Abstract: A power supply mechanism is provided, which includes a housing and a power supply component, the housing is provided with an installation chamber, which is provided with a battery cell bracket, a bottom of the housing is provided with a fixing part, which is configured to face with the installation chamber, a top of the housing is provided with a connection groove corresponding to the fixing part, the connection groove is communicated with the installation chamber, the power supply component is connected to the battery cell bracket, passes through the connection groove and is provided with a conductive column that is protruded along a direction away from the connection groove; the power supply component is faced to the conductive column and provided with a conductive elastic sheet, a locking part is formed by an outer wall of the conductive column and the connection groove.