Terminal structure

A terminal structure for a positive-electrode-side contact terminal and a negative-electrode-side contact terminal in an apparatus to be loaded with a cylindrical secondary battery, the cylindrical secondary battery including a cylindrical body part whose surface is insulated with an insulating layer, a positive electrode terminal protruding from one end of the body part and a negative electrode terminal located and exposed at other end of the body part, the positive-electrode-side contact terminal and the negative-electrode-side contact terminal being brought into contact with the positive electrode terminal and the negative electrode terminal, respectively, of the cylindrical secondary battery, wherein

• the terminal structure satisfies relationships of
• D1<T1<D2
• and
• T1<T2=D2
• where D1 is a length of the body part, D2 is a total length of the cylindrical secondary battery corresponding to a length from a tip of the positive electrode terminal to the negative electrode terminal, T1 is an inter-contact-terminal distance when the cylindrical secondary battery is not present between the positive-electrode-side contact terminal and the negative-electrode-side contact terminal, the inter-contact-terminal distance being a length between a portion of the positive-electrode-side contact terminal which comes into contact with the positive electrode terminal and a portion of the negative-electrode-side contact terminal which comes into contact with the negative electrode terminal, and T2 is the inter-contact-terminal distance when the cylindrical secondary battery is held between the positive-electrode-side contact terminal and the negative-electrode-side contact terminal.