A hair cutting appliance comprises an external cutting member and an internal cutting member arranged rotatable to the external cutting member for cutting hair. The internal cutting member is driven via a first coupling element by a drive spindle (24) rotatable about an axis of rotation (35) and having a first spindle part (26) arranged to be driven by a drive, and a second spindle part (30) arranged to be coupled to the internal cutting member, the first and second spindle parts (26, 30) being displaceable relative to each other in an axial direction parallel to the axis of rotation (35); wherein the second spindle part (30) comprises a second coupling element (34) which is coupled to the first coupling element for transmitting, during operation, a driving torque about the axis of rotation (35) from the drive spindle (24, 24a) to the internal cutting member; wherein one of the first and second spindle parts (26, 30) comprises an abutment element (36) and the other of the first and second spindle parts (26, 30) comprises an abutment surface (38) arranged to cooperate with the abutment element (36) for transmitting, during operation, the driving torque from the first spindle part (26) to the second spindle part (30); wherein the abutment surface (38) is arranged at an angle α relative to a tangential direction relative to the axis of rotation (35), wherein 0°<α<90° such that a transmission of the driving torque from the first spindle part (26) to the second spindle part (30) via the abutment element (36) and the abutment surface (38) results in a force exerted by the first spindle part (26) on the second spindle part (28) having a component parallel to the axis of rotation (35) and directed towards the internal cutting member, wherein the first and second coupling elements are configured to transmit the component from the second spindle part (30) to the second coupling element (34).

A self-aligning coupling linkage for a drive train, of a hair cutting appliance having a driving shaft and a non-aligning output shaft, includes a joint section having first and second connector portions that are configured to engage one another for torque transmission. The first second connector portions define a male connector having an external polygonal profile, viewed in a cross-sectional plane perpendicular to a longitudinal axis, and a female connector having an internal engagement profile. The male and female connectors are arranged in a self-aligning fashion for angular offset compensation, where wherein at least one of the male and female connectors is provided with at least one circumferentially arranged deflectable compensation element configured to urge the male and female connectors towards a centered alignment.

A self-aligning coupling linkage for a drive train, of a hair cutting appliance having a driving shaft and a non-aligning output shaft, includes a joint section having first and second connector portions that are configured to engage one another for torque transmission. The first second connector portions define a male connector having an external polygonal profile, viewed in a cross-sectional plane perpendicular to a longitudinal axis, and a female connector having an internal engagement profile. The male and female connectors are arranged in a self-aligning fashion for angular offset compensation, where wherein at least one of the male and female connectors is provided with at least one circumferentially arranged deflectable compensation element configured to urge the male and female connectors towards a centered alignment.

The present invention relates to electric shavers, handpieces of such shavers and a method of manufacturing such electric shavers. More particularly, the present invention relates to a shaver set comprising a plurality of electric shavers.

A hair clipper configured for enhanced user visibility is provided, including a clipper housing defining a longitudinal axis and a cutting end, a clipper bladeset operationally connected to the cutting end and including a stationary blade and a moving blade configured for reciprocating laterally relative to the stationary blade, a drive system projecting from the cutting end and operationally connected to the bladeset for reciprocating the moving blade relative to the stationary blade, at least one bladeset pivot support projecting from the cutting end and connected to the bladeset; the pivot support defining a pivot axis extending transverse to the longitudinal axis.

A hair clipper with blade angle adjustment is provided, including a clipper housing defining a longitudinal axis and a cutting end, a clipper bladeset operationally connected to the cutting end and including a stationary blade and a moving blade configured for reciprocating laterally relative to the stationary blade. A cam follower is connected to the bladeset and associated with the clipper housing for rotation about a rotation axis relative to the clipper housing, and a bladeset angle control is associated with the clipper housing. A power transmission is member associated with the clipper housing, connected to the cam follower and constructed and arranged so that user manipulation of the bladeset angle control causes linear movement of the power transmission member and associated angular movement of the bladeset through rotation of the cam follower.

In an electric handheld hair trimmer and method of operating the same, at least one of a first blade and a second blade of a blade assembly is operatively connected to a motor for driven movement in a working direction. A displacement mechanism is operable to selectively displace at least one of the first blade and the second blade independent of operation of the motor. The displacement mechanism includes at least one of an actuator or a separator. The actuator is movable along the longitudinal axis relative to the body and operatively connected to the second blade to selectively move the second blade along the longitudinal axis relative to the first blade independent of operation of the motor. The separator is operable independently of the motor and is positionable between the first blade and the second blade to at least in part separate the first blade from the second blade.

In an electric handheld hair trimmer and method of operating the same, at least one of a first blade and a second blade of a blade assembly is operatively connected to a motor for driven movement in a working direction. A displacement mechanism is operable to selectively displace at least one of the first blade and the second blade independent of operation of the motor. The displacement mechanism includes at least one of an actuator or a separator. The actuator is movable along the longitudinal axis relative to the body and operatively connected to the second blade to selectively move the second blade along the longitudinal axis relative to the first blade independent of operation of the motor. The separator is operable independently of the motor and is positionable between the first blade and the second blade to at least in part separate the first blade from the second blade.

The present invention relates to the field of small electrical appliances such as battery powered electrical appliances for personal hygiene, in particular to a hair removal device such as an electric shaver or epilator as well as an electric toothbrush. The small electrical appliance comprises an electric load, wherein the electric load heats up during operation; a measuring circuitry for measuring an electrical parameter of the electric load; a temperature sensor arranged spatially separated from the electric load; and control circuitry adapted to protect the electric load from overheating by controlling the electric load based on the electrical parameter of the electric load and an output of the temperature sensor.

The present invention relates to the field of small electrical appliances such as battery powered electrical appliances for personal hygiene, in particular to a hair removal device such as an electric shaver or epilator as well as an electric toothbrush. The small electrical appliance comprises an electric load, wherein the electric load heats up during operation; a measuring circuitry for measuring an electrical parameter of the electric load; a temperature sensor arranged spatially separated from the electric load; and control circuitry adapted to protect the electric load from overheating by controlling the electric load based on the electrical parameter of the electric load and an output of the temperature sensor.