Patent ID: 8727391
Filing Date: 2014-05-20
Classification: A47L,D06F,Y10T

Abstract:
1. A safety lock for a door of a household appliance, is composed of a housing on one end of which there is a mechanical assembly of the door lock, on an other end there is an assembly of an electric switch used to reach closed or an interrupted electric circuit, into which also a part of a programme selection switch is included, whereby the assembly of the door lock and the assembly of the electric switch are mutually linked by a slider, which is designed in a way that a lug of the slider engages with a hook of the appliance door, when the hook is in a guide, so that upon manual closing of the appliance door the hook pushes the slider towards the assembly when entering the guide, whereas a spring is foreseen to return the slider to its original position while the appliance door is opening, and on the housing there is a means used to manually switch the electric switch off in case the safety lock or electric installation gets damaged or in case of mains breakdown, wherein on a part of the slider in an area of the assembly there is an opening and an inclination and that the assembly of the electric switch is composed of a switch, of an electromagnetic coil with an axially movable core, of two permanent magnets located at a distance from the ends of the core, whereas a movable contact of the switch engages with the inclination on the slider, so that the movable contact closes the switch when the slider is shifted towards the assembly upon manual closing the appliance door, and the switch is included in the circuit for the indication of openness/closeness of the appliance door together with the programme selection switch, and the movable contact of which is positioned on the holder fixed on the core of the coil, whereas the coil is controlled by DC, the polarisation of which is determined by the programme selection switch depending on the operation of the appliance or termination of operation, and that the core is axially movable by means of the coil and fixed in one or another end positions and adjacent to the adequate permanent magnet even if current is not present in the coil.