Magnetic coding free pin type lock cylinder structure

A magnetic coding free pin type lock cylinder structure, comprising:

• a lock cylinder housing;
• a lock knob rotationally disposed within the lock cylinder housing;
• a lock cylinder front end cover and a lock cylinder rear end cover respectively located at two ends of the lock cylinder housing,
• wherein, at least one pin vertically moving groove and at least one pin horizontally rotary groove are provided on an inner wall of the lock cylinder housing, an unlocking hole for a magnetic coding key is provided axially at an end of the lock knob, opposite to the lock cylinder front end cover, a plurality of pin vertical sliding grooves are provided on an outer wall of the lock knob, free pins are provided in at least one of the plurality of pin vertical sliding grooves, and the free pins are big pins or/and small pins;
• wherein pin moving cavities are formed by the pin vertical sliding grooves and the corresponding pin vertically moving grooves, and each pin moving cavity intersects with the pin horizontally rotary grooves;
• wherein a depth of the pin vertically moving grooves is the same as a depth of the pin horizontally rotary grooves, and a sum of the depth of the pin vertically moving grooves and a depth of the pin vertical sliding grooves is not less than a dimension of the big pins, to ensure that the big pins are freely movable, the depth of the pin vertically moving grooves and the depth of the pin horizontally rotary grooves are less than a dimension of the small pins and the depth of the pin vertical sliding grooves is more than or equal to the dimension of the small pins;
• when the lock cylinder is in a locking state, at least one big pin is located within the pin moving cavities separate from the pin horizontally rotary grooves, or at least one small pin is not entirely located within the pin vertical sliding grooves, when the lock cylinder is in an unlocking state, the big pins are located within the pin moving cavities intersecting with the pin horizontally rotary grooves and the small pins are entirely located within the pin vertical sliding grooves.