The invention relates to an electric toothbrush provided with longitudinal, also called axial, oscillating movement that occurs at the active end of the bristle plumes, or nylon filaments, without the end or tip of the brush causing potentially traumatic blows, which represent an undesired risk, as still occurs according to the existing prior art.

An electric utility brush with a dynamic brush head which has a rotatable head which is capable of undergoing rotation about two separate axes in order to effect multiple modes of brushing.

An electric toothbrush of the present invention includes: a case having first and second drive shafts exposed therefrom, the first and second drive shafts being rotated in opposite directions and moved forward and backward respectively by a drive unit which is driven by a motor; first and second toothbrush bodies coupled to the first and second drive shafts by first and second coupling units respectively, so as to transmit the rotational force and forward and backward motions of the first and second drive shafts; a brush installed at the ends of the first and second toothbrush bodies so as to clean teeth by the rotational force and forward and backward motions transmitted to the first and second toothbrush bodies; and a third toothbrush body having an auxiliary brush, which is coupled to a third drive shaft of the drive unit installed in the case.

An electric toothbrush that detects plaque on the teeth, ensures accurate plaque detection, and performs cleaning of plaque. The electric toothbrush may include a body having a gripping part and a stem with a brush unit detachably coupled to the body. The electric toothbrush may include a light emitting element for emitting light onto the tooth and a light receiving element for receiving light that reflects off of the tooth. A controller may be included to determine an amount of plaque on the tooth based on the amount of reflected light detected. The electric toothbrush may also include a fluid dispensing system that dispenses fluid based on the amount of reflected light detected. In some aspects, the electric toothbrush may operate in multiple oscillation modes, and it may only dispense fluid in some of the modes but not all of the modes.

A spring mechanism for attaching to a power device drive unit includes a housing connectable to a portion of the power device and a shaft extending through the housing. One end of the shaft is coupled to a workpiece and a bottom member extends from the other end and is positioned adjacent the drive unit. The bottom member includes at least one of a ferromagnetic material and a permanent magnet. The bottom member, shaft and workpiece move upon actuation of the drive unit, and a spring extends laterally outwardly from the shaft between the shaft and the housing. The spring is affixed to one of the shaft and the housing, wherein the spring bends between a deformed position and a return position upon the movement of the bottom member.

An electric toothbrush that detects plaque on the teeth, ensures accurate plaque detection, and performs cleaning of plaque. The electric toothbrush may include a body having a gripping part and a stem with a brush unit detachably coupled to the body. The electric toothbrush may include a light emitting element for emitting light onto the tooth and a light receiving element for receiving light that reflects off of the tooth. A controller may be included to determine an amount of plaque on the tooth based on the amount of reflected light detected. The electric toothbrush may also include a fluid dispensing system that dispenses fluid based on the amount of reflected light detected. In some aspects, the electric toothbrush may operate in multiple oscillation modes, and it may only dispense fluid in some of the modes but not all of the modes.

The present invention relates to a rotating electric toothbrush comprising: a main body having a receiving space formed therein, a driving means received in the interior of the main body and providing a rotational force, a toothbrush handle having one end detachably coupled to the driving means, and receiving a rotational force of the driving means to be rotated, a support means coupled to the outer peripheral surface of the other end of the toothbrush handle and having plate-shaped support bodies made of a ductile material and radially formed to be spaced apart from each other, and a plurality of toothbrush bristles implanted between the support bodies. The present invention has a structure in which the toothbrush bristles are radially implanted on the outer peripheral surface of the end of the cylindrical rotating toothbrush handle, thereby removing food leftovers sandwiched on a tooth surface or at an interdental gap without damage of gums, and more surely removing dental plaque from the tooth surface due to silicon bristles implanted between the toothbrush bristles. Further, the silicon bristles implanted between the toothbrush bristles support the toothbrush bristles, thereby preventing deformation of the toothbrush bristles, and a space for receiving toothpaste is formed between the silicon bristles, thereby preventing the toothpaste from easily slipping off. Further, a tongue cleaner, which is detachable and made of a silicon material, is further comprised, thereby easily cleaning a tongue.

Disclosed by the present invention are a swing motor and an electronic device, the swing motor comprising a seat; at least two movable members, comprising a first movable member and a second movable member arranged to be spaced apart, wherein the first movable member and the second movable member bear opposite electromagnetic thrusts; elastic support members that correspond one-to-one to the movable members, comprising a first elastic support member and a second elastic support member, wherein the first movable member is mounted onto the seat by means of the first elastic support member, and the second movable member is mounted onto the seat by means of the second elastic support member; further comprised is a twisting elastic member, one end of the twisting elastic member being connected to the first movable member or the second movable member, and the other end being connected to an executing member.

An electrically driven device includes an electric motor with a drive shaft having a first rotary axis and a drive pin eccentrically thereto, and a driven shaft having a second rotary axis and mounted for pivoting motion. The driven shaft is coupled to the drive shaft by a scotch yoke mechanism, converting a rotary motion of the drive shaft into a reciprocating pivoting motion of the driven shaft. The scotch yoke mechanism includes a cross slider having a sliding support extending perpendicular to the first rotary axis and receiving the drive pin either directly or by a sliding block having a bearing receiving the pin. The cross slider is axially guided to move in an axial direction perpendicular to the first rotary axis and to the extension of the sliding support. The driven shaft is coupled to the cross slider by a pivotable crank arm, thereby converting a rotary motion of the drive shaft into a reciprocating motion of the driven shaft.

A personal care appliance (10), or power toothbrush, comprises a handle (16) including a drive train (20), a motor controller (18), and an attachment (12) that includes a resonant structure (14). The motor controller (18) controls an operation of the drive train (20) to produce at least one of a first mechanical stimulus and a second mechanical stimulus, the first mechanical stimulus comprising a first cleaning motion (42) having a first resonant frequency, the second mechanical stimulus comprising a second movement having a second resonant frequency. The resonant structure (14) implements the first cleaning motion (42) and an additional resonant motion (44,46,48,50,52,60) as well as the cleaning motion (42).