Disc tumbler lock assembly

A disc tumbler lock assembly, comprising a lock housing, a lock cylinder, spacers, inner locking discs, outer locking discs, a latch, and a key;

• the lock housing having a lock cylinder chamber, a latch recess, and a main key hole;
• the lock cylinder being inserted in the lock cylinder chamber in a rotatable manner, the lock cylinder being formed with a disc cavity, a lug groove, and a latch groove;
• each of the inner locking discs being formed with a key hole, the key hole being provided with a raised locking tooth, a side of each of the inner locking discs being formed with a latch notch and a lug located in the lug groove;
• each of the outer locking discs being formed with an inner locking disc room and a key hole, the key hole of the outer locking discs being provided with a raised locking tooth, a side of each of the outer locking discs being formed with a latch notch and a lug located in the lug groove;
• the inner locking discs and the outer locking discs being arranged in pairs, a corresponding one of the inner locking discs being disposed in the inner locking disc room of a corresponding one of the outer locking discs, a corresponding one of the spacers being placed between every adjacent two pairs of the inner and outer locking discs, each of the spacers being formed with a key hole, the inner locking discs and the outer locking discs arranged in pairs being mounted in the disc cavity;
• the latch being inserted in the latch groove of the lock cylinder, a latch return spring being provided between the latch and the lock cylinder;
• the key having an insert lever insertable in the main key hole of the lock housing, the key hole of the inner locking discs, the key hole of the outer locking discs, and the key hole of the spacers, the insert lever being formed with a semi-circular surface, the semi-circular surface being formed with inner bittings to mate with the locking teeth of the inner locking discs and the locking teeth of the outer locking discs for driving the inner locking discs and the outer locking discs to rotate about a central axis of the disc cavity of the lock cylinder, enabling the latch notches of the inner locking discs and the latch notches of the outer locking discs to align the latch groove.