Tips for China Labor Insurance Network - According to the structure of the lock, it can be divided into the following forms:
1 marble structure: a set of basic cylindrical parts to lock or release the structure of the lock core.
2 blade structure: a set of parts in the shape of a piece, which is used to lock or release the structure of the lock core.
3 Magnetic structure: The parts made of magnetic materials are used to lock the structure.
4 password structure: a structure consisting of digital codes.
5 electronic coding structure: the structure composed of electronic principle coding.
In addition, for the door lock, the shape of the lock tongue has a square tongue, a slanted tongue, a knuckle, etc., and the number of the lock tongue is divided into a single tongue and a double tongue; according to the number of locks, it is divided into a single head lock (an outdoor key switch) and a double Head lock (key switch for both indoor and outdoor). The tongue can be freely retractable and called the live tongue. It is mostly inclined and rounded for the door to open. It is used to lock the door with a key or a knob. It is mainly used for locking the door, also called the static tongue.
According to the safety device, the door lock is divided into three types: single insurance, double insurance and three insurance. The role of lock insurance is three types: lock tongue insurance, indoor insurance, and outdoor insurance. The three types are called three insurance.
1 marble structure: a set of basic cylindrical parts to lock or release the structure of the lock core.
2 blade structure: a set of parts in the shape of a piece, which is used to lock or release the structure of the lock core.
3 Magnetic structure: The parts made of magnetic materials are used to lock the structure.
4 password structure: a structure consisting of digital codes.
5 electronic coding structure: the structure composed of electronic principle coding.
In addition, for the door lock, the shape of the lock tongue has a square tongue, a slanted tongue, a knuckle, etc., and the number of the lock tongue is divided into a single tongue and a double tongue; according to the number of locks, it is divided into a single head lock (an outdoor key switch) and a double Head lock (key switch for both indoor and outdoor). The tongue can be freely retractable and called the live tongue. It is mostly inclined and rounded for the door to open. It is used to lock the door with a key or a knob. It is mainly used for locking the door, also called the static tongue.
According to the safety device, the door lock is divided into three types: single insurance, double insurance and three insurance. The role of lock insurance is three types: lock tongue insurance, indoor insurance, and outdoor insurance. The three types are called three insurance.
1.Application scope: Used for threaded joints between thin metal (aluminum, copper) parts and thicker metal parts (main body), wood panels, wall surfaces, etc.. Must be used with the corresponding specifications, slot type Screw spigot with.
2. Reference standard
Pan head cross slot GB845, ISO7049
Countersunk head cross slot GB846, ISO7050
Umbrella head cross slot GB847, ISO7051
Japanese JISB1125 and American ANSI/ASME B18.6.4 have various head types.
3. head type: the same as the head type of self-tapping nails. New and old national standards have three head types: the old national standard for round head (R), countersunk head (F) and half countersunk head (O), the new national standard has a pan head (P), countersunk head (F) and half countersunk head (O). American machine Screws have a variety of head types, in addition to the commonly used pan head, countersunk head, half countersunk head in addition to large flat head, hexagonal Washer head, Warwick head, etc.
(3), tooth type: generally common A teeth and AB teeth. The new version of the IFI standard has been eliminated A tooth products, but due to market needs, some companies are also producing A tooth products, more domestic with A tooth. A tooth AB tooth products are mainly different in the number of teeth, generally speaking, A tooth for coarse teeth, AB tooth for fine teeth, but A tooth and AB tooth products also have differences in tooth outside diameter and head diameter size.
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