Vehicle seat

1. A vehicle seat comprising:

a lower member on a floor side of a vehicle;

a frame member provided above the lower member and extending in a front-rear direction of the vehicle; and

a link member connected between the lower member and the frame member,

wherein the link member includes

a first circular hole portion connected to the lower member so as to pivot about an axis in a width direction of the vehicle,

a second circular hole portion connected to the frame member,

a main body of plate shape in which the first circular hole portion and the second circular hole portion are formed,

a flange projecting from the main body in a direction crossing the main body,

a recess formed to bring the flange closer to an imaginary straight line connecting a center of the first circular hole portion with a center of the second circular hole portion, and

an offset portion formed to shift the main body in a thickness direction of the main body,

wherein the offset portion extends from an outside edge of the main body opposite to the flange to the recess.

2. The vehicle seat according to claim 1 , wherein the offset portion extends from an outside edge of the main body opposite to the flange so as to be closer to a vertex of the recess.

3. The vehicle seat according to claim 1 , wherein the recess is formed in a curve.

4. The vehicle seat according to claim 1 , wherein an angle of intersection between a direction of extension of the offset portion and the imaginary straight line is not less than 45° and not greater than 135°.

5. The vehicle seat according to claim 1 , wherein X is not less than 0.25 and not greater than 4 when L1: L2=1: X, where

L1 represents a direct distance between the center of the first circular hole portion and a point of intersection between a perpendicular drawn from a vertex of the recess to the imaginary straight line and the imaginary straight line, and

L2 represents a direct distance between the center of the second circular hole portion and the point of intersection between the perpendicular drawn from the vertex of the recess to the imaginary straight line and the imaginary straight line.

6. The vehicle seat according to claim 1 , wherein the link member is a rear outer link member located, in the vehicle seat, on an outer side in the width direction and on a rear side of the vehicle.

7. The vehicle seat according to claim 1 , wherein the frame member is included in the framework of a seat cushion on which an occupant of the vehicle can sit.

8. The vehicle seat according to claim 1 , further comprising:

another frame member extending in the front-rear direction of the vehicle, the frame member and the other frame member being arranged in the width direction of the vehicle; and

a pair of rod members coupling the frame member and the other frame member in the width direction of the vehicle.

9. The vehicle seat according to claim 1 , further comprising:

another frame member extending in the front-rear direction of the vehicle, the frame member and the other frame member being arranged in the width direction of the vehicle; and

a pair of rod members coupling the frame member and the other frame member in the width direction of the vehicle,

wherein the frame member, the other frame member, and the pair of rod members are included in the framework of a seat cushion on which an occupant of the vehicle can sit.