Alarm device

• US 8,528,372 B2
• Filed: 05/20/2009
• Issued: 09/10/2013
• Est. Priority Date: 07/22/2008
• Status: Active Grant

• Current Assignee: MW Security AB (Hangzhou Century Company Limited)
• Original Assignee: MW Security AB (Hangzhou Century Company Limited)
• Inventors: Nilsson, Thomas
• Primary Examiner(s): GALL, LLOYD A
• Application Number:
  US13/055,065
• Publication Number:
  US 20110308283A1
• Time in Patent Office: 1,574 Days
• Field of Search: 70D/IG.49, 70/571, 70/18, 70/30, 70/49, 70/63, 702/33, 702/76, 704/13, 70/14, 70/58, 70D/IG.9, 242/382, 242/382.1, 242/382.4, 242/396.4, 242/385, 242/384.7, 242/378.1, 242/385.1, 242/385.2, 242/385.3, 242/385.4, 340/542, 340/568.2, 340/652, 340/571, 340/572.9, 340/568.4, 340/568.1, 340/568.3, 340/572.6
• US Class Current: 70/57.1
• CPC Class Codes: E05B 45/005 Chain-locks, cable-locks or padlocks with alarms
• CPC Class Codes: E05B 73/0017 Anti-theft devices, e.g. tags or monitors, fixed to articles, e.g. clothes, and to be removed at the check-out of shops
• CPC Class Codes: E05B 73/0029 Tags wrapped around the protected product using cables, wires or the like, e.g. with cable retraction for tensioning
• CPC Class Codes: Y10T 70/483 Flexible shackle
• CPC Class Codes: Y10T 70/5004 For antitheft signaling device on protected article
• CPC Class Codes: Y10T 70/5031 Receptacle
• CPC Class Codes: Y10T 70/7057 Permanent magnet
• CPC Class Codes: Y10T 70/7904 Magnetic features

Abstract

Security device comprising a clasping member that comprises a conducting member, a locking member connected to the clasping member, such that the locking member and the clasping member form a loop, the locking member in turn comprising: a gear member comprising a protruding profile, the gear member extending in a first plane with the protruding profile raised from the first plane, a maneuvering member extending in a second plane parallel to the first plane, the maneuvering member being rotatable relative the gear member and comprising a latch member biased towards the first plane arranged to engage the gear member, such that rotation of the maneuvering member in opposite directions causes a narrowing or a widening of the loop. Rotation in a opposite direction is prevented through the engagement of the latch member with the protruding profile.

Claims

1. A security device comprising:

a clasping member for enclosing an object to be secured, the clasping member comprising a conducting member;

a locking member connected to the clasping member, such that the locking member and the clasping member form a loop, the locking member in turn comprising;

a gear member comprising a protruding profile, the gear member extending in a first plane with the protruding profile raised from the first plane,

a manoeuvring member extending in a second plane parallel to the first plane, the manoeuvring member being rotatable relative the gear member and comprising a latch member biased towards the first plane arranged to engage the gear member, such that rotation of the manoeuvring member in one direction causes a narrowing of the loop whereas rotation in the opposite direction causing a widening of the loop is prevented through the engagement of the latch member with the protruding profile,

the security device further comprising a drum for winding up the clasping member such that rotation of the manoeuvring member causes rotation of the drum and thereby adjustment of the width of the loop, the clasping member and the locking member further forming part of an alarm circuit, wherein the locking member further comprises a movable element electrically connected to the alarm circuit and positioned next to an elastic element, so that an external pulling force applied to the clasping member with the latch member locked in one of protrusions of the protruding profile causes a movement of the movable element towards the elastic element deforming the latter thereby interrupting the alarm circuit and activating an alarm signal.

2. The security device according to claim 1, wherein the locking member further comprises an activation member arranged to engage the drum and the manoeuvring member, such that the external pulling force exerted on the clasping member urges the activation member to move the movable element and thereby deform the elastic element.

3. The security device according to claim 2, wherein the manoeuvring member comprises a groove housing the movable element and the elastic element,

the groove further comprising a space arranged to receive an activation &

lenient of the activation member, the activation member being arranged to move the movable element and thereby deform the elastic element when the external pulling force is exerted on the clasping member.

4. The security device according to claim 1, where the movable element comprises an electrically conducting part in electrical contact with an alarm contact arranged in the locking member.

5. The security device according to claim 1, wherein the movable element is rigid.

6. The security device according to claim 1, wherein the elastic element comprises one of rubber element, foam, plastic or elastic spring.

7. The security device according to claim 2, wherein the manoeuvring member comprises a groove housing the movable element and the elastic element,

the groove further comprising a space arranged to receive an activation element of the activation member, the activation member being arranged to move the movable element and thereby deform the elastic element when the external pulling force is exerted on the clasping member.

8. The security device according to claim 2, where the movable element comprises an electrically conducting part in electrical contact with an alarm contact arranged in the locking member.

9. The security device according to claim 2, wherein the movable element is rigid.

10. The security device according to claim 9, wherein the manoeuvring member comprises a groove housing the movable element and the elastic element,

the groove further comprising a space arranged to receive an activation element of the activation member, the activation member being arranged to move the movable element and thereby deform the elastic element when the external pulling force is exerted on the clasping member.

11. The security device according, to claim 2, wherein the elastic element comprises one of rubber element, foam, plastic or elastic spring.

12. The security device according to claim 11, wherein the manoeuvring member comprises a groove housing the movable element and the elastic element,

the groove further comprising a space arranged to receive an activation element of the activation member, the activation member being arranged to move the movable element and thereby deform the elastic element when the external puffing force is exerted on the clasping member.

13. The security device according to claim 11, where the movable element comprises an electrically conducting part in electrical contact with an alarm contact arranged in the locking member.