Resonating body with simplified assembly

Abstract

In order to create a resonance body (10) for use in a vehicle door (200) with an opening (11) which is designed to accommodate a loudspeaker (20), in particular a low-frequency loudspeaker, at least in part, and which can also be retrofitted into a vehicle door (200) in a particularly simple manner, it is proposed to design the resonance body (10) as a barrier to a door interior (201) of the vehicle door (100) and to provide fastening sections (12) in the area of ​​the opening (11).

Description

[0001] The invention relates to a resonance body for use in a vehicle door, wherein the resonance body has an opening configured to accommodate a loudspeaker. Furthermore, the invention relates to an arrangement comprising a vehicle door and a resonance body, and to a method for mounting a resonance body on a door section of a vehicle door.

[0002] For acoustic reasons, a woofer is installed in the rear of a vehicle in the footwell area of ​​four-door vehicles with standard doors. Since the interior of the door (between the inner and outer panels) is designed as a wet space, an internal volume of the door itself is used as a resonance chamber for a woofer. Vehicle doors without a wet space also eliminate the sealing requirements between the wet and dry spaces of the door, eliminating this enclosed volume of the vehicle door as a resonance body. This is possible, for example, with sliding doors. A vehicle door modified in this way results in a loss of the resonance chamber of the woofer.Due to the lack of separation of the air masses between the rear and front of the woofer, sufficient sound pressure can no longer be generated, resulting in an acoustic short circuit, which can lead to weak bass performance. Sealing the speaker with the enclosure typically has no effect on the speaker's bass performance.

[0003] There are known solutions that design a vehicle door as a closed body, even without sealing requirements regarding the potential penetration of moisture into the vehicle interior. However, such a vehicle door design is cost-effective and results in a higher weight.

[0004] Furthermore, solutions are known that propose a loudspeaker or subwoofer with an integrated speaker to generate its own resonance volume. Developing a loudspeaker specifically adapted to the installation space of the vehicle door also involves increased weight and expense. Such a solution further complicates the development of variants.

[0005] Solutions with external speakers positioned outside the vehicle door are also known. Placing the speaker outside the vehicle door typically results in a deterioration in the sound experience for rear seat passengers, as the speaker is usually positioned behind the passengers.

[0006] DE 10 2020 209 381 A1 discloses a vehicle door with a wet compartment and a dry compartment. A loudspeaker is integrated into the vehicle door and is connected to a resonator component to form a resonance chamber for the loudspeaker. The resonator component is positioned as a closed volume in the wet compartment. The resonator component has lateral fastening sections for separately connecting the resonator component to a front side of a door inner skin.

[0007] DE 10 2017 222 630 A1 describes a lightweight support with an integrated loudspeaker box as a resonance body. The lightweight support is designed to be mounted in a vehicle door. The volume of the loudspeaker box can be varied to adapt it to different loudspeakers.

[0008] EP 2 870 032 B1 discloses a loudspeaker system that is installed in a vehicle door. A two-part loudspeaker box is proposed. A first part of the loudspeaker box is arranged in the wet compartment of the vehicle door, and a second part is arranged in the dry compartment. The loudspeaker box has an opening for accommodating the loudspeaker and a second opening facing the vehicle interior to improve the propagation of sound waves.

[0009] The invention is based on the object of creating a resonance body and an arrangement which can be retrofitted in a vehicle door in a particularly simple manner in order to optimise the frequency response of a loudspeaker in the low frequency range.

[0010] This object is achieved by the features specified in claim 1. Further advantageous embodiments of the invention are described in the subclaims.

[0011] According to one aspect of the invention, a resonator for use in a vehicle door is provided. The resonator has an opening configured to at least partially accommodate a loudspeaker, in particular a woofer. The resonator can enclose a resonance volume accessible through the opening. Depending on the design, the resonator can be constructed in two or more parts, allowing further access to the resonance volume by removing or dismantling a part of the resonator.

[0012] The opening can be shaped such that the loudspeaker can be arranged and secured within the opening. Depending on the design of the opening, a collar or a rim can be provided to at least facilitate the attachment of the resonator and / or the loudspeaker. Furthermore, the loudspeaker, when mounted, can protrude partially or completely through the opening into the resonant volume.

[0013] The resonance body is designed as a barrier to the interior of the vehicle door and can therefore also be sealed against moisture.

[0014] The resonator according to the invention enables a variable and cost-effective solution for acoustic short circuits, resulting in direct added value for the customer. In particular, the use of so-called COP loudspeakers in combination with a single body shell variant of a vehicle door can be implemented particularly cost-effectively with the resonator. The targeted isolation of the necessary volume by the resonator, which can be designed as a plastic body, also leads to weight savings in the door compared to a sealed design of the vehicle door shell.

[0015] Advantageously, fastening means are provided directly at the opening of the resonator to secure the resonator directly to the opening. The resonator can be attached to a mounting recess in the vehicle door that was originally intended for the installation of a loudspeaker. This measure also allows the use of mounting holes in the area of ​​the mounting recess that can be used together with the loudspeaker. This allows the resonator to be subsequently installed in the vehicle door as part of a retrofit solution. Advantageously, the resonator can also be technically easily implemented in series production, as no modifications to the vehicle door are required.

[0016] The resonator is designed to spatially separate the air masses behind and in front of the loudspeaker. After the loudspeaker is inserted into the resonator, a first air mass or volume of air can be enclosed behind the loudspeaker. A second air volume or mass of air remains in front of the loudspeaker, which is located in front of the loudspeaker. All air masses located outside the interior volume of the resonator can be considered air masses located in front of the loudspeaker.

[0017] The resonance body allows air masses behind and in front of the loudspeaker to be specifically separated in order to prevent air circulation and thus generate higher sound pressure.

[0018] According to a further aspect of the invention, an arrangement is provided. The arrangement comprises a vehicle door and at least one resonance body according to the invention and at least one loudspeaker. The vehicle door has a door interior and a dry space or vehicle interior, which are separated from one another by at least one door section. The door section can, for example, be a component made of at least one metal and / or a plastic, which functions as a partition between the door interior or wet space and the vehicle interior of the vehicle door. The vehicle interior of the vehicle door can be configured as a volume of the vehicle door, which faces the vehicle interior or the passenger compartment and is connected to it.

[0019] The resonator is attached to a recess or mounting recess in the door section and serves as a barrier between the door interior and the vehicle interior of the vehicle door, spatially separating air masses behind and in front of a loudspeaker. The mounting recess can advantageously also be designed as a mounting recess for the loudspeaker. The loudspeaker is attached to the mounting recess of the door section in such a way that it protrudes at least partially through an opening in the resonator into a volume of the resonator.

[0020] According to a further aspect of the invention, a method for mounting a resonance body on a door section of a vehicle door is provided. The resonance body is inserted from a vehicle interior through at least one opening or recess of a door section into a door interior of the vehicle door and is aligned with a fastening recess such that an opening of the resonance body overlaps the fastening recess at least in part. This step can be carried out during manufacture of the vehicle door or subsequently after removal of a panel or a cover of the vehicle door facing the vehicle interior. The at least one resonance body is connected to the door section in the region of the fastening recess directly or indirectly via at least one loudspeaker.This allows the resonance body to be attached to the mounting recess independently of the loudspeaker or together with the loudspeaker.

[0021] In one embodiment, the opening has a round, oval, or polygonal shape. This allows the resonator to be adapted to a variety of different mounting recesses and / or loudspeakers.

[0022] According to another embodiment, the resonator is designed in one or more parts. Advantageously, the resonator is manufactured using a 3D printing process or by injection molding. These measures allow for flexible production of the resonator and variation of the shapes. For example, a two-part resonator can be manufactured in a standard version or a premium version, with one part of the resonator remaining identical with the opening and only a second part of the resonator being modified. This measure reduces the variety of components and enables cost-efficient production.

[0023] The resonator can seal the wet compartment or door interior from the vehicle interior in the area of ​​the mounting recess if the latter is designed to be fluid-tight to the interior of the vehicle door. For this purpose, the resonator can be designed as a single piece or consist of several parts that are connected to one another by means of a material bond or seals.

[0024] According to a further embodiment, the resonator has fastening sections for attaching the resonator to the door section using fastening means. Advantageously, the fastening sections are designed as integrally formed internal threads, threaded inserts with internal threads, threaded inserts with threaded rods, or integral threaded rods for projecting into the vehicle interior and / or openings for inserting riveted connections or clip connections. The fastening sections are preferably arranged directly at the opening of the resonator to enable the resonator to be attached to existing fastening recesses in door sections.

[0025] The resonance body can be attached to the door section through the fastening sections by means of direct screwing into the threaded inserts or integral internal threads. Depending on the design, the loudspeaker can be attached to the door section using the same fastening means. This fastening option can also be implemented using fastening sections designed as protruding bolts or threaded pins. The bolts or threaded pins can protrude through the door section and thus enable counter-tightening by deforming the bolts or with additional fastening means, such as nuts. This fastening option can also enable the resonance body to be attached separately to the door section and / or the loudspeaker to be attached together with the resonance body to the door section.

[0026] In an advantageous embodiment, the resonator can be attached to the mounting recess inside the door interior, and the loudspeaker can be attached to the mounting recess inside the vehicle interior. Depending on the design of the resonator and the loudspeaker, the opening or a collar of the resonator can protrude through the mounting recess from the door interior into the vehicle interior, thus enabling the loudspeaker to be attached directly to the resonator. The loudspeaker can be connected directly to the door section or indirectly to the door section via the resonator.

[0027] According to a further embodiment, the at least one loudspeaker can be fastened to the door section via the fastening sections of the resonance body. This measure enables the joint use of at least some of the fastening means used, such as screws or rivets, for connecting the loudspeaker and the resonance body to the door section of the vehicle door.

[0028] The at least one loudspeaker can be mounted at a later time or subsequently if the loudspeaker can be attached to the door section independently of the resonance body.

[0029] According to a further embodiment, at least one seal is arranged between the resonator and the door section and / or between the loudspeaker. This measure enables a particularly dampened connection of the loudspeaker, which not only seals the door section from the door interior but also reduces parasitic vibrations and oscillations of the loudspeaker.

[0030] Exemplary embodiments of the invention are explained in more detail below with reference to the drawings. They show: Fig. 1 a perspective view of a resonance body according to the invention according to an embodiment, Fig. 2 a sectional view of an arrangement according to the invention with a resonance body made of Fig. 1, Fig. 3 a schematic diagram illustrating a frequency spectrum of a loudspeaker with and without the resonance body of Fig. 1, and Fig. 4 schematic representations to illustrate a method for assembling a resonance body from Fig. 1.

[0031] In the figures, the same structural elements have the same reference numerals.

[0032] The Fig. Figure 1 shows a perspective view of a resonance body 10 according to the invention according to one embodiment. The resonance body 10 has an opening 11 which is designed to accommodate a loudspeaker 20 (see Fig. 2), in particular a bass loudspeaker, at least partially. The resonating body 10 can enclose a resonance volume V, which is accessible via the opening 11. Depending on the design, the resonating body 10 can be constructed in two or more parts, so that removing or dismantling a part of the resonating body 10 allows further access to the resonance volume V.

[0033] In the illustrated embodiment, the opening 11 is round. The resonance volume V has a substantially rectangular cross-section with rounded corners and edges and becomes increasingly flatter in the direction of the arrow. Directly in the area of ​​the opening 11, fastening sections 12 are also provided for attaching the resonance body 10 to a Fig. 2, door section 210. In the illustrated embodiment, the fastening sections 12 are designed as integrally formed internal threads.

[0034] For correct alignment of the resonance body 10 relative to a mounting recess 111 (see Fig. 2 and Fig. 4) a marking 14 in the form of a peripheral recess is positioned at the opening 11.

[0035] In the Fig. 2 is a sectional view of an arrangement 100 according to the invention with a resonator 10 made of Fig. 1 shown.

[0036] The arrangement 100 comprises a vehicle door 200 and at least one resonance body 10 according to the invention and at least one loudspeaker 20. The vehicle door 200 comprises a wet space or door interior 201 and a vehicle interior 202, which are separated from one another by at least one door section 210. In the illustrated embodiment, the door section 210 is designed as a component made of a metal, in particular sheet metal, and forms a partition wall between the door interior 201 and the vehicle interior 202 of the vehicle door 200. A plan view of the door section 210 is shown in the Fig. 4 shown.

[0037] The resonance body 10 is attached to a recess or fastening recess 211 of the door section 210 and serves as a barrier between the door interior 201 and the vehicle interior 202 of the vehicle door 200. The fastening recess 211 can advantageously be designed simultaneously as a fastening recess for the loudspeaker 20 and the resonance body 10. The opening 11 of the resonance body 10 and the fastening recess 211 are preferably aligned concentrically or at least partially overlapping one another.

[0038] The loudspeaker 20 is attached to the fastening recess 211 of the door section 210 in such a way that it projects at least partially through an opening 11 of the resonance body 10 into the resonance volume V of the resonance body 10. In the Fig. Figure 2 also illustrates the increasing tapering of the resonator 10 in the direction of the arrow. This measure enables, for example, a positive adaptation of the resonator 10 to an outer contour 203 of the vehicle door 200 and / or an acoustic optimization of the resonance behavior of the loudspeaker 20.

[0039] Furthermore, the Fig. 2 shows a detailed view of an exemplary fastening section 12, which is designed as an integral internal thread. Fasteners 13 in the form of screws are used to fasten the loudspeaker 20 to the fastening sections 12 of the resonator 10 through corresponding holes in the door section 210. Thus, the door section 210 and the loudspeaker 20 are counter-tightened or screwed between the fastening sections 12 of the resonator 10 and the fastening means 13.

[0040] The Fig. 3 shows a schematic diagram illustrating a frequency spectrum of a loudspeaker 20 with and without the resonance body 10 of Fig. 1. This graph shows a curve of sound intensity in dB as a function of frequency in Hz. The circled area shows the difference between the frequency spectrum F1 of loudspeaker 20 without a resonator 10 and the frequency spectrum F2 of a loudspeaker 20 with a resonator 10. For example, the resonator 10 results in a 5 dB increase in sound intensity in the low-frequency or bass range. Furthermore, an increase in sound intensity in the mid-frequency range is also visible.

[0041] In the Fig. 4A - 4D are schematic diagrams illustrating a method for assembling a resonator 10 of Fig. 1. The method is used to mount the resonator 10 on a door portion 210 of the vehicle door 200.

[0042] The resonator 10 is inserted from a vehicle interior 202 through at least one opening or recess 215 of a door section 210 into a door interior 201 of the vehicle door 200. This step is shown in the Fig. 4A shown.

[0043] In a further step, which is in the Fig. 4B and Fig. 4C, the resonator 10 is aligned with a mounting recess 211 of the door section 210 such that an opening 11 of the resonator 10 overlaps, at least in part, with the mounting recess 211. In doing so, a relative orientation of the resonator 10 is also adjusted. For this purpose, for example, the marking 14 in the form of an edge-side recess on the opening 11 is brought into overlap with a marking 214 on the mounting recess 211 of the door section 210. This allows the mounting sections 12 of the resonator to be optimally utilized and are not obscured by areas of the door section 210.

[0044] These steps can be carried out during the manufacture of the vehicle door 200 or subsequently after removing a panel (not shown) or a cover of the vehicle door facing the vehicle interior.

[0045] In a Fig.In the step shown in Figure 4D, the at least one resonator 10 is connected to the door section 210 in the region of the fastening recess 211. For example, a fastening means 13 is used here for directly connecting the resonator 10. List of reference symbols 100 arrangement 200 vehicle door 201 Door interior 202 Vehicle interior 203 Outer contour of the vehicle door 210 door section 211 Mounting recess 214 Marking on the mounting recess 215 Opening / recess of a door section 10 resonance bodies 11 Opening of the resonance body 12 Fastening section 13 Fasteners 14 Marking on the resonator 20 speakers F1 Frequency spectrum of a loudspeaker without a resonance body F2 Frequency spectrum of a loudspeaker with a resonance body V Resonance volume QUOTES CONTAINED IN THE DESCRIPTION

[0000] This list of documents submitted by the applicant was generated automatically and is included solely for the convenience of the reader. This list is not part of the German patent or utility model application. The DPMA assumes no liability for any errors or omissions. Cited patent literature

[0000] DE 10 2020 209 381 A1

[0006] DE 10 2017 222 630 A1

[0007] EP 2 870 032 B1

[0008]

Claims

[1] Resonance body (10) for use in a vehicle door (200), wherein the resonance body (10) has an opening (11), wherein the opening (11) is designed to accommodate a loudspeaker (20), in particular a woofer, at least in part, wherein the resonance body (10) is designed as a barrier to a door interior (201) of the vehicle door (100) and has fastening sections (12) in the region of the opening (11), wherein the resonance body (10) is designed to spatially separate air masses behind and in front of the loudspeaker (20) from one another. [2] Resonator according to claim 1, wherein the opening (11) has a round shape. [3] Resonance body according to claim 1, wherein the opening (11) has an oval shape. [4] Resonator according to claim 1, wherein the opening (11) has a polygonal shape. [5] Resonance body according to one of claims 1 to 4, wherein the resonance body (10) is designed in one part or in several parts. [6] Resonance body according to one of claims 1 to 5, wherein the resonance body (10) is produced by a 3D printing process or by injection molding. [7] An arrangement (100) comprising a vehicle door (200) and at least one resonance body (10) according to any one of the preceding claims, wherein the vehicle door (200) has a door interior (201) and a vehicle interior (202), which are separated from one another by at least one door section (210), comprising at least one loudspeaker (20), wherein the resonance body (10) is fastened to a fastening recess (211) of the door section (210) and is designed as a barrier between the door interior (201) and the vehicle interior (202) in order to spatially separate air masses behind and in front of a loudspeaker (20), wherein the loudspeaker (20) is fastened to the fastening recess (211) of the door section (210) in such a way that it projects at least partially into a volume (V) of the resonance body (10) via an opening (11) of the resonance body (10). [8] Arrangement according to claim 7, wherein the resonance body (10) is designed to be fluid-tight. [9] Arrangement according to claim 7 or 8, wherein the resonance body (10) has fastening sections (12) for fastening the resonance body (10) to the door section (210) by means of fastening means (13). [10] Arrangement according to claim 9, wherein the fastening sections (12) are designed as integrally designed internal threads, threaded inserts with internal threads, threaded inserts with threaded rods or integral threaded rods for projecting into the vehicle interior (202) and / or openings for introducing riveted connections or clip connections. [11] Arrangement according to claim 9 or 10, wherein the at least one loudspeaker (20) can be fastened to the door section (210) via the fastening sections (12) of the resonance body (10). [12] Arrangement according to claim 9 or 10, wherein the at least one loudspeaker (20) can be fastened to the door section (210) independently of the resonance body (10). [13] Arrangement according to one of claims 7 to 12, wherein at least one seal is arranged between the resonance body (10) and the door section (210). [14] Arrangement according to one of claims 7 to 12, wherein at least one seal is arranged between the resonance body (10) and the loudspeaker (20) and / or between the door section (210) and the loudspeaker (20) [15] Method for mounting a resonance body (10) on a door section (210) of a vehicle door (200), wherein the resonance body (10) is inserted from a vehicle interior (202) through at least one opening (215) of a door section (210) into a door interior (201) of the vehicle door (200) and is aligned on a fastening recess (211) such that an opening (11) of the resonance body (10) overlaps at least partially with the fastening recess (211), wherein the resonance body (10) is connected to the door section (210) in the region of the fastening recess (211) directly or indirectly via at least one loudspeaker (20).

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