Springs are widely used in different industries, such as in automobile engines, internal combustion engines, clutches are used in springs, our daily life ballpoint pens, clocks, electrical appliances, toys, etc. have the use of springs, in the spring to receive pressure, springs can be divided into tension springs, compression springs, torsion springs and stainless steel springs. If according to the shape can be divided into butterfly spring, drum spring, vortex spring, spring spring, etc., the classification of springs is many, take carbon cable spring wire as an example, its diameter is generally required B grade: 0.08 ~ 13.0 C grade: 0.08 ~ 13.0 D grade 0.08 ~ 6.0, generally used at -40 ~ 130 temperature, high elasticity and good performance is the main characteristics of carbon spring steel wire.

Dongguan Spring Spring Electronics Co., Ltd. (SiS) was established in October 2011, specializing in the design, testing and manufacturing of elastic conductive electronic components, and moved to Chang'an Town, Dongguan in May 2018. The company has CNC lathe workshop, finger workshop, assembly workshop, laboratory. Based on the increasingly high requirements of the connector industry for high-current connectors, spring in the spring electronics has developed a new type of bidirectional coil spring finger (SiS®), single-turn spring finger, Constitute multiple columnar deformation contact points (up to 300 points or more). It can meet the service life of more than 100,000 times, the spring contact current density and temperature rise are close to the transmission cable, and the plugging force is about 10N. PCB board connectors (board-to-board USC, board-to-wire), cylindrical quick-swappable self-locking connectors (plastic and metal shells), male and female weight-load connectors, electric vehicle chargers, high-voltage power battery pack series connectors, used in Z advanced high-current energy collectors, energy storage and electrical equipment, such as: electric vehicles, charging base stations, wind energy generators, power supplies, high-speed rail, heavy trucks, etc. The company has a number of national patents, and the products have passed international standard testing.