Cleaning device

A personal cleaning care appliance comprising a handle with a handle housing and a cleaning device converting a reciprocating motion into a rotary motion,

• the cleaning device comprising:
• a cleaning device housing detachably connected to the handle housing;
• a bracket for supporting the cleaning device, detachably fixed to the cleaning device housing;
• a cleaning element carrier and cleaning elements distributed on the cleaning element carrier, wherein one end of the cleaning element carrier opposite to an end of the cleaning element carrier having the cleaning elements distributed is coupled with the cleaning device housing with a seal;
• a cleaning device transducer;
• a passive assembly which is located above a drive coil in the handle housing and comprises a permanent magnet carrier and a plurality of permanent magnets, wherein the permanent magnet carrier is fixed to an end of the cleaning device transducer opposite to a cleaning element carrier coupling shaft, the plurality of permanent magnets are fixed to the permanent magnet carrier;
• wherein the cleaning device transducer comprises a transducer bracket, at least two transducer elastic elements, transducer elastic element retainers and the cleaning element carrier coupling shaft, the cleaning element carrier coupling shaft is tightly inserted into the cleaning element carrier so that the cleaning device transducer is fixedly coupled with the cleaning element carrier;
• one end of each transducer elastic element is fixedly coupled with a corresponding transducer elastic element retainer, and the other end of each transducer elastic element is fixedly coupled with a transmission arm of the transducer bracket coupling elastic element;
• wherein the cleaning device having a natural vibration frequency fnatural is constituted utilizing a bending strain of an elastic material, so that the natural frequency fnatural of the cleaning device is in a range of 100 Hz to 400 Hz, and a relationship between the natural frequency fnatural and a frequency f0 of an electromagnetic force generated by the drive coil in the handle meets 0.85f0<fnatural<1.05f0,
• wherein the plurality of permanent magnets are configured in such a way that, when an alternating current flows through the drive coil fixed in the handle housing, the drive coil and the plurality of permanent magnets interact to generate an electromagnetic force, such that a resultant force of the electromagnetic forces generated between the drive coil and the plurality of permanent magnets and acting on the passive assembly is close to zero, i.e., the forces acting on the passive assembly is balanced, and at the same time, the passive assembly is subjected to a torque rotating in a clockwise or counterclockwise direction formed by the electromagnetic forces, wherein a maximum projection area formed by projecting a minimum plane of a same horizontal section containing all the permanent magnets of the passive assembly on a plane perpendicular to a rotation axis of the cleaning device transducer is less than 60 mm×60 mm.