Chun Wei Technology (Shenzhen) Co., Ltd. is a professional research on the development of fire protection products and integration of the enterprise. The company sells the RRD series of fire safety alarm push latch (lock) is in accordance with the "Ministry of Public Security, the State Administration of Work Safety crowded places on the conduct of fire safety evacuation channel security exit the implementation of the special views of governance "(the public [2003] 4) spirit of the document developed, both to facilitate open, evacuation guidelines, fire, theft, and to work with automatic fire, security advanced system features such as door lock linkage system. The locking system can be widely used in movie theaters, cultural, sports, playgrounds, shopping malls, supermarkets, schools, hospitals, hotels, apartments, offices, enterprises and other staff gathered in civil and industrial construction, and has the following significant use features: 
 1, can be installed in various places, various forms of emergency exits, evacuation outside the open door, the door to meet the need to use a variety of evacuation; 
 2, in a variety of emergency situations, to take advantage of people's instinctive action will open the door normally closed to evacuate quickly escape; 
 3, to maximize avoid the darkness, smoke or mess, because can not open the door which led to evacuation of personnel can not escape the danger; 
 4, in emergency situations, through the voice light and sound alarms and escape to play the role of guidelines; 
 5, to achieve Class A fire door fire resistance requirements; 
 6, under normal circumstances, can play a restricted access, burglar alarm or security role, to a certain extent, solve the fire and security doors on the evacuation of the conflict between different requirements; 
 7, with automatic fire, security or access control system combined with the circumstances, to design a variety of self-control door lock system, used to meet the needs of different users. 
 This series of door lock system in accordance with functions divided into four main types: ? No joint action to push the alarm of fire safety latch (lock); ? Linkage to push the alarm of fire safety latch (lock); ? Linkage fire safety alarm delay push the bolt (lock); ? Access to push the alarm of fire safety latch-type (lock). In accordance with the main structure is divided into two types: ? the level of fire safety alarm push bolt type latch (lock) for a single door; ? the level of the lock, the world push the alarm of fire safety bolt latch (lock) for double-door . 
 First, several major security 1, through the national fixed fire extinguishing systems and fire-resistant components of Quality Supervision and Inspection Center of the type test. 2, in line with national standards and the provincial Department of Construction, issued by the provinces where mandatory standards for construction. 3, the perfect after-sales service guarantee. 
 Second, several major features: 1, fire, security balance, so that fire, security is not in conflict. 2, the deterrent alarm and alarm guide. 3, cold warning signs. Chun Wei of Technology Shenzhen Co., Ltd Tel: 15889746318 Manager Zhang QQ: 2 9 5 1 1 8 0 4 2 
 III. Product operation: 
 1) The door lock bar 
 In urgent cases, the pressure pushing arm and push plate, door lock to open the RRD. While the door is opened, built-in alarm immediately start, start the alarm, the use of special keys to reset the alarm. 
 2) the key to open the door 
 Alarm integrated circuit, and directed to issue high-decibel alarm, push bar doors open, the alarm is ringing, until the man canceled.