US Patent 12059514 Breast pump and breast shield used therein

The present invention relates to a breast shield used in a breast pump configured to pump human breast milk. The breast shield includes a hard base portion including both ends and a sidewall connecting the both ends to include a hollow in the base portion in which the both ends are open and a human mamma is accommodated in the hollow through any one of the both ends, through holes passing through the sidewall, and a soft portion configured to surround an outer surface and an inner surface of the base portion, prevent an airflow through the through holes, and have flexibility.