JP2016013785A - Vehicle seat structure - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat structure which prevents interference between a belt guide and an expanding side air bag in a vehicle seat including the belt guide and a side air bag device.SOLUTION: An expansion guide member 6 attached to a vehicle width direction outer part of a seat frame 2 is disposed between a belt guide 4 and a side air bag device 5. A guide surface 7, which slidably contacts with an expanding side air bag to guide the side air bag to the outer side relative to the belt guide 4, is provided at the expansion guide member 6.

Description

  The technology disclosed herein relates to a vehicle seat structure including a side airbag device.

  Patent Document 1 describes a side airbag device provided with a guide surface that regulates the deployment direction thereof. In this side airbag device, an airbag module is attached to the door panel of the side door, and the upper portion projects toward the vehicle interior so as to guide the deployment of the side airbag that expands upward. A deployment guide member having an inclined surface is provided on the door panel. When the vehicle collides, the side airbag that expands and deploys upward is guided toward the vehicle interior side by being guided by the inclined surface of the deployment guide member attached to the upper portion thereof.

JP-A-5-139238

  By the way, the side part upper side of the vehicle seat, more specifically, the vicinity of the shoulder of the seated person seated on the seat, in the vicinity of the upper end of the vehicle width direction outer side part of the seat back, the waist part from the seated person's shoulder part There may be provided a belt guide for passing a seat belt extending obliquely thereover. By using such a belt guide, the positioning of the seat belt fed out from a predetermined seat belt device can be stabilized.

  When a side airbag device is to be combined with a vehicle seat having the belt guide as described above, the side airbag device is located below the belt guide at the outer side of the seat frame built in the seat back. It is conceivable to arrange them. In that case, the belt guide and the side airbag device are arranged side by side in the vertical direction so that the belt guide is on the upper side and the side airbag device is on the lower side in the outer portion of the seat. Therefore, when the side airbag device is activated and the side airbag is inflated upward, the side airbag is completely deployed, but the side airbag is being deployed while the belt guide and the belt are being There is a possibility of interference with the seat belt passed through the guide, and there is room for improvement.

  In addition to the belt guide described above, there may be a belt-related member related to the seat belt such as a retractor of the seat belt device on the upper side of the seat. Even in the case of combining the seat and the side airbag device, the side airbag and the belt-related member may interfere with each other as described above.

  The technology disclosed herein has been made in view of such points, and an object thereof is to provide a vehicle seat structure including a belt-related member and a side airbag device. It is to prevent interference with the member.

  The technology disclosed herein includes a seat frame, a belt-related member related to a seat belt device provided near a shoulder portion of a seated person at an outer portion in the vehicle width direction of the seat frame, and more than the belt-related member. The present invention relates to a vehicle seat structure including a side airbag device that includes a side airbag that is attached to the seat frame at a lower position and inflates upward.

  Between the belt-related member and the side airbag device, an expansion guide member attached to an outer portion of the seat frame is disposed.

  The inflation guide member has a guide surface that guides the side airbag outward in the vehicle width direction from the belt-related member by sliding contact with the inflating side airbag.

  According to this structure, the side airbag device attached to the lower side of the seat frame operates and the side airbag that is inflated upward is relatively positioned on the outer side of the seat frame. It is in sliding contact with the guide surface of the guide member attached upward. The side airbag slides along the guide surface, and the guide surface guides the side airbag being deployed outward in the vehicle width direction from the belt-related member. Interference with related members can be prevented.

  The belt-related member here includes a belt guide that guides the direction in which the seat belt is pulled out in the vicinity of the seated person's shoulder, and when the seat belt device is built in the seat, the retractor, etc. It can be included in the member.

  The guide surface may extend from the inner side toward the outer side in the vehicle width direction as it goes from the lower side toward the upper end.

  With this configuration, when the side airbag is inflated upward, the side airbag is guided along the guide surface so as to be directed outward in the vehicle width direction. In this way, the guide surface continuously extending from the lower side toward the upper end portion is positioned above the side airbag by continuously guiding the side airbag from the inner side to the outer side in the vehicle width direction. Interference with the belt-related member can be prevented more reliably.

  As described above, according to the vehicle seat structure, the side airbag that is inflated upward by the guide member disposed between the belt-related member and the side airbag device is the side airbag device. Since it is guided outward in the vehicle width direction with respect to the belt-related member provided above, interference with the belt-related member can be prevented.

(A) is a front view showing a schematic configuration of the entire vehicle seat in which the side airbag device is built, as viewed from the outside. FIG. 1B is a diagram corresponding to FIG. 1A schematically showing the internal configuration of the vehicle seat. It is a perspective view which shows the structure of the side airbag apparatus incorporated in the vehicle seat from the outside. (A) is a front view which shows roughly the structure around an expansion guide member, (b) is a side view which shows it seeing from the side. It is a side view which shows roughly the state which the side airbag apparatus act | operated and expand | deployed.

  Hereinafter, an embodiment of a vehicle seat will be described based on the drawings. Note that the following description of the preferred embodiment is merely illustrative.

  The vehicle seat S is installed on the floor of the vehicle so that an occupant (a seated person) can sit there. A vehicle seat S shown in FIG. 1 and the like is a seat installed on the right side in the vehicle interior, and the left side of FIG. 1 corresponds to the outside in the vehicle width direction, and the right side of the page corresponds to the inside in the vehicle width direction. In the following description, an embodiment of a vehicle seat will be described using the seat installed on the right side as an example. However, the configuration of the vehicle seat disclosed herein can be applied to each seat installed in the vehicle interior. It is.

  As shown in FIG. 1A, the vehicle seat (hereinafter also simply referred to as “seat”) S is entirely covered with a skin 1 made of, for example, a synthetic resin. As shown in FIG. 1B, a seat frame 2 as a skeleton of the entire seat, and a net-like net sheet 3 that is stretched inside the seat frame 2 and supports the back surface of the seated person are provided. Although not shown, the vehicle seat S is further formed of a cushioning material (for example, a cushioning material made of synthetic resin), and supports the region from the side of the seated person's waist to the shoulder from the side. A pair of left and right side pads configured to do so are housed.

  The seat frame 2 is composed of a frame main body 2a composed of a pipe-shaped steel material and a substantially rectangular plate-shaped steel material, and is fixed to the outer side of the frame main body 2a so as to extend from the lower side to the center. A pair of side frames 2b, 2b is provided.

  In this seat, a seat back and a headrest are integrally configured. As shown in FIG. 1 (b), the frame body 2a extends from the top of the headrest portion to both sides in the vehicle width direction, and from there, It is continuous over both sides of the seat back in the vehicle width direction. In the frame main body 2a, both sides of the headrest portion in the vehicle width direction are configured to expand in the vehicle width direction from the top to the bottom. In the frame main body 2a, both sides of the seat back portion in the vehicle width direction are also configured such that upper portions thereof spread in the vehicle width direction from the top to the bottom. Thus, in the frame main body 2a, the portion corresponding to the boundary between the headrest portion and the seat back portion corresponds to the vicinity of the shoulder of the seated person, but is inclined so as to connect the headrest portion and the seat back portion to each other. Yes.

  Fasteners 8 and 8 that engage both side edges of the net seat 3 in the vehicle width direction are welded to the front edges of the side frames 2b and 2b. The fasteners 8 and 8 are formed to extend in the vertical direction along the side frames 2b and 2b so that the locking claws 8a, 8a and 8a locked to the net sheet 3 are arranged at equal intervals. Are integrally formed. The net sheet 3 locked to the side frames 2b, 2b in this way forms a support surface that supports the back of the seated person.

  Further, when the seat frame 2 is divided into left and right along the vehicle width direction, the seat frame 2 is located on the outer side (outside in the vehicle width direction) of the vehicle (in this embodiment, a side wall portion (not shown) in the vehicle interior). 1 (b) and FIG. 2, from the upper side to the lower side, a belt guide 4, a bracket 9 for fixing the belt guide 4, an expansion guide member 6, A side airbag device 5 is attached.

  Below, the structure of the member provided in the periphery of the seat frame 2 in the vehicle outer side is demonstrated.

  Specifically, the bracket 9 is attached to the upper side of the outer portion of the frame body 2a, more precisely, as described above, corresponding to the boundary between the headrest portion and the seat back portion and inclined. Yes. The bracket 9 is made of, for example, a bent steel plate, and as shown in FIG. 3A, the upper and lower ends thereof and the frame body 2a are fixed by welding. The upper end portion of the bracket 9 is joined to the upper portion of the inclined portion corresponding to the boundary between the headrest portion and the seat back portion in the frame main body 2a, and the lower end portion of the bracket 9 is lower than the inclined portion in the frame main body 2a. The upper end of the seat back part is joined. When the bracket 9 is fixed to the frame body 2a, the bracket 9 has a substantially "<"-shaped outer shape when viewed from the front, and extends from the upper end portion outwardly. Corresponding to the upper side of the "<" character) and the second inclined part 9b extending downward from the first inclined part 9a to the lower end (on the lower side of the "<" character) Correspondence). The inclination of the first inclined portion 9a of the bracket 9 is gentler than the inclination of the inclined portion of the frame body 2a, while the inclination of the second inclined portion 9b is steeper than the inclination of the inclined portion of the frame body 2a. Thereby, a gap is provided between the bracket 9 and the frame body 2a.

  As shown in FIG. 3A, the belt guide 4 is attached to the first inclined portion 9 a of the bracket 9. Here, as shown in FIG.2 and FIG.3 (b), in the 1st inclination part 9a of the bracket 9, the site | part except a welding location with the frame main body 2a becomes comparatively wide in the front-back direction of a vehicle. The belt guide 4 is attached to the first inclined portion 9a that is wide in the front-rear direction so as to be along an edge corresponding to the front side of the vehicle. The belt guide 4 is made of, for example, a synthetic resin and has a guide hole through which the seat belt B is inserted, and the seat belt B can pass through the upper portion thereof so that the seat belt B can be inserted into the guide hole. By providing a slit, it has a substantially upward C-shaped cross section. As shown in FIG. 1 (a), the belt guide 4 is exposed to the outside of the skin 1, near the boundary between the headrest portion and the seat back portion of the seat S, the outside in the vehicle width direction is down, and In addition to being disposed obliquely so that the inside in the vehicle width direction is upward, the hole shaft of the guide hole is disposed so as to be obliquely downward from the rear to the front of the vehicle. When the seat occupant wears the seat belt B, the guide hole is extended from a seat belt device (not shown) installed in the passenger compartment so as to support the front of the seat occupant (the seat occupant's shoulder). The seat belt B (which extends obliquely from the waist along the waist) is inserted. The belt guide 4 guides the withdrawal of the seat belt B.

  The side airbag device 5 includes a side airbag 5a in a folded form, an inflator 5b, and a cover 5c that covers the entire side airbag 5a and the inflator 5b.

  Specifically, the side airbag 5a is formed in a bag shape, and is attached to the side frame 2b inside the seat S in a state of being folded into a substantially column shape extending substantially along the vertical direction. As shown in FIG. 4, the side airbag 5a is configured so as to be deployed in a substantially C-shape (substantially crescent shape) by inflating forward or upward. When this happens, the seated person's head and trunk or abdomen are protected from the side wall of the passenger compartment.

  The inflator 5b is formed in a pipe shape extending along the vertical direction, and is attached to the side frame 2b. A gas supply port (not shown) provided in the inflator 5b communicates with the inside of the side airbag 5a and operates when a collision is detected to send gas to the inside of the side airbag 5a. .

  The cover 5c is, for example, a cloth member. In this embodiment, the cover 5c covers the entire side airbag 5a and the inflator 5b and is fastened with an adhesive tape (not shown). The adhesive force of the tape is adjusted so that it can be peeled off quickly as the side airbag 5a is inflated.

  The side airbag device 5 has a substantially columnar outer shape extending along the top and bottom when not in operation. The upper portion of the side airbag device 5 is inclined toward the inner side in the vehicle width direction as shown in FIGS. 1B and 3A, and the guide of the expansion guide member 6 described below is provided. It extends until it contacts the surface 7.

  An expansion guide member 6 is further attached to the outer side of the frame body 2a. As shown in FIGS. 3A and 3B, the expansion guide member 6 is a plate-like member extending substantially along the vertical direction, and is located between the side frame 2 b and the belt guide 4. Is attached. The upper portion of the expansion guide member 6 is supported from the back surface side by the second inclined portion 9 b of the bracket 9.

  The expansion guide member 6 is provided with a guide surface 7 extending so as to face outward (side wall portion of the passenger compartment). As shown in FIG. 3 (a), the guide surface 7 continuously extends from below toward the upper end. In this embodiment, the upper end is, as shown in FIG. 3 (b), When the sheet S is viewed from the front, it is connected to the side surface portion 4 a of the belt guide 4.

  Specifically, the guide surface 7 is continuous from the upper end portion of the seat back portion of the frame body 2a to the vicinity of the inclined portion corresponding to the boundary between the seat back portion and the headrest portion, and the lower portion of the guide surface 7 Are arranged so as to be substantially along the upper end of the seat back portion of the frame body 2a. On the other hand, as shown by an arrow A1 in FIG. 3 (a), the upper portion of the guide surface 7 moves up and down so as to move away from the inclined portion of the frame body 2a outward in the vehicle width direction as it approaches the upper end. It curves so as to draw a gentle arc along it (that is, it curves in a bow toward the inward direction of the sheet S).

  Further, as described above, the side airbag device 5 is in contact with the region around the boundary portion between the upper portion and the lower portion of the guide surface 7.

Further, as shown in FIG. 3A, the upper end portion of the guide surface 7 and the side surface portion 4a of the belt guide 4 are configured to be continuous with no substantial step. The side surface portion 4 a of the belt guide 4 is inclined outward in the vehicle width direction from the bottom to the top so as to extend the upper end portion of the guide surface 7.
On the other hand, the lower end portion of the guide surface 7 is configured to be continuous with the side surface portion of the side frame 2b. That is, the guide surface 7 is configured as a curved surface extending so as to span between the side surface portion of the side frame 2 b and the side surface portion 4 a of the belt guide 4.

  In addition, as shown in FIG. 3B, the guide surface 7 extends so as to maintain a substantially constant width from the lower end toward the upper end when the sheet S is viewed from the side. The portion of the bracket 9 corresponds to the width of the first inclined portion 9a of the bracket 9 in the vehicle front-rear direction. In this embodiment, the guide surface 7 is formed so as to be wider than the side surface portion 4 a of the belt guide 4 around the upper end portion thereof.

  Below, the action | operation of the side airbag apparatus 5 in the vehicle which installed the seat | sheet S which has the above structures is demonstrated.

  If a collision is detected, the inflator 5b supplies gas toward the inside of the side airbag 5a. The side airbag 5a is inflated by the supplied gas, peels off the adhesive tape, and is exposed from the cover 5c. The side airbag 5a exposed from the cover 5c continues to inflate forward or upward, breaks the seam of the skin 1 from the inside, and is exposed to the outside of the skin 1. The side airbag 5a slides along the guide surface 7 of the expansion guide member 6 when inflated upward. Since the upper portion of the guide surface 7 is curved and extends outward in the vehicle width direction from the lower side toward the upper end portion, the side airbag 5a that continues to inflate while sliding along this region is Along the extending direction of the guide surface 7, that is, along the direction indicated by the arrow A1 in FIG. Since the upper end portion of the guide surface 7 extends so as to be continuous with the side surface portion 4a of the belt guide 4, the side airbag 5a that has reached the upper end portion of the guide surface 7 by continuing to inflate is now the belt. By sliding along the side surface portion 4 a of the guide 4, the belt 4 is guided outward from the belt guide 4.

  As shown in FIG. 4, the side airbag 5a is finally deployed in a substantially C-shape so as to cover a portion from the seated person's head to the torso or abdomen from the side wall side of the passenger compartment. To do. The seated person is protected in cooperation with the seat belt B and the like.

  As described above, the side airbag 5a that is being inflated upward is guided outward from the belt guide 4 by sliding along the guide surface 7 of the inflation guide member 6. As shown in FIG. 3 (a), the belt guide 4 is arranged so that a gap is provided with respect to the frame body a at an inclined portion corresponding to the boundary between the headrest portion and the seat back portion. Although the side airbag 5a slides along the guide surface 7 while projecting outward in the width direction, the side airbag 5a, the belt guide 4, As a result, interference with the seat belt B inserted through the belt guide 4 can be prevented.

  In addition, since the guide surface 7 is configured as a curved surface that draws an arc along the top and bottom, when the side airbag 5a slides upward along the guide surface 7, the upper end portion of the guide surface 7 is viewed from below. The vehicle is smoothly guided from the inner side in the vehicle width direction toward the outer side in that direction.

  Further, since the upper end of the guide surface 7 and the side surface portion 4a of the belt guide 4 are configured to be continuous when viewed from the front, the airbag 5a being deployed is located at the upper edge of the guide surface 7. After reaching, this time, the belt guide 4 is guided to slide along the side surface portion 4a. Therefore, interference with the belt guide 4 and by extension, the seat belt B inserted through the belt guide 4 can be prevented.

  On the other hand, since the lower end portion of the guide surface 7 and the side surface portion of the side frame 2b are configured to be continuous, when the side airbag 5a is inflated, the boundary edge between the side frame 2b and the guide surface 7 is formed. Can be prevented from interfering with each other.

  Further, since the upper portion of the side airbag device 5 extends until it comes into contact with the guide surface 7, when the side airbag device 5 operates, the side airbag 5 a that expands upward is guided to the guide surface 7. It is advantageous for sliding along.

  Moreover, since the guide surface 7 spreads in a substantially fan shape from the lower side toward the upper end portion, the area where the guide surface 7 and the side airbag 5a come into contact when guiding the inflating side airbag 5a. Can be taken widely. Therefore, since the outward guidance of the side airbag 5a is stabilized by the amount that is widely taken, the belt guide 4 and the seat belt B inserted through the belt guide 4 and the side airbag 5a are in contact with each other. It is possible to reduce the possibility of the occurrence.

In addition, since the width on the lower end side of the guide surface 7 is made narrower than the upper end side, the contact area between the inflated side airbag 5a and the region on the lower end side of the guide surface 7 is reduced by the narrowed portion. Become. Therefore, the force that the inflated side airbag 5a pushes the guide surface 7 and the side frame 2b inward in the vehicle width direction is reduced.
<Other embodiments>
In this embodiment, the guide surface 7 is configured as a curved surface that draws an arc along the top and bottom, but this configuration is not essential. For example, it can also be comprised from the plane inclined so that it might go outward from the inner side of a vehicle width direction as it goes to an upper end part from a lower end part.

  From the relationship between the shape of the frame body 2a and the arrangement of the belt guide 4, the guide surface 7 extends from the inner side toward the outer side in the vehicle width direction from the lower side toward the upper end part. It is changed according to the shape of the frame body 2 a and the arrangement of the belt guide 4. For example, both sides in the vehicle width direction of the seat back portion of the frame body 2a are configured to have substantially the same width in the vehicle width direction from the top to the bottom, and the belt guide 4 is configured to have a In a configuration in which the guide surface 7 is arranged so as not to protrude outward in the direction, the guide surface 7 can be configured to be a flat surface extending flatly from the side frame 2 b to the outside of the belt guide 4.

  Furthermore, although the upper end part of the guide surface 7 and the side part 4a of the belt guide 4 are continuing, this structure is not essential. For example, the upper end side of the guide surface 7 may be bent further outward than the side surface portion 4 a of the belt guide 4.

  In this embodiment, in order to support the back of the seated person, the net sheet 3 formed in a net shape is provided, but this configuration is not essential. For example, you may comprise so that a seated person's back part may be supported by the cushion material formed in plate shape.

  In this embodiment, the belt guide 4 has been described for inserting the seat belt B fed from the seat belt device installed in the vehicle interior. However, in addition to this, for example, for a vehicle incorporating a seat belt device The seat can also be configured as an opening through which the seat belt B is drawn out from the inside of the seat.

  Further, in the vehicle seat incorporating the seat belt device, in the configuration in which the retractor as the belt-related member is disposed on the upper side of the seat back in the vehicle width direction, the guide surface of the expansion guide member is more than the retractor. Alternatively, the deployment of the side airbag may be guided by directing outward in the vehicle width direction.

  Further, the vehicle seat structure disclosed herein is not limited to being applied to a seat in which a headrest and a seatback are integrated, but can also be applied to a seat in which the headrest and the seatback are separated.

  Further, the deployed shape of the side airbag 5a is not limited to the shape shown in this embodiment. It is sufficient that it is configured to expand at least upward.

S vehicle seat 2 seat frame B seat belt 4 belt guide 5 side airbag device 5a side airbag 6 inflation guide member 7 guide surface

Claims (2)

A seat frame,
A belt-related member related to a seat belt device provided near the shoulder of a seated person in the vehicle width direction outer side of the seat frame;
A vehicle seat structure including a side airbag device configured to include a side airbag attached to the seat frame and inflated upward at a position lower than the belt-related member;
Between the belt-related member and the side airbag device, an expansion guide member attached to an outer portion of the seat frame is disposed,
The inflating guide member has a guide surface that guides the side airbag toward the outer side in the vehicle width direction than the belt-related member by sliding contact with the inflating side airbag. Vehicle seat structure. The vehicle seat structure according to claim 1,
The vehicle seat structure according to claim 1, wherein the guide surface extends from the inner side toward the outer side in the vehicle width direction from the lower side toward the upper end portion.

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