Structure for electric lock

• US 20030070458A1
• Filed: 09/06/2001
• Published: 04/17/2003
• Est. Priority Date: 09/04/2001
• Status: Active Grant

• Current Assignee: Tsun Thin Huang
• Original Assignee: Tsun Thin Huang
• Inventors: Huang, Tsun Thin
• Granted Patent: US 6,601,418 B2
• Time in Patent Office: Days
• US Class Current: 70/283
• CPC Class Codes: E05B 15/101 Spring-retracted bolts
• CPC Class Codes: E05B 2047/0007 with two or more electromagnets
• CPC Class Codes: E05B 2047/0058 by batteries
• CPC Class Codes: E05B 47/0002 with electromagnets
• CPC Class Codes: E05B 47/0004 said core being linearly movable
• CPC Class Codes: E05B 47/0006 having a non-movable core; with permanent magnet
• CPC Class Codes: E05B 47/0607 the detent moving pivotally or rotatively
• CPC Class Codes: Y10T 292/096 Sliding
• CPC Class Codes: Y10T 292/1021 Motor
• CPC Class Codes: Y10T 70/7102 And details of blocking system [e.g., linkage, latch, pawl, spring]
• CPC Class Codes: Y10T 70/7113 Projected and retracted electrically
• CPC Class Codes: Y10T 70/7119 Projected electrically only
• CPC Class Codes: Y10T 70/7124 Retracted electrically only
• CPC Class Codes: Y10T 70/713 Dogging manual operator

Abstract

An improved structure of electric lock disclosed herein employs only one electromagnetic coil and a DC power source formed of 4 3A-type dry battery unit for operating the lock instead of using two coils and an AC large power source along with a clumsy conductor layout, and a skilful arrangement of mutual positions between the driven rod and the extended portion of the actuated rod can produce an amplified driving torque effect from this minimized DC power source. Besides, the key function is controlled by a coded chip attached thereon to identify the visitor.

Claims

1. An improved structure of electric lock comprises in a lock case an electromagnetic coil, an actuated rod, a detection arm, and a tongue piece operation mechanism, wherein said actuated rod is hinged to a pivoted axis and is retained by said detection arm at its front terminal thereof, said detection arm is also hinged to a pivoted axis and its hinged end is formed into a recessed breach to trap one side of an inversely U shaped () frame of said tongue piece operation mechanism;

said tongue piece operation mechanism further includes said frame, a latch, a tongue piece, a follower member, and a connecting rod, the center portion of said frame allows freely for said latch to tunnel through, the rear portion of said latch is spirally encircled with a coil spring whose one end is secured to the inner side of the rear leg of said frame, the front leg of said frame stands ahead of a first erecting member of said follower member, a second electing member is located behind said first electing member separating with a proper distance, said connecting rod tunnels through said two erecting members and is equipped with a coil spring around its rear portion;

it is characterized in that the end of said actuated rod is added with an extended portion configured in an upwardly concaved arcuate shape so as to evade interfering with the tongue piece operation mechanism, the end of said extended portion is mated with a driven rod laying along an inner edge of said lock case, said driven rod, being actuated by said electromagnetic coil and tunneling through it, is equipped with a coil spring at its one end thereof, said electromagnetic coil is installed at a position near said tongue piece, a sleeve is attached to one end of said actuated rod, and a coil spring is equipped in said sleeve to emerge an axle pin thereby assisting said actuated rod to settle down properly, an insertion slit is formed abut to a side of said sleeve for insertion of a circuit board, a battery component is provided at another side of said lock case;

with this structure, by forming extended portion of said actuated rod and appropriately locating said electromagnetic coil and said driven rod to push the distal end of said extended portion enables said lock to produce necessary torque to push said actuating rod to unlock with a small DC current and eliminate trouble of preparing a clumsy AC power source with conductors.

2. The improved structure for electric lock of claim 1, wherein a read in head is equipped at a proper position in said lock case for reading in information stored in a coded chip provided with the key.

3. The improved structure for electric lock of claim 1, wherein a sub-lock mechanism including a straight slot and an arcuate slot is provided at a proper position in said lock case, said straight slot is movable along a stationary pin located therein, while said arcuate slot is slideably movable by actuation of a driving pin and a rotary switch button is provided for said driving pin for controlling its operation.