A. In the fields of machinery and vehicles, metal domes are instruments used for buffering shock-absorbing devices and relay delay devices. Their shapes include rectangular, trapezoidal, triangular, and stage shapes, and their structural types include straight leaf springs and curved leaf springs.
B. In the military and war fields, shrapnel refers to the fragments produced by the metal body or warhead of shells, bombs, etc. after explosion.
C. In the electronics and hardware industry, metal dome, also known as snap dome, is a type of mobile phone component made of stainless steel. It is mainly used in thin film switches, contact switches, PCB boards, FPC boards, medical devices, and other products. The working principle of metal shrapnel is that the metal shrapnel on the thin film button is located in the conductive part of the PCB board. When pressed, the center point of the shrapnel is concave and comes into contact with the circuit on the PCB, forming a circuit. The current passes through, allowing the entire product to work normally.
D. Gold spring pieces belong to hardware stamping parts. In the category of electronic hardware materials, they are made of stainless steel or manganese material after heat treatment and are an important component of switches. With the conductivity of metal spring pieces, they play a high-quality switch role between the operator and the product.