EP3149262B1 - Lock for a motor vehicle - Google Patents

Description

The present invention relates to a lock for a motor vehicle.

A lock of a motor vehicle is intended to be mounted on an opening of a motor vehicle and typically comprises a bolt for pivoting around a striker fixed to the structure of the motor vehicle to ensure the closing of the opening. The opening of the opening is performed by a rotation of the bolt in the opposite direction. Under normal conditions of use, the rotation in the opposite direction, called "opening direction of the leaf", is achieved by the movement of the outer handle which is connected to the lock by a control means which acts on a opening said lever outside to rotate the latter which releases in turn the bolt via a shackle in the desired direction.

However, in the event of a side impact, the inertial force exerted on the opening can exert sufficient traction force on the control means and act on the opening lever to control the opening of the lock and thus the release of the door. 'opening.

To avoid this, there are locks configured to not have kinematic movement during a shock or to inhibit the effect of movement. Thus, it is proposed solutions for blocking the drive train by resistant force, such as springs, or by blocking. This last solution allows a better robustness of the lock vis-à-vis the different families of shock.

The lock lock can be achieved by an external obstacle causing a deformation, due to a temporary or permanent inertial movement, with a possibility of restoration to the post-shock state in the latter case.

Blocking by external obstacle is typically achieved by a system that intervenes by deformation of the door. If a deformation is greater than a threshold value, then there is an external obstacle to the lock that blocks the movement of the opening chain.

The locking instruction typically comes from deformation of the vehicle sheet. The deformation of this sheet will come to position an obstacle belonging either to the lock or the sheet metal, opposite the opening lever outside. The lever intervenes directly in the opening of the lock, the latter can not be done.

However, such a system requires an adaptation to the geometry of the door, a deformation of said door, an insensitivity to the movement of the handle and the impossibility opening the door after the shock.

There is the temporary blocking by inertial movement realized by a system that reacts to an abnormal acceleration of the lock. If the value and duration of the acceleration are greater than a threshold value, then a link moves to block the opening or to disengage the movement.

In these designs, a spring-loaded shim is typically attached to the outer opening lever. Inertial force moves said shim to the side during movement of said lever. A chute receives the hold and prevents it from going back down while the outside opening lever is activated. The external opening lever can not be activated, there is no opening. In these designs, the shim returns to its initial position when returning to the rest position of the opening lever. Such a lock is for example known from the document DE 195 11 651 A . However, such a system requires a good knowledge of the shock, including the movement of the handle in case of shock and adjustment of the synchronization of adjustment movements.

An object of the invention is to provide a lock for a motor vehicle that allows to prohibit the outer or inner opening under the effect of an inertial force, whether single or multiple, applied to the lock during a car accident, while allowing, once the inertial force back to zero, the reopening of the lock without the disadvantages of the prior art.

• un levier d'ouverture dudit ouvrant destiné à permettre l'ouverture de l'ouvrant,
• un moyen de blocage configuré pour prendre une position active de blocage dans laquelle ledit moyen de blocage vient bloquer ledit levier d'ouverture et une position de repos dans laquelle ledit moyen de blocage autorise le mouvement dudit levier,- un moyen de retour élastique de blocage configuré pour faire passer ledit moyen de blocage de la position de repos à la position active de blocage, et
• un moyen déclencheur configuré pour prendre une position de repos dans laquelle ledit moyen déclencheur bloque le moyen de blocage dans sa position de repos et une position active de déblocage dans laquelle ledit déclencheur libère ledit moyen de blocage pour que ce dernier passe de la position de repos à la position active de blocage, le moyen déclencheur étant agencé pour se mouvoir sous l'effet d'une force inertielle appliquée à la serrure durant un accident, le levier d'ouverture comportant un moyen d'entraînement configuré pour amener le moyen de blocage de la position active de blocage à la position de repos lorsque le levier d'ouverture pivote vers le sens de l'ouverture de l'ouvrant.

For this purpose, the invention relates to a lock for an opening of a motor vehicle comprising:

• a lever for opening said opening intended to allow the opening of the opening,
• blocking means configured to take an active locking position in which said blocking means blocks said opening lever and a rest position in which said blocking means allows the movement of said lever, - a resilient locking return means configured to pass said locking means from the home position to the active blocking position, and
• a triggering means configured to assume a rest position in which said triggering means blocks the locking means in its rest position and an active unlocking position in which said trigger releases said blocking means for the latter to move from the rest position at the active blocking position, the triggering means being arranged to move under the effect of an inertial force applied to the lock during an accident, the opening lever comprising a drive means configured to bring the means for blocking the active blocking position at the rest position when the opening lever pivots towards the opening direction of the leaf.

The lock of the present invention thus provides for effective blocking of the door and to prevent the opening of the lock for movement of the opening lever. Said lock has the advantage of being able to return the locking system to the initial position under the effect of a simple pulling operation of the opening lever after the impact.

Such a locking system is advantageously independent of the geometry of the door, the movement of the handle, does not generate stress on the kinematic chain, does not require delicate adjustment and is independent of geometric constraints.

• la came du levier d'ouverture supporte le moyen d'entraînement sous la forme d'une excroissance;
• la came du levier d'ouverture comporte une excroissance, de type crochet, formée par une butée de structure définissant un renfoncement destiné à recevoir une partie de moyen de blocage lorsque cette dernière est en position active de blocage de sorte à bloquer le mouvement du levier d'ouverture ;
• le moyen de blocage comporte au moins un bras élastique configuré pour modifier la longueur du moyen de blocage afin de désengager le moyen de retour élastique par rapport au moyen de blocage ;
• le moyen de retour élastique de blocage comporte une première extrémité apte à venir sous une butée appartenant au moyen de blocage et une deuxième extrémité apte à être fixée sur un élément fixe de la serrure ;
• le moyen de blocage comporte une rampe permettant au moyen de retour élastique de blocage de revenir sous la butée lorsque ledit moyen de blocage est de retour en position de repos, notamment lorsque ledit moyen de blocage passe de la position active de blocage à la position de repos, ce qui permet de réactiver le moyen de retour élastique de blocage par rapport au moyen de blocage ;
• l'excroissance est configurée pour recevoir l'extrémité du moyen de retour élastique de blocage et pour entrainer cette dernière sous la butée du moyen de blocage lorsque le moyen de blocage a été amené en position de repos ;
• le moyen de blocage comporte une patte élastique en butée contre un élément fixe de la serrure et destinée à exercer une force de rappel sur le moyen de blocage lorsque ce dernier est en position active de blocage ;
• le moyen déclencheur est associé à un moyen de retour élastique de déblocage configuré pour permettre le passage du moyen déclencheur de la position active de déblocage à la position de repos;
• le moyen déclencheur est mobile en translation par l'intermédiaire du moyen de retour élastique, tel qu'un ressort en compression, fixé au moyen déclencheur et à un élément fixe de la serrure ;
• le moyen déclencheur comporte une excroissance venant sensiblement dans ou sur une encoche complémentaire présente dans le moyen de blocage ;
• le moyen de blocage est disposé dans la serrure en position de repos de sorte qu'à chaque rotation du levier d'ouverture dans le sens de l'ouverture de l'ouvrant et lorsque le moyen de blocage est en position de repos, le moyen de blocage et le levier d'ouverture viennent en contact, ce qui permet qu'à chaque ouverture, un faible mouvement du moyen de blocage, du moyen de retour élastique de blocage, du moyen déclencheur et du moyen de retour élastique du moyen déclencheur.

According to preferred embodiments, the lock for a motor vehicle according to the invention comprises one or more of the following characteristics, taken separately or in combination:

• the cam of the opening lever supports the drive means in the form of a protrusion;
• the cam of the opening lever comprises a protuberance, of hook type, formed by a structural abutment defining a recess for receiving a part of locking means when the latter is in the active locking position so as to block the movement of the lever opening;
• the locking means comprises at least one elastic arm configured to modify the length of the locking means in order to disengage the elastic return means with respect to the locking means;
• the elastic spring locking means comprises a first end adapted to come under a stop belonging to the locking means and a second end adapted to be fixed on a fixed element of the lock;
• the blocking means comprises a ramp allowing the elastic locking return means to return under the abutment when said locking means is returned to the rest position, in particular when said blocking means moves from the active blocking position to the position of rest, which allows to reactivate the locking spring return means relative to the locking means;
• the protuberance is configured to receive the end of the locking elastic return means and to drive the latter under the abutment of the locking means when the locking means has been brought into the rest position;
• the locking means comprises an elastic lug abutting against a fixed element of the lock and intended to exert a restoring force on the locking means when the latter is in the active locking position;
• the triggering means is associated with an unlocking elastic return means configured to allow the passage of the triggering means from the active unlocking position to the rest position;
• the triggering means is movable in translation through the elastic return means, such as a compression spring, fixed to the triggering means and to a fixed element of the lock;
• the triggering means comprises an outgrowth coming substantially in or on a complementary notch present in the locking means;
• the locking means is arranged in the lock in the rest position so that at each rotation of the opening lever in the opening direction of the opening and when the locking means is in the rest position, the means blocking and the opening lever come into contact, which allows that at each opening, a small movement of the locking means, the resilient locking spring means, the triggering means and the elastic return means of the triggering means.

The invention also relates to a motor vehicle having an opening and a lock for opening and closing said opening.

• la figure 1 est une vue partielle du dessus d'un véhicule soumis à un choc latéral ;
• les figures 2 à 4 sont des vues de face et en perspective d'un mode de réalisation d'une serrure de l'invention ;
• la figure 5 est une vue schématique partielle de face d'une variante du mode de réalisation des figures 2 à 4 comprenant une patte élastique agissant sur le moyen de blocage ;
• Les figures 6a à 6f sont des vues en face du mode de réalisation des figures 2 à 4 en fonctionnement.

Other advantages and characteristics will appear on reading the description of the invention given by way of example, as well as on the appended figures in which:

• the figure 1 is a partial view of the top of a vehicle subject to a side impact;
• the Figures 2 to 4 are front and perspective views of an embodiment of a lock of the invention;
• the figure 5 is a partial schematic front view of a variant of the embodiment of the Figures 2 to 4 comprising an elastic tab acting on the blocking means;
• The Figures 6a to 6f are views opposite the embodiment of the Figures 2 to 4 Operating.

The lock of the invention comprises two types of opening lever: an intermediate opening lever and an external opening lever. The external opening lever is connected via a cable, such as the Bowden cable, or a rod to the outer handle and the intermediate opening lever is connected to other kinematic elements of the motor vehicle located inside said vehicle, such as the inner handles.

As shown on the figure 1 , the lock of the invention 1 is adapted to open any type of opening of a motor vehicle, in particular a side door 2.

On this figure 1 is illustrated an example of side impact in a direction 3 substantially perpendicular to the main axis 4 of the motor vehicle 5. The shock may be generated by any kind of element, here is shown a motor vehicle 6. Such a shock acts on the handle in the direction of the opening of the latter in an oscillating movement comprising one or more phases in which the rod or the cable are pulled thereby causing the opening of the lock.

• un levier d'ouverture 10 destiné à permettre l'ouverture de l'ouvrant 2,
• un moyen de blocage 12 configuré pour prendre une position active de blocage dans laquelle ledit moyen de blocage 12 vient bloquer ledit levier d'ouverture 10 et une position de repos dans laquelle ledit moyen de blocage 12 autorise le mouvement dudit levier 10,
• un moyen de retour élastique de blocage 14 configuré pour faire passer ledit moyen de blocage 12 de la position de repos à la position active de blocage, et
• un moyen déclencheur 16 configuré pour prendre une position de repos dans laquelle ledit moyen déclencheur 16 bloque le moyen de blocage 12 dans sa position de repos et une position active de déblocage dans laquelle ledit moyen déclencheur 16 libère ledit moyen de blocage 12 pour que ce dernier passe de la position de repos à la position active de blocage.

As shown schematically on Figures 2 to 5 said lock 1 comprises a locking system comprising:

• an opening lever 10 for opening the opening 2,
• a blocking means 12 configured to take an active blocking position in which said blocking means 12 blocks said opening lever 10 and a rest position in which said blocking means 12 allows the movement of said lever 10,
• resilient locking return means 14 configured to pass said locking means 12 from the home position to the active locking position, and
• a triggering means 16 configured to assume a rest position in which said triggering means 16 blocks the locking means 12 in its rest position and an active unlocking position in which said triggering means 16 releases said blocking means 12 so that the latter moves from the rest position to the active blocking position.

In the embodiment shown in the figures, the lever 10 is connected to the handle of the opening 2 via the Bowden cable 7. As it is visible on the figure 2 the lever 10 comprises a cam 11 rotatable about an axis of rotation, when traction is exerted on the Bowden cable 7,

The opening lever 10 further comprises a drive means, such as a first protrusion or abutment 11c to allow the locking means 12 to move from the active position to the rest position when the opening lever 10 pivots towards the meaning of the opening of the opening 2.

Thus, in a first variant of the solution represented in figure 2 , the drive means is supported by the cam 11 in the form of at least one protrusion 11c which allows the passage, or even ejection, of the locking means 12 in the rest position. In a second variant illustrated in figure 5 it is the locking means 12 which is itself provided with an elastic tab 12a to ensure this passage. The elastic tab 12a is typically in abutment against a fixed element 12b of the lock of the invention and intended to exert a restoring force on the locking means 12 when the latter is in the active locking position. The elastic tab 12a has the shape of a substantially thin blade having deformation characteristics for exerting on the locking means 12 a restoring force towards the rest position. Said resilient tab 12 exerts a lower or even much lower force to the blocker spring.

In both cases, the cam 11 has bearing surfaces adapted to make contact with the locking means 12 so as to drive the latter in the rest position and to reset the elastic return means 14 via the abutment 11c.

The blocking means 12 is in the standby position when said blocking means 12 is in contact with a face 11, called "waiting protrusion", of the cam. During the rotation of the opening lever, said contact disappears, which allows the locking means 12 to finalize the rotation to the active blocking position. The protrusion 11a makes it possible to push back the locking means 12 towards the rest position when returning to the rest position. The locking means 12 in the locking position bears on the cam 11 which ensures direct control of the covering allowing a second protrusion 11b, called "locking protrusion", here in the form of a hook, to come catching the locking means 12 and thus stop the movement of the opening lever 10.

Thus, the cam 11 comprises a second protuberance 11b, of hook type, formed by a structural abutment defining a recess for receiving a portion 15 of blocking means 12 when the latter is in the active locking position so as to block the movement the opening lever 10.

The cam 11 may comprise more than two protuberances or a single protrusion allowing the return of the locking means from the locking position to the rest position.

The triggering means 16 and the blocking means 12 may be movable each in rotation or in translation. In the context of the examples described, the triggering means 16 is movable in translation, in particular along an axis substantially co-linear with the direction of the axes of the plane formed by the cam 11. The locking means 12 is rotatable along an axis of rotation substantially collinear with the axis of rotation of the cam 11.

Any other combination is possible.

The triggering means 16 is thus configured so as to block any movement of the locking means 12. To do this, the triggering means 16 may comprise a holding protrusion 18 coming into direct abutment substantially in or on a complementary notch 20 present in the means This geometry makes it possible to dispense with the manufacturing sets of the locking means and the triggering means. In the rest position of the triggering means 16 and the locking means 12, the resilient locking spring means 14 exert a permanent torque on the holding protrusion 18 which tends to raise the locking means 12 towards the locking position .

The trigger means can be embodied as a single piece or a multitude of pieces.

According to the embodiment shown, the triggering means 16 is associated with an unlocking spring means of its own, such as a compression spring 24, which allows a translational movement of said trigger means 16. The return means release elastic 24 associated with the triggering means 16 is fixed on a fixed part of the lock 1 of the invention. The assembly formed by the triggering means 16 and the associated spring return means 24 are arranged to move following the resultant inertial force of the side impact suffered by the lock 1 of the invention. In other words, in order to move the triggering means 16 and release the locking means 12, it is necessary that the inertial force in the event of impact suffered by the opening is greater than the stiffness of the elastic return means 24, typically greater than the inertial force resulting from the mass of the triggering means 16 to which is deduced the stiffness of the elastic return means 24.

Said spring release 24 thus allows said trigger means 16 to retain the locking means 12 in the rest position. In the event of impact in the direction 3, said spring release means, such as the spring 24, is then compressed, causing the triggering means 16 and releasing the blocking means 12. trigger means 16 then reaches the active unlocking position. At the end of the shock, the spring 24 drives the triggering means 26 in the rest position.

The blocking means 12 is associated with the resilient locking spring means 14 which may be in the form of one or more springs, in particular in the form of a spiral spring. In the latter case, the spiral spring has an axis of rotation substantially coinciding with that of the blocking means 12. The resilient locking spring means 14 is configured to work by bringing the blocking means 12 from the rest position. towards the active blocking position in the event of release of said blocking means 12 by the triggering means 16.

The lever may comprise a contact surface, in particular an abutment (not shown), able to receive the end of the elastic locking return means and to drive the latter so as to return the elastic return means to the working position.

According to the embodiment of the figure 4 , the resilient locking spring means 14 comprises an end 28 capable of coming under a stop 32 belonging to the blocking means 12.

The blocking means 12 may also have a ramp 34 formed on the abutment 32 so as to allow the end 28 to be placed in position under the abutment 32. The lever may also include a stop 13 which allows the compression and position the end 28 when the locking means has been brought to the rest position.

The locking means 12 moves from the active locking position to the rest position, under the effect of its own weight or assisted by the torque generated by the flexible tab 12a. The stop 11c of the opening lever 10 makes it possible to finalize the return of the locking means 12 in the rest position and the reset via the triggering means, while allowing the spring to be placed under the face 28. Thanks to the part 11d of the 11, the elastic return means 14 is placed under the ramp 34 of the blocking means 12. The return of the blocking means 12 from the blocking position to the rest position is accompanied by the powering up of the return means. resilient elastic 14 through the abutment 13. The locking means 12 may comprise at least one elastic arm 39 configured to change the length of the locking means 12. Said elongation of the locking means 12 allows to release the means of resilient spring return 14 relative to the stop 32. The resilient locking spring means 14 then no longer exerts torque on the blocking means 12. Said elongation of the elastic arm or arms 39 can be achieved when the blocking means 12 passes from the active blocking position to the rest position, in particular when said blocking means undergoes a large pull of the opening lever. 10 greater than a normal pull of door opening by a user.

Each elastic arm 39 has deformation characteristics allowing to resume their original shape after elongation in the locking position of the blocking means 12. Therefore, in order to exit the end 28 of the elastic locking return means, it is necessary to pulling on the opening lever 10 greater than the stiffness corresponding to the sum of that of each elastic arm 39.

Thus, in the active blocking position, when the opening lever 10 pivots towards the opening direction, namely when a user acts on the cable driving said lever to open the opening 2, a pressure is exerted on the means blocking the level or the excrescences of the cam 11 tending the elastic arm or arms 39. The length of the blocking means being greater, the end 28 of the elastic return means is released from the stop 32. The resetting is then performed by means of the stop 13 belonging to the opening lever 10 which puts said end 28 under the stop 32 passing through the ramp 34.

The locking means 12 may be arranged in the lock so that at each rotation of the lever in the direction of opening of the opening, when said locking means 12 is in the rest position, the elastic return means 14 is compressed. The permanent activation of the locking means 12 prevents blocking of the locking means due to the aging of the lock. To do this, the locking means 12 may be disposed away from the opening lever 10 and be brought into contact when the opening lever is pivoted under the action of a normal opening of opening.

The blocking means 12 may be made of a flexible material, such as an acetal resin, to allow deformation and elongation. The trigger will be realized in the material that will achieve the desired mass for the inertial release.

The kinematics following a side impact, for example that along the direction 3, will now be described in more detail.

In the embodiment shown on the figure 6a , the locking means 12 and the triggering means 16 are both in the rest position. In this position, the rod or the cable 7 can rotate the cam 11 and allow the opening of the lock 1 of the invention without hindrance on the part of the locking means 12. As indicated above, according to one embodiment, it is possible to have a contact between the locking means 12 and the cam 11 so as to compress slightly without disturbing the pivoting of the cam to ensure proper operation of the locking means and prevent jamming of the latter, which leaves a possible opening of the lock.

In this position, the retaining projection 18 of the triggering means is locked in the notch 20.

The elastic return means 14 holds the locking means 12 in abutment against said triggering means 16.

In the embodiment shown on the figure 6b , the lock 1 of the invention undergoes a lateral shock in the direction 3. In this embodiment, under the effect of an inertial force applied to the triggering means 16 greater than the stiffness of the elastic return means 24, the trigger element 16 moves and releases the locking means 16 which comes into contact with the cam 11 of the opening lever by pivoting about its axis of rotation under the effect of its resilient return means 14.

The opening lever 10 can also be subjected to acceleration and start a rotation under the influence of a pulling of the Bowden cable 40 and opening the opening 2, but the latter is stopped by the locking means 12 as soon as the latter is in the blocking position. Thus, the portion 15 of the locking means 12 hooks into the abutment 11c through the movement of the cam 11 in the opening direction of the opening.

According to the embodiment shown on the Figure 6c , the locking means 12 is housed in the recess of the protrusion 11b and blocks the opening lever 10. The lever 10 is thus stopped in the rotation that it had begun to be effected by the locking means 12.

If the shock 3 induces oscillations tending to pivot the opening lever 10 in the opening direction of the opening 2, the latter typically have a lower intensity than the resultant stiffness of the elastic arm or arms 39, although that the lever can not be rotated or that the sash can be opened.

However, in the case where the force is greater than the resultant stiffness of the elastic arm (s) 39, the locking means 12 can lengthen under the pull of the opening lever 10, until reaching a stop 100 belonging to the fixed part of the lock of the invention.

Said abutment 100 can be sized to withstand a major effort and applied exceptionally.

According to the embodiment of the figure 6d , as soon as the acceleration becomes zero, the triggering means 16 is maintained in the locking position on the cam 11 by means of spring return 24. This ensures permanent locking regardless of the number of successive shocks to the lock .

In order to disengage the blocking means 12 from its blocking position and return it to the rest position, a pull is imposed on the cable 7 so as to rotate the cam 11 with a force greater than the stiffness of the elastic arms 39 of the locking means. blocking.

As a result, said locking arms 39 take up their working position, stretching by increasing the length of the locking means 12.

The elastic return means 14 blocked by its end 28 under the stop 32 disengages from the latter. Said end thus comes against the stop 13 of the cam 11.

The locking means 12 is thus stretched in opposition to the lever 10 and stopped on the recess of the protrusion 11b.

As shown on the figure 6e , as soon as the lever 10 pivots in the opposite direction to the opening direction of the opening 2, the locking means 12 is no longer in the stretching position because the arms 39 return to their rest position. The locking means 12 is available to return to the rest position and starts to return to the rest position via the waiting protrusion 11a.

As shown on the figure 6f , following traction of the cable 7 causes a rotation of the cam 11 and in particular the second protrusion 11b which drives said locking means 12 in its rest position. This movement can be assisted by the elastic tab 12a.

As shown on the figure 6f thanks to the protrusion 11b, the locking means 12 is placed in the rest position by placing the holding protrusion 18 in the complementary notch 20. The end 28 of the elastic return means is also placed under the stop 32 locking means thereby resetting the elastic return means 14 in compression for the next shock. To do this, the end 28 of said elastic return means is guided by the ramp 34 until it comes to lock under the stop 32.

Advantageously, the lock of the invention comprises a phase in which the triggering element is triggered which releases the locking element under the impulse of an inertial effort, a blocking principle, which prevents the opening by locking of the opening lever, a principle of restoring to the rest position and a moving principle to prevent seizure.

• le blocage de l'ouverture en cas de traction sur le câble de levier d'ouverture lors d'un choc inertiel avec un dispositif de blocage indépendant de l'environnement de la serrure,
• le blocage de la chaine cinématique de la serrure réalisé au sein de la serrure en évitant toute interaction avec des éléments présents dans l'ouvrant,
• le déclenchement sous l'effet inertiel provenant d'un choc ou non,
• le déclenchement s'opérant à partir d'un seuil d'effort inertiel qui est déterminé par la raideur choisi des moyens de retour élastique du moyen déclencheur et la masse du moyen déclencheur,
• le temps de déplacement du moyen de blocage est constant puisqu'il dépend du moyen de retour élastique dont la raideur peut être choisie en fonction du temps de déplacement désiré,
• le positionnement du moyen de blocage et du moyen déclencheur présente une haute tolérance car le blocage se fait par contact sur des zones qui s'autoajustent ce qui permet de limiter la chaîne fonctionnelle.
• la remise en positon de repos s'effectue de manière simple et fiable par un effort supplémentaire réalisable par un utilisateur,
• le volume du support sur lequel sont fixés le moyen de blocage et le moyen déclencheur est réduit ce qui permet également une réduction du coût de fabrication, du poids et l'optimisation du volume actuel d'une serrure.

The lock of the invention has the following advantages:

• the locking of the opening in case of traction on the opening lever cable during an inertial shock with a locking device independent of the environment of the lock,
• locking the kinematic chain of the lock made within the lock by avoiding any interaction with elements present in the opening,
• triggering under the inertial effect from shock or not,
• the tripping being effected starting from an inertial force threshold which is determined by the stiffness chosen by the elastic return means of the triggering means and the mass of the triggering means,
• the displacement time of the locking means is constant since it depends on the elastic return means whose stiffness can be chosen as a function of the desired travel time,
• the positioning of the locking means and the trigger means has a high tolerance because the blocking is done by contact on self-adjusting areas which limits the functional chain.
• restoring the rest position is performed simply and reliably by additional effort achievable by a user,
• the volume of the support on which are fixed the locking means and the triggering means is reduced which also allows a reduction in manufacturing cost, weight and optimization of the current volume of a lock.

Claims (13)

1. A latch (1) for a door leaf (2) of a motor vehicle including:

   - an opening lever (10) of said door leaf (2) intended to allow the opening of the door leaf (2),

   - a blocking means (12) configured to take an active blocking position wherein said blocking means (12) blocks said opening lever (10) and a rest position wherein said blocking means (12) allows the movement of said opening lever (10),

   - an elastic return blocking means (14) configured to switch said blocking means (12) from the rest position to the active blocking position, and

   - a trigger means (16) configured to take a rest position wherein said trigger means (16) blocks the blocking means (12) in its rest position and an active unblocking position wherein said trigger means (16) releases said blocking means (12) so that the latter switches from the rest position to the active blocking position, the trigger means (16) being arranged to move under the effect of an inertial force applied to the latch during an accident,

   the opening lever (10) including a drive means (11c) configured to bring the blocking means (12) from the active blocking position to the rest position when the opening lever (10) pivots towards the direction of opening of the door leaf (2).
2. The latch (1) according to the preceding claim, wherein the cam (11) supports the drive means in the form of a protuberance (11c).
3. The latch (1) according to claim 1 or 2, wherein the cam (11) includes a hook-type protuberance (11b) formed by a structural abutment defining a recess intended to receive a portion (15) of the blocking means (12) when the latter is in the active blocking position so as to block the movement of the opening lever (10).
4. The latch (1) according to any one of the preceding claims, wherein the blocking means (12) includes at least an elastic arm configured to modify the length of the blocking means in order to disengage the elastic return blocking means (14) of the blocking means (12).
5. The latch (1) according to any one of the preceding claims, wherein the elastic return blocking means (14) includes a first end (28) capable of coming into an abutment (32) belonging to the blocking means (12) and a second end capable of being fastened on a fixed element of the latch.
6. The latch (1) according to the preceding claim, wherein the blocking means (12) includes a ramp (34) allowing the elastic return blocking means (14) to return into the abutment (32) when said blocking means (12) switches from the active blocking position to the rest position.
7. The latch (1) according to the preceding claim, wherein the protuberance is configured to receive the end (28) of the elastic return blocking means (14) and to drive the latter into the abutment (32) of the blocking means (12) when the blocking means (12) has been brought into the rest position.
8. The latch (1) according to any one of the preceding claims, wherein the blocking means includes an elastic tab (12a) in abutment against a fixed element (12b) of the latch (1) and intended to exert a restoring force on the blocking means (12) when the latter is in the active blocking position.
9. The latch (1) according to any one of the preceding claims, wherein the trigger means (16) is associated with an elastic return unblocking means (24) configured to allow the switching of the trigger means (16) from the active unblocking position to the rest position.
10. The latch (1) according to the preceding claim, wherein the trigger means (16) is movable in translation through the elastic return means such as a compression spring (24), fastened to the trigger means (16) and to a fixed element of the latch.
11. The latch (1) according to any one of the preceding claims, wherein the trigger means (16) includes a protuberance (18) coming substantially into or onto a complementary notch (20) present in the blocking means (12).
12. The latch (1) according to any one of the preceding claims, wherein the blocking means (12) is disposed in the latch (1) in the rest position so that, at each rotation of the opening lever (10) in the direction of the opening of the door leaf (2) and when the blocking means (12) is in the rest position, the blocking means (12) and the opening lever (10) come into contact.
13. A motor vehicle including a door leaf (2) and a latch (1) intended to open and close said door leaf (2) according to any one of the preceding claims.

Images