Cordless electrical appliances

摘要

A cordless electrical appliance comprises an appliance part comprising at least two functional components (T1, M1) and a base for supplying electrical power to the appliance part. A cordless electrical connector (6) makes electrical connection between the appliance part and the base part in use. Both of the functional components (T1, M1) are connected between a pair of electrical connections provided by the connector (6) and arranged such that at least one of the functional components (T1, M1) is selectively energised in response to a change in the relative polarities of the two electrical connections. A switch such as a diode (D1) may be provided between the two functional components (T1, M1), so as to switch ON or OFF the current to a functional component (T1, M1) depending on the polarity of the connections.

主权项

1. A cordless electrical appliance comprising:
an appliance comprising at least a first and a second electrical functional component, each of the first and second functional components being selected from: a heater, a sensor, an illuminating device, a liquid pump, a motor, a display, a sound emitter or a microcontroller; a base for supplying electrical power to the appliance; and a cordless electrical connector for making electrical connection between the appliance and the base in use; wherein both the first and second functional components are connected electrically in parallel in a circuit between a pair of two electrical connections provided by the connector; and a unidirectional switch device is provided in the circuit between the first and second functional components, the unidirectional switch device being arranged to switch ON or OFF depending on the relative polarities of the two electrical connections such that which of the functional components is energized depends on the relative polarities of the two electrical connections; and wherein one of the base or the appliance comprises a control device comprising an electronic control unit to control the relative polarities of the two electrical connections.