A speaker with variable sound emission direction and an angle adjusting method thereof

Abstract

This application discloses a loudspeaker with variable sound emission direction and its angle adjustment method. The loudspeaker includes: a housing having a receiving cavity, the inner wall of which is formed as a first spherical surface; a tweeter assembly having a second spherical surface on its outer surface adapted to the first spherical surface, the tweeter assembly being rotatably mounted in the housing through the cooperation of the second spherical surface and the first spherical surface to change the angle of the radiation axis of the sound wave relative to the housing; and an elastic damping ring disposed between the first and second spherical surfaces and axially compressed against the first and second spherical surfaces to provide rotational damping force and suspension support force. This invention achieves flexible adjustment of the sound emission direction through the spherical pair fit, and simultaneously realizes the triple functions of rotational damping, suspension support, and acoustic sealing using the axially compressed elastic damping ring, enabling the tweeter assembly to be stably positioned after adjustment, with a smooth adjustment feel and excellent acoustic performance.

Description

Technical Field

[0001] This application relates to the field of loudspeakers, and in particular to a loudspeaker with variable sound emission direction and a method for adjusting its angle. Background Technology

[0002] With the continuous development of audio technology, users have placed higher demands on the sound quality and functionality of speakers. In many applications, such as multimedia playback, home theaters, and conference sound reinforcement, speakers need to be able to adjust their sound emission direction according to the actual listening position or environmental layout to obtain the best listening experience. However, the sound emission direction of traditional speakers is usually fixed, and their sound waves spread spherically, making it difficult to achieve precise sound energy delivery. This presents certain limitations when facing complex acoustic environments or changing listening needs.

[0003] Therefore, how to provide a loudspeaker that can adjust the sound direction and stably maintain the adjusted sound direction during use is a technical problem that urgently needs to be solved by those skilled in the art. Summary of the Invention

[0004] This application aims to solve at least one of the technical problems existing in the prior art. To this end, this application proposes a loudspeaker with variable sound emission direction, which can adjust the sound emission direction of the loudspeaker and maintain the sound emission direction unchanged during use.

[0005] To solve the above-mentioned technical problems, the present invention provides the following technical solution: A loudspeaker with variable sound emission direction, comprising: The outer shell has a receiving cavity, the inner wall portion of which is formed as a first spherical surface; A tweeter assembly has a second spherical surface on its outer surface that is adapted to the wall surface of the first spherical surface. The tweeter assembly is rotatably mounted in the housing by means of the cooperation between the second spherical surface and the first spherical surface, so as to change the angle of the radiation axis of the sound wave relative to the housing. An elastic damping ring is disposed between the first spherical surface and the second spherical surface, and is axially compressed against the first spherical surface and the second spherical surface to provide rotational damping force and suspension support force.

[0006] In this embodiment, by designing the tweeter assembly as a spherical pair structure and installing it within the housing, the direction of sound emission can be freely adjusted. More importantly, an axially compressed elastic damping ring is added between the spherical pairs. This elastic damping ring simultaneously achieves three key functions: Provides rotational damping force: Through its own friction and elastic deformation, it provides appropriate resistance to the rotation of the tweeter assembly, preventing it from easily wobbling and ensuring that the adjusted angle can be maintained stably.

[0007] Provides suspended support: Due to axial compression, the elastic damping ring can "suspend" the tweeter component within the housing, avoiding direct collision and wear between rigid components, thus improving the stability and service life of the structure.

[0008] Provides an acoustic seal: The tight fit of the elastic damping ring between the spheres forms an effective acoustic seal, preventing sound waves from leaking out of the gaps and ensuring sound quality.

[0009] As a further improvement to the above technical solution, an annular damping groove is provided on the first spherical surface, and the elastic damping ring is embedded in the annular damping groove. The radial inner circumferential surface of the elastic damping ring protrudes from the first spherical surface to allow for an interference fit with the second spherical surface. This structure simplifies the assembly process, ensures accurate positioning of the elastic damping ring, and provides uniform and reliable damping force and sealing through the interference fit.

[0010] As a further improvement to the above technical solution, the elastic damping ring is made of silicone rubber or nitrile rubber. These materials have good elasticity, wear resistance, and aging resistance, and can provide durable and stable damping performance.

[0011] As a further improvement to the above technical solution, the tweeter assembly includes a tweeter unit and a tweeter base. The tweeter unit is fixedly mounted on the tweeter base, and the outer peripheral surface of the tweeter base forms the second spherical surface. The first spherical surface and the second spherical surface cooperate to form a spherical pair. This split design reduces the installation difficulty of the tweeter unit and makes the processing of the spherical pair simpler and more economical.

[0012] As a further improvement to the above technical solution, a bottom cover is detachably connected to the bottom of the housing. A rotating support is provided on the bottom cover, and this rotating support contacts the bottom of the tweeter assembly to assist in supporting the tweeter assembly and facilitating its rotation. This rotating support makes point or line contact with the bottom of the tweeter assembly, which helps support the weight of the tweeter assembly, further reducing rotational friction and making angle adjustment smoother.

[0013] As a further improvement to the above technical solution, a first balancing hole is provided at the bottom of the tweeter assembly, and a second balancing hole is correspondingly provided on the bottom cover. The first balancing hole and the second balancing hole are connected to balance the air pressure between the rear cavity of the tweeter assembly and the outside environment. The design of the air pressure balancing hole can eliminate the back pressure generated when the tweeter diaphragm moves, reduce nonlinear distortion, and improve the purity of the sound.

[0014] As a further improvement to the above technical solution, the change in the sound emission direction of the tweeter component includes horizontal angle adjustment and / or vertical angle adjustment, enabling the tweeter component to emit sound directionally towards the listening area. This achieves precise sound wave delivery and optimizes the auditory effect at specific listening positions.

[0015] As a further improvement to the above technical solution, the tweeter component has a horizontal rotation angle of 360° and a vertical tilt angle of ±10°. This angle range covers the listening needs of most home and commercial scenarios.

[0016] As a further improvement to the above technical solution, the tweeter includes a convex diaphragm and a magnetic return unit. The convex diaphragm covers the magnetic return unit and has an arc-shaped structure. The convex diaphragm helps to widen the diffusion angle of sound waves, and combined with the adjustable sound emission direction, it can create a wider and more natural high-frequency sound field.

[0017] Furthermore, the present invention also provides a method for adjusting the angle of a loudspeaker with variable sound emission direction as described above, comprising the following steps: An external force is applied to rotate the tweeter relative to the housing, overcoming the rotational damping force provided by the elastic damping ring; After rotating to the target angle, the external force is removed, and the rotational damping force of the elastic damping ring is used to maintain the tweeter component at the target angle. During rotation and after positioning, the elastic damping ring always maintains the suspended support force and acoustic sealing force.

[0018] Compared with the prior art, the technical solution of the present invention has the following beneficial effects: The speaker's sound emission direction is adjustable in this embodiment, which optimizes the listening experience. Users can freely adjust the sound emission direction of the tweeter component according to their listening position or environmental layout, so as to achieve precise delivery of sound energy and significantly improve the listening experience in a specific area.

[0019] This embodiment utilizes the damping force provided by the elastic damping ring to ensure a smooth and seamless angle adjustment process. After adjustment, it provides sufficient friction to stably lock the tweeter component at the target angle, preventing displacement due to vibration or gravity. Furthermore, a single elastic damping ring component simultaneously achieves rotational damping, suspended support, and acoustic sealing, significantly simplifying the product structure and reducing assembly difficulty and manufacturing costs. Simultaneously, the sealing of the elastic damping ring and the design of the air pressure balance hole effectively prevent sound leakage and back pressure interference, ensuring high-fidelity sound quality from the speaker.

[0020] Additional aspects and advantages of this application will be set forth in part in the description which follows, and in part will be obvious from the description, or may be learned by practice of this application. Attached Figure Description

[0021] The accompanying drawings are used to provide a further understanding of the technical solutions disclosed in this application and form part of the specification. They are used together with the embodiments disclosed in this application to explain the technical solutions of this application and do not constitute a limitation on the technical solutions disclosed in this application.

[0022] Figure 1 This is a schematic diagram of the overall appearance structure of an embodiment of this application; Figure 2 This is a cross-sectional structural diagram of an embodiment of this application; Figure 3 This is a schematic cross-sectional view of the tweeter assembly after rotation, according to an embodiment of this application. Figure 4 This is a schematic diagram of the first exploded structure of an embodiment of this application; Figure 5 This is a schematic diagram of the second exploded structure of an embodiment of this application.

[0023] Reference numerals: 100, outer casing; 110, receiving cavity; 111, first spherical surface; 112, annular damping groove; 200, tweeter assembly; 210, tweeter unit; 211, convex diaphragm; 212, magnetic return unit; 220, tweeter base; 221, second spherical surface; 230, first balance hole; 300, elastic damping ring; 400, bottom cover; 410, rotating support; 420, second balance hole. Detailed Implementation

[0024] The embodiments of this application 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 this application, and should not be construed as limiting this application.

[0025] In the description of this application, it should be understood that the orientation descriptions, such as up, down, front, back, left, right, etc., indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this application 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 limitations on this application.

[0026] In the description of this application, "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.

[0027] In the description of this application, unless otherwise expressly defined, terms such as "setup," "installation," and "connection" should be interpreted broadly, and those skilled in the art can reasonably determine the specific meaning of the above terms in this application in conjunction with the specific content of the technical solution.

[0028] In the description of this application, 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 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.

[0029] Example 1 Reference Figures 1-5 This application provides a loudspeaker with variable sound direction, which mainly includes a housing 100, a tweeter assembly 200 and an elastic damping ring 300.

[0030] The outer casing 100 is generally cylindrical or square, and forms an internal receiving cavity 110. The upper part of the receiving cavity 110 is open, and a portion of its inner wall is machined into a smooth concave spherical surface, defined as a first spherical surface 111. At the bottom of the outer casing 100, a bottom cover 400 is detachably installed to facilitate the assembly and maintenance of the internal components.

[0031] The tweeter assembly 200 comprises a tweeter unit 210 and a tweeter base 220. The tweeter unit 210 is fixedly mounted at the top center of the tweeter base 220. The overall shape of the tweeter base 220 is part of a sphere, and its outer peripheral surface is machined into a smooth convex spherical surface, defined as a second spherical surface 221. The second spherical surface 221 has the same radius of curvature as the first spherical surface 111 on the housing 100, and the two cooperate to form a complete spherical pair. The tweeter unit 210 includes a convex diaphragm 211 and a magnetron return unit 212. The convex diaphragm 211 covers the magnetron return unit 212 and has an outwardly convex arc-shaped structure, which helps to diffuse high-frequency sound waves.

[0032] Furthermore, the arc height H of the convex diaphragm ranges from 5mm to 7mm, and the arc radius R ranges from 15mm to 20mm.

[0033] In one preferred embodiment, the arc height H of the convex diaphragm is 6.0 mm to 6.2 mm, and the arc radius R is 17.0 mm to 17.5 mm. After experimental verification and simulation analysis, the applicant found that when the arc height H of the convex diaphragm is 6.0 mm to 6.2 mm and the arc radius R is 17.0 mm to 17.5 mm, the diaphragm exhibits optimal directivity uniformity in the high-frequency range (8 kHz-20 kHz), and the off-axis response attenuation can be controlled within 3 dB; simultaneously, the first-order split vibration frequency is increased to above 22 kHz, ensuring that the diaphragm vibrates in piston mode throughout the entire audible frequency range. Experiments show that this parameter range achieves the optimal balance between directivity control, frequency response extension, and distortion suppression.

[0034] To achieve rotational damping, support, and sealing, an annular damping groove 112 is formed on the first spherical surface 111. The elastic damping ring 300 is embedded in the annular damping groove 112. The cross-sectional diameter of the elastic damping ring 300 is slightly larger than the depth of the annular damping groove 112, so that its radial inner circumferential surface naturally protrudes from the surface of the first spherical surface 111. When the tweeter assembly 200 is installed into the housing 100, its second spherical surface 221 will compress the elastic damping ring 300, forming an interference fit. At this time, the elastic damping ring 300 is compressed radially, thereby generating a stable pressure between the second spherical surface 221 and the first spherical surface 111. This pressure provides friction (i.e., damping force) during rotation and also elastically "lifts" the tweeter assembly 200, achieving suspended support and avoiding direct rigid contact between the first spherical surface 111 and the second spherical surface 221.

[0035] The elastic damping ring has a Shore hardness of A20 to A50 and an axial compression ratio of 10% to 30%. Preferably, the elastic damping ring 300 in this embodiment is made of silicone rubber with a Shore hardness of 40A and an axial compression ratio of 20%.

[0036] By limiting the Shore hardness of the elastic damping ring to A20~A50, precise control of the rotational damping force is achieved. This hardness range ensures sufficient damping force to maintain stable positioning of the tweeter component at any angle, while avoiding rotational difficulties due to excessive hardness or positioning instability due to insufficient hardness, providing users with a smooth, uniform, and tactile operating feel. The axial compression ratio is limited to 10%~30%, ensuring the elastic damping ring is within its optimal elastic deformation range after assembly. Within this compression ratio range, the damping ring can continuously generate sufficient rebound force, maintaining a tight fit with the second spherical surface. Even under long-term use, material aging, or temperature changes, it can maintain a reliable acoustic seal, effectively preventing sound wave leakage and standing wave generation.

[0037] To further improve the smoothness of rotation and assist in supporting the weight of the tweeter assembly 200, a smooth protrusion is provided at the center of the bottom cover 400 as a rotation support 410. This rotation support 410 contacts the center point of the bottom of the tweeter assembly 200. When the tweeter assembly 200 rotates under the action of external force, this point contact provides auxiliary support without generating excessive frictional torque.

[0038] Furthermore, a first balance hole 230 is formed at the bottom of the tweeter assembly 200, and a second balance hole 420 is formed at a corresponding position on the bottom cover 400. When the bottom cover 400 is installed, the first balance hole 230 and the second balance hole 420 are connected, forming a channel connecting the rear cavity of the tweeter unit 210 to the outside atmosphere. This channel can balance the air pressure in the rear cavity during diaphragm vibration, reducing distortion.

[0039] When a user needs to adjust the direction of the speaker's sound, they can directly hold the edge of the tweeter assembly 200 with their hand and apply a horizontal or vertical torque.

[0040] Under the action of torque, the tweeter assembly 200 overcomes the static friction between the elastic damping ring 300 and the second spherical surface 221, and begins to rotate relative to the housing 100. During the rotation, the second spherical surface 221 of the tweeter assembly 200 always maintains interference contact with the elastic damping ring 300, and the rotating support 410 also provides smooth auxiliary support at the bottom. Therefore, the entire adjustment process feels smooth and uniform, without any sticking.

[0041] After the user rotates the tweeter assembly 200 to the target angle (e.g., 180° horizontal rotation or 10° vertical tilt) and removes the external force, the frictional force (i.e., rotational damping force) generated by the compression of the elastic damping ring 300 immediately comes into play, firmly locking the tweeter assembly 200 at the current angle, preventing it from changing direction due to uneven weight distribution or minor external vibrations. Throughout the adjustment process and after positioning, the elastic damping ring 300 maintains pressure on the second spherical surface 221, thus its acoustic sealing function remains effective, ensuring that sound waves do not leak from the gaps in the spherical pair.

[0042] In this embodiment, the tweeter component 200 can rotate continuously 360° in the horizontal direction and tilt within a range of ±10° in the vertical direction, which is sufficient to meet the directional requirements in most listening scenarios.

[0043] Example 2 This embodiment is basically the same as Embodiment 1, except for the material and installation method of the elastic damping ring 300. In this embodiment, the elastic damping ring 300 is made of nitrile rubber, which has better oil resistance and wear resistance. Meanwhile, the annular damping groove 112 can be disposed on the second spherical surface 221 of the tweeter assembly 200, rather than on the first spherical surface 111 of the housing. Accordingly, the elastic damping ring 300 is embedded in the annular damping groove of the second spherical surface 221, with its radial outer circumferential surface protruding from the second spherical surface, forming an interference fit with the first spherical surface 111 of the housing 100. This modified solution also achieves the technical effect of Embodiment 1.

[0044] Example 3 This embodiment improves upon Embodiment 1 by modifying the rotating support. The single protrusion on the bottom cover 400 is replaced with multiple miniature ball bearings (not shown in the figure), which are rotatably mounted on the retainer of the bottom cover 400. The bottom of the tweeter assembly 200 contacts these ball bearings. When the tweeter assembly rotates, the ball bearings roll accordingly, converting sliding friction into rolling friction, further reducing rotational resistance and making angle adjustment easier and less strenuous.

[0045] The above description is merely a preferred embodiment of the present invention and is not intended to limit the scope of protection of the present invention. Any modifications, equivalent substitutions, improvements, etc., made within the spirit and principles of the present invention should be included within the scope of protection of the present invention.

Claims

1. A speaker whose sound emission direction is variable, characterized by comprising: include: The outer shell has a receiving cavity, the inner wall portion of which is formed as a first spherical surface; A tweeter assembly having a second spherical surface on its outer surface that is adapted to the first spherical surface. The tweeter assembly is rotatably mounted in the housing by means of the cooperation between the second spherical surface and the first spherical surface, so as to change the angle of the radiation axis of the sound wave relative to the housing. An elastic damping ring is disposed between the first spherical surface and the second spherical surface, and is axially compressed against the first spherical surface and the second spherical surface to provide rotational damping force and suspension support force.

2. The sound direction variable speaker according to claim 1, wherein An annular damping groove is provided on the first spherical surface, and the elastic damping ring is embedded in the annular damping groove. The radial inner circumferential surface of the elastic damping ring protrudes from the first spherical surface to make an interference fit with the second spherical surface.

3. The sound direction variable speaker according to claim 2, wherein The elastic damping ring is made of silicone rubber or nitrile rubber.

4. The sound direction variable speaker according to claim 1, wherein The tweeter assembly includes a tweeter unit and a tweeter base. The tweeter unit is fixedly mounted on the tweeter base. The outer peripheral surface of the tweeter base forms the second spherical surface. The first spherical surface and the second spherical surface cooperate with each other to form a spherical pair.

5. The sound direction variable speaker according to claim 1, wherein The bottom of the housing is detachably connected to a bottom cover, and a rotating support is provided on the bottom cover. The rotating support contacts the bottom of the tweeter assembly and is used to assist in supporting the tweeter assembly and supporting the rotation of the tweeter assembly.

6. The sound direction variable speaker according to claim 5, wherein The tweeter assembly has a first balancing hole at its bottom and a corresponding second balancing hole on its bottom cover. The first balancing hole and the second balancing hole are connected to balance the air pressure between the rear cavity of the tweeter assembly and the outside environment.

7. The loudspeaker with variable sound emission direction according to claim 1, characterized in that, The change in the sound emission direction of the tweeter component includes horizontal angle adjustment and / or vertical angle adjustment, so that the tweeter component can emit sound directionally toward the listening area.

8. The loudspeaker with variable sound emission direction according to claim 7, characterized in that, The tweeter component has a horizontal rotation angle of 360° and a vertical tilt angle of ±10°.

9. The loudspeaker with variable sound emission direction according to claim 4, characterized in that, The tweeter unit includes a convex diaphragm and a magnetoresistive unit. The convex diaphragm covers the magnetoresistive unit and has an arc-shaped structure.

10. A method for adjusting the angle of a loudspeaker, characterized in that, Using a loudspeaker with variable sound emission direction as described in any one of claims 1-9, the method includes the following steps: An external force is applied to rotate the tweeter relative to the housing, overcoming the rotational damping force provided by the elastic damping ring; After rotating to the target angle, the external force is removed, and the rotational damping force of the elastic damping ring is used to maintain the tweeter component at the target angle. During rotation and after positioning, the elastic damping ring always maintains the suspended support force and acoustic sealing force.

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