JP6663557B2 - Vehicle seat frame structure and vehicle seat using the same - Google Patents

Description

The present invention provides a seat cushion frame including a rear frame, a front frame disposed in front of the rear frame, and a pair of left and right side frames connecting both ends of the rear and front frames. And a seat back frame connected to a rear portion of the seat cushion frame and supporting the seat back , and a frame structure of a vehicle seat, and an improvement of a vehicle seat using the same .

  A frame structure of such a vehicle seat is known as disclosed in Patent Document 1 below.

Utility Model Registration No. 2549114

  In a conventional vehicle seat frame structure, the central portions of the rear and front frames are connected via a single central frame. In such a case, when the seat back frame receives a forward load from behind at the bottom, the load acts on the central frame in the axial direction, and the central frame effectively supports the load by compressive stress. However, when the seat back frame receives a forward load upward (above the reclining mechanism), a large torsional moment acts on the rear frame from the seat back frame via the reclining mechanism. In order to increase the torsional rigidity of the rear frame by the central frame, it is necessary to increase the diameter of one central frame sufficiently, which makes it difficult to reduce the weight.

The present invention has been made in view of such circumstances, and an object thereof is to provide a frame structure of the vehicle seat , and a vehicle seat using the same, which can effectively enhance a frame structure . I do.

In order to achieve the above object, the present invention includes a rear frame, a front frame disposed in front of the rear frame, and a pair of left and right side frames connecting between both ends of the rear and front frames. In a vehicle seat frame structure including a seat cushion frame that supports a seat cushion and a seat back frame that is connected to a rear portion of the seat cushion frame and supports a seat back, a center of the rear frame is provided on the rear frame. It is fixed rear end portions of the pair of central frame sandwiched therebetween vertically aligned with Rutotomoni, the front end portions of both the central portion frame is secured to the top and bottom of the front frame, the rear frame, the seat back frame An intermediate strength member for supporting the intermediate strength member is provided. That is secured to a first feature of the.

Further, the present invention provides a seat cushion for supporting a seat cushion including a rear frame, a front frame disposed in front of the rear frame, and a pair of left and right side frames connecting both ends of the rear and front frames. In a vehicle seat frame structure comprising a frame and a seat back frame connected to a rear portion of the seat cushion frame and supporting the seat back, a pair of the rear frames are vertically arranged with the center of the rear frame interposed therebetween. The rear ends of the central frames are fixed, the front ends of the two central frames are fixed above and below the front frame, and a holder for attaching another member is provided between the two central frames. Is a second feature. Note that the lead wire holder 21 of the embodiment corresponds to the holder of the present invention.

Further, the present invention provides a seat cushion for supporting a seat cushion including a rear frame, a front frame disposed in front of the rear frame, and a pair of left and right side frames connecting both ends of the rear and front frames. In a vehicle seat frame structure comprising a frame and a seat back frame connected to a rear portion of the seat cushion frame and supporting the seat back, a pair of the rear frames are vertically arranged with the center of the rear frame interposed therebetween. The rear end of the central frame is fixed, and the front ends of the two central frames are fixed above and below the front frame, and the seat cushion frame has a slide mechanism for moving the seat cushion back and forth. And a slide lever for operating the slide mechanism. The Doreba provided with knobs projecting forward of the seat cushion, the two central frame and the third being disposed within the width of the left and right direction of the knob.

Furthermore, in the present invention, in addition to the second or third feature, the rear frame is provided with an intermediate strength member that supports the seat back frame, and the two central frames are provided with the intermediate strength member. The fourth feature is that the sheet is fixed to the outer periphery.

Further, in the present invention, in addition to the first or fourth feature, a buckle for holding a seat belt is attached to the intermediate strength member, and the attachment position of the buckle is an upper and lower central portion. A fifth feature resides in the presence of frames .

It is found in or invention, first, fourth, in addition to the fifth one of features of the the intermediate strength member, together with the buckle to hold the seat belt is attached, the seat back frame A sixth feature is that the device is attached via a reclining mechanism.

The present invention, in addition to the sixth aspect, the the intermediate strength member, said buckle, said reclining mechanism and seventh feature that each is more attached.

Furthermore, in the present invention, in addition to any one of the first to seventh features, an eighth feature is that the central frame has a flat portion at at least one end.

Further, in the present invention, in addition to any one of the first to eighth features, a ninth feature is that the width between the two central frames increases toward the rear.

Still further, the present invention provides a seat for supporting a seat cushion including a rear frame, a front frame disposed in front of the rear frame, and a pair of left and right side frames connecting both ends of the rear and front frames. A cushion frame, a seat back frame connected to a rear portion of the seat cushion frame to support the seat back, a slide mechanism disposed below the seat cushion to support the seat cushion movably in the front-rear direction, A buckle for holding a seat belt attached to a seat cushion, wherein the rear end of a pair of central frames arranged vertically above and below the center of the rear frame in the rear frame. parts is fixed, the front end portion of both the central portion frame the front Is secured to the top and bottom of the frame, the rear frame, the has intermediate strength member is provided for supporting the seat back frame, the two central frame, first that it is secured to the outer periphery of the intermediate strength member There are ten features.

Further, the eleventh feature of the present invention is a vehicle seat using the vehicle seat frame structure of any of the first to tenth features.

  According to a feature of the present invention, even if a large forward load applied to the upper portion of the seat back acts as a torsional moment on the rear frame, the torsional moment is generated by the compression generated in the upper central frame. Since the rear frame has a strong torsional rigidity by being supported by the stress and the tensile stress generated in the lower central frame, the torsional deformation of the rear frame 7 is effectively performed. Can be suppressed. In addition, when a forward load is applied to the central portion of the rear frame, the bending stress of the rear frame is strengthened by the compressive stress generated in the upper and lower central frames, thereby suppressing the bending deformation of the rear frame. be able to.

1 is a perspective view of an automobile rear seat according to an embodiment of the present invention. FIG. 3 is a perspective view of a frame system of the rear seat. FIG. 3 is a perspective view of the seat cushion frame as viewed from below. FIG. 4 is a sectional view taken along line 4-4 of FIG. 3. FIG. 2 is a perspective view of a main part of the slide lock device. FIG. 3 is a perspective view around a release bar of the slide lock device. The perspective view around a rail cover. FIG. 8 is a view as viewed in the direction of arrow 8 in FIG. 7 (plan view). 9 is a sectional view taken along line 9-9 of FIG. FIG. 10 is a view taken from arrow 10 in FIG. 9 (bottom view). FIG. 3 is a perspective view of the periphery of a locking claw of a rail cover. FIG. 12 is an enlarged sectional view taken along line 12-12 of FIG. 1. FIG. 13 is an enlarged sectional view taken along line 13-13 of FIG. 1. FIG. 3 is an enlarged sectional view of a part 12 in FIG. 2. FIG. 15 is an enlarged sectional view taken along line 15-15 of FIG. 14. FIG. 16 is a view taken in the direction of arrow 16 in FIG. 2. The perspective view around the buckle for seat belts. FIG. 16 is a view showing another embodiment of the present invention and corresponding to FIG. 15.

  An embodiment of the present invention will be described below with reference to the accompanying drawings. In the following description, front and rear, left and right refer to the vehicle on which the seat of the present invention is installed.

  First, in FIGS. 1 and 2, a rear seat 1 as an automobile seat includes a seat cushion frame 2, a seat cushion 3 having a pair of left and right seating portions 3 a mounted on the seat cushion frame 2, and a seat. It comprises a pair of left and right seatbacks 5 connected to the rear end of the cushion frame 2 via a reclining mechanism 4.

  As shown in FIGS. 2 to 4, the seat cushion frame 2 includes a pipe-shaped rear frame 7 extending in the left-right direction, and a pipe-shaped pipe having a smaller diameter than the rear frame 7 and disposed in front of and parallel to the rear frame 7. And a pair of left and right side frames 9 for integrally connecting the left and right ends of the rear and front frames 7 and 8 to each other. Pivot brackets 10 are welded to both left and right ends of the rear frame 7. Each pivot bracket 10 has a channel shape in cross section (see FIG. 4), which is fitted inside the side frame 9 having channel shape in cross section. The part frame 9 is integrally connected to the rear frame 7. Reinforcing flanges 9 a are formed to bend at upper left and right edges of the side frame 9. In this way, the rear frame 7 is connected to the high-rigidity side frame 9 via the high-rigidity pivot bracket 10, and the connection strength between the rear frame 7 and the side frame 9 is enhanced.

  A box-shaped intermediate strength member 13 is welded to the center of the rear frame 7. The intermediate strength member 13 is composed of a pair of left and right member halves 13a and 13b which are welded by fitting their open ends to each other. The rear ends of a pair of upper and lower central frames 14 and 15 are welded to the intermediate strength member 13. At this time, the rear end of the upper central frame 14 is welded to the front surface of the intermediate strength member 13 at a position higher than the center of the rear frame 7, and the rear end of the lower central frame 15 is pressed flat vertically. The crushed flat portion is welded to the lower surface of the intermediate strength member 13 at a position below the center of the rear frame 7.

  The front ends of the central frames 14 and 15 are flat portions squashed up and down flat and welded to the upper and lower surfaces of the front frame 8, respectively.

  Reclining brackets 24 that support one end of the reclining mechanism 4 are respectively bolted to the left and right side walls of the intermediate strength member 13. The other end of each reclining mechanism 4 is supported by a side frame 71 (described later) welded to one side of the seat back frame 12 of each seat back 5. A pivot bracket 32 welded to one side of the seat back frame 12 is connected to the pivot bracket 10 on the seat cushion frame 2 via a pivot shaft 16.

  A plurality of wires 17 arranged in a grid are welded to the seat cushion frame 2, and the bottom plates of the seat cushion 3 are supported by the wires 17.

  Thus, for example, if the own vehicle is hit by a rear vehicle and a large forward load is applied to the upper part of the seat back 5 from the luggage in the rear luggage compartment, the load is applied via the reclining mechanism 4 and the intermediate strength member 13. Acting on the rear frame 7 as a torsional moment, the rear ends of a pair of upper and lower central frames 14 and 15 arranged vertically above and below the center of the rear frame 7 are welded to the intermediate strength member 13. Since the front ends of the center frames 14, 15 are welded to the upper and lower surfaces of the front frame 8, one truss structure is constituted by the intermediate strength member 13, the center frames 14, 15 and the front frame 8, The torsional moment is supported by the compressive stress generated in the upper central frame 14 and the tensile stress generated in the lower central frame 15. Therefore rear frame 7 is made to have a strong torsional rigidity, it is possible to suppress the torsional deformation of the rear frame 7 effectively.

  When a forward load is applied to the intermediate strength member 13, that is, the central portion of the rear frame 7, the bending rigidity of the rear frame 7 is enhanced by the compressive stress generated in the upper and lower central frames 14 and 15. The bending deformation of the rear frame 7 can be suppressed.

  Further, the rear end of the lower central frame 15 is a flat portion which is flattened up and down and is welded to one or both lower surfaces of the left and right intermediate strength members 13, so that a wide welding range is secured. In addition to increasing the strength of the welded portion, it is possible to ensure a sufficient distance between the rear end of the lower central frame 15 and the floor of the vehicle body.

  Also, the front ends of the upper and lower central frames 14 and 15 are flat portions which are respectively flattened up and down and are welded to the upper and lower surfaces of the front frame 8. , The size around the front frame 8 can be reduced, and the space between the front end of the lower central frame 15 and the floor of the vehicle body can be sufficiently ensured.

  As shown in FIG. 17, buckles 18 for connecting tongue plates of a seat belt are connected to side walls of the left and right intermediate strength members 13 by bolts 19 respectively. Each of the left and right buckles 18 is provided with a sensor (not shown) for detecting that a tongue plate is connected to the buckle 18. Is extended.

  A lead wire holder 21 disposed between the upper and lower center frames 14, 15 is fixed to the lower center frame 15 or the upper center frame 14, and the lead wire 20 is attached to the lead wire holder 21. A plurality of clips 22 to be held are mounted. After the left and right lead wires 20 are held by the clip 22, they are bundled together and a connector 23 is connected to an end thereof. The connector 23 is connected to another connector (not shown) connected to a display for displaying whether or not the tongue plate is connected to the buckle 18.

  As described above, the lead wire holder 21 that supports the lead wire 20 via the clip 22 is attached to the lower central frame 15 or the upper central frame 14, and is disposed between the upper and lower central frames 14, 15. Therefore, the dead space between the center frames 14 and 15 can be effectively used for installing the lead wire holder 21.

  Next, in FIGS. 2 and 5, a pair of left and right movable rails 25 extending in the front-rear direction is bolted to the lower surfaces of the left and right side frames 9 of the seat cushion frame 2. It is slidably supported by a pair of left and right fixed rails 27 laid on the floor 26 and extending in the front-rear direction. A known slide lock mechanism 28 that can selectively lock the rear seat 1 at a plurality of front and rear adjustment positions is provided between the movable and fixed rails 25 and 27, and the movable and fixed rails 25 and 27 and the slide lock are provided. The mechanism 28 constitutes the slide mechanism S. A release lever 29 for releasing the lock state of the slide lock mechanism 28 is pivotally supported on each movable rail 25, and each release lever 29 is urged in the lock operation direction of the slide lock mechanism 28. The lock spring 30 is connected.

  Further, both ends of a single release bar 31 are connected to the left and right release levers 29, and the release lever 29 and the release bar 31 constitute a slide lever Le. The release bar 31 is formed by bending a single round bar, and a pair of left and right arms 31a extending forward from the left and right release levers 29, and a rod unit for integrally connecting the front ends of the arms 31a. The rod portion 31b is disposed below the seat cushion 3 and parallel to the front edge of the seat cushion 3. A knob 33 is connected to a central portion of the rod portion 31b corresponding to an intermediate position between the left and right seating portions 3a. The knob 33 has a U-shaped grip portion 33a protruding from the front surface of the central portion of the rod portion 31b toward the front surface of the seat cushion 3, and is bent toward the rod portion 31b from both left and right ends of the grip portion 33a. It comprises a pair of left and right support portions 33b extending outward in the left and right directions, and both support portions 33b are welded to the rod portion 31b over substantially the entire length thereof.

  Since the grip portion 33a of the knob 33 enters the field of view of the occupant sitting on the left and right seating portions 3a, the occupant can immediately grasp the grip portion 33a of the knob 33 and pull it upward. There is no fear of touching the fixed rails 25, 27, etc., and contaminating the hands. When the knob 33 is pulled up, the release bar 31 swings upward together with the release lever 29 to release the locked state of the slide lock mechanism 28, so that the movable rail 25 slides back and forth, that is, the rear seat 1 Back and forth movement is possible. When the knob 33 is released after adjusting the front / rear position of the rear seat 1, the slide lock mechanism 28 is operated by the action of the lock spring 30, and the rear seat 1 is locked at the adjusted position.

  Further, as described above, the left and right support portions 33b of the knob 33 are welded to the rod portion 31b over substantially the entire length thereof, and effectively enhance the rigidity of the rod portion 31b. The lock state can be released by simultaneously and accurately transmitting the right and left slide lock mechanisms 28 via the release bar 31. Further, by increasing the rigidity of the release bar 31, the diameter of the release bar 31 can be reduced, which can contribute to the weight reduction.

  As shown in FIGS. 12 and 13, a lateral groove 34 for receiving the front frame 8 is formed on the lower surface of the seat cushion 3, and the rod 31 b of the release bar 31 is disposed in the lateral groove 34. Is done. A notch 35 (see FIGS. 1 and 13) is formed on the lower surface of the front end of the central portion of the seat cushion 3 so that the grip 33a of the knob 33 faces. A vertical groove 36 for receiving the central frame 14 is formed on the lower surface of the seat cushion 3.

  In a skin 39 covering the surface of the cushion member 38 of the seat cushion 3, an extended skin 40 extending rearward beyond the lateral groove 34 is connected to a lower end of the skin 39 covering the front end surface of the cushion member 38. A first hook 41 attached to the rear end of the seat 40 is locked to the wire 17 of the seat cushion frame 2. Thus, the rod portion 31 b of the release bar 31 in the lateral groove portion 34 is covered with the skin 39.

  As shown in FIG. 6, a regulating plate 43 located immediately after the notch 35 is welded to the central portion of the front frame 8. The regulating ring 44 disposed in the grip 33a is welded.

  As shown in FIG. 12, an opening 45 corresponding to the notch 35 is provided at the center of the front part of the extended skin 40, and the grip 33 a of the knob 33 is exposed forward through the opening 45. . To the upper edge of the opening 45, a decorative piece 46 that is long enough to cross the opening 45 is connected, and to an intermediate portion of the decorative piece 46, a short piece 47 shorter than the decorative piece 46 is connected. A hook-and-loop fastener 48 is attached to the tip of the decorative piece 46, and a second hook 49 is attached to the tip of the short piece 47. A third hook 50 is attached to the lower edge of the opening 45.

  The short piece 47 extends rearward along the ceiling surface of the notch 35 so that the second hook 49 is locked to the restriction plate 43, and the third hook 50 is locked to the restriction ring 44. Further, the makeup piece 46 is pulled backward by the short piece 47, then extends downward, passes through the inside of the grip portion 33a from above to below, and then extends rearward while covering the center of the regulating ring 44 and the rod portion 31b. Then, the hook-and-loop fastener 48 is joined to the lower surface of the extended skin 40. In this manner, a wide and clear operation space 51 for the occupant to grasp and hold the grip portion 33a and perform up and down operations is defined in the cutout portion 35.

  Thus, the grip portion 33a of the knob 33 is exposed to the central space of the seat cushion 3, that is, the operation space 51 in the cutout portion 35 at an intermediate position between the left and right seat portions 3a, and sits on the left and right seat portions 3a. Any occupant can visually recognize the occupant and come as close as possible to any occupant. Therefore, any occupant immediately grasps the grip portion 33a, appropriately performs the lifting operation of the release bar 31, and slides. The lock state of the lock mechanism 28 can be released, and the operation space 51 of the notch 35 is wide.

  In addition, since the release bar 31 is covered with the extended skin 40 together with the support portion 33b of the knob 33, interference between the release bar 31 and other objects stored below the seat cushion 3 is avoided, and the occupant can use the seat cushion. When the hand is turned on the lower surface of 3, the hand does not get dirty by touching the rod portion 31b.

  Further, since the decorative piece 46 covers the central part of the regulating ring 44 and the rod part 31b, it is possible to keep the aesthetic appearance and to prevent the hand of the occupant holding the grip part 33a from touching the central part of the rod part 31b. You can prevent your hands from getting dirty.

  Further, since the rod portion 31b of the release bar 31 is disposed below the front frame 8 in the lateral groove portion 34 on the lower surface of the cushion member 38 for receiving the front frame 8, deformation of the seat cushion 3 due to the weight of the occupant is achieved. The malfunction of the release bar 31 can be prevented without being affected. Moreover, since the rod portion 31b moves up and down in the lateral groove portion 34 in accordance with the vertical operation of the knob 33, it does not interfere with the extended skin 40 covering the open lower surface of the lateral groove portion 34.

  Referring again to FIG. 6, a cable guide 53 that rises from the upper surface and is bent backward in an arc shape is fixed to the regulating plate 43, and the outer cable 54 a of the Bowden cable 54 supported by the cable guide 53 is a sheet. The front end of the inner cable 54b, which extends through the lower part of the cushion 3 to the luggage compartment behind and is supported by the seat back frame and is guided by the outer cable 54a, extends below the cable guide 53 and is connected to the release bar. It is connected to a connection fitting 55 attached to the center of the base 31. An operating member (not shown) facing the luggage compartment is connected to the rear end of the inner cable 54b. When the inner cable 54b is pulled through the operation member, the release bar 31 is pulled up, and the locked state of the slide lock mechanism 28 can be released. As described above, since the release bar 31 can be pulled up even on the luggage compartment side, the locked state of the slide lock mechanism 28 is released, the rear seat 1 is moved forward, and the luggage compartment can be enlarged and used. There is convenience.

  On both left and right sides of the cable guide 53, a pair of protection members 56 for protecting the cable guide 53 are provided. These protection members 56 are formed integrally with the regulating plate 43 and welded to the front frame 8.

  Next, in FIGS. 7 to 11, a rail cover 58 made of synthetic resin is attached to the left and right side frames 9 to cover the front ends of the movable and fixed rails 25 and 27. For the attachment, a notch 59 opening forward and a locking hole 60 adjacent to the rear of the notch 59 are provided at the front end of the side frame 9. On the other hand, the rail cover 58 faces the U-shaped inner cover portion 58a that covers the movable and fixed rails 25 and 27 from the front end surface to both the inner and outer side surfaces with a gap provided between the outer surface of the inner cover portion 58a. And a common bottom 58c integrally connecting the two cover portions 58a and 58b. A plurality of U-shaped outer cover portions 58a and 58b are integrally connected to each other. A reinforcing rib 70 is formed.

  The inner cover portion 58a has a ceiling portion 61 that contacts the upper surface of the front end portion of the side frame 9, a projection portion 62 that protrudes from the ceiling portion 61 and engages with the notch 59, and a rear portion of the projection portion 62. A locking claw 63 is provided which rises upward from the end and engages with the locking hole 60 from below.

  Fixed arms 64, 65 protruding upward are formed integrally with the outer and inner rear ends of the U-shaped outer cover portion 58 b, respectively, and the outer fixed arms 64 are formed outside the side frame 9. The inner fixed arm 65 is fixed to the side surface with a bolt 66 or a clip, and the inner fixed arm 65 is fixed to the reinforcing flange 9 a of the side frame 9 of the side frame 9 with a bolt 67 or a clip. A plurality of reinforcing ribs 68 extending in the vertical direction are formed on the inner surface or the outer surface of each of the fixed arms 64 and 65.

  In mounting the rail cover 58, first, the ceiling portion 61 of the inner cover portion 58a is placed on the upper surface of the front end portion of the side frame 9 with the rail cover 58 inclined downward with the rear end facing downward. When the protrusion 62 is engaged with the notch 59 of the side frame 9 and the rail cover 58 is horizontally rotated about the protrusion 62 as a fulcrum, the locking claw 63 of the rail cover 58 is engaged with the side frame 9. It can be engaged with the stop hole 60. This allows the front end of the rail cover 58 to be fixed to the side frame 9 without using a fixing member such as a bolt.

  Thereafter, the outer fixed arm 64 is fixed to the outer surface of the side frame 9 with a bolt 66 or a clip, and the inner fixed arm 65 is fixed to the reinforcing flange 9a of the side frame 9 of the side frame 9 with a bolt 67 or a clip. If fixed, the rear end of the rail cover 58 can be fixed to the side frame 9, thereby preventing the locking claw 63 from coming off the locking hole 60.

  As described above, the rail cover 58 can cover the front ends of the fixed and movable rails 27 and 25 regardless of the forward and backward movement of the movable rail 25 while being securely attached to the side frame. Moreover, it is possible to cover the end portions of various rails having different structures, and the versatility is high.

  Next, in FIG. 2, FIG. 14 and FIG. 15, the following reinforcing structure is employed for the pipe-shaped support portions 12a on the left and right inner sides of the seat back frame 12. That is, a side frame 71 having a U-shaped cross section is welded to the support 12a with its open surface facing inward. At this time, the support 12a is housed in the side frame 71 and welded to the rear side wall of the side frame 71. The lower end of the side frame 71 extends below the support 12a, and the lower end of the side frame 71 supports the reclining mechanism 4 in cooperation with the reclining bracket 24.

  Further, a reinforcing member 72 is welded to the support 12a and the side frame 71. At that time, the rear side wall of the reinforcing member 72 is welded to the front surface of the column portion 12a, and the front side wall is overlapped with the front surface of the side frame 71 and welded.

  In this way, the seat back frame 12 is supported by the intermediate strength member 13 via the side frame 71 and the reclining mechanism 4, and the front and rear direction of the support member 12a is formed by the side frame 71 and the reinforcing member 72. A reinforcing structure 73 having a rectangular section having a long side and a large section modulus is formed, and thereby the bending rigidity in the front-rear direction of the support portion 12a is strengthened. Therefore, the seat back frame 12, particularly the inner support portion 12a is Therefore, the vehicle can withstand a large front-rear load when a rear-end vehicle is hit.

  2, 14 and 16, the lower end of the side frame 71 is supported on its inner side by a driven release lever 74 of the reclining mechanism 4, and when the driven release lever 74 is swung upward. The locked state of the reclining mechanism 4 is released. The driven release lever 74 is connected to a drive release lever 75 pivotally supported on the front side of a lever support plate 76 provided on the upper portion of the seat back frame 12 via an inner cable 78a of a Bowden cable 78.

  A support plate 79 extends from a lower end of the reinforcing member 72 toward the driven release lever 74. An outer support portion that supports a lower end of the outer cable 78 b of the Bowden cable 78 is provided at a lower end of the support plate 79. 79a are formed. A guide groove 80 for guiding an intermediate portion of the outer cable 78b is formed in a lower end side wall of the reinforcing member 72. As described above, the reinforcing member 72 not only reinforces the column portion 12a but also plays a role of supporting and guiding the Bowden cable 78.

  As shown in FIGS. 2 and 16, the upper part and the side part of the lever support plate 76 are welded to the beam part 12c of the seat back frame 12 and the left and right outer pillar parts 12b, respectively. A plurality of wires 81 for connecting these and supporting the cushion member 38 of the seat back 5 are welded to the left and right support portions 12a and 12b of the seat back frame 12, and the lever support is attached to the uppermost wire 81. The back of the plate 76 is welded. At this time, the uppermost wire 81 is formed with a crank portion 81a that is inclined and abuts on the back surface of the lever support plate 76, and the crank portion 81a is welded to the back surface of the lever support plate 76.

  In this way, even if there is a variation in the gap between the back surface of the lever support plate 76 welded to the seat back frame 12 and the general outer peripheral surface of the uppermost wire 81, the uppermost wire 81 can be connected to the left and right support portions 12a. When welding the wire 81, the crank portion 81a is appropriately rotated together with the uppermost wire 81 in a state where both ends of the wire 81 are in contact with the left and right support portions 12a, and is brought into contact with the back surface of the lever support plate 76. In a contact state, both ends of the wire 81 are welded to the left and right columns 12a, and the crank 81a is welded to the back surface of the lever support plate 76. And the uppermost wire 81 can be welded. In this manner, the lever support plate 76 is welded at three places to the seat back frame 12 and the uppermost wire 81, so that the support rigidity can be increased.

  The drive release lever 75 pivotally supported by the lever support plate 76 includes, in addition to the upper end of the inner cable 78 a of the Bowden cable 78, a return spring 82 and a release operation member 83 protruding from the upper end surface of the seat back 5. Connected.

  When the release operation member 83 is pulled against the urging force of the return spring 82, the driven release lever 74 is swung upward through the drive release lever 75 and the inner cable 78a, and the reclining mechanism 4 Is released, and the seat back 5 can be tilted. When the release operation member 83 is released, the reclining mechanism 4 is locked, and the seat back 5 can be fixed at a desired angle.

  Next, another embodiment of the present invention shown in FIG. 18 will be described.

  In this alternative embodiment, a reinforcing member 72 ′ connecting the support 12 a and the side frame 71 is formed in an L-shaped cross section. At this time, the front side wall of the reinforcing member 72 'is overlapped with the front surface of the side frame 71 and welded, as in the previous embodiment, but the rear end is welded to the side surface of the column 12a.

  According to this alternative embodiment, a reinforcing structure 73 having a large section modulus is formed, thereby strengthening the bending rigidity of the column 12a in the front-rear direction and using the reinforcing member 72 ′ having an L-shaped cross section. The weight can be reduced.

The present invention is not limited to the above embodiment, and various design changes can be made without departing from the gist of the present invention. For example, the present invention can be applied to a front seat for one person. Further, the skin 39 and the extended skin 40 can be made of the same material. Further, the mounting structure of the rail cover 58 can be applied to a case where the rear ends of the fixed and movable rails 27 and 25 are covered by the rail cover.

2 ... seat cushion frame 3 ... seat cushion 4 ... reclining mechanism 5 ... seat back 7 ... rear frame 8 ... ... Front frame 9 ... Side frame 12 ... Seat back frame 13 ... Medium strength members 14, 15 ... Central frame 18 ... Buckle 21 ..... Holders (lead wire holders)
33 Knob Le Slide lever S Slide mechanism

Claims (11)

A rear frame (7), a front frame (8) arranged in front of the rear frame (7), and a pair of left and right side frames (2) connecting both ends of the rear and front frames (7, 8). 9) a seat cushion frame (2) that supports the seat cushion (3) and a seat back frame (12) that is connected to the rear of the seat cushion frame (2) and supports the seat back (5). In the frame structure of the vehicle seat,
Said rear to frame (7), is secured the rear part of the pair of central frame (14, 15) which with respect to the center line up and below the rear part frame (7) Rutotomoni, the two central frames (14, front end 15) is secured to the top and bottom of the front frame (8),
The rear frame (7) is provided with an intermediate strength member (13) for supporting the seat back frame (12), and the central frames (14, 15) are provided with the intermediate strength member (13). A frame structure for a vehicle seat, which is fixed to an outer periphery of the vehicle. A rear frame (7), a front frame (8) arranged in front of the rear frame (7), and a pair of left and right side frames (2) connecting both ends of the rear and front frames (7, 8). 9) a seat cushion frame (2) that supports the seat cushion (3) and a seat back frame (12) that is connected to the rear of the seat cushion frame (2) and supports the seat back (5). In the frame structure of the vehicle seat,
The rear ends of a pair of central frames (14, 15) vertically arranged with the center of the rear frame (7) interposed therebetween are fixed to the rear frame (7). 15) is fixed above and below the front frame (8),
A frame structure for a vehicle seat, characterized in that a holder (21) for attaching another member is arranged between the central frames (14, 15). A rear frame (7), a front frame (8) arranged in front of the rear frame (7), and a pair of left and right side frames (2) connecting both ends of the rear and front frames (7, 8). 9) a seat cushion frame (2) that supports the seat cushion (3) and a seat back frame (12) that is connected to the rear of the seat cushion frame (2) and supports the seat back (5). In the frame structure of the vehicle seat,
The rear ends of a pair of central frames (14, 15) vertically arranged with the center of the rear frame (7) interposed therebetween are fixed to the rear frame (7). 15) is fixed above and below the front frame (8),
The seat cushion frame (2) is provided with a slide mechanism (S) for moving the seat cushion (3) back and forth, and a slide lever (Le) for operating the slide mechanism (S). (Le) is provided with a knob (33) projecting forward of the seat cushion (3), and the central frames (14, 15) are arranged within the width of the knob (33) in the left-right direction. A frame structure for a vehicle seat, characterized in that: The frame structure of a vehicle seat according to claim 2 or 3,
The rear frame (7) is provided with an intermediate strength member (13) for supporting the seat back frame (12), and the central frames (14, 15) are provided with the intermediate strength member (13). A frame structure for a vehicle seat, which is fixed to an outer periphery of the vehicle. The vehicle seat frame structure according to claim 1 or 4 ,
A buckle (18) for holding a seat belt is attached to the intermediate strength member (13), and the buckle (18) is attached to the upper and lower central frames (14, 15). A frame structure for a vehicle seat, which is located between the frames. The frame structure of a vehicle seat according to any one of claims 1, 4 , and 5 ,
A buckle (18) for holding a seat belt is attached to the intermediate strength member (13), and the seat back frame (12) is attached via a reclining mechanism (4). Vehicle seat frame structure. The vehicle seat frame structure according to claim 6 ,
A frame structure for a vehicle seat, wherein a plurality of the buckles (18) and the plurality of reclining mechanisms (4) are attached to the intermediate strength member (13). The vehicle seat frame structure according to any one of claims 1 to 7 ,
The frame structure for a vehicle seat, wherein the central frame (14, 15) has a flat portion at at least one end. The vehicle seat frame structure according to any one of claims 1 to 8 ,
A frame structure for a vehicle seat, characterized in that a width between the center frames (14, 15) increases toward a rear side. A rear frame (7), a front frame (8) arranged in front of the rear frame (7), and a pair of left and right side frames (2) connecting both ends of the rear and front frames (7, 8). 9) a seat cushion frame (2) that supports the seat cushion (3) and a seat back frame (12) that is connected to a rear portion of the seat cushion frame (2) and supports the seat back (5); A slide mechanism (S) that is disposed below the seat cushion (3) and supports the seat cushion (3) so as to be movable in the front-rear direction; A frame structure for a vehicle seat, comprising: a buckle (18);
Rear ends of a pair of central frames (14, 15) vertically arranged with the center of the rear frame (7) interposed therebetween are fixed to the rear frame (7), and the two central frames (14, 15) are fixed. the front end is fixed to and below the front frame (8) of,
The rear frame (7) is provided with an intermediate strength member (13) for supporting the seat back frame (12), and the central frames (14, 15) are provided with the intermediate strength member (13). A frame structure for a vehicle seat, which is fixed to an outer periphery of the vehicle. A vehicle seat using the vehicle seat frame structure according to any one of claims 1 to 10.

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