Title:
ANTI-THEFT TAG
Document Type and Number:
WIPO Patent Application WO/2008/031325
Kind Code:
A1
Abstract:
An anti-theft tag includes a housing (82) comprised of a cover (1) and a base(2) with
a stepped-shaped chamber, a coil alarm device (14) between the cover (1) and the
base (2), and a locking device with magnetic field, wherein the locking device
is comprised of not less than three steel balls (7), a steel ball fixing device
and a spring device against the steel balls (7). The steel ball fixing device comprises
a locking cap (8), and the spring device embodies a spring(5,5') and a spring
abutment (21) for accommodating the spring (5,5'). It is provided a transverse
fixing device in the locking device, which is released by transverse magnetic
force or by air pressure. The nail extractor (27) cannot extract the nail (3) whether
the magnetic force is too much or too little.
Inventors:
ZHAO PEIZI (CN)
Application Number:
PCT/CN2007/002515
Publication Date:
March 20, 2008
Filing Date:
August 20, 2007
Export Citation:
Assignee:
ZHAO PEIZI (CN)
International Classes:
G09F3/12; B25C11/00; G08B13/02; G08B13/22; F16B15/02; F16B21/00
Foreign References:
| CN2773808Y | 2006-04-19 | |||
| US4993245A | 1991-02-19 | |||
| CN2758878Y | 2006-02-15 | |||
| US4987754A | 1991-01-29 |
Attorney, Agent or Firm:
DONG, Mei (4F/A, No.33, Lane 672, Changle Road, Shanghai 0, CN)
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