Electronic cylinder lock

An electronic cylinder lock, comprising:

• a main body, having a first side, a second side opposite to the first side, and a circumferential side connected between the first side and the second side, the main body further having a shaft hole passing through the first side and the second side, the first side being formed with a corresponding first opening, the second side being formed with a corresponding second opening, the circumferential side of the main body being formed with a notch communicating with the shaft hole;
• a rotary cam, accommodated in the notch, the rotary cam having a connecting hole corresponding to the shaft hole;
• a first shaft, inserted in the shaft hole from the first opening, the first shaft being rotatable relative to the shaft hole, one end of the first shaft being inserted into the shaft hole and the connecting hole of the rotary cam and being provided with a first engaging portion, the first shaft being connected to the connecting hole so that the first shaft can drive the rotary cam to rotate, another end of the first shaft being provided with a first coupling portion, the first shaft having an axial first through hole therein, the first through hole passing through the first engaging portion and the first coupling portion;
• a second shaft, inserted in the shaft hole from the second opening, the second shaft being rotatable and slidable axially relative to the shaft hole, one end of the second shaft, inserted into the shaft hole, being provided with a second engaging portion corresponding to the first engaging portion, the second engaging portion being engagable with the first engaging portion so that the second shaft can drive the first shaft to rotate, another end of the first shaft being provided with a second coupling portion;
• a control lever, inserted in the first through hole of the first shaft, the control lever being slidable axially relative to the first shaft, one end of the control lever being inserted through the first engaging portion and connected to the second shaft so that the control lever can drive the second shaft to slide axially relative to the shaft hole, another end of the control lever being provided with a driving portion;
• a first knob, connected to the first coupling portion and configured to drive the first shaft to rotate relative to the shaft hole, the first knob having a first accommodating space therein;
• a second knob, connected to the second coupling portion and configured to drive the second shaft to rotate relative to the shaft hole;
• a control unit, having a driving source accommodated in the first accommodating space, the driving source being connected to the driving portion of the control lever for driving the control lever to slide axially relative to the first shaft, wherein the control unit has a locked state and an unlocked state, when in the locked state, the driving source drives the control lever to push the second shaft away from the first shaft so that the second engaging portion is disengaged from the first engaging portion;
• when in the unlocked state, the driving source drives the control lever to pull the second shaft to approach the first shaft so that the second engaging portion is engaged with the first engaging portion.