Bed, in particular medicinal bed, for example hospital or home care bed, - having a height-adjustable lying surface on which a mattress lies, - having a head part, a foot part and/or at least one side part, which protrude or protrudes at least in one state of the bed beyond the mattress of the bed, - having a motor for the height-adjustment of the lying surface as a means for supporting the standing up, - having a control system for controlling the motor for the height-adjustment, wherein the control system - has at least one sensor, - which has at least one actuating element which can be actuated for the generation of a control signal and - which has an interface for outputting the control signal, - has at least one actuator - which has an interface via which the control signal can be received into the actuator, and - which has a switching element for switching at least one current path or an adjusting element for adjusting at least one voltage, one current or another physical variable on the basis of the received control signal, characterised in that - the sensor has at least one element for producing energy, with which the energy necessary for the generation and transmission of the control signal can be generated from the actuation of the actuating element of the sensor from outside. - having a height-adjustable lying surface on which a mattress lies, - having a head part, a foot part and/or at least one side part, which protrude or protrudes at least in one state of the bed beyond the mattress of the bed, - having a motor for the height-adjustment of the lying surface as a means for supporting the standing up, - having a control system for controlling the motor for the height-adjustment, wherein the control system - has at least one sensor, - which has at least one actuating element which can be actuated for the generation of a control signal and - which has an interface for outputting the control signal, - which has at least one actuating element which can be actuated for the generation of a control signal and - which has an interface for outputting the control signal, - has at least one actuator - which has an interface via which the control signal can be received into the actuator, and - which has a switching element for switching at least one current path or an adjusting element for adjusting at least one voltage, one current or another physical variable on the basis of the received control signal, characterised in that - the sensor has at least one element for producing energy, with which the energy necessary for the generation and transmission of the control signal can be generated from the actuation of the actuating element of the sensor from outside. - which has an interface via which the control signal can be received into the actuator, and - which has a switching element for switching at least one current path or an adjusting element for adjusting at least one voltage, one current or another physical variable on the basis of the received control signal, - the sensor has at least one element for producing energy, with which the energy necessary for the generation and transmission of the control signal can be generated from the actuation of the actuating element of the sensor from outside.