Piston-type breast pump

A piston-type breast pump which includes a housing and a piston-type pumping arrangement received in the housing, comprising:

• a DC motor, a gear reducer and a control circuit which are received in the housing;
• a gear swing unit operatively communicated with said gear reducer and connected to said pumping arrangement;
• first and second position sensor plates for detecting a far point position and a near point position respectively provided between said gear swing unit and said gear reducer;
• a buffer spring connected to said gear swing unit;
• a stroke sensor wheel positioned on an axis member of said DC motor;
• and
• a speed control button, stroke control button, a promoting lactation button and a suction adjustment screw positioned on an outer side of said housing;
• wherein said housing has a vertical design having an indented portion defining a bottle side support on said housing and comprising a bottle bottom support provided thereon in a detachable manner.