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CN-122029838-A - Transmission device for a structural sound transducer having an excitation unit and a receiving unit, and system for transmitting vibrations

CN122029838ACN 122029838 ACN122029838 ACN 122029838ACN-122029838-A

Abstract

The invention relates to a transmission device (22) of a structural sound transducer (28) for introducing vibrations into a planar body, the structural sound transducer (28) comprising an excitation unit (18) and a receiving unit (20), the transmission device (22) being mountable on the planar body and being in vibratory connection therewith. The transmission device (22) comprises a central region (12) for receiving the receiving unit (20), the central region (12) being provided with at least two arms (14, 16), wherein the arms (14, 16) are arranged in the circumferential direction of the central region (12) and extend radially away from the central region (12), in particular in a strip-like configuration, the central region (12) together with the arms (14, 16) forming the first transmission unit (10). According to the invention, the first transmission unit (10) is configured to be connected to the second transmission unit (24).

Inventors

  • M. BRAND
  • D. Schwersky
  • B. Holmnell

Assignees

  • 施瓦茨有限责任公司

Dates

Publication Date
20260512
Application Date
20241025
Priority Date
20231027

Claims (20)

  1. 1. Transmission (22) of a structural sound transducer (28) for introducing vibrations into a planar body, the structural sound transducer (28) comprising an excitation unit (18) and a receiving unit (20), the transmission (22) being mountable on the planar body and being in vibratory connection therewith, the transmission (22) comprising a central region (12) for receiving the receiving unit (20), the central region (12) being provided with at least two arms (14, 16), the arms (14, 16) being arranged in the circumferential direction of the central region (12) and extending radially away from the central region (12), in particular in a strip-like configuration, the central region (12) and the arms (14, 16) together constituting a first transmission unit (10), characterized in that the first transmission unit (10) is configured to be connected with a second transmission unit (24).
  2. 2. Transmission according to claim 1, characterized in that the second transmission unit (24) can be connected to additional transmission units (10, 24), in particular to additional first transmission units (10), as required.
  3. 3. The transmission according to claim 1 or 2, characterized in that at least one end of the arm (14, 16) of the first transmission unit (10) remote from the central region (12) can be connected to a second transmission unit (24), so that the first transmission unit (10) and the second transmission unit (24) can transmit vibrations generated by the excitation unit (18) to the planar body, at least increasing the transmission region.
  4. 4. The transmission according to any one of the preceding claims, characterized in that the second transmission unit (24) and the additional transmission unit (24) have separate strip-like structures for extending the length of the corresponding arm (14, 16) of the first transmission unit (10).
  5. 5. Transmission according to any one of the preceding claims, characterized in that the transmission is adapted to a structural sound transducer (28) comprising a plurality of excitation units (18) and matching receiving units (20), a plurality of first transmission units (10) being connected to each other being provided.
  6. 6. The transmission according to claim 5, characterized in that the plurality of first transmission units (10) are directly or indirectly connected to each other by means of corresponding second transmission units (24), thereby coupling the plurality of first transmission units (10) to each other.
  7. 7. Transmission according to any one of the preceding claims, wherein the transmission units (10, 24) are connected to each other in a form-fitting, friction-fitting and/or material-fitting manner, in particular in a plug-in manner.
  8. 8. Transmission according to any one of the preceding claims, wherein the first and/or second and/or additional transmission units (10, 24) are of a split design, comprising a support and a reinforcement.
  9. 9. The transmission according to any one of claims 1 to 7, characterized in that the first transmission unit (10) is integrally formed.
  10. 10. Transmission according to claim 8, wherein the reinforcement and the support each have a different stiffness, in particular are made of different materials.
  11. 11. Transmission according to claim 10, wherein the reinforcement is made of a high strength material, in particular a carbon fiber reinforced Composite (CFRP), such as carbon fiber.
  12. 12. The transmission according to claim 10 or 11, characterized in that the support is made of plastic, in particular of a polymer, preferably of polyimide, in particular of polyetherimide, preferably processed using an injection molding process.
  13. 13. Transmission according to any one of the preceding claims, wherein the arms (14, 16) of the first transmission unit (10) are arranged opposite each other in the circumferential direction of the central region (12).
  14. 14. The transmission according to any one of claims 1 to 12, characterized in that the arms (14, 16) of the first transmission unit (10) are arranged asymmetrically or at an angle in the circumferential direction of the central region (12), in particular the angle between the two arms (14, 16) is less than 180 °.
  15. 15. Transmission according to any one of the preceding claims, wherein the arms (14, 16) of the first transmission unit (10) differ from each other in length and/or width.
  16. 16. Transmission according to claim 15, wherein two arms (14, 16) are provided, wherein the ratio of the length of the first arm (14) to the length of the second arm (16) is at least 1:1.1.
  17. 17. System (30) for transmitting vibrations from a structural sound transducer (28) to a planar body, comprising the structural sound transducer (28) and the planar body, wherein the structural sound transducer (28) comprises a transmission device (22) and an excitation unit (18), the excitation unit (18) being configured for detachable connection with a receiving unit (20), wherein the transmission device (22) is provided with a central region (12) for receiving the receiving unit (20) and at least two arms (14, 16), wherein the arms (14, 16) are arranged on a circumferential cloth of the central region (12) and extend radially away from the central region (12), in particular in a strip-like configuration, wherein the central region (12) and the arms (14, 16) together form a first transmission unit (10), characterized in that a plurality of transmission units (10, 24) are provided which are connected to one another.
  18. 18. The system according to claim 17, characterized in that the transmission (22) adopts the structure according to any one of claims 1 to 16.
  19. 19. The system according to claim 17 or 18, characterized in that the excitation unit (18) is connected with the receiving unit (20) by means of a form fit, in particular by means of a bayonet lock.
  20. 20. The system according to any one of claims 17 to 19, characterized in that the receiving unit (20) is integrally formed with a transmission (22), in particular with a support, the receiving unit (20) thus forming part of the transmission.

Description

Transmission device for a structural sound transducer having an excitation unit and a receiving unit, and system for transmitting vibrations Technical Field The invention relates to a transmission device for a structural sound transducer with an excitation unit and a receiving unit of the type described in the preamble of claim 1, and to a system for transmitting vibrations from a structural sound transducer to a planar body of the type described in the preamble of claim 17. Background Structural acoustic transducers are known in the art and generally comprise an excitation unit (exciter) and a receiving unit (snap ring) for the excitation unit. The exciter is a spring-mass system that converts an electrical input signal into a vibratory sound wave. When the exciter is attached to the resonating body, the speaker is formed in the form of an excited sounding body, i.e., a resonating body. The exciter is suitable for music and voice playing. In order to facilitate replacement, the exciter is detachably connected with the clamping ring. The snap ring can transmit vibrations from the exciter to the sounding body without loss. The clasp is typically secured to the sounding body by means of an adhesive or threaded connection. The disadvantage is that the production and manufacture are very time-consuming and the difficulty of mass production increases. German patent DE 10201001778 B4 discloses a transmission device for a structural sound transducer, which has a plurality of arms connected to a central region, wherein at least one arm is connected to the central region by a connection. The design of the flat arm is used for improving the restoration quality of the audio signal, and especially optimizing the sound quality. In this patent, the transmission is made of a high strength material, in particular carbon fiber reinforced Composite (CFRP), i.e. a carbon fiber material. However, such materials are very expensive due to the very complex manufacturing. The greater the number of arms, the higher the production investment and therefore the corresponding costs. To achieve a high quality reproduction of the audio signal, the transmission requires a large amount of material. The substantial rigidity of the transmission is a precondition for ensuring a high quality audio signal. Furthermore, limited by material properties, the transfer area required to obtain a high quality audio signal is often limited. Disclosure of Invention The object of the invention is to improve the transmission of a structural sound transducer such that the layout of the required transmission area can be configured as desired. The transmission device can also save high-price raw materials and corresponding production cost and investment, and realize high-quality restoration of audio signals in a large range. According to a first aspect of the invention, this object is achieved by the characterizing features of claim 1 in combination with the features of the preamble thereof. Further developments of the invention are defined in the dependent claims. The invention is based on the recognition that a modular system of transmission units, on the one hand, allows easy connection of the coupling surfaces of the transmission to the planar body and, on the other hand, allows flexible configuration of the number of excitation units and their strength required for generating the necessary sound waves, so that the transmission and the structural sound transducer are designed as desired. Accordingly, in a first aspect the present invention provides a transmission device for a structural acoustic transducer having an excitation unit and a receiving unit for introducing vibrations into a planar body, the transmission device being mountable on and in vibratory connection with the planar body. The transmission is provided with a central area for receiving the receiving unit, the central area being provided with at least two arms. The arms are arranged in the circumferential direction of the central region and extend radially away from the central region, in particular in a rail-like, strip-like or similar elongated configuration. The central region and the arms together form a first transmission unit. According to the invention, the first transmission unit is connected (in particular optionally) to the second transmission unit. Connecting multiple drive units can cover a larger transfer area than the surface area of the planar body. Preferably, the second transmission unit can be connected as desired to additional transmission units, in particular to the first transmission unit, whereby the number of excitation units in the structural sound transducer can be easily increased, which facilitates the adjustment of the vibration intensity required for the sound waves to be generated. Preferably, at least one end of the arm of the first transmission unit remote from the central region is connectable to the second transmission unit, enabling the first and second tr