Title:
SIMPLE AND EASY CARD LOCK
Document Type and Number:
Japanese Patent JP3681437
Kind Code:
B2
Abstract:
PURPOSE: To reduce cost, by compressing a flexible elastic bag through a code board provided between both cards and working an actuator, when PIN codes bored in a key card and a lock card by a specified method, coincide with each other.
CONSTITUTION: A key card 1 is expressed by the selection of a pair of small portion in 2n small portions that the exponent of a PIN processed with a binary system is developed in a specified pattern and the bit showing 0 or 1 of each digit of the PIN is expressed by boring one of a pair of small portions allocated to the digit and leaving the other thereof as it is. The lock card 2 is almost the same with the card 1. The bit showing 0 or 1 of each digit of the PIN is bored reversely against the card 1. When the PINs of the card 1 and the card 2 joined to the code board 5 coinside with each other and when the card 1 is pressed on a flexible elastic bag 6, the opening of a short cylindrical body 23 is closed and the air in the bag is led to flow into the actuator and then the lock is unlocked. In this way, the structure is simplified and the cost is reduced.
Inventors:
Azumi Waki
Application Number:
JP11931395A
Publication Date:
August 10, 2005
Filing Date:
April 19, 1995
Export Citation:
Assignee:
Miwa Lock Co., Ltd.
International Classes:
E05B49/00; E05B35/00; E05B51/02; G06K19/00; (IPC1-7): E05B35/00; E05B51/02
Domestic Patent References:
| JP57058784A | ||||
| JP63315783A |
Attorney, Agent or Firm:
Takeo Iida
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