Suspension mat and vehicle seat

Abstract

To prevent a hook from being unexpectedly pulled out from a side frame portion of a seat back.SOLUTION: A suspension mat 40 includes: a mat main body 42 arranged between left and right side frame portions 24 that are included in a frame 22 of a seat back of a vehicle seat and supporting a pad of the seat back from the seat rear side; lower hooks 52 each having one end connected to the mat main body 42 and the other end inserted into a locking hole 32 formed in the side frame portion 24; and stoppers (anti-pullout members) 56 each attached to the other end of the lower hook 52 and configured to prevent the other end of the lower hook 52 from being pulled out of the locking hole 32.SELECTED DRAWING: Figure 3

Description

Technical Field

[0001] The present invention relates to a vehicle seat, and more particularly to a suspension mat for a seat back.

Background Art

[0002] Patent Document 1 below discloses an elastic support member (suspension mat) that is attached to the frame of a seat back and elastically supports the pad of the seat back. A plurality of hook members are attached to the suspension mat, and each hook member is hooked in a hole of a fastener provided on the left and right side frame portions of the seat back frame.

Prior Art Documents

Patent Documents

[0003]

Patent Document 1

Summary of the Invention

Problems to be Solved by the Invention

[0004] In the above prior art, for example, when attaching a side airbag device to the frame of a seat back or when covering a pad of the seat back with a trim cover, the suspension mat may be pushed obliquely forward and laterally in the seat, causing the hook member to come off the hole of the fastener.

[0005] In consideration of the above facts, an object of the present invention is to obtain a suspension mat that can prevent the hook from inadvertently coming off from the side frame portion of the seat back, and a vehicle seat provided with the suspension mat.

Means for Solving the Problems

[0006] The suspension mat of the first aspect is disposed between left and right side frame portions of a frame of a seat back of a vehicle seat, and includes a mat body that supports a pad of the seat back from the rear side of the seat, a hook having one end connected to the mat body and the other end inserted into a hole formed in the side frame portion, and a retaining member attached to the other end of the hook for restricting the other end from coming out of the hole.

[0007] In the suspension mat of the first aspect, the mat body is disposed between left and right side frame portions of a frame of a seat back of a vehicle seat, and the other end of a hook having one end connected to the mat body is inserted into a hole formed in the side frame portion. The pad of the seat back is supported from the rear side of the seat by this mat body. A retaining member for restricting the other end of the hook from coming out of the hole in the side frame portion is attached to the other end of the hook. Thereby, it is possible to prevent the hook from accidentally coming off from the side frame portion.

[0008] The suspension mat of the second aspect is, in the first aspect, wherein the retaining member is formed in a cylindrical shape and has a cylindrical portion into which the other end of the hook is press-fitted, and a claw portion that protrudes from an outer peripheral portion of the cylindrical portion and is caught by an edge portion of the hole.

[0009] In the suspension mat of the second aspect, the other end of the hook is press-fitted into the cylindrical portion of the retaining member, and the claw portion protruding from the outer peripheral portion of the cylindrical portion is caught by the edge portion of the hole in the side frame portion. Thereby, it is possible to effectively prevent the hook from coming off from the side frame portion.

[0010] The suspension mat of the third aspect is, in the second aspect, wherein the cylindrical portion and the claw portion are connected via an integral hinge, and the claw portion is displaceable with respect to the cylindrical portion between a use position held on the outer peripheral portion of the cylindrical portion and protruding from the outer peripheral portion, and a deployment position arranged side by side with respect to the cylindrical portion in the axial direction.

[0011] In the suspension mat of the third aspect, the cylindrical portion and the claw portion of the retaining member are connected via an integral hinge. The claw portion is displaceable between a use position and a deployed position with respect to the cylindrical portion. In the use position, the claw portion is held on the outer peripheral portion of the cylindrical portion and protrudes from the outer peripheral portion. In the deployed position, the claw portions are arranged side by side in the axial direction with respect to the cylindrical portion. Therefore, for example, when removing this suspension from the side frame portion, by arranging the claw portion in the deployed position with respect to the cylindrical portion, the operation of pulling out the retaining member from the hole in the side frame portion becomes easy.

[0012] The vehicle seat according to the fourth aspect includes a seat cushion on which an occupant of the vehicle sits and a seat back that supports the back of the occupant, and the seat back includes a frame, a pad, and the mat body disposed between left and right side frame portions of the frame, and the mat body supports the pad from the rear side of the seat, and the suspension mat according to claim 1 or claim 2, wherein the retaining member is attached to the other end of the hook inserted into the hole formed in the side frame portion.

[0013] In the vehicle seat according to the fourth aspect, the back of the occupant sitting on the seat cushion is supported by the seat back. Between the left and right side frame portions of the frame of the seat back, the mat body of the suspension mat is disposed. The pad of the seat back is supported from the rear side of the seat by this mat body. The other end of the hook included in the mat body is inserted into the hole formed in the side frame portion, and a retaining member is attached to the other end of the hook. Since the above suspension mat is of any one of the first to third aspects, the above-described effects can be obtained.

Advantages of the Invention

[0014] As described above, in the suspension mat and the vehicle seat according to the present invention, it is possible to prevent the hook from accidentally coming off from the side frame portion of the seat back.

Brief Description of the Drawings

[0015]

Figure 1

Figure 2

Figure 3

Figure 4

Figure 5

Figure 6

Figure 7

Figure 8

Figure 9

Figure 10

Figure 11

MODE FOR CARRYING OUT THE INVENTION

[0016] Hereinafter, a vehicle seat 10 according to an embodiment of the present invention will be described with reference to FIGS. 1 to 11. In each figure, some reference numerals may be omitted for ease of viewing the drawings. Also, the arrows FR, LH, and UP appropriately shown in each figure indicate the front, left, and upper directions of the vehicle seat 10, respectively.

[0017] As shown in FIG. 1, the vehicle seat 10 according to the present embodiment includes a seat cushion 12 on which a vehicle occupant sits, a seat back 14 that supports the occupant's back, and a headrest 16 that supports the occupant's head. The seat cushion 12 is attached to the floor portion F of the vehicle via a slide rail 18. The seat back 14 is connected to the seat cushion 12 via a reclining mechanism 20. The headrest 16 is attached to the upper end portion of the seat back 14 so that its vertical position can be adjusted.

[0018] The seat back 14 includes a frame 22 (see FIG. 2) which is a skeletal member, a pad 34 (see FIG. 1) which is a cushion material attached to the frame 22, a trim cover 36 that covers the pad 34, and a suspension mat (spring mat) 40 that is attached to the frame 22 and elastically supports the pad 34 from the rear side of the seat.

[0019] The frame 22 has left and right side frame portions 24 that extend in the vertical direction of the seat back 14 on the left and right side portions of the seat back 14, an upper frame portion 26 that connects the upper end portions of the left and right side frame portions 24 in the left - right direction, and a lower frame portion 28 that connects the lower end portions of the left and right side frame portions 24 in the left - right direction. The left and right side frame portions 24, the upper frame portion 26, and the lower frame portion 28 are formed of, for example, press - formed metal plate materials.

[0020] The side frame portion 24 has a side wall portion 24A with the left - right direction (seat width direction) as the plate thickness direction, a front flange portion 24B that extends from the front edge of the side wall portion 24A to the inside in the seat width direction, and a rear flange portion 24C that extends from the rear edge portion of the side wall portion 24A to the inside in the seat width direction.

[0021] The pad 34 is formed of a foam such as polyurethane foam, for example, and is covered over the frame 22 from above. The trim cover 36 is formed in a bag shape by sewing a plurality of skin pieces made of, for example, cloth material, leather, synthetic leather, etc., and is covered over the pad 34 from above.

[0022] The suspension mat 40 is composed of a mat body 42 disposed between the left and right side frame portions 24, a plurality (here, two) of upper hooks 50, a plurality (here, four) of lower hooks 52, and a plurality of stoppers 56 respectively attached to the plurality of lower hooks 52. The lower hook 52 corresponds to the "hook" in the present invention, and the stopper 56 corresponds to the "anti-removal member" in the present invention. The mat body 42 is configured in a substantially lattice shape. This mat body 42 has a plurality (here, two) of side vertical extension portions 44, a plurality (here, six) of horizontal extension portions 46, and one central vertical extension portion 48. The side vertical extension portions 44 and the horizontal extension portions 46 are composed of linear spring materials, and the central vertical extension portion 48 is composed of a linear resin material.

[0023] The two side vertical extension portions 44 extend in the vertical direction of the seat back 14 at the left and right side portions of the seat back 14. These side vertical extension portions 44 are covered by a coating portion (reference numeral omitted) formed by resin coating. The six horizontal extension portions 46 each extend in the left-right direction and are spaced apart in the vertical direction of the seat back 14. At the middle portion in the left-right direction of each horizontal extension portion 46, two left and right bending portions (reference numeral omitted) bent in a substantially inverted U shape upward of the seat back 14 are formed. The central vertical extension portion 48 extends in the vertical direction of the seat back 14, and the left-right central portions of the lower five horizontal extension portions 46 penetrate the central vertical extension portion 48. The left-right central portions of the lower five horizontal extension portions 46 are formed by molding with a mold after being penetrated by the central vertical extension portion 48.

[0024] Upper hooks 50 are respectively spanned between the upper ends of the left and right side vertical extension parts 44 and the vertical middle parts of the left and right side frame parts 24. The left and right upper hooks 50 are respectively constituted by, for example, linear spring materials. One ends of the left and right upper hooks 50 are respectively wound around and connected to the upper ends of the left and right side vertical extension parts 44. The other ends of the left and right upper hooks 50 are respectively bent in a J shape and inserted into locking holes 30 formed in side wall parts 24A of the left and right side frame parts 24. The locking holes 30 are constituted by two holes arranged in the vertical direction, and the other ends of the upper hooks 50 are hooked on the part between the two holes. The upper end part of the mat body 42 is supported by the left and right side frame parts 24 via these upper hooks 50.

[0025] Between the lower parts of the left and right side vertical extension parts 44 and the lower parts of the left and right side frame parts 24, two upper and lower lower hooks 52 are respectively spanned. Each lower hook 52 is constituted by, for example, a linear spring material. One ends of the two left lower hooks 52 are respectively wound around and connected to the lower part of the left side vertical extension part 44. The other ends of the two left lower hooks 52 are respectively bent in a J shape and inserted into two upper and lower locking holes 32 formed in a front flange part 24B of the left side frame part 24 from the front side and hooked on the left side frame part 24.

[0026] One ends of the two right lower hooks 52 are respectively wound around and connected to the lower part of the right side vertical extension part 44. The other ends of the two right lower hooks 52 are respectively bent in a J shape and inserted into two upper and lower locking holes 32 formed in a front flange part 24B of the right side frame part 24 from the front side and hooked on the right side frame part 24. The lower part of the mat body 42 is supported by the left and right side frame parts 24 via the four lower hooks 52. The four locking holes 32 correspond to the "holes" in the present invention.

[0027] As shown in FIGS. 3 and 4, the other end of each lower hook 52 is covered by a coating portion 54 formed by resin coating. Further, stoppers 56 are respectively attached to the tip side of the other end of each lower hook 52, and the removal of the other end of each lower hook 52 from each locking hole 32 is restricted.

[0028] As shown in FIGS. 3 to 8, the stopper 56 is manufactured by, for example, injection molding of resin, and has a cylindrical portion 58 and a claw portion 60. The cylindrical portion 58 has a bottom portion 58A at one end in the axial direction and an opening portion 58B at the other end in the axial direction, and is formed in a bottomed cylindrical shape. The tip side of the other end of the lower hook 52 is press-fitted into the cylindrical portion 58 from the above-mentioned opening portion 58B. Thereby, the stopper 56 is attached to the tip side of the other end of the lower hook 52. The attachment of the stopper 56 to the lower hook 52 is performed, for example, in a sub-process before the assembly process of the vehicle seat 10.

[0029] A groove portion 58C extending in the axial direction of the cylindrical portion 58 is formed on the outer peripheral portion of the cylindrical portion 58. The groove portion 58C communicates with the inside of the cylindrical portion 58, and a pair of stepped portions 58D facing each other in the circumferential direction of the cylindrical portion 58 are formed between the groove portion 58C and the inside of the cylindrical portion 58.

[0030] The claw portion 60 is formed in a long, substantially prismatic shape. The length dimension of the claw portion 60 is set to be slightly shorter than the length dimension of the cylindrical portion 58. One end in the longitudinal direction of the claw portion 60 is integrally connected to one end in the axial direction of the cylindrical portion 58 (the end on the bottom portion 58A side) via an integral hinge 62. The claw portion 60 is displaceable with respect to the cylindrical portion 58 between a use position (the position shown in FIGS. 3 to 6) where it is press-fitted and fitted into the groove portion 58C and a deployed position (the position shown in FIGS. 7 and 8) where it is arranged side by side on one side in the axial direction with respect to the cylindrical portion 58.

[0031] The above-mentioned claw portion 60 has a protruding portion 60A that protrudes from the outer peripheral portion of the cylindrical portion 58 in a state of being located at the use position. The protruding portion 60A is provided at the other end in the longitudinal direction of the claw portion 60 (that is, the end opposite to the integral hinge 62), and the claw portion 60 is formed such that the other end in the longitudinal direction is wider than the one end in the longitudinal direction. As shown in FIG. 9, when the above-mentioned protruding portion 60A is hooked from the rear side of the seat to the edge of the locking hole 32, the stopper 56 (that is, the other end of the lower hook 52) is configured to be restricted from coming out of the locking hole 32.

[0032] The maximum width dimension of the stopper 56 along the radial direction of the cylindrical portion 58 in a state where the claw portion 60 is located at the use position (the width dimension of the portion where the protruding portion 60A is provided) is set to be slightly smaller than the hole diameter of the locking hole 32. The protruding portion 60A is formed such that the protruding height gradually decreases toward one end side in the longitudinal direction of the claw portion 60, and the surface facing one end side in the longitudinal direction of the claw portion 60 is an inclined surface (curved surface) 61. As shown in FIG. 10, when the stopper 56 is inserted into the locking hole 32 together with the other end of the lower hook 52 (see the arrow IN in FIG. 10), the above-mentioned inclined surface 61 is in sliding contact with the edge of the locking hole 32. Thereby, the protruding portion 60A is configured not to interfere with the above insertion.

[0033] Also, as shown in FIG. 11, by rotating the claw portion 60 around the integral hinge 62 with respect to the cylindrical portion 58 and arranging it at the deployment position (see the arrow OP in FIG. 11), the protruding portion 60A no longer protrudes from the outer peripheral portion of the cylindrical portion 58. Thereby, for example, when repairing or maintaining the vehicle seat 10, the lower hook 52 is configured to be easily removed from the side frame portion 24.

[0034] In the vehicle seat 10 configured as described above, the back of the occupant sitting on the seat cushion 12 is supported by the seat back 14. Between the left and right side frame portions 24 of the frame 22 of the seat back 14, the mat body 42 of the suspension mat 40 is disposed. One end of the lower hook 52 is connected to the mat body 42, and the other end of the lower hook 52 is inserted into the locking hole 32 formed in the side frame portion 24. The pad 34 of the seat back 14 is supported from the rear side by this mat body 42.

[0035] A stopper 56 for restricting the removal of the other end of the lower hook 52 from the locking hole 32 of the side frame portion 24 is attached to the other end of the lower hook 52. Thereby, for example, when the side airbag device is attached to the frame 22 of the seat back 14 or when the trim cover 36 is put on the pad 34 of the seat back 14, even when the suspension mat 40 is pushed obliquely forward in the lateral direction, it is possible to prevent the lower hook 52 from being inadvertently detached from the side frame portion 24.

[0036] Further, the above-described stopper 56 is formed in a cylindrical shape, and has a cylindrical portion 58 into which the other end of the lower hook 52 is press-fitted, and a claw portion 60 in which a protruding portion 60A protrudes from the outer peripheral portion of the cylindrical portion 58 and the protruding portion 60A is caught by the edge portion of the locking hole 32. Thereby, it is possible to effectively prevent the lower hook 52 from coming off the side frame portion 24.

[0037] Further, the cylindrical portion 58 and the claw portion 60 are connected via an integral hinge 62, and the claw portion 60 is held on the outer peripheral portion of the cylindrical portion 58, and the protruding portion 60A is displaced relative to the cylindrical portion 58 between a use position protruding from the outer peripheral portion of the cylindrical portion 58 and a deployment position arranged side by side in the axial direction with respect to the cylindrical portion 58. Therefore, for example, when removing the suspension mat 40 from the side frame portion 24 for repair or maintenance of the vehicle seat 10, etc., by arranging the claw portion 60 in the deployment position with respect to the cylindrical portion 58, the operation of pulling out the stopper 56 from the locking hole 32 of the side frame portion 24 becomes easy.

[0038] In addition, in the above-described embodiment, the suspension mat 40 is configured to include four lower hooks 52 (corresponding to the "hooks" in the present invention), but the present invention is not limited thereto, and the number of hooks can be appropriately changed.

[0039] Also, in the above-described embodiment, the cylindrical portion 58 and the claw portion 60 of the stopper 56 are connected via an integral hinge 62, but the present invention is not limited thereto. For example, a configuration may be adopted in which an elastically deformable claw portion is provided on the outer peripheral portion of the cylindrical portion 58.

[0040] In addition, the present invention can be implemented with various modifications without departing from the gist thereof. Of course, the scope of rights of the present invention is not limited to the above-described embodiment.

Explanation of Reference Numerals

[0041] 10 Vehicle seat 12 Seat cushion 14 Seat back 22 Frame 24 Side frame portion 32 Locking hole (hole) 34 Pad 40 Suspension mat 42 Mat body 52 Lower hook (hook) 56 Stopper (preventing removal member) 58 Cylindrical portion 60 Claw portion 62 Integral hinge

Claims

1. A mat body disposed between left and right side frame portions of a frame of a seat back of a vehicle seat, for supporting a pad of the seat back from the rear side of the seat; A hook having one end connected to the mat body and the other end inserted into a hole formed in the side frame portion; A retaining member attached to the other end of the hook for restricting the other end from coming out of the hole; A suspension mat comprising the above.

2. The retaining member is Formed in a cylindrical shape, having a cylindrical portion into which the other end of the hook is press-fitted; A claw portion protruding from an outer peripheral portion of the cylindrical portion and hooked on an edge portion of the hole; The suspension mat according to Claim 1, having the above.

3. The cylindrical portion and the claw portion are connected via an integral hinge; The claw portion is displaceable with respect to the cylindrical portion between a use position held on the outer peripheral portion of the cylindrical portion and protruding from the outer peripheral portion, and a deployment position arranged side by side with the cylindrical portion in the axial direction. The suspension mat according to Claim 2.

4. A seat cushion on which an occupant of a vehicle sits; A seat back for supporting the back of the occupant; Comprising the above, The seat back is A frame; A pad; The pad is supported from the rear side of the seat by the mat body disposed between left and right side frame portions of the frame, and the retaining member is attached to the other end of the hook inserted into a hole formed in the side frame portion. The suspension mat according to Claim 1 or Claim 2; A vehicle seat having the above.

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