SYSTEM FOR ROTATING MOUNTING A COVER PLATE FOR A CAR TRUNK

Description

[0001] The invention relates to a rotational mounting system for a cover shelf of a luggage compartment of a motor vehicle on a trim of said compartment, and an assembly comprising a trim and a shelf mounted on it by such a system.

[0002] A system for rotating a luggage compartment cover shelf of a motor vehicle onto a trim panel of said compartment is known, said system comprising two devices for rotating the shelf, each of said devices comprising: a transverse finger attached to said tablet - respectively or to said trim, a receiver fitted to said finger attached to said trim - respectively or to said tablet - said receiver having a housing for receiving said finger in adjusted contact, said housing being provided with a first opening leading horizontally so that said tablet is mounted by horizontal translation.

[0003] Such a system allows the tablet to be raised from its horizontal covering position to a raised position for accessing luggage.

[0004] It may be desirable to equip the tablet with at least one electrodynamic transducer to ensure the transmission of an electrical signal, for example from a radio or a disc player.

[0005] To achieve this, an electrical signal is transformed into an acoustic signal using the tablet's wall as the radiating surface. However, a system such as the one described above does not allow the tablet to vibrate in a preferred vertical direction—that is, perpendicular to the horizontal plane in which it is generally oriented—which corresponds to a suspension mode in which the tablet does not undergo deformation (rigid body mode). Document JP 2 865245 B2 discloses a system for rotating a luggage compartment cover shelf of a motor vehicle onto a trim panel of said compartment conforming to the preamble of claim 1.

[0006] The invention aims to provide an improved system to ensure such vibration, while preserving the ergonomics of tablet mounting and its decoupling to limit the transmission of vibrations to the rest of the vehicle, and in particular to the seat backs and luggage compartment trim.

[0007] To this end, and according to a first aspect, the invention proposes a rotational mounting system for a cover shelf of a luggage compartment of a motor vehicle on a trim of said compartment, having the characteristics of claim 1.

[0008] In this description, the terms referring to spatial positioning (up, down, superior, inferior, longitudinal, transverse, lateral, front, rear, vertical, horizontal, etc.) are used in reference to the system installed in the vehicle. With the proposed layout: The presence of the decoupling device between the receiver and the upper and lower walls allows the tablet to vibrate vertically (flexural waves). The presence of the air gap ensures that this vertical vibration is not impeded and that the ergonomics of tablet assembly are not compromised. Indeed, under the pressure exerted on the tablet to achieve its insertion, the movement of the receiver relative to the middle wall cannot exceed the dimension corresponding to the thickness of the air gap. This thickness—chosen, for example, to be less than 1.5 mm—corresponds to the maximum overtravel that the tablet can make relative to its nominal positioning during assembly. By choosing a sufficiently small thickness, the user inserting the tablet does not experience the sensation of "pushing into thin air."Furthermore, the presence of the air gap prevents the transmission of vibrations in a horizontal plane.

[0009] According to a second aspect, the invention proposes an assembly comprising a trim and a shelf mounted on it by such a system.

[0010] Other features and advantages of the invention will become apparent in the following description, made with reference to the accompanying figures, in which: [ Fig.1a ] And [ Fig.1b ] are schematic partial perspective views of an assembly according to, respectively, an embodiment of the invention, the tablet being detached from the trim, [ Fig.2 ] is a schematic perspective detail view of an interlocking device according to the realization of the figure 1a , [ Fig.3a ] And [ Fig.3b ] are schematic longitudinal cross-sectional views of a device according to, respectively, an embodiment of the invention, the figure 3a corresponding to the figure 2 , [ Fig.4 ] is a representation of the transmissibility of vibrations (that is, the ratio between the vibrations upstream - namely at the tablet - and downstream - namely at the trim level) as a function of the frequency (in Hertz) of a device according to the figure 3b (curve 2) compared to that of an analogous device without an air gap (curve 1).

[0011] With reference to the figures, a system 1 for rotating a shelf 2 covering a luggage compartment of a motor vehicle onto a trim 3 of said compartment is described, said system comprising two interlocking devices 4 for said rotating shelf, each of said devices comprising: a transverse finger 5 attached to said tablet, according to the representations of figures 1a et 1b - respectively or of said fitting, in a manner not shown -, a receiver 6 in joint with said finger integral with said fitting, according to the representations of the figures 1a et 1b - respectively or of said tablet, in a manner not shown - said receiver having a housing 7 for receiving said finger in adjusted contact, said housing being provided with a first opening 8 opening horizontally so that said tablet is mounted by horizontal translation, the system also exhibits the following characteristics: It further includes a cavity 9 provided in said fitting, according to the representations of figures 1a et 1b - respectively or said tablet, in a manner not shown -, said receiver being mounted in said cavity, said first opening leading to a second opening 10 provided in said cavity, said cavity having an upper wall 11, a lower wall 12 and a middle wall 13 connecting them together, it further includes a decoupling means 14 of elastically compressible material extending between said receiver and said upper and lower walls, an air gap 15 is provided between said receiver and said middle wall.

[0012] According to the embodiment shown in figure 3a , the decoupling means 14 further extends between the receiver 6 and the median wall 13, the air gap 15 being located between said means and said wall.

[0013] The extension of the decoupling means 14 in relation to the median wall 13 ensures that there is no contact between the receiver 6 and the median wall 13 when mounting the tablet 2, and thus avoids unwanted noise.

[0014] According to one embodiment, the decoupling means 14 is based on elastomeric material.

[0015] The elastomer material is in particular of the thermoplastic elastomer (TPE) type, including materials of the polyolefin (TPO), polystyrene (TPS), polyurethane (TPU) type or even vulcanized thermoplastic (TPV), the choice of material being made according to the required requirements.

[0016] According to one embodiment, the decoupling means 14 has the following characteristics: Its hardness, measured according to the ISO 868 standard in force on the date of filing the application, is between 25 and 90 shore A, and / or its compression set (CS), measured according to the ISO 815 standard in force on the date of filing the application, is less than 40%, the measurement being carried out at a temperature of 23°C, after a 24h deformation stress.

[0017] According to one design, the air gap 15 has a minimum thickness of 0.5 mm.

[0018] According to one design, the air gap 15 has a maximum thickness of 2 mm.

[0019] According to the achievements represented: the upper wall 11 and lower wall 12 are in horizontal planes, the receiver 6 having upper external faces 16 and lower external faces 17 parallel to said upper and lower walls, the decoupling means 14 having at top and bottom the same first thickness 18, the middle wall 13 is in a vertical plane, the receiver also having a middle external face 19 parallel to said middle wall.

[0020] According to one embodiment, the first thickness 18 is between 2 and 5 mm, the choice of a sufficient thickness being necessary to allow adequate vertical vibration of the tablet 2.

[0021] According to the embodiment shown in figure 3a , the decoupling means 14 has, opposite the median wall 13, a second thickness 20 which is less than the first thickness 18.

[0022] According to one embodiment, the second thickness 20 is between 0.5 and 2 mm, in order to minimize the movement of the receiver 6 when mounting the tablet 2, and thus optimize the ergonomics of mounting.

[0023] According to the embodiments represented, the housing 7 has a generally C-shaped section whose opening - corresponding to the first opening 8 - is elastically enlargeable - the receiver 6 being in particular made of molded plastic material - so as to allow a forced insertion of the finger 5 and its retention in said housing once said opening has returned to its undeformed state.

[0024] According to the embodiments represented, the second opening 10 is delimited at the top and bottom by two returns 21 coming from the upper wall 11 and lower wall 12 respectively, said returns forming anti-extraction stops for the decoupling means 14 of the cavity 9.

[0025] According to the implementation of the figure 3b , the receiver 6 is set back from the decoupling means 14 with respect to the median wall 13, said means bearing against said wall and said receiver being moved away from it so as to define the air gap 15.

[0026] According to the implementation of the figure 3a , the decoupling means 14 has two projections 23 bearing on the top and bottom of the median wall 13, the air gap 15 extending between said projections.

[0027] Finally, we describe, with reference to figures 1a et 1b , an assembly comprising a trim 3 and a shelf 2 mounted on it by such a system, said shelf being provided with an electrodynamic transducer 22.

[0028] In the realization of the figure 1a , the fingers 5 are attached to the front corners of the tablet 2 and the receivers 6 are attached to the side parts of the trim 3 of the luggage compartment.

[0029] In the realization of the figure 1b , the fingers 5 are attached to the rear edge of the tablet 2 and the receivers 6 are attached to the rear part of the trim 3 of the luggage compartment, said part being located on the tailgate of the vehicle.

[0030] According to unrepresented examples, it may be foreseen, in the implementations of figures 1a et 1b , to interchange the positioning of the fingers 5 and the receivers 6, namely to position said fingers on the trim 3 and said receivers on the shelf 2.

[0031] We are now commenting on the curves of the figure 4 .

[0032] We observe that the decoupling is improved by the presence of the air blade 15, the first resonance frequency being shifted towards lower frequencies and the transmission of vibrations being reduced earlier in the high frequencies (with a factor greater than 2 at 50 Hz).

[0033] It should also be noted that the fact of planning, depending on the realization of the figure 3a that the decoupling means 14 further extends between the receiver 6 and the median wall 13 leads to acoustic behavior analogous to that of the realization of the figure 3b .

Claims

1. System (1) for rotatably mounting a covering panel (2) for a motor vehicle trunk on a trim (3) of said compartment, said system comprising two devices (4) for rotatably slotting said panel, each of said devices comprising: - a transverse finger (5) intended to be secured to said panel - respectively to said trim, - a receiver (6) for said finger intended to be secured to said trim - respectively to said panel - said receiver having a recess (7) for receiving said finger in close contact, said recess being provided with a first opening (8) that is horizontally accessible so that said panel can be mounted by horizontal translation, the system also having the following features: - it further comprises a cavity (9) provided in said trim - or respectively in said panel -, said receiver being mounted in said cavity, said first opening leading into a second opening (10) provided in said cavity, said cavity having an upper wall (11), a lower wall (12) and a middle wall (13) connecting them, the system being characterised in that it further comprises a decoupling means (14) made of elastically compressible material extending between said receiver and said upper and lower walls, and in that an air gap (15) is provided between said receiver and said middle wall.

2. System according to claim 1, characterized in that the decoupling means (14) further extends between the receiver (6) and the middle wall (13), the air gap (15) being located between said means and said wall.

3. System according to one of the preceding claims, characterized in that the decoupling means (14) is based on elastomer material.

4. System according to any of the preceding claims, characterized in that the air gap (15) has a minimum thickness of 0.5 mm.

5. System according to any of the preceding claims, characterized in that: - the upper (11) and lower (12) walls lie in horizontal planes, the receiver (6) having upper (16) and lower (17) external faces parallel to said upper and lower walls, the decoupling means (14) having a same first thickness (18) at the top and bottom, - the middle wall (13) lies in a vertical plane, and the receiver (6) also has a middle outer face (19) parallel to said middle wall.

6. A system as claimed in claim 5, when related to claim 2, characterized in that the decoupling means (14) has a second thickness (20) opposite the middle wall (13) which is less than the first thickness (18).

7. A system according to any one of the preceding claims, characterized in that the recess (7) has a generally C-shaped cross-section, the opening of which is elastically enlargeable so as to enable the finger (5) to be forcibly inserted and held in said recess once said opening has returned to its undeformed state.

8. System according to any one of the preceding claims, characterized in that the second opening (10) is delimited at the top and bottom by two returns (21) coming respectively from the upper (11) and lower (12) walls, said returns forming anti-extraction stops for preventing the extraction of the decoupling means (14) from the cavity (9).

9. Assembly comprising a trim (3) and a panel (2) mounted thereon by a system according to any of the preceding claims, said panel being provided with an electrodynamic transducer (22).