Nail gun

A nail gun comprising:

• a gun body;
• a power module disposed in said gun body, said power module being configured to perform a nail-driving operation in which said power module outputs a striking force to strike a nail by receiving a first pressure, and prevented from receiving the first pressure when said power module is subjected to a second pressure;
• a muzzle module mounted to said gun body, and defining a nail exit opening;
• a magazine module connected to said muzzle module for pushing a plurality of nails to move into said muzzle module one at a time;
• a firing module mounted to said gun body, and operable to activate the nail-driving operation for firing the nails via said nail exit opening;
• and
• a detection module including a valve rod that is movably mounted to said gun body for controlling the second pressure, and a detection member that is pivoted to said magazine module and that is operable to pivot between an unsealing position and a sealing position, said detection member being moved to the sealing position when the number of the nails in said magazine module is less than a predetermined amount;
• wherein, when said detection member is at the unsealing position, said valve rod is pushed by said detection member to move away from said detection member to permit release of the second pressure;
• and
• wherein when said detection member is at the sealing position, said valve rod is moved toward said detection member to prevent the second pressure from being released.