US Patent 12092539 Force sensor

An elastic body is fixed to a main body and a movable body and is deformable according to the movement of the movable body. A strain sensor is provided on the elastic body and includes a strain body. The movable body includes an opening. The stopper member includes a first contact portion and a second contact portion provided inside the opening, whose distances from the opening are different from each other. The first contact portion is located in a direction in which the movable range of the strain body is great, and the second contact portion is located in a direction in which the movable range of the strain body is small.