The connector mainly used for panel furniture was invented by Haifule Furniture Fittings Company in 1970s. Because their name "minifix" was registered as a patent, Heidi Shi Company also invented its own patented three-in-one connector, named "eccentric connector". Therefore, at present, the name "eccentric connector" is adopted abroad. Since it was introduced to China in 1980s, people have named it after the number of accessories: three-in-one connector, two-in-one connector and four-in-one connector.
Three-in-one is composed of three parts: three-in-one is equivalent to the nail-groove falcon structure in traditional carpentry. They are eccentric centers (also known as eccentric nuts, eccentric wheels, eccentric parts, etc. ), connecting rod (bolt) and embedded nut (expansion bolt, commonly known as plastic particles). The advantages of the three-in-one connector are as follows:
1. Embedded nut: special for reinforcement; Connecting rod: special for connection; Eccentricity: solved the locking problem between plates. It is firmly connected by expansion bolt, bolt and eccentric wheel.
2. Three-in-one connection can be disassembled and assembled many times. This is also one of the advantages of panel furniture.
3. hidden. The three-in-one connector is not visible from the outer surface.
4. Three-in-one connection reduces the use of adhesive. More environmentally friendly.