JP2025012940A - Riser bracket and vehicle seat frame - Google Patents

Abstract

To inhibit deformation of a riser bracket caused by luggage colliding with a seat back during a vehicle collision.SOLUTION: An inner riser bracket 30L includes a riser bracket body 40. The riser bracket body 40 has a lower wall part 42, a vertical wall part 44, and an upper wall part 46. The lower wall part 42 is disposed spaced apart from an inner slide rail 14L in an upward direction at the front side of a step part 42C formed in front of a rear rail fixing part 42A. The vertical wall part 44 has: a recliner bracket fixing part 44A to which a recliner bracket 64 is fastened; and a buckle connection part 44B with which a buckle 76 is connected. At least a rear part of the upper wall part 46 extends in a flat form in a front-back direction.SELECTED DRAWING: Figure 3

Description

The present invention relates to a frame for a vehicle seat, and in particular to a riser bracket.

In the rear seat device for a passenger and freight vehicle disclosed in Patent Document 1 below, a lower arm (riser bracket) is fixed to the upper surface of a slide rail that is fixed to the floor surface of the vehicle. An upward protrusion that protrudes toward the upper side of the vehicle is provided at the rear end of the riser bracket, and a first upper arm (recliner bracket) is fixed to the upward protrusion. A second upper arm is connected to the recliner bracket via a reclining mechanism, and a seat back is fixed to the second upper arm.

Japanese Utility Model Application Publication No. 5-22165

In the above prior art, when luggage placed in the luggage compartment behind the seat back of the vehicle collides with the seat back during a vehicle collision, stress is concentrated on the riser bracket at the vehicle front side of the upward protrusion of the riser bracket, causing significant deformation of the riser bracket in that area. As a result, the seat back is displaced toward the vehicle front by a large amount. In particular, when the reclining mechanism is mounted on only one side of the seat back in the vehicle width direction, the seat back is displaced toward the vehicle front by a large amount.

In consideration of the above, the present invention aims to provide a riser bracket that can suppress deformation caused by the collision of luggage with a seat back during a vehicle collision, and a vehicle seat frame equipped with the riser bracket.

The riser bracket of the first aspect is fixed to a slide rail attached to the floor of the vehicle and includes a riser bracket body having a recliner bracket fixed to the rear end thereof, to which a seat back frame is connected via a reclining mechanism. The riser bracket body has a rail fixing part fastened to the upper surface of the slide rail at the rear, a step part formed on the seat front side of the rail fixing part, a lower wall part disposed on the seat front side of the step part away from the slide rail toward the upper side of the seat, a vertical wall part extending from the outer end of the lower wall part in the seat width direction toward the upper side of the seat, a recliner bracket fixing part to which the recliner bracket is fastened is provided at the rear end, and a buckle connecting part to which the buckle of the seat belt device is connected is provided on the seat front side of the recliner bracket fixing part, and an upper wall part extending from the upper end of the vertical wall part toward the inside of the seat width direction and extending flat in the seat front-rear direction.

In the first embodiment of the riser bracket, the riser bracket body is fixed to a slide rail attached to the floor of the vehicle. The seat back frame is connected to the recliner bracket, which is fixed to the rear end of the riser bracket body, via a reclining mechanism.

The riser bracket main body has a lower wall, a vertical wall, and an upper wall. A rail fixing portion that is fastened to the upper surface of the slide rail is provided at the rear of the lower wall. A step is formed in the lower wall on the seat front side of this rail fixing portion, and the lower wall is disposed above the seat from the slide rail on the seat front side of the step. The vertical wall extends upward from the outer end of the lower wall in the seat width direction, and a recliner bracket fixing portion to which the recliner bracket is fastened is provided at the rear end of the vertical wall. A buckle connecting portion to which the buckle of the seat belt device is connected is provided on the vertical wall on the seat front side of the recliner bracket fixing portion. The upper wall extends inward in the seat width direction from the upper end of the vertical wall, and at least the rear portion extends flat in the seat front-rear direction.

For example, if luggage placed in the luggage compartment behind the seat back collides with the seat back during a vehicle collision, the step prevents the vertical wall from collapsing in the seat width direction. Furthermore, because at least the rear part of the upper wall of the riser bracket body extends flat in the front-to-rear direction of the seat, stress concentration is less likely to occur at the upper part of the riser bracket body. As a result, deformation of the riser bracket body can be suppressed.

The second aspect of the riser bracket is the first aspect, in which a buckle recess is provided in the vertical wall on the seat front side of the buckle connection part, recessed inward in the seat width direction.

According to the second aspect of the riser bracket, a buckle recess is provided on the vertical wall of the riser bracket body, recessed inward in the seat width direction on the seat front side of the buckle connection part. This buckle recess makes it easier to secure the buckle placement space in the seat width direction. As a result, for example, there is no need to form a step portion at the rear of the upper part of the riser bracket body in order to secure the above-mentioned placement space. This makes it easier to both suppress deformation of the riser bracket body and secure the placement space for the buckle.

The riser bracket of the third aspect is the first or second aspect, and includes a reinforcing patch fixed to the rear of the riser bracket body, and the reinforcing patch has a patch body portion that is overlapped from the inside in the seat width direction with respect to a portion of the vertical wall portion that includes the recliner bracket fixing portion and the buckle connection portion.

According to the third aspect of the riser bracket, a reinforcing patch is fixed to the rear of the riser bracket body. This reinforcing patch suppresses deformation of the vertical wall of the riser bracket body, so deformation of the riser bracket body can be further suppressed.

In the fourth aspect of the riser bracket, in the first or second aspect, the reinforcing patch has a lower flange portion that extends from the lower end of the patch body portion toward the inside in the seat width direction and is overlapped from above the seat with respect to the portion of the lower wall portion that includes the rail fixing portion.

In the fourth aspect of the riser bracket, the lower flange of the reinforcing patch reinforces the portion of the riser bracket body that includes the rail fixing portion, which prevents stress from concentrating around the fastening portion with the slide rail in the rail fixing portion. As a result, deformation of the riser bracket body can be further suppressed.

The fifth aspect of the riser bracket is the third aspect, in which the reinforcing patch has a bead portion formed across the patch body portion and the lower flange portion.

In the fifth aspect of the riser bracket, the bead portion of the reinforcing patch prevents the patch body from collapsing in the vehicle width direction relative to the lower flange portion, so the reinforcing patch can effectively prevent the vertical wall portion of the riser bracket body from collapsing in the vehicle width direction.

The sixth aspect of the riser bracket is any one of the first to fourth aspects, in which the reinforcing patch extends from the upper end of the patch body toward the inside in the seat width direction and has an upper flange portion that contacts or faces the upper wall portion from the lower side of the seat.

In the sixth aspect of the riser bracket, the upper wall of the riser bracket body is reinforced by the upper flange portion of the reinforcing patch, which further suppresses deformation of the riser bracket body.

The seventh aspect of the riser bracket is any one of the first to fifth aspects, in which the reinforcing patch extends forward of the seat from the step portion.

In the seventh aspect of the riser bracket, the reinforcing patch extends further forward than the step formed in the lower wall of the riser bracket body, preventing stress from concentrating around the step in the lower wall. As a result, deformation of the riser bracket body can be further suppressed.

The eighth aspect of the vehicle seat frame includes a slide rail attached to the floor of the vehicle, a riser bracket of any one of the first to sixth aspects in which the riser bracket body is fixed to the slide rail, a recliner bracket fixed to the rear end of the riser bracket body, and a seat back frame connected to the recliner bracket via a reclining mechanism.

In the vehicle seat frame of the eighth aspect, a slide rail is attached to the floor of the vehicle, and a riser bracket body is fixed to the slide rail. A recliner bracket is fixed to the rear end of the riser bracket body. The seat back frame is connected to the recliner bracket via a reclining mechanism. The riser bracket body is that of any one of the riser brackets of the first to sixth aspects, and therefore the above-mentioned effects are obtained.

As described above, the present invention makes it possible to suppress deformation of the riser bracket caused by the collision of luggage with the seat back during a vehicle collision.

1 is a side view showing a vehicle seat frame according to an embodiment of the present invention; 1 is a perspective view showing a portion of a vehicle seat frame according to an embodiment of the present invention; 2 is a perspective view showing a riser bracket main body and a reinforcing patch provided on the vehicle seat frame according to the embodiment. FIG. 4 is a cross-sectional view showing a cut surface along line F4-F4 in FIG. 3. FIG. 2 is a first perspective view showing a riser bracket body. FIG. 4 is a second perspective view showing the riser bracket body. FIG. 2 is a first perspective view showing a reinforcing patch. FIG. 2 is a second perspective view showing the reinforcing patch. FIG. 4 is a perspective view showing a portion of a vehicle seat frame according to a comparative example. FIG. 11 is a side view showing a portion of a vehicle seat frame according to a comparative example, illustrating a state in which luggage collides against the seat back from the rear side of the vehicle.

Below, a vehicle seat frame 10 according to one embodiment of the present invention will be described with reference to Figs. 1 to 8. Note that in each figure, some reference numerals may be omitted in order to make the drawings easier to read. Arrows FR, LH, and UP, which are appropriately depicted in each figure, indicate the front, left, and top of the vehicle seat frame 10, respectively. The front-rear, left-right, top-bottom directions of this vehicle seat frame 10 match the front-rear, left-right, top-bottom directions of a vehicle (not shown) in which this vehicle seat frame 10 is mounted.

As shown in Figures 1 and 2, the vehicle seat frame 10 according to this embodiment includes a seat slide mechanism 12, left and right riser brackets 30L, 30R, front and rear pipe frames 60, 62, a recliner bracket 64, a reclining mechanism 66, and a seatback frame 70. This vehicle seat frame 10 forms the framework of the rear seat located on the right side of the passenger compartment, and is located in front of the luggage compartment.

The seat slide mechanism 12 has left and right slide rails 14L, 14R attached to the floor of the vehicle. Each of the left and right slide rails 14L, 14R has a lower rail 16 fixed to the floor of the vehicle and an upper rail 18 supported so as to be slidable in the front-rear direction relative to the lower rail 16. Each upper rail 18 is configured to be locked from sliding relative to each lower rail 16 by a lock mechanism 20 provided in the seat slide mechanism 12.

1 and 2, the locking mechanism 20 has an operating lever 22 that spans between the left and right upper rails 18, and left and right operating force transmission parts 24 (the right operating force transmission part 24 is not shown) that transmit the operating force of the operating lever 22 to a locking member (not shown) provided inside each upper rail 18 and are provided in the center of the front-rear direction on the top surface of each upper rail 18. This locking mechanism 20 is configured so that the upper rails 18 are allowed to slide relative to each lower rail 16 when the operating lever 22 is lifted upward.

The left and right riser brackets 30L, 30R are disposed above the left and right slide rails 14L, 14R, respectively. The left and right riser brackets 30L, 30R constitute the left and right side frames, which are part of the seat cushion frame that constitutes the framework of the seat cushion. Hereinafter, the right side (here, the outer side in the vehicle width direction) slide rail 14R will be referred to as the "outer slide rail 14R", the left side (here, the inner side in the vehicle width direction) slide rail 14L will be referred to as the "inner slide rail 14L", the right side riser bracket 30R will be referred to as the "outer riser bracket 30R", and the left side riser bracket 30L will be referred to as the "inner riser bracket 30L". The inner slide rail 14L corresponds to the "slide rail" in this invention, and the inner riser bracket 30L corresponds to the "riser bracket" in this invention.

The outer riser bracket 30R is made of, for example, a press-formed metal plate, and has an elongated shape with the longitudinal direction being the longitudinal direction. The outer riser bracket 30R is formed to be longer than the upper rail 18 of the outer slide rail 14R. The outer riser bracket 30R has a lower wall portion (not shown) fixed to the upper surface of the upper rail 18 of the outer slide rail 14R, a vertical wall portion 32 extending upward from the right end portion (outer end portion in the vehicle width direction; outer end portion in the seat width direction) of the lower wall portion, and an upper wall portion 34 extending leftward (inner side in the vehicle width direction; inner side in the seat width direction) from the upper end portion of the vertical wall portion 32. A step portion 36 is formed at the front portion of the outer riser bracket 30R by expanding the height dimension of the outer riser bracket 30R in a stepped shape. A seat back connection portion 38 extending upward is formed at the rear end portion of the outer riser bracket 30R.

As shown in Figures 2 to 4, the inner riser bracket 30L is composed of a riser bracket body 40 and a reinforcing patch 50. The riser bracket body 40 and the reinforcing patch 50 are composed of, for example, press-formed metal plates. The riser bracket body is elongated in the front-to-rear direction and is longer than the upper rail 18 of the inner slide rail 14L. A recliner bracket 64 is fixed to the rear end of the riser bracket body 40. A seat back frame 70 is connected to the recliner bracket 64 via a reclining mechanism 66. The seat back frame 70 forms the framework of the seat back and includes left and right side frames 72L, 72R.

The recliner bracket 64 and the left and right side frames 72L, 72R are made of, for example, press-formed metal plates, and are arranged with the plate thickness direction in the left-right direction. The lower end of the right side frame 72R is overlapped with the upper end of the seat back connection part 38 of the outer riser bracket 30R from the inside in the vehicle width direction, and is rotatably connected to the seat back connection part 38 via a connecting shaft 74 whose axis direction is the left-right direction.

The lower end of the left side frame 72L is positioned outside the upper part of the recliner bracket 64 in the vehicle width direction. A recliner 68, which constitutes the main part of the reclining mechanism 66, is positioned between the lower end of the left side frame 72L and the upper part of the recliner bracket 64, and the side frame 72L and the recliner bracket 64 are connected via the recliner 68. By unlocking the recliner 68, the seat back frame 70 can be reclined or tilted forward.

As shown in Figures 1 to 6, the riser bracket body 40 has a lower wall portion 42 fixed to the upper surface of the upper rail 18 of the inner slide rail 14L, a vertical wall portion 44 extending upward from the left end portion (inner end portion in the vehicle width direction; outer end portion in the seat width direction) of the lower wall portion 42, and an upper wall portion 46 extending rightward (outer side in the vehicle width direction; inner side in the seat width direction) from the upper end portion of the vertical wall portion 44. A step portion 48 is formed in the front portion of the riser bracket body 40, which expands the height dimension of the riser bracket body 40 in a stepped manner.

At the rear of the lower wall 42, a rear rail fixing portion 42A is provided that is fastened to the upper surface of the upper rail 18 of the inner slide rail 14L using two front and rear bolts B1 and two front and rear nuts N1. At the front end of the lower wall 42, a front rail fixing portion 42B is provided that is fastened to the upper surface of the upper rail 18 of the inner slide rail 14L using a bolt B2 and a nut N2. The rear rail fixing portion 42A corresponds to the "rail fixing portion" in the present invention. As shown in Figures 5 and 6, the lower wall 42 has two through holes H1 through which the two bolts B1 are inserted and a through hole H2 through which the bolt B2 is inserted.

A step portion 42C is formed on the lower wall portion 42 in front of the rear rail fixing portion 42A, and is bent in a generally crank-like shape when viewed from the left to right direction. This step portion 42C is provided in the center of the lower wall portion 42 in the front-to-rear direction. In addition, a step portion 42D is formed on the lower wall portion 42 in the rear of the front rail fixing portion 42B, and is bent in a generally crank-like shape when viewed from the left to right direction. This step portion 42D is provided at the front end portion of the lower wall portion 42. Between the step portion 42C and the step portion 42D, the lower wall portion 42 is disposed above and spaced apart from the upper rail 18 of the inner slide rail 14L, and the operating force transmission portion 24 is disposed between the lower wall portion 42 and the upper rail 18.

The vertical wall portion 44 has a generally constant height at the rear of the step 48 provided at the front of the riser bracket main body 40, and the height dimension is increased at the step 48. At the rear end of this vertical wall portion 44, a recliner bracket fixing portion 44A is provided to which the lower end of the recliner bracket 64 is fastened using two front and rear bolts B3 and two front and rear nuts N3. The lower end of the recliner bracket 64 is overlapped with the recliner bracket fixing portion 44A from the inside in the vehicle width direction.

A buckle connection portion 44B is provided on the vertical wall portion 44 forward of the recliner bracket fixing portion 44A, to which the buckle 76 of the seat belt device is connected using a bolt B4 and a nut N4. The buckle 76 is rotatable around the bolt B4. As shown in Figures 5 and 6, the vertical wall portion 44 is formed with a through hole H3 through which the two bolts B3 are inserted, a through hole H4 through which the bolt B4 is inserted, and an elongated hole H5 for limiting the rotation range of the buckle 76.

A buckle recess 44C is provided on the vertical wall 44 forward of the buckle connection portion 44B, recessed toward the outside in the vehicle width direction (inward in the seat width direction). The buckle recess 44C is located near the center of the vertical wall 44 in the front-to-rear direction and has a generally inverted triangular shape when viewed from the left to right direction. This buckle recess 44C is formed to prevent interference (contact) between the buckle 76 and the riser bracket main body 40 when the buckle 76 rotates forward around the bolt B4.

A front pipe frame 60 is suspended between the front end of the vertical wall portion 44 and the front end of the vertical wall portion 32 of the outer riser bracket 30R, and a rear pipe frame 62 is suspended between the rear end of the vertical wall portion 44 and the rear end of the vertical wall portion 32. Each pipe frame 60, 62 is inserted into the through holes H6, H7 formed in the vertical wall portion 32 and the through holes H8, H9 formed in the vertical wall portion 44 (see Figures 5 and 6), and is fixed to each vertical wall portion 32, 44 by means of welding or the like.

The upper wall 46 is formed flat in the portion (rear and front-rear middle) rear of the step 48 provided at the front of the riser bracket main body 40, and is bent in a generally crank-like shape when viewed in the left-right direction at the step 46A provided at the step 48. The rear and front-rear middle of the upper wall 46 are configured so that there is no step that changes the height dimension of the riser bracket main body 40 in a stepped shape like the step 46A described above, and the height dimension of the riser bracket main body 40 is set constant or approximately constant rear of the step 48. Note that the above "flat" does not have to be strictly flat.

The reinforcing patch 50 has a patch body 52 overlapped from the outside in the vehicle width direction (inside in the seat width direction) with respect to the vertical wall 44 of the riser bracket body 40, a lower flange 54 extending from the lower end of the patch body 52 outward in the vehicle width direction and overlapping from above with the lower wall 42 of the riser bracket body 40, and an upper flange 58 extending from the upper end of the patch body 52 outward in the vehicle width direction (inside in the seat width direction) and facing the upper wall 46 of the riser bracket body 40 in contact or close proximity from below. This reinforcing patch 50 is fixed to the riser bracket body 40 by, for example, arc welding.

The front end of the reinforcement patch 50 is located near the rear of the step 48 of the riser bracket body 40, and the rear end of the reinforcement patch 50 is located near the rear end of the riser bracket body 40. This reinforcement patch 50 mainly reinforces the rear of the riser bracket body 40, but in this embodiment, it extends forward of the vehicle beyond the step 42C of the lower wall 42.

The patch body 52 is overlapped from the inside in the seat width direction with respect to the portion of the vertical wall 44 that includes the recliner bracket fixing portion 44A, the buckle connecting portion 44B, and the portion where the buckle recess 44C is formed (the portion that bulges inward in the seat width direction), and extends forward beyond the step portion 42C. The patch body 52 has a recess 52A that is recessed inward in the seat width direction at the portion where the patch body 52 is overlapped from the outside in the vehicle width direction with respect to the portion where the buckle recess 44C is formed in the vertical wall 44. The patch body 52 has two through holes H10 through which the two bolts B3 described above are inserted, a through hole H11 through which the bolt B4 described above is inserted, an elongated hole H12 for limiting the rotation range of the buckle 76, and a through hole H13 through which the rear pipe frame 62 is inserted.

The lower flange portion 54 is overlapped from above against a portion of the lower wall portion 42 of the riser bracket main body 40 that includes the rear rail fixing portion 42A. This lower wall portion 42 has two through holes H14 through which the two bolts B1 described above are inserted. Between these through holes H14, a bead portion 56 is formed that bulges upward. This bead portion 56 has a roughly inverted U-shape when viewed from the left to right, and is formed across the lower flange portion 54 and the patch main body portion 52.

In the vehicle seat frame 10 configured as described above, the left and right slide rails 14L, 14R are attached to the floor of the vehicle. Of the left and right slide rails 14L, 14R, the inner slide rail 14L on the inside in the vehicle width direction is fixed to the riser bracket body 40 of the inner riser bracket 30L. A recliner bracket 64 is fixed to the rear end of the riser bracket body 40, and the seat back frame 70 is connected to the recliner bracket 64 via a reclining mechanism 66.

The riser bracket main body 40 has a lower wall portion 42, a vertical wall portion 44, and an upper wall portion 46. A rear rail fixing portion 42A is provided at the rear of the lower wall portion 42, which is fastened to the upper surface of the upper rail 18 of the inner slide rail 14L. A step portion 42C is formed in the lower wall portion 42 in front of the rear rail fixing portion 42A, and the lower wall portion 42 is disposed upwardly away from the upper rail 18 of the inner slide rail 14L in front of the step portion 42C.

The vertical wall portion 44 extends upward from the inner end portion in the vehicle width direction (outer end portion in the seat width direction) of the lower wall portion 42, and a recliner bracket fixing portion 44A to which the recliner bracket 64 is fastened is provided at the rear end of the vertical wall portion 44. A buckle connecting portion 44B to which a buckle 76 of a seat belt device is connected is provided on the vertical wall portion 44 forward of the recliner bracket fixing portion 44A. The upper wall portion 46 extends outward in the vehicle width direction (inward in the seat width direction) from the upper end of the vertical wall portion 44, and the rear portion and the middle portion in the front-rear direction extend flatly in the front-rear direction.

For example, if luggage placed in the luggage compartment behind the seat back collides with the seat back during a vehicle collision, the step 42C prevents the vertical wall 44 from collapsing in the vehicle width direction. Furthermore, since the rear and front-rear middle parts of the upper wall 46 of the riser bracket main body 40 extend flat in the front-rear direction, stress concentration does not occur on the riser bracket at the vehicle front side of the upper protrusion, as in the prior art described in the Background Art section, and stress concentration is unlikely to occur on the upper part of the riser bracket main body 40. As a result, it is possible to suppress deformation of the riser bracket main body 40, and the amount of displacement of the seat back frame 70 toward the front side can be reduced. Moreover, since the step 42C for securing the arrangement space of the operating force transmission unit 24 prevents the vertical wall 44 from collapsing, the configuration can be simplified compared to the case where a dedicated configuration for preventing the vertical wall 44 from collapsing is provided.

The above effects will be further explained using a comparative example shown in Figures 9 and 10. In Figures 9 and 10, the same reference numerals are used for the same components as in this embodiment. In this comparative example, a step 49 is formed at the rear of the riser bracket body 40', and the height dimension of the riser bracket body 40' is reduced in front of the step 49. This step 49 corresponds to the "upward protrusion" in the prior art described in the Background Art section. A step 46B is formed in the upper wall 46 of the riser bracket body 40' at the front end of this step 49. In addition, the lower wall 42 of the riser bracket body 40' is reduced in size in front of the rail fixing portion 42A. In addition, a reinforcing patch 50' is provided only around the recliner bracket fixing portion 44A of the riser bracket body 40'.

In this comparative example, if luggage placed in the luggage compartment behind the seat back collides with the seat back during a vehicle collision, stress is concentrated in the riser bracket body 40' near the front of the step 49 of the riser bracket body 40' (the part marked with the symbol SC in FIG. 10). In addition, the riser bracket body 40' is deformed so as to sink toward the inside in the vehicle width direction (outside in the seat width direction) from the vicinity of the part where the lower wall portion 42 is reduced. This causes the cross section of the riser bracket body 40' to collapse, and the riser bracket body 40' is bent starting from the rear end of the rail fixing portion 42A. As a result, the deformation of the riser bracket body 40' becomes large, and the amount of displacement toward the front side of the seat back becomes large, but this can be avoided in this embodiment.

In addition, in this embodiment, the vertical wall portion 44 of the riser bracket main body 40 is provided with a buckle recess 44C recessed outward in the vehicle width direction on the front side of the buckle connection portion 44B. This buckle recess 44C makes it easier to secure the arrangement space for the buckle 76 in the vehicle width direction. As a result, for example, in order to secure the above-mentioned arrangement space, it is no longer necessary to form the step portion 49 in the above comparative example at the rear of the upper part of the riser bracket main body 40. This makes it easier to achieve both suppression of deformation of the riser bracket main body 40 and securing the arrangement space for the buckle 76.

In addition, in this embodiment, a reinforcing patch 50 is fixed to the rear of the riser bracket body 40. This reinforcing patch 50 suppresses deformation of the vertical wall portion 44 of the riser bracket body 40, so deformation of the riser bracket body 40 can be further suppressed. Note that instead of fixing the reinforcing patch 50 to the rear of the riser bracket body 40, the plate thickness of the riser bracket body 40 may be increased.

In addition, in this embodiment, the reinforcing patch 50 has a lower flange portion 54 that extends from the lower end of the patch body portion 52 outward in the vehicle width direction (inward in the seat width direction) and overlaps from above the portion of the lower wall portion 42 of the riser bracket body 40 that includes the rear rail fixing portion 42A. This lower flange portion 54 reinforces the portion of the riser bracket body 40 that includes the rear rail fixing portion 42A, thereby preventing stress from concentrating around the fastening portion of the rear rail fixing portion 42A with the upper rail 18. As a result, deformation of the riser bracket body 40 can be further suppressed.

In addition, in this embodiment, the reinforcing patch 50 has a bead portion 56 formed across the patch body portion 52 and the lower flange portion 54. This bead portion 56 prevents the patch body portion 52 from collapsing in the vehicle width direction relative to the lower flange portion 54, so the reinforcing patch 50 can effectively prevent the vertical wall portion 44 of the riser bracket main body 40 from collapsing in the vehicle width direction.

In addition, in this embodiment, the reinforcing patch 50 extends from the upper end of the patch body 52 outward in the vehicle width direction (inward in the seat width direction) and has an upper flange 58 that contacts or faces the upper wall 46 of the riser bracket body 40 from below. This upper flange 58 reinforces the upper wall 46 of the riser bracket body 40, further suppressing deformation of the riser bracket body 40.

In addition, in this embodiment, the reinforcing patch 50 extends forward of the step 42C formed in the lower wall 42 of the riser bracket body 40, which prevents stress from concentrating around the step 42C in the lower wall 42. As a result, deformation of the riser bracket body 40 can be further suppressed.

In the above embodiment, the present invention is applied to the inner riser bracket 30L fixed to the inner slide rail 14L, but the present invention is not limited to this and may be applied to the outer riser bracket 30R fixed to the outer slide rail 14R.

The present invention has been described above using embodiments, but the present invention can be modified and implemented in various ways without departing from the spirit of the invention. Furthermore, the scope of the invention is not limited to the above embodiments, of course.

10 Vehicle seat frame 14L Inner slide rail (slide rail)
30L Inner riser bracket (riser bracket)
Reference Signs List 40: Riser bracket body 42: Lower wall portion 42A: Rear rail fixing portion 42C: Step portion 44: Vertical wall portion 44A: Reclining bracket fixing portion 44B: Buckle connecting portion 44C: Buckle recess 46: Upper wall portion 50: Reinforcement patch 52: Patch body portion 54: Lower flange portion 56: Bead portion 58: Upper flange portion 66: Reclining mechanism 70: Seat back frame 76: Buckle

Claims (8)

The seat back frame is connected to a reclining mechanism via a riser bracket body, the riser bracket body being fixed to a slide rail attached to a floor of a vehicle, and the riser bracket body being fixed to a rear end portion of the riser bracket body and the reclining mechanism being connected to a reclining mechanism via a recliner bracket.
The riser bracket body is
a rail fixing portion fastened to an upper surface of the slide rail is provided at a rear portion, a step portion is formed on a seat front side of the rail fixing portion, and a lower wall portion is disposed on the seat front side of the step portion and spaced apart from the slide rail toward the seat upper side;
a vertical wall portion extending from an outer end portion in the seat width direction of the lower wall portion toward an upper side of the seat, the vertical wall portion having a recliner bracket fixing portion at a rear end portion to which the recliner bracket is fastened, and a buckle connecting portion to which a buckle of a seat belt device is connected, the vertical wall portion being provided on the seat front side of the recliner bracket fixing portion;
an upper wall portion extending from an upper end of the vertical wall portion toward an inner side in a seat width direction and having at least a rear portion extending flatly in a seat front-rear direction;
A riser bracket having The riser bracket according to claim 1, wherein the vertical wall portion on the seat front side of the buckle connection portion is provided with a buckle recess recessed inward in the seat width direction. a reinforcing patch fixed to a rear portion of the riser bracket body;
3. The riser bracket according to claim 1, wherein the reinforcing patch has a patch body portion overlapping a portion of the vertical wall portion including the recliner bracket fixing portion and the buckle connecting portion from the inner side in the seat width direction. The riser bracket according to claim 3, wherein the reinforcing patch has a lower flange portion that extends from the lower end of the patch body portion toward the inside in the seat width direction and is overlapped from the upper side of the seat with respect to a portion of the lower wall portion that includes the rail fixing portion. The riser bracket according to claim 4, wherein the reinforcing patch has a bead portion formed across the patch body portion and the lower flange portion. The riser bracket according to claim 3, wherein the reinforcing patch has an upper flange portion that extends from the upper end of the patch body portion toward the inside in the seat width direction and contacts or faces the upper wall portion from the lower side of the seat. The riser bracket according to claim 3, wherein the reinforcing patch extends forward of the seat from the step portion. A slide rail attached to a floor of a vehicle;
The riser bracket according to claim 1 or 2, wherein the riser bracket body is fixed to the slide rail;
a recliner bracket fixed to a rear end portion of the riser bracket body;
a seat back frame connected to the recliner bracket via a reclining mechanism;
A vehicle seat frame comprising: