Abstract: A transmission mechanism of handle lock set used for driving a latch to perform extension/retraction action includes a driving plate and a transmission plate. The driving plate includes a supporting portion having a transmission surface with an arc surface and a blocking surface with a flat surface. The driving plate is rotated to make the supporting portion swinging between a first position and a second position. The transmission plate further includes a protrusion having a contact surface. The transmission surface contacts the contact surface and pushes the protrusion to prevent the driving plate from being unavailable due to transmission dead spot occurrence when the supporting portion locates at the first position. The blocking surface contacts the contact surface of the protrusion to prevent the driving plate from over rotation for avoiding unavailable return when the supporting portion of the driving plate locates at the second position.

Abstract: An input authentication method includes a processing unit generating a lead code according to a predetermined character string, wherein the predetermined character string includes a plurality of randomly arranged characters, the lead code is composed of N characters selected from the predetermined character string, and N is a positive integer; displaying the lead code on an input interface; the input interface receiving a first input; and when the first input corresponds to the N characters of the lead code, the processing unit performing a predetermined operation.

Abstract: A reversible handle device includes a housing, a handle portion rotatably disposed on the housing and rotatable relative to a long axis, a reversible member and a stopping member. The reversible member is connected to the handle portion and rotatable relative to the handle portion. The reversible member has a first slot and a second slot for switching the handle portion to be in a first orientation status or in a second orientation status. The stopping member is disposed on a side of the reversible member in a manner of being movable in a direction parallel to the long axis. The stopping member is biased toward the reversible member in the direction parallel to the long axis, such that the stopping member protrudes into the first slot or the second slot. Accordingly, the handle portion is in the first orientation status or in the second orientation status.