Door lock
OwnerChing-Tien Lininventor
Life of this patent
Estimating the term…
Abstract
A door lock is proposed, in which an outside knob assembled at the outside of a door can be manually controlled to be operationally associated with or dissociated from the door lock. When the door lock is fastened, the outside knob can be selectively decoupled from the door lock and become idle; this is greatly beneficial as to prevent the door lock from being damaged even if the outside knob is exerted with external impact or forcibly turned by a strong force. The door lock is further provided with a fireproof mechanism, which prevents the door from being opened during a fire, thereby confining spreading of the fire to minimize fire-induced damage.
Claims20
A door lock, comprising:
- a housing for receiving internal components of the door lock therein;
- and a first and a second doorknobs externally connected to the internal components of the door lock;
- wherein the internal components of the door lock comprise:
- a dead bolt adapted to be operatably driven by a key through a keyhole formed on the housing;
- a latch bolt adapted to be operatably driven by at least one of the first and second doorknobs;
- a first doorknob mechanism associated with the latch bolt and the first doorknob, the first doorknob mechanism comprising:
- a first body formed with a recessed portion;
- a first pivot member received in the recessed portion of the first body, and connected to the first doorknob, so as to allow the first doorknob to be operationally associated with the first pivot member;
- at least a first coupling member adapted to be capable of being selectively coupled to the first body and the first pivot member;
- a first fixture attached onto the first body and associated with the latch bolt, the first fixture being adapted for retaining the first pivot member within the recessed portion of the first body, and for preventing the first coupling member from escaping out of the first body;
- and
- a control means associated with the first coupling member, for manually controlling positioning of the first coupling member with respect to the first body and the first pivot member;
- and
- a second doorknob mechanism connected to the first doorknob mechanism, and associated with the latch bolt and the second doorknob;
- the second doorknob mechanism comprising:
- a second body formed with a recessed portion, and engaged with the first body of the first doorknob mechanism in a manner that, the recessed portion of the second body is positionally opposed to the recessed portion of the first body;
- a second pivot member received in the recessed portion of the second body, and connected to the second doorknob, so as to allow the second doorknob to be operationally associated with the second pivot member;
- at least a second coupling member adapted to be simultaneously coupled to the second body and the second pivot member;
- a second fixture attached onto the second body and associated with the latch bolt, the second fixture being adapted for retaining the second pivot member within the recessed portion of the second body, and for holding the second coupling member in position;
- and
- at least a fixing means for integrally connecting the second fixture, the second coupling member and the second body, so as to allow the second pivot member and the second doorknob to cooperate with the second doorknob mechanism as a whole for driving the latch bolt to operate.
Dependencies are inferred from the claim text.