Vibration reduction support used for being connected with automobile sound production device
By designing a vibration damping bracket, and utilizing a combination of overlapping welding of bracket units and reinforcing plate positioning columns, the problem of floor and accelerator pedal vibration caused by the vibration of the car's sound system was solved, achieving efficient vibration damping, stable connection, and lightweight design.
Patent Information
- Application Number
- CN202520477383.5
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-03-18
- Publication Date
- 2026-02-24
- Estimated Expiration
- 2035-03-18
AI Technical Summary
In existing technologies, the vibration of the floor and accelerator pedal caused by the operation of automotive sound devices seriously affects the driving experience, and traditional solutions result in increased weight and high mold costs.
A vibration damping bracket is designed, which is composed of multiple bracket units with the same structure that are sequentially overlapped and welded together. Combined with reinforcing plates and positioning columns, it achieves layer-by-layer attenuation of vibration and stable connection, thereby enhancing the connection strength and stability between the bracket and the front crossbeam of the car.
It improves vibration damping, simplifies the installation process, enhances the stability and safety of the connection, reduces potential risks caused by loosening or failure, reduces weight, and lowers mold costs.
Smart Images

Figure CN223934611U_ABST
Abstract
Description
Technical Field
[0001] This application relates to the field of automotive vibration damping technology, and more specifically, to a vibration damping bracket for connecting automotive sound-generating devices. Background Technology
[0002] As customers demand higher levels of comfort from vehicle noise and vibration, the performance of major noise and vibration sources has been effectively improved, and in-vehicle noise has been greatly reduced. However, the vibration of the floor and accelerator pedal caused by the operation of generating devices (such as car horns) seriously affects the driving and riding experience of drivers and passengers.
[0003] Currently, the common solutions to the problem of floor and accelerator pedal vibration caused by the operation of the device are to increase the thickness of the body sheet metal and strengthen the structure of the body mounting points. However, these solutions will increase the weight, and the body sheet metal repair cycle is long, resulting in huge mold costs. Utility Model Content
[0004] This application aims to address at least one of the technical problems existing in the prior art or related technologies.
[0005] Therefore, the first aspect of this application is to provide a vibration damping bracket for connecting a car sound-generating device.
[0006] In view of this, according to the first aspect of this application, a vibration damping bracket for connecting an automotive sound system is provided, comprising:
[0007] The support body is composed of multiple support units with the same structure that are sequentially overlapped and welded together.
[0008] A reinforcing piece is disposed on the surface of one end of the support body, and the reinforcing piece is fixedly connected to the outermost support unit located in the support body;
[0009] A positioning post is disposed on the surface of the bracket body, and the positioning post is fixedly connected to the bracket unit with the reinforcing plate.
[0010] During installation, one end of the bracket body with a reinforcing plate is used for fixed connection with the front crossbeam of the vehicle, and the reinforcing plate is located between the bracket body and the front crossbeam of the vehicle; the end of the bracket body away from the reinforcing plate is used for fixed connection with the vehicle's sound-generating device; the positioning post is used to be engaged in the positioning hole of the front crossbeam of the vehicle.
[0011] In one possible technical solution, the bracket unit is further provided with a first connecting hole and a second connecting hole at both ends; the first connecting hole is used for the fixed connection between the bracket body and the front crossbeam of the car; the second connecting hole is used for the fixed connection between the bracket body and the car sound-generating device.
[0012] In one possible technical solution, the reinforcing plate is further provided with a third connecting hole, which coincides with the position of the first connecting hole; the third connecting hole is used for the fixed connection between the reinforcing plate and the front crossbeam of the vehicle.
[0013] In one possible technical solution, the number of the stent units is further divided into two or three.
[0014] In one possible technical solution, when the number of stent units is 2, the thickness of the stent unit is 0.80 mm, and when the number of stent units is 3, the thickness of the stent unit is 0.53 mm.
[0015] In one possible technical solution, the bracket unit further includes a vertical portion and a bent portion; the vertical portion and the bent portion are fixedly connected; the first connecting hole is provided on the vertical portion, and the second connecting hole is provided on the bent portion.
[0016] In one possible technical solution, after the vibration damping bracket is installed, the vertical part is perpendicular to the vehicle chassis; the angle between the bent part and the chassis is 60°-65°.
[0017] In one possible technical solution, a vibration damping coating is further provided on the overlapping contact surfaces between multiple bracket units.
[0018] In one possible technical solution, the support unit is further made of carbon manganese spring steel, and the reinforcing sheet is made of cold-rolled low-carbon steel.
[0019] In one possible technical solution, the thickness of the reinforcing sheet is further 0.8 mm.
[0020] In one possible technical solution, the length of the single support unit is further 140mm-160mm.
[0021] According to the present application, a vibration damping bracket for connecting an automotive sound generator is provided. This bracket is primarily designed to enhance vibration damping. Firstly, the bracket body is constructed by sequentially overlapping and welding multiple identical bracket units. This design not only ensures a tight connection between the individual bracket units through welding, but also, through the sequential connection of these overlapping bracket units, creates a layered attenuation effect on vibrations from the sound generator, thereby improving the vibration damping effect. A reinforcing plate 2 is disposed on the surface of one end of the bracket body and is fixedly connected to one of the bracket units at the edge of the bracket body (i.e., after the vibration damping device is installed). The support unit is the one closest to the front crossbeam of the car. On one hand, the reinforcing plate increases the strength and stability of the connection between the support and the front crossbeam, preventing connection failure due to vibration or external impact. On the other hand, the reinforcing plate also attenuates vibrations from the support unit itself. Positioning posts are set on the surface of the support unit and fixedly connected to the support unit with the reinforcing plate. During installation, the positioning posts are used to engage with the positioning holes in the front crossbeam, ensuring accurate installation of the shock absorber bracket and preventing displacement during vehicle operation, further improving connection stability and safety. During installation, the end of the support unit with the reinforcing plate is fixedly connected to the front crossbeam of the car. The reinforcing plate, located between the support unit and the front crossbeam, enhances the connection strength between the front crossbeam and the shock absorber bracket, and attenuates (disperses stress) vibrations from the support unit. The end of the support unit furthest from the reinforcing plate is fixedly connected to the car's sound system, thus achieving a stable connection between the sound system and the front of the car.
[0022] Compared with the prior art, this application has the following technical effects:
[0023] (1) The support body is formed by overlapping and welding multiple support units with the same structure in sequence. The vibration generated by the generating device is gradually attenuated by multiple support units, thereby improving the vibration reduction effect of the vibration damping support.
[0024] (2) By setting a reinforcing plate between the bracket body and the front crossbeam of the car, on the one hand, it can strengthen the connection between the bracket body and the front crossbeam of the car, and on the other hand, it can attenuate the vibration from the bracket body, further improving the vibration reduction effect of the shock absorber bracket.
[0025] (3) The design of the positioning post allows the bracket to be quickly and accurately positioned in the positioning hole of the front crossbeam of the car during installation, simplifying the installation process. At the same time, the clear structure and easy disassembly of the bracket also facilitate subsequent maintenance and replacement.
[0026] (4) The solid connection and enhanced shock absorption together improve the safety of the car during driving and reduce the potential risks caused by loose or malfunctioning sound-generating devices.
[0027] Additional aspects and advantages of this application will become apparent in the following description or may be learned by practice of this application. Attached Figure Description
[0028] The above and / or additional aspects and advantages of this application will become apparent and readily understood from the description of the embodiments taken in conjunction with the following drawings, in which:
[0029] Figure 1 A schematic diagram of a vibration damping bracket for connecting an automotive sound device is shown in Embodiment 1 of an embodiment of this application;
[0030] Figure 2 This illustration shows a schematic diagram of the support body structure of a vibration damping bracket for connecting an automotive sound device, according to Embodiment 1 of this application.
[0031] Figure 3 A schematic diagram of the body unit structure of a vibration damping bracket for connecting an automotive sound device is shown in Embodiment 1 of an embodiment of this application;
[0032] Figure 4 A schematic diagram of a vibration damping bracket for connecting an automotive sound device is shown in Embodiment 2 of one embodiment of this application;
[0033] Figure 5 A schematic diagram of the bracket body structure for connecting a vibration damping bracket for an automobile sound device is shown in Embodiment 2 of one embodiment of this application;
[0034] Figure 6 A schematic diagram of the main body unit structure of a vibration damping bracket for connecting an automotive sound device is shown in Embodiment 2 of one embodiment of this application;
[0035] in, Figures 1 to 6 The correspondence between the reference numerals and component names in the attached drawings is as follows:
[0036] 1. Support body; 11. Body unit; 12. First connecting hole; 13. Second connecting hole; 111. Vertical part; 112. Bending part;
[0037] 2. Reinforcing plate; 21. Third connecting hole;
[0038] 3. Positioning post. Detailed Implementation
[0039] To better understand the above-mentioned objectives, features, and advantages of this application, the application will be further described in detail below with reference to the accompanying drawings and specific embodiments. It should be noted that, unless otherwise specified, the embodiments and features described in these embodiments can be combined with each other.
[0040] Many specific details are set forth in the following description in order to provide a full understanding of this application. However, this application may also be implemented in other ways different from those described herein. Therefore, the scope of protection of this application is not limited to the specific embodiments disclosed below.
[0041] The following reference Figures 1 to 6 This application describes a vibration damping bracket for connecting a car audio device, according to some embodiments thereof.
[0042] Example 1
[0043] See Figure 1 , Figure 2 and Figure 3 As shown, a vibration damping bracket for connecting a car sound system includes a bracket body 1, a reinforcing plate 2, and a positioning post 3. The bracket body 1 is constructed by sequentially overlapping and welding multiple bracket units 11 with the same structure. The reinforcing plate 2 is disposed on the surface of one end of the bracket body 1 and is fixedly connected to the outermost bracket unit 11 located within the bracket body 1. The positioning post 3 is disposed on the surface of the bracket body 1 and is fixedly connected to the bracket unit 11 with the reinforcing plate. During installation, the end of the bracket body 1 with the reinforcing plate 2 is fixedly connected to the front crossbeam of the car, with the reinforcing plate 2 located between the bracket body 1 and the front crossbeam. The end of the bracket body 1 away from the reinforcing plate 2 is fixedly connected to the car sound system. The positioning post 3 is used to engage with the positioning hole in the front crossbeam of the car.
[0044] Furthermore, the vibration damping bracket for connecting the automotive sound-generating device is primarily designed to enhance vibration damping. Firstly, the bracket body 1 is constructed by sequentially overlapping and welding multiple identical bracket units 11. This design not only ensures a tight connection between the individual bracket units 11 through welding, but also, by having multiple bracket units 11 overlap and connect sequentially, creates a layered attenuation effect on vibrations from the sound-generating device, thus improving vibration damping. The reinforcing plate 2 is positioned on the surface of one end of the bracket body and is fixedly connected to one of the bracket units 11 at the edge of the bracket body 1 (i.e., the bracket unit closest to the vehicle after the vibration damping device is installed). The front crossbeam of the vehicle has a support unit 11. On one hand, the reinforcing plate 2 can increase the strength and stability of the connection between the support and the front crossbeam of the vehicle, preventing connection failure due to vibration or external impact. On the other hand, the reinforcing plate 2 can also attenuate the vibration from the support body 1. The positioning post 3 is set on the surface of the support body 1 and fixedly connected to the support unit 11 with the reinforcing plate 2. During installation, the positioning post 3 is used to lock into the positioning hole of the front crossbeam of the vehicle. This not only ensures the accurate installation of the shock absorber support, but also prevents the shock absorber support from shifting during vehicle operation, further improving the stability and safety of the connection. During installation, the end of the support body 1 with the reinforcing plate 2 is fixedly connected to the front crossbeam of the vehicle. The reinforcing plate is located between the support body and the front crossbeam of the vehicle. On the one hand, it enhances the connection strength between the front crossbeam of the vehicle and the shock absorber support. On the other hand, it attenuates the vibration from the support body 1 (that is, it disperses the stress generated by the vibration of the sound-generating device). The end of the support body 1 away from the reinforcing plate 2 is used to fixally connect to the vehicle's sound-generating device, thereby achieving a stable connection between the sound-generating device and the front of the vehicle.
[0045] It should be noted that the bracket unit 11 is provided with a first connecting hole 12 and a second connecting hole 13 at both ends; the first connecting hole 12 is used for the fixed connection between the bracket body 1 and the front crossbeam of the car; the second connecting hole 13 is used for the fixed connection between the bracket body 1 and the car sound device; the reinforcing plate 2 is provided with a third connecting hole 21, which coincides with the position of the first connecting hole 12; the third connecting hole 21 is used for the fixed connection between the reinforcing plate 2 and the front crossbeam of the car.
[0046] Furthermore, the first connecting hole 12 is located at the end of the bracket unit near the reinforcing plate 2, and is used for the fixed connection between the bracket body 1 and the front crossbeam of the vehicle; the third connecting hole 21 coincides with the first connecting hole 12, together forming the connection point between the bracket body 1 and the front crossbeam of the vehicle; during installation, fasteners (such as bolts) will pass through both the third connecting hole 21 and the first connecting hole 12, firmly connecting the reinforcing plate 2, the bracket body 1, and the front crossbeam of the vehicle together. This design not only enhances the strength of the connection, but also disperses the stress in the connection area, improving the overall shock absorption effect, stability, and durability; the second connecting hole 13 is located at the end of the bracket unit 11 away from the reinforcing plate 2, and is used for the fixed connection between the bracket body 1 and the vehicle sound device. Similarly, during installation, fasteners are used to pass through the second connecting hole to fix the sound device to the bracket body 1; this design ensures that the sound device can be stably installed on the vehicle.
[0047] It should be noted that the number of stent units 11 is 2 or 3.
[0048] Furthermore, in this embodiment, there are two bracket units 11. The vibration from the sound-generating device is gradually reduced by the two bracket units 11, thus providing the vibration reduction effect of the vibration damping bracket.
[0049] It should be noted that when there are 2 stent units 11, the thickness of stent unit 11 is 0.80mm, and when there are 3 stent units 11, the thickness of stent unit 11 is 0.53mm.
[0050] Furthermore, in this embodiment, there are two bracket units 11, so the thickness of a single bracket unit 11 in this embodiment is 0.80mm. By precisely controlling the thickness of the bracket unit, the weight of the bracket can be reduced to the maximum extent while ensuring structural strength. This is crucial for improving the range of the vehicle.
[0051] It should be noted that a vibration damping coating is provided on the overlapping contact surfaces between multiple support units 11.
[0052] Furthermore, when the support units 11 overlap and are in close contact, the damping coating can fill the tiny gaps between the contact surfaces, forming a continuous and flexible connection layer. This connection layer can effectively absorb and disperse vibration energy, thereby reducing the transmission of vibration between the support units 11 and improving the vibration damping effect of the support units 11.
[0053] It should be noted that the bracket unit 11 is made of carbon manganese spring steel, and the reinforcing plate 2 is made of cold-rolled low-carbon steel.
[0054] Furthermore, the support unit 11 made of carbon manganese spring steel has high strength and elasticity, and can withstand large vibrations and loads, while the reinforcing sheet made of cold-rolled low carbon steel can further enhance the strength and stability of the vibration damping support; the good machinability of cold-rolled low carbon steel makes the reinforcing sheet 2 easy to process into the required shape, thereby simplifying the production process.
[0055] It should be noted that the thickness of reinforcing sheet 2 is 0.8mm.
[0056] Furthermore, a thickness of 0.8 mm is a size that ensures sufficient strength while being relatively thin and light for cold-rolled low-carbon steel; this thickness allows the reinforcing sheet 2 to attenuate vibrations from the support body 1, resist deformation and fracture, and reduce the overall weight of the support.
[0057] It should be noted that the length of the support unit 11 is 140mm-160mm.
[0058] Furthermore, in this embodiment, the length of the bracket unit 11 is 150mm; by precisely controlling the length of the bracket unit, the weight of the bracket can be reduced to the maximum extent while ensuring structural strength; this is crucial for improving the vehicle's range.
[0059] According to an embodiment of a vibration damping bracket for connecting a car sound-generating device, firstly, the positioning post 3 is aligned with the positioning hole on the front crossbeam of the car and inserted into the positioning hole. Then, fasteners (such as bolts) are simultaneously passed through the third connecting hole 21 and the first connecting hole 12 to firmly connect the reinforcing plate 2, the bracket body 1, and the front crossbeam of the car together. Next, fasteners are passed through the second connecting hole to fix the sound-generating device to the bracket body 1. The installation of the vibration damping bracket of this embodiment is completed. When the sound-generating device emits sound and vibrates, the vibration first passes through the bracket body 1. Through the overlapping of multiple bracket units 11 within the bracket body 1, the sequentially connected bracket units 11 form a layer-by-layer attenuation effect on the vibration from the sound-generating device, greatly reducing the vibration transmitted to the reinforcing plate 2. Subsequently, the reinforcing plate 2 further attenuates the vibration from the bracket body 1, thereby attenuating the vibration transmitted to the front crossbeam of the car. Through the overlapping of multiple bracket units 11 and the arrangement of the reinforcing plate 2, the vibration from the sound-generating mechanism is attenuated step by step, thereby greatly weakening the vibration transmitted to the front crossbeam of the car.
[0060] Example 2
[0061] See Figure 4 , Figure 5 and Figure 6As shown, a vibration damping bracket for connecting a car sound system includes a bracket body 1, a reinforcing plate 2, and a positioning post 3. The bracket body 1 is constructed by sequentially overlapping and welding multiple bracket units 11 with the same structure. The reinforcing plate 2 is disposed on the surface of one end of the bracket body 1 and is fixedly connected to the outermost bracket unit 11 located within the bracket body 1. The positioning post 3 is disposed on the surface of the bracket body 1 and is fixedly connected to the bracket unit 11 with the reinforcing plate. During installation, the end of the bracket body 1 with the reinforcing plate 2 is fixedly connected to the front crossbeam of the car, with the reinforcing plate 2 located between the bracket body 1 and the front crossbeam. The end of the bracket body 1 away from the reinforcing plate 2 is fixedly connected to the car sound system. The positioning post 3 is used to engage with the positioning hole in the front crossbeam of the car.
[0062] It should be noted that the bracket unit 11 is provided with a first connecting hole 12 and a second connecting hole 13 at both ends; the first connecting hole 12 is used for the fixed connection between the bracket body 1 and the front crossbeam of the car; the second connecting hole 13 is used for the fixed connection between the bracket body 1 and the car sound device; the reinforcing plate 2 is provided with a third connecting hole 21, which coincides with the position of the first connecting hole 12; the third connecting hole 21 is used for the fixed connection between the reinforcing plate 2 and the front crossbeam of the car.
[0063] It should be noted that the number of stent units 11 is 2 or 3.
[0064] Furthermore, in this embodiment, the number of stent units 11 is two.
[0065] It should be noted that when there are 2 stent units 11, the thickness of stent unit 11 is 0.80mm, and when there are 3 stent units 11, the thickness of stent unit 11 is 0.53mm.
[0066] Furthermore, in this embodiment, there are two support units 11, so the thickness of a single support unit 11 in this embodiment is 0.80mm.
[0067] It should be noted that the bracket unit 11 includes a vertical part 111 and a bent part 112; the vertical part 111 and the bent part 112 are fixedly connected; the first connecting hole 12 is provided on the vertical part 111 and the second connecting hole 13 is provided on the bent part 112.
[0068] It should be noted that after the vibration damping bracket is installed, the vertical part 111 is perpendicular to the car chassis; the angle between the bent part 112 and the chassis is 60°-65°.
[0069] Furthermore, in this embodiment, the angle between the bent portion 112 and the chassis is 65°.
[0070] It should be noted that a vibration damping coating is provided on the overlapping contact surfaces between multiple support units 11.
[0071] It should be noted that the bracket unit 11 is made of carbon manganese spring steel, and the reinforcing plate 2 is made of cold-rolled low-carbon steel.
[0072] It should be noted that the thickness of reinforcing sheet 2 is 0.8mm.
[0073] It should be noted that the length of the support unit 11 is 140mm-160mm.
[0074] Furthermore, in this embodiment, the length of the bracket unit 11 is 150mm, that is, the total length of the vertical part 111 and the bent part 112 is 150mm.
[0075] According to this embodiment, a vibration damping bracket for connecting a car sound device differs from the vibration damping bracket for connecting a car sound device in Embodiment 1 in that the bracket unit 11 in this embodiment is provided with a vertical part 111 and a bent part 112. The vertical part 111 and the bent part 112 are provided to take into account the internal structural design of some vehicles, so that the bracket unit 11 must be bent in order to be properly installed on the vehicle. The other structures are the same as in Embodiment 1, so it has all the beneficial effects of the vibration damping bracket for connecting a car sound device in Embodiment 1, which will not be described in detail here.
[0076] In this application, the term "multiple" refers to two or more unless otherwise expressly defined. The terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, "connection" can be a fixed connection, a detachable connection, or an integral connection; "linking" can be a direct connection or an indirect connection through an intermediate medium. Those skilled in the art can understand the specific meaning of the above terms in this application based on the specific circumstances.
[0077] In the description of this specification, the terms "one embodiment," "some embodiments," "specific embodiment," etc., refer to a specific feature, structure, material, or characteristic described in connection with that embodiment or example, which is included in at least one embodiment or example of this application. In this specification, the illustrative expressions of the above terms do not necessarily refer to the same embodiment or example. Furthermore, the specific features, structures, materials, or characteristics described may be combined in any suitable manner in one or more embodiments or examples.
[0078] The above description is merely a preferred embodiment of this application and is not intended to limit this application. Various modifications and variations can be made to this application by those skilled in the art. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of this application should be included within the protection scope of this application.
Claims
1. A vibration damping bracket for connecting a car sound system, characterized in that, include: The support body (1) is composed of multiple support units (11) with the same structure, which are stacked and welded in sequence; A reinforcing piece (2) is disposed on the surface of one end of the support body (1), and the reinforcing piece (2) is fixedly connected to one of the outermost support units (11) located in the support body (1); A positioning post (3) is disposed on the surface of the bracket body (1), and the positioning post (3) is fixedly connected to the bracket unit (11) provided with the reinforcing plate; During installation, one end of the bracket body (1) with a reinforcing plate (2) is used to be fixedly connected to the front crossbeam of the car, and the reinforcing plate (2) is located between the bracket body (1) and the front crossbeam of the car; the end of the bracket body (1) away from the reinforcing plate (2) is used to be fixedly connected to the car sound-generating device; the positioning post (3) is used to be locked in the positioning hole of the front crossbeam of the car.
2. A vibration damping bracket for connecting an automotive sound system according to claim 1, characterized in that, The bracket unit (11) is provided with a first connecting hole (12) and a second connecting hole (13) at both ends; the first connecting hole (12) is used for the fixed connection between the bracket body (1) and the front crossbeam of the car; the second connecting hole (13) is used for the fixed connection between the bracket body (1) and the car sound-generating device. The reinforcing plate (2) is provided with a third connecting hole (21), which coincides with the position of the first connecting hole (12); the third connecting hole (21) is used for the fixed connection between the reinforcing plate (2) and the front crossbeam of the vehicle.
3. A vibration damping bracket for connecting an automotive sound system according to claim 2, characterized in that, The number of the stent units (11) is 2 or 3.
4. A vibration damping bracket for connecting an automotive sound system according to claim 3, characterized in that, When there are 2 stent units (11), the thickness of the stent unit (11) is 0.80 mm. When there are 3 stent units (11), the thickness of the stent unit (11) is 0.53 mm.
5. A vibration damping bracket for connecting an automotive sound system according to claim 4, characterized in that, The bracket unit (11) includes a vertical part (111) and a bent part (112); the vertical part (111) and the bent part (112) are fixedly connected; the first connecting hole (12) is provided on the vertical part (111) and the second connecting hole (13) is provided on the bent part (112).
6. A vibration damping bracket for connecting an automotive sound system according to claim 5, characterized in that, After the vibration damping bracket is installed, the vertical part (111) is perpendicular to the vehicle chassis; the angle between the bent part (112) and the chassis is 60°-65°.
7. A vibration damping bracket for connecting an automotive sound-generating device according to claim 4 or 6, characterized in that, A vibration damping coating is provided on the overlapping contact surfaces between multiple bracket units (11).
8. A vibration damping bracket for connecting an automotive sound system according to claim 7, characterized in that, The bracket unit (11) is made of carbon manganese spring steel, and the reinforcing sheet (2) is made of cold-rolled low-carbon steel.
9. A vibration damping bracket for connecting an automotive sound system according to claim 8, characterized in that, The thickness of the reinforcing sheet (2) is 0.8 mm.
10. A vibration damping bracket for connecting an automotive sound system according to claim 9, characterized in that, The length of the support unit (11) is 140mm-160mm.