JP2018144756A - Vehicular seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicular seat comprising a back cover which allows a load for deforming a locking claw to be easily applied in a deformation direction to the claw and can be easily assembled.SOLUTION: A vehicular seat S has a seat back frame F3, and a back cover C2 provided behind the seat back frame. The back cover has a plate-shaped main body 60, a left-side locking part 65L and a right-side locking part 65R. The seat back frame extends vertically and includes a rod-like member 32 to which the locking parts are locked. The left-side locking part includes: a locking claw 67 which has a protruding piece 73 which protrudes forward from the main body and passes through a right side when viewed from a back side of the rod-like member and a claw part 75 comprising a checking surface 77 which protrudes to the left from the protruding piece and contacts the rod-like member to oppose to the main body; and a screen 69 which protrudes forward from the main body, passes through a left side when viewed from the back side of the rod-like member and opposes to the locking claw through a gap. The right-side locking part has a laterally and reflectionally symmetrical shape with respect to the left-side locking part.SELECTED DRAWING: Figure 4

Description

  The present invention relates to a vehicle seat mounted on an automobile or the like, and more particularly to a vehicle seat having a back cover attached to the back surface.

  There is a vehicle seat in which a back cover is attached to the back surface of a seat back frame (for example, Patent Document 1 or Patent Document 2). In the vehicle seat described in Patent Document 1, hooks are provided in left and right pairs at the upper front end of the back cover. In addition, a pair of upper and lower locking claws that project in a plate shape are provided at the left and right ends of the lower surface of the back cover. Each locking claw includes a claw portion that protrudes upward and downward. The seat back frame is provided with a wire on which a hook is hooked and a hole with which a claw portion of a locking claw is engaged.

  In the vehicle seat described in Patent Document 2, a wire is provided on a pad disposed on the front side of the seat back, and the back cover includes a pair of locking claws that engage with the wire. Claw portions protruding in opposite directions are provided at the protruding ends of the locking claws. When the wire is inserted between the claw portions and pushed perpendicularly to the main body, the locking claws are bent in the direction in which the claw portions are separated from each other, and the wires are fitted between the locking claws.

Japanese Patent Laying-Open No. 2015-74276 JP 2003-189975 A

  In the vehicle seat described in Patent Documents 1 and 2, the two locking claws are both elastically deformed when assembled and then restored, whereby the back cover is locked to the seat back frame. However, when a load is applied after assembly, the two locking claws are elastically deformed, and there is a problem that the back cover tends to wobble with respect to the seat back frame.

  In view of the above background, it is an object of the present invention to provide a vehicle seat that is easy to assemble and has a back cover that is less likely to wobble with respect to the seat back frame after assembly.

  In order to solve the above problems, a vehicle seat (S) having a seat back frame (F2) forming a skeleton of the seat back (S2) and a back cover (C2) provided at a rear portion of the seat back frame. The back cover includes a plate-shaped main body (60), a pair of left side locking portions and right side locking portions (65RU, 65LU, 65RD, 65LD) coupled to the main body, and the seat. The back frame extends vertically and includes a rod-like member (32) on which the latching portion is hooked, and the left-side latching portion projects forward from the main body and passes through the right side in a rear view of the rod-like member. And a locking claw (67) having a claw portion (75) provided with a check surface (77) that protrudes to the left from the protruding piece and faces the main body and abuts against the rod-shaped member. ) And protruding forward from the body And a partition (69) that passes through the left side of the rod-like member in a rear view and faces the locking claw with a gap therebetween, and the right locking portion is arranged in a lateral direction with respect to the left locking portion. It is good to make a mirror-symmetric shape.

  According to this configuration, the locking portion includes the locking claw and the partition, and when assembled, the locking claw is elastically deformed so as to bend away from the partition. Due to the deformation, the bar-shaped member moves to a position where it comes into contact with the non-return surface, the locking claw is hooked on the bar-shaped member, and the back cover is coupled to the seat back frame. After assembly, since the rod-shaped member is sandwiched between partitions formed symmetrically, the movement of the rod-shaped member in the left-right direction is restricted, and the back cover is less likely to wobble with respect to the load in the left-right direction. Moreover, since it is not necessary to bend a partition at the time of an assembly | attachment, it can give high rigidity to a partition. By increasing the rigidity of the screen, it is possible to further suppress the wobbling of the back cover.

  In addition, in the above configuration, the claw portion further includes a first inclined surface (79) inclined toward the main body side toward the partition side, and the partition has a protruding end toward the locking claw side toward the main body side. And the first edge (81) which is the edge of the first slope on the partition side is the edge of the second slope on the locking claw side. It is good to be located in the side farther from the main body than the second edge (91), and the distance between the first edge and the second edge is smaller than the width of the rod-shaped member.

  According to this configuration, the rod-shaped member is guided to a position where it comes into contact with the check surface by the second inclined surface. Therefore, it becomes easy to assemble the back cover. Moreover, since the 2nd slope inclines to the main body side, the bending | flexion calculated | required by a latching claw becomes small, the rigidity of a latching claw can be improved, and a back cover can be made harder to wobble.

  In the above configuration, the locking portion includes a protruding wall (71) that protrudes from the main body between the locking claw and the partition and restricts the movement of the rod-shaped member toward the main body. Good.

  According to this configuration, since the forward movement of the back cover with respect to the seat back frame is restricted by the protruding wall, the back cover is less likely to wobble in the front-rear direction with respect to the seat back frame.

  In the above configuration, the cross section of the protruding wall may be substantially + -shaped.

  According to this configuration, the rigidity of the protruding wall is increased, and the back cover is less likely to wobble.

  In the above configuration, the back cover includes a hook portion (64) that is hooked to the seat back frame at an upper end, and a fastening portion (10) that is fastened to the seat back frame at a lower end. Is preferably disposed between the hooking portion and the fastening portion.

  According to this configuration, the back cover and the seat back frame are more firmly coupled. Further, since the latching claw and the screen are coupled to the bar-like member so as to be vertically displaceable, the back cover is not easily deformed even when the seat back frame is deformed to bend backward.

  In the above-described configuration, the rod-shaped member may be paired on the left and right sides with respect to the seat back frame, and may be spaced apart on the left and right.

  According to this configuration, since the rod-like members are disposed apart from each other in the left and right directions, the coupling between the back cover and the seat back frame becomes strong, and the back cover is less likely to wobble with respect to the load in the left and right direction.

  Moreover, said structure WHEREIN: The said protrusion piece is good to include the part whose cross-sectional area is smaller than another part in a base end.

  According to this configuration, the locking claw is easily elastically deformed.

  Further, in the above configuration, it is preferable that a lightening portion (83) is formed on a side surface of the locking claw on the side away from the partition.

  According to this configuration, the locking claw is more easily elastically deformed, and the back cover is lighter.

  In the above configuration, the back support member (8) that supports the back of the occupant provided on the seat back frame, the hook (99) that projects from the front surface of the main body, and the hook are hooked on the hook. And a cushion member (95) arranged corresponding to the back support member.

  According to this configuration, the back cover is protected from a collision from the back support member by the cushion member.

  According to the above configuration, it is possible to provide a vehicle seat including a back cover that is less likely to wobble after assembly.

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. 1 is a front view of the seat back and a rear view of the vehicle seat when the back cover is removed. The perspective view of the latching | locking part provided in the upper right end of the back cover Sectional view of (A) upper right end and (B) upper left end of the back cover. VI-VI sectional view of FIG. Sectional view of the locking portion and the rod-shaped member when the rod-shaped member is pushed into the locking portion (A) and (B) when being pushed. Perspective view of cushion member and hook

  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 vents S5 penetrating back and forth at a position corresponding substantially to the shoulder of the occupant.

  As shown in FIG. 2, the seat back S2 includes a seat back frame F3, a pad unit C1 provided on the front side of the seat back frame F3, and a back cover C2 provided on the rear portion of 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 back support member 8 is provided between the left and right backside frames 1L, 1R. A predetermined elastic member 9 that connects the left and right backside frames 1L and 1R is stretched over the backside frames 1L and 1R, and the back support member 8 is coupled to the left and right backside frames 1L and 1R via the elastic members 9. The back support 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 the present embodiment, the back support 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 or the like). It may be.

  As shown in FIG. 3, fastening portions 10 for connecting the back side frames 1L, 1R and the back cover C2 are provided on the rear walls of the lower end portions of the left and right back side frames 1L, 1R. The fastening portion 10 is formed of a bent metal plate and is coupled to the left and right back side frames 1L and 1R. The left and right fastening portions 10 are formed so as to be symmetrical, and a screw hole is formed in the rear wall.

  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.

  The seat back frame F3 is provided inside the left and right back side frames 1L and 1R and on the left and right outer sides of the back support member 8, and connects the back upper frame 3 and the left and right back side frames 1L and 1R, respectively. Members 32LU and 32RU are included. The rod-like members 32LU and 32RU are made of metal and formed by a pipe member having an annular cross section, and are arranged apart from each other on the left and right. Further, both ends of the rod-like members 32LU and 32RU are welded to the back upper frame 3 and the back side frames 1L and 1R, respectively. Each of the rod-shaped members 32LU and 32RU includes a portion formed so as to extend linearly in the vertical direction at a predetermined height. The seat back frame F3 further includes metal rod-like members 32LD and 32RD which are respectively formed annularly below the rod-like members 32LD and 32RD and whose both ends are coupled to the left back-side frames 1L and 1R. Yes. These rod-shaped members 32LD and 32RD are also formed by pipe members and are arranged apart from each other on the left and right. Each of the rod-shaped members 32LD and 32RD includes a portion formed so as to extend linearly in the vertical direction at a predetermined height. All the rod-shaped members 32 (32LU, 32RU, 32LD, 32RD) are arranged at a predetermined height above the fastening portion 10.

  The pad unit C1 is a cushioning material, and includes a pad member 36 provided on the front side of the seat back frame F3, and a skin material 37 that covers the pad member 36. The pad member 36 is supported from the rear by the seat back frame F <b> 3, and the skin material 37 covers substantially the front side of the pad member 36. A through hole 39 penetrating back and forth is formed at a position corresponding to the vent 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 vent 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 headrest frame 50 coupled to the upper back surface of the back upper frame 3, and a second headrest frame 52 and a third headrest frame 54 coupled to the upper front side of the first headrest frame 50. The first headrest frame 50 is formed by an inverted U-shaped metal pipe member facing downward when viewed from the front, and is coupled to the upper front surface of the back upper frame 3 at the lower end thereof. Similarly to the first headrest frame 50, the second headrest frame 52 and the third headrest frame are each formed of a metal pipe member, have an inverted U shape in front view, and from the first headrest frame 50 in side view. It is formed to extend forward. The first headrest frame 50, the second headrest frame 52, and the third headrest frame 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 C2 includes a plate-like plate portion 60 extending vertically and a plate-like head portion 61 that is bent forward from the upper edge portion of the plate portion 60 and extends upward and forward. When the back cover C2 is joined to the back surface of the seat back S2, the plate portion 60 covers 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 plate portion 60 at a position corresponding to the vent 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. At the upper end of the head 61, a hook portion 64 that is hooked on the upper end of the first headrest frame 50 is formed. In the present embodiment, the hook portion 64 is formed in a plate shape that protrudes downward from the upper end of the head 61.

  The back cover C2 includes locking portions 65RU, 65LU, 65RD, and 65LD at the upper right end, the upper left end, and the right end and the left end of the substantially central portion in the vertical direction, respectively. As shown in FIGS. 2 and 3, the locking portions 65RU, 65LU, 65RD, and 65LD are formed symmetrically with each other vertically and horizontally. That is, the upper right end locking portion 65RU has a mirror-symmetric shape in the left-right direction with respect to the upper left end locking portion 65LU, and the substantially central right end locking portion 65RD is substantially the left end of the central portion. It has a mirror-symmetric shape in the left-right direction with respect to the locking portion 65LD. Further, the upper right end locking portion 65RU and the upper left end locking portion 65LU are mirror-symmetric in the vertical direction with respect to the locking portion 65RD at the substantially central right end and the locking portion 65LD at the substantially central left end, respectively. Is formed. Hereinafter, the upper left end locking portion 65LU and the substantially central left end locking portion 65LD will be referred to as the left locking portion 65L, and the upper right end locking portion 65RU and the substantially central right end as required. The locking portion 65RD is referred to as a right locking portion 65R.

  The locking portions 65 (65RU, 65LU, 65RD, and 65LD) are positioned on the left and right outer sides of the back cover C2 with respect to the locking claws 67 protruding from the plate portion 60 toward the front and the locking claws 67, respectively. Further, a partition 69 opposed to each other with a gap, and a projecting wall 71 projecting forward from the plate portion 60 between the locking claw 67 and the partition 69 are provided. Below, with reference to FIG. 4, FIG. 5 (A) and FIG. 6, the latching | locking part 65LU located in an upper left end is demonstrated in detail.

  As shown in FIG. 4, the locking claw 67 includes a first protruding piece 73 protruding forward from the plate portion 60 and a claw portion 75 protruding leftward (left and right outward) from the protruding end of the first protruding piece 73. Have. The first protrusion 73 has a substantially quadrangular prism shape having a main surface in the left-right direction. The claw portion 75 opposes the plate portion 60 on the rear side, a check surface 77 facing rearward substantially parallel to the plate portion 60, and a first slope inclined toward the plate portion 60 side toward the partition 69 on the front side. 79. A first edge 81 extending linearly in the vertical direction is formed on the plate portion 60 side of the first slope 79, and the first slope 79 and the check surface 77 are connected via the first edge 81. Yes.

  As shown in FIGS. 4 and 6, the rear end (base end) of the locking claw 67 on the right side (the side away from the partition 69) is on the left side (the side closer to the partition 69, the left and right outwards). ) Is formed so as to be recessed toward (). In the present embodiment, two locking portions 83 are formed in the locking claw 67, and the right wall of the locking claw 67 has three rib shapes.

  As shown in FIG. 5A, a concave portion 85 that is recessed rightward is formed at the rear end of the left side surface (the surface near the partition 69) of the locking claw 67. Therefore, the cross-sectional area of the rear end side of the first projecting piece 73 is smaller than the cross-sectional area of the center part of the first projecting piece 73 in the front-rear direction.

  The partition 69 has a second projecting piece 87 projecting forward from the plate portion 60 on the left side of the locking claw 67 and a second inclined surface 89 inclined rearward toward the right side at the front end of the second projecting piece 87. doing. The second edge 91 at the right end of the second slope 89 is located behind the first edge 81, and the distance between the first edge 81 and the second edge 91 is perpendicular to the extending direction of the rod-shaped member 32. It is set to be smaller than the diameter, which is the width in any direction. Therefore, the distance between the first edge 81 and the second slope 89 is smaller than the diameter of the rod-shaped member 32.

  As shown in FIGS. 4 and 6, the left side surface of the screen 69 (the surface on the side away from the locking claw 67) is also formed with a hollow portion 93 that is recessed toward the right. In the present embodiment, the screen 69 is formed with two thinned portions 93, and the left side surface of the screen 69 also has three rib shapes.

  As shown in FIG. 6, the protruding wall 71 includes a first protruding wall 71 </ b> A that protrudes forward in a plate shape having a main surface on the left and right from the plate portion 60 between the first protruding piece 73 and the second protruding piece 87. The second protrusion wall 71B is orthogonal to the first protrusion wall 71A and protrudes forward from the plate portion 60 in a plate shape. The projecting wall 71 has a substantially + -shaped cross section by the first projecting wall 71A and the second projecting wall 71B. The first projecting wall 71 </ b> A has a rib shape extending from between the first projecting piece 73 and the partition 69 to the upper side of the upper end thereof in the plate portion 60. The second projecting wall 71B has a rib shape that intersects at a substantially central position in the vertical direction of the first projecting wall 71A in the plate portion 60 and extends to the left and right. In the present embodiment, the second projecting wall 71B is connected to the second projecting piece 87, and the upper surface of the second projecting wall 71B and the upper surface of the second projecting piece 87 are continuous. As shown in FIG. 5B, the front end of the protruding wall 71 is located rearward from the check surface 77 through a distance equal to or larger than the diameter of the rod-shaped member 32.

  As shown in FIG. 2, the four locking portions 65 (65RU, 65LU, 65RD, and 65LD) are symmetrical vertically and horizontally. In the left side locking portion 65L, the partition 69 is formed on the left side of the locking claw 67, and in the right side locking portion 65R, the partition 69 is formed on the right side of the locking claw 67, and they are mirror-symmetric with each other in the left-right direction. Yes.

  In the locking portions 65RU and 65LU provided at the upper right end and the upper left end of the back cover C2, the protruding walls 71 extend above the locking claws 67 and the partitions 69, respectively. In the locking portions 65RD and 65LD provided at the lower right end and the lower left end of the back cover C2, the protruding walls 71 extend below the locking claws 67 and the partitions 69, respectively.

  A cushion member 95 extending in a rectangular shape on the left and right is provided at a position on the rear side of the back support member 8 that is substantially the center of the plate portion 60. As shown in FIG. 8, cushion through holes 97 having a predetermined size are formed at the four corners of the cushion member 95. The plate portion 60 is provided with four hooks 99 for hooking the cushion member 95 at positions corresponding to the cushion through holes 97. The hook 99 has an inverted L shape in a side view, and includes a base portion 100 in which the plate portion 60 protrudes substantially perpendicularly to the plate portion 60 and a protrusion portion 101 that protrudes along the plate portion 60 from the protruding end of the base portion 100. . The hook 99 passes through the cushion through hole 97 and restricts the movement of the protruding portion 101 in the direction away from the plate portion 60 of the cushion member 95.

  A through hole 105 penetrating the back cover C2 in the front-rear direction is provided at a position corresponding to a screw hole formed in the fastening portion 10 at the lower end of the plate portion 60 of the back cover C2 and below the locking portion 65. It has been.

  Next, an assembling method of the seat back S2 of the vehicle seat S will be described. By hooking the hook portion 64 on the seat back frame F3, the upper end of the back cover C2 is joined to the upper end of the seat back frame F3. Further, the back cover C <b> 2 is disposed so as to be along the back surface of the seat back frame F <b> 3 and so that the four locking portions 65 are respectively located on the rear side of the rod-shaped member 32. At this time, as shown in FIG. 7A, the rod-shaped member 32 is located between the locking claw 67 and the partition 69 and on the front side of the first slope 79 and the second slope 89. At this time, since the distance between the first edge portion 81 and the second edge portion 91 is narrower than the diameter of the rod-shaped member 32, the rod-shaped member 32 contacts the first inclined surface 79 and the second inclined surface 89 before the load is applied. It touches.

  Thereafter, the operator presses the back cover C2 against the seat back frame F3, and applies a load toward the front to the back cover C2. FIG. 7B shows a cross-sectional view of the rod-shaped member 32 and the upper left end locking portion 65LU when a load is applied to the back cover C2. Due to the load applied to the back cover C <b> 2, a load is applied from the first inclined surface 79 to the rod-shaped member 32, and the first inclined surface 79 receives a reaction force from the rod-shaped member 32. Therefore, a force is applied to the locking claw 67 in a direction away from the partition 69, and the locking claw 67 is elastically deformed so as to bend in a direction away from the partition 69.

  Due to the elastic deformation of the locking claw 67, the first edge 81 and the second inclined surface 89 are separated, and a gap is generated between the first edge 81 and the second inclined surface 89 rather than the width of the rod-shaped member 32. Therefore, the rod-shaped member 32 passes between the first edge portion 81 and the second inclined surface 89, and the rod-shaped member 32 is sandwiched between the check surface 77 and the second inclined surface 89. Further, the bar-shaped member 32 advances toward the back cover C2 along the second inclined surface 89 and is separated from the second inclined surface 89 and enters between the first projecting piece 73 and the partition 69. When the rod-shaped member 32 moves away from the second inclined surface 89, the load applied to the latching claw 67 from the rod-shaped member 32 disappears, so that the latching claw 67 is elastically restored from the deformed state and returns to the original state. Therefore, as shown in FIG. 5A, the distance between the first edge 81 and the second slope 89 is smaller than the diameter of the rod-shaped member 32. For this reason, the rod-shaped member 32LU cannot be detached from the locking portion 65LU, and the locking portion 65LU is hooked on the rod-shaped member 32LU.

  FIG. 5A shows a cross-sectional view of the locking portion 65LU provided at the upper left end of the plate portion 60 at this time. The first projecting piece 73 projects forward from the plate portion 60 and passes the right side of the rod-shaped member 32LU in rear view, and the claw portion 75 projects leftward from the projecting end of the first projecting piece 73. The check surface 77 is in contact with the front surface of the rod-shaped member 32 and restricts its forward movement. The partition 69 protrudes forward from the plate portion 60 and passes through the left side of the rod-shaped member 32LU, and faces the left side of the locking claw 67 with a gap. The partition 69 restricts the leftward movement of the rod-shaped member 32LU. Further, the protruding wall 71 is located behind the rod-like member 32LU, and restricts the movement of the rod-like member 32LU to the rear.

  FIG. 5B shows a cross-sectional view of the locking portion 65RU provided at the upper right end of the plate portion 60 at this time. In the locking portion 65RU provided at the upper right end, the first protruding piece 73 protrudes forward from the plate portion 60 and passes the left side of the rod-shaped member 32RU in the rear view, and the claw portion 75 extends from the protruding end of the first protruding piece 73. It protrudes to the right. The check surface 77 is in contact with the front surface of the rod-shaped member 32RU and restricts its forward movement. The partition 69 protrudes forward from the plate portion 60 and passes the right side of the rod-shaped member 32RU, and faces the right side of the locking claw 67 with a gap. That is, the locking portion 65RU provided at the upper right end is formed so as to be mirror symmetric in the left-right direction with respect to the locking portion 65LU provided at the upper left end. The partition 69 restricts the rightward movement of the rod-shaped member 32RU. Further, the protruding wall 71 is located behind the rod-like member 32RU, and restricts the movement of the rod-like member 32RU to the rear.

  Further, a screw is passed through the through hole 62 of the back cover C2, and the screw is fastened to a screw hole provided in the fastening portion 10, whereby the lower portion of the back cover C2 is coupled to the seat back frame F3.

  Next, the pad unit C1 is disposed at an appropriate position in front of the seat back frame F3, the garnish 40 is inserted into the connection portion 63, and the locking claw 67 of the garnish 40 is fitted into the engagement hole of the back cover C2. As a result, the pad unit C1 is coupled to the seat back frame F3. Further, the left and right edges of the pad unit C1 are disposed on the left and right outer sides of the seat back frame F3, and the edge of the pad unit C1 is fitted into the back cover C2, thereby completing the seat back S2.

  Next, the effect of the vehicle seat S will be described. At the time of assembly, as shown in FIG. 7B, the locking claw 67 bends inward and leftward (rightward) by the load from the rod-shaped member 32. Since it is not necessary to bend the partition 69 for assembly, the rigidity of the partition 69 can be set high. As shown in FIGS. 5 (A) and 5 (B), after assembly, both the partition 69 of the right side locking portion 65R (65RU, 65RD) and the partition 69 of the left side locking portion 65L (65LU, 65LD) are provided. The rod-shaped members 32RU and 32LU are arranged on the left and right sides, respectively. Therefore, these screens 69 restrict the movement of the back cover C2 in the left-right direction with respect to the seat back frame F3. Accordingly, even when a load in the left-right direction is received, the back cover C2 is less likely to wobble from side to side with respect to the seat back frame F3.

  As shown in FIG. 7B, the rod-shaped member 32 is guided by the second inclined surface 89 so that the rod-shaped member 32 is brought into contact with the check surface 77, so that the back cover C2 can be easily assembled. . Further, since the second inclined surface 89 is formed as an inclined surface that is inclined rearward toward the locking claw 67 side, the rod-shaped member 32 passes through the gap between the first edge portion 81 and the second inclined surface 89. The bending required for the locking claw 67 is reduced. Accordingly, the rigidity of the locking claw 67 can be increased, and the back cover C2 is less likely to wobble.

  A protruding wall 71 protruding forward is formed between the locking claw 67 and the partition 69. Since the protruding wall 71 restricts the backward movement of the rod-like member 32, the forward movement of the back cover C2 with respect to the seat back frame F3 is restricted, and the back cover C2 is less likely to wobble with respect to the seat back frame F3. Further, as shown in FIG. 6, since the cross section of the protruding wall 71 has a substantially + shape, the rigidity of the protruding wall 71 against the load from the front is increased. Therefore, the protruding wall 71 more reliably restricts the forward movement of the back cover C2 with respect to the seat back frame F3 and suppresses the wobbling of the back cover C2 to the front.

  The back cover C2 is coupled to the seat back frame F3 via the hook portion 64 at the upper end and is coupled to the seat back frame F3 via the fastening portion 10 at the lower end. The locking portions 65RU, LU, RD, and LD are disposed between the hooking portion 64 and the fastening portion 10. On the other hand, since the locking claw 67 and the partition 69 restrict only the movement of the bar-shaped member 32 in the left-right direction, the bar-shaped member 32 can be displaced up and down. Therefore, even when the seat back frame F3 is deformed so as to warp backward due to a load applied to the upper body of the occupant during a rear collision or the like, the back cover C2 is hardly deformed.

  The rod-shaped member 32 is paired on the left and right sides with respect to the seat back frame F3 and is spaced apart from the left and right. Therefore, since the back cover C2 and the seat back frame are coupled at places separated from each other in the left and right directions, the back cover C2 is less likely to wobble with respect to the load in the left and right direction.

  Since the recessed part 85 is formed in the base end of the 1st protrusion piece 73, the cross-sectional area of the base end of the 1st protrusion piece 73 is smaller than the cross-sectional area of another part. Therefore, the rigidity of the base end of the 1st protrusion 73 is small, and the latching claw 67 is easy to elastically deform. Moreover, since the lightening part 83 is formed in the side surface on the side away from the partition 69 of the latching claw 67, the flexibility of the latching claw 67 increases and the assembly | attachment of the back cover C2 becomes easy.

  The back cover C2 is provided with a cushion member 95 behind the back support member 8 that supports the back of the occupant, and a hook 99 for locking the cushion member 95 is provided on the front surface of the main body. When the back support member 8 moves rearward by the cushion member 95, the load applied to the back cover C2 is reduced and protected from a collision from the back support member 8, so that the back cover C2 is not easily deformed.

  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 the present embodiment, four locking portions 65 are provided, but it is only necessary to form one set that is mirror-symmetrical in the left-right direction. Since the two locking portions 65 are formed symmetrically in the left-right direction, the partitions 69 of the two locking portions 65 come into contact with the rod-shaped member 32 from different directions on the left and right sides, so that the back cover C2 The wobbling in the left-right direction with respect to the seat back frame F3 is reduced.

  In the present embodiment, the thinned portion 93 is also formed in the partition 69, but the thinned portion 93 is not necessarily formed. Moreover, the recessed part 85 provided in the rear end of the latching claw 67 does not necessarily need to be formed so as to be recessed in the left and right inward, and may be any form that increases the flexibility of the rear end. For example, a recessed portion that is recessed outward in the left and right directions may be formed at the rear end of the locking claw 67. In the present embodiment, the first projecting piece 73 is formed in a substantially quadrangular prism shape having a main surface in the left-right direction, but may be formed in a plate shape having the main surface in the left-right direction.

  In the present embodiment, the rod-shaped member 32 is formed in a pipe shape with an annular cross section, but may be a pipe, a wire or the like having another shape. At this time, the distance between the first edge portion 81 and the second edge portion 91 may be set to be narrower than the maximum value of the width in the direction perpendicular to the extending direction of the rod-shaped member 32.

8: Back support member 10: Fastening portion 32: Bar-shaped member 60: Plate portion (main body)
64: hook part 65L: left side locking part 65R: right side locking part 67: locking claw 69: partition 71: protruding wall 73: first protruding piece (protruding piece)
75: Claw part 77: Check surface 79: 1st slope 81: 1st edge 83: Meat removal part 89: 2nd slope 91: 2nd edge 95: Cushion member 99: Hook C2: Back cover F3: Seat Back frame S: Vehicle seat S2: Seat back

FIG. 5B shows a cross-sectional view of the locking portion 65RU provided at the upper right end of the plate portion 60 at this time. In the locking portion 65RU provided at the upper right end, the first protruding piece 73 protrudes forward from the plate portion 60 and passes the left side of the rod-shaped member 32RU in the rear view, and the claw portion 75 extends from the protruding end of the first protruding piece 73. It protrudes to the right. The check surface 77 is in contact with the front surface of the rod-shaped member 32RU and restricts its forward movement. The partition 69 protrudes forward from the plate portion 60 and passes the right side of the rod-shaped member 32RU, and faces the right side of the locking claw 67 with a gap. That is, the locking portion 65RU provided at the upper right end is formed so as to be mirror symmetric in the left-right direction with respect to the locking portion 65LU provided at the upper left end. The partition 69 restricts the rightward movement of the rod-shaped member 32RU. Further, the protruding wall 71 is located behind the rod-like member 32RU, and restricts the movement of the rod-like member 32RU to the rear. 5A and 5B show a case where the left and right bar-shaped members 32LU and 32RU are both in contact with the corresponding locking claws 67. FIG. The distance between the left side surface of the left bar member 32LU and the right side surface of the right bar member 32RU is substantially the same as the distance between the left and right partitions 69, and the partition 69 is close to the corresponding bar members 32LU and 32RU. ing. Therefore, the movement of the back cover is more reliably limited.

Claims (9)

A vehicle seat having a seat back frame forming a skeleton of a seat back and a back cover provided at a rear portion of the seat back frame,
The back cover has a plate-shaped main body, a left side locking part and a right side locking part that are coupled to the main body and make a pair on the left and right sides,
The seat back frame extends vertically and includes a rod-like member on which the locking portion is hooked,
The left-side locking portion protrudes forward from the main body and passes through the right side in the rear view of the rod-shaped member, and protrudes leftward from the protrusion, and contacts the rod-shaped member so as to face the main body. A locking claw having a claw portion having a check surface, and a partition that protrudes forward from the main body and passes through the left side in a rear view of the rod-shaped member, and faces the locking claw through a gap,
The vehicle seat according to claim 1, wherein the right locking portion has a mirror symmetrical shape in the left-right direction with respect to the left locking portion. The claw portion further includes a first slope inclined toward the main body side toward the partition side,
The partition has a second inclined surface inclined toward the main body side toward the locking claw side at a protruding end,
The first edge that is the edge on the partition side of the first slope is located on the side farther from the main body than the second edge that is the edge on the locking claw side of the second slope, The vehicle seat according to claim 1, wherein a distance between the first edge and the second edge is smaller than a width of the rod-shaped member.   The said latching | locking part is protruded from the said main body between the said latching claw and the said partition, and includes the protrusion wall which restrict | limits the movement to the said main body side of the said rod-shaped member. 2. The vehicle seat according to 2.   The vehicle seat according to claim 3, wherein a cross section of the protruding wall is substantially + -shaped. The back cover includes a hook portion hooked to the seat back frame at an upper end, and a fastening portion fastened to the seat back frame at a lower end,
The vehicle seat according to any one of claims 1 to 4, wherein the locking portion is disposed between the hooking portion and the fastening portion.   The vehicle seat according to any one of claims 1 to 5, wherein the rod-shaped members are paired on the left and right sides with respect to the seat back frame and are spaced apart from each other on the left and right. .   The vehicle seat according to any one of claims 1 to 6, wherein the protruding piece includes a portion having a cross-sectional area smaller than that of the other portion at a base end.   The vehicle seat according to any one of claims 1 to 7, wherein a lightening portion is formed on a side surface of the locking claw on a side away from the partition. A back support member for supporting a back of an occupant provided in the seat back frame;
A hook projecting from the front of the body;
The vehicle seat according to any one of claims 1 to 8, further comprising a cushion member that is hooked on the hook and disposed in correspondence with the back support member.

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