Tong Lung Metal Industry Co., Ltd.

Stanley Security Solutions Taiwan Ltd

Cheng-Chung Liu

Lan-Kun Don

Ching-Chuan Kuo

Song-Gen Shyu

Ju-Lin Yang

Wei-Liang Chiang

Tsung-Chung Huang

Chia-Min Sun

Kun-Chen Lee

Jeff Fang

A mortise lock is provided with a reinforcing plate to enhance structural rigidity and robustness for resistance against external destructive pulling forces. The reinforcing plate is disposed in abutment with an exterior cover and a door panel, and is mounted on a mounting post of the exterior cover. The reinforcing plate has a notch to receive and engage a key lock. A securing plate may be disposed between and in abutment with the door panel and a main body of a torsional returning unit which is connected to an exterior handle to further increase structural rigidity.

Mortise lock

A re-keyable cylinder lock has a control member to permit or restrict transverse movement of a re-keying unit. The control member is movable axially between first and second positions and transversely to a third position from the second position. In the third position, the re-keying unit moves transversely and disengages from first tumbler pieces. A limit member is provided to prevent the control member from moving axially when no right key is inserted into a plug. A security arm is connected to the control member and is breakable so that destructive forces cannot reach the control member.

Re-keyable cylinder lock

A cylinder lock includes an outer rose disc having a middle opening, two locking holes, and an annular lateral rim formed with opposite engagement elements, a reinforcement structure having a first plate section that has a central hole aligned with the middle opening, and two passage holes aligned with the respective locking holes, two second plate sections extending transversely from two opposite ends of the first plate section, and two support sections respectively extending from the second plate sections to the lateral rim to engage the engagement elements. An outer drive tube extends through the middle opening and central hole. The reinforcement structure provides enhanced stiffness and robustness to two securing rods extending through the locking holes and the passage holes.

Cylinder lock having a reinforcement structure coupled to an outer rose disc

A cylinder lock includes a shell that has an enlarged tubular section, and a constricted tubular section. A retractor case that contains a latch retractor for retracting a latch is disposed within the enlarged tubular section. An inner surface of the enlarged tubular section is provided with an interlocking unit that interlocks with the retractor case to prevent relative rotational movements of the retractor case and the shell. In an embodiment, the retractor case has at least one tongue extending radially between a pair of annularly spaced apart interlocking elements of the interlocking unit.

Cylinder lock with reinforcements to improve structural strength

A lock with a support structure includes a tubular element connected to a handle having a positioning hole and a center hole. The center hole contains a lock set having a rotatable lock core connected to a transmission element. The transmission element has separated first and second sides. A transversally slidable element is installed to the tubular element for receiving a bias pressure of an elastic element, and includes a protruding portion and a bearing portion. The protruding portion can be moved between engaged and non-engaged positions of the positioning hole of the handle. The support structure includes a support portion. If the first side of the transmission element approaches the support portion of the support structure, the bearing portion of the transversally slidable element will approach the second side of the transmission element for limiting the displacement of the transversally slidable element when an external force is applied.

Lock with a support structure

A cylinder lock includes a latch retractor housing having inner and outer cover plates, inner and outer drive spindles extending respectively through the inner and outer cover plates, a sleeve surrounding the outer drive spindle and having a flange contacting the outer cover plate, an outer shell surrounding the inner drive spindle and the latch retractor housing, and at least one rigid coupling member or tube disposed within the outer shell and engaging and coupling together the inner and outer cover plates and the flange, thereby reinforcing the outer drive spindle and the latch retractor housing and increasing torsional and compression strengths thereof. A reinforcing ring is further provided to couple the outer drive spindle to the outer handle for reinforcement.

Growing community of inventors

Chiayi County, Taiwan

Cheng-Chung Liu