JP2011116291A - Vehicle seat - Google Patents

Abstract

<P>PROBLEM TO BE SOLVED: To provide a vehicle seat having a simple constitution and capable of reliably supporting a waist part of an occupant during the normal seating, and rapidly protecting a neck of the occupant by a headrest when the vehicle is subjected to a rear end collision. <P>SOLUTION: The vehicle seat 10 includes a supporting plate which is elastically supported on the inner side of a seat back frame, a pair of right and left longitudinal wires 61 which are arranged on a back side of the supporting plate 32 and extend in the vertical direction, and a headrest 13 mounted on upper ends of the longitudinal wires 61 via a headrest supporting frame 17, and further includes a headrest driving mechanism 15 for displacing the headrest 13 forwardly or forward-and-diagonal upwardly via the headrest supporting frame 17 by displacing the longitudinal wires 61 backwardly and upwardly by the backward load transmitted to the supporting plate 32. An upper transverse wire 63 abutted on or close to a back side of a lower part of the supporting plate 32 is stretched between the pair of right and left longitudinal wires 61. <P>COPYRIGHT: (C)2011,JPO&INPIT

Description

  The present invention relates to an improvement in a vehicle seat.

  When the vehicle is collided, as the vehicle moves forward, the head of the vehicle occupant moves backward due to the inertial force, causing the neck to bend backward or forward Bending (so-called “whipping”) may occur, requiring protection of the occupant's neck.

  Therefore, the rearward load generated by the occupant's rearward movement immediately after the rear-end collision is received by the seat back that constitutes the seat, and the headrest is moved forward or obliquely upward using the load to prevent the occupant's head from moving. A headrest structure is adopted.

  As a conventional vehicle seat equipped with such an active headrest structure, a vertical pressure receiving member is provided in the seat back, and the vertical pressure receiving member receives a backward load from the occupant and is connected to the vertical pressure receiving member. There is known one having a structure in which the headrest is moved diagonally forward and upward at the time of a rear-end collision (see, for example, Patent Document 1).

  According to FIGS. 2 and 3 of Patent Document 1, the rotation links 14 are rotatably attached to the upper left and right sides of the seat back frame 18 provided in the seat back 10, respectively. A pair of left and right guide members 44 are attached to the lower member 18c connecting the two, and the support shaft 20 is passed to the left and right rotation links 14 so as to be eccentric with respect to the rotation center of the rotation link 14. A holder bracket 24 is attached to the upper end of the holder bracket 24, and the headrest 12 is attached to the upper end of the holder bracket 24 via a stay 22.

  Further, a continuous support link 40 is swingably connected to the rotating link 14, and a support plate 54 is elastically supported by the continuous support link 40 via a spring member 51, and behind the support plate 54, A pair of left and right vertical pressure receiving members 34 that are attached to the support shaft 20 and whose lower ends are inserted into the guide holes 36 of the guide member 44 through the sliding rods 46 are disposed, and left and right continuous support links. A horizontal pressure-receiving member 38 is passed between 40.

  When the vehicle collides, a rearward load is generated that pushes the vertical pressure receiving member 34 through the support plate 54 to the occupant. The vertical pressure receiving member 34 is moved upward by this load and is horizontally installed on the support plate 54. When the pressure receiving member 38 is pressed, the continuous support link 40 rotates the rotation link 14 so that the headrest 12 moves obliquely upward and forward.

JP 2008-18842 A

  When a vehicle occupant sits on the seat and the occupant's waist presses the seat back 10, the support plate 54 moves rearward through the seat cushion of the seat back 10, but as shown in FIG. Since the installation pressure member 34 is far behind the support plate 54, the support plate 54 is difficult to move to the position of the vertical pressure reception member 34 in the normal seating state of the occupant. Therefore, it is difficult to secure a supporting force for supporting the occupant's waist.

  Even if the support plate 54 presses the vertical pressure receiving member 34, if the distance between the left and right vertical pressure receiving members 34 is narrow, the waist is supported in a narrow range, and sufficient waist support is not performed. .

  Further, the active headrest structure includes, as main components for operating the headrest 12, a vertical pressure receiving member 34, a continuous support link 40, and a horizontal pressure receiving member 38. The continuous link 40 includes a long link 48, Since it is comprised from the short link 50 and the pivot pins 52 and 53, the number of parts increases and it causes a cost increase.

  Further, since the support plate 54 and the vertical pressure receiving member 34 are largely separated from each other, and the horizontal pressure receiving member 38 is further separated from the support plate 54 more than the vertical pressure receiving member 34, when the vehicle is bumped, The time until the support plate 54 presses the vertical pressure receiving member 34 and the horizontal pressure receiving member 38 becomes longer, that is, the time until the headrest moves after the rear-end collision becomes longer.

  An object of the present invention is to provide a vehicle seat that can reliably support a lumbar portion during normal seating of an occupant, and can quickly protect the occupant's neck by a headrest when the vehicle is rearranged, and has a simpler configuration. Is to provide.

  According to the first aspect of the present invention, a seat back frame serving as a skeleton of the seat back, a support plate elastically supported on the inner side of the seat back frame, and disposed on the back side of the support plate and extending vertically. A pair of left and right vertical wires, and a headrest attached to the upper ends of these vertical wires via a headrest support frame, and the vertical wires are displaced rearward and upward by a backward load transmitted to the support plate In a vehicle seat provided with a headrest driving mechanism that displaces the headrest forward or obliquely upwardly forward via the headrest support frame, a first abutting or approaching the back surface of the lower portion of the support plate between the pair of left and right vertical wires A transverse wire is passed.

  When the vehicle collides, the seat moves forward relative to the occupant seated on the seat, so that the seat support plate receives a backward load from the occupant. As a result, the support plate moves rearward in the seat back and presses the first horizontal wire, and the backward load is directly transmitted from the first horizontal wire to the left and right vertical wires.

  As a result, the left and right vertical wires are displaced rearward and upward, and the headrest is displaced forwardly or obliquely upwardly through the headrest support frame, so that the headrest prevents the occupant's head from moving backward, and the occupant's neck Is protected.

  The first horizontal wire is in contact with or close to the back surface of the support plate. Further, since the first horizontal wire is passed to the vertical wire, the backward load acting on the support plate is transferred from the support plate to the horizontal wire and the horizontal wire. It travels quickly from wire to vertical wire.

  When the occupant is normally seated, the occupant's lower back portion presses the first horizontal wire and the vertical wire via the support plate, and the occupant's lower back portion is supported by this reaction force. Since the first horizontal wire is provided between the left and right vertical wires, the first horizontal wire reliably supports a wider range of the waist.

  In the invention according to claim 2, the second horizontal wire disposed below the first horizontal wire is passed between the pair of left and right vertical wires, and the second horizontal wire is provided at the lower portion of the support plate. It is arranged to face the back surface and be separated from the support plate more backward than the first horizontal wire.

The occupant's waist is supported by the first horizontal wire and the left and right vertical wires, and the displacement of the left and right vertical wires when the vehicle is impacted is performed by both the first horizontal wire and the second horizontal wire. .
In addition, when the occupant is normally seated, the support plate only hits the first lateral wire, so that the support force that supports the occupant's waist is not excessive.

The invention according to claim 3 is characterized in that the first horizontal wire and the second horizontal wire are provided so as to be elastically deformable, and the second horizontal wire is less likely to be elastically deformed than the first horizontal wire.
Due to the second horizontal wire that is not easily elastically deformed, the displacement of the vertical wire becomes faster.

  In the invention according to claim 1, the first horizontal wire that is in contact with or close to the back surface of the lower portion of the support plate is passed between the pair of left and right vertical wires. The rear load can be transmitted more quickly from the support plate to the vertical wire with the wire, and the response of the headrest displacement immediately after the rear-end collision can be improved. Can support a wide range of the waist.

  The main structure for occupant neck protection and waist support is composed of left and right vertical wires and horizontal wires such as the first horizontal wire, reducing the number of parts in the vehicle seat and reducing costs. be able to.

  In the invention which concerns on Claim 2, the 2nd horizontal wire arrange | positioned below the 1st horizontal wire is passed between a pair of right and left vertical wires, and this 2nd horizontal wire is a lower part of a support plate. Since it is arranged opposite to the back surface and rearward from the support plate rather than the first horizontal wire, the vertical wire is more surely secured by both the first horizontal wire and the second horizontal wire when the rear-end collision occurs. Can be displaced.

  In addition, when the occupant is normally seated, only the first lateral wire can be brought into contact with the support plate, the occupant's waist support force can be set appropriately, and the riding posture can be stabilized.

  In the invention according to claim 3, when the first horizontal wire and the second horizontal wire are provided so as to be elastically deformable, and the second horizontal wire is less elastically deformed than the first horizontal wire, The second lateral wire is less likely to bend due to the backward load, the longitudinal wire can be displaced more quickly, and the response of the headrest displacement can be improved.

It is explanatory drawing of the vehicle seat which concerns on this invention. It is a perspective view which shows the seat back inside of the vehicle seat which concerns on this invention. It is a rear view which shows the seat back inside of the vehicle seat which concerns on this invention. It is a side view which shows the seat back inside of the vehicle seat which concerns on this invention. It is sectional drawing which shows the seat back principal part of the vehicle seat which concerns on this invention. It is a perspective view which shows the seat back lower part of the vehicle seat which concerns on this invention. It is the 1st operation figure showing an operation of the seat back of the vehicular seat concerning the present invention. It is a 2nd operation | movement figure which shows the effect | action of the seat back of the vehicle seat which concerns on this invention.

  Embodiments of the present invention will be described below with reference to the accompanying drawings. In the description, left, right, front, and rear indicate directions based on the driver who has boarded the vehicle. The drawings are to be viewed in the direction of the reference numerals.

Examples of the present invention will be described. The arrow (FRONT) in the figure represents the front of the vehicle.
As shown in FIG. 1, a seat 10 includes a seat cushion 11 having a seating surface 11a, a seat back 12 serving as a backrest attached to the rear end portion of the seat cushion 11 so as to be able to swing back and forth, and the seat back 12 The headrest 13 is attached to the upper end of the headrest.

The seat back 12 includes a headrest drive mechanism 15 that moves the headrest 13 forward or obliquely upward in the forward direction when the vehicle collides.
The headrest 13 is an active headrest that can be driven by the headrest driving mechanism 15 in the seat back 12, and a pair of left and right mounting stays 13 a protrude downward from the lower surface, and these mounting stays 13 a are provided on the upper part of the headrest driving mechanism 15. The pair of left and right square pipe-shaped headrest support frames 17 are detachably inserted.
The headrest 13 and the headrest drive mechanism 15 constitute a neck protection mechanism 20 that protects the occupant's neck.

As shown in FIG. 2, the seat back 12 includes a seat back frame 21 serving as a skeleton and a headrest driving mechanism 15 attached to the seat back frame 21.
The seat back frame 21 is a rectangular frame-shaped member comprising a pair of left and right seat side frames 23, 23, and an upper frame 26 and a lower frame 27 that connect the upper ends and lower ends of the seat side frames 23, 23, respectively. It is.

  The headrest driving mechanism 15 includes a spring member 31 made of a corrugated wire extending from the seat side frames 23, 23 of the seat back frame 21, a resin support plate 32 whose back surface 32a is elastically supported by the spring member 31, a seat side A swing mechanism 33 provided on the frames 23 and 23 for swinging the headrest 13 (see FIG. 1), and a wire provided on the back surface 32a side of the support plate 32 with an upper end connected to the swing mechanism 33. The assembly 34 includes a pair of left and right wire support members 36 and 36 that support the lower end portion of the wire assembly 34 and are attached to the seat side frames 23 and 23 side.

  The spring member 31 extends straight from the seat side frames 23, 23 toward the seat center in the vehicle width direction, and is bent downward from the straight portions 31a, 31a toward the seat center in the vehicle width direction. The lower bent portions 31c and 31c extend, and the upper bent portion 31e that connects the lower bent portions 31c and 31c so as to be bent upward.

The support plate 32 is rotatable about the straight portions 31a and 31a of the spring member 31, and flanges 32c, 32d, and 32e that are hung on the spring member 31 are integrally formed on the back surface 32a.
The flange portions 32 c and 32 e are respectively hooked on the straight portions 31 a and 31 a of the spring member 31, and the flange portion 32 b is hooked on the upward bent portion 31 e of the spring member 31.

  As shown in FIG. 3, the support plate 32 is provided with constricted portions 32g, 32g and lateral projecting portions 32h, 32h located below the constricted portions 32g, 32g and projecting on both sides. A lower projecting portion 32j projecting downward is provided at the lower portion.

  Between the side protrusions 32h and 32h of the support plate 32 is a portion corresponding to the height position of the lumbar spine of the occupant seated on the seat 10 (see FIG. 1), and the upper horizontal wire 63 is arranged behind this position. ing.

  The lower part of the downward projecting portion 32j corresponds to the height position of the lower part of the occupant's lumbar vertebra or the upper part of the pelvis (specifically, the sacral spine), and is the base part when the occupant is seated. Sometimes, a backward load is easily applied when the occupant moves backward due to inertia.

  Therefore, by arranging the lower horizontal wire 64 behind this portion, the lower portion of the downward projecting portion 32j hits the straight portion 64b of the lower horizontal wire 64, and a rearward load is easily transmitted to the lower horizontal wire 64 and the vertical wires 61, 61. Accordingly, the rearward movement of the vertical wires 61 and 61 can be reliably and quickly performed.

  The swing mechanism 33 is swingably attached to swing bases 41 and 41 attached to the seat side frames 23 and 23, and to the swing bases 41 and 41 via support shafts 43 made of bolts, respectively. The swinging plates 45, 45, the swinging frame 47 mounted between the swinging plates 45, 45, and a pair of left and right wire connecting members 51 mounted on the swinging frame 47. 51, a headrest support frame 17, which is attached to the swing frame 47 and the wire connecting members 51, 51 so as to extend upward and into which the mounting stays 13a, 13a (see FIG. 1) of the headrest 13 (see FIG. 1) are inserted. 17.

  An upper plate 53 is attached to the front side of the seat side frames 23, 23 and the upper frame 26 of the seat back frame 21, and a pair of left and right frame holders 54, 54 are attached to the upper plate 53. 54, the headrest support frames 17, 17 are held so as to be movable back and forth.

The swing mechanism 33 is provided with tension coil springs 56 and 56 for biasing and holding the headrest 13 (see FIG. 1) in a normal normal position.
The tension coil spring 56 is passed and hung on the swing plates 45 and 45 and spring receiving pieces 57 attached to the seat side frames 23 and 23, respectively.

  The wire assembly 34 has a pair of left and right vertical wires 61 and 61 extending in the vertical direction and having upper ends connected to the wire connecting members 51 and 51, respectively, and upper horizontal portions passed to the lower portions of the vertical wires 61 and 61. A wire 63, a lower horizontal wire 64 passed between the vertical wires 61 and 61 so as to be positioned below the upper horizontal wire 63, and left and right wire support members attached to the lower portions of the vertical wires 61 and 61, respectively. The lower end horizontal wire 66 is passed between 36 and 36.

The lower ends of the vertical wires 61 and 61 are integrally connected by a connecting portion 67.
The upper horizontal wire 63 includes upper horizontal portions 63a and 63a extending in the vehicle width direction, and is bent from the upper horizontal portions 63a and 63a and extends in the vertical direction, and is fastened to the vertical wires 61 and 61 by caulking members 68 and 68, respectively. An integrally molded product comprising crimped vertically elongated parts 63c, 63c, inclined parts 63e, 63e extending obliquely downward from these vertically elongated parts 63c, 63c, and a lower horizontally elongated part 63g connecting these inclined parts 63e, 63e. is there.

  The lower horizontal wire 64 is a member in which both ends of one wire are bent in a U-shape, and the U-shaped portions 64a and 64a at both ends are connected by the straight portion 64b and are connected to the vertical wires 61 and 61, respectively. Each is installed.

  The lower end horizontal wire 66 has a central portion 66a bent upward and is connected to a connecting portion 67 by a crimping member 69, and both ends are bent so as not to come out of the wire support members 36 and 36. Reference numeral 71 denotes a lower connecting frame passed to the left and right seat side frames 23, 23, and wire support members 36, 36 are attached to the lower connecting frame 71.

  As shown in FIG. 4, the upper horizontal wire 63 is disposed so that the lower horizontal portion 63 g hits the back surface 32 a of the support plate 32, and the straight portion of the lower horizontal wire 64 is positioned rearward from the back surface 32 a of the support plate 32. 64 b is arranged, and the upper horizontal wire 63 and the lower horizontal wire 64 are supported by a pair of left and right vertical wires 61. Reference symbol D denotes the distance between the back surface 32a and the straight portion 64b of the lower horizontal wire 64.

  In this way, the lower horizontal wire 64 is disposed opposite to the lower back surface 32a of the support plate 32 and further rearward from the support plate 32 than the upper horizontal wire 63. Therefore, when the occupant is normally seated, the support plate 32 moves rearward and hits the upper horizontal wire 63 and does not hit the lower horizontal wire 64.

  For example, when both the upper lateral wire 63 and the lower lateral wire 64 are brought into contact with the back surface 32a of the support plate 32 as the support plate 32 moves backward during normal sitting, the upper lateral wire 63 and the lower lateral wire 64 are bent. Therefore, the forward reaction force generated in the support plate 32 becomes excessive, and it becomes difficult to properly support the occupant's waist.

  On the other hand, as described above, by allowing only the upper lateral wire 63 to contact the back surface 32a of the support plate 32 during normal seating, it is possible to ensure the occupant's waist support force and to ensure that the waist is properly attached. It can be supported with a supporting force.

  The upper horizontal wire 63 and the lower horizontal wire 64 can be elastically deformed with respect to a backward load applied from the support plate 32, and the lower horizontal wire 64 is set to be less elastically deformed than the upper horizontal wire 63. .

The vertical wire 61 has an upper end 61a attached to the wire connecting member 51 and a lower end horizontal wire 66 attached to the lower end 61b.
The lower end lateral wire 66 is movably passed through a pair of left and right wire support members 36 so as to be inclined forward and downward.

The swing plate 45 of the swing mechanism 33 includes a hook portion 45 a that hooks one end of the spring member 31. The spring member 31 supports the swing plate 45, the swing frame 47, the wire connecting member 51, and the headrest support frame 17. The shaft 43 is urged collectively around the axis 43 in the clockwise direction.
Accordingly, the pair of vertical wires 61 are in the most lowered state, and the lower end horizontal wire 66 is in contact with the front end portion 36 b of the inclined elongated hole 36 a of the wire support member 36.

As shown in FIG. 5, in the vertical wire 61, a bent portion 61 c provided on the upper end portion 61 a is applied to the lower portion of the round pipe-shaped swing frame 47 and a linear portion 61 d provided on the upper end portion 61 a is formed on the wire connecting member 51. More specifically, it is passed through a wire insertion hole 51b that penetrates the front protruding wall 51a, specifically, is formed in the front protruding wall 51a.
Therefore, the upper end portion 61a of the vertical wire 61 can be positioned by the front protruding wall 51a, and the upward pressing of the swing frame 47 by the bent portion 61c can be performed.

  The frame holder 54 is formed with a long frame insertion long hole 54a before and after passing through the headrest support frame 17, and the front end portion 54b and the rear end portion 54c of the frame insertion long hole 54a are moved in the front-rear direction of the headrest support frame 17, respectively. The left and right side portions 54d and 54d of the frame insertion elongated hole 54a (only the reference symbol 54d is shown) slide on both side surfaces of the headrest support frame 17 to guide the headrest support frame 17. Functions as a surface.

  As shown in FIG. 6, wire support members 36 and 36 (only one symbol 36 is shown) are attached to the lower connection frame 71 that is passed to the left and right of the lower portion of the seat back frame 21, and these wire support members 36 A lower end horizontal wire 66 is movably inserted through the 36 inclined elongated holes 36a.

Next, the operation of the headrest drive mechanism 15 of the vehicle seat 10 described above will be described.
In FIG. 7A, the occupant is seated on the seat 10 (see FIG. 1), and the lumbar portion of the occupant, specifically, the lumbar spine, is indicated by a predetermined portion 75 (black circle) on the support plate 32 of the seat back 12 as indicated by a white arrow. ) Is pressed rearward through a cushion material (not shown) of the seat back 12. Here, the predetermined portion 75 is on a horizontal line passing through the lower laterally long portion 63 g of the upper lateral wire 63.

  At this time, the upper horizontal wire 63 and the vertical wire 61 are bent backward compared to the state of FIG. 1, and a forward reaction force is generated on the support plate 32 due to the bending of the upper horizontal wire 63 and the vertical wire 61. Therefore, the occupant's waist is supported by this reaction force.

FIG. 7B shows a state in which the vehicle is rear-end collision in the state of FIG.
That is, as the vehicle moves forward, the occupant moves backward due to inertia, so that a backward load acts on the predetermined portion 77 from the occupant through the cushion material of the seat back 12 to the support plate 32 as indicated by an arrow A. And the state which the support plate 32 moved back is shown. Here, the predetermined portion 77 is on a horizontal line passing through the straight portion 64 b of the lower horizontal wire 64.

  At this time, the support plate 32 presses the upper horizontal wire 63 and the lower horizontal wire 64, so that the upper horizontal wire 63, the lower horizontal wire 64, and the vertical wire 61 move backward while being bent, and the lower end attached to the vertical wire 61. As shown by the arrow B, the partial horizontal wire 66 moves rearward and obliquely upward along the inclined long hole 36a of the wire support member 36.

  Since the lower horizontal wire 64 is less likely to be elastically deformed with respect to the upper horizontal wire 63, the lower horizontal wire 64 is bent compared to the case where the upper horizontal wire 63 and the lower horizontal wire 64 have the same ease of elastic deformation. The vertical wire 61 can be moved upward as indicated by the arrow C in a state where the operation loss is small, and the movement response of the vertical wire 61 can be improved.

  In FIG. 7C, as shown by an arrow E from the state of FIG. 7B, a backward load continues to act on the support plate 32, and the lower end lateral wire 66 supports the wire as shown by an arrow F. As shown by the arrow G, the vertical wire 61 has moved further upward as shown by the arrow G in FIG.

FIG. 8 shows the state of the headrest 13 in the state of FIG.
As the vertical wire 61 moves upward, the wire connecting member 51 and the swing frame 47 connected to the upper end portion 61a of the vertical wire 61 rotate about the support shaft 43, and the headrest support frame 17 moves forward. As a result, the headrest 13 moves forward from the initial position (position before the rear-end collision indicated by the two-dot chain line).
As a result, the rearward movement of the occupant's head is prevented by the headrest 13.

  As shown in FIGS. 1 and 3, the seat back frame 21 that is the skeleton of the seat back 12, the support plate 32 that is elastically supported inside the seat back frame 21, and the support plate 32 A pair of left and right vertical wires 61, 61 arranged on the back surface 32 a side and extending in the vertical direction, and a headrest 13 attached to the upper end portion 61 a of these vertical wires 61, 61 via headrest support frames 17, 17, And a headrest drive mechanism 15 that displaces the headrest 13 forward or obliquely upward through the headrest support frames 17, 17 by displacing the vertical wires 61, 61 rearward and upward by a backward load transmitted to the support plate 32. In the vehicle seat 10 provided with a support plate between the pair of left and right vertical wires 61, 61. Wherein the upper transverse wires 63 as the first transverse wires abutting or close to the bottom of bets 32 of the back 32a is passed.

  With the above configuration, when a rear-end collision occurs, a rearward load can be transmitted more quickly from the support plate 32 to the vertical wires 61 and 61 by the upper horizontal wire 63, and the responsiveness of the displacement of the headrest 13 immediately after the rear-end collision is improved. In addition, the upper horizontal wire 63 can be used to reliably support a wide range of the waist when the passenger is normally seated.

  The main structure for occupant neck protection and waist support is composed of left and right vertical wires 61 and 61 and horizontal wires such as an upper horizontal wire 63 and a lower horizontal wire 64 to be described later. The number of parts is reduced, and the cost can be reduced.

  As shown in FIG. 3 above, a lower horizontal wire 64 as a second horizontal wire disposed below the upper horizontal wire 63 is passed between the pair of left and right vertical wires 61, 61. Since the wire 64 faces the lower back surface 32a of the lower part of the support plate 32 and is arranged rearward from the support plate 32 rather than the upper horizontal wire 63, the upper horizontal wire 63 and the lower horizontal wire are collided. The vertical wires 61 and 61 can be displaced more reliably by both of them.

  Further, when the occupant is normally seated, only the upper horizontal wire 63 can be brought into contact with the support plate 32, the occupant's waist support force can be set appropriately, and the riding posture can be stabilized.

  Further, the upper horizontal wire 63 and the lower horizontal wire 64 are provided so as to be elastically deformable, and the lower horizontal wire 64 is less elastically deformed than the upper horizontal wire 63. , The vertical wires 61 and 61 can be displaced more quickly, and the responsiveness of the headrest 13 moving forward or obliquely upward can be improved.

  In the present embodiment, as shown in FIG. 4, the upper horizontal wire 63 is disposed so as to contact the back surface 32 a of the support plate 32, but not limited to this, the upper horizontal wire 63 is connected to the back surface of the support plate 32. You may arrange | position close to 32a. At this time, the upper horizontal wire 63 is disposed closer to the support plate 32 than the lower horizontal wire 64.

  The seat of the present invention is suitable for automobiles.

  DESCRIPTION OF SYMBOLS 10 ... Vehicle seat (seat), 12 ... Seat back, 13 ... Headrest, 21 ... Seat back frame, 32 ... Support plate, 32a ... Back surface, 61 ... Vertical wire, 63 ... First horizontal wire (upper horizontal wire) 64. Second horizontal wire (lower horizontal wire).

Claims (3)

A seat back frame as a skeleton of the seat back, a support plate elastically supported inside the seat back frame, a pair of left and right vertical wires disposed on the back side of the support plate and extending in the vertical direction, and A headrest attached to an upper end portion of the vertical wire via a headrest support frame, and the vertical wire is displaced rearward and upward by a backward load transmitted to the support plate, thereby allowing the headrest via the headrest support frame. In a vehicle seat provided with a headrest driving mechanism that displaces the headrest forward or obliquely upward,
A vehicular seat, wherein a first horizontal wire that is in contact with or close to a lower back surface of the support plate is passed between the pair of left and right vertical wires.   A second horizontal wire disposed below the first horizontal wire is passed between the pair of left and right vertical wires, and the second horizontal wire is opposed to the back surface of the lower portion of the support plate. The vehicle seat according to claim 1, wherein the vehicle seat is disposed rearwardly from the support plate than the first horizontal wire.   The first horizontal wire and the second horizontal wire are provided so as to be elastically deformable, and the second horizontal wire is less likely to be elastically deformed than the first horizontal wire. Vehicle seat.

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