Breast shield with a flexible edge

A breast shield for a breast pump for expressing human breast milk, wherein the breast shield comprises a rigid base part with a tubular connection piece and with a funnel, which is integrally molded in one piece thereon and widens away from the connection piece, for receiving a mother's breast, wherein the breast shield additionally comprises a flexible collar which is arranged on the funnel at an end of the funnel remote from the connection piece and which is realized to be placed onto the mother's breast, wherein the named end of the funnel forms a first contact surface, wherein the collar comprises an end which faces the funnel and forms a second contact surface,

• wherein
• the first and the second contact surface adjoin one another in an obtuse manner in a circumferential connecting joint;
• wherein the funnel comprises a first wall thickness in the region of the connecting joint and the collar comprises a second wall thickness in the region of the connecting joint;
• and
• wherein the first wall thickness and the second wall thickness are approximately the same size.