US 11,280,112 B2Granted

Dual-unlock combination lock

AssigneesZheng Xu, Bo Li

InventorsBo Li, Hongliang Zhong, Hefei Xue, Yusha Xu, Wentao Xu

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Abstract

A dual-unlock combination lock provides a first set of correct password and a second set of correct password to be used independently. After a password switch pushbutton is operated to drive a bracket to a corresponding position, a corresponding correct password is input into a combination wheel, so that an elastic member props the bracket to release from a transmission element in order to unlock the combination lock. One password element can achieve the effect of unlocking the lock by using two sets of correct password independently to provide a broader scope of applicability. The first set of correct password with the setting and use similar to those of a common password is provided for ordinary users, and the second set of correct password is a fixed code provided for designated users to unlock the combination lock by scanning an identification code by a mobile terminal.

Claims9

Dependent claims

A dual-unlock combination lock, comprising a lock housing, a password element, a transmission element, and a lock tongue for locking an object, and the lock tongue, the transmission element and the password element being installed in the lock housing, and the lock tongue being controlled by the transmission element, and the transmission element being controlled by the password element for locking and unlocking the combination lock, wherein the password element comprises a bracket, a center rod, and two or more combination wheels, and each combination wheel has an inner sleeve, and each combination wheel and each corresponding inner sleeve are rotated altogether, and the center rod passes through the inner sleeve;

the bracket has an elastic member installed at the bottom thereof, such that after the combination wheel inputs a correct password, the elastic member props the bracket to release from the transmission element;
the bracket has a bump formed at the top thereof, and the combination wheel has a first alignment slot, so that when the bump is aligned precisely with and embedded into the first alignment slot, a first set of correct password is defined;
the inner sleeve has a second alignment slot, and the dual-unlock combination lock further comprises a password switch pushbutton operated for driving the bump of the bracket to align precisely with the inner sleeve, and when the bump is aligned precisely with and embedded into the second alignment slot, a second set of correct password is defined.

Dependencies are inferred from the claim text.