Vehicle seat

1. A vehicle seat comprising:

a seat back;

a rear frame provided in the seat back and configured to have a substantially rectangular shape; and

a retractor provided in an upper portion of the seat back that is configured to retract a seat belt, wherein

the rear frame includes a first side member and a second side member extending in a vertical direction, a connecting member extending in a widthwise direction, and a bracket that mounts the retractor at the upper portion of the seat back,

the connecting member and one of the first side member and the second side member are coupled together with the bracket at an upper corner portion of the rear frame,

the bracket is coupled with the connecting member at a first position at which the connecting member intersects with a virtual line extending from the first side member and at a second position that is shifted from the first position toward a side where the second side member is arranged, and

the bracket is arranged at a position lower than the connecting member, wherein

the first position and the second position are arranged at an upper end of the bracket

the bracket includes a first recess at the first position and a second recess at the second position, and

the connecting member is mounted on the first recess and the second recess of the bracket.

2. The vehicle seat according to claim 1 , wherein

a length of the first side member in the vertical direction is shorter than a length of the second side member in the vertical direction,

a lower end of the first side member and a lower end of the second side member are arranged at substantially the same height, and

an upper end of the first side member and the connecting member are coupled together with the bracket.

3. The vehicle seat according to claim 1 , wherein the connecting member includes a first connecting member and a second connecting member, each of which extend in the widthwise direction.

4. The vehicle seat according to claim 3 , wherein

the first connecting member is provided at an upper side in the rear frame, and the second connecting member is provided at a lower side in the rear frame, and

a length of the first connecting member in the widthwise direction is substantially the same with a length of the second connecting member in the widthwise direction.

5. The vehicle seat according to claim 4 , wherein

a length of the first side member in the vertical direction is shorter than a length of the second side member in the vertical direction,

a lower end of the first side member and a lower end of the second side member are arranged at substantially the same height, and

an upper end of the first side member and the first connecting member are coupled together with the bracket.

6. The vehicle seat according to claim 1 , wherein the retractor is provided within the rear frame and the retractor is arranged at a position lower than the connecting member.