JP2016159819A - Vehicle seat - Google Patents

Abstract

PROBLEM TO BE SOLVED: To provide a vehicle seat with a rail device which improves weld strength between components, and facilitates welding work.SOLUTION: A vehicle seat S with a rail device 40 for supporting a seat body which can move back and forth, includes a connection bracket 50 for connecting a cushion frame 10 and an upper rail 42. A welding mark 60 is formed in a manner that an outer peripheral part of an area where the connection bracket 50 and the upper rail 42 vertically in contact with each other is laser-welded from both sides in a seat width direction. The welding mark 60 in the outer peripheral part includes a first weld part 61 extending along an outside surface in the seat width direction, and a second weld part 62 extending along an inside surface in the seat width direction.SELECTED DRAWING: Figure 3

Description

  The present invention relates to a vehicle seat, and more particularly, to a vehicle seat provided with a rail device that supports a seat body so as to be movable in the longitudinal direction of the seat.

2. Description of the Related Art Conventionally, in a vehicle seat provided with a rail device that supports a seat body so as to be movable in the longitudinal direction of the seat with respect to a vehicle body floor, a connection bracket having a substantially L-shaped body is used to connect the seat body and the rail device. It has been.
Although the connecting bracket is generally attached to the upper surface of the upper rail of the rail device using bolts, rivets, etc., a new technique for joining by laser welding is known for the purpose of reducing the number of parts and reducing the weight of the seat. Yes (see Patent Documents 1 and 2).

In the vehicle seats described in Patent Document 1 and Patent Document 2, the connection bracket and the upper rail (movable rail) are joined to each other by laser welding from above the connection bracket in a state where the connection bracket and the upper rail (movable rail) are in contact with each other in the vertical direction. .
And while ensuring the joint strength by laser welding, the welding location is taken into consideration in order to simplify the welding operation, and the weld bead (welding mark) formed by laser welding has a predetermined shape on the upper surface of the connecting bracket. It extends as if making.

JP 2009-202814 A JP2013-107558A

However, in Patent Documents 1 and 2, since the laser beam is irradiated from directly above the connection bracket toward the connection bracket and the upper rail, a part of the connection bracket is mainly melted and joined to the upper rail. As compared with the case where the laser beam is directly applied to the portion where the upper rail is in contact with the upper rail, the welding strength may be reduced.
Also, since the connecting bracket is generally thicker than the upper rail, laser welding from directly above the connecting bracket may reduce the welding strength, and it may be necessary to increase the laser irradiation intensity, which is affected by heat. There was a possibility of becoming easy.
Therefore, there has been a demand for a technique that can further improve the joining strength by laser welding and facilitate the welding work.

  In addition, some of the above vehicle seats further include a height link device and a reclining device that support the seat body so that the seat body can be moved up and down, and laser welding work is performed in consideration of the positional relationship with the components of these devices. It was necessary to perform assembly work including.

The present invention has been made in view of the above-described problems, and an object of the present invention is for a vehicle with a rail device capable of improving the joining strength by welding of components and facilitating welding work. To provide a sheet.
Another object of the present invention is to provide a vehicle seat with a rail device capable of performing assembly work including welding work in consideration of the positional relationship with components such as a height link device. is there.

  According to the vehicle seat of the present invention, the seat is a seat cushion that is a seating portion, a lower rail that is mounted on a vehicle body floor and extends in a predetermined direction, and is slidably mounted along the lower rail. An upper rail that supports a cushion, and a connection bracket that is mounted on the upper rail to connect the upper rail and the seat cushion, and the connection bracket abuts against a contacted portion provided on the upper rail. Welding the outer peripheral portion of the portion where the corresponding contact portion and the contacted portion are in contact with each other, thereby forming a welding mark on at least one of the contact portion and the contacted portion, The weld mark is solved by extending along the outer peripheral portion.

As described above, since the outer peripheral portion of the contacted portion of the upper rail and the contact portion of the connecting bracket is welded, the upper rail and the connecting bracket are in contact with each other as compared with the conventional example. Since the portions can be directly welded, the joint strength by welding can be improved.
Moreover, since the weld trace formed by welding extends along the outer peripheral part of the part which contact | abutted mutually, welding strength can be improved further.

At this time, the abutment portion abuts in the vertical direction with respect to the abutted portion, and the connection bracket is mounted on the upper rail by laser welding of the outer peripheral portion from at least one side in the seat width direction. It is good to be attached to.
As described above, by performing laser welding from the outside or the inside in the sheet width direction, the welding operation can be performed from a position where a space is relatively easily secured.
Moreover, welding work can be performed more easily by selecting laser welding among various welding methods.

At this time, the welding mark includes a first welded portion extending along an outer side surface in the sheet width direction, a second welded portion extending along an inner side surface in the sheet width direction, of the outer peripheral portion, It is good to have.
With the above configuration, the joining strength of the connecting bracket can be further improved, and particularly stress applied in the seat width direction can be efficiently received.

At this time, a notch is formed in a part of the outer peripheral portion in the contact portion, and the welding mark may extend along the outer peripheral portion including the notch.
By forming the notch, the weldable outer peripheral portion can be extended, so that the welding strength is improved and the degree of freedom of the welding position is increased.

At this time, the connecting bracket includes a bottom wall portion that contacts the upper surface of the upper rail, a side wall portion that continuously extends upward from an inner portion of the bottom wall portion in the seat width direction, and to which the seat cushion side is attached, The notch is preferably formed in an outer portion of the bottom wall portion in the sheet width direction.
With the above configuration, when forming the cutout in the outer peripheral portion of the bottom wall portion, it is possible to provide the cutout at a position where the laser welding operation can be easily performed while avoiding the position of the side wall portion.

At this time, the seat cushion and the connection bracket are connected to each other, and the first link and the second link are attached so as to be rotatable with respect to the connection bracket. The first link is the second link. It is preferable that the second link is disposed in front of the seat and is disposed at a position different from the second link in the seat width direction.
In general, in a vehicle seat equipped with a height link device, it is necessary to design the height operation lever so that it does not protrude as far as possible from the seat body to the outside in the seat width direction. For example, it faces the height operation lever. A technique is known in which the second link (drive link) in position is offset inward with respect to the first link.
When the link brackets are offset to obtain the joint bracket joining strength more than usual, the above-described configuration makes it possible to sufficiently secure the joint bracket joint strength.

At this time, it is preferable that a plurality of the notches be formed between the first link and the second link in the longitudinal direction of the seat.
As described above, since the notch is formed at a position avoiding components such as links, the work of welding toward the notch is facilitated.

At this time, the side wall portion is formed to bend in a direction away from the bottom wall portion in the seat width direction from the portion to which the first link is attached toward the portion to which the second link is attached. The bracket may include a reinforcing wall portion that connects the bottom wall portion and a portion to which the second link is attached in the side wall portion, and extends upward from the bottom wall portion toward the side wall portion. .
With the above configuration, even when the second link is offset inward with respect to the first link in consideration of the arrangement relationship of the height link device, the rigidity around the second link can be increased by providing the reinforcing wall portion. .
Further, when the second link is offset as described above, if the outer peripheral portion where the upper rail and the connecting bracket are in contact with each other is to be laser-welded from the inner side in the seat width direction, the portion of the connecting bracket that protrudes toward the second link is obstructive. Therefore, it becomes difficult to irradiate the laser appropriately aiming at the outer peripheral portion. However, with the above-described configuration of the present invention, the reinforcing wall portion extends upward from the bottom wall portion toward the side wall portion, so that it is possible to avoid a position that hinders laser irradiation.
Specifically, in general, when a laser beam is irradiated onto a target part, a part of the laser beam will bounce off, so it is necessary to avoid placing components in the area where the reflected laser beam passes. If it is the structure of a connection bracket, the operation | work of laser welding can be performed suitably.

At this time, the reinforcing wall portion is inclined upward from the bottom wall portion toward the side wall portion. The reinforcing wall portion protrudes upward and extends from the portion continuous to the bottom wall portion to the side wall. It is preferable that a reinforcing convex portion extending to a portion continuous with the portion is formed.
As described above, since the reinforcing wall portion is inclined upward from the bottom wall portion toward the side wall portion, for example, the laser welding operation can be performed more suitably by considering the reflection angle of the laser.
Moreover, since the reinforcing convex part is formed, the rigidity around the second link can be further increased.

According to the first aspect of the present invention, as compared with the conventional example, since the portion where the upper rail and the connecting bracket are in contact can be directly welded, the joint strength by welding can be improved. Moreover, since the welding trace extends along the outer peripheral portion of the portions that are in contact with each other, the welding strength can be further improved.
According to the second aspect of the present invention, by performing laser welding from the outside or the inside in the sheet width direction, a welding operation can be easily performed from a position where a space is relatively easily secured.
According to the invention of claim 3, the joint strength of the connecting bracket can be further improved, and particularly the stress applied in the sheet width direction can be received efficiently.

According to invention of Claim 4, since the outer peripheral part which can be welded can be extended by the said notch, welding strength improves and the freedom degree of a welding position becomes high.
According to the fifth aspect of the present invention, the notch is formed at a position where the laser welding operation can be easily performed after avoiding the position of the side wall at the outer peripheral portion of the bottom wall.
According to the sixth aspect of the present invention, when the connecting strength of the connecting bracket is generally required by offsetting the links, it is possible to sufficiently secure the connecting strength of the connecting bracket.

According to the seventh aspect of the invention, the work of welding toward the notch is facilitated.
According to the invention of claim 8, even when the second link is offset with respect to the first link in consideration of the arrangement relationship of the height link device, the rigidity around the second link can be increased. Further, even when the second link is offset as described above, the laser welding operation can be suitably performed.
According to the ninth aspect of the present invention, for example, laser welding can be performed more preferably in consideration of the reflection angle of the laser. Further, the rigidity around the second link can be further increased.

It is a perspective view of a vehicular seat concerning this embodiment. It is a perspective view of the seat frame used as the frame of a vehicular seat. FIG. 3 is an enlarged view of a main part of FIG. 2, showing a connection bracket for connecting a seat cushion and a rail device. It is a front view explaining the state where the connection bracket was attached to the rail apparatus (upper rail). FIG. 5 is a cross-sectional view taken along the line VV in FIG. 3, illustrating a state in which laser welding is performed from the outside and the inside in the sheet width direction. FIG. 4 is a cross-sectional view taken along line VI-VI in FIG. 3, illustrating a state in which laser welding is performed from the outside and the inside in the sheet width direction.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS.
The present embodiment is a vehicle seat including a rail device that supports a seat body so as to be movable back and forth, and includes a connection bracket for connecting a cushion frame and an upper rail, and the connection bracket and the upper rail abut on each other. The outer peripheral portion of the welded portion is laser-welded from both sides in the sheet width direction to form a welding mark, and the welding mark is a first welded portion extending along the outer side surface in the sheet width direction of the outer peripheral portion. And a second welded portion extending along the inner side surface in the seat width direction.
The side on which the occupant sits with respect to the seat back of the vehicle seat is the front side of the seat.

  As shown in FIG. 1, a vehicle seat S of the present embodiment includes a seat body including a seat cushion 1 and a seat back 2, and a seat back 2 with respect to the seat cushion 1 as shown in FIG. 2. A reclining device 20 that connects the seat body to the vehicle body floor, a height link device 30 that connects the seat body to the vehicle body floor so as to be movable up and down, and a rail device 40 that is attached to the vehicle body floor and supports the seat body so as to be movable back and forth. , Mainly consists of.

As shown in FIG. 1, the seat cushion 1 is a seating portion that supports an occupant from below, and a cushion pad 1 a is placed on a cushion frame 10 shown in FIG. 2 that is a skeleton and is covered with a skin material 1 b. It is configured.
The seat back 2 is a backrest portion that supports the back of the occupant from the rear, and is configured by placing a cushion pad 2a on a back frame serving as a skeleton and covering with a skin material 2b.

As shown in FIG. 2, the cushion frame 10 is formed of a substantially rectangular frame that is a skeleton of the seat cushion 1, and connects the side frames 11 disposed on the left and right sides and the front portions of the side frames 11. Plate-like pan frame 12, pipe-like rear connection frame 13 that connects the rear portions of the side frames 11, and three elastic members that are hooked to the pan frame 12 and the rear connection frame 13 and extend like a snake. The spring 14 is mainly composed of.
The side frame 11 is a sheet metal member that extends in the front-rear direction of the seat and has a substantially I-shaped vertical cross section. A reclining device 20 is attached to the rear portion of the side frame 11 and a height link device 30 is interposed on the lower portion thereof. A rail device 40 is attached.

As shown in FIG. 2, the reclining device 20 can be switched between a locked state in which the rotational operation of the seat back 2 is locked and an unlocked state, and the seat back 2 is locked in a standing posture. This is a device capable of releasing the locked state and adjusting the standing posture of the seat back 2 by operating a lycra operation lever (not shown).
More specifically, the reclining device 20 is attached to the rear portion of the seat cushion 1 and urges the back rotation shaft 21 serving as a rotation center and the seat back 2 to rotate forward about the back rotation shaft 21. The spiral spring 22 is mainly composed of.
The back rotating shaft 21 is pivotally supported on the seat cushion 1 side and the seat back 2 side in the seat width direction, and one end of the spiral spring 22 is locked on the seat cushion 1 side, and the other end is on the seat back 2 side. It is locked to.

As shown in FIGS. 2 and 3, the height link device 30 is attached between the cushion frame 10 and the rail device 40, and is disposed on the left and right first links 31 disposed on the front side of the seat and on the rear side of the seat. The left and right second links 32 are provided, and the second link 32 serves as a drive link and can adjust the height of the seat body.
In addition, a sector gear portion (not shown) is formed as a gear on a part of the outer peripheral portion of the second link 32 at the coupling portion on the cushion frame 10 (side frame 11) side, and a brake unit described later 34 is meshed with a pinion gear (not shown) provided on the left and right inner sides.

Further, the height link device 30 is pivotally supported on a side surface of the side frame 11 in the seat width direction, and is attached to the brake rotating shaft 33 protruding outward and the brake rotating shaft 33 so as to be rotatable. A brake unit 34 that restricts the operation, and a height operation lever 35 that is rotatably attached via the brake rotation shaft 33 and the brake unit 34 and that moves the seat body up and down.
When the height operation lever 35 is operated, the pinion gear rotates integrally with the brake rotation shaft 33, and the meshing position between the pinion gear and the sector gear portion changes. Further, the second link 32 on the left side where the sector gear portion is formed rotates, and the second link 32 on the right side and the first link 31 on the left and right also rotate following the second link 32 on the left side. As a result, the seat body moves up and down and the seat height is adjusted.

As shown in FIGS. 2 and 3, the rail device 40 is fixed to the vehicle body floor and extends left and right lower rails 41 that extend in the front-rear direction of the seat, and left and right upper rails 42 that are slidably supported along the lower rails 41. It mainly comprises a lock member (not shown) that locks the upper rail 42 so that it cannot slide, and a rail operation lever 43 that releases the lock state of the lock member.
The lower rail 41 is formed of a long hollow body, and is disposed on the left and right sides with a space in the seat width direction, and an accommodation space having a substantially convex cross section is formed along the seat front-rear direction.
The upper rail 42 is formed of a long body that slides along the lower rail 41 in a state of being inserted into the accommodation space of the lower rail 41, and an upper portion of the upper rail 42 is connected to the cushion frame 10 via the connection bracket 50 as shown in FIG. 3. It is connected to the side.

As shown in FIGS. 3 and 4, the connecting bracket 50 is made of a sheet metal member having a substantially L-shaped longitudinal section extending in the front-rear direction of the seat, and includes an upper rail 42 and a link 31 on the cushion frame 10 side in the vertical direction. 32 is a member for connecting the two.
The connecting bracket 50 continuously extends upward from the bottom wall portion 51 contacting the upper surface of the upper rail 42 and the inner end portion of the bottom wall portion 51 in the left-right direction, and the links 31 and 32 are rotatably attached. Main wall portion 52 and front wall portion 53 that continuously extends upward from the front end portion of bottom wall portion 51 and is also connected to the front end portion of side wall portion 52.
The bottom wall portion 51 corresponds to a contact portion that contacts the upper surface (contacted portion) of the upper rail 42 in the claims.

The bottom wall portion 51 extends along the upper rail 42, and is provided on the outer surface in the sheet width direction with a predetermined interval and is cut out toward the inner side in the sheet width direction. A plurality of are formed.
The cutout 51a is a portion cut out in a substantially rectangular shape, and extends inward in the sheet width direction in a range that does not reach the center of the upper rail 42 in the sheet width direction. Further, it is disposed between the first link 31 and the second link 32 in the front-rear direction of the seat.
The bottom wall portion 51 is joined to the upper rail 42 by laser welding of the outer peripheral portion of the portion where the bottom surface and the upper surface of the upper rail 42 are in contact with each other.
More specifically, the outer peripheral portion is laser-welded from the outside and the inside in the sheet width direction, so that a welding mark 60 is formed on both the bottom wall portion 51 and the upper surface of the upper rail 42.

The side wall portion 52 extends in the front-rear direction along the bottom wall portion 51, and moves away from the bottom wall portion 51 in the seat width direction from the portion where the first link 31 is attached toward the portion where the second link 32 is attached. It is bent in the direction.
Further, in the side wall 52, between the first link 31 and the second link 32, an upper end flange 52a extending in the front-rear direction of the seat and a rail for a known device around the rail device 40 or its periphery are passed. A harness passage hole 52b is formed.
The upper end flange 52a and the harness passage hole 52b are formed at positions facing the notch 51a in the seat front-rear direction.

A reinforcing wall portion 54 extending upward from the bottom wall portion 51 toward the side wall portion 52 is formed at a portion where the bottom wall portion 51 and a portion to which the second link 32 is attached in the side wall portion 52 are formed.
The reinforcing wall portion 54 is inclined upward from the bottom wall portion 51 toward the side wall portion 52. Specifically, the reinforcing wall portion 54 is at an angle of about 15 to 45 degrees, preferably about 30 degrees with respect to the bottom wall portion. Inclined upward.
Further, the reinforcing wall portion 54 is formed with a reinforcing convex portion 54a swelled upward. The reinforcing protrusions 54a extend from a portion connected to the bottom wall portion 51 in the reinforcing wall portion 54 to a portion connected to the side wall portion 52, and a plurality of reinforcing protrusions 54a are formed at predetermined intervals in the seat front-rear direction.

As shown in FIGS. 3 to 6, the welding mark 60 is formed by laser welding a part of the outer peripheral portion of the portion where the bottom wall portion 51 and the upper surface of the upper rail 42 are in contact with each other.
The welding mark 60 includes a first welding portion 61 extending along an outer side surface in the sheet width direction and a second welding portion 62 extending along an inner side surface in the sheet width direction among the outer peripheral portion. I have.
The first welded portion 61 extends along the outer surface including the notch 51a in the outer peripheral portion of the bottom wall portion 51. More specifically, the first welded portion 61 extends so as to be discontinuous at the position of the notch 51a. .
The second welded portion 62 extends continuously along the inner surface of the outer peripheral portion of the bottom wall portion 51.

The said structure WHEREIN: The 1st welding part 61 and the 2nd welding part 62 are each formed by carrying out laser welding from the outer side and inner side of a sheet | seat width direction.
Therefore, the welding operation can be performed from a position where a space is relatively easily secured.

In the above configuration, as shown in FIGS. 3 and 4, the second link 32 is disposed at a position inside the sheet width direction with respect to the first link 31 (offset arrangement).
In general, in the seat with the height link device 30, the height operation lever 35 is connected to the height operation lever 35 via the brake unit 34 so that the height operation lever 35 does not protrude from the seat body to the outside in the seat width direction as much as possible. The two links 32 (drive links) are offsetly arranged on the inner side in the sheet width direction.
When the link bracket 50 is offset from the link as described above, the connection strength of the connection bracket 50 is required more than usual. If the present structure adopts laser welding as described above, the connection strength of the connection bracket 50 is sufficiently ensured. can do.

Further, in the above configuration, the connecting bracket 50 is formed with a reinforcing wall portion 54 having an inclined shape as a chamfered portion corresponding to the offset arrangement of the second link 32.
In general, when laser welding is attempted from the inner side in the sheet width direction, a portion of the connecting bracket 50 that protrudes toward the second link 32 obstructs and it is difficult to appropriately perform laser irradiation. However, if it is the structure of this invention, the part which becomes obstructive when irradiating a laser with the reinforcement wall part 54 can be avoided.
Specifically, when the target part is irradiated with the laser, a part of it is reflected and rebounds, so it is necessary to avoid placing components in the area where the reflected laser passes. If it is the structure of the connection bracket 50, the operation | work of laser welding can be performed suitably.

<Other embodiments>
In the above embodiment, as shown in FIG. 3, the vehicle seat S is configured to include the height link device 30, but is not necessarily required, and the cushion frame 10 (side frame 11) and the connection bracket 50 are provided. It may be directly connected.
Further, instead of the connection bracket 50, a connection portion may be integrally provided at the lower end portion of the side frame 11, and the connection portion and the upper rail 42 may be connected.

  In the said embodiment, although the connection bracket 50 is attached on the upper rail by laser welding, various welding methods, such as arc welding and spot welding, are employ | adopted, without being specifically limited to laser welding. Also good.

In the above embodiment, as shown in FIG. 3, the connection bracket 50 is joined on the upper rail 42 by laser welding the outer peripheral portion of the portion in contact with the upper rail 42 from both sides in the seat width direction. The direction and location of laser welding can be changed without any particular limitation.
For example, the outer peripheral portion may be laser welded only from the outside in the sheet width direction, or may be laser welded only from the front side of the sheet.
When the outer peripheral portion is laser-welded only from the outer side in the sheet width direction, the welding mark 60 is formed only on the first welded portion 61.
At this time, the welding location of the 1st welding part 61 is also arbitrary, for example, when the notch 51a is not formed, the 1st welding part 61 is continuously extended along the outer surface of the said outer peripheral part. It may be extended or may be discontinuously extending with a gap. For example, even when the notch 51a is formed, the first welding portion 61 may continuously extend along the outer surface including the entire circumference of the notch 51a.

In the above-described embodiment, as shown in FIG. 3, a weld mark 60 is formed on both the connection bracket 50 and the upper rail 42 by laser welding the outer peripheral portion of the portion where the connection bracket 50 and the upper rail 42 abut. However, the weld marks 60 are not necessarily formed on both.
In general, since the connecting bracket 50 is thicker than the upper rail 42, the upper rail 42 may be hardly affected by heat by laser welding to a position slightly approaching the connecting bracket 50 at the contact portions. it can. At this time, the welding mark 60 is greatly formed on the connection bracket 50.

  In the above-described embodiment, a vehicle seat used for an automobile has been described as a specific example. can do.

In the present embodiment, the vehicle seat according to the present invention has been mainly described.
However, said embodiment is only an example for making an understanding of this invention easy, and does not limit this invention. The present invention can be changed and improved without departing from the gist thereof, and the present invention includes the equivalents thereof.

DESCRIPTION OF SYMBOLS S Vehicle seat 1 Seat cushion 1a, 2a Cushion pad 1b, 2b Skin material 2 Seat back 10 Cushion frame 11 Side frame 12 Pan frame 13 Back connection frame 14 Elastic spring 20 Reclining device 21 Back rotating shaft 22 Spiral spring 30 Height link device 31 First link 32 Second link 33 Brake rotation shaft 34 Brake unit 35 Height operation lever 40 Rail device 41 Lower rail 42 Upper rail 43 Rail operation lever 50 Connection bracket 51 Bottom wall (contact portion)
51a Notch 52 Side wall part 52a Upper end flange 52b Harness passage hole 53 Front wall part 54 Reinforcement wall part 54a Reinforcement convex part 60 Weld mark 61 First weld part 62 Second weld part

Claims (9)

A seat cushion as a seating part;
A lower rail mounted on the vehicle body floor and extending in a predetermined direction; an upper rail that is slidably mounted along the lower rail and supports the seat cushion;
A connection bracket mounted on the upper rail to connect the upper rail and the seat cushion;
The connection bracket has a contact portion that contacts a contacted portion provided on the upper rail,
By welding the outer peripheral part of the part where the contact part and the contacted part are in contact, a welding mark is formed on at least one of the contact part and the contacted part,
The welding mark extends along the outer peripheral portion. The abutting portion abuts against the abutted portion in the vertical direction,
2. The vehicle seat according to claim 1, wherein the connection bracket is mounted on the upper rail by laser welding of the outer peripheral portion from at least one side in the seat width direction.   The welding mark includes a first welded portion extending along an outer side surface in the sheet width direction and a second welded portion extending along an inner side surface in the sheet width direction in the outer peripheral portion. The vehicular seat according to claim 1 or 2 characterized by things. A cutout is formed in a part of the outer peripheral portion in the contact portion,
The vehicle seat according to any one of claims 1 to 3, wherein the welding mark extends along the outer peripheral portion including the notch. The connecting bracket includes a bottom wall portion that contacts the upper surface of the upper rail, and a side wall portion that extends continuously upward from an inner portion of the bottom wall portion in the seat width direction and to which the seat cushion side is attached. ,
The vehicle seat according to claim 4, wherein the notch is formed in an outer portion of the bottom wall portion in a seat width direction. The seat cushion and the connection bracket are connected to each other, and provided with a first link and a second link attached so as to be rotatable with respect to the connection bracket,
The vehicle seat according to claim 5, wherein the first link is disposed in front of the seat with respect to the second link, and is disposed at a position different from the second link in the seat width direction. .   The vehicle seat according to claim 6, wherein a plurality of the notches are formed between the first link and the second link in the seat front-rear direction. The side wall portion is formed by being bent in a direction away from the bottom wall portion in the seat width direction from the portion to which the first link is attached to the portion to which the second link is attached.
The connecting bracket connects the bottom wall portion and a portion to which the second link is attached in the side wall portion, and has a reinforcing wall portion extending upward from the bottom wall portion toward the side wall portion. The vehicle seat according to claim 7. The reinforcing wall portion is inclined upward from the bottom wall portion toward the side wall portion,
The reinforcing wall portion is formed with a reinforcing convex portion that protrudes upward and extends from a portion continuous to the bottom wall portion to a portion continuous to the side wall portion. The vehicle seat as described.

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