Patent ID: 9577487
Date: 2017-02-21
CPC Classifications: E05B,H02K,Y10T

Claim:
1. An electronic cylinder for a door lock comprising: an exterior knob; an exterior cylinder core connected securely to an end of said exterior knob; a motor disposed within said exterior cylinder core, having a protrusion block and an axle extending axially and outwardly from said protrusion block; a clutch unit connected operably to said motor; a cam member associated with said clutch unit and said motor for driving a latch assembly to lock or unlock the door upon causing rotation of said cam member when said clutch unit is driven by said motor; a cylindrical coupler seat disposed between said motor and said clutch unit, including a rear chamber for receiving said clutch unit and a front portion located opposite to said rear chamber and having a front end face provided with a blocking opening constituted by an injection channel indented inwardly and axially from said front end face and extending inwardly and radially from a first point of a periphery confining said front end face, an annular recess indented inwardly and axially from a bottom surface of said injection channel and an outflow channel indented inwardly from said front end face and extending inwardly and radially from a second point of the periphery opposite to said first point to terminate at said recess, a bottom surface of said recess being formed with a through hole permitting extension of said axle for operably engaging said clutch unit, said front portion further having a preventing block formed between said bottom surface of said recess and said outflow channel, said preventing block being located in such a manner complementing with said protrusion block of said motor such that once said protrusion block of said motor is seated on said preventing block in said recess, said front end face of said coupler seat abuts fittingly against said motor around said protrusion block; and a waterproof filler hermetically filling said recess in said coupler seat.