Abstract: An electric shaver having a shaving unit and a sensor with a first sensor unit fixed to a main body and a second sensor unit fixed to a sensor unit carrier, for indicating a distance between the sensor units. The shaving unit and the sensor unit carrier are suspended to the main body for displacement along a z-axis between a rest position and a pushed-in position in response to a pushing force exerted onto a shaving face of the shaver. The first and second sensor units are located in positions offset from the z-axis over a distance (d) in an x-direction. An anti-tilting guide is provided for guiding the sensor unit carrier against tilting about a y-axis.

Abstract: A skin treatment device provides feedback to a user relating to the force or pressure they are applying. In addition to the feedback provided for indicating that the pressure is too high, correct, or too low, there is a further feedback type when the force or pressure is below a lowest threshold value, indicating that there is no contact between the skin and the device. Providing the same feedback information when the user is applying a too low pressure as when the user has deliberately released the device from contact with the skin is thereby avoided.

Abstract: An electric shaver having a shaving unit and a sensor with a first sensor unit fixed to a main body and a second sensor unit fixed to a sensor unit carrier, for indicating a distance between the sensor units. The shaving unit and the sensor unit carrier are suspended to the main body for displacement along a z-axis between a rest position and a pushed-in position in response to a pushing force exerted onto a shaving face of the shaver. The first and second sensor units are located in positions offset from the z-axis over a distance (d) in an x-direction. An anti-tilting guide is provided for guiding the sensor unit carrier against tilting about a y-axis.

Abstract: A personal care device drive unit comprises a main body housing a motor and enabling releasable connection to any selected one of a set of different functional units. A controller of the personal care device drive unit generates an output signal associated with the selected one of the functional units connected to the main body in dependence on a sensed motor current and a sensed vibration occurring in the main body. The use of both vibration sensing and current sensing (which detects the electrical motor load resulting from driving the selected one of the functional units connected to the main body) enables multiple different functional units to be identified more reliably.

Abstract: An electric shaver having a shaving unit (3) and a sensor (15) with a first sensor unit (16) fixed to a main body (2; 202; 302) and a second sensor unit (17) fixed to a sensor unit carrier (22; 222; 322), for indicating a distance between the sensor units (16, 17). The shaving unit (3) and the sensor unit carrier (22; 222; 322) are suspended to the main body (2; 202; 302) for displacement along a z-axis between a rest position (22) and a pushed-in position (22?) in response to a pushing force exerted onto a shaving face (11) of the shaver (1). The first and second sensor units (16, 17) are located in positions offset from the z-axis over a distance (d) in an x-direction. An anti-tilting guide (24-27; 124; 224, 226; 326, 328) is provided for guiding the sensor unit carrier (22; 222; 322) against tilting about a y-axis.