Abstract: The present application relates to an operating unit for a breast pump system. The operating unit comprises a housing and a vacuum pump received in said housing. The housing has a connector (15) for attaching a tube and an outer surface (11) about which a tube can be wrapped. At least a section of the outer surface (11) is curved so that the tube can be wrapped about the housing without buckling. The outer surface (11) comprises a recess (14) and the connector (15) is located in the recess (14), wherein a surface of the recess (14) distends away from the connector (15) so that when a tube is attached to the connector (15), a portion of the tube proximal to the connector (15) does not buckle.

Abstract: The present application relates to an operating unit for a breast pump system. The operating unit comprises a housing and a vacuum pump received in said housing. The housing has a connector (15) for attaching a tube and an outer surface (11) about which a tube can be wrapped. At least a section of the outer surface (11) is curved so that the tube can be wrapped about the housing without buckling. The outer surface (11) comprises a recess (14) and the connector (15) is located in the recess (14), wherein a surface of the recess (14) distends away from the connector (15) so that when a tube is attached to the connector (15), a portion of the tube proximal to the connector (15) does not buckle.

Abstract: The invention relates to a coupling (8) for the releasable coupling of pipe parts, the coupling (8) comprising: a first pipe part (9), which on the inner circumference has two or more rows (18, 19) of lugs (13, 15); a second pipe part (10), which on the outer circumference has two or more rows (30, 31) of lugs (23, 24); wherein the lugs (13, 15, 23, 24) of each of the rows (18, 19, 30, 31) of the first pipe part (9) and of the second pipe part (10) have interspaces (12, 14, 25, 26) which are designed to allow lugs of one pipe part to pass the lugs of the other pipe part for sliding of the pipe parts (9, 10) into and out of one another in the axial direction, and wherein the pipe parts (9, 10), in the slid-together state, can be twisted in the tangential direction to make the lugs (13, 15) of the first pipe part (9) engage on the lugs (23, 24) of the second pipe part (10) for fixing of the pipe parts (9, 10) in the axial direction.