What is the better quality of the door lock?

Lock materials on the market are basically divided into stainless steel, copper and zinc alloy. Stainless steel is the best material for making locks because of its high strength, strong corrosion resistance and no discoloration. Copper is universal, with superior mechanical properties and high price; High-quality zinc alloy is durable, corrosion-resistant and easy to form, and is mostly used for mid-range locks.

Second, look at the surface treatment.

Surface treatment can be roughly divided into electroplating, spraying and coloring. Through surface treatment, a dense protective film is formed on the surface of the product, which plays an anti-corrosion and anti-rust role and makes the product more beautiful and durable. At the same time, it is also a standard to measure product quality. The locks with good quality are mostly electroplated, and the coating is fine and smooth, even and moderate, with bright color and no signs of bubbles, corrosion and oxidation.

Third, look at the implementation standards.

Foreign countries have very strict standards for hardware locks, so the quality of imported products is relatively high. At present, the Ministry of Light Industry has used some foreign standards for reference, and revised the original GB to QB with higher requirements. Brand manufacturers are already implementing QB standards, while small manufacturers are still implementing the original GB standards. When purchasing products, we must clearly implement the standards.

Fourth, you can feel the quality of the lock. Generally speaking, locks that feel heavier have higher quality; The lock body can't be exposed, which is easy to hurt people. Pay special attention to the end of the lock handle, the lock tongue and the four corners of the lock body. A lock with a good lock spring has flexible opening, high sensitivity and long service life.

Building locks generally include hand locks, anti-theft and fire locks and electronic ic card locks. Among them, the electronic ic card door lock is not suitable for home use, because the electronic lock is not stronger than the mechanical lock in terms of anti-theft and anti-prying functions, but the price is much more expensive, so it is mainly suitable for hotels, restaurants and other places. Theft-proof and fire-proof door locks are used for security doors and entrance doors in the living room. At present, three-way safety structure is mostly adopted, that is, three locking bolts lock the handle and the upper and lower pins respectively. Pay attention to the material of the lock and the inspection certificate of relevant departments when choosing. Door locks on the market are rich in colors, including gold-plated, titanium-plated, silver-plated and chrome-plated, as well as wood-grained, matte, bronze and precious stones. Any color requires a smooth surface, no spots and no rust. With the meticulous and in-depth development of home decoration, the application of locks is more specific, such as mobile locks used on sliding doors, glass locks used on glass doors, and special anti-collision locks for children's rooms. , but hand locks are widely used. Handle lock is divided into ball lock and handle lock. There is a stainless steel bathroom ball lock, which has waterproof function and is specially designed for the bathroom. After entering the bathroom, press the hand-held safety button on the indoor side and the door will be locked. The most important thing is the quality of the lock. When you choose locks, you should try to buy products with high brand awareness, because there is a problem of mutual opening rate. Mutual opening rate refers to the mutual opening rate of locks and keys. The fewer locks a key opens, the stronger the security and reliability of this lock. At present, the mutual opening rate of locks of world-famous brands is only one in ten thousand, that of excellent domestic brands is about one in six thousand, and that of products produced by some informal lock factories without production strength is one in thirty. The security and reliability of such a lock are too poor. Although the price of a good brand product is slightly higher, the quality of the lock is guaranteed and it is worthwhile. If you still want to choose a low-priced product, you can try to choose a lock with more teeth, because the more teeth there are in the key, the greater the difference and the lower the mutual opening rate of the locks. From the durability of locks, the best material should be stainless steel, especially as a surface material. The more you use, the brighter it will be. Good strength, strong corrosion resistance and unchanged color. But there are many kinds of stainless steel, which can be mainly divided into ferrite and austenite. Ferritic stainless steel is magnetic, commonly known as stainless iron. After a long time, the environment will rust. Only austenitic stainless steel will not rust. The identification method is simple. You can identify it with a magnet. Copper lock is one of the most widely used lock materials, which has good mechanical properties, good corrosion resistance and machinability, bright color, especially the decorative parts of locks such as copper forged lock handles, with flat surface, good compactness and no air holes and sand holes. It is strong and rust-proof, and can be used for various surface treatments such as plating 24K gold or placer gold. Bronze locks are resplendent, noble and generous, adding a lot of color to people's homes. The strength and rust-proof ability of zinc alloy lock are much worse, but its advantage is that it is easy to manufacture parts with complex patterns, especially die casting. The locks with complex patterns seen in the market are probably made of zinc alloy, so consumers should carefully identify them.