Car elevator for carrying and transporting personnel and supplies box-shaped space. General car by car at the end, the car wall, car top, car doors and other major components, its internal net height should be at least 2m. Elevator car is used to carry passengers or cargo and other loads of car body parts. Ceiling usually mirror stainless steel; car bottom of 2mm thick PVC marbling or 20mm thick marble mosaic. Car frame (frame sedan car frame) is a load-bearing structure of the car, the car's load (weight and load) passed by it to the hoisting rope. When the safety gear or squat buffer hit bottom, but also bear the resulting reaction force, so the car frame to have sufficient strength. Car frame generally consists of the beams, columns, beams and bottom brace (adjust the level of the bottom of the car to prevent the floor pour Alice) and other components. The car body is a closed space forming a car trunks, in addition to the necessary entrances and vents and other openings shall not have (a small part of the national security requirements of the car roof open window), the car body by non-flammable and does not produce harmful gases and smoke material composition. For occupant safety and comfort, the car entrance and interior clear height not less than 2 meters. In order to prevent the occupant caused by excessive overloading, the effective area of ??the car must be restricted. See GB7588-2003 specific provisions of the corresponding maximum rated load and the effective area of ??the car. In order to ensure that no passenger elevator overcrowding, the standard also specifies the minimum effective area of ??the car. The floor of the car body is generally by car (sedan bottom car platform; platform), the car walls (car wall car enclosures; car walls), the top of the car (car top car roof). Compartment devices generally have a control box (inside car steering device), ventilation, lighting, emergency lighting, alarm and communication devices. Weighing devices are generally located in the car at the end, there are a few in the car roof beams or rope on board. The basic structure is mounted on the bottom beam of several micro-switches (contacts) or weight sensors, active when the car is placed on the elastic pad load increases due to the downward displacement, touch micro switch sends a signal emitted by the sensor or the load corresponding to the continuous signal. The most basic one switch, overload (more than 10% of the rated load) when the action, not the elevator doors closed, the elevator can not start, but audible and light signals (some no light signal). So also known as overload switch.