Microphone transmission device with integrated ventilation.

Abstract

The invention relates to a transmission device (1) designed to cover an opening (2) in a trim panel (3) of a motor vehicle's passenger compartment (4). The device (1) comprises a transmission surface (6) for transmitting sound from the passenger compartment (4) through the transmission surface (6) to enable its acquisition by a microphone (7) disposed between the vehicle body and the trim panel (3) when the device (1) covers the opening (2). The device (1) comprises a support surface (8) designed to allow the device to be positioned against the trim panel to cover the opening. The device comprises at least one passage (14) between the support surface (8) and the transmission surface (6) to allow airflow through the opening (2) in the passage (14) when the device (1) covers the opening (2). (Figure 1)

Description

Title of the invention: Microphone transmission device with integrated ventilation.

[0001] The technical field concerns transmission devices for transmitting sound, assemblies comprising such a device and a microphone, vehicle interiors comprising at least one such assembly and finally vehicles comprising such a interior.

[0002] Modern automobiles are equipped with numerous pieces of equipment integrated and hidden behind the interior trim. Some of this equipment requires cooling because it tends to heat up during operation. This is particularly the case for audio systems or other electronic systems which are cooled by a fan placed near the device to be cooled or by air guides designed to bring fresh air to the equipment to be cooled. The air circulation, generated by the fan or provided by an air guide, thus circulates around the equipment to be cooled, for example a microphone, and is then evacuated into the passenger compartment of the vehicle, through the trim masking the equipment by dedicated ventilation grilles.

[0003] These ventilation grilles represent constraints in terms of integration costs and styles since it is obviously desirable that these grilles be as discreet as possible.

[0004] Thus, there is a need for a solution that makes it possible to avoid the constraints and additional costs associated with ventilation grilles, in a context where automobile manufacturers are particularly attentive to reducing the various elements necessary for the assembly of a vehicle.

[0005] The present invention aims to overcome the problems set out above. In this technical context, one aim of the present invention is to provide a solution for evacuating a flow of air towards the passenger compartment through a trim.

[0006] To this end, the present invention relates to a transmission device designed to cover an opening made in a trim of a passenger compartment of a motor vehicle, the device comprising a transmission surface allowing the transmission, from the passenger compartment through the transmission surface, of sounds to allow their acquisition by a microphone arranged between the body of the vehicle and the trim, when the device covers the opening, the device comprising a bearing surface designed to allow the device to be positioned in support of the trim to cover the opening, the device comprising at least one passage, made between the bearing surface and the transmission surface, to allow the cir culation of an air flow in each passage through the opening, when the device covers the opening.

[0007] The invention also relates to an assembly comprising a microphone and a transmission device according to the invention, the microphone being oriented relative to the transmission device to allow the acquisition of sound by the microphone through the transmission surface.

[0008] The invention also relates to a passenger compartment of a motor vehicle, comprising a trim providing at least one space, located between the trim and the body of the vehicle and open to the passenger compartment by at least one opening provided in the trim, the passenger compartment comprising at least one assembly according to the invention of which the microphone is arranged in a space, the transmission device covering the opening of the corresponding space, the bearing surface being in abutment against the trim, the assembly being dimensioned to allow the circulation of an air flow in the opening between the microphone and the trim and through each passage.

[0009] The invention finally relates to a motor vehicle having a passenger compartment according to the invention.

[0010] Thus, the device according to the invention allows air to circulate through the trim thanks to the existence of each passage. The arrangement of the passage, between the transmission surface and the support surface, allows efficient circulation of the air flow while making the passage discreet. Thus, the device according to the invention makes it possible to avoid the use of ventilation grilles and therefore to avoid the constraints and additional costs linked to these ventilation grilles. Thus, the device according to the invention makes it possible to obtain a passenger compartment according to the invention offering greater possibilities in terms of styles since the ventilation grilles can be eliminated. The device according to the invention makes it possible to reduce the manufacturing costs of a vehicle according to the invention.

[0011] According to one embodiment of the invention, each passage is shaped to direct the air flow circulating in the passage tangentially to the lining, when the device covers the opening.

[0012] According to one possibility, the transmission device comprises fixing means designed to allow the fixing of the device to the microphone.

[0013] According to one possibility of the assembly, the microphone comprises a plurality of retractable legs designed to allow the assembly to be locked in the opening provided in the trim.

[0014] The invention will be better understood on reading the detailed description which follows, given solely by way of non-limiting example and made with reference to the appended drawings in which:

[0015] [Fig-1] [Fig.l] represents a schematic sectional view of a passenger compartment according to the invention;

[0016] [Fig.2] [Fig.2] represents a sectional view along plane AA illustrated in [Fig.l]

[0017] [Fig.3] [Fig.3] represents a sectional view along plane BB illustrated in [Fig.l].

[0018] In these figures, the same references are used to designate the same elements.

[0019] A transmission device 1 according to the invention, shown diagrammatically in [Fig. 1], is designed to cover an opening 2 made in a trim 3 of a passenger compartment 4 according to the invention, partially illustrated in [Fig. 1], of a motor vehicle. In particular, the trim 3 is a ceiling light trim. In the passenger compartment 4 according to the invention, the trim 3 provides a space 5 located between the trim 3 and the body of the vehicle, not shown. The space 5 is open onto the passenger compartment 4 by the opening 2.

[0020] The device 1 according to the invention comprises a transmission surface 6 allowing the transmission from the passenger compartment 4, through the transmission surface 6, of sounds to allow their acquisition by a microphone 7 arranged in the space 5, when the device 1 covers the opening 2. The transmission surface 6 is, for example, a perforated surface and / or a grid similar to those usually encountered to protect a sound source.

[0021] The device 1 further comprises a bearing surface 8 designed to allow the device 1 to be positioned in support of the trim 3 to cover the opening 2. As illustrated in [Fig. 2], the bearing surface 8 consists, for example, of four feet 9, of rectangular section, each projecting from a ring 10 designed to be arranged between the microphone 7 and the transmission surface 6. The device 1, shown diagrammatically in the figures, advantageously comprises fixing means 11 designed to allow the device 1 to be fixed to the microphone 7 to form an assembly 12 according to the invention. For example, the fixing means 11 comprise a plurality of clipping tabs 13 projecting from the ring 10. In the assembly 12, the fixing means 11 are designed to ensure that the microphone 7 is oriented relative to the device 1 to allow the diffusion of the sound emitted by the microphone 7 through the transmission surface 6.In this case, the microphone 7 is oriented to allow the emission of sounds directly opposite the transmission surface 6.

[0022] The device 1 according to the invention comprises at least one passage 14, arranged between the bearing surface 8 and the transmission surface 6, to allow the circulation of an air flow in the passage 14 through the opening 2, when the device 1 covers the opening 2. In [Fig.l], each air flow is symbolized by an arrow. Thus, the air flow circulating in the passage 14 makes it possible to bring fresh air around the microphone 7 and / or equipment arranged behind the trim 3 to cool them. In this case and as illustrated in the figures and in particular [Fig.2], each passage 14 is arranged between two feet 9. Thus, each passage 14 is delimited by the feet 9, the gasket 3, the ring 10 and the transmission surface 6.

[0023] As illustrated by the arrows symbolizing each air flow, each passage 14 is shaped to direct the air flow circulating in the passage 14 tangentially to the trim 3 in the passenger compartment 4, when the device 1 covers the opening 2.

[0024] In the passenger compartment 4 according to the invention, the dimensions of the microphone 7 make it possible to ensure the circulation of the air flow in the opening 2, between the microphone 7 and the trim 3 and towards each passage 14.

[0025] Finally, as illustrated in [Fig. 3], in the assembly 12, the microphone 7 comprises a plurality of retractable tabs 15 designed to allow the assembly 12 to be inserted into the opening 2 in the retracted position and then to allow the assembly 12 to be locked in the opening 2 with the tabs in the deployed position.

[0026] As illustrated in [Fig.l], the air flow is, for example, generated by a fan 16 integrated into the assembly 12.

[0027] Thus, the device 1 according to the invention allows the circulation of air through the lining 3 thanks to the existence of each passage 14. The arrangement of the passage 14, between the transmission surface 6 and the support surface 8 allows efficient circulation of the air flow while being discreet. Thus, the device 1 according to the invention makes it possible to avoid the use of ventilation grilles and therefore to avoid the constraints and additional costs linked to these ventilation grilles.

[0028] According to one possibility of the invention, the device 1 also makes it possible to cover an opening 2 masking a sound production device, not illustrated, the sound of which is then transmitted through the transmission surface 6.

[0029] The invention is not limited to the embodiment of the transmission device described above, only by way of example, but other embodiments can be designed by those skilled in the art without departing from the scope and scope of the present invention.

Claims

Claims

1. A transmission device (1) designed to cover an opening (2) provided in a trim (3) of a passenger compartment (4) of a motor vehicle, the device (1) comprising a transmission surface (6) allowing the transmission, from the passenger compartment (4) through the transmission surface (6), of sounds to allow their acquisition by a microphone (7) arranged between the body of the vehicle and the trim (3), when the device (1) covers the opening (2), the device (1) comprising a bearing surface (8) designed to allow the device to be positioned in support of the trim to cover the opening (2), the device comprising at least one passage (14), provided between the bearing surface (8) and the transmission surface (6), to allow the circulation of an air flow in each passage (14) through the opening (2), when the device (1) covers the opening (2).

2. Transmission device (1) according to claim 1, characterized in that each passage (14) is shaped to direct the air flow circulating in the passage (14) tangentially to the lining (3), when the device (1) covers the opening (2).

3. Transmission device (1) according to claim 1 or 2, characterized in that it comprises fixing means (11) designed to allow the fixing of the device (1) to the microphone (7).

4. Assembly (12) comprising a microphone (7) and a transmission device (1) according to one of claims 1 to 3, the microphone (7) being oriented relative to the transmission device (1) to allow the acquisition of sound by the microphone (7) through the transmission surface (6).

5. Assembly (12) according to claim 4, characterized in that the microphone (7) comprises a plurality of retractable tabs (15) designed to allow the assembly (12) to be locked in the opening (2) provided in the trim (3).

6. Passenger compartment (4) of a motor vehicle, comprising a trim (3) providing at least one space (5) located between the trim (3) and the body of the vehicle and open onto the passenger compartment (4) by at least one opening (2) provided in the trim (3), the passenger compartment (4) comprising at least one assembly (12) according to claim 4 or 5, the microphone (7) of which is arranged in a space (5), the transmission device (1) covering the opening (2) of the corresponding space (5), the bearing surface (8) being in support of the lining (3), the assembly (12) being dimensioned to allow the circulation of an air flow in the opening (2) between the microphone (7) and the lining (3) and through each passage (14).

7. Motor vehicle having a passenger compartment (4) according to claim 6.

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