Seat frame

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.

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.