Keylock switch and keylock switch system

• US 20020027161A1
• Filed: 01/30/2001
• Published: 03/07/2002
• Est. Priority Date: 09/05/2000
• Status: Active Grant

• Current Assignee: Fujitsu Limited
• Original Assignee: Fujitsu Limited
• Inventors: Kakuta, Kazumasa
• Granted Patent: US 6,778,067 B2
• Time in Patent Office: Days
• US Class Current: 235/382
• CPC Class Codes: G07C 2009/00603 by power transmission from lock
• CPC Class Codes: G07C 2009/00761 with data transmission performed by connected means, e.g. mechanical contacts, plugs, connectors
• CPC Class Codes: G07C 9/00182 operated with unidirectional data transmission between data carrier and locks
• CPC Class Codes: Y10T 70/7028 Electric

Abstract

A first keylock switch and a first keylock switch system of this invention receive the supply of power from two terminals provided to the keylock switch, and output key data. Therefore, this invention can accomplish a small and reasonably-priced keylock switch and keylock switch system, drastically expand the field of application of the keylock switch, and improve security in various fields. A second keylock switch and a second keylock switch system of this invention, in particular, can also maintain the function of a conventional lock utilizing metal material. Also, this invention can isolate the signal read by read means from the power or power source stored in charge storing means to realize both supplying of power and outputting of key data through two terminals. Further, the present invention can quickly reset the state inside the keylock switches to an initial state to prepare for the next use.

Claims

1. A first keylock switch comprising:

first and second terminals each to be a point of making contact electrically;

charge storing means connected between said first and second terminals, for being charged by power supplied through said first and second terminals;

a memory for storing key data having a predetermined length; and

read means for reading said key data stored in said memory by utilizing the power supply from said charge storing means, to output said key data through said first and second terminals.

5. The first keylock switch according to claim 1, wherein

said first keylock switch is a third keylock switch further comprising rectifying means for regulating power supplying direction between said first terminal and said charge storing means and between said second terminal and said charge storing means.

2. A second keylock switch comprising:

a metal key for operating mechanical components provided to a lock;

an insulating part for covering at least a part of a head part provided to said metal key; and

a keylock switch circuit disposed inside said insulating part, wherein said keylock switch circuit includes;

a first terminal disposed at a portion at which said insulating part and said metal key keep contact with each other;

a second terminal disposed on a surface of said insulating part at which said insulating part is out of contact from said metal key;

charge storing means connected between said first and second terminals, for being charged by power supplied through said first and second terminals;

a memory for storing key data having a predetermined length; and

read means for reading said key data stored in said memory by utilizing the power supply from said charge storing means, to output said key data through said first and second terminals.

6. The second keylock switch according to claim 2, wherein

said second keylock switch is a fourth keylock switch further comprising rectifying means for regulating power supplying direction between said first terminal and said charge storing means and between said second terminal and said charge storing means.

3. A first keylock switch system comprising:

a first electronic keylock for actuating a locking operation or a releasing operation in response to acceptance of key data; and

a first keylock switch for inputting said key data to said first electronic keylock, wherein said first keylock switch includes;

first and second terminals each to be a point of making contact electrically;

charge storing means connected between said first and second terminals, for being charged by power supplied through said first and second terminals;

a memory for storing key data having a predetermined length; and

read means for reading said key data stored in said memory by utilizing the power supply from said charge storing means, to output said key data through said first and second terminals, and wherein said first electronic keylock includes;

third and fourth terminals for forming two junctions by contacting said first and second terminals, respectively;

a power source for supplying driving power to said keylock switch through said third and fourth terminals; and

detecting means for detecting said key data from a signal between said third and fourth terminals.

7. The first keylock switch system according to claim 3, wherein

said first keylock switch is a third keylock switch further comprising rectifying means for regulating power supplying direction between said first terminal and said charge storing means and between said second terminal and said charge storing means.

9. The first keylock switch system according to claim 3, wherein

said first keylock switch is a fifth keylock switch further comprising discharging means for discharging power remaining in said charge storing means provided in said keylock switch in response to release of said two junctions.

11. The first keylock switch system according to claim 3, wherein

said first electronic keylock is a third electronic keylock further comprising isolating means for isolating from said power source an AC signal between said third terminal and said fourth terminal.

4. A second keylock switch system comprising:

a second electronic keylock for actuating a locking operation or a releasing operation in response to acceptance of key data; and

a second keylock switch for inputting said key data to said second electronic keylock, wherein said second keylock switch includes;

a metal key for operating mechanical components provided to a lock;

an insulating part for covering at least a part of a head portion provided to said metal key; and

a keylock switch circuit disposed inside said insulating part, wherein said keylock switch circuit includes;

a first terminal disposed at a portion at which said insulating part and said metal key keep contact with each other;

a second terminal disposed on a surface of said insulating part at which said insulating part is out of contact with each other;

charge storing means connected between said first and second terminals, for being charged by power supplied through said first and second terminals;

a memory for storing key data having a predetermined length; and

read means for receiving the supply of power stored in said charge storing means, reading said key data stored in said memory, and outputting said key data through said first and second terminals, and wherein said second electronic keylock includes;

a third terminal so disposed as to keep contact with a metal member to contact said metal key;

a fourth terminal for forming one of junctions, by contacting said second terminal;

a power source for supplying driving power to said keylock switch through said third and fourth terminals; and

detecting means for detecting said key data from a signal between said third and fourth terminals.

8. The second keylock switch system according to claim 4, wherein

said second keylock switch is a fourth keylock switch further comprising rectifying means for regulating power supplying direction between said first terminal and said charge storing means and between said second terminal and said charge storing means.

10. The second keylock switch system according to claim 4, wherein

said second keylock switch is a sixth keylock switch further comprising discharging means for discharging power remaining in said charge storing means provided in said keylock switch in response to release of said two junctions.

12. The second keylock switch system according to claim 4, wherein

said second electronic keylock is a fourth electronic keylock further comprising isolating means for isolating from said power source an AC signal between said third terminal and said fourth terminal.