JP2018144754A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat in which a back cover is hardly deformed. SOLUTION: A vehicle seat S having a seat back S2 that supports a back portion of an occupant, the seat back being a skeleton, a seat back frame F3, a back cover C2 coupled to the back of the seat back frame, a back The connecting member 10 is disposed between the cover and the seat back, and the connecting member is provided with a leg piece portion 16 extending from the seat back frame, and a cover coupling provided at a protruding end of the leg piece portion and coupled to the back cover. And the leg piece is less rigid than the cover joint. [Selection] Figure 5

Description

  The present invention relates to a vehicle seat mounted on an automobile or the like, and more particularly to a vehicle seat provided with a mechanism for reducing a load applied to an occupant when an impact load is applied.

  A vehicle seat having a seat back with a back cover attached to the back of a seat back frame is known (for example, Patent Document 1). In the vehicle seat described in Patent Document 1, the back cover is attached to the back side of the seat back frame, and the pad serving as a cushioning material is assembled to the front side of the seat back frame, and the entire seat back is encapsulated by the cover. Is configured.

JP 2003-189975 A

  However, when a collision load is applied to the vehicle seat described in Patent Document 1, a load in a direction that causes a relative displacement between the back cover and the seat back frame is applied to a joint portion between the back cover and the seat back frame. There was a problem of deformation.

  In view of the above background, an object of the present invention is to provide a vehicle seat in which a back cover is hardly deformed.

  In order to solve the above-described problem, a vehicle seat (S) having a seat back (S2) for supporting a back of an occupant, the seat back being a skeleton, a seat back frame (F3), and the seat back frame A back cover (C2) coupled to the back surface of the vehicle and a connecting structure (10, 110) disposed between the back cover and the seat back, the connecting structure extending from the seat back frame. The vehicle seat includes a leg piece portion (16, 116) and a cover coupling portion provided at a protruding end of the leg piece portion and coupled to the back cover, wherein the leg piece portion is less rigid than the cover coupling portion. Is provided.

  According to this configuration, since the load generated at the joint portion between the back cover and the seat back frame is absorbed by the deformation of the leg piece, the back cover is hardly deformed.

  In the above configuration, the width of the leg piece portion in a direction orthogonal to the direction in which the leg piece portion extends is preferably smaller than that of the cover coupling portion.

  According to this structure, the rigidity of a leg piece part can be easily set low by the width | variety of a leg piece part.

  In the above configuration, the back cover extends in the vertical direction, one end in the vertical direction of the back cover is coupled to the seat back frame, and the other end of the back cover is coupled to the seat back frame by the connection structure. It is good that it is combined with.

  According to this configuration, when a collision load is applied, the shear load generated by the rearward deflection of the seat back frame is absorbed by the deformation of the leg pieces, and the back cover is hardly deformed. Further, since the back cover has a structure extending in the vertical direction, the back cover can be more reliably coupled to the seat back frame.

  Further, in the above configuration, the connection structure includes the leg piece portion, the cover coupling portion, and a frame coupling portion that is provided at a base end of the leg piece portion and is coupled to the seat back frame. The cover coupling part and the frame coupling part may be arranged vertically.

  According to this configuration, since the direction of the load applied to the leg piece when the seat back frame is bent rearward is determined in the vertical direction, it is easy to adjust the rigidity of the leg piece.

  In the above configuration, the width of the leg piece portion in the left-right direction is preferably smaller than the width of the cover joint portion and the frame joint portion in the left-right direction.

  According to this configuration, it is possible to set the rigidity of the leg piece portion to be lower than that of the back cover by reducing the width of the leg piece portion in the left-right direction.

  In the above configuration, the connecting member may be configured to couple the seat back frame and a lower end of the back cover.

  According to this configuration, the assembly of the seat back frame and the back cover is facilitated.

  In the above configuration, it is preferable that the cover coupling portion is disposed apart from the seat back frame.

  According to this configuration, a gap is formed in the front-rear direction between the seat back frame and the back cover, and the leg pieces are disposed in the gap. Therefore, a space required for the deformation of the leg piece is ensured.

  In the above configuration, the connecting structure (110) is formed in the seat back frame by a through hole (100) that defines the leg piece portion (116) and the cover coupling portion (112). Good.

  According to this structure, it becomes possible to comprise the connection structure which reduces the load added to a back cover, without providing a member separately.

  In the above configuration, the leg piece portion may be less rigid than the back cover.

  According to this structure, a leg piece part deform | transforms with a load lower than a back cover deform | transforms. Therefore, when the seat back is bent at the time of the collision, the load generated at the joint portion between the back cover and the seat back frame is absorbed by the deformation of the leg piece portion, and the back cover is hardly deformed.

  According to the above configuration, it is possible to provide a vehicle seat in which the back cover is not easily deformed.

The perspective view of the vehicle seat which concerns on this invention 1 is an assembled perspective view of the vehicle seat of FIG. FIG. 2 is a front view of the seat back and a rear view of the vehicle seat when the back cover is removed Enlarged view of (A) IV-L and (B) IV-R in FIG. 2 is a perspective view of the IV-L portion of FIG. VI-VI sectional view of FIG. Explanatory drawing for demonstrating the load added between a back side frame and a back cover when a collision load is added Schematic of another embodiment of the connection part of the seat body and the back cover

  Embodiments of a vehicle seat according to the present invention will be described below with reference to FIGS. In the following description, the left and right sides and the inside and outside are determined based on the occupant seated on the vehicle seat. About the structure provided in right and left, a common number is attached | subjected, and when specifying left and right, the left or right character is attached | subjected to the name of a structure.

  As shown in FIG. 1, the vehicle seat S is a so-called full bucket seat, and includes a seat cushion S1, and a seat back S2 in which a backrest S3 and a headrest portion S4 are integrally formed. The seat cushion S1 includes a seat cushion frame, a pad and an outer skin that are placed on the upper side of the seat cushion frame, and supports the occupant's buttocks and thighs. The seat cushion frame is formed in a frame shape by a pair of left and right cushion side frames F2 extending in the front-rear direction and a plurality of frames that connect the side surfaces inside the cushion side frames F2. The seat back S2 is formed with a pair of left and right belt through holes S5 penetrating back and forth at a position substantially corresponding to the shoulder of the occupant.

  As shown in FIG. 2, the seat back S2 includes a seat back frame F3, a front cover C1 that covers the front side of the seat back frame F3, and a back cover C2 that is provided behind the seat back frame F3. . As shown in FIG. 2 and FIG. 3, the seat back frame F3 includes a pair of opposing left back side frame 1L and right back side frame 1R, and a back upper frame 3 connecting both the back side frames 1L and 1R, and A back lower frame 5 and a headrest frame 7 coupled to the back upper frame 3 are provided.

  Each of the backside frames 1L and 1R is formed so as to extend substantially vertically by a metal plate material, and has a U-shape facing inward in a horizontal sectional view. The back side frames 1L and 1R are rotatably coupled to the rear end portions of the cushion side frames F2 via the reclining mechanism R at the lower end portions. The reclining mechanism R selectively holds the tilt angle of each of the back side frames 1L, 1R with respect to the cushion side frame F2 at an arbitrary angle. The left back side frame 1L and the right back side frame 1R are spaced apart in the left-right direction and form the width of the seat back S2. A plate-like erection member 8 is provided between the left and right backside frames 1L, 1R. Predetermined elastic members 9 connecting the left and right backside frames 1L, 1R are spanned, and the erection member 8 is coupled to the left and right backside frames 1L, 1R via the elastic members 9. The erection member 8 can be displaced back and forth with respect to the back side frames 1L and 1R by the elastic member 9, and supports the back of the occupant with elastic force. In this embodiment, the erection member 8 is formed using a plate-like member, but is not limited to the plate-like member, and is a known configuration formed by a configuration that provides a lumbar support function (for example, a spring). It's okay.

  As shown in FIG. 3, connecting members 10 for connecting the back side frames 1L, 1R and the back cover C2 are provided on the rear walls of the lower ends of the left and right back side frames 1L, 1R, respectively. . As shown in FIGS. 4, 5, and 6, the connecting member 10 is formed of a bent metal plate and is coupled to the left and right backside frames 1 </ b> L and 1 </ b> R. As shown in FIG. 4, the left and right connecting members 10 are formed so as to be symmetrical. Below, the connection member 10 provided in the left backside frame 1L will be described with reference to FIG.

  As shown in FIG. 5, the connecting members 10 are arranged vertically apart from each other, and each of the two frame coupling portions 12 coupled to the backside frame 1L and the cover coupling portion disposed between the two frame coupling portions. 14 and two leg pieces 16 for connecting the frame coupling portion 12 and the cover coupling portion 14 respectively. The upper frame coupling portion 12U is formed in a plate shape along the rear side surface of the rear wall of the backside frame 1L. In the present embodiment, in accordance with the shape of the backside frame 1L, the upper frame coupling portion 12U has a substantially triangular shape when viewed from the front. The lower frame coupling portion 12D is also formed in a plate shape along the rear side surface of the rear wall of the back side frame 1L, and has a substantially square shape when viewed from the front. The left and right widths of the upper and lower frame coupling portions 12U and 12D are formed to be substantially equal. The cover coupling portion 14 is disposed between the upper and lower frame coupling portions 12U and 12D in a front view and spaced rearward from the wall surface of the back wall of the back side frame 1L. It is formed in a parallel plate shape. The cover coupling portion 14 has a substantially square shape when viewed from the front, and the width in the left-right direction is substantially equal to the width in the left-right direction of the upper and lower frame coupling portions 12U and 12D.

  A screw hole 18 penetrating in the front-rear direction is formed at a substantially central position in the vertical and horizontal directions of the cover coupling portion 14. Furthermore, a notch 20 that is recessed outward is provided at the left and right inner edges of the cover coupling portion.

  As shown in FIGS. 5 and 6, the upper leg piece portion 16U is formed in a plate shape extending substantially upward and rearward, and the proximal end is substantially the center in the left-right direction of the lower edge of the upper frame coupling portion 12U. The projecting end is coupled to the substantially central position in the left-right direction of the upper edge of the cover coupling portion 14. The lower leg piece portion 16D is formed in a plate shape extending substantially downward and rearward, the base end is coupled to the substantially central position in the left-right direction of the lower edge of the cover coupling portion 14, and the protruding end is coupled to the lower frame. The upper edge of the portion 12D is coupled to a substantially central position in the left-right direction. The widths of the upper and lower leg pieces 16U, 16D in the left-right direction (the direction perpendicular to the extending direction of the leg pieces 16U) are both larger than the widths of the frame connecting parts 12U, 12D and the cover connecting part 14 in the left-right direction. The leg pieces 16U and 16D are set to have a width in the left-right direction so that the rigidity of the leg pieces 16U and 16D is smaller than the rigidity of the back cover C2.

  After the connecting member 10 is positioned with respect to the back side frame 1L using a positioning member that fits into the screw hole 18 and the cutout portion 20, the upper edge of the upper frame coupling portion 12U and the lower frame coupling portion 12D. The lower edge is welded to the backside frame 1L. In FIGS. 4A and 4B, a portion to be welded in the present embodiment is shown in black.

  The back upper frame 3 is formed by a U-shaped metal pipe-shaped member facing downward when viewed from the front. Both end portions of the back upper frame 3 are overlapped with the upper portions of the inner side surfaces of the corresponding back side frames 1L and 1R and joined by welding or the like, and the back upper frame 3 connects the upper end portions of both the back side frames 1L and 1R. doing. The back lower frame 5 is also formed of a metal pipe-like member, and extends in the left-right direction between the lower portions of both the back side frames 1L, 1R. The left and right ends of the back lower frame 5 are within the back side frames 1L, 1R. It is connected to the side by welding or the like. Further, sub-frames 6 are provided on the left and right ends of the upper portion of the back upper frame 3 to form portions that contact the shoulders of the occupants of the seat back S2.

  Wire-like sub-side frames 30LU and 30RU for connecting the back upper frame 3 and the left and right back side frames 1L and 1R are provided inside the left and right back side frames 1L and 1R and outside the installation member 8 in the left and right direction. It has been. Frame-side locking portions 32 that are paired on the left and right are provided at predetermined positions of the sub-side frames 30LU and 30RU. In the present embodiment, the frame side locking portion 32 is formed as a wire extending in the vertical direction. Further, below the left and right sub-side frames 30LU and 30RU, there are provided sub-side frames 30LD and 30RD which are formed in the shape of a wire having an annular shape and whose both ends are coupled to the left back-side frames 1L and 1R. Similarly, the frame side latching portions 32 are formed in the sub-side frames 30LD and 30RD. All the frame side locking portions 32 are arranged at a predetermined height above the connecting member 10.

  The front cover C1 includes a pad member 36 that is a buffer material that joins the seat back frame F3 from the front, and a skin material 37 that covers the front side of the pad member 36. A through hole 39 penetrating back and forth is formed at a position corresponding to the belt through hole S5 of the pad member 36. Similarly to the pad member 36, an opening is formed in the skin material 37 at a position corresponding to the belt through hole S5. A resin garnish 40 extending substantially in the rear is fitted in the opening of the skin material and the through hole 39 of the pad member 36. A plurality of locking claws (not shown) projecting in the inner circumferential direction are formed on the outer periphery of the rear end of the garnish 40.

  The headrest frame 7 includes a first support portion 50 coupled to the upper back surface of the back upper frame 3, and a second support portion 52 and a third support portion 54 coupled to the upper front side of the first support portion 50. The first support part 50 is formed by an inverted U-shaped metal pipe member facing downward in a front view, and its lower part is formed in a pair on the left and right and extending vertically. The first support portion 50 is coupled to the upper front surface of the back upper frame 3 at the lower end thereof. The first support portion 50 forms the shape of the headrest portion S4 and also functions as a headrest pillar. Similarly to the first support portion 50, the second support portion 52 is also formed by a metal pipe member. Both ends of the second support portion 52 are respectively coupled to a substantially central portion in the vertical direction of the first support portion 50 that forms a pair on the left and right and extends vertically. The second support portion 52 is formed in an inverted U shape when viewed from the front, extends forward from the first support portion 50 when viewed from the side, and then bends and extends upward. The third support portion 54 is also formed so that both ends thereof are coupled to the substantially central portion in the vertical direction of the first support portion 50, have an inverted U shape in front view, bend in side view, and protrude forward. ing. The first support portion 50, the second support portion 52, and the third support portion 54 form a skeleton of the headrest portion S4.

  As shown in FIG. 2, the back cover C2 is a resin-made plate-like member disposed along the back surface of the seat back S2, and is formed symmetrically. The back cover C <b> 2 includes a base portion 60 having a substantially square shape, and a head portion 61 that extends upward from the upper edge portion of the base portion 60 continuously to the base portion 60. When the back cover C2 is coupled to the back surface of the seat back S2, the base 60 is disposed so as to cover the backrest portion of the vehicle seat S and the head 61 covers the headrest portion S4 of the vehicle seat S. A pair of left and right through holes 62 are formed in the upper portion of the base portion 60 at positions corresponding to the belt through holes S5, and a cylindrical connecting portion 63 extends forward from the edge portion. A plurality of engagement holes, which are through-holes arranged so as to be aligned along the front end edge, are formed at the front end of the connection portion 63. The engagement hole is disposed at a position where it engages with the locking claw of the garnish 40. Two pairs of cover-side locking portions 68 that form a pair on the left and right sides of the back cover C2 are provided at the upper portion of the back cover C2 and at the substantially central portion in the vertical direction.

  A through hole 72 penetrating the back cover C2 back and forth is provided at a position below the base 60 of the back cover C2 and below the cover side locking portion 68 and corresponding to the screw hole 18 of the connecting member 10. ing. In this embodiment, in order to improve the designability, the through hole 72 is subjected to countersink processing for accommodating the head of the screw.

  Next, an assembling method of the seat back S2 of the vehicle seat S will be described. As shown in FIG. 2, the back cover C2 is joined by engaging the cover side locking portion 68 and the frame side locking portion 32 with the seat back frame F3. Further, the locking claw of the garnish 40 is fitted into the engagement hole of the back cover C2, and the front cover C1 and the back cover C2 are fixed to the seat back frame F3. Further, the lower part of the back cover C2 is fixed to the seat back frame F3 by passing a screw through the through hole 62 of the back cover C2 and coupling it to the screw hole 18 provided in the connecting member 10. Therefore, the connecting member 10 constitutes a connecting structure for connecting the back cover C2 and the seat back frame F3. As a result, the front cover C1 and the back cover C2 are joined to the seat back frame F3, and the seat back S2 is completed.

  Next, the effect of the vehicle seat S will be described. When an impact from the rear is applied to the vehicle body, an inertial force toward the rear is applied to the occupant, and a rearward load is applied to the upper portion of the seat back S2.

  The upper part of the seat back S2 moves rearward due to the rearward load. Therefore, the vehicle seat S may be bent so as to warp forward (for example, FIG. 7). Due to this bending, as shown by the black arrows in FIG. 7, a load directed rearward and upward is applied to the backside frames 1L and 1R, and a load directed forward and downward is applied to the back cover C2. With these loads, a shear load is applied to the connecting member 10 that joins the back side frames 1L, 1R and the back cover C2.

  As shown in FIG. 3, the leg pieces 16U and 16D have a smaller width in the left-right direction than the cover coupling portion 14 and the frame coupling portions 12U and 12D, and are smaller than the cover coupling portion 14 and the frame coupling portions 12U and 12D. Low rigidity. Therefore, the leg pieces 16U and 16D are more easily deformed than the cover coupling portion 14 with respect to the load generated at the coupling portion between the back cover C2 and the back side frames 1L and 1R. The load generated in the coupling portion is easily absorbed by the leg pieces 16U and 16D, and the portion where the back cover C2 and the cover coupling portion 14 are coupled is not easily deformed, so that the back cover C2 is protected. Furthermore, the width of the leg pieces 16U, 16D in the left-right direction is such that the rigidity of the leg pieces 16U, 16D is smaller than that of the back cover C2, and the rigidity of the cover coupling portion 14 and the frame coupling portions 12U, 12D is greater than that of the back cover C2. It is set to be large. Therefore, when a shear load is applied, the connecting member 10 is deformed and the load is absorbed, so that the back cover C2 is difficult to deform.

Further, when the upper portion of the seat back S2 moves rearward, as shown by the white arrow in FIG. 7, a load that pushes the lower end of the back cover C2 forward may be applied. The cover coupling portion 14 is pushed forward by the load toward the front. Since the end portions of the leg piece portions 16U and 16D on the cover connecting portion side are located behind the end portions on the frame connecting portion 12U and 12D side, there is a gap between the seat back frame F3 and the back cover C2. Is formed.
Therefore, when the load which pushes the cover coupling | bond part 14 ahead is added, the leg piece parts 16U and 16D can deform | transform. Thus, since the gap is formed between the seat back frame F3 and the back cover C2, a space in which the leg pieces 16U and 16D can be deformed is secured. Due to the deformation of the leg pieces 16U and 16D, the load applied to the back cover C2 is reduced, and the back cover C2 becomes difficult to deform. Further, since a gap is formed between the seat back frame F3 and the back cover C2, the screw can be turned until it protrudes into the gap. Therefore, it is not necessary to strictly determine the length of the screw, and the back cover C2 can be easily coupled to the seat back frame F3.

  The back cover C2 is provided with a cover side locking portion 68, and the back cover C2 is coupled to the frame side locking portion 32 on one end side (upper side) in the vertical direction. The connecting member 10 is provided at the other end (lower end) in the vertical direction of the back cover C2, and the back cover C2 is coupled to the frame side locking portion 32 at the lower end. Since the frame side locking portion 32 and the back cover C2 are arranged at different heights, the back cover C2 having a shape extending in the vertical direction can be reliably coupled to the seat back frame F3. Further, since the connecting member 10 is provided at the lower end of the back cover C2, the cover-side locking portion 68 can be locked to the frame-side locking portion 32 and then screwed, and the seat back frame F3 can be secured. And the back cover C2 can be easily assembled.

  By the connecting member 10, the seat back frame F3 and the back cover C2 can be easily coupled. Since the connecting member 10 and the seat back frame F3 are connected via the two frame coupling portions 12U and 12D, the coupling between the seat back frame F3 and the back cover C2 is strengthened.

  Although the description of the specific embodiment is finished as described above, the present invention is not limited to the above embodiment and can be widely modified. In order to make the leg piece 16 a fragile part that is easily deformed when a load is applied, the width in the left-right direction of the leg piece 16 is set to be smaller than the frame coupling part 12 and the cover coupling part 14. However, any configuration may be used as long as the rigidity of the leg piece portion 16 is lower than that of the back cover C2. For example, the leg piece 16 may have a lower rigidity than the back cover C2 by reducing the width (thickness) of the leg piece 16 in the front-rear direction. Only a part of the leg piece 16 may be provided with a portion having a small width in the left-right direction to reduce the rigidity of the leg piece 16.

  For example, as shown in FIG. 8A, only the width in the left-right direction of the upper leg piece portion 16U is made smaller than the width of the cover coupling portion 14 and the width of the frame coupling portions 12U and 12D. May be. Also with this configuration, the connecting member 10 functions as a fragile portion that deforms when the above-described load is applied, and the back cover C2 is less likely to be deformed. Further, the frame coupling portion 12 may be arranged on the top and bottom and the left (or right) with respect to the cover coupling portion 14, and each frame coupling portion 12 may be coupled to the cover coupling portion 14 via the leg piece portion 16. . At this time, the width in the left-right direction of the leg piece portion 16 extending in the vertical direction is set to be smaller than the width of the frame coupling portion 12 and the cover coupling portion 14, and the vertical direction of the leg piece portion 16 extending in the left-right direction. Is preferably set to be smaller than the width of the frame coupling portion 12 and the cover coupling portion 14.

  As shown in FIG. 8B, the connecting member 10 shown in FIG. It may be done. At this time, the leg piece 16 connects the right edge of the left frame coupling portion 12 and the left edge of the cover coupling portion 14 to the left edge of the right frame coupling portion 12 and the right edge of the cover coupling portion 14. Yes. The vertical width of the leg piece 16 may be set smaller than the width of the frame coupling part 12 and the cover coupling part 14. Even in this case, when a load toward the front is applied to the cover coupling portion 14, the leg piece portion 16 is deformed and the load applied to the back cover C2 is reduced, so that the back cover C2 is hardly deformed.

  Further, similarly to the above embodiment, since the cover coupling portion 14 is located behind the frame coupling portion 12, a gap between the seat back frame F3 and the back cover C2 can be reliably provided, and the connecting member 10 Space required for deformation is secured. Moreover, since the connection member 10 and the seat back frame F3 are connected at two places as in the above-described embodiment, the coupling between the seat back frame F3 and the back cover C2 becomes strong.

  As shown in FIG. 8C, a connecting structure 110 that connects the back cover C2 and the back side frames 1L, 1R is provided by providing through holes 100 penetrating the back side frames 1L, 1R in the front-rear direction. It may be configured. The connection structure 110 shown in FIG. 8C includes a pair of through-holes 100 that are symmetrically formed on the rear walls of the back side frames 1L and 1R and that are substantially U-shaped and face each other. A pair of cover coupling portions 112 having a substantially rectangular shape defined by the through-holes 100, and upper and lower ends of the cover coupling portion 112 and a frame main body 114 serving as a main body of the back side frames 1L and 1R, respectively. Leg piece 116. A screw hole 118 penetrating in the front-rear direction is provided at a substantially central position in the left-right and vertical directions of the cover coupling portion 112. The back cover C2 is screwed to the cover coupling portion 112 through a through-hole 62 provided in the lower portion, and is fixed to the back side frames 1L and 1R.

  In the connection structure 110 shown in FIG. 8C, the cover coupling portion 112 is surrounded by a pair of through holes 100, and the frames of the back side frames 1L and 1R via leg pieces 116 provided on the upper and lower sides, respectively. It is connected to the main body 114. Therefore, when a forward load is applied to the cover coupling portion 112, the leg piece portion 116 is deformed, and the load applied to the back cover C2 is reduced, so that the effect that the back cover C2 becomes difficult to deform is obtained. Further, the connection structure 110 has an advantage that the leg piece portion 116 that can reduce the load applied to the back cover can be provided without providing the connection member 10 separately.

S: Vehicle seat S2: Seat back F3: Seat back frame 10: Connection member (connection structure)
12 (12U, 12D): Frame coupling part 14: Cover coupling part 16 (16U, 16D): Leg piece part 110: Connection structure 112: Cover coupling part 116: Leg piece part

Claims (9)

A vehicle seat having a seat back that supports the back of the occupant,
The seat back includes a seat back frame serving as a skeleton, a back cover coupled to a back surface of the seat back frame, and a connection structure disposed between the back cover and the seat back.
The connection structure includes a leg piece portion extending from the seat back frame, and a cover coupling portion provided at a protruding end of the leg piece portion and coupled to the back cover,
The vehicle seat according to claim 1, wherein the leg piece portion has a rigidity smaller than that of the cover coupling portion.   The vehicle seat according to claim 1, wherein a width of the leg piece portion in a direction orthogonal to a direction in which the leg piece portion extends is smaller than that of the cover coupling portion. The back cover extends vertically.
One end in the vertical direction of the back cover is coupled to the seat back frame,
The vehicle seat according to claim 1 or 2, wherein the other end of the back cover is coupled to the seat back frame by the connection structure. The connecting structure is constituted by a connecting member having the leg piece portion, the cover connecting portion, and a frame connecting portion provided at a base end of the leg piece portion and connected to the seat back frame,
The vehicle seat according to any one of claims 1 to 3, wherein the cover coupling portion and the frame coupling portion are arranged vertically.   5. The vehicle seat according to claim 4, wherein a width in the left-right direction of the leg piece portion is smaller than a width in the left-right direction of the cover coupling portion and the frame coupling portion.   The vehicle seat according to claim 4 or 5, wherein the connecting member connects the seat back frame and a lower end of the back cover.   The vehicle seat according to any one of claims 1 to 6, wherein the cover coupling portion is disposed apart from the seat back frame.   The said connection structure is formed in the said seat back frame by the through-hole which defines the said leg piece part and the said cover coupling | bond part, The claim 1 characterized by the above-mentioned. The vehicle seat described.   The vehicle seat according to any one of claims 1 to 8, wherein the leg piece portion is less rigid than the back cover.

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