seat frame

Abstract

The present invention provides a seat frame including: a cushion part for supporting a cushion; a height adjustment part provided below the cushion part for adjusting a height of the cushion part via a plurality of rotating links; a rotation part provided below the height adjustment part for rotating the height adjustment part and the cushion part; and a reinforcing bracket part coupled to the underside of the rotation part to reinforce the rotation part and provided across a pair of rails of a rail part spaced apart from each other and provided below.

Description

[Technical Field]

[0001] The present invention relates to a seat frame. [Background technology]

[0002] It should be apparent that the material described in this section is merely provided as background information for the present invention and may not constitute prior art.

[0003] Generally, a seat used in a vehicle can include a seat frame including a cushion portion that supports the buttocks of a passenger from below, and a seat back that supports the back of the passenger from behind.

[0004] The seat frame of the vehicle seat moves forward and backward or moves up and down on a rail portion, and the seat back can be provided on the seat frame so that its angle can be adjusted so that it can be tilted or raised.

[0005] A vehicle seat needs to be able to simultaneously adjust the height and rotate the seat frame for the convenience of the occupant. However, to date, a seat frame that allows for height adjustment and rotation while also stably meeting load conditions such as a collision has not been developed. [Prior art documents] [Patent documents]

[0006] [Patent Document 1] Korean Patent Publication No. 10-1998-0008730 Summary of the Invention [Problem to be solved by the invention]

[0007] One aspect of the present invention is to provide a seat frame that is adjustable in rotation and height, and can stably meet load conditions such as those in the event of a collision. [Means for solving the problem]

[0008] In one aspect to achieve the above object, the present invention provides a seat frame including: a cushion portion supporting a cushion; a height adjusting portion provided below the cushion portion and adjusting the height of the cushion portion via a plurality of rotary links; a rotating portion provided below the height adjusting portion and rotating the height adjusting portion and the cushion portion; and a reinforcing bracket portion coupled to the underside of the rotating portion to reinforce the rotating portion, the reinforcing bracket portion being provided across a pair of rails of a rail portion spaced apart from each other and provided below.

[0009] The height adjustment unit may include a first link connecting the rotating unit and the cushion unit at the front, and a second link connecting the rotating unit and the cushion unit at the rear.

[0010] The rotating part may include a fixed plate disposed on the lower side, a base plate joined to the upper side of the fixed plate, and a rotating plate rotatably disposed between the fixed plate and the base plate.

[0011] The rotating part may further include a connecting bracket, one side of which is coupled to the upper side of the rotating plate and the other side of which is coupled to the first link and the second link.

[0012] The connecting bracket may have a first connecting reinforcement provided in front of the connecting bracket and forming a closed cross section together with the connecting bracket.

[0013] The connecting bracket may have a second connecting reinforcement provided behind the connecting bracket and forming a closed cross section together with the connecting bracket.

[0014] A seat belt may be fixed to an upper rear side of the connection bracket, and the second connection reinforcement may be coupled to a lower rear side of the connection bracket.

[0015] The rotating unit may further include a motor plate fixed to an upper side of the rotating plate, and a motor member provided on the motor plate and including a drive gear meshing with a big gear fixed to the base plate.

[0016] The reinforcing bracket portion may include a bracket plate that is arranged across the pair of rails and is composed of a single member that is connected to the fixing plate, and a bracket reinforcing member that is composed of a single member that is connected between the fixing plate and the bracket plate and reinforces the bracket plate.

[0017] The bracket reinforcement member may overlap and reinforce the upper side of the bracket plate, and the fixing plate of the rotation part may be coupled to the upper side of the bracket reinforcement member.

[0018] The bracket plate, the bracket reinforcement member, and the fixing plate of the rotating part may have lengths corresponding to each other in a front-rear direction, and may have a longitudinal overlapping section in which they are fixed while overlapping each other in a vertical direction.

[0019] The bracket reinforcement member may be formed to extend in the front-rear direction along the rail, and may have a reinforcement bead protruding upward in front of the bracket reinforcement member.

[0020] The reinforcing bead may be disposed on a plane below the rotating plate. [Effects of the Invention]

[0021] According to one embodiment of the present invention, it is possible to adjust the rotation and height, and it is possible to stably meet load conditions such as a collision. [Brief explanation of the drawings]

[0022] [Figure 1] 1 is a perspective view showing a seat in which a seat frame and a seat back are joined together according to the present invention; [Figure 2a] 10 is a view showing an operating state of the height adjusting unit of the seat frame according to the present invention; [Figure 2b] 10 is a view showing an operating state of the height adjusting unit of the seat frame according to the present invention; [Figure 3] FIG. 2 is an exploded perspective view of a cushion portion and a height adjustment portion of the seat frame of the present invention. [Figure 4a] 10 is a view showing an operating state of a rotating portion of the seat frame according to the present invention; [Figure 4b] 10 is a view showing an operating state of a rotating portion of the seat frame according to the present invention; [Figure 5] FIG. 2 is an exploded perspective view of a rotating portion and a reinforcing bracket portion of the seat frame of the present invention. [Figure 6] FIG. 2 is a perspective view of a reinforcing bracket portion and a rail portion of the seat frame of the present invention. [Figure 7] FIG. 2 is a cross-sectional view of the seat frame of the present invention in the "1" direction. [Figure 8] FIG. 2 is a cross-sectional view of the seat frame of the present invention taken in the direction "2". [Figure 9] FIG. 3 is a cross-sectional view of the seat frame of the present invention taken along the line "3". [Figure 10] FIG. 4 is a cross-sectional view of the seat frame of the present invention taken in the direction of "4". [Figure 11] FIG. 5 is a cross-sectional view of the seat frame of the present invention taken in the direction of "5". [Figure 12] 1A and 1B are a perspective view and a cross-sectional view in the direction of "6" of a portion where a reinforcing bead is formed in a seat frame of the present invention. [Figure 13] 3A and 3B are a perspective view and a plan view of a portion where a reinforcing bead is formed in the seat frame of the present invention. [Figure 14a] 10 shows the results of a deformation analysis of a seat frame according to an embodiment of the present invention. [Figure 14b] 10 shows the results of a deformation analysis of a seat frame according to an embodiment of the present invention. [Figure 15a] 10 shows the deformation analysis results of a seat frame of a comparative example. [Figure 15b] 10 shows the deformation analysis results of a seat frame of a comparative example. [Figure 16] FIG. 7 is a cross-sectional view of the seat frame of the present invention taken in the direction of “7”. DETAILED DESCRIPTION OF THE INVENTION

[0023] Hereinafter, embodiments of the present invention will be described with reference to the accompanying drawings. However, the embodiments of the present invention can be modified into several other forms, and the scope of the present invention is not limited to the embodiments described below. Furthermore, the embodiments of the present invention are provided to more completely explain the present invention to those with average knowledge in the art. Therefore, the shapes and sizes of elements in the drawings may be enlarged or reduced (or highlighted or simplified) for clearer explanation.

[0024] With reference to the drawings, the seat frame of the present invention is shown in the left-right, up-down, and front-to-back directions, and the detailed description of the invention also uses the terms left-right, up-down, and front-to-back, but this is for the convenience of explanation, and the technical features of the seat frame of the present invention are not limited to these directions.

[0025] In the following description, the X axis shown in the accompanying drawings is the front-rear direction of the seat frame, the Y axis is the left-right direction of the seat frame, and the Z axis is the up-down direction of the seat frame.

[0026] Hereinafter, components included in a seat frame 10 according to an embodiment of the present invention will be described in detail with reference to FIGS.

[0027] The seat frame 10 according to an embodiment of the present invention may include a cushion portion 100, a height adjustment portion 200, a rotation portion 300, and a reinforcing bracket portion 400.

[0028] Figure 1 is a perspective view showing a seat in which the seat frame 10 and seat back 20 of the present invention are combined, Figures 2a and 2b are drawings showing the operating state of the height adjustment unit 200 of the seat frame 10 of the present invention, Figure 3 is a perspective view of the cushion unit 100 and height adjustment unit 200 of the seat frame 10 of the present invention in an exploded state, Figures 4a and 4b are drawings showing the operating state of the rotating unit 300 of the seat frame 10 of the present invention, Figure 5 is a perspective view of the rotating unit 300 and reinforcing bracket unit 400 of the seat frame 10 of the present invention in an exploded state, and Figure 6 is a perspective view of the reinforcing bracket unit 400 and rail unit 500 of the seat frame 10 of the present invention.

[0029] The cushion unit 100 may support a cushion. The cushion unit 100 may be provided with a cushion on which a driver sits, and the cushion unit 100 may be rotatably fixed to the seat back 20 of the seat, so that the angle of the seat back 20 may be adjusted.

[0030] The cushion part 100 may include components such as a cushion panel 110, a cushion side frame 120, a cushion side patch 130, a front pipe 140, and a rear pipe 150.

[0031] The front pipe 140 of the cushion part 100 may be provided in front of the cushion part 100 to reinforce the cushion part 100, and the front pipe 140 may be formed to extend in the left-right direction.

[0032] The rear pipe 150 of the cushion part 100 is provided at the rear of the cushion part 100 to reinforce the cushion part 100, and the rear pipe 150 may be formed to extend in the left-right direction and may be provided to penetrate the second link member 221 of the height adjustment part 200 described later.

[0033] The height adjusting unit 200 is provided below the cushion unit 100 and can adjust the height of the cushion unit 100 using a plurality of links. For example, the links may include a first link 210 and a second link 220.

[0034] The rotating part 300 is provided below the height adjusting part 200 and can rotate the height adjusting part 200 and the cushion part 100 .

[0035] The reinforcing bracket unit 400 is coupled to the lower side of the rotating unit 300 to reinforce the rotating unit 300, and may be installed across a pair of rails 510 of the rail unit 500 spaced apart from each other and located below.

[0036] The reinforcing bracket 400 may be installed across a pair of rails 510 spaced apart in the left-right direction. The reinforcing bracket 400 may be fixed to a slide bracket 520 of the rail 500, and the slide bracket 520 may be movably installed above the rail 510.

[0037] The rail portion 500 is provided so that the seat frame 10 can move in the front-rear direction, and the rotating portion 300 can be provided so that it can move.

[0038] The rail unit 500 may have a lower portion fixed to the bottom of the interior of the vehicle and an upper portion fixed to the rotating unit 300. The rail unit 500 may be provided with a pair of rails 510, and a slide bracket 520 may be provided on the upper side of the pair of rails 510.

[0039] The height adjustment unit 200 may include a first link 210 and a second link 220 .

[0040] The first link 210 may connect the rotating part 300 and the cushion part 100 at the front. A lower part of the first link 210 may be connected to the front of the rotating part 300, and an upper part of the first link 210 may be connected to the front of the cushion part 100. A pair of first links 210 may be provided spaced apart in the left-right direction.

[0041] The first link 210 may have an upper side rotatably coupled to the cushion part 100 and a lower side rotatably coupled to the rotating part 300. Specifically, the lower side of the first link 210 may be rotatably coupled to a connecting bracket 340 of the rotating part 300.

[0042] The second link 220 may connect the rotating part 300 and the cushion part 100 at the rear. The second link 220 may have a lower portion connected to the rear of the rotating part 300 and an upper portion connected to the rear of the cushion part 100. A pair of second links 220 may be provided spaced apart in the left-right direction.

[0043] The second link 220 may include a second link member 221 and a second link bracket 222 .

[0044] The second link member 221 may be rotatably coupled to the cushion part 100 at its upper side and to the rotating part 300 at its lower side.

[0045] The second link bracket 222 may be fixed to the upper side of the rotating part 300 and rotatably coupled to the lower side of the second link member 221. The second link member 221 and the second link bracket 222 arranged on the left side and the second link member 221 and the second link bracket 222 arranged on the right side may have slightly different shapes.

[0046] The rotating part 300 may include a fixed plate 310 , a base plate 330 , and a rotating plate 320 .

[0047] The fixing plate 310 may be disposed below the rotating part 300. A fixing reinforcement 311 may be attached to the lower side of the fixing plate 310 to form a closed cross section, thereby reinforcing the rigidity of the fixing plate 310.

[0048] The base plate 330 may be joined to the upper side of the fixed plate 310 .

[0049] The rotating plate 320 may be disposed above the rotating unit 300. The rotating plate 320 may rotate above the fixed plate 310.

[0050] The rotation plate 320 may be rotatably installed between the fixed plate 310 and the base plate 330 in a circumferential direction. The rotation plate 320 may be prevented from moving away by the lower fixed plate 310 and the upper base plate 330, and may rotate in a circumferential direction based on a vertical rotation axis.

[0051] A ball bearing may be disposed between the rotating plate 320 and the lower fixed plate 310. The fixed plate 310, the ball bearing, and the rotating plate 320 may be disposed in this order from the bottom.

[0052] A ball bearing may be disposed between the rotation plate 320 and the upper base plate 330. The rotation plate 320, the ball bearing, and the base plate 330 may be disposed in this order from the bottom.

[0053] A ball bearing is provided between the fixed plate 310 and the rotating plate 320 so that the rotating plate 320 can rotate with minimal rotational resistance. A ball bearing is provided between the base plate 330 and the rotating plate 320 so that the rotating plate 320 can rotate with minimal rotational resistance.

[0054] The rotating portion 300 may further include a connecting bracket 340 .

[0055] One side of the connecting bracket 340 may be coupled to the upper side of the rotation plate 320, and the other side may be coupled to the first link 210 and the second link 220. A pair of connecting brackets 340 may be provided spaced apart in the left-right direction.

[0056] The connecting bracket 340 may include a connecting bottom plate 341 and a connecting side plate 342 .

[0057] The connecting bottom plate 341 may be coupled to an upper side of the rotation plate 320 and extend in a horizontal direction. The connecting side plate 342 may be coupled to one side of the connecting bottom plate 341 and extend in a vertical direction to intersect with the connecting bottom plate 341, and the first link 210 and the second link 220 may be coupled thereto.

[0058] A lower portion of the first link 210 may be rotatably coupled to the front of the connecting side plate 342, and a lower portion of the second link 220 may be rotatably coupled to the rear of the connecting side plate 342. The first link 210 and the second link 220 may be coupled to an upper region of the connecting side plate 342 in the vertical direction.

[0059] A pair of connecting brackets 340 may be provided on the upper side of the rotation plate 320, spaced apart in the left-right direction, and a connecting side plate 342 may be formed extending upward from a connecting bottom plate 341 in a direction crossing the upper side.

[0060] FIG. 7 is a cross-sectional view of the seat frame 10 of the present invention in the "1" direction.

[0061] The connecting bracket 340 may have a first connecting reinforcement 343 that is provided in front of the connecting bracket 340 and forms a closed cross section together with the connecting bracket 340 .

[0062] The first connecting reinforcement 343 is provided in front of the connecting bracket 340 and can be fixed to the inner surface of the connecting bracket 340 in the left-right direction. The first connecting reinforcement 343 can form a closed cross section together with the connecting bottom plate 341 and the connecting side plate 342 of the connecting bracket 340.

[0063] The connecting bottom plate 341 and the connecting side plate 342 of the connecting bracket 340 both have an "L-shaped" cross section, and the first connecting stiffener 343 may have an "L-shaped" cross section with an inclined section formed at the corner. A closed cross section in the shape of a right triangle may be formed between the inclined section of the first connecting stiffener 343 and the connecting bracket 340.

[0064] The first connection reinforcement 343 is provided around the first link 210 and can reinforce the rigidity of the peripheral portion to which the first link 210 is connected.

[0065] The first link 210 may be coupled to the front of the connecting bracket 340. In this case, the first connecting reinforcement 343 forms a closed cross section together with the connecting bracket 340, thereby reinforcing the rigidity of the peripheral portion where the first link 210 is coupled.

[0066] The first link 210 is connected to the upper side of the connection bracket 340 in the height direction, and the first connection reinforcement 343 is connected to the lower side of the portion where the first link 210 is connected, so that it does not interfere with the first link 210.

[0067] FIG. 8 is a cross-sectional view of the seat frame 10 of the present invention taken in the direction "2", and FIG. 9 is a cross-sectional view of the seat frame 10 of the present invention taken in the direction "3".

[0068] The connecting bracket 340 may have a second connecting reinforcement 344 provided behind the connecting bracket 340 and forming a closed cross section together with the connecting bracket 340 .

[0069] The second connection reinforcement 344 is provided at the rear of the connection bracket 340 and can be fixed to the outer surface of the connection bracket 340 in the left-right direction. The second connection reinforcement 344 can form a closed cross section together with the connection side panel 342 of the connection bracket 340.

[0070] When the connecting bracket 340 and the second connecting stiffener 344 together form a closed cross section, in the closed cross section portion, the connecting bracket 340 can have a "step-like" cross section and the second connecting stiffener 344 can have an "L-shaped" cross section.

[0071] The second connection reinforcement 344 is provided around the second link 220 and can reinforce the rigidity of the peripheral portion to which the second link 220 is connected.

[0072] The rotation plate 320, the connection bracket 340, and the second link 220 may be sequentially connected and fixed from bottom to top. Therefore, the second connection reinforcement 344 may be connected to the rear lower side of the connection bracket 340 without interfering with the second link 220 connected to the upper side of the connection bracket 340. The second connection reinforcement 344 forms a closed cross section together with the connection bracket 340, thereby reinforcing the rigidity of the peripheral portion where the second link 220 is connected.

[0073] A belt fixing device T may be fixed to the upper rear side of the connection bracket 340 , and a second connection reinforcement device 344 may be coupled to the lower rear side of the connection bracket 340 .

[0074] A pair of connecting brackets 340 may be provided spaced apart in the left-right direction, and a belt fastener T to which a seat belt V is fastened may be formed at the rear upper portion of each of the connecting brackets 340 on both sides.

[0075] The belt fastener T located on the left side and the belt fastener T located on the right side may have slightly different shapes. The belt fastener T located on the right side is a seat belt buckle T1 (see Figure 8), and the belt fastener T located on the left side is a seat belt anchor T2 (see Figure 9), and the two may have different shapes.

[0076] The cushion side patch 130 may be connected to the cushion side frame 120 to form a closed cross section and reinforce rigidity, and the seat belt buckle T1 may be connected to the second link bracket 222, which may be fixed to the upper side of the connecting side plate 342 of the connecting bracket 340.

[0077] The second connection reinforcement 344 is provided around the belt fastener T and forms a closed cross section together with the connection bracket 340, thereby reinforcing the rigidity of the periphery of the belt fastener T to which the seat belt V is fastened.

[0078] The belt fixing device T is provided on the upper rear side of the connecting bracket 340, and the second connecting reinforcement device 344 is provided on the lower side of the connecting bracket 340, so that the second connecting reinforcement device 344 does not interfere with the belt fixing device T.

[0079] FIG. 10 is a cross-sectional view of the seat frame 10 of the present invention taken along the line "4".

[0080] The base plate 330 has one side coupled to the upper side of the fixed plate 310 and the other side covering the upper part of the rotating plate 320 disposed on the upper side of the fixed plate 310, thereby preventing the rotating plate 320 from coming off.

[0081] The rotating portion 300 may further include a motor plate 380 and a motor member 390 .

[0082] The motor plate 380 can be fixed to the upper side of the rotating plate 320 .

[0083] The motor member 390 may be provided on the motor plate 380 and may include a drive gear 391 that meshes with a big gear 331 fixed to the base plate 330. The big gear 331 has a gear surface formed on its inner circumferential surface, and the drive gear 391 may be disposed inside the big gear 331 and mesh with it.

[0084] The rotation plate 320 may be rotatably disposed between the fixed plate 310 and the base plate 330. A motor plate 380 having a motor member 390 may be fixed to the upper side of the rotation plate 320. A drive gear 391 of the motor member 390 rotates while meshing with a big gear 331 connected to the base plate 330, thereby rotating the motor plate 380 having the motor and the rotation plate 320 connected to the motor plate 380.

[0085] The drive gear 391 meshes with a rotary gear 393 provided on the rotary shaft of the motor member 390 to transmit a rotational force from the motor member 390 , and the drive gear 391 can mesh with the big gear 331 .

[0086] A pair of connecting brackets 340 and a motor plate 380 may be provided on the upper side of the rotation plate 320. A pair of connecting brackets 340 may be provided spaced apart in the left-right direction on the upper side of the rotation plate 320, and a motor plate 380 extending in the front-rear direction may be disposed in the center portion of the left-right direction between the pair of connecting brackets 340. A connecting side plate 342 of the connecting bracket 340 extends upward from the connecting bottom plate 341 in a direction intersecting the connecting bottom plate 341, thereby ensuring a space above the motor plate 380 for installing a motor member 390.

[0087] FIG. 10 is a cross-sectional view of the seat frame 10 of the present invention taken in the direction "4", and FIG. 11 is a cross-sectional view of the seat frame 10 of the present invention taken in the direction "5".

[0088] The reinforcing bracket portion 400 may include a bracket plate 410 and a bracket reinforcement 450 .

[0089] The bracket plate 410 may be configured as a single member that is provided across the pair of rails 510 and coupled to the fixing plate 310. The bracket plate 410 may be formed to extend such that its left and right ends are disposed above the rails 510 on both sides.

[0090] A motor bracket 530, a slide bracket 520, and a rail 510 may be arranged under the bracket plate 410.

[0091] The slide bracket 520 can be movably mounted on the rail 510 , and the slide bracket 520 forms a locking structure with the rail 510 to prevent the slide bracket 520 from coming off the rail 510 .

[0092] The bracket reinforcement 450 may be comprised of a single member that is coupled between the fixing plate 310 and the bracket plate 410 and reinforces the bracket plate 410 .

[0093] The bracket stiffener 450 may be comprised of a single member that is coupled between the fixed plate 310 and the bracket plate 410 .

[0094] The bracket plate 410 may be provided with a pair of bracket reinforcements 450. The bracket reinforcements 450 may be coupled to the left and right sides of the bracket plate 410, respectively.

[0095] A bracket reinforcement member 450 is overlapped on the upper side of the bracket plate 410 to reinforce it, and the fixing plate 310 of the rotating part 300 may be coupled to the upper side of the bracket reinforcement member 450 .

[0096] A bracket reinforcement member 450 may be coupled to the upper side of the bracket plate 410 for reinforcement, and a motor bracket 530 and a slide bracket 520 may be coupled to the lower side of the bracket plate 410 reinforced by the bracket reinforcement member 450 .

[0097] The slide bracket 520, the motor bracket 530, the bracket plate 410, and the bracket reinforcement member 450 are arranged in this order from bottom to top, and the fixing plate 310 may be coupled to the upper side of the bracket reinforcement member 450.

[0098] The bracket plate 410, the bracket reinforcement member 450, and the fixing plate 310 of the rotating part 300 may have lengths corresponding to each other in the front-rear direction, and may have a longitudinal overlapping section in which they are fixed while overlapping each other in the up-down direction.

[0099] The bracket plate 410, the bracket reinforcement member 450, and the fixing plate 310 of the rotating part 300 may be fixed to each other in a vertically overlapping state using bolts. The fixing plate 310 may be coupled to the bracket plate 410 reinforced by the bracket reinforcement member 450.

[0100] FIG. 12 is a perspective view and a cross-sectional view in the direction of "6" of a portion of the seat frame 10 of the present invention where a reinforcing bead 451 is formed.

[0101] The bracket reinforcement 450 is formed to extend in the front-rear direction along the rail 510, and may have a reinforcing bead 451 that protrudes upward in front of the bracket reinforcement 450. The bracket reinforcement 450 may be formed of a single member that is provided along the front-rear direction, which is the length direction of the rail 510.

[0102] The reinforcing bead 451 may include a protruding surface that protrudes upward and inclined surfaces that are formed on both sides of the protruding surface in the front-rear direction and are inclined downward in the front-rear direction.

[0103] A reinforcing bead 451 protruding upward is formed in front of the bracket reinforcement member 450, allowing the slide bracket 520 to be movably mounted on the rail 510, and the slide bracket 520 forms an engagement structure with the rail 510 to prevent the slide bracket 520 from slipping off the rail 510.

[0104] FIG. 13 is a perspective view and a plan view of a portion of the seat frame 10 of the present invention where a reinforcing bead 451 is formed.

[0105] The reinforcing bead 451 can be disposed on the underside of the rotating plate 320 on a flat surface.

[0106] The left-right length of the front region of the rotating plate 320 on a plane may be longer than the left-right length of the rear region. Furthermore, the left-right ends of the rotating plate 320 in the front region may be disposed above the reinforcing beads 451.

[0107] Since the rotating plate 320 is disposed above the reinforcing bead 451 on a flat surface, when the rotating plate 320 deforms, the rotating plate 320 is caught on the reinforcing bead 451, and the lower part of the rotating plate 320 is supported, thereby preventing the rotating plate 320 from deforming excessively.

[0108] By shortening the length of the rear region of the rotation plate 320 in the left-right direction on a plane, the size of the rotation plate 320 can be reduced, which has the effect of achieving a lighter weight of the part.

[0109] Hereinafter, with reference to FIGS. 14a to 15b, the effect of installing the bracket reinforcement member 450 and the reinforcing bead 451 of the bracket reinforcement member 450 in the embodiment of the present invention will be compared with that of a comparative example.

[0110] 14a and 14b show the results of deformation analysis of the seat frame 10 according to the embodiment of the present invention. Fig. 14a shows the results of deformation analysis of the embodiment at an early stage, and Fig. 14b shows the results of deformation analysis of the embodiment at a later stage.

[0111] Figures 15a and 15b show the results of deformation analysis of the comparative example seat frame 10. Figure 15a shows the results of deformation analysis of the comparative example in the early stage, and Figure 15b shows the results of deformation analysis of the comparative example in the later stage.

[0112] The comparative example differs from the working example in that it does not include components such as the reinforcing bead 451 of the bracket reinforcing member 450, and there are also some differences in the shape of the bracket plate 410.

[0113] In the embodiment of the present invention, the bracket reinforcement member 450 is formed to extend in the front-to-rear direction along the rail 510, and has a reinforcing bead 451 that protrudes upward in front of the bracket reinforcement member 450. The reinforcing bead 451 is arranged below the rotating plate 320 on a plane, so that the rotating plate 320 of the rotating part 300 is stably supported without excessive deformation even in the later stage of deformation.

[0114] On the other hand, in the comparative example, unlike the examples of the present invention, the bracket reinforcement member 450 does not include components such as the reinforcing bead 451, and therefore excessive deformation occurs in the rotating plate 320 of the rotating part 300 in the later stages of deformation.

[0115] FIG. 16 is a cross-sectional view of the seat frame 10 of the present invention taken along the line "7".

[0116] The bracket reinforcement members 450 may overlap and reinforce the upper side of the bracket plate 410, and the slide bracket 520 may be coupled to the lower side of the bracket plate 410.

[0117] The slide bracket 520, the bracket plate 410, and the bracket reinforcement member 450 are arranged in this order from bottom to top and may be coupled together using bolts.

[0118] A bracket plate patch 460 is coupled to the front lower end of the bracket plate 410 in the length direction to prevent the bracket plate 410 from being excessively deformed.

[0119] Although the embodiments of the present invention have been described in detail above, the scope of the present invention is not limited thereto, and it will be apparent to those skilled in the art that various modifications and variations are possible within the scope that does not deviate from the technical idea of ​​the present invention as set forth in the claims. [Explanation of symbols]

[0120] 10 Seat frame 20 Seat back 100 Cushion part 110 Cushion panel 120 Cushion Side Frame 130 Cushion Side Patch 140 Front pipe 150 Rear pipe 200 Height adjustment part 210 First link 220 second link 221 second link member 222 Second link bracket 300 Rotating part 310 Fixing Plate 320 Rotating Plate 330 Base Plate 331 Big Gear 340 Connecting Bracket 341 Connecting bottom plate 342 Connecting side plate 343 First connecting reinforcement 344 Second connecting reinforcement 380 motor plate 390 Motor parts 391 Drive gear 393 Rotating gear 400 Reinforcement bracket 410 Bracket plate 450 Bracket reinforcement 451 Reinforcement bead 460 Bracket plate patch 500 Rail section 510 Rail 520 Slide bracket 530 Motor bracket T-belt fastener T1 seat belt buckle T2 Seatbelt anchor V seatbelt

Claims

1. a cushion portion that supports the cushion; a height adjusting unit provided below the cushion unit and configured to adjust the height of the cushion unit via a plurality of pivot links; a rotating part provided below the height adjusting part and configured to rotate the height adjusting part and the cushion part; a reinforcing bracket portion coupled to a lower side of the rotating portion to reinforce the rotating portion, the reinforcing bracket portion being provided across a pair of rails of the rail portion spaced apart from each other and disposed below the rotating portion; The height adjustment unit is a first link connecting the rotating portion and the cushion portion from the front; a second link connecting the rotating portion and the cushion portion from the rear, The rotating part is a connecting bracket coupled to the first link and the second link, The connecting bracket is The seat frame includes a first connecting reinforcement member provided in front of the connecting bracket and forming a closed cross section together with the connecting bracket.

2. The rotating part is a fixing plate disposed on the lower side; a base plate joined to an upper side of the fixing plate; The seat frame according to claim 1 , further comprising: a rotating plate rotatably provided between the fixed plate and the base plate.

3. The connecting bracket is The seat frame according to claim 2 , wherein one side is coupled to the upper side of the rotating plate and the other side is coupled to the first link and the second link.

4. The connecting bracket is The seat frame according to claim 1 , further comprising a second connecting reinforcement member provided rearward of the connecting bracket and forming a closed cross section together with the connecting bracket.

5. 5. The seat frame according to claim 4, wherein a seat belt is fixed to an upper rear side of the connecting bracket, and the second connecting reinforcement is coupled to a lower rear side of the connecting bracket.

6. The rotating part is a motor plate fixed to an upper side of the rotary plate; The seat frame according to claim 2 , further comprising: a motor member provided on the motor plate and provided with a drive gear that meshes with a big gear fixed to the base plate.

7. The reinforcing bracket portion is a bracket plate formed of a single member that is provided across the pair of rails and is coupled to the fixing plate; 3. The seat frame according to claim 2, further comprising: a bracket reinforcement member formed of a single member coupled between the fixing plate and the bracket plate and reinforcing the bracket plate.

8. The seat frame according to claim 7 , wherein the bracket reinforcement member overlaps and reinforces an upper side of the bracket plate, and a fixing plate of the rotating portion is coupled to an upper side of the bracket reinforcement member.

9. 9. The seat frame according to claim 8, wherein the bracket plate, the bracket reinforcing member, and the fixing plate of the rotating portion have lengths corresponding to each other in the front-rear direction, and a longitudinal overlap section is formed in which the bracket plate, the bracket reinforcing member, and the fixing plate of the rotating portion are fixed while overlapping each other in the up-down direction.

10. 8. The seat frame according to claim 7, wherein the bracket reinforcement member is formed to extend in the front-rear direction along the rail, and has a reinforcing bead that protrudes upward in front of the bracket reinforcement member.

11. The seat frame according to claim 10 , wherein the reinforcing bead is disposed on a plane below the rotating plate.

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