Introduction of some problems needing attention in using light touch switch
Release time：2019-03-05 Clicks： Click
When using the light touch switch, we should pay attention to some common problems and avoid these problems. What are the specific problems? Now I will give you a detailed introduction.
Touch switch is an electronic switch, which belongs to the category of electronic components.
There are generally many problems of light touch switch. Here, the author summarizes six major problems, such as the touch of light touch switch, adhesion, cover falling off, light press not conducting, high resistance, fixed after passing the furnace, and so on.
Common Problems of Light Touch Switch I. Hand Feeling
Many customers have been responding, many suppliers send samples feel very consistent, but when it comes to mass production feel different. In fact, this problem is very common. We all know that the handle and push force of the switch are controlled by shrapnel. We often say that shrapnel is divided into phosphorus-copper shrapnel and stainless steel shrapnel. At present, many manufacturers choose phosphorus-copper shrapnel in order to save costs. The price performance of phosphorus-copper shrapnel is relatively high, which is also the reason why it is widely used. However, the phosphorus-copper shrapnel will change after the furnace temperature, and the shrinkage is serious, which will lead to bad hand feeling. The use of stainless steel shrapnel will not have this problem, but the cost of stainless steel shrapnel is relatively high, leading many manufacturers to take the risk of choosing phosphorus-copper shrapnel, so when purchasing lightly touch switch, we must ask the next question clearly.
Common Problems of Light Touch Switches II. Adhesion
Ultra-thin touch switches are generally called thin film switches. Thin switches need thin film to match, so that they can be really thin. However, many thin films have poor temperature resistance and will fall off after the furnace is over. Our professional term refers to adhesion, in fact, is the adhesion of thin film. Imported PI film has a good control of this point. Its adhesion is 400g, which is very suitable for the use of switches. How to be too light and often fall off? If the switch is too heavy, it will not move. In order to save costs, many manufacturers choose cheap domestic PI film. Switches are very prone to adhesion problems. We recommend that you buy it well before you buy it. Good to inquire about the manufacturer. The same is true for light touch switches with points. It is very difficult to point out points with imported rubber. If you use domestic rubber, your problem will come. A penny a penny a penny a penny, I suggest you choose the manufacturers with high quality requirements, give yourself a choice of satisfactory manufacturers.
Common Problems of Light Touch Switch III. Lid Shedding
In the production process, there will be leakage phenomenon in the cover with customer reaction switch. How did a good switch cover fall off? First, we need to understand the structure of the switch. The cover of the switch is on the back cover. This is a constant production process for thousands of years. Familiar people will find that the lid is fixed by four rivets on the base, so as long as the four rivets are loose or the rivets shrink or deform after high temperature, the lid will fall off. Preventive cover only pay attention to the following two problems. In order to solve this problem, one base should be made of heat-resistant material, the second riveting point should be riveted and fixed well, and the above two problems should be well done.
Common Problems of Touch Switch IV. Light Press Not Turn on
Many consumers, in the use of products, often find that the button pressed does not respond, to press very hard, the product has functional response. Because our switches are exposed to the air, many finished products are not sealed, consumer electronic products are required to heat. In wet weather, the shrapnel of the switch is easily oxidized, and the contact performance after oxidation is not as good as before, that is, there is a problem of light press and no conduction. Many consumers have also dismantled the switch and found that there will be a small black spot on the shrapnel, which is the effect of shrapnel oxidation. Therefore, it is suggested that the electronic products we do not normally use should be placed in a relatively dry place and the prepaid electronic parts should be oxidized.
Common Problems of Light Touch Switch V. High Resistance Value
At present, many customers don't know much about the resistance value of the switch. Generally, the resistance value of the switch is controlled below 30m Euro, so the contact performance and life of the switch are very good, but some switches have higher resistance value after furnace temperature and life test. If the resistance is high, it means that the contact area between the shrapnel and PIN foot of the switch is too small, and the contact area is too small to make the switch contactless. Once the switch is not contacted, it will be bad. Therefore, we should be careful about the resistance of the switch, the shrapnel and PIN foot for plating requirements are relatively high, plating resistance will be low. After the life test, the surface of the shrapnel will be worn. If the electroplating is thin, the resistance will be high and the switch will be bad.
Common Problems of Light Touch Switch 6. Stay on after passing the furnace
A good switch, after reflow soldering experience, can not press, very poor. Many customers are also responding to this problem, so what caused it? The patch switch is tightly attached to the PCB, and the PIN foot will be solder paste. If the hole of the steel mesh is slightly larger, the solder paste can easily flow into the inside of the switch. If there is foreign matter in the inside of the switch, it will certainly affect its journey. The most common thing is to press it still. Another situation is that the sealing performance of the switch is not good, flux flows into the inside of the switch, so the problem arises.