Vacuum absorption device of smartphone holder

This is a vacuum air pump absorption device inside the smartphone holder, it contains aluminum shield, sucking disk, wireless charging module, negative pressure sensor, air pump module, and its control PCBA. The surface of sucking disk is made of silicon, when the mobile device is attached to it, there will be a confined space between the sucking disk and the back cover of mobile device, also the button at the center of the sucking disk will be pressed to turn on air pump. Negative pressure sensor detects the air pressure inside the confined space real time, when pressure reaches default status, air pump stops working; if air pressure is out of range, air pump will be turned on again to enclose vacuum. The device also contains a release button to disable air pump to take away mobile device, and a battery to maintain functionality while power is cut off, avoid mobile device falling and causing damage.