US20190210497A1 - Seat frame - Google Patents

Seat frame Download PDF

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Publication number
US20190210497A1
US20190210497A1 US16/323,986 US201716323986A US2019210497A1 US 20190210497 A1 US20190210497 A1 US 20190210497A1 US 201716323986 A US201716323986 A US 201716323986A US 2019210497 A1 US2019210497 A1 US 2019210497A1
Authority
US
United States
Prior art keywords
seat
reinforcement
frame
reinforcement portion
cross member
Prior art date
Legal status (The legal status is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the status listed.)
Abandoned
Application number
US16/323,986
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English (en)
Inventor
Hiroshi Baba
Yuki HOSOKAWA
Takaya Kurisu
Current Assignee (The listed assignees may be inaccurate. Google has not performed a legal analysis and makes no representation or warranty as to the accuracy of the list.)
TS Tech Co Ltd
Original Assignee
TS Tech Co Ltd
Priority date (The priority date is an assumption and is not a legal conclusion. Google has not performed a legal analysis and makes no representation as to the accuracy of the date listed.)
Filing date
Publication date
Application filed by TS Tech Co Ltd filed Critical TS Tech Co Ltd
Assigned to TS TECH CO., LTD. reassignment TS TECH CO., LTD. ASSIGNMENT OF ASSIGNORS INTEREST (SEE DOCUMENT FOR DETAILS). Assignors: BABA, HIROSHI, HOSOKAWA, Yuki, KURISU, TAKAYA
Publication of US20190210497A1 publication Critical patent/US20190210497A1/en
Abandoned legal-status Critical Current

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Classifications

    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42727—Seats or parts thereof displaced during a crash involving substantially rigid displacement
    • B60N2/42745—Seats or parts thereof displaced during a crash involving substantially rigid displacement of the back-rest
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B60N2/682—Joining means
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/24—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles
    • B60N2/42—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles for particular purposes or particular vehicles the seat constructed to protect the occupant from the effect of abnormal g-forces, e.g. crash or safety seats
    • B60N2/427—Seats or parts thereof displaced during a crash
    • B60N2/42709—Seats or parts thereof displaced during a crash involving residual deformation or fracture of the structure
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/68—Seat frames
    • B60N2/686—Panel like structures
    • B—PERFORMING OPERATIONS; TRANSPORTING
    • B60—VEHICLES IN GENERAL
    • B60N—SEATS SPECIALLY ADAPTED FOR VEHICLES; VEHICLE PASSENGER ACCOMMODATION NOT OTHERWISE PROVIDED FOR
    • B60N2/00—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles
    • B60N2/80—Head-rests
    • B60N2/897—Head-rests with sleeves located in the back-rest for guiding the rods of the head-rest

Definitions

  • the present disclosure relates to a seat frame of a vehicle seat, and particularly relates to a seat frame configured so that the weight thereof can be reduced.
  • Weight reduction has been demanded for a seat frame forming a framework of a seat mounted on a conveyance such as an automobile.
  • a thin plate-shaped frame is used for a side frame forming a side portion of a seat frame, and in this manner, the weight of the frame is reduced.
  • Some frames are configured such that a cross member bridged between right and left sides is provided at an upper portion of a seat back frame. Weight reduction in such a cross member is also an issue.
  • the present disclosure has been made in view of the above-described problem, and an embodiment of the present disclosure provides a seat frame configured so that the weight of a cross member bridged between right and left sides of the seat frame can be reduced.
  • a seat frame of a vehicle seat which includes an upper frame forming an upper portion of a seat back frame and a cross member bridged at the upper frame.
  • the cross member includes right and left end portions in a seat width direction, the right and left end portions being fixed to the upper frame; and a first recessed portion that is recessed upward or downward and provided between the right and left end portions.
  • the weight of the cross member can be reduced as compared to the case of providing no recessed portion at the cross member.
  • the weight of the cross member bridged between right and left sides of the seat frame can be reduced.
  • the first recessed portion is preferably provided at a center portion of the cross member in the seat width direction.
  • the first recessed portion is provided at a position facing an occupant as described above, and therefore, a feeling of sitting on the seat can be improved.
  • a space where a member is arranged can be provided in the vicinity of the center portion of the cross member.
  • the cross member preferably includes a reinforcement portion formed at the first recessed portion.
  • the cross member preferably includes wide portions provided on right and left sides of the first recessed portion in the seat width direction, and the reinforcement portion is preferably formed across the first recessed portion and both of the wide portions. With this configuration, the stiffness of the cross member can be improved.
  • the cross member is preferably provided with a through-hole. With this configuration, the weight of the cross member can be further reduced.
  • the through-hole is preferably formed at each wide portion.
  • the through-hole is formed at the wide portion as described above, and therefore, a larger through-hole can be formed as compared to the case of forming the through-hole at the first recessed portion.
  • the weight of the cross member can be further reduced.
  • the through-hole is preferably formed at the reinforcement portion at each wide portion.
  • each wide portion is preferably curved to protrude backward.
  • the stiffness of the cross member can be improved.
  • the cross member can be formed in a shape matching the body shape of the occupant, and therefore, the feeling of sitting on the seat can be improved.
  • the seat frame preferably further includes a second recessed portion different from the first recessed portion, the second recessed portion being provided at least at one of an upper or lower end of the cross member.
  • the seat frame preferably further includes a flange portion provided at least at one of the upper or lower end of the cross member.
  • the flange portion is preferably formed at a position facing the first recessed portion in an upper-to-lower direction.
  • the weight of the cross member bridged between the right and left sides of the seat frame can be reduced.
  • the feeling of sitting on the seat can be improved.
  • lowering of the stiffness of the vicinity of the first recessed portion of the cross member can be suppressed.
  • the stiffness of the cross member can be improved.
  • a larger through-hole can be formed at the cross member.
  • weight reduction in the cross member can be realized, and lowering of the stiffness of the cross member can be suppressed.
  • the number of components forming the seat can be reduced.
  • FIG. 1 is a perspective view of a seat frame according to the present embodiment.
  • FIG. 2 is a left side view of a seat back frame.
  • FIG. 3A is an outer side view of a side frame.
  • FIG. 3B is a rear view of the side frame of FIG. 3A .
  • FIG. 3C is an inner side view of the side frame.
  • FIG. 4 is an enlarged partial view of the periphery of a second coupling bracket from a view point IV of FIG. 1 .
  • FIG. 5A is an outer side view of a first coupling bracket.
  • FIG. 5B is a rear view of the first coupling bracket of FIG. 5A .
  • FIG. 5C is an inner side view of the first coupling bracket of FIG. 5A .
  • FIG. 6A is an outer side view of the second coupling bracket of FIG. 4 .
  • FIG. 6B is a rear view of the second coupling bracket of FIG. 4 .
  • FIG. 6C is an inner side view of the second coupling bracket.
  • FIG. 7 is an enlarged partial view of a front side of the seat frame.
  • FIG. 8 is an enlarged partial view of a rear side of the seat frame.
  • FIG. 9 is a sectional view along an IX-IX line of FIG. 7 .
  • FIG. 10 is a sectional view along an X-X line of FIG. 7 .
  • FIG. 11 is an enlarged partial view from a view point XI of FIG. 7 .
  • FIG. 12A is a view of a variation of reinforcement portions provided at the side frame.
  • FIG. 12B is a view of another variation of the reinforcement portions provided at the side frame.
  • FIG. 12C is a view of still another variation of the reinforcement portions provided at the side frame.
  • FIG. 12D is a view of still another variation of the reinforcement portions provided at the side frame.
  • FIG. 13 is a view of an upper portion of a seat frame according to a second embodiment.
  • FIG. 14 is a sectional view along an XIV-XIV line of FIG. 13 .
  • FIG. 15 is a sectional view along an XV-XV line of FIG. 13 .
  • FIG. 16 is a sectional view along an XVI-XVI line of FIG. 13 .
  • FIG. 17 is a sectional view along an XVII-XVII line of FIG. 13 .
  • FIG. 18 is a view for describing a state in which a blower and stop members are attached to a seat back frame according to the second embodiment.
  • a seat frame 1 according to an embodiment (hereinafter referred to as a “present embodiment”) of the present disclosure is described with reference to FIGS. 1 to 18 .
  • the seat frame 1 forms a framework of a vehicle seat mounted on a vehicle.
  • the embodiments described below are set forth merely as examples for the sake of easy understanding of the present disclosure, and are not intended to limit the embodiments. That is, changes and modifications can be made to the shapes, dimensions, arrangements, etc. of members described below without departing from the gist of the present disclosure, and needless to say, the invention includes equivalents thereof.
  • a “front-to-rear direction” means a front-to-rear direction as viewed from a seated person on the vehicle seat, and is a direction coincident with a traveling direction of the vehicle.
  • a “seat width direction” means a horizontal width direction of the vehicle seat, and is coincident with a right-to-left direction as viewed from the seated person on the vehicle seat.
  • an “upper-to-lower direction” means a height direction of the vehicle seat, and is coincident with an upper-to-lower direction when the vehicle seat is viewed from the front.
  • the seat frame 1 mainly includes a seat back frame 10 and a seat cushion frame 20 .
  • the seat back frame 10 forms a framework of a backrest portion of the seat frame 1
  • the seat cushion frame 20 forms a framework of a seating portion of the seat frame 1 .
  • the seat back frame 10 includes an inverted U-shaped upper frame 11 , a pair of side frames 12 forming right and left end portions in the seat width direction, and a lower frame 13 coupling lower end portions of the pair of side frames 12 .
  • the upper frame 11 is welded to the side frames 12 at upper frame side portions 11 A forming both lower portions of the upper frame 11 .
  • headrest attachment portions 17 are, by welding, attached to an upper end of the upper frame 11 .
  • the headrest attachment portions 17 are tubular bodies into which two headrest stays hanging down from a not-shown headrest are inserted.
  • a cross member 14 is bridged between both end portions of the upper frame 11 above the upper frame side portions 11 A.
  • Right and left end portions 14 B of the cross member 14 are welded and fixed to right and left bent portions of the upper frame 11 .
  • the bent portion of the upper frame 11 is a portion of the upper frame 11 coupling a portion attached to the headrest attachment portion 17 and a portion attached to the side frame 12 .
  • a recessed portion 14 A recessed upward of the seat is formed between the right and left end portions 14 B of the cross member 14 .
  • the recessed portion 14 A is formed at a center portion of the cross member 14 in the seat width direction. In other words, the recessed portion 14 A is provided between the right and left headrest attachment portions 17 .
  • the recessed portion 14 A is formed at the cross member 14 of the seat frame 1 , and in this manner, the weight of the seat frame 1 is reduced.
  • the recessed portion 14 A is formed at a lower end of the cross member 14 , but may be formed at an upper end. In the case of forming the recessed portion 14 A at the upper end, the recessed portion 14 A is a portion recessed downward of the seat. Alternatively, the recessed portion 14 A may be formed at each of the upper and lower ends of the cross member 14 .
  • a rotary shaft 16 for reclining units 40 is attached between the lower end portions of the right and left side frames 12 with the rotary shaft 16 penetrating the right and left side frames 12 .
  • a reclining operation section is operated to operate the reclining units 40 , and in this manner, the angle of the seat back frame 10 with respect to the seat cushion frame 20 can be adjusted.
  • a pressure receiving member 15 configured to receive a load from an occupant is bridged at a center portion of the seat back frame 10 .
  • the pressure receiving member 15 described herein includes a support portion 15 A, a wire 15 B, and wires 15 C.
  • the support portion 15 A is configured to support the back of the occupant, and includes an elastic member such as a plate spring or an S-spring, for example.
  • a surface of the support portion 15 A at the front of the seat is referred to as a “support surface.”
  • the wire 15 B is stopped at the support portion 15 A and a front wall portion 13 B of the lower frame 13 .
  • the wire 15 B is stopped at the front wall portion 13 B of the lower frame 13 by means of clips 50 fitted in through-holes formed at the front wall portion 13 B.
  • the wires 15 C are stopped at side portions of the support portion 15 A and the side frames 12 .
  • the support portion 15 A is fixed to the seat back frame 10 with the wire 15 B and the wires 15 C.
  • the seat cushion frame 20 is described. As illustrated in FIG. 1 , the seat cushion frame 20 is in an outer square frame shape as viewed from above. Moreover, the seat cushion frame 20 includes, as main components, cushion side frames 22 A, 22 B each formed at right and left end portions in the seat width direction, a pan frame 21 forming a front end portion of the seat cushion frame 20 , and a coupling pipe 23 coupling the right and left cushion side frames 22 A, 22 B.
  • the coupling pipe 23 is a hollow member such as a round pipe, and a rear end of a pressure receiving member 24 configured to support the buttocks of the occupant is attached to the coupling pipe 23 .
  • a first coupling bracket 18 is attached to an upper portion of a rear end portion of the left cushion side frame 22 A. Moreover, the left side frame 12 is coupled to the first coupling bracket 18 via the reclining unit 40 . Moreover, as illustrated in FIG. 4 , a second coupling bracket 19 is attached to an upper portion of a rear end portion of the right cushion side frame 22 B. Moreover, the right side frame 12 is coupled to the second coupling bracket 19 via the reclining unit 40 . Note that details of configurations of the first coupling bracket 18 and the second coupling bracket 19 are described below.
  • FIG. 2 is a left side view of the seat back frame 10 .
  • FIG. 3A is an outer side view of the side frame 12
  • FIG. 3B is a rear view of the side frame 12
  • FIG. 3C is an inner side view of the side frame 12 .
  • a side frame side portion 12 A forming a side portion of the side frame 12 is provided with multiple through-holes including an airbag attachment hole 31 A, an airbag attachment hole 31 B, an airbag attachment hole 31 C, and a through-hole 31 D.
  • the airbag attachment hole 31 A, the airbag attachment hole 31 B, and the airbag attachment hole 31 C are through-holes used for attachment of an airbag unit.
  • the airbag unit described herein includes an airbag body, webbing configured to guide an airbag in a deploying direction thereof, and an airbag attachment plate, for example.
  • the airbag attachment hole 31 B and the airbag attachment hole 31 C are holes for attachment of the webbing of the airbag
  • the airbag attachment hole 31 A is a hole into which a bolt extending from a retainer of the airbag body is inserted.
  • the through-hole 31 D is formed at a position facing a lower end of the upper frame side portion 11 A, and the side frame 12 and the upper frame 11 are welded to each other at the through-hole 31 D.
  • a first reinforcement portion 30 A extending along a rear edge 12 C of the side frame side portion 12 A forming the side portion of the side frame 12 is formed at the side frame side portion 12 A.
  • the rear edge 12 C is a bent portion as a boundary between the side frame side portion 12 A forming a side surface of the side frame 12 and a side frame rear portion 12 B forming a rear surface of the side frame 12 .
  • the first reinforcement portion 30 A is, for example, configured as a bead portion formed in such a manner that part of the side frame side portion 12 A is recessed inward of the seat by pressing.
  • the first reinforcement portion 30 A described herein is provided at least at a wide portion 12 D having the greatest width at the side frame side portion 12 A.
  • the first reinforcement portion 30 A is provided along the rear edge 12 C from a position facing the through-hole 31 D to a position facing the airbag attachment hole 31 C in the upper-to-lower direction. That is, the first reinforcement portion 30 A is provided at least at a position at which the side frame 12 and the upper frame side portion 11 A overlap with each other, and therefore, the strength of a joint portion between the side frame 12 and the upper frame 11 can be enhanced.
  • an upper end of the first reinforcement portion 30 A may be positioned above the position of welding between the side frame 12 and the upper frame 11 .
  • the first reinforcement portion 30 A is provided at such a position that the first reinforcement portion 30 A overlaps with the upper frame 11 and the cushion side frames 22 A, 22 B in the upper-to-lower direction as viewed laterally.
  • a second reinforcement portion 30 B extending forward of the seat from a portion between upper and lower ends of the first reinforcement portion 30 A is formed at the side frame side portion 12 A forming the side portion of the side frame 12 .
  • the second reinforcement portion 30 B is configured as a bead portion formed in such a manner that part of the side frame side portion 12 A is recessed inward of the seat by pressing.
  • the second reinforcement portion 30 B described herein is formed between the airbag attachment hole 31 A and the airbag attachment hole 31 B.
  • a rear end of the second reinforcement portion 30 B is connected to the first reinforcement portion 30 A, and the second reinforcement portion 30 B and the first reinforcement portion 30 A are integrated.
  • a front end of the second reinforcement portion 30 B is positioned forward of the seat with respect to the airbag attachment hole 31 B, and is positioned backward of the seat with respect to a front edge of the side frame side portion 12 A.
  • a third reinforcement portion 30 C extending forward of the seat from the lower end of the first reinforcement portion 30 A is formed at the side frame side portion 12 A forming the side portion of the side frame 12 .
  • the third reinforcement portion 30 C is configured as a bead portion formed in such a manner that part of the side frame side portion 12 A is recessed inward of the seat by pressing.
  • the third reinforcement portion 30 C described herein is formed between the airbag attachment hole 31 A and the airbag attachment hole 31 C.
  • a rear end of the third reinforcement portion 30 C is connected to the first reinforcement portion 30 A, and the third reinforcement portion 30 C and the first reinforcement portion 30 A are integrated.
  • a front end of the third reinforcement portion 30 C is positioned forward of the seat with respect to the airbag attachment hole 31 C, and is positioned backward of the seat with respect to the front edge of the side frame side portion 12 A.
  • FIG. 2 also illustrates a vertical line V at a position overlapping with a rear end of the third reinforcement portion 30 C. As illustrated in FIG. 2 , the rear end of the third reinforcement portion 30 C is provided forward of the cross member 14 . In other words, the cross member 14 is provided at the rear of the third reinforcement portion 30 C.
  • the second reinforcement portion 30 B extends from the first reinforcement portion 30 A at an angle (i.e., a substantially right angle) substantially perpendicular to a torso line T indicating the axis of a body of a three-dimensional mannequin (not shown) representing the occupant seating on the vehicle seat including the seat frame 1 as the framework.
  • the third reinforcement portion 30 C extends from the first reinforcement portion 30 A at an angle (i.e., an acute angle) not perpendicular to the torso line T. That is, the second reinforcement portion 30 B and the third reinforcement portion 30 C are different from each other in the angle of extension from the first reinforcement portion 30 A.
  • each of the first reinforcement portion 30 A, the second reinforcement portion 30 B, and the third reinforcement portion 30 C is, in the upper-to-lower direction, provided above the reclining unit 40 .
  • Bottom portions (i.e., bottom portions of the beads) of the first reinforcement portion 30 A, the second reinforcement portion 30 B, and the third reinforcement portion 30 C inside the seat are positioned outward of the seat with respect to an end portion of a flange provided at the front of the side frame 12 .
  • An upper end portion of the first reinforcement portion 30 A may be narrowed as compared to a lower end portion thereof.
  • Front end portions of the second reinforcement portion 30 B and the third reinforcement portion 30 C may be narrowed as compared to rear portions thereof.
  • the front end portions of the second reinforcement portion 30 B and the third reinforcement portion 30 C may be positioned forward of the front wall portion 13 B of the lower frame 13 , the support portion 15 A of the pressure receiving member 15 , attachment portions of the reclining units 40 , the headrest attachment portions 17 , and the rotary shaft 16 . Any of the first reinforcement portion 30 A, the second reinforcement portion 30 B, and the third reinforcement portion 30 C may be positioned forward of the headrest attachment portions 17 .
  • a rear reinforcement portion 30 D is formed at a center portion of the side frame rear portion 12 B of the side frame 12 .
  • a through-hole 31 E and a through-hole 31 F are each formed at upper and lower portions of the side frame rear portion 12 B.
  • the rear reinforcement portion 30 D is configured as a bead portion formed in such a manner that part of the side frame rear portion 12 B is recessed inward of the seat by pressing.
  • the rear reinforcement portion 30 D extends from a position facing the upper end of the first reinforcement portion 30 A to a position below the lower end of the first reinforcement portion 30 A.
  • the rear reinforcement portion 30 D is formed such that an upper end of the rear reinforcement portion 30 D is positioned above the through-hole 31 E formed at the side frame rear portion 12 B and a lower end of the rear reinforcement portion 30 D is positioned below the through-hole 31 F formed at the side frame rear portion 12 B.
  • a center portion of the rear reinforcement portion 30 D positioned between the through-hole 31 E and the through-hole 31 F is a wide portion that is wider than the upper and lower ends.
  • the lower end of the rear reinforcement portion 30 D is at a position overlapping with the lower frame 13 in the upper-to-lower direction.
  • the rear reinforcement portion 30 D is formed at the side frame rear portion 12 B so that the strength of the side frame rear portion 12 B can be enhanced across a broad area.
  • an integrated inverted F-shaped bead portion of the first reinforcement portion 30 A, the second reinforcement portion 30 B, and the third reinforcement portion 30 C is provided at the side frame side portion 12 A of the side frame 12 .
  • the strength of the side frame side portion 12 A can be improved in a balanced manner across a broad area.
  • the first reinforcement portion 30 A is provided along the rear edge 12 C so that the strength of the rear edge 12 C can be enhanced.
  • the first reinforcement portion 30 A is provided at least at the wide portion 12 D of the side frame side portion 12 A, and therefore, the strength of the wide portion 12 D can be enhanced even in the case of forming various through-holes for attaching components such as the airbag to the wide portion 12 D.
  • the airbag attachment hole 31 A is formed at a position sandwiched in the upper-to-lower direction by the second reinforcement portion 30 B and the third reinforcement portion 30 C, and therefore, the strength of the periphery of the airbag attachment hole 31 A can be enhanced.
  • the second reinforcement portion 30 B is provided between the airbag attachment hole 31 A and the airbag attachment hole 31 B, and therefore, the strength of the periphery of the airbag attachment hole 31 A and the airbag attachment hole 31 B can be enhanced.
  • the third reinforcement portion 30 C is provided between the airbag attachment hole 31 A and the airbag attachment hole 31 C, and therefore, the strength of the periphery of the airbag attachment hole 31 A and the airbag attachment hole 31 C can be enhanced.
  • FIG. 4 is an enlarged partial view of the periphery of the second coupling bracket 19 from a view point IV of FIG. 1 .
  • FIGS. 5A, 5B, and 5C each correspond to an outer side view, a rear view, and an inner side view of the first coupling bracket 18 .
  • FIGS. 6 A, 6 B, and 6 C each correspond to an outer side view, a rear view, and an inner side view of the second coupling bracket 19 .
  • the first coupling bracket 18 includes a weak portion 18 A, a shaft through-hole 18 B, a bolt fastening hole 18 C, and a bolt fastening hole 18 D.
  • the weak portion 18 A is a portion provided between the shaft through-hole 18 B and the bolt fastening hole 18 D and bent outward of the seat.
  • the first coupling bracket 18 is easily deformable at the weak portion 18 A.
  • the rotary shaft 16 is inserted into the shaft through-hole 18 B, and the left reclining unit 40 is attached to the shaft through-hole 18 B.
  • the left side frame 12 is coupled to the first coupling bracket 18 via the left reclining unit 40 .
  • the left cushion side frame 22 A is fixed to the bolt fastening hole 18 C and the bolt fastening hole 18 D with fastening tools such as bolts and nuts.
  • fastening tools such as bolts and nuts.
  • the weak portion 18 A of the first coupling bracket 18 deforms to absorb impact.
  • the second coupling bracket 19 includes a weak portion 19 A, a shaft through-hole 19 B, a bolt fastening hole 19 C, a bolt fastening hole 19 D, and a weak portion 19 E.
  • the weak portion 19 A is a portion provided between the shaft through-hole 19 B and the bolt fastening hole 19 D and bent outward of the seat.
  • the second coupling bracket 19 is easily deformable at the weak portion 19 A.
  • the rotary shaft 16 is inserted into the shaft through-hole 19 B, and the right reclining unit 40 is attached to the shaft through-hole 19 B.
  • the right side frame 12 is coupled to the second coupling bracket 19 via the right reclining unit 40 .
  • the right cushion side frame 22 B is fixed to the bolt fastening hole 19 C and the bolt fastening hole 19 D via fastening tools such as bolts and nuts.
  • the weak portion 19 E is a portion provided between the shaft through-hole 19 B and the bolt fastening hole 19 C and bent outward of the seat.
  • the second coupling bracket 19 is easily deformable at the weak portion 19 E. For example, upon rear collision of the vehicle, the weak portion 19 A and the weak portion 19 E of the second coupling bracket 19 deform to absorb impact.
  • a first connection portion with a shaft through-hole 18 B side and a second connection portion with a bolt fastening hole 18 D side are at the substantially same position in the seat width direction. That is, at the first coupling bracket 18 , the first connection portion and the second connection portion are not offset from each other in the seat width direction.
  • a second connection portion with a bolt fastening hole 19 D side is, in the seat width direction, positioned inward of the seat with respect to a first connection portion with a shaft through-hole 19 B side.
  • the first connection portion and the second connection portion are offset from each other in the seat width direction.
  • no weak portion is provided between the shaft through-hole 18 B and the bolt fastening hole 18 C.
  • the weak portion 19 E is provided between the shaft through-hole 19 B and the bolt fastening hole 19 C.
  • the weak portion is provided unsymmetrically between the first coupling bracket 18 and the second coupling bracket 19 , and therefore, ease of deformation upon load input to the seat frame 1 is differentiated.
  • a height adjustment unit 41 is provided at the left cushion side frame 22 A, and a similar component is not provided at the right cushion side frame 22 B.
  • a greater load is, upon rear collision, input to the first coupling bracket 18 coupled to the left cushion side frame 22 A as compared to the second coupling bracket 19 coupled to the right cushion side frame 22 B.
  • the weak portion is provided unsymmetrically between the first coupling bracket 18 and the second coupling bracket 19 as described above, and the second coupling bracket 19 is configured more easily deformable than the first coupling bracket 18 .
  • deformation of the first coupling bracket 18 and the second coupling bracket 19 can be adjusted to the same level.
  • FIG. 7 is a front view of the seat frame 1 , and is an enlarged partial view of the periphery of the lower frame 13 .
  • FIG. 8 is a rear view of the seat frame 1 , and is an enlarged partial view of the periphery of the lower frame 13 .
  • FIG. 9 is an IX-IX sectional view of FIG. 7
  • FIG. 10 is an X-X sectional view of FIG. 7 .
  • FIG. 11 is a view from an arrow of a view point XI of FIG. 7 , and is an enlarged partial view of the lower frame 13 .
  • the lower frame 13 includes a rear wall portion 13 A forming a seat rear portion and having a J-shaped section, and the front wall portion 13 B formed continuously to a front end of the rear wall portion 13 A and forming a seat front portion.
  • the front wall portion 13 B of the lower frame 13 is a portion formed in such a manner that a seat width portion facing the support portion 15 A is extended upward of the front end of the rear wall portion 13 A.
  • the wire 15 B attached, at a lower end thereof, to three clips 50 is attached to the support portion 15 A.
  • attachment portions 51 as through-holes in which the clips 50 are to be fitted are formed at three spots at the front wall portion 13 B. As illustrated in FIG. 7 , the attachment portions 51 are provided apart from the support portion 15 A below the support portion 15 A.
  • the attachment portions 51 are provided inward of ends of the support portion 15 A in the right-to-left direction.
  • the clips 50 attached to the wire 15 B are fitted in the attachment portions 51 of the front wall portion 13 B, and in this manner, the wire 15 B is fixed to the front wall portion 13 B.
  • an upper reinforcement portion 60 A, an upper reinforcement portion 60 B, and an upper reinforcement portion 60 C extending in the seat width direction are formed above the attachment portion 51 of each clip 50 at the front wall portion 13 B.
  • the upper reinforcement portion 60 A, the upper reinforcement portion 60 B, and the upper reinforcement portion 60 C are formed on the substantially same horizontal plane.
  • the upper reinforcement portion 60 A is provided on the left side
  • the upper reinforcement portion 60 B is provided at the center
  • the upper reinforcement portion 60 C is provided on the right side.
  • the upper reinforcement portion 60 A, the upper reinforcement portion 60 B, and the upper reinforcement portion 60 C are formed as bead portions formed in such a manner that part of the front wall portion 13 B is recessed backward of the seat by pressing.
  • the upper reinforcement portion 60 A, the upper reinforcement portion 60 B, and the upper reinforcement portion 60 C are formed in shapes along an upper edge of the front wall portion 13 B. That is, the upper edge of the front wall portion 13 B is in a linear shape at the center and in an arc shape at right and left end portions. Accordingly, a left end portion of the upper reinforcement portion 60 A is formed in an arc shape, and other portions of the upper reinforcement portion 60 A are formed in a linear shape.
  • the upper reinforcement portion 60 B is formed in a linear shape.
  • a right end portion of the upper reinforcement portion 60 C is formed in an arc shape, and other portions of the upper reinforcement portion 60 C are formed in a linear shape.
  • the position of the left end portion of the upper reinforcement portion 60 A is on the outside of the opposing attachment portion 51 in the seat width direction.
  • the position of the right end portion of the upper reinforcement portion 60 C is on the outside of the opposing attachment portion 51 in the seat width direction.
  • a lower reinforcement portion 61 A and a lower reinforcement portion 61 B apart from each other are formed below the attachment portion 51 facing the upper reinforcement portion 60 A at a boundary portion between the front wall portion 13 B and the rear wall portion 13 A.
  • the lower reinforcement portion 61 A and the lower reinforcement portion 61 B are formed as bead portions formed in such a manner that the boundary portion between the front wall portion 13 B and the rear wall portion 13 A is recessed backward of the seat by pressing.
  • the attachment portion 51 facing the upper reinforcement portion 60 A is, in the seat upper-to-lower direction, provided between the upper reinforcement portion 60 A and each of the lower reinforcement portion 61 A and the lower reinforcement portion 61 B.
  • the position of the left end portion of the upper reinforcement portion 60 A is on the outside of the lower reinforcement portion 61 A in the seat width direction.
  • the position of a right end portion of the upper reinforcement portion 60 A is on the outside of the lower reinforcement portion 61 B in the seat width direction. That is, the lower reinforcement portion 61 A and the lower reinforcement portion 61 B are, in the seat width direction, formed inward of the upper reinforcement portion 60 A provided above the lower reinforcement portion 61 A and the lower reinforcement portion 61 B.
  • a spacing between the lower reinforcement portion 61 A and the lower reinforcement portion 61 B is shorter than the length of the upper reinforcement portion 60 A in the width direction.
  • a lower reinforcement portion 61 C and a lower reinforcement portion 61 D apart from each other are formed below the attachment portion 51 facing the upper reinforcement portion 60 B at the boundary portion between the front wall portion 13 B and the rear wall portion 13 A.
  • the lower reinforcement portion 61 C and the lower reinforcement portion 61 D are formed as bead portions formed in such a manner that the boundary portion between the front wall portion 13 B and the rear wall portion 13 A is recessed backward of the seat by pressing.
  • the attachment portion 51 facing the upper reinforcement portion 60 B is, in the seat upper-to-lower direction, provided between the upper reinforcement portion 60 B and each of the lower reinforcement portion 61 C and the lower reinforcement portion 61 D.
  • the attachment portion 51 facing the upper reinforcement portion 60 B is, in the seat width direction, provided between the lower reinforcement portion 61 C and the lower reinforcement portion 61 D.
  • the position of a left end portion of the upper reinforcement portion 60 B is on the outside of the lower reinforcement portion 61 C in the seat width direction.
  • the position of a right end portion of the upper reinforcement portion 60 B is on the outside of the lower reinforcement portion 61 D in the seat width direction. That is, the lower reinforcement portion 61 C and the lower reinforcement portion 61 D are, in the seat width direction, formed inside the upper reinforcement portion 60 B provided above the lower reinforcement portion 61 C and the lower reinforcement portion 61 D.
  • a spacing between the lower reinforcement portion 61 C and the lower reinforcement portion 61 D is shorter than the length of the upper reinforcement portion 60 B in the width direction.
  • a lower reinforcement portion 61 E and a lower reinforcement portion 61 F apart from each other are formed below the attachment portion 51 facing the upper reinforcement portion 60 C at the boundary portion between the front wall portion 13 B and the rear wall portion 13 A.
  • the lower reinforcement portion 61 E and the lower reinforcement portion 61 F are formed as bead portions formed in such a manner that the boundary portion between the front wall portion 13 B and the rear wall portion 13 A is recessed backward of the seat by pressing.
  • the attachment portion 51 facing the upper reinforcement portion 60 C is, in the seat upper-to-lower direction, provided between the upper reinforcement portion 60 C and each of the lower reinforcement portion 61 E and the lower reinforcement portion 61 F.
  • the position of a left end portion of the upper reinforcement portion 60 C is on the outside of the lower reinforcement portion 61 E in the seat width direction.
  • the position of the right end portion of the upper reinforcement portion 60 C is on the outside of the lower reinforcement portion 61 F in the seat width direction. That is, the lower reinforcement portion 61 E and the lower reinforcement portion 61 F are, in the seat width direction, formed inside the upper reinforcement portion 60 C provided above the lower reinforcement portion 61 E and the lower reinforcement portion 61 F.
  • a spacing between the lower reinforcement portion 61 E and the lower reinforcement portion 61 F is shorter than the length of the upper reinforcement portion 60 C in the width direction.
  • a spacing between the upper reinforcement portion 60 A and the upper reinforcement portion 60 B adjacent to each other on the upper side is shorter than a spacing between the lower reinforcement portion 61 B and the lower reinforcement portion 61 C adjacent to each other on the lower side.
  • a spacing between the upper reinforcement portion 60 B and the upper reinforcement portion 60 C adjacent to each other on the upper side is shorter than a spacing between the lower reinforcement portion 61 D and the lower reinforcement portion 61 E adjacent to each other on the lower side.
  • the process of attaching the pressure receiving member 15 is not easy because the rotary shaft 16 is provided between the rear wall portion 13 A and the front wall portion 13 B and there is not sufficient space.
  • the attachment portions 51 for attaching the wire 15 B of the pressure receiving member 15 are provided at the front wall portion 13 B of the lower frame 13 , and therefore, the rotary shaft 16 and an engineer's hand (not shown) do not contact each other.
  • workability in attachment of the pressure receiving member 15 can be improved.
  • FIG. 9 a configuration of the rear wall portion 13 A of the lower frame 13 is mainly described.
  • an upper end of the rear wall portion 13 A is positioned above an upper end of the front wall portion 13 B.
  • a lower end of the support portion 15 A is positioned above the upper end of the front wall portion 13 B and below the upper end of the rear wall portion 13 A.
  • the front wall portion 13 B is provided substantially parallel to the support portion 15 A.
  • the support portion 15 A is substantially parallel to the torso line T, and in other words, the front wall portion 13 B is provided substantially parallel to the torso line T.
  • upwardly-protruding portions 75 protruding upward are each provided at both upper outer portions of the rear wall portion 13 A in the seat width direction.
  • the upwardly-protruding portion 75 is formed in a shape along the side frame 12
  • a reinforcement portion 74 is formed at a position facing the rear reinforcement portion 30 D of the side frame 12 .
  • the reinforcement portion 74 is formed as a bead portion recessed forward of the seat, and is in a shape engageable with the rear reinforcement portion 30 D.
  • both side portions of the rear wall portion 13 A in the seat width direction are joined to the side frames 12 by welding.
  • the first reinforcement portion 30 A, the second reinforcement portion 30 B, and the third reinforcement portion 30 C are provided at the side frame side portion 12 A of the side frame 12 , and therefore, the stiffness of the side frame 12 can be improved.
  • the first reinforcement portion 30 A, the second reinforcement portion 30 B, and the third reinforcement portion 30 C described herein are different from each other in an extension direction, and therefore, the stiffness against load input from various directions can be improved.
  • the attachment portions 51 of the pressure receiving member 15 are provided at the front wall portion 13 B of the lower frame 13 , and therefore, the workability in attachment of the pressure receiving member 15 can be improved.
  • the reinforcement portions are provided on the upper and lower sides of the attachment portions 51 at the front wall portion 13 B, and therefore, the stiffness of the periphery of the attachment portions 51 can be improved.
  • FIGS. 12A to 12D each illustrate outer side views of the side frames 12 according to the variations.
  • the side frame 12 according to a first variation includes a reinforcement portion 80 A, a reinforcement portion 80 B, a reinforcement portion 80 C, a reinforcement portion 80 D, and a reinforcement portion 80 E.
  • Each of the reinforcement portion 80 A, the reinforcement portion 80 B, the reinforcement portion 80 C, the reinforcement portion 80 D, and the reinforcement portion 80 E described herein is formed as a bead portion formed in such a manner that the side frame side portion 12 A is recessed inward of the seat by pressing.
  • the reinforcement portion 80 A is provided along the rear edge 12 C of the side frame side portion 12 A.
  • the reinforcement portion 80 B is provided to extend in the seat front-to-rear direction between the airbag attachment hole 31 A and the airbag attachment hole 31 B.
  • the reinforcement portion 80 C is provided to extend in the seat front-to-rear direction between the airbag attachment hole 31 A and the airbag attachment hole 31 C.
  • the reinforcement portion 80 D is provided to extend in the seat front-to-rear direction below the airbag attachment hole 31 C.
  • the reinforcement portion 80 E is provided along the front edge of the side frame side portion 12 A above the airbag attachment hole 31 B.
  • any of the reinforcement portion 80 A, the reinforcement portion 80 B, the reinforcement portion 80 C, the reinforcement portion 80 D, and the reinforcement portion 80 E is not necessarily coupled to other reinforcement portions, and may be provided as independent bead portions. Moreover, the reinforcement portion 80 A, the reinforcement portion 80 B, the reinforcement portion 80 C, the reinforcement portion 80 D, and the reinforcement portion 80 E may be different from each other in their respective extension directions.
  • the side frame 12 according to a second variation includes a reinforcement portion 81 A, a reinforcement portion 81 B, and a reinforcement portion 81 C.
  • Each of the reinforcement portion 81 A, the reinforcement portion 81 B, and the reinforcement portion 81 C described herein is formed as a bead portion formed in such a manner that the side frame side portion 12 A is recessed inward of the seat by pressing.
  • the reinforcement portion 81 A is provided along the rear edge 12 C of the side frame side portion 12 A. Note that a lower end of the reinforcement portion 81 A is curved inward of the seat.
  • the reinforcement portion 81 B is provided to extend in the seat front-to-rear direction between the airbag attachment hole 31 A and the airbag attachment hole 31 B. Moreover, a rear end of the reinforcement portion 81 B is coupled to the reinforcement portion 81 A.
  • the reinforcement portion 81 C is provided along the front edge of the side frame side portion 12 A above the airbag attachment hole 31 B.
  • the side frame 12 according to a third variation includes a reinforcement portion 82 A, a reinforcement portion 82 B, a reinforcement portion 82 C, and a reinforcement portion 82 D.
  • Each of the reinforcement portion 82 A, the reinforcement portion 82 B, the reinforcement portion 82 C, and the reinforcement portion 82 D described herein is formed as a bead portion formed in such a manner that the side frame side portion 12 A is recessed inward of the seat by pressing.
  • the reinforcement portion 82 A is provided along the rear edge 12 C of the side frame side portion 12 A. Note that a lower end of the reinforcement portion 82 A is bent inward of the seat.
  • the reinforcement portion 82 B is provided to extend in the seat front-to-rear direction between the airbag attachment hole 31 A and the airbag attachment hole 31 B. Moreover, a rear end of the reinforcement portion 82 B is coupled to the reinforcement portion 82 A.
  • the reinforcement portion 82 C is provided to extend in the seat front-to-rear direction from a bent portion of the reinforcement portion 82 A to the airbag attachment hole 31 C. Moreover, a rear end of the reinforcement portion 82 C is coupled to the reinforcement portion 82 A.
  • the reinforcement portion 82 D is provided along the front edge of the side frame side portion 12 A above the airbag attachment hole 31 B.
  • the side frame 12 according to the fourth variation includes a reinforcement portion 83 A, a reinforcement portion 83 B, and a reinforcement portion 83 C.
  • Each of the reinforcement portion 83 A, the reinforcement portion 83 B, and the reinforcement portion 83 C described herein is formed as a bead portion formed in such a manner that the side frame side portion 12 A is recessed inward of the seat by pressing.
  • the reinforcement portion 83 A is provided along the rear edge 12 C of the side frame side portion 12 A.
  • the reinforcement portion 83 B is formed in an annular ring shape, and at a rear end portion thereof, is coupled to the reinforcement portion 83 A.
  • the reinforcement portion 83 B is formed among the airbag attachment hole 31 A, the airbag attachment hole 31 B, and the airbag attachment hole 31 C, and includes the airbag attachment hole 31 A.
  • the reinforcement portion 83 C is provided along the front edge of the side frame side portion 12 A above the airbag attachment hole 31 B.
  • a seat frame 1 according to a second embodiment is described with reference to FIGS. 13 to 18 .
  • a cross member 100 bridged at an upper frame 11 is different from the cross member 14 illustrated in FIG. 1 as described below, but other points are common to the first and second embodiments.
  • a configuration of the cross member 100 is described below.
  • the cross member 100 extending in the seat width direction is bridged between right and left bent portions of the upper frame 11 .
  • Right and left end portions 103 of the cross member 100 are welded and fixed to the right and left bent portions of the upper frame 11 .
  • a first recessed portion 101 recessed downward is formed between the right and left end portions 103 .
  • the first recessed portion 101 is in a shape recessed upward between the right and left end portions 103 .
  • the first recessed portion 101 is provided at a center portion of the cross member 100 in the seat width direction. Note that the center portion of the cross member 100 in the seat width direction is between right and left headrest attachment portions 17 .
  • the cross member 100 has wide portions 105 on the right and left sides of the first recessed portion 101 in the seat width direction.
  • the wide portion 105 is configured such that the width thereof in the upper-to-lower direction is greater than that of the first recessed portion 101 .
  • the cross member 100 is in a symmetrical shape with respect to the first recessed portion 101 in the right-to-left direction. That is, the shapes of the right and left wide portions 105 are symmetrical in the right-to-left direction.
  • the wide portion 105 is curved to protrude backward of the seat. Specifically, an outer portion of the wide portion 105 in the seat width direction is curved in a shape protruding backward of the seat.
  • a reinforcement portion 104 is formed at a center portion of the cross member 100 in the upper-to-lower direction.
  • the reinforcement portion 104 is formed across the first recessed portion 101 and the right and left wide portions 105 .
  • the reinforcement portion 104 protrudes forward of the seat.
  • the reinforcement portion 104 is configured as a bead portion formed in such a manner that part of the cross member 100 is projected forward of the seat by pressing, for example.
  • the stiffness of the cross member 100 is improved.
  • the reinforcement portion 104 of the wide portion 105 is wider in the upper-to-lower direction than the reinforcement portion 104 of the first recessed portion 101 .
  • a first through-hole 106 and a second through-hole 107 are formed at the reinforcement portion 104 at the wide portion 105 .
  • the first through-hole 106 is a rectangular through-hole
  • the second through-hole 107 is a circular through-hole.
  • the shapes of the through-holes formed at the reinforcement portion 104 of the wide portion 105 are not specifically limited. Note that the through-holes such as the first through-hole 106 and the second through-hole 107 are formed at the cross member 100 , and therefore, the weight of the cross member 100 can be reduced.
  • a first flange portion 108 A is formed at an upper end portion of the cross member 100 .
  • the first flange portion 108 A is a portion formed in such a manner that the upper end portion of the cross member 100 is bent forward of the seat.
  • the first flange portion 108 A is formed across the first recessed portion 101 and the right and left wide portions 105 .
  • the first flange portion 108 A is formed at a position facing the first recessed portion 101 in the upper-to-lower direction. That is, the first flange portion 108 A is formed above the first recessed portion 101 .
  • a second recessed portion 102 A recessed downward of the seat is formed at the first flange portion 108 A of the wide portion 105 .
  • the second recessed portion 102 A is a recessed portion provided at the upper end of the cross member 100 and formed differently from the first recessed portion 101 .
  • a portion below the second recessed portion 102 A protrudes forward of the seat.
  • a second flange portion 108 B is formed at a lower end portion of the cross member 100 .
  • the second flange portion 108 B is a portion formed in such a manner that the lower end portion of the cross member 100 is bent forward of the seat.
  • the second flange portion 108 B is formed across the first recessed portion 101 and the right and left wide portions 105 .
  • a second recessed portion 102 B recessed upward of the seat is formed at the second flange portion 108 B of the wide portion 105 .
  • the second recessed portion 102 B is a recessed portion provided at the lower end of the cross member 100 and formed differently from the first recessed portion 101 .
  • a portion above the second recessed portion 102 B protrudes forward of the seat.
  • the second recessed portion 102 A, the first through-hole 106 , and the second recessed portion 102 B are arranged at positions overlapping with each other in the upper-to-lower direction.
  • cross member 100 has both of the first flange portion 108 A and the second flange portion 108 B, but may have either one of the first flange portion 108 A or the second flange portion 108 B.
  • FIG. 18 An example of attachment of a member to the cross member 100 of the seat frame 1 according to the second embodiment is described with reference to FIG. 18 .
  • a blower 92 is attached to above the first recessed portion 101 of the cross member 100 .
  • an attachment member 90 is fixed between the upper frame 11 and the first recessed portion 101 of the cross member 100 .
  • the attachment member 90 is a metal plate-shaped plate. The attachment member 90 is welded to the upper frame 11 and the first recessed portion 101 of the cross member 100 at welding portions 91 .
  • the blower 92 is fixed to the attachment member 90 .
  • the blower 92 can be arranged in a space above the first recessed portion 101 of the cross member 100 .
  • the first recessed portion 101 is in a shape recessed downward, and therefore, a greater space than the wide portion 105 is formed above the first recessed portion 101 of the cross member 100 .
  • a relatively-large member such as the blower 92 can be arranged above the first recessed portion 101 .
  • Stop portions 95 of cover portions 94 can be attached to the second recessed portion 102 A and the second recessed portion 102 B of the cross member 100 .
  • the stop portion 95 is a hook
  • the hook is stopped at a protruding portion of the second recessed portion 102 A (or the second recessed portion 102 B), and in this manner, the stop portion 95 can be attached to the second recessed portion 102 A (or the second recessed portion 102 B).
  • various members can be attached to the cross member 100 .
  • the seat frame 1 includes the side frames 12 arranged on the right and left sides, and has the first reinforcement portion 30 A extending in the upper-to-lower direction along the rear edge of the side frame side portion 12 A positioned outside in the seat width direction at the side frame 12 . According to the seat frame 1 , the rear edge of the side frame side portion 12 A is reinforced so that the stiffness of the side frame 12 can be improved.
  • the first reinforcement portion 30 A is provided at least at the wide portion having the greatest width in the seat front-to-rear direction at the side frame side portion 12 A.
  • the wide portion of the side frame side portion 12 A is reinforced so that the stiffness of the side frame 12 can be improved.
  • the seat frame 1 has the second reinforcement portion 30 B provided at the side frame side portion 12 A and extending in the seat front-to-rear direction, and the second reinforcement portion 30 B is provided within an upper-to-lower area where the first reinforcement portion 30 A extends.
  • the side frame side portion 12 A is reinforced in the upper-to-lower direction and the front-to-rear direction, and therefore, the stiffness of the side frame 12 can be improved.
  • the first reinforcement portion 30 A and the second reinforcement portion 30 B are coupled to each other.
  • the first reinforcement portion 30 A and the second reinforcement portion 30 B can be integrally formed.
  • formation of the reinforcement portions is facilitated.
  • the seat frame 1 has the third reinforcement portion 30 C provided at the side frame side portion 12 A and extending in the front-to-rear direction at a position apart in a downward direction from the second reinforcement portion 30 B.
  • the stiffness of the side frame side portion 12 A can be improved across a broad area.
  • the second reinforcement portion 30 B is coupled to the portion between the upper and lower ends of the first reinforcement portion 30 A
  • the third reinforcement portion 30 C is coupled to the lower end of the first reinforcement portion 30 A.
  • the second reinforcement portion 30 B and the third reinforcement portion 30 C are different from each other in the angle of extension with respect to the first reinforcement portion 30 A. With this configuration, the stiffness against load input from various directions can be improved.
  • the second reinforcement portion 30 B extends in the direction substantially perpendicular to the torso line T.
  • the second reinforcement portion 30 B extends between the multiple through-holes formed at the side frame side portion 12 A. With this configuration, the stiffness of the periphery of the through-holes can be improved.
  • the multiple through-holes include the airbag attachment hole 31 A for attaching the airbag, and the second reinforcement portion 30 B and the third reinforcement portion 30 C are provided at the positions sandwiching the airbag attachment hole 31 A in the upper-to-lower direction.
  • the first reinforcement portion 30 A is at the position facing at least one of the multiple through-holes in the upper-to-lower direction.
  • the seat frame 1 includes the upper frame 11 coupling the upper portions of the side frames 12 , and the side frame side portion 12 A is joined to the upper frame side portion 11 A positioned outside in the seat width direction at the upper frame 11 .
  • the first reinforcement portion 30 A is provided at the position at which the side frame side portion 12 A and the upper frame side portion 11 A overlap with each other. With this configuration, the stiffness of the joint portion between the side frame 12 and the upper frame 11 can be improved.
  • the seat frame 1 includes the upper frame 11 forming an upper portion of the seat back frame 10 , and the cross member 100 bridged at the upper frame 11 .
  • the cross member 100 has the right and left end portions 103 , which are fixed to the upper frame 11 , in the seat width direction, and the first recessed portion 101 recessed upward or downward between the right and left end portions 103 .
  • the weight of the cross member 100 can be reduced as compared to the case of providing no recessed portion at the cross member 100 . With this configuration, the weight of the cross member 100 bridged between the right and left sides of the seat frame 1 can be reduced.
  • the first recessed portion 101 is provided at the center portion of the cross member 100 in the seat width direction. As described above, the first recessed portion is provided at a position facing the occupant, and therefore, a feeling of sitting on the seat can be improved. Further, according to the seat frame 1 , the space where a member such as the blower 92 is arranged can be provided in the vicinity of the center portion of the cross member 100 .
  • the cross member 100 has the reinforcement portion 104 formed at the first recessed portion 101 . With this configuration, lowering of the stiffness of the vicinity of the first recessed portion 101 of the cross member 100 can be suppressed.
  • the cross member 100 has the wide portions 105 provided on the right and left sides of the first recessed portion 101 in the seat width direction, and the reinforcement portion 104 is formed across the first recessed portion 101 and both of the wide portions 105 . With this configuration, the stiffness of the cross member 100 can be improved.
  • the cross member 100 is provided with the through-holes (the first through-hole 106 , the second through-hole 107 ). With this configuration, the weight of the cross member 100 can be further reduced.
  • the through-holes (the first through-hole 106 , the second through-hole 107 ) are formed at the wide portion 105 .
  • the through-holes (the first through-hole 106 , the second through-hole 107 ) are formed at the wide portion 105 as described above, and therefore, larger through-holes can be formed as compared to the case of forming the through-holes at the first recessed portion 101 . With this configuration, the weight of the cross member 100 can be further reduced.
  • the through-holes (the first through-hole 106 , the second through-hole 107 ) are formed at the reinforcement portion 104 of the wide portion 105 .
  • the seat frame 1 at least part of the wide portion 105 is curved to protrude backward.
  • the stiffness of the cross member 100 can be improved.
  • the cross member 100 can be formed in a shape matching the body shape of the occupant, and therefore, the feeling of sitting on the seat can be improved.
  • the seat frame 1 has the second recessed portion (the second recessed portion 102 A, the second recessed portion 102 B) different from the first recessed portion 101 , the second recessed portion being provided at least at one of the upper or lower end of the cross member 100 .
  • the weight of the cross member 100 can be further reduced.
  • a member such as the stop portion 95 of the cover portion 94 can be stopped at the second recessed portion (the second recessed portion 102 A, the second recessed portion 102 B).
  • the number of components forming the seat can be reduced. Consequently, the weight of the seat can be reduced.
  • the seat frame 1 has the flange portion (the first flange portion 108 A, the second flange portion 108 B) provided at least at one of the upper or lower end of the cross member 100 .
  • the flange portion (the first flange portion 108 A, the second flange portion 108 B) is formed at the position facing the first recessed portion 101 in the upper-to-lower direction. With this configuration, the stiffness of the first recessed portion 101 can be improved.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)
US16/323,986 2016-08-09 2017-08-08 Seat frame Abandoned US20190210497A1 (en)

Applications Claiming Priority (5)

Application Number Priority Date Filing Date Title
JP2016-156889 2016-08-09
JP2016156889 2016-08-09
PCT/JP2017/013793 WO2018029899A1 (ja) 2016-08-09 2017-03-31 シートフレーム
JPPCT/JP2017/013793 2017-03-31
PCT/JP2017/028846 WO2018030439A1 (ja) 2016-08-09 2017-08-08 シートフレーム

Related Parent Applications (1)

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PCT/JP2017/028846 A-371-Of-International WO2018030439A1 (ja) 2016-08-09 2017-08-08 シートフレーム

Related Child Applications (1)

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US17/550,075 Continuation US11794619B2 (en) 2016-08-09 2021-12-14 Seat frame

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US20190210497A1 true US20190210497A1 (en) 2019-07-11

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US16/323,986 Abandoned US20190210497A1 (en) 2016-08-09 2017-08-08 Seat frame
US17/550,075 Active US11794619B2 (en) 2016-08-09 2021-12-14 Seat frame
US18/467,769 Pending US20240001828A1 (en) 2016-08-09 2023-09-15 Seat frame

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US17/550,075 Active US11794619B2 (en) 2016-08-09 2021-12-14 Seat frame
US18/467,769 Pending US20240001828A1 (en) 2016-08-09 2023-09-15 Seat frame

Country Status (5)

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US (3) US20190210497A1 (de)
EP (1) EP3498530A4 (de)
JP (3) JP7025627B2 (de)
CN (1) CN109562707B (de)
WO (2) WO2018029899A1 (de)

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US10640026B2 (en) * 2017-09-25 2020-05-05 Tachi-S Co., Ltd. Vehicle seat
US10752138B2 (en) * 2015-08-04 2020-08-25 Ts Tech Co., Ltd. Seat frame for vehicle
USD1002211S1 (en) * 2021-11-05 2023-10-24 Ussc Acquisition Corp. Vehicle seat

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JP6349035B2 (ja) * 2015-07-29 2018-06-27 テイ・エス テック株式会社 車両用シートフレーム
JP6506321B2 (ja) * 2017-02-02 2019-04-24 テイ・エス テック株式会社 シートフレーム
DE102018209427B4 (de) * 2018-06-13 2021-01-14 Adient Engineering and IP GmbH Rückenlehne für einen Fahrzeugsitz
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CN109562707A (zh) 2019-04-02
JP7269519B2 (ja) 2023-05-09
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US20240001828A1 (en) 2024-01-04
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