Patent ID: 8070347

Claim:
A lamp assembly of LED string light, comprising: an outer housing being hollow and having: an inner wall; two outer cases being symmetrical and correspondingly assembled; and two half bottom portions being symmetrical and correspondingly assembled, each of the two half bottom portions formed on a lower portion of the inner wall; an inner housing mounted inside the outer housing, being hollow, taking a form of a multi-step cylinder and having: two inner cases being symmetrical and correspondingly assembled, each of the two inner cases having: an engagement portion formed on an inside border of the corresponding inner case; and three half cylindrical portions sequentially and downwardly formed on a periphery of each of the inner cases with the respective diameters decreasing downwardly and the lowest half cylindrical portion received in the half bottom portion of the corresponding outer case; a lamp module mounted inside the inner housing and having a circuit board, an LED bulb formed on a lower end of the circuit board and penetrating through a bottom of the inner housing and a bottom of the two outer cases; a connection circuit formed on the circuit board to electronically connect with the LED bulb; and a set of power lines connected with the connection circuit and sequentially penetrating through the inner housing and the outer housing; a lower shell having: an upper tube being hollow and having an inner diameter matching an outer diameter of the middle half cylindrical portions of the inner housing to sleeve the middle half cylindrical portions therein; and a lower tube being hollow and co-axially connected with the upper tube, and having an inner diameter matching an outer diameter of the lowest half cylindrical portions of the inner housing to sleeve the lowest cylindrical portions therein and at least one first fastening part formed on a periphery of the lower tube; and a lamp cover module being hollow and having: a lamp cover; an opening formed through a top of the lamp cover; a neck formed to extend upwardly from the opening, and having an inner diameter and an outer diameter respectively matching an outer diameter of the lower tube of the lower shell and an inner diameter of the outer housing; and at least one second fastening part formed on the neck, each of the at least one second fastening part engaging with the corresponding first fastening part.