WO2018025447A1 - Seat back frame and seat back - Google Patents

Seat back frame and seat back Download PDF

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Publication number
WO2018025447A1
WO2018025447A1 PCT/JP2017/014206 JP2017014206W WO2018025447A1 WO 2018025447 A1 WO2018025447 A1 WO 2018025447A1 JP 2017014206 W JP2017014206 W JP 2017014206W WO 2018025447 A1 WO2018025447 A1 WO 2018025447A1
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WO
WIPO (PCT)
Prior art keywords
plate
frame
seat back
pair
center
Prior art date
Application number
PCT/JP2017/014206
Other languages
French (fr)
Japanese (ja)
Inventor
勤 藤掛
和善 荒田
藤田　大輔
Original Assignee
株式会社タチエス
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 株式会社タチエス filed Critical 株式会社タチエス
Priority to JP2018531739A priority Critical patent/JPWO2018025447A1/en
Publication of WO2018025447A1 publication Critical patent/WO2018025447A1/en

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Classifications

    • A—HUMAN NECESSITIES
    • A47—FURNITURE; DOMESTIC ARTICLES OR APPLIANCES; COFFEE MILLS; SPICE MILLS; SUCTION CLEANERS IN GENERAL
    • A47C—CHAIRS; SOFAS; BEDS
    • A47C7/00—Parts, details, or accessories of chairs or stools
    • A47C7/36—Support for the head or the back
    • A47C7/40—Support for the head or the back for the back
    • 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 seat back frame and a seat back.
  • the present invention relates to a seat back frame and a seat back that can improve sitting comfort while reducing the number of parts.
  • the seat back frame of a vehicle seat mounted on an automobile, etc. supports the back of the upper body of the seated person with a support, and changes the amount of pushing the support to the seated person, so that the seated person's preference can be changed.
  • a device that adjusts the supportability of a seated person by a support is known (Patent Document 1).
  • the support body of patent document 1 is provided with the support plate which supports a seated person's waist, and the spring which supports a seated person's back.
  • An object of this invention is to provide the seat back frame and seat back which can improve a seating comfort, reducing a number of parts.
  • the seat back frame of the present invention is integrated with the side frame by connecting a pair of synthetic resin side frames arranged at a predetermined interval on the left and right sides and the upper part of the side frame.
  • a moving part that moves the contact part in at least one of the vertical direction and the front-rear direction.
  • the synthetic resin back plate between the pair of side slits is pushed by the contact portion moved by the moving portion. Therefore, the back plate between the side slits can be smoothly bent and deformed in the vertical direction. Thereby, it can suppress that the load from a back surface board concentrates on a seated person's back partly. As a result, the uncomfortable feeling at the time of sitting can be suppressed and the sitting comfort can be improved.
  • the side frame, the upper frame, and the back plate are integrally molded products made of synthetic resin, the number of parts can be reduced compared to the case of assembling a plurality of members. As a result, the seating comfort can be improved while reducing the number of parts.
  • the rear plate penetrates below the position where the contact portion contacts in the plate thickness direction, and the lower slit is formed.
  • a pair of side slits and a lower slit are continuous.
  • the back plate includes the low-rigidity portion having lower bending rigidity in the front-rear direction than the portion continuous upward between the pair of side slits. Since the back plate can be easily bent and deformed starting from the low-rigidity portion, it is possible to specify how the back plate is deformed by the position of the low-rigidity portion. Therefore, in addition to the effect of the first or second aspect, the degree of freedom of deformation of the back plate between the pair of side slits can be further improved.
  • the back plate includes a through hole that penetrates between the pair of side slits in the plate thickness direction. Since the bending rigidity of the back plate is lowered by the through hole, the back plate can be easily bent and deformed from the through hole. Since the way of deformation of the back plate can be specified by the position of the through hole, the degree of freedom of deformation of the back plate can be further improved.
  • the back plate When the through hole and the side slit are continuous, the back plate is easily twisted above and below the through hole. Therefore, the back plate may be bent starting from the through hole. Since the through hole and the side slit are discontinuous, the back plate can be prevented from being twisted above and below the through hole, and the back plate can be prevented from being bent. As a result, in addition to the effect of any one of claims 1 to 3, the degree of freedom of deformation of the back plate can be further improved by the through-hole while ensuring the durability of the back plate.
  • the back pad is supported by the seat back frame according to any one of claims 1 to 4.
  • the center of the back surface of the seated person is supported by the center portion of the back pad.
  • Side portions provided on both sides in the left-right direction of the center portion project toward the seated person side with respect to the center portion. For this reason, the side portion can suppress the shaking of the seated person in the left-right direction.
  • the side slit overlaps the boundary between the center portion and the side portion in a front view. Or a side part slit is located in the center part side rather than the boundary of a center part and a side part in front view.
  • a center part can be pushed to a seated person side with a backplate.
  • the seated person can be supported by the back plate through the center part while suppressing the shape change of the side part. Therefore, in addition to the effect of any one of Claims 1 to 4, the support performance of the seated person by the back plate can be adjusted while suppressing the change in the swinging performance of the seated person by the side part.
  • FIG. 4 is an end view of the cut portion of the seat back frame taken along line IV-IV in FIG. 3.
  • FIG. 5 is a cutaway end view of the seat back taken along line VV in FIG. 1.
  • FIG. 7 is a cutaway end view of the seat back frame taken along line VII-VII in FIG. 6.
  • FIG. 9 is a cutaway end view of the seat back frame taken along line IX-IX in FIG. 8.
  • FIG. 9 is an end view of the cut portion of the seat back frame taken along line XX in FIG. 8.
  • FIG. 1 is a perspective view of a vehicle seat 1 according to the first embodiment of the present invention.
  • the vehicle seat 1 is a seat mounted on an automobile or the like.
  • the vehicle seat 1 includes a seat cushion 2, a seat back 3, and a headrest 4.
  • a seat back 3 is disposed at the rear end of the seat cushion 2.
  • a headrest 4 is attached to the upper end of the seat back 3. When a seated person sits on the seat cushion 2, the seat back 3 becomes the back of the seated person.
  • the headrest 4 supports the seated person's head.
  • FIG. 10 The seat back frame 10 (hereinafter referred to as “frame 10”), which is the frame of the seat back 3, will be described with reference to FIGS.
  • FIG. 2 is a perspective view of the frame 10.
  • FIG. 3 is a front view of the frame 10.
  • illustration of the reclining apparatus 5 is abbreviate
  • the frame 10 includes a pair of side frames 11, 12, an upper frame 13, and a back plate 14.
  • the pair of side frames 11 and 12 are parts arranged at a predetermined interval on the left and right.
  • the upper frame 13 is a member that connects the upper portions of the side frames 11 and 12.
  • the back plate 14 is a member disposed between the pair of side frames 11 and 12.
  • the side frames 11 and 12, the upper frame 13, and the back plate 14 are integrally molded products made of synthetic resin. Thereby, the number of parts of the frame 10 can be reduced as compared with the case where the side frames 11 and 12 and the upper frame 13 and the back plate 14 are separately provided and the plurality of members are assembled.
  • the fiber reinforced resin which compounded the reinforced fiber in the engineering resin is preferable.
  • the upper frame 13 is provided with a mounting hole 13a into which a pair of left and right rods (not shown) protruding downward from the headrest 4 are inserted.
  • a support plate 13 b is bridged between the side frames 11 and 12.
  • the support plate 13 b is located below the upper frame 13.
  • the support plate 13 b is integrally formed with the side frames 11 and 12 and the back plate 14.
  • the support plate 13b is provided with a support hole 13c at a position corresponding to the mounting hole 13a.
  • the headrest 4 can be stably attached to the frame 10 by inserting the rod of the headrest 4 into the attachment hole 13a and the support hole 13c.
  • the reclining device 5 that connects the rear end of the seat cushion 2 and the lower end of the seat back 3 is attached to the lower ends of the side frames 11 and 12.
  • the reclining device 5 is a device that adjusts the inclination angle of the seat back 3 with respect to the seat cushion 2.
  • the reclining device 5 is mainly composed of a steel material.
  • the back plate 14 is a panel whose side edges are connected to the side frames 11 and 12 and whose upper edge is connected to the upper frame 13.
  • the back plate 14 penetrates in the plate thickness direction to form a pair of left and right side slits 15 and a lower slit 16.
  • the pair of side slits 15 extend in the vertical direction, and are provided symmetrically with a predetermined interval on the left and right.
  • the lower slit 16 connects the lower ends of the pair of side slits 15. Thereby, the side slit 15 and the lower slit 16 form a continuous cut.
  • the back plate 14 has a central plate 17 that is surrounded by a side slit 15, a lower slit 16, and an imaginary line L 1 connecting the upper ends of the side slits 15.
  • a portion of the back plate 14 other than the central plate 17 is a peripheral plate 18.
  • the upper edge of the synthetic resin center plate 17 is continuous with the peripheral plate 18.
  • the side and lower edges of the central plate 17 are not continuous with the peripheral plate 18. Therefore, the central plate 17 can be easily bent and deformed by inputting a load to the central plate 17 in the thickness direction (front-rear direction).
  • the side slit 15 and the lower slit 16 preferably have a width of 5 mm or more and 10 mm or less.
  • the width of the side slit 15 and the lower slit 16 is smaller than 5 mm, the central plate 17 and the peripheral plate 18 may interfere with each other.
  • the width of the side slit 15 and the lower slit 16 is larger than 10 mm, the supportability of the seated person by the back plate 14 is deteriorated.
  • the center plate 17 and the peripheral plate 18 can hardly interfere with each other, and support for the seated person by the back plate 14 can be secured.
  • the side slit 15 and the lower slit 16 are provided when the back plate 14 is molded. It is also possible to provide the side slits 15 and the lower slits 16 by removing portions corresponding to the side slits 15 and the lower slits 16 after forming the back plate 14. When the side slits 15 and the lower slits 16 are provided after the back plate 14 is formed, the shape of the central plate 17 is restricted by the shape of the peripheral plate 18. Therefore, the freedom degree of the shape of the center board 17 is low.
  • the back plate 14 when the back plate 14 is molded, the side and lower edges of the central plate 17 and the peripheral plate 18 are not continuous.
  • the back plate 14 can be formed with the shape of the central plate 17 being greatly different from the shape of the peripheral plate 18. That is, the degree of freedom of the shape of the center plate 17 can be increased.
  • projection part 17a can be formed so that the downward side of the center board 17 may protrude in the convex arc shape toward the front with respect to the peripheral board 18.
  • FIG. The support of the seated person's waist can be improved by the overhanging portion 17a.
  • the frame 10 includes an extrusion mechanism 20 that pushes the central plate 17 against the peripheral plate 18.
  • the extrusion mechanism 20 includes a wire 21 and a moving unit 22.
  • the moving unit 22 is provided on the side frame 11.
  • the wire 21 is a member formed by bending a steel round bar.
  • the wire 21 is a member that spans the side frames 11 and 12.
  • the first end 21 a of the wire 21 is supported by the moving unit 22.
  • the second end 21 b of the wire 21 is rotatably supported by the side frame 12.
  • the wire 21 extends through the side slit 15 to the rear surface of the central plate 17.
  • the wire 21 is a contact portion 21 c whose center portion contacts the rear surface of the center plate 17.
  • the contact portion 21c is provided eccentric to the second end 21b.
  • the contact portion 21c contacts the lower edge side of the center plate 17 (the overhang portion 17a).
  • the moving unit 22 includes a plate 23, a rotating shaft 24, a rotating unit 25, and a driving unit 26.
  • the plate 23 is a steel member attached to the inside of the side frame 11 (side frame 12 side).
  • the rotating shaft 24 is a steel member that spans between the plate 23 and the side frame 11.
  • the rotating part 25 is a steel member that is rotatably supported by the rotating shaft 24.
  • the driving unit 26 is a device that drives the rotating unit 25.
  • the drive unit 26 is provided outside the side frame 11.
  • the driving unit 26 rotates the rotating unit 25 around the rotating shaft 24 by a motor (not shown) that is driven by operating a switch (not shown).
  • the plate 23 is formed with an arc-shaped long hole 27 centered on the rotating shaft 24.
  • the first end 21 a of the wire 21 is inserted into the long hole 27.
  • the first end 21 a of the wire 21 that passes through the long hole 27 is fixed to the rotating portion 25.
  • the axis of the rotating shaft 24 and the axis of the second end 21b are the same axis C1. Therefore, the drive unit 26 rotates the rotation unit 25 about the rotation shaft 24, whereby the wire 21 rotates about the second end 21b and the rotation shaft 24 (axial center C1).
  • the contact portion 21c eccentric with respect to the axis C1 moves on an arc centered on the axis C1. Since the first end 21 a of the wire 21 is inserted into the long hole 27, the rotation of the wire 21 (movement of the contact portion 21 c) is restricted by the long hole 27. 2 and 3, the first end 21 a of the wire 21 is located at the rear end of the long hole 27.
  • FIG. 4 is a cross-sectional end view of the frame 10 taken along the line IV-IV in FIG.
  • the contact portion 21 c and the center plate 17 in the case where the contact portion 21 c is located on the rearmost side are illustrated by solid lines.
  • the contact portion 21 c and the center plate 17 in the case where the contact portion 21 c is located on the most front side are illustrated by a two-dot chain line.
  • the upper edge of the center plate 17 is continuous with the peripheral plate 18, and the contact portion 21 c comes into contact with the rear surface of the center plate 17.
  • the center plate 17 can be prevented from being bent backward. Therefore, it is possible to ensure the supportability of the back surface of the seated person by the central plate 17. In particular, the supportability of the waist by the overhanging portion 17a can be secured.
  • the lower edge of the central plate 17 is not continuous with the peripheral plate 18 due to the lower slit 16. Therefore, if a seated person leans on the lower edge side of the center plate 17 with respect to the contact portion 21c, the center plate 17 is easily bent backward.
  • the contact portion 21 c contacts the lower edge side of the center plate 17. Therefore, even if a seated person leans against the seat back 3 having the frame 10, it is possible to suppress the entire center plate 17 from being bent. As a result, the supportability of the back surface of the seated person by the central plate 17 can be improved.
  • the center plate 17 When the contact part 21c is in the position of the solid line in FIG. 4, the center plate 17 is not pushed by the contact part 21c. By moving the contact portion 21c in the direction of arrow A about the axis C1 by the drive portion 26 (see FIG. 3), the center plate 17 is pushed by the contact portion 21c and deformed. When the contact portion 21c moves to the position of the two-dot chain line in FIG. 4, the center plate 17 is bent and deformed from the state indicated by the solid line to the state indicated by the two-dot chain line. In the state shown by the two-dot chain line, the center plate 17 is pushed out to the seated person side most.
  • the amount of extrusion of the central plate 17 to the seated person can be adjusted.
  • the supportability of the back surface of the seated person by the central plate 17 can be adjusted according to the seated person's preference.
  • the waist support by the overhanging portion 17a can be adjusted according to the preference of the seated person.
  • the upper edge of the synthetic resin center plate 17 is continuous with the peripheral plate 18.
  • the side and lower edges of the central plate 17 are not continuous with the peripheral plate 18 due to the side slits 15 and the lower slits 16. Therefore, the central plate 17 can be smoothly bent and deformed in the vertical direction. Thereby, since it can suppress that the load from the center board 17 concentrates partially on a seated person's back surface, the uncomfortable feeling at the time of seating can be suppressed. As a result, the sitting comfort of the vehicle seat 1 having the frame 10 can be improved.
  • the lower edge of the central plate 17 is not continuous with the peripheral plate 18 due to the lower slit 16
  • the lower edge of the central plate 17 can be largely separated from the peripheral plate 18. That is, the lower slit 16 can improve the degree of freedom of deformation of the center plate 17 and can easily deform the center plate 17 by bending.
  • FIG. 5 is a cutaway end view of the seat back 3 taken along the line VV in FIG.
  • the seat back 3 is formed such that the back pad 30 is supported by the frame 10 so as to cover the frame 10, and the back pad 30 is covered with a cover 31.
  • the cover 31 is a member mainly composed of fabric, synthetic leather, leather, or the like.
  • the back pad 30 is a foamed synthetic resin member such as flexible polyurethane foam having elasticity.
  • the back pad 30 is mainly provided on the seated person side of the frame 10.
  • the back pad 30 includes a center part 32 and side parts 33.
  • the center portion 32 is a central portion of the back pad 30 in the left-right direction.
  • the side portions 33 are portions provided on both sides of the center portion 32 in the left-right direction.
  • the center portion 32 is a cushion material that supports the center of the back side of the seated person.
  • the side portion 33 is a cushioning material that suppresses shaking of the seated person in the left-right direction.
  • the side part 33 projects to the seated person side with respect to the center part 32.
  • a groove 34 for hanging the cover 31 through a hook is formed at the boundary between the center portion 32 and the side portion 33.
  • the side slit 15 and the groove 34 overlap each other. Therefore, it is possible to suppress the side portion 33 from being pushed by the center plate 17 and to push the center portion 32 by the center plate 17. Thereby, a seated person can be supported via the center part 32 with the center board 17 adjusted according to the seated person's preference, suppressing the shape change of the side part 33.
  • FIG. As a result, it is possible to adjust the supportability of the seated person by the central plate 17 while suppressing the change of the seating person's shaking restraining performance by the side portion 33.
  • the center plate 17 It can suppress more that the side part 33 is pushed. As a result, it is possible to further suppress a change in seated person's shaking suppression performance by the side portion 33.
  • a seat back frame 40 (hereinafter referred to as “frame 40”) according to the second embodiment will be described with reference to FIGS.
  • frame 40 a seat back frame 40 (hereinafter referred to as “frame 40”) according to the second embodiment.
  • the first embodiment the case where the lower edge of the central plate 17 and the peripheral plate 18 are not continuous by the lower slit 16 has been described.
  • the second embodiment a case where the lower edge of the center plate 17 and the peripheral plate 18 are continuous will be described.
  • symbol is attached
  • FIG. 6 is a front view of the frame 40 in the second embodiment.
  • FIG. 7 is a sectional end view of the frame 40 taken along line VII-VII in FIG.
  • the contact portion 51 c and the center plate 43 when the contact portion 51 c is located on the rearmost side are illustrated by solid lines.
  • the contact part 51 c and the center plate 43 when the contact part 51 c is located on the most front side are illustrated by a two-dot chain line.
  • the back plate 41 of the frame 40 is a synthetic resin panel that is integrally formed with the side frames 11, 12 and the upper frame 13. Side edges of the back plate 41 are connected to the side frames 11 and 12. The upper edge of the back plate 41 is connected to the upper frame 13. The back plate 41 penetrates in the plate thickness direction to form a pair of left and right side slits 15.
  • the back plate 41 has a recess 42 that is recessed forward so as to connect the upper ends of the side slits 15.
  • a portion surrounded by the side slit 15, the concave portion 42, and the virtual line L ⁇ b> 2 connecting the lower ends of the side slit 15 is defined as a central plate 43.
  • a portion of the back plate 41 other than the central plate 43 is a peripheral plate 44.
  • the vertical dimension of the central plate 43 is set larger than the vertical dimension of the peripheral plate 44.
  • the extrusion mechanism 50 of the frame 40 includes a wire 51 and a moving unit 52.
  • the wire 51 is a member formed by bending a steel round bar.
  • the wire 51 is bridged over the side frames 11 and 12.
  • a first end 51 a of the wire 51 is rotatably supported by the side frame 11 while penetrating the side frame 11.
  • the second end 51 b of the wire 51 is rotatably supported by the side frame 12. Since the first end 51a and the second end 51b of the wire 51 have the same axis C2, the wire 51 can be rotated around the axis C2 of the first end 51a and the second end 51b.
  • the wire 51 extends to the rear surface of the central plate 43 through the side slit 15.
  • the wire 51 is a contact portion 51 c whose center portion contacts the rear surface of the center plate 43.
  • the contact portion 51c is provided eccentric to the first end 51a and the second end 51b.
  • the contact portion 51 c contacts the center of the center plate 43 in the vertical direction.
  • the moving part 52 is mainly made of steel and is provided outside the side frame 11.
  • the moving unit 52 includes a rotating unit 53, a lever 54, and a lock unit (not shown).
  • the rotating portion 53 is a member to which the first end 51 a of the wire 51 that penetrates the side frame 11 is fixed.
  • the lever 54 is a member that manually rotates the rotating portion 53 around the axis C2.
  • the lock portion is a member that locks the rotation of the rotation portion 53. Note that the rotation amount of the rotating unit 53 is limited about the axis C2.
  • the central plate 43 can be hardly bent. Therefore, even if a seated person leans against the seat back having the frame 40, the center plate 43 can be prevented from bending backward. Therefore, it is possible to ensure the supportability of the back surface of the seated person by the central plate 43.
  • the bending rigidity in the front-rear direction of the concave portion 42 is higher than that of the portion that continues below the concave portion 42.
  • a portion (lower edge of the recess 42) continuous below the recess 42 is a low-rigidity portion 45 having lower bending rigidity in the front-rear direction than the recess 42.
  • the axis C2 that is the rotation center of the contact portion 51c in the present embodiment is located above the axis C1 that is the rotation center of the contact portion 21c in the first embodiment (see FIG. 4).
  • the central plate 17 in the first embodiment mainly supports the seated person's waist.
  • the center plate 43 in the present embodiment mainly supports the back of the seated person.
  • frame 60 a seat back frame 60 (hereinafter referred to as “frame 60”) in the third embodiment will be described with reference to FIGS.
  • first and second embodiments the case where there is no through hole penetrating the central plates 17 and 43 in the plate thickness direction has been described.
  • second embodiments a case will be described in which there are through holes 63, 64, and 65 penetrating the central plate 62 in the thickness direction.
  • third embodiment a case will be described in which there are through holes 63, 64, and 65 penetrating the central plate 62 in the thickness direction.
  • symbol is attached
  • FIG. 8 is a front view of the frame 60 in the third embodiment
  • FIG. 9 is an end view of the cut portion of the frame 60 taken along the line IX-IX in FIG.
  • FIG. 10 is a sectional end view of the frame 60 taken along the line XX of FIG.
  • the air conditioner 80 is not shown.
  • FIG. 10 there is a gap corresponding to the rib 66 between the central plate 62 and the wire 71, and the central plate 62 and the wire 71 are shown in contact with each other for easy understanding.
  • the back plate 61 of the frame 60 is a synthetic resin panel that is integrally formed with the side frames 11, 12 and the upper frame 13. Side edges of the back plate 61 are connected to the side frames 11 and 12. The upper edge of the back plate 61 is connected to the upper frame 13.
  • the back plate 61 penetrates in the plate thickness direction to form a pair of left and right side slits 15 and a lower slit 16.
  • a portion surrounded by the side slit 15, the lower slit 16, and an imaginary line L ⁇ b> 1 connecting the upper ends of the side slits 15 is a central plate 62.
  • a portion of the back plate 61 other than the central plate 62 is referred to as a peripheral plate 18.
  • the central plate 62 is provided with through holes 63, 64, 65 extending in the left-right direction through the thickness direction.
  • the center plate 62 is provided with a pair of left and right ribs 66 that project from the rear surface of the center plate 62 and extend vertically.
  • the rib 66 is a part integrally formed with the center plate 62.
  • the ribs 66 are provided on the left and right sides of the through hole 64.
  • the through holes 63, 64, 65 are provided at the center in the left-right direction of the center plate 62.
  • the through holes 63, 64, 65 are set so as not to be continuous with the side slits 15.
  • the through-holes 63 and 64 are provided at two locations spaced apart above and below the central plate 62.
  • the through hole 65 is wider than the through holes 63 and 64 and is provided between the through holes 63 and 64.
  • the extrusion mechanism 70 of the frame 60 includes a wire 71 and a moving unit 72.
  • the wire 71 is a steel round bar.
  • the wire 71 is bridged between the side frames 11 and 12.
  • the wire 71 contacts the rear surface side (rib 66) of the central plate 62.
  • the moving unit 72 holds the wire 71 movably on the side frames 11 and 12.
  • the moving part 72 includes a rod 73, insertion parts 74 and 75, and a driving part 76.
  • the rod 73 is a steel round bar extending in the vertical direction.
  • the rod 73 is disposed inside the side frames 11 and 12. Both ends of the rod 73 are fixed to the side frames 11 and 12 via stopper portions 77.
  • the insertion portions 74 and 75 are steel members into which the rod 73 is inserted and both ends of the wire 71 are fixed. The insertion portions 74 and 75 move up and down along the rod 73.
  • the drive unit 76 is a device provided in the side frame 11.
  • the drive unit 76 is fitted into the side frame 11 by removing a part of the side frame 11.
  • the drive unit 76 moves the insertion unit 74 up and down along the rod 73 by a motor (not shown) that is driven by operating a switch (not shown).
  • the stopper portion 77 is a member that restricts the movement of the insertion portions 74 and 75 along the rod 73.
  • the center plate 62 can be bent so that the rib 66 side protrudes toward the seat occupant side with respect to the center in the left-right direction of the center plate 62.
  • the center plate 62 bent in this way can ensure the stability of the seated person against rolling.
  • an air conditioner 80 is attached to the rear surface of the back plate 61 (peripheral plate 18).
  • a duct 81 made of a flexible hose extends from the air conditioner 80 to the through hole 65.
  • a flange 82 is formed at the tip of the duct 81.
  • a flange 82 is attached to the rear surface of the central plate 62 at the periphery of the through hole 65 with a bolt (not shown) or the like.
  • the air conditioner 80 sends air sent from an air conditioner (not shown) of the vehicle body from the rear surface of the back plate 61 to the front surface via the duct 81 and the through hole 65.
  • the air conditioner 80 is not limited to the air sent from the air conditioning device of the vehicle body, and can also send the air inside the vehicle from the through hole 65 to the seated person via the duct 81. Thereby, the stuffiness of the back of the seated person can be suppressed.
  • the flange 82 of the duct 81 is not limited to being attached to the center plate 62. It is also possible to omit the flange 82 and arrange the tip of the duct 81 toward the through hole 65 without fixing the duct 81 to the central plate 62.
  • the center plate 62 is provided with the through holes 63 and 64, the air permeability before and after the center plate 62 can be secured by the through hole 63. Thereby, the stuffiness of the back of the seated person can be suppressed and the comfort at the time of sitting can be secured.
  • the wire 71 presses the center plate 62.
  • the center plate 62 is further pushed by the wire 71 and deformed.
  • the rigidity of the center plate 62 on both the left and right sides of the through holes 63, 64, 65 is lowered.
  • the ribs 66 are provided on both the left and right sides of the through hole 64, the ribs 66 can ensure the rigidity of the central plate 62 on the left and right sides of the through hole 64.
  • the flange 82 of the duct 81 is attached to the periphery of the through hole 65, the flange 82 can ensure the rigidity of the central plate 62 on both the left and right sides of the through hole 65.
  • the central plates 62 on the left and right sides of the through-hole 63 are low-rigidity portions 62a (see FIG. 8) that have lower bending rigidity in the front-rear direction than the portion that continues upward.
  • the central plate 62 can be easily bent and deformed starting from the low-rigidity portion 62a (through hole 63).
  • By changing the position and size of the through-hole 63 it is possible to specify how the center plate 62 is deformed. As a result, the degree of freedom of deformation of the center plate 62 can be improved.
  • the central plate 62 When the through holes 63, 64, 65 and the side slits 15 are continuous, the central plate 62 is easily twisted above and below the through holes 63, 64, 65. Therefore, the central plate 62 may be bent starting from the through holes 63, 64, 65. In the present embodiment, since the through holes 63, 64, 65 and the side slits 15 are not continuous, the central plate 62 is prevented from being twisted above and below the through holes 63, 64, 65. Bending can be suppressed. As a result, the durability of the center plate 62 can be ensured.
  • the shapes of the vehicle seat 1, the frames 10, 40, 60, the back pad 30, and the like are examples, and it is natural to adopt various shapes.
  • the moving units 22, 52, 72 have been described with respect to the frames 10, 40, 60 provided on the right side frame 11, but the present invention is not necessarily limited thereto. It is naturally possible to invert the left and right of the frames 10, 40, 60.
  • peripheral plates 18 and 44 are provided between the pair of side slits 15 and the side frames 11 and 12 , but the present invention is not necessarily limited thereto.
  • the present invention is not necessarily limited thereto.
  • each part of the extrusion mechanisms 20, 50, 70 is mainly made of steel has been described, but the present invention is not necessarily limited thereto. Of course, it is possible to use metals and synthetic resins other than steel for the extrusion mechanisms 20, 50, and 70.
  • the back pad 30 is made of foamed synthetic resin such as flexible polyurethane foam.
  • the present invention is not limited to this.
  • the material of the back pad 30 can be changed as appropriate.
  • materials other than the foamed synthetic resin include, for example, those obtained by curing (bonding) fibers made of synthetic resin with a binder such as urethane, and those obtained by melting synthetic resin fibers by heat and welding them together. Can be mentioned.
  • the recess 42 is formed so as to connect the upper ends of the side slits 15 in the left-right direction.
  • the present invention is not necessarily limited thereto.
  • a plurality of recesses 42 can be provided. Since the portion continuing below the recess 42 is the low-rigidity portion 45, the manner of deformation of the central plate 43 can be specified by appropriately setting the position and number of the recesses 42 (low-rigidity portions 45). As a result, the degree of freedom of deformation of the central plate 43 can be improved.
  • the moving unit 72 moves the wire 71 in the vertical direction.
  • the present invention is not necessarily limited to this. It is naturally possible to move the wire 71 in the front-rear direction by the moving part 72 by arranging the rod 73 of the moving part 72 so as to extend in the front-rear direction.
  • the central plates 62 on the left and right sides of the through hole 63 are the low rigidity portions 45.
  • the case of 62a has been described. However, it is not necessarily limited to this. It is possible to increase the thickness of a part of the central plate, and to make the portion that continues below the thickened portion a low-rigidity portion. It is also possible to reduce the thickness of a part of the central plate and to make the portion where the thickness is reduced to be a low rigidity portion. It is also possible to provide a step on the central plate and to make a portion that continues below the step a low-rigidity portion. It is also possible to provide a notch in the center plate and make the portion provided with the notch a low rigidity portion.
  • the present invention is not necessarily limited thereto. It is naturally possible to provide a pair of left and right ribs on the rear surface of the central plate and push the central plate between the ribs with a wire (contact portion). Thereby, the movement along the center board of a wire (contact part) can be guided with a rib.
  • any or all of the above embodiments can be combined with some or all of the other embodiments.

Abstract

Provided is a seat back frame (10) whereby seating comfort can be enhanced while the number of components of the seat back frame (10) is reduced. A back plate (14) disposed between a pair of left and right side frames (11, 12) is molded integrally with an upper frame (13) and/or the synthetic resin side frames (11, 12) molded integrally with each other. A pair of left and right side slits (15) penetrating through the back plate (14) in the plate thickness direction extend in a vertical direction. A contact part (21c) contacts a rear surface side of the back plate (14) between the pair of side slits (15). A moving part (22) causes the contact part (21c) to move in the vertical direction and/or a front-rear direction.

Description

シートバックフレーム及びシートバックSeat back frame and seat back
　本発明は、シートバックフレーム及びシートバックに関する。特に、本発明は、部品点数を削減しつつ、座り心地を向上できるシートバックフレーム及びシートバックに関する。 The present invention relates to a seat back frame and a seat back. In particular, the present invention relates to a seat back frame and a seat back that can improve sitting comfort while reducing the number of parts.
　自動車等に搭載される車両用シートのシートバックフレームには、着座者の上体の背面を支持体で支持し、着座者への支持体の押出量を変化させることで、着座者の好みに応じて支持体による着座者のサポート性を調整するものが知られている（特許文献１）。特許文献１の支持体は、着座者の腰を支持するサポートプレートと、着座者の背中を支持するばねとを備える。 The seat back frame of a vehicle seat mounted on an automobile, etc., supports the back of the upper body of the seated person with a support, and changes the amount of pushing the support to the seated person, so that the seated person's preference can be changed. A device that adjusts the supportability of a seated person by a support is known (Patent Document 1). The support body of patent document 1 is provided with the support plate which supports a seated person's waist, and the spring which supports a seated person's back.
特開２００６－１６８６５７号公報JP 2006-168657 A
　しかしながら、上記従来の技術では、サポートプレートとばねとの間に隙間があるため、サポートプレートの角が張り出す等により、着座者の背面に部分的に荷重が集中し、着座者が違和感を覚えることがある。また、着座者の背面をサポートプレートとばねとで支持するため、部品点数が増えるという問題点がある。 However, in the above conventional technique, since there is a gap between the support plate and the spring, the load is partially concentrated on the back surface of the seat occupant due to the corner of the support plate protruding, and the seat occupant feels uncomfortable. Sometimes. Further, since the back surface of the seated person is supported by the support plate and the spring, there is a problem that the number of parts increases.
　本発明は上述した問題点を解決するためになされた。本発明は、部品点数を削減しつつ、座り心地を向上できるシートバックフレーム及びシートバックを提供することを目的とする。 The present invention was made to solve the above-mentioned problems. An object of this invention is to provide the seat back frame and seat back which can improve a seating comfort, reducing a number of parts.
　この目的を達成するために本発明のシートバックフレームは、左右に所定間隔を隔てて配置される一対の合成樹脂製のサイドフレームと、前記サイドフレームの上部間を連結して前記サイドフレームと一体成形されたアッパーフレームと、一対の前記サイドフレーム間に配置される、前記アッパーフレーム及び前記サイドフレームの少なくとも一方と一体成形された背面板と、前記背面板を板厚方向に貫通して上下方向に延びる左右一対の側部スリットと、一対の前記側部スリット間で前記背面板の後面側に接触する接触部と、一対の前記側部スリットよりも外側の前記背面板、又は、前記サイドフレームに設けられる、前記接触部を上下方向および前後方向の少なくとも一方に移動させる移動部とを備える。 In order to achieve this object, the seat back frame of the present invention is integrated with the side frame by connecting a pair of synthetic resin side frames arranged at a predetermined interval on the left and right sides and the upper part of the side frame. A molded upper frame, a back plate integrally formed with at least one of the upper frame and the side frame, disposed between the pair of side frames, and vertically extending through the back plate in the plate thickness direction A pair of left and right side slits extending to the side, a contact portion that contacts the rear side of the back plate between the pair of side slits, and the back plate outside the pair of side slits, or the side frame And a moving part that moves the contact part in at least one of the vertical direction and the front-rear direction.
　請求項１記載のシートバックフレームによれば、一対の側部スリット間の合成樹脂製の背面板が、移動部により移動する接触部によって押される。そのため、側部スリット間の背面板を上下方向に亘って滑らかに撓み変形させることができる。これにより、背面板からの荷重が着座者の背面に部分的に集中することを抑制できる。その結果、着座時の違和感を抑制でき、座り心地を向上できる。 According to the seat back frame of the first aspect, the synthetic resin back plate between the pair of side slits is pushed by the contact portion moved by the moving portion. Therefore, the back plate between the side slits can be smoothly bent and deformed in the vertical direction. Thereby, it can suppress that the load from a back surface board concentrates on a seated person's back partly. As a result, the uncomfortable feeling at the time of sitting can be suppressed and the sitting comfort can be improved.
　サイドフレームとアッパーフレームと背面板とが合成樹脂製の一体成形品であるので、複数の部材を組み立てる場合に比べて部品点数を削減できる。これらの結果、部品点数を削減しつつ、座り心地を向上できる。 Since the side frame, the upper frame, and the back plate are integrally molded products made of synthetic resin, the number of parts can be reduced compared to the case of assembling a plurality of members. As a result, the seating comfort can be improved while reducing the number of parts.
　請求項２記載のシートバックフレームによれば、背面板は、接触部が接触する位置よりも下方を板厚方向に貫通して下部スリットが形成される。一対の側部スリットと下部スリットとが連続する。これにより、請求項１の効果に加え、接触部により押される背面板の変形自由度を向上できると共に、背面板を撓み変形させ易くできる。 According to the seat back frame of the second aspect, the rear plate penetrates below the position where the contact portion contacts in the plate thickness direction, and the lower slit is formed. A pair of side slits and a lower slit are continuous. Thus, in addition to the effect of the first aspect, the degree of freedom of deformation of the back plate pushed by the contact portion can be improved, and the back plate can be easily bent and deformed.
　請求項３記載のシートバックフレームによれば、背面板は、一対の側部スリット間において、上方に連続する部位よりも前後方向の曲げ剛性が低い低剛性部を備える。低剛性部を起点にして背面板を撓み変形させ易くできるので、低剛性部の位置により背面板の変形の仕方を特定できる。従って、請求項１または２の効果に加え、一対の側部スリット間の背面板の変形の自由度をより向上できる。 According to the seat back frame of the third aspect, the back plate includes the low-rigidity portion having lower bending rigidity in the front-rear direction than the portion continuous upward between the pair of side slits. Since the back plate can be easily bent and deformed starting from the low-rigidity portion, it is possible to specify how the back plate is deformed by the position of the low-rigidity portion. Therefore, in addition to the effect of the first or second aspect, the degree of freedom of deformation of the back plate between the pair of side slits can be further improved.
　請求項４記載のシートバックフレームによれば、背面板は、一対の側部スリット間を板厚方向に貫通する貫通孔を備える。貫通孔により背面板の曲げ剛性が低下するので、貫通孔を起点にして背面板を撓み変形させ易くできる。貫通孔の位置により背面板の変形の仕方を特定できるので、背面板の変形の自由度をより向上できる。 According to the seat back frame of claim 4, the back plate includes a through hole that penetrates between the pair of side slits in the plate thickness direction. Since the bending rigidity of the back plate is lowered by the through hole, the back plate can be easily bent and deformed from the through hole. Since the way of deformation of the back plate can be specified by the position of the through hole, the degree of freedom of deformation of the back plate can be further improved.
　貫通孔と側部スリットとが連続している場合には、貫通孔の上下で背面板がねじれ易い。そのため、貫通孔を起点にして背面板が折れ曲がる可能性がある。貫通孔と側部スリットとが非連続なので、貫通孔の上下で背面板がねじれることを抑制して、背面板が折れ曲がることを抑制できる。これらの結果、請求項１から３のいずれかの効果に加え、背面板の耐久性を確保しつつ、貫通孔により背面板の変形の自由度をより向上できる。 When the through hole and the side slit are continuous, the back plate is easily twisted above and below the through hole. Therefore, the back plate may be bent starting from the through hole. Since the through hole and the side slit are discontinuous, the back plate can be prevented from being twisted above and below the through hole, and the back plate can be prevented from being bent. As a result, in addition to the effect of any one of claims 1 to 3, the degree of freedom of deformation of the back plate can be further improved by the through-hole while ensuring the durability of the back plate.
　請求項５記載のシートバックによれば、請求項１から４のいずれかに記載のシートバックフレームにバックパッドが支持される。バックパッドのセンター部により着座者の背面の中央が支持される。センター部の左右方向両側に設けられるサイド部がセンター部に対して着座者側へ張り出される。そのため、サイド部により着座者の左右方向への揺れを抑制できる。側部スリットは、正面視においてセンター部およびサイド部の境界と重なる。又は、側部スリットは、正面視においてセンター部およびサイド部の境界よりもセンター部側に位置する。これにより、背面板でサイド部が押されることを抑制できると共に、センター部を背面板で着座者側へ押すことができる。その結果、サイド部の形状変化を抑制しつつ、センター部を介して背面板で着座者を支持できる。よって、請求項１から４のいずれかの効果に加え、サイド部による着座者の揺れ抑制性能の変化を抑制しつつ、背面板による着座者のサポート性を調整できる。 According to the seat back according to claim 5, the back pad is supported by the seat back frame according to any one of claims 1 to 4. The center of the back surface of the seated person is supported by the center portion of the back pad. Side portions provided on both sides in the left-right direction of the center portion project toward the seated person side with respect to the center portion. For this reason, the side portion can suppress the shaking of the seated person in the left-right direction. The side slit overlaps the boundary between the center portion and the side portion in a front view. Or a side part slit is located in the center part side rather than the boundary of a center part and a side part in front view. Thereby, while being able to suppress that a side part is pushed with a backplate, a center part can be pushed to a seated person side with a backplate. As a result, the seated person can be supported by the back plate through the center part while suppressing the shape change of the side part. Therefore, in addition to the effect of any one of Claims 1 to 4, the support performance of the seated person by the back plate can be adjusted while suppressing the change in the swinging performance of the seated person by the side part.
本発明の第１実施の形態における車両用シートの斜視図である。It is a perspective view of the vehicle seat in a 1st embodiment of the present invention. シートバックフレームの斜視図である。It is a perspective view of a seat back frame. シートバックフレームの正面図である。It is a front view of a seat back frame. 図３のＩＶ－ＩＶ線におけるシートバックフレームの切断部端面図である。FIG. 4 is an end view of the cut portion of the seat back frame taken along line IV-IV in FIG. 3. 図１のＶ－Ｖ線におけるシートバックの切断部端面図である。FIG. 5 is a cutaway end view of the seat back taken along line VV in FIG. 1. 第２実施の形態におけるシートバックフレームの正面図である。It is a front view of the seat back frame in a 2nd embodiment. 図６のＶＩＩ－ＶＩＩ線におけるシートバックフレームの切断部端面図である。FIG. 7 is a cutaway end view of the seat back frame taken along line VII-VII in FIG. 6. 第３実施の形態におけるシートバックフレームの正面図である。It is a front view of the seat back frame in a 3rd embodiment. 図８のＩＸ－ＩＸ線におけるシートバックフレームの切断部端面図である。FIG. 9 is a cutaway end view of the seat back frame taken along line IX-IX in FIG. 8. 図８のＸ－Ｘ線におけるシートバックフレームの切断部端面図である。FIG. 9 is an end view of the cut portion of the seat back frame taken along line XX in FIG. 8.
　以下、本発明の好ましい実施の形態について、添付図面を参照して説明する。まず、図１を参照して、本発明の第１実施の形態における車両用シート１について説明する。図１は、本発明の第１実施の形態における車両用シート１の斜視図である。 Hereinafter, preferred embodiments of the present invention will be described with reference to the accompanying drawings. First, a vehicle seat 1 according to a first embodiment of the present invention will be described with reference to FIG. FIG. 1 is a perspective view of a vehicle seat 1 according to the first embodiment of the present invention.
　図１に示すように、車両用シート１は、自動車等に搭載されるシートである。車両用シート１は、シートクッション２と、シートバック３と、ヘッドレスト４とを備える。シートクッション２の後端にシートバック３が配置される。シートバック３の上端にヘッドレスト４が取り付けられる。シートクッション２に着座者が着座すると、シートバック３が着座者の背もたれとなる。また、ヘッドレスト４が着座者の頭部を支える。 As shown in FIG. 1, the vehicle seat 1 is a seat mounted on an automobile or the like. The vehicle seat 1 includes a seat cushion 2, a seat back 3, and a headrest 4. A seat back 3 is disposed at the rear end of the seat cushion 2. A headrest 4 is attached to the upper end of the seat back 3. When a seated person sits on the seat cushion 2, the seat back 3 becomes the back of the seated person. The headrest 4 supports the seated person's head.
　図２及び図３を参照して、シートバック３のフレームであるシートバックフレーム１０（以下「フレーム１０」と称す）について説明する。図２はフレーム１０の斜視図である。図３はフレーム１０の正面図である。なお、図３ではリクライニング装置５の図示が省略される。 The seat back frame 10 (hereinafter referred to as “frame 10”), which is the frame of the seat back 3, will be described with reference to FIGS. FIG. 2 is a perspective view of the frame 10. FIG. 3 is a front view of the frame 10. In addition, illustration of the reclining apparatus 5 is abbreviate | omitted in FIG.
　図２及び図３に示すように、フレーム１０は、一対のサイドフレーム１１，１２と、アッパーフレーム１３と、背面板１４とを備える。一対のサイドフレーム１１，１２は、左右に所定間隔を隔てて配置される部位である。アッパーフレーム１３は、サイドフレーム１１，１２の上部間を連結する部材である。背面板１４は、一対のサイドフレーム１１，１２間に配置される部材である。サイドフレーム１１，１２とアッパーフレーム１３と背面板１４とは、合成樹脂製の一体成形品である。これにより、サイドフレーム１１，１２及びアッパーフレーム１３と背面板１４とを別途設け、それら複数の部材を組み立てる場合に比べて、フレーム１０の部品点数を削減できる。なお、サイドフレーム１１，１２、アッパーフレーム１３及び背面板１４を構成する合成樹脂としては、エンジニアリング樹脂に強化繊維を複合した繊維強化樹脂が好ましい。 2 and 3, the frame 10 includes a pair of side frames 11, 12, an upper frame 13, and a back plate 14. The pair of side frames 11 and 12 are parts arranged at a predetermined interval on the left and right. The upper frame 13 is a member that connects the upper portions of the side frames 11 and 12. The back plate 14 is a member disposed between the pair of side frames 11 and 12. The side frames 11 and 12, the upper frame 13, and the back plate 14 are integrally molded products made of synthetic resin. Thereby, the number of parts of the frame 10 can be reduced as compared with the case where the side frames 11 and 12 and the upper frame 13 and the back plate 14 are separately provided and the plurality of members are assembled. In addition, as a synthetic resin which comprises the side frames 11 and 12, the upper frame 13, and the backplate 14, the fiber reinforced resin which compounded the reinforced fiber in the engineering resin is preferable.
　アッパーフレーム１３には、ヘッドレスト４から下方に突出する左右一対のロッド（図示せず）が挿入される取付孔１３ａが設けられる。サイドフレーム１１，１２には、支持板１３ｂが架け渡される。支持板１３ｂは、アッパーフレーム１３の下方に位置する。支持板１３ｂは、サイドフレーム１１，１２及び背面板１４と一体成形される。支持板１３ｂには、取付孔１３ａに対応する位置に支持孔１３ｃが設けられる。ヘッドレスト４のロッドを取付孔１３ａ及び支持孔１３ｃに挿入することで、フレーム１０にヘッドレスト４を安定して取り付けできる。 The upper frame 13 is provided with a mounting hole 13a into which a pair of left and right rods (not shown) protruding downward from the headrest 4 are inserted. A support plate 13 b is bridged between the side frames 11 and 12. The support plate 13 b is located below the upper frame 13. The support plate 13 b is integrally formed with the side frames 11 and 12 and the back plate 14. The support plate 13b is provided with a support hole 13c at a position corresponding to the mounting hole 13a. The headrest 4 can be stably attached to the frame 10 by inserting the rod of the headrest 4 into the attachment hole 13a and the support hole 13c.
　サイドフレーム１１，１２の下端には、シートクッション２の後端とシートバック３の下端とを連結するリクライニング装置５が取り付けられる。リクライニング装置５は、シートクッション２に対してシートバック３の傾斜角度を調整する装置である。リクライニング装置５は、主に鋼材から構成される。 The reclining device 5 that connects the rear end of the seat cushion 2 and the lower end of the seat back 3 is attached to the lower ends of the side frames 11 and 12. The reclining device 5 is a device that adjusts the inclination angle of the seat back 3 with respect to the seat cushion 2. The reclining device 5 is mainly composed of a steel material.
　背面板１４は、側縁がサイドフレーム１１，１２に連結されると共に、上縁がアッパーフレーム１３に連結されるパネルである。背面板１４は、板厚方向に貫通して左右一対の側部スリット１５及び下部スリット１６が形成される。一対の側部スリット１５は、上下方向に延び、左右に所定間隔を隔てて左右対称に設けられる。下部スリット１６は、一対の側部スリット１５の下端同士を繋ぐ。これにより、側部スリット１５と下部スリット１６とが連続した切れ目となる。 The back plate 14 is a panel whose side edges are connected to the side frames 11 and 12 and whose upper edge is connected to the upper frame 13. The back plate 14 penetrates in the plate thickness direction to form a pair of left and right side slits 15 and a lower slit 16. The pair of side slits 15 extend in the vertical direction, and are provided symmetrically with a predetermined interval on the left and right. The lower slit 16 connects the lower ends of the pair of side slits 15. Thereby, the side slit 15 and the lower slit 16 form a continuous cut.
　背面板１４は、側部スリット１５と、下部スリット１６と、側部スリット１５の上端を結んだ仮想線Ｌ１とで囲まれた部分を中央板１７とする。背面板１４の中央板１７以外の部分を周辺板１８とする。合成樹脂製の中央板１７の上縁が周辺板１８と連続している。しかし、中央板１７の側縁および下縁が周辺板１８と連続していない。そのため、中央板１７へ板厚方向（前後方向）に荷重を入力することで、中央板１７を容易に撓み変形させることができる。 The back plate 14 has a central plate 17 that is surrounded by a side slit 15, a lower slit 16, and an imaginary line L 1 connecting the upper ends of the side slits 15. A portion of the back plate 14 other than the central plate 17 is a peripheral plate 18. The upper edge of the synthetic resin center plate 17 is continuous with the peripheral plate 18. However, the side and lower edges of the central plate 17 are not continuous with the peripheral plate 18. Therefore, the central plate 17 can be easily bent and deformed by inputting a load to the central plate 17 in the thickness direction (front-rear direction).
　側部スリット１５及び下部スリット１６は、幅が５ｍｍ以上、１０ｍｍ以下であることが好ましい。側部スリット１５及び下部スリット１６の幅が５ｍｍよりも小さい場合には、中央板１７と周辺板１８とが互いに干渉するおそれがある。側部スリット１５及び下部スリット１６の幅が１０ｍｍよりも大きい場合には、背面板１４による着座者のサポート性が低下する。 The side slit 15 and the lower slit 16 preferably have a width of 5 mm or more and 10 mm or less. When the width of the side slit 15 and the lower slit 16 is smaller than 5 mm, the central plate 17 and the peripheral plate 18 may interfere with each other. When the width of the side slit 15 and the lower slit 16 is larger than 10 mm, the supportability of the seated person by the back plate 14 is deteriorated.
　側部スリット１５及び下部スリット１６の幅を５ｍｍ以上、１０ｍｍ以下に設定することで、中央板１７と周辺板１８とを互いに干渉し難くできると共に、背面板１４による着座者のサポート性を確保できる。また、側部スリット１５及び下部スリット１６の幅が大きい程、側部スリット１５及び下部スリット１６により背面板１４の前後の通気性を向上できる。その結果、車両用シート１に着座者が着座したときの快適性を向上できる。 By setting the widths of the side slits 15 and the lower slits 16 to 5 mm or more and 10 mm or less, the center plate 17 and the peripheral plate 18 can hardly interfere with each other, and support for the seated person by the back plate 14 can be secured. . Further, the larger the width of the side slit 15 and the lower slit 16, the better the air permeability before and after the back plate 14 by the side slit 15 and the lower slit 16. As a result, the comfort when the seated person is seated on the vehicle seat 1 can be improved.
　側部スリット１５及び下部スリット１６は、背面板１４の成形時に設けられる。なお、背面板１４の成形後に側部スリット１５及び下部スリット１６に相当する部分を除去して、側部スリット１５及び下部スリット１６を設けることも可能である。背面板１４の成形後に側部スリット１５及び下部スリット１６を設ける場合には、中央板１７の形状が周辺板１８の形状に制約される。そのため、中央板１７の形状の自由度が低い。 The side slit 15 and the lower slit 16 are provided when the back plate 14 is molded. It is also possible to provide the side slits 15 and the lower slits 16 by removing portions corresponding to the side slits 15 and the lower slits 16 after forming the back plate 14. When the side slits 15 and the lower slits 16 are provided after the back plate 14 is formed, the shape of the central plate 17 is restricted by the shape of the peripheral plate 18. Therefore, the freedom degree of the shape of the center board 17 is low.
　本実施の形態では背面板１４の成形時において、中央板１７の側縁および下縁と周辺板１８とが連続していない。これにより、周辺板１８の形状に対して中央板１７の形状を大きく異ならせて背面板１４を成形できる。即ち、中央板１７の形状の自由度を高くできる。これにより、中央板１７の下方側を周辺板１８に対して、前方へ向かって凸の円弧状に張り出すように張出部１７ａを形成できる。張出部１７ａにより着座者の腰のサポート性を向上できる。 In the present embodiment, when the back plate 14 is molded, the side and lower edges of the central plate 17 and the peripheral plate 18 are not continuous. As a result, the back plate 14 can be formed with the shape of the central plate 17 being greatly different from the shape of the peripheral plate 18. That is, the degree of freedom of the shape of the center plate 17 can be increased. Thereby, the overhang | projection part 17a can be formed so that the downward side of the center board 17 may protrude in the convex arc shape toward the front with respect to the peripheral board 18. FIG. The support of the seated person's waist can be improved by the overhanging portion 17a.
　フレーム１０は、周辺板１８に対して中央板１７を押し出す押出機構２０を備える。押出機構２０は、ワイヤ２１と、移動部２２とを備える。移動部２２は、サイドフレーム１１に設けられる。 The frame 10 includes an extrusion mechanism 20 that pushes the central plate 17 against the peripheral plate 18. The extrusion mechanism 20 includes a wire 21 and a moving unit 22. The moving unit 22 is provided on the side frame 11.
　ワイヤ２１は、鋼製の丸棒を曲げて形成される部材である。ワイヤ２１は、サイドフレーム１１，１２に架け渡される部材である。ワイヤ２１の第１端２１ａが移動部２２に支持される。ワイヤ２１の第２端２１ｂがサイドフレーム１２に回転可能に支持される。ワイヤ２１は、側部スリット１５を通って中央板１７の後面まで延びる。ワイヤ２１は、中央部分が中央板１７の後面に接触する接触部２１ｃである。接触部２１ｃは、第２端２１ｂに対して偏心して設けられる。接触部２１ｃは、中央板１７（張出部１７ａ）の下縁側に接触する。 The wire 21 is a member formed by bending a steel round bar. The wire 21 is a member that spans the side frames 11 and 12. The first end 21 a of the wire 21 is supported by the moving unit 22. The second end 21 b of the wire 21 is rotatably supported by the side frame 12. The wire 21 extends through the side slit 15 to the rear surface of the central plate 17. The wire 21 is a contact portion 21 c whose center portion contacts the rear surface of the center plate 17. The contact portion 21c is provided eccentric to the second end 21b. The contact portion 21c contacts the lower edge side of the center plate 17 (the overhang portion 17a).
　移動部２２は、プレート２３と、回転軸２４と、回転部２５と、駆動部２６とを備える。プレート２３は、サイドフレーム１１の内側（サイドフレーム１２側）に取り付けられる鋼製の部材である。回転軸２４は、プレート２３とサイドフレーム１１との間に架け渡される鋼製の部材である。回転部２５は、回転軸２４に回転可能に支持される鋼製の部材である。駆動部２６は、回転部２５を駆動させる装置である。駆動部２６は、サイドフレーム１１の外側に設けられる。駆動部２６は、スイッチ（図示せず）を操作することで駆動するモータ（図示せず）によって回転軸２４を中心に回転部２５を回転させる。 The moving unit 22 includes a plate 23, a rotating shaft 24, a rotating unit 25, and a driving unit 26. The plate 23 is a steel member attached to the inside of the side frame 11 (side frame 12 side). The rotating shaft 24 is a steel member that spans between the plate 23 and the side frame 11. The rotating part 25 is a steel member that is rotatably supported by the rotating shaft 24. The driving unit 26 is a device that drives the rotating unit 25. The drive unit 26 is provided outside the side frame 11. The driving unit 26 rotates the rotating unit 25 around the rotating shaft 24 by a motor (not shown) that is driven by operating a switch (not shown).
　プレート２３には回転軸２４を中心とした円弧状の長孔２７が形成される。その長孔２７にワイヤ２１の第１端２１ａが挿入される。長孔２７を貫通したワイヤ２１の第１端２１ａは回転部２５に固定される。回転軸２４の軸心と第２端２１ｂの軸心とが同一の軸心Ｃ１である。そのため、駆動部２６により回転軸２４を中心に回転部２５を回転させることで、ワイヤ２１が第２端２１ｂ及び回転軸２４（軸心Ｃ１）を中心に回転する。 The plate 23 is formed with an arc-shaped long hole 27 centered on the rotating shaft 24. The first end 21 a of the wire 21 is inserted into the long hole 27. The first end 21 a of the wire 21 that passes through the long hole 27 is fixed to the rotating portion 25. The axis of the rotating shaft 24 and the axis of the second end 21b are the same axis C1. Therefore, the drive unit 26 rotates the rotation unit 25 about the rotation shaft 24, whereby the wire 21 rotates about the second end 21b and the rotation shaft 24 (axial center C1).
　従って、駆動部２６を駆動させるスイッチを操作することで、軸心Ｃ１に対して偏心する接触部２１ｃが軸心Ｃ１を中心とした円弧上を移動する。なお、ワイヤ２１の第１端２１ａが長孔２７に挿入されるので、ワイヤ２１の回転（接触部２１ｃの移動）が長孔２７により規制される。図２及び図３では、長孔２７の後端にワイヤ２１の第１端２１ａが位置している。 Therefore, by operating a switch for driving the drive unit 26, the contact portion 21c eccentric with respect to the axis C1 moves on an arc centered on the axis C1. Since the first end 21 a of the wire 21 is inserted into the long hole 27, the rotation of the wire 21 (movement of the contact portion 21 c) is restricted by the long hole 27. 2 and 3, the first end 21 a of the wire 21 is located at the rear end of the long hole 27.
　次に図４を参照してフレーム１０の機能について説明する。図４は図３のＩＶ－ＩＶ線におけるフレーム１０の切断部端面図である。図４は、接触部２１ｃが最も後方側に位置する場合の接触部２１ｃ及び中央板１７が実線で図示される。図４は、接触部２１ｃが最も前方側に位置する場合の接触部２１ｃ及び中央板１７が二点鎖線で図示される。 Next, the function of the frame 10 will be described with reference to FIG. 4 is a cross-sectional end view of the frame 10 taken along the line IV-IV in FIG. In FIG. 4, the contact portion 21 c and the center plate 17 in the case where the contact portion 21 c is located on the rearmost side are illustrated by solid lines. In FIG. 4, the contact portion 21 c and the center plate 17 in the case where the contact portion 21 c is located on the most front side are illustrated by a two-dot chain line.
　図４に示すように、中央板１７の上縁が周辺板１８と連続し、中央板１７の後面に接触部２１ｃが接触する。これにより、フレーム１０を有するシートバック３に着座者がもたれても、中央板１７が後方に撓むことを抑制できる。そのため、中央板１７による着座者の背面のサポート性を確保できる。特に、張出部１７ａによる腰のサポート性を確保できる。 As shown in FIG. 4, the upper edge of the center plate 17 is continuous with the peripheral plate 18, and the contact portion 21 c comes into contact with the rear surface of the center plate 17. Thereby, even if a seated person leans against the seat back 3 having the frame 10, the center plate 17 can be prevented from being bent backward. Therefore, it is possible to ensure the supportability of the back surface of the seated person by the central plate 17. In particular, the supportability of the waist by the overhanging portion 17a can be secured.
　なお、下部スリット１６により中央板１７の下縁が周辺板１８と連続していない。そのため、接触部２１ｃよりも中央板１７の下縁側に着座者がもたれると中央板１７が後方へ撓み易い。本実施の形態では、接触部２１ｃが中央板１７の下縁側に接触する。そのため、フレーム１０を有するシートバック３に着座者がもたれても、中央板１７全体が撓むことを抑制できる。その結果、中央板１７による着座者の背面のサポート性を向上できる。 The lower edge of the central plate 17 is not continuous with the peripheral plate 18 due to the lower slit 16. Therefore, if a seated person leans on the lower edge side of the center plate 17 with respect to the contact portion 21c, the center plate 17 is easily bent backward. In the present embodiment, the contact portion 21 c contacts the lower edge side of the center plate 17. Therefore, even if a seated person leans against the seat back 3 having the frame 10, it is possible to suppress the entire center plate 17 from being bent. As a result, the supportability of the back surface of the seated person by the central plate 17 can be improved.
　接触部２１ｃが図４の実線の位置にある場合、中央板１７は接触部２１ｃに押されていない。駆動部２６（図３参照）により軸心Ｃ１を中心にして矢印Ａ方向に接触部２１ｃを移動させることで、中央板１７が接触部２１ｃに押されて撓み変形する。図４の二点鎖線の位置まで接触部２１ｃが移動することで、中央板１７が実線で示す状態から二点鎖線で示す状態に撓み変形する。二点鎖線で示す状態では、中央板１７が最も着座者側へ押し出されている。 When the contact part 21c is in the position of the solid line in FIG. 4, the center plate 17 is not pushed by the contact part 21c. By moving the contact portion 21c in the direction of arrow A about the axis C1 by the drive portion 26 (see FIG. 3), the center plate 17 is pushed by the contact portion 21c and deformed. When the contact portion 21c moves to the position of the two-dot chain line in FIG. 4, the center plate 17 is bent and deformed from the state indicated by the solid line to the state indicated by the two-dot chain line. In the state shown by the two-dot chain line, the center plate 17 is pushed out to the seated person side most.
　着座者の好みに応じて接触部２１ｃの位置を調整することで、着座者への中央板１７の押出量を調整できる。その結果、中央板１７による着座者の背面のサポート性を着座者の好みに応じて調整できる。特に、本実施の形態では、中央板１７の張出部１７ａが接触部２１ｃに押されるので、張出部１７ａによる腰のサポート性を着座者の好みに応じて調整できる。 By adjusting the position of the contact portion 21c according to the seated person's preference, the amount of extrusion of the central plate 17 to the seated person can be adjusted. As a result, the supportability of the back surface of the seated person by the central plate 17 can be adjusted according to the seated person's preference. In particular, in the present embodiment, since the overhanging portion 17a of the center plate 17 is pushed by the contact portion 21c, the waist support by the overhanging portion 17a can be adjusted according to the preference of the seated person.
　合成樹脂製の中央板１７の上縁が周辺板１８と連続している。側部スリット１５及び下部スリット１６により中央板１７の側縁および下縁が周辺板１８と連続していない。そのため、中央板１７を上下方向に亘って滑らかに撓み変形させることができる。これにより、中央板１７からの荷重が着座者の背面に部分的に集中することを抑制できるので、着座時の違和感を抑制できる。その結果、フレーム１０を有する車両用シート１の座り心地を向上できる。 The upper edge of the synthetic resin center plate 17 is continuous with the peripheral plate 18. The side and lower edges of the central plate 17 are not continuous with the peripheral plate 18 due to the side slits 15 and the lower slits 16. Therefore, the central plate 17 can be smoothly bent and deformed in the vertical direction. Thereby, since it can suppress that the load from the center board 17 concentrates partially on a seated person's back surface, the uncomfortable feeling at the time of seating can be suppressed. As a result, the sitting comfort of the vehicle seat 1 having the frame 10 can be improved.
　特に、下部スリット１６により中央板１７の下縁が周辺板１８と連続していないので、中央板１７の下縁を周辺板１８から大きく離すことができる。即ち、下部スリット１６により中央板１７の変形自由度を向上できると共に、中央板１７を撓み変形させ易くできる。 Particularly, since the lower edge of the central plate 17 is not continuous with the peripheral plate 18 due to the lower slit 16, the lower edge of the central plate 17 can be largely separated from the peripheral plate 18. That is, the lower slit 16 can improve the degree of freedom of deformation of the center plate 17 and can easily deform the center plate 17 by bending.
　次に図５を参照してフレーム１０とバックパッド３０との関係を説明する。図５は図１のＶ－Ｖ線におけるシートバック３の切断部端面図である。図５に示すように、シートバック３は、フレーム１０を覆うようにバックパッド３０がフレーム１０に支持され、バックパッド３０がカバー３１で覆われて形成される。カバー３１は、主にファブリックや合成皮革または皮革等から構成される部材である。 Next, the relationship between the frame 10 and the back pad 30 will be described with reference to FIG. FIG. 5 is a cutaway end view of the seat back 3 taken along the line VV in FIG. As shown in FIG. 5, the seat back 3 is formed such that the back pad 30 is supported by the frame 10 so as to cover the frame 10, and the back pad 30 is covered with a cover 31. The cover 31 is a member mainly composed of fabric, synthetic leather, leather, or the like.
　バックパッド３０は、弾力性のある軟質ポリウレタンフォーム等の発泡合成樹脂製の部材である。バックパッド３０は、主にフレーム１０の着座者側に設けられる。バックパッド３０は、センター部３２と、サイド部３３とを備える。センター部３２は、バックパッド３０の左右方向中央の部位である。サイド部３３は、センター部３２の左右方向両側に設けられる部位である。 The back pad 30 is a foamed synthetic resin member such as flexible polyurethane foam having elasticity. The back pad 30 is mainly provided on the seated person side of the frame 10. The back pad 30 includes a center part 32 and side parts 33. The center portion 32 is a central portion of the back pad 30 in the left-right direction. The side portions 33 are portions provided on both sides of the center portion 32 in the left-right direction.
　センター部３２は、着座者の背面の左右方向中央を支持するクッション材である。サイド部３３は、着座者の左右方向への揺れを抑制するクッション材である。サイド部３３は、センター部３２に対して着座者側へ張り出す。センター部３２とサイド部３３との境界には、フック（図示せず）を介してカバー３１を吊り込むための溝部３４が形成される。 The center portion 32 is a cushion material that supports the center of the back side of the seated person. The side portion 33 is a cushioning material that suppresses shaking of the seated person in the left-right direction. The side part 33 projects to the seated person side with respect to the center part 32. A groove 34 for hanging the cover 31 through a hook (not shown) is formed at the boundary between the center portion 32 and the side portion 33.
　正面視において（中央板１７の前面側から見て）、側部スリット１５と溝部３４（センター部３２とサイド部３３との境界）とが重なる。そのため、中央板１７でサイド部３３が押されることを抑制できると共に、中央板１７でセンター部３２を押すことができる。これにより、サイド部３３の形状変化を抑制しつつ、着座者の好みに応じて調整された中央板１７でセンター部３２を介して着座者を支持できる。その結果、サイド部３３による着座者の揺れ抑制性能の変化を抑制しつつ、中央板１７による着座者のサポート性を調整できる。 When viewed from the front (viewed from the front side of the central plate 17), the side slit 15 and the groove 34 (the boundary between the center portion 32 and the side portion 33) overlap each other. Therefore, it is possible to suppress the side portion 33 from being pushed by the center plate 17 and to push the center portion 32 by the center plate 17. Thereby, a seated person can be supported via the center part 32 with the center board 17 adjusted according to the seated person's preference, suppressing the shape change of the side part 33. FIG. As a result, it is possible to adjust the supportability of the seated person by the central plate 17 while suppressing the change of the seating person's shaking restraining performance by the side portion 33.
　なお、正面視において、側部スリット１５の幅内に溝部３４が含まれる場合や、正面視において、溝部３４よりもセンター部３２側に側部スリット１５が位置する場合には、中央板１７でサイド部３３が押されることをより抑制できる。その結果、サイド部３３による着座者の揺れ抑制性能の変化をより抑制できる。 When the groove portion 34 is included in the width of the side slit 15 in the front view, or when the side slit 15 is located closer to the center portion 32 than the groove portion 34 in the front view, the center plate 17 It can suppress more that the side part 33 is pushed. As a result, it is possible to further suppress a change in seated person's shaking suppression performance by the side portion 33.
　次に図６及び図７を参照して第２実施の形態におけるシートバックフレーム４０（以下「フレーム４０」と称す）について説明する。第１実施の形態では、下部スリット１６により中央板１７の下縁と周辺板１８とが連続していない場合について説明した。これに対し第２実施の形態では、中央板１７の下縁と周辺板１８とが連続している場合について説明する。なお、第１実施の形態と同一の部分については、同一の符号を付して以下の説明を省略する。 Next, a seat back frame 40 (hereinafter referred to as “frame 40”) according to the second embodiment will be described with reference to FIGS. In the first embodiment, the case where the lower edge of the central plate 17 and the peripheral plate 18 are not continuous by the lower slit 16 has been described. In contrast, in the second embodiment, a case where the lower edge of the center plate 17 and the peripheral plate 18 are continuous will be described. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted.
　図６は第２実施の形態におけるフレーム４０の正面図である。図７は図６のＶＩＩ－ＶＩＩ線におけるフレーム４０の切断部端面図である。図７は、接触部５１ｃが最も後方側に位置する場合の接触部５１ｃ及び中央板４３が実線で図示される。図７は、接触部５１ｃが最も前方側に位置する場合の接触部５１ｃ及び中央板４３が二点鎖線で図示される。 FIG. 6 is a front view of the frame 40 in the second embodiment. FIG. 7 is a sectional end view of the frame 40 taken along line VII-VII in FIG. In FIG. 7, the contact portion 51 c and the center plate 43 when the contact portion 51 c is located on the rearmost side are illustrated by solid lines. In FIG. 7, the contact part 51 c and the center plate 43 when the contact part 51 c is located on the most front side are illustrated by a two-dot chain line.
　図６に示すように、フレーム４０の背面板４１は、サイドフレーム１１，１２及びアッパーフレーム１３と一体成形される合成樹脂製のパネルである。背面板４１の側縁がサイドフレーム１１，１２に連結される。背面板４１の上縁がアッパーフレーム１３に連結される。背面板４１は、板厚方向に貫通して左右一対の側部スリット１５が形成される。 As shown in FIG. 6, the back plate 41 of the frame 40 is a synthetic resin panel that is integrally formed with the side frames 11, 12 and the upper frame 13. Side edges of the back plate 41 are connected to the side frames 11 and 12. The upper edge of the back plate 41 is connected to the upper frame 13. The back plate 41 penetrates in the plate thickness direction to form a pair of left and right side slits 15.
　背面板４１は、側部スリット１５の上端を結ぶように前方へ窪む凹部４２が形成される。背面板４１は、側部スリット１５と、凹部４２と、側部スリット１５の下端を結んだ仮想線Ｌ２とで囲まれた部分を中央板４３とする。背面板４１の中央板４３以外の部分を周辺板４４とする。 The back plate 41 has a recess 42 that is recessed forward so as to connect the upper ends of the side slits 15. In the back plate 41, a portion surrounded by the side slit 15, the concave portion 42, and the virtual line L <b> 2 connecting the lower ends of the side slit 15 is defined as a central plate 43. A portion of the back plate 41 other than the central plate 43 is a peripheral plate 44.
　なお、中央板４３及び周辺板４４を上下方向に平面状に伸ばしたとき、中央板４３の上下方向の寸法が周辺板４４の上下方向の寸法よりも大きく設定される。これにより、上縁および下縁が周辺板４４と連続する中央板４３を撓み変形させることができる。 In addition, when the center plate 43 and the peripheral plate 44 are extended in the vertical direction, the vertical dimension of the central plate 43 is set larger than the vertical dimension of the peripheral plate 44. Thereby, the central plate 43 whose upper edge and lower edge are continuous with the peripheral plate 44 can be bent and deformed.
　フレーム４０の押出機構５０は、ワイヤ５１と、移動部５２とを備える。ワイヤ５１は、鋼製の丸棒を曲げて形成される部材である。ワイヤ５１は、サイドフレーム１１，１２に架け渡される。ワイヤ５１の第１端５１ａがサイドフレーム１１を貫通しつつサイドフレーム１１に回転可能に支持される。ワイヤ５１の第２端５１ｂがサイドフレーム１２に回転可能に支持される。ワイヤ５１の第１端５１ａと第２端５１ｂとは軸心Ｃ２が同一なので、第１端５１ａ及び第２端５１ｂの軸心Ｃ２を中心にワイヤ５１を回転させることができる。 The extrusion mechanism 50 of the frame 40 includes a wire 51 and a moving unit 52. The wire 51 is a member formed by bending a steel round bar. The wire 51 is bridged over the side frames 11 and 12. A first end 51 a of the wire 51 is rotatably supported by the side frame 11 while penetrating the side frame 11. The second end 51 b of the wire 51 is rotatably supported by the side frame 12. Since the first end 51a and the second end 51b of the wire 51 have the same axis C2, the wire 51 can be rotated around the axis C2 of the first end 51a and the second end 51b.
　ワイヤ５１は、側部スリット１５を通って中央板４３の後面まで延びる。ワイヤ５１は、中央部分が中央板４３の後面に接触する接触部５１ｃである。接触部５１ｃは、第１端５１ａ及び第２端５１ｂに対して偏心して設けられる。接触部５１ｃは、中央板４３の上下方向中央に接触する。 The wire 51 extends to the rear surface of the central plate 43 through the side slit 15. The wire 51 is a contact portion 51 c whose center portion contacts the rear surface of the center plate 43. The contact portion 51c is provided eccentric to the first end 51a and the second end 51b. The contact portion 51 c contacts the center of the center plate 43 in the vertical direction.
　移動部５２は、主に鋼材から構成され、サイドフレーム１１の外側に設けられる。移動部５２は、回転部５３と、レバー５４と、ロック部（図示せず）とを備える。回転部５３は、サイドフレーム１１を貫通したワイヤ５１の第１端５１ａが固定される部材である。レバー５４は、軸心Ｃ２を中心に回転部５３を手動で回転させる部材である。ロック部は、回転部５３の回転をロックする部材である。なお、回転部５３は、軸心Ｃ２を中心とした回転量が制限されている。 The moving part 52 is mainly made of steel and is provided outside the side frame 11. The moving unit 52 includes a rotating unit 53, a lever 54, and a lock unit (not shown). The rotating portion 53 is a member to which the first end 51 a of the wire 51 that penetrates the side frame 11 is fixed. The lever 54 is a member that manually rotates the rotating portion 53 around the axis C2. The lock portion is a member that locks the rotation of the rotation portion 53. Note that the rotation amount of the rotating unit 53 is limited about the axis C2.
　ロック部によるロックを解除した状態で、着座者がレバー５４を操作することで、回転部５３が軸心Ｃ２を中心に回転する。これにより、回転部５３に固定されるワイヤ５１も軸心Ｃ２を中心に回転する。接触部５１ｃが軸心Ｃ２に対して偏心して設けられるので、レバー５４の操作により軸心Ｃ２を中心とした円弧上を接触部５１ｃが移動する。 When the seated person operates the lever 54 in a state where the lock by the lock unit is released, the rotation unit 53 rotates about the axis C2. Thereby, the wire 51 fixed to the rotation part 53 also rotates centering on the axial center C2. Since the contact portion 51c is provided eccentrically with respect to the axis C2, the contact portion 51c moves on an arc centered on the axis C2 by the operation of the lever 54.
　図７に示すように、中央板４３の上縁および下縁と周辺板４４とが連続しているので、中央板４３を撓み難くできる。そのため、フレーム４０を有するシートバックに着座者がもたれても、中央板４３が後方に撓むことを抑制できる。そのため、中央板４３による着座者の背面のサポート性を確保できる。 As shown in FIG. 7, since the upper and lower edges of the central plate 43 and the peripheral plate 44 are continuous, the central plate 43 can be hardly bent. Therefore, even if a seated person leans against the seat back having the frame 40, the center plate 43 can be prevented from bending backward. Therefore, it is possible to ensure the supportability of the back surface of the seated person by the central plate 43.
　接触部５１ｃが図７の実線の位置にある場合、中央板４３は接触部５１ｃに押されていない。レバー５４（図６参照）により軸心Ｃ２を中心に矢印Ｂ方向へ接触部５１ｃを移動させることで、中央板４３が接触部５１ｃに押されて撓み変形する。中央板４３の上縁および下縁と周辺板４４とが連続している。そのため、着座者への中央板４３の押出量は殆ど変化しない。しかし、接触部５１ｃが図７の二点鎖線の位置へ向かう程、中央板４３が押し出される位置が上方（着座者の腰側から背中側）へ移動する。 When the contact part 51c is in the position of the solid line in FIG. 7, the center plate 43 is not pushed by the contact part 51c. By moving the contact portion 51c in the direction of arrow B around the axis C2 by the lever 54 (see FIG. 6), the central plate 43 is pushed by the contact portion 51c and deformed. The upper and lower edges of the central plate 43 and the peripheral plate 44 are continuous. Therefore, the amount of extrusion of the central plate 43 to the seated person hardly changes. However, the position where the central plate 43 is pushed out moves upward (from the waist side to the back side of the seated person) as the contact portion 51c moves to the position of the two-dot chain line in FIG.
　中央板４３の上縁には、着座者側へ向かって窪む凹部４２が形成されるので、凹部４２の下方に連続する部位よりも凹部４２の前後方向の曲げ剛性が高くなる。逆に言えば、凹部４２の下方に連続する部位（凹部４２の下縁）は、凹部４２よりも前後方向の曲げ剛性が低い低剛性部４５である。これにより、低剛性部４５を起点にして中央板４３を撓み変形させ易くできる。その結果、低剛性部４５により中央板４３の変形の自由度を向上できる。 Since the concave portion 42 that is recessed toward the seated person is formed on the upper edge of the central plate 43, the bending rigidity in the front-rear direction of the concave portion 42 is higher than that of the portion that continues below the concave portion 42. In other words, a portion (lower edge of the recess 42) continuous below the recess 42 is a low-rigidity portion 45 having lower bending rigidity in the front-rear direction than the recess 42. Thereby, the central plate 43 can be easily bent and deformed with the low-rigidity portion 45 as a starting point. As a result, the degree of freedom of deformation of the central plate 43 can be improved by the low rigidity portion 45.
　第１実施の形態における接触部２１ｃの回転中心である軸心Ｃ１に対して（図４参照）、本実施の形態における接触部５１ｃの回転中心である軸心Ｃ２が上方に位置する。第１実施の形態における中央板１７では主に着座者の腰を支持する。一方、本実施の形態における中央板４３では主に着座者の背中を支持する。接触部２１ｃ，５１ｃの位置や、軸心Ｃ１，Ｃ２の位置を調整することで、中央板１７，４３による着座者のサポート性を変更できる。 The axis C2 that is the rotation center of the contact portion 51c in the present embodiment is located above the axis C1 that is the rotation center of the contact portion 21c in the first embodiment (see FIG. 4). The central plate 17 in the first embodiment mainly supports the seated person's waist. On the other hand, the center plate 43 in the present embodiment mainly supports the back of the seated person. By adjusting the positions of the contact portions 21c and 51c and the positions of the axial centers C1 and C2, the supportability of the seated person by the central plates 17 and 43 can be changed.
　次に図８から図１０を参照して第３実施の形態におけるシートバックフレーム６０（以下「フレーム６０」と称す）について説明する。第１，２実施の形態では、中央板１７，４３を板厚方向に貫通する貫通孔がない場合について説明した。これに対し第３実施の形態では、中央板６２を板厚方向に貫通する貫通孔６３，６４，６５がある場合について説明する。なお、第１実施の形態と同一の部分については、同一の符号を付して以下の説明を省略する。 Next, a seat back frame 60 (hereinafter referred to as “frame 60”) in the third embodiment will be described with reference to FIGS. In the first and second embodiments, the case where there is no through hole penetrating the central plates 17 and 43 in the plate thickness direction has been described. On the other hand, in the third embodiment, a case will be described in which there are through holes 63, 64, and 65 penetrating the central plate 62 in the thickness direction. In addition, about the part same as 1st Embodiment, the same code | symbol is attached | subjected and the following description is abbreviate | omitted.
　図８は第３実施の形態におけるフレーム６０の正面図であり、図９は図８のＩＸ－ＩＸ線におけるフレーム６０の切断部端面図である。図１０は図８のＸ－Ｘ線におけるフレーム６０の切断部端面図である。図９は、空調装置８０の図示が省略される。図１０では、中央板６２とワイヤ７１との間にリブ６６の分だけ隙間が空くところ、分かり易くするために、中央板６２とワイヤ７１とを接触させて図示している。 FIG. 8 is a front view of the frame 60 in the third embodiment, and FIG. 9 is an end view of the cut portion of the frame 60 taken along the line IX-IX in FIG. FIG. 10 is a sectional end view of the frame 60 taken along the line XX of FIG. In FIG. 9, the air conditioner 80 is not shown. In FIG. 10, there is a gap corresponding to the rib 66 between the central plate 62 and the wire 71, and the central plate 62 and the wire 71 are shown in contact with each other for easy understanding.
　図８に示すように、フレーム６０の背面板６１は、サイドフレーム１１，１２及びアッパーフレーム１３と一体成形される合成樹脂製のパネルである。背面板６１の側縁がサイドフレーム１１，１２に連結される。背面板６１の上縁がアッパーフレーム１３に連結される。背面板６１は、板厚方向に貫通して左右一対の側部スリット１５及び下部スリット１６が形成される。背面板６１は、側部スリット１５と、下部スリット１６と、側部スリット１５の上端を結んだ仮想線Ｌ１とで囲まれた部分を中央板６２とする。背面板６１の中央板６２以外の部分を周辺板１８とする。 As shown in FIG. 8, the back plate 61 of the frame 60 is a synthetic resin panel that is integrally formed with the side frames 11, 12 and the upper frame 13. Side edges of the back plate 61 are connected to the side frames 11 and 12. The upper edge of the back plate 61 is connected to the upper frame 13. The back plate 61 penetrates in the plate thickness direction to form a pair of left and right side slits 15 and a lower slit 16. In the back plate 61, a portion surrounded by the side slit 15, the lower slit 16, and an imaginary line L <b> 1 connecting the upper ends of the side slits 15 is a central plate 62. A portion of the back plate 61 other than the central plate 62 is referred to as a peripheral plate 18.
　中央板６２には、板厚方向に貫通して左右方向に延びる貫通孔６３，６４，６５が設けられる。また、中央板６２には、中央板６２の後面から張り出して上下に延びる左右一対のリブ６６が設けられる。リブ６６は、中央板６２と一体成形される部位である。リブ６６は、貫通孔６４の左右両側に設けられる。 The central plate 62 is provided with through holes 63, 64, 65 extending in the left-right direction through the thickness direction. The center plate 62 is provided with a pair of left and right ribs 66 that project from the rear surface of the center plate 62 and extend vertically. The rib 66 is a part integrally formed with the center plate 62. The ribs 66 are provided on the left and right sides of the through hole 64.
　貫通孔６３，６４，６５は、中央板６２の左右方向中央に設けられる。貫通孔６３，６４，６５は、側部スリット１５と非連続となるように設定される。貫通孔６３，６４は、中央板６２の上下に隔てて２箇所に設けられる。貫通孔６５は、貫通孔６３，６４よりも幅が広く、貫通孔６３，６４間に設けられる。 The through holes 63, 64, 65 are provided at the center in the left-right direction of the center plate 62. The through holes 63, 64, 65 are set so as not to be continuous with the side slits 15. The through- holes 63 and 64 are provided at two locations spaced apart above and below the central plate 62. The through hole 65 is wider than the through holes 63 and 64 and is provided between the through holes 63 and 64.
　フレーム６０の押出機構７０は、ワイヤ７１と、移動部７２とを備える。ワイヤ７１は、鋼製の丸棒である。ワイヤ７１は、サイドフレーム１１，１２間に架け渡される。ワイヤ７１は、中央板６２の後面側（リブ６６）に接触する。 The extrusion mechanism 70 of the frame 60 includes a wire 71 and a moving unit 72. The wire 71 is a steel round bar. The wire 71 is bridged between the side frames 11 and 12. The wire 71 contacts the rear surface side (rib 66) of the central plate 62.
　移動部７２は、サイドフレーム１１，１２にワイヤ７１を移動可能に保持するものである。移動部７２は、ロッド７３と、挿入部７４，７５と、駆動部７６とを備える。ロッド７３は、上下方向に延びる鋼製の丸棒である。ロッド７３は、サイドフレーム１１，１２の内側に配置される。ロッド７３の両端がサイドフレーム１１，１２にストッパ部７７を介して固定される。挿入部７４，７５は、ロッド７３が挿入されてワイヤ７１の両端がそれぞれ固定される鋼製の部材である。挿入部７４，７５は、ロッド７３に沿って上下に移動する。 The moving unit 72 holds the wire 71 movably on the side frames 11 and 12. The moving part 72 includes a rod 73, insertion parts 74 and 75, and a driving part 76. The rod 73 is a steel round bar extending in the vertical direction. The rod 73 is disposed inside the side frames 11 and 12. Both ends of the rod 73 are fixed to the side frames 11 and 12 via stopper portions 77. The insertion portions 74 and 75 are steel members into which the rod 73 is inserted and both ends of the wire 71 are fixed. The insertion portions 74 and 75 move up and down along the rod 73.
　駆動部７６は、サイドフレーム１１に設けられる装置である。駆動部７６は、サイドフレーム１１の一部を取り除いてサイドフレーム１１に嵌め込まれる。駆動部７６は、スイッチ（図示せず）を操作することで駆動するモータ（図示せず）により挿入部７４をロッド７３に沿って上下に移動させる。ストッパ部７７は、ロッド７３に沿った挿入部７４，７５の移動を規制する部材である。 The drive unit 76 is a device provided in the side frame 11. The drive unit 76 is fitted into the side frame 11 by removing a part of the side frame 11. The drive unit 76 moves the insertion unit 74 up and down along the rod 73 by a motor (not shown) that is driven by operating a switch (not shown). The stopper portion 77 is a member that restricts the movement of the insertion portions 74 and 75 along the rod 73.
　図９に示すように、リブ６６が中央板６２の上下方向の一部（ワイヤ７１が移動可能な領域）に設けられるので、その中央板６２の一部が上下方向に撓み難くなる。そのため、リブ６６がワイヤ７１により押されることで、中央板６２の左右方向中央に対してリブ６６側を着座者側へ張り出すように中央板６２を撓ませることができる。このように撓んだ中央板６２により、横揺れに対する着座者の安定性を確保できる。 As shown in FIG. 9, since the rib 66 is provided in a part of the central plate 62 in the vertical direction (a region where the wire 71 can move), a part of the central plate 62 is difficult to bend in the vertical direction. Therefore, when the rib 66 is pushed by the wire 71, the center plate 62 can be bent so that the rib 66 side protrudes toward the seat occupant side with respect to the center in the left-right direction of the center plate 62. The center plate 62 bent in this way can ensure the stability of the seated person against rolling.
　図１０に示すように、背面板６１（周辺板１８）の後面には、空調装置８０が取り付けられる。空調装置８０から貫通孔６５までフレキシブルホースからなるダクト８１が延びる。ダクト８１の先端にはフランジ８２が形成される。貫通孔６５周縁の中央板６２の後面にフランジ８２がボルト（図示せず）等で取り付けられる。空調装置８０は、車両本体の空調機器（図示せず）から送られてきた空気を、ダクト８１及び貫通孔６５を介して背面板６１の後面から前面へ送る。これにより、着座者の背面の蒸れを抑制したり、着座者の背面を暖めたりできるので、着座時の快適性を向上できる。 As shown in FIG. 10, an air conditioner 80 is attached to the rear surface of the back plate 61 (peripheral plate 18). A duct 81 made of a flexible hose extends from the air conditioner 80 to the through hole 65. A flange 82 is formed at the tip of the duct 81. A flange 82 is attached to the rear surface of the central plate 62 at the periphery of the through hole 65 with a bolt (not shown) or the like. The air conditioner 80 sends air sent from an air conditioner (not shown) of the vehicle body from the rear surface of the back plate 61 to the front surface via the duct 81 and the through hole 65. As a result, it is possible to suppress the stuffiness of the back of the seated person and to warm the back of the seated person, so that the comfort at the time of sitting can be improved.
　なお、空調装置８０は、車両本体の空調機器から空気が送られてくるものに限らず、車内の空気を、ダクト８１を介して貫通孔６５から着座者側へ送ることも可能である。これにより、着座者の背面の蒸れを抑制できる。また、ダクト８１のフランジ８２が中央板６２に取り付けられる場合に限らない。フランジ８２を省略して、ダクト８１を中央板６２に固定せず、ダクト８１の先端を貫通孔６５に向けて配置することも可能である。 Note that the air conditioner 80 is not limited to the air sent from the air conditioning device of the vehicle body, and can also send the air inside the vehicle from the through hole 65 to the seated person via the duct 81. Thereby, the stuffiness of the back of the seated person can be suppressed. The flange 82 of the duct 81 is not limited to being attached to the center plate 62. It is also possible to omit the flange 82 and arrange the tip of the duct 81 toward the through hole 65 without fixing the duct 81 to the central plate 62.
　さらに、中央板６２には、貫通孔６３，６４が設けられるので、中央板６２の前後の通気性を貫通孔６３により確保できる。これにより、着座者の背面の蒸れを抑制でき、着座時の快適性を確保できる。 Furthermore, since the center plate 62 is provided with the through holes 63 and 64, the air permeability before and after the center plate 62 can be secured by the through hole 63. Thereby, the stuffiness of the back of the seated person can be suppressed and the comfort at the time of sitting can be secured.
　ワイヤ７１が図１０の実線の位置にある場合、ワイヤ７１が中央板６２を押圧している。移動部７２（図９参照）によりワイヤ７１を矢印Ｄ方向に移動させることで、中央板６２がワイヤ７１に更に押されて撓み変形する。 When the wire 71 is in the position of the solid line in FIG. 10, the wire 71 presses the center plate 62. By moving the wire 71 in the direction of the arrow D by the moving unit 72 (see FIG. 9), the center plate 62 is further pushed by the wire 71 and deformed.
　中央板６２には貫通孔６３，６４，６５が設けられるので、貫通孔６３，６４，６５の左右両側における中央板６２の剛性が低下する。しかし、本実施の形態では、貫通孔６４の左右両側にリブ６６が設けられるので、リブ６６により貫通孔６４の左右両側における中央板６２の剛性を確保できる。貫通孔６５の周縁にダクト８１のフランジ８２が取り付けられるので、フランジ８２により貫通孔６５の左右両側における中央板６２の剛性を確保できる。 Since the through holes 63, 64, 65 are provided in the center plate 62, the rigidity of the center plate 62 on both the left and right sides of the through holes 63, 64, 65 is lowered. However, in the present embodiment, since the ribs 66 are provided on both the left and right sides of the through hole 64, the ribs 66 can ensure the rigidity of the central plate 62 on the left and right sides of the through hole 64. Since the flange 82 of the duct 81 is attached to the periphery of the through hole 65, the flange 82 can ensure the rigidity of the central plate 62 on both the left and right sides of the through hole 65.
　即ち、本実施の形態では、貫通孔６３の左右両側における中央板６２が、上方に連続する部位よりも前後方向の曲げ剛性が低い低剛性部６２ａ（図８参照）である。その結果、低剛性部６２ａ（貫通孔６３）を起点にして中央板６２を撓み変形させ易くできる。貫通孔６３の位置や寸法を変えることで、中央板６２の変形の仕方を特定できる。その結果、中央板６２の変形の自由度を向上できる。 That is, in the present embodiment, the central plates 62 on the left and right sides of the through-hole 63 are low-rigidity portions 62a (see FIG. 8) that have lower bending rigidity in the front-rear direction than the portion that continues upward. As a result, the central plate 62 can be easily bent and deformed starting from the low-rigidity portion 62a (through hole 63). By changing the position and size of the through-hole 63, it is possible to specify how the center plate 62 is deformed. As a result, the degree of freedom of deformation of the center plate 62 can be improved.
　貫通孔６３，６４，６５と側部スリット１５とが連続している場合には、貫通孔６３，６４，６５の上下で中央板６２がねじれ易い。そのため、貫通孔６３，６４，６５を起点にして中央板６２が折れ曲がる可能性がある。本実施の形態では、貫通孔６３，６４，６５と側部スリット１５とが連続していないので、貫通孔６３，６４，６５の上下で中央板６２がねじれることを抑制して中央板６２が折れ曲がることを抑制できる。この結果、中央板６２の耐久性を確保できる。 When the through holes 63, 64, 65 and the side slits 15 are continuous, the central plate 62 is easily twisted above and below the through holes 63, 64, 65. Therefore, the central plate 62 may be bent starting from the through holes 63, 64, 65. In the present embodiment, since the through holes 63, 64, 65 and the side slits 15 are not continuous, the central plate 62 is prevented from being twisted above and below the through holes 63, 64, 65. Bending can be suppressed. As a result, the durability of the center plate 62 can be ensured.
　以上、実施の形態に基づき本発明を説明したが、本発明は上記実施の形態に何ら限定されるものではない。本発明の趣旨を逸脱しない範囲内で種々の改良変形が可能であることは容易に推察できるものである。例えば、車両用シート１、フレーム１０，４０，６０、バックパッド３０等の形状は一例であり、種々の形状を採用することは当然である。 As mentioned above, although this invention was demonstrated based on embodiment, this invention is not limited to the said embodiment at all. It can be easily inferred that various improvements and modifications can be made without departing from the spirit of the present invention. For example, the shapes of the vehicle seat 1, the frames 10, 40, 60, the back pad 30, and the like are examples, and it is natural to adopt various shapes.
　上記各実施の形態では、移動部２２，５２，７２が右側のサイドフレーム１１に設けられるフレーム１０，４０，６０について説明したが、必ずしもこれに限られるものではない。フレーム１０，４０，６０の左右を反転することは当然可能である。 In each of the above-described embodiments, the moving units 22, 52, 72 have been described with respect to the frames 10, 40, 60 provided on the right side frame 11, but the present invention is not necessarily limited thereto. It is naturally possible to invert the left and right of the frames 10, 40, 60.
　上記各実施の形態では、一対の側部スリット１５とサイドフレーム１１，１２との間に周辺板１８，４４が設けられる場合について説明したが、必ずしもこれに限られるものではない。背面板１４，４１，６１の側縁に側部スリット１５を設け、側部スリット１５とサイドフレーム１１，１２との間に周辺板１８，４４を設けないことは当然可能である。 In each of the above embodiments, the case where the peripheral plates 18 and 44 are provided between the pair of side slits 15 and the side frames 11 and 12 has been described, but the present invention is not necessarily limited thereto. Of course, it is possible to provide the side slits 15 at the side edges of the back plates 14, 41, 61 and not to provide the peripheral plates 18, 44 between the side slits 15 and the side frames 11, 12.
　上記各実施の形態では、背面板１４，４１，６１の側縁がサイドフレーム１１，１２に連結され、背面板１４，４１，６１の上縁がアッパーフレーム１３に連結される場合について説明したが、必ずしもこれに限られるものではない。背面板１４，４１，６１の側縁とサイドフレーム１１，１２とを非連結にしたり、背面板１４，４１，６１の上縁とアッパーフレーム１３とを非連結にしたりすることは当然可能である。 In each of the above-described embodiments, the case where the side edges of the back plates 14, 41, 61 are connected to the side frames 11, 12 and the upper edge of the back plates 14, 41, 61 is connected to the upper frame 13 has been described. However, it is not necessarily limited to this. Of course, it is possible to disconnect the side edges of the back plates 14, 41, 61 and the side frames 11, 12, or disconnect the upper edges of the back plates 14, 41, 61 and the upper frame 13. .
　上記各実施の形態では、押出機構２０，５０，７０の各部が主に鋼製である場合について説明したが、必ずしもこれに限られるものではない。鋼材以外の金属や合成樹脂を押出機構２０，５０，７０に用いることは当然可能である。 In each of the above embodiments, the case where each part of the extrusion mechanisms 20, 50, 70 is mainly made of steel has been described, but the present invention is not necessarily limited thereto. Of course, it is possible to use metals and synthetic resins other than steel for the extrusion mechanisms 20, 50, and 70.
　上記第１実施の形態では、バックパッド３０が軟質ポリウレタンフォーム等の発泡合成樹脂製である場合について説明したが、必ずしもこれに限られるものではない。バックパッド３０の材質は適宜変更可能である。発泡合成樹脂以外の他の材質としては、例えば、合成樹脂製等の繊維をウレタン等のバインダで硬化（結合）したもの、合成樹脂製の繊維を熱で溶融して互いに溶着させたもの等が挙げられる。 In the first embodiment, the case where the back pad 30 is made of foamed synthetic resin such as flexible polyurethane foam has been described. However, the present invention is not limited to this. The material of the back pad 30 can be changed as appropriate. Examples of materials other than the foamed synthetic resin include, for example, those obtained by curing (bonding) fibers made of synthetic resin with a binder such as urethane, and those obtained by melting synthetic resin fibers by heat and welding them together. Can be mentioned.
　上記第２実施の形態では、側部スリット１５の上端を結ぶように凹部４２が形成される場合について説明したが、必ずしもこれに限られるものではない。側部スリット１５の上端以外を左右方向に結ぶように凹部４２を形成することは当然可能である。また、凹部４２を複数設けることが可能である。凹部４２の下方に連続する部位が低剛性部４５であるので、凹部４２（低剛性部４５）の位置や数を適宜設定することにより、中央板４３の変形の仕方を特定できる。その結果、中央板４３の変形の自由度を向上できる。 In the second embodiment, the case where the recess 42 is formed so as to connect the upper ends of the side slits 15 has been described, but the present invention is not necessarily limited thereto. Naturally, it is possible to form the recess 42 so as to tie other than the upper end of the side slit 15 in the left-right direction. A plurality of recesses 42 can be provided. Since the portion continuing below the recess 42 is the low-rigidity portion 45, the manner of deformation of the central plate 43 can be specified by appropriately setting the position and number of the recesses 42 (low-rigidity portions 45). As a result, the degree of freedom of deformation of the central plate 43 can be improved.
　上記第３実施の形態では、移動部７２によりワイヤ７１を上下方向に移動させる場合について説明したが、必ずしもこれに限られるものではない。移動部７２のロッド７３を前後方向に延ばして配置することで、移動部７２によりワイヤ７１を前後方向に移動させることは当然可能である。 In the third embodiment, the case where the moving unit 72 moves the wire 71 in the vertical direction has been described. However, the present invention is not necessarily limited to this. It is naturally possible to move the wire 71 in the front-rear direction by the moving part 72 by arranging the rod 73 of the moving part 72 so as to extend in the front-rear direction.
　上記第２実施の形態では、凹部４２の下方に連続する部位が低剛性部４５である場合について説明し、上記第３実施の形態では、貫通孔６３の左右両側における中央板６２が低剛性部６２ａである場合について説明した。しかし、必ずしもこれに限られるものではない。中央板の一部の板厚を厚くして、その板厚を厚くした部分の下方に連続する部位を低剛性部とすることが可能である。中央板の一部の板厚を薄くして、その板厚を薄くした部分を低剛性部とすることも可能である。また、中央板に段差を設けて、その段差の下方に連続する部位を低剛性部とすることも可能である。中央板にノッチを設けて、そのノッチを設けた部分を低剛性部とすることも可能である。 In the second embodiment, the case where the portion continuous below the recess 42 is the low rigidity portion 45 will be described. In the third embodiment, the central plates 62 on the left and right sides of the through hole 63 are the low rigidity portions 45. The case of 62a has been described. However, it is not necessarily limited to this. It is possible to increase the thickness of a part of the central plate, and to make the portion that continues below the thickened portion a low-rigidity portion. It is also possible to reduce the thickness of a part of the central plate and to make the portion where the thickness is reduced to be a low rigidity portion. It is also possible to provide a step on the central plate and to make a portion that continues below the step a low-rigidity portion. It is also possible to provide a notch in the center plate and make the portion provided with the notch a low rigidity portion.
　上記第３実施の形態では、中央板６２の後面に設けられるリブ６６をワイヤ７１で押す場合について説明したが、必ずしもこれに限られるものではない。中央板の後面に左右一対のリブを設け、リブ間の中央板をワイヤ（接触部）で押すように構成することは当然可能である。これにより、ワイヤ（接触部）の中央板に沿った移動をリブで案内できる。 In the third embodiment, the case where the rib 66 provided on the rear surface of the center plate 62 is pushed by the wire 71 has been described, but the present invention is not necessarily limited thereto. It is naturally possible to provide a pair of left and right ribs on the rear surface of the central plate and push the central plate between the ribs with a wire (contact portion). Thereby, the movement along the center board of a wire (contact part) can be guided with a rib.
　また、上記各実施の形態のいずれかの一部または全部を、他の実施の形態の一部または全部と組み合わせることは可能である。また、上記各実施の形態のうちの一部の構成を省略することも可能である。例えば、第１実施の形態における押出機構２０と、第２実施の形態における押出機構５０と、第３実施の形態における押出機構７０とをそれぞれ交換することは当然可能である。また、第２実施の形態における中央板４３に設けられる凹部４２を第１，３実施の形態における中央板１７，６２に凹部４２を設けることは当然可能である。また、第２実施の形態における凹部４２を省略することも可能である。 In addition, any or all of the above embodiments can be combined with some or all of the other embodiments. Moreover, it is also possible to abbreviate | omit some structures in said each embodiment. For example, it is naturally possible to exchange the extrusion mechanism 20 in the first embodiment, the extrusion mechanism 50 in the second embodiment, and the extrusion mechanism 70 in the third embodiment. In addition, it is naturally possible to provide the recess 42 provided in the center plate 43 in the second embodiment and the recess 42 in the center plates 17 and 62 in the first and third embodiments. It is also possible to omit the recess 42 in the second embodiment.
　１０，４０，６０　シートバックフレーム
　３　　シートバック
　１１，１２　サイドフレーム
　１３　アッパーフレーム
　１４，４１，６１　背面板
　１５　側部スリット
　１６　下部スリット
　２１ｃ，５１ｃ　接触部
　２２，５２，７２　移動部
　３０　バックパッド
　３２　センター部
　３３　サイド部
　４５，６２ａ　低剛性部
　６３，６４，６５　貫通孔
　７１　ワイヤ（接触部） 10, 40, 60 Seat back frame 3 Seat back 11, 12 Side frame 13 Upper frame 14, 41, 61 Back plate 15 Side slit 16 Lower slit 21c, 51c Contact portion 22, 52, 72 Moving portion 30 Back pad 32 Center Part 33 Side part 45, 62a Low rigidity part 63, 64, 65 Through-hole 71 Wire (contact part)

Claims (5)

  1. 　左右に所定間隔を隔てて配置される一対の合成樹脂製のサイドフレームと、
    　前記サイドフレームの上部間を連結して前記サイドフレームと一体成形されたアッパーフレームと、
    　一対の前記サイドフレーム間に配置される、前記アッパーフレーム及び前記サイドフレームの少なくとも一方と一体成形された背面板と、
    　前記背面板を板厚方向に貫通して上下方向に延びる左右一対の側部スリットと、
    　一対の前記側部スリット間で前記背面板の後面側に接触する接触部と、
    　一対の前記側部スリットよりも外側の前記背面板、又は、前記サイドフレームに設けられる、前記接触部を上下方向および前後方向の少なくとも一方に移動させる移動部とを備えるシートバックフレーム。     A pair of synthetic resin side frames arranged at predetermined intervals on the left and right;
    An upper frame integrally formed with the side frame by connecting the upper portions of the side frames;
    A back plate integrally formed with at least one of the upper frame and the side frame, disposed between a pair of the side frames;
    A pair of left and right side slits extending in the vertical direction through the back plate in the thickness direction;
    A contact portion that contacts a rear surface side of the back plate between the pair of side slits;
    A seat back frame comprising: a moving portion that is provided on the back plate outside the pair of side slits or on the side frame and moves the contact portion in at least one of a vertical direction and a front-rear direction.
  2. 　前記背面板は、前記接触部が接触する位置よりも下方を板厚方向に貫通して下部スリットが形成され、
    　前記下部スリットは、一対の前記側部スリットと連続する請求項１記載のシートバックフレーム。     The back plate has a lower slit formed in the plate thickness direction below the position where the contact portion contacts,
    The seat back frame according to claim 1, wherein the lower slit is continuous with the pair of side slits.
  3. 　前記背面板は、一対の前記側部スリット間において、上方に連続する部位よりも前後方向の曲げ剛性が低い低剛性部を備える請求項１又は２に記載のシートバックフレーム。 The seat back frame according to claim 1 or 2, wherein the back plate includes a low-rigidity portion having a lower bending rigidity in the front-rear direction than a portion continuous upward between the pair of side slits.
  4. 　前記背面板は、一対の前記側部スリット間を板厚方向に貫通する、前記側部スリットと非連続の貫通孔を備える請求項１から３のいずれかに記載のシートバックフレーム。 The seat back frame according to any one of claims 1 to 3, wherein the back plate includes a through hole that is discontinuous with the side slits, and penetrates between the pair of side slits in the thickness direction.
  5. 　請求項１から４のいずれかに記載のシートバックフレームと、
    　前記シートバックフレームに支持されるバックパッドとを備え、
    　前記バックパッドは、センター部と、
    　前記センター部の左右方向両側に設けられる、前記センター部に対して着座者側へ張り出すサイド部とを備え、
    　前記側部スリットは、正面視において前記センター部および前記サイド部の境界と重なる、又は、前記センター部と前記サイド部との境界よりも前記センター部側に位置するシートバック。     The seat back frame according to any one of claims 1 to 4,
    A back pad supported by the seat back frame,
    The back pad includes a center portion,
    Provided on both sides of the center portion in the left-right direction, and a side portion projecting toward the seated side with respect to the center portion,
    The side slit is a seat back that overlaps with a boundary between the center portion and the side portion in a front view, or is positioned closer to the center portion than a boundary between the center portion and the side portion.
PCT/JP2017/014206 2016-08-05 2017-04-05 Seat back frame and seat back WO2018025447A1 (en)

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JP2016-154240 2016-08-05
JP2016154240 2016-08-05

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Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS491992U (en) * 1972-04-06 1974-01-09
JPS615814A (en) * 1984-06-20 1986-01-11 アイシン精機株式会社 Resin frame for seatback
US5423593A (en) * 1994-03-10 1995-06-13 Tachi-S, Co., Ltd. Lumbar support device
JPH1057192A (en) * 1996-08-19 1998-03-03 Takano Co Ltd Lumbar support for chair
US6755467B1 (en) * 2000-06-20 2004-06-29 Global Total Office Conformable backrest for a chair
US20120061988A1 (en) * 2010-09-15 2012-03-15 Jaranson John W Ultra-thin seat carrier
EP2548763A1 (en) * 2011-07-19 2013-01-23 Grammer Ag Vehicle seat with backrest deformation
JP2014227120A (en) * 2013-05-24 2014-12-08 日本発條株式会社 Vehicular seat

Patent Citations (8)

* Cited by examiner, † Cited by third party
Publication number Priority date Publication date Assignee Title
JPS491992U (en) * 1972-04-06 1974-01-09
JPS615814A (en) * 1984-06-20 1986-01-11 アイシン精機株式会社 Resin frame for seatback
US5423593A (en) * 1994-03-10 1995-06-13 Tachi-S, Co., Ltd. Lumbar support device
JPH1057192A (en) * 1996-08-19 1998-03-03 Takano Co Ltd Lumbar support for chair
US6755467B1 (en) * 2000-06-20 2004-06-29 Global Total Office Conformable backrest for a chair
US20120061988A1 (en) * 2010-09-15 2012-03-15 Jaranson John W Ultra-thin seat carrier
EP2548763A1 (en) * 2011-07-19 2013-01-23 Grammer Ag Vehicle seat with backrest deformation
JP2014227120A (en) * 2013-05-24 2014-12-08 日本発條株式会社 Vehicular seat

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