Low frequency vibration loudspeaker

Abstract

The utility model discloses a low frequency vibration loudspeaker, which comprises a front cover and a rear cover, and an installation cavity is formed between the front cover and the rear cover; a centering support is connected to the top of the rear cover; a U-shaped basin is connected to the center of the centering support; a magnetic circuit system comprises an inner magnet, an annular outer magnet and a Huasi; a magnetic gap is formed between the U-shaped basin, the inner magnet and the Huasi; one end of a voice coil is connected to the bottom of the front cover, and the other end extends and is suspended in the magnetic gap. The U-shaped basin is used as the core magnetic component and the vibration component of the magnetic circuit system, and it, together with the inner magnet, the annular outer magnet and the Huasi, forms a highly integrated composite magnetic circuit with extremely low magnetic resistance. The magnetic force lines are maximally converged and compressed in the magnetic gap, forming an ultrahigh magnetic flux density far exceeding that of a traditional structure. The voice coil works in the strong magnetic field, and the conversion efficiency of electric energy to mechanical energy is extremely optimized, so that the loudspeaker has extremely high sensitivity, can output extremely high sound pressure level with small driving power, and significantly enhances the low-frequency performance.

Description

Technical Field

[0001] This utility model relates to the field of vibrating horn technology, and in particular to a low-frequency vibrating horn. Background Technology

[0002] As consumer electronics products become thinner and lighter with higher screen-to-body ratios, their internal space is becoming increasingly compact, placing extreme demands on the space utilization of internal components. As an indispensable acoustic component, the speaker's structural design directly affects the device's acoustic performance and internal layout.

[0003] Currently, common miniature loudspeakers typically employ a traditional structure of a fixed magnetic circuit system and a moving voice coil and diaphragm. While this structure is mature, its performance improvement has reached a bottleneck. First, in traditional magnetic circuit systems, there is room for improvement in magnet utilization; achieving higher magnetic flux density within a limited volume is a key challenge. Second, the diaphragm's driving method is relatively simple, primarily relying on a voice coil bonded to the diaphragm to provide driving force, making it difficult to achieve large-stroke, high-sensitivity sound output within an ultra-thin space. Furthermore, the traditional separate magnetic circuit and vibration system occupy a significant amount of vertical space, contradicting the trend towards ultra-thin device design. Utility Model Content

[0004] Based on the above, the purpose of this utility model is to provide a low-frequency vibration speaker that achieves higher magnetic circuit efficiency and better acoustic performance in an extremely compact space.

[0005] To achieve the above objectives, the present invention adopts the following technical solution: This utility model provides a low-frequency vibration speaker, comprising: A front cover and a rear cover, the front cover and the rear cover being joined together to form an installation cavity between them; A centering support piece is connected to the top of the rear cover, and the top of the centering support piece is also connected to the front cover; The U-shaped basin has its outer periphery connected to the center of the centering support plate; A magnetic circuit system includes an inner magnet, an annular outer magnet, and a washer. The inner magnet is located at the top center of the U-shaped basin, the annular outer magnet surrounds the outer periphery of the U-shaped basin, and the washer is located above the inner magnet. A magnetic gap is formed between the U-shaped basin, the inner magnet, and the washer. The voice coil has one end connected to the bottom of the front cover and the other end extending and suspended within the magnetic gap.

[0006] Preferably, the inner wall of the top of the rear cover is provided with a first annular step and a second annular step, the centering support is disposed on the first annular step, and the front cover is disposed on the second annular step.

[0007] Preferably, the bottom of the front cover is provided with an annular connecting edge, which is located above the centering support piece.

[0008] Preferably, the centering support includes a centering outer ring and a centering inner ring, and a plurality of arc-shaped elongated grooves are formed between the centering outer ring and the centering inner ring.

[0009] Preferably, the U-shaped basin includes a basin body, the top of which is provided with a flange, the flange being disposed above the centering inner ring, and the basin body being located within the centering inner ring.

[0010] Preferably, the diameter of the centering outer ring is 11.65 mm to 12.35 mm.

[0011] Preferably, the diameter of the centering inner ring is 9.15 mm to 9.85 mm.

[0012] Preferably, the thickness of the centering support is 0.09 mm to 0.11 mm.

[0013] Preferably, the diameter of the voice coil is 7.0 mm to 7.55 mm.

[0014] Preferably, the height of the voice coil is 1.5mm to 1.7mm.

[0015] The beneficial effects of this utility model are as follows: (1) This utility model uses the U-shaped cone as the core magnetic guiding component and vibrating component of the magnetic circuit system, which together with the inner magnet, the ring-shaped outer magnet and the washer constitutes a highly integrated composite magnetic circuit with extremely low magnetic resistance. The magnetic lines of force are concentrated and compressed to the maximum extent in the magnetic gap, forming an ultra-high magnetic flux density far exceeding that of traditional structures. The voice coil works in this strong magnetic field, and the conversion efficiency of electrical energy to mechanical energy is optimized to the extreme, so that the speaker obtains extremely high sensitivity and can output extremely high sound pressure level with relatively small driving power, significantly enhancing low frequency performance.

[0016] (2) This structure breaks through the traditional loudspeaker's radiant sound mode that relies solely on a single diaphragm. When the voice coil is energized, it directly drives the front cover to vibrate and, through electromagnetic induction, reacts to the U-shaped cone, causing it to vibrate violently in phase or out of phase. In this way, the front cover and the U-shaped cone together form a collaborative "dual sound radiation surface." This structure is equivalent to significantly increasing the effective radiation area, enabling more efficient air movement, especially in the low-frequency range, producing a deeper, more substantial, and more elastic bass effect, perfectly solving the problem of weak bass in ultra-thin devices.

[0017] (3) By embedding and integrating the magnetic circuit system into the U-shaped cone, this structure completely changes the traditional layout of vertically stacking the magnetic circuit system and the vibration system in loudspeakers. This fusion of the magnetic circuit and vibration system on the horizontal plane significantly reduces the Z-axis height of the entire loudspeaker, freeing up valuable internal space for consumer electronics products that pursue ultra-thin designs.

[0018] (4) The centering support plate provides precise axial positioning and stable elastic support for the voice coil and the connecting front cover through its unique structure. Its specific size range has been carefully optimized to allow the voice coil and diaphragm to perform large-amplitude linear movements while effectively preventing the voice coil from deviating from the center in the magnetic gap and rubbing against the inner magnet or U-shaped cone, thereby ensuring that the speaker still has extremely low distortion and ultra-high reliability under high power and long stroke operating conditions.

[0019] (5) The diameter (7.0mm to 7.55mm) and height (1.5mm to 1.7mm) of the voice coil are optimally matched with the high-performance magnetic circuit system and the dual-radiation system. This further improves the speaker's quality factor and damping characteristics, resulting in a cleaner and crisper low-frequency response, better transient response, and effective suppression of unwanted resonance, leading to a more distinct overall layer and richer details in high-fidelity sound quality. Attached Figure Description

[0020] To more clearly illustrate the technical solutions in the embodiments of this utility model, the drawings used in the description of the embodiments of this utility model will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the content of the embodiments of this utility model and these drawings without creative effort.

[0021] Figure 1 This invention provides a schematic diagram of the structure of a low-frequency vibration horn according to an embodiment of the present invention; Figure 2 A cross-sectional structural diagram of a low-frequency vibration horn is provided for an embodiment of this utility model; Figure 3 This is an exploded structural diagram of a low-frequency vibration horn provided in an embodiment of the present invention.

[0022] In the picture: 1. Front cover; 11. Annular connecting edge; 2. Rear cover; 21. Mounting cavity; 22. First annular step; 23. Second annular step; 3. Centering support plate; 31. Centering outer ring; 32. Centering inner ring; 33. Arc-shaped long groove; 4. U-shaped cone; 41. Cone body; 42. Flanged edge; 5. Magnetic circuit system; 51. Inner magnet; 52. Annular outer magnet; 53. Washer; 54. Magnetic gap; 6. Voice coil; 7. Circuit board. Detailed Implementation

[0023] To make the technical problems solved by this utility model, the technical solutions adopted, and the technical effects achieved clearer, the technical solutions of the embodiments of this utility model will be further described in detail below with reference to the accompanying drawings. Obviously, the described embodiments are only some embodiments of this utility model, and not all embodiments. Based on the embodiments of this utility model, all other embodiments obtained by those skilled in the art without creative effort are within the protection scope of this utility model.

[0024] In the description of this utility model, unless otherwise explicitly specified and limited, the terms "connected," "linked," and "fixed" should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this utility model based on the specific circumstances.

[0025] In this invention, unless otherwise explicitly specified and limited, "above" or "below" the second feature can include direct contact between the first and second features, or contact between the first and second features through another feature between them. Furthermore, "above," "over," and "on top" of the second feature includes the first feature directly above or diagonally above the second feature, or simply indicates that the first feature is at a higher horizontal level than the second feature. "Below," "below," and "under" the second feature includes the first feature directly below or diagonally below the second feature, or simply indicates that the first feature is at a lower horizontal level than the second feature.

[0026] In the description of this embodiment, the terms "upper," "lower," "left," "right," etc., refer to the orientation or positional relationship shown in the accompanying drawings. They are used only for ease of description and simplification of operation, 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 utility model. In addition, the terms "first" and "second" are only used for distinction in description and have no special meaning.

[0027] like Figures 1 to 3As shown, this embodiment of the utility model provides a low-frequency vibration horn, including: a front cover 1 and a rear cover 2, the front cover 1 being located above the rear cover 2, the front cover 1 and the rear cover 2 being joined together, forming an installation cavity 21 between them; the inner wall of the top of the rear cover 2 is precision injection molded with a first annular step 22 and a second annular step 23 concentrically arranged. The first annular step 22 is located inside the second annular step 23 and is slightly lower in height.

[0028] A centering support 3 is connected above the rear cover 2. The centering support 3 is disposed on the first annular step 22, and the front cover 1 is also connected above the centering support 3. The centering support 3 includes a centering outer ring 31 and a centering inner ring 32. A plurality of arc-shaped elongated grooves 33 formed by chemical etching or die cutting are formed between the centering outer ring 31 and the centering inner ring 32. The diameter of the centering outer ring 31 is 11.65 mm to 12.35 mm. The diameter of the centering inner ring 32 is 9.15 mm to 9.85 mm. The thickness of the centering support 3 is 0.09 mm to 0.11 mm, preferably 0.1 mm.

[0029] The bottom of the front cover 1 is provided with a downwardly extending annular connecting edge 11, which is fixed above the centering support plate 3 by adhesive and closely abuts the inner sidewall of the second annular step 23, ensuring the precise positioning and secure installation of the front cover 1. A circuit board 7 is provided on the top of the front cover 1.

[0030] The U-shaped basin 4, whose outer periphery is connected to the center of the centering support plate 3, is formed by stamping magnetically conductive steel sheet and includes a basin body 41 and a flange 42 extending horizontally outward from the top of the basin body 41. The flange 42 is fixed above the centering inner ring 32 of the centering support plate 3 by gluing, while the basin body 41 is suspended in the inner space of the centering inner ring 32.

[0031] The magnetic circuit system 5 includes an inner magnet 51, an annular outer magnet 52, and a washer 53. The inner magnet 51 is located at the top center of the U-shaped basin 4. The annular outer magnet 52 surrounds the outer periphery of the U-shaped basin 4. The washer 53 is located above the inner magnet 51. The inner wall of the basin body 41 of the U-shaped basin 4, the outer wall of the inner magnet 51, and the inner wall of the washer 53 together form an annular magnetic gap 54 with uniform width.

[0032] The voice coil 6 has one end connected to the lower part of the front cover 1, and the other end extends and is suspended in the magnetic gap 54, and remains in a non-contact state with the surroundings.

[0033] In this embodiment of the invention, when the audio current passes through the voice coil 6, the energized voice coil 6 is subjected to the Ampere force in the strong magnetic field of the magnetic gap 54, resulting in vertical movement. This movement directly drives the front cover 1 to vibrate through the voice coil 6, and also drives the U-shaped cone 4 to vibrate through the reaction force of electromagnetic induction. The front cover 1 and the U-shaped cone 4 together serve as an effective sound radiation surface, synergistically pushing the air, especially efficiently radiating strong low-frequency sound waves. This invention uses the U-shaped cone 4 as the core magnetic guiding component and vibrating component of the magnetic circuit system 5, making it, together with the inner magnet 51, the annular outer magnet, and the washer 53, form a highly integrated composite magnetic circuit with extremely low magnetic resistance. The magnetic lines of force are concentrated and compressed to the maximum extent in the magnetic gap 54, forming an ultra-high magnetic flux density far exceeding that of traditional structures. The voice coil 6 operates in this strong magnetic field, and the conversion efficiency of electrical energy to mechanical energy is optimized to the extreme, thereby giving the speaker extremely high sensitivity, enabling it to output extremely high sound pressure levels with relatively low driving power, significantly enhancing low-frequency performance. The structure of this invention breaks through the traditional speaker model that relies solely on a single diaphragm to radiate sound. When the voice coil 6 is energized, it directly drives the front cover 1 to vibrate, and simultaneously acts on the U-shaped cone 4 through electromagnetic induction, causing it to vibrate violently in phase or out of phase. In this way, the front cover 1 and the U-shaped cone 4 together form a collaborative "dual sound radiation surface." This structure is equivalent to significantly increasing the effective radiation area, enabling more efficient air movement, especially in the low-frequency range, producing a deeper, more substantial, and more elastic bass effect, perfectly solving the problem of weak bass in ultra-thin devices. By embedding and integrating the magnetic circuit system 5 onto the U-shaped cone 4, this structure completely changes the traditional vertical stacking layout of the magnetic circuit system 5 and the vibration system in loudspeakers. This horizontal integration of the magnetic circuit and vibration system significantly reduces the overall Z-axis height of the speaker, freeing up valuable internal space for consumer electronics products pursuing ultra-thin designs.

[0034] In some embodiments, the diameter of the voice coil 6 is 7.0 mm to 7.55 mm. Preferably, the height of the voice coil 6 is 1.5 mm to 1.7 mm. The diameter (7.0 mm to 7.55 mm) and height (1.5 mm to 1.7 mm) parameters of the voice coil 6 are optimally matched with the high-performance magnetic circuit system 5 and the dual-radiation system. This further improves the speaker's quality factor and damping characteristics, resulting in a cleaner and crisper low-frequency response, better transient response, effective suppression of unwanted resonance, and a more distinct overall layering and richer detail in the high-fidelity sound quality.

[0035] Note that the above description is merely a preferred embodiment of the present invention and the technical principles employed. Those skilled in the art will understand that the present invention is not limited to the specific embodiments described herein, and various obvious changes, readjustments, and substitutions can be made without departing from the scope of protection of the present invention. Therefore, although the present invention has been described in detail through the above embodiments, the present invention is not limited to the above embodiments, and may include many other equivalent embodiments without departing from the concept of the present invention. The scope of the present invention is determined by the scope of the appended claims.

Claims

1. A low-frequency vibration horn, characterized in that, include: A front cover and a rear cover, the front cover and the rear cover being joined together to form an installation cavity between them; A centering support piece is connected to the top of the rear cover, and the top of the centering support piece is also connected to the front cover; The U-shaped basin has its outer periphery connected to the center of the centering support plate; A magnetic circuit system includes an inner magnet, an annular outer magnet, and a washer. The inner magnet is located at the top center of the U-shaped basin, the annular outer magnet surrounds the outer periphery of the U-shaped basin, and the washer is located above the inner magnet. A magnetic gap is formed between the U-shaped basin, the inner magnet, and the washer. The voice coil has one end connected to the bottom of the front cover and the other end extending and suspended within the magnetic gap.

2. A low-frequency vibration horn according to claim 1, characterized in that, The inner wall of the top of the rear cover is provided with a first annular step and a second annular step, the centering support is provided on the first annular step, and the front cover is provided on the second annular step.

3. A low-frequency vibration horn according to claim 2, characterized in that, The bottom of the front cover is provided with an annular connecting edge, which is located above the centering support plate.

4. A low-frequency vibration horn according to any one of claims 1 to 3, characterized in that, The centering support includes a centering outer ring and a centering inner ring, and a plurality of arc-shaped elongated grooves are formed between the centering outer ring and the centering inner ring.

5. A low-frequency vibration horn according to claim 4, characterized in that, The U-shaped basin includes a basin body, the top of which is provided with a flange, the flange being located above the centering inner ring, and the basin body being located within the centering inner ring.

6. A low-frequency vibration horn according to claim 4, characterized in that, The diameter of the centering outer ring is 11.65 mm to 12.35 mm.

7. A low-frequency vibration horn according to claim 4, characterized in that, The diameter of the centering inner ring is 9.15 mm to 9.85 mm.

8. A low-frequency vibration horn according to claim 1, characterized in that, The thickness of the centering support is 0.09 mm to 0.11 mm.

9. A low-frequency vibration horn according to claim 1, characterized in that, The diameter of the voice coil is 7.0 mm to 7.55 mm.

10. A low-frequency vibration horn according to claim 1, characterized in that, The height of the voice coil is 1.5mm to 1.7mm.

Images