阅读说明：本技术 交通工具用座椅 (Vehicle seat ) 是由 大沼弘治 龟井聪一郎 岛津将树 中岛启 长友广光 福田优树 水越敏充 御园生大嗣 于 2020-02-03 设计创作，主要内容包括：本发明提供一种交通工具用座椅,包括具有倾斜部的板状的支承部件和配置于支承部件的压力传感器,提高了就座判定的正确性。座椅垫具有：框形的框架(7)；以及支承部件(8),其支承于框架(7),并弹性地支承乘员。支承部件(8)具有：板状的主体(20)；以及倾斜部(21),其从主体(20)的后部的左右侧缘朝表面侧倾斜地向外侧延伸。倾斜部(21)使来自乘员的臀部的压力分散。压力传感器相对于倾斜部向前方错开地配置,以免受到倾斜部(21)的压力分散的影响。在压力传感器(25)的安装位置的左右设置有开口。压力传感器和开口从主体的前缘分离。在将主体安装于框架的前部安装部与压力传感器之间设置有连结部。(The invention provides a vehicle seat, which comprises a plate-shaped supporting member with an inclined part and a pressure sensor arranged on the supporting member, and improves the accuracy of sitting judgment. The seat cushion is provided with: a frame (7) in the shape of a frame; and a support member (8) that is supported by the frame (7) and elastically supports the occupant. The support member (8) has: a plate-shaped main body (20); and inclined portions (21) extending outward from the left and right side edges of the rear portion of the main body (20) so as to be inclined toward the front side. The inclined portion (21) disperses the pressure from the hip of the occupant. The pressure sensor is arranged offset forward relative to the inclined part so as to be free from the influence of pressure dispersion of the inclined part (21). Openings are provided on the left and right sides of the mounting position of the pressure sensor (25). The pressure sensor and the opening are separated from a leading edge of the body. A connection portion is provided between a front attachment portion for attaching the main body to the frame and the pressure sensor.)

1. A vehicle seat having a seat cushion,

the vehicle seat is characterized by comprising:

a frame-shaped frame provided to the seat cushion and having a pair of left and right side members and a front cross member and a rear cross member respectively connecting front and rear corresponding end portions of the side members;

a support member for supporting an occupant, the support member being supported by the frame so as to be positioned inside the frame, the support member including: a plate-shaped main body extending substantially parallel to the frame; an inclined portion extending outward from a part of left and right side edges of the main body to be inclined toward a front surface side; a front mounting portion that extends from a front edge of the main body and engages with the front cross member; and a rear mounting portion extending from a rear edge of the main body and engaged with the rear cross member;

a gasket disposed on the front surfaces of the frame and the support member;

a skin material covering the pad; and

a pressure sensor mounted on the front surface side of the main body of the support member and located forward of the inclined portion,

the pressure sensor is aligned with a portion of the front mounting portion in the front-rear direction,

the main body of the support member has openings provided on both right and left sides of the pressure sensor and a connecting portion connecting the pressure sensor and the part of the front attachment portion,

the pressure sensor and the opening exit from the leading edge of the body.

2. The vehicle seat according to claim 1,

the support member is formed of a resin insert-molded from a metal wire material,

the joint includes a portion of the wire.

3. The vehicle seat according to claim 2,

the wires include longitudinal wires extending in the front-rear direction and transverse wires extending in the left-right direction,

at least a part of the longitudinal wires and at least a part of the transverse wires pass through the connecting portion.

4. The vehicle seat according to claim 3,

the at least a portion of the crosswire includes a first portion passing from the junction and a second portion extending along a rim of the opening,

the at least one portion of the cross-wire is bent such that the first portion is disposed forward of the second portion.

5. The vehicle seat according to claim 4,

the at least a portion of the longitudinal wire includes a portion that intersects the first portion of the transverse wire and extends below the pressure sensor and the front mount.

6. The seat for vehicle according to any one of claims 1 to 5,

the center of the pressure sensor and the connecting portion is located inside a triangle connecting the center of the rear edge of the front mounting portion in the left-right direction and the inner side of the front edge of the inclined portion in the left-right direction in a plan view.

7. The seat for vehicle according to any one of claims 1 to 5,

the pressure sensor is disposed so as to be shifted from a mounting position of the skin material in a plan view.

Technical Field

The present invention relates to a vehicle seat, and more particularly, to a vehicle seat having a support member provided inside a frame to support an occupant.

Background

Among vehicle seats, the following are known: a support member provided inside a seat cushion frame to support an occupant is formed as a resin member which is insert-molded from a metal wire (for example, patent document 1). The support member has inclined portions extending outward from the left and right side edges of the rear portion of the main body in an inclined manner upward. Since the inclined portion supports the hip of the occupant from an oblique side, the supporting force for the hip of the occupant is dispersed. Further, among vehicle seats, the following are known: in order to confirm seating of an occupant, a pressure sensor is provided between the support member and the cushion (for example, patent document 2).

Disclosure of Invention

Problems to be solved by the invention

When the pressure sensor is provided in the support member having the inclined portion, the pressure from the hip of the occupant is dispersed by the inclined portion and transmitted to the support member. Therefore, the pressure applied to the pressure sensor is reduced, and there is a possibility that the pressure generated by sitting and the pressure generated by placing the luggage in the seat cannot be distinguished.

In view of the above background, an object of the present invention is to provide a vehicle seat having a plate-shaped support member having an inclined portion and a pressure sensor disposed on the support member, in which the accuracy of seating determination is improved.

Means for solving the problems

In order to achieve the above object, one embodiment of the present invention is a vehicle seat 1 having a seat cushion 2, the vehicle seat including: a frame 7 provided in the seat cushion and having a pair of left and right side members 14, and a front cross member 15 and a rear cross member 16 connecting front and rear ends of the side members, respectively; a support member 8 for supporting an occupant, which is supported by the frame so as to be positioned inside the frame, and which includes: a plate-like main body 20 extending substantially parallel to the frame; an inclined portion 21 extending outward from a part of the left and right side edges of the main body so as to be inclined toward the front surface side; a front attachment portion 22 that extends from a front edge of the main body and engages with the front cross member; and a rear mounting portion 23 extending from a rear edge of the main body and engaged with the rear cross member; a gasket 9 disposed on the front side of the frame and the support member; a skin material 10 covering the pad; and a pressure sensor 25 mounted on a front surface side of the main body of the support member and located forward of the inclined portion, the pressure sensor being aligned with a part of the front mounting portion in a front-rear direction, the main body of the support member having openings 27 provided on both right and left sides of the pressure sensor, the pressure sensor and the openings being spaced apart from the front edge of the main body, and a connecting portion 59 connecting the pressure sensor and the part of the front mounting portion.

According to this configuration, since the pressure sensor is disposed offset in the front-rear direction with respect to the inclined portion, the pressure sensor is not affected by the pressure dispersion of the inclined portion, and the opening does not support a load, the pressure of the pressure sensor becomes relatively high, and the accuracy of the seating determination by the seating determination means such as the ECU receiving a signal from the pressure sensor is improved. Further, since the mounting position and the opening are separated from the longitudinal end edge of the main body of the support member, and the connection portion is present between the pressure sensor and the front mounting portion, a decrease in rigidity due to the opening is suppressed.

In the above configuration, the support member is formed of a resin insert-molded from a metal wire 24, and the coupling portion includes portions 24a and 24c of the wire.

According to this structure, the rigidity of the connection portion and its periphery lowered by the provision of the opening is compensated by the wire material.

In the above configuration, the wire members include vertical wire members 24a, 24b extending in the front-rear direction and horizontal wire members 24c, 24d, 24e extending in the left-right direction, and at least a part 24a of the vertical wire members and at least a part 24c of the horizontal wire members pass through the connecting portion.

According to this structure, the connecting portion is reinforced by the vertical wires and the horizontal wires in the front-rear direction and the left-right direction.

In the above configuration, the at least one portion of the cross-wire includes a first portion 24ca that passes through the connecting portion and a second portion 24cb that extends along an edge of the opening, and the at least one portion of the cross-wire is bent such that the first portion is arranged forward relative to the second portion.

According to this configuration, the vicinity of the opening is reinforced by the second portion of the lateral wire, and the coupling portion is further reinforced at both left and right sides of the support member by the curved shape of the lateral wire.

In one embodiment of the present invention, in the above configuration, the at least one portion of the longitudinal wire includes a portion that intersects the first portion of the lateral wire and extends below the pressure sensor and the front attachment portion.

According to this structure, the support member supported by the frame is stabilized by the vertical wire, and the connection portion is further reinforced.

In one embodiment of the present invention, in any one of the above configurations, a center of the pressure sensor and the connecting portion is located inside a triangle 60 connecting a center of a rear edge of the front portion mounting portion in a left-right direction and a front edge of the inclined portion in the left-right direction, in a plan view.

According to this configuration, the pressure sensor is disposed at a position where it is easy to detect seating of an occupant, and the coupling portion is disposed at a position where it is balanced in the right and left directions, so that the pressure sensor is stabilized.

In one embodiment of the present invention, in any one of the above configurations, the pressure sensor is disposed so as to be shifted from a position where the skin material is hung in a plan view.

According to this configuration, since the attaching position of the pressure sensor and the skin material is shifted, the influence of attaching the skin material on the pressure sensor can be suppressed.

The pressure sensor needs to be configured to easily detect the pressure generated by the load of the occupant. In addition, in the conventional vehicle seat, when the wire harness electrically connected to the pressure sensor is fixed to the back surface of the support member by the clip, the clip may be easily detached by a load of the occupant. An object of one embodiment of the present invention is to provide a vehicle seat having a plate-shaped support member formed by insert-molding a metal wire material and a pressure sensor disposed on the support member, in which the pressure sensor easily detects pressure and the clip is less likely to fall off.

In order to achieve the above object, one embodiment of the present invention is a vehicle seat 101 having a seat cushion 102, the vehicle seat comprising: a frame-shaped frame 107 provided to the seat cushion and having a pair of left and right side members 114 and a front cross member 115 and a rear cross member 116 connecting front and rear corresponding ends of the side members, respectively; a support member 108 for supporting the occupant, which is formed of a resin insert-molded from a metal wire 124, is supported by the frame so as to be positioned in the frame, and includes: a plate-shaped main body 120 extending substantially parallel to the frame; a front attachment portion 122 that extends from a front edge of the main body and engages with the front cross member; and a rear mounting portion 123 extending from a rear edge of the main body and engaged with the rear cross member; a pad 109 disposed on the front side of the frame and the support member; a skin material 110 covering the pad; and a pressure sensor 125 attached to a front surface side of the support member so as to overlap a part of the wire in a plan view, wherein the main body of the support member has a plurality of clip attachment portions 135 at positions not overlapping the wire in a plan view, and the clip attachment portions 135 are capable of attaching clips for holding a wire harness 127a electrically connected to the pressure sensor.

According to this configuration, since the pressure sensor is disposed on the wire rod having higher rigidity than the resin, the portion on which the pressure sensor is mounted is relatively small in deflection when the load of the occupant is applied, and a relatively large pressure is applied to the pressure sensor, so that the pressure sensor can easily detect the pressure. Further, when the vicinity of the wire rod supports the load of the occupant with a relatively large force, the clip holding the wire harness electrically connected to the pressure sensor is attached to the clip attachment portion provided at a position not overlapping with the wire rod in a plan view, and therefore, the clip is prevented from falling off by the load of the occupant.

An embodiment of the present invention is characterized in that, in the above-described structure, the wire includes a plurality of longitudinal wires 124a, 124b extending in the front-rear direction, and at least a part of the clip mounting portion is located between the plurality of longitudinal wires.

According to this structure, the space between the vertical wires can be effectively utilized.

In one embodiment of the present invention, in the above configuration, the vertical wire includes: a center longitudinal wire 124a located at the left and right centers so as to partially overlap the pressure sensor in a plan view; and a pair of right and left side vertical wires 124b passing through the side portions of the support member, at least half of the clip attachment portions provided between the central vertical wire and each of the side vertical wires being positioned on the right and left outer sides of the center between the vertical wires and each of the side vertical wires.

According to this structure, since the clip attachment portions are disposed in a large number on the side portion longitudinal wire side where the influence of the load of the occupant is small, the influence of the load of the occupant on the clip is suppressed.

In one embodiment of the present invention, in the above-described configuration, the clip attaching portions include holes that vertically penetrate the support member, and when the main body of the support member is divided into a central region a and two left and right side regions B by trisecting a width in the left-right direction of a portion having a maximum width in the left-right direction, the number of the clip attaching portions included in each of the side regions is larger than the number of the clip attaching portions included in the central region.

According to this configuration, the through hole constituting the clip attachment portion is provided in the support member, whereby the rigidity of the support member is reduced, but the reduction in rigidity in the central region close to the pressure sensor can be suppressed.

An embodiment of the present invention is characterized in that, in any of the above-described structures, the wire includes a plurality of lateral wires 124c extending in the left-right direction, and at least a part of the clip mounting portion is located between the plurality of lateral wires.

According to this structure, the space between the horizontal wires can be effectively utilized.

In the above configuration, the support member has inclined portions 121 extending obliquely outward from the left and right side edges of the rear portion of the main body toward the front surface side, and at least a part of the clip mounting portion is disposed forward of the inclined portions and rearward of the pressure sensor.

According to this structure, since the inclined portion is located above the main body, the load of the occupant is less likely to be applied to the clip by disposing the clip mounting portion in the region.

In the above configuration, the main body is located below an upper end of the front attachment portion, and at least a part of the clip attachment portion is located inside a triangle C connecting a center of a rear edge of the first attachment portion in a lateral direction and a front edge of the inclined portion in the lateral direction when viewed in plan.

According to this configuration, since the first mounting portion and the inclined portion are located above the main body, the load of the occupant is less likely to be applied to the clip by disposing the clip mounting portion in the triangular region surrounded by the first mounting portion and the inclined portion.

In one embodiment of the present invention, in any one of the above configurations, the main body of the support member has an opening 128, and the wire harness is routed below the support member and attached to the clip so as to overlap the opening in a plan view.

According to this configuration, the mounted state of the wire harness routed on the back side of the support member can be confirmed from above through the opening.

One embodiment of the present invention is a vehicle V having any one of a pair of right and left structures, wherein in the support member of each vehicle seat, the plurality of clip attachment portions are arranged symmetrically on the right and left with respect to a center line extending in the front-rear direction at the center of the right and left sides in a plan view.

According to this configuration, when the two seats use the common support member, the wire harness or the like attached to the support member via the clip can be arranged in a bilaterally symmetrical shape in the two seats.

Effects of the invention

According to the present invention, since the pressure sensor is disposed offset in the longitudinal direction with respect to the inclined portion, the pressure sensor is not affected by the pressure dispersion by the inclined portion, and the opening does not support the load, the pressure of the pressure sensor is relatively increased, the accuracy of the seating determination by the seating determination unit such as the ECU receiving the signal from the pressure sensor is improved, the mounting position and the opening are separated from the longitudinal end edge of the main body of the support member, and the connecting portion is present between the pressure sensor and the front mounting portion, so that the decrease in rigidity due to the opening is suppressed.

According to one embodiment of the present invention, the rigidity of the connection portion and its periphery lowered by the provision of the opening is compensated by the wire material.

According to one embodiment of the present invention, the connecting portion is reinforced by the vertical wires and the horizontal wires in the front-rear direction and the left-right direction.

According to one embodiment of the present invention, the vicinity of the opening is reinforced by the second portion of the lateral wire, and the coupling portion is further reinforced at both left and right sides of the support member by the curved shape of the lateral wire.

According to one embodiment of the present invention, the support member supported by the frame is stabilized by the longitudinal wire, and the connection portion is further reinforced.

According to one embodiment of the present invention, the center of the pressure sensor and the coupling portion is located inside a triangle connecting the center of the rear edge of the front attachment portion in the left-right direction and the inside of the front edge of the inclined portion in the left-right direction in a plan view, whereby the pressure sensor is disposed at a position where the seating of the occupant is easily detected and the coupling portion is disposed at a position where the left and right are balanced, whereby the pressure sensor is stabilized.

According to one embodiment of the present invention, since the attachment position of the pressure sensor and the skin material is shifted, the influence of the attachment of the skin material on the pressure sensor can be suppressed.

Drawings

Fig. 1 is a side view of the seat according to the first and second embodiments.

Fig. 2 is a perspective view of the frame and the support member of the first embodiment.

Fig. 3 is a vertical cross-sectional view of the periphery of the inclined portion and the cover member of the first embodiment, as viewed through the rear surface of the cylindrical portion (the gasket is not shown).

Fig. 4 is an enlarged plan view of the side portion and the side frame of the support member according to the first embodiment.

Fig. 5A to 5C are views showing engagement of the cover material with the support member according to the first embodiment (fig. 5A is a plan view, fig. 5B is a cross-sectional view, and fig. 5C is a cross-sectional view of a modification).

Fig. 6 is an enlarged perspective view of the inclined portion of the first embodiment (illustration of the cover member is omitted).

Fig. 7 is a rear view of the periphery of the inclined portion of the first embodiment.

Fig. 8 is a rear right perspective view of the frame and the support member of the first embodiment.

Fig. 9 is a rear view of the cushion in the seat back of the first embodiment.

Fig. 10 is a perspective view of the side frame of the seat back as viewed from the front inside of the first embodiment.

Fig. 11 is a bottom view of the inclined portion of the modification of the first embodiment.

Fig. 12 is a plan view of the front portion of the support member of the first embodiment.

Fig. 13 is a plan view of the frame and the support member according to the second embodiment.

Fig. 14 is a perspective view of the front portion of the support member of the second embodiment.

Description of the reference symbols

1: a seat;

2: a seat cushion;

5: a floor;

7: a frame;

8: a support member;

14: a side beam;

15: a front cross member (first cross member);

16: a rear cross member (second cross member);

20: a main body;

21: an inclined portion;

22: a front mounting portion (first mounting portion);

23: a rear mounting portion (second mounting portion);

25: a pressure sensor;

26: a sensor mounting portion;

27: an opening for air;

50: a front portion;

50 c: a recess;

51: a curved portion.

Detailed Description

Embodiments of the present invention will be described below with reference to the drawings. The front-rear, left-right, and up-down directions are the front-rear, left-right, and up-down directions of the vehicle V.

< first embodiment >

As shown in fig. 1, the seat 1 is used as a driver's seat or a front passenger's seat of a vehicle V, and includes a seat cushion 2, a seat back 3, and a headrest 4. The seat cushion 2 is supported by a pair of left and right slide rails 6, 6 fixed to a vehicle floor 5 so as to be slidable back and forth. The seat 1 further includes a flexible pad 9 made of urethane foam or the like disposed on the frame 7 and the support member 8 (see fig. 2), and a cover material 10 covering the pad 9. The slide rail 6 has: a lower rail 11 coupled with the floor 5; an upper rail 12 supported by the lower rail 11 so as to be slidable back and forth; and a rail cover 13 (refer to fig. 3) covering at least a part of the upper rail 12.

As shown in fig. 2, the seat cushion 2 includes: a frame 7 in a frame shape; and a support member 8 supported by the frame 7 so as to be positioned inside the frame 7, and elastically supporting a load of an occupant of the seat 1 via a skin material 10 and a cushion 9 (see fig. 1).

The frame 7 has: a pair of left and right side members 14, 14; a front cross member 15 connecting front end portions of the pair of left and right side members 14, 14 to each other; a rear cross member 16 connecting rear end portions of the pair of left and right side members 14, 14 to each other; and a cradle 17 connected to front end portions of the pair of left and right side members 14, 14 and having left and right intermediate portions located forward of the front cross member 15. The pair of left and right side members 14, 14 are long members made of metal plates and extending in the front-rear direction, and have flanges formed in the upper and lower directions. The side member 14 is supported by the upper rail 12 via a base member 65 (see fig. 3). The front cross member 15 and the rear cross member 16 are formed of metal pipes extending in the left-right direction. The cradle 17 is made of a metal plate and has a front surface substantially along the seat surface. As shown in fig. 4, a position sensor 19 that detects the front-rear direction position of the seat 1 with respect to the floor 5 is attached to the right side member 14.

As shown in fig. 2, the support member 8 is supported by the frame 7 so as to be positioned inside the frame 7. The support member 8 includes: a plate-like main body 20 extending substantially parallel to the frame 7; an inclined portion 21 extending outward from the left and right side edges of the rear portion of the main body 20 obliquely toward the front surface side; a front attachment portion 22 that extends forward from a front edge of the main body 20 and engages with the front cross member 15; and a rear mounting portion 23 that extends diagonally upward and rearward from the rear edge of the main body 20 and engages with the rear cross member 16. The main body 20 may be slightly inclined so that its front side is located upward toward the front with respect to its rear side, with respect to a middle position in the front-rear direction of the rear portion. The support member 8 is formed of resin molded by using a metal wire 24 as an insert, and receives a load of the occupant to be bent, thereby elastically supporting the occupant.

A Seat Belt Reminder (SBR) system that gives an alarm when a seat belt is not worn although an occupant is seated is employed in the seat 101 (see fig. 1), and a pressure sensor 25 is provided for this purpose. A sensor mounting portion 26 on which the pressure sensor 25 is mounted is formed on the front surface side of the center portion in the left-right direction of the front portion 50 of the main body 20. The pressure sensor 25 detects the pressure applied to the seat cushion 2 to determine whether or not the occupant is seated on the seat 1. At the rear portion of the main body 20, the load of the occupant is dispersed by the inclined portion 21, and therefore the pressure applied when seated is reduced. Therefore, the pressure sensor 25 is disposed at a position shifted forward with respect to the inclined portion 21 so as not to be affected by the pressure dispersion of the inclined portion 21. Therefore, the accuracy of the seating determination by the seating determination means (not shown) such as the ECU receiving the signal from the pressure sensor 25 is improved. The pressure sensors 25 are arranged offset from the hanging position 10a (see fig. 1) of the skin material 10 in a plan view.

In the seat 1 (see fig. 1), an air ventilation system for adjusting humidity by sucking or blowing air to the surface of the seat 1 is employed, and a pair of air openings 27, 27 penetrating vertically are provided on the left and right sides of the sensor mounting portion 26 on the main body 20 so as to form an air passage. Each air opening 27 is rectangular in plan view. A central longitudinal wire 24a for reinforcement passing in the longitudinal direction is embedded in a resin portion forming the sensor mounting portion 26 sandwiched by the pair of air openings 27, 27.

Further, a central locking hole 29 positioned at the center in the left-right direction and a pair of side locking holes 30, 30 positioned at the left and right of the central locking hole 29, which are through holes for locking a plurality of hooks 28 (see fig. 5A to 5C) attached to the end portion of the skin material 10 and adjusting the deflection of the support member 8, are provided in the rear portion of the body 20. The central locking hole 29 and the pair of side locking holes 30 and 30 are rectangular in plan view. The center locking hole 29 and the pair of side locking holes 30 and 30 arranged in the left-right direction have the same width in the front-rear direction, but the center locking hole 29 is longer than the pair of side locking holes 30 and 30 in the length in the left-right direction. Therefore, the flexibility of the central portion of the support member 8 is increased, and soft seating comfort is achieved. By making the length of the center locking hole 29 and the length of the pair of side locking holes 30, 30 different from each other in this way, the support member 8 is set to flex so as to improve the feeling of sitting. Further, the central longitudinal wire 24a penetrates through the center in the left-right direction in the central locking hole 29, whereby the strength of the periphery of the central locking hole 29 is reinforced. As shown in fig. 5A, the hook 28 locked in the central locking hole 29 has a groove 31 for receiving the central longitudinal wire 24a, and therefore, the engagement of the hook 28 with the central locking hole 29 becomes firm. Further, since the groove 31 is provided, the hook 28 engaged with the center engaging hole 29 is different in shape and wider in width than the hook 28 engaged with the side engaging hole 30. By changing the shape or size of the hook 28 in accordance with the shape or size of the locking hole to be locked in this way, it is possible to prevent an operator from assembling the hook 28 into an incorrect locking hole. Since the center locking hole 29 and the pair of side locking holes 30 and 30 are separated from the rear mounting portion 23, workability is excellent. Since the cover material 10 can be locked to the support member 8, it is not necessary to set a protruding piece or the like for forming the locking portion to the frame 7, and the frame 7 can be made smaller and lighter.

As shown in fig. 2 and 5A to 5C, a hook recess 32 that is recessed toward the back side is provided in the rear edge portions of the center locking hole 29 and the pair of side locking holes 30 and 30 on the front side of the body 20. The hooks 28 pass through the corresponding central locking holes 29 or side locking holes 30 from the back surface side to the front surface side, and the tips of the hooks 28 are accommodated in the hook recesses 32. The distal end of the hook 28 is accommodated in the hook recess 32, whereby the hook 28 can be positioned with respect to the center locking hole 29 and the side locking holes 30. As shown in fig. 5C, instead of the hook recess 32, a hook rim wall 33 protruding toward the front side may be provided on the rear edge portion on the front side of the center locking hole 29 to lock the tip end of the hook 28 (the same applies to the front edge portion of the side locking hole 30). The tip of the hook 28 is engaged with the hook rim wall 33, thereby preventing the hook 28 from falling off from the center locking hole 29 and the side locking holes 30. Further, since the central locking hole 29 and the side locking holes 30 are provided at positions where the pair of left and right inclined portions 21, 21 of the body 20 are aligned, that is, at positions where the rigidity is relatively high, deformation of the central locking hole 29 and the side locking holes 30 can be suppressed, and the hooks 28 can be prevented from falling off from the central locking hole 29 and the side locking holes 30.

As shown in fig. 2, 3, and 6 to 8, the inclined portion 21 is formed with a cylindrical portion 34 that protrudes downward (in a rear direction in a direction perpendicular to the main body 20). A clip 37 is inserted through the hollow mounting hole 35 of the tube of the tubular portion 34, and the clip 37 is used to mount other members to the support member 8. A shoulder surface 38 is formed on the inner peripheral surface of the cylindrical portion 34, and the shoulder surface 38 is used to increase the rigidity of the cylindrical portion 34 and to engage the tip of the clip 37. For example, the cylindrical portion 34 includes: a bottom wall 34a having a through hole through which the clip 37 is inserted, and having a rectangular shape in a plan view; and a side wall 34b rising upward from a side portion of the bottom wall 34 a. The upper surface of the bottom wall 34a constitutes a shoulder surface 38. Since the lower end of the cylindrical portion 34 is positioned on substantially the same plane as the back surface of the main body 20 and the extending direction of the mounting hole 35 is perpendicular to the main body 20, the mounting operation of the clip 37 to the inclined portion 21 from the back surface side can be performed in the same manner as the mounting operation to the main body 20. That is, the workability of attaching the clip 37 to the cylindrical portion 34 is improved as compared with the case where the clip 37 is attached obliquely. Further, by having the shoulder surface 38, the tip of the hook 37 does not protrude from the surface of the inclined portion 21, and the hook 37 can be prevented from affecting the sitting feeling. The positions of the center locking hole 29 and the pair of side locking holes 30 and 30 in the front-rear direction are shifted from the hanging position 10a of the skin material 10 provided on the packing 9. When the skin material 10 is further fixed to the side member 14, the fixed position thereof is shifted forward and backward with respect to the inclined portion 21.

A lattice-shaped reinforcing portion 39 is provided on the back surface of the inclined portion 21. The lattice-shaped reinforcing portion 39 includes a plurality of vertical ribs 40 projecting downward and extending in the front-rear direction, and a plurality of horizontal ribs 41 projecting downward and extending in the lateral direction along the inclined portion 21. Since the rigidity of the inclined portion 21 is increased by the grid-shaped reinforcing portion 39, the position of the support member 8 with respect to the frame 7 can be fixed while suppressing deformation of the inclined portion 21. The cylindrical portion 34 is disposed in the lattice-shaped reinforcing portion 39, and in order to compensate for a decrease in rigidity due to the provision of the mounting hole 35, it is preferable that a part of the vertical ribs 40 and/or the horizontal ribs 41 be connected to the cylindrical portion 34. The lower edge of the portion of the lateral rib 41 connected to the cylindrical portion 34 disposed inward to the left and right of the cylindrical portion 34 is located at the same height as the lower end of the cylindrical portion 34 or below the lower end of the cylindrical portion 34. This portion of the lateral rib 41 improves the rigidity of the entire vertical length portion of the cylindrical portion 34. Further, the portion of the cross rib 41 may be the under-wrapped rib wire 24 f. The rib wire 24f is preferably located at the same height as the lower end of the cylindrical portion 34 or below the lower end of the cylindrical portion 34. Since the cylindrical portion 34 reinforced by the vertical ribs 40 and the horizontal ribs 41 is disposed in the lateral direction of the central locking hole 29 and the side locking holes 30, the rigidity of the periphery of the central locking hole 29 and the side locking holes 30 is also improved.

In addition, as in the modification shown in fig. 11, the hole-portion annular wire 24g may be arranged so as to surround the cylindrical portion 34 in order to increase the rigidity of the inclined portion 21. In this case, the wires 24 are preferably arranged so as to intersect the longitudinal ribs 40 and the lateral ribs 41.

As shown in fig. 4, side cutouts 49 are formed in the left and right side edges of the support member 8 between the main body 20 and the inclined portion 21 provided in the rear portion. The position sensor 19 attached to the side member 14 is located at a position in the front-rear direction of the side cutout 49. By providing the side cut 49, the support member 8 can be made smaller and lighter, and the mounting state of the position sensor 19 can be easily confirmed. The side cutouts 49 may be provided only on the side where the position sensors 19 are provided, out of the left and right side edges of the support member 8. In addition, the frame 7 and the support member 8 are substantially mirror-symmetrical with respect to a plane at the center perpendicular to the left-right direction thereof, except that the position sensor 19 is provided only on one of the left and right sides.

Since the inclined portion 21 is not provided in front of the side cut-out 49, the side edge of the main body 20 becomes the side edge of the support member 8 at the front portion 50 of the support member 8. The front portion 50 has a length in the front-rear direction shorter than the length in the front-rear direction of the inclined portion 21, and the outer edge of the front portion 50 in the left-right direction is located inward of the outer edge of the inclined portion 21 in the left-right direction. Therefore, the load applied to the front portion 50 is reduced, and the load applied to the rear portion is dispersed laterally, so that the strength of the support member 8 as a whole is improved. Further, both right and left sides of the front portion 50 of the main body 20 have crank shapes 50a lower in front than in rear in side view, and the rigidity lowered by the side notches 49 is compensated. Since the crank shape 50a is lower in the front than in the rear, the burden on the legs of the occupant is small. Further, when another member is attached to the back side of the portion where the crank shape 50a is lowered, the influence of the end of the clip (not shown) protruding from the front side is alleviated by the portion where the crank shape 50a is raised, and the lowering of the sitting feeling is suppressed. Further, since the buttocks of the occupant are supported on the rear side even if the front side becomes lower, the influence of the crank shape 50a on the support of the buttocks is small, and the decline of the sitting feeling is suppressed. Further, the vicinity of the left and right outer sides of each of the pair of left and right air openings 27, 27 in the main body 20 has a bent portion 51, and the bent portion 51 is bent in front view so as to be connected to a portion of the left and right side portions of the front portion 50 of the main body 20 which is lowered by the crank shape 50 a. The bent portion 51 extends from the vicinity of the air opening 27 to the vicinity of the front edge of the main body 20. The bending portion 51 compensates for the rigidity lowered by the pair of left and right air openings 27, 27. The crank shape 50a, the curved portion 51, and the front wall portion 50b extending outward in the left-right direction from the front end of the curved portion 51 define a recess 50c on the front side of both left and right sides of the front portion 50. Since the recess 50c improves the rigidity around it, the front attachment portions 22 disposed on both the left and right sides improve the stability of attachment to the front cross member 15. Ribs 50d extending in the front-rear direction and the left-right direction may be provided on the surface of the recess 50 c.

As shown in fig. 3 and 4, in order to increase the rigidity of the left and right side edges of the support member 8, a flange 53 protruding toward the front side is provided on the side edge of the front portion of the main body 20, and a flange 54 protruding toward the back side is provided on the side edge of the inclined portion 21. The flange 53 is continuous at least in the front-rear direction range in which the bent portion 51 extends. In order to improve rigidity, the rear end side of the flange 53 may also extend to a portion of the inclined portion 21 where the side cutout 49 is formed. When a clip (not shown) is attached to the hole 55 provided near the front side edge of the main body 20, the tip of the clip protrudes toward the front surface side of the main body 20. The flange 53 projecting toward the front surface side alleviates the influence of the projection of the tip of the clip on the seating feeling. On the other hand, since the shoulder surface 38 is provided in the mounting hole 35 of the inclined portion 21, the tip of the clip 37 mounted in the mounting hole 35 does not protrude toward the surface side of the inclined portion 21. Therefore, the flange 54 of the inclined portion 21 projects toward the back surface side without affecting the seating feeling.

As shown in fig. 2, the wire 24 embedded in the resin constituting the support member 8 may extend in the left-right direction (lateral direction), and the rigidity of the periphery of the support member 8 is improved. The front cross-wire 24c is disposed in front of the pair of left and right air openings 27, 27 at a position substantially along the front edge of the body 20, the central cross-wire 24d is disposed between the pair of left and right air openings 27, 27 and the central locking hole 29 and the pair of left and right side locking holes 30, and the rear cross-wire 24e is disposed in rear of the central locking hole 29 and the pair of left and right side locking holes 30, 30 at a position substantially along the rear edge of the body 20. A part of the central horizontal wire 24d is disposed along the front edges of the central locking hole 29 and the pair of left and right side locking holes 30, 30.

The front attachment portion 22 is engaged with the front cross member 15 from above, and includes three front attachment pieces 56 separated from each other for easy attachment. Similarly, the rear mounting portion 23 is engaged with the rear cross member 16 from above, and includes three rear mounting pieces 57 separated from each other for easy mounting. Both ends of the central longitudinal wire 24a and the side longitudinal wire 24b are embedded in the corresponding front attachment pieces 56 and rear attachment pieces 57, respectively, to reinforce the front attachment portion 22 and the rear attachment portion 23.

A front cutout 58 is provided in a portion of the front edge of the main body 20 that is not coupled to the front attachment piece 56. The width of the front cutout 58 in the left-right direction is smaller than the distance between the two adjacent front attachment pieces 56, 56 connected to the front edge of the main body 20. Therefore, the outline of the space defined by the front edge of the main body 20 and the two adjacent front attachment pieces 56, 56 is convex in plan view. By providing the front cutout 58, a region from the vicinity of the front edge of the main body 20 to the front mounting piece 56 can be greatly bent, and the front mounting piece 56 can be easily attached to the front cross member 15. Further, the width of the front cutout 58 is smaller than the distance between two front mounting pieces 56 adjacent to each other, thereby suppressing a drop in seating feeling caused by providing the front cutout 58.

As shown in fig. 2 and 12, a connecting portion 59 is formed between the sensor mounting portion 26 and the central front attachment piece 56 so as to embed the central vertical wires 24a and the front horizontal wires 24 c. The central vertical wires 24a and the front horizontal wires 24c cross each other at the connecting portions 59. By providing the air opening 27 or the front cutout 58, the rigidity of the front portion 50 of the main body 20 in the vicinity of the center in the left-right direction is reduced, but the necessary rigidity is secured by the connection portion 59. The front attachment piece 56 is in the shape of a hook extending substantially forward from the main body 20, and the rear attachment piece 57 is in the shape of a hook extending diagonally upward and rearward from the rear edge of the main body 20. The center positions of the pressure sensor 25 and the connecting portion 59 are preferably the center in the left-right direction of the front portion 50 of the main body 20 in order to stabilize the pressure sensor 25, but may be inside a triangle 60 connecting the center in the left-right direction of the rear edge of the front portion mounting portion 22 and the inside in the left-right direction of the front edge of the left-right inclined portion 21 in a plan view.

The central vertical wire 24a extends from the central front attachment portion 22 to the central rear attachment portion 23 through the connection portion 59 and the sensor mounting portion 26. The front cross wire 24c has: a first portion 24ca along the front edge of the main body 20 at the center in the left-right direction; and a second portion 24cb that is arranged along the front edge of the air opening 27, avoiding the front cutout 58 on the lateral side in the left-right direction. Since the first portion 24ca is located forward of the second portion 24cb, the front cross-wire 24c is bent. Further, the left and right end portions of the front cross-bar 24c extend forward, extend outward in the left-right direction than the bent portions 51, and extend along the flanges 53, so that the front corner portion of the main body 20 is not reinforced by increasing the size of the support member 8.

Preferably, the spacer 9 (see fig. 5) is also disposed on the front attachment piece 56 of the support member 8. In this case, since the load of the occupant is applied to the front attachment piece 56 via the pad 9, the engagement strength of the front attachment piece 56 that engages with the front cross member 15 from above is improved.

As shown in fig. 5B and 5C, a hook accommodating portion 66 recessed upward is formed in a portion of the packing 9 facing the hook 28. The hook accommodating portion 66 can avoid interference between the spacer 9 and the hook 28, and facilitates the work of attaching the hook 28 to the center locking hole 29 and the side locking holes 30. In addition, in order to suppress the falling off of the hook 28, a portion of the spacer 9 facing the hook 28 may be pressed against the hook 28 instead of the hook accommodating portion 66.

Fig. 9 is a rear view of the cushion 71 in the seat back 3 (see fig. 1), and fig. 10 is a perspective view of the side frame 72 of the seat back 3 as viewed from the front inside. In order to improve workability, it is preferable that the skin fixing material 73 provided on the upper end side of the skin material 10 is fixed to a position above the airbag 74 attached to the side frame 72, and the attachment position 75 of the other member is separated vertically, horizontally, or forward and backward from the reinforcing-lining-clip attachment position 76 of the airbag 74, in the skin fixing material 73 for fixing the skin material 10 (see fig. 1). In the case where the other member is disposed on the side frame 72, the spacer 71 is preferably disposed between the other member and the skin-fixing material 73 so that the skin-fixing material 73 does not fall off. The other members are preferably attached to the side frames 72 in the vicinity of a portion where the rigidity is improved by providing shallow recesses and projections in the plate-like main body portion. When the side frames 72 are provided with brackets (not shown) for supporting other components, it is preferable to avoid the cross members (not shown) from being inclined in order to contribute to downsizing and suppress detachment of other components. In order to improve rigidity, the skin fixing material 73 is preferably provided at a position where the side frame 72 and the lower frame (not shown) overlap each other or are welded. When fixing another member to the side frame 72, in order to increase the rigidity, the mounting position 75 of the other member is preferably located near the bead 77 facing the airbag 74 and at a position avoiding the module holder 78, and is preferably shifted from the mounting position 75 of the other member when viewed from the front. In order to increase the rigidity, it is preferable that the mounting position of the airbag 74 is provided on the extension line of the bead 77. In order to further improve workability, the mounting position of the module holder 78 is preferably set so as to avoid the flanges 79 of the side frames 72 in a side view.

The gasket 71 has: a main portion 71a disposed on the surface side; and an end portion 71b that is disposed on the back side so as to overlap an upper portion and left and right side portions of the main portion 71a, and surrounds an upper frame (not shown) and the side frame 72 in cooperation with the main portion 71 a. The main portion 71a is provided with a hanging hole 80 for hanging the skin material 10 (see fig. 1). At the end portion 71b, a cut 81 is formed from the inside to the outside at the connection portion between the upper portion and the left and right side portions. The through-hole 82 provided on the side of the main portion 71a is provided in the same plane as the module holder 78 attached to the side frame 72. The through-hole 82 is provided at a position avoiding the wire 84 of the holding support member 83.

< second embodiment >

A seat 101 according to a second embodiment will be described with reference to fig. 1, 13, and 14.

As shown in fig. 1, the seat 101 is used as an operator's seat and/or a passenger's seat of the vehicle V, and includes a seat cushion 102, a seat back 103, and a headrest 104. The seat cushion 102 is supported by a pair of left and right slide rails 106 fixed to a vehicle cabin floor 105 so as to be slidable in the front-rear direction. The seat 101 includes a flexible pad 109 made of urethane foam or the like disposed on the frame 107 and the support member 108 (see fig. 13), and a cover material 110 covering the pad 109. The slide rail 106 has: a lower rail 111 coupled with the floor 105; and an upper rail 112 supported by the lower rail 111 so as to be slidable forward and backward.

As shown in fig. 13, the seat cushion 102 includes: a frame 107 in a frame shape; and a support member 108 supported by the frame 107 so as to be positioned inside the frame 107, and elastically supporting a load of an occupant of the seat 101 via a skin material 110 and a cushion 109 (see fig. 1). The frame 107 and the support member 108 are substantially mirror-symmetrical (symmetrical in a plan view) with respect to a plane at the center perpendicular to the horizontal direction.

The frame 7 has: a pair of left and right side members 114, 114; a front cross member 115 connecting front end portions of the pair of left and right side members 114, 114 to each other; a rear cross member 116 connecting rear end portions of the pair of left and right side members 114, 114 to each other; and a cradle 117 connected to front end portions of the pair of left and right side members 114, and having left and right intermediate portions located forward of the front cross member 115. The pair of left and right side members 114, 114 are long members made of metal plates and extending in the front-rear direction, and have flanges formed in the upper and lower directions. The front cross member 115 and the rear cross member 116 are formed of metal pipes extending in the left-right direction. The cradle 117 is formed of a metal plate and has a front surface substantially along the seat surface.

As shown in fig. 13 and 14, the support member 108 includes: a plate-like main body 120 extending substantially parallel to the frame 107; an inclined portion 121 extending obliquely outward from the left and right side edges of the rear portion 120a of the main body 120 toward the front side; a front attachment portion 122 that extends forward from the front edge of the main body 120 and engages with the front cross member 115; and a rear mounting portion 123 extending diagonally upward and rearward from the rear edge of the main body 120 and engaging with the rear cross member 116. The main body 120 and the inclined portion 121 are located in the frame 107 in a plan view. The main body 120 may be slightly inclined so that the front side thereof is located upward with respect to the rear side thereof as the front side is located forward, with respect to the middle position of the rear portion 120a in the front-rear direction. The support member 8 is formed of resin insert-molded from a metal wire 24, and receives the load of the occupant to be deflected, thereby elastically supporting the occupant. The front attachment portion 22 is engaged with the front cross member 115 from above, and includes a first front attachment piece 122a located at the center in the left-right direction and a pair of second front attachment pieces 122b and 122b located near the left and right ends. The rear mounting portion 123 is engaged with the rear cross member 116 from above, and includes a first rear mounting piece 123a located at the center in the left-right direction and a pair of second rear mounting pieces 123b, 123b located near the left and right ends. In this way, the front mounting portion 122 and the rear mounting portion 123 are separated into three parts, and thus are easily attached to the front cross member 115 and the rear cross member 116. The main body 120 is located below the upper end of the front mounting portion 122 and the upper end of the rear mounting portion 123. The wire 124 includes: a central longitudinal wire 124a located at the center of the left and right sides and extending forward and backward; a pair of left and right side longitudinal wires 124b, 124b partially passing through the inclined portion 121 and extending forward and backward; and a plurality of cross-wires 124c extending substantially in the left-right direction.

A Seat Belt Reminder (SBR) system that gives an alarm when a seat belt is not worn although an occupant is seated is employed in the seat 101 (see fig. 1), and a pressure sensor 125 is provided for this purpose. A sensor mounting portion 126 on which the pressure sensor 125 is mounted is formed on the front surface side of the center portion in the left-right direction of the front portion 120b of the main body 120. The central vertical wire 124a penetrates the sensor mounting portion 126 longitudinally. The pressure sensor 125 detects pressure applied to the seat cushion 102 to determine whether the occupant is seated on the seat 101. At the rear portion 120a of the main body 120, the load of the occupant is dispersed by the inclined portion 121, and therefore the pressure applied when seated is reduced. Therefore, the pressure sensor 125 is disposed at a position shifted forward with respect to the inclined portion 121 so as not to be affected by the pressure dispersion of the inclined portion 121. Therefore, the accuracy of the seating determination by the seating determination means (not shown) such as the ECU that receives the signal from the pressure sensor 125 via the connector 127 and the wire harness 127a is improved. Further, since the pressure sensor 125 is supported by the central vertical wire 124a having higher rigidity than the resin, the pressure sensor 125 can be easily pressed by the load of the occupant.

In the seat 101 (see fig. 1), an air ventilation system for adjusting humidity by sucking or blowing air to the surface of the seat 101 is employed, and a pair of air openings 128, 128 penetrating vertically are provided on the left and right sides of the sensor mounting portion 126 of the main body 120 so as to form an air passage. Each of the air openings 128 is substantially rectangular in plan view, and the left and right side edges of the air openings 128, 128 on the left and right inner sides define the left and right side edges of the sensor mounting portion 126. A central longitudinal wire 124a for reinforcement passing in the longitudinal direction is embedded in a resin portion forming the sensor mounting portion 126 sandwiched between the pair of air openings 128, 128.

Further, the rear portion 120a of the body 120 is provided with a central locking hole 129 positioned at the center in the left-right direction and a pair of side locking holes 130, 130 positioned at the left and right of the central locking hole 129, which are through holes for adjusting the deflection of the support member 108 by locking a plurality of hooks (not shown) attached to the end portion of the skin material 110. The central locking hole 129 and the pair of side locking holes 130 and 130 are rectangular in plan view.

A cylindrical portion 131 protruding downward (in a direction of a back surface perpendicular to the main body 120) is formed in the inclined portion 121, and a clip 132 can be attached to the cylindrical portion 131 from below. The clip 132 holds other members in the lower portion, and is fitted in a through hole provided in the bottom wall of the cylindrical portion 131 in the upper portion, and is engaged with the upper surface of the bottom wall of the cylindrical portion 131, whereby the clip 132 is fixed to the support member 108. The upper end of the clip 132 engaging with the cylindrical portion 131 is positioned in the cylindrical portion 131 and does not protrude upward from the surface of the inclined portion 121, and therefore, the sitting feeling is not affected even if the clip 132 is attached to the cylindrical portion 131. The cylindrical portion 131 is located between the end edge on the left-right direction inner side of each inclined portion 121 (the boundary between the inclined portion 121 and the rear portion 120 a) and the end edge on the left-right direction outer side, and is preferably located further outward than 1/3 of the left-right width of the inclined portion 121 from the end edge on the left-right direction inner side, and more preferably located further outward than 1/2 of the left-right width of the inclined portion 121 from the end edge on the left-right direction inner side. In the inclined portion 121, a larger moment is applied to the end edge closer to the inner side in the left-right direction due to the load of the occupant applied to the inclined portion 121, and by disposing the cylindrical portion 131 disposed in the inclined portion 121 at a position relatively closer to the left and right outer sides, the clip 132 can be attached to a portion that is less likely to receive the moment.

Side cutouts 133 are formed in the left and right side edges of the support member 108 in front of the inclined portion 121 and at the rear end of the front portion 120b of the main body 120. By providing the side notches 133, the support member 108 can be made smaller and lighter.

By providing the side notches 133 and positioning the middle portions of the left and right end edges of the front portion 120b outside the left and right end edges of the front attachment portion 122, wing portions 134 are formed on the left and right side portions of the front portion 120 b. The wing portions 134 are not inclined with respect to the middle portion in the left-right direction of the front portion 120 b. A portion of the wing 134 is aligned in the left-right direction with respect to the pressure sensor 125. Since the load applied to the front portion 120b is dispersed by the wing portions 134, the application of an excessive load to the pressure sensor 125 is suppressed. The front portion 120b has a length in the front-rear direction shorter than that of the rear portion 120a, and the outer edge of the wing portion 134 in the left-right direction is located inward of the outer edge of the inclined portion 121 in the left-right direction. Therefore, the load applied to the front portion 120b is reduced, and the load applied to the rear portion 120a is dispersed laterally, so that the strength of the support member 108 as a whole is improved. In order to suppress a decrease in rigidity between the wing portions 134 and the sensor mounting portion 126, the length of the air opening 128 in the front-rear direction is preferably 1.2 times or less the length of the pressure sensor 125 in the front-rear direction.

A plurality of clip mounting holes 135 for mounting the clips 132 are provided at the front portion 120 b. The clip attachment holes 135 are provided at positions shifted in the left-right and front-rear directions with respect to the sensor mounting portion 126. The clip attachment hole 135 is provided at a position not overlapping with the wire 124 in a plan view. In order to effectively utilize the space between the wires 124, at least a part of the clip mounting hole 135 is located between the central longitudinal wire 124a and the side longitudinal wires 124b, and at least a part of the clip mounting hole 135 is located between the plurality of transverse wires 124 c. In order to suppress the influence of the load of the occupant on the clip 132, it is preferable that at least half of the clip attachment holes 135 disposed between the center vertical wire 124a and the side vertical wires 124b are located on the left and right outer sides of the center between the center vertical wire 124a and each side vertical wire 124 b. The pressure applied to the pressure sensor 125 may be affected by the tip of the clip 132 protruding from the clip attachment hole 135 toward the surface side of the support member 108, but this effect is suppressed because the clip attachment hole 135 is provided at a position displaced in the front-rear and left-right directions with respect to the sensor mounting portion 126. In order to facilitate the bending of the vicinity of the sensor mounting portion 126 in the support member 108, a part of the clip attachment hole 135 may be disposed at a position not shifted in the front-rear direction (aligned in the left-right direction) instead of the positional relationship shifted in the front-rear direction with respect to the sensor mounting portion 126. In order to effectively utilize the space between the sensor mounting portion 126 and the rear portion 120a, a part of the clip mounting hole 135 is provided at a position rearward of the rear edge of the pressure sensor 125. When the main body 120 of the support member 108 is divided into the central region a and the two left and right side regions B, B by trisecting the width in the left-right direction of the portion having the largest width in the left-right direction, the number of clip attachment holes 135 included in each side region B is larger than the number of clip attachment holes 135 included in the central region a. By disposing the clip attachment hole 135 in this manner, a decrease in rigidity near the center region a of the pressure sensor 125 can be suppressed. At least a part of the clip attachment hole 135 is located inside a triangle C connecting the center of the rear edge of the first front attachment piece 122a in the left-right direction and the inside of the front edge of the left-right inclined portion 121 in the left-right direction in a plan view. Since the first front mounting piece 122a and the inclined portion 121 are located above the main body 120, the load of the occupant is less likely to be applied to the clip by disposing the clip mounting hole 135 in the region surrounded thereby. For the same reason, at least a part of the clip attachment hole 135 is disposed forward of the inclined portion 121 and rearward of the pressure sensor 125. Further, a part of the clip mounting hole 135 is provided at a position aligned right and left with respect to the side cutout 133. Thus, when the pressure sensor 125 receives a load, the region on the front portion 120b side of the inclined portion 121 can be easily deflected. In order to effectively utilize the space in the left-right direction, it is preferable that a part of the clip mounting holes 135 be arranged in tandem with each other. In order to increase the mountable position of the clip 132, a clip mounting hole 135 may be provided in the wing portion 134. In addition, in order not to affect a height stopper (not shown) that regulates the vertical movement of the seat cushion 102, it is preferable to dispose the hook 132 and the member held by the hook 132 so as to avoid the height stopper in a plan view. Further, a part of the clip mounting hole 135 is preferably provided in the vicinity of the wing portion 134 and the second front mounting piece 122b, weakening the rigidity of the periphery thereof. The clip attachment hole 135 is preferably disposed in the front portion 120b forward of the inclined portion 21, and is not disposed in the rear portion 120a of the main body 120. Since the load of the occupant is easily applied to the inclined portion 121 and the rear portion 120a adjacent to the inclined portion 121 on the left and right sides, by providing the clip attachment hole 135 in the front portion 120b that is relatively hard to receive the load, it is possible to suppress a decrease in the strength of the rear portion 20 a.

At least a part of the clip 132 is attached to the clip attachment hole 135 from the back surface side of the support member 108 while gripping the harness 127a electrically connected to the pressure sensor 125 via the connector 127. The harness 127a is preferably routed below the support member 108 so as to overlap the air opening 128 in a plan view, so that the attached state can be confirmed. Further, the clip 132 that grips the wire harness 127a is preferably attached to a clip attachment hole 135 provided in the vicinity of the air opening 128. The clip attachment holes 135 are preferably arranged symmetrically about a center line extending longitudinally at the center of the left and right sides in a plan view. By arranging the clip attachment holes 135 symmetrically in the left-right direction, even when it is desired to arrange members such as the harnesses 127a, which are gripped by the clips 132, on the driver's seat and the passenger seat in the left-right direction, the common support member 108 can be used for the driver's seat and the passenger seat.

The front portion 120b of the main body 120, which is located on the left and right outer sides of the air opening 128, has a crank shape 136 that is lower in front than in rear in a side view, and compensates for the rigidity that decreases through the side notches 133. Since the crank shape 136 is lower in the front than in the rear, the burden applied to the legs of the occupant is small. Further, the vicinity of the left and right outer sides of the pair of left and right air openings 128, 128 in the main body 120 has a bent portion 137, and the bent portion 137 is bent in front view so as to be connected to a portion of the front portion 120b of the main body 120 that is lowered by the crank shape 136. The bent portion 137 extends from the vicinity of the air opening 128 to the vicinity of the leading edge of the main body 120. The bending portion 137 compensates for the rigidity decreased by the pair of left and right air openings 128, 128. A flange 138 protruding toward the front surface side is provided at the outer edge portion of the wing portion 134 in the left-right direction. Further, the front portion 120b is provided with a front wall portion 139, and the front wall portion 139 extends outward in the left-right direction from the front end of the bent portion 137 and reaches the front end of the flange 138. The crank shape 136, the curved portion 137, the flange 138, and the front wall 139 define a recess 140 on the front surface of the left and right sides of the front portion 120 b. Further, in the case where the clip attachment hole 135 is provided in the portion that becomes lower by the concave portion 140, and another component is attached to the back surface side by the clip 132, the influence of the tip end of the clip 132 protruding to the front surface side is alleviated by the concave portion 140, and the lowering of the sitting feeling and the influence on the pressure sensor 125 are suppressed. Further, since the hip of the occupant is supported on the rear side even if the front side is lowered, the concave portion 140 has a small influence on the support of the hip, and the rigidity of the periphery is improved by dividing the crank shape 136, the bent portion 137, the flange 138, and the front wall portion 139 of the concave portion 140 that suppresses the decline of the feeling of sitting, so that the attachment stability of the second front attachment pieces 122b disposed on both the left and right sides to the front cross member 115 is improved.

A connection portion 141 in which the wire 124 is embedded is formed between the sensor mounting portion 126 and the first front mounting piece 122 a. The outer contour of the first front mounting piece 122a is substantially rectangular in plan view, and the width in the left-right direction thereof is wider than the width in the left-right direction of the sensor mounting portion 126. Therefore, the support member 108 is restrained from swinging about the front-rear direction as an axis. Preferably, the left edge of the sensor mounting portion 126 is located rightward of the left edge of the first front attachment piece 122a, and the right edge of the sensor mounting portion 126 is located leftward of the right edge of the first front attachment piece 122 a.

The first front mounting piece 122a has a first mounting piece opening 142 at a bent portion that engages with the front cross member 115. The first mounting piece openings 142 can suppress a decrease in the mounting strength of the first front mounting pieces 122a to the front cross member 115, and can facilitate local flexure of the support member 108. The first mounting piece opening 142 has two inner openings 142a and two outer openings 142b provided on the outer sides in the left-right direction with respect to the inner openings 142 a. The left-right direction lengths of the inner opening 142a and the outer opening 142b are substantially equal to each other, and the front-rear direction length of the inner opening 142a is longer than the front-rear direction length of the outer opening 142 b. By the difference in size between the inner opening 142a and the outer opening 142b, the support member 108 is easily deflected inward in the lateral direction, and extreme load application to the pressure sensor 125 can be suppressed. In addition, the sensor mounting portion 126 is easily bent because the range in which the inner opening 142a overlaps the sensor mounting portion is larger than the range in which the outer opening 142b overlaps the sensor mounting portion in the range extending in the left-right direction.

The second front attachment piece 122b has a second attachment piece opening 143 and a notch 144 provided on the lateral edge on the outer side in the left-right direction at a bent portion that engages with the front cross member 115. The second mounting piece opening 143 and the cutout 144 have substantially the same length in the left-right direction and substantially the same length in the front-rear direction. The second mounting piece opening 143 and the notch 144 can suppress a reduction in the mounting strength of the second front mounting piece 122b to the front cross member 115, and can facilitate the lateral outer side of the support member 108 to be bent.

The sensor mounting portion 126 includes: a mounting portion opening 145 whose upper portion is covered with the pressure sensor 125; an engaging claw 146 that engages with the pressure sensor 125; and a pair of left and right locking ribs 147, 147 that lock the left and right side edges of the pressure sensor 125. Since the sensor mounting portion 126 is aligned in the front-rear direction with respect to the first front mounting piece 122a, the pressure sensor 125 is mounted on a relatively stable portion of the support member 108, and is further engaged by the engaging claws 146 and is locked to the engaging ribs 147 on the left-right inner side with respect to the left-right side edges of the first front mounting piece 122a, so that the pressure sensor 125 is more stable. The engaging claws 146 are positioned further inward in the left-right direction than the left and right side edges of the first front mounting piece 122a, and are aligned with at least a part of the first mounting piece openings 142 in the front-rear direction. Therefore, when a load is applied to the pressure sensor 125, the load-receiving portion of the support member 108 can be easily bent with respect to the front cross member 115. In order to facilitate the deflection of the sensor mounting portion 126 and its vicinity, the mounting portion opening 145 is preferably aligned with a portion of the clip mounting hole 135 in the left-right direction.

As shown in fig. 14, a clip mounting hole 135 may be provided in the cradle 117.

Since the pressure sensor 125 is disposed on the central vertical wire 124a having higher rigidity than the resin, the deflection of the sensor mounting portion 126 is relatively small when the load of the occupant is applied, a relatively large pressure is applied to the pressure sensor 125, and the pressure sensor 125 can easily detect the pressure. When the vicinity of the wire 124 supports the load of the occupant with a relatively large force, the clip 132 that grips the wire harness 127a electrically connected to the pressure sensor 125 is attached to the clip attachment hole 135 (provided at a position that does not overlap the wire 124 in a plan view), and therefore, the clip 132 is prevented from coming off by the load of the occupant.

The above description has been made of the specific embodiments, but the present invention is not limited to the embodiments and can be implemented with a wide variety of modifications. The end of the skin material may be a locking portion having another structure such as a hook instead of the hook. It is also possible to omit a part of the ribs to increase the deflection of the member. The structures of the above-described embodiments and modified embodiments may be applied to a seat back, and may also be applied to a seat of a vehicle other than a vehicle, for example, an airplane or the like. Instead of the clip attaching hole and/or the cylindrical portion, a protrusion capable of attaching a clip may be provided on the back surface of the support member.