fastening device

Abstract

The invention relates to a fastening device (100) comprising: - a mounting member (200) which comprises a head, provided with a first face and a second face, the mounting member (200) comprises a hollow cylindrical section and a pointed section, said cylindrical section defining an access channel; - a locking pin (300), provided with a push button and a rod, the rod being intended to be engaged, advantageously in sliding connection, in the access channel by the first face; - a flexible clip, the flexible clip being configured to deploy in a divergent manner relative to a direction going from the pointed section towards the head as soon as the rod engaged in the access channel adopts a position called the locking position. Figure 4

Description

Title of the invention: fastening device FIELD OF THE INVENTION

[0001] The invention relates to the field of fastening devices. In particular, the present invention relates to a fastening device making it possible to limit the forces when anchoring parts and more particularly deflectors on the underbody of motor vehicles. TECHNOLOGICAL BACKGROUND OF THE INVENTION

[0002] Motor vehicles include a number of parts fixed to the bodywork and in particular to the underbody. Among these parts, there are in particular deflectors which play a protective role and which also improve the aerodynamics of said vehicles.

[0003] Fixing the deflectors generally involves the use of threaded studs and nuts. In particular, the studs may be formed projecting from cross members of the rocker panel and inserted into openings in the deflector before securing the latter with nuts.

[0004] However, this solution is a source of musculoskeletal problems for people installing such deflectors.

[0005] Furthermore, the movement of the studs affects the aerodynamics of motor vehicles.

[0006] An aim of the present invention is therefore to propose an attachment device making it possible to limit the arduousness of work, and in particular the musculoskeletal disorders likely to affect the people involved in the assembly of the deflectors.

[0007] Another object of the present invention is also to propose a fastening device having a low impact on the aerodynamics of motor vehicles when it comes to implementing them for the fixing of deflectors. BRIEF DESCRIPTION OF THE INVENTION

[0008] The aims of the invention are, at least in part, achieved by a fastening device intended to anchor a part, called the supported part, by one of its faces, called the lower face, on a face, called the support face of a support, the supported part comprising at least one opening, called the anchoring opening, and passing through said supported part from an upper face to the lower face opposite the upper face, said anchoring opening being intended to be placed in correspondence with an opening, called the support opening, passing through the support from its support face to a face, called the internal face and opposite the support face, the fastening device comprising:

[0009] - a mounting member which comprises a head, provided with a first face and a second face parallel to each other, the mounting member also comprises a hollow cylindrical section, which extends, in a direction XX', from the second face and ends in a pointed section, said cylindrical section defining an access channel opening through the first face, said cylindrical section being intended to be engaged in an anchoring opening and in a support opening in correspondence with the anchoring opening considered with a view to anchoring the part carried on the support face;

[0010] - a locking pin, provided with a push button and a rod, the rod being intended to be engaged, advantageously in sliding connection, in the access channel by the first face;

[0011] the fixing device further comprises at least one flexible clip, the at least one flexible clip being configured to deploy in a divergent manner relative to a direction going from the pointed section towards the head as soon as the rod engaged in the access channel adopts a position called the locking position, the deployment of the at least one flexible clip, as soon as the cylindrical section is engaged in an anchoring opening and in a support opening and the head bearing against the upper face, positioning the free end of said flexible clip bearing against the internal face of the support.

[0012] According to one embodiment, the head is circular in shape and comprises at least one flexible upper tab, the at least one upper tab extending from the contour of the head and is oriented so as to oppose by spring effect the contact between the second face and the upper face of the carried part when the cylindrical section is engaged in the anchoring opening.

[0013] According to one embodiment, the at least one tab is also configured to allow the centering of the mounting member relative to the anchoring opening, the centering implementing cooperation between the at least one tab with a circular chamfer formed on the upper face and inside which the anchoring opening is centered.

[0014] According to one embodiment, the mounting member comprises at least one lower tab which extends from the cylindrical section and which is configured to exert a force against the lower face when the cylindrical section is engaged in the anchoring opening.

[0015] According to one embodiment, the at least one lower tab comprises, from its base towards its free end, a first section and a second section, said lower tab being configured to flex at the junction between the first section and the second section.

[0016] According to one embodiment, the at least one lower tab is associated with a support tab which extends in a divergent manner relative to the lower tab. lower part to which it is associated, the support tab being configured to bear against the support face when the cylindrical section is engaged in an anchoring opening and in a support opening.

[0017] According to one embodiment, the at least one flexible clip is formed in the thickness of the cylindrical section, and comprises an external boss configured to allow pre-snapping of the cylindrical section when the latter is partially engaged in the support opening.

[0018] According to one embodiment, the rod is configured to exert a force on the at least one flexible clip when said rod is in its locking position, the force exerted leading to the deployment of the at least one flexible clip.

[0019] According to one embodiment, the rod comprises two lateral strips configured to cooperate with slots formed in the cylindrical section, said cooperation making it possible to maintain the locking pin and the mounting member in a delivery position, said delivery position being a position for which the locking pin is maintained on the mounting member, and from which, said locking pin can adopt the locking position as soon as a pushing force is exerted against the push button in order to continue the engagement of the rod in the access channel.

[0020] According to one embodiment, the attachment device also comprises latching means configured to hold the push button latched against the head when the locking pin is in the locking position.

[0021] According to one embodiment, the at least one flexible clip is carried by the rod, while the cylindrical section comprises at least one lateral opening allowing the deployment of the at least one flexible clip when the rod is in the locking position.

[0022] According to one embodiment, the at least one lateral opening and the at least one flexible clip are configured so that when a pushing force is exerted on the push button in order to engage the rod beyond the locking position, said at least one flexible clip retracts internally to the cylindrical section.

[0023] According to one embodiment, the head comprises locking means configured to hold the locking pin in the locking position.

[0024] According to one embodiment, the locking means comprise stops and snap-fastening means.

[0025] According to one embodiment, the rod and the cylindrical sections are shaped to prevent any rotation of said rod when the latter is engaged in the cylindrical section.

[0026] The invention also relates to an assembly comprising a carried part and a support, said carried part being anchored, by one of its faces, called the lower face, on a face, called the support face of the support, the carried part comprising at least one opening, called the anchoring opening, and passing through said carried part from an upper face to the lower face opposite the upper face, said anchoring opening being intended to be placed in correspondence with an opening, called the support opening, passing through the support from its support face to a face, called the internal face and opposite the support face, the anchoring of the carried part on the support implementing at least one attachment device according to the present invention, said attachment device being engaged in the anchoring opening and in the support opening in correspondence with the anchoring opening.

[0027] According to one embodiment, the anchoring opening, of generally circular shape, also comprises lateral recesses.

[0028] According to one embodiment, the anchoring opening is circumscribed by a circular rib formed on the lower face.

[0029] According to one embodiment, the part carried is a deflector and the support is an automobile underbody. Brief description of the drawings

[0030] Other characteristics and advantages of the invention will emerge from the detailed description which follows with reference to the appended figures in which:

[0031] [Fig-1] [Fig.l] is a schematic representation of a part capable of being carried to be anchored to a support by means of the anchoring device according to the present invention, in particular, [Fig.l] represents the part carried according to a perspective view by its upper face;

[0032] [Fig.2] [Fig.2] is a schematic representation of the part carried in [Fig.l] and according to a cutting plane perpendicular to the upper face, the cutting plane passing through the center of the circular rib;

[0033] [Fig.3] [Fig.3] is a schematic representation of a support according to a view in perspective through the supporting face;

[0034] [Fig.4] [Fig.4] is a schematic representation of a fastening device according to a first embodiment of the present invention, in particular, [Fig.4] represents the attachment device in a perspective and exploded view;

[0035] [Fig.5] [Fig.5] represents in a perspective view the mounting member of [Fig.4];

[0036] [Fig.6] [Fig.6] illustrates schematically, and according to a perpendicular section plane dicular to the first face, the mounting member of [Fig.4], engaged, by its conical section and in order, in the anchoring opening and in the support opening;

[0037] [Fig.7] [Fig.7] schematically illustrates a lower tab above capable of being implemented within the scope of the present invention;

[0038] [Fig.8] [Fig.8] shows in perspective the locking pin of [Fig.4];

[0039] [Fig.9] [Fig.9] shows, in a perspective view, the locking pin engaged in the access channel in a delivery position;

[0040] [Fig. 10] [Fig. 10] shows, in a perspective view and along a sectional plane, the attachment device in a delivery position and engaged in pre-assembly in the anchoring opening;

[0041] [Fig. 11] [Fig. 11] represents a step, following pre-assembly, of engaging the conical section in the support opening;

[0042] [Fig. 12] [Fig. 12] represents a pre-engagement step;

[0043] [Fig. 13] [Fig. 13] represents a locking step;

[0044] [Fig. 14] [Fig. 14] represents the attachment device according to a second mode of embodiment of the present invention, according to a perspective view;

[0045] [Fig.15] [Fig.15] represents the locking pin of [Fig.14]. DETAILED DESCRIPTION OF THE INVENTION

[0046] The present invention relates to a fastening device, and in particular a fastening device intended to anchor a part, called a supported part, on a support face of a support.

[0047] The part carried may in this respect comprise a deflector, while the support may be a rocker panel of a motor vehicle.

[0048] It is nevertheless understood that the present invention is not limited to an attachment device having the sole function of anchoring a deflector on a motor vehicle.

[0049] Thus, the present invention relates to an attachment device intended to anchor a part, called a supported part, by one of its faces, called the lower face, on a face, called the support face of a support, the supported part comprising at least one opening, called the anchoring opening, and passing through said supported part from an upper face to the lower face opposite the upper face, said anchoring opening being intended to be placed in correspondence with an opening, called the support opening, passing through the support from its support face to a face, called the internal face and opposite the support face, the attachment device comprising:

[0050] - a mounting member which comprises a head, provided with a first face and a second face parallel to each other, the mounting member also comprises a hollow cylindrical section, which extends, in a direction XX', from the second face and ends in a pointed section, said cylindrical section defining an access channel opening through the first face, said cylindrical section being intended to be engaged in an anchoring opening and in a support opening in correspondence with the anchoring opening considered for the purpose of anchoring of the part carried on the support face;

[0051] - a locking pin, provided with a push button and a rod, the rod being intended to be engaged, advantageously in sliding connection, in the access channel by the first face;

[0052] the fixing device further comprises retaining means and two flexible clips, the retaining means being configured to retain the locking pin engaged in the access channel, while the two flexible clips are configured to deploy in a divergent manner relative to a direction going from the pointed section towards the head as soon as the rod engaged in the access channel adopts a position called the locking position, the deployment of the flexible clips, as soon as the cylindrical section is engaged in an anchoring opening and in a support opening and the head bearing against the upper face, positioning the free ends of said flexible clips bearing against the internal face of the support.

[0053] The present invention will be described below by considering two flexible clips. It is nevertheless understood that a single clip can also be considered, and that in general, the present description can be read by considering "at least one clip".

[0054] The present invention considers by default a “conical section”. In this regard, the latter can take a conical or pyramidal shape. Reference will also be made throughout the remainder of the statement to a “conical section” instead of a “pointed section”. However, this clarification is not such as to limit the present invention so that those skilled in the art will be able to consider a “pointed section” in its greatest generality.

[0055] The present description also refers to tabs and, in particular, to at least one upper tab, at least one lower tab and at least one support tab. It is understood that a tab obviously comprises a tab-shaped element but also an umbrella-shaped element and therefore having a symmetry of revolution.

[0056] By "cylindrical section" is meant an element generated by parallel generating lines. More particularly, and in accordance with this definition, the cylindrical section is not limited to an element whose intersection with a section plane perpendicular to the generators is a circle. Indeed, and in accordance with this definition, the person skilled in the art may consider an intersection of any shape, for example square, oblong, etc.

[0057] [Fig. 1] is a schematic representation of a supported part 10 capable of being anchored to a support by means of the anchoring device according to the present invention. In particular, [Fig. 1] represents the supported part 10 in a perspective view through one of its main faces, called the upper face 10a. The supported part 10 also comprises another main face, opposite the upper face 10a and called lower face 10b.

[0058] The supported part 10 also comprises at least one opening, called the anchoring opening 11. Said anchoring opening 11 passes in particular through the supported part 10 from the upper face 10a to the lower face 10b.

[0059] The anchoring opening 11 may be the combination of a circular opening 1 IC and rectangular openings 1 IL which each extend from the periphery of the circular opening 11C. For example, the rectangular openings 11L may be arranged at a regular angular spacing around the circular opening 11C, in particular, the anchoring opening 11 may comprise 4 rectangular openings 1 IL arranged at an angular spacing of 90° around the circular opening.

[0060] The supported part 10 may also comprise, on the upper face 10a, a circular rib 12 surrounding the anchoring opening 11. In particular, the circular rib 12 is arranged to circumscribe the anchoring opening 11. More particularly, the circular rib 12 and the circular opening 11C have their centers in common. Reinforcing ribs 13 may be arranged radially to the circular rib 11.

[0061] The area circumscribed by the circular rib 12, called the anchoring area 13, comprises a central area 13a and a peripheral area 13b, the central area 13a being set back from the peripheral area 13b. The central area 13a and the peripheral area 13b are also connected by a wall, called the anchoring wall 13c, which may be perpendicular or oblique to the areas 13a and 13b.

[0062] It is understood, without it being necessary to specify it, that the zones 13a and 13b are flat and essentially parallel to each other. Furthermore, the central zone 13a forms a disc while the peripheral zone 13b forms a ring.

[0063] As illustrated in [Fig.2], a clearance 14, through which the anchoring opening 11 opens, is formed on the lower face 10b of the carried part 10, said clearance 14 being delimited by a wall 14a.

[0064] [Fig. 3] is a schematic representation of a support 15 which comprises two main faces called, respectively, support face 15a and internal face 15b. It is understood that the two main faces are essentially flat and opposite one another. The support also comprises an opening, called support opening 16 passing through the support from its support face to its internal face. It is understood that the support opening 16 is preferably of circular shape.

[0065] The invention therefore relates to an attachment device intended to anchor the carried part 10, by its lower face 10b, on the support face 15a of the support 15. In particular, the anchoring of the carried part 10 on the support 15 comprises the matching of the anchoring opening 11 and the support opening 16. By “matching”, we hear an anchoring opening 11 in line with the support opening 16. In particular, the openings 11 and 16 are in correspondence when their respective centers are perpendicular to the support face 15a.

[0066] Thus, [Fig.4] shows a fastening device 100 according to a first embodiment of the present invention.

[0067] In particular, [Fig. 4] represents the attachment device 100 in a perspective and exploded view. The attachment device 100 comprises a mounting member 200 and a locking pin 300.

[0068] [Fig.5] shows in perspective view the mounting member 200 of [Fig.4],

[0069] The mounting member 200 comprises a head 201, provided with a first face 201a and a second face 201b parallel to each other.

[0070] The mounting member 200 also comprises a hollow cylindrical section 220, which extends, in a direction XX', from the second face 201b and ends in a conical section 240. The cylindrical section 220 defines in particular an access channel 250 opening out via the first face 201a.

[0071] The cylindrical section 220 is intended to be engaged, in order, in the anchoring opening 11 and in the support opening 16 in correspondence with the anchoring opening 11 considered with a view to anchoring the carried part 10 on the support face 15a.

[0072] As shown in [Fig.4] and [Fig.5], the head 201 may be circular in shape and comprise at least two flexible upper tabs 202. The at least two upper tabs 202 extend from the contour of the head 201 and are oriented so as to oppose by spring effect the contact between the second face and the upper face of the carried part when the cylindrical section is engaged in the anchoring opening. It is understood that in order to be able to exert a spring effect against the upper face, the at least two tabs 202 must be inclined relative to the first face in a direction going from the first face towards the second face.

[0073] [Fig. 6] illustrates schematically, and along a section plane perpendicular to the first face, the mounting member 200 engaged, by its conical section and in order, in the anchoring opening 11 and in the support opening 16. In this [Fig. 6], the at least two upper tabs 202 bear against the support face and consequently oppose contact between the second face and said support face. In particular, and to the extent that the anchoring wall 13c can be considered, the at least two upper tabs 202 can be arranged to cooperate with the anchoring wall 13c in order to allow the centering of the mounting member 200 relative to the openings 11 and 16, and more generally of the attachment device according to the present invention. In general, and according to the principles previously set out, the at least two tabs may be configured to allow centering of the mounting member relative to the anchoring opening, the centering implementing cooperation between the at least two tabs with a circular chamfer formed on the upper face and within which the anchoring opening is centered. It is understood that in the example illustrated in [Fig.6], the chamfer corresponds to the anchoring wall 13c.

[0074] Still in relation to [Fig.6], the mounting member 200 may comprise at least two lower tabs 203 which are flexible and which extend from the cylindrical section and which are configured to exert a force against the lower face when the cylindrical section is engaged in the anchoring opening 11.

[0075] It is understood that said lower tabs 203 extend radially to the cylindrical section.

[0076] It is understood that in order to be able to exert a spring effect against the lower face 10b, the at least two lower tabs 203 are inclined relative to the first face in a direction going from the second face towards the first face.

[0077] The lower tabs 203 make it possible to impose a pre-holding position of the mounting member 200 making the attachment device according to the present invention integral with the carried part 10.

[0078] Furthermore, the clearance 14 provides a housing in which the lower tabs 203 are housed when the part carried against the support face is anchored.

[0079] As illustrated in [Fig.7], each lower tab 203 comprises, from its origin towards its free end, a first section 203a and a second section 203b, said lower tab being configured to flex at the junction between the first section 203a and the second section 203b. This ability of the lower tabs 203 to flex makes it possible to consider an anchoring opening of a restricted extent. In particular, the lower tabs 203 can cooperate with the rectangular openings 1 IL, and flex at the junction between the first section 203a and the second section 203b. More particularly, upon engagement of the mounting member 200, a second section 203b abuts an edge of the rectangular opening, causing the lower tab to flex and thereby allowing full engagement of the mounting member 200.

[0080] The mounting member 200 may also comprise support tabs 204. In particular, each support tab may be associated with a lower tab 203. More particularly, each support tab 204 may comprise a common inlet with the lower tab 203 with which it is associated. In this regard, the support tab may be inclined in a direction going from the first face towards the second face. In other words, a support tab extends from divergent manner relative to the lower tab with which it is associated. In addition, each support tab is configured to bear against the support face when the cylindrical section is engaged in an anchoring opening and in a support opening. The clearance 14 also provides a housing in which the support tabs 204 are housed when the part carried against the support face is anchored.

[0081] The fixing device 100 further comprises two flexible clips 205. In particular, the two flexible clips 205, and according to this embodiment, the two flexible clips 205 are formed in the thickness of the cylindrical section 220, and comprise an external boss 205a configured to allow pre-snap-fastening of the cylindrical section when the latter is partially engaged in the support opening 16. In other words, the bosses are arranged to allow a snap-fastening in the support opening when the cylindrical section is engaged in the anchoring opening and the support opening.

[0082] The two flexible clips 205 are configured to deploy in a divergent manner relative to a direction going from the conical section towards the head as soon as they are subjected to a force.

[0083] [Fig.8] shows in perspective view the locking pin of the [Fig.4]. The locking pin 300 comprises a push button 301 and a rod 302. In particular, the rod 302 is intended to be engaged, in sliding connection, in the access channel 250 by the first face ([Fig.9]). It is understood that the invention is not limited to an engagement in sliding connection and a person skilled in the art may consider any other type of connection, and in particular a helical, rotary or quarter-turn connection.

[0084] In this regard, and according to this embodiment, the rod 302 comprises two lateral strips 304 configured to cooperate with slots 206 formed in the cylindrical section 202. The cooperation makes it possible in particular to maintain the locking pin and the mounting member in a delivery position. Said delivery position is a position for which the locking pin is maintained on the mounting member, and is only partially engaged in the access channel.

[0085] The locking pin 300 is also configured to, when the engagement of the rod in the access channel 250 is carried out beyond the delivery position, adopt a locking position. The locking position is in particular a position for which the rod exerts a force on the two flexible clips so as to deploy the latter in a divergent manner. It is further understood that the locking pin can adopt the locking position as soon as a pushing force is exerted against the push button in order to continue the engagement of the rod in the access channel beyond the delivery position.

[0086] The deployment of the flexible clips 205 makes it possible to position the free ends of said flexible clips in abutment against the internal face of the support as soon as the cylindrical section is engaged in an anchoring opening and in a support opening and the head in abutment against the upper face.

[0087] As soon as the cylindrical section 220 is engaged in the anchoring opening and in the support opening and the locking pin is in its locked position, the carried part is anchored on the support.

[0088] The head 201 comprises locking means configured to hold the locking pin in the locking position. For example, the locking means comprise stops, formed on the push button, and snap-fastening means 209 formed on the head 201.

[0089] The rod and the cylindrical section may be shaped to prevent any rotation of said rod when the latter is engaged in the cylindrical section. For example, the rod may include one or more flats along its entire length and the access channel may have a shape conforming to that of the rod ([Fig. 13]).

[0090] [Fig.10], [Fig.11], [Fig.12] illustrate the different stages of implementation of the attachment device for anchoring a carried part 10 on a support 15.

[0091] In particular, [Fig. 10] illustrates a pre-assembly step during which the attachment device, in its delivery position, is engaged in the anchoring opening 11. The upper tabs 202 and the lower tabs 203 bearing respectively against the upper face and the lower face, make it possible to tension said attachment device. Furthermore, the upper tabs make it possible to center the attachment device relative to the anchoring opening.

[0092] [Fig. 11] illustrates the pre-fixing of the part carried on the support. In particular, the conical section 240 makes it possible to compensate for an off-centering of the anchoring opening relative to the support opening. Once the off-centering is compensated for, the cylindrical section can be engaged in the support opening ([Fig. 12]). Following this engagement, the bosses 205a of the flexible clips 205 come into abutment against the internal face 15b.

[0093] Pushing the push button then allows the rod to be engaged in its locking position in order to complete the engagement of the cylindrical section in the support opening and thus position the free ends of the flexible clips in abutment against the internal face 15b. Furthermore, as soon as its locking position is reached, the locking pin is snapped into place with the head ([Fig. 13]).

[0094] The present invention also relates to a second embodiment which essentially incorporates the characteristics relating to the first embodiment.

[0095] However, this second embodiment differs from the first embodiment in that the flexible clips are carried by the rod while the cylindrical section includes two lateral openings 310 allowing the deployment of said flexible clips when the rod is in the locking position ([Fig. 14]).

[0096] Furthermore, and according to this embodiment, the delivery position and the locking position are the same. In other words, the flexible clips 205 are deployed, passing through the lateral openings 310 as soon as the rod is in the delivery position.

[0097] Furthermore, the side openings and the two flexible clips are configured so that when a pushing force is exerted on the push button in order to engage the rod beyond the locking position, said flexible clips retract internally to the cylindrical section.

[0098] Furthermore, the locking pin, and more particularly the push button 301, may comprise spring tabs 315 intended to bear against the first face in order to oppose a coming together of the push button and the head when the rod is engaged in the access channel.

[0099] The invention also relates to an assembly comprising a carried part and a support, said carried part being anchored, by one of its faces, called the lower face, on a face, called the support face of the support, the carried part comprising at least one opening, called the anchoring opening, and passing through said carried part from an upper face to the lower face opposite the upper face, said anchoring opening being intended to be placed in correspondence with an opening, called the support opening, passing through the support from its support face to a face, called the internal face and opposite the support face, the anchoring of the carried part on the support implementing at least one attachment device according to the present invention, said attachment device being engaged in the anchoring opening and in the support opening in correspondence with the anchoring opening.

[0100] Advantageously, the anchoring opening, of generally circular shape, also comprises lateral recesses.

[0101] Advantageously, the anchoring opening is circumscribed by a circular rib formed on the lower face.

[0102] Advantageously, the part carried is a deflector and the support is an automobile underbody.

[0103] Of course, the invention is not limited to the embodiments described and variant embodiments can be made without departing from the scope of the invention as defined by the claims.

Claims

Claims

1. Attachment device (100) intended to anchor a part, called the supported part (10), by one of its faces, called the lower face (10b), on a face, called the support face (15a) of a support (15), the supported part (10) comprising at least one opening, called the anchoring opening (11), and passing through said supported part (10) from an upper face (10a) to the lower face (10b) opposite the upper face (10a), said anchoring opening (11) being intended to be placed in correspondence with an opening, called the support opening (16), passing through the support (15) from its support face (15a) to a face, called the internal face (15b) and opposite the support face (15a), the attachment device (100) comprising: - a mounting member (200) which comprises a head (201), provided with a first face (201a) and a second face (201b) parallel to each other, the mounting member (200) also comprises a hollow cylindrical section (220), which extends, in a direction XX', from the second face (201b) and ends in a pointed section (240), said cylindrical section (220) defining an access channel (250) opening through the first face (201a), said cylindrical section (220) being intended to be engaged in an anchoring opening (11) and in a support opening (16) in correspondence with the anchoring opening (11) considered for the purpose of anchoring the carried part (10) on the support face (15a); - a locking pin (300), provided with a push button (301) and a rod (302), the rod (302) being intended to be engaged, advantageously in sliding connection, in the access channel (250) by the first face (201a); the fixing device further comprises at least one flexible clip (205), the at least one flexible clip (205) being configured to deploy in a divergent manner relative to a direction going from the pointed section (240) towards the head (201) as soon as the rod (302) engaged in the access channel (250) adopts a position called the locking position, the deployment of the at least one flexible clip (205), as soon as the cylindrical section (220) is engaged in an anchoring opening (11) and in a support opening (16) and the head (201) bearing against the upper face (10a), positioning the free end of said flexible clip (205) bearing against the internal face (15b) of the support.

2. The fastening device (100) of claim 1, wherein the head (201) is circular in shape and comprises at least one flexible upper tab (202), the at least one upper tab (202) extending from the contour of the head (201) and is oriented so as to oppose by spring effect the contact between the second face (201b) and the upper face (10a) of the carried part (10) when the cylindrical section (220) is engaged in the anchoring opening (11).

3. The fastening device (100) of claim 2, wherein the at least one tab is also configured to allow centering of the mounting member (200) relative to the anchoring opening (11), the centering implementing cooperation between the at least one tab with a circular chamfer formed on the upper face (10a) and within which the anchoring opening (11) is centered.

4. A fastening device (100) according to one of claims 1 to 3, wherein the mounting member (200) comprises at least one lower tab (203) which extends from the cylindrical section (220) and which is configured to exert a force against the lower face (10b) when the cylindrical section (220) is engaged in the anchoring opening (11).

5. Fastening device (100) according to claim 4, wherein the at least one lower tab (203) comprises, from its origin towards its free end, a first section (203a) and a second section (203b), said lower tab (203) being configured to flex at the junction between the first section (203a) and the second section (203b).

6. Fastening device (100) according to claim 4 or 5, wherein the at least one lower tab (203) is associated with a support tab (204) which extends divergently relative to the lower tab (203) with which it is associated, the support tab (204) being configured to bear against the support face (15a) when the cylindrical section (220) is engaged in an anchoring opening (11) and in a support opening (16).

7. Fastening device (100) according to one of claims 1 to 6, in which the at least one flexible clip (205) is formed in the thickness of the cylindrical section (220), and comprises an external boss (205a) configured to allow pre-snapping of the cylindrical section (220) when the latter is partially engaged in the support opening (16).

8. The fastening device (100) of claim 7, wherein the rod (302) is configured to exert a force on the at least one flexible clip (205) as soon as said rod (302) is in its locking position, the exerted force leading to the deployment of the at least one flexible clip (205).

9. Fastening device (100) according to claim 7 or 8, wherein the rod (302) comprises two lateral strips (304) configured to cooperate with slots (206) formed in the cylindrical section (220), said cooperation making it possible to maintain in a delivery position the locking pin (300) and the mounting member (200), said delivery position being a position for which the locking pin (300) is maintained on the mounting member (200), and from which, said locking pin (300) can adopt the locking position as soon as a pushing force is exerted against the push button (301) in order to continue the engagement of the rod (302) in the access channel (250).

10. Fastening device (100) according to one of claims 6 to 9, wherein the fastening device (100) also comprises latching means (209) configured to keep the push button (301) latched against the head (201) when the locking pin (300) is in the locking position.

11. Fastening device (100) according to one of claims 1 to 6, in which the at least one flexible clip (205) is carried by the rod (302), while the cylindrical section (220) comprises at least one lateral opening allowing the deployment of the at least one flexible clip (205) as soon as the rod (302) is in the locking position.

12. A fastening device (100) according to claim 11, wherein the at least one side opening and the at least one flexible clip (205) are configured so that when a pushing force is exerted on the push button (301) in order to engage the rod (302) beyond the locking position, said at least one flexible clip (205) retracts internally to the cylindrical section (220).

13. A fastening device (100) according to claim 11 or 12, wherein the head (201) comprises locking means configured to hold the locking pin (300) in the locking position.

14. A fastening device (100) according to claim 13, wherein the locking means comprises stops and snap-in means (209).

15. Fastening device (100) according to one of claims 1 to 15, in wherein the rod (302) and the cylindrical sections are shaped to prevent any rotation of said rod (302) when the latter is engaged in the cylindrical section (220).

16. Assembly comprising a carried part (10) and a support (15), said carried part (10) being anchored, by one of its faces, called the lower face (10b), on a face, called the support face (15a) of the support (15), the carried part (10) comprising at least one opening, called the anchoring opening (11), and passing through said carried part (10) from an upper face (10a) to the lower face (10b) opposite the upper face (10a), said anchoring opening (11) being intended to be placed in correspondence with an opening, called the support opening (16), passing through the support (15) from its support face (15a) to a face, called the internal face (15b) and opposite the support face (15a), the anchoring of the carried part (10) on the support (15) implementing at least one attachment device (100) according to one of the claims 1 to 15,said attachment device (100) being engaged in the anchoring opening (11) and in the support opening (16) in correspondence with the anchoring opening (H).,

17. An assembly according to claim 16, wherein the anchoring opening (11), of generally circular shape, also comprises lateral recesses.

18. An assembly according to claim 16 or 17, wherein the anchoring opening (11) is circumscribed by a circular rib (12) formed on the lower face (10b).

19. Assembly according to one of claims 16 to 18, in which the carried part (10) is a deflector and the support (15) is an automobile underbody.

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