A compact mobile phone external laser pointer system

The compact mobile phone external Laser pointer includes a plastic plug-in head, a metal sheet, a buck-boost drive circuit module, a laser diode, a lens module and an outer cover. The metal sheet is symmetrically embedded on the lower side wall of the plastic plug-in head. A pair of auxiliary rotation marking structures are symmetrically formed on the outer cover; it can be inserted into the earphone jack of the mobile phone through its plastic plug-in head, and the laser pointer can be rotated 90 degrees to make the metal sheet contact the audio signal interface of the earphone jack. When it is turned on, there is no need to unplug the laser pointer from the earphone jack of the phone when not in use. The laser pointer can be turned off by rotating the laser pointer 90 degrees to separate the metal sheet from the audio signal interface of the earphone jack. When rotating, the auxiliary rotation identification structure is used Recognize the rotation angle; no external power supply is required, and it can be plugged into the earphone jack of the mobile phone externally. The structure is small and exquisite, easy to carry, simple to operate, and can be used as a dustproof earphone plug and mobile phone accessories.