Abstract: A breast pump can be configured to be capable of easily attaching/detaching a primary side serving as a sealed space which is in communication with a milking space and allows the passage of breast milk, with a secondary side in which a case is connected with a pressure changing apparatus. The breast pump can include a breast pump main body connected to the pressure changing apparatus by a conduit, wherein a milking part is disposed so as to liquid-tightly separate a sealed space (or a space that is in fluid communication with the sealed space), and the pressure changing apparatus from each other. A pressure transmission part for transmitting pressure changed by the pressure changing apparatus can be provided. The pressure transmission part can include a deformable part where a volume in the sealed space can be deformed by a pressure fluctuation generated by the pressure changing apparatus.

Abstract: A breast pump, including a housing container, a breast pump body having an attachment and detachment part, a negative pressure generating member attached to the breast pump body, and an operation unit. The breast pump body includes a diameter-expanded milking part, a small valve chamber, and an attachment part communicating with the small valve chamber and attaches thereto the negative pressure generating member that creates the negative pressure needed to express milk; the negative pressure generating member includes a connector to which the operation unit is connected, a comparatively soft attachment and detachment part having elasticity and attached detachably to the attachment part, a wall part having such rigidity that an external shape can be kept, and a deformable part provided on the inside of the wall part integrally with the wall part, is less thick than the wall part, and is deformed to create the negative pressure.

Abstract: A breast pump can be configured such that is can be easily dismantled for cleaning and easily re-assembled and is formed such that an operator or operating means thereof do not easily become detached during operation. The breast pump can include a storage container for storing milk, a breast pump main body, and an operator or operating means attached to the breast pump main body for deforming a negative pressure generating member attached to the breast pump main body. The operator can take the form of a lever, and can have an engaged portion that is engaged to an engagement portion on the breast pump main body side and includes an engagement opening formed on one end side of the operator.

Abstract: A breast pump can be configured to be capable of easily attaching/detaching a primary side serving as a sealed space which is in communication with a milking space and allows the passage of breast milk, with a secondary side in which a case is connected with a pressure changing apparatus. The breast pump can include a breast pump main body connected to the pressure changing apparatus by a conduit, wherein a milking part is disposed so as to liquid-tightly separate a sealed space (or a space that is in fluid communication with the sealed space), and the pressure changing apparatus from each other. A pressure transmission part for transmitting pressure changed by the pressure changing apparatus can be provided. The pressure transmission part can include a deformable part where a volume in the sealed space can be deformed by a pressure fluctuation generated by the pressure changing apparatus.

Abstract: A breast pump can be configured such that is can be easily dismantled for cleaning and easily re-assembled and is formed such that an operator or operating means thereof do not easily become detached during operation. The breast pump can include a storage container for storing milk, a breast pump main body, and an operator or operating means attached to the breast pump main body for deforming a negative pressure generating member attached to the breast pump main body. The operator can take the form of a lever, and can have an engaged portion that is engaged to an engagement portion on the breast pump main body side and includes an engagement opening formed on one end side of the operator.

Abstract: A breast pump, including a housing container, a breast pump body having an attachment and detachment part, a negative pressure generating member attached to the breast pump body, and an operation unit. The breast pump body includes a diameter-expanded milking part, a small valve chamber, and an attachment part communicating with the small valve chamber and attaches thereto the negative pressure generating member that creates the negative pressure needed to express milk; the negative pressure generating member includes a connector to which the operation unit is connected, a comparatively soft attachment and detachment part having elasticity and attached detachably to the attachment part, a wall part having such rigidity that an external shape can be kept, and a deformable part provided on the inside of the wall part integrally with the wall part, is less thick than the wall part, and is deformed to create the negative pressure.