JP6924352B2 - The frame structure of the vehicle seat and the vehicle seat using it - Google Patents

Description

The present invention includes a rear frame, a front frame arranged in front of the rear frame, and a pair of left and right side frames connecting both ends of the rear and front frames to support the seat cushion. When, the more the seat back frame for supporting the sheet Tobakku, the frame structure of the vehicle seat, and an improvement of a vehicle seat using the same.

The frame structure of such a vehicle seat is known to be disclosed in Patent Document 1 below.

Utility Model Registration No. 2549114 Gazette

In the conventional frame structure of a vehicle seat, the central portions of the rear and front frames are connected via one central portion frame. In such a case, when the seat back frame receives a forward load from the rear to the lower part, the load acts on the central frame in the axial direction, so that the central frame effectively supports the load by the compressive stress. However, when the seat back frame receives a forward load upward (above the reclining mechanism), a large torsional moment acts from the seat back frame to the rear frame via the reclining mechanism. In order to enhance the torsional rigidity of the rear frame by the central frame of the book, 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 of the present invention is to provide a frame structure of the vehicle seat, which can effectively strengthen the frame structure.

In order to achieve the above object, the present invention includes a rear frame, a front frame arranged 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 seat cushion frame supporting seat cushion, the more the seat back frame for supporting the seat back, the frame structure of the vehicle seat, an intermediate strength member is provided on the rear frame, the middle portion frame to its intermediate strength member with the rear end portion is fixed, this front end portion of the intermediate portion frame is fixed to the front frame, the side wall of the front Symbol intermediate strength member, the buckle connecting the tongue plate of the seat belt is connected Is the first feature. The central frame 14 of the embodiment corresponds to the intermediate frame of the present invention.

The present invention, the intermediate portion frame in addition to the first feature, at a position above the center of the rear frame, a second said Rukoto is fixed to the front surface of the intermediate strength member.

Further, in the present invention, in addition to the first or second feature, the intermediate strength member is provided in the intermediate portion in the left-right direction of the rear frame, and the left and right left and right side walls are each stepped. This is the third feature.

Furthermore, the present invention is, in addition to any of the first to third aspect, the intermediate strength member, a fourth feature that you have made from a pair of left and right members halves coupled to the open end portion to each other And .

Furthermore, in the present invention, in addition to any of the first to fourth features, the rear ends of a pair of intermediate frames arranged one above the other are fixed to the intermediate strength member, and the two intermediate frames are fixed to each other. The front end portions are fixed to the upper and lower sides of the front frame, and the rear end portion of the lower intermediate frame of the pair of intermediate frames arranged vertically is flattened vertically and fixed to the lower surface of the intermediate strength member. The fifth feature is that. The central frames 14 and 15 of the embodiment correspond to the pair of intermediate frames of the present invention.

The present invention, in addition to the fifth feature, the between the two intermediate unit frame, and the sixth aspect of that you have been arranged holder for attaching the other member. The lead wire holder 21 of the embodiment corresponds to the holder of the present invention.

Furthermore, the seventh feature of the present invention is that, in addition to any of the first to sixth features, the intermediate strength member supports the seat back frame.

Furthermore, in addition to any of the first to seventh features, the present invention is characterized in that the seat back frame is attached to the intermediate strength member via a reclining mechanism.

Furthermore, in addition to the eighth feature, the present invention is characterized in that a plurality of the buckle and the reclining mechanism are attached to the intermediate strength member.

Furthermore, in addition to any of the first to ninth features, the seat cushion frame is provided with a slide mechanism for moving the seat cushion back and forth and a slide lever for operating the slide mechanism. The tenth feature is that the slide lever is provided with a knob that protrudes in front of the seat cushion.

Furthermore, the present invention is a vehicle seat using the frame structure of the vehicle seat having any of the features of the first to tenth features, and the cushion member mounted on the frame structure and the surface of the cushion member are provided. The eleventh feature is that it has a covering epidermis.

According to the features of the present invention, an intermediate strength member is provided at an intermediate portion in the left-right direction of the rear frame, the rear end portion of the intermediate portion frame is fixed to the intermediate strength member, and the front end portion of the intermediate portion frame is formed. Since it is fixed to the front frame, the connection strength between the rear frame and the front frame can be strengthened. Then, in the side wall of the intermediate strength member reinforced so the connection strength, a buckle that connects the tongue plate of the seat belt is connected.

The perspective view of the rear seat for automobiles which concerns on embodiment of this invention. The frame system perspective view of the rear seat. A perspective view of the seat cushion frame as viewed from below. FIG. 3 is a sectional view taken along line 4-4 of FIG. A perspective view of a main part of the slide lock device. Perspective view around the release bar of the slide lock device. Perspective view around the rail cover. 8 arrow view (plan view) of FIG. FIG. 8 is a cross-sectional view taken along the line 9-9. 10 arrow view (bottom view) of FIG. Perspective view around the locking claw of the rail cover. FIG. 1 is an enlarged cross-sectional view taken along line 12-12. FIG. 1 is an enlarged cross-sectional view taken along line 13-13. A 12-part enlarged cross-sectional view of FIG. FIG. 14 is an enlarged cross-sectional view taken along line 15-15. 16 arrow view of FIG. Perspective view around the buckle for seat belts. FIG. 15 is a correspondence diagram with FIG. 15, showing another embodiment of the present invention.

Embodiments of the present invention will be described below with reference to the accompanying drawings. In the following description, front and rear, left and right are referred to with reference to the automobile in which the seat of the present invention is installed.

First, in FIGS. 1 and 2, the 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 3a mounted on the seat cushion frame 2, and a seat. It consists of a pair of left and right seat backs 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 has a pipe-shaped rear frame 7 extending in the left-right direction and a pipe-shaped seat having a diameter smaller than that of the rear frame 7 and arranged in parallel with the rear frame 7. The front frame 8 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 are provided. Pivot brackets 10 are welded to the left and right ends of the rear frame 7. Each pivot bracket 10 has a cross-section channel shape (see FIG. 4), and is fitted inside a side frame 9 having a cross-section channel shape. The portion frame 9 is integrally connected to the rear frame 7. Reinforcing collars 9a are bent and formed on the left and right upper edges of the side frame 9. In this way, the rear frame 7 is connected to the highly rigid side frame 9 via the highly rigid pivot bracket 10, and the connection strength between the rear frame 7 and the side frame 9 is strengthened.

A box-shaped intermediate strength member 13 is welded to the central portion of the rear frame 7. The intermediate strength member 13 is composed of a pair of left and right member semifields 13a and 13b that are welded by fitting 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 that 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 above the center of the rear frame 7, and the rear end of the lower central frame 15 is pushed flat up and down. It is crushed and welded to the lower surface of the intermediate strength member 13 located below the center of the rear frame 7.

The front ends of the central frames 14 and 15 are flatly crushed vertically and welded to the upper surface and the lower surface of the front frame 8, respectively.

Reclining brackets 24 that support one end of the reclining mechanism 4 are 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. The 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 side via the pivot shaft 16.

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

Thus, for example, if the own vehicle is hit by a following 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. It acts as a torsional moment on the rear frame 7, but the intermediate strength member 13 is welded to the rear ends of a pair of upper and lower central frames 14 and 15 arranged vertically with the center of the rear frame 7 in between. Since the front ends of the central frames 14 and 15 are welded to the upper and lower surfaces of the front frame 8, one truss structure is formed by the intermediate strength members 13, the central frames 14 and 15, and the front frame 8. The torsional moment will be supported by the compressive stress generated in the upper central frame 14 and the tensile stress generated in the lower central frame 15, so that the rear frame 7 has a strong torsion. It has a rigid rigidity, and the torsional deformation of the rear frame 7 can be effectively suppressed.

When a forward load is applied to the intermediate strength member 13, that is, the central portion of the rear frame 7, the flexural rigidity of the rear frame 7 is strengthened 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, since the rear end portion of the lower central portion frame 15 is flattened vertically and welded to the lower surfaces of one or both of the left and right intermediate strength members 13, a wide welding range is secured to increase the strength of the welded portion. Not only can it be raised, but a sufficient distance between the rear end of the lower central frame 15 and the floor surface of the vehicle body can be secured.

Further, the front ends of the upper and lower central frames 14 and 15 are flattened vertically and welded to the upper and lower surfaces of the front frame 8, so that a wide welding range is secured and the strength of the welded portion is increased. The circumference of the front frame 8 can be made compact, and the space between the front end portion of the lower central frame 15 and the floor surface of the vehicle body can be sufficiently secured.

As shown in FIG. 17, buckles 18 connecting the tongue plates of the seat belts are connected to the side walls of the left and right intermediate strength members 13 by bolts 19, respectively. The left and right buckles 18 are provided with sensors (not shown) for detecting that the tongue plate is connected to them, and the lead wires 20 connected to these sensors are from the outer surfaces of the left and right buckles 18. It is extended.

A lead wire holder 21 arranged between the upper and lower central frame 14 and 15 is fixed to the lower central frame 15 or the upper central frame 14, and the lead wire 20 is attached to the lead wire holder 21. A plurality of clips 22 to be held are attached. After being held by the clip 22, the left and right lead wires 20 are bundled into one, and the connector 23 is connected to the end portion thereof. The connector 23 is connected to another connector (not shown) connected to a display indicating whether or not the tongue plate is connected to the buckle 18.

In this way, 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 arranged between the upper and lower central frames 14, 15. Therefore, the dead space between the central frames 14 and 15 can be effectively used for the installation of 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 are bolted to the lower surfaces of the left and right side frames 9 of the seat cushion frame 2, and these movable rails 25 are attached to the vehicle body. It is slidably supported by a pair of left and right fixed rails 27 that are laid on the floor 26 and extend in the front-rear direction. A known slide lock mechanism 28 capable of selectively locking the rear seat 1 at a plurality of front-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 are provided. The lock mechanism 28 constitutes the slide mechanism S. Furthermore each movable rail 25, together with the release lever 29 for releasing the locked state of the slide lock mechanism 28 is rotatably supported, each release lever 29 to bias it in the lock operation direction of the slide lock mechanism 28 The lock spring 30 is connected.

Also on the left and right of the release lever 29, both ends of the common one of the release bar 31 is connected, the slide lever Le in the release lever 29 and the release bar 31 of the left and right is Ru configured. The release bar 31 is formed by bending one round bar, and is a rod portion that integrally connects a pair of left and right arm portions 31a extending forward from the left and right release levers 29 and the front end portions of these arm portions 31a. It is composed of 31b, and the rod portion 31b is arranged at the lower part of the seat cushion 3 in parallel with the front edge of the seat cushion 3. A knob 33 is continuously provided at the central portion of the rod portion 31b corresponding to the 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 so as to face the front surface of the seat cushion 3, and is bent toward the rod portion 31b from the left and right ends of the grip portion 33a, respectively. It is composed of a pair of left and right support portions 33b extending outward to the left and right, and both of the support portions 33b are welded to the rod portion 31b over a substantially entire length thereof.

Since the grip portion 33a of the knob 33 is in 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, and thus is movable and movable. There is no need to worry about getting your hands dirty by touching the fixed rails 25, 27, etc. According to the pulling up of the knob 33, 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 It can move back and forth. When the knob 33 is released after adjusting the front-rear position of the rear seat 1, the slide lock mechanism 28 operates by the action of the lock spring 30 to lock the rear seat 1 to the adjustment 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 the rigidity of the rod portion 31b is effectively strengthened. It can be accurately transmitted to the left and right slide lock mechanisms 28 at the same time via the release bar 31 to release the locked state. Further, by strengthening 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 portion 34 for receiving the front frame 8 is formed on the lower surface of the seat cushion 3, and the rod portion 31b of the release bar 31 is arranged in the lateral groove portion 34. Will be done. Also on the front end lower surface of the central portion of the seat cushion 3, the grip portion 33a faces notch 35 of the knob 33 (see FIGS. 1 and 1 3) is formed, have continuous to the cutout portion 35, A flute 36 that receives the upper central frame 14 is formed on the lower surface of the seat cushion 3.

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

As shown in FIG. 6, a regulation plate 43 located immediately after the notch 35 is welded to the central portion of the front frame 8, and the regulation plate 43 extends downward to the knob 33. The regulation ring 44 arranged in the grip 33a is welded.

As shown in FIG. 12, an opening 45 corresponding to the notch 35 is provided in the center of the front portion of the extension skin 40, and the grip portion 33a of the knob 33 is exposed forward through the opening 45. .. A decorative piece 46 long enough to traverse the opening 45 is connected to the upper edge of the opening 45, and a short piece 47 shorter than the decorative piece 46 is connected to the intermediate portion of the decorative piece 46. 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, and the second hook 49 is locked to the regulation plate 43, and the third hook 50 is locked to the regulation ring 44. Further, the decorative piece 46 is pulled backward by the short piece 47, then extends downward and passes through the grip portion 33a from upper to lower, and then extends rearward while covering the central portion of the regulation ring 44 and the rod portion 31b. Then, the hook-and-loop fastener 48 is joined to the lower surface of the extension skin 40. In this way, a wide and neat operation space 51 is defined in the notch 35 for the occupant to grip the grip 33a and operate it up and down.

Thus, the grip portion 33a of the knob 33 is exposed to the central portion of the seat cushion 3, that is, the operation space 51 in the notch portion 35 at the intermediate position between the left and right seat portions 3a, and sits on the left and right seat portions 3a. Since it can be visually recognized by any occupant and is as close as possible to any occupant, any occupant immediately grasps the grip portion 33a, accurately pulls up the release bar 31, and slides. The locked state of the lock mechanism 28 can be released, and the operation space 51 of the notch portion 35 is wide, so that the operability of the knob 33 is extremely good.

Moreover, since the release bar 31 is covered with the extension skin 40 together with the support portion 33b of the knob 33, interference between the release bar 31 and other objects stored under the seat cushion 3 is avoided, and the occupant can use the seat cushion. When the hand is turned to the lower surface of No. 3, the hand does not get dirty by touching the cushion portion 31b.

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

Further, the rod portion 31b of the release bar 31 is arranged below the front frame 8 in the lateral groove portion 34 on the lower surface of the cushion member 38 that receives the front frame 8, so that the seat cushion 3 is deformed by the weight of the occupant. It is possible to prevent the release bar 31 from malfunctioning without being affected. Moreover, since the rod portion 31b moves up and down in the lateral groove portion 34 with the vertical operation of the knob 33, it does not interfere with the extension skin 40 covering the open lower surface of the lateral groove portion 34.

Again, in FIG. 6, a cable guide 53 that stands up from the upper surface of the regulation plate 43 and bends rearward in an arc shape is fixed to the regulation plate 43, and the outer cable 54a of the Bowden cable 54 supported by the cable guide 53 is seated. The front end of the inner cable 54b, which extends through the lower part of the cushion 3 to the luggage compartment behind it and is supported by the seat back frame and is guided by the outer cable 54a, extends below the cable guide 53 and extends to the release bar. It is connected to the connection fitting 55 attached to the central portion of 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 towed through the operating member, the release bar 31 is pulled up and the locked state of the slide lock mechanism 28 can be released. In this way, since the release bar 31 can be pulled up on the luggage compartment side as well, the lock state of the slide lock mechanism 28 can be released, the rear seat 1 can be moved forward, and the luggage compartment can be expanded and used. There is convenience.

A pair of protective members 56 for protecting the cable guide 53 are provided on both the left and right sides of the cable guide 53, and these protective members 56 are integrally formed with the regulation plate 43 and welded to the front frame 8.

Next, in FIGS. 7 to 11, synthetic resin rail covers 58 that cover the front ends of the movable and fixed rails 25 and 27 are attached to the left and right side frames 9. For the attachment, the front end of the side frame 9 is provided with a notch 59 that opens forward and a locking hole 60 that is adjacent to the rear of the notch 59. 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 inner and outer surfaces with a gap on the outer surface of the inner cover portion 58a. It is composed of a U-shaped outer cover portion 58b arranged in such a manner and a common bottom portion 58c that integrally connects both cover portions 58a and 58b. Reinforcing ribs 70 are formed.

The inner cover portion 58a includes a ceiling portion 61 that abuts on the upper surface of the front end portion of the side frame 9, a convex portion 62 that rises from the ceiling portion 61 and engages with the notch 59, and a rear portion of the convex portion 62. A locking claw 63 that stands up from the end and engages with the locking hole 60 from below is provided.

Further, fixed arms 64 and 65 projecting upward are integrally formed at the outer and inner rear ends of the U-shaped outer cover portion 58b, and the outer fixed arms 64 are outside the side frame 9. The inner fixing arm 65 is fixed to the side surface with a bolt 66 or a clip, and the inner fixing arm 65 is fixed to the reinforcing collar 9a 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 attaching the rail cover 58, first, in an inclined posture of the rail cover 58 with the rear end facing downward, 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, and the inner cover portion 58a is attached. When the convex portion 62 is engaged with the notch 59 of the side frame 9, and then the rail cover 58 is rotated horizontally with the convex portion 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. By doing so, the front end portion of the rail cover 58 can be fixed to the side frame 9 without using a fixing member such as a bolt.

After that, the outer fixing arm 64 is fixed to the outer surface of the side frame 9 with a bolt 66 or a clip, and the inner fixing arm 65 is fixed to the reinforcing collar 9 a of the side frame 9 of the side frame 9 with a bolt 67 or a clip. When fixed with, the rear end portion of the rail cover 58 can be fixed to the side frame 9, whereby the locking claw 63 can be prevented from coming off from the locking hole 60.

Thus, the rail cover 58, while securely attached to the side portion frames, regardless of the back-and-forth movement of the movable rail 25, it is possible to cover the front end portion of the fixed and movable rails 27, 25. Moreover, it is highly versatile because it can cover the ends of various rails with different structures.

Next, in FIGS. 2, 14 and 15, the following reinforcing structure is adopted for the pipe-shaped support columns 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 column portion 12a with its open surface facing inward. At that time, the support column portion 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 downward from the support column 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 column portion 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 support column portion 12a, and the front side wall thereof is welded so as to be overlapped with the front surface of the side frame 71.

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 side frame 71 and the reinforcing member 72 are formed around the support column portion 12a in the front-rear direction. A reinforcing structure 73 having a rectangular cross section having a long side and having a large section coefficient is configured, whereby the bending rigidity of the support column portion 12a in the front-rear direction is strengthened. It can withstand a large load in the front-rear direction that is received when a following vehicle collides.

In FIGS. 2, 14 and 16, a driven release lever 74 of the reclining mechanism 4 is pivotally supported at the lower end of the side frame 71 on the inner side surface side thereof, and 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 the drive release lever 75 pivotally supported on the front surface side of the lever support plate 76 provided on the upper part of the seat back frame 12 via the inner cable 78a of the Bowden cable 78.

A support plate 79 extends from the lower end of the reinforcing member 72 toward the driven release lever 74, and the lower end of the support plate 79 is an outer support portion that supports the lower end of the outer cable 78b of the Bowden cable 78. 79a is formed. Further, a guide groove 80 for guiding the intermediate portion of the outer cable 78b is formed on the lower end side wall of the reinforcing member 72. In this way, the reinforcing member 72 can not only reinforce the support column portion 12a, but also serve as a support and a guide for the Bowden cable 78.

As shown in FIGS. 2 and 16, the upper portion and the side portion of the lever support plate 76 are welded to the beam portion 12c of the seat back frame 12 and the left and right outer strut portions 12b, respectively. A plurality of wires 81 that connect these to support the cushion member 38 of the seat back 5 are welded to the left and right strut portions 12a and 12b of the seat back frame 12, and the lever support is provided to the uppermost wire 81 thereof. The back surface of the plate 76 is welded. At that time, the uppermost wire 81 is formed with a crank portion 81a that tilts and contacts 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 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 varies, the uppermost wire 81 can be attached to the left and right strut portions 12a. When welding to, 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 strut portions 12a, and is brought into contact with the back surface of the lever support plate 76. By welding both ends of the wire 81 to the left and right strut portions 12a and the crank portion 81a to the back surface of the lever support plate 76 in the abutting state, the lever support plate 76 is welded regardless of the variation in the gap. And the uppermost wire 81 can be welded. In this way, the lever support plate 76 can be welded to the seat back frame 12 and the uppermost wire 81 at three points to increase the support rigidity thereof.

The drive release lever 75 pivotally supported by the lever support plate 76 includes a return spring 82 and a release operation member 83 protruding from the upper end surface of the seat back 5, in addition to the upper end of the inner cable 78a of the Bowden cable 78. Be 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 via the drive release lever 75 and the inner cable 78a, and the reclining mechanism 4 The locked state of the seat back 5 is released, and the seat back 5 can be tilted. Further, 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 other embodiment, the reinforcing member 72'connecting the support column portion 12a and the side frame 71 is formed in an L-shaped cross section . During its front side wall of the reinforcing member 72 'is welded prior embodiment as well as being superposed on the front face of the side frame 71, its rear end is welded to the side surface of the pillar portion 12a.

According to this another embodiment, the reinforcing structure 73 having a large section coefficient is configured, whereby the bending rigidity of the support column portion 12a in the front-rear direction is strengthened, and by using the reinforcing member 72'with 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 thereof. For example, the present invention can be applied to a front seat for one person. Further, the epidermis 39 and the extended epidermis 40 may be made of the same material. Further, the mounting structure of the rail cover 58 can be applied to the case where the fixed and movable rails 27 and 25 are covered with 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 ・ ・ ・ ・ ・ Intermediate strength member
13a, 13b ... Member semi-body
14 ... Middle frame
15 ... Middle frame
18 ... Buckle
21 ... Holder
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 (7, 8) connecting both ends of the rear and front frames (7, 8). In the frame structure of a vehicle seat, which comprises a seat cushion frame (2) provided with 9) and supporting the seat cushion (3) and a seat back frame (12) supporting the seat back (5).
An intermediate strength member (13) is provided on the rear frame (7 ), the rear end portion of the intermediate frame (14) is fixed to the intermediate strength member (13), and the front end of the intermediate frame (14) is fixed. parts is fixed to the front frame (8), on the side wall of the front Symbol intermediate strength member (13), characterized in that the buckle that connects the tongue plate of the seat belt (18) is connected, for a vehicle Seat frame structure. In the frame structure of the vehicle seat according to claim 1,
The frame structure of a vehicle seat, wherein the intermediate frame (14) is fixed to the front surface of the intermediate strength member (13) at a position above the center of the rear frame (7). In the frame structure of the vehicle seat according to claim 1 or 2.
The frame structure of a vehicle seat, wherein the intermediate strength member (13) is provided at an intermediate portion in the left-right direction of the rear frame (7), and both left and right side walls are formed in a stepped manner. In the frame structure of the vehicle seat according to any one of claims 1 to 3.
The frame structure of a vehicle seat, wherein the intermediate strength member (13) is composed of a pair of left and right member semifields (13a, 13b) whose open ends are connected to each other. In the frame structure of the vehicle seat according to any one of claims 1 to 4.
The rear ends of a pair of intermediate frames (14, 15) arranged one above the other are fixed to the intermediate strength member (13), and the front ends of the two intermediate frames (14, 15) are the front frames. Of the pair of intermediate frames (14, 15) that are fixed to the top and bottom of (8) and lined up vertically, the rear end of the lower middle frame (15) is flattened vertically to form an intermediate strength member (8). A frame structure of a vehicle seat, characterized in that it is fixed to the lower surface of 13). In the frame structure of the vehicle seat according to claim 5.
A frame structure of a vehicle seat, characterized in that a holder (21) for attaching another member is arranged between the two intermediate frame (14, 15). In the frame structure of the vehicle seat according to any one of claims 1 to 6.
A frame structure of a vehicle seat, characterized in that the seat back frame (12) is supported by the intermediate strength member (13). In the frame structure of the vehicle seat according to any one of claims 1 to 7.
A frame structure of a vehicle seat, characterized in that the seat back frame (12) is attached to the intermediate strength member (13) via a reclining mechanism (4). In the frame structure of the vehicle seat according to claim 8.
A frame structure of a vehicle seat, characterized in that a plurality of the buckle (18) and the reclining mechanism (4) are attached to the intermediate strength member (13). In the frame structure of the vehicle seat according to any one of claims 1 to 9.
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) has a frame structure for a vehicle seat, characterized in that a knob (33) projecting forward of the seat cushion (3) is provided. A vehicle seat using the frame structure of the vehicle seat according to any one of claims 1 to 10.
A vehicle seat characterized by having a cushion member placed on the frame structure (2, 12) and a skin covering the surface of the cushion member.

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