Title:
ANTI-THEFT LOCK CYLINDER WITH ENCRYPTION RING
Document Type and Number:
WIPO Patent Application WO/2017/118392
Kind Code:
A1
Abstract:
An anti-theft lock cylinder with an encryption ring, comprising an outer lock cylinder (1), an inner lock cylinder (2) and an encryption ring (3). Pin holes in the encryption ring (3) communicate with pin holes in the outer lock cylinder (1) and the inner lock cylinder (2). In a locked state, if the number M of pins completely entering the inner lock cylinder (2) is greater than 1, each pin hole has M positions enabling the inner lock cylinder (2) to be separated from the encryption ring (3). Different pin length combinations are selected, so each pin hole only has one position enabling the encryption ring (3) to be further separated from the outer lock cylinder (1) at the same time. If there are N pin holes, MN pin positions enable the inner lock cylinder (2) to be separated from the encryption ring (3), but there is only one position enabling the encryption ring (3) to be further separated from the outer lock cylinder (1) at the same time. The inner lock cylinder (2) moves by two steps in an unlocking process; after the inner lock cylinder moves the first step, pin holes in the inner lock cylinder (2) are staggered from pin holes in the encryption ring (3), and pins in the encryption ring (3) cannot be continuously pushed to make the encryption ring separated from the outer lock cylinder, thus achieving the aim of preventing technical unlocking.
Inventors:
CHENG BAOGUO (CN)
Application Number:
PCT/CN2017/070214
Publication Date:
July 13, 2017
Filing Date:
January 05, 2017
Export Citation:
Assignee:
CHENG BAOGUO (CN)
International Classes:
E05B27/06
Foreign References:
| CN205476897U | 2016-08-17 | |||
| CN201649833U | 2010-11-24 | |||
| CN201087602Y | 2008-07-16 | |||
| CN103603547A | 2014-02-26 | |||
| EP0798433A1 | 1997-10-01 | |||
| GB181429A | 1922-06-16 |
Attorney, Agent or Firm:
BEIJING GLM INTELLECTUAL PROPERTY AGENCY LTD. (CN)
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