Vehicle seats

Abstract

To provide a seat for a vehicle that can improve rigidity of a frame to which a backing member is fitted.SOLUTION: A seat for a vehicle includes: a seat cushion; a seat back; a frame for supporting the seat cushion or the seat back; and a backing member fixed to the frame. The frame includes: a plate part; and a bead provided so as to straddle a boundary between a fitting region of the plate part on which the backing member is superposed and the other region.SELECTED DRAWING: Figure 3

Description

[Technical Field]

[0001] The present disclosure relates to vehicle seats. [Background technology]

[0002] A support member such as a bracket is attached to the frame of a vehicle seat installed in an automobile or the like for the purpose of supporting device components, etc. (see Patent Document 1). The support member is fixed to a plate portion of the frame by means of fastening or the like. [Prior art documents] [Patent documents]

[0003] [Patent Document 1] Japanese Patent Application Publication No. 2019-73184 Summary of the Invention [Problem to be solved by the invention]

[0004] In a frame with a pad attached, a discontinuity in stiffness occurs at the boundary between the area where the pad overlaps and the other area. Therefore, when a load is applied to the frame, strain that induces frame breakage propagates near this boundary, making the frame more likely to break.

[0005] An object of one aspect of the present disclosure is to provide a vehicle seat that can increase the rigidity of a frame to which a pad member is attached. [Means for solving the problem]

[0006] One aspect of the present disclosure is a vehicle seat (1) including a seat cushion (2), a seat back (3), a frame (41) that supports the seat cushion (2) or the seat back (3), and a pad (8) fixed to the frame (41). The frame (41) has a plate portion (411) and a bead (412) that is provided so as to straddle a boundary (41C) between an attachment region (41A) of the plate portion (411) where the pad (8) is overlapped and another region (41B).

[0007] According to this configuration, the bead 412 reduces strain propagating through the boundary 41C between the attachment region 41A and the other region 41B, thereby increasing the rigidity of the frame 41.

[0008] In one embodiment of the present disclosure, the attachment region 41A may have two fixing regions 41D to which the backing member 8 is fixed. The bead 412 may be sandwiched between the two fixing regions 41D in the width direction of the bead 412. This configuration enhances the effect of reducing distortion at the boundary 41C.

[0009] In one embodiment of the present disclosure, the plate portion 411 may be strip-shaped. The bead 412 may extend in the longitudinal direction of the plate portion 411 from outside the attachment region 41A across the boundary 41C to a position deeper than the two fixing regions 41D. This configuration enhances the distortion reduction effect of the bead 412.

[0010] One aspect of the present disclosure may further include a rotation mechanism (75) attached to the plate portion (411) so as to sandwich the plate portion (411) together with the backing member (8). The rotation mechanism (75) may have a shaft portion (752) that penetrates the plate portion (411) and rotates about its axis. The backing member (8) may have a bearing (82) that holds the shaft portion (752). This configuration increases the rigidity of the frame (41) to which the rotation mechanism (75) is attached.

[0011] In one embodiment of the present disclosure, the frame 41 may be part of a cushion frame 4 that supports the seat cushion 2. The rotation mechanism 75 may be part of a mechanism that raises and lowers the cushion frame 4. This configuration increases the rigidity of the cushion frame 4 to which the raising and lowering mechanism is attached.

[0012] In one aspect of the present disclosure, the bead 412 may have a shape that is convex toward the backing member 8. With this configuration, it is possible to reduce distortion at the boundary 41C while avoiding interference between the bead 412 and the rotation mechanism 75.

[0013] Note that the symbols in the parentheses above are examples showing the correspondence with the specific configurations, etc. described in the embodiments described below, and the present disclosure is not limited to the specific configurations, etc. shown by the symbols in the parentheses above. [Brief explanation of the drawings]

[0014] [Figure 1] FIG. 1 is a schematic perspective view of a vehicle seat according to an embodiment. [Figure 2] FIG. 2 is a schematic perspective view of a cushion frame, a slide device, and a lifter device in the vehicle seat of FIG. [Figure 3] 3 is a schematic side view of a first side frame, a first link, and a backing member in the cushion frame of FIG. 2. FIG. [Figure 4] 4 is a schematic exploded perspective view of the first side frame, the first link, the rotation mechanism, and the pad member in the cushion frame of FIG. 2. FIG. [Figure 5] FIG. 5 is a schematic partial enlarged view of the first side frame of FIG. [Figure 6] 6A is a schematic cross-sectional view taken along line VIA-VIA in FIG. 3, and FIGS. 6B and 6C are schematic cross-sectional views of beads and backing members in embodiments different from that in FIG. 6A. [Figure 7] FIG. 7 is a schematic cross-sectional view of a bead and a backing member in an embodiment different from that in FIG. 6A. DETAILED DESCRIPTION OF THE INVENTION

[0015] Hereinafter, embodiments to which the present disclosure is applied will be described with reference to the drawings. [1. First embodiment] [1-1.Configuration] The vehicle seat 1 shown in FIG. 1 includes a seat cushion 2, a seat back 3, a cushion frame 4, a back frame 5, a first sliding device 6A, a second sliding device 6B, a lifter device 7, and a pad member 8.

[0016] The vehicle seat 1 of this embodiment is used as a seat for a passenger vehicle. Note that the directions in the following description and in each drawing refer to directions when the vehicle seat 1 is assembled to the vehicle (i.e., the passenger vehicle). In this embodiment, the seat width direction coincides with the left-right direction of the vehicle, and the front of the seat coincides with the front of the vehicle.

[0017] The seat cushion 2 is a portion for supporting the buttocks and the like of a seated person. The seat back 3 is a portion for supporting the back of a seated person. The cushion frame 4 supports the seat cushion 2. The back frame 5 supports the seat back 3.

[0018] <Cushion frame> As shown in FIG. 2, the cushion frame 4 includes a first side frame 41, a second side frame 42, a front panel 43, a first rod 44, and a second rod 45.

[0019] The first side frame 41 and the second side frame 42 are panel-shaped members that extend in the front-rear direction of the seat and are spaced apart from each other in the width direction of the seat. The first side frame 41 is disposed on the right side of the second side frame 42.

[0020] 3, the first side frame 41 has a strip-shaped plate portion 411 and a bead 412 provided on the plate portion 411. The shape of the bead 412 will be described later.

[0021] 2 is disposed so as to straddle the front end portions of the first side frame 41 and the second side frame 42. The first rod 44 and the second rod 45 each connect the first side frame 41 and the second side frame 42 in the seat width direction, behind the front panel 43. The second rod 45 is disposed behind the first rod 44 in the seat.

[0022] <Slide device> The first sliding device 6A and the second sliding device 6B each slide the cushion frame 4 in the front-rear direction of the seat.

[0023] The first sliding device 6A has a movable rail connected to the first side frame 41 and a fixed rail that slidably supports the movable rail. The second sliding device 6B has a movable rail connected to the second side frame 42 and a fixed rail that slidably supports the movable rail.

[0024] <Lifter device> The lifter device 7 is a mechanism that moves the cushion frame 4 up and down relative to the first slide device 6A and the second slide device 6B, thereby raising and lowering the seat cushion 2 and the cushion frame 4.

[0025] The lifter device 7 is driven by manual operation by a seated person and includes a first link 71, a second link 72, a third link 73, a fourth link 74, a rotation mechanism 75, and an operation bracket 76.

[0026] The first link 71 connects the first side frame 41 and the movable rail of the first sliding device 6A. The first link 71 is rotatably attached to both the first side frame 41 and the first sliding device 6A.

[0027] The first link 71 is located more inward in the seat width direction than the first side frame 41. As shown in FIG.

[0028] The sector gear portion 711 is rotatably attached to the first side frame 41. The sector gear portion 711 also meshes with a pinion gear 753 (see FIG. 4) of the rotation mechanism 75. The rotation axis of the sector gear portion 711 is parallel to the seat width direction.

[0029] The first link 71 rotates (ie, swings) in the vertical direction relative to the first side frame 41 due to the rotation of the pinion gear 753 meshed with the sector gear portion 711 (ie, the power transmitted from the pinion gear 753).

[0030] The connecting portion 712 extends from the sector gear portion 711 and is rotatably attached to the movable rail of the first sliding device 6 A. The opening 713 is provided in an area behind the gear teeth of the sector gear portion 711 and behind the seat.

[0031] 2 connects the first side frame 41 and the movable rail of the first slide device 6A at a position in front of the seat relative to the first link 71. The second link 72 cooperates with the first link 71 to move the first side frame 41 up and down.

[0032] The third link 73 and the fourth link 74 each connect the second side frame 42 and the movable rail of the second slide device 6B. The third link 73 is connected to the first link 71 by the first rod 44. The third link 73 operates in synchronization with the first link 71. The fourth link 74 is connected to the second link 72 by the second rod 45. The fourth link 74 operates in synchronization with the second link 72.

[0033] The rotation mechanism 75 is a known mechanism that transmits the driving force input from the operation bracket 76 as a rotation force to the first link 71. The rotation mechanism 75 is attached to the plate portion 411 of the first side frame 41 so as to sandwich the plate portion 411 together with the contact member 8.

[0034] As shown in FIG. 4, the rotation mechanism 75 includes a brake mechanism 751, a shaft portion 752, a pinion gear 753, a first bolt 754A, a second bolt 754B, and a third bolt 754C.

[0035] The brake mechanism 751 is configured to rotate the shaft portion 752 about its axis by the driving force input from the operation bracket 76. The brake mechanism 751 also prevents the shaft portion 752 from reversing due to the weight of a seated person acting on the seat cushion 2. The brake mechanism 751 is disposed on the outer side of the first side frame 41 in the seat width direction.

[0036] The shaft portion 752 penetrates the plate portion 411 and the contact member 8 in the seat width direction. One end of the shaft portion 752 is located inside (i.e., on the left side of) the contact member 8 in the seat width direction. The other end of the shaft portion 752 is held by the brake mechanism 751.

[0037] The pinion gear 753 is fixed to the shaft portion 752 and rotated by the shaft portion 752. The rotation axis of the pinion gear 753 is parallel to the seat width direction. The pinion gear 753 is disposed more inward in the seat width direction than the first side frame 41. The pinion gear 753 rotates on its own axis but does not move relative to the first side frame 41.

[0038] The first bolt 754A, the second bolt 754B, and the third bolt 754C pass through the first side frame 41 and the backing member 8 in the seat width direction, and are screwed into the first nut 9A, the second nut 9B, or the third nut 9C, respectively.

[0039] The operation bracket 76 is configured to input a driving force for raising and lowering the cushion frame 4 to the rotation mechanism 75. The operation bracket 76 is connected to an operation lever that is used by a seated person to perform a lift operation, for example.

[0040] (Backing material) The contact member 8 is a plate-shaped bracket fixed to the inner surface of the first side frame 41 in the seat width direction.

[0041] The contact member 8 is fastened to the first side frame 41 by a first bolt 754A, a second bolt 754B, and a third bolt 754C of the rotation mechanism 75, and a first nut 9A, a second nut 9B, and a third nut 9C arranged on the inner side of the contact member 8 in the seat width direction. The contact member 8 has a main body 81, a bearing 82, and a curved portion 83.

[0042] The main body 81 is a strip-shaped portion extending in the seat front-rear direction. A third bolt 754C disposed in the opening 713 of the first link 71 is inserted into the rear end of the main body 81. The main body 81 covers the entire pinion gear 753 and the portion of the sector gear portion 711 that meshes with the pinion gear 753 from the inside in the seat width direction.

[0043] The bearing 82 is an opening provided in the center of the main body 81. The bearing 82 holds the shaft portion 752 of the rotation mechanism 75. Specifically, the tip portion of the shaft portion 752 is rotatably inserted into the bearing 82.

[0044] The curved portion 83 is provided continuously from the front end of the main body 81. The curved portion 83 is fixed to the first side frame 41 at two locations, one above and one below. Specifically, a first bolt 754A is inserted into the upper end of the curved portion 83. Furthermore, a second bolt 754B is inserted into the lower end of the curved portion 83.

[0045] The curved portion 83 is curved so that the central portion in the up-down direction protrudes more inward in the seat width direction than the upper and lower ends (i.e., the fixed portions with the first side frame 41). Specifically, the curved portion 83 is curved so as to form a recess that does not interfere with the bead 412 of the first side frame 41.

[0046] <Bead> As shown in FIG. 5, the bead 412 of the first side frame 41 is provided so as to straddle a boundary 41C between an attachment region 41A of the plate portion 411 where the backing member 8 is overlapped and another region 41B.

[0047] The mounting region 41A has two fixing regions 41D to which the backing members 8 are fixed. One of the two fixing regions 41D is a fastening region between the first bolt 754A and the first nut 9A (i.e., the insertion hole of the first bolt 754A). The other of the two fixing regions 41D is a fastening region between the second bolt 754B and the second nut 9B (i.e., the insertion hole of the second bolt 754B).

[0048] The bead 412 extends along the seat front-rear direction (that is, the longitudinal direction of the plate portion 411). The bead 412 has a first extending portion 412A, an enlarged portion 412B, and a second extending portion 412C.

[0049] The first extending portion 412A constitutes the rear end of the bead 412. The second extending portion 412C constitutes the front end of the bead 412. The enlarged portion 412B connects the first extending portion 412A and the second extending portion 412C in the front-to-rear direction. The enlarged portion 412B has a length (i.e., width) greater in the direction perpendicular to the extension direction of the bead 412 than the first extending portion 412A and the second extending portion 412C.

[0050] The first extending portion 412A is sandwiched between the two fixing regions 41D in the width direction (i.e., the up-down direction) of the bead 412. The first extending portion 412A overlaps the front end edge of the backing member 8 in the seat width direction. The front end edge of the backing member 8 is part of the boundary 41C and extends in a direction intersecting the longitudinal direction of the plate portion 411 (i.e., the up-down direction).

[0051] First extending portion 412A rear The end portion is located behind the two fixed areas 41D. before The end portion and the expanded portion 412B are located in front of the boundary 41C.

[0052] Therefore, the bead 412 extends in the longitudinal direction of the plate portion 411 from the outside of the attachment region 41A, straddling the boundary 41C, to a position deeper than the two fixing regions 41D.

[0053] In addition, the first extending portion 412A rear The end of the bead 412 is located within the attachment region 41A. rear The end portion overlaps with the backing member 8 in the seat width direction. rear The end portion is located in front of the shaft portion 752 of the rotation mechanism 75 on the seat.

[0054] 6A, the bead 412 has a shape that protrudes toward the backing member 8. In other words, the bead 412 protrudes toward the inside in the seat width direction. In addition, a gap is provided between the bead 412 and the backing member 8.

[0055] In this embodiment, the backing member 8 is curved along the convex shape of the bead 412. However, as shown in Fig. 6B, the backing member 8 does not necessarily have to be curved along the convex shape of the bead 412. Furthermore, as shown in Fig. 6C, the backing member 8 may be curved in a tunnel shape that covers the bead 412.

[0056] [1-2.Effects] According to the embodiment described above in detail, the following effects can be obtained. (1a) The bead 412 reduces strain that propagates through the boundary 41C between the attachment region 41A and the other region 41B, thereby increasing the rigidity of the first side frame 41.

[0057] (1b) The bead 412 is sandwiched between the two fixing regions 41D in the width direction of the bead 412, which enhances the effect of reducing distortion at the boundary 41C.

[0058] (1c) The bead 412 extends in the longitudinal direction of the plate portion 411 from the outside of the mounting region 41A across the boundary 41C to a position deeper than the two fixing regions 41D, thereby enhancing the effect of reducing distortion by the bead 412.

[0059] (1d) Since the contact member 8 is a bracket having the bearing 82, the rigidity of the first side frame 41 to which the rotation mechanism 75 is attached can be increased. (1e) Since the rotation mechanism 75 is part of the lifter device 7, the rigidity of the cushion frame 4 to which the lifting mechanism is attached can be increased.

[0060] (1f) The bead 412 has a shape that is convex toward the contact member 8, so that interference between the bead 412 and the rotation mechanism 75 can be avoided and distortion at the boundary 41C can be reduced.

[0061] 2. Other Embodiments Although the embodiments of the present disclosure have been described above, it goes without saying that the present disclosure is not limited to the above-described embodiments and can take on various forms.

[0062] (2a) In the vehicle seat of the above embodiment, as shown in FIG. 7, the bead 412 may have a shape that is convex toward the side opposite to the pad member 8 (that is, toward the outside in the seat width direction).

[0063] (2b) In the vehicle seat of the above embodiment, the mounting area does not necessarily have to have two fixing areas, and therefore the bead of the frame does not necessarily have to be sandwiched between two fixing areas.

[0064] (2c) In the vehicle seat of the above embodiment, the lifter device may rotate the pinion gear using a power source. That is, an electric, hydraulic, or pneumatic actuator may be attached to the cushion frame as a rotation mechanism. In this case, the shaft of the actuator is inserted into the bearing of the backing member.

[0065] (2d) In the vehicle seat of the above embodiment, the pad member may be fixed to the cushion frame by means other than fastening. For example, the pad member may be fixed to the cushion frame by welding.

[0066] (2e) In the vehicle seat of the above embodiment, the pad member does not necessarily have to be fixed to a part of the cushion frame. For example, the pad member may be fixed to a part of the back frame having the plate portion and the bead.

[0067] (2f) In the vehicle seat of the above embodiment, the pad member does not necessarily have to have a bearing. For example, the pad member may be a bracket that reinforces the frame of the vehicle seat.

[0068] (2g) The vehicle seat of the above embodiment can also be applied to seats used in automobiles other than passenger cars, and seats used in vehicles other than automobiles, such as railway cars, ships, and aircraft.

[0069] (2h) The function of one component in the above embodiments may be distributed among multiple components, or the functions of multiple components may be integrated into one component. Also, part of the configuration of the above embodiments may be omitted. Furthermore, at least part of the configuration of the above embodiments may be added to or substituted for the configuration of another of the above embodiments. All aspects included in the technical idea identified by the wording of the claims are embodiments of the present disclosure. [Explanation of symbols]

[0070] 1...vehicle seat, 2...seat cushion, 3...seat back, 4... cushion frame, 5... back frame, 6A, 6B... slide device, 7... lifter device, 8... backing member, 9A, 9B, 9C... nuts, 41...first side frame, 41A...mounting area, 41B...other area, 41C...boundary, 41D...fixing region, 44, 45...rod, 71...first link, 72...second link, 73...third link, 74...fourth link, 75...rotation mechanism, 76...operation bracket, 81...main body, 82...bearing, 83...curved portion, 411...plate portion, 412...bead, 412A...first extension portion, 412B...expansion portion, 412C...second extension portion, 711...sector gear portion, 712...connection portion, 713...opening, 751...brake mechanism, 752...shaft portion, 753...pinion gear, 754A, 754B, 754C...bolts.

Claims

1. Seat cushion and Seat back and a frame supporting the seat cushion or the seat back; a backing member fixed to the frame; Equipped with The frame is A plate portion; a bead provided across a boundary between an attachment region where the backing member is overlapped and another region of the plate portion; and The bead is an extension portion that constitutes one of both end portions of the bead in the extension direction and that is located within the attachment region; an enlarged portion continuous with the extension portion in the extension direction of the bead; and The vehicle seat, wherein the expanded portion is greater than the extended portion in both the length in the extension direction of the bead and the length in the direction perpendicular to the extension direction of the bead.

2. Seat cushion and Seat back and a frame supporting the seat cushion or the seat back; a backing member fixed to the frame; Equipped with The frame is A plate portion; a bead provided across a boundary between an attachment region where the backing member is overlapped and another region of the plate portion; and The bead is a first extension portion that constitutes one of both end portions in the extension direction of the bead; a second extension portion that constitutes the other end of the two end portions; an expansion portion connecting the first extension portion and the second extension portion; and the second extending portion and the expanding portion are located within the other region, and the first extending portion extends from the other region to within the attachment region while straddling the boundary, The vehicle seat, wherein the expanded portion has a length in a direction perpendicular to the extension direction of the bead that is greater than the first extension portion and the second extension portion.

3. The vehicle seat according to claim 1 or 2, a rotation mechanism attached to the plate portion so as to sandwich the plate portion together with the backing member, the rotation mechanism has a shaft portion that penetrates the plate portion and rotates about an axis, The support member has a bearing that holds the shaft portion.

4. 4. The vehicle seat according to claim 3, the frame is a part of a cushion frame that supports the seat cushion, The vehicle seat, wherein the rotation mechanism is part of a mechanism that raises and lowers the cushion frame.

5. Seat cushion and Seat back and a frame supporting the seat cushion or the seat back; a backing member fixed to the frame; a rotation mechanism that is part of a mechanism for raising and lowering the cushion frame; Equipped with The frame is a part of a cushion frame that supports the seat cushion, a plate portion; and a bead having a convex shape, the bead being provided across a boundary between an attachment region where the backing member is overlapped and another region of the plate portion, The rotation mechanism includes: a shaft portion that penetrates the plate portion and rotates around an axis; attached to the plate portion so as to sandwich the plate portion together with the backing member, The backing member is a bearing for holding the shaft portion; The vehicle seat is curved so as to overlap the bead and be convex on the same side as the bead protruding.

6. The vehicle seat according to any one of claims 3 to 5, The bead has a shape that is convex toward the pad member.

7. The vehicle seat according to any one of claims 1 to 6, the attachment region has two fixing regions to which the backing member is fixed, The vehicle seat, wherein the bead is sandwiched between the two fixing regions in the width direction of the bead.

8. 8. The vehicle seat according to claim 7, The plate portion has a strip shape, The bead extends in the longitudinal direction of the plate portion from outside the mounting area to a position deeper than the two fixing areas while straddling the boundary.

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