Patent ID: 11933077
Assignee: nan
Field: Civil engineering (Other fields)
Classification: CPC E | IPC E

Claim 0:
1. A combination lock for electronic devices comprising a main body, a digit lock core, a key lock core, a control unit, a driving block, a switching unit, and two engaging units;
wherein the main body has two halves of shells to fit together, and the digit lock core and the key lock core are installed in the shells of the main body; a first slot is formed in an upper portion of the shells at the position corresponding to the digit lock core while a second slot is formed in the upper portion of the shells at the position corresponding to the key lock core, and the first slot and the second slot are communicated through a corner portion; a locating block protrudes from an interior space of the corner portion; the first slot is adapted to laterally penetrate through the shells through an operating opening, and a spherical first housing is formed at the upper end of the first slot, and as the control unit is coupled in the main body, a top rod of the control unit is configured to upwardly protrude from the first housing; a first through hole is formed at a lower portion of the shells, and a key of the key lock core is configured to be inserted into the shells through the first through hole, and a lock cable is connected to one end of the shells;
wherein the digit lock core comprises a lock pin which is adapted to keep pressed into the first slot when not operated, and a digit wheel is disposed on the digit lock core so as to control the lock pin into the locked/unlocked position; when the code of the digit wheel matches the preset code of the digit wheel, the lock pin is adapted to be driven downwardly into the unlocked position; an upper end of the lock pin comprises an abutting board having a larger diameter than the lock pin;
wherein the key lock core has a lock rod which is configured to keep pressed into the second slot when not operated, and the lock rod is operated through the key; when unlocked by the key, the lock rod is adapted to be driven downwardly into the unlocked position;
wherein the control unit comprises a board body, and a top rod is extended from the board body, and one edge of the board body is connected to a push button; the control unit is positioned into the first slot of the shells, and the push button and the top rod are adapted to protrude from the operating opening and the first housing respectively; a first spring abutted between the first slot and the control unit is configured to keep pushing the control unit upwardly in normal condition;
wherein the driving block has an extending section formed at an upper portion thereof, and the extending section comprises a smaller diameter than that of the driving block, and the driving block is positioned into the second slot in the two shells so as to connect to the lock rod of the key lock core; when the key lock core is locked, the lock rod is protruded to drive the extending section of the driving block into the corner portion of the shells;
wherein the switching unit comprises a connecting channel at a central portion thereof, and the switching unit is disposed on the locating block through the connecting channel; a second spring is adapted to be abutted between an inner wall of the locating block and an inner wall of the connecting channel so that the second spring is configured to keep pushing the switching unit laterally in normal condition; the switching unit is configured to abut against the extending section in the corner portion so as to limit the position of the switching unit; a sliding slot is formed at a lateral side of the switching unit, and a sliding block is adapted to slidably couple with the sliding slot, and a third spring is abutted between the sliding block and the sliding slot; the sliding block is positioned between the abutting board and the control unit; and
wherein the two engaging units are two halves to fit together, and each of the engaging units has a hemi-spherical portion at a lower end thereof, and the two hemi-spherical portions are put together and positioned in the first housing of the main body, and the top rod is positioned between the two hemi-spherical portions; a first annular groove is formed on the inner surface of the first housing, and each of the engaging units has at least a sliding column protruding from the hemi-spherical portion, and the sliding column is adapted to slidably move in the first annular groove so as to limit the relative position between the engaging units and the main body; each of the engaging units comprises an engaging arm at a top portion thereof, and the engaging arms are configured to protrude out of the main body; a second annular groove is formed on the surface of the main body adjacent to the opening of the first housing, and a round cover is coupled with the second annular groove; the round cover has a second through hole to allow the engaging arms to penetrate therethrough, so that, through the second annular groove, the main body is adapted to rotate relative to the round cover; when the top rod is pushed upwardly, the two engaging arms are configured to be driven and spread apart so as to achieve the locked effect.