Mortise lock body

The utility model discloses a mortise lock body, which comprises a lock body seat, a lock body cover and a lock body modification plate installed in front of the lock body seat, and an oblique body is arranged in the oblique tongue sliding hole of the lock body modification plate a tongue, a slanting tongue reversing hole is respectively formed on the lock body seat and the lock body cover, and the back of the slant tongue is connected with one end of the slanting tongue disposed in the lock body seat, and the other end of the slanting tongue and the dial piece Connecting, the dial piece can be rotated around the center of the handle socket on the lock body seat, and the lock body seat and the lock body cover are provided with vertical strip grooves perpendicular to the horizontal sliding direction of the tongue A commutator piece for controlling the reversal of the slanting tongue is placed between the lock body seat and the vertical strip groove of the lock body cover, and the commutator piece is slidable along the vertical strip groove. It is safe, reliable and easy to commute, and it is small in size, reasonable in structure and wide in scope.