An abrasive tool, including an abrasive carrier (1) having a shaft (2) for connecting the abrasive carrier (1) to a driving device for rotatably driving the abrasive carrier (1) about a longitudinal axis (X) and having a core (3) connected to an axial end (4) of the shaft (2), and an abrasive article (15) having a surface (16) being circumferentially closed about the longitudinal axis (X) and enclosing a cavity (17) extending along the longitudinal axis (X), wherein the core (3) is accommodated at least partially in the cavity (17), and wherein the core (3) includes a material mixture which includes a plastic with a heat-conductive filler, wherein the plastic is foamed, and wherein the filler has a thermal conductivity greater than 35 watts per meter and per Kelvin.

An abrasive tool, including an abrasive carrier (1) having a shaft (2) for connecting the abrasive carrier (1) to a driving device for rotatably driving the abrasive carrier (1) about a longitudinal axis (X) and having a core (3) connected to an axial end (4) of the shaft (2), and an abrasive article (15) having a surface (16) being circumferentially closed about the longitudinal axis (X) and enclosing a cavity (17) extending along the longitudinal axis (X), wherein the core (3) is accommodated at least partially in the cavity (17), and wherein the core (3) includes a material mixture which includes a plastic with a heat-conductive filler, wherein the plastic is foamed, and wherein the filler has a thermal conductivity greater than 35 watts per meter and per Kelvin.

A system, device and method for nail care is provided. The nail care system includes a shaping system, a polish removal system and/or a cuticle management system; a vision system; a nail polish application system; and a mobility system. The nail system may further include an accelerated drying system, a hand massage system, a nail identification/diagnosis/estimation of conditions system, an enclosure, a hand/foot rest system, a computer software system, a computer hardware system, a cartridge/pod system, and a multi-tool system. Related apparatuses, techniques and articles are also described.

An actuator has: an affixed section having a coil; a first mobile section that is elastically held and disposed so as to allow movement in the axial direction inside one end of the coil, and has a first magnet magnetized in the axial direction of the coil and disposed on one end in the axial direction; and a second mobile section that is elastically held and disposed so as to allow movement in the axial direction inside another end of the coil, and has a second magnet magnetized in the axial direction and disposed on the other end in the axial direction. The first and second magnets are disposed such that identical magnetic poles are in the same direction in the axial direction, and the first and second mobile sections move in opposite directions along the same axis when a current is applied to the coil.

An actuator has: an affixed section having a coil; a first mobile section that is elastically held and disposed so as to allow movement in the axial direction inside one end of the coil, and has a first magnet magnetized in the axial direction of the coil and disposed on one end in the axial direction; and a second mobile section that is elastically held and disposed so as to allow movement in the axial direction inside another end of the coil, and has a second magnet magnetized in the axial direction and disposed on the other end in the axial direction. The first and second magnets are disposed such that identical magnetic poles are in the same direction in the axial direction, and the first and second mobile sections move in opposite directions along the same axis when a current is applied to the coil.

Provided is an electric grinder. The grinder includes a swing motor and a grinding head driven by the swing motor. The swing motor further includes a U-shaped yoke, four permanent magnets and a swing arm. Alternating magnetic poles can be generated at end faces of the two legs under control of a control circuit. The four permanent magnets are sequentially distributed on the same circumference of a circle having the fulcrum as a center. The control circuit generates alternating pulses with adjustable pulse widths, which change the moving direction of the permanent magnets alternately, so that the permanent magnets move back and forth. The swing arm drives the grinding head to reciprocate at a high speed with small swinging amplitude, thereby cleaning the body surface (skin, nails or the like) of living bodies including human beings and animals.

A multi-movement cosmetic assembly includes a housing defining an interior; a drive system disposed within the housing; a sleeve received within the housing; and a drive shaft positioned in the sleeve. The drive system is operably coupled to the sleeve and the drive shaft such that actuation of the drive system causes (i) the sleeve to move laterally back and forth to oscillate relative to the housing, and (ii) the drive shaft to rotate relative to the housing.

A multi-movement cosmetic assembly includes a housing defining an interior; a drive system disposed within the housing; a sleeve received within the housing; and a drive shaft positioned in the sleeve. The drive system is operably coupled to the sleeve and the drive shaft such that actuation of the drive system causes (i) the sleeve to move laterally back and forth to oscillate relative to the housing, and (ii) the drive shaft to rotate relative to the housing.

A drawing device, including: a drawing head which performs drawing on a drawing target; a head mover which moves the drawing head in a first direction and in a second direction which intersects with the first direction; a cap which protects the drawing head; and a processor which controls the drawing head and the head mover. Within a range where the drawing head is moved by the head mover, a drawing area where the drawing target is placed and the drawing by the drawing head is performed and a stand-by area where the cap is disposed are provided. The drawing head performs the drawing on the drawing target while the processor controls the head mover to move the drawing head in the first direction. The drawing head is protected with the cap by the processor controlling the head mover to move the drawing head to the stand-by area.

A drawing device, including: a drawing head which performs drawing on a drawing target; a head mover which moves the drawing head in a first direction and in a second direction which intersects with the first direction; a cap which protects the drawing head; and a processor which controls the drawing head and the head mover. Within a range where the drawing head is moved by the head mover, a drawing area where the drawing target is placed and the drawing by the drawing head is performed and a stand-by area where the cap is disposed are provided. The drawing head performs the drawing on the drawing target while the processor controls the head mover to move the drawing head in the first direction. The drawing head is protected with the cap by the processor controlling the head mover to move the drawing head to the stand-by area.