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CN-122029834-A - Method for manufacturing vehicle, speaker and vehicle

CN122029834ACN 122029834 ACN122029834 ACN 122029834ACN-122029834-A

Abstract

There is provided a vehicle manufacturing method comprising providing a precursor vehicle, the precursor vehicle comprising a body having a weight of at least 100kg, the body comprising an airtight surface configured to face an interior of a vehicle manufactured by the precursor vehicle, providing a speaker module for generating low-frequency sound, the speaker module comprising a speaker frame, a diaphragm suspended from the speaker frame, and a drive unit configured to move the diaphragm to generate sound, the speaker frame having a rear opening, forming a partially enclosed volume between the diaphragm, the speaker frame and the rear opening. The method further includes attaching the speaker module to the body to form a sealed volume bounded by the air-tight surface of the body, the speaker frame, and the diaphragm, the partially enclosed volume forming at least a majority of the sealed volume.

Inventors

  • Tom Hallwater
  • VINET FRANCOIS
  • D. Colin

Assignees

  • PSS比利时股份有限公司

Dates

Publication Date
20260512
Application Date
20240924
Priority Date
20230928

Claims (15)

  1. 1. A method for manufacturing a vehicle, the method comprising: providing a precursor vehicle, wherein the precursor vehicle comprises a body having a weight of at least 100kg, wherein the body comprises an airtight surface configured to face an interior of a vehicle manufactured from the precursor vehicle; Providing a speaker module for generating bass frequency sound, wherein the speaker module comprises a speaker frame, a diaphragm suspended on the speaker frame, and a driving unit configured to move the diaphragm to generate sound; wherein the speaker frame has a rear opening, Wherein a partially enclosed volume is formed between the diaphragm, the speaker frame and the rear opening, Wherein the method comprises the following steps: Attaching the speaker module to the body to form a sealed volume defined by an airtight surface of the body, the speaker frame, and the diaphragm; Wherein the partially enclosed volume forms at least a majority of the sealed volume.
  2. 2. The method of claim 1, wherein attaching the speaker module to the body comprises attaching the speaker module to the speaker frame using a plurality of fastening members.
  3. 3. The method of claim 2, wherein attaching the speaker module to the body using the plurality of fastening members comprises positioning the fastening members in a corresponding plurality of blind holes within the body.
  4. 4. The method of claim 2, wherein, The plurality of fastening members are permanently attached to and extend from the airtight surface, and Attaching the speaker module to the body includes receiving the plurality of fastening members into the speaker frame.
  5. 5. The method according to any of the preceding claims, wherein, The speaker frame includes an outer frame portion defining the rear opening, and Attaching the speaker module to the body includes attaching the outer frame portion to the body.
  6. 6. The method according to any of the preceding claims, wherein, The speaker frame includes an inner frame portion attached to the driving unit, and Attaching the speaker module to the body includes attaching the inner frame portion to the body.
  7. 7. The method of any of the preceding claims, wherein attaching the speaker module to the body comprises attaching the drive unit to the body.
  8. 8. The method of any of the preceding claims, wherein the airtight surface is substantially flat and the partially enclosed volume of the speaker module forms substantially all of the sealed volume.
  9. 9. The method of any preceding claim, wherein the body is included in a unitary body structure.
  10. 10. The method according to any of the preceding claims, wherein, The speaker module includes a movable assembly including the diaphragm and a movable part of the driving unit, and The mass of the movable part of the drive unit may be at least 60% of the mass of the movable assembly.
  11. 11. The method of claim 10, wherein, The speaker module being operable to magnetically cooperate the movable part of the drive unit with the fixed part of the drive unit to move the movable assembly along a movement axis to produce sound, and The ratio of the mass of the movable part of the drive unit to the effective sound radiating area Sd of the diaphragm is at least 5kg per square meter, alternatively at least 7 kg per square meter.
  12. 12. The method of any of the preceding claims, wherein the ratio of the sealing volume to the effective acoustic radiating area Sd of the diaphragm is in the range of 0.01 to 0.5 meters.
  13. 13. The method of any preceding claim, wherein the speaker module is a woofer configured to produce sound having frequencies within a bass frequency range, the bass frequency range comprising 60Hz to 80Hz.
  14. 14. A speaker module configured for use in a method according to any one of the preceding claims, The loudspeaker module comprises a loudspeaker frame, a vibrating diaphragm hung on the loudspeaker frame and a driving unit; wherein a partially enclosed volume is formed between the diaphragm, the speaker frame and the rear opening.
  15. 15. A vehicle, comprising: A body having a weight of at least 100kg, wherein the body comprises an airtight surface facing the interior of the vehicle; A speaker module for generating bass frequency sound, wherein the speaker module comprises a speaker frame, a diaphragm suspended on the speaker frame, and a driving unit configured to move the diaphragm to generate sound; Wherein the speaker frame has a rear opening and a partially enclosed volume is formed between the diaphragm, the speaker frame and the rear opening; Wherein the speaker frame is attached to the body to form a sealed volume between the airtight surface of the body, the speaker frame, and the diaphragm; Wherein the partially enclosed volume forms at least a majority of the sealed volume.

Description

Method for manufacturing vehicle, speaker and vehicle Technical Field The present invention relates to a method of manufacturing a vehicle, a speaker module used with the manufacturing method, and a vehicle. Background A typical conventional speaker has a frame, a diaphragm, and a driving unit for reproducing sound. In use, the drive unit moves the diaphragm as a piston back and forth, thereby generating pressure waves, i.e. sound. For audio reproduction in automobiles, low frequency sound is typically generated by a woofer (woofer) mounted in the door of the automobile. This approach may have some advantages, such as a sufficiently large acoustic back volume (acoustic back volume), allowing the design of high efficiency woofers with large radiating surfaces and low resonant frequencies. Furthermore, most automobiles have two or four doors, and typically an equivalent number of woofers is envisioned. With these different sound sources, spatial differences in sound pressure levels can be equalized by gain, filters, and delays, thereby achieving evenly distributed bass at multiple listening positions. However, integrating a low frequency speaker in a vehicle door may also cause some problems. For example, the sound insulation problem of the door may be compromised, which will reduce passenger comfort. In addition, the vibration may cause audible noise or discomfort to an occupant in contact with the door. Some manufacturers have sought solutions to accomplish the generation of low frequency sound by passing it through speakers placed at other locations with sufficient acoustic back volume. WO2007036245 describes a loudspeaker system for a motor vehicle. The speaker system is mounted on a support structure and utilizes a cavity formed in the support structure as an acoustic back cavity volume. The present invention has been devised based on the above-mentioned considerations. Disclosure of Invention WO2007036245 (' 245) describes a loudspeaker system for a motor vehicle that utilizes a cavity formed by a support structure. According to' 245, a loudspeaker for low frequency reproduction requires a relatively large acoustic volume. Thus, the speaker described in' 245 is mounted in a cavity formed in the support structure in order to expand the acoustic volume available to the speaker. Accordingly,' 245 reflects what is considered a common teaching, namely the large volume required to reproduce low frequency sounds, and provides a solution by adding appropriate cavities to the motor vehicle. Contrary to this common teaching, the inventors of the present invention observed that low frequency reproduction does not always require a large cavity to expand the acoustic volume, as long as the speaker is attached to a body of a vehicle that is heavy enough to absorb vibrations generated when the speaker is in operation. According to a first aspect of the present invention, a method for manufacturing a vehicle is provided. The method comprises providing a precursor vehicle, wherein the precursor vehicle comprises a body having a weight of at least 100kg, wherein the body comprises an airtight surface configured to face an interior of a vehicle manufactured by the precursor vehicle, providing a speaker module for generating bass frequency sound, wherein the speaker module comprises a speaker frame, a diaphragm suspended from the speaker frame, and a drive unit configured to move the diaphragm to generate sound, wherein the speaker frame has a rear opening, wherein a partially enclosed volume is formed between the diaphragm, the speaker frame and the rear opening, wherein the method comprises attaching the speaker module to the body to form a sealed volume defined by the airtight surface of the body, the speaker frame and the diaphragm, wherein the partially enclosed volume forms at least a majority of the sealed volume. The speaker module may be operable to energize the drive unit to move the diaphragm relative to the speaker frame along a movement axis of the speaker module to produce sound. The driving unit may include a movable part attached to the diaphragm and a fixed part attached to the speaker frame. The speaker module may be operable to power the drive unit to move the movable part of the drive unit relative to the fixed part thereof. Accordingly, the moving assembly (which may include the movable part of the driving unit and the diaphragm) may be moved along the moving axis of the speaker module to generate sound. The movable component may also be referred to as a "mobile" component. The terms "stationary" and "movable" are relative terms and in principle depend on the particular frame of reference. In this context, the terms "stationary" and "movable" are intended to refer to a conventional frame of reference according to which the diaphragm is considered movable and, in use, moves, while the other components of the speaker module are considered stationary. Thus, those parts of the speaker module that move with