Button-type combination lock

A button-type combination lock, which has a reset state, comprising:

• a housing having a first direction and a second direction which are nonparallel to each other, a surface of the housing oriented in the first direction being an operating surface;
• the housing having:
• an accommodating chamber formed in the housing;
• and
• a core recess recessed from the operating surface of the housing, and the core recess and the accommodating chamber spatially communicating with each other;
• a lock core assembly mounted in the core recess and having:
• a core casing mounted in the core recess and protruding from the operating surface;
• and
• a lock core mounted in the core casing and rotatable to a reset position with respect to the core casing;
• a password pad assembly mounted in the accommodating chamber and having:
• multiple button sets mounted in the accommodating chamber, and each one of the button sets including:
• a main body disposed through and protruding from the operating surface, and the main body movable along the first direction;
• and
• a guiding sleeve sleeved on the main body and movable with respect to the main body along the first direction, and the guiding sleeve selectively located at a first position or a second position with respect to the main body;
• an unlocking driving piece connected to the core casing, and the button sets mounted through the unlocking driving piece;
• the unlocking driving piece movable along the second direction, thereby engaging with the guiding sleeves;
• a fixing driving piece, and the button sets mounted through the fixing driving piece;
• the fixing driving piece movable along the second direction, thereby engaging with the main bodies;
• and
• a resetting driving piece sleeved on the button sets and movable along the second direction, thereby one or more of the guiding sleeves located at the second position being pushed to the first position;
• and
• a latch mounted through the housing and connected to the core casing;
• when the button-type combination lock is under the reset state, the lock core is at the reset position, the fixing driving piece engages with the main bodies, the resetting driving piece pushes the guiding sleeves, and thereby each one of the guiding sleeves is located at the first position.