Sound collection assembly

Abstract

A sound capture assembly (1) comprising: - a cover (2) having a first perforation (21); - a first microphone (M1). The assembly (1) includes: - a first elastically compressible part (11) having an internal passage; and - a first movable flange (B1) relative to the cover (2) between assembly and release positions with respect to the cover (2), - the capture assembly (1) adopting assembly and release configurations; - in the assembly configuration, the first flange (B1) compresses the first compressible part (11) and defines a first acoustic chamber (11a) between the first perforation (21) and the first microphone (M1) via the internal passage of the first compressible part; - in the release configuration, the first flange (B1) is in the release position allowing the first microphone (M1) to move away from the cover.

Description

[0001] The present invention relates to the field of sound capture assemblies. BACKGROUND OF THE INVENTION

[0002] It is known to capture sounds using microphones placed in a housing, the housing having the function of protecting these microphones.

[0003] Such a box may have a cover with through perforations to allow sound to pass through the cover.

[0004] Each microphone is usually attached to a microphone stand and is electrically connected to electrical conductors carried by the microphone stand to transmit electrical signals representative of sound waves picked up by the microphone.

[0005] Usually, the microphone mount is attached inside the housing so that the microphone is located opposite a corresponding opening that passes through the cover.

[0006] Such fixing of the microphone holder is done by gluing the holder against an internal part of the housing.

[0007] In case of microphone malfunction, it is necessary to detach the microphone holder, which is time-consuming and may cause damage to parts glued to the microphone holder.

[0008] Recycling such a sound capture box / assembly is therefore difficult to achieve.

[0009] Furthermore, the microphone holder gluing operation is difficult to implement and is difficult to reproduce since each glue bead is specific in terms of location, shape, thickness and gluing surface.

[0010] Thus, the sound pickup conditions of a given microphone differ depending on how the microphone support is glued. SUBJECT OF THE INVENTION

[0011] An object of the present invention is to provide a sound capture assembly resolving or mitigating all or part of the aforementioned drawbacks of the prior art. SUMMARY OF THE INVENTION

[0012] For this purpose, the invention relates to a sound capture assembly according to claim 1.

[0013] The capture assembly according to the invention selectively adopts an assembly configuration and a release configuration.

[0014] In the assembly configuration, the first flange is in its assembly position on the cover (in this case on the first fixing part which belongs to the cover) and it exerts a pushing force on the support of the first microphone so as to: on the one hand compress the first compressible part between this support and the cover; and on the other hand create the first acoustic chamber going from the cover to the support of the first microphone.

[0015] This first acoustic chamber opens only towards the first perforation of the cover and towards the first microphone to conduct, via the first acoustic chamber, sound waves passing through the first perforation of the cover to the first microphone.

[0016] Under the effect of its compression between the support of the first microphone and the cover, the first compressible part is deformed along a main axis of the first chamber and it forms an annular sealing joint defining at least in part the first acoustic chamber.

[0017] Sound waves arriving at the first perforation of the hood pass through the hood via the first perforation, then they are guided by the first chamber.

[0018] The waves arriving in the first chamber are thus guided towards the first microphone, through the first acoustic chamber, following the main axis of the first chamber which passes through the first perforation and through the first microphone.

[0019] By its compressible nature, the compressible part which delimits the periphery of the first acoustic chamber limits the passage of possible acoustic disturbances going from the outside to the inside of the first acoustic chamber following a direction transverse to the main axis of the first acoustic chamber.

[0020] In other words, in the assembly configuration the first flange compresses the first compressible part to define the first sealed acoustic chamber which opens on a first side of the first compressible part towards the first perforation of the cover and on a second side of the first compressible part opens towards the first microphone.

[0021] The acoustic seal between the first compressible part and the support of the first microphone is thus increased by the tightening of the compressible part under the effect of the first flange in the assembly position.

[0022] The ability to move the first flange from its assembly position to its release position allows the first microphone to be simply disassembled from the cover.

[0023] This simplifies the maintenance and dismantling / recycling operations of the sound capture assembly according to the invention.

[0024] The assembly according to the invention is particularly advantageous because the cover, the first microphone, the elastically compressible part can be replaced / dismantled independently of each other.

[0025] In summary, the sound capture assembly according to the invention allows: a very good mechanical connection between the support of the first microphone and the cover without having to glue the support of the first microphone against the cover; a reversibility of the mechanical connection between the cover and the microphone support to facilitate the disassembly of the first microphone from the cover (the first flange is arranged to move from its assembly position to its release position and vice versa); to create a first acoustic chamber which is correctly insulated over its entire periphery, which promotes sound transmission to the first microphone while limiting the risk of sound interference.

[0026] The sound capture assembly according to the invention also makes it possible to improve the quality of sound capture thanks to an acoustic chamber whose characteristics remain constant as long as the first flange is in its assembly position. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Other characteristics and advantages of the invention will emerge clearly from the description given below, for information purposes only and in no way limiting, with reference to the appended drawings, in which: [ Fig. 1a ] Figure 1a represents an exploded perspective view of a sound capture assembly 1 according to the invention before its assembly using OX tooling specifically adapted to a shape of the flange B1 of the capture assembly 1; [ Fig. 1b ] there figure 1b represents a perspective view of the entire figure 1a while preparing to force the movement of the first flange B1 from its release position to its assembly position using the OX tool so as to move the assembly according to the invention from its release configuration to its assembly configuration; [ Fig. 2 ] there figure 2 represents a bottom perspective view of the OX tooling illustrating the shape of the OX tooling which is complementary to a shape of the flange B1 so as to couple the OX tooling to the flange B1 to move it between its assembly and release positions, without risk of the OX tooling coming into contact against the first microphone M1 (the first microphone M1 being protected inside a through passage of the flange B1); [ Fig. 3 ] there figure 3 is a sectional view of the assembly 1 according to the invention while it is in the assembly configuration and is observed in a section plane AA (the orientation of the section plane AA is illustrated in the figure 1b ) ; [ Fig. 4a ] there figure 4a is a top view of the cover 2 of which one face is seen intended to be inside a housing closed by the cover, this cover having through perforations 21, 22 for the passage of sound through the cover and first and second fixing parts respectively arranged to position therein first and second microphones intended to receive sounds passing through the perforations 21 2 of the cover; [ Fig. 4b ] there figure 4b is a view similar to the figure 4a where we see the cover 2 on which we have positioned first and second microphones M1, M2 respectively carried by microphone supports Sp1, Sp2, these supports Sp1, Sp2 of the microphones M1, M2 being perforated to allow the passage of pins 23a, 23b belonging to the cover 2, these pins making it possible to precisely locate the microphones M1, M2 relative to the first and second perforations 21, 22 of the cover 2; [ Fig. 4c ] there figure 4c is a view similar to the figure 4b where we always see the hood 2, the microphones M1, M2 and the supports Sp1, Sp2 of the microphones M1, M2 as well as the first and second flanges B1, B2 in their release positions (the assembly 1 is here in the release configuration), the first flange B1 being arranged to clamp the support Sp1 of the first microphone M1 so as to fixedly position the first microphone M1 relative to the cover 2 and the second flange B2 being arranged to clamp the support Sp2 of the second microphone M2 so as to fixedly position the second microphone M2 relative to the cover 2; [ Fig. 4d ] there figure 4d is a view similar to the figure 4c where we see the sound capture assembly 1 according to the invention placed in the assembly configuration (The sound capture assembly 1 passes from its visible release configuration to the figures 4c to its assembly configuration visible at the figure 4d by pivoting, using the OX tool, each given flange B1, B2, from its release position to its assembly position). DETAILED DESCRIPTION OF THE INVENTION

[0028] As illustrated on the figures 1a , 1b and 1c, the invention relates to a sound capture assembly 1.

[0029] The sound capture assembly 1 according to the invention comprises: a cover 2 provided with a first cover zone Z1 having at least a first perforation 21 passing through the cover 2) a first microphone M1 fixed on a support Sp1 of the first microphone, the first microphone M1 being electrically connected to electrical conductors Cd carried by the support Sp1 to transmit electrical signals representative of sound waves picked up by the first microphone.

[0030] The first microphone M1 is fixed / carried by the support Sp1 of microphone M1 and it is arranged to transmit, via the electrical conductors Cd, the electrical signals representative of the sound waves passing through the first perforation 21 and picked up by the first microphone M1.

[0031] Capture set 1 includes: a first elastically compressible part 11 having an internal passage opening on either side of the elastically compressible part 11; and a first movable flange B1 relative to the cover 2 between a position of assembly of the first flange B1 on a first fixing part belonging to the cover 2 and a position of release of the first flange B1 with respect to the cover 2.

[0032] The capture assembly 1 is arranged to selectively adopt an assembly configuration visible to the figures 3 And 4d and a visible release configuration at figures 1b And 4c.

[0033] In the assembly configuration, the first flange B1 is in the assembly position, resting on the support Sp1 of the first microphone M1 for: compress the first compressible part between the support Sp1 of the first microphone M1 and the cover 2; and to define a first acoustic chamber 11a extending from the first perforation 21 of the cover 2 to the first microphone M1 via the internal passage of the first compressible part.

[0034] In the release configuration, the first flange B1 is in the release position of the first flange B1 with respect to the cover 2, then allowing the support Sp1 of the first microphone M1 to move away from the cover.

[0035] The first microphone M1 comprises a face sensitive to acoustic waves which is oriented directly towards the first acoustic chamber 11a which is at least partially formed in the first compressible part 11 and towards which the first perforation 21 of the cover opens. 2.

[0036] In this way, the sound capture carried out by the first microphone M1 essentially consists of capturing the sounds passing through the first perforation 21 of the cover 2, the other sounds being attenuated by the elastically compressible material of the first compressible part.

[0037] Thanks to the invention, as the first flange B1 and the cover 2 have complementary shapes allowing a reversible mechanical assembly, the space between the first flange B1 and the cover 2 is perfectly delimited and invariant even after several disassembly / reassembly of the first flange B1 on the cover. 2.

[0038] In this way, the degree of compression / deformation of the first compressible part 11 is predetermined and is perfectly reproducible each time the first flange B1 is assembled on the cover 2 to compress the first compressible part 11.

[0039] Thanks to the invention, the acoustic characteristics of the first acoustic chamber 11a and the positioning characteristics of the first microphone M1 with respect to the first acoustic chamber 11a and with respect to the first perforation 21 of the cover 2 are constant and perfectly reproduced.

[0040] The invention therefore offers a solution making it possible to replace the cover 2, or the first flange or the first compressible part, or the first microphone M1 with an identical part while guaranteeing that the same predetermined set of sound pickup characteristics will always be obtained by the sound pickup assembly 1 of the invention.

[0041] As can be seen on the figures 4c et 4d , the sound capture assembly according to the invention may comprise several microphones, in this case said first microphone M1 and a second microphone M2, the second microphone M2 being positioned / fixed on the cover 2 in the same way as the first microphone M1.

[0042] To simplify the figures 1a , 1b et 3 , only the first area of ​​the cover Z1 opposite which the first microphone M1 is positioned is shown.

[0043] However, as is understood from figures 4a à 4d , the cover 2 is also provided with a second zone Z2 of the cover 2 distinct from said first zone Z1 of the cover, this second zone Z2 having at least one second perforation 22 passing through the cover 2.

[0044] The second microphone M2 is fixed on a support Sp2 of the second microphone M2, the second microphone M2 being electrically connected to electrical conductors Cd carried by the support Sp2 of the second microphone M2 to transmit electrical signals representative of sound waves picked up by the second microphone M2.

[0045] Capture set 1 includes: a second elastically compressible part having an internal passage opening on either side of the second elastically compressible part; and a second flange B2 movable relative to the cover 2 between a position for assembling the second flange B2 on a second fixing part belonging to the cover 2 and a position for releasing the second flange with respect to the cover 2.

[0046] In the assembly configuration of the assembly 1, the second flange B2 is in the assembly position, resting on the support Sp2 of the second microphone M2 to compress the second compressible part between the support Sp2 of the second microphone and the cover 2 and to define a second acoustic chamber extending from the second perforation 22 of the cover 2 to the second microphone M2 via the internal passage of the second compressible part.

[0047] In the release configuration, the second flange B2 is in the release position of the second flange B2 with respect to the cover 2, then allowing the support Sp2 of the second microphone M2 to move away from the cover.

[0048] The aforementioned advantages of the invention in relation to the assembly of the first microphone M1 with respect to the first perforation 21 made at the level of the first zone Z1 of the cover 2 using the flange B1 are transposable mutatis mutandis to the assembly of the second microphone M2 with respect to the second perforation 22 made at the level of the second zone Z2 of the cover 2 using the second flange B2 and the second elastically compressible part.

[0049] In this case, the second zone Z2 of hood 2 has shapes essentially identical to the shapes of the first zone Z1.

[0050] The Sp2 holder of the second microphone M2 has shapes identical to the majority of the shapes of the Sp1 holder of the first microphone M1.

[0051] The first and second microphones M1, M2 have respective volume dimensions that are substantially equivalent so that each microphone can penetrate a through-passage of one or other of the flanges B1, B2 when they are assembled with the cover.

[0052] The first and second microphones M1, M2 can be electronically identical to each other to have identical sensitivities but they could also be different to pick up sounds on distinct sound ranges.

[0053] The electrical conductors Cd carried by the supports Sp1, Sp2 of the first and second microphones M1, M2 extend here on the same flexible sheet N.

[0054] As illustrated in the figure 1a , the flexible ribbon cable N here has one end connected to a ribbon cable connector Nc to distribute the signals transmitted by the conductors Cd to external electronic components. To simplify the figures, the external electronic components to which the ribbon cable connector Nc must be connected are not shown.

[0055] The first and second flanges B1, B2 are identical to each other so that the second flange B2 can be assembled on the cover 2 in place of the first flange and the first flange B1 can be assembled on the cover 2 in place of the second flange B2.

[0056] The first and second deformable parts are also identical to each other so that they are interchangeable with each other.

[0057] Thus, the second flange B2 can be assembled on the cover 2 in place of the first flange B1 and conversely, the first flange B1 can be assembled on the cover 2 in place of the second flange B2.

[0058] With this embodiment of the invention, as the flanges B1, B2, the elastically deformable parts and the shapes of the first and second zones Z1, Z2 of the cover are identical to each other, the shapes and the acoustic characteristics of the acoustic chambers respectively formed in the first and second elastically deformable parts 11 are identical to each other.

[0059] The invention thus makes it possible to generate, in a perfectly reproducible manner, acoustic chambers which are essentially identical to each other with the capacity to replace the constituent parts of the assembly according to the invention.

[0060] This is particularly useful in terms of ease of assembly / disassembly of the assembly according to the invention.

[0061] This eliminates the need to glue the microphones to the cover, thus eliminating the need for a glue curing step or bonding verification.

[0062] The assembly of the microphones with respect to the cover is easily reversible by simply moving the flanges.

[0063] Thus, the assembly 1 according to the invention is easily maintainable / repairable / reconfigurable and recyclable.

[0064] We will now describe in more detail the assembly of the first microphone at the level of the first zone Z1, this description being transposable mutatis mutandis to the assembly of the second microphone at the level of the second zone Z2.

[0065] The first compressible part 11 is preferably made of a foam that is compressible in an axial direction of the internal passage and in a radial direction of the first internal passage.

[0066] The deformation along the axial direction of the first compressible part 11 makes it possible to eliminate the risk of vibrations between the cover 2 and the compressible part 11 and between the compressible part 11 and the support Sp1 of the first microphone M1.

[0067] The deformation in the radial direction increases the diameter of the first compressible part 11, the positioning stability of the support Sp1 against the cover 2 thus being improved.

[0068] Furthermore, the increase in the diameter of the first compressible part 11 is also favorable to the absorption of parasitic sound waves moving in the radial direction from the outside of the first compressible part towards the first acoustic chamber 11a.

[0069] In this way, the pickup assembly 1 limits the risk of sound interference from the waves picked up by the first microphone M1.

[0070] Preferably, as we understand from the figures 1a And 3 , the support Sp1 of the first microphone M1 comprises a stiffening plate Sp10 and a flexible sheet N secured to the plate Sp10, the electrical conductors Cd carried by the support Sp1 of the first microphone M1 extending at least partly along the flexible sheet N.

[0071] In this case, the first microphone M1 is glued to the flexible sheet N of the support Sp1 of the first microphone M1, and electrical connections of the first microphone M1 are respectively soldered to one of said corresponding electrical conductors Cd which extends along the flexible sheet N.

[0072] The stiffening plate Sp10 is perforated opposite the first microphone M1 so that the perforation of the plate Sp10 constitutes a portion of the first acoustic chamber 11a extending between the first microphone M1 and the cover 2.

[0073] In this way, the stiffening plate Sp10 provides rigidity around the entire periphery of the first acoustic chamber 11a at an interface between the first acoustic chamber 11a and the support Sp1 of the first microphone M1.

[0074] This rigidity limits the risk of deterioration of the mechanical junction between the first microphone M1 and the support Sp1 of the first microphone M1.

[0075] This localized stiffening is also favorable to the longevity of these electrical connections with the microphone.

[0076] Always to preserve the microphone, as illustrated in the figure 3 , a dust protection grid G1 is arranged between the sensitive face of the microphone M1 and the first perforation 21. This grid G1 can be glued against the sheet N, opposite a perforation of the sheet opening towards the first microphone M1.

[0077] To save space, this G1 grid is preferably placed in the perforation of the Sp10 stiffening plate which is opposite the first microphone M1.

[0078] To improve the connection between the G1 grid and the Sp1 support of the M1 microphone, this grid can be glued to a R1 washer whose edges are secured to the Sp10 stiffening plate.

[0079] Since the first microphone M1 is precisely arranged opposite the first perforation 21 of the cover 2, the sound waves passing through the first perforation 21 of the cover 2 are directly directed towards the first microphone M1 via the first acoustic chamber 11a passing through the grid G1.

[0080] The first acoustic chamber 11a allows sound amplification because it has a precisely defined internal volume and because it opens exclusively on a first side towards the first perforation 21 of the cover 2 and on a second opposite side towards the first microphone M1.

[0081] As we understand from figures 1a , 3 And 4a , the first zone Z1 of cover 2 comprises an annular rib 23 which surrounds the first perforation 21 of the cover and the first compressible part 11 bears against this annular rib 23.

[0082] In this way, the first compressible part 11 which is made of an elastically deformable material, in this case a foam, comes to deform elastically against the annular rib 23.

[0083] The contact surface between the cover 2 and the first compressible part 11 is thus increased all around the first perforation 21, which is favorable to the sound seal between the cover 2 and the first elastically deformable part.

[0084] As illustrated on the figures 1a , 4a à 4d , the first zone Z1 of the cover 2 also comprises pins 23a, 23b for positioning the support Sp1 of the first microphone M1 which each pass through a corresponding perforation formed in the support Sp1 of the first microphone M1.

[0085] These pins prohibit movements of the support Sp1 in directions parallel to a main plane Pn of the cover 2.

[0086] Here, the first zone Z1 of the cover 2 carries two positioning pins 23a, 23b which are fixed on the cover 2.

[0087] Each of these pins 23a, 23b penetrates into a corresponding (circular) perforation of the support Sp1 of the first microphone M1, the perforation passing through the stiffening plate Sp10 and the sheet N.

[0088] These pins 23a, 23b also serve as a key when mounting the support Sp1 of the first microphone on / against the cover 2 and allow the first microphone M1 to be precisely located opposite the first perforation of the cover 2.

[0089] Preferably, these pins are placed on either side of the first perforation with an alignment between these pins which is offset relative to a longitudinal axis of the sheet N.

[0090] The first flange B1 has circular arc openings B1a, B1b arranged so that each positioning pin 23a, 23b enters one of the circular arc openings B1a, B1b which corresponds to it on the first flange B1.

[0091] Each given arcuate opening B1a, B1b of the first flange B1 is shaped to allow the movement of the first flange B1 between its assembly and release positions while at least one of said positioning pins is located in the given arcuate opening B1a, B1b.

[0092] In this way, the pins also have a guide function to translate the flange B1 by bringing it closer to the cover and a rotation stop function to define: a stop position in orientation of the flange B1 which is unique when the flange B1 is in the release position (see the figure 4c ); and a stop position in orientation of the flange B1 which is unique when the flange B1 is in the assembly position (see the figure 4d ).

[0093] The first flange B1 has a bearing surface against the support Sp1 of the first microphone M1 which extends on either side of each of the circular arc-shaped openings B1a, B1b of the first flange B1.

[0094] Thus, when the first flange B1 is brought towards the cover 2 to assemble it on the cover, each circular arc opening B1a, B1b constitutes a window for positioning and inserting a positioning pin 23a, 23b.

[0095] In this sense, the circular arc opening B1a is an aid to mounting the first flange B1 on the hood.

[0096] Furthermore, as the bearing surface against the support Sp1 of the first microphone M1 extends on either side of each of the circular arc-shaped openings B1a, B1b of the first flange B1, the support between the first flange B1 and the support Sp1 of the first microphone M1 is made on either side of each of the pins 23a, 23b.

[0097] These characteristics of the first flange B1 and the positioning pins make it possible to improve the strength and positioning precision of the first microphone M1 relative to the cover 2.

[0098] The arcuate shapes of the windows allow the flange to pivot between the release and assembly positions while pins 23a, 23b are located in the windows.

[0099] Preferably, the windows B1a, B1b have widths such that when the flange B1 rotates with respect to the cover 2, the pins rub against the edges of the windows to thus guide the rotation of the flange.

[0100] The first fixing part which belongs to the cover 2 comprises first and second tabs 24a, 24b placed on either side of the first perforation 21.

[0101] The first flange B1 comprises complementary shapes of the first tab 24a and complementary shapes of the second tab 24b arranged so that in the assembly configuration, the first flange B1 is in axial support against some of the complementary shapes of the first tab 24a and against some of the complementary shapes of the second tab 24b to maintain the first flange B1 in its assembly position by opposing any separation of the first flange B1 relative to the cover 2 in a first direction D1 which is perpendicular to a main plane of extension of the first zone Z1 of the cover 2.

[0102] Here, the main extension plane of the first zone Z1 of cover 2 and the main plane Pn of cover 2 are merged but they could be parallel to each other.

[0103] As will be seen later, the tabs 24a and 24b are in the form of hooks against which arms of the flange B1 in the assembly position come to bear, thus preventing said spacing of the first flange B1 relative to the cover 2 in a first direction D1.

[0104] In the case where the first and second legs 24a, 4b are respectively hook-shaped: the shapes of the first flange B1 which are complementary to the first leg 24a comprise a first arm B11; and the shapes of the first flange B1 which are complementary to the second leg 24b comprise a second arm B12.

[0105] The first and second arms B11, B12 extend on either side of the first flange B1 so that each of said arms B11, B12 of the first flange B1 can engage with one of the hooks when the capture assembly 1 is in the assembled configuration.

[0106] The shapes of the first flange B1 which are complementary to the second leg 24a are in volume identical to the shapes of the first flange B1 which are complementary to the first leg 24a.

[0107] In this way the first flange can adopt two release positions and two assembly positions on the first fixing part.

[0108] This simplifies the assembly of the first flange B1 on the cover 2 since there are two distinct positions of the first flange B1 relative to the cover 2 from which one can move from the release configuration to the assembly configuration.

[0109] These two distinct positions are obtained by pivoting the first flange B1 180° around its central axis of symmetry.

[0110] Additionally, the first and second legs 24a, 24b are spaced apart from each other by a distance that is less than the width of the first flange measured between terminal ends of the first and second arms B11, B12 of the first flange B1.

[0111] In this way the first and second arms B11, B12 serve: on the one hand, a contact surface with the first and second legs 24a, 24b to exert, via the first and second arms B11, B12, an axial thrust of the first and second legs 24a, 24b on the first flange B1 in order to compress said first elastically deformable part; and on the other hand, radial stops to limit the pivoting capacity of the first flange relative to the cover 2 to the only pivoting angle necessary for moving the first flange B1 between its release and assembly positions.

[0112] Each of the first and second arms B11, B12 of the first flange B1 has an entry chamfer Cx.

[0113] The entry chamfers Cx are each arranged to rub against one of the first or second tabs 24a, 24b while forcing a movement of the first flange B1 towards a face of the cover 2 during the passage of the first flange B1 from its release position to its assembly position.

[0114] As we understand from figures 1a And 1b , the first leg 24a comprises a lug 24a1 and the second leg (24b) comprises a lug 24b1.

[0115] At least one of said lugs 24a1, 24b1 comprises a chamfer oriented towards the cover 2, said at least one chamfer being arranged so that when the first flange B1 is moved, by rotation relative to the cover 2, from its release position to its assembly position, the chamfer of the lug 24a1, 24b1 bears against a portion of one of said arms B11, B12 of the first flange B1 to bring the first flange B1 closer to a flat surface of the cover 2.

[0116] The flat surface of the hood belongs to said internal face of the hood 2.

[0117] Preferably, it is possible to ensure that the first zone Z1 of the cover 2 comprises surfaces for guiding the movement of the first flange B1 relative to the cover 2 during its movement from the release position to the assembly position and during its movement from the assembly position to the release position.

[0118] As we understand from the figure 1b , these guide surfaces are such that the passage of the first flange B1 from its release position to its assembly position takes place along an assembly trajectory comprising: a first part of the trajectory consisting of a translation of the first flange B1 along the first direction D1 with the first flange B1 moving closer to the cover 2; followed by a second part of the trajectory combining translation of the first flange B1 along the first direction D1 and rotation of the first flange B1 around the first direction D1, in a first direction of rotation S1; followed by a third part of the trajectory comprising at least one rotation of the first flange B1 around the first direction D1 along said first direction of rotation (S1).

[0119] The first and second parts of the trajectory make it possible to simply bring the first flange B1 closer to the cover 2 to gradually crush / compress the first compressible part against the cover 2 and constitute the acoustic chamber 11a.

[0120] The third part of the trajectory allows, by pivoting the first flange B1, to lock the first flange B1 in its assembly position and thus maintain the pickup assembly 1 in its assembly configuration where each microphone is precisely positioned with respect to the cover.

[0121] The trajectory d'assemblage comprises a fourth part of trajectory following the third part of trajectory and in which the first flange B1 is spaced from the cover 2 until it comes into axial abutment against axial stops Rx respectively formed on the first and second legs 24a, 24b, said axial stops Rx each being adjacent to a rotational stop Rz.

[0122] As seen on the figure 1a , each rotation stop Rz is arranged to oppose any rotation of the first flange B1 in a second direction of rotation opposite to said first direction of rotation S1 as long as the first flange B1 is in axial abutment against said axial stops Rx.

[0123] The guide surfaces and the first flange B1 are arranged in such a way that the passage of the first flange B1 from the assembly position to the release position is carried out by following a disassembly trajectory which is the reverse of said assembly trajectory.

[0124] The first flange B1 includes: a central through passage B1x extending through the first flange to receive the first microphone M1 in the passage B1x while having a free space between the first microphone M1 and the first flange; an upper planar surface Ssup extending in an upper plane; a lower planar surface Sinf extending in a lower plane; the first flange B1 being arranged so that in the assembly configuration, the first microphone M1 is exclusively placed between the upper plane and the lower plane.

[0125] In this way the microphone is mechanically preserved in the flange.

[0126] As understood from Figures 1a3 and 4c, the central through-passage B1x extends lengthwise along a longitudinal axis of the through-passage, the first flange B1 comprising at least one pair of orientation surfaces Sn1, Sn2 of the first flange B1 around said longitudinal axis of the through-passage B1x.

[0127] In this case, these surfaces of orientations Sn1, Sn2 are arranged on either side of the passage B1x and are defined in recesses formed in the flange B1 which open axially towards the upper plane in which s'étend the upper surface Ssup and radially inwards of the central through passage B1x.

[0128] Finally, the invention relates to an OX tool for controlling the passage of said sound capture assembly 1 from one of the release or assembly configurations to the other of the release or assembly configurations.

[0129] The OX tool, illustrated on the figure 1a , 1b , 2 And 4c is shaped to simultaneously support: against said upper flat surface Ssup of the first flange; and against said pair of orientation surfaces Sn1, Sn2 of the first flange while remaining away from an area of ​​the central through passage B1x where the first microphone M1 is located when said sound pickup assembly 1 is in the assembly configuration.

[0130] Thus, the tool OX is shaped to mechanically engage against the first flange B1, by being in axial support against said upper flat surface Ssup and in radial support against said pair of orientation surfaces Sn1, Sn2.

[0131] This makes it possible to exert an orientation torque on the first flange B1 relative to the cover 2 around the first direction D1 (the first direction D1 is perpendicular to the main plane Pn of the cover 2), this torque making it possible to move the first flange between its release and assembly positions.

[0132] This OX tool is particularly easy to use because when it is mechanically engaged with the first flange B1, it is necessarily at a distance from the first microphone M1 which is located in the through passage B1x of the first flange.

[0133] The first microphone M1 is thus protected in the passage of the first flange, without any risk of contact between the tooling and the first microphone.

[0134] The tooling thus simplifies the assembly and disassembly of the first flange with respect to the cover 2 while protecting the microphone M1 against the risk of accidental contact likely to damage it.

[0135] In other words, the shape of the OX tooling is such that when it is mechanically engaged with the first flange to control movement between its release and assembly positions, the tooling is necessarily at a distance from the first microphone M1.

[0136] To this end, the OX tooling includes: an annular axial bearing surface O2 for coming to bear against the upper flat surface Ssup of the first flange B1; and lugs 031, O32 defining radial surfaces of the tool OX for coming respectively to bear against the orientation surfaces Sn1, Sn2 of the first flange B1.

[0137] The tooling here is a manual tooling which comprises two diametrically opposed arms 041, O42 to exert a torque for orienting the tooling around a longitudinal axis DOX of the tooling OX to cause the rotation of the first flange relative to the cover 2 (this rotation of the first flange is carried out around the axial direction of the internal passage of the first flange which is parallel and coincident with the central axis of symmetry of the first flange.

[0138] However, thanks to the specific features of the assembly according to the invention, the operations of fixing the microphones relative to the cover are very simple to carry out / to reproduce and it is thus possible to show microphones and flanges on the cover using a robotic arm.

[0139] The passage B1x in which the microphone M1 is located also makes it possible to promote sound capture by the first microphone M1, since the sounds arriving at the first microphone M1 without passing through the first acoustic chamber 11a are attenuated by the presence of the flange around the microphone.

[0140] This feature is favorable to an improvement in the quality of sound capture by the first M1 microphone.

[0141] The capture assembly 1 is preferably an acoustic speaker box or a communication box, the assembly comprising at least one communication card with a network external to the capture assembly 1 to broadcast a signal representative of the sound waves captured by the first microphone M1.

[0142] The cover of assembly 1 is a cover for closing an opening in the housing.

[0143] In any of the embodiments where the sound pickup assembly 1 is an acoustic speaker box or a communication box or a communication box incorporating an acoustic speaker, such a box also contains electronic components for processing the electrical signals produced by the microphone(s) and for broadcasting these signals.

Claims

1. Sound capturing unit (1), comprising: - a cover (2) provided with a first cover zone (Z1) having at least one first perforation (21) passing through the cover (2); - a first microphone (M1) fastened onto a support (Sp1) of the first microphone, the first microphone (M1) being electrically connected to electrical conductors (Cd) carried by the support (Sp1) to transmit electrical signals representative of sound waves captured by the first microphone, - a first elastically compressible part (11) having an internal passage opening onto either side of the elastically compressible part (11), characterised in that the capturing unit (1) comprises: - a first flange (B1) which is movable with respect to the cover (2) between a position of assembling the first flange (B1) on a first fastening part belonging to the cover (2) and a position of releasing the first flange (B1) from the cover 2, - the capturing unit (1) being arranged to selectively adopt an assembly configuration and a release configuration; - in the assembly configuration, the first flange (B1) is located in the assembly position, bearing on the support (Sp1) of the first microphone (M1) to compress the first compressible part between the support (Sp1) of the first microphone and the cover (2), and to define a first acoustic chamber (11a) extending from the first perforation (21) of the cover (2) to the first microphone (M1), by passing through the internal passage of the first compressible part; in the release configuration, the first flange (B1) is located in the release position of the first flange (B1) from the cover (2), thus enabling the spacing of the support (Sp1) of the first microphone (M1) with respect to the cover, the first fastening part belonging to the cover (2) comprising first and second tabs (24a, 24b) placed on either side of the first perforation, the first flange (B1) comprising complementary shapes of the first tab (24a) and complementary shapes of the second tab (24b) disposed such that in the assembly configuration, the first flange (B1) axially bears against some of the complementary shapes of the first tab (24a) and against some of the complementary shapes of the second tab (24b) to hold the first flange (B1) in its assembly position by being opposed to any spacing of the first flange (B1) with respect to the cover (2) in a first direction (D1), which is perpendicular to a main extension plane of the first zone (Z1) of the cover.

2. Sound capturing unit (1) according to claim 1, wherein the first compressible part (11) consists of a compressible foam in an axial direction of the internal passage and in a radial direction of the first internal passage.

3. Sound capturing unit (1) according to any one of claims 1 or 2, wherein the support (Sp1) of the first microphone (M1) comprises a rigidifying plate (Sp10) and a flexible layer (N) secured to the rigidifying plate (Sp10), the electrical conductors (Cd) carried by the support (Sp1) of the first microphone (M1) extending at least partially along the flexible layer (N).

4. Sound capturing unit (1) according to claim 3, wherein the rigidifying plate (Sp10) is perforated in front of the first microphone (M1) such that the perforation of the plate (Sp10) constitutes a portion of the first acoustic chamber (11a) extending between the first microphone (M1) and the cover (2).

5. Sound capturing unit (1) according to any one of claims 1 to 4, wherein the first microphone (M1) is disposed opposite to the first perforation (21) of the cover (2).

6. Capturing unit (1) according to any one of claims 1 to 5, wherein said first zone (Z1) of the cover (2) comprises an annular rib (23) which surrounds the first perforation (21) of the cover, the first compressible part (11) bearing against the annular rib (23) of the first zone (Z1) of the cover (2).

7. Capturing unit (1) according to any one of claims 1 to 6, wherein the first zone (Z1) of the cover (2) comprises pins (23a, 23b) for positioning the support (Sp1) of the first microphone (M1) each passing through a corresponding perforation formed in the support (Sp1) of the first microphone (M1) to prohibit movements of the support (Sp1) of the first microphone (M1) in directions parallel to a main plane (Pn) of the cover (2).

8. Capturing unit (1) according to claim 7, wherein the first flange (B1) comprises circular arc-shaped openings (Bla, B1b) disposed such that each positioning pin penetrates in one of the circular arc-shaped openings (Bla, B1b) which corresponds to it on the first flange (B1), each given circular arc-shaped opening (Bla, B1b) of the first flange (B1) being shaped to enable the movement of the first flange (B1) between its assembly and release positions while at least one of said positioning pins is located in the given circular arc-shaped opening (Bla, B1b), the first flange (B1) comprising a surface for bearing against the support (Sp1) of the first microphone (M1) which extends on either side of each of the circular arc-shaped openings (Bla, B1b) of the first flange (B1).

9. Capturing unit (1) according to any one of claims 1 to 8, wherein the first zone (Z1) of the cover (2) comprises surfaces for guiding the movement of the first flange (B1) with respect to the cover (2) during its movement from the release position to the assembly position and during its movement from the assembly position to the release position, these guiding surfaces being such that the passage of the first flange (B1) from its release position to its assembly position is done along an assembly trajectory, comprising: - a first trajectory part consisting of a translation of the first flange (B1) in the first direction (D1) with the first flange (B1) moving closer from the cover (2); followed by - a second trajectory part combining translation of the first flange (B1) in the first direction (D1) and rotation of the first flange (B1) about the first direction (D1), in a first direction of rotation (S1); followed by - a third trajectory part comprising at least one rotation of the first flange (B1) about the first direction (D1) in said first direction of rotation (S1).

10. Capturing unit (1) according to claim 9, wherein said assembly trajectory comprises a fourth consecutive trajectory part of the third trajectory part and wherein the first flange (B1) is spaced apart from the cover (2) until axially abutting against axial stops respectively formed on the first and second tabs (24a, 24b), said axial stops each being adjacent from a rotation abutment (Rz), each rotation abutment (Rz) is disposed to oppose any rotation of the first flange (B1) in a second direction of rotation opposite said first direction of rotation as the first flange (B1) is axially abutted against said axial stops (Rx).

11. Capturing unit (1) according to any one of claims 1 to 10, wherein: - the first and second tabs (24a, 24b) are respectively hook-shaped; - the shapes of the first tab (B1) which are complementary of the first tab (24a) comprise a first arm (B11); and - the shapes of the first flange (B1) which are complementary of the second tab (24b) comprise a second arm (B12), the first and second arms (B11, B12) extending on either side of the first flange (B1), such that each of said arms (B11, B12) of the first flange (B1) can engage with one of the hooks when the capturing unit (1) is in the assembled configuration.

12. Capturing unit (1) according to claim 11, wherein each of the first and second arms (B11, B12) of the first flange (B1) comprises an inlet chamfer (Cx), the inlet chamfers Cx each being disposed to rub against one of the first or second tabs (24a, 24b) while forcing a movement of the first flange (B1) to a face of the cover (2) during the passage of the first flange (B1) from its release position to its assembly position.

13. Capturing unit (1) according to any one of claims 1 to 12, wherein the first tab (24a) comprises a lug (24a1) and the second tab (24b) comprises a lug (24b1), at least one of said lugs (24a1, 24b1) comprising a chamfer oriented in the direction of the cover (2), said at least one chamfer is arranged such that when the first flange (B1) is moved, by rotation with respect to the cover (2), from its release position to its assembly position, the chamfer of the lug bears against a portion of one of said arms (B11, B12) of the first flange (B1) to move the first flange (B1) closer with respect to a flat surface of the cover.

14. Sound capturing unit (1) according to any one of claims 1 to 13, wherein: - the cover (2) is provided with a second zone (Z2) of the cover (2) distinct from said first zone (Z1) of the cover and having at least one second perforation (22) passing through the cover (2); - a second microphone (M2) fastened onto a support (Sp2) of the second microphone (M2), the second microphone (M2) being electrically connected to electrical conductors (Cd) carried by the support (Sp2) of the second microphone (M2) to transmit electrical signals representative of sound waves captured by the second microphone (M2), the capturing unit (1) comprising: - a second elastically compressible part having an internal passage opening onto either side of the second elastically compressible part; and - a second flange (B2) which is movable with respect to the cover (2) between a position of assembling the second flange (B2) on a second fastening part belonging to the cover (2) and a position of releasing the second flange from the cover (2), - in the assembly configuration, the second flange (B2) is located in the assembly position, bearing on the support (Sp2) of the second microphone (M2) to compress the second compressible part between the support (Sp2) of the second microphone and the cover (2), and to define a second acoustic chamber extending from the second perforation (22) of the cover (2) to the second microphone (M2), by passing through the internal passage of the second compressible part; - in the release configuration, the second flange (B2) is located in the release position of the second flange (B2) with respect to the cover (2) thus enabling the spacing of the support (Sp2) of the second microphone (M2) with respect to the cover.

15. Sound capturing unit (1) according to any one of claims 1 to 14, wherein the capturing unit (1) is a speaker casing or a communication casing, the unit (1) comprising at least one communication board with a network which is external to the capturing unit (1) to broadcast a signal representative of the sound waves captured by the first microphone (M1), said cover being a cover for blocking an opening of the casing.

16. Sound capturing unit (1) according to any one of claims 1 to 15, wherein the first flange comprises: - a central through passage (B1x) extending through the first flange to receive the first microphone (M1) in the passage, while having a free space between the first microphone (M1) and the first flange; - an upper flat surface (Ssup) extending into an upper plane; - a lower flat surface (Sinf) extending into a lower plane; the first flange being arranged such that in the assembly configuration, the first microphone (M1) is located exclusively placed between the upper plane and the lower plane.

17. Sound capturing unit (1) according to claim 16, wherein said central through passage (B1x) extends in length about a longitudinal axis of the through passage, the first flange (B1) comprising at least one pair of orientation surfaces (Sn1, Sn2) of the first flange (B1) about said longitudinal axis of the through passage (B1x).

18. Kit comprising a capturing unit according to claim 17 and a tool (OX) to control the passage of said sound capturing unit (1) according to claim 17 from one of the release or assembly configurations to the other of the release or assembly configurations, the tool (OX) being shaped to simultaneously bear: - against said upper flat surface (Ssup) of the first flange; and - against said pair of orientation surfaces (Sn1, Sn2) of the first flange while remaining away from a zone of the central through passage where the first microphone (M1) is located when said sound capturing unit (1) is in the assembly configuration.

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