EP1069264B1 - Motorized safety lock - Google Patents

Description

The present invention relates to a motorized safety lock intended to be placed on the door of a high security enclosure, such as a safe or vault door, for example bank branches.

This motorized safety lock can ensure a direct or indirect closing of the door. In the first case, it is mounted so that its deadbolt enters a keeper provided for this purpose in the amount of the door. In the second case, it is installed on a safe door as shown schematically in Figure 1 attached.

As shown in this figure, the closure of a PO door of a safe or other security enclosure (this door being seen from the inside in Figure 1) is usually done with several bolts PT controlled by a TR linkage. This linkage TR comprises a bar B which controls the movement of the bolts PT of the door PO and which is coupled to a steering wheel VO via a mechanism of the rack-and-pinion type.

This bar B can be moved in tranlation, under the action of the VO wheel, to cause the movement of the PT bolts and to ensure the locking operations (bolts out) and unlocking (bolts returned) of the door.

To prevent opening of the door PO and keep the linkage TR in the locking position, this set comprises a first lock S, itself provided with a bolt PS designed to engage in the bar B and block the movement in translation thereof.

However, in order to further increase the level of security and to prevent fraudulent use of this first lock S, it can be associated with a second SSM lock of the motorized safety lock type guaranteeing a so-called "indirect" closure of the door.

This SSM lock also has its own PV bolt, intended to be placed on the path of the bar B to hinder movement to its unlocking position. In the high position of the PV bolt shown in Figure 1, the bar B abuts by its rear end against the PV bolt.

The displacement of the PV bolt is provided by a motor M, controlled by electronic means EL. Thanks to these electronic means, it is possible to program time slots during which the PV latch prohibit the sliding of the bar B, even if the opening of the first lock S is ordered by a valid signal, ie a key or an opening code recognized as such. This doubles the security by prohibiting authorized personnel from opening the door.

It is already known from US 5 473 922 of the prior art, such an electronic security lock, motorized, self-locking, for a secure door. This lock has
a housing,
a reversible electric motor (with two directions of rotation),
a mobile bolt in translation, and
connection means for transmitting to the bolt the driving force from the electric motor and to move said bolt from an unlocking position to a locking position and vice versa.

The translational movement of the bolt between these two extreme positions is ensured by the rotation of the motor alternately clockwise and counterclockwise.

This device of the prior art therefore has the disadvantage of using an electric motor with two directions of rotation to translate the bolt in translation in both directions. This type of engine is of a more complicated structure than a motor with a single direction of rotation, includes more components and its electronic management is more complex. This motor is therefore subject more frequently to breakdowns or malfunctions.

If a malfunction of the motor M or the electronic means EL occurs when the door PO is in the locked position (PT bolts out), the opening of said door is then completely impossible, since the dead bolt of the lock SSM physically blocks the movement of the bar B of the linkage.

Now, this SSM lock is designed and positioned on the PO door to be tamperproof, that is to say inaccessible and indestructible, which prevents access and repair, even by security teams.

Accordingly, to gain access to the inside of the protected enclosure, it is necessary to destroy the enclosure by making a breach in the wall thereof or to destroy the door. In any case, it is necessary to damage the security enclosure, which is extremely expensive, both because of the cost of repairing damaged materials and devices as the cost of intervention of specialized technical teams.

In addition, these operations of opening and repairing the enclosure and the door may require several hours, or even days, to be performed. During this time, access to the interior of the enclosure is prohibited, which can be detrimental.

Furthermore, in the safety lock disclosed in US 5,473,922, the axis of the motor is parallel to the longitudinal axis of the bolt which results in significant space in particular in the longitudinal direction.

In EP 0 887 496, there is described a device for canceling the prohibition of opening a lock with conditional opening. This device comprises in particular a bolt, an electric motor with two directions of rotation for moving the bolt in a "retracted" position and in an "output" position, means for connecting the motor to the bolt, which comprise means for storing the latch. programmed position of the bolt. The connection means can be disconnected from the bolt independently of the storage means of the programmed position of the bolt by the control means.

However, it would be desirable to be able to leave enough space in the housing to receive additional detectors, without it being necessary to increase the external dimensions of the housing. Indeed, they are standardized, so that the lock can be introduced into a standard housing provided on the door, without subsequent adjustments thereof.

It is however known to use a motor with a single direction of rotation to move the bolt of a security lock. For example, DE 197 14 612 describes a motorized safety lock. This lock comprises in a housing a bolt capable of moving in translation between a "retracted" position and an "output" position, and control means which consist of at least one electric motor with a single direction of rotation, means for activating the motor, and means for connecting the motor to the bolt. A tension spring is connected between the housing and the bolt to pull the bolt into an "out" position.

The object of the invention is therefore to overcome the drawbacks of the prior art by providing a more reliable and less bulky device.

• un boîtier,
• un pêne susceptible de se déplacer en translation entre une position "rétractée" et une position "sortie", lesdites positions étant programmées par des moyens de commande de déplacement du pêne, ce pêne comprenant une face d'extrémité avant, une face d'extrémité arrière, deux faces latérales, une première et une deuxième faces longitudinales,
• les moyens de commande du déplacement du pêne comprenant un moteur à un seul sens de rotation, des moyens d'activation de ce moteur et des moyens de connexion du moteur au pêne, pour transmettre la force d'entraînement du moteur audit pêne et assurer le déplacement de celui-ci,

caractérisée en ce qu'elle comprend
des moyens de mémorisation des positions "retractée et "sortie" du pêne, et
en ce que les moyens de mémorisation des positions programmées du pêne comprennent un ressort pincette comportant un enroulement hélicoïdal et deux bras radiaux, ce ressort pincette étant monté sur la première face longitudinale du pêne pour coopérer avec lesdits moyens de connexion du moteur au pêne, et se déplaçant en translation avec le pêne entre la position "rétractée" et la position "sortie", et en ce que les moyens de connexion du moteur au pêne peuvent armer ce ressort pincette en cas de blocage du pêne dans une position "retractée" or "sortie" différente de celle programmée par les moyens de commande de déplacement du pêne, de façon que ce ressort pincette puisse ramener le pêne dans la position programmée dès que le blocage cesse.This goal is achieved with the aid of a motorized security lock comprising:

• a housing,
• a bolt capable of moving in translation between a "retracted" position and an "output" position, said positions being programmed by bolt movement control means, this bolt comprising a front end face, an end face rear, two lateral faces, a first and a second longitudinal faces,
• the means for controlling the movement of the bolt comprising a motor with a single direction of rotation, means for activating this motor and means for connecting the motor to the bolt, for transmitting the driving force of the motor to said bolt and ensuring the moving of it,

characterized in that it comprises
means for memorizing the positions "retracted and" output "of the bolt, and
in that the means for memorizing the programmed positions of the bolt comprise a pincer spring comprising a helical winding and two radial arms, this pincer spring being mounted on the first longitudinal face of the bolt to cooperate with the said means for connecting the motor to the bolt, and moving in translation with the bolt between the "retracted" position and the "output" position, and in that the means for connecting the motor to the bolt can arm this pincer spring in the event of locking the bolt in a "retracted" position gold "output" different from that programmed by the bolt movement control means, so that the tweezers spring can bring the bolt to the programmed position as soon as the blocking stops.

Thanks to these characteristics, the motor used only rotates in one direction and therefore has a lower risk of breakdowns.

• une came circulaire entraînée en rotation par le moteur, et
• un levier d'entraînement relié à l'une des ses extrémités à ladite came, par un premier moyen de fixation et à son autre extrémité, au pêne, par un second moyen de fixation.

Preferably, the means for connecting the motor to the bolt comprise

• a circular cam driven in rotation by the motor, and
• a drive lever connected at one of its ends to said cam, by a first fastening means and at its other end to the bolt, by a second fastening means.

In the document US Pat. No. 5,473,922, when the motor acts to bring the bolt into the "retracted" position, it compresses a coil spring and the force that the motor must exert to move the bolt increases, as the compression of the bolt increases. this coil spring. As a result, the motor is more demanding on the power source that powers it. However, this energy source is often an autonomous battery or a battery that does not support sudden changes in energy demand, especially when the battery begins to discharge. The lock according to the invention eliminates the use of this coil spring and the disadvantages related thereto. The device according to the invention is therefore more reliable.

In addition, when a tweezer spring is used to return the bolt to the programmed position as soon as the locking action exerted on the bolt stops, the force exerted by the arms of the tweezer spring on the bolt is constant and this, whatever the arm spacing.

Finally, according to an advantageous embodiment of the invention, the axis of the motor shaft is perpendicular to the longitudinal axis of the bolt and parallel to the plane of the longitudinal surfaces of the bolt.

This position of the motor frees up space inside the housing to introduce different sensors, such as temperature or pressure sensors or seismic sensors, for example. These sensors can be used to send information to the engine activation means to close the lock in case of burglary by torch attack or using a tool exerting vibrations.

• la figure 1 est une vue schématique d'ensemble d'une porte d'une enceinte de sécurité, munie de la serrure de sécurité motorisée ,
• la figure 2 est une vue de derrière du boîtier de la serrure selon un mode de réalisation de l'invention dans une première position caractéristique de fonctionnement, le couvercle qui recouvre normalement ce boîtier ayant été enlevé à des fins de simplification,
• la figure 3 est une vue en coupe de la serrure prise le long de la ligne III-III de la figure 2,
• la figure 4 est une vue en coupe de la serrure prise le long de la ligne VI-VI de la figure 2,
• la figure 5 est une vue en perspective du ressort pincette destiné à être monté dans la serrure selonun mode de réalisation de l'invention.
• les figures 6 à 8 sont des vues de derrière de la serrure selon un mode de réalisation de l'invention, similaires à la figure 2, mais représentant la serrure dans d'autres positions caractéristiques de fonctionnement, et
• les figures 9 et 10 sont des vues de derrière similaires à la figure 2, représentant la serrure selon un mode de réalisation de l'invention dans des positions où le pêne est bloqué respectivement en position "sortie" et en position "rétractée".

The invention will be better understood on reading the following description of an embodiment of the invention given by way of illustrative and non-limiting example, this description being made with reference to the accompanying drawings in which:

• FIG. 1 is a diagrammatic overall view of a door of a security enclosure, provided with the motorized safety lock,
• FIG. 2 is a rear view of the lock housing according to one embodiment of the invention in a first characteristic operating position, the cover which normally covers this housing having been removed for simplification purposes,
• FIG. 3 is a sectional view of the lock taken along the line III - III of FIG. 2,
• FIG. 4 is a sectional view of the lock taken along the line VI-VI of FIG. 2,
• Figure 5 is a perspective view of the spring clip to be mounted in the lock according to an embodiment of the invention.
• Figures 6 to 8 are rear views of the lock according to one embodiment of the invention, similar to Figure 2, but showing the lock in other operating positions, and
• Figures 9 and 10 are rear views similar to Figure 2, showing the lock according to one embodiment of the invention in positions where the bolt is locked respectively in the "output" position and in the "retracted" position.

An embodiment of the invention will be described below, firstly referring to FIG. 2. The security lock according to the invention comprises a parallelepipedal casing 1 intended to receive a bolt 3 and displacement control means. of the bolt, generally referenced 5. This housing 1 is defined by a bottom 7, two longitudinal flanges 9 and two end flanges 11. It has a median longitudinal axis XX and is normally closed by a cover screwed on said housing, but no shown in the figures. This housing also has, in one of its end flanges 11, an opening 13 for the passage of the bolt. This opening 13 is delimited by the cover, the bottom of the housing and by two parallel guide walls 15, parallel. The bolt 3 is mounted in this opening 13 with side operating clearances, allowing it to slide without friction, between a so-called "retracted" position (illustrated in FIG. 2) and a so-called "exit" position (illustrated in FIG. 6). wherein the lock according to the invention acts to effect a direct or indirect closure as defined above.

In addition, the housing 1 also comprises a bolt guide (not shown) provided in the bottom 7 of the housing to ensure a rectilinear translation of the bolt.

Finally, the housing 1 comprises a locking pin 17 consisting of a substantially cylindrical element disposed perpendicular to the median longitudinal axis XX of the housing and extending from one of the longitudinal edges 9 of the housing, towards the inside of the housing. this one. As illustrated in FIG. 2, this locking finger protrudes above the bolt 3, through a cylindrical opening 19 opening into one of the lateral guide walls 15. The role of this locking finger 17 will be explained later.

The means for controlling the movement of the bolt 5 comprise a motor 21, means for activating this motor (not shown) and means for connecting the motor 21 to the bolt 3.

The motor 21 is a motor with a single direction of rotation powered by a battery or a self-contained battery. It comprises a gear reducer and its motor shaft is provided with a conical gear pinion 23. As illustrated in the figures and contrary to the prior art, the motor 21 is disposed in the casing 1 so that its longitudinal axis YY (or axis of its motor shaft) is perpendicular to the longitudinal axis of the bolt 3 and parallel to the plane of the longitudinal surfaces of the bolt.

The engine activation means comprise electronic means associated with display and data input devices that allow the user to open or close the lock either immediately, or according to predetermined time slots or according to 1 other parameters. The electronic means can also be connected to sensors giving information on a possible attempt burglary on the lock. These means are known to those skilled in the art and will not be described further.

Finally, the connection means of the motor to the bolt comprise a circular cam 25 and a drive lever 27.

The circular cam 25 is mounted free to rotate on an axis 29 driven into the bottom of the housing 1 and perpendicular to the motor shaft. The cam 25 is rotated by the motor 21 through a second bevel gear wheel 31 provided on its underside and engaged with the teeth of the gear pinion 23 of the drive shaft. This device is a corner reference and appears better in Figure 4.

The drive lever 27 is fixed at one of its ends to the cam 25, by a first attachment means 33 and at its other end, on the bolt 3, by a second attachment means described later. It plays the role of a connecting rod and ensures the translational movement of the bolt 3.

More specifically, the first fastening means 33 is constituted by a tenon head which supports and rotates the end of the drive lever 27. The latter can rotate freely around the tenon head.

Finally, the cam 25 is provided with a magnet 35, fixed on said pin 33. This magnet 35 cooperates with a position sensor provided in the housing cover (not shown in the figures) and capable of providing the means of activation of the motor, signals representative of the angular position of the cam 25.

The bolt 3 consists of a block of generally parallelepipedal shape. It is a bolt without bevel or deadbolt. This bolt has a front end face 37, a rear end face 39, two opposite side faces 41, narrower and a first longitudinal face 43 and a second 45 faces also opposite opposite, wider. The front end face 37 is defined as that located at the end of the bolt coming out of the casing 1. The first longitudinal face 43 is also defined as being seen from the front in FIG. 2. The face 45 and visible only in FIG. figure 3.

In addition, the front part of the bolt (that is to say the one that at least partially leaves the housing) is narrower than the rear part. As a result, the two lateral faces 41 have a recess 46 forming a shoulder. When the bolt 3 is in the "out" position (illustrated in FIG. 6), these two shoulders 46 abut against the inner ends of the lateral guide walls 15.

On one of the side faces 41 is provided a U-shaped groove 47, located in the extension of the shoulder 46 and intended to cooperate with an anti-tamper device 49 whose structure and operation will be described later. This burglar-proof device is fixed on the longitudinal flange 9 of the housing 1 opposite said U-shaped groove 47.

Furthermore, the second longitudinal face 45 of the bolt is provided with a groove intended to cooperate with the bolt guide located at the bottom of the housing 1 and mentioned above.

In addition, the first longitudinal face 43 of the bolt is provided with a groove 51 extending in a direction parallel to the longitudinal axis of said bolt and the longitudinal axis XX of the housing, over at least a part of the length of the bolt and substantially on the back half of it. The width of this groove is such that it can receive a pin 53 fixed to the end of the drive lever 27 and slidable in said groove between two extreme positions illustrated respectively in Figures 9 and 10.

Finally, the first longitudinal face 43 of the bolt preferably has on its front part, a magnet 55, and on its enlarged rear part, an axis 57, an axis 59 and a stop 61, these last three elements being aligned along a line ZZ perpendicular to the axis of the groove 51. This line ZZ appears in Figure 7. The stop 61 and the axis 57 are integral with the bolt 3, as shown in Figure 3. The magnet 55 cooperates with a sensor. position provided in the housing cover and not shown in the figures. This position sensor can provide the motor activation means with signals representative of the position of the bolt 3 in the housing 1.

The axis 57 and the stop 61 make it possible to position a pincer spring 63 constituting the means for memorizing the "retracted" and "output" positions of the bolt 3.

This spring clamp 63 is illustrated in the unstressed state in Figure 5. It has a body formed of a helical winding 65 with several turns and two radial arms, formed of a single elastic wire. According to the disposition of the spring in FIG. 5, these two arms are designated respectively by left arm 67 and by right arm 69. The left arm 67 is connected to the first turn 71 of the spring and the right arm 69 to the last turn 73 of the winding by a thread return 75 extending along said body 65. When this tweezers spring 63 is positioned on the bolt 3, the winding helical 65 freely surrounds the axis 57 and the last turn 73 is against the first longitudinal face 43 of the bolt.

When the spring is in the free (unconstrained) state, illustrated in FIG. 5, the two arms 67 and 69 tend to deviate from each other. On the contrary, when the tweezers spring 63 is mounted on the bolt, these two arms are bandaged in the direction of the arrows F of Figure 5 to come to cross as shown in Figure 2. These two arms 67 and 69 are kept under tension in this position by the stop 61 that they imprison. Indeed, under the action of the force of stress absorbed by the spring pincette, the two arms 67 and 69 tend to deviate from each other (to return to the position shown in Figure 5) and to this fact strongly support on both sides of the stop 61.

The pincer spring 63 is positioned on the bolt 3 so that its two radial arms extend parallel to the plane of the first longitudinal face 43 of the bolt, perpendicular to the groove 51 and above it. Moreover, the pin 53 of the driving lever is positioned simultaneously in the groove 51 and between the two radial arms 67 and 69 of the tweezer spring. In other words, the two arms 67 and 69 of the spring and the groove 51 define a receiving housing of the pin 53.

The yarn constituting the tweezer spring 63 can absorb bending stresses, which allows the two arms 67, 69 to deviate under certain extreme stresses (see FIGS. 9 and 10) by further binding the spring and then returning to their position. configuration illustrated in Figure 2.

As illustrated in Figure 2, and optionally the bolt 3 is also provided with a locking lever 77 of the bolt in the "output" position. This L-shaped lever has two arms. One of the arms 79 is provided at its free end with a hook 81 intended to cooperate with said locking pin 17 described above. The other arm 83 is provided at its free end with an activation pin 85 integrally, perpendicular to the plane of said lever 77. This lever can pivot about the axis 59 and is spring loaded by a spring 87 As illustrated in FIG. 3, the spring 87 is placed between the first longitudinal face 43 of the bolt and the lever 77.

The locking lever 77 is disposed on the bolt 3 and under the tweezers spring 63 so that the lug 85 projects between the two arms 67, 69 of the tweezers spring. The spring 87 tends to tilt the lever 77 in the direction of the arrow F1 (Figure 7), so that the hook 81 locks on the locking finger 17 and opposes the retraction of the bolt.

Finally, the lock optionally includes an anti-tamper device 49 consisting of a Z-shaped blade 89, one end 91 of which is armed with a spring 93. This device occupies the position illustrated in FIG. 2 when the lid (no shown) is screwed on the housing 1, with a tab provided on this housing and which blocks the blade 89. In case of break-in, if a criminal removes the cover, it no longer holds the end 91 of the blade 89 and the latter rotates until its other end 95 engages in the U-shaped groove 47 thus blocking the bolt 3 in the "output" position. This device is conventional and will not be described further.

The operation of the security lock and the movement of its various constituent elements will now be described with reference in particular to FIGS. 2 and 6 to 8.

In the starting position illustrated in FIG. 2, the bolt 3 is in the "retracted" position. The user of the lock inputs data via a keyboard of the engine activation means, which has the effect of causing the rotation of the motor 21 and via the bevel gear 23,31, the rotation of the cam 5 counter-clockwise (arrow F2). This rotation of the cam 5 causes the displacement of the stud 33 and thus the drive lever 27 to the position shown in Figure 6. The pin 53 located at the end of the drive lever 27 is secured to the bolt 3 since it is maintained on the one hand by the groove 51 and on the other by the two arms of the tweezers spring 63 itself secured to the bolt 3. The displacement of the lever arm 27 thus causes the bolt to move in position "outlet" illustrated in Figure 6 until the two shoulders 46 of the bolt abut against the inner ends of the side walls. 15 for guiding the bolt. In this position, the bolt 3 can not get out of the housing 1 any further.

When the cam 25 continues its rotation to the position of Figure 7, the drive lever 27 reaches its maximum position on the left in Figure 7 and the pin 53 is then slightly eccentric with respect to the line ZZ connecting the center of the stop 61 in the center of the axis 57. In other words, the straight line connecting the center of the pin 53 and the axis 57 makes a small angle α with the line ZZ. In this extreme position, the pin 53 presses on the arm 69 so as to move the arm slightly apart. The lug 85 of the locking lever 77 is no longer maintained, the spring 87 recalls the locking lever 77 by rotating it in the counterclockwise direction (arrow F1). The hook 81 then engages on the locking finger 17. The bolt 3 is locked in the "output" position.

When the user wishes to open the lock, he actuates the motor 21 so that the cam 25 continues to rotate in the direction F2, to occupy the position shown in Figure 8. In this position, the drive lever 27 is brought back very slightly to the right until the pin 53 is again aligned with the stop 61 and the shaft 57. The arm 69 then exerts pressure on the lug 85 against the force of the spring 87 and returns the lock lever 77 to the unlocked position. Following the rotation of the cam 25 returns all the elements in the initial position of Figure 2 where the lock is open.

It can thus be seen that also in the prior art, the rotation of the motor 21 in one direction only makes it possible to close and open the lock.

FIG. 9 illustrates a particular case where the "retracted" position of the bolt is desired by the user and thus programmed via the control means 5 of the movement of the bolt, but where the bolt 3 remains locked in the "output" position by the bar B of the linkage shown in Figure 1.

In this case, the control means 5 of the displacement of the bolt have caused the rotation of the cam 25 and the displacement of the drive lever 27 in the position illustrated in FIG. 2. However, since the bolt 3 is locked in the "output" position ", the pin 53 of the drive lever 27 slides at the rear end of the groove 51 and thus the tweezers spring 63 opens by elastic spacing of its two arms. It can therefore be considered that the movement of the bolt 3 to its "retracted" position is memorized by the tweezers. When the locking of the bolt 3 ceases because the bar B is moved, the bolt 3 ends its stroke towards the "retracted" position (FIG. 2) thanks to the restoring force exerted by the tweezer spring 63.

FIG. 10 illustrates the particular case in which the "output" position of the bolt 3 is programmed but where the bolt is held in the "retracted" position by an external action. Similarly, the displacement of the cam 25 and the drive lever 27 causes the arms of the tweezer spring 63 to move apart and when the locking of the bolt 3 stops, the tweezer spring 63 exerts a restoring force which returns the bolt "output" position.

Claims (10)

1. Motorised security locking system including:

   - a case (1),

   - a sliding bolt (3) able to move in translation between an " in " position and an " out " position, said positions being programmed by sliding bolt (3) movement control means (5), this sliding bolt (3) including a front end face (37), a back end face (39), two lateral faces (41), a first (43) and second (45) longitudinal faces,

   - the means (5) for controlling the movement of the sliding bolt (3) including a motor (21) with a single rotational direction, means for actuating said motor (21), and means (25, 27) for connecting the motor (21) to the sliding bolt (3), to transmit the drive force from the motor (21) to said sliding bolt (3) and to assure the movement thereof, characterised in that it comprises means for storing the " in " and " out " positions of the sliding bolt (3), arid in that the sliding bolt (3) programmed position storage means include a spring clip (63) including a helical winding (65) and two radial arms (67, 69), said spring clip (63) being mounted on the first longitudinal face (43) of the sliding bolt (3) to cooperate with said means (25, 27) for connecting the motor (21) to the sliding bolt (3), and moving in translation with the sliding bolt (3) between the " in " position and the " out " position, and in that the means (25, 27) for connecting the motor (21) to the sliding bolt (3) can wind said spring clip (63) in the event that the sliding bolt (3) is blocked in an " in " or " out " position different to that programmed by the sliding bolt (3) movement control means (5), so that the spring clip (63) can return the sliding bolt (3) to the programmed position as soon as the blockage ends.
2. Motorised security locking system according to claim 1, characterised in that the means for connecting the motor (21) to the sliding bolt (3) include:

   - a circular cam (25) driven in rotation by the motor (21), and

   - a drive lever (27) connected at one of its ends, by first fixing means (33), to said cam (25) and at the other end, by second fixing means (51, 53, 63), to the sliding bolt (3).
3. Motorised security locking system according to claim 2, characterised in that the sliding bolt (3) has on its first longitudinal face (43), a groove (51) extending along a direction parallel to the axis of translation of said sliding bolt (3), over at least a portion of its length, in that the second means for securing the drive lever (27) to the sliding bolt (3) are formed by a pin (53) able to slide into said groove (51) of the sliding bolt (3), and in that the spring clip (63) is positioned on the sliding bolt (3) so that its two radial arms (67, 69) extend, parallel to the plane of the first longitudinal face (43) of the sliding bolt (3), perpendicular to said groove (51) and above the latter, so that the pin (53) of the drive lever (27) is positioned simultaneously in the groove (51) and between the two radial arms (67, 69) so as to be able to act thereon.
4. Motorised security locking system according to claim 1, characterised in that the axis (Y-Y) of the motor (21) shaft is perpendicular to the longitudinal axis of the sliding bolt (3) and parallel to the plane of the longitudinal surfaces (43, 45) of the sliding bolt (3).
5. Motorised security locking system according to claim 1, characterised in that the motor (21) actuation means include electronic means associated with peripheral display and data entry units.
6. Motorised security locking system according to claims 2 and 4, characterised in that the connection between the motor (21) shaft and the cam (25) is achieved via a bevel gear, formed by a first conical gear wheel (23) arranged at the free end of the motor shaft and a second conical gear wheel (31) provided on the opposite face of the cam (25) to that on which the end of the transmission lever (27) is fixed.
7. Motorised security locking system according to claim 1, characterised in that it includes means (17, 77) for locking the sliding bolt (3) in the " out " position.
8. Motorised security locking system according to claim 7, characterised in that the locking means include a locking lever (77) mounted so as to pivot on the sliding bolt (3) and able to co-operate with a locking finger (17) secured to the case (1) when the sliding bolt is in the " out " position.
9. Motorised security locking system according to claim 8, characterised in that the locking lever (77) is an L-shaped lever wound by a spring (87), having two arms located on either side of a pivoting pin (59), the first arm (79) having a hook (81) intended to co-operate with the locking finger (17) and the second arm (83) including an actuation snug (85) and in that said locking lever (77) is arranged on the first longitudinal face of the sliding bolt (43) so that said actuation snug (85) is located between the two arms (67, 69) of the spring clip (63) so that the latter can act on it in order to control the movement of said locking lever (77).
10. Motorised security locking system according to any of the preceding claims, characterised in that it includes an anti-break-in device (49) designed to block the sliding bolt (3) in the " out " position, if the cover of the case (1) is removed.

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