The key has teeth are on one side, double-pole on both sides of all the teeth, a tooth is understood as a binary digit, then the number of digits doubled to break the lock of the difficulty of tens of times.
Classification:
1. Free type gas spring (compression gas spring) only extension (no external force, the longest length) and compression (external force is greater than the thrust of the gas spring, the shortest length) two states, in the stroke can not be stopped on their own, mainly play a supportive role, the type of gas spring has a constant damping and variable damping of two kinds of structures. In the automobile, engineering machinery, textile machinery, printing machinery, office furniture and other industries are widely used.
2. Self-locking gas spring (lift lockable gas spring, angle adjustable lockable gas spring) through its internal valve can be locked in any position of the spring stroke, according to the internal structure of the different types of gas springs have elastic locking, compression rigid locking, stretch rigid locking, compression and stretching of the two-way rigid locking and other types of gas springs. Self-locking gas springs have the function of support, height and angle adjustment at the same time, and the operation is convenient and flexible, simple structure. Thus, it is widely used in medical equipment, furniture, automotive and other industries.
3. Free stopping gas spring (balanced gas spring) through its internal special balance valve mechanism, coupled with a reasonable external load design, the gas spring can be stopped at any position in the stroke, but there is no additional locking force, its characteristics between the free-type gas springs and self-locking type gas spring. Mainly used in kitchen furniture, medical equipment, electronic products and other industries.
4. Traction gas spring (tension gas spring) is a special kind of gas spring: other gas springs in the free state are in the longest position, that is, after being subjected to external forces from the longest position to the shortest position of the movement, while the free state of the traction gas spring is in the shortest position, when subjected to traction from the shortest to the longest run. Traction gas spring in the corresponding free type, self-locking type and other products.
5. Dampers through the piston on the damping structure can make the damping force with the speed of movement and change, can be obviously connected to the speed of the mechanism of the damping effect, the products have a variety of structures to suit different purposes. They are used in automobiles, home appliances, and medical equipment.
Through the understanding, we can know the important role of the spring, but if the spring quality is not good, the impact of the spring is very large, so the spring purchase need to choose the right business.