1. A breast pump comprising: a chamber, a membrane is placed into a chamber for the separation chamber to the first and second spaces, the membrane being able to deform in the chamber in response to pressure reduction in the first space to create a pressure reduction in the second space, iogranichitel chamber for limiting deformation membrane, wherein the membrane can be deformed freely in the chamber between a neutral state in which the membrane is spaced from the restrictor and the working state, wherein a certain pressure drop is transmitted the membrane of the first space chamber, wherein the stopper is configured such that the membrane was placed on the stopper for limiting the deformation of the membrane in the chamber, when pressure reduction in the second space is equal to or exceeds the threshold, for limiting the pressure reduction in the second space, characterized in that surface of the chamber in contact with the membrane, and / or the surface of the membrane in contact with the cam, has a textured surface treatment with an arithmetic mean roughness w (Ra) between Ra 0,4 micron and Ra 3,2 microns, so that noise generated when the membrane is in contact with the cam, is moved along it or away from it, minimizirovalsya.2. Milk pump according to claim. 1, characterized in that the threshold value is equal to the pressure reduction to normal operating pressure reduction, so that the membrane is located on the stopper when reaching the normal operating davleniya.3 reduction. Milk pump according to claim. 1, characterized in that the pressure reducing threshold value is greater than the normal operating pressure drop, so that the membrane is spaced from the restrictor when1. Молокоотсос, содержащий:камеру,мембрану, помещаемую в камеру для разделения камеры на первое и второе пространства, причем мембрана способна деформироваться в камере в ответ на снижение давления в первом пространстве для создания снижения давления во втором пространстве, иограничитель в к
