JP2020117227A - Vehicle seat - Google Patents

Abstract

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 including a rail device that supports a seat body so as to be movable in the seat front-rear direction.

Conventionally, in a vehicle seat provided with a rail device for movably supporting a seat body in a seat front-rear direction with respect to a vehicle body floor, a substantially L-shaped connecting bracket is used to connect the seat body and the rail device. Has been.
The connection bracket is generally attached to the upper rail upper surface of the rail device by using bolts, rivets, etc., but a technique for newly joining by laser welding is known for the purpose of reducing the number of parts and reducing the weight of the seat. (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 of being in contact with each other in the vertical direction. ..
Then, while ensuring the joint strength by laser welding, the welding location is taken into consideration in order to simplify the welding work, and the welding bead (welding mark) formed by laser welding has a predetermined shape on the upper surface of the connecting bracket. It extends like an eggplant.

JP, 2009-202814, A JP, 2013-107558, A

However, in Patent Documents 1 and 2, by irradiating a laser beam from directly above the connecting bracket to the connecting bracket and the upper rail, a part of the connecting bracket is mainly melted and joined to the upper rail. There is a possibility that the welding strength may be reduced as compared with the case where the portion where the upper rail is in contact with is directly irradiated with the laser beam.
In addition, since the connecting bracket is generally thicker than the upper rail, there is a risk that the welding strength will decrease if laser welding is performed from directly above the connecting bracket, and it is necessary to increase the irradiation intensity of the laser and it will be affected by heat. There was a fear that it would be easier.
Therefore, there has been a demand for a technique capable of further improving the joining strength by laser welding and facilitating the welding work.

Further, among the above-mentioned vehicle seats, there are those further provided with a height link device and a reclining device for supporting the seat body so that the seat body can be moved up and down. It was necessary to carry out the assembly work including.

The present invention has been made in view of the above problems, and an object of the present invention is to improve the joint strength by welding of component parts and for a vehicle with a rail device that can facilitate welding work. To provide a seat.
Further, another object of the present invention is to provide a vehicle seat with a rail device capable of performing an assembling work including a welding work in consideration of a positional relationship with components such as a height link device. is there.

According to the vehicle seat of the present invention, the above-mentioned problem is achieved by a seat cushion that is a seating portion, a lower rail that is mounted on a vehicle body floor, extends in a predetermined direction, and is slidably mounted along the lower rail. An upper rail that supports the cushion, and a connecting bracket that is mounted on the upper rail to connect the upper rail and the seat cushion are provided, the connecting bracket contacting an abutted portion provided on the upper rail. Having a contact portion, by welding the outer peripheral portion of the contact portion and the contacted portion abutted, a welding mark is formed on at least one of the contact portion and the contacted portion, The welding mark is solved by extending along the outer peripheral portion.

As described above, since the outer rail portion of the contacted portion of the upper rail and the contact portion of the connecting bracket are welded, the upper rail and the connecting bracket are in contact with each other compared to the conventional example. Since the portions can be directly welded, the joint strength by welding can be improved.
Further, since the welding marks formed by welding extend along the outer peripheral portion of the portions in contact with each other, the welding strength can be further improved.

At this time, the abutting portion abuts on the abutted portion in the vertical direction, and the connecting bracket is laser-welded on the outer peripheral portion from at least one side in the seat width direction. It is good to be attached to.
As described above, the laser welding is performed from the outer side or the inner side in the sheet width direction, so that the welding work can be performed from a position where a space can be relatively easily secured.
Further, by selecting laser welding among various welding methods, the welding work can be performed more easily.

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

At this time, a cutout may be formed in a part of the outer peripheral portion of the contact portion, and the welding trace may extend along the outer peripheral portion including the cutout.
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 is a bottom wall portion that abuts the upper surface of the upper rail, and 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. It is preferable that the notch is formed in an outer portion of the bottom wall portion in the seat width direction.
With the above configuration, when forming the notch in the outer peripheral portion of the bottom wall portion, the notch can be provided 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 connecting bracket are respectively connected to each other, and a first link and a second link are attached so as to be rotatable with respect to the connecting bracket, and the first link is the second link. It is better to be arranged on the front side of the seat, and at a position different from the second link in the seat width direction.
Generally, in a vehicle seat provided with a height link device, it is necessary to design so that the height operation lever does not extend as much as possible from the seat body to the outside in the seat width direction. For example, the height operation lever faces the height operation lever. A technique is known in which the second link (driving link) in the position is offset inward with respect to the first link.
Then, by offsetting the links, the joint strength of the connecting bracket is required to be higher than usual. With the above configuration, the joint strength of the connecting bracket can be sufficiently ensured.

At this time, a plurality of the notches may be formed between the first link and the second link in the seat front-rear direction.
As described above, since the notch is formed at a position avoiding the components such as the link, the work of welding toward the notch becomes easy.

At this time, the side wall portion is formed to bend away from the bottom wall portion in the seat width direction from the portion where the first link is attached to the portion where the second link is attached. The bracket may include a reinforcing wall portion that connects the bottom wall portion and a portion of the side wall portion to which the second link is attached and extends upward from the bottom wall portion toward the side wall portion. ..
With the above configuration, the rigidity around the second link can be increased by providing the reinforcing wall portion even when the second link is offset inward with respect to the first link in consideration of the layout relationship of the height link device. ..
Further, when the second link is offset as described above, when 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 inside in the seat width direction, the portion of the connecting bracket that extends toward the second link is an obstacle. As a result, it becomes difficult to properly irradiate the outer peripheral portion with laser. However, according to the above configuration of the present invention, since the reinforcing wall portion extends upward from the bottom wall portion toward the side wall portion, it is possible to avoid a position that interferes with laser irradiation.
More specifically, in general, when the laser irradiates the target part, part of it will bounce off and become a reflection laser, so it is necessary to avoid arranging components in the area where the reflection laser passes. With the structure of the connecting bracket, the work of laser welding can be suitably performed.

At this time, the reinforcing wall portion is inclined upward from the bottom wall portion toward the side wall portion, and the reinforcing wall portion protrudes upward and extends from the portion continuous with the bottom wall portion to the side wall portion. 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, the laser welding work can be performed more suitably by considering the reflection angle of the laser, for example.
Further, since the reinforcing protrusion is formed, the rigidity around the second link can be further enhanced.

According to the invention of claim 1, as compared with the conventional example, the portion where the upper rail and the connecting bracket are in contact with each other can be directly welded, so that the joint strength by welding can be improved. Further, since the welding marks extend 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, the laser welding is performed from the outer side or the inner side in the sheet width direction, so that the welding work can be easily performed from a position where a space can be easily secured.
According to the invention of claim 3, the joint strength of the connecting bracket can be further improved, and in particular, the stress applied in the seat width direction can be efficiently received.

According to the invention of claim 4, since the outer peripheral portion that can be welded can be extended by the notch, the welding strength is improved and the degree of freedom of the welding position is increased.
According to the fifth aspect of the present invention, the notch is formed at a position where the laser welding operation is facilitated while avoiding the position of the side wall portion on the outer peripheral portion of the bottom wall portion.
According to the invention of claim 6, the joint strength of the connecting bracket is generally required by offsetting the links from each other, but the joint strength of the connecting bracket can be sufficiently secured.

According to the invention of claim 7, the work of welding toward the notch becomes easy.
According to the invention of claim 8, the rigidity around the second link can be enhanced even when the second link is offset with respect to the first link in consideration of the layout relationship of the height link device. Further, even when the second link is offset as described above, the laser welding work can be preferably performed.
According to the invention of claim 9, for example, the laser welding work can be more suitably performed in consideration of the reflection angle of the laser. Further, the rigidity around the second link can be further enhanced.

It is a perspective view of the vehicle seat concerning this embodiment. FIG. 3 is a perspective view of a seat frame that serves as a skeleton of a vehicle seat. FIG. 3 is an enlarged view of a main part of FIG. 2, showing a connecting bracket for connecting the seat cushion and the rail device. It is a front view explaining the state where the connecting bracket was attached to the rail device (upper rail). FIG. 5 is a cross-sectional view taken along line VV of FIG. 3, illustrating a state in which laser welding is performed from the outer side and the inner side in the sheet width direction. FIG. 6 is a cross-sectional view taken along line VI-VI of FIG. 3, illustrating a state in which laser welding is performed from the outer side and the inner side in the sheet width direction.

Hereinafter, a vehicle seat according to an embodiment of the present invention will be described with reference to FIGS. 1 to 6.
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 connecting bracket for connecting a cushion frame and an upper rail, and the connecting bracket and the upper rail abut vertically. Laser welding is performed on the outer peripheral portion of the formed portion from both sides in the sheet width direction to form a welding mark, and the welding mark is formed on the outer peripheral portion of the first welding portion extending along the outer side surface in the sheet width direction. And a second welded portion extending along the inner side surface in the seat width direction, the present invention relates to an invention of a vehicle seat.
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, the vehicle seat S according to the present embodiment includes a seat body including a seat cushion 1 and a seat back 2, and, as shown in FIG. A reclining device 20 that rotatably connects the seat body, a height link device 30 that connects the seat body to the vehicle body floor so that the seat body can move up and down, and a rail device 40 that is attached to the vehicle body floor and that supports the seat body so that the seat body can move back and forth. It is mainly composed of.

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

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

As shown in FIG. 2, the reclining device 20 is switchable between a locked state in which the rotational movement of the seat back 2 is locked and an unlocked state, and from the state in which the seat back 2 is locked in an upright posture, This is a device that can release the locked state by operating a Lycra operating lever (not shown) and adjust the standing posture of the seat back 2.
More specifically, the reclining device 20 is attached to the rear portion of the seat cushion 1 and urges the back rotation shaft 21 which is the center of rotation and the seat back 2 to rotate forward around the back rotation shaft 21. The spiral spring 22 is mainly included.
The back rotation shaft 21 is axially 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 to the seat cushion 1 side and the other end is seated on the seat back 2 side. 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 the left and right first links 31 arranged on the seat front side and the seat rear side are arranged. The second link 32 serves as a drive link, and the height of the seat body can be adjusted.
In addition, a sector gear portion (not shown) is formed as a gear on a part of the outer peripheral portion of the connecting portion of the second link 32 on the cushion frame 10 (side frame 11) side. It is meshed with a pinion gear (not shown) provided on the inside of the left and right of 34.

Further, the height link device 30 is pivotally supported on the side surface of the side frame 11 in the seat width direction, and is rotatably attached to the brake rotation shaft 33 protruding outward and the brake rotation shaft 33 so that the seat main body can be lifted and lowered. 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 up and down the seat body are provided.
When the height operating 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 left side second link 32 on which the sector gear portion is formed rotates, and the right side second link 32 and the left and right first links 31 also rotate following the left side second link 32. 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 includes left and right lower rails 41 fixed to the vehicle body floor and extending in the seat front-rear direction, and left and right upper rails 42 slidably supported along the lower rails 41. It is mainly composed of a lock member (not shown) that locks the upper rail 42 in a non-sliding manner, and a rail operation lever 43 that releases the locked state of the lock member.
The lower rails 41 are formed of a long hollow body, are arranged on the left and right sides at intervals in the seat width direction, and form a storage space having a substantially convex cross-section along the seat front-rear direction.
The upper rail 42 is an elongated body that slides along the lower rail 41 in a state where it is inserted into the accommodation space of the lower rail 41. As shown in FIG. It is connected to the side.

As shown in FIGS. 3 and 4, the connecting bracket 50 is formed of a sheet metal member having a substantially L-shaped vertical cross section that extends in the seat front-rear direction, and includes the upper rail 42 and the links 31 on the cushion frame 10 side in the vertical direction. It is a member for connecting with 32.
The connecting bracket 50 continuously extends upward from the bottom wall portion 51 that abuts 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. It is mainly composed of a side wall portion 52 and a front wall portion 53 that extends continuously upward from the front end portion of the bottom wall portion 51 and is also connected to the front end portion of the side wall portion 52.
The bottom wall portion 51 corresponds to the 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 has a notch 51a that is provided on the outer surface in the seat width direction at a predetermined interval and is cut out toward the inner side in the seat width direction. Are formed in plural.
The notch 51a is a portion that is cut out in a substantially rectangular shape, and extends inward in the seat width direction within a range that does not reach the central portion of the upper rail 42 in the seat width direction. Further, it is arranged between the first link 31 and the second link 32 in the seat front-rear direction.
The bottom wall portion 51 is joined onto the upper rail 42 by laser welding 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 outer side and the inner side in the seat width direction, so that welding marks 60 are 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 to the portion where the second link 32 is attached. It is formed by bending in the direction.
In addition, in the side wall portion 52, between the first link 31 and the second link 32, an upper end flange 52a extending in the seat front-rear direction and a harness for a known device in 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 in a portion where the bottom wall portion 51 and the side wall portion 52 where the second link 32 is attached are connected.
The reinforcing wall portion 54 is inclined upward from the bottom wall portion 51 toward the side wall portion 52, and specifically, at an angle of about 15 to 45 degrees with respect to the bottom wall portion, preferably at an angle of about 30 degrees. Inclined upward.
Further, the reinforcing wall portion 54 is formed with a reinforcing convex portion 54a that is bulged upward. The reinforcing protrusions 54a extend from the portion of the reinforcing wall portion 54 connected to the bottom wall portion 51 to the portion of the reinforcing wall portion 54 connected to the side wall portion 52, and are formed in plural 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 51 and the upper surface of the upper rail 42 are in contact with each other.
The welding trace 60 includes a first weld portion 61 extending along the outer side surface in the seat width direction and a second weld portion 62 extending along the inner side surface in the seat width direction in the outer peripheral portion. I have it.
The first welded portion 61 extends along the outer side surface including the cutout 51a in the outer peripheral portion of the bottom wall portion 51, and more specifically, extends so as to be discontinuous at the position of the cutout 51a. ..
The second welded portion 62 continuously extends along the inner side surface of the outer peripheral portion of the bottom wall portion 51.

In the above configuration, the first welded portion 61 and the second welded portion 62 are formed by laser welding from the outside and the inside in the seat width direction, respectively.
Therefore, welding work can be performed from a position where a space can be relatively easily secured.

Further, in the above-described configuration, as shown in FIGS. 3 and 4, the second link 32 is arranged inside the seat width direction with respect to the first link 31 with a different position (offset arrangement).
Generally, 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 as to prevent the height operation lever 35 from protruding outward from the seat body in the seat width direction as much as possible. The two links 32 (driving links) are arranged offset inside the seat width direction.
By arranging the links offset with each other in this way, the joint strength of the connecting bracket 50 is required to be higher than usual, but with this configuration employing laser welding as described above, the joint strength of the connecting bracket 50 is sufficiently secured. can do.

Further, in the above-described configuration, the reinforcing wall portion 54 having an inclined shape is formed in the connecting bracket 50 as a chamfered portion, corresponding to the offset arrangement of the second link 32.
Generally, when laser welding is attempted from the inside in the seat width direction, the portion of the connecting bracket 50 that projects toward the second link 32 is an obstacle and it becomes difficult to properly perform laser irradiation. However, with the configuration of the present invention, it is possible to avoid a portion that interferes with the laser irradiation by the reinforcing wall portion 54.
Specifically, when the laser irradiates the target part, part of it will bounce off as a reflection laser, so it is necessary to avoid arranging components in the area where the reflection laser passes. With the structure of the connecting bracket 50, the laser welding work can be preferably performed.

<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 it is not always necessary, and the cushion frame 10 (side frame 11) and the connecting bracket 50 are not necessarily required. It may be directly connected.
Further, instead of the connecting bracket 50, a connecting portion may be integrally provided at the lower end portion of the side frame 11, and the connecting portion and the upper rail 42 may be connected.

In the above embodiment, the connecting bracket 50 is laser-welded to be mounted on the upper rail, but the welding method is not limited to laser welding, and various welding methods such as arc welding and spot welding are adopted. Is also good.

In the above-described embodiment, as shown in FIG. 3, the connecting bracket 50 is joined to 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 outer side in the seat width direction, or may be laser welded only from the seat front side.
When the outer peripheral portion is laser-welded only from the outside in the sheet width direction, the welding mark 60 is formed only in the first welding portion 61.
At this time, the welding location of the first welded portion 61 is also arbitrary, and for example, when the notch 51a is not formed, the first welded portion 61 continuously extends along the outer surface of the outer peripheral portion. It may be extended or may be extended discontinuously with a gap. Further, for example, even when the cutout 51a is formed, the first welded portion 61 may continuously extend along the outer side surface including the entire circumference of the cutout 51a.

In the above-described embodiment, as shown in FIG. 3, the outer peripheral portion of the portion where the connecting bracket 50 and the upper rail 42 are in contact with each other is laser-welded, so that the welding mark 60 is formed on both the connecting bracket 50 and the upper rail 42. However, the welding marks 60 do not necessarily have to be formed on both sides.
In general, since the connecting bracket 50 has a larger plate thickness than the upper rail 42, the upper rail 42 is less likely to be affected by heat by laser welding at a position slightly abutted to the connecting bracket 50 side in a portion where they are in contact with each other. it can. At this time, the welding mark 60 is largely formed on the connecting bracket 50.

In the above embodiment, the vehicle seat used for the automobile has been described as a specific example, but the present invention is not limited to this, and is also used as a vehicle seat for trains, buses, etc., and as a vehicle seat for airplanes, ships, etc. can do.

In this embodiment, the vehicle seat according to the present invention has been mainly described.
However, the above embodiment is merely an example for facilitating the understanding of the present invention, and does not limit the present invention. The present invention can be modified and improved without departing from the spirit of the invention, and it goes without saying that the present invention includes equivalents thereof.

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 Rear connection frame 14 Elastic spring 20 Reclining device 21 Back rotation shaft 22 Swirl spring 30 Height link device 31 1st link 32 2nd link 33 Brake rotating shaft 34 Brake unit 35 Height operating lever 40 Rail device 41 Lower rail 42 Upper rail 43 Rail operating lever 50 Connecting bracket 51 Bottom wall part (contact part)
51a Notch 52 Side wall 52a Upper end flange 52b Harness passage hole 53 Front wall 54 Reinforcing wall 54a Reinforcing protrusion 60 Welding trace 61 First welding 62 Second welding

Claims (9)

A seat cushion that serves as a seating part,
A lower rail that is mounted on the floor of the vehicle body and extends in a predetermined direction; and an upper rail that is slidably mounted along the lower rail and that supports the seat cushion,
A connecting bracket mounted on the upper rail for connecting the upper rail and the seat cushion,
The connecting bracket has an abutting portion that abuts an abutted portion provided on the upper rail,
By welding the outer peripheral portion of the portion where the contact portion and the contacted portion are in contact with each other, a welding mark is formed in at least one of the contact portion and the contacted portion,
The vehicle seat, wherein the welding mark extends along the outer peripheral portion. The abutting portion abuts against the abutted portion in the vertical direction,
The vehicle seat according to claim 1, wherein the connecting bracket is mounted on the upper rail by laser welding the outer peripheral portion from at least one side in the seat width direction. The welding trace includes a first weld portion extending along an outer side surface in the seat width direction and a second weld portion extending along an inner side surface in the seat width direction of the outer peripheral portion. The vehicle seat according to claim 1 or 2, characterized in that: A notch is formed in a part of the outer peripheral portion of 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 cutout. The connecting bracket has a bottom wall portion that abuts on an upper surface of the upper rail, and 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 vehicle seat according to claim 4, wherein the notch is formed in an outer portion of the bottom wall portion in the seat width direction. The seat cushion and the connecting bracket are connected to each other, and a first link and a second link are attached so as to be rotatable with respect to the connecting bracket,
The vehicle seat according to claim 5, wherein the first link is arranged in front of the seat with respect to the second link, and is arranged at a position different from the second link in a 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 bending in a direction away from the bottom wall portion in the seat width direction from a portion where the first link is attached to a portion where the second link is attached,
The connection bracket has a reinforcing wall portion that connects the bottom wall portion and a portion of the side wall portion to which the second link is attached and extends upward from the bottom wall portion toward the side wall portion. The vehicle seat according to claim 7, wherein: The reinforcing wall portion is inclined upward from the bottom wall portion toward the side wall portion,
9. The reinforcing wall portion is formed with a reinforcing protrusion protruding upward and extending from a portion continuous with the bottom wall portion to a portion continuous with the side wall portion. The vehicle seat described.