JP2023111987A - Vehicular seat - Google Patents

Abstract

To provide a vehicular seat that comprises a first surface skin fixed to a pad and a second surface skin, attachably and detachably connected through a connector to the first surface skin, which covers a part of the pad directly or indirectly through the first surface skin, and further has an airbag module arranged in a frame, which can avoid the connector from contacting and interfering with the airbag when expanding the airbag, so as to secure appropriate operation of the airbag.SOLUTION: A frame 20 is provided with an airbag module AM in which an airbag 52 that can be expanded outward more than a surface of a pad P2 is stored. A fracture tolerance section m1 that can be fractured to tolerate expansion of the airbag 52 is arranged on at least either one of first and second surface skins 25 and 26 at an interval from connectors f1-f4.SELECTED DRAWING: Figure 5

Description

The present invention provides a vehicle seat, particularly a pad, a frame that supports the back surface of the pad, a first skin that is fixed to the pad and covers the surface of the pad, and is detachably connected to the first skin via a connector. The present invention relates to a vehicle seat provided with a second skin that covers part of the surface of the pad directly or via the first skin.

In the vehicle seat described above, there is an advantage that the second skin can be replaced with another second skin at any time and exchanged with respect to the first skin as required. A vehicle seat having such an easy-to-remove upholstery is conventionally known, for example, as shown in Patent Document 1. In the known seat, a fastener is used as a joint between the first and second upholstery. ing.

Further, in a vehicle seat, a frame supporting the back surface of the pad is provided with an airbag module for accommodating an airbag that can be deployed outward from the surface of the pad, as disclosed in Patent Document 2, for example. It is publicly known.

JP 2016-97275 A JP 2015-20457 A

It is not assumed that a conventional vehicle seat with an easily attachable/detachable skin as in Patent Document 1 is applied to a seat with an airbag as in Patent Document 2, but if it is applied, the first , If the connector (for example, fastener) between the second skins and the portion where the airbag starts to deploy from the pad surface are close enough to overlap, the contactor may easily interfere with the airbag in the initial stage of deployment. be.

SUMMARY OF THE INVENTION It is an object of the present invention to provide a vehicle seat capable of solving the above problems.

In order to achieve the above object, the present invention provides a pad, a frame supporting the pad from the back side, a first skin fixed to the pad and covering the surface of the pad, and a connector attached to the first skin. and a second skin that is detachably connected via and covers a part of the surface of the pad directly or via the first skin, wherein the frame includes: An airbag module is provided for accommodating an airbag that can be deployed in the forward direction, and at least one of the first and second skins has a breakable portion that can be broken so as to allow the deployment of the airbag. is spaced from the connector.

Moreover, in addition to the 1st characteristic, this invention makes it 2nd characteristic that the said break|rupture allowance part is provided in the said 1st skin.

In addition to the second feature, the present invention has a region on the first skin that overlaps the second skin, and the breakage allowance part is provided in the first skin outside the region. This is the third feature.

Further, in addition to the second feature, the present invention has a region on the first skin that overlaps the second skin, and the first breakage allowance part is provided in the first skin in the region. A fourth feature is that the second skin is provided with a second breakable portion that overlaps the first breakable portion.

Further, according to the present invention, in addition to the first or second feature, the pad and the frame are a back pad and a side frame in a seat back portion that supports the back of the occupant, and the breakage permitting portion is the airbag. A fifth feature is that it is spaced in the front-rear direction of the seat back portion from the specific connecting device positioned around the module.

Further, in addition to the second feature, the present invention is characterized in that a portion of the first skin or the second skin adjacent to a specific connector positioned around the airbag module has the airbag at the time of deployment. A sixth feature is that a contact suppressing portion that suppresses contact with the specific connector is provided along the specific connector.

In addition to the sixth characteristic of the present invention, the contact suppressing portion is configured by an outward protruding portion protruding outward from the surface of the epidermis on which the contact suppressing portion is provided, and the outward protruding portion is higher than the projection height of the specific connector.

In addition to any one of the first to seventh features, the present invention is characterized in that the pad includes a retraction groove for retracting at least a part of the first skin out of the first and second skins, and the retraction groove. a lead-in hole having one end open at the bottom of the groove and the other end open at the rear surface of the pad, and a connecting member in which the portion of the first skin that is led into the lead-in groove penetrates the lead-in hole The other end of the connecting member is connected directly or via a support member to the inner surface of the frame, and the airbag module is attached to the frame so as to avoid the connecting portion. The eighth feature is that the

In addition to the eighth feature, the present invention is a ninth feature, wherein the attached portion of the airbag module attached to the frame is disposed on the opposite side of the connecting portion with the frame interposed therebetween. Characterized by

In addition to the ninth feature of the present invention, the plate-shaped wall portion sandwiched between the attached portion and the connecting portion of the frame has a recess recessed toward one side in the thickness direction of the wall portion. A tenth feature is that it has a curved portion.

In the present invention, the term "breakable portion" refers to a fragile portion that is provided in the skin in advance to allow the deployment of the airbag, and that can be broken by the airbag at the initial stage of deployment.

In the present invention, when the other end of the connecting member is directly connected to the inner surface of the frame, the term "connecting portion" refers to the connecting portion between the other end of the connecting member and the inner surface of the frame. When the other end of the connecting member is connected to the inner surface of the frame via the support member, it refers to the connecting portion between the support member and the inner surface of the frame.

According to the first feature, the first skin is fixed to the pad, and the second skin is detachably connected to the first skin via a connector and covers a portion of the pad directly or via the first skin. wherein at least one of the first and second skins has a rupturable rupture to allow the deployment of the airbag, in the vehicle seat provided with the airbag module on the frame Since the allowable portion is spaced apart from the connector, it is possible to effectively prevent the connector between the first and second skins from contacting and interfering with the airbag at the initial stage of deployment of the airbag. This is advantageous in ensuring accurate operation of the

According to the second feature, since the breakable portion is provided on the first skin fixed to the pad, it is possible to effectively prevent the breakable portion from slipping with respect to the pad, thereby stabilizing the operation of the airbag. can be made

Further, according to the third feature, even if there is a region on the first skin that overlaps the second skin, the breakable portion of the first skin is arranged outside the region, so the airbag deploys. There is no possibility that the airbag will be obstructed by the second skin, which is advantageous in ensuring accurate operation of the airbag.

According to the fourth feature, even if there is a region overlapping the second skin on the first skin and the first breakage allowance is arranged in this region, the first breakage allowance overlaps with the first breakage allowance. Since the second breakage permitting portion is provided on the second skin, there is no fear that the second skin will hinder the deployment operation of the airbag, which is advantageous in ensuring accurate operation of the airbag.

According to the fifth feature, in the seat back portion, the breakage permitting portion is spaced in the front-rear direction of the seat back portion from the specific connector positioned around the airbag module, so that the airbag can be To effectively prevent contact and interference between this and a connecting tool even if a breakage permitting part is broken and deployed obliquely to the front outside of a seat back part, and to ensure accurate operation of an airbag for a seat back part. more advantageous over

According to the sixth feature, the portion of the first skin or the second skin adjacent to the specific connector is provided with a contact suppressing portion that suppresses contact between the airbag and the specific connector during deployment. However, since it is provided along the specific connector, even if the breakage permitting portion is located relatively close to the specific connector, the contact suppressing portion prevents contact between the airbag and the connector during deployment. Therefore, the airbag can be deployed and operated more accurately.

According to the seventh feature, the contact suppressing portion is composed of an outward projecting portion projecting outward from the surface of the skin on which it is provided, and the projecting height of the outward projecting portion is the specified Therefore, the contact between the airbag and the connecting device during deployment can be effectively achieved with a simple structure that only provides an outwardly projecting portion on the surface of the first or second skin. can be suppressed.

According to the eighth characteristic, the pad has a lead-in groove for drawing in a portion of the first skin, and a lead-in hole having one end opened at the bottom of the lead-in groove and the other end opened at the rear surface of the pad. The part of the first skin that is drawn into the groove is connected to one end of a connecting member passing through the drawing hole, and the other end of the connecting member is connected to the inner surface of the frame directly or via a support member. In addition, since the airbag module is attached to the frame so as to avoid the connecting portion, in order to simplify the seat structure, the connecting member for pulling in the skin is connected to the common frame and the airbag module is attached. Even so, there is no risk of interfering with the operation of the airbag.

According to the ninth feature, the mounted portion of the airbag module to be mounted to the frame is arranged on the opposite side of the connecting portion with respect to the frame, so that the connecting portion and the mounted portion of the airbag module and can be compactly opposed to each other with the frame interposed therebetween.

According to the tenth feature, the plate-like wall portion of the frame sandwiched between the connection portion and the portion to which the airbag module is attached is a recessed portion recessed toward one side in the thickness direction of the wall portion. Therefore, the concave curved portion exerts a reinforcing rib effect, which makes it possible to increase the rigidity of the frame (especially the plate-like wall portion) while reducing the weight of the frame structure. Each mounting rigidity of the connecting member and the airbag module can be increased.

1 is an overall perspective view showing an automobile seat according to a first embodiment of the present invention; FIG. (A) is a perspective view showing a state in which the easy-to-remove upholstery is removed from the base upholstery in the seat portion and seat back portion of the seat, and (B) is a perspective view of the seat pad and the back pad before attaching the base upholstery. The perspective view which shows the state which removed the back pad in the seat back part, and exposed the back frame. 4-4 line enlarged sectional view of FIG. 5-5 line enlarged sectional view of FIG. 6-6 line enlarged sectional view of FIG. (C) is a perspective view of the seatback viewed from the front outside (that is, the airbag installation side), and (D) is a perspective view of the back pad viewed from the front outside as well. FIG. 6 is a cross-sectional view corresponding to FIG. 5 schematically showing an example of an airbag deployment process, in which (E) shows the initial state of airbag deployment, and (F) shows the state of completion of deployment of the airbag; FIG. 5 corresponding cross-sectional view showing a second embodiment of the present invention FIG. 5 corresponding cross-sectional view showing a third embodiment of the present invention FIG. 10 is a cross-sectional view schematically showing an example of the deployment process of the airbag according to the third embodiment, (G) corresponding to FIG. 8 (E) and (H) corresponding to FIG. 8 (F);

An embodiment of the present invention will be described below based on the accompanying drawings. In the present specification, the front, rear, left, right, and top and bottom refer to the front, rear, left, right, and top and bottom, respectively, as seen from the passenger sitting on the seat.

First, a first embodiment will be described with reference to FIGS. 1 to 8. FIG. An automobile seat S as a vehicle seat includes a seat portion S1 that supports the buttocks of an occupant from below, a seat back portion S2 that supports the back of the occupant from behind, and is mounted above the seat back portion S2. and a headrest portion S3.

In the illustrated example, the driver's seat is shown, but the front passenger's seat is basically the same as the driver's seat except that the airbag module AM, which will be described later, is arranged in the opposite direction. be.

The seat portion S1 includes a seat portion pad P1, a seat portion frame F1 that supports the seat portion pad P1 from the back side, and a seat portion covering C1 that covers the surface of the seat portion pad P1. The seat frame F1 is supported on the vehicle body floor 30 so that its front-rear position can be adjusted via a conventionally known front-rear position adjusting mechanism (not shown).

On the other hand, the seat back portion S2 includes a back pad P2, a back frame F2 that supports the back pad P2 from the back side, and a seat back skin C2 that covers the surface of the back pad P2. The back frame F2 is supported on the rear part of the seat frame F1 via a conventionally known reclining mechanism 32, and the reclining mechanism 32 allows the seat back S2 to be arbitrarily adjusted and fixed in its standing angle. ing.

Next, a specific structure of the seatback portion S2 will be described.

As shown in FIG. 3, the back frame F2, which is the skeleton frame of the seat back portion S2, includes a pair of left and right side frames 20, 20 extending in the vertical direction, and a pair of upper and lower portions of the side frames 20, 20. It is composed of a metal frame provided with upper and lower cross members 21, 22 extending in the left-right direction to be connected to each other, and a headrest support frame portion 23 integrally connecting the upper end portions of both side frames 20, 20. be.

The frame upper portions 20a of the left and right side frames 20 and the headrest support frame 23 are composed of a continuous pipe member formed in an inverted U shape. Each side frame 20 includes a frame upper portion 20a made of a portion of the pipe material, and a plate-like frame main portion 20b which is joined (eg, welded) to the upper end portion of the frame upper portion 20a and extends vertically. The frame main portion 20b is composed of a channel material having a U-shaped cross section that is open toward the center of the seat, and the front-to-rear width of the channel material gradually increases as it approaches the joint (i.e., the lower end) with the seat frame F1. It is formed so that it expands to increase the rigidity strength.

A concavely curved portion 20ba extending vertically by being concaved to one side in the thickness direction, i.e., the lateral direction (the seat inner side in the embodiment) is formed integrally with the widthwise intermediate portion of the frame main portion 20b. The rigidity and strength of the main frame portion 20b (therefore, the side frame 20) is enhanced by the concave curved portion 20ba exerting a reinforcing rib effect.

On the inner surface of each side frame 20 (specifically, the concavely curved portion 20ba of the frame main portion 20b and the frame upper portion 20a), a plurality of support members 41 made of corrugated bars with crests and troughs arranged alternately are provided. are joined (for example, welded) to each other. This support member 41 is used to engage and connect pull-in connection members J1 and J2 of a seatback cover C2, which will be described later. The shape structure of the support member 41 is not limited to that of the embodiment, and for example, a band plate material bent into a wave shape may be used.

A pressure plate 24 made of synthetic resin or metal is installed on the upper and lower cross members 21 and 22 of the back frame F2 via a pair of left and right wires 28 and 28 that are stretched between the cross members 21 and 22. Supported. Further, at least one wave spring 29 that supports the lower back surface of the pressure receiving plate 24 is horizontally supported between the left and right side frames 20 , 20 . The pressure receiving plate 24, wave spring 29 and wire 28 cooperate with each other to support the back pad P2 from the back side.

Next, the structure of the back pad P2 will be explained. The back pad P2 includes a main back pad P2M forming the main part of the back pad P2, and a flat cover pad P2C covering the outside of the airbag module AM, which will be described later. As shown in FIG. 2, the main back pad P2M, which is formed of urethane foam) into a predetermined shape, includes a pad main body P2m whose front surface serves as a support surface for the back of the occupant, and a pad main body P2m which is connected to the left and right sides of the pad main body P2m and which extends forward. left and right raised pad portions P2s that protrude outward to support the outer side of the back, and the back sides of the left and right raised pad portions P2s are supported by the side frames 20 (see FIGS. 4 and 5). . The left and right raised pad portions P2s cover the front and rear end surfaces and the outer surface of the side frame 20, respectively.

Among the left and right raised pad portions P2s, the raised pad portion P2s on the outer side of the vehicle (for example, the right side of the seat S in the embodiment is for the driver's seat) has modules as shown in FIGS. An opening O is formed. An airbag module AM is accommodated in the module opening O, and the airbag module AM is fixed to the outer surface of the frame main portion 20b of the side frame 20 facing the opening O. As shown in FIG.

As is clear from FIGS. 5 and 7, the airbag module AM is housed in a box-shaped module case 50 that is flat in the vehicle width direction and extends along the outer surface of the frame main portion 20b. , a fixed inflator 51, an airbag 52 which can be rapidly inflated by high-pressure gas from the inflator 51, and a holding bag 53 which holds the airbag 52 in a folded state in normal times. The inflator 51 is actuated based on a detection signal from a collision sensor (not shown) that can detect the impact of a vehicle collision, and can supply high-pressure gas into the airbag 52 . Moreover, the holding bag 53 can be immediately broken by the inflation of the airbag 52 .

The module case 50 includes a flat dish-shaped case body 50m that opens outward of the vehicle, and a cover plate 50c that opens and closes the outer end opening of the case body 50m. It is fixed to the portion 20b with a plurality of sets of bolts b and nuts n.

The rear edge of the cover plate 50c is pivotably connected 50h to the rear edge of the opening of the case body 50m. The front edge of the cover plate 50c is detachably engaged with the front edge of the opening of the case body 50m in a state where the cover plate 50c closes the opening of the case body 50m. The locking portion 50k has such a locking structure that it can be easily unlocked by inflation of the airbag 52 to open the cover plate 50c.

By the way, on the front surface of the main back pad P2M, as shown in FIG. 2, there are first and second lead-in grooves g1 and g2 extending vertically at respective boundaries between the pad main body P2m and the left and right raised pad portions P2s, A third lead-in groove g3 extending in the left-right direction is recessed so as to allow the intermediate portions of the first and second lead-in grooves g1 and g2 to communicate with each other. Further, in the main back pad P2M, as shown in FIGS. 4 to 6, a plurality of lead-in holes P2h each having one end opened at the bottom surface of each of the lead-in grooves g1 to g3 and the other end opened at the rear surface of the main back pad P2M. are formed spaced apart from each other in the longitudinal direction of each of the lead-in grooves g1 to g3.

The seatback skin C2 includes a base skin 25 that is fixed to the back pad P2 and covers the outer surface of the back pad P2, and an easily removable skin 26 that covers the front surface of the base skin 25. - 特許庁As will be described later, the easily removable skin 26 is detachably connected to the base skin 25 via first to third fasteners f1 to f3 in the respective lead-in grooves g1 to g3. It is detachably connected to the base skin 25 via the fourth fastener f4.

The base skin 25 has a central base skin portion 25m covering the pad main body P2m and left and right base skin portions 25s covering the front and side front portions of the left and right raised pad portions P2s corresponding to the shape of the back pad P2. , and an outer peripheral base skin portion 25z that covers the entire outer peripheral surface of the back pad P2, and the base skin portions 25m, 25s, and 25z are sewn to each other so that the back pad is integrated as a whole. It covers P2. Only the outer peripheral base skin portion 25z of the base skin 25 is located in a region that does not overlap with the easily attachable/detachable skin 26, and is always exposed to the outside.

The rear half of the outer peripheral base skin portion 25z, particularly the left and right side portions, are fixed (for example, bonded) to the left and right raised pad portions P2s and the side frame 20 so as to wrap around their respective rear end surfaces, as shown in FIGS. In particular, the upper and lower side portions of the rear half of the outer peripheral base skin portion 25z are fixed (for example, adhered) to the upper and lower end portions of the pad main body P2m so as to wrap around their respective rear end surfaces.

A portion of the back surface of the seat back portion S2 that is difficult to be covered by the outer peripheral base skin portion 15z can be covered in a good appearance by attaching a cover member (not shown) to the back surface of the seat back portion S2.

5 and 7, a flat cover pad P2C facing the outer surface of the module case 50 (especially the cover plate 50c) is fixed ( For example, bonding).

Next, the retraction fixing structure of the base skin 25 to the back pad P2 will be described with reference to FIGS. 3 to 6. FIG. The sewn portions of the central base skin portion 25m and the left and right base skin portions 25s of the base skin 25 are set at positions corresponding to the first and second lead-in grooves g1 and g2, respectively. , J2 . . . penetrating the back pad P2 and the support member 41 described above. Specifically, it is connected to and supported by the inner surface of the concave curved portion 20ba) of the frame main portion 20b. On the other hand, the upper and lower intermediate portions of the center base skin portion 25m are drawn into the third drawing groove g3, and the drawing portion is engaged with the pressure receiving plate 24 via a plurality of connecting members J3 passing through the back pad P2. concatenated.

More specifically, front ends of a plurality of first and second connecting members J1, J2, . . . are fixed (for example, sewn), and the connecting members J1, J2, etc. are passed through a plurality of lead-in holes P2h, which are opened at intervals in the first and second lead-in grooves g1, g2, respectively. It reaches the rear surface of pad P2. Front ends of a plurality of third connecting members J3 extending in the front-rear direction are fixed (for example, sewn) to the upper and lower intermediate portions of the central base skin portion 25m, and the connecting members J3 are attached to the third lead-in groove g3. It reaches the rear surface of the back pad P2 through a plurality of lead-in holes P2h that are opened at intervals.

Each of the first to third connecting members J1 to J3 includes a member main body Ja formed in a band plate shape and extending in the front-rear direction, and a locking piece Jk coupled and fixed to the rear end portion of the member main body Ja. In this embodiment, the locking piece Jk is formed of a J-shaped hook body, and particularly the locking piece Jk of the first and second connecting members J1 and J2 is attached to the side frame as shown in FIGS. The support member 41 fixed to the support member 20 is engaged with and connected to the inward protruding portion 41i. On the other hand, the locking piece Jk of the third connecting member J3 engages with the through hole h1 of the pressure receiving plate 24 located at or near the opposite portion of the lead-in hole P2h that opens into the third lead-in groove g3, as shown in FIG. stop and connect.

In addition, when some of the lead-in holes P2h are located in the facing portion of the wire 28 or the wave spring 29 or in the vicinity thereof, the first to third connecting members J1 to J3 penetrating the lead-in holes P2h are locked. The piece Jk may be hooked and connected to the wire 28 or wave spring 29 .

Further, the locking pieces Jk of the first to third connecting members J1 to J3 are not limited to the hook bodies described above. It can be formed into various shapes that can be locked and connected. For example, the locking piece Jk may be configured by a clip body (not shown) having an elastically deformable hook portion at its tip.

Next, the easily attachable/detachable skin 26 will be specifically described. As shown in FIG. 2, the easy-to-remove skin 26 includes a central easy-to-remove skin portion 26m covering the central base skin portion 25m of the base skin 25, and left and right easy-to-remove skin portions 26s respectively covering the left and right base skin portions 25s. , and the easy-to-remove skin portions are sewn to each other, and the whole covers the front surface and left and right side front portions of the base skin 25 (that is, the area excluding the outer peripheral base skin portion 25z). .

Next, a connection structure between the easily attachable/detachable skin 26 and the base skin 25 will be described with reference to FIGS. 4 and 5. FIG.

That is, the sewn portions of the center base skin portion 25m and the left and right base skin portions 25s, which are drawn into the first and second lead-in grooves g1 and g2, respectively, have the inner sides of the first and second fasteners f1 and f2. The fastener pieces f1i and f2i are respectively fixed (sewn). In addition, first and second fasteners f1, f1 and f2 are attached to the sewn portions of the central easy-to-remove outer skin portion 26m and the left and right easy-to-remove outer skin portions 26s, which are similarly drawn into the first and second lead-in grooves g1 and g2, respectively. The outer fastener pieces f1o and f2o of f2 are respectively fixed (sewn, for example).

On the other hand, the inner fastener piece f3i of the third fastener f3 is fixed (for example sewn) to the front and rear intermediate portion of the center base skin portion 25m that is pulled into the third pull-in groove g3. Further, the outer fastener piece f3o of the third fastener f3 is fixed (for example sewn) to the front and rear intermediate portion of the easy-to-remove central skin portion 26m which is pulled into the third pull-in groove g3.

The first to third fasteners f1 to f3 are arranged such that the outer fastener pieces f1o to f3o and the inner fastener pieces f1i to f3i are separated from each other by sliders f1s to f3s in the first to third lead-in grooves g1 to g3, respectively. is detachably connected at will by sliding operation of .

Furthermore, the inner fastener of the fourth fastener f4 is attached to the sewn portion between the upper edge of the central base skin portion 25m and the outer edges of the left and right base skin portions 25s and the front edge of the outer peripheral base skin portion 25z. Piece f4i is fixed (eg sewn). Further, the outer fastener piece f4o of the fourth fastener f4 is fixed (for example sewn) to the upper edge portion and the left and right outer edge portions of the easy-to-remove outer skin 26 . The outer fastener piece f4o and the inner fastener piece f4i of the fourth fastener f4 are detachably connected to each other by sliding the slider f4s on the outer peripheral surface (that is, the upper surface and left and right side surfaces) of the back pad P2. be done.

The application functions of the sliders f1s to f4s described above are the same as those of the conventionally known linear fastener slider.

By the way, at the initial stage of inflation of the airbag 52, the locking portion 50k is automatically unlocked according to the change in inflation, and the cover plate 50c is swung outward around the pivotal connection 50h at the rear end. move. As a result, the airbag 52 can be inflated and deployed forward and outward of the vehicle through a gap (see FIG. 8(E)) formed between the cover plate 50c and the open end of the case body 50m. The gap or the portion adjacent to the outside of the gap and sandwiched between the right raised pad portion P2s and the cover pad P2C corresponds to the deployment start portion P2x of the airbag 52 from the surface of the back pad P2. .

In relation to the installation of the airbag 52 described above, the perimeter base skin portion 25z is provided with a breakable portion m1 that can be broken by the airbag 52 in the initial stage of deployment. In this embodiment, the rupture permitting portion m1 is located at a position corresponding to the deployment start portion P2x of the airbag 52 in the initial stage of deployment (that is, the deployment start portion P2x and (opposite position or near position).

The breakable portion m1 of the present embodiment is composed of a series of small holes perforated in the outer peripheral base skin portion 25z. The breakage allowance portion m1 is formed along the front edge, upper edge, and lower edge of the cover plate 50c so as to surround the cover plate 50c of the module case 50 (therefore, the cover pad P2C described above) somewhat broadly. Arranged literally. Moreover, the breakable portion m1 (and therefore the deployment start portion P2x) is separated from the fourth fastener f4 of the first to fourth fasteners f1 to f4 located around the airbag module AM (that is, spaced apart in the front-rear direction). are located).

The breakable portion m1 is not limited to the embodiment as long as it has a fragile structure that can be broken by the airbag 52 at the initial stage of deployment while ensuring cover strength that can withstand normal use in the outer peripheral base skin portion 25z. Various frangible structures can be employed. For example, instead of the perforation-like small hole group as described above, the pertinent portion of the outer peripheral base skin portion 25z is configured to be thinner than the other portions, or a cut is made in the portion to bisect it. It is also possible to use a structure in which the cut portion is sewn together at low strength (that is, easily torn) between both sides of the cut portion.

Therefore, the back pad P2 is an example of the pad of the present invention, and the back frame F2 is an example of the frame of the present invention. Also, the first to fourth fasteners f1 to f4 are examples of the connecting device of the present invention, and the fourth fastener f4 in particular is a specific connecting device located around the airbag module AM among the connecting devices of the present invention. An example.

Furthermore, the base skin 25 is an example of the first skin of the present invention, and the easily removable skin 26 is an example of the second skin of the present invention.

The seat pad P1 of the seat portion S1 is also covered with the seat cover C1 including the base cover 15 and the easy-to-remove cover 16. The structure for attaching this cover C1 to the seat pad P1 is This is the same as the mounting structure for attaching the back skin C2 to the back pad P2. For example, the upper surface of the seat pad P1 is provided with pull-in grooves g1' to g3' for pulling in the skin in the same way as the back pad P2. They are detachably connected by fasteners f1' to f4' similar to the fasteners f1 to f4 described above.

Next, operation of the first embodiment will be described. When assembling the seat S, the back pad P2 is attached to the back frame F2 before the seat back covering C2 is assembled, and the airbag module AM is attached to the outer surface of one side frame 20 of the back frame F2. be done. Then, from this state, the operation of assembling the seat back cover C2 to the back pad P2 is performed as follows.

Regarding the base skin 25 of the seat back skin C2, the outer peripheral base skin portion 25z, the central base skin portion 25m, and the left and right base skin portions 25s are sewn together, and the first to third portions are sewn to predetermined portions. A base skin unit is prepared in advance by sewing the connecting members J1 to J3 and the inner fastener pieces f1i to f4i of the first to fourth fasteners f1 to f4, and the base skin unit is put on the front surface of the back pad P2. put it like

From this state, partial skins of the base skin unit are retracted into the first to third retraction grooves g1 to g3 on the front surface of the back pad P2. Then, the first to third connecting members J1 to J3 connected to the lead-in portions are extended to the back side of the back pad P2 through the lead-in holes P1h. Of the extending ends, the locking pieces Jk of the first and second connecting members J1 and J2 are locked and connected to the inward projecting portion 41i of the support member 41 fixed to the inner surface of the side frame 20. The locking piece Jk of the third connecting member J3 is locked and connected to the through hole h1 of the pressure receiving plate 24 .

After that, the left and right side portions of the outer peripheral base skin portion 25z of the base skin unit are fixed to the left and right raised pad portions P2s and the side frames 20 so as to wrap around their respective rear end surfaces as shown in FIGS. In addition, the upper and lower side portions of the outer peripheral base skin portion 25z are fixed (for example, adhered) to the upper and lower end portions of the pad main body P2m so as to wrap around the rear end surfaces thereof.

Thus, the base skin unit including the base skin portions 25m, 25s, 25z of the base skin 25 is fixed to the seat pad P2 so as to cover it. In this case, when a part of the base skin 25 is retracted into the first to third retraction grooves g1 to g3, the first and second connecting members J1 and J2 are fixed to the inner surface of the side frame 20, and the supporting member 41 is fixed. , and the third connecting member J3 is retained and connected to the through-hole h1 of the pressure receiving plate 24. Therefore, the base skin 25 is not displaced, loosened, or wrinkled due to long-term use. etc. can be effectively prevented from occurring.

On the other hand, regarding the easy-to-remove upholstery 26 of the seatback upholstery C2, the central easy-to-remove upholstery part 26m and the left and right easy-to-remove upholstery parts 26s are sewn together, and the first to fourth fasteners are fastened to predetermined portions. An easily attachable/detachable skin unit is prepared in advance by sewing the outer fastener pieces f1o to f4o of f1 to f4. Then, the easily attachable/detachable skin unit is placed on the base skin 25 previously fixed to the seat pad P2, and at that time, the outer fastener pieces f1o to f3o of the first to third fasteners f1 to f3 and the outer fastener pieces f1o to f3o are placed. By sequentially connecting the inner fastener pieces f1i to f3i, a part of the easily attachable/detachable skin 26 is retracted into the first to third retracting grooves g1 to g3, respectively. After that, when the outer fastener piece f4 and the inner fastener piece f4i of the fourth fastener f4 are connected, the easily attachable/detachable skin 26 is partly pulled into the first to third retraction grooves g1 to g3, and the base skin 25 is pulled in. can be connected and fixed to When removing the easily attachable/detachable outer skin 26 from this state, the procedure described above is reversed.

Thus, the attachment of the seatback cover C2 to the back pad P2 is completed. When attaching the base skin 15 and the easy-to-remove skin 16 of the seat cushion C1 to the seat pad P1, the procedure for attaching the seat back cushion C2 can be used.

In the seat portion S1 and the seat back portion S2 having the above structures, the easily attachable/detachable skins 16 and 26 are attached to the base skins 15 and 25 fixed to the seat portion pad P1 and the back pad P2, respectively, by fasteners f1 to f4 and f1'. It can be easily attached and detached at any time by f4'. For this reason, the easy-to-remove upholstery 16, 26 can be replaced with another easy-to-remove upholstery 16, 26 having different colors, patterns, textures, etc. according to the season, or the dirty easy-to-remove upholstery 16, 26 can be removed and cleaned. It is possible and convenient.

By the way, in the unlikely event that the running vehicle has a collision accident, in the airbag module AM built in the back pad P2, the inflator 51 is actuated by the impact of the collision to supply high pressure gas to the airbag 52. , thereby causing the airbag 52 to rapidly inflate and deploy. At this time, the airbag 52 opens the cover plate 50c of the module case 50, that is, swings outward at the initial stage of its deployment (see FIG. 8(E)), and the cover plate 50c and the open end of the case body 50m The airbag 52 breaks through the gap formed between the airbags 52 and breaks through the rupture permitting portion 25zx facing and adjacent to the gap, and inflates and deploys forward and outward of the vehicle as shown in FIG. 8(F) to protect the occupant.

In this case, the base skin 25 (specifically, the outer peripheral base skin portion 25z) of the seat back skin C2 has a breakable portion m1 that can be broken by the airbag 52 at the initial stage of deployment, and the airbag on the surface of the back pad P2. Arranged at a position corresponding to the deployment start site P2x (that is, at a position facing the deployment start site P2x or at a position near it), the breakable portion m1 serves as a specific connector positioned around the airbag module AM. It is spaced from the fourth fastener f4. As a result, in the initial stage of deployment of the airbag 52, it is possible to effectively prevent the fourth fastener f4 from contacting or interfering with the airbag 52, which is about to inflate and deploy through the rupturable portion m1. This is advantageous in ensuring accurate operation of the

Further, in the present embodiment, the breakable portion m1 of the seat back cover C2 is provided in the base cover 25 fixed to the back pad P2. As a result, it is possible to effectively prevent the breakable portion m1 from slipping with respect to the back pad P2 (therefore, the airbag deployment start portion P2x from the surface of the pad P2), so that the operation of the airbag 52 can be made more stable. .

Further, in the seatback upholstery C2 of the present embodiment, there is a region (that is, a region corresponding to the central base upholstery portion 25m and the left and right base upholstery portions 25s) overlapping the easily removable upholstery 26 on the base upholstery 25. The breakable portion m1 of the base skin 25 is arranged outside (that is, the outer peripheral base skin portion 25z). As a result, there is no possibility that the deployment operation of the airbag 52 will be hindered by the easily attachable/detachable skin 26, which is advantageous in ensuring accurate operation of the airbag 52. FIG.

Further, in this embodiment, in the seat back portion S2, the fourth fastener f4 positioned around the airbag module AM is arranged forward of the breakage allowance portion m1. As a result, even if the airbag 52 expands obliquely forward and outward of the seat back portion S2 while breaking the breakage permitting portion m1, contact and interference between the fourth fastener f4 and the airbag 52 can be effectively prevented.

In addition, the back pad P2 of this embodiment has lead-in grooves g1 to g3 for drawing in a part of the base skin 25, one end of which is opened at the bottom of the lead-in grooves g1 to g3, and the other end of which is opened at the back surface of the back pad P2. The base skin 25 has a plurality of lead-in holes P2h, and the lead-in portions of the base skin 25 into the lead-in grooves g1 to g3 are coupled to respective one ends of the plurality of connection members J1 to J3 penetrating the lead-in holes P2h. The other ends of the members J1 to J3 are connected to the inner surface of the frame main portion 20b of the side frame 20 via the support member 41, and the connection portion (that is, the connection between the support member 41 and the inner surface of the frame main portion 20b) The airbag module AM is attached to the side frame 20 so as to avoid the portion w).

Thus, in order to simplify the seat structure, the connecting members J1 to J3 for pulling in the skin are connected to the common right side frame 20 (specifically, the frame main portion 20b) via the support member 41, and the airbag is provided. Even if the module AM is attached, there is no possibility that the operation of the airbag 52 will be hindered. Moreover, since the attached portion of the airbag module AM attached to the main frame portion 20b, that is, the case body 50m is arranged on the opposite side of the connecting portion w with the main frame portion 20b interposed therebetween, the connecting portion w ( Therefore, the support member 41) and the case body 50m can be compactly opposed to each other with the frame main portion 20b interposed therebetween.

In addition, the frame main portion 20b, which is a plate-like wall portion sandwiched between the joint portion w (therefore, the support member 41) and the case body 50m of the side frame 20, is recessed on one side in the thickness direction. It has a concave curved portion 20ba. By exerting the reinforcing rib effect of the concave curved portion 20ba, the rigidity of the side frame 20 (frame main portion 20b) can be increased while reducing the weight of the frame structure. Each mounting rigidity of the members J1 to J3 and the airbag module AM is effectively increased.

Also shown in FIG. 9 is a second embodiment of the present invention. The second embodiment has basically the same seat structure as the first embodiment. A structure is added in which an outward projecting portion 61 as a contact suppressing portion for suppressing contact between the airbag 52 and the fourth fastener f4 is provided along the fourth fastener f4.

In the second embodiment, the outward projecting portion (contact suppressing portion) 61 is connected (for example, sewn) to the base skin 25, that is, the outer peripheral base skin portion 25s, and extends outward from the surface of the base skin 25. A sheet-like overhang main body 61m that overhangs (particularly toward the fourth fastener f4 side) and a bead-shaped swelling that is integrally connected to the tip of the overhang main body 61m and extends along the fourth fastener f4 and a head 61a. The projecting portion main body 61m is made of a sheet-like flexible material such as a cloth material or a synthetic resin sheet material.

Therefore, in the second embodiment, in addition to the effects of the first embodiment, the following effects can also be achieved.

That is, even if the breakable portion m1 is located relatively close to the fourth fastener f4, the special provision of the outward projecting portion (contact suppressing portion) 61 prevents the contact between the airbag 52 and the fourth fastener f4 during deployment. can be suppressed, the airbag 52 can be deployed and operated more accurately. Moreover, since the outward projecting portion (contact suppressing portion) 61, in particular, the projecting height of the enlarged bead-shaped head portion 61a at the tip portion is higher than the projecting height of the fourth fastener f4, the surface of the base skin 25 is It is possible to effectively suppress the contact between the airbag 52 and the fourth fastener f4 when the airbag 52 is deployed with a simple structure in which the outward projecting portion 61 is provided in the outermost portion.

In the second embodiment, an enlarged head portion 61a having a bead shape, that is, a substantially circular cross section is integrated with the tip of the sheet-like overhang main body 61m of the outward overhang portion (contact suppressing portion) 61. However, the cross-sectional shape of the enlarged head portion 61a is not limited to that of the second embodiment, and any shape that can suppress the contact between the airbag 52 and the fourth fastener f4 during deployment can be used. Just do it. Alternatively, the enlarged head portion 61a may be omitted, and the outward projecting portion (contact suppressing portion) 61 may be configured only by the sheet-like projecting portion main body 61m.

9 and 10 show a third embodiment of the invention. In the seat back skin C2 of the first embodiment, the breakable portion m1 is arranged in the base skin 25 (that is, the outer peripheral base skin portion 25z) outside the overlapping region of the base skin 25 and the easy-to-remove skin 26. In the third embodiment, the first breakage allowance portion m1 is arranged in the base skin 25 (that is, the right base skin portion 25s) in the above region. The easy-to-remove skin 26 is provided with a second breakable portion m2 that overlaps the first breakable portion m1. The first and second breakable portions m1 and m2 are formed at the front edge, upper edge, and lower edge of the cover plate 50c of the module case 50 (therefore, the cover pad P2C), similarly to the breakable portion m1 of the first embodiment. It consists of a series of small holes arranged in a perforated pattern along the edge.

Note that the first and second breakable portions m1 and m2 are similar to the breakable portion m1 of the first embodiment, and the base skin 25 and the easy-to-remove skin 26 are secured at the initial stage of deployment while ensuring cover strength that can withstand normal use. Any fragile structure that can be broken by the airbag 52 can be used, and various fragile structures can be adopted without being limited to the embodiment. For example, in place of the perforation-like small hole group as described above, the corresponding portions of the base skin 25 and the easily removable outer skin 26 may be configured to be thinner than the other portions, or may be A longitudinal cut may be made and both sides of the cut portion may be sewn together with low strength (that is, so as to be easily torn).

Also in the third embodiment, basically the same effect as in the first embodiment can be achieved.

Furthermore, in the third embodiment, even if there is a region on the base skin 25 that overlaps the easy-to-remove skin 26 and the first breakage allowance portion m1 is arranged in this region, the first breakage allowance portion m1 and Since the overlapping second breakable portion m2 is provided on the easy-to-remove skin 26, there is no fear that the easy-to-remove skin 26 will interfere with the deployment operation of the airbag 52. be advantageous.

In addition, it is also possible to apply the outward projecting portion (contact suppressing portion) 61 of the second embodiment to the structure of the outer skin C2 of the third embodiment. ) 61 is joined, for example sewn, to the easily attachable/detachable skin 26 (specifically, the right easily attachable/detachable skin portion 26s).

Although the embodiment of the present invention has been described above, the present invention is not limited to the embodiment, and various design changes are possible without departing from the scope of the invention.

For example, in the above-described embodiment, an automobile seat S is illustrated as a vehicle seat, but in the present invention, a seat used in a vehicle other than an automobile (for example, a railroad vehicle) or a vehicle other than a vehicle (for example, a ship, an aircraft). It is also applicable to the sheets used.

In the above embodiment, the airbag module AM is built in the back pad P2 of the seat back portion S2, and the airbag 52 is inflated and deployed from the surface of the back pad P2. The bag module may be incorporated in the seat pad P1 of the seat seat S1 so that the airbag is inflated and deployed from the surface of the seat pad P1. In this case, at least one of the first and second skins (that is, the base skin 15 and the easy-to-remove skin 16) of the seat cushion C1 is provided with fasteners f1' to 1 as connectors for connecting the first and second skins to each other. A breakable portion m1 is provided at a distance from f4'.

Further, in the above-described embodiment, the seat upholstery C1 and the seat back upholstery C2 have a two-layer structure in which at least a part of the base upholstery 15, 25 overlaps the easily removable upholstery 16, 26, but the present invention. Then, a one-layer structure in which the base skin and the easy-to-remove skin do not overlap each other (see, for example, Japanese Unexamined Patent Application Publication No. 2016-97275) may be used. Even in the case of the one-layer structure, the retracting structure of the outer skin is the same structure as in the above-described embodiment. Further, in the case of the single-layer structure, either the base skin (first skin) or the easy-to-remove skin (second skin) is provided with the rupture permissible portion m1 at a specific connection located around the airbag module AM. provided at a distance from the fixture (fourth fastener f4).

In the above-described embodiment, each of the base skins 15, 25 and the easy-to-remove skins 16, 26 constituting the seat cushion C1 and the seat back skin C2 has a thin single-layer structure. In the invention, at least one of the base skins 15 and 25 and the easily removable skins 16 and 26 has a multi-layered structure (for example, a thin cushion sheet material is sandwiched between at least two overlapping outer skins) -14628)).

Further, in the above-described embodiment, the base skin 25 of the seat back skin C2 has a breakable portion m1 that can be broken by the airbag 52 in the initial stage of deployment, and is located at a corresponding position ( That is, a position facing the deployment start portion P2x or a position in the vicinity thereof) is shown so that the breakage allowance portion m1 can be broken easily and efficiently. Any position may be sufficient as long as the airbag 52 is ruptured at the initial stage of deployment of the airbag 52 so that the deployment operation of the airbag 52 can be permitted without difficulty.

In the above embodiment, the airbag module AM includes the flat box-shaped module case 50 that houses the folded airbag 52 and the inflator 51. The module case 50 stores the airbag 52 on the back pad P2 surface. However, the present invention may use a caseless airbag module (see, for example, Japanese Patent No. 6211839) that omits the module case. In this case, in order to suppress the expansion of the airbag toward the front inside of the back pad and to properly control the deployment direction of the airbag, a force cloth (for example, See Japanese Patent No. 6211839) can be used.

Further, in the above-described embodiment, the first and second connecting members J1 and J2 passing through the lead-in hole P2h are engaged with the support member 41 fixed to the inner surface of the side frame 20 (more specifically, the frame main portion 20b). However, in the case of a seat structure in which the lead-in hole P2h and the side frame 20 are close to each other, the support member 41 is omitted and the first and second connecting members J1 and J2 are provided on the side frame 20. Alternatively, it may be directly engaged and connected to a not-illustrated engaging portion (for example, a through hole, a hook-shaped projection, or the like).

In the above-described embodiment, the member main body Ja of each of the connecting members J1 to J3 is made of a rigid strip material, but the shape of the member main body Ja of the connecting member of the present invention is not limited to the embodiment. , a shape that can pass through the lead-in hole P2h. For example, the member main body Ja may be made of a rod-shaped member, or may be made of a flexible material as long as the necessary connection strength can be ensured.

In the above embodiment, each of the connecting members J1 to J3 is directly connected (sewn) to the lead-in portion of the skin C2 (specifically, the base skin 25) into the lead-in grooves g1 to g3. Each connecting member J1-J3 may be coupled to the lead-in portion via edge reinforcing members (eg, wires) attached to the lead-in portion and extending in the longitudinal direction of the lead-in grooves g1-g3.

Further, in the above-described embodiment, the vehicle seat provided without the air blowing air conditioning function for the seat was exemplified. ), and a duct connecting between the ventilation path and the blower, and a vehicle seat that exhibits a seat blower air conditioning function (see, for example, PCT International Publication WO2018/061602A2, Japanese Patent Application Laid-Open No. 2005-287532, etc.) It is also applicable to In this case, the airbag module AM, the support member 41, the lead-in grooves g1-g3, g1'-g3', the lead-in hole P2h, the connection members J1-J3, the pressure receiving plate 24, the wave spring 29 and the wire 28 of this embodiment are It is arranged so as to avoid the above-described ventilation path, duct, and air blower provided in the seat portion S1 or the seat back portion S2.

AM: Airbag module C2: Seatback skins f1 to f4 as skins: First to fourth fasteners g1, g2 as connecting parts: First and second pull-in grooves 2 lead-in grooves J1, J2 . . . 1st and 2nd connecting members m1 as connecting members . . . . back pad P2h as pad .. lead-in hole S .. automobile seat S2 as vehicle seat .. seat back portion w .. connecting portion Coupling portion 20 Side frame 20b as a frame Main frame portion 20ba as wall portion Concave curved portion 25 Base skin 26 as first skin Easy-to-remove skin 41 as a second skin...Supporting member 50m...Case main body 52 as a part to be attached...Airbag 61...Outward tension as a contact suppressing part Idebe

Claims (10)

a pad (P2), a frame (20) supporting the pad (P2) from the back side, a first skin (25) fixed to the pad (P2) and covering the surface of the pad (P2), A second skin that is detachably connected to the first skin (25) via connectors (f1 to f4) and covers part of the surface of the pad (P2) directly or via the first skin (25). (26) in a vehicle seat comprising
The frame (20) is provided with an airbag module (AM) that houses an airbag (52) that can be deployed outward from the surface of the pad (P2),
At least one of the first and second skins (25, 26) has a breakable portion (m1) that can be broken to allow the deployment of the airbag (52). A vehicle seat, characterized in that it is spaced from .about.f4). 2. The vehicle seat according to claim 1, wherein said breakable portion (m1) is provided in said first skin (25). There is a region on the first skin (25) that overlaps the second skin (26), and the breakable portion (m1) is provided in the first skin (25) outside the region. 3. A vehicle seat according to claim 2, characterized in that: There is a region on the first skin (25) that overlaps the second skin (26), and the first breakable portion (m1) is provided in the first skin (25) in the region. 3. A vehicle seat according to claim 2, characterized in that a second breakage allowance (m2) overlapping said first breakage allowance (m1) is provided on said second skin (26). The pad and the frame are a back pad (P2) and a side frame (20) in a seat back portion (S2) that supports the back of the occupant,
The breakable portion (m1) is spaced in the front-rear direction of the seatback portion (S2) from the specific connector (f4) positioned around the airbag module (AM). A vehicle seat according to claim 1 or 2, characterized in that: The portion of the first skin (25) or the second skin (26) adjacent to the specific connector (f4) located around the airbag module (AM) has the airbag at the time of deployment. According to claim 2, a contact suppressing portion (61) that suppresses contact between (52) and the specific connector (f4) is provided along the specific connector (f4). Vehicle seat as described. The contact suppressing portion (61) is composed of an outward protruding portion (61) protruding outward from the surface of the skin (25) on which the contact suppressing portion (61) is provided. 7. Vehicle seat according to claim 6, characterized in that the overhang height of 61) is higher than the overhang height of said particular connector (f4). The pad (P2) includes retracting grooves (g1, g2) for retracting at least a part of the first skin (25) of the first and second skins (25, 26), and the retracting groove (g1 , g2) and a lead-in hole (P2h) whose one end is open to the bottom of the pad (P2) and whose other end is open to the back surface of the pad (P2),
A portion of the first skin (25) that is drawn into the groove (g1, g2) is coupled to one end of a connecting member (J1, J2) passing through the hole (P2h),
The other ends of the connecting members (J1, J2) are connected to the inner surface of the frame (20) directly or via a support member (41), and the air is connected to avoid the connecting portion (w). Vehicle seat according to any one of the preceding claims, characterized in that a bag module (AM) is attached to said frame (20). The attached portion (50m) of the airbag module (AM) attached to the frame (20) is arranged on the opposite side of the connecting portion (w) across the frame (20). The vehicle seat according to claim 8, wherein: A plate-like wall portion (20b) sandwiched between the attached portion (50m) and the connecting portion (w) of the frame (20) is recessed on one side in the thickness direction of the wall portion (20b). 10. Vehicle seat according to claim 9, characterized in that it has a concave curve (20ba).

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