Abstract: An electric toothbrush having bristle driven pulsation includes a brush head having a bristle holder and bristle tufts attached to the bristle holder. The bristle tufts and corresponding bristles are disposed at a perpendicular and/or a non-perpendicular angle with respect to a mounting surface of the brush head. The electric toothbrush also includes an electric toothbrush handle removably attached to the brush head. The electric toothbrush handle includes a linear motor configured to drive the bristle holder via a gearing structure coupled to the linear motor and the bristle holder. The linear motor causes the bristle holder to rotate clockwise and counterclockwise at a rotation frequency which exceeds a rotation frequency threshold (e.g., 100 Hz, 120 Hz, etc.). The linear motor also causes the brush head to vibrate in a direction toward and away from a contact surface in synchronization with the rotation of the bristles.

Abstract: A coupling section for coupling a handle of a personal-care implement and a replaceable attachment tool includes a drive shaft having a free end terminating in a bushing; a first magnetic coupling element mounted adjacent to the bushing; a tolerance-compensation element having a through-hole sized to receive the drive shaft therethrough and mounted adjacent to the bushing. The free end of the drive shaft is disposed in the bushing so that there is a space between an inner surface of the bushing and an outer surface of the drive shaft's portion disposed therein, so that a position of the drive shaft can be adjusted inside the bushing during assembly. The tolerance-compensation element, which at least partially encircles the drive shaft, is affixed to the drive shaft and to the bushing. A handle of the personal-care implement and a process of making the handle are also disclosed.

Abstract: An electric toothbrush having bristle driven pulsation includes a brush head having a bristle holder and bristle tufts attached to the bristle holder. The bristle tufts and corresponding bristles are disposed at a perpendicular and/or a non-perpendicular angle with respect to a mounting surface of the brush head. The electric toothbrush also includes an electric toothbrush handle removably attached to the brush head. The electric toothbrush handle includes a linear motor configured to drive the bristle holder via a gearing structure coupled to the linear motor and the bristle holder. The linear motor causes the bristle holder to rotate clockwise and counterclockwise at a rotation frequency which exceeds a rotation frequency threshold (e.g., 100 Hz, 120 Hz, etc.). The linear motor also causes the brush head to vibrate in a direction toward and away from a contact surface in synchronization with the rotation of the bristles.

Abstract: The present disclosure is concerned with a motion converter structured for converting a rotational motion provided by a motor shaft into a linear reciprocating motion of a drive shaft.

Abstract: A toothbrush head or a brush carrier having at least one carrier element including at least one shape-shifting tuft mounted thereon. The shape-shifting tuft raises from a mounting end on a mounting surface of the carrier element generally along an extension direction towards a free end of the shape-shifting tuft. The shape-shifting tuft has a length from the mounting base to the free end and comprises a plurality of fibers.

Abstract: A cleaning element carrier for a toothbrush in a form of a disk has a back surface including a central depression covering at least 70% of the back surface and forming an edge at the border. The carrier's front surface includes at least one protrusion so that the front surface comprises two levels, wherein the area covered by the depression is larger than the area covered by the protrusion.

Abstract: A method for manufacturing a toothbrush head or a part thereof comprises steps of providing a plurality of bristle tufts; providing a hole perforation plate comprising a front surface, a back surface, a thickness therebetween, and a plurality of holes grouped into a plurality of hole arrangements, wherein the front surface is uneven in an area of the hole arrangement; pushing the bristle tufts through the holes; and fusing ends of the bristle tufts at the back surface of the plate by application of thermal energy, thereby forming a plurality of fuse balls that are larger than the holes of the plate; and mounting the plate with the plurality of bristle tufts into a brush head.

Abstract: A hole perforation plate has a front surface, a back surface, a thickness therebetween, and a plurality of holes, grouped into more than one arrangement of holes, wherein the more than one arrangement of holes can be identical or different compared to one another regarding the number of the holes, the shape of the holes, the size of the holes, the distance between the holes, the arrangement of the holes, and a combination thereof.

Abstract: A hole perforation plate (60) has a front surface (61), a back surface (62), a thickness (D) therebetween, and a plurality of holes (70), grouped into more than one arrangement (65) of holes (70), wherein the more than one arrangement (65) of holes (70) can be identical or different compared to one another regarding the number of the holes (70), the shape of the holes (70), the size of the holes (70), the distance between the holes (70), the arrangement of the holes (70), and a combination thereof, and wherein the front surface (61) is uneven in the area of the arrangement (65) of the holes (70).

Abstract: A drive unit for converting a rotational motion into a linear reciprocating motion includes a motor shaft extension having at least a first eccentric shaft element moving in a circle around the motor shaft's longitudinal axis and in a plane perpendicular thereto and at least one elastically deformable unit having a coupling element for coupling with a driven element. The first eccentric shaft element is coupled with the deformable unit to periodically deform the deformable unit so that a longitudinal position of the motor shaft of the coupling element of the deformable unit periodically changes. The deformable unit has a first arm section and a second arm section, each having a first end and a second end. The second end of the first arm section is connected to the first end of the second arm section, wherein the first end of the first arm section is connected to a mounting structure fixed relative to the motor.

Abstract: A toothbrush head or a brush carrier having at least one carrier element including at least one shape-shifting tuft mounted thereon. The shape-shifting tuft raises from a mounting end on a mounting surface of the carrier element generally along an extension direction towards a free end of the shape-shifting tuft. The shape-shifting tuft has a length from the mounting base to the free end and comprises a plurality of fibers.