Professional application and planning standards for hardware shrapnel

Hardware shrapnel is a mechanical part that uses elasticity to work. Usually made of metal shrapnel steel. It is used to control the movement of mechanical parts, level shock or shock, store energy, measure the size of force, etc. It is widely used in machinery and appearance. The varieties of hardware shrapnel are messy and diverse. According to the shape, there are mainly spiral hardware shrapnel, scroll hardware shrapnel, and plate hardware shrapnel. Hardware shrapnel is a kind of elastic element widely used in machinery and electronic professions. Hardware shrapnel can produce large elastic deformation when loaded, and convert mechanical work or kinetic energy into deformation energy. After unloading, the deformation of the hardware shrapnel disappears and recovers. In its original state, transforming deformation energy into mechanical work or kinetic energy.　　The standard of metal shrapnel　　1. The size of the round round shrapnel is now concentrated on the smaller end, like 2.5mm-5mm, which are the advantages of this series of shrapnel. The round series can also be up to 16mm or more, and the strength is usually between 100gf and 600gf. At the same time, sometimes we can customize various standard size shrapnels according to customer requests to meet the different needs of customers. Round metal shrapnels are divided into dots and without dots, and dots are divided into dots and dots. With multiple points (3-5), the existence of pits must reduce the occurrence of poor conduction to a certain extent, and add the conduction function of the product. Others are convenient for planning. Taking into account the special requests of membrane switch manufacturers, we will add medium rice and three side meters on the certain standard of the circle to achieve the effect of adding height and feel. The circle is viewed from the shape of the product. , Attributed to the more regular shape, so in the conventional standard, the life of the round is usually higher than the life of other standard metal shrapnel. 2. The advantage of the triangular metal shrapnel (stainless steel shrapnel) is that it can have the greatest strength under the same diameter, like those larger than 600gf and above are the advantages of this series of shrapnel, used in special occasions, such as the need to press hard to guide To prevent manual misoperation, etc. The conventional size of this triangular shrapnel is from 5-12mm, and the strength is usually between 150gf and 6,000gf. In addition, unlike other models, this shrapnel product can be made with two feet. The angle width is usually 0.8mm, and there are also standards such as 0.7~1.0mm; there are three types of foot lengths: short feet , 0.8mm long; middle foot: 1.5mm long and long foot: 3.0mm long or longer. Relying on two corners, it can be easily positioned on the PCB board, eliminating the need for soldering or surface filming. 3. Cross shape The cruciform series of metal shrapnel refers to shrapnel with four legs, also called four-corner shrapnel. It is 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 ‘dot’), with middle meter. In terms of structure, the height of the cross-shaped shrapnel is usually higher than other standards, so the hand feel is better than other standards. Therefore, when there is more space on the PCB, this series of shrapnel can be used. Like commonly used membrane switches, most of them use cross-shaped shrapnel. The cruciform series can also achieve a maximum of 20mm or more, and the strength is usually between 120 grams force and 600 grams force.