Access control power supply

The utility model relates to an entrance guard power supply convenient to install and maintain, which comprises a power supply circuit board and a shell consisting of a shell seat and a cover plate, the power supply circuit board is fixed in the shell seat by screws, a touch screen is fixed on the inner side of the cover plate, and the cover plate is provided with a through hole for exposing the touch screen; the touch screen is connected with the power supply circuit board through a flexible wire; more than three blind holes which are evenly distributed are formed in the periphery of the shell base, protruding columns are arranged at the positions, corresponding to the three blind holes in the periphery of the shell base, of the cover plate, and the protruding columns are in interferencefit with the blind holes. A cover opening notch is formed in the position, close to the cover plate, of the side edge of the shell base. During installation by a user, the cover plate can be separatedfrom the shell base only