Connection bar mounting structure and vehicle seat

A vehicle seat, comprising:

• a seat cushion frame attachable to a floor of a vehicle, the seat cushion frame configured to be raised and lowered relative to the floor, wherein
• the seat cushion frame comprises:
• a pair of side frames spaced apart in a width direction of the vehicle seat;
• a pair of link members, each link member including a first hole part in a middle part, each link member including a first fixation part on a first end, the first fixation part rotatably supported by each of the pair of side frames, and a second fixation part on a second end opposite to the first fixation part across the first hole part, the second fixation part rotatably supported by a vehicle member;
• and
• a connection bar, each end of the connection bar fixed to the first hole part of each of the pair of link members, wherein
• each of the pair of link members includes a first bending rigidity reduced section between the middle part and the first fixation part and a second bending rigidity reduced section between the middle part and the second fixation part, the first and second bending rigidity reduced sections having bending rigidity smaller than those of the middle part, the first fixation part, and the second fixation part.

A connection bar mounting structure, comprising:

• a pair of link members, each link member including a first hole part in a middle part;
• a pair of vehicle members, each vehicle member configured to rotatably support each of the pair of link members at a first fixation part on a first end of each of the link members;
• a pair of side frames, each side frame configured to rotatably support each of the pair of link members at a second fixation part on a second end of each of the link members opposite to the first fixation part on the first end across the first hole part;
• and
• a connection bar, each end of the connection bar fixed to the first hole part of each of the pair of link members, wherein
• each of the pair of link members includes a first bending rigidity reduced section between the middle part and the first fixation part and a second bending rigidity reduced section between the middle part and the second fixation part, the first and second bending rigidity reduced sections having bending rigidity smaller than those of the middle part, the first fixation part, and the second fixation part,
• each of the pair of link members includes flanges bent at edges of the middle part, the first fixation part, and the second fixation part,
• the first bending rigidity reduced section is a cutout having substantially no bent part between the flange of the middle part and the flange of the first fixation part, and
• the second bending rigidity reduced section is a cutout having substantially no bent part between the flange of the middle part and the flange of the second fixation part.