Transponder for tire, tire with transponder and manufacturing method of tire with transponder

A tire with a transponder, equipped with a transponder having a sensor for detecting physical quantity in an atmosphere within a tire air chamber to convert into an electric signal and wireless communication means, said wireless communication means performing communication with a main device, and transmitting, on receipt of a predetermined question signal from said main device, an answering signal including detection result of said physical quantity to said main device,

• wherein said transponder has a housing for hermetically sealing and housing said sensor and said wireless communication means in a hermetically sealed state, and
• wherein said housing is embedded in the tire inner wall and
• wherein a hollow protruded portion protrudes from the main body of said housing, is at least partially embedded in the tire inner wall and is operative to maintain said sensor and said wireless communication means in the hermetically sealed state, said hollow protruded portion and said housing providing a space defined partially by said housing and partially by said hollow protruded portion, at least a section of the hollow protruded portion being removed from the main body of said housing to form an aperture resulting in the hermetically sealed state changing into an unsealed state so that the space enables communication between the physical quantity sensing unit of said sensor and the atmosphere within the tire air chamber.

A manufacturing method of a tire with transponder equipped with a transponder having a sensor for detecting physical quantity in an atmosphere within a tire air chamber to convert into an electric signal and wireless communication means, said wireless communication means performing communication with a main device, and transmitting, on receipt of a predetermined question signal from said main device, an answering signal including detection result of said physical quantity to said main device, comprising the steps of:

• through the use of said transponder provided with a housing for hermetically sealing and housing said sensor and said wireless communication means in a hermetically sealed state, having a hollow protruded portion integrally formed with and projecting from said housing to maintain said sensor and said wireless communication means in the hermetically sealed state and having space defined at least partially by said hollow protruded portion and said housing;
• embedding said transponder in the inner wall of a green tire before vulcanization;
• vulcanizing said green tire in which said transponder is embedded;
• and
• removing, after vulcanization, at least a section of said hollow protruded portion together with part of the inner wall surface of said tire causing the hermetically sealed state to change to an unsealed state so that the atmosphere within said tire air chamber communicates with physical quantity sensing unit of said sensor through the space in said housing.