FR3133638A1 - Locking and unlocking control device - Google Patents

Abstract

Title: Locking and unlocking control device The invention relates to a locking and unlocking control device for a leaf, comprising: a base, a lever pivotally mounted around an axis of rotation between a first position and a second position, a movable element cooperating with the lever so that when the lever is moved from the first position to the second position, the movable element moves from a retracted position to an engaged position under the action of the lever, and in which the movable element cooperates with a locking mechanism so that when the movable element is moved from the retracted position to the engaged position the mechanism passes from a locked position to an unlocked position, characterized in that the base includes a housing into which the lever is retracted into the first position, the lever protruding from the base. Figure for abstract: Fig. 1 C

Description

Locking and unlocking control device

The present invention relates to the field of equipment for openings, in particular of the window or French window type, usable in the building sector. It relates to a device for controlling a locking and unlocking system which can be fitted to an upright of a leaf.

One application concerns sliding bays or windows, comprising at least one leaf mounted in horizontal translation relative to a frame.

STATE OF THE ART

There are several types of handles intended for locking and unlocking a lock.

In the vast majority of cases, the handle is an object that can be rotated around an axis perpendicular to a plane of the leaf. To lock and unlock the leaf, the user turns the handle from one position to another, these two positions protruding from the leaf. The handle generally drives a drive device embedded in the leaf which itself controls an element, such as a hook or a bolt, used to attach the leaf to the window frame.

An objective of the present invention is to propose an alternative to current devices.

Another objective of the invention is to provide a discreet and space-saving device.

Furthermore, the invention proposes a solution allowing the crossing of leaves mounted sliding on the same window without damaging the locking and unlocking control device.

The other objects, characteristics and advantages of the present invention will appear on examination of the following description and the accompanying drawings. It is understood that other benefits may be incorporated.

SUMMARY

1. une base apte à être montée sur un vantail, la base présentant une dimension transversale s’étendant dans un plan dit plan de la base,
2. un levier monté sur la base de manière pivotante autour d’un axe de rotation entre une première position et une deuxième position,
3. un élément mobile coopérant avec le levier de sorte à ce que lorsque le levier est déplacé de la première position à la deuxième position, l’élément mobile se déplace d’une position reculée à une position engagée sous l’action du levier,

et dans lequel l’élément mobile est apte à coopérer avec un mécanisme de verrouillage et de déverrouillage apte à être monté sur le vantail, de sorte à ce que lorsque l’élément mobile est déplacé de la position reculée à la position engagée, et inversement, le mécanisme de verrouillage et de déverrouillage passe d’une première position verrouillée à une première position déverrouillée, et inversement, sous l’action de l’élément mobile,
caractérisé en ce que la base comprend un logement dans lequel est rétracté le levier lorsque ledit levier se trouve dans la première position, le levier faisant saillie par rapport à la base lorsque ledit levier se trouve dans la deuxième position.To achieve this objective, according to one embodiment, a locking and unlocking control device for a leaf is provided, comprising:

1. a base capable of being mounted on a leaf, the base having a transverse dimension extending in a plane called the plane of the base,
2. a lever mounted on the base in a pivoting manner around an axis of rotation between a first position and a second position,
3. a movable element cooperating with the lever so that when the lever is moved from the first position to the second position, the movable element moves from a retracted position to an engaged position under the action of the lever,

and in which the movable element is capable of cooperating with a locking and unlocking mechanism capable of being mounted on the leaf, so that when the movable element is moved from the retracted position to the engaged position, and vice versa , the locking and unlocking mechanism passes from a first locked position to a first unlocked position, and vice versa, under the action of the movable element,
characterized in that the base comprises a housing into which the lever is retracted when said lever is in the first position, the lever projecting relative to the base when said lever is in the second position.

The device according to the invention differs from common devices in that the lever can be retracted into a housing.

The fact that the lever is retracted into the housing when it is in the first position also gives the device greater discretion than current devices.

A second object of the invention relates to a locking and unlocking system comprising a locking and unlocking control device according to the invention.

A third object of the invention concerns a leaf on which a locking and unlocking system according to the invention is mounted.

BRIEF DESCRIPTION OF THE FIGURES

The aims, objects, as well as the characteristics and advantages of the invention will emerge better from the detailed description of an embodiment of the latter which is illustrated by the following accompanying drawings in which:

Figures 1A to 1E represent a locking and unlocking control device according to an embodiment of the present invention in which the locking is automatic. Figures 1A to 1D are sectional views while the constitutes an exploded view of this embodiment.

Figures 2A to 2E represent a locking and unlocking control device according to one embodiment of the present invention in which locking is done manually. Figures 2A to 2D are sectional views while the constitutes an exploded view of this embodiment.

There represents a locking mechanism that can be associated with the control device.

There represents a detail of the locking mechanism.

There represents a window equipped with a locking system according to one embodiment of the present invention.

The drawings are given as examples and are not limiting to the invention. They constitute schematic representations of principle intended to facilitate the understanding of the invention and are not necessarily on the scale of practical applications. In particular, the proportions are not always representative of reality.

DETAILED DESCRIPTION

Before beginning a detailed review of embodiments of the invention, the following are set out as optional characteristics which may possibly be used in combination or alternatively:

According to one embodiment, the lever has a first contact surface and the movable element has a first support surface, the first contact surface and the first support surface being able to cooperate so that when the lever is moved from the first position to the second position, the lever moves the movable element from the retracted position to the engaged position by pushing the first contact surface onto the first bearing surface.

According to one embodiment, the axis of rotation is parallel to the plane of the base. Preferably, in a situation mounted on the leaf, this axis extends horizontally. Advantageously, it is directed along a width dimension of the housing of the base receiving the lever and it is located in the interior volume of this housing.

According to one embodiment, the lever has an upper part and a lower part, the upper part and the lower part being located on either side of the axis of rotation.

According to one embodiment, the lever can be moved, without moving the movable element, from the first position to an intermediate position in which at least part of the lever projects relative to the base.

According to one embodiment, when the lever is in the intermediate position, a longitudinal dimension of the lever forms an angle of between 15° and 30° with the plane of the base.

According to one embodiment, the upper part has a recess having a curved shape, preferably concave.

Preferably, the upper part has a longitudinal dimension strictly less than the longitudinal dimension of the lower part. Preferably, it is at least half as long, or even at least four times as long.

According to one embodiment, the recess has a length along the longitudinal dimension of between 2 and 4 cm.

According to one embodiment, the lower part has, in a plane perpendicular to the plane of the base, a profile having grooves, preferably four grooves, facing the base. This embodiment allows better ergonomics of the lever.

According to one embodiment, the device further comprises a first return spring tending to return the lever towards the first position.

According to one embodiment, the movable element is further configured so that, when the lever is moved from the second position to the first position, the movable element moves from the engaged position to the retracted position under the action of the lever.

According to one embodiment, the lever has a second contact surface and the movable element has a second support surface, the second contact surface and the second support surface being able to cooperate so that when the lever is moved from the second position to the first position, the lever moves the movable element from the engaged position to the retracted position by pushing the second contact surface on the second support surface.

According to one embodiment, the support of the second contact surface against the second support surface opposes the return due to the first return spring of the lever towards the first position.

According to one embodiment, the device comprises a return element capable of maintaining the movable element in the engaged position and in which the movable element passes from the engaged position to the retracted position when an actuating element acts on the return element so as to release the mobile element from its hold by the return element.

According to one embodiment, the first return spring is configured so that the lever returns to the first position when a user releases the lever.

The present invention also relates to a locking and unlocking system for a leaf comprising a locking and unlocking control device for a leaf according to one of the embodiments previously described, and a locking and unlocking mechanism capable of being mounted on the leaf, the locking and unlocking control device for the leaf and the locking and unlocking mechanism being able to cooperate so that when the movable element is moved from the retracted position to the engaged position, and conversely, the mechanism passes from a first locked position to a first unlocked position, and vice versa, under the action of the movable element.

Another object of the present invention relates to a leaf equipped with a locking and unlocking system as described above.

According to one embodiment, the base is embedded in an upright of the leaf.

The present invention can equip a leaf, for example based on aluminum joinery, plastic and/or wood. This could be a patio door or window. It is possible to implement the invention for sliding mounted leaves although the application to wing assemblies is not excluded. Generally speaking, a leaf comprises a frame and a filling of one or more glazed surfaces. Two vertical elements of the frame, uprights, are arranged on either side of the filling in a lateral direction. The other two frame elements are crosspieces extending horizontally. In the case of sliding leaves, the frame is guided in translation relative to the frame. The latter itself includes a frame which delimits an opening. In a position for closing this opening, the leaf is brought into contact with a corresponding amount of the frame of the frame. For safety reasons, a closing device is provided. The latter makes it possible to immobilize the leaf relative to the frame, by means of a lock. It is typically mechanically operable by the user.

The present invention provides a device allowing the user to operate a locking and unlocking system.

The device according to the invention will now be described with reference to Figures 1A to 1E, 2A to 2E and 3.

The device comprises a base 10. The base 10 has in particular a transverse dimension extending in a plane called the base plane. A part of the base 10 defines an open housing 11.

The base 10 can be mounted on a leaf. It can be mounted in a projecting or partially projecting manner in relation to an upright of the leaf. However, advantageously, the base 10 is mounted so that it is entirely recessed in the amount. The base 10 is advantageously mounted on the amount so that the base plane is parallel to, or even coincides with, a plane in which the amount mainly extends, called the plane of the amount.

The device further comprises a lever 100 mounted on the base 10 in a pivoting manner. The lever 100 can pivot around an axis of rotation 150 from a first position 1000 to a second position 2000. Advantageously, the base 10 comprises a shaft 15 having a cylindrical shape extending mainly along the axis of rotation 150. A part of the surface of the lever 100 has a shape at least partially complementary to the shaft 15 allowing it to be held at the base 10 and to pivot around it.

Preferably, the surface of the lever 100 exposed towards the outside of the amount is located in the plane of the exterior face of the latter. Thus, there is no protrusion at the level of the upright, or only a rim serving as a stop for the embedding of the base in the interior volume of the upright.

The lever further comprises an upper part 110 and a lower part 120 located on either side of the axis of rotation 150 along a longitudinal dimension of the lever 100. By pushing on the upper part 110 of the lever 100, the user can pivot the lever 100 in a direction of rotation going from the first position 1000 to the second position 2000, called the opening direction. By applying a traction force to the lower part 120 of the lever 100, the user can also rotate the lever 100 according to the opening direction. Conversely, by pushing on the lower part 120 of the lever 100, the user can rotate the lever 100 in the opposite direction to the opening direction, known as the closing direction.

The upper part 110 advantageously has a recess 111. The recess 111 preferably has a curved shape, advantageously concave. It gives the upper part 110 an ergonomic shape so that it can be pushed by the user's finger. It is however possible that the upper part 110 does not have a recess 111 and that, on the contrary, its exterior surface is flat. This embodiment makes the device more neutral and more discreet and improves its visual integration with the leaf.

The lower part 120 advantageously has grooves facing the housing. Preferably, these grooves are four in number and have dimensions and spacings between them capable of conforming to the shape of four fingers of a hand gripping the lower part 120.

Advantageously, when it is in the first position 1000, the lever 100 is fully retracted into the housing 11 (Figures 1A, 2A). The lever 100 then does not protrude relative to the base 10. This characteristic gives the device greater discretion.

In the second position 2000, the lever 100 projects relative to the base 10. The second position thus constitutes a retracted position of the lever 100. When the lever 100 is in the second position 2000, its longitudinal dimension preferably forms an angle between 45° and 65°, preferably between 50° and 60°, with the plane of the base. In this protruding position, the lever can be used to move the leaf. In the case of sliding leaves in particular, the user can in fact translate the leaf in the plane of the frame by using the lever, which itself will drive the leaf. In the case of a leaf assembly, the lever in the second position can also serve as a gripping point for the user to open or close the leaf.

The device 1 further comprises a mobile element 200. This is a part preferably extending mainly in a plane parallel to the plane of the base.

The movable element 200 and the lever 100 are configured so that when the lever moves from the first position 1000 to the second position 2000, it moves the movable element from a retracted position 210 to an engaged position 220 (figures 1C, 2C). More precisely, the lever has a first bearing surface 101 capable of cooperating with a first contact surface 201 of the movable element 200. When the lever 100 pivots in the opening direction, it applies a thrust force on the movable element 200 at the level of the contact between the first bearing surface 101 and the first contact surface 201. This thrust force drives the movable element in a vertical downward translation.

The mobile element 200 is also capable of cooperating with a locking and unlocking mechanism 300 which can be mounted on the upright of the leaf. More precisely, when the movable element 200 moves from the retracted position 210 to the engaged position 220, it moves the locking and unlocking mechanism 300 from a first locked position to a first unlocked position.

The locking and unlocking mechanism 300, subsequently called mechanism 300, comprises for example a rod called square 310 extending mainly in a direction normal to the plane of the base. The square 310 has the shape of a parallelepiped with a square base and is mounted to rotate around its axis of symmetry. The square 310 is capable of cooperating with the movable element 200, for example via a tooth 320 having a shape complementary to a connection portion 203 of the movable element 200. The tooth 320 projects relative to the square and is positioned in such a way that, when the movable element 200 translates vertically from the retracted position 210 to the engaged position 220, it drives the tooth 320 which itself rotates, by an eccentric principle, the square 310 around its axis of symmetry, for example over 90°, in a so-called unlocking direction (Figures 1C, 2C). The mobile element 200 and the mechanism 300 are particularly clearly visible in the exploded views presented in Figures 1E and 2E.

The mechanism 300 also includes a hook 340, shown in . The hook 340 is a moving part extending mainly in the plane of the upright. The hook 340 can move from a locking position to an unlocking position, and vice versa. In the locking position, the hook 340 is able to cooperate with an element of the window frame so as to lock the leaf against the frame.

The mechanism 300 further comprises a movable headrest 320 capable of cooperating with the square 310 and the hook 340. The movable headrest 320 is an element extending mainly in a plane normal to the plane of the upright and capable of translating vertically. When the square 310 pivots around its axis of rotation by the action of the movable element 200 passing from the retracted position 210 to the engaged position 220, it drives the movable headrest 320 downwards. The movable headrest 320 then itself drives the hook 340 into the unlocking position.

The passage of the mechanism 300 from the first locked position to the first unlocked position thus corresponds to a rotation, for example by 90°, of the square 310, to a vertical translation of the movable headrest and to the movement of the hook 340 from the locking position to the unlock position.

Advantageously, it is provided that the lever 100 can be pivoted from the first position 1000 to an intermediate position 1500 without moving the movable element (Figures 1B, 2B). In the intermediate position 1500, the lever 100 projects relative to the base. Preferably, in the intermediate position 1500, at least part of the lower part 120 of the lever 100 is sufficiently far from the base 10 for the user to grasp it. The longitudinal dimension of the lever advantageously forms an angle of between 15° and 30° with the plane of the base. This facilitates the gripping and manipulation of the lever by the user, who, when the lever is in the intermediate position 1500, can slide his fingers between the lower part 120 and the base 10 in order to grasp the lower part 120.

In this embodiment, when the lever 100 is in the first position 1000, the first contact surface 101 and the first bearing surface 201 are separated by a non-zero distance that the first contact surface 101 travels when the lever 100 is pivoted from the first position 1000 to the intermediate position 1500. Contact between the first contact surface 101 and the first bearing surface 201 is made when the lever reaches the intermediate position 1500. The movement of the first position 1000 at the intermediate position 1500 is preferably caused by pressing on the upper part 110. During this movement, the lever 100 not acting on the movable element, it does not undergo reciprocal force from the movable element . Moving the lever from the first position 1000 to the intermediate position 1500 therefore requires only a small force depending on the mass of the lever and the distance from the axis of rotation to which it is applied. The component relating to the thrust of the lever on the movable element only appears from the contact between the first contact surface 101 and the first support surface 201. The standard of the force necessary for the movement of the lever 100 from the first position 1000 to the intermediate position 1500 is therefore much lower than that of the force necessary to move the lever 100 from the intermediate position 1500 to the second position 2000. It is thus completely conceivable that the user uses only a finger, preferably a thumb, to move the lever 100 from the first position 1000 to the intermediate position 1500 by pressing on the upper part 110. This embodiment finds a particular advantage when, in the first position 1000, the lever 100 is fully retracted into the housing 11. The action of the user on the upper part 110 then makes it possible to partially remove the lever 100 from the housing 11. The user can for example move the lever 100 from the first position 1000 to the intermediate position 1500 by pressing on the upper part 110 with one of its thumbs and momentarily holding the lever 100 in the intermediate position 1500 using this same thumb while taking hold of the lower part 120 with the other fingers of the same hand.

The device according to one of the embodiments will now be more particularly described with reference to Figures 1A to 1E. This is an embodiment allowing automatic locking of the leaf on which the device is mounted when the leaf in question is closed up to the window frame. This embodiment is particularly suitable for windows.

In this embodiment, the device comprises a return element capable of maintaining the mobile element 200 in the engaged position 220.

The return element is further configured to release the mobile element 200 by the action of an actuating element. The movable element 200 then passes from the engaged position 220 to the retracted position 210.

The actuating element is part of the locking and unlocking mechanism 300. It may be a feeler 330 cooperating with the mobile headrest 320, as shown in the .

The probe 330 is a moving part extending mainly horizontally, parallel to the crosspieces. The sensor 330 is permanently stressed by elastic means so that it is in a protruding position relative to the leaf, in a plane normal to the plane of the upright.

As long as this feeler 330 is maintained projecting, it maintains the movable headrest 320 in a position in which it itself maintains the hook 340 in the unlocking position. In contact with the upright with the window frame when the leaf is closing, the sensor sinks and releases the movable faceplate 320. The movable faceplate 320 then translates vertically upwards and drives the hook 240 into the locking position. Simultaneously, the mobile headrest 320 rotates the square 310 around its axis of symmetry, in the opposite direction to that of the unlocking direction, known as the locking direction. The mobile element 200 is then moved, under the action of the square 310, from the engaged position 220 to the withdrawn position 210.

Thus, in this embodiment, the window is locked automatically following the simple closing of the leaf, that is to say the movement and contact of the latter against the window frame.

Advantageously, and as illustrated by the sequence of Figures 1C and 1D, when the user releases the lever 100 in a position other than the first position 1000, for example in the second position 2000, a first return spring allows the return of the lever 100 to the first position 1000. Thus, the lever 100 is only in a position other than the first position 1000 when the user unlocks the leaf. This characteristic is particularly advantageous when in the first position 1000, the lever 100 is fully retracted into the housing 11. This in fact allows the lever 100 to be permanently concealed in the housing 11 - with the exception of the few moments during which the The user proceeds to unlock -, thus giving the device even greater discretion.

This embodiment is particularly advantageous when the base 10 is embedded in the upright of the leaf. This allows, except during unlocking, no element to protrude from the amount. Thus, it is possible to make the leaf cross with another leaf, even when the leaf in question is unlocked, without damage to the device or the leaf.

The device according to another embodiment will now be more particularly described with reference to Figures 2A to 2E. This is an embodiment in which the leaf is locked manually by the user.

In this embodiment, the movable element 200 and the lever 100 are configured so that when the lever moves from the second position 2000 to the first position 1000, it moves the movable element from the engaged position 220 to the retracted position 210. More precisely, the lever has a second bearing surface 102 which can cooperate with a second contact surface 202 of the movable element 200. When the lever 100 pivots in the closing direction, it applies a pushing force on the movable element 200 at the level of the contact between the second bearing surface 102 and the second contact surface 202. This thrust force drives the movable element 200 in a vertical translation upwards ( ).

Thanks to the action of the connection portion 203 of the movable element 200 on the tooth 311, when the movable element 200 passes from the engaged position 220 to the retracted position 210, it causes the square 310 to rotate in the direction of lockdown. The rotation of the square 310 then drives the movable headrest 320 in an upward translation movement, which has the effect of moving the hook 340 from the unlocking position to the locking position.

Moving the lever 100 from the second position 2000 to the first position 1000 therefore makes it possible, in this embodiment, to move the mechanism 300 from the first unlocked position to the first locked position. In this sense, this embodiment can be described as manual.

This embodiment is particularly suitable for French windows. In fact, a user can, when locking, apply a sufficiently large force to the lever to activate a large number of elements used to attach the leaf to the window frame, such as the hook 340. For example, the leaf can have more than 3, preferably more than 4, locking points, as indicated for a French window, the vertical dimension of which is much larger than that of a window.

A second aspect of the invention relates to a locking and unlocking system comprising a locking and unlocking control device according to the invention.

Advantageously, it is expected that the system can be integrated into a leaf so as to allow closing against the frame of a window or French window at the level of the right side of the leaf (right mode) or be integrated into a leaf so as to allow closing at the level of its left side (left mode). The main difficulty is that in these two situations the locking mechanism must be driven in opposite directions.

To do this, it is advantageously provided that the mechanism 300 can be moved from a second locked position, distinct from the first locked position, to a second unlocked position, distinct from the first unlocked position, the passage from the second locked position to the second unlocked position allowing unlocking of the window in the direction opposite to the unlocking permitted by moving from the first locked position to the first unlocked position. In the same way, the passage from the second unlocked position to the second locked position allows locking of the window in the direction opposite to the locking permitted by the passage from the first unlocked position to the first locked position.

More precisely, in this embodiment, the locking and unlocking control device for the leaf and the locking and unlocking mechanism 300 are able to cooperate so that when the movable element 200 is moved from the retracted position 210 to the engaged position 220, and vice versa, the mechanism passes from the second locked position to a second unlocked position, and vice versa, under the action of the movable element 200.

For example, in the second locked/unlocked position of the mechanism 300, the square 310 can be rotated through an angle of 270° around its axis of symmetry relative to its position in the first locked/unlocked position respectively of the mechanism 300. This embodiment is illustrated in .

The transition from left mode to right mode, and vice versa, is advantageously achieved by pivoting the square 310 around its axis. Advantageously, the square 310 has a hollow 312 into which a square key or Allen key can be inserted, thus making it possible to easily rotate the square 310 from one mode to another.

Thus, with very simple manipulation to be carried out at square 310, it is possible to install the locking and unlocking system on a right leaf or a left leaf, as required.

Through the different embodiments described above, it appears that the present invention offers an alternative to existing control devices and more particularly a discreet and space-saving alternative.

Claims (16)

Device (1) for locking and unlocking control for a leaf, comprising:

• a base (10) capable of being mounted on a leaf, the base (10) having a transverse dimension extending in a plane called the plane of the base,
• a lever (100) mounted on the base (10) in a pivoting manner around an axis of rotation (150) between a first position (1000) and a second position (2000),
• a movable element (200) cooperating with the lever (100) so that when the lever (100) is moved from the first position (1000) to the second position (2000), the movable element (200) moves from a retracted position (210) to an engaged position (220) under the action of the lever (100),

and in which the movable element (200) is capable of cooperating with a locking and unlocking mechanism (300) capable of being mounted on the leaf, so that when the movable element (200) is moved from the retracted position (210) to the engaged position (220), and vice versa, the locking and unlocking mechanism (300) moves from a first locked position to a first unlocked position, and vice versa, under the action of the element mobile (200),
characterized in that the base (10) comprises a housing (11) into which the lever (100) is retracted when said lever (100) is in the first position (1000), the lever (100) projecting relative to the base (10) when said lever (100) is in the second position (2000). Device according to the preceding claim in which the lever (100) has a first contact surface (101) and the movable element (200) has a first bearing surface (201), the first contact surface (101) and the first bearing surface (201) being capable of cooperating so that when the lever (100) is moved from the first position (1000) to the second position (2000), the lever (100) moves the movable element (200) from the retracted position (210) to the engaged position (220) by pushing the first contact surface (101) onto the first bearing surface (201). Device (1) according to any one of the preceding claims in which the axis of rotation (150) is parallel to the plane of the base. Device (1) according to any one of the preceding claims in which the lever (100) has an upper part (110) and a lower part (120), the upper part (110) and the lower part (120) being located at either side of the axis of rotation (150). Device (1) according to any one of the preceding claims in which the lever (100) can be moved, without moving the movable element (200), from the first position (1000) to an intermediate position (1500) in which a at least part of the lever (100) projects relative to the base (10). Device (1) according to any one of the two preceding claims in which the upper part (110) has a recess (111) having a curved shape, preferably concave. Device (1) according to any one of the preceding claims further comprising a first return spring tending to return the lever (100) towards the first position. Device (1) according to any one of the preceding claims wherein the movable element (200) is further configured so that, when the lever (100) is moved from the second position (2000) to the first position (1000) , the movable element (200) moves from the engaged position (220) to the retracted position (210) under the action of the lever (100). Device (1) according to the preceding claim in which the lever (100) has a second contact surface (102) and the movable element (200) has a second bearing surface (202), the second contact surface (102 ) and the second bearing surface (202) cooperating so that when the lever (100) is moved from the second position (2000) to the first position (1000), the lever (100) moves the movable element (200) from the engaged position (220) to the retracted position (210) by pushing the second contact surface (102) onto the second bearing surface (202). Device (1) according to the preceding claim in combination with claim 7 in which the support of the second contact surface (102) against the second support surface (202) opposes the return due to the first return spring lever (100) towards the first position (1000). Device (1) according to any one of claims 1 to 10 comprising a return element capable of maintaining the movable element (200) in the engaged position (220) and in which the movable element (200) passes from the position engaged (220) to the retracted position (210) when an actuating element acts on the return element so as to release the movable element (200) from its hold by the return element. Device (1) according to the preceding claim in combination with claim 7 in which the first return spring is configured so that the lever (100) returns to the first position when a user releases the lever (100). System (2) for locking and unlocking a leaf comprising a locking and unlocking control device for a leaf according to any one of claims 1 to 12 and a locking and unlocking mechanism (300) capable of being mounted on the leaf, the locking and unlocking control device for the leaf and the locking and unlocking mechanism (300) being able to cooperate so that when the movable element (200) is moved from the retracted position (210) to the engaged position (220), and vice versa, the locking and unlocking mechanism (300) moves from a first locked position to a first unlocked position, and vice versa, under the action of the movable element (200). System (2) according to the preceding claim in which the locking and unlocking control device for the leaf and the locking and unlocking mechanism (300) are able to cooperate so that when the movable element (200) is moved from the retracted position (210) to the engaged position (220), and vice versa, the mechanism passes from a second locked position, distinct from the first locked position, to a second unlocked position, distinct from the first unlocked position, and vice versa, under the action of the mobile element (200). Leaf (3) equipped with a locking and unlocking system (2) according to the preceding claim. Leaf (3) according to the preceding claim in which the base is embedded in an upright of the leaf (3).