JP6744560B2 - Vehicle seat - Google Patents

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 on the upper end of the front surface of the back cover. Further, a pair of upper and lower engaging claws projecting like a plate are provided on the left and right ends of the lower portion of the front surface of the back cover. The locking claws each include a claw portion that protrudes upward and downward. The seat back frame is provided with a wire with 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, the pad provided on the front side of the seed back is provided with a wire, and the back cover is provided with a pair of locking claws that engage with the wire. The protrusions of the locking claws are respectively provided with claw portions that project in opposite directions. When the wire is inserted between the claws and pushed vertically to the main body, the locking claws bend in the directions in which the claws separate from each other, and the wires are fitted between the locking claws.

JP, 2005-74276, A JP, 2003-189975, A

In the vehicle seats described in Patent Documents 1 and 2, the two cover claws both elastically deform during assembly and then restore, whereby the back cover is locked to the seat back frame. However, when a load is applied after the assembling, 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 a seat back (S2) and a back cover (C2) provided at a rear portion of the seat back frame. The back cover has a plate-shaped main body (60) and a pair of left locking portion and right locking portion (65RU, 65LU, 65RD, 65LD) coupled to the main body. The back frame extends vertically and includes a rod-shaped member (32) to which the locking portion is hooked, and the left-side locking portion protrudes forward from the main body and passes through the right side of the rod-shaped member in rear view. Locking claw (67) having a protruding piece (73) and a claw part (75) protruding leftward from the protruding piece and having a non-return surface (77) facing the body and abutting the rod-shaped member. ) And a partition (69) 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 with a gap (69), and the right side locking portion is the left side. It is preferable to form a mirror-symmetrical shape in the left-right direction with respect to the locking portion.

According to this structure, the locking portion includes the locking claw and the partition, and when assembled, the locking claw is elastically deformed so as to bend in a direction away from the partition. Due to the deformation, the rod-shaped member moves to a position where it comes into contact with the check surface, the locking claw is hooked on the rod-shaped member, and the back cover is coupled to the seat back frame. After the assembly, since the rod-shaped member is sandwiched by the 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. Further, since it is not necessary to bend the partition at the time of assembly, it is possible to provide the partition with higher rigidity. By increasing the rigidity of the screen, the wobbling of the back cover can be further suppressed.

Further, in the above configuration, the claw portion further has a first inclined surface (79) inclined toward the main body side toward the partition side, and the partition has a protrusion at the main body side toward the locking claw side. A first edge portion (81) having a second inclined surface (89) inclined to the front side and being an edge portion of the first inclined surface on the partition side is an edge portion of the second inclined surface on the locking claw side. The second edge portion (91) is located farther from the main body, and the distance between the first edge portion and the second edge portion may be smaller than the width of the rod-shaped member.

According to this structure, the rod-shaped member is guided by the second inclined surface to a position where it abuts against the check surface. Therefore, the back cover can be easily assembled. Further, since the second inclined surface is inclined toward the main body side, the flexure required for the locking claws is reduced, the rigidity of the locking claws can be increased, and the back cover can be made more difficult to wobble.

Further, in the above-mentioned configuration, the locking portion includes a projecting wall (71) projecting from the main body between the locking claw and the partition and restricting 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 projecting wall, the back cover is less likely to wobble in the front-rear direction with respect to the seat back frame.

Further, in the above-mentioned configuration, the cross section of the projecting wall may have a substantially + shape.

According to this structure, the rigidity of the projecting wall is enhanced, and the back cover becomes more difficult to wobble.

Further, in the above structure, the back cover includes a hooking portion (64) hooked on the seat back frame at an upper end and a fastening portion (10) fastened to the seat back frame at a lower end, and the locking portion. Is preferably disposed between the hook portion and the fastening portion.

According to this structure, the back cover and the seat back frame are more firmly coupled. Further, since the locking claw and the screen are coupled to the rod-shaped member so as to be vertically displaceable, the back cover is unlikely to be deformed even when the seat back frame is warped rearward.

Further, in the above structure, the rod-shaped members may be paired left and right with respect to the seat back frame, and may be arranged apart from each other in the left and right.

According to this configuration, since the rod-shaped members are arranged apart from each other on the left and right sides, the coupling between the back cover and the seat back frame is strengthened, and the back cover is less likely to wobble with respect to the lateral load.

Further, in the above-mentioned configuration, it is preferable that the projecting piece includes a portion having a smaller cross-sectional area than the other portion at the base end.

According to this structure, the locking claws are 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 away from the partition.

With this configuration, the locking claws are more easily elastically deformed, and the back cover is lightweight.

In the above structure, the back support member (8) provided on the seat back frame for supporting the back of the occupant, the hook (99) protruding from the front surface of the main body, and the hook 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 the collision from the back support member by the cushion member.

According to the above configuration, it is possible to provide a vehicle seat provided with a back cover that is hard to wobble after assembling.

1 is a perspective view of a vehicle seat according to the present invention. Assembly perspective view of the vehicle seat of FIG. The front view of the seat back of FIG. 1 and the rear view of the vehicle seat when the back cover is removed. Perspective view of a locking portion provided at the upper right end of the back cover Sectional drawing of the locking part provided in the (A) upper right end of a back cover, and the (B) upper left end. VI-VI sectional view of FIG. Sectional views of the locking member and the rod-shaped member before (A) pushing the locking member into the locking portion and (B) when pushing the locking member. 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 defined based on the occupant seated on the vehicle seat. A common number is attached to a configuration provided in a pair on the left and right, and when specifying the left and right, a left or right character is attached to the name of the configuration.

As shown in FIG. 1, the vehicle seat S is a so-called full bucket seat, and has a seat cushion S1 and a seat back S2 integrally formed with a backrest S3 and a headrest portion S4. The seat cushion S1 has a seat cushion frame, a pad and an outer skin covered on the upper side of the seat cushion frame, and supports the buttocks and thighs of an occupant. 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 connecting inner side surfaces of the cushion side frames F2. The seat back S2 is formed with a pair of left and right ventilation holes S5 penetrating in the front-rear direction at a position substantially corresponding to the shoulder of the occupant.

As shown in FIG. 2, the seat back S2 has 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 part of the seat back frame F3. As shown in FIGS. 2 and 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 back side frames 1L and 1R. It has a back lower frame 5 and a headrest frame 7 coupled to the back upper frame 3.

Each of the backside frames 1L and 1R is formed of a metal plate material so as to extend substantially vertically and has a U-shape that faces inward in a horizontal cross-sectional view. The backside frames 1L and 1R are rotatably coupled to the rear end portions of the cushion side frames F2 via the reclining mechanism R at their lower end portions. The reclining mechanism R selectively holds the tilt angles of the backside frames 1L and 1R with respect to the cushion side frame F2 at arbitrary angles. The left backside frame 1L and the right backside frame 1R are arranged apart from each other in the left-right direction to form the width of the seatback S2. A plate-shaped back support member 8 is provided between the left and right backside frames 1L, 1R. A predetermined elastic member 9 connecting the left and right backside frames 1L, 1R is spanned, and the back support member 8 is coupled to the left and right backside frames 1L, 1R via the elastic member 9. The back support member 8 can be displaced back and forth with respect to the backside frames 1L, 1R by an elastic member 9, and supports the back of the occupant with an elastic force. In the present embodiment, the back support member 8 is formed by using a plate-shaped member, but is not limited to the plate-shaped member and has a known structure formed by a structure that provides a lumbar support function (for example, a spring). You can

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

The back upper frame 3 is formed by a U-shaped metal pipe-shaped member facing downward in a front view. Both ends of the back upper frame 3 partially overlap with the upper portions of the inner surfaces of the corresponding back side frames 1L and 1R and are joined by welding or the like, and the back upper frame 3 connects the upper ends of both back side frames 1L and 1R. doing. The back lower frame 5 is also formed of a metal pipe-shaped member, and extends in the left-right direction between the lower portions of both backside frames 1L, 1R, and the left and right ends of the back lower frame 5 are inside the backside frames 1L, 1R. It is connected to the side surface by welding or the like. Further, sub-frames 6 are provided on the upper left and right ends of the back upper frame 3, respectively, for forming portions that contact the shoulders of the occupant of the seat back S2.

The seat back frame F3 is provided inside the left and right back side frames 1L, 1R and outside the back support member 8, and connects the back upper frame 3 and the left and right back side frames 1L, 1R respectively. The members 32LU and 32RU are included. The rod-shaped members 32LU and 32RU are made of metal and are formed by pipe members having an annular cross section, and are arranged apart from each other on the left and right. Both ends of the rod-shaped members 32LU and 32RU are welded to the back upper frame 3 and the backside frames 1L and 1R, respectively. Each of the rod-shaped members 32LU and 32RU includes a portion formed at a predetermined height position so as to linearly extend in the vertical direction. The seat back frame F3 further includes metal rod-shaped members 32LD and 32RD each having an annular shape below the rod-shaped members 32LD and 32RD, and both ends of which are joined to the left backside frames 1L and 1R. There is. 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 at a position of a predetermined height so as to extend linearly in the vertical direction. 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 has 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 by the seat back frame F3 from the rear side, and the skin material 37 covers substantially the front side of the pad member 36. A through hole 39 is formed in the pad member 36 at a position corresponding to the vent hole S5 so as to penetrate back and forth. Similarly to the pad member 36, the skin material 37 also has an opening formed at a position corresponding to the vent hole S5. A resin garnish 40 extending substantially rearward in a tubular shape is fitted into the opening of the skin material and the through hole 39 of the pad member 36. On the outer periphery of the rear end of the garnish 40, a plurality of locking claws (not shown) protruding inward are formed.

The headrest frame 7 has 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 that faces downward in a front view, and is connected to the upper front surface of the back upper frame 3 at its lower end portion. Similarly to the first headrest frame 50, the second headrest frame 52 and the third headrest frame 52 are each formed of a metal pipe member, and have an inverted U shape in a front view and from the first headrest frame 50 in a side view. It is formed so as to extend forward. The skeleton of the headrest portion S4 is formed by the first headrest frame 50, the second headrest frame 52, and the third headrest frame 54.

As shown in FIG. 2, the back cover C2 is a plate member made of resin arranged along the back surface of the seat back S2, and is formed symmetrically. The back cover C2 includes a plate-shaped plate portion 60 extending vertically, and a plate-shaped head portion 61 that is bent forward from an upper edge portion of the plate portion 60 and extends upward and forward. When the back cover C2 is coupled 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 portion 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 positions corresponding to the ventilation holes S5, and a tubular connecting portion 63 is continuous from the edge portion and extends forward. At the front end of the connecting portion 63, a plurality of engaging holes, which are through holes arranged so as to be arranged along the front edge, are formed. The engagement hole is arranged at a position where it engages with the locking claw of the garnish 40. At the upper end of the head portion 61, a hooking 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 protruding downward from the upper end of the head portion 61.

The back cover C2 is provided with 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 a 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 vertically and horizontally symmetrically with respect to each other. That is, the locking portion 65RU at the upper right end has a shape that is mirror-symmetrical to the locking portion 65LU at the upper left end in the left-right direction, and the locking portion 65RD at the right end at the substantially central portion is at the left end at the substantially central portion. It has a mirror-symmetrical 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 vertically symmetrical with respect to the substantially central right end locking portion 65RD and the substantially central left end locking portion 65LD, respectively. Is formed in. Hereinafter, the upper left end locking portion 65LU and the substantially central left end locking portion 65LD are referred to as a left side locking portion 65L, and the upper right end locking portion 65RU and the substantially central right end are referred to as necessary. The engaging portion 65RD of the above is referred to as a right engaging portion 65R.

The locking portions 65 (65RU, 65LU, 65RD, and 65LD) are located on the left and right outer sides of the back cover C2 with respect to the locking claws 67 projecting forward from the plate 60, respectively. It has a partition 69 facing each other through a gap, and a projecting wall 71 projecting forward from the plate portion 60 between the locking claw 67 and the partition 69. Hereinafter, the locking portion 65LU located at the upper left end will be described in detail with reference to FIGS. 4, 5A, and 6.

As shown in FIG. 4, the locking claw 67 includes a first projecting piece 73 projecting forward from the plate part 60 and a claw part 75 projecting leftward (outward left and right) from the projecting end of the first projecting piece 73. Have The first projecting piece 73 has a generally rectangular columnar shape having a main surface in the left-right direction. The claw portion 75 faces the plate portion 60 on the rear side, and faces the plate 60 in a substantially parallel rearward direction, and a first sloped surface inclined toward the partition 69 on the front side toward the plate portion 60. 79 and. 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. There is.

As shown in FIGS. 4 and 6, the rear end (base end) of the right side surface (the surface on the side away from the partition 69) of the locking claw 67 has a left side (a side close to the partition 69, left and right outer sides). ), a lightening portion 83 is formed. In this embodiment, two lightening portions 83 are formed on the locking claw 67, and the right wall of the locking claw 67 has three rib shapes.

As shown in FIG. 5A, at the rear end of the left side surface (the surface near the partition 69) of the locking claw 67, a concave portion 85 recessed to the right is formed. 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 central portion of the first projecting piece 73 in the front-rear direction.

The partition 69 has a second projecting piece 87 that projects forward from the plate portion 60 on the left side of the locking claw 67, and a second inclined surface 89 that slopes 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 rearward of 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 smaller than the diameter, which is the width in all directions. Therefore, the distance between the first edge portion 81 and the second slope 89 is smaller than the diameter of the rod-shaped member 32.

As shown in FIGS. 4 and 6, a lightening portion 93 that is recessed rightward is also formed on the left side surface of the partition 69 (the surface on the side away from the locking claw 67). In the present embodiment, two partitions 93 are formed in the partition 69, and the left side surface of the partition 69 also has three ribs.

As shown in FIG. 6, the projecting wall 71 includes a first projecting wall 71A that projects forward from the plate portion 60 between the first projecting piece 73 and the second projecting piece 87 in a plate shape having main surfaces on the left and right. , And a second projecting wall 71B that is orthogonal to the first projecting wall 71A and projects 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 71A has a rib shape extending from the space between the first projecting piece 73 and the partition 69 in the plate portion 60 to a position higher than the upper ends thereof. In the plate portion 60, the second projecting wall 71B has a rib shape that intersects with the first projecting wall 71A at a position approximately in the center in the up-down direction and extends 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 with a distance equal to or larger than the diameter of the rod member 32.

As shown in FIG. 2, the four locking portions 65 (65RU, 65LU, 65RD, and 65LD) are symmetrical in the vertical and horizontal directions, respectively. 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-symmetrical to each other in the left-right direction. There is.

In the engaging portions 65RU and 65LU provided at the upper right end and the upper left end of the back cover C2, the projecting wall 71 extends above the engaging claw 67 and the partition 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 projecting wall 71 extends below the locking claw 67 and the partition 69, respectively.

A cushion member 95 that extends in the shape of a rectangle from side to side is provided at a position on the rear side of the back support member 8 in the approximate center of the plate portion 60. As shown in FIG. 8, cushion through holes 97 of 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 has a base portion 100 in which the plate portion 60 protrudes substantially perpendicularly to the plate portion 60, and a protrusion portion 101 protruding from the projecting end of the base portion 100 along the plate portion 60. .. 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 that penetrates the back cover C2 in the front-rear direction is provided at the lower end of the plate portion 60 of the back cover C2, below the locking portion 65, and at a position corresponding to the screw hole formed in the fastening portion 10. Has been.

Next, a method of assembling 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 coupled to the upper end of the seat back frame F3. Further, the back cover C2 is arranged along the back surface of the seat back frame F3 so that the four locking portions 65 are located on the rear side of the rod-shaped member 32, respectively. 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 smaller than the diameter of the rod-shaped member 32, the rod-shaped member 32 contacts the first slope 79 and the second slope 89 before the load is applied. Touching.

Then, the worker presses the back cover C2 against the seat back frame F3 to apply a forward load to the back cover C2. FIG. 7B shows a cross-sectional view of the rod member 32 and the upper left end locking portion 65LU when a load is applied to the back cover C2. The load applied to the back cover C2 applies a load to the rod-shaped member 32 from the first inclined surface 79, 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 elastically deforms 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 portion 81 and the second inclined surface 89 are separated from each other, and a gap is formed between the first edge portion 81 and the second inclined surface 89 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 slope 89, and the rod-shaped member 32 is sandwiched between the check surface 77 and the second slope 89. Further, the rod-shaped member 32 advances toward the back cover C2 along the second slope 89, separates from the second slope 89, and enters between the first protrusion 73 and the partition 69. When the rod-shaped member 32 separates from the second slope 89, the load applied from the rod-shaped member 32 to the locking claw 67 disappears, so that the locking claw 67 elastically restores from the flexurally deformed state and returns to the original state. Therefore, as shown in FIG. 5A, the distance between the first edge portion 81 and the second slope 89 is smaller than the diameter of the rod-shaped member 32. Therefore, the rod-shaped member 32LU does not come off from the locking portion 65LU, and the locking portion 65LU is hooked on the rod-shaped member 32LU.

FIG. 5A shows a 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 through the right side of the rod-shaped member 32LU in a rear view, and the claw portion 75 projects leftward from the projecting end of the first projecting piece 73. The non-return surface 77 contacts the front surface of the rod-shaped member 32 and restricts its forward movement. The partition 69 projects forward from the plate portion 60, 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 regulates the movement of the rod-shaped member 32LU to the left. The projecting wall 71 is located behind the rod-shaped member 32LU, and restricts the rearward movement of the rod-shaped member 32LU.

FIG. 5B shows a sectional view of the locking portion 65RU provided at the upper right end of the plate portion 60 at this time. In the engaging portion 65RU provided at the upper right end, the first projecting piece 73 projects forward from the plate portion 60 and passes the left side of the rod-shaped member 32RU in rear view, and the claw portion 75 extends from the projecting end of the first projecting piece 73. It projects to the right. The non-return surface 77 abuts on the front surface of the rod-shaped member 32RU and restricts its forward movement. The partition 69 projects forward from the plate portion 60, passes through 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-symmetrical in the left-right direction with respect to the locking portion 65LU provided at the upper left end. In addition, the partition 69 regulates the movement of the rod-shaped member 32RU to the right side. Further, the projecting wall 71 is located behind the rod-shaped member 32RU and restricts the rearward movement of the rod-shaped member 32RU. FIGS. 5A and 5B show a case where the left and right rod-shaped members 32LU and 32RU are both in contact with the corresponding locking claws 67. The distance between the left side surface of the left rod-shaped member 32LU and the right side surface of the right rod-shaped member 32RU is substantially the same as the distance between the left and right partitions 69, and the partitions 69 are close to the corresponding rod-shaped members 32LU and 32RU. ing. Therefore, the movement of the back cover is more surely restricted.

Further, a screw is passed through the through hole 62 of the back cover C2, and the screw is fastened to the 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 arranged at an appropriate position in front of the seat back frame F3, the garnish 40 is inserted into the connecting portion 63, and the locking claw 67 of the garnish 40 is fitted into the engaging 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 arranged outside the left and right sides of the seat back frame F3, and the edge portions of the pad unit C1 are fitted into the back cover C2, whereby the seat back S2 is completed.

Next, the effect of the vehicle seat S will be described. At the time of assembly, as shown in FIG. 7(B), the locking claw 67 is bent inward from the rod-shaped member 32 inward (rightward) by a load. 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 the assembly, the right-side engaging portion 65R (65RU, 65RD) and the left-side engaging portion 65L (65LU, 65LD) both the partition 69. , The rod-shaped members 32RU and 32LU are arranged on the left and right sides respectively. Therefore, the partitions 69 regulate the movement of the back cover C2 in the left-right direction with respect to the seat back frame F3. Therefore, the back cover C2 is less likely to wobble from side to side with respect to the seat back frame F3 even when a lateral load is applied.

As shown in FIG. 7B, the rod-shaped member 32 is moved by the second inclined surface 89, so that the rod-shaped member 32 is guided to the position where it abuts against the check surface 77, so that the back cover C2 can be easily assembled. .. Further, since the second slope 89 is formed as a slope inclined rearward toward the locking claw 67 side, when the rod-shaped member 32 passes through the gap between the first edge portion 81 and the second slope 89. The flexure required for the locking claw 67 is reduced. Therefore, the rigidity of the locking claw 67 can be increased, and the back cover C2 becomes more difficult to wobble.

A projecting wall 71 projecting forward is formed between the locking claw 67 and the partition 69. Since the protruding wall 71 regulates the rearward movement of the rod-shaped member 32, the forward movement of the back cover C2 with respect to the seat back frame F3 is regulated, 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 projecting wall 71 has a substantially + shape, the rigidity against the load from the front of the projecting wall 71 is enhanced. Therefore, the projecting wall 71 more reliably regulates the forward movement of the back cover C2 with respect to the seat back frame F3, and the forward wobbling of the back cover C2 is suppressed.

The back cover C2 is coupled at its upper end to the seat back frame F3 via the hooking portion 64, and is coupled at its lower end to the seat back frame F3 via the fastening portion 10. The locking portions 65RU, LU, RD, and LD are arranged between the hook portion 64 and the fastening portion 10. On the other hand, since the locking claw 67 and the partition 69 restrict only the lateral movement of the rod-shaped member 32, the rod-shaped member 32 can be vertically displaced. Therefore, even if the seat back frame F3 is deformed so as to warp rearward due to the load applied to the upper body of the occupant at the time of a rear collision or the like, the back cover C2 is unlikely to be deformed.

The rod-shaped members 32 form a pair on the left and right with respect to the seat back frame F3, and are arranged apart from each other on the left and right. Therefore, since the back cover C2 and the seat back frame are coupled to each other in the left and right positions, the back cover C2 is less likely to wobble with respect to the load in the left and right directions.

Since the concave portion 85 is formed at the base end of the first projecting piece 73, the cross-sectional area of the base end of the first projecting piece 73 is smaller than the cross-sectional area of other portions. Therefore, the rigidity of the base end of the first protrusion 73 is low, and the locking claw 67 is easily elastically deformed. Further, since the lightening portion 83 is formed on the side surface of the locking claw 67 on the side away from the partition 69, the locking claw 67 is more flexible and the back cover C2 can be easily assembled.

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 so as to project therefrom. The cushion member 95 reduces the load applied to the back cover C2 when the back support member 8 moves rearward, and protects the back cover C2 from a collision from the back support member 8, so that the back cover C2 is less likely to be deformed.

Although the description of the specific embodiment is finished above, the present invention is not limited to the above embodiment and can be widely modified and implemented. In this embodiment, four locking portions 65 are provided, but one set may be formed so as to be mirror-symmetrical to each other in the left-right direction. Since the two locking portions 65 are mirror-symmetrically formed 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 left and right directions. The wobble in the left-right direction with respect to the seat back frame F3 is reduced.

In the present embodiment, the lightening portion 93 is also formed on the partition 69, but the lightening portion 93 does not necessarily have to be formed. Further, the recessed portion 85 provided at the rear end of the locking claw 67 does not necessarily have to be formed so as to be recessed inward in the left and right directions, and may have any mode that enhances the flexibility of the rear end. For example, a recess that is recessed outward in the left and right directions may be formed at the rear end of the locking claw 67. Further, 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 it may be formed in a plate shape having a main surface in the left-right direction.

In the present embodiment, the rod-shaped member 32 is formed into a pipe shape having an annular cross section, but it may be a pipe, 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 smaller 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 part 32: Bar-shaped member 60: Plate part (main body)
64: Hooking part 65L: Left side locking part 65R: Right side locking part 67: Locking claw 69: Partition 71: Projection wall 73: First projection piece (projection piece)
75: Claw 77: Non-return surface 79: First slope 81: First edge 83: Lightening portion 89: Second slope 91: Second edge 95: Cushion member 99: Hook C2: Back cover F3: Seat Back frame S: Vehicle seat S2: Seat back

Claims (8)

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, and has a left-side locking portion and a right-side locking portion which are coupled to the main body and are paired on the left and right,
The seat back frame extends vertically and includes a rod-shaped member to which the locking portion is hooked,
The left-side locking portion projects forward from the main body and passes on the right side in a rear view of the rod-shaped member, and projects leftward from the protrusion and abuts on the rod-shaped member facing the main body. A locking claw having a claw portion having a check surface, a partition projecting forward from the main body, passing through the left side of the rod-shaped member in rear view, and facing the locking claw via a gap; A projecting wall projecting from the main body between the pawl and the partition, and limiting a movement of the rod-shaped member toward the main body side,
A vehicle seat characterized in that a lightening portion recessed toward the partition side is formed on a side surface of the locking claw away from the partition. The vehicle seat according to claim 1, wherein a width of the locking claw in the left-right direction is smaller than a width of the partition in the left-right direction. The vehicle seat according to claim 1 or 2, wherein a lightening portion is formed on a surface of the partition away from the locking claw. A back support member for supporting the back of the occupant provided on the seat back frame,
The vehicle seat according to any one of claims 1 to 3, wherein the locking claw is located between the back support member and the seat back frame. A hook protruding from the front surface of the main body,
A cushion member hooked on the hook and arranged corresponding to the back support member,
The vehicle seat according to claim 4, wherein the locking claws are arranged between the left and right outer edges of the cushion member and the left and right outer edges of the seat back frame. The back support member is coupled to the seat back frame via an elastic member that is stretched left and right,
The vehicle seat according to claim 4 or 5, wherein at least one of the locking claws is located at a position overlapping the elastic member from the rear side. In the seat back, a pair of left and right through holes penetrating forward and backward is formed at a position substantially corresponding to the shoulder of the occupant,
The vehicle seat according to any one of claims 1 to 6, wherein the locking claw is located below the through hole. 8. The distance between the left and right partitions is substantially the same as the distance between the left surface of the left rod-shaped member and the right surface of the right rod-shaped member. The vehicle seat according to item 1.

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