FIELD: medicine.
SUBSTANCE: group of inventions relates to medical equipment, specifically to individual care devices, in particular to toothbrushes. Individual care device comprises a handle including an actuator, a drive shaft and a nozzle. Nozzle has main part having main axis extending between its proximal end and distal end, wherein proximal end is connected to drive shaft, wherein the nozzle further includes a mass-spring identifiable unit having at least one identifiable resonance frequency in response to said excitation, wherein said at least one identifiable resonance frequency comprises a resonant frequency selected from at least two different resonance frequencies, and a controller configured to control the nozzle by the actuator within a predetermined frequency range, which includes said excitation, wherein the controller is further configured to, at least in the detection mode, uniquely identify the nozzle by detecting the presence of at least one identifiable resonance frequency of the mass spring-identified pack unit in response to said excitation, wherein the spring-weight identifiable unit comprises at least one of: (i) a ring-shaped mass-spring component; and (ii) spatial configuration of the main part, wherein the annular mass-spring component comprises a separate mass and spring component having a ring-shaped mass centred around the main axis and mechanically connected to main part by means of flat springs, spatial configuration of main part includes at least one element, made with possibility of demonstration of resonance mode of main part, corresponding to said at least one identifiable resonant frequency of mass-spring identifiable unit.
EFFECT: use of inventions widens the range of electric toothbrushes with replaceable cleaning heads.
10 cl, 12 dwg
