JP2014008321A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat in which the center of a seated surface is formed of a conductive facing material, and a connecting member is connected to conductive fibers contained in the conductive facing material at a margin of the end of the conductive facing material, suspended in a groove of a seat pad, the vehicle seat reducing breaking of the conductive fibers when a load of a seating person is repeatedly applied.SOLUTION: A vehicle seat is provided in which a connection between conductive fivers of a margin 45n of a central cover piece 45 and a connecting member 51 is located in the outside of a seat from a suspended cloth 49 (on a side pad portion 25 side).

Description

  The present invention relates to a vehicle seat. More specifically, the present invention relates to a vehicle seat in which a central portion of a seating surface is mounted with a conductive skin material.

  Conventionally, a sensor has been configured in which a conductive skin material including conductive fibers is arranged on a portion that covers the central portion of the seating surface, and a sensor that determines whether or not a seat is seated on the seat from the capacitance of the conductive fibers. is there. In this type of sheet, generally, a connection member is connected to the conductive fiber at the end of the conductive skin material, and the conductive fiber is connected to the capacitance detector via the connection member. . For example, in Patent Document 1, as shown in FIG. 4, the seat cover 111 that covers the seat cushion 101 is configured such that the portion that covers the main top plate 103 at the center of the seat surface is formed of a conductive skin material 113. The left and right end portions are stitched with another skin material 115 that covers the top plate support portion 105 (the seam 113s). And the copper tape 117 as a connection member is affixed to the seam allowance 113n, and the conductive fiber woven in the left-right direction and the copper tape 117 are electrically connected to the conductive skin material 113. Suspension cloth 121 is also sewn on the stitched portion 119 between the conductive skin material 113 and the other skin material 115 so as to extend the seam allowance 115n of the other skin material 115 that covers the top plate support portion 105. The wire 121w is held at the tip. The wire 121w is locked to the insert wire 125 embedded in the bottom of the groove 123 formed in the seat pad 121. As a result, the stitched portion 119 between the conductive skin material 113 and another skin material 115 is suspended in the groove portion 123, and the seam allowance 113 n of the conductive skin material 113 to which the copper tape (connecting member) 117 is attached is formed in the groove portion 123. It is arranged. Thus, according to the structure by which a connection member is arrange | positioned by the groove part of a seat pad, it is hard to produce discomfort by a connection member to a seated person.

JP 2010-94283 A

  By the way, in the said conventional sheet | seat, since the copper tape 117 is affixed on the seam allowance 113n of the electroconductive skin material 113, until the electroconductive fiber distribute | arranged to the main top-plate part 103 straddles the seam 113s and reaches the seam allowance 113n. It must be surely connected. However, every time an occupant sits on the seat cushion 101, the conductive skin material 113 is repeatedly bent and stretched at the seam 113s, and the conductive fibers may be disconnected. This is because the conductive skin material 113 is disposed substantially horizontally on the main top plate portion 103 and is turned downward at the seam 113 s so that the seam allowance 113 n is accommodated in the groove portion 123. Although it is bent, as shown in FIG. 5, a downward load is applied to the main top plate portion 103 by the seated person H, and the conductive skin material 113 bends downward, so that the degree of bending increases. It is. Here, the inventor has also focused on the portion of the seam allowance 113 n of the conductive skin material 113. The seam allowance 113n is arranged on the inner side of the seat surface (the main top plate 103 side) defined by the hanging cloth 121 arranged substantially vertically in a state where the seam margin 113 is tensioned downward. When the behavior of the seam allowance 113n in the groove portion 123 was observed and investigated, when the conductive skin material 113 was bent downward in the top plate main portion 103 due to the load of the seated person H as shown in FIG. It became clear that the seam allowance 113n pivots upward so that the skin material 113 makes a U-turn around the seam 113s, and the degree of bending of the conductive skin material 113 is increased. This is remarkable when the urethane foam sheet 114 or the like is laminated on the back surface of the conductive skin material 113 and the sheet cover 111 is bulky. In addition, by laminating a foamed urethane sheet on the back side of the surface material, for example, the feel of the surface of the sheet is kept soft, and the unevenness of the seat pad surface forming the seating surface is absorbed, and by repeatedly sitting, the skin Laminated structures are employed in many seat covers because it can improve the seating comfort and appearance of the seat, such as preventing wrinkles in the material.

  The present invention has been made based on the above knowledge, the central portion of the seating surface is made of a conductive skin material, and is suspended in the groove portion of the seat pad at the end of the conductive skin material. In a vehicle seat in which a connecting member is connected to a conductive fiber included in a conductive skin material at a seam allowance, an object is to reduce disconnection of the conductive fiber due to repeated application of a seated person's load. .

  The present invention includes a seat pad that forms a seating surface, and a seat cover that covers the seat pad. The seating surface of the seat pad mainly includes a central pad portion that receives a load of a seated person, and the central pad portion. Side pad portions arranged on both sides are formed with a groove portion interposed therebetween, and the seat cover includes a central cover piece that covers the central pad portion and a side cover piece that covers the side pad portion. The central cover piece and the side piece are stitched together, and the central cover piece includes a conductive fiber, and the conductive fiber covers the side cover from a position covering the central pad portion of the central cover piece. The seam allowance for sewing with the piece is arranged and connected to the connecting member at the seam allowance, and the center cover piece and the side cover pin are connected. Suspension cloth is sewn to the stitching portion with the sleeve, and the tip of the suspension cloth is locked to the bottom of the groove portion, and the stitching portion between the center cover piece and the side cover piece is suspended from the groove portion. The connecting portion between the conductive fiber and the connecting member for the seam allowance of the central cover piece is located on the outer side of the seat (on the side pad portion side) than the suspension cloth. This is a vehicle seat.

  According to such a vehicle seat, the connecting portion between the conductive fiber for the seam allowance of the central cover piece and the connecting member is located on the side pad portion side of the hanging cloth that divides the groove portion in the width direction (left-right direction). Therefore, the degree of bending at the seam with the hanging cloth of the central cover piece is smaller than that of the conventional case. In addition, even if a seated person's load is applied to the position covering the central pad portion of the central cover piece, the connecting portion between the conductive fiber of the seam allowance and the connecting member is displaced toward the central pad by the hanging cloth. Therefore, the degree of bending at the seam with the hanging cloth of the central cover piece is difficult to increase. Thus, since the change of the bending state in the seam with the hanging cloth of the center cover piece is small depending on the presence or absence of the seating, even if the seating is repeated, the conductive fibers included in the center cover piece are not easily fatigued and are not easily disconnected.

  According to the present invention, the central portion of the seating surface is made of a conductive skin material, and is included in the conductive skin material at the seam allowance suspended in the groove portion of the seat pad at the end of the conductive skin material. In the vehicle seat in which the connection member is connected to the conductive fiber, the disconnection of the conductive fiber due to repeated application of the seated person's load can be reduced.

It is a perspective view of a sheet concerning an embodiment of the present invention. It is II-II sectional drawing of the sheet | seat shown by FIG. 1, and is a figure which shows the state which is not seated on the sheet | seat. It is sectional drawing shown in the state which has seated the sheet | seat shown by FIG. It is sectional drawing of the sheet | seat which shows the structure which draws in the seat cover provided in the conventional sheet | seat in the groove part of a seat pad, and is a figure which shows the state which is not seated on the sheet | seat. It is sectional drawing shown in the state which has seated the sheet | seat shown by FIG.

  Hereinafter, an embodiment of the present invention will be described with reference to FIGS. As shown in FIG. 1, the seat 11 according to the present embodiment includes a seat cushion 13 that constitutes a seating surface 13a, a seatback 15 that constitutes a backrest surface 15a, and a headrest 17. The present embodiment is an example of an embodiment in which the present invention is applied to the seat cushion 13. In the present specification, the front, rear, left and right of the seat are shown as directions viewed from the occupant seated in the normal seating posture on the seat.

  The seat cushion 13 is formed with an outer shape of a seating surface 13a by covering a seat frame (not shown) with a seat pad 21. About this structure, a change is not required from the conventional sheet | seat. The upper surface of the seat pad 21 is formed so that the central pad portion 23 at the central position that directly supports the load of the seated person is substantially flat, and the side pad portions 25 and 25 on both the left and right side portions are formed so as to rise, and the seat surface 13a. Has a shape that can hold the occupant so as to wrap. Grooves 27, 27 are formed at the boundary between the center pad portion 23 and the side pad portions 25, 25 so as to extend in the front-rear direction. The seat pad 21 is covered with a seat cover 41 along its outer surface, and the seat cover 41 is suspended in the grooves 27 and 27. The hanging structure will be described later.

  The seat cover 41 is formed into a bag shape by sewing a plurality of cover pieces (small pieces of skin material) formed by cutting the skin material. A portion of the seat cover 41 that covers the seating surface 13a is formed by stitching a central cover piece 45 that covers the central pad portion 23 of the seat pad 21 and side cover pieces 47 and 47 that cover the side pad portions 25 and 25. Is formed. The central cover piece 45 covering the central pad portion 23 is obtained by cutting the conductive skin material 43, and the side cover pieces 47, 47 covering the side pad portions 25, 25 are made of a non-conductive skin material. It has been cut. Further, a cover piece covering the side surface of the seat pad 21 is stitched to form a bag-like seat cover 41, which is put on the seat pad 21.

  The conductive skin material 43 constituting the central cover piece 45 is a skin material containing conductive fibers 43s. The conductive fiber 43s is a conductive fiber. The material and form of the conductive fiber 43s are not limited, and examples thereof include a fiber made of a metal or alloy such as copper or stainless steel, a fiber obtained by plating a metal or alloy on the surface of a core fiber, or a carbon fiber. . These fibers may be used alone or twisted with other fibers. The skin material here includes both a material composed of a single surface material exposed on the outer surface of the seat cushion 13 and a composite in which a thin foamed urethane sheet or the like is laminated on the back surface of the surface material. . The surface material is made of, for example, a woven fabric, a knitted fabric, a non-woven fabric, leather or synthetic leather. As a form in which the conductive fiber 43s is included in the conductive skin material 43, for example, a conductive fiber 43s is woven, knitted, sewn, or bonded to the surface material.

  As shown in FIG. 2, the conductive skin material 43 of the present embodiment is obtained by laminating a cover pad 43 b made of sheet-like foamed urethane on the back surface of a surface material 43 a woven with conductive fibers 43 s. . The central cover piece 45 is obtained by cutting the conductive skin material 43 so that the conductive fibers 43 s are oriented in the left-right direction of the sheet 11, and is conductive along the left-right direction of the sheet 11 as shown in FIG. 1. A plurality of conductive fibers 43 s are woven, and both ends of the conductive fibers 43 s reach the left and right ends of the central cover piece 45 that is sewn to the side cover pieces 47 and 47.

  As shown in FIG. 2, the center cover piece 45 and the side cover piece 47 are stitched together by stitching together in the middle table (seam S1), and the end of each cover piece 45, 47 has a seam allowance of 45n. 47n are arranged at positions not exposed to the outer surface of the seat cushion 13 inside the seat cover 41. At the seam allowance 45n of the central cover piece 45, the connection member 51 is sewn so as to sandwich the front and back surfaces thereof, and the conductive fibers 43s in the central cover piece 45 (conductive skin material 43) and the connection member 51 are connected. ing. That is, in the central cover piece 45, the conductive fibers 43s are woven into the surface material 43a made of a woven fabric, and the surface of the woven fabric is raised and lowered. The connection member 51 is also made of a woven fabric so that the conductive fibers are exposed on the surface, and the conductive fibers in the connection member 51 are electrically connected to the conductive fibers in the surface material 43a by overlapping the surface material 43a. be able to. In addition, as the conductive fiber woven into the connection member 51, the conductive fiber can be used.

  The stitched portion of the central cover piece 45 and the side cover piece 47 configured as described above is suspended in a groove portion 27 formed on the upper surface of the seat pad 21. In relation to the hanging structure, a hanging cloth 49 is also sewn at a stitched portion between the central cover piece 45 and the side cover piece 47. The suspending cloth 49 is formed by folding a belt-like cloth in half, and the overlapped end side is sewn together with the central cover piece 45 and the side cover piece 47 (seam S1), and the central pad is larger than the seam allowance 45n of the central cover piece 45. It is arranged on the part 23 side. Then, a suspension wire 49w is inserted and held in the trapped tip portion. A plurality of openings 49h are provided at the distal end portion of the suspending cloth 49 which is a tie, with a space in the longitudinal direction, and the suspending wire 49w is exposed. An insert wire 33 is embedded in the bottom of the groove portion 27, and the suspension wire 49 w exposed from the opening 49 h of the suspension cloth 49 and the insert wire 33 embedded in the seat pad 21 are bound by a hog ring 35. As a result, the state where the stitched portion of the center cover piece 45 and the side cover piece 47 is suspended in the groove 27 is maintained.

  According to the seat cushion 13 having the above-described configuration, the conductive fibers 43s are arranged on the central cover piece 45 at the center of the seating surface 13a with which the seated person mainly comes into contact. It can be used as an electrode or heater of a type sensor. Here, the connection member 51 for supplying electricity to the conductive fiber 43s is connected to the conductive fiber 43s at the sewing margin 45n with the side cover piece 47 at the end of the central cover piece 45, and has a sewing allowance due to the suspended structure. Since 45n is housed in the groove 27 of the seat pad 21, the discomfort caused by the connecting member 51 is not caused to the seated person H as shown in FIG. And the seam allowance 45n of the center cover piece 45 to which the connecting member 51 is connected is arranged on the side pad portion 25 side with respect to the hanging cloth 49. Therefore, the hanging cloth 49 acts like a barrier, and the seam allowance 45n cannot be displaced toward the central pad portion 23. Therefore, as shown in FIG. 3, even if the portion covering the central pad portion 23 of the central cover piece 45 is bent downward by the load of the seated person H, the displacement of the seam allowance 45n is separated by the hanging cloth 49 of the groove portion 27. Therefore, the change in the degree of bending of the central cover piece 45 at the seam S1 is suppressed to be small. Therefore, the conductive fibers 43s included in the central cover piece 45 are not easily fatigued and are not easily disconnected.

The means for connecting the connection member 51 to the conductive fiber 43s at the seam allowance 45n of the center cover piece 45 is not limited to the method of the present embodiment. For example, at the end of the seam allowance 45n, excess members may be removed to expose the conductive fibers and connect the connecting members.
Moreover, in this embodiment, although the structure which penetrates and hold | maintains the suspension wire 49w in the part which became the hook of the suspension cloth 49 was illustrated as a structure which concerns on a suspension structure, it replaces with this structure and is a strip | belt-shaped suspension cloth. A wire may be integrally formed with resin at one end along the longitudinal direction. Further, the configuration for maintaining the state in which the seat cover 41 is suspended from the seat pad 21 is not limited to the method of binding the suspension wire 49w on the seat cover 41 side and the insert wire 33 on the seat pad 21 side. Absent. For example, a linear member provided with a plurality of locking projections at intervals in the longitudinal direction in place of the suspension wire 49w, and a locking that can prevent the projection of the linear member in place of the insert wire 33. A member having a hole is embedded in the seat pad 21, and the locking projection of the linear member on the seat cover 41 side is inserted into the locking hole on the seat pad 21 side to prevent the suspension, thereby maintaining the suspended state. be able to. Further, for example, the inner side of the seat cover 41 and the bottom surface of the groove portion 27 of the seat pad 21 may be fastened with a hook-and-loop fastener.

  The present invention can be applied not only to the seat cushion 13 but also to the seat back 15.

DESCRIPTION OF SYMBOLS 11 Seat 13 Seat cushion 13a Seat surface 21 Seat pad 23 Central pad part 25, 25 Side pad part 27, 27 Groove part 33 Insert wire 35 Hog ring 41 Seat cover 43 Conductive skin material 43s Conductive fiber 45 Central cover piece 45n Seam allowance 47 Side Cover piece 49w Wire 49 Hanging cloth 51 Connection member

Claims (1)

A seat pad that forms a seating surface; and a seat cover that covers the seat pad. The seat pad includes a central pad portion that mainly receives a load of a seated person and both sides of the central pad portion. The seat cover includes a center cover piece that covers the center pad portion and a side cover piece that covers the side pad portion, and the center cover A piece and the side piece are sewn, and the central cover piece includes conductive fibers, and the conductive fibers are sewn to the side cover piece from a position covering the central pad portion of the central cover piece. And is connected to the connecting member at the seam allowance, and the center cover piece and the side cover piece are sewn together. Suspension cloth is sewn on the part, the tip of the suspension cloth is locked to the bottom of the groove, and the stitched portion of the center cover piece and the side cover piece is suspended in the groove A vehicle seat,
The vehicle seat, wherein a connecting portion between the conductive fiber and the connecting member at a seam allowance of the central cover piece is located outside the seat with respect to the hanging cloth.

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