Application and management of hardware shrapnel

Hardware shrapnel 　Hardware shrapnel conductive film PET conductive film Guozi patch (metal dome array), belonging to the category of metal stamping parts and electronic hardware materials. English name: Metal shrapnel. It is made of stainless steel or manganese after heat treatment. It is an important part of the switch. With the help of the conductivity of the metal shrapnel, it can play a high-quality switch between the operator and the product. At the same time, using the stable resilience of the guozi (automatically return after pressing) and long life, it is a piece of PET sheet including metal shrapnel (the guozi), printed on the circuit board used as a switch When the circuit board, FPC, etc. are used, they play an important role as a touch switch between the use and the instrument. Compared with traditional silica gel buttons, the conductive film is multi-polar and has a longer service life, and can also use the indirect development of each type of conductive membrane switch production efficiency. The hardware shrapnel purple patch is located on the circuit board and the conductive part (mostly located above the fingers on the circuit board). When pressed, the center point of the shrapnel is concave and exposed to the circuit on the PCB, thus forming a loop. The current will operate normally after the product. This is how it works. We can make conductive film on the basis of customer's demand (membrane switch) that does not meet the standard.　　The most important data and function-related functions of hardware shrapnel, including conductivity, strength and elasticity coefficient. Reliability is affected by the force of touch pressure (flexibility indication) and corrosion resistance after cutting. Good electrical connectors can be used in machining companies. The function of the product requires alloy forming performance and scale control effect. The main factor related to conductivity is that the electrical connector is trying to transfer current (usually tens of amperes) or trying to transmit electrical signals (usually less than 1 ampere). To be suspicious, and high-conductivity alloys are more advantageous to use to avoid generating a large amount of Joule heat for power transmission, but they can be used for signal transmission when they are lost by the reserved voltage circuit. The positive pressure of an electrical connector that matches the strength and the alloy's attack elastic coefficient touches the touch shrapnel when it is judged. Generally, the pressure can be obtained after bending to achieve the effect of high contact pressure. The positive pressure obtained from the relationship of the elastic arm end (FN) can be expressed as: FN u003d alpha modulus * deflection * alpha stress.