Basically, mobile phones all have vibration functions. For example, when it is not convenient to use ringtone reminders and have very important calls, it is very important to use the vibration function. Then, do you know how the mobile phone produces a shock? The vibration generated in the mobile phone is a motor. The shaft is equipped with a cam similar to a semicircle. The center of gravity of the cam is not on the shaft of the motor. When rotating, the cam makes a circular motion, generating centrifugal force, and the direction of the centrifugal force is constantly changing. A constantly changing force, so the phone has a sense of shock. Previous models of old people or mobile phones with limited restrictions used this type of vibration. The coils of such motors are typically elliptical or triangular-like multilayer coils.
The vibration motor is combined with the mobile phone circuit. When there is information or need to be reminded by the vibration, the mobile phone circuit will give the motor a current, and the rotation of the motor rotor will drive the cam to rotate, thus generating vibration, and the magnitude of the current determines the vibration frequency of the motor. The circuit also controls the intermittent vibration of the motor.
The other is the relatively new motor, linear motor - first used by Apple (first used on the iPhone6splus). In fact, the principle is not complicated, there are metal shrapnel inside, two shrapnel overhead a magnet, and the coil is wound on the outer casing.
By energizing the coil, the coil generates a magnetic field that reacts with the magnet in the middle and moves back and forth to produce vibration. The linear motor is relatively small in size, with a stronger shock and higher cost. The Apple 7p uses six sets of magnets and shrapnel, so it can be seen as a strip-shaped whole when disassembled. The purchase price is said to be $10. Early linear motor technology was immature, vibration would make the motor damaged. Although there is a “buffering” design, such as wrapping buffer material, the mobile phone will be damaged when the phone vibrates for a long time. It is not difficult, but it is also a trouble. user experience! Today's linear motors basically do not have such problems, and will not adversely affect the phone! The coil of a linear motor is a rectangular or rounded quadrangle.
Of course, the vibration motor can also be used in other places, such as button reminders, for the screen buttons, the vibration reminder of the button is a good feedback experience. Basically, high-end mobile phones now use linear motors.
In order to adapt to the slim design of the mobile phone, the vibration motor of the mobile phone makes the volume of the vibration motor very small. Therefore, each space should be fully applied. The coil of the motor is the driving component of the motor, which is particularly important. The wire diameter and clearance of the motor. The size, shape and shape have strict requirements to achieve the original design effect. This puts higher demands on the winding equipment. The winding machine must meet the high precision and the efficiency should not be low. Xinyue TECH is able to provide proven inductor coils and solutions.