Elastic and power generation body assembly for a tire

A tire assembly comprising:

• a tire for mounting on a vehicle;
• an elastic body on an inner side of the tire;
• and
• a power generation body between an inner surface of the tire and the elastic body,
• wherein the power generation body includes:
• a first member having a first insulating film forming a first surface;
• and
• a second member having a second insulating film forming a second surface facing the first surface and contacting the first surface,
• the first member and the second member are configured such that a true contact area between the first surface and the second surface changes in response to pressure applied to the first member and the second member, and
• the first insulating film and the second insulating film are configured such that one of the films is positively charged and the other of the films is negatively charged due to the true contact area changing,
• wherein the elastic body biases the power generation body toward the inner surface of the tire,
• wherein the elastic body includes:
• a base mainly formed from an elastomer;
• and
• a cord layer constituted by a plurality of cord members embedded in the base,
• wherein a peripheral portion of the base is fixed to the inner surface of the tire by adhesion, and
• wherein a length of each of the plurality of cord members along a circumferential direction of the tire is not less than a ground contact length of the tire.