Seat load measuring apparatus

1. A seat load measuring apparatus for measuring a load of a vehicle seat, comprising:

a base for bearing the load applied to the vehicle seat;

an arm supported by the base for receiving the load applied to the vehicle seat;

a load sensor supported by the arm for detecting the load applied to the vehicle seat; and

a seat rail for guiding the vehicle seat slidably in a longitudinal direction of the vehicle,

wherein the base is fixed to a lower side of the seat rail and is arranged so that an open face of the base faces in a downward direction;

wherein the arm is connected by a stopper pin inserted through holes formed in the base to a mounting bracket fixed to a vehicle body;

wherein a base bracket including a load bearing portion is attached to the base and is fixed to the lower side of the seat rail; and

wherein the load bearing portion is configured to contact the stopper pin when a load exceeding a predetermined value is applied to the seat rail so that the load exceeding a predetermined value is borne by the load bearing portion.

2. The seat load measuring apparatus of claim 1 , wherein the seat rail includes a rail mounting member connected to the base bracket.

3. The seat load measuring apparatus of claim 2 , wherein the seat rail and the rail mounting member are integral.

4. A seat load measuring apparatus, comprising:

a seat rail;

a base fixed to the seat rail;

an arm configured to transmit load from the base to a load sensor;

a base bracket;

a mounting bracket fixed to a vehicle body; and

a stopper pin,

wherein the base is formed in an inverted substantially U-shape,

wherein the base, the arm, the base bracket, and the mounting bracket are interconnected by the stopper pin, and

wherein the base bracket is configured to contact the stopper pin only when a load applied to the seat rail exceeds a predetermined value.