JP2023111987A5 - - Google Patents

Description

The present invention provides a vehicle seat, particularly a pad, a frame supporting the back surface of the pad, a first skin fixed to the pad and covering the surface of the pad, and a first skin removably connected to the first skin via a connector. The present invention relates to a vehicle seat having a second skin covering a part of the surface of the pad directly or through the first skin.

In the vehicle seat described above, there is an advantage that the second skin can be replaced with another second skin as needed with respect to the first skin. A vehicle seat having such an easily removable skin is conventionally known as shown in Patent Document 1, for example, and in this known seat, a fastener is used as a connecting device between the first and second skins. ing.

In addition, as shown in Patent Document 2, for example, a vehicle seat in which an airbag module that stores an airbag that can be deployed outward from the surface of the pad is provided in a frame that supports the back surface of the pad is conventionally used. It is publicly known.

JP2016-97275A Japanese Patent Application Publication No. 2015-20457

In the conventional vehicle seat with an easily removable skin as in Patent Document 1, it is not envisaged that this will be applied to a seat with an airbag as in Patent Document 2, but if it is applied, the first , If the connecting device (for example, a fastener) between the second skins is close enough to overlap the area where the airbag starts to deploy from the pad surface, there is a possibility that the contact device will easily interfere with the airbag at the initial stage of deployment. be.

The present invention has been proposed in view of the above, and an object of the present invention is to provide a vehicle seat that can solve the above problems.

In order to achieve the above object, the present invention provides a pad, a frame that supports the pad from the back side, a first skin fixed to the pad and covering the surface of the pad, and a connecting device attached to the first skin. a second skin that is removably connected to the frame through a second skin that covers a part of the surface of the pad directly or through the first skin; An airbag module for storing an airbag that can be deployed on one side is provided, and the first skin has a breakable part that is spaced apart from the connector to allow the deployment of the airbag. a region overlapping with the second skin exists on the first skin, and in the region, the first breakage tolerance portion is provided on the first skin, and the first A second breakage permitting portion that overlaps the breakage permitting portion is provided on the second skin, and the first breakage permitting portion and the second breakage permitting portion are provided on a side surface of the pad, and the second breakage permitting portion overlaps with the breakage permitting portion. A first feature is that the connecting tool is provided at the rear of the first and second breakage tolerance parts in the front-rear direction .

In addition to the first feature, the present invention provides that the first breakage permitting portion and the second breakage permitting portion are provided forward of the front end of the airbag module in the front-rear direction of the seat. This is the second feature.

In addition to the first or second feature, the present invention provides that the airbag module includes a box-shaped module case that extends along the outer surface of the frame and is flat in the seat width direction; The module case includes an inflator that is stored and fixed, an airbag that can be rapidly inflated with high-pressure gas from the inflator, and a holding bag that holds the airbag in a folded state during normal times. The case body is provided with a flat plate-shaped case body that opens at A third feature is that the module case is provided forward of the front end of the lid plate of the module case in terms of direction .

Further, in the present invention, in addition to any one of the first to third features, the first breakage permitting portion and the second breakage permitting portion are located forward of the front end of the frame in the front-rear direction of the seat. The fourth feature is that it is provided in.

Further, in addition to any one of the first to fourth features, the present invention provides that a reinforcing portion is formed in a widthwise intermediate portion of the frame whose width direction is the front and rear direction of the seat, and that the connecting tool is connected to the front and back of the seat. A fifth feature is that the reinforcing portion is provided forward of the reinforcing portion in the direction .

In addition to the fifth feature, the present invention has a sixth feature that the connector is provided at a position aligned with the front end of the reinforcing portion in the front-rear direction of the seat .

Further, in the present invention, in addition to any one of the first to sixth features, the airbag module is fixed to the frame by a fixing member, and the connecting tool is connected to the fixing member in the front-rear direction of the seat. The seventh feature is that they are provided in side-by-side positions .

Further, in addition to any one of the first to seventh features, the present invention has an eighth feature that the connector is provided at a position aligned with the front end of the airbag in the front-rear direction of the seat .

In addition to any one of the first to eighth features, the present invention has a ninth feature that the connector is provided at a position aligned with the front end of the frame in the front-rear direction of the front seat .

Further, in addition to any one of the first to ninth features, the present invention includes a seat seat section, a seat back section, and a headrest section attached to an upper part of the seat back section, and the seat seat section is , comprising a seat pad, a seat frame that supports the seat pad from the back side, and a seat skin that covers the surface of the seat pad, and the seat frame is attached to the vehicle floor for longitudinal position adjustment. The seat back portion is supported through a mechanism so as to be adjustable in its longitudinal position, and includes a back pad, a back frame that supports the back pad from the back side, and a seat back skin that covers the surface of the back pad. The back frame is supported by a rear part of the seat frame via a reclining mechanism, and the seat back part is configured such that a standing angle can be arbitrarily adjusted and fixed by the reclining mechanism. It has 10 characteristics.

In the present invention, the term "rupture permitting portion" refers to a fragile portion that is provided in advance on the skin to permit deployment of the airbag when it is deployed, and is capable of being fractured by the airbag at the initial stage of deployment.

Furthermore, in the present invention, 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 directly connected to the inner surface of the frame; When the other end of the connecting member is connected to the inner surface of the frame via a support member, it refers to the joint portion between the support member and the inner surface of the frame.

According to the features of the present invention , the first skin is fixed to the pad, and the second skin is removably connected to the first skin via a connector and covers a part of the pad directly or through the first skin. In a vehicle seat having an airbag module in the frame, there is a region on the first skin that overlaps with the second skin, and in this region, the first breakage tolerance part A second breakable part is provided on the first skin and overlaps with the first breakable part, and the first and second breakable parts are provided on the side surface of the pad; Since the connecting tool is provided behind the first and second rupture permitting parts in the front-rear direction of the seat , the connecting tool between the first and second skins contacts and interferes with the airbag at the initial stage of airbag deployment. This is advantageous in ensuring accurate operation of the airbag .

Further, even if there is a region overlapping with the second skin on the first skin and the first breakage tolerance part is arranged in this region, the second breakage tolerance part that overlaps with the first breakage tolerance part is the second breakage tolerance part. Since it is provided on two skins, there is no possibility that the deployment operation of the airbag will be obstructed by the second skin, which is advantageous in ensuring accurate operation of the airbag.

An overall perspective view showing an automobile seat according to a first embodiment of the present invention (A) is a perspective view showing a state in which the easy-to-remove skin has been removed from the base skin in the seat portion and seat back portion of the seat, and (B) is a perspective view of the seat pad and back pad separately before the base skin is attached. A perspective view showing a state in which the back pad is removed and the back frame is exposed in the seat back part. Enlarged sectional view taken along line 4-4 in Figure 3 Enlarged cross-sectional view on line 5-5 in Figure 3 Enlarged sectional view on line 6-6 in Figure 3 (C) is a perspective view of the seat back section viewed from the front outside (i.e., the airbag installation side), and (D) is a perspective view of the back pad viewed from the front outside. FIG. 6 is a sectional view corresponding to FIG. 5 schematically showing an example of the airbag deployment process, in which (E) shows the initial state of airbag deployment, and (F) shows the completed state of airbag deployment. A sectional view corresponding to FIG. 5 showing the second embodiment of the present invention A sectional view corresponding to FIG. 5 showing the third embodiment of the present invention 8(G) corresponds to FIG. 8(E), and (H) corresponds to FIG. 8(F). FIG.

Embodiments of the present invention will be described below based on the accompanying drawings. In this specification, front and rear, left and right, and up and down refer to front and back, left and right, and up and down, respectively, as seen from the passenger sitting on the seat.

First, a first embodiment will be described with reference to FIGS. 1 to 8. An automobile seat S as a vehicle seat includes a seat 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 attached to an upper portion of the seat back portion S2. A headrest part S3 is provided.

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

The seat portion S1 includes a seat pad P1, a seat frame F1 that supports the seat pad P1 from the back side, and a seat skin C1 that covers the surface of the seat pad P1. The seat frame F1 is supported by the vehicle body floor 30 so as to be adjustable in its longitudinal position via a conventionally known longitudinal position adjustment 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 at the rear of the seat frame F1 via a conventionally well-known reclining mechanism 32, and the reclining mechanism 32 allows the seat back part S2 to adjust and fix the standing angle as desired. ing.

Next, the specific structure of the seat back portion S2 will be explained.

As shown in FIG. 3, the back frame F2 serving as 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 space between the upper and lower parts of the side frames 20, 20. It is composed of a metal frame frame including upper and lower cross members 21 and 22 extending in the left-right direction to be connected to each other, and a headrest support frame portion 23 that integrally connects the upper ends of both side frames 20 and 20. Ru.

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

Furthermore, a concave curved portion 20ba that is recessed toward one side (inward of the seat in the embodiment) in the thickness direction, that is, the left-right direction, and extends in the vertical direction is integrally molded in the widthwise intermediate portion of the frame main portion 20b as a reinforcing portion. The concave curved portion 20ba exhibits a reinforcing rib effect, thereby increasing the rigidity of the frame main portion 20b (and thus the side frame 20).

On the inner surface of each side frame 20 (specifically, the concave curved part 20ba of the frame main part 20b and the frame upper part 20a), a plurality of support members 41 made of a corrugated bar with alternating peaks and valleys are arranged. The outwardly extending portions 41o of the two are connected (for example, by welding). This support member 41 is used to lock and connect retraction connecting members J1 and J2 of the seat back skin C2, which will be described later. Note that the shape and structure of the support member 41 is not limited to the embodiment, and for example, a band plate material bent into a corrugated shape may be used.

A pressure receiving 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 stretched between both 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 supported horizontally between the left and right side frames 20, 20. The pressure receiving plate 24, the wave spring 29, and the 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 that forms the main part of the back pad P2, and a flat cover pad P2C that covers the outside of the airbag module AM, which will be described later. As shown in FIG. 2, the main back pads P2M, which are each molded into a predetermined shape using polyurethane foam (for example, urethane foam), are connected to a pad main body P2m whose front surface serves as a support surface for the passenger's back, and to the left and right sides of the pad main body P2m, and which extend in front. The left and right raised pad portions P2s are provided to extend outward and 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 frame 20 (see FIGS. 4 and 5). . The left and right raised pad portions P2s cover the front, rear end surfaces, and outer surfaces of the side frame 20.

Furthermore, among the left and right raised pad portions P2s, especially the raised pad portion P2s on the outside of the vehicle (for example, the right side since the seat S in the embodiment is for the driver's seat) is equipped with a module as shown in FIGS. 5 and 7. An opening O for use is formed. An airbag module AM is housed in this 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 is clear from FIGS. 5 and 7, the airbag module AM includes 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, and is stored within the module case 50. , a fixed inflator 51, an airbag 52 that can be rapidly inflated with high pressure gas from the inflator 51, and a holding bag 53 that holds the airbag 52 in a folded state during normal times. The inflator 51 is capable of supplying high-pressure gas into the airbag 52 by operating based on a detection signal from a collision sensor (not shown) capable of detecting an impact at the time of a vehicle collision. Further, the holding bag 53 can be immediately ruptured by the expansion of the air bag 52.

The module case 50 includes a flat dish-shaped case body 50m that opens to the outside of the vehicle, and a lid plate 50c that opens and closes the outer end opening of the case body 50m.The bottom wall of the case body 50m is the main part of the frame. It is fixed to the portion 20b with a plurality of sets of bolts b and nuts n, which are fixing members .

The rear edge of the cover plate 50c is pivotably connected 50h to the rear edge of the opening of the case body 50m. Further, the front edge of the cover plate 50c is removably engaged with the front edge of the opening of the case body 50m when the cover plate 50c closes the opening of the case body 50m. The locking portion 50k has a locking structure that is easily released by the expansion of the airbag 52 and allows the cover plate 50c to be opened.

By the way, on the front surface of the main back pad P2M, as shown in FIG. 2, there are first and second retraction grooves g1 and g2 that extend in the vertical direction at each boundary between the pad body P2m and the left and right raised pad portions P2s, respectively. A third retraction groove g3 extending in the left-right direction is recessed so as to communicate between the intermediate portions of the first and second retraction grooves g1 and g2. Furthermore, the main back pad P2M has a plurality of lead-in holes P2h, as shown in FIGS. 4 to 6, one end of which is open at the bottom of each of the lead-in grooves g1 to g3, and the other end of which is opened to the back surface of the main back pad P2M. ... are formed at intervals in the longitudinal direction of each of the lead-in grooves g1 to g3.

Further, the seat back 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. The easily attachable and detachable skin 26 is removably connected to the base cover 25 through the first to third fasteners f1 to f3 in each of the lead-in grooves g1 to g3, as will be described later. It is detachably connected to the base skin 25 via the fourth fastener f4.

The base skin 25 includes, in accordance with the shape of the back pad P2, a central base skin part 25m that covers the pad body P2m, and left and right base skin parts 25s that cover the front and side surfaces of the left and right raised pad parts P2s. , and an outer peripheral base skin part 25z that covers the entire outer peripheral surface of the back pad P2, and the base skin parts 25m, 25s, and 25z are sewn to each other, and the whole back pad is integrated. Covers P2. Of the base skin 25, only the outer peripheral base skin part 25z is located in a region that does not overlap with the easily attachable and detachable skin 26, and is always exposed to the outside.

As shown in FIGS. 4 and 5, particularly the left and right sides of the outer peripheral base skin part 25z are fixed (for example, bonded) to the left and right raised pad parts P2s and the side frames 20 so as to wrap around their respective rear end surfaces, and Particularly, the upper and lower both sides of the latter half of the outer peripheral base skin part 25z are fixed (eg, bonded) to the upper and lower end parts of the pad main body P2m so as to wrap around their respective rear end surfaces.

It should be noted that a portion of the back surface of the seat back portion S2 that is difficult to cover with the outer circumferential base skin portion 15z can be covered in a good manner by attaching a cover member (not shown) to the back surface of the seat back portion S2.

Furthermore, as shown in FIGS. 5 and 7, a flat cover pad P2C facing the outer surface of the module case 50 (particularly the cover plate 50c) is fixed to the surface of the outer base skin portion 25z that faces the airbag module AM ( For example, glued).

Next, a structure for retracting and fixing the base skin 25 to the back pad P2 will be described with reference to FIGS. 3 to 6. The sewn parts of the center base skin part 25m and the left and right base skin parts 25s of the base skin 25 are set at positions corresponding to the first and second retraction grooves g1 and g2, respectively, and are set in positions corresponding to the first and second retraction grooves g1 and g2, respectively. g1, g2, and the retracted portion connects the side frame 20 (specifically 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 central base skin portion 25m are drawn into the third retraction groove g3, and the retracted portions are engaged with the pressure receiving plate 24 via a plurality of connecting members J3 that penetrate the back pad P2. Concatenated.

To explain more specifically, each sewn portion between the central base skin part 25m and the left and right base skin parts 25s has a front end of each of a plurality of first and second connecting members J1..., J2... extending in the front-rear direction. are fixed (for example, sewn), and these connecting members J1..., J2... pass through a plurality of lead-in holes P2h... opened at intervals in the first and second lead-in grooves g1, g2, respectively, and are connected to the back. It reaches the rear surface of pad P2. Furthermore, the front end portions 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 these connecting members J3 are attached to the third retracting groove g3. It passes through each of the plurality of lead-in holes P2h that are opened at intervals to reach the rear surface of the back pad P2.

The first to third connecting members J1 to J3 each include a member main body Ja formed in a band shape and extending in the front-rear direction, and a locking piece Jk coupled and fixed to the rear end of the member main body Ja. In this embodiment, the locking pieces Jk are composed of J-shaped hook bodies, and among them, the locking pieces Jk of the first and second connecting members J1 and J2 are attached to the side frame as shown in FIGS. 4 and 5. The support member 41 is locked and connected to the inward protruding portion 41i of the support member 41 fixed to the support member 20. On the other hand, as shown in FIG. 6, the locking piece Jk of the third connecting member J3 is engaged with the through hole h1 of the pressure receiving plate 24, which is located at the opposite part of the lead-in hole P2h that opens in the third lead-in groove g3, or in the vicinity thereof. stopped and connected.

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

Furthermore, the locking pieces Jk of the first to third connecting members J1 to J3 are not limited to the above-mentioned hook bodies, but can be used for the support member 41, the wire 28, the spring 29, the through hole h1 of the pressure receiving plate 24, etc. It can be formed into various shapes that can be locked and connected. For example, the locking piece Jk may be constituted by a clip body (not shown) having an elastically deformable hook portion at the tip.

Next, the easily removable skin 26 will be specifically explained. As shown in FIG. 2, the easy-to-detach skin 26 includes a central easy-to-detach skin part 26m that covers the central base skin part 25m of the base skin 25, and left and right easy-to-detach skin parts 26s that cover the left and right base skin parts 25s, respectively. In addition, these easily removable skin parts are sewn together, and the whole covers the front surface and the left and right side front parts of the base skin 25 (i.e., the area excluding the outer peripheral base skin part 25z). .

The connection structure between the easily removable skin 26 and the base skin 25 will be described next with reference to FIGS. 4 and 5.

That is, the inner sides of the first and second fasteners f1 and f2 are attached to the sewn parts of the central base skin part 25m and the left and right base skin parts 25s, which are drawn into the first and second pull-in grooves g1 and g2, respectively. The fastener pieces f1i and f2i are each fixed (for example, sewn). In addition, first and second fasteners f1, The outer fastener pieces f1o and f2o of f2 are each fixed (for example, sewn).

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 portions of the central base skin portion 25m that are drawn into the third retracting groove g3. Further, the outer fastener piece f3o of the third fastener f3 is fixed (for example, sewn) to the front and rear intermediate portions of the central easily removable skin portion 26m that is drawn into the third retracting groove g3.

In the first to third fasteners f1 to f3, the outer fastener pieces f1o to f3o and the inner fastener pieces f1i to f3i are connected to sliders f1s to f3s within the first to third retraction grooves g1 to g3, respectively. It can be attached or detached as desired by sliding the button.

Furthermore, the inner fastener of the fourth fastener f4 is attached to the sewn portion between the upper edge of the central base skin part 25m, the outer edges of the left and right base skin parts 25s, and the front edge of the outer peripheral base skin part 25z. Piece f4i is fixed (for example, sewn). Further, an outer fastener piece f4o of the fourth fastener f4 is fixed (for example, sewn) to the upper edge and left and right outer edges of the easily removable skin 26. The outer fastener piece f4o and the inner fastener piece f4i of the fourth fastener f4 can be connected to each other in a detachable manner as desired by sliding the slider f4s on the outer peripheral surface (i.e., the upper surface and left and right side surfaces) of the back pad P2. be done.

The functions of the above-mentioned sliders f1s to f4s are similar to those of sliders of conventionally known wire fasteners.

By the way, at the initial stage of the airbag 52's inflation, the locking part 50k is automatically unlocked according to the change in the inflation, and the cover plate 50c is pivoted outward around the pivot connection 50h at the rear end. make it move. This allows the airbag 52 to inflate and deploy outward in the front of the vehicle through the gap created between the cover plate 50c and the open end of the case body 50m (see FIG. 8(E)). The above-mentioned gap or a 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 connection with the above-described installation of the airbag 52, the outer circumferential 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 breakage permitting portion m1 is located at a position corresponding to the airbag deployment start portion P2x (i.e., at a position corresponding to the deployment start portion P2x) so that it can be easily and efficiently ruptured in the airbag 52 at the initial stage of deployment. (opposed to or in the vicinity of).

The breakage tolerance portion m1 of this embodiment is constituted by a series of small holes formed in the outer circumferential base skin portion 25z and arranged in a perforation shape. The breakage tolerance portion m1 extends approximately along the front edge, upper edge, and lower edge of the cover plate 50c so as to slightly surround the cover plate 50c of the module case 50 (therefore, the above-mentioned cover pad P2C). Arranged in a letter shape. Furthermore, the breakage tolerance portion m1 (therefore, the deployment start portion P2x) is spaced apart from the fourth fastener f4 of the first to fourth fasteners f1 to f4, which is located around the airbag module AM (that is, spaced apart from the fourth fastener f4 in the front-rear direction). ) located.

The breakage tolerance part m1 may have a fragile structure that can be broken by the airbag 52 in the early stage of deployment while ensuring cover strength that can withstand normal use in the outer peripheral base skin part 25z, and is not limited to the embodiment. Various fragile structures can be adopted. For example, instead of the perforation-like small hole group as described above, this part of the outer peripheral base skin part 25z may be made thinner and more easily torn than other parts, or the part may be made with a cut that bisects it. It is also possible to have a configuration in which the cut portion is sewn together on both sides with low strength (that is, so as to be easily torn).

Thus, 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. Further, the first to fourth fasteners f1 to f4 are examples of the connecting device of the present invention, and among them, 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. This is an example.

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

The seat pad P1 of the seat seat S1 is also covered with a seat skin C1 including a base skin 15 and an easily removable skin 16, and the attachment structure of this skin C1 to the seat pad P1 is as follows. This is similar to the above-described attachment structure of the back skin C2 to the back pad P2. For example, the upper surface of the seat pad P1 is provided with retraction grooves g1' to g3' for retracting the skin in the same manner as the back pad P2, and the base skin 15 and the easily removable skin 16 are different from those used in the seat back skin C2. They are removably connected using fasteners f1' to f4' similar to the fasteners f1 to f4 that were previously used.

Next, the operation of the first embodiment will be explained. When assembling the seat S, the back pad P2 is attached to the back frame F2 before the seat back skin C2 is attached, and the airbag module AM is attached to the outer surface of one side frame 20 of the back frame F2. It will be done. From this state, the work of assembling the seat back skin C2 onto the back pad P2 is performed as follows.

Regarding the base skin 25 of the seat back skin C2, the outer circumferential base skin part 25z, the center base skin part 25m, and the left and right base skin parts 25s are sewn together, and the first to third A base skin unit is made 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 placed over the front surface of the back pad P2. Place it like this.

From this state, part of the skin of the base skin unit is pulled into the first to third retraction grooves g1 to g3 on the front surface of the back pad P2, respectively. Then, the first to third connecting members J1 to J3 connected to each of the retracting portions are extended to the back side of the back pad P2 through the retracting hole P1h. Of the extending ends, especially the locking pieces Jk of the first and second connecting members J1 and J2 are locked and connected to the inner protrusion 41i of the support member 41 fixed to the inner surface of the side frame 20, and on the other hand, 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 sides of the outer peripheral base skin part 25z of the base skin unit described above are fixed to the left and right raised pad parts P2s and the side frame 20 so as to wrap around their respective rear end surfaces, as shown in FIGS. 4 and 5. At the same time, the upper and lower sides of the outer peripheral base skin portion 25z are fixed (eg, adhesively bonded) to the upper and lower end portions of the pad main body P2m so as to wrap around their rear end surfaces.

In this way, the base skin unit including the base skin parts 25m, 25s, and 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 pulled into the first to third retraction grooves g1 to g3, the first and second connecting members J1 and J2 are attached to the support member 41 fixed to the inner surface of the side frame 20. The third connecting member J3 is retained by being locked and connected to the through hole h1 of the pressure receiving plate 24, so that the base skin 25 is free from misalignment, loosening, and wrinkles due to long-term use. etc. can be effectively prevented from occurring.

On the other hand, as for the easily removable skin 26 of the seat back skin C2, the center easily removable skin part 26m and the left and right easily removable skin parts 26s are sewn together, and first to fourth fasteners are attached to predetermined parts. An easily attachable and detachable skin unit is prepared in advance by sewing outer fastener pieces f1 to f4, f1o to f4o. Then, this easily removable skin unit is placed so as to cover 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 are By sequentially connecting the inner fastener pieces f1i to f3i, a portion of the easily removable skin 26 is drawn into the first to third retraction grooves g1 to g3, respectively. After that, by connecting the outer fastener piece f4 and the inner fastener piece f4i of the fourth fastener f4, the base skin 25 is pulled in part of the easy-to-attach and detach skin 26 into the first to third retraction grooves g1 to g3. Can be connected and fixed. In addition, when removing the easily removable skin 26 from this state, the procedure is reversed to that described above.

In this way, attachment of the seat back skin C2 to the back pad P2 is completed. Also, when attaching the base skin 15 and the easily removable skin 16 of the seat skin C1 to the seat pad P1, the installation work can be performed using the same installation procedure as for the seat back skin C2 described above.

In the seat portion S1 and the seat back portion S2 having the above structure, the easily attachable and removable skins 16 and 26 are attached to the base skins 15 and 25 fixed to the seat pad P1 and the back pad P2, respectively, using fasteners f1 to f4, f1' to f4' allows it to be easily attached and detached at any time. For this reason, the easily removable skins 16, 26 may be replaced with other easily removable skins 16, 26 that have different colors, patterns, textures, etc. depending on the season, or the dirty easily removable skins 16, 26 may be removed and cleaned. It is possible and convenient.

By the way, in the event that the traveling vehicle causes a collision, in the airbag module AM built into the back pad P2, the inflator 51 is activated by the impact of the collision and supplies high pressure gas to the airbag 52. , As a result, the airbag 52 attempts to rapidly inflate and deploy. At this time, the airbag 52 opens or swings the cover plate 50c of the module case 50 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 are connected to each other. The airbag 52 penetrates through the breakage permitting portion 25zx that faces and is adjacent to the gap, and inflates and deploys outward toward the front of the vehicle to protect the occupant, as shown in FIG. 8(F).

In this case, the base skin 25 (specifically, the outer peripheral base skin part 25z) of the seat back skin C2 has a breakable part m1 that can be broken by the airbag 52 in the early stage of deployment, and the airbag on the surface of the back pad P2 has a breakable part m1. The breakage tolerance part m1 is arranged at a position corresponding to the deployment start part P2x (that is, a position opposite to the deployment start part P2x or a position in the vicinity thereof), and this breakage tolerance part m1 is a specific connector located around the airbag module AM. It is arranged at a distance from the fourth fastener f4. This effectively prevents the fourth fastener f4 from coming into contact with and interfering with the airbag 52 which is about to inflate and deploy by breaking through the breakage permitting portion m1 at the initial stage of deployment of the airbag 52. This is advantageous in ensuring accurate operation.

Further, in this embodiment, the breakage tolerance portion m1 of the seat back skin C2 is provided on the base skin 25 fixed to the back pad P2. As a result, it is possible to effectively prevent the breakage tolerance portion m1 from shifting relative to the back pad P2 (therefore, the airbag deployment start portion P2x from the surface of the pad P2), thereby making it possible to further stabilize the operation of the airbag 52. .

In addition, in the seat back skin C2 of this embodiment, there is a region on the base skin 25 that overlaps with the easily attached and detached skin 26 (that is, a region corresponding to the center base skin portion 25m and the left and right base skin portions 25s). A breakable portion m1 of the base skin 25 is disposed outside of the base skin 25 (that is, the outer peripheral base skin portion 25z). This eliminates the possibility that the deployment operation of the airbag 52 will be obstructed by the easily removable skin 26, which is advantageous in ensuring accurate operation of the airbag 52.

Further, in the present embodiment, in the seat back portion S2, the fourth fastener f4 located around the airbag module AM is arranged on the front side of the breakage tolerance portion m1. As a result, even if the airbag 52 deploys obliquely forward and outward of the seatback portion S2 while rupturing the breakage permitting portion m1, it is possible to effectively prevent contact and interference between the airbag 52 and the fourth fastener f4.

In addition, the back pad P2 of this embodiment has retraction grooves g1 to g3 for retracting a part of the base skin 25, and one end is open at the bottom of the retraction grooves g1 to g3, and the other end is open at the back surface of the back pad P2. The base skin 25 has a plurality of lead-in holes P2h, and the part of the base skin 25 that is drawn into the lead-in grooves g1 to g3 is connected to one end of each of the plurality of connecting members J1 to J3 that pass through the lead-in holes P2h, and The other end portions 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 (i.e., 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 while avoiding part w).

As a result, in order to simplify the seat structure, the skin retraction connecting members J1 to J3 are connected to the common right side frame 20 (specifically, the frame main part 20b) via the support member 41, and the airbag Even if the module AM is installed, there is no risk of interfering with the operation of the airbag 52. Moreover, since the attached part of the airbag module AM that is attached to the frame main part 20b, that is, the case main body 50m, is arranged on the opposite side of the above-mentioned joint part w with the frame main part 20b in between, the joint part w ( Therefore, the supporting member 41) and the case body 50m can be disposed facing each other in a compact manner with the frame main portion 20b in between.

Moreover, the frame main part 20b, which is a plate-shaped wall part sandwiched between the joint part w (therefore, the support member 41) and the case main body 50m, of the side frame 20 is recessed to 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, it is possible to increase the rigidity of the side frame 20 (frame main portion 20b) while reducing the weight of the frame structure, which in turn leads to connection to the side frame 20. The mounting rigidity of each 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 invention. The second embodiment basically has the same sheet structure as the first embodiment, but in addition, when deployed, a portion of the base skin 25 as the first skin adjacent to the fourth fastener f4 (specific connector) is In addition, a structure is added in which an outward protruding part 61 as a contact suppressing part that suppresses contact between the airbag 52 and the fourth fastener f4 is provided along the fourth fastener f4.

In the second embodiment, this outward projecting part (contact suppressing part) 61 has a proximal end joined (for example, sewn) to the base skin 25, that is, the outer peripheral base skin part 25s, and extends outward from the surface of the base skin 25. A sheet-like overhang main body 61m that overhangs on the fourth fastener f4 side (particularly on the fourth fastener f4 side) and a bead-shaped bulge that is integrally connected to the tip of the overhang main body 61m and extends along the fourth fastener f4 The head 61a is provided. 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.

Thus, in the second embodiment, in addition to the above-mentioned effects of the first embodiment, the following effects can also be achieved.

That is, even if the breakage tolerance portion m1 is located relatively close to the fourth fastener f4, the special provision of the outward projecting portion (contact suppression portion) 61 prevents contact between the airbag 52 and the fourth fastener f4 during deployment. Since the airbag 52 can be suppressed, the airbag 52 can be deployed and activated more accurately. Moreover, since the outward projecting part (contact suppressing part) 61, especially the projecting height of the bead-shaped enlarged head 61a at the tip, is higher than the projecting height of the fourth fastener f4, the surface of the base skin 25 With a simple structure in which only the outwardly protruding portion 61 is provided, contact between the airbag 52 and the fourth fastener f4 during deployment can be effectively suppressed.

In the second embodiment, an enlarged head 61a having a bead shape, that is, a substantially circular cross section is integrally formed at the tip of the sheet-like projecting body 61m of the outward projecting part (contact suppressing part) 61. Although the cross-sectional shape of the enlarged head 61a is not limited to that of the second embodiment, it may be any shape that can suppress contact between the airbag 52 and the fourth fastener f4 when deployed. Bye. Further, such an 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.

Further, a third embodiment of the present invention is shown in FIGS. 10 and 11 . In the seat back skin C2 of the first embodiment, the breakage tolerance portion m1 is arranged in the base skin 25 (i.e., the outer peripheral base skin portion 25z) outside the area where the base skin 25 and the easy-to-attach/remove skin 26 overlap. In the third embodiment, the first breakage tolerance portion m1 is provided in the base skin 25 (ie, the right base skin portion 25s) within the above region. The easy-to-attach/remove skin 26 is provided with a second breakable portion m2 that overlaps the first breakable portion m1. The first and second breakage tolerance parts m1 and m2 are located approximately at the front edge, upper edge, and lower edge of the lid plate 50c (therefore, the cover pad P2C) of the module case 50, similar to the breakage tolerance part m1 of the first embodiment. It consists of a series of small holes arranged in a perforated pattern along the length.

Note that the first and second breakage tolerance parts m1 and m2 are similar to the breakage tolerance part m1 of the first embodiment, in the base skin 25 and the easy-to-remove skin 26, while ensuring cover strength that can withstand normal use. Any fragile structure can be used as long as it can be broken by the airbag 52, and various fragile structures can be adopted without being limited to the embodiment. For example, instead of the perforation-like small holes as described above, the base skin 25 and the easy-to-remove skin 26 may be made thinner and more easily torn than other parts, or the parts may be made thinner than other parts. It may be configured such that a longitudinal cut is made and both sides of the cut portion are sewn together with low strength (that is, so as to be easily torn).

Also in the third embodiment, it is possible to achieve basically the same effects as in the first embodiment.

Furthermore, in the third embodiment, even if there is a region on the base skin 25 that overlaps with the easily removable skin 26 and the first breakage tolerance portion m1 is arranged in this region, the first breakage tolerance portion m1 and Since the overlapping second rupture permitting portion m2 is provided in the easily attachable/removable skin 26, there is no possibility that the deployment operation of the airbag 52 will be hindered by the easily attached/detachable skin 26, and this is effective in ensuring accurate operation of the airbag 52. It will be advantageous.

Note that it is also possible to apply the outward projecting portion (contact suppressing portion) 61 of the second embodiment to the structure of the epidermis C2 of the third embodiment, and in that case, the outward projecting portion (contact suppressing portion) 61 of the second embodiment ) 61 is coupled, for example, sewn, to the easily attached and detached skin 26 (specifically, the right easily attached and detached skin 26s).

Although the embodiments of the present invention have been described above, the present invention is not limited to the embodiments, and various design changes can be made without departing from the gist thereof.

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

Furthermore, in the embodiment described above, the airbag module AM is built into the back pad P2 of the seat back portion S2, and the air bag 52 is inflated and deployed from the surface of the back pad P2. The bag module may be built into the seat pad P1 of the seat seat S1, and the airbag may be inflated and deployed from the surface of the seat pad P1. In this case, at least one of the first and second skins (i.e., the base skin 15 and the easy-to-attach/remove skin 16) of the seat skin C1 is provided with a fastener f1' to connect the first and second skins to each other. A breakage tolerance portion m1 is provided at a distance from f4'.

Furthermore, in the embodiment described above, the seat skin C1 and the seat back skin C2 have a two-layer structure in which at least a portion of the base skins 15 and 25 overlap with the easy-to-remove skins 16 and 26, but the present invention Then, the base skin and the easily removable skin may have a single-layer structure in which they do not overlap (for example, see Japanese Patent Application Laid-Open No. 2016-97275). In addition, even in the case of the single-layer structure, the retraction structure of the skin is the same as that of the above embodiment. In addition, in the case of the single-layer structure, a breakage tolerance part m1 is provided on either the base skin (first skin) or the easy-to-attach/remove skin (second skin) at a specific connection point located around the airbag module AM. The fastener (fourth fastener f4) should be spaced apart from the fastener (fourth fastener f4).

Furthermore, in the embodiment described above, each of the base skins 15 and 25 and the easily attached and detached skins 16 and 26 constituting the seat skin C1 and the seat back skin C2 respectively has a thin skin-like single layer structure. In the present invention, at least one of the base skins 15 and 25 and the easily removable skins 16 and 26 has a multilayer structure (for example, a multilayer structure in which a thin cushion sheet material is sandwiched between at least two outer skins that overlap each other). -14628)) may also be used as the epidermis.

Moreover, in the embodiment, the breakage tolerance part m1 that can be broken by the airbag 52 at the initial stage of deployment is provided in the base skin 25 of the seatback skin C2 at a position corresponding to the airbag deployment start part P2x on the surface of the back pad P2 ( In other words, the rupture permitting portion m1 is disposed at a position opposite to the deployment start portion P2x or a position in the vicinity thereof, and the breakage permitting portion m1 is easily and efficiently ruptured. , the position may be any position that allows the air bag 52 to be ruptured at the initial stage of the air bag 52's deployment and allows the air bag 52 to be deployed without difficulty; for example, it may be a position that is somewhat distant from the above-mentioned corresponding position.

Further, in the embodiment, the airbag module AM includes a flat box-shaped module case 50 that houses the folded airbag 52 and the inflator 51. However, in the present invention, a caseless airbag module that does not include a module case (see, for example, Japanese Patent No. 6211839) may be used. In this case, in order to suppress the airbag from inflating toward the front interior of the back pad and properly control the deployment direction of the airbag, a cloth (for example, (see Japanese Patent No. 6211839).

Further, in the embodiment, the first and second connecting members J1 and J2 passing through the lead-in hole P2h are locked to the support member 41 fixed to the inner surface of the side frame 20 (more specifically, the frame main portion 20b). , although the connecting members are shown, in the case of a seat structure in which the lead-in hole P2h and the side frame 20 are close, the support member 41 may be omitted and the first and second connecting members J1 and J2 may be provided on the side frame 20. Alternatively, it may be directly locked and connected to a locked portion (for example, a through hole, a hook-shaped projection, etc.) (not shown).

Furthermore, in the embodiment described above, 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. , any shape is sufficient as long as it can pass through the lead-in hole P2h. For example, the member main body Ja may be made of a rod-shaped material, or the member main body Ja may be made of a flexible material as long as the necessary connection strength can be ensured.

Furthermore, in the embodiment described above, each of the connecting members J1 to J3 is directly connected (sewn) to the retracted portion of the skin C2 (specifically, the base skin 25) into the recess grooves g1 to g3. Each connecting member J1-J3 may be coupled to the retracting portion via an edge reinforcing member (for example, a wire) attached to the retracting portion and extending in the longitudinal direction of the retracting groove g1-g3.

Further, in the above embodiment, a vehicle seat without a seat ventilation air conditioning function was exemplified, but the present invention provides an air passage provided in a seat pad (for example, a seat pad), ), and a duct that connects these air passages and air blowers to provide a seat ventilation and air conditioning function (for example, see PCT International Publication WO2018/061602A2, JP2005-287532, etc.) It is also applicable to In this case, the airbag module AM of this embodiment, the support member 41, the retraction grooves g1 to g3, g1' to g3', the retraction hole P2h, the connecting members J1 to J3, the pressure receiving plate 24, the wave spring 29, and the wire 28 are as follows: It is arranged so as to avoid the above-mentioned ventilation passage, duct, and blower device provided in the seat seat portion S1 or the seat back portion S2.

AM・・・Airbag module
b, n...Bolts and nuts as fixing members
C1...Seat skin
C2 ...Seat back skin
F1... Seat frame
F2...Back frame
f1 to f4: 1st to 4th fasteners as connecting tools
m1 ...Breakage allowable part, first breakage allowable part m2...Second breakage allowable part
P1... Seat pad
P2... Back pad S as a pad 1 ... Seat seat part
S2... Seat back part
S3...Headrest part
20... Side frame as a frame
2 0ba...Concave curved part 25 as a reinforcing part ...Base skin 26 as a first skin...Easy to put on and take off skin as a second skin
30...Car body floor
32... Reclining mechanism
50...Module case
50c...Lid plate
50m...Case body as the attached part
51...Inflator
52...Airbag
53... Holding bag

Claims (10)

a pad (P2); a frame (20) that supports 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 a part of the surface of the pad (P2) directly or through the first skin (25). (26) In a vehicle seat comprising:
The frame (20) is provided with an airbag module (AM) that accommodates an airbag (52) that can be deployed outward from the surface of the pad (P2),
The first skin ( 25) is provided with a breakable part (m1) spaced apart from the connector (f4 ) so as to allow the deployment of the airbag (52). is ,
A region overlapping with the second skin (26) exists on the first skin (25), and in this region, the first breakage tolerance part (m1) is provided on the first skin (25). and a second breakable part (m2) overlapping the first breakable part (m1) is provided in the second skin (26),
The first breakage tolerance part (m1) and the second breakage tolerance part (m2) are provided on a side surface of the pad (P2),
A vehicle seat, characterized in that the connector (f4) is provided behind the first and second tear-permitting parts (m1, m2) in the front-rear direction of the seat. The first breakage permitting portion (m1) and the second breakage permitting portion (m2) are provided forward of a front end of the airbag module (AM) in the front-rear direction of the seat. The vehicle seat according to item 1. The airbag module (AM) includes a box-shaped module case (50) that extends along the outer surface of the frame (20) and is flat in the seat width direction, and is stored and fixed within the module case (50). an inflator (51), an airbag (52) that can be rapidly inflated with high pressure gas from the inflator (51), and a holding bag (53) that holds the airbag (52) in a folded state during normal times. Prepare,
The module case (50) includes a flat dish-shaped case body (50m) that opens toward the outside of the vehicle, and a lid plate (50c) that opens and closes the outer end opening of the case body (50m).
The first breakage tolerance part (m1) and the second breakage tolerance part (m2) are provided forward of the front end of the lid plate (50c) of the module case (50) in the front-rear direction of the seat. The vehicle seat according to claim 1 or claim 2, characterized in that: The first breakage permitting portion (m1) and the second breakage permitting portion (m2) are provided forward of the front end of the frame (20) in the front-rear direction of the seat. The vehicle seat according to any one of claims 1 to 3. A reinforcing part (20ba) is formed in the middle part in the width direction of the frame (20) with the seat front and back direction being the width direction, and the connecting tool (f4) is wider than the reinforcing part (20ba) in the front and back direction of the seat. The vehicle seat according to any one of claims 1 to 4, wherein the vehicle seat is provided at the front. The vehicle seat according to claim 5, wherein the connector (f4) is provided at a position aligned with a front end portion of the reinforcing portion (20ba) in the front-rear direction of the seat. The airbag module (AM) is fixed to the frame (20) by fixing members (b, n), and the connecting tool (f4) is connected to the fixing members (b, n) in the front-rear direction of the seat. The vehicle seat according to any one of claims 1 to 6, characterized in that the vehicle seat is provided in a side-by-side position. The vehicle seat according to any one of claims 1 to 7, wherein the connector (f4) is provided at a position aligned with the front end of the airbag (52) in the front-rear direction of the seat. . The vehicle seat according to any one of claims 1 to 8, wherein the connector (f4) is provided at a position aligned with the front end of the frame (20) in the front-rear direction of the seat. The seat includes a seat portion (S1), a seat back portion (S2), and a headrest portion (S3) attached to an upper portion of the seat back portion (S2),
The seat portion (S1) covers a seat pad (P1), a seat frame (F1) that supports the seat pad (P1) from the back side, and a surface of the seat pad (P1). comprising a seat skin (C1);
The seat frame (F1) is supported by the vehicle body floor (30) so that its longitudinal position can be adjusted via a longitudinal position adjustment mechanism,
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 that covers the surface of the back pad (P2). (C2),
The back frame (F2) is supported by the rear part of the seat frame (F1) via a reclining mechanism (32), and the seat back part (S2) has an upright angle adjusted by the reclining mechanism (32). The vehicle seat according to any one of claims 1 to 9, characterized in that it is configured to be arbitrarily adjustable and fixed.