[0054] In addition, the plate portion 40A and the bolt fastening portion 46 are misaligned in the seat width direction. In other words, the bolt fastening portion 46 is disposed on the inner side in the seat width direction with respect to the plate portion 40A. Specifically, a step portion 47 that is inclined in the seat width direction is formed between the plate portion 40A and the bolt fastening portion 46. The plate portion 40A is supported by a protrusion 21 that protrudes outward in the seat width direction from the side frame 20, so that a part of the plate portion 40A is spaced apart from the side frame 20. As shown in FIG. 6, the bolt fastening portion 46 is provided below the first slit 41 and the second slit 42.

[0055] <Installation of the airbag module 10> Next, the installation process of the airbag module 10 will be described. 7, the first webbing 30 and the second webbing 35 are attached to the webbing bracket 40. Specifically, the ring-shaped first locking portion 31 of the first webbing 30 is passed through the first slit 41 of the webbing bracket 40, and the first locking portion 31 is locked to the first retaining portion 41B. Similarly, the second locking portion 36 of the second through-hole 45 is passed through the second slit 42 of the webbing bracket 40, and the second locking portion 36 is locked to the second retaining portion 42B.

[0056] Next, the webbing bracket 40 to which the first webbing 30 and the second webbing 35 are attached is attached to the side frame 20. Specifically, the bolts 16 are attached to the bolt fastening portions 46 to attach the webbing bracket 40 to the side frame 20.

[0057] Next, the airbag module 10 is attached to the webbing bracket 40. Specifically, the first bolt 13A and the second bolt 13B protruding from the inflator 12 of the airbag module 10 are passed through the first through-hole 44 and the second through-hole 45 of the webbing bracket 40 and fastened by nuts 15 from the inside of the side frame 20. This causes the airbag module 10, the webbing bracket 40, and the side frame 20 to be fastened together.

[0058] Next, the padding 1 is placed in front and on the sides of the airbag module 10, and further the covering material 2 is placed to cover the padding 1. Here, the padding 1 is provided with a breaking portion 50 at a location located on the seat outer side and slightly forward of the airbag module 10. For example, the breaking portion 50 is a portion where a slit is formed in the padding 1 in the vertical direction. Then, at the breaking portion 50, the breaking portion side end 32 of the first webbing 30, the breaking portion side end 37 of the second webbing 35, and the end of the skin material 2 are sewn together in a pulled-in state. The breaking portion side end 32 is the end of the first webbing 30 opposite the first fastening portion 31. Similarly, the breaking portion side end 37 is the end of the second webbing 35 opposite the second fastening portion 36.

[0059] When the inflator 12 of the airbag module 10 is activated, gas generated by the inflator 12 is injected into the bag body 11, causing the bag body 11 to inflate. At this time, the bag body 11 is guided so that the deployment direction is toward the breaking portion 50 by the webbing bracket 40 disposed on the inside of the seat, the first webbing 30 serving as an inner side webbing attached to the breaking portion 50 and the first retaining portion 41B of the webbing bracket 40, and the second webbing 35 serving as an outer side webbing attached to the breaking portion 50 and the second retaining portion 42B of the webbing bracket 40. Specifically, as the bag body 11 expands, the first force cloth 30 and the second force cloth 35 act to tear the breaking portion 50, causing the bag body 11 to break the breaking portion 50 and bulge from the breaking portion 50 toward the outside of the sheet.

[0060] As described above, in the seat S, the first retaining portion 31 of the first retaining portion 31 of the first retaining portion 36 of the second retaining portion 35 of the second retaining portion 35 can be easily attached to the retaining portion bracket 40 by passing the first slit 41 and the second slit 42 of the retaining portion bracket 40.

[0061] <Modifications of the Webbing Bracket 40> Next, first to fourth modified examples of the webbing bracket 40 will be described with reference to Figs.

[0062] Fig. 8 shows a webbing bracket 140 according to a first modified example. As shown in Fig. 8, the webbing bracket 140 according to the first modified example differs from the webbing bracket 40 in that a third through hole 48 and a fourth through hole 49 are further formed in the plate portion 40A, but is the same in other respects.

[0063] The third through hole 48 and the fourth through hole 49 may be used to pass a bolt through and fasten the webbing bracket 40 to the side frame 20, or may be used in place of the first through hole 44 and the second through hole 45 when attaching the airbag module 10.

[0064] Fig. 9 shows a weaving bracket 240 according to the second modified example. As shown in Fig. 9, the weaving bracket 240 according to the second modified example differs from the weaving bracket 40 in that a hole 46Xa is formed in the bolt fastening portion 46X instead of a notch 46A, but is the same in other respects. The bolt 16 is passed through this hole 46Xa, similarly to the webbing bracket 40. This allows the webbing bracket 240 to be attached to the side frame 20.

[0065] Fig. 10 shows a webbing bracket 340 according to a third modified example. As shown in Fig. 10, the webbing bracket 340 according to the third modified example differs from the webbing bracket 40 in that the notch formed in the bolt fastening portion 46Y opens rearward, but is the same in other respects. The bolt 16 is passed through this bolt fastening portion 46Y, similarly to the webbing bracket 40. This allows the webbing bracket 340 to be attached to the side frame 20.

[0066] Fig. 11 shows a weaving bracket 440 according to the fourth modified example. As shown in Fig. 11, the weaving bracket 440 according to the fourth modified example differs from the weaving bracket 40 in that the notch formed in the bolt fastening portion 46Z opens forward, but is the same in other respects. The bolt 16 is passed through this bolt fastening portion 46Z, similarly to the webbing bracket 40. This allows the webbing bracket 440 to be attached to the side frame 20.

[0067] Fig. 12 shows a weaving bracket 540 according to the fifth modified example. As shown in Fig. 12, the weaving bracket 540 differs from the weaving bracket 40 in that it does not have the bolt fastening portion 46 and the step portion 47 of the weaving bracket 40, but is the same in other respects. That is, the weaving bracket 540 is fastened to the side frame 20 at two points, the first through hole 44 and the second through hole 45.

[0068] Fig. 13 shows a webbing bracket 640 according to the sixth modified example. As shown in Fig. 13, the webbing bracket 640 differs from the webbing bracket 40 in that a bead portion 51 is formed instead of the step portion 47 in the webbing bracket 40, but is the same in other respects. The bead portion 51 is a portion recessed from the plate portion 40A toward the inside in the seat width direction, and is connected to the bolt fastening portion 46. Specifically, the bead portion 51 is formed on the upper portion of the cutout portion 46A of the bolt fastening portion 46. Then, the webbing bracket 640 is attached to the side frame 20 with the bead portion 51 and the bolt fastening portion 46 in contact with the side plate of the side frame 20. In this manner, rattling when the webbing bracket 640 is attached to the side frame 20 can be suppressed. Furthermore, by providing the bead portion 51, the rigidity of the webbing bracket 640 can be improved.

[0069] <Summary> The main features of the seat S according to this embodiment are as follows. [1] The seat S is a vehicle seat equipped with an airbag module 10 including a bag body 11. The seat S includes a frame member (e.g., a side frame 20) to which the airbag module 10 is attached, a first webbing 30 that guides the deployment direction of the bag body 11, and a webbing bracket 40 that is attached to the frame member and for fixing the first webbing 30. The first webbing 30 has a first engagement portion 31 formed in a ring shape, and the webbing bracket 40 has a first slit 41 for attaching the first webbing 30. The first slit 41 has a first opening 41A provided in a first edge portion 40B of the webbing bracket 40 and a first holding portion 41B that holds the first engagement portion 31 of the first webbing 30 that is passed through the first opening 41A. According to the above-mentioned sheet S, a portion of the first slit 41 for attaching the first webbing 30 in the webbing bracket 40 is open, so that the ring-shaped first engagement portion 31 of the first webbing 30 can be attached to the webbing bracket 40 through the first slit 41. That is, according to the above-mentioned sheet S, the webbing can be easily attached. The first webbing may be either an inner webbing or an outer webbing.

[0070] [2] In the above-described sheet S, the first slit 41 has a first bent portion 41C that connects the first opening 41A and the first holding portion 41B. This makes it possible to prevent the first webbing 30 from coming off the webbing bracket 40.

[0071] [3] In the above-described sheet S, the corners 41Aa of the first opening 41A are chamfered. This makes it possible to prevent the first webbing 30 from being damaged when the first webbing 30 is attached to the first slit 41.

[0072] [4] In the above-mentioned seat S, the webbing bracket 40 has a flange portion 43 formed along the first retaining portion 41B. This can improve the rigidity of the webbing bracket 40. This enables the webbing bracket 40 to stably hold the first webbing 30. In addition, by dispersing the contact points between the first engagement portions 31 of the first webbing 30 and the webbing bracket 40, it is possible to disperse the load on the first engagement portions 31. This makes it possible to suppress damage to the first webbing 30.

[0073] [5] In the above-mentioned sheet S, the flange portion 43 is longer than the first holding portion 41B. This can further improve the rigidity of the webbing bracket 40. This enables the webbing bracket 40 to hold the first webbing 30 more stably.

[0074] [6] In the above-mentioned sheet S, the flange portion 43 protrudes toward the airbag module 10. This can prevent the first webbing 30 from being damaged by the flange portion 43 of the webbing bracket 40 when the airbag is deployed.

[0075] [7] In the above-described sheet S, the first retaining portion 41B is formed linearly and is longer than the width of the first webbing 30. In this way, the first webbing 30 can be held by the webbing bracket 40 without causing wrinkles at the end of the first webbing 30.

[0076] [8] In the above-mentioned sheet S, the first bent portion 41C is connected between the upper and lower ends of the first holding portion 41B. This makes it possible to further prevent the first webbing 30 from coming off the webbing bracket 40.

[0077] [9] In the above-described seat S, the webbing bracket 40 has a first through hole 44 and a second through hole 45 formed in a position straddling the first slit 41 for mounting the airbag module 10. In this manner, by mounting the airbag module 10 at a position spanning the first slit 41, the first webbing 30 can be prevented from coming off the webbing bracket 40.

[0078]

[10] In the above-mentioned sheet S, the bolts 13 provided on the inflator 12 included in the airbag module 10 are attached to the first through-holes 44 and the second through-holes 45. By attaching the inflator 12 so as to block the first slit 41 in this manner, the first webbing 30 can be further prevented from coming off the webbing bracket 40.

[0079]

[11] In the above-described sheet S, the first holding portion 41B and the line segment L connecting the first through hole 44 and the second through hole 45 are substantially parallel to each other. In this way, by providing the first retaining portion 41B approximately parallel to the line segment L connecting the first through hole 44 and the second through hole 45, the force acting on the first engaging portion 31 of the first webbing 30 during airbag deployment can be distributed in a well-balanced manner, thereby enabling the airbag to be deployed stably.

[0080]

[12] In the above-described sheet S, the first retaining portion 41B is formed at a position overlapping with the line segment L connecting the first through hole 44 and the second through hole 45 in the up-down direction. This makes it possible to distribute the force acting on the first fastening portion 31 of the first webbing 30 in a well-balanced manner when the airbag is deployed, thereby enabling the airbag to be deployed in a more stable manner.

[0081]

[13] The above-mentioned seat S is provided with a second webbing 35 that guides the deployment direction of the bag body 11, the second webbing 35 having a second locking portion 36 formed in a ring shape, and the webbing bracket 40 having a second slit 42 for attaching the second webbing 35. The second slit has a second opening 42A provided in a second edge portion 40C of the webbing bracket 40, and a second retaining portion 42B that retains the second locking portion 36 of the second webbing 35 that is passed through the second opening 42A. In this way, the first webbing 30 and the second webbing 35 can be attached to one webbing bracket 40. This makes it possible to further stabilize the deployment direction of the airbag.

[0082]

[14] In the above-mentioned seat S, the first webbing 30 is an inner side webbing, the second webbing 35 is an outer side webbing, and the webbing bracket 40 has a bolt fastening portion 46 provided below the second retaining portion 42B. This makes it possible to further stabilize the direction in which the airbag deploys. Furthermore, by further forming the bolt fastening portion 46 on the webbing bracket 40, the mounting rigidity of the webbing bracket against outward pulling forces can be improved.

[0083]

[15] In the above-described seat S, the bolt fastening portion 46 is closed at the top and open at the bottom. Since the upper side of the bolt fastening portion 46 is closed in this manner, the positioning of the bolt 16 to be attached to the bolt fastening portion 46 can be facilitated.

[0084]

[16] In the above-described sheet S, the line segment L connecting the first through hole 44 and the second through hole 45 is located between the first holding portion 41B and the second holding portion 42B. This allows the first retaining portion 41B and the second retaining portion 42B to be disposed apart from the fastening point of the airbag module 10. This allows the first webbing 30 and the second webbing 35 to be pulled in opposite directions when the airbag is deployed, making it possible to cancel out each other's pulling forces. This prevents a strong force from being applied to the webbing bracket 40 when the airbag is deployed, and prevents the webbing bracket 40 from coming off when the airbag is deployed.

[0085]

[17] In the above-described seat S, the webbing bracket 40 has a step portion 47 formed between the bolt fastening portion 46 and the second retaining portion 42B. This makes it possible to prevent a strong pulling force of the first webbing 30 and the second webbing 35 from being applied to the bolt fastening portion 46. This prevents a strong force from being applied to the webbing bracket 40 when the airbag is deployed, thereby further preventing the webbing bracket 40 from coming off.

[0086] In the above-described seat S, the webbing bracket 40 is attached to the frame member by the bolt 13 of the inflator 12. The webbing bracket 40 is attached to the frame member at a bolt fastening portion 46 by using a bolt 16 different from the bolt 13 of the inflator 12. The frame member mentioned above is not limited to the side frame 20 but includes various members inside the seat S such as a metal frame, metal wires, and resin plates.

[0087] <Other embodiments> The present invention is not limited to the above-described embodiments. Although an example in which the airbag module 10 is attached to one side of the seat S has been shown, the airbag module 10 may be attached to both sides of the seat S. In this case, the side closest to the vehicle door is the near side airbag, and the side furthest from the vehicle door is the far side airbag.

[0088] Furthermore, the frame member to which the webbing bracket 40 is attached is not limited to the side frame 20. The webbing bracket 40 can also be attached to a frame member provided inside the vehicle. In this case, a webbing bracket 40 may be disposed between the frame member and the airbag module 10.

[0089] Further, other frame members may be disposed between the webbing bracket 40 and the side frame 20. Additionally, the webbing bracket 40 (as well as the other variations) may be entirely coated with nylon. [Explanation of symbols]

[0090] S Seat S1 Seat Back S2 Seat Cushion S3 Headrest 1. Pad material 2 Skin material 10 Airbag Module 11 Bag body 12 Inflator 13 Volts 13A 1st Bolt 13B Second bolt 15 Nut 16 Volts 20 Side frame 21 Convex 21A First protrusion 21B Second protrusion 22A 1st through hole 22B 2nd through hole 23 Third Through Hole 30 First power cloth (inner power cloth) 31 First locking portion 31A 1st sewing section 32 Fracture side end 35 Second power cloth (outer power cloth) 36 Second locking part 36A 2nd sewing section 37 Fracture side end 40 Webbing Bracket 40A plate part 40B First edge 40C 2nd edge 41 First Slit 41A 1st opening 41Aa Corner 41B 1st holding part 41Ba upper end 41Bb Lower end 41C 1st bending part 42 Second Slit 42A 2nd opening 42Aa Corner 42B 2nd holding part 42Ba upper end 42Bb Lower end 42C 2nd bending part 43 Flange 43A Front flange 43B Rear flange 44 First Through Hole 45 Second Through Hole 46 Bolt fastening section 46A Notch 46X Bolt joint 46Xa hole 46Y Bolt fastening part 46Z Bolt fastening section 47 Step 48 Third Through Hole 49 4th Through Hole 50 Breaking part 51 Bead section 140 Webbing Bracket 240 Webbing Bracket 340 Power Cloth Bracket 440 Webbing Bracket 540 Power Cloth Bracket 640 Power Cloth Bracket L line segment

Claims

1. A vehicle seat having an airbag module including a bag, a frame member to which the airbag module is attached; A first webbing that guides the deployment direction of the bag body; a webbing bracket attached to the frame member for fixing the first webbing; The first webbing has a first fastening portion formed in a ring shape, The webbing bracket is a first slit for attaching the first webbing; The first slit is a first opening provided in a first edge portion of the webbing bracket; a first retaining portion that retains the first engaging portion of the first webbing passed through the first opening.

2. 2. The vehicle seat according to claim 1, wherein the first slit has a first bent portion that connects the first opening and the first holding portion.

3. 3. The vehicle seat according to claim 1, wherein corners of the first opening are chamfered.

4. 4. The vehicle seat according to claim 1, wherein the webbing bracket has a flange portion formed along the first holding portion.

5. The vehicle seat according to claim 4, wherein the flange portion is longer than the first retaining portion.

6. 6. The vehicle seat according to claim 4, wherein the flange portion protrudes toward the airbag module.

7. 7. The vehicle seat according to claim 1, wherein the first retaining portion is formed linearly and is longer than a width of the first webbing.

8. 3. The vehicle seat according to claim 2, wherein the first bent portion is connected between upper and lower ends of the first support portion.

9. The vehicle seat according to any one of claims 1 to 8, characterized in that the webbing bracket has a first through hole and a second through hole for mounting the airbag module, the first through hole and the second through hole being formed in a position spanning the first slit.

10. 10. The vehicle seat according to claim 9, wherein a bolt provided on an inflator included in the airbag module is attached to the first through hole and the second through hole.

11. 11. The vehicle seat according to claim 9, wherein the first retaining portion is substantially parallel to a line segment connecting the first through hole and the second through hole.

12. 12. The vehicle seat according to claim 9, wherein the first retaining portion is formed at a position overlapping in the up-down direction with a line segment connecting the first through hole and the second through hole.

13. A second webbing is provided to guide the deployment direction of the bag body, The second webbing has a second engaging portion formed in a ring shape, The webbing bracket is a second slit for attaching the second webbing; The second slit is a second opening provided in a second edge portion of the webbing bracket; 10. The vehicle seat according to claim 9, further comprising: a second holding portion that holds the second fastening portion of the second webbing passed through the second opening.

14. The first webbing is an inner webbing, The second webbing is an outer webbing, The vehicle seat according to claim 13, wherein the webbing bracket has a bolt fastening portion provided below the second retaining portion.

15. 15. The vehicle seat according to claim 14, wherein the bolt fastening portion has an upper side that is closed and a lower side that is open.

16. 16. The vehicle seat according to claim 14, wherein a line segment connecting the first through hole and the second through hole is located between the first retaining portion and the second retaining portion.

17. 17. The vehicle seat according to claim 14, wherein the webbing bracket has a step portion formed between the bolt fastening portion and the second retaining portion.

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