EP2773828A1

EP2773828A1 - Cover and motor block provided with said cover

Info

Publication number: EP2773828A1
Application number: EP12778310.8A
Authority: EP
Inventors: Mikaël SICOT
Original assignee: A Raymond SARL
Current assignee: A Raymond SARL
Priority date: 2011-11-03
Filing date: 2012-10-22
Publication date: 2014-09-10
Anticipated expiration: 2032-10-22
Also published as: BR112014010554A2; FR2982304B1; WO2013064387A1; BR112014010554B1; CN104011306B; EP2773828B1; FR2982304A1; ES2570558T3; CN104011306A

Abstract

The invention relates to a cover (1) including a shell (20) for closing an opening (101) and a latch (4) pivoting between "unlocked" and "locked" positions in which said latch respectively does not or does hinder the mobility of the cover (1) with respect to the support (100), the cover (1) comprising stationary stops (51) and laterally flexible latching lugs (44) provided to prevent the passage without bending of the latching lugs (44) and to latch the latch (4) in the "locked" position, the clearances (50) allowing the passage of the bent latching lugs (44) and of the unlatching wings (45) connected to the latching lugs (44) and capable of being biased laterally by hand to bend the latching lugs (44) and thus allow the unlatching of the latch (4) from the "locked" position thereof. Said cover (1) is suitable for closing an opening (101) provided in a motor block for accommodating an electronic sensor therein.

Description

Cover and engine block provided with said cover

Technical area

The invention relates generally to a lid comprising a shell provided with a first locking edge intended to bear on the edge of an orifice provided in a support for closing it with the shell, the lid comprising at least one lock provided with a second locking edge and arranged to be movable about a pivot axis between an "unlocked" position in which it does not hinder the mobility of the cover relative to the support and a "locked" position in which the second locking edge cooperates with the first locking edge to lock the cover on the support, the cover further comprising locking means of the lock in the "locked" position provided with at least one fixed stop and a heel of flexible locking, one being provided on the hull the other on the lock and able to cooperate so as to prevent the passage without bending of the locking heel from the "unlocked" position to the "b" position latched "and to latch the latch into the" locked "position.

The invention also relates to an engine block for a motor vehicle, the engine block comprising at least one orifice in which is housed at least one electronic sensor and closed by a cover.

Prior art

This type of cover is commonly used, in particular to limit access to the interior of an orifice, for example to protect equipment housed in this orifice, such as in particular electronic sensors. The support is for example the engine block of a motor vehicle which may comprise orifices each adapted to receive an electronic sensor for example for controlling the engine speed of the motor vehicle. To ensure proper operation, this sensor must be protected from the external environment of the engine. This sensor must also be easily accessible to allow maintenance and control of the engine. For this purpose, the cover must be able to be put in place without tools, with simple gestures, have a reliable maintenance over time, while satisfactorily closing the orifice, then can be removed instinctively without tools and put back into action. place easily repeatedly.

The publication FR 2 645 834 describes a box provided with a lid hinged and having locks for securing the closure of the box. The locks are pivotally mounted by means of journals carried by bearings integral with the cover. Each latch has a star shape with three branches extending from the trunnion. A first rigid branch forms a hook through a first opening in the cover. A second rigid branch forms a handle for manipulating the lock. The third leg is elastically deformable and bears on the top of the lid. When the lid is closed, the first opening is located opposite a second opening formed in the edge of the box opposite the hinge. Thus, the hook passes through this second opening. Solicited by the third elastically rigid leg, the hook clings to the wall surrounding the second opening so as to keep the closed lid closed on the box. This retractable latch cover is bulky and difficult to unlock. Indeed, each lock requires to be individually unlocked by independent pivoting. In addition, this retractable latch cover is made of several parts requiring an assembly step and making it less reliable for use in particular because of risk of dislodging a part relative to another. This lock is more bulky.

Other blocking mechanisms are known, such as, for example, the device for maintaining a control sheath described by the publication FR 2 807 120. This device comprises a base provided with four spaced lateral walls defining a quadrangular structure. The upper edge of a first wall is connected to a pivoting latch by a film hinge permitting its pivoting. This latch has a groove adapted to receive the passage of a sheath. The second wall provided opposite the first wall has an opening adapted to receive the end of the latch to lock it in the closed position, this opening being delimited by an upper cross member. The latch has a length greater than the distance separating the first and second walls. Thus, when closing the latch, the introduction of the latch in the opening of the second wall is obtained by elastic bending of the second wall to cross the upper rail. The latch is also provided with a spout bearing, in the closed position of the latch, on a stop of the first wall. This support reduces the stresses on the film hinge. The third and fourth walls are provided with cutouts for the passage of the sheath, provided on either side of the base. Unlocking and opening the latch to release the sheath are obtained by elastic bending of the second wall. The locking and unlocking of this latch require significant efforts that strongly urge the base, including bending. This device is not very resistant and intended to be opened and closed a limited number of times. Moreover, due to the nature of the gestures imposed by its use, this device is not very ergonomic. This lock is more bulky.

Also known from publication WO 01/79 638, a hood latch comprising an anchoring element intended to be housed in the orifice of a support in which it is held by means of flexible lateral tabs provided on the walls. side of the anchoring element and bearing on both sides under the edges of the orifice. This cover latch also comprises a hook connected to the body of the anchoring element by a flexible tongue, this hook being adapted, under the effect of the deformation of the flexible tab, to cooperate with a workpiece to be locked relative to the support. The anchoring element is traversed by a housing adapted to receive a latch pivoting relative to a pivot axis defined relative to the body of the anchor element. The latch is coupled to the block by a cam and has a bearing zone adapted to cooperate with the flexible tongue to deform. Thus, before pivoting, the flexible tongue is not stressed and the hook is open. When pivoting the latch, the support zone deforms the flexible tongue, causing the hook to close on the part to be blocked. The latch is also provided with lateral pins adapted to engage by deformation in orifices provided in the side walls of the anchoring element so as to define different positions of the latch. Maintaining the lock in each of its positions is however unreliable. Indeed, the unlocking of the lock to move from one position to another is obtained by forcing the passage of the lateral pins outside the orifices. This unlocking can be caused accidentally. It is impractical to obtain since it requires the application of an overpressure which improperly solves the elements constituting the lock. The lock is thereby weakened and worn prematurely. In addition, the pressure required for unlocking is difficult to measure and when the release occurs, the user does not have time to regulate the pressure that he applies with his finger. Therefore, the latch is suddenly rotated under the effect of this overpressure which may damage the side pins and make the lock unusable. Furthermore, between the two locking positions, the lateral pins are permanently in contact with the side walls of the anchoring element which generates friction which makes it more difficult to move from one position to another. Finally this lock is composed of several parts which makes its manufacture, assembly and use complex.

Presentation of the invention

The object of the invention is to overcome these disadvantages by providing a cover easy to manufacture, compact able to be locked and unlocked by simple gestures instinctively and repeatedly, the locking and unlocking do not impose the mechanical stress that elements directly concerned to avoid premature deterioration of the cover, the elements involved in the locking and unlocking are solicited only during the locking and unlocking respectively to improve the life of the cover, the cover can be securely fixed to the support to effectively protect the area under the lid.

For this purpose, the subject of the invention is a lid comprising a shell provided with a first locking edge intended to bear on the edge of an orifice provided in a support for closing it with the shell, the lid comprising at least one less a latch provided with a second locking edge and arranged to be movable about a pivot axis between an "unlocked" position in which it does not hinder the mobility of the cover relative to the support and a "locked" position in which the second locking edge cooperates with the first locking edge to lock the cover on the support, the cover further comprising locking means of the lock in the "locked" position provided with at least one fixed stop and of a flexible locking heel, one provided on the shell and the other on the latch and adapted to cooperate so as to prevent the passage without bending of the locking heel from the "unlocked" position to the "locked" position and to lock by clamping the lock in the "locked" position, characterized in that the locking heel is oriented perpendicularly to the pivot axis and laterally flexible, parallel to the pivot axis, in that the cover comprises means unlocking device capable of releasing the lock from the "locked" position comprising at least one unlocking fin secured to the locking heel and a clearance offset laterally with respect to the fixed stop and able to allow the passage of the bent locking heel, in that the unlocking fin is arranged to be, in the "locked" position, accessible on the other side of the shell with respect to the locking heel and able to be manually biased laterally to flex the locking heel.

With the lid according to the invention, the locking heel is oriented perpendicularly to the pivot axis, it is thus biased in bending only punctually during the passage of the fixed stop. As a result, it is less likely to be damaged. The unlocking wing allows to unlock the lock in a simple and ergonomic way, with a measured effort to the fair, this effort being applied only on the unlocking fin. Thus, to unlock the lock, there is no need to force on the fixed stops and the hull is not solicited inappropriately. The unlocking fin is also easily accessible which simplifies the use of the lid, in particular its unlocking. Finally, the unlocking obtained by a lateral movement, parallel to the pivot axis, makes it possible to perform the unlocking movements instinctively.

The device according to the invention may advantageously have the following particularities:

the lock comprises at least one hook defining the second locking edge and secured to a pallet oriented parallel to the pivot axis, adapted to be manually biased to rotate the lock from the "unlocked" position to the "locked" position , the pallet and the hook being arranged on either side of the pivot axis;

the locking heel and the unlocking fin are carried by the lock, and the fixed stop and the clearance are carried by the hull; - The shell has at least one opening tangent to its periphery and defined in part by the pivot axis, the opening being adapted to receive at least partly the latch, the opening and the pallet being dimensioned so that the pallet at least partly closes the opening in the "locked" position of the latch, the opening comprising at least one recess defining on the one hand the clearance and on the other hand the fixed stop; the edge of the opening and the free end of the pallet opposite the pivot axis are provided with complementary shapes adapted to bear against each other when the lock is pivoted beyond the position "blocked" to form a first stop arranged to limit the pivoting of the lock;

the lid is made in a one-piece molded part, the pivot axis is formed by two torsion bars connecting on each side of the lock to the shell, the pivoting of the lock between the "locked" and "unlocked" positions being obtained by elastic torsion of the torsion bars;

the hook and the pallet respectively have a first flat portion of hook and a first flat portion of pallet substantially parallel to each other so that the lock is adapted to adopt an "unlocked" position in which the first flat portions of hook and pallet are substantially perpendicular to the support plane;

the first flat hook portion is connected to the pivot axis by a second flat hook portion inclined relative to the first flat hook portion so as to form a first open angle, the first flat pallet portion is directly connected to the pivot axis and extended by a second flat pallet portion defining an inclined tongue and forming a second open angle with respect to the first flat pallet portion, the first and second angles being substantially equal so that the second planar portions of hook and pallet are substantially parallel to each other, the first locking edge defines a support plane of the shell on the support and the unlocking fin extends from the locking heel in a plane substantially perpendicular to the support plane and substantially perpendicular to the pivot axis;

the cover comprises two locking lugs, two fixed stops arranged on both sides of two clearances, and two fins of unlocking adapted to be brought closer to each other by pinching to cause the lateral bending of the locking heels.

The invention also relates to an engine block for a motor vehicle, the engine block comprising at least one orifice in which is housed at least one electronic sensor and closed by a cover, said engine block comprising at least one cover as described above the orifice to close the orifice and protect the electronic sensor.

Brief description of the drawings

The present invention will be better understood and other advantages will appear on reading the detailed description of an embodiment taken by way of non-limiting example and illustrated by the appended drawings, in which:

Figures 1 and 2 are perspective views of the lid according to the invention with the lock in the "unlocked" position;

Figure 3 is a sectional view along the plane AA of Figure 2 of the lid according to the invention with the lock in the "unlocked" position; Figure 4 is a sectional view along the plane BB of Figure 2 of the lid according to the invention with the lock in the "locked" position.

Description of the preferred embodiment

With reference to the figures, the lid 1 according to the invention is intended to be used to close an orifice 101 provided in a support 100, such as for example an engine block. This lid 1 comprises a shell 2, fixing lugs 3 and a lock 4.

The shell 2 comprises a generally planar plate 20 from which extends a skirt 21 substantially perpendicular to the plate 20 and intended to be housed in the orifice 101. In plan view, the plate 20 has a generally trapezoidal shape. The plate 20 has a cavity oriented towards the bottom and forming a relief 22 on its upper face and a housing (not visible) under its underside. This cavity is adapted to receive for example the relief of a sensor (not shown) provided in the housing. The housing opens laterally from the plate 20 through a passage 24 open downwards and adapted to receive for example a power supply cable and / or communication connecting the speed sensor of the engine to an electronic entity of the motor vehicle. This passage 24 is delimited in the lower part by a springback 25 for gripping the cable. The skirt 21 is thus interrupted opposite this passage 24 and opposite the lock described below. The skirt 21 makes it possible to guarantee the correct positioning of the lid 1 with respect to the orifice 101. It is understood that the cover 1 may have any other suitable form. The cover 1 comprises a rim defining a first locking edge 23 provided at the junction between the skirt 21 and the plate 20. This first locking edge 23 extends on the periphery of the shell 2 and defines a support plane P (Diagrammatically in Figures 1, 2 and 4) of the shell 2 on the edges of the hole 101 of the support 100. The prominence of this first locking edge 23 is provided so that it comes in support above the edges of the orifice 101 when the skirt 21 is housed in the orifice 101. This first locking edge 23 may be continuous or discontinuous. In the example illustrated, the skirt 21 also carries two fastening lugs 3 provided on the edge of the shell 2 opposite that carrying the latch 4. These fastening lugs 3 extend substantially parallel to the support plane P, in a separate plane to the support plane P so as to define a fixed engagement zone adapted to receive edges of the hole 101 of the support 100 between the fixing lugs 3 and the first locking edge 23. Thus, the cover 1 may be presented inclined in the orifice 101 so that one of the edges of the orifice 101 is engaged between the fixing lugs 3 and the first locking edge 23, before being tilted in support over the entire length of the first locking edge 23. It is understood that the cover may have several locks on one or more sides and / or be free of fixing lug. The shell 20 has an opening 5, tangent to the edge of the shell 20 opposite that carrying the fixing lugs 3. The opening 5 is closed laterally by a pivot axis C formed by two coaxial torsion bars 6, substantially similar between they, extending on either side of the latch 4. In this example, the opening 5 has a substantially rectangular shape. However, the edge of the opening 5, opposite to the pivot axis C, comprises two recesses each defining a clearance 50 and a fixed stop 51 whose functions are explained below. The recesses are provided in the pivoting path of the latch 4 so that the fixed stops 51 are separated by the clearances 50. According to embodiments not shown, the clearances can be provided outside the fixed stops, or the stops fixed and clearances may be interposed. At the upper face of the shell 20, each fixed stop 51 defines a V-shape tangent to the edges of the opening 5 and whose branches facing each other comprise an inclined plane 52 or rounded whose function is explained below. The recesses are separated, on the upper face of the shell 20, by a bulge 53 intended to form a first stop to limit the pivoting of the latch 4.

The latch 4 comprises a pallet 40 of rectangular shape, substantially flat, adapted to receive the support of a finger of a user to be manually biased towards the opening 5 and rotate the latch 4. The pallet 40 may comprise grooves 49 (visible in Figure 1) limiting the sliding of the heel soliciting and stiffening. The latch 4 can thus be pivoted between an "unlocked" position in which it does not hinder the mobility of the cover 1 relative to the support 100 and a "locked" position in which it cooperates with the shell 20, in particular via fixing lugs 3 and the first locking edge 23, for locking the cover 1 on the support 100. This pallet 40 is directly tangential to the pivot axis C and situated in a plane substantially parallel to this axis. latest. The free edge of the pallet 40 opposite to the pivot axis C is extended by an inclined tongue 41. The pallet 40 defines a first flat portion 400 adapted to receive the support of the user's finger, the inclined tongue defines a second flat pallet portion 401 also adapted to receive the support of the user's finger, the first and second flat pallet portions 400, 401 being separated by a second angle β visible in Figure 4. The inclined tongue 41 is adapted to cooperate with the bulge 53 to limit the pivoting of the latch 4 beyond the "locked" position. The bulge 53 can be inclined in a complementary manner to the inclined tongue 41. The bulge 53 can be consolidated by two ribs 54 connecting it to the shell 20. The bulge 53 and the inclined tongue 41 thus form complementary shapes defining a first stop. When in abutment, the bulge 53 and the inclined tongue 41 form a stop plane P '(diagrammatically in FIG. 4) inclined with respect to the support plane P. In the "unlocked" position, illustrated in particular by the 3, the pallet 40 extends above the shell 20, opposite the skirt 21. In the "locked" position, illustrated in FIG. 4, the pallet 40 is included in the thickness of the shell 20.

The latch 4 also comprises a curved hook 42 forming a second locking edge 7. The hook 42 is adapted, when the latch 4 is in the "unlocked" position, not to protrude outwards with respect to the skirt 21 and when the latch 4 is in the "locked" position, laterally passing the second locking edge 7 of the skirt 21 so as to block, from below, the edge of the orifice 101 between the first locking edge 23 of the hull 20 and the second locking edge 7 of the latch 4. The hook 42 and the pallet 40 are arranged on either side of the pivot axis C of the latch 4. Thus, in the "unlocked" position and in the the "locked" position, the hook 42 extends below the shell 20, on the same side as the skirt 21. In the example shown, the hook 42 is in the form of an open V formed of a first flat hook portion 420 connected to the pivot axis C by a second flat hook portion 421. The first and second flat hook portions 420, 421 are separated by a first visible angle α in FIG. 4. The first angle α is substantially equal to the second angle β so that the first flat portions of hook 420 and pallet 400 are substantially parallel between they and the second flat portions of hook 421 and pallet 401 are also substantially parallel to each other.

The latch 4 also comprises two unlocking wings 45 disposed on either side of the pallet 40 and extending from the pivot axis C in planes substantially parallel to each other and substantially perpendicular to the pivot axis C and to the support plane P. According to an embodiment not shown, the unlocking vanes may be inclined relative to the pivot axis and / or relative to each other. The latch 4 also comprises two locking lugs 44 extending from the pivot axis C, substantially perpendicular to the pivot axis C and having a length, starting from the pivot axis C, greater than the distance separating the pivot axis C of the fixed stops 51. In addition, the locking stubs 44 are arranged to be in the path of the fixed stops 51 formed by the opening 5 when the latch 4 pivots between its "locked" and "unlocked" positions. Thus, without deformation, the ends of the locking stubs 44 can not cross the fixed stops 51. The ends of the locking stubs 44 are bevelled so as to cooperate with the inclined planes 52 of the fixed stops 51 to transversely deform the locking stubs 44 until they are facing the recesses 50 and that they can cross the fixed stops 51. Thus, the crossing of the fixed stops 51 by the locking stubs 44 between the "unlocked" position and the "locked" position of the latch 4 is obtained by transversely deforming each locking stub 44 during the manual loading of the pallet 40 5. In the illustrated example, from the arrangement of the fixed stops 51 and the recesses 50, the locking stubs 44 are biased toward each other. After crossing the fixed stops 51, the heels of locking 44 and the fixed stops 51 prevent the return of the latch 4 to its "locked" position. The locking stubs 44 and the fixed stops 51 thus form latch locking means 4 in its locked position. The unlocking vanes 45 are offset angularly with respect to the locking stubs 44 away from the shell 20. Thus, when the support plane P is horizontal with the skirt 20 placed below this support plane P , the unlocking vanes 45 extend above the locking heels 44. After crossing the fixed stops 51, in the "locked" position of the lock 4, the unlocking vanes 45 remain accessible on the other side of the hull. 20, here above, relative to the locking stubs 44. The unlocking vanes 45 are thereby easily manipulated.

A removal of material 46 (visible in FIGS. 3 and 4) is provided between the ends of the locking stubs 44 and those of the unlocking vanes 45. This removal of material 46 allows, as detailed below, the lateral bending of the vanes Unlocking 45. In addition, the release vanes 45 rigidly attached to the locking stubs 44 and elastically deformable connected relative to the pivot axis C. Thus, a transverse manual bias on the unlocking vanes 45 causes the lateral deformation of the unlocking vanes 45, causing lateral deformation of the locking lugs 44 to bring the end of each locking lug 44 facing the corresponding clearance 50 and allowing the fixed stops 51 to pass through the locking lugs 44. The material withdrawals 46 allow lateral flexing of the unlocking vanes 45 without that these do not come into contact with the edges of the inclined tongue 41. The unlocking vanes 45 and the recesses 50 form unlocking means able to unlock the latch 4 to allow its passage from its "locked" position to its "unlocked" position. To promote lateral deformation of the unlocking vanes 45 and the locking stubs 44, the lateral uprights 43 and the pallet 40 are joined at the pivot axis C and disjointed to their free ends. In addition, the free end of each unlocking fin 45 is provided with a protruding ridge 47 limiting the sliding of the user's finger when he is gripping the unlocking vanes 45 towards each other and pulling on the latch 4 to unlock it as described later.

Each lateral upright 43 is provided with a lug 48 extending transversely, opposite the pallet 40, so as to be located in the path of the edge of the orifice 101 during the pivoting of the latch 4. The distance between the ends of the two lugs 48 is thus greater than the width of the opening 5. The lugs 48 are further arranged so as to come into contact with the edges of the orifice 101 only after the latch 4 has reached its "locked" position. Thus, these lugs 48 and the edges of the orifice 101 form a second stop to limit the pivoting of the latch 4 beyond the "locked" position.

The latch 4 and the shell 20 are connected by the torsion bars 6 provided in the direct alignment of the edge of the shell 20 and defining the pivot axis C. These torsion bars 6 are elastically deformable so as to allow their torsion to follow the pivoting of the latch 4 about the pivot axis C between its "unlocked" and "locked" positions. The lid 20 is thus made in a one-piece molded part, for example obtained by molding. The lid 1 is thus easy to produce. It does not require assembly which limits the risk of parts loss and facilitates its use. To allow the release of the lid 1, the pallet 40 defines a first flat portion of pallet 400 substantially parallel to the first flat portion of the hook 420. Thus, the latch 4 can adopt an "unlocked" position in which the first flat portions of the hook 420 and pallet 400 are substantially perpendicular to the plane of support P. Similarly, the inclined tongue 41 extending the pallet 40 forms a second flat pallet portion 401 substantially parallel to the second flat hook portion 421.

According to other embodiments not shown, the cover can be formed in several parts, for example a shell provided with bearings receiving rods secured to the lock, or a shell provided with bearings receiving a pivot shaft around which the lock is pivotable. In these embodiments the latch and the shell may be separated by a torsion spring-type resilient biasing element tending to press the latch into one of its positions.

The shape and dimensions of the opening 5 and the latch 4 are provided so that, when the latch 4 is in its "locked" position, the opening 5 is largely closed by the pallet 40. Thus, the sensor housed in the hole 101 of the support 100 is protected from the external environment and is unlikely to be damaged.

In another embodiment not shown, the locking lugs and unlocking wings can be carried by the shell, the latch then being provided with clearances. In this embodiment, the pivoting of the lock from the "unlocked" position to the "locked" position is obtained by a direct action on the lock, whereas, unlike the illustrated embodiment, the unlocking of the lock is obtained by an action on the release wings carried by the hull and not by the lock.

In the example shown, the latch 4 comprises two locking lugs 44, two unlocking vanes 45 and the opening 5 has two fixed stops 51 and two clearances 50. It is understood that the lock may comprise a locking heel and a single unlocking fin, the opening then being provided with a single clearance and a single fixed stop. According to yet another embodiment not shown, the clearance can provide clearances provided on either side of the fixed stops. Thus, to unlock the latch, one will move away from one another the unlocking wings bearing the locking heels to make them cross the rigid stops. To be mounted on the support 100, the cover 1 is presented above the orifice 101, the skirt 21 being oriented towards the support 100, the 1 being inclined so as to engage the edge of the hole 101 between the fixing lugs 3 and the first locking edge 23. The lid 1 is then tilted so as to bring the first locking edge 23 in contact with its entire length on the support 100. During this tilting, the fixing lugs 3 remain engaged under the edge of the orifice 101. After tilting, the skirt 21 is encircled by the orifice 101. In this engaged position, the hook 42 does not protrude outwardly from the skirt 21.

To lock the lid 1 on the support 100, the user exerts, by means of a finger, a pressure on the pallet 40. By pressing on the inclined tongue 41, this pressure can be exerted substantially parallel to the support plane P. This pressure can also be applied in an inclined manner relative to the support plane P or perpendicularly to the same support plane P. During the pivoting of the lock 4, the pallet 40 inclines towards the support plane P and the hook 42 protrudes laterally from the skirt 21 to engage under the edge of the orifice 101. The locking stubs 44 arrive punctually in contact with the fixed stops 51. The beveled ends of the locking stubs 44 force them to deform laterally towards the pallet 41 so as to bring them facing the clearances 50 and to cross the fixed stops 51 behind which they resume their initial position. The latch 4 is thus locked in its "locked" position in which the hook 42, engaged under the edges of the support 100, in cooperation with the support plane P and the fixing lugs 3, secures the lid 1 to the support 100. The pivoting of the latch 4 beyond its "locked" position is prevented on the one hand by the bulge 53 of the shell 20 bearing against the inclined tongue 41 extending the pallet 40 and on the other hand by the lugs 48 coming from resting on the upper edges of the opening 5 of the shell 20.

To unlock the cover 1 of the support 100, by a clamping effect of his fingers, the user deforms the unlocking vanes 45 towards each other in a direction substantially parallel to the pivot axis C and at the support plane P. This simultaneous action on the unlocking vanes 45 is simple to perform instinctively. The unlocking vanes 45 brought towards each other occasionally cause the lateral deformation of the locking stubs 44 until they are opposite the recesses 50. At this stage, the user pulls the latch 4 towards him. so that the locking heels 44 cross the fixed stops 51 behind which they resume their original position. The latch 4 is then in its "unlocked" position.

The lid 1 according to the invention may be repeatedly biased to access the orifice 101 and for example the sensor housed therein. The latch 4 is easily actuable instinctively. The fact that the locking and unlocking forces are to exercise substantially parallel to the support plane P improves the ergonomics of the lid 1 and facilitates its use. In addition, the configuration of the locking and unlocking means makes it possible to limit the impact of the mechanical stresses of locks and unlockings to only the elements directly involved. In addition, the size of the lid is limited to the strict minimum. Finally, the particular design of the lid 1 allows it to be made of a single molded piece which is very advantageous from an industrial point of view. The lid is for example made of plastic material such as for example polyamide, polypropylene.

It is thus noted that the effort to lock the latch 4 by pressing the pallet 40, namely a force substantially perpendicular to the pivot axis C, and the effort to bend the unlocking vanes 45, namely a force substantially parallel to the pivot axis C, are crossed and oriented perpendicularly to one another. It is thus easy for the user to differentiate the gestures he must perform successively to lock the lock 4 and unlock it. The use of the lid 1 according to the invention is thus facilitated.

Claims

1. Cover (1) comprising a shell (20) provided with a first locking edge (23) intended to bear on the edge of an orifice (100) provided in a support (100) for closing it with said shell ( 20), said cover (1) comprising at least one latch (4) provided with a second locking edge (7) and arranged to be movable about a pivot axis (C) between an "unlocked" position in which it does not hinder the mobility of said cover (1) with respect to said support (100) and a "locked" position in which said second locking edge (7) cooperates with said first locking edge (23) to block said cover ( 1) on said support (100), said cover (1) further comprising locking means (44, 51) of said latch (4) in said "locked" position provided with at least one fixed stop (51) and a flexible locking lug (44), one being provided on said shell (20) and the other on said latch (4) and able to cooperate so as to prevent the passage without bending of said locking heel (44) from said "unlocked" position to said "locked" position and to lock by clamping said latch (4) in said "locked" position, characterized in that said heel locking device (44) is oriented perpendicularly to said pivot axis (C) and laterally flexible, parallel to said pivot axis (C), in that said cover (1) comprises unlocking means (45, 50) adapted to release said latch (4) of said "locked" position comprising at least one unlocking fin (45) integral with said locking heel (44) and a recess (50) offset laterally with respect to said fixed stop (51) and adapted to allow the passage said locking lug (44) bent, in that said unlocking fin (45) is arranged for, in said "locked" position, to be accessible on the other side of said shell (20) with respect to said heel of lock (44) and adapted to be manually biased laterally to bend said locking lug (44).

2. Lid (1) according to at least the preceding claim, characterized in that said latch (4) comprises at least one hook (42) defining said second locking edge (7) and integral with a pallet (40) oriented parallel said pivot axis (C), manually operable to rotate said latch (4) from said "unlocked" position to said "locked" position, said pallet (40) and said hook (42) being arranged on each side; another of said pivot axis (C).

3. Cover (1) according to at least one of the preceding claims, characterized in that said locking heel (44) and said unlocking fin (45) are carried by said latch (4) and in that said fixed stop (51) and said clearance (50) are carried by said shell (20).

4. Lid (1) according to at least claims 2 and 3, characterized in that said shell (20) comprises at least one opening (5) tangential to its periphery and defined in part by said pivot axis (C), said opening (5) being adapted to receive at least partly said latch (4), said opening (5) and said pallet (40) being dimensioned so that said pallet (40) at least partially closes said opening (5) in said "locked" position of said latch (4), said opening (5) having at least one recess defining on the one hand said clearance (50) and on the other hand said fixed stop (51).

5. Lid (1) according to the preceding claim, characterized in that the edge of said opening (5) and the free end of said pallet (40) opposite said pivot axis (C) are provided with complementary shapes adapted to abut against each other when pivoting said latch (4) beyond said "locked" position to form a first stop arranged to limit the pivoting of said latch (4).

Cover (1) according to at least one of the preceding claims, characterized in that it is made in a one-piece molded part, in that said pivot axis (C) is formed by two torsion bars (6 ) connecting on each side said latch (4) to said shell (20), the pivoting of said latch (4) between said "locked" and "unlocked" positions being obtained by elastic torsion of said torsion bars (6).

7. Lid (1) according to at least claim 2, characterized in that said hook (42) and said pallet (40) respectively have a first flat hook portion (420) and a first flat pallet portion (400) substantially parallel to each other so that said latch (4) is adapted to adopt an "unlocked" position in which said first flat portions of hook (420) and pallet (400) are substantially perpendicular to said bearing plane (P).

8. Lid (1) according to at least claim 7, characterized in that said first flat hook portion (420) is connected to said pivot axis (C) by a second flat hook portion (421) inclined relative to said first flat hook portion (420) so as to form a first open angle (a), in that said first flat pallet portion (400) is directly connected to said pivot axis (C) and extended by a second flat portion of pallet (401) defining an inclined tongue (41) and forming a second angle (β) open relative to said first flat pallet portion (400), said first and second angles (, β) being substantially equal so that said second flat portions of hook (421) and pallet (401) are substantially parallel to each other, in that said first locking edge (23) defines a bearing plane (P) of said shell (20) on said support (100). ) and that said fin of unlocking (45) extends from said locking lug (44) in a plane substantially perpendicular to said bearing plane (P) and substantially perpendicular to said pivot axis (C).

9. Lid (1) according to any one of the preceding claims, characterized in that it comprises two locking lugs (44), two fixed stops (51) arranged on either side of two recesses (50), and two unlocking wings (45) adapted to be pressed together to cause said lateral bending of said locking heels (44).

10. Motor unit (100) for a motor vehicle, said motor unit (100) comprising at least one orifice (101) in which at least one electronic sensor is housed and closed by a cover, characterized in that it comprises at least one cover (1) according to at least one of claims 1 to 9 for closing said orifice (101) and protecting said electronic sensor.