Electronic locks for doors

Details Electronic locks for doors Electronic locks for doors

1981-11-03

1984-02-21

Eisenzopf, Reinhard J.

Electricity: electrical systems and devices

Control circuits for electromagnetic devices

For relays or solenoids

70277, H01H 4700

Patent

active

044333552

DESCRIPTION:

BRIEF SUMMARY
TECHNICAL FIELD

This invention relates to electronic locks for doors.


BACKGROUND ART

It has already been proposed to substitute for conventional mechanical door locks, systems of various sorts in which a "key " is recognized by an electronic circuit which enables the locking bolt to be withdrawn. Since electronic circuits require power previously proposed electronic locks have required a battery to be incorporated in the lock housing, the provision of mains wiring to a lock being undesirable. If, however, a householder fails to change his lock battery it will be impossible to open the door from the outside and the householder may have to resort to breaking in to his own property.
The object of the present invention is to provide an electronic lock in which no battery or mains supply is required.


DISCLOSURE OF INVENTION

In its broadest aspect the invention resides in an electronic lock comprising the combination of an operating member for displacing a locking element, an electronic circuit controlling the operation of the lock and electrical generator means mechanically connected to the operating member so as to generate electrical power for the lock and its electronic circuit when the operating member is moved.
More particularly, an electronic lock in accordance with the invention comprises a body, a lock operating member movably mounted on said body, a lock bolt movably mounted on said body, electrically operated means for enabling movement of the operating member to cause displacement of the bolt, an electronic circuit controlling said electrically operated means and responsive to a coded signal derived from a key element so as to enable movement of the bolt only when a specific coded signal or one of a small number of specific coded signals is received and electrical generator means mechanically connected to the operating member so as to generate electrical power for said electrically operated means and said electronic circuit when said operating member is moved.
Preferably the generator means includes resilient means drivingly connected to the operating member so as to store energy during initial movement of the operating member release means operably by the operating member to release said resilient means and connecting means connecting the resilient means to an electrical generator so that said resilient means when released drives the generator, continuing movement of the operating member displacing said bolt if the said specific coded signal is received.


BRIEF DESCRIPTION OF DRAWINGS

In the accompanying drawings:
FIG. 1 is a perspective view of one example of a lock in accordance with the present invention in position on a door,
FIG. 2 is a part-sectional view of a generator and drive mechanism therefor incorporated in the lock of FIG. 1,
FIG. 3 is a fragmentary section on line 3--3 in FIG. 2,
FIGS. 4 to 6 are part-sectional views of a locking mechanism incorporated in the lock of FIG. 1 in different states;
FIG. 7 is a circuit diagram of an electronic circuit forming part of the lock,
FIG. 8 is a diagrammatic perspective view of a key reader forming part of the lock together with an associated key;
FIG. 9 shows a matrix member forming a part of the electronic circuit;
FIG. 10 is a circuit diagram showing a modification to FIG. 7, and
FIG. 11 is a diagrammatic representation of a more complex electronic circuit providing multiplex operation.


BEST MODE OF CARRYING OUT THE INVENTION

Referring firstly to FIG. 1 the lock includes a face plate 10 intended to be attached to the edge of a door in which the lock is used. Projecting from this face plate is a locking element 11 in the form of a bolt, and an auxiliary bolt 12, the purpose of which will be described hereinafter. Movement of the locking bolt 11 is achieved by means of an operating member in the form of a lever handle 13 coupled to the locking mechanism (see FIGS. 4 to 6) by a square spindle (not shown in FIG. 1). A base plate 14 on which the handle 13 is carried, is formed with a rectangular recess 14a which is shaped to receive a r

REFERENCES:
patent: 4038846 (1977-08-01), Klann

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