US 4,833,465 A · Electronic door lock

Abstract

The electronic door lock for an electronic key provided with an electronic store for a key word datum has a latch bolt (5) actuatable at least from the inside of the door by means of a handle and a bolt (7) which is lockable and unlockable by an electric drive device (35). A control circuit (81) formed especially as micro-processor reads the key word datum stored in the key, through the reading device (77), and controls the electric drive (35) in dependence thereon. The reading device (77) includes sensor elements (93, 95), especially pieco-electric elements by way of which the drive direction of the electric drive (35) is selectable by a key movement of short stroke. In order that the electronic lock may be opened manually in case of emergency, a mechanical lock cylinder (113) is provided by means of which the bolt (7) is uncoupled from the drive connection to the electric drive (35) and is bringable into a drive connection to the handle nut (23) actuating the latch bolt (5 ). Then by actuation of the door handle, in addition to the latch bolt (5) the bolt (7) can be unlocked. The data transmission between the reading device (77) and the electronic key takes place contactlessly by infra-red, like the working voltage supply of the key. The working voltage supply can however also take place through electric contacts.

Claims30

Dependent claims

Electronic door lock for an electronic key (69;

177) provided with an electronic store (75;
179) for a key word datum, having a latch bolt (5;
175) engaging in a keep plate (9;
171) and actuatable at least from the inside of the door by means of a handle, a bolt (7;
165) movable out into the keep plate (9;
171), an electrically controllable locking mechanism (35, 37;
167) for the bolt (7;
165), a reading device (77;
183) for the key word datum of the electronic key (69;
177) and a control circuit (81;
185) controlling the locking mechanism (35, 37;
167) in dependence upon the read key word datum, characterised in that the reading device (77) comprises a sensor device (93, 95) responding to two three-dimensionally different orientation of the electronic key (69;
177), one orientation being for locking, and the other being for unlocking, and in that the locker mechanism (35, 37;
167) comprises an electric drive device (35), controlled by the control circuit (81p;
185) for the unlocking and locking movement of the bolt (7;
165) and drives the bolt (7;
165) in dependence upon the orientation of the electronic key (69;
177) detected by means of the sensor device (93, 95), in the unlocking or in the locking direction.

15 more elements

A locking arrangement comprising several locks, including first locks having mechanical tumblers, the first locks being lockable by means of mechanical keys which each have a key shank provided with mechanical locking codes (143) so as to be interactable with the mechanical tumblers of the first locks, and second locks having latch bolts (7) actuatable by electromotor drives (35), so as to be movable into and out of the second locks, and electronic reading apparatus (91) for electronic locking codes stored on electronic keys (69) which contain an electronic memory and control circuit (75), each of the electronic keys having a key shank (73) which is insertable into the electronic reading apparatus (91), each key shank (73) having at least one first infrared transmitting element (83) for transmitting an electronic locking code, the reading apparatus having one first infrared light receiving element (87) assigned respectively to the infrared transmitting element (83), the key shank (73) further having a second infrared light receiving element (89) for optical energy transmission of an operating voltage supply for the electronic memory and control circuit (75), and the reading apparatus having at least one second infrared light transmitting element (91) assigned to the second infrared light receiving element (89), at least one of the electronic keys (69) including mechanical as well as electronic locking codes for locking at least one first and at least one second lock.

Dependencies are inferred from the claim text.

Electronic door lock

Life of this patent

Electronic door lock

Life of this patent

Abstract

Claims30