WO2025121421A1 - 乗物用シート - Google Patents

乗物用シート Download PDF

Info

Publication number
WO2025121421A1
WO2025121421A1 PCT/JP2024/043275 JP2024043275W WO2025121421A1 WO 2025121421 A1 WO2025121421 A1 WO 2025121421A1 JP 2024043275 W JP2024043275 W JP 2024043275W WO 2025121421 A1 WO2025121421 A1 WO 2025121421A1
Authority
WO
WIPO (PCT)
Prior art keywords
movable
frame
seat
belt retractor
seat belt
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.)
Pending
Application number
PCT/JP2024/043275
Other languages
English (en)
French (fr)
Japanese (ja)
Inventor
孝宜 香取
篤史 山部
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.)
Honda Motor Co Ltd
TS Tech Co Ltd
Original Assignee
Honda Motor Co Ltd
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 Honda Motor Co Ltd, TS Tech Co Ltd filed Critical Honda Motor Co Ltd
Priority to JP2025562263A priority Critical patent/JPWO2025121421A1/ja
Publication of WO2025121421A1 publication Critical patent/WO2025121421A1/ja
Pending legal-status Critical Current
Anticipated expiration legal-status Critical

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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
    • B60N2/02—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable
    • B60N2/22—Seats specially adapted for vehicles; Arrangement or mounting of seats in vehicles the seat or part thereof being movable, e.g. adjustable the back-rest being adjustable
    • 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
    • B60N2/68—Seat frames

Definitions

  • the present invention relates to a vehicle seat.
  • Patent Document 1 discloses a vehicle seat that includes a seat back frame and a folding frame that is connected to the seat back frame so that it can be tilted.
  • a seat belt retractor is installed on the seat cushion.
  • a seat back with a folding function has a complex structure.
  • a seat belt retractor is provided on the seat back, it becomes easier for the seat occupant to pull out the seat belt to shoulder or chest height, but installing a seat belt retractor causes the seat back to become larger.
  • the present invention aims to provide a vehicle seat equipped with a seat back having a base frame and a movable frame connected to the base frame so as to be tiltable, by providing a seat belt retractor in the seat back and configuring the seat back compactly.
  • one aspect of the present invention has a seat back frame (10) and a seat belt retractor (204) supported by the seat back frame, the seat back frame includes a base frame (11) and a movable frame (12) connected to the base frame so as to be tiltable in the front-rear direction, and the upper end of the seat belt retractor is located below the upper end of the movable frame and above the lower end of the movable frame.
  • a seat belt retractor for retracting the seat belt can be provided on the seat back, thereby improving the safety of the occupants. Furthermore, since the upper end of the seat belt retractor is located below the upper end of the movable frame and above the lower end of the movable frame, the seat back can be configured compactly.
  • the movable frame has a pair of left and right movable side members (38) and a movable upper member (39) that extends in the left-right direction and connects the upper edges of the movable side members, and the seat belt retractor is disposed in a position biased toward the movable side member on one side, and at least a portion of the seat belt retractor is located inside the seat with respect to the movable side member on one side.
  • At least a portion of the seat belt retractor is positioned on the inside of the seat relative to the adjacent movable side member, allowing the seat back to be made more compact than if the entire seat belt retractor were positioned on the outside of the seat.
  • the center of the seat belt retractor is preferably positioned closer to the seat than the movable side member on one side.
  • the center of the seat belt retractor is positioned on the inside of the seat relative to the adjacent movable side member, making it possible to make the seat back more compact than if the entire seat belt retractor were positioned on the outside of the seat.
  • the entire seat belt retractor is located inside the seat further inward than the movable side member on one side.
  • the entire seat belt retractor is positioned on the inside of the seat relative to the adjacent movable side member, allowing the seat back to be made more compact than if the entire seat belt retractor were positioned on the outside of the seat.
  • the movable frame is rotatably connected to the base frame around a rotation axis (X) extending in the left-right direction, and the lower end of the seat belt retractor is located above the rotation axis.
  • the seat belt retractor can be installed in a position where it is unlikely to be affected by the rotation of the movable frame.
  • the movable frame is provided with a pressure-receiving member (74) that supports the weight of a seated occupant, and when the upper end of the movable frame is positioned at the rearmost position, the upper end of the seat belt retractor is positioned above the pressure-receiving member.
  • the seat belt retractor can be installed in a position where it is unlikely to be affected by the rotation of the movable frame.
  • the lower end of the seat belt retractor is positioned above the pressure-receiving member.
  • the seat belt retractor can be installed in a position where it is unlikely to be affected by the rotation of the movable frame.
  • the movable frame has a pair of left and right movable side members (38) and a movable upper member (39) that extends in the left-right direction and connects the upper edges of the movable side members, and each of the movable side members is rotatably connected to the base frame and has a side portion (41) extending upward and a shoulder portion (42) that extends from the upper end of the side portion at an angle toward the inside of the seat, bends upward at a bent portion (43), and extends further upward, and when the upper end of the movable frame is located at the rearmost position, the lower end of the seat belt retractor is located below the bent portion.
  • At least a portion of the seat belt retractor is disposed below the movable frame, allowing the seat back to be constructed more compactly than when the entire seat belt retractor is located above the movable frame.
  • the seat belt further includes an actuator (98) that tilts the movable frame relative to the base frame
  • the movable frame includes a pair of left and right movable side members (38) and a movable upper member (39) that extends in the left-right direction and connects the upper edges of the movable side members
  • the actuator is connected to the movable upper member and the base frame
  • the end of the seat belt retractor on the inside of the seat is located outside the seat relative to the connection position between the actuator and the movable upper member.
  • the end of the seat belt retractor on the inside of the seat is positioned on the inside of the seat relative to the connection position between the actuator and the movable upper member, allowing the seat back to be made more compact than if it were positioned on the outside of the seat.
  • the movable frame is provided with a pressure-receiving member (74) that supports the back of the seated occupant, the pressure-receiving member is connected to the movable frame via a mounting member (87), and the upper end of the seat belt retractor is located below the connection between the mounting member and the movable frame.
  • the seat belt retractor is located below the joint between the installation member and the movable frame, allowing the seat back to be made more compact than if it were located above.
  • the base frame preferably includes a front frame (20) that receives the load of the occupant, and a rear frame (21) that is disposed opposite the front frame and is connected to the front frame, and at least a portion of the seat belt retractor is located behind the front frame.
  • At least a portion of the seat belt retractor is located behind the front frame, which prevents the seat occupant from feeling like there is something foreign in the seat compared to when the seat belt retractor is located in front of the front frame.
  • One aspect of the present invention has a seat back frame (10) and a seat belt retractor (204) supported by the seat back frame, the seat back frame including a base frame (11) and a movable frame (12) connected to the base frame so as to be tiltable in the front-rear direction, and the upper end of the seat belt retractor is located below the upper end of the movable frame and above the lower end of the movable frame.
  • a seat belt retractor for retracting the seat belt can be provided on the seat back, thereby improving the safety of the occupants. Furthermore, since the upper end of the seat belt retractor is located below the upper end of the movable frame and above the lower end of the movable frame, the seat back can be configured compactly.
  • the movable frame has a pair of left and right movable side members (38) and a movable upper member (39) that extends in the left-right direction and connects the upper edges of the movable side members, and the seat belt retractor is disposed in a position biased toward the movable side member on one side, and at least a portion of the seat belt retractor is located inside the seat with respect to the movable side member on one side.
  • At least a portion of the seat belt retractor is positioned on the inside of the seat relative to the adjacent movable side member, allowing the seat back to be made more compact than if the entire seat belt retractor were positioned on the outside of the seat.
  • the center of the seat belt retractor is preferably positioned closer to the seat than the movable side member on one side.
  • the center of the seat belt retractor is positioned on the inside of the seat relative to the adjacent movable side member, making it possible to make the seat back more compact than if the entire seat belt retractor were positioned on the outside of the seat.
  • the entire seat belt retractor is located inside the seat further inward than the movable side member on one side.
  • the entire seat belt retractor is positioned on the inside of the seat relative to the adjacent movable side member, allowing the seat back to be made more compact than if the entire seat belt retractor were positioned on the outside of the seat.
  • the movable frame is rotatably connected to the base frame around a rotation axis (X) extending in the left-right direction, and the lower end of the seat belt retractor is located above the rotation axis.
  • the seat belt retractor can be installed in a position where it is unlikely to be affected by the rotation of the movable frame.
  • the movable frame is provided with a pressure-receiving member (74) that supports the weight of a seated occupant, and when the upper end of the movable frame is positioned at the rearmost position, the upper end of the seat belt retractor is positioned above the pressure-receiving member.
  • the seat belt retractor can be installed in a position where it is unlikely to be affected by the rotation of the movable frame.
  • the lower end of the seat belt retractor is positioned above the pressure-receiving member.
  • the seat belt retractor can be installed in a position where it is unlikely to be affected by the rotation of the movable frame.
  • the movable frame has a pair of left and right movable side members (38) and a movable upper member (39) that extends in the left-right direction and connects the upper edges of the movable side members, and each of the movable side members is rotatably connected to the base frame and has a side portion (41) extending upward and a shoulder portion (42) that extends from the upper end of the side portion at an angle toward the inside of the seat, bends upward at a bent portion (43), and extends further upward, and when the upper end of the movable frame is located at the rearmost position, the lower end of the seat belt retractor is located below the bent portion.
  • At least a portion of the seat belt retractor is disposed below the movable frame, allowing the seat back to be constructed more compactly than when the entire seat belt retractor is located above the movable frame.
  • the seat belt further includes an actuator (98) that tilts the movable frame relative to the base frame
  • the movable frame includes a pair of left and right movable side members (38) and a movable upper member (39) that extends in the left-right direction and connects the upper edges of the movable side members
  • the actuator is connected to the movable upper member and the base frame
  • the end of the seat belt retractor on the inside of the seat is located outside the seat relative to the connection position between the actuator and the movable upper member.
  • the end of the seat belt retractor on the inside of the seat is positioned on the inside of the seat relative to the connection position between the actuator and the movable upper member, allowing the seat back to be made more compact than if it were positioned on the outside of the seat.
  • the movable frame is provided with a pressure-receiving member (74) that supports the back of the seated occupant, the pressure-receiving member is connected to the movable frame via a mounting member (87), and the upper end of the seat belt retractor is located below the connection between the mounting member and the movable frame.
  • the seat belt retractor is located below the joint between the installation member and the movable frame, allowing the seat back to be made more compact than if it were located above.
  • the base frame preferably includes a front frame (20) that receives the load of the occupant, and a rear frame (21) that is disposed opposite the front frame and is connected to the front frame, and at least a portion of the seat belt retractor is located behind the front frame.
  • At least a portion of the seat belt retractor is located behind the front frame, which prevents the seat occupant from feeling like there is something foreign in the seat compared to when the seat belt retractor is located in front of the front frame.
  • FIG. 1 is a perspective view of a seat according to an embodiment
  • FIG. 1 is a perspective view of a seat back frame, a movable frame, and an airbag module when a movable portion is in an upright position
  • FIG. 1 is a side view of a seat back frame when a movable portion is in an upright position.
  • A) A perspective view of the front panel and (B) a perspective view of the rear panel VI-VI cross-sectional view of FIG. 1A is a perspective view showing a bead provided on a front panel;
  • FIG. 1B is a first modified example of the bead;
  • FIG. 1C is a second modified example of the bead; and FIG. 1D is a third modified example of the bead.
  • FIG. 1 is a perspective view of a seat back frame, a movable frame, and an airbag module when a movable portion is in a forward tilted position;
  • 1 is a perspective view of a movable frame, an upper installation member, a lower installation member, and a pivot bracket;
  • 1 is a perspective view showing a joint between a rotating bracket and a base frame, and a joint between a rotating bracket and a movable frame;
  • FIG. 1 is a perspective view of a seat back frame, a movable frame, and an airbag module when a movable portion is in a forward tilted position
  • 1 is a perspective view of a movable frame, an upper installation member, a lower
  • FIG. 1 is a top view of a seat back frame, a movable frame, and an airbag module when the movable part is in an upright position.
  • FIG. 1 is a top view of a seat back frame, a movable frame, and an airbag module when the movable portion is in a forward tilted position.
  • FIG. 1 is a side view of a seat back frame when the movable portion is in a forward tilt position.
  • the direction toward the center in the left-right direction of the seat (also called the seat width direction) when viewed from the front is described as the inward side of the seat (or the inner side of the seat).
  • the direction away from the center in the left-right direction of the seat is described as the outward side of the seat (or the outer side of the seat).
  • a vehicle seat (hereinafter, referred to as seat 1) is placed on a floor 3 that defines the bottom of a passenger compartment 2 (also referred to as a vehicle interior) of an automobile.
  • the seat 1 has a seat cushion 4 provided on the floor 3, a seat back 5 extending upward from the rear of the seat cushion 4, and a headrest 6 provided on an upper portion of the seat back 5.
  • the seat cushion 4 forms a seating surface 4S and supports the buttocks of a seated occupant.
  • the seat back 5 forms a backrest surface 5S facing forward and supports the back of the seated occupant.
  • the headrest 6 is disposed behind the head of the seated occupant.
  • the seat cushion 4 may be supported on the floor 3 via a slide device (not shown) so as to be slidable back and forth.
  • the seat back 5 comprises a base portion 8 that constitutes the lower half of the backrest surface 5S, and a movable portion 9 that constitutes the upper half of the backrest surface 5S.
  • the movable portion 9 is connected to and supported by the base portion 8 so as to be rotatable about a rotation axis X (also called a pivot axis) that passes through its lower portion and extends in the left-right direction. This allows the upper half of the backrest surface 5S to be tilted relative to the lower half.
  • the headrest 6 is fixed to the upper portion of the movable portion 9.
  • the seat back 5 of the seat 1 is also referred to as a center-folding seat back.
  • the position of the movable part 9 when its upper part is tilted all the way back will be referred to as the upright position (also referred to as the backward tilt position), and the position of the movable part 9 when it has rotated from the upright position around the rotation axis X and its upper part is tilted all the way forward will be referred to as the forward tilt position.
  • the seat cushion 4 comprises a seat cushion frame (not shown) that forms the skeleton, a pad member (not shown) supported by the seat cushion frame, and a skin material (not shown) that covers at least a portion of the surface of the pad member.
  • the pad member that constitutes the seat cushion 4 is formed from a cushion material having elasticity such as polyurethane foam, and the skin material that covers the pad member may be formed from genuine leather, synthetic leather, fabric, or the like.
  • the seat cushion 4 is constructed by covering the seat cushion frame with the pad member and skin material.
  • the seat back 5 comprises a seat back frame 10 forming a skeleton, a pad member (not shown) supported by the seat back frame 10, and a skin material (not shown) covering at least a portion of the surface of the pad member.
  • the pad member may be constructed such that the upper half constituting the movable part 9 and the lower half constituting the base part 8 are separate bodies, or the upper half constituting the movable part 9 and the lower half constituting the base part 8 may be integrally constructed.
  • the skin material may be constructed such that the upper half constituting the movable part 9 and the lower half constituting the base part 8 are separate bodies.
  • the seatback frame 10 has a base frame 11 that forms the framework of the base portion 8, and a movable frame 12 that forms the framework of the movable portion 9 and is connected to the base frame 11 so as to be tiltable (rotatable) about a rotation axis X.
  • a reclining shaft 13 to which the seat cushion frame is connected is provided at the bottom of the base frame 11.
  • the base frame 11 is in the shape of a rectangular frame and includes a pair of left and right base side members 14, a base upper member 15 and a base lower member 16.
  • the base side members 14 each extend in the up-down direction and are arranged at a distance from each other on the left and right.
  • the base upper member 15 extends left and right and connects upper portions (upper ends in this embodiment) of the two base side members 14.
  • the base lower member 16 also extends left and right and connects lower portions of the two base side members 14. This results in the base frame 11 being in the shape of a rectangular frame when viewed from the front.
  • the base frame 11 has two base middle members 17 that connect the vertical center of the left base side member 14 to the vertical center of the right base side member 14.
  • the two base middle members 17 are arranged vertically spaced apart.
  • the upper base middle member 17 will be referred to as the upper middle member 17U
  • the lower base middle member 17 will be referred to as the lower middle member 17D.
  • the left-right center of the upper middle member 17U and the left-right center of the base upper member 15 are connected by a central member 18.
  • Each base side member 14 is provided with a plate-shaped side edge portion 19 that extends from the rear end toward the inside of the seat and has a surface facing forward.
  • the front surface of the side edge portion 19 and the wall surface of the base side member 14 on the inside of the seat are connected at a substantially right angle when viewed from above.
  • the base frame 11 includes a front panel 20 (also called a front member or a front frame) and a rear panel 21 (also called a rear member or a rear frame).
  • the front panel 20 is a rectangular frame made of bent sheet metal members.
  • the front panel 20 constitutes the seated occupant side of the base frame 11 and bears the weight of the occupant.
  • the rear panel 21 is also a rectangular frame made of bent sheet metal members. The rear panel 21 is disposed opposite the front panel 20 and constitutes the side of the base frame 11 away from the seated occupant.
  • the rear panel 21 has an outer frame portion 21A that constitutes the seat outer surface of the base side member 14, a first extension portion 21B that extends from the front edge of the outer frame portion 21A toward the inside of the seat, and a second extension portion 21C that extends from the rear edge of the outer frame portion 21A toward the inside of the seat.
  • the front panel 20 has an inner frame portion 20A that constitutes the seat inner portion of the base side member 14, a third extension portion 20B that extends from the front edge of the inner frame portion 20A toward the outside of the seat, and a fourth extension portion 20C that extends from the front edge of the inner frame portion 20A toward the inside of the seat.
  • the inner frame portion 20A and the outer frame portion 21A face each other and are arranged at positions spaced apart.
  • the first extension portion 21B and the third extension portion 20B are overlapped, and the second extension portion 21C and the fourth extension portion 20C are overlapped and joined (welded in this embodiment), so that the rear panel 21 is joined to the front panel 20 at its edges.
  • the rear panel 21 cooperates with the front panel 20 to form a closed cross-sectional structure P.
  • a cavity 22 is formed in the base frame 11, and the base frame 11 is configured to be hollow.
  • the second extension portion 21C partially connects the left and right outer frame portions 21A, and the fourth extension portion 20C also partially connects the inner frame portion 20A.
  • the base middle member 17 is formed by overlapping and joining the second extension portion 21C and the fourth extension portion 20C.
  • the central member 18 (more specifically, the vertical central portion of the central member 18) is mainly composed of the rear panel 21 only.
  • Airbag module> 3(A) and 3(B) two airbag modules 24 are coupled to the base frame 11.
  • One of the airbag modules 24 is coupled to the side surface of the base frame 11 (base side member 14) on the vehicle exterior side (the left side in this embodiment).
  • the airbag module 24 coupled to the vehicle exterior side of the base frame 11 constitutes an outer airbag module 24L.
  • the other airbag module 24 is connected to the vehicle interior side (right side in this embodiment) of the base frame 11 (base side member 14).
  • the airbag module 24 connected to the vehicle interior side of the base frame 11 constitutes the inner airbag module 24R, which includes the near side airbag.
  • the outer airbag module 24L and inner airbag module 24R are located on the left and right sides of the movable frame 12, respectively, and are connected to the outer side of the seat of the rear panel 21. This allows the airbag modules 24 to be mounted on both the left and right sides of the outer side of the seat of the base frame 11. This allows the airbag 25 to be deployed on both sides outside the seat of the seat occupant, improving the safety of the seat 1.
  • the airbag module 24 includes an airbag 25, an inflator 26 that inflates the airbag 25 by introducing gas into the interior of the airbag 25, and a case 27 that houses the airbag 25 and the inflator 26.
  • a retainer 28 is provided on the side surface of the airbag module 24 on the inner side of the seat.
  • a plurality of stud bolts 29 are provided on the inflator 26. The stud bolts 29 penetrate the retainer 28 and the bottom wall of the case 27 located on the inner side of the seat, and protrude toward the inner side of the seat.
  • the outer frame portion 21A of the rear panel 21 is provided with fastening holes 30 through which stud bolts 29 pass.
  • the stud bolts 29 are inserted into the corresponding fastening holes 30 and nuts 31 are fastened, thereby fastening the airbag module 24 to the seat outer side surface of the base side member 14 (i.e., the seat outer side surface of the rear panel 21).
  • the connection portion of the rear panel 21 with the outer airbag module 24L will be referred to as the rear connection portion 32.
  • the rear connection portion 32 is formed by the fastening holes 30.
  • the front panel 20 is provided with an access hole 33, which is a through hole for accessing the fastening hole 30 from the inside of the seat.
  • At least one of the front-rear width and the up-down width (preferably both) of the access hole 33 is configured to be larger than the fastening hole 30, and the area of the opening of the access hole 33 is formed to be larger than the area of the opening of the fastening hole 30. This allows the worker to easily pass the nut 31 or a tool through the access hole 33, improving the workability of assembling the airbag module 24.
  • each airbag module 24 is provided with two stud bolts 29.
  • four fastening holes 30 are arranged vertically in one base side member 14 so that the airbag module 24 can be assembled in two positions (upper and lower positions hereinafter).
  • the four fastening holes 30 will be referred to as the first fastening hole 30A, the second fastening hole 30B, the third fastening hole 30C, and the fourth fastening hole 30D, in order from the top.
  • the airbag module 24 is assembled to the base side member 14 in an upper position by inserting and fastening the stud bolts 29 into the first fastening hole 30A and the third fastening hole 30C.
  • the airbag module 24 is assembled to the base side member 14 in a lower position by inserting and fastening the stud bolts 29 into the second fastening hole 30B and the fourth fastening hole 30D.
  • the inner frame portion 20A of the front panel 20 is provided with two access holes 33: an upper access hole 33A located on the seat inner side of the first fastening hole 30A and the second fastening hole 30B, and a lower access hole 33B located on the seat inner side of the third fastening hole 30C and the fourth fastening hole 30D.
  • the upper access hole 33A and the lower access hole 33B are formed in a vertical line on the front panel 20.
  • the upper access hole 33A is formed to overlap the first fastening hole 30A and the second fastening hole 30B in a side view.
  • the upper edge of the upper access hole 33A is located above the upper edge of the first fastening hole 30A, and the lower edge of the upper access hole 33A is located below the lower edge of the second fastening hole 30B.
  • the lower access hole 33B is formed so as to overlap the third fastening hole 30C and the fourth fastening hole 30D in a side view.
  • the upper edge of the lower access hole 33B is located above the upper edge of the third fastening hole 30C, and the lower edge of the lower access hole 33B is located below the lower edge of the fourth fastening hole 30D.
  • a bead 35 is provided in the vicinity of the access hole 33 of the front panel 20.
  • the bead 35 functions as a rigidity improving portion that increases the rigidity of the vicinity of the access hole 33 of the front panel 20.
  • the bead 35 is provided at a corner portion 36 that is a connecting portion between the side edge portion 19 and the base side member 14 (inner frame portion 20A) and is behind the two access holes 33.
  • the bead 35 forms a protrusion that protrudes from the corner portion 36.
  • the bead 35 may be formed by pushing (bending) the front panel 20 at the corner portion 36 in a direction that inclines forward toward the inside of the seat.
  • Figure 7(A) shows an enlarged view of the area near the bead 35 of the front panel 20.
  • one bead 35 is provided at a corner 36 of the front panel 20 so as to extend in the vertical direction.
  • the upper end of the bead 35 is located below the upper end of the upper access hole 33A.
  • the lower end of the bead 35 is located below the lower end of the lower access hole 33B.
  • FIGS. 7(B) to (D) show modified examples of the number, shape, and arrangement of the beads 35.
  • one bead 35 is provided at the corner 36 so as to extend in the vertical direction.
  • the upper end of the bead 35 is located above the upper end of the upper access hole 33A.
  • the lower end of the bead 35 is located below the lower end of the lower access hole 33B.
  • one bead 35 is provided at the corner 36 so as to extend in the vertical direction.
  • the upper end of the bead 35 is located above the upper end of the upper access hole 33A.
  • the lower end of the bead 35 is located above the lower end of the lower access hole 33B.
  • multiple beads 35 are arranged vertically.
  • the beads 35 may be arranged vertically at equal intervals.
  • the upper end of the uppermost bead 35 is located above the upper access hole 33A.
  • the lower end of the lowermost bead 35 is located below the lower access hole 33B.
  • Figs. 7(A) to (D) show beads 35 provided on the base side member 14 on the vehicle exterior side
  • beads 35 of shapes corresponding to each example may be provided on the base side member 14 on the vehicle interior side.
  • the beads 35 provided on the base side member 14 on the vehicle exterior side and the beads 35 provided on the base side member 14 on the vehicle interior side may have the same (bilaterally symmetrical) shape, and one may be formed to be longer than the other.
  • the number of beads 35 provided on the base side member 14 on the vehicle exterior side may be different from the number of beads 35 provided on the base side member 14 on the vehicle interior side.
  • the front panel 20 may be joined to the rear panel 21 at a position that avoids the bead 35. This allows the front panel 20 and the rear panel 21 to be easily joined. Note that various known methods such as laser welding or bolt fastening can be used to join the front panel 20 and the rear panel 21.
  • the front panel 20 may be joined to the rear panel 21 at a position where it overlaps with the bead 35. This allows the front panel 20 to be joined to the rear panel 21 at a portion with high rigidity.
  • the movable frame 12 includes a pair of left and right movable side members 38 and a movable upper member 39.
  • the movable side members 38 are arranged at a distance from each other on the left and right, and each extends in the up-down direction.
  • the movable upper member 39 extends in the left-right direction and connects the upper parts of the two movable side members 38.
  • the lower ends of the movable side members 38 are connected to the base side member 14 via pivot brackets 40 (also called mounting members) so as to be rotatable about the rotation axis X.
  • the movable frame 12 is connected to the base frame 11 so as to be rotatable (i.e., tiltable) about the rotation axis X.
  • the movable frame 12 is made of bent pipe material, but it is not limited to this form and may be made of one or more sheet metal members.
  • each of the movable side members 38 has a movable member side portion 41 constituting the lower portion, and a movable member shoulder portion 42 constituting the center and upper portion.
  • Each of the movable member side portions 41 extends in the vertical direction.
  • Each of the movable member side portions 41 is connected at its lower end to the base side member 14 on the seat inner side via a rotating bracket 40 so as to be rotatable about the rotation axis X.
  • Each of the movable member shoulder portions 42 is connected to the upper end of the movable member side portion 41.
  • the movable member shoulder portion 42 extends from the upper end of the movable member side portion 41 toward the inside of the seat, inclining upward, and then bends upward at the movable member bend portion 43 and extends further upward.
  • the movable member shoulder portion 42 of the left movable side member 38 is connected at its upper end to the left end of the movable upper member 39
  • the movable member shoulder portion 42 of the right movable side member 38 is connected at its upper end to the right end of the movable upper member 39.
  • the movable frame 12 is provided with auxiliary members 44 connected to the left and right movable side members 38.
  • the auxiliary members 44 are made of bent wires, and are connected to the corresponding movable side members 38 at both the left and right ends.
  • the pivot bracket 40 is fixed to the base frame 11 (specifically, the base side member 14) and connects the movable frame 12 to the base frame 11 (base side member 14) so that it can pivot (also called rotatably) about the rotation axis X.
  • the pivot bracket 40 is made of a bent sheet metal member.
  • the pivot bracket 40 has a pivot bracket front portion 45 that is connected to the side surface on the inside of the seat of the base side member 14 on one of the left and right sides, and a pivot bracket rear portion 46 that extends inward from the rear edge of the pivot bracket front portion 45 and is connected to the front surface of the side edge portion 19.
  • the pivot bracket front portion 45 has a flat plate portion 45A and a bulge portion 45B that bulges inwardly from the seat.
  • the plate portion 45A is disposed along the seat inner side surface of the front panel 20 that constitutes the base side member 14.
  • the bulge portion 45B is circular in side view.
  • the bulge portion 45B is spaced apart from the seat inner side surface of the front panel 20 that constitutes the base side member 14.
  • the lower ends of the movable side members 38 are each provided with a through hole 48 (see FIG. 9).
  • a pin 49 (see FIG. 10) that passes through the through hole 48 and extends in the left-right direction is fixed to the bulge portion 45B.
  • the movable side member 38 is connected to the pin 49 so as to be rotatable about the rotation axis X.
  • the movable side members 38 are each connected to the seat inner side surface of the bulge portion 45B so as to be rotatable about the rotation axis X.
  • the pivot bracket front portion 45 and the pivot bracket rear portion 46 each have a bolt hole 50.
  • the bolt hole 50 provided in the pivot bracket front portion 45 will be referred to as the front bolt hole 50A
  • the bolt hole 50 provided in the pivot bracket rear portion 46 will be referred to as the rear bolt hole 50B.
  • a stud bolt 52 protruding inward from the seat is provided in the wall constituting the seat inner side of the base side member 14 of the front panel 20.
  • a first through hole 53 penetrating the wall is provided in the wall constituting the seat inner side of the base side member 14 of the front panel 20.
  • the stud bolt 52 is inserted into the first through hole 53 and fixed to the front panel 20.
  • a second through hole 54 penetrating in the plate thickness direction (front-rear direction) is provided in the portion of the side edge portion 19 located on the seat inner side of the first through hole 53.
  • the second through hole 54 penetrates the front panel 20 and the rear panel 21, respectively.
  • the second through hole 54 may be configured to penetrate only the front panel 20.
  • a stud bolt 52 is inserted into the front bolt hole 50A and the first through hole 53, and a nut 55 is attached to the stud bolt 52, thereby fastening the pivot bracket front part 45 to the side surface on the inside of the seat of the base side member 14.
  • a bolt 56 is inserted into the rear bolt hole 50B and the second through hole 54, and a nut 57 is attached to the swivel bracket rear part 46 to the front surface of the side edge part 19. In this way, the pivot bracket 40 is fastened and fixed to the inner surface on the inside of the seat of the front panel 20 and to the side edge part 19.
  • the first through hole 53 and the second through hole 54 which are the connecting parts between the front panel 20 and the pivot bracket 40, will be collectively referred to as the front connecting part 58.
  • the pivot bracket 40 is fastened to the front connecting part 58 of the front panel 20, and the movable frame 12 is rotatably connected to the front connecting part 58 via the pivot bracket 40.
  • the front panel 20 is provided with two front connecting parts 58.
  • the pivot bracket 40 is located between the outer airbag module 24L and the inner airbag module 24R.
  • the pivot bracket 40 is located above the rear joint 32.
  • both of the two front joints 58 which are the joints between the front panel 20 and the movable frame 12, are located above the rear joint 32.
  • the front joints 58 are provided in front of and behind the rear joint 32. In this way, because the pivot bracket 40 is joined to the front panel 20 in front of and behind the rear joint 32, the movable frame 12 can be firmly joined to the front panel 20.
  • the pivot bracket 40 has a flange portion 60.
  • the flange portion 60 is plate-shaped and extends forward from the lower edge of the pivot bracket rear portion 46.
  • the flange portion 60 is rectangular plate-shaped with faces facing in the vertical direction.
  • the flange portion 60 has an insertion hole 62 that penetrates in the vertical direction at approximately the center in the front-rear and left-right directions. In this embodiment, the insertion hole 62 is circular when viewed from above.
  • the flange portion 60 is located between the two front joint portions 58 in the front-to-rear direction.
  • the front joint portions 58 are located in front of and behind the flange portion 60.
  • a headrest frame 64 is coupled to the rear surface of the movable frame 12.
  • the headrest frame 64 is a frame for supporting or configuring the headrest 6, and is provided for supporting the headrest 6 in this embodiment.
  • the headrest frame 64 comprises a pair of vertical portions 65 spaced apart from each other, and horizontal portions 66 that extend to the left and right and connect the upper edges of the vertical portions 65.
  • the vertical portions 65 are each joined at their lower ends to the movable member bend portions 43. This allows the headrest frame 64 to be fixed to the movable side member 38.
  • Each of the vertical portions 65 has a headrest side portion 68 and a headrest shoulder portion 69.
  • the headrest side portion 68 is connected at its end to the movable side member 38 and extends upward.
  • the headrest side portion 68 may be connected (welded) to the movable member bent portion 43.
  • the headrest shoulder portion 69 is connected at its end to the upper end of the headrest side portion 68.
  • the headrest shoulder portion 69 extends from the upper end of the headrest side portion 68 at an angle upward toward the inside of the seat, and is bent upward at the headrest bent portion 70 to extend further upward.
  • the headrest frame 64 is made of bent pipe material, but is not limited to this form and may be made of one or more sheet metal members.
  • the headrest 6 is fixed to the upper part of the headrest frame 64.
  • the headrest 6 may be composed of a plate-shaped member (not shown) facing the front-rear direction, a pad member (not shown) provided on the front surface of the plate-shaped member, and a skin material (not shown) covering the front surface of the pad member.
  • the rear surface of the plate-shaped member is fixed to the headrest frame 64, so that the headrest 6 is connected to the upper front surface of the headrest frame 64.
  • the seat back frame 10 is provided with a pressure-receiving member 72 that supports the weight of a seated occupant.
  • the pressure-receiving member 72 includes a lower pressure-receiving member 73 provided on the base frame 11 and an upper pressure-receiving member 74 provided on the movable frame 12.
  • the lower pressure-receiving member 73 is supported by the base frame 11, and the upper pressure-receiving member 74 is mainly supported by the movable frame 12.
  • the upper pressure-receiving member 74 is disposed above the lower pressure-receiving member 73 in a front view.
  • the lower pressure-receiving member 73 is disposed behind the lower half of the back of the seated occupant and supports the load of the lower half of the back of the seated occupant. As shown in Fig. 2, the lower pressure-receiving member 73 is made of a flat plate-like member.
  • the lower pressure-receiving member 73 may be made of a resin plate-like member, or may be made of a metal plate or the like.
  • the lower pressure-receiving member 73 comprises a lower main part 76 having a front surface facing the front-rear direction, and a pair of left and right lower parts 77 provided on the left and right edges of the lower main part 76.
  • the lower main part 76 has a rectangular shape extending in the up-down direction when viewed from the front.
  • the lower parts 77 are each connected to the edge of the lower main part 76 on the outer side of the sheet.
  • the lower parts 77 have a rectangular shape with a triangular notch cut out at the upper end on the outer side of the sheet.
  • the lower pressure-receiving member 73 is disposed between the left base side member 14 and the right base side member 14.
  • the lower pressure-receiving member 73 is supported by the left base side member 14 and the right base side member 14 via a lower installation member 79.
  • the lower installation member 79 is made of a bent metal rod-shaped member (a round bar in this embodiment).
  • the lower installation member 79 may also be made of a metal pipe material.
  • the lower installation member 79 has a pair of left and right hooks 80 and a connection portion 81 that extends in the left-right direction and connects the lower ends of the hooks 80.
  • the hooks 80 have an outer vertical portion 80A extending upward from the outer end of the connection portion 81, a lower horizontal portion 80B extending from the outer vertical portion 80A toward the inside of the seat, an inner vertical portion 80C extending upward from the inner end of the lower horizontal portion 80B, and an upper horizontal portion 80D extending outward from the inner vertical portion 80C.
  • the outer ends of the upper horizontal portions 80D are provided with anti-pullout portions 80E that extend downward toward the outside of the seat, bend at their extending ends, and extend downward.
  • the connection portion 81 is provided with a hook 81A, and the hook 81A is hooked and fixed at a suitable position on the base lower member 16. As a result, the connection portion 81 is connected to the base lower member 16 (see FIG. 2).
  • the anti-removal portion 80E of the lower installation member 79 is inserted into the insertion hole 62 of the flange portion 60.
  • one end of the lower installation member 79 is prevented from falling out of the insertion hole 62, and one end of the lower installation member 79 is connected to the flange portion 60.
  • the flange portion 60 and the insertion hole 62 provided in the flange portion 60 form an attachment portion 82 for attaching one end of the lower installation member 79.
  • the member for connecting the movable frame 12 and the base frame 11 and the member for attaching the lower installation member 79 to the base frame 11 can be configured from a single pivot bracket 40 (attachment member), so there is no need to provide a separate member for connecting the lower installation member 79 to the base frame 11, and the number of parts in the seat 1 can be reduced.
  • one end of the lower installation member 79 is connected to the flange portion 60 of the pivot bracket 40. This increases the rigidity of the portion of the pivot bracket 40 where the lower installation member 79 is attached.
  • the front joints 58 are provided at the front and rear of the mounting portion 82. Therefore, compared to when the front joints 58 are provided only on one side, the front or rear, the pivot bracket 40 can be firmly joined to the front panel 20, and the lower installation member 79 can be stably supported by the front panel 20.
  • the rear surface of the lower pressure-bearing member 73 is provided with a number of hooks (not shown) that are hooked onto the lower installation member 79.
  • the lower pressure-bearing member 73 is connected to the lower installation member 79 by hooking the hooks onto the lower installation member 79.
  • the lower pressure-bearing member 73 is connected to each of the base side members 14 via the lower installation member 79.
  • the upper pressure-receiving member 74 is disposed at the upper rear of the back of the seated occupant and supports the load on the upper part of the back of the seated occupant. As shown in Fig. 2, the upper pressure-receiving member 74 is made of a plate-like member, similar to the lower pressure-receiving member 73. The upper pressure-receiving member 74 may be made of a resin plate-like member, or may be made of a metal plate material or the like.
  • the upper pressure receiving member 74 comprises a flat upper main part 84 having a front surface facing the front-rear direction, and a pair of left and right upper parts 85 provided on the left and right edges of the upper main part 84.
  • each of the upper parts 85 is flat and connected to the outer edge of the seat of the upper main part 84 (i.e., the left and right side edges), and extend forward toward the outside of the seat. This gives the upper pressure receiving member 74 a shape that fits along the back of the seated occupant.
  • each movable side member 38 is provided with an upper installation member 87 for connecting the upper pressure-receiving member 74 to the movable side member 38.
  • the upper installation member 87 is composed of a pair of left and right side frames 88.
  • the side frames 88 are composed of bent metal rod-shaped members (round bars in this embodiment).
  • the side frames 88 may also be composed of metal pipe material.
  • the side frame 88 has an upper vertical portion 88A that extends vertically, an inclined portion 88B that slopes downward from the lower end of the upper vertical portion 88A toward the inside of the seat, a lower vertical portion 88C that extends downward from the lower end of the inclined portion 88B, and a lower horizontal portion 88D that extends from the lower end of the lower vertical portion 88C toward the outside of the seat.
  • Each movable side member 38 is provided with a mounting bracket 90 for attaching the upper installation member 87.
  • the mounting bracket 90 is located in the center of the movable side member 38, and more specifically, is fixed to the upper part of the movable member side part 41.
  • the mounting bracket 90 is made of a bent sheet metal member, and is fixed to the upper part of the movable member side part 41 by welding.
  • the mounting bracket 90 has a flange portion 91, similar to the lower installation member 79.
  • the flange portion 91 is plate-shaped with a main surface facing in the vertical direction.
  • the flange portion 91 has a mounting hole 92 that penetrates in the vertical direction.
  • the upper end of the upper vertical portion 88A of the upper installation member 87 is inserted into the mounting hole 92.
  • the mounting bracket 90 constitutes the part that connects the upper installation member 87 and the movable frame 12.
  • the upper edge of the upper vertical portion 88A is provided with a horizontally bent portion 93 to prevent the upper vertical portion 88A from slipping out of the mounting hole 92.
  • the side frames 88 are each connected to the movable side members 38, and the upper installation member 87 is connected to and supported by the movable side member 38.
  • the rear surface of the upper pressure-receiving member 74 is provided with a number of hooks (not shown) that are hooked onto the upper installation member 87.
  • the upper pressure-receiving member 74 is connected to the front surface of the upper installation member 87, and is connected to and supported by the front side of the upper installation member 87.
  • the upper pressure-receiving member 74 is connected to each of the movable side members 38 via the upper installation members 87.
  • the lower installation member 79 is provided with a cylindrical tubular member 94 (also called a collar).
  • the upper installation member 87 is inserted into the tubular member 94 together with the lower installation member 79 at its lower edge (lower horizontal portion 88D) and is connected to the tubular member 94.
  • the upper pressure-receiving member 74 is connected to the lower installation member 79 so that it can be tilted in the front-rear direction.
  • the tubular member 94 functions as a connecting portion between the lower installation member 79 and the upper pressure-receiving member 74.
  • a slit (not shown) extending in the left-right direction may be provided on the rear surface of the tubular member 94.
  • the tubular member 94 may be made of metal, or may be made of resin, etc.
  • One end of the lower installation member 79 is inserted into the insertion hole 62 of the flange portion 60 to prevent it from coming loose. Therefore, the lower installation member 79 is supported by the flange portion 60 so that it can slide in the direction through the insertion hole 62. Therefore, when the upper installation member 87 is pulled upward, the lower installation member 79 can move accordingly.
  • the left upper portion 85 of the upper pressure receiving member 74 and the left movable member shoulder portion 42 of the movable side member 38 are positioned so that they are aligned vertically when viewed from the front.
  • the right upper portion 85 of the upper pressure receiving member 74 and the right movable member shoulder portion 42 of the movable side member 38 are positioned so that they are aligned vertically when viewed from the front.
  • the upper main portion 84 is positioned at the rear center of the back of the seated person, and the upper side portion 85 is positioned along the left and right sides of the back of the seated person.
  • the upper pressure-receiving member 74 can be positioned so as to fit along the back of the seated person.
  • each upper portion 85 is provided with a notch 95 that is cut upward. This allows the worker performing the assembly to see the pivot bracket 40 from the front when the movable portion 9 is in the upright position, improving the ease of assembly of the seat 1.
  • a first imaginary plane S1 along the front surface of the lower main part 76 is shown by a two-dot chain line.
  • the tubular member 94 is located rearward of the first imaginary plane S1.
  • the tubular member 94 is disposed rearward of the lower main part 76, and the lower installation member 79 and the upper pressure-receiving member 74 are connected rearward of the lower main part 76. This makes it possible to prevent a seated occupant from feeling a foreign body sensation due to the connection between the lower installation member 79 and the upper pressure-receiving member 74.
  • the second imaginary plane S2 along the front surface of the upper main part 84 is shown by a dashed line.
  • the tubular member 94 is located rearward of the second imaginary plane S2.
  • the tubular member 94 is disposed rearward of the upper main part 84, and the lower installation member 79 and the upper pressure-receiving member 74 are connected rearward of the upper main part 84. This makes it possible to prevent the seated occupant from feeling a foreign body sensation due to the connection between the lower installation member 79 and the upper pressure-receiving member 74.
  • the lower pressure receiving member 73 may not be connected to the movable frame 12, but may be connected only to the base frame 11 and supported only by the base frame 11.
  • the upper pressure receiving member 74 may not be connected to the base frame 11, but may be connected only to the movable frame 12 and supported only by the movable frame 12. This allows the lower pressure receiving member 73 to rotate relative to the movable frame 12, and the upper pressure receiving member 74 to rotate relative to the base frame 11. This makes it possible to configure a pressure receiving member 72 that can further reduce the effects of tilting of the movable frame 12.
  • the seat back 5 includes an actuator 98 for tilting (rotating) the movable portion 9.
  • the actuator 98 is provided between the base frame 11 and the movable frame 12.
  • the actuator 98 includes a motor 98A, a lead screw 98B, and a gear box 98C that converts the rotation of the motor 98A into linear motion of the lead screw 98B.
  • the gear box 98C includes a gear and a housing that accommodates the gear.
  • the housing has a through hole that allows the lead screw 98B to pass through.
  • the output shaft of the motor 98A rotates, one end of the lead screw 98B protrudes or retracts, and moves toward or away from the housing.
  • the axial direction of the output shaft of the motor 98A and the axial direction of the lead screw 98B are configured to be perpendicular to each other.
  • a connecting member 100 is fixed to the movable upper member 39, and the lead screw 98B is connected at its end to the connecting member 100 so that it can rotate about the axis Y extending in the left-right direction.
  • the actuator 98 is connected at the end (the upper end in FIG. 2) of the lead screw 98B so that it can rotate about the axis Y extending in the left-right direction to the movable upper member 39.
  • the connecting member 100 is fixed to the movable upper member 39, the actuator 98 is connected to the portion between the two movable member bends 43 of the movable frame 12. As shown in FIG. 3A, the connection portion between the actuator 98 and the movable frame 12 is located between the headrest bends 70 in a front view.
  • the gearbox 98C is connected to the first connecting bracket 102 so as to be rotatable about axis Z, which extends in the left-right direction.
  • the first connecting bracket 102 is fixed to the second connecting bracket 103, which is fixed to the base upper member 15.
  • the gearbox 98C is connected to the base upper member 15 so as to be rotatable about axis Z, which extends in the left-right direction.
  • one end of the actuator 98 (corresponding to the end of the gear box 98C) is connected to the base upper member 15 so as to be rotatable about the axis Z extending in the left-right direction.
  • the other end of the actuator 98 (corresponding to the lead screw 98B) is connected to the movable upper member 39 so as to be rotatable about the axis Y extending in the left-right direction. Therefore, the movable side member 38 and the corresponding base side member 14, one end of the actuator 98 and the base upper member 15, and the other end of the actuator 98 and the movable upper member 39 are connected so as to be rotatable about the axes Y and Z extending in the left-right direction, respectively. As a result, the actuator 98 connects the base upper member 15 and the movable upper member 39, and by driving the actuator 98, the movable upper member 39 can be rotated to move closer to and away from the base upper member 15.
  • the actuator 98 is configured to move the movable upper member 39 toward and away from the base upper member 15, but this is not limited to the above. Specifically, the actuator 98 only needs to be connected to the upper part of the base frame 11 other than the base upper member 15 (more specifically, the part above the rotation axis X) and the movable upper member 39, and may be configured to move the movable upper member 39 toward and away from the upper part of the base frame 11 at least in one of these ways.
  • the actuator 98 tilts the movable frame 12 relative to the base frame 11, displacing (more specifically, rotating) the movable part 9 between the forward tilt position and the upright position.
  • At least one of the base frame 11 and the movable frame 12 is provided with a receiving recess 105 that receives at least a portion of the actuator 98.
  • the receiving recess 105 is provided on the front surface of the base upper member 15, in the center in the left-right direction.
  • the receiving recess 105 is formed as a recess recessed rearward (in the direction away from the movable upper member 39) on the front surface of the base upper member 15.
  • At least a portion of the actuator 98 e.g., a portion of the motor 98A or the lead screw 98B
  • the receiving recess 105 is located on the front surface of the base upper member 15, where the front panel 20 and the rear panel 21 face each other in the front-to-rear direction and overlap each other in the front-to-rear direction.
  • the gearbox 98C is journaled to the first connecting bracket 102.
  • the second connecting bracket 103 is U-shaped and opens toward the rear.
  • the second connecting bracket 103 is joined (welded in this embodiment) to the top surface and front surface (bottom surface of the receiving recess 105) of the portion of the base upper member 15 where the receiving recess 105 is provided.
  • the first connecting bracket 102 is connected to the front surface of the second connecting bracket 103.
  • the second connecting bracket 103 is connected to the seat back frame 10 at a position where the front panel 20 and rear panel 21 face each other.
  • the actuator 98 is supported via the second connecting bracket 103 at a position where the front panel 20 and rear panel 21 of the seat back frame 10 face each other. This allows the actuator 98 to be supported on a part of the base frame 11 that is highly rigid and difficult to deform.
  • the actuator 98 is connected to the movable upper member 39, i.e., the portion between the two movable member bends 43 of the movable frame 12. Therefore, the connection portion between the actuator 98 and the movable frame 12 can be positioned closer to the center of the seat in the left-right direction. This allows the actuator 98 to rotate (tilt) the movable frame 12 more stably than when, for example, the actuator 98 is connected to the movable side member 38.
  • the second connecting bracket 103 is provided at a position biased to one side in the left-right direction of the receiving recess 105. Therefore, the lead screw 98B is disposed at a position biased to one side in the left-right direction (the vehicle exterior side in this embodiment) in the receiving recess 105. This arrangement ensures that there is sufficient space to accommodate the motor 98A between the lead screw 98B and the wall surface that defines the edge of the receiving recess 105 on the other left-right side (the vehicle interior side in this embodiment).
  • the seat 1 is equipped with a seat belt device 200 for ensuring the safety of an occupant, which includes a seat belt 202 with a tongue 201, a buckle 203 into which the tongue 201 is inserted, a seat belt retractor 204 (see Figure 2) that retracts the seat belt 202, and a seat belt guide 205 through which the seat belt 202 is inserted.
  • a seat belt device 200 for ensuring the safety of an occupant, which includes a seat belt 202 with a tongue 201, a buckle 203 into which the tongue 201 is inserted, a seat belt retractor 204 (see Figure 2) that retracts the seat belt 202, and a seat belt guide 205 through which the seat belt 202 is inserted.
  • the seat belt retractor 204 has a device body 207 that automatically retracts and stores the seat belt 202, and a retainer 208 that supports the device body 207.
  • the retainer 208 is made of a plate-shaped sheet metal member, and the device body 207 is fixed to one side of the retainer 208.
  • the base frame 11 is provided with a device mounting bracket 210 for mounting the seat belt retractor 204.
  • the device mounting bracket 210 is fixed to the upper outside of the base frame 11.
  • the device mounting bracket 210 has a bracket fixing portion 211 and a bracket extension portion 212.
  • the bracket fixing portion 211 is arranged to cover the seat outer surface of the base side member 14 on the vehicle exterior side and the vehicle exterior edge of the upper surface of the base upper member 15.
  • the bracket fixing portion 211 is fixed by welding to the base side member 14 and the base upper member 15.
  • the bracket extension portion 212 is plate-shaped with a surface facing the front-rear direction.
  • the bracket extension portion 212 extends downward from the bracket fixing portion 211 at an angle toward the inside of the seat.
  • the bracket fixing portion 211 has a hook hole 214 that penetrates through the thickness direction at the extending end.
  • a bead (hereinafter referred to as the upper bead 216) is provided at approximately the center of the bracket fixing portion 211 in the extending direction.
  • the retainer 208 overlaps the bracket fixing portion 211 and the upper middle member 17U from the rear side, and is positioned so as to straddle both.
  • the retainer 208 has a surface facing the front-rear direction, and extends so as to incline downward toward the inside of the seat.
  • the upper end of the retainer 208 is provided with a hook 218 (also called a hook portion) that is hooked into the hook hole 214.
  • the hook 218 may be formed of a protrusion that protrudes toward the bracket fixing portion 211.
  • middle member connection portion 220 The portion of the upper middle member 17U that overlaps with the retainer 208 (hereinafter, middle member connection portion 220) has a through hole (hereinafter, panel side mounting hole 222) that penetrates in the thickness direction.
  • the middle member connection portion 220 is formed by overlapping the front panel 20 and the rear panel 21, and the panel side mounting hole 222 penetrates the front panel 20 and the rear panel 21.
  • the retainer 208 has an equipment-side mounting hole 224 that passes through it at a position that aligns with the panel-side mounting hole 222.
  • a nut 227 is fitted onto a bolt 226 that passes through the panel-side mounting hole 222 and the equipment-side mounting hole 224, connecting the lower end portion of the retainer 208 to the middle member connecting portion 220.
  • the bolt 226 may be inserted from the rear of the upper middle member 17U, and the nut 227 may be tightened from the front, thereby fastening and fixing the lower end portion of the retainer 208 and the middle member connecting portion 220.
  • a bead (hereinafter, lower bead 230) is provided in the lower portion of the panel side mounting hole 222 of the upper middle member 17U. As shown in FIG. 13, the lower bead 230 is formed by overlapping a bead formed on the front panel 20 (hereinafter, front lower bead 230F) and a bead formed on the rear panel 21 (hereinafter, rear lower bead 230R).
  • the upper bead 216, the front lower bead 230F, and the rear lower bead 230R each function as a rearward movement promoting portion that moves the seat belt retractor 204 rearward when an excessive load is input from the occupant side.
  • the upper bead 216 may be configured to be more easily deformed (more fragile) than either the front lower bead 230F or the rear lower bead 230R, or may be configured to be less easily deformed (more rigid).
  • the upper bead 216 may be configured by a portion of the device mounting bracket 210 that is bent in a wavy or convex shape.
  • the front lower bead 230F may be configured by a portion of the front panel 20 that is bent in a wavy or convex shape
  • the rear lower bead 230R may be configured by a portion of the rear panel 21 that is bent in a wavy or convex shape.
  • the seat back frame 10 is provided with a guide mounting bracket 232 for attaching the seat belt guide 205.
  • the guide mounting bracket 232 is made of a bent sheet metal member.
  • the guide mounting bracket 232 is positioned so as to cover the bracket fixing portion 211 of the device mounting bracket 210, and is fixed to the bracket fixing portion 211 of the device mounting bracket 210 (and/or the base frame 11) by welding.
  • the movable member shoulder 42 is located behind the pivot bracket 40 in a top view. Also, at least a part of the movable member shoulder 42 is located in front of the mounting bracket 90 (a portion where the upper installation member 87 and the movable frame 12 are connected). However, the entire movable member shoulder 42 may be located in front of the mounting bracket 90. Also, at least a part of the mounting bracket 90 is located in front of the actuator 98, and preferably the entire mounting bracket 90 is located in front of the actuator 98.
  • the standing position can be set to an appropriate position where the movable part 9 does not tilt too far forward or backward, allowing a large occupant to sit comfortably.
  • the mounting bracket 90 is located in front of the actuator 98 and the upper pressure-receiving member 74 is supported on the front side of the upper installation member 87, the upper pressure-receiving member 74 is positioned in front of the actuator 98. This makes it possible to prevent the actuator 98 from giving a foreign body sensation to the seated occupant.
  • the forward leaning position can be set to an appropriate position that can support the back of a relatively small seated occupant.
  • the upper main section 84 and the left and right upper sections 85 of the upper pressure-receiving member 74 are each located above the rotation axis X (see also Figure 4).
  • the upper pressure-receiving member 74 can be rotated so that its upper part protrudes forward and stands upright from a position where it is tilted backward (see Figure 16), and therefore the upper pressure-receiving member 74 can be supported by the movable frame 12 so that it can support the back of a small seated person by rotating the movable frame 12.
  • the actuator 98 when the movable part 9 is in either the upright position or the forward tilted position, at least a part of the actuator 98 is located behind the upper pressure receiving member 74. In addition, at least a part of the actuator 98 is located behind the headrest frame 64.
  • the upper end of the seat belt retractor 204 is located below the upper end of the movable frame 12 and above the lower end of the movable frame 12.
  • at least a part of the seat belt retractor 204 is disposed between the upper and lower edges of the movable frame 12 in the vertical direction.
  • at least a part of the seat belt retractor 204 is disposed at the same height as the movable frame 12 in the vertical direction.
  • the seat belt retractor 204 is provided at a position offset toward the vehicle exterior side from the center line of the seat 1.
  • the seat belt retractor 204 is located on the seat inner side of the movable side member 38 located on the vehicle exterior side in a front view.
  • the left-right center part of the seat belt retractor 204 is located on the seat inner side of the movable side member 38 located on the vehicle exterior side in a front view, and it is more preferable that the seat outer end of the seat belt retractor 204 (i.e., the entire seat belt retractor 204) is located on the seat inner side of the movable side member 38 located on the vehicle exterior side in a front view.
  • the lower end of the seat belt retractor 204 is located below the movable member bent part 43 in a front view when the movable part 9 is in the upright position.
  • the upper end of the seat belt retractor 204 i.e., the entire seat belt retractor 204 is located below the movable member bent part 43 in a front view when the movable part 9 is in the upright position.
  • the end of the seat belt retractor 204 on the inside of the seat is located outside the seat relative to the connection between the actuator 98 and the movable upper member 39. Also, when the movable part 9 is in the upright position, it is preferable that the seat belt retractor 204 is located below the connection between the upper installation member 87 and the movable frame 12 (i.e., specifically, the left mounting bracket 90).
  • This arrangement allows the seat back to be constructed compactly.
  • the upper end of the seat belt retractor 204 is located above the upper pressure receiving member 74 in a front view and a side view.
  • the lower end of the seat belt retractor 204 i.e., the entire seat belt retractor 204 is located above the upper pressure receiving member 74 in a front view and a side view.
  • This arrangement allows the seat belt retractor 204 to be installed in a position where it is unlikely to be affected by the rotation of the movable frame 12.
  • At least a portion of the seat belt retractor 204 is located behind the front panel 20. This prevents the seat occupant from feeling like there is a foreign object in the seat compared to when the seat belt retractor 204 is located in front of the front panel 20.
  • the actuator 98 overlaps the guide mounting bracket 232 in a side view, and is provided at the same position in the front-to-rear direction.
  • the seat belt retractor 204 also overlaps the guide mounting bracket 232 in a side view, and is provided at the same position in the front-to-rear direction. This allows the actuator 98 to be arranged compactly.
  • the headrest frame 64 is located forward of the rear end of the guide mounting bracket 232 in the front-to-rear direction.
  • the rear end of the headrest frame 64 is between the front and rear ends of the seat belt retractor 204.
  • the manufacturing method of the seat 1 includes a first step of manufacturing the base frame 11, a second step of rotatably assembling the movable frame 12 to the base frame 11, a third step of assembling the upper installation member 87 and the lower installation member 79 to the first installation member and the second installation member, respectively, a fourth step of assembling the first installation member and the second installation member, and a fifth step of connecting the actuator 98 to the movable frame 12 and the base frame 11. After the fifth step, the headrest 6, the pad member, and the covering material are sequentially assembled.
  • the first process includes a process of manufacturing the front panel 20 and the rear panel 21 by press working, and a process of joining the front panel 20 and the rear panel 21 at their peripheral edges to form the base frame 11.
  • the front panel 20 and the rear panel 21 may be joined by welding, or may be joined by fastening with bolts and nuts.
  • the first step may include a step of inserting and fixing the stud bolt 52 into the first through hole 53 of the front panel 20. This step may be performed before the step of joining the front panel 20 and the rear panel 21.
  • the first step may also include a step of fixing (in this embodiment, welding) the second connecting bracket 103 to the base upper member 15. This step may be performed after the front panel 20 and the rear panel 21 are joined. In this step, the second connecting bracket 103 may be joined (welded) to the upper and lower surfaces of the base upper member 15.
  • the second step includes a step of fixing the connecting member 100 to the movable frame 12 by welding or the like, a step of fixing the headrest frame 64 to the movable frame 12, a step of rotatably connecting the movable frame 12 to the pivot bracket 40, and a step of fixing the pivot bracket 40 to the base frame 11.
  • the step of fixing the headrest frame 64 to the movable frame 12 includes a step of connecting (in this embodiment, welding) the lower end of the vertical portion 65 to the movable member bent portion 43 of the movable frame 12.
  • the step of rotatably connecting the movable frame 12 to the pivot bracket 40 includes a step of inserting a pin 49 into a through hole 48 provided at the lower end of the movable side member 38, and rotatably connecting the lower end of the movable side frame to the bulge portion 45B of the pivot bracket 40.
  • the process of fixing the pivot bracket 40 to the base frame 11 may include a process of positioning the pivot bracket 40 by inserting a stud bolt 52 provided in a first through hole 53 of the front panel 20 into the front bolt hole 50A, and then a process of inserting a bolt 56 into the rear bolt hole 50B and the second through hole 54 of the pivot bracket 40 and connecting a nut 57 to connect (in this embodiment, fasten) the pivot bracket rear part 46 and the front panel 20. This allows the worker to first position the pivot bracket 40, and then connect the pivot bracket 40 to the base frame 11, making the assembly process easier.
  • the process of fixing the pivot bracket 40 to the base frame 11 may also include a process of connecting the pivot bracket front portion 45 to the front panel 20 by attaching nuts 55 to the stud bolts 52.
  • the third step may include a step of connecting the hook provided on the rear surface of the upper pressure-receiving member 74 to the upper installation member 87, and a step of connecting the hook provided on the rear surface of the lower pressure-receiving member 73 to the lower installation member 79.
  • the third step may include a step of connecting the upper installation member 87 and the lower installation member 79 with a tubular member 94.
  • the fourth step includes inserting the end of the upper installation member 87 from below into the mounting hole 92 provided in the flange portion 91 of the mounting bracket 90, and inserting the end of the lower installation member 79 from above into the insertion hole 62 provided in the flange portion 60 of the pivot bracket 40.
  • the worker may insert the end of the upper installation member 87 above the position where it will be located after installation (also called overstroking), and then insert the end of the lower installation member 79 from above into the insertion hole 62. This allows the lower installation member 79 to be installed after the upper installation member 87 is assembled, improving the ease of assembly.
  • the fifth step includes a step of rotatably connecting the first connecting bracket 102 to the gear box 98C, a step of fixing the first connecting bracket 102 to the second connecting bracket 103, and a step of rotatably connecting the end of the lead screw 98B to the connecting member 100.
  • the actuator 98 is connected to the base frame 11 and the movable frame 12.
  • a sixth step may be included in which the seat belt retractor 204 is assembled to the seat back frame 10.
  • the device body 207 of the seat belt retractor 204 is previously connected to the retainer 208, and the device mounting bracket 210 and the guide mounting bracket 232 are each fixed to the base frame 11 by welding or the like after the first step.
  • the sixth step includes a step in which, after the hook 218 of the retainer 208 is hooked to the hook hole 214, the worker positions the retainer 208 so that the panel-side mounting hole 222 and the device-side mounting hole 224 overlap, a step in which the bolt 226 passes through the panel-side mounting hole 222 and the device-side mounting hole 224, and a step in which the nut 227 is connected to the bolt 226 to fasten the retainer 208 to the upper middle member 17U (middle member connecting portion 220).
  • the retainer 208 By connecting the retainer 208 to the upper middle member 17U, the seat belt retractor 204 can be assembled to the seat back frame 10.
  • the seat belt guide 205 may be attached to the guide mounting bracket 232 when the headrest 6, padding, and covering material are assembled in sequence, or the seat belt guide 205 may be attached to the guide mounting bracket 232 after the padding and covering material are assembled in sequence.
  • the pressure-receiving member 72 that supports the weight of a seated occupant includes a lower pressure-receiving member 73 provided on the base frame 11 and an upper pressure-receiving member 74 provided on the movable frame 12. Therefore, compared to when the upper pressure-receiving member 74 and the lower pressure-receiving member 73 are configured as one unit, stress is less likely to occur inside the pressure-receiving member 72, and the pressure-receiving member 72 is more likely to follow the tilt of the movable part 9.
  • the upper installation member 87 is connected to the lower installation member 79 via a tubular member 94. Therefore, the upper pressure-receiving member 74 is connected to the lower installation member 79 so that it can tilt in the front-rear direction. This allows the upper pressure-receiving member 74 to be well supported by the movable frame 12 at the top and bottom, and allows the upper pressure-receiving member 74 to well follow the tilt of the movable frame 12.
  • the base frame 11 (base upper member 15) is provided with a receiving recess 105 that receives at least a portion of the actuator 98.
  • a space for accommodating functional components can be formed within the receiving recess 105.
  • the actuator 98 and the base frame 11 are arranged so as to overlap in a side view. This allows the actuator 98 to be arranged compactly (i.e., so that the thickness of the upper part of the seatback frame 10 is reduced).
  • the actuator 98 is disposed between the base frame 11 and the movable frame 12. Therefore, by forming the receiving recess 105 so that it is recessed rearward on the front surface of the base upper member 15, the actuator 98 can be easily accommodated in the receiving recess 105.
  • the headrest frame 64 is connected to the rear surface of the movable frame 12 and is supported by the movable frame 12. Therefore, the connection portion of the headrest frame 64 to the movable frame 12 does not protrude forward beyond the movable frame 12. This makes it possible to connect the headrest frame 64 to the movable frame 12 while preventing the seated occupant from feeling a foreign body sensation.
  • the movable frame 12 is connected to the front panel 20 via a pivot bracket 40, and the airbag module 24 is connected to the rear panel 21.
  • the movable frame 12 and the airbag module 24 can be more easily positioned apart than when they are provided on the same panel. This makes it less likely that the rotation of the movable frame 12 will affect the airbag module 24.
  • the airbag 25 can be deployed satisfactorily, improving the safety of the seat 1.
  • the pivot bracket 40 is located above the connection portion (rear connection portion 32) of the rear panel 21 with the airbag module 24.
  • the connection portion (front connection portion 58) of the front panel 20 with the movable frame 12 is located above the connection portion (rear connection portion 32) of the rear panel 21 with the airbag module 24. Therefore, since the movable frame 12 and the airbag module 24 are connected at positions spaced apart in the vertical direction of the base frame 11, the deployment of the airbag 25 is prevented from being hindered by the movable frame 12.
  • the movable portion 9 is in the forward tilt position or the upright position, at least a portion of the actuator 98 is located behind the upper pressure-receiving member 74. Therefore, it is possible to prevent the actuator 98 from giving a foreign body sensation to the seated occupant, compared to when the actuator 98 is entirely located in front of the upper pressure-receiving member 74.
  • the upper end of the seat belt retractor 204 is located below the upper end of the movable frame 12 and above the lower end of the movable frame 12, and at least a portion of the seat belt retractor 204 is disposed at the same height as the movable frame 12 in the vertical direction. Therefore, the seat back 5 (i.e., the seat 1) can be configured to be more compact in the vertical direction than if the entire seat belt retractor 204 were disposed above the movable frame 12.
  • the pressure receiving member 72 is described as being composed of the upper pressure receiving member 74 and the lower pressure receiving member 73, but the pressure receiving member 72 may be composed of two or more plate members arranged substantially parallel to the backrest surface 5S.
  • each of the plate members may be joined at both ends to either the seat back frame 10 or the movable frame 12, and may be rotatably connected to the adjacent plate members around a rotation axis X extending in the left-right direction.
  • the receiving recess 105 is provided in the base frame 11, but it may be provided in the movable frame 12. In that case, the receiving recess 105 is formed in the movable upper frame so as to be recessed forward, and at least a portion of the lead screw 98B is housed in the receiving recess 105. Alternatively, the receiving recess 105 may be provided in each of the base frame 11 and the movable frame 12. In the above embodiment, an example in which the actuator 98 is housed in the receiving recess 105 has been described, but it is possible to house various functional parts other than the actuator 98 in the receiving recess 105.
  • the seat 1 according to the present invention can also be applied to various seats for aircraft, trains, etc. Furthermore, not all of the components of the seat 1 shown in the above embodiment are necessarily required, and can be selected as appropriate.

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  • Engineering & Computer Science (AREA)
  • Aviation & Aerospace Engineering (AREA)
  • Transportation (AREA)
  • Mechanical Engineering (AREA)
  • Seats For Vehicles (AREA)
PCT/JP2024/043275 2023-12-06 2024-12-06 乗物用シート Pending WO2025121421A1 (ja)

Priority Applications (1)

Application Number Priority Date Filing Date Title
JP2025562263A JPWO2025121421A1 (https=) 2023-12-06 2024-12-06

Applications Claiming Priority (2)

Application Number Priority Date Filing Date Title
US202363606828P 2023-12-06 2023-12-06
US63/606,828 2023-12-06

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Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0924756A (ja) * 1995-07-03 1997-01-28 Bertrand Faure Equip Sa 車両の座席背もたれのフレーム、および該フレームをもつ車両の座席
FR2894194A1 (fr) * 2005-12-06 2007-06-08 Renault Sas Siege de vehicule comportant une partie reglable en position
JP2009269477A (ja) * 2008-05-08 2009-11-19 Mazda Motor Corp 車両のシート装置
JP2020199923A (ja) * 2019-06-11 2020-12-17 トヨタ紡織株式会社 乗物用シート

Patent Citations (4)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPH0924756A (ja) * 1995-07-03 1997-01-28 Bertrand Faure Equip Sa 車両の座席背もたれのフレーム、および該フレームをもつ車両の座席
FR2894194A1 (fr) * 2005-12-06 2007-06-08 Renault Sas Siege de vehicule comportant une partie reglable en position
JP2009269477A (ja) * 2008-05-08 2009-11-19 Mazda Motor Corp 車両のシート装置
JP2020199923A (ja) * 2019-06-11 2020-12-17 トヨタ紡織株式会社 乗物用シート

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