Padlock with indication device

• US 20060254325A1
• Filed: 07/24/2006
• Published: 11/16/2006
• Est. Priority Date: 01/11/2005
• Status: Active Grant

• Current Assignee: Chun Te Yu
• Original Assignee: Chun Te Yu
• Inventors: Yu, Chun Te
• Granted Patent: US 7,770,421 B2
• Time in Patent Office: Days
• US Class Current: 70/21
• CPC Class Codes: E05B 35/105 Locks allowing opening by official authorities, e.g. master key opening of luggage locks by customs officials
• CPC Class Codes: E05B 37/0034 actuated by either
• CPC Class Codes: E05B 37/025 in padlocks
• CPC Class Codes: E05B 37/14 in padlocks
• CPC Class Codes: E05B 39/00 Locks giving indication of authorised or unauthorised unlocking with key identification means E05B35/001; alarm locks E05B45/00
• CPC Class Codes: E05B 67/24 with built- in cylinder locks
• CPC Class Codes: Y10T 70/415 Combination and/or key-controlled
• CPC Class Codes: Y10T 70/424 Sliding
• CPC Class Codes: Y10T 70/8027 Condition indicators

Abstract

A padlock comprising a housing, a shackle, a lock mechanism and a movable block. The shackle is mounted on the housing and has a first end formed with a shaft portion movably mounted in the housing, and a second end formed with a locking portion moved with the shaft portion and extended outward from the housing. The lock mechanism is mounted on the housing, and includes a lock core and a limit knob. The lock core is mounted in the housing, and the limit knob is located outside the housing and movable by the lock core so as to engage or disengage with the locking portion of the shackle. The movable block is connected to the limit knob of the lock mechanism so that the movable block can be moved to an indication position by operating the lock core of the lock mechanism.

Claims

1. A padlock comprising:

a housing;

a shackle, mounted on the housing and having a first end formed with a shaft portion movably mounted in the housing, and a second end formed with a locking portion moved with the shaft portion and extended outward from the housing;

a lock mechanism, mounted on the housing and including;

a lock core, mounted in the housing; and

a limit knob, located outside the housing and movable by the lock core so as to engage or disengage with the locking portion of the shackle; and

a movable block, connected to the limit knob of the lock mechanism so that the movable block can be moved to an indication position by operating the lock core of the lock mechanism.

2. The padlock of claim 1, further comprising an indication member provided on the movable block.

3. The padlock of claim 2, wherein the limit knob defines a window, and the movable block is mounted in the limit knob so that the indication member is visible from the window when the movable block is located in the indication position.

4. The padlock of claim 1, wherein the lock core of the lock mechanism comprises a body and a rotor received in the body, and wherein the rotor has one end defining a keyhole portion, and the other end defining a driving portion extending from the body for connecting with the limit knob.

5. The padlock of claim 4, further comprising a number lock unit mounted in the housing for locking or unlocking the shaft portion of the shackle.