What Is A Negative Ion Switch?
The negative ion switch mainly refers to the light touch negative ion switch, which is an electronic switch and belongs to the category of electronic components. It appeared in Japan very early. When in use, the switch function is closed and connected by applying pressure to the operating direction of the switch to meet the conditions of the operating force. When the pressure is removed, the switch opens. Its internal structure is connected and disconnected by changes in force on metal springs.
Negative ion switches have the advantages of small contact resistance load, accurate operating force error, and various specifications, and have been widely used in electronic equipment and white goods, such as audio and video products, digital products, remote controls, communication products, household appliances, security products, games , computer products, fitness equipment, etc., medical equipment, currency verification pens, laser pointer negative ions, etc. Due to the environmental conditions of the negative ion switch (spring force/environmental temperature and humidity conditions, its exerted pressure and electrical performance are less than twice), large equipment and high-load buttons are directly replaced by conductive rubber or metal springs of disc switches, such as medical equipment, TV remote etc.
Negative ion switch is the fourth generation switch product developed with the needs of the development of electronic technology. The very early volumes were 12mm*12mm and 8mm*8mm. Now it is 6mm*6mm. The product structure includes three types: vertical, horizontal and horizontal with ground terminal. Now there are two types: combined type (3M, 4M, SM, 6M, SM) and potentiometer key switch combination, which meet the requirements of various domestic electronic products. The installation dimensions are 6.5mm*4.5mm, 5.5mm*4mm and 6mm*4mm. There are 4.5mm*4.5mm small anion switches and chip anion switches abroad, and the chip anion switch is suitable for surface assembly.
Now there is a fifth-generation switch—the membrane switch, which has the same function as the negative ion switch. It is mainly used in electronic instruments and CNC machine tools, but it has high resistance and poor hand feeling. To overcome the poor feel, some membrane switches are equipped with contact springs instead of silver layers as the contact points. Negative ion switches are divided into two categories: negative ion switches use metal reeds as switch contacts, which have low contact resistance, good hand feeling, and emit a "tick" sound. A switch that uses conductive rubber as a contact path is generally called a conductive rubber switch. The switch handle is good, but the contact resistance is relatively large, generally 100-300n. The structure of the negative ion switch is to move the negative ions downward, so that the contact reed or the conductive rubber block contacts the pad to form a path.
The operating force of the negative ion switch is related to the state of the reed. The starting force is proportional to the compression distance of the reed. When the reed is compressed to 5%-70%, the operating force suddenly decreases, accompanied by a "tick" sound. Turtle rubber switches generally have two structures. The operating force curve varies greatly with the geometry of the rubber block. Negative ion switches are mainly used in color TVs, black and white TVs, audio equipment, video recorders, cameras, computers, fax machines, walkie-talkies, batons, machine tool control devices, copiers, printers, electronic instruments, meters and other household appliances.
