JP7274879B2 - vehicle seat - Google Patents

Description

BACKGROUND OF THE INVENTION 1. Field of the Invention The present invention relates to a vehicle seat, and more particularly to a vehicle seat provided with a support member provided inside a frame for supporting an occupant and a seat heater.

In a conventional vehicle seat, a plurality of linear metal springs that extend back and forth while meandering left and right are often used as support members that are provided inside the frame of the seat cushion and support the occupant. There were many. However, in recent years, it has been proposed to use a plate-shaped resin member as a support member for a vehicle seat (for example, Patent Document 1). The plate-shaped support member has inclined portions that are inclined upward and extend outward from the left and right side edges of the rear portion of the main body. Further, there is a known vehicle seat in which a seat heater is provided between the upholstery material and the pad (for example, Patent Document 2).

Patent No. 6309130 JP 2018-052498 A

A case where a seat heater is provided in a vehicle seat provided with a plate-shaped support member having left and right inclined portions, and a vehicle provided with a support member having a plurality of linear metal springs extending back and forth while meandering left and right. The stress applied to the seat heater is different from the case where the seat heater is provided on the seat. Therefore, in both cases, in order to prevent the heating wire in the seat heater from being damaged by the stress received from the supporting member, it is necessary to take different considerations from each other. SUMMARY OF THE INVENTION In view of such a background, an object of the present invention is to suppress damage to a heating wire in a vehicle seat having a plate-shaped support member having an inclined portion and a seat heater.

To solve the above problem, at least some embodiments of the present invention provide a vehicle seat (1) having a seat cushion (2) and a seat back (3), wherein the seat cushion and the seat back are A frame-shaped frame (6) provided on at least one side, a support member (7) supported by the frame so as to be positioned in the frame and supporting an occupant, and arranged on the front side of the frame and the support member. a pad (8), a skin material (9) covering the pad, a base cloth (33) arranged between the pad and the skin material, and a heating wire (34) fixed to the base cloth The support member includes a plate-like main body (15) extending substantially parallel to the frame, and a plate-like main body (15) extending outward from left and right side edges of the main body. The left and right side edges of the base fabric are positioned inward in the left-right direction from the left-right outer edge of the inclined portion , and the left-right inner edge of the inclined portion. It is characterized by being positioned outward in the left-right direction .

According to this configuration, since the left and right side edges of the base fabric are positioned inward in the left and right direction from the left and right outer edges of the inclined portion, the left and right side edges of the base fabric are positioned outside the left and right side edges of the inclined portion. The bending load applied to the seat heater is suppressed as compared with the case where the seat heater is positioned toward the side. By suppressing the bending load of the seat heater, damage to the heating wire included in the seat heater is suppressed.

In at least some embodiments of the present invention, in the configuration described above, the support member is formed of resin in which a metal wire (19) is insert-molded, and the wire extends vertically at the center in the left-right direction. a first longitudinal wire (19a) present and a second longitudinal wire (19b) partially passing through said inclined portion (16) and extending longitudinally at the left and right sides thereof, arranged at said inclined portion; and a third vertical wire (19c) extending in the vertical direction outside the second vertical wire (19c) in the horizontal direction, and in the inclined portion, the left and right side edges of the base fabric (33). is located outside the second vertical wire in the horizontal direction and inward relative to the third vertical wire in the horizontal direction. Here, the longitudinal direction means the front-rear or up-down direction along the supporting member.

According to this configuration, since the side vertical wires extend outward in the left-right direction from the base fabric, the bending load applied to the seat heater is suppressed, thereby preventing damage to the heating wire included in the seat heater. Suppressed.

In at least some embodiments of the present invention, in the configuration described above, the wires include horizontal wires (19d to 19g) arranged so as to be at least partially covered by the base fabric and extending in the left-right direction. characterized by

According to this configuration, deformation of the base fabric is suppressed by the horizontal wire, thereby suppressing the load applied to the heating wire.

At least some embodiments of the present invention are characterized in that, in the above configuration, the horizontal wires are present in multiple rows.

According to this configuration, deformation of the base fabric is suppressed by the horizontal wires in the plurality of rows, thereby suppressing the load applied to the heating wire.

In at least some embodiments of the present invention, in the above configuration, the wire has an annular portion covered with the base fabric, and at least a portion of the multiple rows of horizontal wires is a portion of the annular portion. It is characterized by configuring

According to this configuration, deformation of the base fabric is suppressed by the wire formed in the ring shape, thereby suppressing the load applied to the heating wire.

In at least some embodiments of the present invention, in any one of the above configurations, the base fabric has connecting portions (36) bent toward the support member at positions overlapping hanging portions (38) of the upholstery material. ).

According to this configuration, even if the connecting portion is pulled back and forth when the occupant sits on the seat, the stretching of the bent connecting portion reduces the tensile force applied to the connecting portion in the front-rear direction. The load on the heating wire placed in the

In at least some embodiments of the present invention, in the configuration described above, when viewed from a direction perpendicular to the main body of the support member, it is attached to the front side of the support member so as to overlap the hanging portion of the upholstery. It further comprises a pressure sensor (20).

According to this configuration, the pressure sensor is arranged so as to overlap the easily flexible suspension portion, so that the pressure sensor can easily detect the pressure.

In at least some embodiments of the present invention, in any one of the above configurations, the support member has clip attachment holes (25, 26) to which clips (27) are attached, and the base fabric has clip attachment holes (25, 26). It is characterized by not covering the holes.

According to this configuration, the base fabric is less likely to be affected by the stress from the tip of the clip that is attached from the back side of the support member and protrudes to the front side, so the bending load that the seat heater receives is suppressed.

In at least some embodiments of the present invention, in any of the above configurations, the main body of the support member has a plurality of locking holes (22, 23) for locking ends of the upholstery material, The base fabric is arranged to be displaced from the locking hole when viewed from a direction orthogonal to the main body of the support member.

According to this configuration, since the base fabric is displaced from the engaging hole, the operator can easily see the engaging hole, and the work of attaching the end portion of the upholstery material is facilitated.

In at least some embodiments of the present invention, in any one of the above configurations, the left and right side edges of the base fabric are positioned left and right inward from the left and right side edges of the support member.

According to this configuration, the range of the base fabric supported by the supporting member is increased, so that the bending load applied to the seat heater is suppressed.

According to the present invention, since the left and right side edges of the base fabric are positioned inward in the left and right direction from the left and right outer edges of the inclined portion, the left and right side edges of the base fabric are positioned outside the left and right side edges of the inclined portion. The bending load applied to the seat heater is suppressed compared to the case where it is positioned toward the side, thereby suppressing damage to the heating wire included in the seat heater.

According to at least some embodiments of the present invention, the bending load applied to the seat heater is suppressed by extending the side vertical wires outward in the left-right direction from the base fabric. Damage to the included heating wire is suppressed.

According to at least some embodiments of the present invention, the deformation of the base fabric is suppressed by the weft wire, thereby suppressing the load applied to the heating wire.

According to at least some embodiments of the present invention, the load applied to the heating wire is suppressed by suppressing deformation of the base fabric by the multiple rows of transverse wires.

According to at least some embodiments of the present invention, the load applied to the heating wire is suppressed by suppressing deformation of the base fabric by the wire formed in a ring shape.

According to at least some embodiments of the present invention, even if the connecting portion is pulled back and forth by the occupant sitting on the seat, the tensile force in the front-rear direction applied to the connecting portion due to the extension of the bent connecting portion is Since the load is reduced, the load on the heating wire arranged at the connecting portion is suppressed.

According to at least some embodiments of the present invention, the pressure sensor is positioned overlying the flexible hanger to facilitate pressure sensing by the pressure sensor.

According to at least some embodiments of the present invention, the base fabric is not easily affected by the stress from the tip of the clip attached from the back side of the support member and protruding to the front side. is suppressed.

According to at least some embodiments of the present invention, since the base fabric is displaced from the locking holes, it is easier for workers to visually recognize the locking holes, and the work of attaching the ends of the upholstery material is facilitated. Become.

According to at least some embodiments of the present invention, the bending load applied to the seat heater is suppressed because the range of the base fabric supported by the support member is increased.

A perspective view of a seat according to an embodiment The top view of the support member which concerns on embodiment A plan view of a support member and a seat heater according to the embodiment. Sectional view of the hanging portion of the sheet according to the embodiment

BEST MODE FOR CARRYING OUT THE INVENTION Hereinafter, embodiments of the present invention will be described with reference to the drawings. The front-rear, left-right, and up-down directions correspond to the front-rear, left-right, and up-down directions of the vehicle.

As shown in FIG. 1, a seat 1 is used as a driver's seat or a passenger's seat of a vehicle, has a seat cushion 2, a seat back 3 and a headrest 4, is fixed to the floor of the passenger compartment and is covered with a rail cover 5. It is supported by a pair of left and right slide rails (not shown). As shown in FIGS. 2 to 4, the seat cushion 2 includes a frame-shaped frame 6 supported by slide rails, a support member 7 supported by the frame 6 so as to be positioned within the frame 6, the frame 6 and A flexible pad 8 made of urethane foam or the like placed on a support member 7 , a skin material 9 covering the pad 8 , and a seat heater 10 placed between the pad 8 and the skin material 9 . The support member 7 elastically supports the load of an occupant sitting on the seat 1 via the skin material 9 , the seat heater 10 and the pad 8 , and transmits the load to the frame 6 . The frame 6, the support member 7, the pad 8, the skin material 9 and the seat heater 10 form a substantially mirror-image symmetrical shape with respect to the center plane perpendicular to the left-right direction.

The frame 6 includes a pair of left and right side members 11, 11, a front cross member 12 connecting front ends of the pair of left and right side members 11, 11, and a rear end of the pair of left and right side members 11, 11. It has a rear cross member 13 to be connected, and a pan frame 14 which is connected to the front end portions of the pair of left and right side members 11 , 11 and whose left and right intermediate portions are located forward of the front cross member 12 . The pair of left and right side members 11, 11 are long members made of sheet metal that are elongated in the front-rear direction, and flanges are formed on the upper and lower sides. The front cross member 12 and the rear cross member 13 are made of metal pipes extending in the left-right direction. The pan frame 14 is made of sheet metal and has a surface generally along the front portion of the seat surface.

As shown in FIG. 2, the support member 7 includes a plate-like main body 15 that extends substantially parallel to the frame 6, and a rear portion 15a of the main body 15 that extends outward from left and right side edges while being inclined to the front side. An inclined portion 16 , a front mounting portion 17 extending forward from the front edge of the main body 15 and engaging the front cross member 12 , and a rear cross member 13 extending obliquely upward and rearward from the rear edge of the main body 15 . and a mating rear mounting portion 18 . The front side of the main body 15 is slightly slanted upward with respect to the rear portion 15a from the intermediate position in the front-rear direction. The support member 7 is made of resin in which a metal wire 19 is insert-molded. The front mounting portion 17 is engaged with the front cross member 12 from above, and has a mounting piece located in the center in the left-right direction and a pair of mounting pieces located near the left and right ends. The rear mounting portion 18 is engaged with the rear cross member 13 from above, and has a mounting piece located in the center in the left-right direction and a pair of mounting pieces located near the left and right ends. As described above, the front mounting portion 17 and the rear mounting portion 18 are each separated into three parts, so that they can be easily mounted to the front cross member 12 and the rear cross member 13 .

Seat 1 (see FIG. 1) employs a seat belt reminder (SBR) system that warns if the occupant is seated but not wearing a seat belt. 20 is installed. The pressure sensor 20 is mounted on the front side of the central portion in the left-right direction near the boundary between the front portion 15b and the rear portion 15a of the main body 15. As shown in FIG. A pressure sensor 20 detects pressure applied to the seat cushion 2 in order to determine whether or not the passenger is seated on the seat 1 . Since the load of the occupant is dispersed by the inclined portion 16, the rear portion 15a of the main body 15 receives less pressure when the passenger is seated. Therefore, the pressure sensor 20 is preferably arranged at a position shifted forward with respect to the inclined portion 16 or at a position aligned with the front end of the inclined portion 16 so as not to be affected by pressure distribution by the inclined portion 16 . This improves the accuracy of seating determination by a seating determination means (not shown) such as an ECU that receives a signal from the pressure sensor 20 .

A rear portion 15a of the main body 15 has a through hole for engaging a plurality of hooks 21 (see FIG. 4) attached to the rear end portion of the upholstery 9 and for adjusting the deflection of the support member 7. A central locking hole 22 positioned in the center in the left-right direction and a pair of side locking holes 23, 23 positioned on the left and right of the central locking hole 22 are provided. The central locking hole 22 and the pair of side locking holes 23, 23 each form a rectangle in plan view. The central locking hole 22 and the pair of side locking holes 23, 23 aligned in the horizontal direction have the same width in the front-rear direction, but the central locking hole 22 has the same length in the horizontal direction. It is longer than the side locking holes 23 , 23 . Therefore, the flexibility of the central portion of the support member 7 is increased, and the sitting comfort is improved. By making the length of the central locking hole 22 and the lengths of the pair of side locking holes 23, 23 different from each other in this way, the deflection of the support member 7 is set so as to improve the seating comfort. Further, since the first vertical wire 19a extends vertically through the center of the center locking hole 22 in the left-right direction, the strength around the center locking hole 22 is reinforced. Since the rear end side of the upholstery material 9 can be locked to the support member 7, there is no need to provide the frame 6 with a projecting piece or the like for forming a locking portion, and the frame 6 can be made smaller and lighter.

Hook recesses 24 recessed toward the back side are provided at the rear edge portions of the central locking hole 22 and the pair of side locking holes 23 , 23 on the front side of the main body 15 . The hook 21 passes through the corresponding central locking hole 22 or side locking hole 23 from the back side to the front side, and the tip of the hook 21 is received in the hook concave portion 24 . By receiving the tip of the hook 21 in the hook concave portion 24 , the hook 21 can be positioned with respect to the central locking hole 22 and the side locking holes 23 . In addition, the central locking hole 22 and the side locking holes 23 are provided at positions aligned with the pair of left and right inclined portions 16, 16 in the main body 15, that is, at positions with relatively high rigidity. Deformation of 22 and side locking holes 23 can be suppressed, and dropping off of hooks 21 from central locking holes 22 and side locking holes 23 can be prevented.

A first clip mounting hole 25 is formed through the inclined portion 16 vertically. Second clip mounting holes 26 are formed through the main body 15 in the vertical direction on both left and right sides of the front portion 15 b of the main body 15 . A clip 27 holding another member can be attached from the back side to the first clip attachment hole 25 and the second clip attachment hole 26 . If the tip of the clip 27 protrudes from the surface of the support member 7, it may adversely affect the comfort of sitting. In order to prevent this, the first clip attachment hole 25 is formed in a concave portion 28 provided in the inclined portion 16 and recessed toward the back side. The second clip attachment holes 26 provided at the rear of the left and right side portions of the front portion 15b are provided with flanges 29 projecting upward from the left and right side edges of the front portion 15b and inclined upward. By being positioned near the sloped portion 16, the influence of the tip of the clip 27 protruding to the surface is reduced. In addition, since the second clip mounting holes 26 provided in front of the right and left sides of the front portion 15b are formed in recesses 30 shallowly recessed toward the back side, the influence of the tip of the clip 27 projecting to the surface is eliminated. mitigated.

Side cutouts 31 are formed in the left and right side edges of the support member 7 at the front of the inclined portion 16 and at the rear end of the front portion 15 b of the main body 15 . By providing the side notches 31, the support member 7 can be made smaller and lighter.

The side cutouts 31 are provided, and the intermediate portions in the front-rear direction of both the left and right edges of the front portion 15b are positioned outside the left and right edges of the front attachment portion 17 in the left-right direction. Wing portions 32 are formed extending to both left and right sides. Unlike the inclined portion 16, the wing portion 32 is not inclined with respect to the intermediate portion in the left-right direction of the front portion 15b.

A plurality of wires 19 embedded in the resin that constitutes the support member 7 extend in the vertical direction (the front-rear direction along the support member) and the horizontal direction (the left-right direction along the support member). is increasing. In the illustrated example, the wire 19 includes a first vertical wire 19a extending vertically at the center in the left-right direction, a second vertical wire 19b extending vertically at the side portion in the left-right direction, and a first clip mounting hole 25. A third longitudinal wire 19c extending longitudinally on the left and right outer sides of the front part 15b, a first lateral wire 19d extending laterally on the front side of the front part 15b, and a third longitudinal wire 19d laterally extending so as to pass through the front side of the rear part 15a. 2 lateral wires 19e, a third lateral wire 19f laterally extending through the middle portion of the rear portion 15a in the longitudinal direction, a fourth lateral wire 19g laterally extending so as to pass through the rear side of the rear portion 15a, A fifth horizontal wire 19h extending laterally in front of and behind the first clip attachment hole 25 is included. The second longitudinal wire 19b partially passes through the inclined portion 16, and both ends of the second to fourth horizontal wires 19e-f are located within the inclined portion 16. As shown in FIG. Any two of the first and second vertical wires 19a and 19b and any two of the first to fourth horizontal wires 19d-g make the wire 19 loop. The first clip attachment hole 25 is surrounded by a portion of the second vertical wire 19b, the third vertical wire 19c, and the fifth horizontal wire 19h.

As shown in FIG. 3, the seat heater 10 is fixed to a base cloth 33 that partially covers the top of the support member 7 and the pan frame 14 with the pad 8 (see FIG. 4) interposed therebetween, and the base cloth 33. It has a heating wire 34 . The base fabric 33 has two front and rear main portions 35, 35 extending generally along the seat surface, and a pair of left and right connecting portions 36, 36 connecting the two front and rear main portions. An opening 37 is defined in the center of the base fabric 33 by the two front and rear main portions 35 , 35 and the pair of left and right connecting portions 36 , 36 . The heating wire 34 extends back and forth while meandering left and right so as to be folded back on the front end side of the base cloth 33. properly connected.

The front edge of the base cloth 33 is positioned rearward of the front edge of the pan frame 14 , and the rear edge of the base cloth 33 is positioned forward of the central locking hole 22 and the side locking holes 23 . Since the base cloth 33 does not cover the center locking hole 22 and the side locking holes 23, the worker can easily see the center locking hole 22 and the side locking holes 23, and the rear end of the skin material 9 can be easily seen. The workability of attaching the hook 21 attached to the portion to the central locking hole 22 and the side locking hole 23 is improved. The left and right side edges of the base fabric 33 are positioned left and right inward from the left and right side edges of the support member 7 and the pan frame 14 . As described above, the edges of the base fabric 33 are located inside the left and right side edges and the rear edge of the support member 7 and the front edge of the pan frame. and the pan frame 14, and the left and right side edges of the base fabric 33 are located outside the left and right side edges of the support member 7 and the pan frame 14, the bending load applied to the seat heater 10 is suppressed. be.

Further, the left and right side edges of the base fabric 33 are positioned inward in the left and right direction from the first and second clip mounting holes 25 and 26 . Therefore, the base cloth 33 that does not cover the first and second clip mounting holes 25 and 26 will have unevenness caused by the tip of the clip 27 and the concave portions 28 and 30 around the first and second clip mounting holes 25 and 26 . Therefore, the bending load applied to the seat heater 10 is reduced.

The left and right side edges of the base fabric 33 are located outside the second vertical wire 19b in the left and right direction, the front edge of the base fabric is located forward of the first horizontal wire 19d, and the rear edge of the base fabric is located in front of the first horizontal wire 19d. , the third transverse wire 19f, preferably behind the fourth transverse wire 19g. Further, when any two of the first vertical wire 19a and the pair of second vertical wires 19b, 19b are combined with any two of the first to fourth horizontal wires 19d to 19g, an annular becomes. The base cloth 33 covers the first and second vertical wires 19a, 19b and the first to third or fourth horizontal wires 19d to 19g which are arranged in the main body 15 or the inclined portion 16 at positions close to the main body 15. By arranging them or by arranging these wires 19 in a ring shape, the deformation of the base fabric 33 is suppressed and the load applied to the heating wire 34 is suppressed. The third vertical wires 19c arranged on the inclined portion 16 are positioned outside the left and right side edges of the base fabric 33 in the left-right direction. As a result, the bending load applied to the seat heater 10 is suppressed.

As shown in FIG. 4 , the connecting portion 36 bends at the hanging portion 38 of the upholstery 9 and protrudes into the seat cushion 2 . Therefore, even if the connecting portion 36 is pulled forward and backward by the passenger sitting on the seat 1, the stretching of the bent connecting portion 36 reduces the tensile force applied to the connecting portion 36 in the front-rear direction. Therefore, the load on the heating wire 34 positioned at the connecting portion 36 is suppressed.

A hook 21 is provided at the lower end of the hanging portion 38 of the upholstery 9 . The hook 21 is locked by a linear locking member 39 attached to the frame 6 or the support member 7 . The suspending portion 38 is arranged so as to overlap the pressure sensor 20 in plan view. Since the hanging portion 38 is relatively easy to bend when the occupant is seated, the stress transmitted to the pressure sensor 20 arranged below the hanging portion 38 increases, and the pressure sensor 20 can easily detect the pressure. Further, in order to suppress the influence of the heat generated from the heating wire 34 on the pressure sensor, the opening 37 of the base cloth 33 is arranged so as to overlap the pressure sensor 20 in plan view.

As described above, since the bending load of the seat heater 10 and the load on the heating wire 34 are suppressed, damage to the heating wire 34 is suppressed.

Although the specific embodiments have been described above, the present invention is not limited to the above embodiments and can be widely modified. For example, the main portion of the base fabric may be three or more, or two main portions adjacent to each other in the front and rear may be connected by one or three or more connecting portions. The configuration of the above embodiment may be applied to a seat back, or to a seat of a vehicle other than a vehicle, such as an airplane.

1: Seat 2: Seat cushion 3: Seat back 6: Frame 7: Support member 8: Pad 9: Skin material 10: Seat heater 15: Main body 16: Inclined portion 19: Wire (19a: first vertical wire, 19b: second 2 vertical wires, 19c: third vertical wire, 19d: first horizontal wire, 19e: second horizontal wire, 19f: third horizontal wire, 19g: fourth horizontal wire, 19h: fifth horizontal wire)
20: pressure sensor 21: hook 22: central locking hole 23: side locking hole 25: first clip mounting portion 26: second clip mounting portion 27: clip 33: base cloth 34: heating wire 36: connecting portion 38 : Hanging part

Claims (10)

A vehicle seat having a seat cushion and a seat back,
a frame-shaped frame provided on at least one of the seat cushion and the seat back;
a support member supported by the frame so as to be positioned within the frame and supporting an occupant;
a pad disposed on the front side of the frame and the support member;
a skin material covering the pad;
A seat heater having a base fabric arranged between the pad and the skin material, and a heating wire fixed to the base fabric,
The support member has a plate-like main body extending substantially parallel to the frame, and inclined portions extending outward from left and right side edges of the main body while being inclined toward the front side,
The left and right side edges of the base fabric are positioned laterally inward from the lateral outer edge of the inclined portion and laterally outward from the lateral inner edge of the inclined portion. A vehicle seat characterized by: The support member is formed of a resin in which a metal wire is insert-molded,
The wires include a first longitudinal wire extending longitudinally at the center in the lateral direction, a second longitudinal wire partially passing through the inclined portion and longitudinally extending at the side portion in the lateral direction, and a third vertical wire arranged on the inclined portion and extending in the vertical direction outside the second vertical wire in the left-right direction;
In the inclined portion, both left and right side edges of the base fabric are positioned laterally outward of the second vertical wire and laterally inward of the third vertical wire. The vehicle seat according to claim 1. 3. The vehicle seat according to claim 2, wherein said wires include transverse wires arranged so as to be at least partially covered by said base fabric and extending in the left-right direction. 4. The vehicle seat according to claim 3, wherein said transverse wires are present in a plurality of rows. 5. The vehicle according to claim 4, wherein the wire has an annular portion covered with the base fabric, and at least a portion of the plurality of rows of the transverse wires form a portion of the annular portion. sheet for. The vehicle seat according to any one of claims 1 to 5, wherein the base fabric has a connection portion bent toward the support member at a position overlapping the hanging portion of the upholstery material. . 7. The apparatus according to claim 6, further comprising a pressure sensor attached to the front side of the support member so as to overlap the hanging portion of the skin material when viewed from a direction perpendicular to the main body of the support member. Vehicle seat as described. The support member has a clip attachment hole to which a clip is attached,
The vehicle seat according to any one of claims 1 to 7, wherein the base fabric does not cover the clip mounting holes. the main body of the support member has a plurality of locking holes for locking ends of the skin material;
The vehicle seat according to any one of claims 1 to 8, wherein the base fabric is arranged to be displaced from the locking hole when viewed from a direction orthogonal to the main body of the support member. . The vehicle seat according to any one of claims 1 to 9, wherein the left and right side edges of the base fabric are positioned left and right inward from the left and right side edges of the support member.

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