Spring-loaded nail gun

A spring-loaded nail gun, comprising:

• a guide rod;
• a striking spring sleeved over the guide rod with a gap therebetween;
• a striking unit comprising a striking block slidably sleeved on the guide rod and a striker attached to the striking block, the striking spring, when being compressed, driving the striking unit to move along a preset nailing direction to drive a fastener into a workpiece;
• and
• a drive unit comprising an electric motor and a lifting member actuated by the electric motor, the lifting member being actuated by the electric motor to drive the striking unit to move along a preset energy-storing direction such that the striking spring is compressed, the energy-storing direction being opposite the nailing direction;
• wherein a sleeve is further sleeved on the guide rod, and a slot adapted to fit with the sleeve is formed on the striking block, the sleeve has a limiting portion and a base portion which are axially distributed, an outer diameter D1 of the limiting portion being smaller than an outer diameter D2 of the base portion, an end portion of the striking spring being sleeved on an outer periphery of the limiting portion and abutting against the base portion, the sleeve being pressed by the striking spring into the slot, the end portion of the striking spring being also disposed in the slot.