Knob-less horizontal-shift fire door lock

A knob-less horizontal-shift fire door lock, comprising:

• a base, which comprises a longitudinal bar, at least one unlocked-state positioning member being arranged in a range of the longitudinal bar, each of the at least one unlocked-state positioning member being provided with at least one positioning section, the at least one positioning section being formed of a horizontal groove and a guide groove that are set in communication with each other as a group, the horizontal groove being parallel to the longitudinal bar, an included angle being formed between the horizontal groove and the guide groove;
• a latch, which is pivotally mounted, by means of a pivot pin, to a first end of the base, the latch being biased and elastically supported by a spring, such that a part of a free end of the latch is normally biased out of the base;
• a push board, which is pivotally mounted, at a middle section thereof, in the base by an axle;
• and
• a handle bar, which is slidably mounted on the longitudinal bar, the handle bar being at least provided with one guide pin, the guide pin being movable in unison with the handle bar, the guide pin extending through the positioning section, the handle bar being normally biased by at least one elastic element to eject outwards and moving the guide pin to slide into the guide groove, wherein the handle bar is depressible in a direction toward the longitudinal bar and the first end of the handle bar is caused to push and move a second end of the push board such that a first end of the push board is moved to drive the latch to retract inwards into the base to achieve an unlocked state, and the guide pin is caused to slide along the guide groove toward an entry opening of the horizontal groove, wherein the handle bar is horizontally shiftable to cause the guide pin to further slide into the horizontal groove to have the handle bar locked in position and keeping the latch staying in the unlocked state.