Unlocking transmission mechanism for electric control system of emergency exit door lock and multi-selective kit thereof

An unlocking transmission mechanism for an electric control system of an emergency exit door lock, driven by a power transmission shaft of the electric control system to unlock the emergency exit door lock, the emergency exit door lock including a manual-operated press bar assembly, the unlocking transmission mechanism comprising:

• a fixed base assembly, fixed to a press-bar base of the emergency exit door lock;
• a slidable base assembly, disposed at the fixed base assembly within a linear sliding stroke to be reciprocally movable in an unlocking-driving direction;
• a linear driving assembly, driven by the power transmission shaft to further drive the slidable base assembly to move in the unlocking-driving direction within the linear sliding stroke;
• a magnet, disposed on the slidable base assembly;
• a transmission member, having a first pivotal shaft and a second pivotal shaft, the first pivotal shaft being pivotally connected with the slidable base assembly;
• wherein, when the slidable base assembly moves in the unlocking-driving direction within the linear sliding stroke, the transmission member pivots about the first pivotal shaft to rotate the second pivotal shaft with respect to the first pivotal shaft;
• a linkage member, including a first linking end portion and a second linking end portion, wherein, the first linking end portion is pivotally connected with an end pivotal hole of the fixed base assembly, the second linking end portion is pivotally connected with the second pivotal shaft, and the emergency exit door lock is unlocked by having the linkage member to rotate and thus push a press-driving bar of the manual-operated press bar assembly with respect to the end pivotal hole;
• wherein, when an electromagnetic distance sensor of the electric control system detects a distance of the magnet to ensure that the slidable base assembly has moved to an unlocked end position within the linear sliding stroke, the electric control system has the power transmission shaft to stop driving the linear driving assembly, a resilience provided by the manual-operated press bar assembly drives sequentially the linkage member, the transmission member and the slidable base assembly to move the slidable base assembly in a locking-driving direction opposite to the unlocking-driving direction to arrive at a locked end position within the linear sliding stroke.