Seat frame
To reduce the weight of a cross member bridged between right and left sides of a seat frame. A seat frame includes an upper frame forming an upper portion of a seat back frame, and a cross member bridged at the upper frame. The cross member includes right and left end portions in a seat width direction, the right and left end portions being fixed to the upper frame; and a first recessed portion that is recessed upward or downward and provided between the right and left end portions. The first recessed portion is provided at a center portion of the cross member in the seat width direction.
1 . A seat frame for a vehicle seat, comprising:
a side frame that is arranged on one side of right and left sides of the seat frame,
wherein
the side frame includes a side frame side portion that forms a side portion of the side frame,
the side frame side portion is provided with a first reinforcement portion that extends in an upper-to-lower direction along a rear edge of the side frame side portion and a plurality of through-holes,
the plurality of through-holes includes a plurality of airbag attachment holes for attachment of an airbag unit,
the plurality of airbag attachment holes includes an upper airbag attachment hole and a lower airbag attachment hole that is provided below the upper airbag attachment hole,
a second reinforcement portion that extends along a front edge of the side frame side portion is provided above the upper airbag attachment hole,
a third reinforcement portion that extends in a seat front-to-rear direction is provided at a position separated in a downward direction from the second reinforcement portion in the side frame side portion,
the third reinforcement portion is provided to overlap the upper airbag attachment hole in the upper-to-lower direction,
the second reinforcement portion and the third reinforcement portion comprise beads that protrude from a surface of the side frame side portion on which the plurality of through-holes are formed, and
the second reinforcement portion is provided at a position that does not overlap the upper airbag attachment hole in the seat front-to-rear direction.
2 . The seat frame according to claim 1 , wherein the third reinforcement portion is provided between the upper airbag attachment hole and the lower airbag attachment hole in the upper-to-lower direction.
3 . The seat frame according to claim 2 , wherein the third reinforcement portion extends forward beyond the upper airbag attachment hole.
4 . The seat frame according to claim 2 , wherein the third reinforcement portion is provided at a position that does not overlap the lower airbag attachment hole in the seat front-to-rear direction.
5 . The seat frame according to claim 2 , wherein the third reinforcement portion is not connected to the first reinforcement portion and is provided independently.
6 . The seat frame according to claim 2 , wherein a lower end of the first reinforcement portion is bent toward a front of the seat frame.
7 . The seat frame according to claim 2 , wherein
a fourth reinforcement portion that extends in the seat front-to-rear direction is provided at a position separated in the downward direction from the third reinforcement portion in the side frame side portion, and
the fourth reinforcement portion is provided at a position that overlaps the lower airbag attachment hole in the seat front-to-rear direction.
8 . The seat frame according to claim 1 , wherein the third reinforcement portion extends forward beyond the upper airbag attachment hole.
9 . The seat frame according to claim 8 , wherein the third reinforcement portion is provided at a position that does not overlap the lower airbag attachment hole in the seat front-to-rear direction.
10 . The seat frame according to claim 8 , wherein the third reinforcement portion is not connected to the first reinforcement portion and is provided independently.
11 . The seat frame according to claim 8 , wherein a lower end of the first reinforcement portion is bent toward a front of the seat frame.
12 . The seat frame according to claim 8 , wherein
a fourth reinforcement portion that extends in the seat front-to-rear direction is provided at a position separated in the downward direction from the third reinforcement portion in the side frame side portion, and
the fourth reinforcement portion is provided at a position that overlaps the lower airbag attachment hole in the seat front-to-rear direction.
13 . The seat frame according to claim 1 , wherein the third reinforcement portion is provided at a position that does not overlap the lower airbag attachment hole in the seat front-to-rear direction.
14 . The seat frame according to claim 1 , wherein the third reinforcement portion is not connected to the first reinforcement portion and is provided independently.
15 . The seat frame according to claim 1 , wherein
a fourth reinforcement portion that extends in the seat front-to-rear direction is provided at a position separated in the downward direction from the third reinforcement portion in the side frame side portion, and
the fourth reinforcement portion is not connected to the first reinforcement portion and is provided independently.
16 . The seat frame according to claim 1 , wherein a lower end of the first reinforcement portion is bent toward a front of the seat frame.
17 . The seat frame according to claim 16 , wherein the fourth reinforcement portion is connected to the first reinforcement portion.
18 . The seat frame according to claim 1 , wherein
a fourth reinforcement portion that extends in the seat front-to-rear direction is provided at a position separated in the downward direction from the third reinforcement portion in the side frame side portion, and
the fourth reinforcement portion is provided at a position that overlaps the lower airbag attachment hole in the seat front-to-rear direction.
19 . A seat frame for a vehicle seat, comprising:
a seat back frame;
a seat cushion frame; and
a reclining unit,
wherein
the seat back frame includes an upper frame, side frames that forms end portions of the seat back frame in a seat width direction, and a lower frame that couples lower end portions of the side frames with each other,
a headrest attachment portion is attached to the upper frame,
a pressure receiving member is bridged at a center portion of the seat back frame,
the seat cushion frame includes cushion side frames that forms end portions of the seat cushion frame in the seat width direction, a pan frame that forms a front end portion of the seat cushion frame, and a coupling member that couples the cushion side frames with each other,
a cushion side pressure receiving member is provided at a center portion of the seat cushion frame,
coupling brackets are attached to upper portions of rear end portions of the cushion side frames,
the side frames are coupled to the coupling brackets via the reclining unit,
the side frame includes a side frame side portion that forms a side portion of the side frame,
the side frame side portion is provided with a first reinforcement portion that extends in an upper-to-lower direction along a rear edge of the side frame side portion and a plurality of through-holes,
the plurality of through-holes includes a plurality of airbag attachment holes for attachment of an airbag unit,
the plurality of airbag attachment holes includes an upper airbag attachment hole and a lower airbag attachment hole that is provided below the upper airbag attachment hole,
a second reinforcement portion that extends along a front edge of the side frame side portion is provided above the upper airbag attachment hole,
a third reinforcement portion that extends in a seat front-to-rear direction is provided at a position separated in a downward direction from the second reinforcement portion in the side frame side portion,
the third reinforcement portion is provided to overlap the upper airbag attachment hole in the upper-to-lower direction,
the second reinforcement portion and the third reinforcement portion comprise beads that protrude from a surface of the side frame side portion on which the plurality of through-holes are formed, and
the second reinforcement portion is provided at a position that does not overlap the upper airbag attachment hole in the seat front-to-rear direction.
20 . A method for manufacturing a seat frame of a vehicle seat, comprising:
preparing a side frame that includes a side frame side portion that forms a side portion of the side frame, the side frame side portion being provided with a first reinforcement portion that extends in an upper-to-lower direction along a rear edge of the side frame side portion and a plurality of through-holes; and
arranging the side frame on one side of right and left sides of the seat frame,
wherein
the plurality of through-holes includes a plurality of airbag attachment holes for attachment of an airbag unit,
the plurality of airbag attachment holes includes an upper airbag attachment hole and a lower airbag attachment hole that is provided below the upper airbag attachment hole,
a second reinforcement portion that extends along a front edge of the side frame side portion is provided above the upper airbag attachment hole,
a third reinforcement portion that extends in a seat front-to-rear direction is provided at a position separated in a downward direction from the second reinforcement portion in the side frame side portion,
the third reinforcement portion is provided to overlap the upper airbag attachment hole in the upper-to-lower direction,
the second reinforcement portion and the third reinforcement portion comprise beads that protrude from a surface of the side frame side portion on which the plurality of through-holes are formed, and
the second reinforcement portion is provided at a position that does not overlap the upper airbag attachment hole in the seat front-to-rear direction.