In the development of the lock, from ancient times to the present, its functions and characteristics are constantly changing.
There are many types of locks on the market today. As far as door locks are concerned, they are classified into door locks, bedroom locks, passage locks, bathroom locks, etc. according to their purpose; ball locks, handle locks, mortise locks, and deadlocks are classified according to their shapes. The ball lock and the handle lock have three functions: lock, handle, and ball to touch. For deadlocks, an additional door handle must be installed.
①Household door locks: they have the function of insurance safety, so they are also called safety locks or anti-theft locks.
②Passage lock: It acts as a door handle and a bead, and has no insurance function. It is suitable for door locks in kitchens, halls, living rooms, dining rooms, and children's rooms.
③Bathroom lock: The feature is that it can be locked inside and opened with a key outside the door. It is suitable for the toilet or bathroom.
④ Bedroom lock: Lock the insurance inside, and the outside must be opened with a key. It is suitable for bedroom and balcony doors.
The materials used for locks are mainly copper, stainless steel, zinc alloy, steel, aluminum, or aluminum alloy.
①Copper: It is one of the most widely used lock materials. It has good mechanical properties, good corrosion resistance, and processing properties, and the brass padlock has a bright color, especially the copper forged handles and other lock decoration parts. The surface is flat and the density is good. , No pores and trachoma.
②Stainless steel: durable, brighter with more use. It has good strength, strong corrosion-resistance, and unchanged color.
③Zinc alloy material: its strength and rust resistance are poor, and the advantage is that it is easy to make parts with complex patterns, especially pressure casting. The locks of more complex patterns seen in the market are mostly zinc alloy.
④Steel: It has better strength and lower cost. Generally, it is coated into an external coating, but it is easy to rust.
⑤Aluminum or aluminum alloy: Ordinary aluminum alloy (except for aerospace use) is soft and light, with low material strength, but it is easy to form.