FR2473602A1 - SYSTEM FOR LOCKING AND AUTOMATICALLY UNLOCKING DOORS FOR MOTOR VEHICLES BY ELECTRICAL MEANS - Google Patents

Abstract

The invention relates to an automatic door locking system. According to the invention, it comprises actuation means 12, 13 and 14 to lock / unlock the doors, locking switches 16 for all the doors, and unlocking 20 for all the doors, locking relay coils 7 and unlocking 11, locking release switches 40 allowing a current to flow in the actuation means for locking the doors, and unlocking release 41 allowing another current to flow in the doors. actuation means to unlock the doors, an impact detector 21 connected in parallel to the switch 20 to energize the coil 11 to actuate the switch 41, thus all the doors are unlocked when an impact is suffered by the vehicle, and another timer 22 is provided to energize coil 11 a certain time after switching on detector 21 for a fixed time. The invention applies in particular to the automotive industry. (CF DRAWING IN BOPI)

Description

The present invention generally relates to a system of

  automatic door lock for a motor vehicle, and more particularly to an automatic door lock system such as

  all locked doors are automatically

  unlocked when an extraordinarily large shock, such as a collision, is unfortunately

sub-vehicle.

  As is well known, the devices according to the prior art of automatic locking of racks use electronic vacuum and electronic actuation means and combined vacuum: s. ccontrolling the automatic locking / unlocking of all doors in a vehicle. Until now, however, in none of the devices according to the prior art is incorporated a shock sensor which automatically causes the doors to unlock when subjected to an external shock, such as a collision. As a result, it is necessary to unlock the doors from inside or outside the vehicle when the driver or passengers must urgently exit the passenger compartment or be safe from them, which can cause a serious accident due to the delay in action

reauide appropriate.

  2- Therefore, keeping these problems in mind, the present invention has for its main object an automatic door lock system for a vehicle

  autcobile by which all the doors are automatically

  unlocked when the vehicle experiences a 3C impact in a traffic accident such as a collision or rollover, so that drivers and passengers can easily escape or be saved

  the passenger compartment of the vehicle.

  In order to achieve the above mentioned objective, the automatic door locking system according to the present invention comprises an impact sensor connected in parallel to a door unlocking switching circuit. In addition to a locking system. automatic doors for a motor vehicle. The invention will be better understood, and other objects, features, details and advantages thereof will be apparent.

  more clearly in the explanatory description

  which will follow made with reference to the accompanying schematic drawings given solely by way of example illustrating an embodiment of the invention, and in which - Figure 1 gives a block diagram of an embodiment of the automatic locking system of the invention. doors according to the present invention; FIG. 2 is a diagram of the detailed circuit of the first timer of FIG. 1; and FIG. 3 is a diagram of the detailed circuit of the

  second timer of Figure 1.

  To facilitate the understanding of the present invention, with reference to FIG.

  detailed description of an automatic locking system

  speed sensitive doors.

  When the driver or other person operates a door lock knob or key on the inside or outside of the vehicle, a switch

  normally open lock 16 is switched on.

  As a result, a current flows from battery B to

  51 by means of a fuse link 1, an ignition switch

  mage 2, a fuse 3, a diode 33, a first timer

  15, and the lock switch 16, and thus the first timer operates for a period

  predetermined time to pass a transistor 25 -

  upon closing, thereby exciting a latch relay coil 7 by current flowing therethrough from the battery to ground 26. Referring to FIG. 2, the operation of the first timer will be described in more detail. When the lock switch 16 is turned on, a current flows from the battery B to the ground 31, through a resistor R8 and the lock switch 16, and a voltage develops in the resistor R8. As a result, another voltage starts charging a capacitor C2. Since the emitter and the base of the transistor Tr1 are almost at the same potential when the latch switch 16 is turned on, Tr1 is kept off; however, then, as the voltage in the capacitor C2 gradually develops according to a time constant, the transistor Tr1 turns on when the voltage

  1D base drops below the power level.

  When T is in circuit or passing, the other transistor 25 is also turned on, and so a current passes

  through the lock relay coil 7.

  Referring to Figure 1, the release release commubtatar 40 has a movable contact 5 and two fixed contacts 4 and 6, the movable contact 5 being normally in contact with the fixed contact 6 in a direction tending to unlock the doors. The unlocking switch 41 has a movable contact 9 and two contacts 2 fixed 8 and 10, the movable contact 9 being normally in contact with the fixed contact 10 in a direction tending

lock the doors.

  Therefore, when energized, the locking coil 7 actuates the lock release switch 40 to move the movable contact 5 from the fixed contact 6 to the stationary contact 4 in a direction tending to lock the doors. Accordingly, a current flows from the battery B to the ground 26 by the fixed contact 4, the movable contact 5, the actuating means 12, 13 and 14, the movable contact 9, and the fixed contact 10. Passenger doors and

  two rear doors are all locked.

  On the other hand, in this embodiment, although the lock switch 16 is automatically there; switched off immediately after being released, the actuating means 12, 13 and 14 are kept in operation only during the discharge time of the capacitor C2. Therefore, the capacitor C2 is intended to produce a delay for the switching action of the actuating means when the switch 16 is

switched on or off.

  We will now describe, with reference to FIG.

  the automatic unlocking operation of the doors.

  When the driver or other person operates the unlock button or key inside or outside the vehicle, a normally open unlocking switch 20 is turned on. Accordingly, a circuit is formed between the battery B and the ground 2-7 by the fuse link 1, the ignition switch 2, the

  fuse 3, the diode 33, an unlocking relay coil-

  11, and the unlocking switch 20. When the coil 11 is energized, the unlocking release switch 41 passes from the fixed contact 10 to the fixed contact 8. Therefore, a current flows from the battery B to the mass 26 by the fixed contact 8, the movable contact 9, the actuating means 12, 1-3 and 14, the movable contact 5 and the fixed contact 6 in a direction tending to unlock the doors. So, all the doors

are unlocked. -

  Moreover, in this embodiment, well-he-.

  it is necessary to hold the unlock switch

  While the circuit breakers are fully unlocked, as the time required to unlock the doors is very short, there is no problem even if the driver releases the unlock switch immediately after switching on. of the unlocking switch 20. In addition, two Zener diodes 24 are connected in parallel with the actuating means 12, 13 and 14 to protect them from

  degradation by application of too high voltage.

  We will now describe, with reference to Figure 1, an automatic locking operation of the doors at a certain speed. The automatic door lock mechanism is used to lock the doors when the vehicle reaches a predetermined speed, for example, krn / h, even if the driver forgets

lock the doors.

  In this embodiment, when the vehicle reaches a speed of 1 km / h, a speed switch 19 is automatically turned off, and so a voltage is

  applied to the base of a transistor 28 through a circuit

  bake prevention or chatter cooker 17, which includes a capacitor to allow the base current of the transistor 28 to flow continuously even if the moving contact of the speed switch 19 vibrates on its fixed contact when it is turned on, to introduce an electric noise into the transistor 28. As the switches 18 mounted in the actuating means i 12, 13 and 14 are usually switched on except when the actuating means is in operation, the transistor 28 is turned on. in circuit and controls the first timer 15 in the same way as when the lock switch 16 is turned on, because the transistor 28 and the switches 18 are all connected

  in parallel with the switch 16.

  The main feature of the present invention will be described below, according to which all the doors are automatically unlocked during a

collision.

  If the vehicle experiences an extraordinarily large shock such as a collision, a shock detector 21 closes to operate a second timer 22 which is configured almost in the same circuit as

3C the first timer 15.

  Referring to Figure 3, we will describe

  more detailed operation of the second timer.

  When the unlocking switch 20 is turned on (closed), a current flows from the battery B to the ground 30, through a resistor R'8 and the unlocking switch 21, and a voltage develops in the resistor R '8. As a result, another voltage begins to charge a capacitor CI as the transmitter and the base of the transistor Tr '1 are at almost the same potential when the unlocking switch 21 is halfway down. However, since the voltage in the capacitor C '2 develops gradually according to a time constant, the transistor Tr' goes on to close at the moment when its base voltage drops below the level of transition to closure. When Tr '1 is on, Tr' 2 also becomes on and a current passes through the unlocking relay coil 11 to switch the release release switch 41 from the fixed contact 10 to the fixed contact 8. Therefore, see 1), a current flows from the battery B to ground 26 by the fixed contact 8, the movable contact 9, the actuating means 12, 13 and 14, the movable contact 5 and the fixed contact 6 .Ajns., All doors on the passenger side and at

V back are locked.

  However, in the second timer, when a capacitor C 'is provided at the base of the transistor rs the potential at the base of the transistor Tr'1 increases according to another time constant. Therefore, the transistor Tr'1 automatically switches to the opening after a fixed time. In other words, the second timer 22 is designed to excite the unlocking relay coil 1 1, at a fixed time after the detecBur of

  shock 21 has been switched on for a predetermined period

  completed, for example six seconds, to unlock

  the doors after the shock or the return

  3C. ment. Then, the actuating means 12, 13 and 14 are actuated in the same way as when the unlocking switch 20 is turned on, because the second timer 22 and the shock detector 21 are

  connected in parallel with the de-Lock switch 20.

  As described above, in the automatic door locking system for a motor vehicle according to the invention, as a shock sensor is connected in parallel with the unlock switch for the automatic locking system of doors, by which all doors can be locked / unlocked when the driver operates the internal lock / unlock switch or the external key switch provided on the driver's side, it is possible for the driver or passenger to escape or to be saved from the passenger compartment even after a crash

  traffic such as a collision.

  Of course, the invention is not limited to the embodiment described and shown which has been given by way of example. In particular, it includes all - the means constituting technical equivalents of the means described, as well as their combinations, if they are executed according to its spirit and implemented in

  the framework of protection as claimed.

  1. Automatic door locking system for a motor vehicle, characterized in that it comprises: (a) a number of actuating means (12, 13 and 14) for locking / unlocking the doors;

  (b) a lock switch (16) for locking

  all doors, said switch being provided on the driver's side; (c) an unlocking switch (20) for unlocking all doors, said switch being provided on the driver's side; (d) an excited relay-lock coil (7)

  in response to the operation of said lock switch

  lage; (e) an unlocking relay coil (11) energized in response to the operation of said unlocking switch; (f) a lock release switch (40) actuated by said relay coil (7) to allow current to flow into said actuation means in one direction to lock the doors; (g) an unlocking release switch (41) actuated by said relay coil (11) to allow another current to flow into said actuation means in one direction to unlock the doors; (h) a shock detector (21) connected in parallel with said unlocking valve (20) to energize said coil-release reed (11) so as to

  3C dt'acti?? R-er] edit co,: ', utateur de-1ib, ératictn de dverrouil-

  4 (1); and: nsf, 2., all lr-i The carriers must be in the same position, and the driver must be the same. i3-2I; U 's -uvl - ^: ee / -i: see urú: nce or be saved from the vehicle in case of emergency as in a collision 2. System according to the claim 1, characterized in that it comprises a timer (22) connected in parallel with the unlocking means (20).

  aforementioned and in sero between said unlock switch -

  and the above-mentioned shock detonator (21) for energizing the aforementioned unlatching coil (11) in a fixed time after switching on said shock detector,

for a fixed time.