What is a negative ion switch?

　Negative ion switchMainly refers to the light touch negative ion switch, negative ion switch is an electronic switch, belonging to the category of electronic components. It appeared early in Japan. When in use, the switch function is turned off and connected by applying pressure to the operating direction of the switch to meet the operating force conditions. After the pressure is removed, the switch is turned off. Its internal structure is connected and disconnected by the change of force on the metal spring.

Negative ion switch has the advantages of small contact resistance load, accurate operating force error, and diverse specifications. It has been widely used in electronic equipment and white goods products, such as audio and video products, digital products, remote controls, communication products, household appliances, security products, games, Computer products, fitness equipment, medical equipment, currency verification pens, laser pen negative ions, etc. Due to the environmental conditions of the negative ion switch (elastic force/ambient temperature and humidity conditions, its applied pressure and electrical performance is less than twice), large-scale equipment and high-load buttons are directly replaced by the conductive rubber or metal spring of the disc switch, such as medical equipment, TV remote control, etc.

　　Negative ion switchIt is the fourth generation of switch products developed with the development of electronic technology. The very early volumes are 12mm * 12mm and 8mm * 8mm. Now it is 6mm * 6mm. The product structure includes three types: vertical, horizontal and horizontal with ground terminals. There are now two types: combined (3M, 4M, SM, 6M, SM) and potentiometer key switch combinations to 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 negative ion switches and chip negative ion switches abroad. Chip negative ion switches are suitable for surface assembly.

Now there is a fifth generation of switches-membrane switches, which function the same as negative ion switches. It is mainly used in electronic instruments and CNC machine tools, but it has high resistance and poor hand feeling. In order to overcome the problem of poor hand feel, some membrane switches are equipped with contact springs instead of silver layers as contact points. Negative ion switches are divided into two categories: negative ion switches use metal reeds as switch contact pieces, with low contact resistance, good hand feeling, and a "ticking" sound. A switch that uses conductive rubber as a contact path is generally referred to as a conductive rubber switch. The switch handle is good, but the contact resistance is 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.

　　Negative ion switchThe operating force 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 "ticking" sound. Turtle guide rubber switch generally has two kinds of structure. 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.