JP2022149932A - Vehicular seat - Google Patents

Abstract

To suppress an increase in weight of a vehicular seat.SOLUTION: A vehicular seat (vehicular seat S) is equipped with right and left cushion side frames 10 disposed on the right and left sides of a seat cushion S1, a coupling pipe (front pipe 20) coupling the right and left cushion side frames 10, and a link (front link 61) that is rotatably coupled to the cushion side frame 10. The coupling pipe has a first part 21 extending in a lateral direction, a second part 22 that is disposed above the first part 21 and is fixed to the cushion side frames 10, and a third part 23 that bends upward from the first part 21 and is connected to the second part 22. The second part 22 is disposed on the link.SELECTED DRAWING: Figure 4

Description

The present invention relates to vehicle seats.

Conventionally, a vehicle seat includes left and right cushion side frames arranged on the left and right sides of a seat cushion, a connecting pipe connecting the left and right cushion side frames, and a link rotatably connected to the cushion side frames. is known (see Patent Document 1). In this technique, the connecting pipe is straight, and the link is bent in an arc to avoid the connecting pipe.

Japanese Patent Application Laid-Open No. 2020-33019

However, in the conventional technology, the shape of the link is greatly bent so as to avoid the connecting pipe, so the weight of the link increases, which may increase the weight of the vehicle seat.

SUMMARY OF THE INVENTION Accordingly, an object of the present invention is to suppress an increase in the weight of a vehicle seat.

In order to solve the above problems, a vehicle seat according to the present invention includes left and right cushion side frames arranged on the left and right sides of a seat cushion, a connecting pipe connecting the left and right cushion side frames, and a seat pivoting to the cushion side frames. and a link that is operably connected.
The connecting pipe includes a first portion extending in the left-right direction, a second portion disposed above the first portion and fixed to the cushion side frame, and a portion bent upward from the first portion to extend the and a third portion connected to the second portion.
The second portion is arranged on the link.

According to this configuration, since the connecting pipe bends so as to avoid the link, there is no need to greatly bend the link as in the conventional art, and the weight of the link can be reduced, which in turn increases the weight of the vehicle seat. can be suppressed.

Further, the link may have a straight shape.

With this configuration, the weight of the link can be made smaller, so that the increase in weight of the vehicle seat can be further suppressed.

Also, the second portion may extend in the left-right direction.

According to this configuration, even if the position of the link deviates in the horizontal direction from the normal position due to an installation error, the vertical direction between the link and the second portion is reduced compared to the case where the second portion extends obliquely with respect to the horizontal direction, for example. can be kept at the desired size.

Further, the rotation shaft of the link with respect to the cushion side frame may be arranged within the range of the joint portion of the connecting pipe with the cushion side frame in the vertical direction.

According to this configuration, since the joint portion between the rotation shaft of the link and the connecting pipe is arranged at substantially the same position in the vertical direction, for example, the vertical width of the cushion side frame can be reduced.

Further, the cushion side frame has a pipe joint portion to which the connecting pipe is joined and a link joint portion to which the link is connected. It may be smaller than the width of the part.

According to this configuration, the weight of the cushion side frame can be reduced, so that the increase in weight of the vehicle seat can be further suppressed.

Further, the cushion side frame may be configured such that at least a portion of the first portion does not overlap the cushion side frame when viewed in the left-right direction.

According to this configuration, the cushion side frame can be made smaller in the vertical direction than, for example, a structure in which the cushion side frame is configured such that the entire first portion overlaps the cushion side frame when viewed in the horizontal direction.

According to the present invention, it is possible to suppress an increase in the weight of the vehicle seat.

Further, by forming the link in a straight shape, it is possible to further suppress an increase in the weight of the vehicle seat.

Further, by configuring the second portion to extend in the left-right direction, the position of the link may be shifted in the left-right direction from the normal position due to mounting error, compared to the case where the second portion extends obliquely to the left-right direction. Also, the vertical gap between the link and the second portion can be maintained at a desired size.

Further, by arranging the rotation shaft of the link within the range of the joining portion of the connecting pipe in the vertical direction, for example, the vertical width of the cushion side frame can be reduced.

Further, by making the width of the pipe joint portion of the cushion side frame smaller than the width of the link connection portion of the cushion side frame in the vertical direction, the weight of the cushion side frame can be reduced, so that the weight of the vehicle seat can be reduced. It is possible to further suppress the growth.

Further, by constructing the cushion side frame so that at least part of the first portion does not overlap with the cushion side frame when viewed in the left-right direction, for example, the entire first portion overlaps with the cushion side frame when viewed in the left-right direction. Compared to a structure in which the cushion side frames overlap each other, the size of the cushion side frames can be reduced in the vertical direction.

1 is a perspective view of a seat according to an embodiment of the invention; FIG. FIG. 3 is a perspective view showing a cushion frame and a back frame; It is the figure which looked at the cushion side frame and the height mechanism from the left-right direction inner side, and is the figure (a) which shows the state where a cushion side frame is located in the highest position, and the figure (b) which shows the state in which the cushion side frame is positioned in the lowest position. . FIG. 4 is a perspective view showing the structure around the right end of the front pipe; FIG. 4 is a cross-sectional view showing the structure around the right end of the front pipe; It is the side view (a) which looked at the bracket from the left-right direction outer side, and the side view (b) which looked at it from the left-right direction inner side. It is the side view which looked at the structure around the bracket of the left side from the left-right direction outer side. FIG. 4 is a cross-sectional view showing the structure around the left bracket; Side view (a) showing treated and non-treated parts of the cushion side frame, (b) cross-sectional view (b) of II in FIG. 9 (a), and (c) perspective view showing an enlarged projection of the treated part is.

An embodiment of the present invention will be described below with reference to the accompanying drawings. In this specification, the front, rear, left, right, and top and bottom are based on the front, back, left, right, and top and bottom as seen from the person sitting on the seat.
As shown in FIG. 1, the vehicle seat according to the present embodiment is configured as a vehicle seat S mounted in an automobile, and includes a seat cushion S1, a seat back S2 and a headrest S3.

The seat cushion S1 is constructed by covering a cushion frame F1 (see FIG. 2) with a cushion pad and an upholstery material. The seat back S2 is constructed by covering a back frame F2 (see FIG. 2) with a pad and a skin material. The headrest S3 is configured by covering a headrest frame (not shown) with a pad and an upholstery material.

As shown in FIG. 2, the cushion frame F1 includes a cushion side frame 10 as a side frame, a pan frame PF, a front pipe 20 as a connecting pipe,
It has a rear pipe RP and a bracket 30 . The cushion side frame 10, the pan frame PF and the bracket 30 are made of plate-like members. The front pipe 20 and the rear pipe RP are made of cylindrical pipe material.

The cushion side frames 10 and the brackets 30 are arranged one by one on the left and right sides of the cushion frame F1 (seat cushion S1). The cushion side frame 10 extends in the front-rear direction. The bracket 30 is fixed to the rear end portion of the cushion side frame 10 .

The pan frame PF and the front pipe 20 connect front end portions of the left and right cushion side frames 10 . The rear pipe RP connects the rear ends of the left and right cushion side frames 10 . The rear pipe RP has a straight shape and extends in the left-right direction.

The back frame F2 has a back side frame 41, an upper frame 42 and a lower frame 43. As shown in FIG. The back side frame 41, the upper frame 42 and the lower frame 43 are made of plate-like members. The back side frames 41 are arranged one each on the left and right sides of the back frame F2 (seat back S2). The back side frame 41 extends vertically.

The upper frame 42 connects upper ends of the left and right back side frames 41 . The lower frame 43 connects the lower ends of the left and right back side frames 41 .

The vehicle seat S further includes a reclining mechanism 50 and a height mechanism 60 . The reclining mechanism 50 is a mechanism for tilting the back frame F2 with respect to the cushion frame F1. The height mechanism 60 is a mechanism for adjusting the height of the cushion frame F1. One reclining mechanism 50 and one height mechanism 60 are arranged on the left and right sides of the cushion frame F1. Bracket 30 rotatably supports backside frame 41 via reclining mechanism 50 .

As shown in FIG. 3( a ), the height mechanism 60 includes a front link 61 as a link and a rear link 62 that is spaced behind the front link 61 . The front link 61 and the rear link 62 have upper ends rotatably connected to the cushion side frames 10 and lower ends rotatably connected to the upper rail UR. The upper rail UR is movably supported in the longitudinal direction by a lower rail (not shown) fixed to the floor of the vehicle body.

The front link 61 is rotatable about the first axis X1 with respect to the cushion side frame 10 . Specifically, the upper end of the front link 61 is rotatably supported by a flanged pin PN fixed to the cushion side frame 10 . The front link 61 is rotatable about the second axis X2 with respect to the upper rail UR.

The rear link 62 is rotatable with respect to the cushion side frame 10 about the third axis X3. Specifically, the upper end of the rear link 62 is rotatably supported by the rear pipe RP. The rear link 62 is rotatable about the fourth axis X4 with respect to the upper rail UR.

The front link 61 is a straight plate-like member. Specifically, a straight line L1 connecting the first axis X1 and the second axis X2 is located between two linear edges 61A of the edges of the front link 61 that face each other in the short direction. The two edges 61A are parallel to each other.

The rear link 62 is a substantially straight plate-like member. Specifically, a straight line L2 connecting the third axis X3 and the fourth axis X4 is located between two straight edges 62A of the edges of the rear link 62 that face each other in the short direction. The two edges 62A are symmetrical with respect to the straight line L2 and are inclined with respect to the straight line L2 so as to approach each other from the upper end to the lower end of the rear link 62 .

The front link 61 and the rear link 62 are rotatable between a raised position shown in FIG. 3(a) and a lowered position shown in FIG. 3(b). The raised position is the position of each link 61, 62 when the cushion side frame 10 is positioned at the top. The lowered position is the position of each link 61, 62 when the cushion side frame 10 is positioned at the lowest position.

The front pipe 20 is arranged in front of the first axis X1. A distance D3 in the longitudinal direction from the front pipe 20 to the first axis X1 is smaller than the length of the front link 61 .

The front pipe 20 is arranged on the second axis X2 when the front link 61 is positioned at the raised position. The front pipe 20 is arranged between the first axis X1 and the second axis X2 in the front-rear direction when the front link 61 is at the lowered position. The front pipe 20 (the first portion 21 described later in detail) overlaps the front link 61 when viewed from the left and right when the front link 61 is positioned at the lowered position.

The cushion side frame 10 has a pipe joint portion 10A to which the front pipe 20 is joined, and a link joint portion 10B to which the front link 61 is joined. In the vertical direction, the width W1 of the pipe joint portion 10A is smaller than the width W2 of the link connecting portion 10B. A first axis X1, which is a rotation axis of the front link 61 with respect to the cushion side frame 10, is arranged within a vertical range W3 of a joint portion (a second portion 22 described later) of the front pipe 20 and the cushion side frame 10. ing.

A portion of the front pipe 20 (more specifically, a portion of the first portion 21 described later) does not overlap the cushion side frame 10 when viewed from the left-right direction. In other words, the lower end of the cushion side frame 10 overlaps the first portion 21 of the front pipe 20 when viewed from the left-right direction.

As shown in FIG. 4, the front pipe 20 includes a first portion 21 extending in the left-right direction, a second portion 22 disposed above the first portion 21 and fixed to the cushion side frame 10 by welding or the like, It has a third portion 23 bent upward from the first portion 21 and connected to the second portion 22 . The second portion 22 and the third portion 23 are provided on the left and right sides of the first portion 21, respectively. The second part 22 is arranged on the front link 61 .

As shown in FIG. 5, the second portion 22 extends in the left-right direction. The third portion 23 includes a first bent portion 23A that bends upward from the first portion 21, a straight portion 23B that obliquely extends upward and outward in the left-right direction from the first bent portion 23A, and a straight line. It has a second bent portion 23C bent outward in the left-right direction from the portion 23B and connected to the second portion 22 . The front link 61 is arranged within the range of the second portion 22 in the left-right direction.

As shown in FIGS. 6 and 7, the bracket 30 includes a first plate-shaped portion 31 fixed to the back side frame 41 via the reclining mechanism 50, and a second plate-shaped portion 32 fixed to the cushion side frame 10. , a fragile portion 33 connected to the first plate-like portion 31 and the second plate-like portion 32 , and a flange 34 . As shown in FIG. 8 , the first plate-shaped portion 31 is arranged outside the back side frame 41 in the left-right direction. The second plate-shaped portion 32 is arranged inside the cushion side frame 10 in the left-right direction. In addition, the first plate-shaped portion 31 is arranged outside the second plate-shaped portion 32 in the left-right direction.

The reclining mechanism 50 includes a fixed member 51 fixed to the bracket 30 and a movable member 52 rotatably supported by the fixed member 51 . The movable member 52 is fixed to the lower end portion of the back side frame 41 by welding or the like.

As shown in FIGS. 6 and 7, the first plate-like portion 31 has a first hole 31A, a second hole 31B, a third hole 31C and a fourth hole 31D for fixing the fixing member 51 of the reclining mechanism 50. have. 31 A of 1st holes and the 2nd hole 31B are arrange|positioned at intervals in the front-back direction. 31 C of 3rd holes and 31 D of 4th holes are arrange|positioned at intervals in the up-down direction. The third hole 31C and the fourth hole 31D are arranged between the first hole 31A and the second hole 31B in the front-rear direction. The third hole 31C is arranged above the first hole 31A and the second hole 31B. The fourth hole 31D is arranged below the first hole 31A and the second hole 31B.

The fixed member 51 has four bosses 51A. The four bosses 51A are spaced apart on a circumference around the rotation axis X5 of the back side frame 41 with respect to the cushion side frame 10 . One boss 51A enters the first hole 31A and one boss 51A enters the second hole 31B. One of the remaining two bosses 51A enters the third hole 31C and the other enters the fourth hole 31D. Each boss 51A is welded to each hole 31A-31D.

The second plate-like portion 32 has a first fixing portion 32A and a second fixing portion 32B that are fixed to the cushion side frame 10 . Holes H1 and H2 through which bolts BL (see FIG. 8) pass are formed in the first fixing portion 32A and the second fixing portion 32B.

The laterally outer surfaces of the first fixing portion 32A and the second fixing portion 32B contact the laterally inner surface of the cushion side frame 10 . As shown in FIGS. 6B and 8, a nut NT to which a bolt BL is fastened is fixed to the inner surfaces of the first fixing portion 32A and the second fixing portion 32B in the left-right direction.

The fragile portion 33 is a portion that becomes a starting point of deformation of the bracket 30 when an impact is applied to the bracket 30 at the time of a vehicle collision or the like. As shown in FIG. 8 , the fragile portion 33 is bent inward in the left-right direction from the lower end of the first plate-shaped portion 31 and then bent downward to be connected to the second plate-shaped portion 32 . That is, the fragile portion 33 is configured so as not to protrude outward in the left-right direction from the outer surface 31F of the first plate-like portion 31 on the outer side in the left-right direction (see FIG. 8).

As shown in FIG. 7, the fragile portion 33 extends from the first fixing portion 32A to the second fixing portion 32B. Specifically, the weakened portion 33 extends from the front end 30A of the bracket 30 to the rear end 30B. The rear portion of the upper end E1 of the cushion side frame 10 extends upward and rearward. A front end 30</b>A of the bracket 30 extends obliquely rearward and upward along a substantially extended line of the rear portion of the upper end E<b>1 of the cushion side frame 10 .

The cushion side frame 10 has a first rear end E2 and a second rear end E3 located above the first rear end E2. An upper portion of the first rear end E2 extends upward. The second rear end E3 extends from the upper end of the first rear end E2 while curving forward and obliquely upward, and is connected to the upper end E1. A rear end 30B of the bracket 30 extends upward along a substantially extended line of the upper portion of the first rear end E2. The weakened portion 33 extends from the upper end E1 of the cushion side frame 10 to the first rear end E2.

A gap D is provided between the fragile portion 33 and the second rear end E3 of the cushion side frame 10 . A distance D1 between the rear end of the fragile portion 33 and the second rear end E3 is larger than a distance D2 between the front end of the fragile portion 33 and the second rear end E3.

As shown in FIG. 6( a ), the fragile portion 33 includes a first arcuate portion 33A that is convex upward and rearward when viewed from the left and right direction, and a second arcuate portion that is convex downward. 33B. The first arcuate portion 33A includes the front end of the bracket 30. As shown in FIG. The second arcuate portion 33B extends from the rear end of the first arcuate portion 33A to the rear end of the bracket 30 .

The first fixing portion 32A, specifically the hole H1, is positioned on the first normal L3 at the predetermined first position P1 of the first arcuate portion 33A. The second fixing portion 32B, specifically the hole H2, is positioned on the second normal line L4 at the predetermined second position P2 of the second arcuate portion 33B.

As shown in FIGS. 6A and 6B, the flange 34 is bent inward in the left-right direction from the rear end 30B of the bracket 30 . The flange 34 extends from the first plate-shaped portion 31 to the second plate-shaped portion 32 via the weakened portion 33 .

As shown in FIG. 9A, the cushion side frame 10 includes a long plate-shaped base wall 11 extending in the front-rear direction and a first flange portion positioned at the lower end of the base wall 11 (one end in the width direction). 12 and a second flange portion 13 positioned at the upper end (the other end in the short direction) of the base wall 11 . The base wall 11 has a surface that intersects with the left-right direction, more specifically, perpendicularly. The base wall 11 has a first mounting hole H11 for receiving the end of the front pipe 20, a second mounting hole H12 for receiving the pin PN (see FIG. 4), and a third mounting hole H13 for receiving the rear pipe RP.

The base wall 11 also has a fourth mounting hole H14 for mounting the first fixing portion 32A of the bracket 30, and a fifth mounting hole H15 for mounting the second fixing portion 32B of the bracket 30. As shown in FIG. The fourth mounting hole H14 is arranged in front of the rear pipe RP, and the fifth mounting hole H15 is arranged behind the rear pipe RP.

As shown in FIG. 9B, the first flange portion 12 has a bent portion 12A and a flat plate portion 12B. The bent portion 12A bends outward in the left-right direction from the lower end of the base wall 11 and then bends back inward in the left-right direction. The flat plate portion 12B extends in the left-right direction (a direction perpendicular to the base wall 11) from the inner end in the left-right direction of the bent portion 12A toward the inner side in the left-right direction. The flat plate portion 12B protrudes inward in the left-right direction from the base wall 11 .

The second flange portion 13 has a bent portion 13A and a flat plate portion 13B. The bent portion 13A bends outward in the left-right direction from the upper end of the base wall 11 and then bends back inward in the left-right direction. The flat plate portion 13B extends in the left-right direction (direction perpendicular to the base wall 11) from the left-right inner end of the bent portion 13A toward the left-right direction inner side. The flat plate portion 13B protrudes inward in the left-right direction from the base wall 11 .

As shown in FIG. 9(a), the first flange portion 12 includes a first processing portion PP1 that is reinforced by embossing (hereinafter also referred to as “embossing”) and a first processing portion PP1 that is embossed. and first non-processing portions NP11 and NP12. The second flange portion 13 has an embossed second processed portion PP2 and a non-embossed second non-processed portion NP2.

As shown in FIG. 9C, the first processing portion PP1 and the second processing portion PP2 have a plurality of convex portions CV formed by embossing. For example, the plurality of convex portions CV are lined up at intervals in a predetermined direction, and are lined up at intervals in an intersecting direction that intersects the predetermined direction.

The first processing portion PP1 and the second processing portion PP2 respectively have bent portions 12A, 13A and flat plate portions 12B, 13B from one end to the other end in the front-rear direction. The plurality of convex portions CV described above are formed on both the bent portions 12A, 13A and the flat plate portions 12B, 13B of the respective processing portions PP1, PP2. Note that the plurality of convex portions CV may be formed on at least one of the bent portion and the flat plate portion.

The first non-processed portion NP11 includes the rear end of the first flange portion 12 . The first non-processed portion NP12 includes the front end of the first flange portion 12 . The first processing part PP1 is arranged between the first non-processing part NP11 and the first non-processing part NP12 in the front-rear direction.

The first non-processed portion NP11 on the rear side has a bent portion 12A and a flat plate portion 12B. The first non-processed portion NP11 on the rear side extends so as to curve upward from the rear end of the first processed portion PP1. The first non-processed portion NP12 on the front side does not have the bent portion 12A and has only the flat plate portion 12B. Specifically, the first non-processed portion NP12 on the front side extends in the left-right direction after bending inward in the left-right direction from the lower end of the base wall 11 .

The second processing portion PP2 includes the rear end of the second flange portion 13 . The second non-processing part NP2 is arranged before the second processing part PP2. The second non-processed portion NP2 includes the front end of the second flange portion 13 . The second non-processed portion NP2 does not have the bent portion 13A and has only the flat plate portion 13B. Specifically, the second non-processed portion NP2 extends in the left-right direction after bending inward in the left-right direction from the upper end of the base wall 11 .

The lengths from one end to the other end in the front-rear direction of the first non-processed portions NP11 and NP12 are each smaller than the length from one end to the other end in the front-rear direction of the first processed portion PP1. The length from one end to the other end in the front-rear direction of the second non-processed portion NP2 is smaller than the length from one end to the other end in the front-rear direction of the second processed portion PP2.

The length from one end to the other end in the front-rear direction of the first processing portion PP1 is longer than the length from one end to the other end in the front-rear direction of the second processing portion PP2. In the front-rear direction, the second processing part PP2 is arranged within the range of the first processing part PP1.

The rear end of the first processing portion PP1 is located behind the rear pipe RP and ahead of the fifth mounting hole H15. The rear end of the second processing portion PP2 is located behind the fourth mounting hole H14 and ahead of the rear pipe RP.

The front end of the first processing part PP1 is positioned in front of the front pipe 20 . The front end of the second processing part PP2 is located behind the front link 61 .

According to the above, the following effects can be obtained in this embodiment.
As shown in FIG. 8, the second plate-like portion 32 of the bracket 30 is arranged inside the cushion side frame 10 in the left-right direction, so that it is possible to suppress the vehicle seat S from increasing in size in the left-right direction. .

Since the first plate-shaped portion 31 is arranged laterally outside the second plate-shaped portion 32, for example, compared to the case where the first plate-shaped portion and the second plate-shaped portion are arranged at the same position in the horizontal direction, the The cushion side frames 10 can be arranged on the inner side in the left-right direction, and the vehicle seat S can be prevented from being enlarged in the left-right direction.

Since the bracket 30 has the fragile portion 33 , the bracket 30 can be deformed starting from the fragile portion 33 at the time of a collision, so that the impact can be absorbed by the bracket 30 .

Since the fragile portion 33 does not protrude laterally outward from the laterally outer outer surface 31F of the first plate-shaped portion 31, for example, the fragile portion may protrude laterally outward from the laterally outer outer surface of the first plate-shaped portion. In comparison, it is possible to suppress the vehicle seat S from increasing in size in the left-right direction.

As shown in FIG. 7, since the fragile portion 33 extends from the front end to the rear end of the bracket 30, the bracket 30 can be easily deformed in the event of a collision, as compared with a structure in which the fragile portion does not extend to the end of the bracket. can.

Since the fragile portion 33 extends from the first fixing portion 32A to the second fixing portion 32B, the shock applied to the backside frame 41 at the time of collision is absorbed by the fragile portion 33, and then the first fixing portion 32A and the second fixing portion 32B are moved. Since it is transmitted to the fixed portion 32B, it is possible to suppress damage to the first fixed portion 32A and the second fixed portion 32B.

Since the gap D is provided between the fragile portion 33 and the second rear end E3 of the cushion side frame 10, the first plate-like portion 31 of the bracket 30 is positioned close to the second rear end E3 of the cushion side frame 10 at the time of collision. The bracket 30 can be deformed so as to approach (move downward).

As shown in FIG. 4, since the front pipe 20 bends so as to avoid the front link 61, there is no need to greatly bend the link as in the conventional art, and the weight of the link can be reduced. It is possible to suppress the increase in weight.

Since the front link 61 has a straight shape, the weight of the front link 61 can be reduced compared with the case where the front link has a bent shape, for example, and an increase in the weight of the vehicle seat S can be suppressed. can.

Since the second portion 22 of the front pipe 20 extends in the left-right direction, compared to the case where the second portion extends obliquely to the left-right direction, even if the position of the front link 61 deviates in the left-right direction from the normal position due to mounting error, , the vertical gap between the front link 61 and the second portion 22 can be maintained at a desired size.

As shown in FIG. 3, the first axis X1, which is the rotation axis of the front link 61 with respect to the cushion side frame 10, is arranged within a range W3 of the joint portion of the front pipe 20 with the cushion side frame 10 in the vertical direction. Therefore, the vertical width of the cushion side frame 10 can be reduced.

Since the width of the pipe joint portion 10A of the cushion side frame 10 is smaller than the width of the link connecting portion 10B in the vertical direction, the weight of the cushion side frame 10 can be reduced, and the weight of the vehicle seat S is increased. can be suppressed.

A part of the first portion 21 of the front pipe 20 does not overlap the cushion side frame 10 when viewed from the left and right direction. The frame 10 can be made smaller in the vertical direction.

As shown in FIG. 9, each of the flange portions 12 and 13 has the embossed treated portions PP1 and PP2, so that the rigidity of the cushion side frame 10 can be increased.

Since the first flange portion 12 has the first non-processed portion NP11 that is not embossed, the first non-processed portion NP11 can be used as a portion that absorbs the impact at the time of collision.

Since the first processing portion PP1 has a plurality of convex portions CV formed by embossing, the rigidity of the first processing portion PP1 can be increased by the plurality of convex portions CV.

By disposing the first non-processed portion NP11 at the rear end of the first flange portion 12, the first non-processed portion NP11 at the rear end of the cushion side frame 10 can be deformed together with the bracket 30 at the time of collision. The impact can be absorbed by deformation of the bracket 30 and the first non-processed portion NP11.

Since the lengths from one end to the other end in the front-back direction of the first non-processing portions NP11 and NP12 are each smaller than the length from one end to the other end in the front-back direction of the first processing portion PP1, for example, the first processing portion The rigidity of the cushion side frame 10 can be increased as compared with a configuration in which the length of the first non-processed portion is shorter than the length of each first non-processed portion.

Since the second processing portion PP2 is arranged on the rear side of the second flange portion 13, the rigidity of the rear portion of the second flange portion 13 to which a large load from the occupant is applied is increased by the second processing portion PP2. can be done. Further, by forming the front portion of the second flange portion 13 as the second non-processed portion NP2, the accuracy of the shape and position of holes for attaching other members to the front portion of the second flange portion 13 can be increased. can do.

Since the length from one end to the other end in the front-rear direction of the second non-processed portion NP2 is smaller than the length from one end to the other end in the front-rear direction of the second processed portion PP2, for example, the length of the second processed portion is The rigidity of the cushion side frame 10 can be increased as compared with a configuration shorter than the length of the second non-processed portion.

Since the length from one end to the other end of the first processing portion PP1 in the front-rear direction is longer than the length from one end to the other end of the second processing portion PP2 in the front-rear direction, the rigidity of the lower portion of the cushion side frame 10 is increased. can do.

Since the second processing portion PP2 is arranged within the range of the first processing portion PP1 in the front-rear direction, for example, compared to a configuration in which the second processing portion is arranged outside the range of the first processing portion in the front-rear direction, the cushion side The rigidity of the frame 10 can be increased.

The present invention is not limited to the above-described embodiments, and can be used in various forms as exemplified below.

In the above-described embodiment, the first plate-shaped portion 31 is arranged laterally outside the second plate-shaped portion 32, but the present invention is not limited to this. may be arranged at the same position in the horizontal direction.

In the above embodiment, the bracket 30 is provided with the weakened portion 33, but the present invention is not limited to this, and the bracket may not have the weakened portion.

The structure of the front pipe 20 having the first part 21, the second part 22 and the third part 23 can be applied to other pipes such as a rear pipe as long as it is a connection pipe that connects the left and right cushion side frames. . Further, the link is not limited to the link forming the height mechanism 60, and may be any link as long as it is rotatably connected to the cushion side frame.

The embossing process is not limited to the flanges 12 and 13 of the cushion side frame 10, and may be applied to the flanges of the back side frame, for example. That is, the embossing process may be applied to any flange portion of the side frame. Further, the strengthening treatment applied to the flange portion is not limited to embossing treatment, and may be quenching treatment. For hardening, for example, induction hardening or laser hardening can be employed.

The strengthening treatment applied to the flange portion may be applied to at least a portion of the flange portion, for example, the entire flange portion may be subjected to the strengthening treatment. That is, the flange portion may have only the treated portion and may not have the non-treated portion. Further, the reinforcing treatment may be applied to the base wall in addition to the flange portion.

In the above-described embodiment, the bent portions 12A and 13A of the flange portions 12 and 13 project laterally outward, but the present invention is not limited to this. It may have a shape that bends inward in the left-right direction without protruding outward.

In the above-described embodiment, the fragile portion 33 is configured so as not to protrude laterally outward from the laterally outer outer surface 31F of the first plate-shaped portion 31, but the present invention is not limited to this. , and may be bent so as to protrude outward in the left-right direction from the outer surface of the first plate-like portion on the outer side in the left-right direction.

In the above-described embodiment, the vehicle seat S used in an automobile was exemplified as a vehicle seat, but the present invention is not limited to this, and other vehicle seats, such as seats used in ships and aircraft. can also be applied to

Each element described in the above embodiment and modifications may be implemented in any combination.

REFERENCE SIGNS LIST 10 cushion side frame 20 front pipe 21 first part 22 second part 23 third part 61 front link S vehicle seat S1 seat cushion

Claims (6)

Left and right cushion side frames arranged on the left and right of the seat cushion,
A connection pipe that connects the left and right cushion side frames,
a link rotatably connected to the cushion side frame;
The connecting pipe is
a first portion extending in the left-right direction;
a second part disposed above the first part and fixed to the cushion side frame;
a third portion bent upward from the first portion and connected to the second portion;
A vehicle seat, wherein the second portion is arranged on the link. 2. The vehicle seat of claim 1, wherein said link is straight. 3. The vehicle seat according to claim 1, wherein the second portion extends in the left-right direction. 4. A pivot shaft of the link with respect to the cushion side frame is arranged within a range of a joint portion of the connecting pipe with the cushion side frame in the vertical direction. 1. A vehicle seat according to claim 1. The cushion side frame is
a pipe joint to which the connecting pipe is joined;
a link connecting portion to which the link is connected;
The vehicle seat according to any one of claims 1 to 4, wherein the width of the pipe joint portion is smaller than the width of the link connection portion in the vertical direction. 6. The vehicle seat according to any one of claims 1 to 5, wherein at least part of the first portion does not overlap the cushion side frame when viewed in the left-right direction.

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