Padlock with alarm function

• US 7,921,682 B1
• Filed: 12/15/2009
• Issued: 04/12/2011
• Est. Priority Date: 12/15/2009
• Status: Expired due to Fees

• Current Assignee: Jieh-Jung Chang
• Original Assignee: Jieh-Jung Chang
• Inventors: Chang, Jieh-Jung
• Primary Examiner(s): Gall; Lloyd A
• Application Number:
  US12/638,637
• Time in Patent Office: 483 Days
• Field of Search: 70D/IG.30, 70D/IG.49, 702/76, 70/53, 703/70, 70/49, 70/38.R, 704/37, 704/39, 70/20, 70/38.A, 70/38.B, 70/38.C, 70/50, 70/51, 70/52, 340/542, 340/426.28, 340/571, 340/572.9, 340/5.73
• US Class Current: 70/38.00A
• CPC Class Codes: E05B 45/005 Chain-locks, cable-locks or padlocks with alarms
• CPC Class Codes: E05B 67/063 Padlocks with removable shackles
• CPC Class Codes: Y10S 70/49 with alarm
• CPC Class Codes: Y10T 70/459 Both legs engaged
• CPC Class Codes: Y10T 70/489 Housings
• CPC Class Codes: Y10T 70/491 Shackles
• CPC Class Codes: Y10T 70/7057 Permanent magnet
• CPC Class Codes: Y10T 70/7655 Cylinder attaching or mounting means
• CPC Class Codes: Y10T 70/8216 Tampering detector

Abstract

A padlock includes a lock body, a lock shackle having two ends respectively inserted into a respective shackle hole in the lock body, two actuation members, two latches, a lock cylinder having a core inserted in between the actuation members and rotatable with a predetermined key to drive the actuation members in moving the latches to lock the lock shackle, and an alarm control device affixed to the lock body for causing a buzzer to buzz upon a vibration.

Claims

1. A padlock, comprising:

a lock body, said lock body comprising an accommodation chamber, a lock chamber, a first shackle hole and a second shackle hole arranged in parallel at two opposite lateral sides relative to said accommodation chamber and said lock chamber, two sliding grooves respectively transversely extended between two opposite lateral sides of said lock chamber and said first shackle hole and said second shackle hole, a plurality of first mounting holes respectively disposed in said lock chamber, and a plurality of second mounting holes;

two actuation members mounted in said lock chamber of said lock body,

two latches respectively mounted in said sliding grooves and movable by said actuation members in and out of said first shackle hole and said second shackle hole;

a lock cylinder affixed to said first mounting holes of said lock body, said lock cylinder comprising a core rotatable by a predetermined key to drive said actuation members in moving said latches;

an alarm control device accommodated in said accommodation chamber of said lock body, said alarm control device comprising a housing having a battery chamber that accommodates a set of battery cells, and an alarm circuit board mounted inside said housing, said alarm circuit board comprising a buzzer to output an audio alarm signal;

a U-shaped lock shackle, said U-shaped lock shackle comprising a first end insertable into one of said first shackle hole and said second shackle hole, a second end insertable into one of said first shackle hole and said second shackle hole, a first retaining groove located on the periphery of said first end for the engagement of one said latch, and a second retaining groove located on the periphery of said second end for the engagement of one said latch; and

a cover plate, said cover plate comprising a plurality of mounting through holes respectively fastened to said second mounting holes of said lock body with a respective fastening member and sealed with a respective water seal, a cylinder hole, which receives said lock cylinder, and a bottom chamber fitting over the battery chamber of said housing of said alarm control device.

2. The padlock as claimed in claim 1, wherein said lock shackle further comprises a magnet fixedly mounted on the first end thereof;

said alarm circuit board further comprises a set of switching wires and an induction terminal at one end of said set of switching wires, said induction terminal being affixed to one side of said accommodation chamber of said lock body adjacent to said first shackle hole and inducible by said magnet to switch on said alarm control device into an alert mode upon insertion of the first end of said lock shackle into said first shackle hole.

3. The padlock as claimed in claim 1, wherein said lock body further comprises a locating groove disposed inside said accommodation chamber;

said buzzer of said alarm control device is positioned in said locating groove in said accommodation chamber of said lock body and electrically connected to said alarm circuit board by conductors.

4. The padlock as claimed in claim 1, wherein said lock body comprises two opposing semicircular walls defining said lock chamber;

each said actuation member comprises an arched notch, which receives the core of said lock cylinder, and a protruding portion abutted against one said latch.

5. The padlock as claimed in claim 4, wherein each said latch comprises a protruded rear end abutted against the protruding portion of one said actuation member.

6. The padlock as claimed in claim 1, wherein said alarm control device further comprises a gasket pad covering said housing.