Abstract: An oral-care implement has a handle containing an electric battery and a motor. The motor's shaft is connected to a motion transmitter to drive a treatment head having at least one functional element. The implement has a pressure-control system including a microcontroller configured to detect a stimulus to energize the motor, set a baseline current, and repeatedly execute an overpressure-detection control loop comprising: measuring an instantaneous current draw, adding an increment value to or subtract a decrement value from the baseline current, thereby generating a dynamically adjusted baseline current, determining whether a difference between the instantaneous current draw and the dynamically adjusted baseline current exceeds a threshold, thereby detecting an occurrence of overpressure, and causing the implement to perform a corrective action in response to the detected overpressure.

Abstract: A method for controlling overpressure in an electric oral-care implement having a treatment head with at least one functional element driven by a motor. The method includes detecting a stimulus to energize the motor, setting a baseline current, and repeatedly execute an overpressure-detection control loop, said loop including measuring the motor's instantaneous current draw, adding an increment value to the baseline current or subtracting a decrement value from the baseline current thereby generating a dynamically adjusted baseline current, determining whether a difference between the instantaneous current draw and the dynamically adjusted baseline current exceeds a threshold thereby detecting an occurrence of overpressure, and performing a corrective action in response to the detected occurrence of overpressure.

Abstract: A charger for wireless energy transfer to a personal care device has a travel mode and an internal energy storage, a sensor for detecting a change of position of the charger, and a processor coupled with the sensor for receiving sensor signals relating to a detected change of position of the charger.

Abstract: A motor unit having a motor having a stator and an armature, the armature being arranged for relative driven motion with respect to the stator. A motor control unit has a supply circuit for providing a supply voltage at the motor to provide a set power level to the motor for driving the armature into motion. A measurement circuit is measuring a value of a physical variable indicative of a current flow through the motor, The motor control unit is arranged to interrupt the provision of the supply voltage by the supply circuit and to dynamically brake the motor during a braking time interval and further to measure the value of the physical variable during the braking time interval.

Abstract: A personal-care device has a rechargeable energy storage, a charging circuit for receiving energy from an external energy source and for charging the rechargeable energy storage, a first charging mode in which the rechargeable energy storage is charged to a predetermined maximum voltage value, and a user-selectable second charging mode in which the rechargeable energy storage is charged until the voltage at the rechargeable energy source has reached a first predetermined voltage value that is lower than the predetermined maximum voltage value. The present disclosure is also concerned with a system having such a personal-care device and a charger.

Abstract: The present invention relates to the field of a small electrical appliance, in particular hair removal device or toothbrush, comprising an electric DC motor; a detector for acquiring a detector signal indicative of a rotational speed of the electric DC motor; and a controller for controlling the electric DC motor. The controller is adapted to: determine, based on the detector signal, a first parameter indicative of the rotational speed of the DC motor; determine, based on the detector signal, a second parameter indicative of the rotational speed of the DC motor, wherein the second parameter is different from the first parameter, and wherein the second parameter is determined based on a frequency domain analysis of the detector signal; and adjust a supply voltage of the electric DC motor based on the first parameter and the second parameter.

Abstract: The present invention relates to the field of battery powered electrical appliances or personal hygiene, in particular to a hair removal device such as an electric shaver or epilator as well as an electric toothbrush. A control device for a battery powered electrical appliance for personal hygiene is described, wherein the control device is adapted to cause the battery powered electrical appliance to perform automated contact fritting of a battery contact by controlling the battery powered electrical appliance such that a current pulse exceeding a wetting threshold is applied across the battery contact during a standby period.

Abstract: A motor unit having a motor having a stator and an armature, the armature being arranged for relative driven motion with respect to the stator. A motor control unit has a supply circuit for providing a supply voltage at the motor to provide a set power level to the motor for driving the armature into motion. A measurement circuit is measuring a value of a physical variable indicative of a current flow through the motor, The motor control unit is arranged to interrupt the provision of the supply voltage by the supply circuit and to dynamically brake the motor during a braking time interval and further to measure the value of the physical variable during the braking time interval.

Abstract: A charger for charging a rechargeable energy source of a personal care device has a housing having a charging region for positioning the personal care device, a circuit for performing a charging procedure of the rechargeable energy source of the personal care device, a motion sensor for detecting a motion of at least a portion of the charger, preferably wherein the charger comprises a motion enhancer, a controller coupled with the charging circuit and the motion sensor. The controller is arranged to activate the charging circuit when the controller receives a motion signal from the motion sensor indicating a placement of the personal care device in the charging region and/or to deactivate the charging circuit when the controller receives a motion signal from the motion sensor indicating a removal of the personal care device from the charging region.

Abstract: The present invention relates to the field of battery powered electrical appliances or personal hygiene, in particular to a hair removal device such as an electric shaver or epilator as well as an electric toothbrush. A control device for a battery powered electrical appliance for personal hygiene is described, wherein the control device is adapted to cause the battery powered electrical appliance to perform automated contact fritting of a battery contact by controlling the battery powered electrical appliance such that a current pulse exceeding a wetting threshold is applied across the battery contact during a standby period.

Abstract: A circuit arrangement for protection against an undue overheating of a charging control, discharging control and/or a secondary battery is disclosed, the circuit arrangement comprising the secondary battery, the charging and/or discharging control for charging and/or discharging the secondary battery, a connector for connecting the charging and discharging control to an external power supply, at least one current limiting electronic component arranged in electrical connection to the charging and/or discharging control and optionally, a switchable load.

Abstract: A skin treatment apparatus, preferably an epilator, comprising at least one detector for detecting approximation and/or contact with the skin and a control unit to actuate the device depending on the signal received from the detector. The control unit has at least one regulator which increases the speed of the drive unit upon detection of an increased resistance and/or current consumption by a sensor and/or decreases the speed of the drive unit upon detection of an decreased resistance and/or current consumption by a sensor.

Abstract: An electrical circuit for charging a secondary battery that comprises a dc-converter and an output connector that can be connected to the positive terminal of the secondary battery for applying a charging current to the secondary battery. The dc-converter has a voltage feedback connector for sensing a feedback voltage, wherein the dc-converter is adapted to regulate the output voltage by adjusting the output current at the output connector depending on the sensed feedback voltage and a feedback-sub-circuit connected to the output connector and to the voltage feedback connector of the dc-converter.

Abstract: A personal hygiene device has a resonant motor and a motor control unit for applying a periodic voltage signal with a driving frequency at the resonant motor for driving the resonant motor into an oscillating motion with an oscillating frequency equal to the driving frequency. The motor control unit comprises a synthesizer circuit for digitally synthesizing the periodic voltage signal from voltage pulses of variable length provided with a pulse frequency higher than the driving frequency such that at least two voltage pulses are applied at least in one of two half cycles of each period of the periodic voltage signal.

Abstract: A connector is disclosed comprising at least one contact clip. The contact clip comprises an electrically conductive substrate having a longitudinal axis, a first terminal located at a first end of the substrate, wherein the first terminal comprises at least two contact tongues between which a longitudinal slot is formed, which contact tongues are elastically deformable with respect to each other in a first direction which is perpendicular to the longitudinal axis, and a second terminal located at a second end of the substrate. The connector may further comprise a chassis and a PCB. In addition, a device comprising an energy consumer, an electrical energy source, a PCB and at least one connector is disclosed.

Abstract: An electronic circuit and method for measuring currents during charging and discharging of a secondary battery are disclosed having a secondary battery, at least one shunt for determining the electrical current during charging and/or discharging of the secondary battery by measuring the voltage drop over the shunt, a switchable electrical load, two connectors for connecting a preferably switchable power supply to the electronic circuit for charging the secondary battery and a voltage measuring device.

Abstract: A personal hygiene device has a resonant motor and a motor control unit for applying a periodic voltage signal with a driving frequency at the resonant motor for driving the resonant motor into an oscillating motion with an oscillating frequency equal to the driving frequency. The motor control unit comprises a synthesizer circuit for digitally synthesizing the periodic voltage signal from voltage pulses of variable length provided with a pulse frequency higher than the driving frequency such that at least two voltage pulses are applied at least in one of two half cycles of each period of the periodic voltage signal.

Abstract: An electrical circuit for charging a secondary battery that comprises a dc-converter and an output connector that can be connected to the positive terminal of the secondary battery for applying a charging current to the secondary battery. The dc-converter has a voltage feedback connector for sensing a feedback voltage, wherein the dc-converter is adapted to regulate the output voltage by adjusting the output current at the output connector depending on the sensed feedback voltage and a feedback-sub-circuit connected to the output connector and to the voltage feedback connector of the dc-converter.

Abstract: A method for controlling a charging device transferring energy to an electrical load of an inductively coupled household appliance. The circuitry of the device includes an oscillator circuit having at least one output power coil element and one capacitor element; an electrical power source; a power-switching element feeding the oscillator circuit with electrical power; a sensor element for determining an electrical signal value indicative of the inductance of the oscillator circuit; and a microprocessor configured to adapt the electrical energy provided by the oscillator circuit dependent on a comparison of the measured electrical signal with a threshold. The method includes the steps of activating a threshold determining mode of the microprocessor starting upon the proximate powering up of the microprocessor and determining the threshold automatically after the proximate powering up of the microprocessor.

Abstract: A connector is disclosed comprising at least one contact clip. The contact clip comprises an electrically conductive substrate having a longitudinal axis, a first terminal located at a first end of the substrate, wherein the first terminal comprises at least two contact tongues between which a longitudinal slot is formed, which contact tongues are elastically deformable with respect to each other in a first direction which is perpendicular to the longitudinal axis, and a second terminal located at a second end of the substrate. The connector may further comprise a chassis and a PCB. In addition, a device comprising an energy consumer, an electrical energy source, a PCB and at least one connector is disclosed.