FR2783550A1 - LOCK WITH AUTOMATIC LOCKING ON OPENING - Google Patents

Abstract

Lock for a motor vehicle door, comprising a bolt (4) capable of retaining a keeper, a pawl (5) for locking the bolt, an opening mechanism comprising at least one actuating means (9) capable of cooperating with the pawl to bring it into a position of release of the bolt, under the action of an internal or external control means, and a locking lever to put the lock in a locked or unlocked position, characterized by the fact that it comprises an automatic unlocking means on opening comprising, on the one hand, a cam follower element (13a) cooperating with a cam profile (4a) provided on the bolt (4) and, on the other hand, a portion support adapted to cooperate with a stop provided on the locking lever, so that, during the rotation of the bolt towards its open position, the cam profile causes a displacement of the cam follower element and, by following, of said support portion so as to automatically bring the lever of c ondamnation in its position of unlocking.

Description

l

  AUTOMATIC UNLOCKING LOCK A

OPENING

  The present invention relates to a lock for a motor vehicle door, in particular a lock with automatic unlocking upon opening, and more particularly an electric lock with assistance in opening and / or in assistance in locking. In electric locks with opening assistance, the

  mechanism for opening the lock is driven by a moto-

  reducer, an electromagnetic system or any other equivalent device which is incorporated in a watertight part of the lock housing, to isolate the electrical components and gears from dust, water and any foreign body which could enter the lock, when using the vehicle. The electric opening assistance mechanism is generally controlled by the handles or external door opening paddles which are equipped with a contactor, sensor, micro-switch or any other detector which is connected by an electric cable to the device. assistance in opening the lock, to transmit the opening order. Since the outer pallets or handles are exposed to the weather, it is necessary to make the opening detectors, as well as their cables and electrical connectors completely waterproof, which

strike the cost of the lock.

  A first object of the invention is to provide an electric lock with assistance in opening which minimizes the electrical connections as well as the sealing constraints, in order to reduce the cost.

of the lock.

  A second object of the present invention is to propose an electric lock with assisted opening, the arrangement of which

mechanisms is perfected.

  For security reasons, the locks on the front and sometimes rear doors are generally equipped with an automatic unlocking mechanism when the user actuates the interior door handle. Indeed, if a user drives in the locked position, for example, so as not to risk being attacked when he stops at the traffic lights, it is important that in the event of an accident, he can easily get out of his vehicle without having to

  unlock the door first, before you can open it.

  Another advantage is that the user, by actuating the interior door handle, causes in one maneuver, both unlocking and opening, while it would be quite unpleasant for a user to be forced to unlock the door before

be able to open it.

  In addition, in the case where the driver of the vehicle, after leaving, closes the door leaving the keys inside, he can io re-enter the vehicle because the door will have been unlocked automatically when opened, this which would not have been the case if the door could be opened from the inside, without unlocking

the lock.

  However, this automatic unlocking function on opening, also known as "override", consumes energy, since the energy required for unlocking is added to the energy required for opening the lock. This energy can be supplied by a manual effort of the user for a fully mechanical lock, or by electric assistance mechanisms for opening and closing.

  unlocking, for an electric lock.

  The third object of the invention is to propose a lock with automatic unlocking upon opening which reduces the energy to

  provide to perform such a function.

  Usually, the locks, both electric and mechanical, comprise a plurality of levers: an external opening lever, an internal opening lever, an internal locking lever, an external locking lever, and one or more intermediate levers. In addition, these levers are connected by connecting means, for example, rods, cables and cable sheaths to control means, such as the lock barrel and

  interior and exterior handles or paddles.

  The fourth object of the invention is to propose a simplified lock for a vehicle door, which minimizes the number of levers and connecting means for performing the various functions of the lock. To achieve the first object mentioned above, the invention has for its first object an electric lock for the door of a motor vehicle, comprising a lock housing of which a first so-called retention compartment contains a bolt capable of retaining a keeper, and a pawl for locking the bolt in the strike retaining position, and a second so-called kinematic compartment sealingly contains a lock locking mechanism comprising a locking lever capable of placing the lock in the locked / unlocked position, and a mechanism opening comprising an electric motor for assistance in opening, capable of driving an external opening lever to actuate the pawl towards its bolt release position, in response to an external opening control signal issued by an external opening switch, when an external control means, such as a handle or an external pallet, is a operated by a user, characterized in that it comprises a mechanical external connection means, an external portion of which is intended to be connected to the external control means and of which another internal portion extends into the second sealed compartment of the lock , said exterior opening contactor being disposed in said second sealed compartment on the path of said interior portion of the mechanical external connection means, so as to emit an external opening control signal, when the mechanical connection means is moved to an opening stroke determined upon actuation of the means of

external control.

  Thus, all the electrical connections between the exterior door handle and the lock are eliminated and it is no longer necessary to seal the contactor, since it is disposed in a

  lock compartment which is already waterproof.

  In a particular embodiment, the interior portion of the mechanical connection means is secured to a cursor which is guided by a slide inside the second sealed compartment, along the opening stroke of the mechanical connection means, and which is able to cooperate at the end of the opening stroke with the contactor, to trigger the emission of the opening control signal to the

electric motor.

  Advantageously, the lock of the invention is associated with a so-called "hands-free" remote recognition system which is intended to power the electric motor, when an authorized user has been

  identified by said recognition system, near the vehicle.

  Such a recognition system is known in itself and consists in providing a badge provided with a transmitter worn by the user and a receiver installed on the vehicle which controls the electrical supply of the

  vehicle when it receives an adequate coded signal from the badge.

  Thus, as soon as the authorized user actuates the exterior handle of 1o door, the opening is triggered automatically, without having

  necessarily triggered the unlocking of the lock beforehand.

  Indeed, the unlocking of the lock can be carried out before, simultaneously or after the electrically controlled opening. Since unlocking the lock is not necessary to cause the opening of the lock from the outside, the opening can be carried out more quickly. The fact that the unlocking of the lock is not necessary is not a drawback, since the direct opening of the lock can only be carried out if an authorized user has been identified by the recognition system, otherwise the electric motor will not be powered, and therefore opening impossible. Unlike known locks, o the action on the external handle first causes unlocking, then opening, the lock of the invention has two parallel kinematic chains,

  one for electric opening, the other for unlocking.

  It will be noted that the opening stroke of the connecting means for triggering the electrical opening may be small, for example, of

around 5 mm.

  According to another characteristic of the invention, the inner portion of the mechanical connection means comprises at its free end a tip capable of pivoting an emergency opening lever, in the event of a power failure or of exhaustion of the vehicle battery , by displacement of said connecting means, under the action of the external control means, on an overtravel beyond the electric opening stroke, said emergency lever being able to move, during said overtravel, the lever external opening, with a view to

release of the bolt.

  Advantageously, the emergency lever is subjected to a return spring with high stiffness towards its rest position, so that the user has to force on the external control means in order to actuate the emergency lever, so that the user does not operate the emergency lever unnecessarily when the electric opening assistance operates. According to yet another characteristic, the locking lever is able to put the aforementioned end piece of the connecting means, when the lock is locked, in a position where the end piece escapes the emergency lever, whatever the movement of the means of connection, and to put said end piece, when the lock is unlocked, in a

  position o it cooperates with the emergency lever during overtravel.

  Advantageously, the connecting means is a flexible cable and the locking lever comprises an arm capable of moving the end of the cable, to modify the path of the cable, so that said end piece

  escapes from the emergency lever when the lock is locked.

  In a particular embodiment, the emergency lever comprises a fork between the branches from which the connecting cable passes, the spacing of the branches being less than the dimension of the end piece, so that the latter can drive the emergency lever , in the unlocked position of the lock. In this case, the branches of the fork may comprise at their free end a guide ramp for guiding the end piece along the path of the cable in its escaped position, when the cable is moved under the action of the means of

external control.

  According to yet another characteristic, the lock comprises an automatic unlocking means upon opening comprising a first lever provided with a cam follower element arranged in the first retention compartment to cooperate with a cam profile provided on the bolt, and a second lever disposed in the second sealed compartment and able to cooperate with a stop provided on the locking lever, so that, during the rotation of the bolt towards its open position, the cam profile causes a displacement of the cam follower element and, consequently, of the second lever which is integral in rotation with the first lever, for automatically bringing

  the locking lever towards its unlocking position.

  In this case, the second lever of the automatic unlocking means upon opening is capable of blocking, in the open position of the bolt, the stop of the locking lever, to prevent the

  locking the lock in the open door position.

  To achieve the aforementioned second object, the invention has as a second object an electric lock for the door of a motor vehicle, comprising a lock housing, a first so-called retention compartment contains a bolt capable of retaining a keeper and a locking pawl of the bolt in the strike retaining position, and of which a second so-called kinematic compartment contains in a sealed manner a locking mechanism comprising a locking lever capable of putting the lock in the locked / unlocked position, and an opening mechanism comprising a electric motor for opening assistance, characterized in that, in the second kinematics compartment, the electric motor is capable of driving in rotation, by means of a gear train, a toothed wheel provided at least one radially eccentric pin, said pin being intended, during the rotation of the wheel, to drive a comm lever ande until a radially eccentric pin on said wheel comes into contact with an elastic end-of-opening stop, the electric power supply to the motor being delayed for a sufficient time, for example 100 ms, to ensure that said pin reaches the elastic stop, said control lever being integral in rotation with an opening lever arranged in the first retention compartment and able to cooperate

  with the ratchet to move it to the bolt release position.

  In a particular embodiment, the gear train comprises a first pinion secured to the motor shaft of the electric motor, and meshing with a second pinion secured to a worm which meshes peripherally with said toothed wheel, said worm end being linked to a spiral return spring which is intended to rotate the worm in the opposite direction, when the motor supply stops, thus causing the crankpin of the wheel to return

toothed in its initial position.

  According to yet another characteristic of the invention, the locking mechanism comprises a second reversible electric motor for assistance in locking / unlocking the lock during a centralized locking or unlocking controlled from the outside or from the inside , the drive shaft of the second electric motor being provided with a pinion meshing with a

  toothed sector of the locking lever.

  Advantageously, the electric motor for opening assistance is intended to drive the opening lever in response to a 1o control signal emitted by an external opening contactor, when an external control means, such as a handful or

  door outer paddle, is operated by a user.

  In this case, the lock may comprise mechanical external connection means, an external portion of which is intended to be connected to the external control means and of which another internal portion extends into the second sealed compartment of the lock, said contactor external opening being disposed in said second sealed compartment on the path of said internal portion of the external mechanical connection means, so as to emit an external opening control signal, when the mechanical connection means is moved over an opening stroke determined during

  actuation of the external control means.

  According to yet another characteristic, the pawl is connected to an interior control means, such as an interior door handle or pallet, by means of a mechanical connection means, such as a cable or a rod, for bring the ratchet into a position

release of the bolt.

  In a particular embodiment, the locking lever comprises three arms, a first arm for putting a mechanical means of connection to an external control means in a locked or unlocked position, a second arm for the possible connection with a lock cylinder , and a third arm for possible connection with an interior operating member of the door. This internal operating member is intended to replace the

  frieze zipper usually used.

  In an alternative embodiment, the opening mechanism comprises an emergency lever for mechanical opening, in the event of an electrical failure or of failure of the vehicle battery, this emergency lever comprising a first branch intended to cooperate with a pin projecting on the control lever and a second branch intended to cooperate with a mechanical means of connection to a means of

  external control, when the lock is in the unlocked position.

  According to yet another characteristic of the invention, the lock comprises an automatic unlocking means upon opening io comprising a first lever provided with a cam follower element disposed in the first retention compartment to cooperate with a cam profile provided on the bolt, and a second lever arranged in the second sealed compartment and able to cooperate with a stop provided on the locking lever, so that, during the rotation of the bolt towards its open position, the cam profile drives a displacement of the cam follower element and, consequently, of the second lever which is integral in rotation with the first lever, to bring automatically

  the locking lever towards its unlocking position.

  In this case, the second lever of the automatic unlocking means upon opening is capable of blocking, in the open position of the bolt, the stop of the locking lever, to prevent the

  locking the lock in the open door position.

  To achieve the aforementioned third object, the invention has as a third object a lock for a motor vehicle door, comprising a bolt capable of retaining a door strike, a latch for locking the bolt in the strike retention position, a mechanism for opening comprising at least one actuating means able to cooperate with the pawl to bring it into a bolt release position, under the action of an internal or external control means, and a locking mechanism comprising a lever for locking the lock in a locked or unlocked position, characterized in that it comprises an automatic unlocking means upon opening comprising, on the one hand, a cam follower element cooperating with a cam profile provided on the bolt and, on the other hand, a support portion capable of cooperating with a stop provided on the locking lever, so that, during the rotation of the bolt towards its posi tion of opening, the cam profile causes a displacement of the cam follower element and, consequently, of said support portion so as to automatically bring the locking lever into its unlocked position. Thus, under the action of the internal or external control means, when the pawl releases the bolt, the latter is driven towards its open position, under the reaction force of the compressed door seal, which automatically causes the unlocking the lock, without having to make an unlocking effort. In fact, when a door is closed, the seals are compressed and exert a reaction force on the bolt of the order of 150 N to 500 N. Therefore, when the pawl releases the bolt, the reaction force of the seal rotates the bolt causing

  the door ajar and, simultaneously, the unlocking.

  The energy stored in the door seals is thus used, which energy was not currently used to unlock the door. Advantageously, in the bolt opening position, the bearing portion of the automatic unlocking means upon opening blocks the stop of the locking lever, which prevents the

  locking the lock in the door open position.

  In a particular embodiment, the automatic unlocking means upon opening comprises a first lever provided with a cam follower pin cooperating with the cam profile of the bolt, and a second lever integral in rotation with the first lever and provided with said support portion able to cooperate with a stop pin

on the locking lever.

  Advantageously, the cam follower pin of the first lever is able to cooperate with a door switch open at the end of the bolt's rotation stroke towards its open position, said door switch open intended to emit a signal corresponding to the information opening the door to a central processing unit, to activate, in a manner known per se, for example, an indicator light on the dashboard of the vehicle or a warning light

interior light.

  Advantageously, the automatic unlocking means upon opening brings the locking lever to the unlocked position,

  before the end of the bolt opening stroke.

  In a particular embodiment, the locking mechanism comprises a reversible electric motor for driving the locking lever between its locked and unlocked positions during a centralized locking or unlocking

  controlled from outside or inside.

  It can also be provided that the lock of the invention is associated with a shock sensor for, upon detection of a shock, send a control signal to the electric motor of the locking mechanism to drive the locking lever towards its position unlocked. Thus, if due to a shock, the door cannot open sufficiently, so that the bolt does not rotate sufficiently to actuate the automatic unlocking means upon opening, the

  lock will still be unlocked.

  According to another characteristic, the aforementioned actuating means comprises a mechanical connection means, such as a cable or a rod, connecting the pawl to an internal control means, by

  example an interior door handle or pallet.

  According to yet another characteristic, the actuating means comprises an external opening lever capable of cooperating with the pawl to bring it into the bolt release position, said external opening lever being capable of being driven by an electric motor for opening assistance, in response to a control signal from an exterior opening contactor, when

  external control means is operated by the user.

  In this case, the lock may comprise mechanical external connection means, an external portion of which is intended to be connected to the external control means and of which another internal portion extends into the second sealed compartment of the lock, said contactor external opening being disposed in said second sealed compartment on the path of said internal portion of the external mechanical connection means, so as to emit an external opening control signal, when the mechanical connection means II is moved over a stroke of opening determined during

  actuation of the external control means.

  To achieve the aforementioned fourth object, the invention has as a fourth object a lock for a motor vehicle door, comprising a bolt capable of retaining a strike, a latch for locking the bolt in the strike retention position, an opening mechanism external to actuate the pawl towards its bolt release position, an external mechanical connection means, an external portion of which is intended to be connected to an external control means, such as an external door handle or pallet, and one of which inner portion extends inside the lock housing and is capable of actuating the exterior opening mechanism to cause the opening of the lock, in response to actuation of the exterior control means, and a locking mechanism comprising a bi-stable locking lever for putting the lock in a locked or unlocked position, characterized in that the locking lever ndamnation is able to modify the path of the inner portion of the mechanical connecting means for, in the locking position of the lock, to escape said inner portion of the mechanical connecting means to the external opening mechanism and, in the unlocking position of the lock, put the inner portion of said mechanical connecting means in a position of

  cooperation with the external opening mechanism.

  Advantageously, the mechanical external connection means is a flexible cable comprising at the free end of its internal portion a ferrule which is capable of being moved by an arm of the locking lever in a direction substantially perpendicular to the direction of movement of the cable. The external opening mechanism may comprise an actuating lever provided, at one end, with a fork between the branches from which the internal portion of the cable passes, in the unlocking position of the lock, the spacing of the branches being smaller than the size of said end piece so that the latter can drive said actuating lever, the inner portion of the cable and its end piece escaping

  to said fork in the locking position of the lock.

  Thus, the flexibility inherent in the connecting cable is used to disengage the connection between the external control means and the

  external opening mechanism, for locking the lock.

  When the locking lever is brought back from its locked position to its unlocked position, the cable returns, due to its own elasticity, to its position engaged with the fork of the

actuation lever.

  In this case, the branches of the fork may comprise, at their free end, a guide ramp to guide the end of the cable in its escaped locking position, when the cable undergoes

  0o traction under the action of the external control means.

  According to another characteristic, the lock comprises an automatic unlocking means upon opening comprising, on the one hand, a cam follower element cooperating with a cam profile provided on the bolt and, on the other hand, a portion of support able to cooperate with a stop provided on the locking lever, so that, when the bolt rotates towards its open position, the cam profile causes a displacement of the cam follower element and, consequently, of said support portion so as to automatically bring the lever

  conviction in its unlocked position.

  In a particular embodiment, the inner portion of the mechanical connection means is integral with a cursor which is guided by a slide inside a sealed compartment of the lock, along the opening stroke of the means mechanical link, and which is able to cooperate at the end of the opening stroke with an external opening switch, to trigger the emission of an opening control signal to an electric motor for assistance with opening, which electric motor is capable of driving a lever

  opening to activate the pawl.

  According to another characteristic of the invention, said actuating lever is an emergency opening lever, in the event of an electrical failure or of exhaustion of the vehicle battery, capable of being moved by the connecting means, under the action of the external control means, on an overtravel beyond the opening stroke necessary to actuate the contactor, said emergency lever being able to move, during said overtravel, the opening lever

  outside, for the release of the bolt.

  Advantageously, the emergency lever is subjected to a return spring with high stiffness towards its rest position, so that the user has to force on the external control means in order to actuate the emergency lever, so that the user does not operate the emergency lever unnecessarily when the electric opening assistance operates. In a particular embodiment, the locking mechanism comprises a reversible electric motor for driving the locking lever between its locked positions and

o0 unlocked.

  The four objects of the invention can be taken alone or in combination

  combination with each other.

  The description given below, purely by way of illustration and not

  limiting, of an embodiment will allow, with reference to the drawings

  appended, to better understand the invention.

  In this drawing: - Figure 1 is an exploded perspective view of the lock according to the invention, from the side of its retention compartment; - Figure 2 is a view similar to Figure 1, but partially assembled; - Figure 3 is a top view of Figure 2, in the fully assembled position of the lock; - Figure 4 is a view similar to Figure 3, the plate against being omitted; - Figure 5 is an exploded perspective view of the lock of the invention, from the side of its kinematics compartment; - Figure 6 is a top view of Figure 5, the cover of the kinematics compartment being omitted, and the lock being in a closed and unlocked position; - Figure 7 is a view similar to Figure 6, but showing the lock in a closed and locked position; - Figure 8 is a view similar to Figure 6, but showing the lock in an open and unlocked position, under the action of the electric device for opening assistance; and - Figure 9 is a view similar to Figure 8, the lock also being in the open and unlocked position, under the action of

  mechanical means for emergency opening.

  Referring to Figure 1, the lock of the invention comprises a lock housing B, for example, of plastic material and a metal counterplate 1 substantially square-shaped and having an opening 2 for the passage of a keeper (not shown) which is fixed, in a manner known per se, to a vertical post of the chassis of a motor vehicle. The counterplate 1 has a substantially L-shaped profile, the longer wing of which extends in the transverse direction of the vehicle, in the closed door position, and the more

  small wing 1b extends in the longitudinal direction of the vehicle.

  As can be seen in FIG. 1, the housing B has a substantially rectangular rectangular shape, the largest dimension of which extends substantially in the vertical direction of the door. The housing B has a first compartment 3 called retention, because it contains a fork bolt 4 capable of retaining the keeper and

  a pawl 5 to lock the bolt 4 in the strike retainer position.

  The retention compartment 3 has a recess 6 forming the opening of the lock, to accommodate the keeper there, in the closed position of the door. The compartment 3 is closed by the counter plate 1 which is the part of the lock which is flush with the edge of the door. The bolt 4 and the pawl 5 are respectively articulated on the ends of the shaft 7 and 8 which are interposed between the bottom of the compartment 3 and the

part 1a of the counterplate 1.

  The retention compartment 3 further comprises an external opening lever 9 which is articulated on a cylindrical sleeve 10 on the bottom of the compartment 3, the external opening lever 9 comprising an arm 9a extending substantially radially to come cooperate with a finger 5a of the pawl 5. The external opening lever 9 has a passage of square section 9b in alignment with the axis of the cylindrical sleeve 10, to make it integral in rotation with a control lever 11 which will be described in more detail with reference to the

figure 5.

  The pawl 5 further comprises a protruding pin 5b intended to be connected to a rod or to a cable (not shown) for its connection to a

  interior door handle or pallet.

  As best seen in Figures 1 and 4, a light 12 is formed through the bottom of the compartment 3 in the vicinity of the periphery of the bolt 4. Inside this light 12, is able to pivot a lever 13 provided at its free end of a protruding pin 13a which forms a cam follower element in contact with a peripheral portion 4a on the periphery of the bolt, this peripheral portion 4a forming a cam profile whose radius of curvature is adapted to cause the displacement of the pin 13a, during the rotation of the bolt 4 between its closed position illustrated in FIGS. 1 to 4 and its

  open position (not shown) rotated counterclockwise.

  An open door switch 14 is mounted on the bottom of the compartment 3 near the protruding pin 13a of the lever 13, so that at the end of the pivoting stroke of the bolt 4 towards its open position, the pin 13a comes to push a contactor button 14a

  14, to trigger the emission of a door open signal.

  In a manner known per se, the drain 6 has an elastic tab 6a which is intended to dampen the entry of the keeper in the drain. We will now refer to FIG. 5, to describe the components of a second compartment 15 known as the kinematics of the lock housing B. This second compartment 15 is sealed from compartment 3 by a partition which forms the bottom

common to both compartments.

  The control lever 11 has a pin 11a which projects perpendicularly towards the bottom of the compartment 15 and which is inserted through the cylindrical sleeve 10 of the first compartment 3, this pin 11a having at its free end a square section for fitting into the corresponding square section opening 9b of the external opening lever 9, for their

joining in rotation.

  The second compartment 15 contains a first electric motor 16 on the motor shaft of which is coaxially mounted a first pinion 17 which meshes with a pinion of larger diameter

  18 which is coaxially integral in rotation with an endless screw 19.

  The assembly 16 to 19 forms a geared motor group which is carried by support bearings 20, 21, which are anchored on the bottom of the compartment 15. The worm 19 meshes with the circumference of a toothed wheel 22 which has on its upper face an end of axis 22a intended to be inserted in a suitable housing in the cover (not shown) for closing the second compartment 15. By its lower face, the toothed wheel 22 is connected to a plate 23, by two crank pins 24, 25 diametrically opposite with respect to the axis of rotation of the wheel 22. The plate 23 further comprises a finger 23a perpendicularly projecting from its plane and coming to be embedded in the underside of the wheel 22. This finger 23a is radially more eccentric than the crank pins 24 and 25. Although this is not visible in FIG. 5, the plate 23 has on its underside an end of an axis aligned with the end of an axis 22_ of the wheel 22, and intended to come

  fit into a suitable housing 26 in the bottom of compartment 15.

  One of the two aforementioned crankpins, namely the crank pin 24 furthest from the finger 23a of the plate 23, is intended to cooperate with an arm ilb of the control lever 11, to drive it in rotation, during 2o of the rotation of the wheel 22. The rotation of the control lever 11 simultaneously causes the rotation of the external opening lever 9 in the retention compartment 3, to move the pawl 5 towards the bolt release position. The rotation of the wheel 22 continues until the finger 23a of the plate 23 comes into contact with an elastic limit stop 27 provided on the bottom of the compartment 15. This stop 27 is advantageously made of rubber, to cushion pressing finger 23a against this stop 27, because

  the drive by the motor 16 is relatively powerful.

  Although not shown, the control lever 11 is subjected to a return spring, to return the lever

  command 11 to its initial position, once the motor assembly

  the reducer itself has returned to its initial position as will be explained later. A rubber stop 28 can also be provided in the compartment 15 to dampen the return of the control lever 11 to its rest position, as visible in FIGS. 6 to 9. The control lever 11 has at the free end of another arm, extending substantially in the direction opposite to the released arm, a pin 30 intended to cooperate with a downwardly curved tab 31 provided at the free end of an arm of an emergency lever 32. The lever spare 32 is pivotally mounted on a shaft end 33 projecting from the bottom of the compartment 15 and comprises at the free end of another arm 34, arranged substantially in a direction opposite to the arm carrying the folded tab 31, a fork 35 of which the two branches

  are provided at their free end with a guide ramp 35a.

  As can be seen in FIG. 6, a cable C passes between the branches of the fork 35 and has at its free end a tip 36 which has a substantially spherical shape whose diameter is greater than the spacing of the branches of the fork 35, so as to be able to cause the emergency lever 32 to pivot about its axis 33, by pulling on the cable C, from an external control means, for example an exterior door handle or pallet. The cable C is integral with a slider 37 arranged on the other side of the fork 35, relative to the end piece 36. The slider 37 can advantageously be molded onto the cable C. Two parallel guide rails 38, 39 are arranged on the bottom of the compartment 15 to serve for guiding the cursor 37 during the movement of the cable C. The cable C extends outside of the housing B, crossing, so

waterproof, a sleeve 40.

  The kinematics compartment 15 further comprises a locking lever 41 which is articulated on a shaft end 42 projecting from the bottom of the compartment 15. The locking lever 41 comprises a first arm 43 provided at its free end with a pin 43a which engages in a helical groove 44a formed on a rotary barrel 44. This rotary barrel 44 is intended to be connected to a lock barrel, for a front door. The locking lever 41 comprises a second arm 45 extending substantially radially

  towards the outside of the housing B, through an opening 46.

  The locking lever 41 has a third arm 47 which is intended to cooperate with the end piece 36 of the cable C, to make it escape the fork 35, as visible in FIG. 7. In the rest position of the cable C, the tip 36 is located in a recess of the locking lever 41 defined between the first arm

43 and the third arm 47.

  The locking lever 41 further comprises a toothed sector 48 which is extended at one end by a projecting stop 49. The toothed sector 48 meshes with a pinion 50 carried by the motor shaft 51 of a second electric motor 52 for electric assistance for locking / unlocking. The second electric motor 52 is carried by a support piece 53 having a substantially C-shaped profile,

  which is mounted on the bottom of compartment 15.

  The stop 49 of the locking lever 41 is intended to cooperate with a second lever comprising an arm 54 extending radially from a shaft 55 which is mounted in a tubular sleeve 56 which projects from the bottom of the compartment 15. The shaft 55 crosses, in leaktight manner, the bottom of the compartment 15 and has at its lower end a square section to be secured in rotation

lever 13 above.

  Along the rail 39, an external opening contactor 60 is arranged which comprises a button 60a capable of being pushed back by an inclined face 37a of the cursor 37, when pulling the cable C, to send an opening control signal to the first motor 16, by

  an electrical connection not shown.

  The lock which has just been described in connection with the appended drawing

  incorporates the four objects of the invention taken in combination.

  However, the various objects of the invention can be taken alone or

  in combination with each other.

  For example, for the first object of the invention, one could alternatively provide an exterior door handle linked by a rod to a link rod articulated in the sealed compartment of the lock, the exterior opening contactor being arranged to detect

the pivoting of this link.

  For the fourth object of the invention, provision could be made, for a lock with mechanical opening, to replace the emergency lever with an external opening lever acting directly or

indirectly on the ratchet.

  We will now describe the operation of the lock

  the invention with reference to Figures 4 to 9.

  In the position illustrated in Figure 6, the lock is in its closed state and mechanically unlocked. In fact, the locking lever 41 is in a position where its arm 47 has placed the end piece 36 of the cable C opposite the fork 35 of the emergency lever 32, which allows mechanical opening, by pulling on the cable C , as

explained further.

  In this closed position of the lock, it can be seen in FIG. 4 that one of the branches of the fork of the bolt 4 is blocked by

  a spout of the pawl 5, for retaining a keeper not shown.

  From the position illustrated in FIG. 6, when the user wishes to lock the lock, several possibilities are available to him: either he is inside the passenger compartment of the vehicle and he actuates an operating member located on the inside of the door to control the movement of the arm 45 of the locking lever 41; - either the user is outside the vehicle and he locks the lock with his key by introducing it into the lock cylinder of a front door to drive, through the barrel 44, the movement of the arm 43 of the locking lever; - or, finally, from outside the vehicle, it actuates a portable remote control unit to send a condemnation control signal to the electric motor 52 for assisting with locking, which motor 52 causes the locking lever 41 to pivot,

  by acting on the toothed sector 48.

  Whatever the means for controlling the locking of the lock, the locking lever 41 pivots counterclockwise, as illustrated in FIG. 7. In this figure, the lock is in its closed state and mechanically locked, because the arm 47 of the locking lever 41 has pushed the end piece 36 of the cable C in a direction substantially perpendicular to the actuating stroke of the cable C, so as to cause the end piece 36 to escape from the fork 35 of the emergency lever 32 Thus, if an unauthorized person fully actuates the exterior door handle, to drive the cable C, the end piece 36 will slide along the arm 47 and the guide ramp 35a of the fork 35, without driving the lever. reserve 32, the lock thus not being able to be mechanically unlocked from the outside. When the cable C is moved under the action of the exterior door handle, the cursor 37 linked to the cable C will move along the guide rails 38 and 39 and will come by its inclined face 37a to push the switch button 60a from the exterior opening switch 60, but since the general power supply of the vehicle has not been activated, the electric motor 16 for opening assistance will remain inactive,

  thus also prohibiting electric opening.

  It can be seen, in FIG. 7, that in the locked position of the lock, the stop pin 49 of the locking lever 41 comes into contact with the arm 54 of the automatic unlocking means upon opening. When the user wishes to return to the position of FIG. 6, he actuates one of the aforementioned control means to rotate the locking lever 41 clockwise from FIG. 7 to FIG. 6. In this case, the end 36 of cable C follows the pivoting of the arm 47 of the locking lever 41, because it is recalled by its own elasticity

  of the cable C in its rest position illustrated in FIG. 6.

  We will now describe the passage of the lock from its unlocked closed position illustrated in FIG. 6 to its open position, thanks to the electric device for assisting the opening, in FIG. 8. Thus, when the user grasps the handle outside of the door and actuates it slightly, the cable C moves over a short stroke, as illustrated between FIGS. 6 and 8. At the end of the actuation stroke of the cable C, the end piece 36 of the cable comes into contact at most with the fork 35 of the emergency lever, without actuating the latter. The cursor 37 which is integral with the cable C moves with a corresponding stroke and retracts the button 60a of the contactor 60. Since the general power supply of the vehicle will have been previously energized by the recognition system, the contactor 60 can send an opening control signal to the electric motor 16 which drives the rotation of the wheel 22 clockwise. During the rotation of the wheel 22, the crank pin 24 bears against the arm 1 lb of the control lever 11 and pushes it back, so as to rotate the control lever 11 counterclockwise in FIG. 5 The crank pin 24 pushes the arm 1b of the control lever 11 until the finger 23a comes to bear against the elastic end stop of

race 27.

  The pivoting of the control lever 11 causes the pivoting of the external opening lever 9 in the retention compartment 3, clockwise in FIG. 4. When it is pivoted, the external opening lever 9 is pushed back by its arm 9a the finger 5a of the pawl 5 to rotate the pawl 5 which anti-clockwise

  thus releases the bolt 4 which can pivot, in turn, in the anti-

hourly to release the door release.

  o When the finger 23a comes to bear against the stop 27, the pawl will have released the bolt 4. The driving torque exerted by motor 16 will be maintained for a period determined by a time delay, to ensure that

  the crank pin 24 does indeed pivot the control lever 11.

  As soon as the drive by the motor 16 stops, the worm 19 will be returned in rotation in opposite direction, by a spiral spring (not shown), to bring back the wheel 22 and therefore, the crank pins 24 and 25

  in their initial positions, to allow later opening.

  The spiral spring is linked to the worm 19 and is wound up during the drive by the motor 16. Advantageously, the spiral return spring for the worm 19 is arranged in the bearing 20. In this configuration , the control lever 11 returns to its position

  rest under the action of a not shown return spring.

  Referring again to FIG. 4, when the bolt 4 rotates counterclockwise to release the keeper, the cam follower pin 13a of the lever 13 follows the cam profile 4a of the bolt 4, which causes the

  pivoting of the lever 13 clockwise in FIG. 4.

  Significantly at the end of the pivoting stroke of the bolt 4, the pin 13a of the lever 13 pushes the button 14a of the open door contactor 14 to signal to a central processing unit the opening of the door. The pivoting of the lever 13 causes the simultaneous pivoting of the arm 54 in the kinematics compartment 15 counterclockwise, as shown in FIG. 8, to bring the arm 54 of this lever into contact with the stop 49 of the lever.

conviction 41.

  Thus, it is not possible to lock the lock, while the door is open, because any pivoting of the locking lever 41 in the counterclockwise direction is prevented by the arm 54 which is locked in position by the lever 13 whose the cam follower pin 13a is in abutment against the cam profile 4a of the bolt 4. The electric device for assisting the opening operates in the same way from the position of FIG. 7, in which the lock is in its closed and mechanically condemned state. To this end, the authorized user wearing a badge provided with a transmitter for transmitting a determined coded signal, approaches the vehicle which is provided with a recognition system comprising a receiver capable of decoding the signal and turning on the power the vehicle's power supply, when the authorized user has been duly identified. When the user pulls on the cable C on a short stroke to trigger the emission of an opening control signal by the contactor 60, the electric motor 16 causes the lock to open, and the bolt 4 by its cam profile 4a causes the arm 54 to pivot anticlockwise to push the stop pin 49 of the locking lever 41, by pivoting the latter clockwise, to bring it into a unlocked position. In other words, from FIG. 6 or from FIG. 7, one arrives at the same position shown in FIG. 8, when the opening assistance device is activated. An automatic unlocking is thus obtained on opening, when the external control means are actuated. This is made possible by the fact that the two kinematic chains have been dissociated from the

  opening mechanism and locking mechanism.

  The contactor 60 sends a control signal simultaneously to the motor 16 and to the motor 52, to simultaneously cause assistance in the opening of the door and unlocking of the others.

doors.

  Finally, if the opening assistance device does not work, due to an electrical failure or insufficient supply of the vehicle battery, the user can mechanically open the lock after having unlocked it mechanically, for example, by the lock barrel, by pulling on the cable C on an overtravel, in order to drive, thanks to the end piece 36, the fork 35 of the emergency lever 32 which pivots clockwise in FIG. 9 and repels by the curved tab 31 of its opposite arm the pin 30 of the control lever 11, to rotate it counterclockwise, which causes the pivoting of the external opening lever 9, and consequently, the release of the bolt. Likewise, the arm 54 comes into contact with the stop 49 of the locking lever 41, due to the cooperation between the cam profile 4a of the bolt 4 and of the follower pin of

cam 13a of lever 13.

  It should be noted that the crank pin 25 shown in Figure 5 does not

  io presents no particular utility here.

  The electric motor 52 is reversible, in order to pivot the locking lever 41 in both directions, to bring it

  respectively in its condemned or unlocked position.

  The motor shaft 51 of the electric motor 52 has its axis of rotation parallel to the pivot axis of the locking lever 41, while the motor shaft of the electric motor 16 has its axis of rotation

  perpendicular to the axis of the opening lever 9.

  Although the invention has been described in connection with a particular embodiment, it is obvious that it is in no way limited thereto and that it includes all the technical equivalents of the means described as well as their combinations if these are within the scope of the invention.

Claims (10)

  1. Lock for a motor vehicle door, comprising a bolt (4) capable of retaining a door strike, a pawl (5) for locking the bolt in the strike retention position, an opening mechanism comprising at least one means actuator (9) able to cooperate with the pawl to bring it into a bolt release position, under the action of an internal or external control means, and a locking mechanism comprising a locking lever (41 ) to put the lock in a locked or O10 unlocked position, characterized in that it comprises an automatic unlocking means upon opening comprising, on the one hand, a cam follower element (13a) cooperating with a profile of cam (4a) provided on the bolt (4) and, on the other hand, a bearing portion (54) able to cooperate with a stop (49) provided on the locking lever (41), so that, when from the rotation of the bolt to its open position, the profile of cam causes displacement of the cam follower element and, consequently, of said support portion so as to automatically bring the locking lever into its unlocked position. 2. Lock according to claim 1, characterized in that, in the opening position of the bolt (4), the bearing portion (54) of the automatic unlocking means upon opening blocks the stop (49) of the locking lever (41), which prohibits the locking of   the lock in the door open position.   3. Lock according to claim 1 or 2, characterized in that the automatic unlocking means upon opening comprises a first lever (13) provided with a cam follower pin (13a) cooperating with the cam profile (4a ) of the bolt (4), and a second lever (54) integral in rotation with the first lever and provided with said bearing portion capable of cooperating with an abutment pin (49) on the lever conviction (41).   4. Lock according to claim 3, characterized in that the cam follower pin (13a) of the first lever (13) is able to cooperate with an open door contactor (14) at the end of the bolt rotation stroke (4 ) towards its open position, said open door contactor being intended to emit a signal corresponding to the information   door opening to a central processing unit.   5. Lock according to one of claims 1 to 4, characterized by   the fact that the automatic unlocking means upon opening brings the locking lever (41) to the unlocked position, before   the end of the bolt opening stroke (4).   6. Lock according to one of claims 1 to 5, characterized by   the fact that the locking mechanism comprises a reversible electric motor (52) for driving the locking lever (41) io between its locked and unlocked positions, during a centralized locking or unlocking controlled from the outside or from the inside.   7. Lock according to claim 6, characterized in that it is associated with a shock sensor for, upon detection of a shock, i5 send a control signal to the electric motor (52) of the locking mechanism for drive the locking lever   (41) towards its unlocked position.   8. Lock according to one of claims 1 to 7, characterized by   the fact that the aforementioned actuating means comprises a mechanical connection means, such as a cable or a rod, connecting the pawl (5) to an internal control means, for example a handle or interior door pallet.   9. Lock according to one of claims 1 to 8, characterized by   the fact that the actuating means comprises an external opening lever (9) able to cooperate with the pawl (5) to bring it into the bolt release position, said external opening lever being able to be driven by an electric motor (16) for opening assistance, in response to a control signal emitted by an external opening contactor (60), when a control means   outside is operated by the user.   10. Lock according to claim 9, characterized in that it comprises a mechanical external connection means (C) of which an external portion is intended to be connected to the external control means and of which another internal portion extends in the second sealed compartment (15) of the lock, said external opening contactor (60) being disposed in said second sealed compartment on the path of said inner portion of the mechanical connection means   external (C), so as to emit an external opening control signal, when the mechanical connection means is moved over an opening stroke determined when the external control means are actuated.