Patent ID: 7758540

Claim:
A breast pump comprising: a breast pump main body including a milking portion configured to be brought into contact with a breast of a user to express milk via negative pressure, and means for generating negative pressure disposed in said milking portion for generating said negative pressure; means for storing said expressed milk configured to be attached to and detached from said breast pump main body; and means for opening/closing and temporarily halting and permitting passage of said milk expressed by said breast pump main body into said means for storing, said means for opening/closing disposed between said breast pump main body and said means for storing, wherein said milking portion includes: a shape maintaining portion configured to maintain said milking portion in an enlarged-diameter horn shape; and a negative pressure generating portion that serves as a part of said means for generating negative pressure configured to be attached to and detached from an inner side of said shape maintaining portion, and at least one end of said negative pressure generating portion at an enlarged diameter side includes a pressing portion, the pressing portion includes an apex of a folded-back portion of said negative pressure generating portion, while another end of said negative pressure generating portion is connected to said means for opening/closing.