Introduction to common problems of side key touch switch
Release time：2018-11-01 Clicks： Click
Some of the common problems when the side button taps the switch, we all want to clearly understand these problems, the specific details will be described in detail below.
The common problems of touch switch with side button mainly include hand feeling, adhesion, cover falling off, light pressing not conducting, high resistance value, and pressing not moving after furnace. Here are the six common problems of the side key touch switch and the precautions and solutions.
One, the feeling of hand
A large number of customers have been reacting, many suppliers sent samples feel very consistent, but to mass production feel is not the same. In fact, this problem is very common, we all know that the switch feel and button force are controlled by shrapnel. We often say that the shrapnel is divided into phosphorus-copper shrapnel and stainless steel shrapnel. At present, most manufacturers basically choose phosphorus-copper shrapnel in order to save cost. Because of the high price performance of phosphorus-copper shrapnel, this is also the reason why it is widely used. But the phosphorus-copper fragments will change after the furnace temperature, shrinkage is more serious, which will lead to poor feel. The use of stainless steel shrapnel will not have this problem, but the cost of stainless steel shrapnel is relatively high, resulting in many manufacturers take the risk of choosing phosphorus copper shrapnel, so in the purchase of light touch switch must ask the next question.
Ultra-thin light-touch switches are commonly referred to as thin-film switches. Thin switches require thin-film cooperation in order to be truly thin. However, many films have poor temperature resistance and will fall off after the furnace. The adhesion of our professional terms, in fact, is the film viscosity, imported PI film very good control of this point, its adhesion is 400g, very consistent with the use of switches, how often too light will fall off, if too heavy switch will not move, many manufacturers in order to save costs to choose cheap domestic PI film, the switch is very easy There is a problem of adhesion. It is recommended that you consult the manufacturer before buying. The same is true of the tap switch. If you use imported rubber to point out the point is very easy to fall off, if you use domestic then your problem will come. A penny for a piece of goods, we suggest that you choose a high quality manufacturers, give yourself a choice to satisfy manufacturers.
Three, the lid off
In the production process, there will be a customer response switch lid will leak phenomenon. How does a good switch cover come off? First of all, we need to understand the structure of the switch, the switch cover is on the back cover, this is the constant production process. Familiars will find that the lid is fixed by four riveting points above the base, so long as the four riveting points are loose or the riveting points shrink or deform after high temperature, the lid will fall off. Preventive cover only pay attention to the following two problems just for the sake of, one base to use heat-resistant materials, two riveting points to rivet well fixed, do the above two problems, this problem was perfectly solved.
Four, light press no conduction.
Many consumers, when using the product, often find that the button press does not react, it is very hard to press, the product has functional response. Because our switches are exposed to air use, many finished products are not sealed, consumer electronics products are required to heat. In wet weather, the switch shrapnel is easy to be oxidized, the contact performance after oxidation is not as good as before, that is, there is a problem of light press not conducting. Many consumers also removed the switch and found a small black spot on the shrapnel, which is the effect of shrapnel oxidation. Therefore, it is recommended that we do not normally use electronic products should be placed in a relatively dry place, prepaid electronic parts are oxidized.
Five, high resistance value.
At present, many customers are not very familiar with the problem of switch resistance. Generally, our switch resistance is controlled below 30m Euro, so the contact performance and life of the switch are very good, but some switches after furnace temperature and life test resistance value is high. What effect will the high resistance have on the switch? If the resistance is high, it means that the contact area between the spring and PIN feet of the switch is small, and the contact area is small, which will lead to the switch not contacting. Once the switch is not contacting, it is not good. Therefore, we should be careful to deal with the switch resistance problem, shrapnel and PIN feet for plating requirements are relatively high, plating resistance value will be low. Switch after life testing, the shrapnel surface will be worn, if the electroplating thin, high resistance, the switch is not good.