Here a brief exterior door locks of the kinds and structure of the switch cabinet.
So-called external switch cabinets lock, lock installed on the surface of the door is locked. It generally applies to buildings outside the door, the outer door of the House, or on the door of the Office. Species respectively, single lock, double tongue locks (or locks) and the double lock (commonly known as Tiger lock). Single and double tongue or tongues in motion horizontally and double buckle (Tiger) locks the bolt when the movement is vertical.
Exterior structure is generally divided into single lock lock lock, double lock, the main difference between them:
A Monolock head. External keys, door handle (or knob) turned on. It has a strong outside, door operation, without key, especially for fire and other emergencies. However, the as long as someone is at the door, the door can open at any time. Ball-type switch cabinet locks.
Second, double locks. Door, door keys, its confidentiality higher than a single lock, after thieves inside without the key cannot be opened, in addition, most also have defensive functions, as long as there is no key lock bolt indented, with General tools, such as screwdrivers, pliers, hammers, locks cannot be removed. But unfortunately in emergency operation without a single lock, easily The One With All The Haste led to the opportunity; in double lock, because the latch when oriented vertically, therefore, bolt is generally cylindrical, bolt stretched out or indents using the key or knob, therefore, bolt structure formed from touch and non-touch function. Electronic code switch cabinet lock
This which, since touch function for: cylindrical lock tongue Shang with cant, as long as lock body and lock buckle Board a met, lock tongue will will hook live, commonly known as since touch, at door outside must to with key to opened, door within is with spin or key for lock closed or opened; since touch function lock body in the General are with insurance button, dang need door mask Shang and not lock closed Shi, is must put insurance Niu Suo Shang, makes lock surface oblique tongue not out, door to free switch, door outside not with key, to wants to door is impossible of.
Non-touch functions: cylindrical bolt without a slant when only the bolt after the indents, shut the door, and then with the knob or key lock when the bolt extends, the door cannot close the lock without the insurance button, door needs key switches, door knob or key switch.