Tact switch: phosphor bronze shrapnel

Tact switch is a kind of electronic switch. It can be turned on by lightly pressing the switch button when in use. When the hand is released, the switch is turned off. Its internal structure is realized by the force of the metal shrapnel. . Tact switches are widely used in household appliances due to their small size and light weight, such as color TV buttons, DVD player buttons, computer mice, relay tact switches, and so on. However, the tact switch determines that its frequency of use will be very high according to its use. High-frequency presses will also have strict requirements on the fatigue strength and service life of the metal shrapnel used inside. Therefore, the conductivity and elasticity are high. The phosphor bronze shrapnel is favored by most manufacturers. With the stamping technology and cost control of phosphor bronze shrapnel being overcome, the application of phosphor bronze shrapnel in contact switches has also been greatly popularized. Phosphor bronze (phosphor bronze , Tin phosphor bronze) is composed of bronze with degassing agent, phosphorus P content 0.03~0.35%, tin content 5~8% and other trace elements such as iron, Fe, zinc, Zn, etc. It has good ductility and fatigue resistance. It can be used in electrical and mechanical materials with higher reliability than general copper alloy products. Common optional models include C5191, C5210, etc. The key factor that ultimately determines the life of phosphor bronze shrapnel is still the metal stamping technology. The stamping technology of Japan and Taiwan is now available in China. It is relatively popular, so in the case of technological improvement, whether the requirements for imported materials are decreasing. For example, the life of 160gf phosphor bronze shrapnel is mainly about 50,000 times in the market (domestic phosphor bronze or relatively backward stamping technology), 100,000 times About 200,000 times, these can be satisfied in China. The first publication of this article is from the original, if there is any repost, please indicate the source and author