Device for controlling access to a space closed by a door

Details Device for controlling access to a space closed by a door Device for controlling access to a space closed by a door

1999-02-01

2001-02-13

Paladini, Albert W. (Department: 2836)

Electrical transmission or interconnection systems

Vehicle mounted systems

Automobile

C070S256000, C070S257000, C180S287000, C340S425500

Reexamination Certificate

active

06188141

ABSTRACT:

BACKGROUND OF THE INVENTION
FIELD OF THE INVENTION
The present invention relates to a device for controlling access to a space closed by a door, such as a motor vehicle cabin for example and, more specifically, to such a device comprising electronic means for interrogating an emitter/receiver circuit worn or carried by a person wishing to open said door, to recognize a predetermined code emitted in response by said circuit and to then cause a locking pin to be withdrawn from a notch in a bolt that forms part of the door lock, and means by which said person can activate said electronic means.
Depicted diagrammatically in
FIG. 1
of the appended drawing is a known device, for controlling access to a motor vehicle, which works by the recognition of a code emitted by a badge
1
worn by a person wishing to enter the vehicle. The badge
1
has an electronic circuit for emitting this code, but this emission is not permanent, in order to save the electric battery that powers the circuit. The circuit is activated on reception of a signal emitted by the antenna
2
of electronic means
3
comprising a computer, which means are placed in the vehicle and are capable of recognizing the code emitted in return by the badge
1
so as to allow or deny the person in question access to the vehicle. These electronic means
3
are themselves activated by this person, by pressing the button of a switch
4
placed on the door
5
of the vehicle, near to a handle such as a lever handle
6
for opening this door, this handle being articulated to this door at
6
.
This button has the drawback of being visible and it may therefore be desirable to conceal it within the bodywork, it then being actuated via the lever handle
6
. This handle makes it possible, via a linkage
7
depicted very diagrammatically in the figure, to withdraw a bolt
8
from a keeper
9
to allow the door
5
to be opened, as long as a pin
10
that immobilizes the bolt
8
is disengaged from a notch
11
formed in this bolt. Obviously, it is the electronic means
3
which cause this disengagement, with the aid of an electromagnet
12
, for example, when the code emitted by the badge is such that the person wearing this badge is authorized to enter the vehicle.
The following difficulty is encountered when provision is made for the actuation of the switch
4
to be mechanically coupled to the actuation of the lever handle
6
for opening the door: a pulling action exerted on the lever handle
6
by a person who wants to get into the vehicle has the effect of bringing the pin
10
into abutment against a flank of the notch
11
, creating substantial friction between these two parts. If then the means
3
, having recognized and accepted the code emitted by the badge
1
, energize the electromagnet
12
to disengage the pin
10
from the bolt
8
and thus allow the door
5
to be opened, this friction may prevent the disengagement of the pin and the door then remains closed. In order to overcome this, the person may then release his pulling action on the lever handle
6
so as to reduce the bolt/pin friction and allow these two components to disengage. This additional maneuver is, however, an irksome task which it is desirable to eliminate.
SUMMARY OF THE INVENTION
The object of the present invention is precisely to provide a device for controlling access, particularly to a motor vehicle, which, while not resorting to the presence of a visible switch button on the bodywork near to a door handle, ensures that the pin is disengaged in the event of recognition and acceptance of the code emitted by the badge, before a pulling force exerted manually on the lever handle
6
can create an amount of friction between this pin and the lock bolt that cannot be overcome by the means used for disengaging the pin.
This object of the invention, together with others which will become clear from reading the description which will follow, are achieved with a device of the type described in the preamble of this description, noteworthy in that the means of activating the electronic means are designed to allow there to be a dialog between said electronic means and the circuit worn or carried by the person, and to allow any unlocking of the lock bolt to occur before the action exerted by said person on said handle causes the pin to become stuck by friction in said notch of the lock bolt.
Other features and advantages of the present invention will become clear from reading the description which will follow and from examining the appended drawing in which:


REFERENCES:
patent: 4354189 (1982-10-01), Lemelson
patent: 4993627 (1991-02-01), Phelan et al.
patent: 5616966 (1997-04-01), Fischer et al.
patent: 5697236 (1997-12-01), Kleefeldt et al.
patent: 5708307 (1998-01-01), Iijima et al.
patent: 0218251A1 (1987-04-01), None
patent: 0589158A1 (1994-03-01), None
patent: 2733783 (1996-11-01), None

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