Waveguide tube and sound box comprising same
By incorporating a flow divider and a flow guide block within the waveguide, the problem of excessive waveguide size was solved, resulting in a compact speaker structure and reduced production costs.
Patent Information
- Application Number
- CN202422693574.3
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2024-11-05
- Publication Date
- 2025-12-12
- Estimated Expiration
- 2034-11-05
AI Technical Summary
Existing waveguides are bulky while still providing parallel waveform output, making them unsuitable for speaker cabinets with limited internal space and increasing production costs.
By setting a flow divider inside the waveguide to divide the chamber into two channels, and setting a flow guide block in the channel, the sound waves are guided by the flow guide block of the channel and the flow guide block of the flow divider, so as to achieve faster sound wave shaping and reduce the length of the waveguide.
It achieves a reduction in waveguide volume and manufacturing materials while meeting the requirements for parallel waveform output, resulting in a more compact internal speaker structure and reduced impact on sound quality.
Smart Images
Figure CN223666421U_ABST
Abstract
Description
TECHNICAL FIELD
[0001] The present application relates to the field of sound diffusion, in particular to a waveguide tube and a sound box comprising the same. BACKGROUND
[0002] When a sound box loudspeaker sounds, the sound will spread around the sounding component. In order to guide the sound wave to the front of the sound box as much as possible, a guiding device called waveguide tube is generally arranged in the sound box. The two ends of the waveguide tube are throat and mouth respectively, the throat is connected with the loudspeaker, and the mouth is installed at the position of the final sound emission of the sound box. In the process of the sound wave moving from the throat to the mouth inside the waveguide tube, the sound wave is reflected in the waveguide tube, and finally the originally spherical wave shape is converted into a plane wave shape.
[0003] In the existing waveguide tube, in order to make the direction of the final sound wave as parallel as possible, the length of the waveguide tube is generally designed to be longer so that the sound has more reflection times therein, but thereby the volume of the waveguide tube is larger and cannot be applied to the sound box structure with compact internal space, and also increases the production cost of the waveguide tube. Therefore, how to reduce the volume of the waveguide tube under the premise of meeting the output of parallel wave shape is a problem to be solved at present. SUMMARY
[0004] The present application aims to at least solve one of the problems existing in the prior art. To this end, the present application proposes a waveguide tube which can convert the spherical sound wave emitted by the loudspeaker into parallel sound wave, and has a more compact structure compared with the transmission waveguide tube.
[0005] The present application also proposes a sound box having the above waveguide tube.
[0006] The waveguide tube according to the first aspect of the present application comprises:
[0007] a waveguide tube body, two ends of the waveguide tube body are respectively provided with an inlet and an outlet, and a cavity is arranged inside the waveguide tube body and communicated with the inlet and the outlet;
[0008] a flow dividing member, the flow dividing member is installed in the cavity, and two ends of the flow dividing member respectively extend to the inlet and the outlet to divide the cavity into two symmetrical channels;
[0009] a flow guiding block, the flow guiding block is arranged in the channel, the flow guiding block is in the shape of a water droplet and guides the sound wave in the channel to the outlet.
[0010] The waveguide according to the embodiments of the present application has at least the following beneficial effects: the waveguide separates the internal cavity of the waveguide body into two channels by the flow divider to guide the sound waves, and the flow guide block is arranged in the channel to guide the sound waves inside, so that the sound waves are shaped faster, thereby reducing the length of the waveguide to reduce the volume and production materials.
[0011] According to some embodiments of the present application, the cavity comprises a first section and a second section connected to each other, an end of the first section is connected to the sound inlet, an end of the second section is connected to the sound outlet, and the inner diameters of the first section and the second section gradually increase along the sound wave propagation direction.
[0012] According to some embodiments of the present application, the inner walls of the first section and the second section are both flat surfaces.
[0013] According to some embodiments of the present application, the flow divider comprises a wave-approaching part located at the first section and a wave-guiding part located at the second section, the wave-approaching part has a triangular cross section and both sides are flat surfaces, and both sides of the wave-guiding part are concave arc surfaces, and the width of the wave-guiding part gradually decreases along the sound wave propagation direction.
[0014] According to some embodiments of the present application, the flow guide block is arranged at the junction of the first section and the second section, and the flow guide block is located at the part of the second section close to the flow divider for guiding the sound waves to the recess of the wave-guiding part.
[0015] According to some embodiments of the present application, one end of the flow guide block close to the sound inlet is a first end, a region in the channel from the sound inlet to the first end of the flow guide block is a first region, and the cross-sectional area of the first region satisfies the relationship Sx1(x) = 0.018270x + 0.89447, where x is the percentage of the distance from the sound inlet to the current position to the total length of the cavity.
[0016] According to some embodiments of the present application, a region in the channel from one end of the flow guide block to the other end is a second region, and the cross-sectional area of the second region satisfies the relationship Sx2(x) = 0.0039735x2-0.2825x+6.0058, where x is the percentage of the distance from the sound inlet to the current position to the total length of the cavity.
[0017] According to some embodiments of the present application, the sound guide block has a second end close to one end of the sound outlet, and a third region in the channel from the second end of the sound guide block to the sound outlet, the cross-sectional area of the third region satisfies the relationship Sx3(x) = 3.2585e-06x3-0.00089707x2+0.078586x-1.0759, where x is the distance from the sound inlet to the current position and the percentage of the total length of the chamber.
[0018] According to some embodiments of the present application, the sound inlet is circular in shape, and the sound outlet is rectangular in shape.
[0019] The loudspeaker according to the second aspect of the present application comprises a loudspeaker and the above-mentioned waveguide, and the loudspeaker is connected to the sound inlet of the waveguide.
[0020] The loudspeaker according to the embodiments of the present application has at least the following beneficial effects: by using the waveguide, the internal structure of the loudspeaker can be more compact, and the influence on the sound quality after the volume contraction is reduced, thereby meeting more diversified market demands.
[0021] Additional aspects and advantages of the present application will be given, partially in the following description, partially become obvious from the following description, or be understood by practice of the present application. BRIEF DESCRIPTION OF DRAWINGS
[0022] The present application will be further described below in conjunction with the drawings and embodiments, in which:
[0023] Figure 1 FIG. 1 is a three-dimensional view of the loudspeaker according to the embodiments of the present application;
[0024] Figure 2 FIG. 2 is a sectional view of the loudspeaker according to the embodiments of the present application;
[0025] Figure 3 FIG. 3 is a sectional view of the waveguide according to the embodiments of the present application;
[0026] Figure 4 FIG. 4 is a schematic diagram of the division of the first region 133, the second region 134 and the third region 135 in the waveguide according to the embodiments of the present application;
[0027] Figure 5 FIG. 5 is a graph of the cross-sectional area variation in the first region 133 in the waveguide according to the embodiments of the present application;
[0028] Figure 6 FIG. 6 is a graph of the cross-sectional area variation in the second region 134 in the waveguide according to the embodiments of the present application;
[0029] Figure 7 FIG. 7 is a graph of the cross-sectional area variation in the third region 135 in the waveguide according to the embodiments of the present application;
[0030] Figure 8 This is the output acoustic waveform of the waveguide in an embodiment of the present invention.
[0031] Reference numerals: 100-waveguide body, 110-sound inlet, 120-sound outlet, 130-channel, 131-first section, 132-second section, 133-first region, 134-second region, 135-third region, 200-splitter, 210-wave-facing section, 220-waveguide section, 300-guide block, 310-first end, 320-second end, 400-speaker. Detailed Implementation
[0032] Embodiments of the present invention are described in detail below. Examples of these embodiments are shown in the accompanying drawings, wherein the same or similar reference numerals denote the same or similar elements or elements having the same or similar functions throughout. The embodiments described below with reference to the accompanying drawings are exemplary and are only used to explain the present invention, and should not be construed as limiting the present invention.
[0033] In the description of this invention, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., are based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this invention and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limiting this invention.
[0034] In the description of this invention, "several" means one or more, "multiple" means two or more, "greater than," "less than," and "exceeding" are understood to exclude the stated number, while "above," "below," and "within" are understood to include the stated number. The use of "first" and "second" in the description is merely for distinguishing technical features and should not be construed as indicating or implying relative importance, or implicitly indicating the number of indicated technical features, or implicitly indicating the order of the indicated technical features.
[0035] In the description of this invention, unless otherwise explicitly defined, terms such as "set up," "install," and "connect" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this invention in conjunction with the specific content of the technical solution.
[0036] In the description of this invention, the terms "one embodiment," "some embodiments," "illustrative embodiment," "example," "specific example," or "some examples," etc., refer to specific features, structures, materials, or characteristics described in connection with that embodiment or example, which are included in at least one embodiment or example of the invention. 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.
[0037] When a speaker emits sound, the sound diffuses outwards from the emitting component. To guide the sound waves as far forward as possible, a guiding device called a waveguide is typically installed inside the speaker enclosure. The two ends of the waveguide are a throat and an opening; the throat connects to the speaker, and the opening is installed at the final sound-emitting position within the enclosure. As the sound waves travel along the inside of the waveguide from the throat to the opening, they are reflected within the waveguide, ultimately transforming the originally spherically diffused waveform into a planar waveform.
[0038] In existing waveguides, to ensure the final sound wave is as parallel as possible, the waveguide is generally designed to be quite long, allowing for more reflections. However, this results in a large waveguide size, making it unsuitable for speaker enclosures with limited internal space, and also increases production costs. Therefore, reducing the size of the waveguide while still achieving a parallel output waveform is a pressing issue that needs to be addressed.
[0039] In response, this application proposes a waveguide that divides the internal chamber of the waveguide body 100 into two channels 130 by a diverter 200 to guide sound waves, and provides a guide block 300 in the channel 130 to guide the sound waves located inside, so that the sound waves are shaped more quickly, thereby reducing the length of the waveguide to reduce volume and production materials.
[0040] This application also proposes a speaker including the above waveguide. By using this waveguide, the internal structure of the speaker can be more compact, and the impact of volume reduction on sound quality can be reduced, thereby meeting more diverse market demands.
[0041] Reference Figure 1 and Figure 2 This waveguide includes a waveguide body 100, a flow divider 200, and a flow guide block 300. The waveguide body 100 is the main structure of the waveguide, supporting other components and containing a chamber to guide sound waves. Both the flow divider 200 and the flow guide block 300 are disposed within the chamber of the waveguide body 100. The flow divider 200 divides the chamber into channels for finer adjustment of the sound waves, while the flow guide block 300 is disposed within the channels to shape the sound waves located in the center.
[0042] Specifically, refer to Figure 3 The waveguide body 100 has a sound inlet 110 and a sound outlet 120 at its two ends, respectively. The sound inlet 110 is circular, and the sound outlet 120 is rectangular. The waveguide body 100 has a cavity inside that connects to the sound inlet 110 and the sound outlet 120. Thus, after sound enters through the sound inlet 110, it flows through the cavity to complete waveform shaping and is emitted from the sound outlet 120.
[0043] A flow divider 200 is installed within the cavity, with its two ends extending to the inlet 110 and outlet 120 respectively, dividing the cavity into two symmetrical channels 130. Sound wave shaping primarily occurs within these channels 130. By using the flow divider 200, the internal space of the cavity is divided into individual channels 130, increasing the contact area between the cavity's inner wall and the sound waves, thereby enhancing the cavity's sound wave shaping effect. Optionally, the number of flow dividers 200 can be set to two or more, thus dividing the cavity into multiple channels 130 to further enhance the shaping effect.
[0044] A guide block 300 is disposed in the channel 130. The guide block 300 is teardrop-shaped and guides the sound waves in the channel toward the outlet 120. The teardrop-shaped guide block 300 can reduce the energy loss when the sound waves come into contact with it, and the streamlined shape can produce a better guiding effect on the sound waves.
[0045] Furthermore, the guide block 300 is disposed in the middle of the channel 130 to reflect and guide sound waves located in the center of the channel 130, while sound waves located at the edge are guided by the inner wall of the channel 130. Compared with traditional waveguides, the combined effect of the guide block 300 and the channel 130 can enhance the sound wave shaping effect of this waveguide.
[0046] Furthermore, the chamber includes a first section 131 and a second section 132 that are interconnected. The end of the first section 131 is connected to the sound inlet 110, and the end of the second section 132 is connected to the sound outlet 120. The inner diameters of both the first section 131 and the second section 132 gradually increase along the direction of sound wave propagation, thereby achieving a sound amplification effect.
[0047] Furthermore, the inner walls of both the first segment 131 and the second segment 132 are planar. Compared to curved inner walls, designing the inner walls as planar simplifies subsequent production processes and reduces the requirements for process precision, thus facilitating production.
[0048] Furthermore, taking the boundary line between the first section 131 and the second section 132 as the boundary, the diverter 200 includes a wave-facing portion 210 located in the first section 131 and a wave-guiding portion 220 located in the second section 132. The wave-facing portion 210 has a triangular cross-section with two planar sides, and its two sides face the sound wave. Its planar design also adapts to the planar inner wall surface of the first section 131. The wave-guiding portion 220 has concave arc surfaces on both sides, and the width of the wave-guiding portion 220 gradually decreases along the direction of sound wave propagation. When the sound wave enters the second section 132, the concave wave-guiding portion 220 can release more space for the sound wave to move, so that the sound wave reflection frequency gradually decreases and the final output waveform is flatter.
[0049] Furthermore, the guide block 300 is disposed at the junction of the first section 131 and the second section 132 to guide the sound waves from the first section 131 to the second section 132. The portion of the guide block 300 located in the second section 132 moves towards the splitter 200 to guide the sound waves into the recess of the waveguide section 220. Then, the sound waves gradually flow along the wall of the waveguide section 220 towards the sound outlet 120.
[0050] Furthermore, the cross-sectional area of channel 130 gradually changes along the propagation path of the sound wave. (Refer to...) Figure 4 The end of the guide block 300 near the sound inlet 110 is designated as the first end 310, and the end of the guide block 300 near the sound outlet 120 is designated as the second end 320. In the channel 130, the area from the sound inlet 110 to the first end 310 of the guide block 300 is designated as the first region 133, the area from the first end 310 to the second end 320 of the guide block 300 is designated as the second region 134, and the area from the second end 320 of the guide block 300 to the sound outlet 120 is designated as the third region 135.
[0051] The cross-sectional area of the first region 133 satisfies the following relationship: Sx1(x)=0.018270x+0.89447, the cross-sectional area of the second region 134 satisfies the following relationship: Sx2(x)=0.0039735x2-0.2825x+6.0058, and the cross-sectional area of the third region 135 satisfies the following relationship: Sx3(x)=3.2585e-06x3-0.00089707x2+0.078586x-1.0759, where x is the percentage of the distance from the sound inlet 110 to the current position to the total length of the chamber.
[0052] Based on the above relationships, a sound wave simulation is performed. In this example, the first region 133 occupies 33% of the cavity length, the second region 134 occupies 14% of the cavity length, and the third region 135 occupies 53% of the cavity length. (Refer to...) Figures 5 to 7The diagram shows the variation of the 130 cross-sectional area of the channel within each region. Furthermore, to standardize the design for applicability to waveguides of any size, the initial surfaces Sx1, Sx2, and Sx3 are all normalized to 1. The expansion described by the equation is a multiple of the initial normalized surface area for each of the three regions.
[0053] Reference Figure 5 Its error degrees of freedom are ±0.04, and the cross-sectional area of the channel within the first region 133 expands linearly.
[0054] Reference Figure 6 Its error degrees of freedom are ±0.08, and the cross-sectional area of the channel in the second region 134 exhibits a second-order polynomial variation and expands exponentially.
[0055] Reference Figure 7 Its error degrees of freedom are ±0.04. The cross-sectional area of the channel within the third region 135 exhibits a third-order polynomial variation and expands exponentially. Initially, the surface area gradually increases until it reaches its maximum value. Then, a slight contraction occurs.
[0056] Reference Figure 8 The actual measured acoustic waveform shows that there are no obvious side lobes, and the sound waves propagate forward with an extension angle within ±10 degrees, effectively suppressing the scattering and loss of sound waves.
[0057] A speaker according to a second aspect embodiment of this application includes a horn 400 and the aforementioned waveguide, wherein the horn 400 is connected to the sound inlet 110 of the waveguide.
[0058] The embodiments of the present invention have been described in detail above with reference to the accompanying drawings. However, the present invention is not limited to the above embodiments, and various changes can be made within the scope of knowledge possessed by those skilled in the art without departing from the spirit of the present invention. Furthermore, the embodiments of the present invention and the features thereof can be combined with each other unless otherwise specified.
Claims
1. A waveguide, characterized in that, include: The waveguide body has an inlet and an outlet at its two ends, and a cavity inside the waveguide body that connects to the inlet and the outlet. A diverter is installed in the chamber, with its two ends extending to the sound inlet and the sound outlet, respectively, to divide the chamber into two symmetrical channels. A flow guide block is disposed in the channel. The flow guide block is teardrop-shaped and guides the sound waves in the channel toward the sound outlet. The flow guide block is disposed in the middle of the channel.
2. The waveguide according to claim 1, characterized in that: The chamber includes a first section and a second section that are connected to each other. The end of the first section is connected to the sound inlet, and the end of the second section is connected to the sound outlet. The inner diameters of both the first section and the second section gradually increase along the direction of sound wave propagation.
3. The waveguide according to claim 2, characterized in that: The inner wall surfaces of both the first section and the second section are planar.
4. The waveguide according to claim 3, characterized in that: The diverter includes a wave-facing section located in the first section and a wave-guiding section located in the second section. The wave-facing section has a triangular cross-section with two planar sides, and the wave-guiding section has two concave arc surfaces on both sides. The width of the wave-guiding section gradually decreases along the direction of sound wave propagation.
5. The waveguide according to claim 4, characterized in that: The guide block is disposed at the junction of the first section and the second section. The portion of the guide block located in the second section moves closer to the splitter to guide the sound waves toward the recess of the waveguide.
6. The waveguide according to claim 1, characterized in that: The end of the guide block near the sound inlet is the first end, and the area in the channel from the sound inlet to the first end of the guide block is the first region. The cross-sectional area of the first region satisfies the relationship: Sx1(x) = 0.018270x + 0.89447, where x is the percentage of the distance from the sound inlet to the current position to the total length of the chamber.
7. The waveguide according to claim 1, characterized in that: The area from one end of the guide block to the other end in the channel is the second region. The cross-sectional area of the second region satisfies the following relationship: Sx2(x) = 0.0039735x2-0.2825x+6.0058, where x is the percentage of the distance from the sound inlet to the current position to the total length of the chamber.
8. The waveguide according to claim 1, characterized in that: The end of the guide block closest to the sound outlet is the second end, and the area in the channel from the second end of the guide block to the sound outlet is the third region. The cross-sectional area of the third region satisfies the following relationship: Sx3(x) = 3.2585e-06x3-0.00089707x2+0.078586x-1.0759, where x is the percentage of the distance from the sound inlet to the current position to the total length of the chamber.
9. The waveguide according to claim 1, characterized in that: The sound inlet is circular in shape, and the sound outlet is rectangular in shape.
10. A speaker, characterized in that, It includes a horn and a waveguide as described in any one of claims 1 to 9, wherein the horn is connected to the sound inlet of the waveguide.