Specification and size of hardware shrapnel

Common hardware shrapnel mainly have the following three specifications (circular, triangular and cross-shaped): 　　1. Round hardware shrapnel 　　 At present, the size of round hardware shrapnel is mostly between 2.5mm and 5mm. The round series can also be up to 16mm or more, and the strength is generally between 100gf and 600gf. At the same time, sometimes it is possible to customize shrapnels of various specifications and sizes according to customer requirements to meet the different needs of customers. Round metal shrapnel can be divided into dots and no dots, and dots are divided into a dot and a belt. Divided into multiple points (3-5), the existence of pits reduces the occurrence of poor conduction to a certain extent and increases the conduction performance of the product. In addition, for the convenience of design, taking into account the special requirements of the manufacturer, we will add medium rice and three-sided rice to a certain size of the circle to achieve the effect of increasing the height and feel. From the shape of the product, it is a comparison. Regular shape, so in conventional specifications, the life of the round is often longer than that of other specifications of metal shrapnel. 2. The triangular metal shrapnel is the stainless steel metal shrapnel. Its advantage is that it has the greatest strength under the same diameter. It is this series of shrapnels that are larger than 600gf. They are used in special occasions, such as the need to press hard to conduct to avoid artificial Misoperation, etc. The conventional size of this triangular shrapnel is from 5-12mm, and the strength is generally from 150gf to 6000gf. In addition, unlike other models, this shrapnel product can be made with two legs. The angle width is generally 0.8mm, and there are also specifications such as 0.7~1.0mm; the foot length is divided into three types: short feet, 0.8mm long; middle feet: 1.5mm long and long feet: 3.0mm long or longer. Relying on the two corners, it can be easily positioned on the PCB board, eliminating the welding or surface filming process. 　　 3. Cross-shaped hardware shrapnel 　　 is also called four-corner shrapnel, that is, hardware shrapnel with four corners. Mainly used for single and double panels, soft boards and membrane switches, etc. There are two types of cross-shaped shrapnel: no meter position (also called 'point'), with middle meter. In terms of its structure, the cross-shaped shrapnel tends to be higher than other specifications, so it feels better than other specifications. Therefore, when there is more space on the PCB,

You can use this series of shrapnel. Like commonly used membrane switches, most of them use cross-shaped shrapnel. The cruciform series can also be up to 20mm or greater, and the strength is generally between 120 grams force and 600 grams force.　　 In addition, there are other specifications for hardware shrapnel, such as rectangular, irregular polygon and so on.