A loudspeaker

Abstract

This utility model discloses a loudspeaker, including a bass basket, a bass diaphragm, a bass magnetic circuit assembly, a first bass voice coil, an extension frame, a second bass voice coil, and a tweeter. A clearance hole is provided in the axial central region of the bass diaphragm. The bass magnetic circuit assembly has a first magnetic gap and a second magnetic gap arranged coaxially, forming a magnetic saturation region in their axial central regions. The first bass voice coil is suspended in the first magnetic gap. The extension frame connects the first and second bass voice coils, with the second bass voice coil suspended in the second magnetic gap. The tweeter passes through the clearance hole and is mounted on the bass magnetic circuit assembly. The tweeter is at least partially located within the magnetic saturation region, and the tweeter shares the magnetic flux of the magnetic saturation region with the second bass voice coil. Magnetic energy reuse is achieved without adding additional magnets. The second bass voice coil is also located within the magnetic saturation region and shares the magnetic flux with the tweeter, achieving synchronous enhancement of low and high frequencies.

Description

Technical Field

[0001] This utility model relates to the field of acoustic device technology, and in particular to a loudspeaker. Background Technology

[0002] In miniature or thin loudspeaker designs, engineers typically employ a larger magnetic circuit system with a ring voice coil arranged around its perimeter to achieve sufficient low-frequency sound pressure. However, the center of the magnetic circuit (i.e., the geometric center of the magnet and its surrounding area) rapidly saturates due to extremely high magnetic flux density, forming a "magnetic saturation zone" that contributes almost nothing to bass drive. This region is generally addressed in the following ways in existing technologies.

[0003] 1. Simply leaving it empty, only as a mechanical clearance or pressure relief hole, completely wastes magnetic energy; 2. Filling with non-magnetic support only serves as structural support, and the magnetic energy is still not utilized; 3. Placing a passive radiator or tuning mesh at the center also only utilizes air volume and does not contribute to electroacoustic conversion.

[0004] The common drawback of the above approaches is that the magnetic saturation region cannot effectively drive the bass voice coil, nor is it used to drive other transducers, resulting in a double waste of valuable space and magnetic energy. At the same time, to improve high-frequency extension, a tweeter unit still needs to be placed in front of or on the side of the speaker, further reducing the overall thickness or width. Therefore, existing technology cannot achieve the technical goal of "enhancing both high-frequency and low-frequency output while reusing the magnetic circuitry in the magnetic saturation region" without increasing the overall size, all within the hard constraint of this limitation. Utility Model Content

[0005] The technical problem to be solved by this utility model is to provide a loudspeaker to solve the problem that existing loudspeakers cannot effectively utilize the magnetic saturation region at the center of the magnetic circuit while keeping the size unchanged, resulting in waste of magnetic energy and difficulty in simultaneously improving high and low frequency performance.

[0006] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a loudspeaker, comprising... Bass basket; A bass diaphragm is fixed to the bass frame on its outer periphery, and a clearance hole is provided in the axial central region of the bass diaphragm. The bass magnetic circuit assembly, fixed to the bass basket, has a first magnetic gap and a second magnetic gap arranged coaxially, and forms a magnetic saturation region in the axial central region of the two. The first bass voice coil is connected to the bass diaphragm and suspended in the first magnetic gap; An extended frame is connected to the first bass voice coil and extends toward the magnetic saturation region; The second bass voice coil is fixed to the end of the extended frame away from the first bass voice coil and suspended in the second magnetic gap; A tweeter unit passes through the clearance hole and is mounted on the bass magnetic circuit assembly. The tweeter unit is at least partially located within the magnetic saturation region. The tweeter unit and the second bass voice coil share the magnetic flux of the magnetic saturation region.

[0007] Furthermore, the bass magnetic circuit assembly includes a bass yoke, on which a first outer magnet, a first inner magnet, a second outer magnet, and a second inner magnet are mounted. The first outer magnet is connected to the bass frame and forms a first magnetic gap with the first inner magnet, and a second magnetic gap is formed between the second outer magnet and the second inner magnet.

[0008] Furthermore, it also includes a bass washer, which includes a main body and a bent extension connected to the main body. The main body is mounted on the top of the first inner magnet, and the bent extension is connected to the bottom of the second outer magnet.

[0009] Furthermore, the bass washer also includes a first support portion connected to the main body, the first support portion being connected to the bottom of the tweeter.

[0010] Furthermore, the bass washer also includes a second support portion connected to the main body portion, the second support portion being connected to the bottom end of the bass diaphragm near the recess hole.

[0011] Furthermore, a sealing ring is provided at the bottom of the bass diaphragm, and the sealing ring is connected to the second support portion.

[0012] Furthermore, the bass basket is made of magnetically conductive metal.

[0013] Furthermore, the tweeter unit includes A high-frequency yoke is mounted on top of the low-frequency magnetic circuit assembly; A high-frequency magnet is installed in the central region of the top of the high-frequency yoke; A tweeter washer is installed on top of the tweeter magnet; A tweeter frame is installed on the outer edge of the tweeter yoke and passes through the clearance hole; The tweeter diaphragm is fixed to the top of the tweeter frame on its outer periphery; The tweeter voice coil is installed at the bottom of the tweeter diaphragm and suspended on the outside of the tweeter washer.

[0014] Furthermore, the outer peripheral edge of the tweeter yoke is provided with a positioning protrusion, and the tweeter diaphragm is provided with a positioning groove connected to the positioning protrusion; or, the outer peripheral edge of the tweeter yoke is provided with a positioning groove, and the tweeter diaphragm is provided with a positioning protrusion connected to the positioning groove.

[0015] Furthermore, the tweeter frame is made of magnetically conductive metal.

[0016] The beneficial effects of this utility model are as follows: The speaker provided by this utility model has a clearance hole opened in the axial center of the bass diaphragm, and the tweeter is embedded in the magnetic saturation zone. This transforms the center magnetic flux that could not be utilized by the first bass voice coil into the effective working magnetic flux of the tweeter, thereby achieving magnetic energy reuse without adding an extra magnet. The second bass voice coil is also located in the magnetic saturation zone and shares the magnetic flux with the tweeter. The extended frame rigidly connects the first and second bass voice coils to form a dual voice coil synchronous drive structure, so that the same magnetic circuit provides additional driving force for the bass and independent magnetic circuit support for the tweeter, achieving synchronous enhancement of low and high frequencies. The tweeter passes through the clearance hole and directly utilizes the space of the magnetic saturation zone, avoiding the superposition of the tweeter magnetic circuit on the outside of the traditional structure. The overall height of the speaker can be maintained or reduced to meet the requirements of thin-type applications. The clearance hole and through-mount also provide a radial positioning reference for the tweeter, reducing cumulative assembly errors, improving the concentricity of the magnetic gap, thereby reducing harmonic distortion caused by eccentricity and improving sound quality consistency. Attached Figure Description

[0017] Figure 1 This is an assembly drawing of the loudspeaker according to Embodiment 1 of this utility model; Figure 2 This is an exploded view of the loudspeaker according to Embodiment 1 of this utility model; Figure 3 This is a schematic cross-sectional view of the loudspeaker according to Embodiment 1 of this utility model; Figure 4 This is a schematic diagram of another cross-sectional structure of the loudspeaker according to Embodiment 1 of this utility model; Figure 5 This is a schematic diagram of the bass magnetic circuit assembly according to Embodiment 1 of this utility model; Figure 6 This is an exploded view of the tweeter unit in Embodiment 1 of this utility model.

[0018] Label Explanation: 1. Bass basket; 2. First bass voice coil; 21. Extension frame; 22. Second bass voice coil; 3. Bass diaphragm; 31. Alignment hole; 32. Sealing ring; 4. Tweeter unit; 41. Tweeter diaphragm; 42. Tweeter voice coil; 43. Tweeter washer; 44. Tweeter magnet; 45. Tweeter basket; 451. Positioning groove; 46. Tweeter yoke; 461. Positioning protrusion; 5. Bass magnetic circuit assembly; 51. Bass yoke; 52. First outer magnet; 53. First inner magnet; 54. Second outer magnet; 55. Second inner magnet; 56. Bass washer; 561. Main body; 562. Bending extension; 563. First support; 564. Second support; 57. First magnetic gap; 58. Second magnetic gap. Detailed Implementation

[0019] To explain in detail the technical content, objectives, and effects of this utility model, the following description is provided in conjunction with the embodiments and accompanying drawings.

[0020] A loudspeaker, including Bass basket 1; The bass diaphragm 3 is fixed to the bass frame 1 on its outer periphery, and the bass diaphragm 3 has a clearance hole 31 in the axial central region. The bass magnetic circuit assembly 5 is fixed to the bass basket 1 and has a first magnetic gap 57 and a second magnetic gap 58 arranged coaxially, and a magnetic saturation region is formed in the axial central region of the two. The first bass voice coil 2 is connected to the bass diaphragm 3 and suspended in the first magnetic gap 57; The extension frame 21 is connected to the first bass voice coil 2 and extends toward the magnetic saturation region; The second bass voice coil 22 is fixed to the end of the extension frame 21 away from the first bass voice coil 2 and suspended in the second magnetic gap 58. The tweeter 4 passes through the clearance hole 31 and is installed in the bass magnetic circuit assembly 5. The tweeter 4 is at least partially located in the magnetic saturation region. The tweeter 4 and the second bass voice coil 22 share the magnetic flux of the magnetic saturation region.

[0021] As can be seen from the above description, the beneficial effects of this utility model are as follows: by opening a clearance hole 31 at the axial center of the bass diaphragm 3, the tweeter 4 is embedded in the magnetic saturation region, so that the center magnetic flux that could not be utilized by the first bass voice coil 2 is transformed into the effective working magnetic flux of the tweeter 4, thereby realizing the reuse of magnetic energy without adding an extra magnet; the second bass voice coil 22 is also located in the magnetic saturation region and shares the magnetic flux with the tweeter 4; the extension frame 21 rigidly connects the first bass voice coil 2 and the second bass voice coil 22 to form a dual voice coil synchronous drive. The dynamic structure allows the same magnetic circuit to simultaneously provide additional driving force for the bass and independent magnetic circuit support for the tweeter, achieving synchronous enhancement of low and high frequencies. The tweeter unit 4 passes through the clearance hole 31 and directly utilizes the magnetic saturation zone space, avoiding the superposition of the tweeter magnetic circuit on the outside of the traditional structure. The overall height of the speaker can be maintained or reduced to meet the requirements of thin-type applications. The clearance hole 31 and the through-mount also provide a radial positioning reference for the tweeter unit 4, reducing the cumulative assembly error, improving the concentricity of the magnetic gap, thereby reducing harmonic distortion caused by eccentricity and improving the consistency of sound quality.

[0022] Furthermore, the bass magnetic circuit assembly 5 includes a bass yoke 51, on which a first outer magnet 52, a first inner magnet 53, a second outer magnet 54, and a second inner magnet 55 are mounted. The first outer magnet 52 is connected to the bass basket 1 and forms a first magnetic gap 57 with the first inner magnet 53. The second outer magnet 54 and the second inner magnet 55 form a second magnetic gap 58.

[0023] As described above, the double-ring coaxial arrangement of the "first outer magnet 52, first inner magnet 53" and the "second outer magnet 54, second inner magnet 55" forms two independent and continuous magnetic circuits within the same magnetic yoke. This provides the first and second bass voice coils 22 with their respective radial magnetic fields, while maintaining the symmetry of the magnetic flux direction and density in the magnetic saturation region, reducing magnetic leakage and harmonic distortion. Structurally, this ensures that the magnetic saturation region can be shared by the tweeter unit 4 and the second bass voice coil 22 without mutual interference.

[0024] Furthermore, it also includes a bass washer 56, which includes a main body 561 and a bent extension 562 connected to the main body 561. The main body 561 is mounted on the top of the first inner magnet 53, and the bent extension 562 is connected to the bottom of the second outer magnet 54.

[0025] As described above, the main body 561 and the bent extension 562 of the bass washer 56 are connected to form a "Z"-shaped magnetic path, which connects the bottom of the second outer magnet 54 and the top of the first inner magnet 53 to form a closed magnetic ring. The bent extension 562 also serves as a structural bridge, reducing the number of parts and enhancing the overall rigidity, preventing the magnetic circuit gap from changing due to vibration, and improving assembly reliability.

[0026] Furthermore, the bass washer 56 also includes a first support portion 563 connected to the main body portion 561, and the first support portion 563 is connected to the bottom of the tweeter 4.

[0027] As described above, the first support 563 directly abuts the bottom of the tweeter 4 against the woofer 56, forming a rigid axial positioning, suppressing the slight wobbling of the tweeter 4 in a strong magnetic environment, ensuring that the tweeter voice coil 42 and the corresponding magnetic gap always remain coaxial, and reducing nonlinear distortion caused by eccentricity.

[0028] Furthermore, the bass washer 56 also includes a second support portion 564 connected to the main body portion 561, the second support portion 564 being connected to the bottom end of the bass diaphragm 3 near the recess hole 31.

[0029] As described above, the second support 564 supports the inner edge of the bass diaphragm 3 at the edge of the relief hole 31, dispersing the concentrated stress of the diaphragm center hole to the bass washer 56, preventing cracks from forming at that location during long-term vibration of the diaphragm, extending the fatigue life of the diaphragm, and maintaining the shape stability of the relief hole 31 to avoid deformation of the aperture affecting the positioning of the tweeter 4.

[0030] Furthermore, a sealing ring 32 is provided at the bottom of the bass diaphragm 3, and the sealing ring 32 is connected to the second support portion 564.

[0031] As described above, the sealing ring 32 is sandwiched between the second support 564 and the bass diaphragm 3, blocking air leakage between the bass rear cavity and the tweeter front cavity, eliminating acoustic short circuits, keeping the bass rear cavity sealed, improving the consistency of low frequency response, and preventing dust or foreign objects from entering the tweeter unit 4 through the clearance hole 31.

[0032] Furthermore, the bass basket 1 is made of magnetically conductive metal.

[0033] As can be seen from the above description, after the bass basket 1 is made of magnetic metal, it forms a continuous magnetic circuit with the bass yoke 51. On the one hand, it further reduces magnetic resistance, and on the other hand, the high thermal conductivity of the metal material can quickly dissipate the heat of the voice coil and magnet, reduce the temperature rise, and improve the power handling capacity.

[0034] Furthermore, the tweeter 4 includes The high-frequency yoke 46 is mounted on top of the low-frequency magnetic circuit assembly 5; The tweeter magnet 44 is installed in the central region of the top of the tweeter yoke 46; The tweeter washer 43 is mounted on top of the tweeter magnet 44; The tweeter frame 45 is installed on the outer edge of the tweeter yoke 46 and passes through the clearance hole 31; The tweeter diaphragm 41 is fixed to the top of the tweeter frame 45 on its outer periphery; The tweeter voice coil 42 is installed at the bottom of the tweeter diaphragm 41 and suspended on the outside of the tweeter washer 43.

[0035] As described above, the tweeter 4 has an independent tweeter yoke 46, tweeter magnet 44, tweeter washer 43 and tweeter voice coil 42, all located within the magnetic saturation region, forming a complete and closed high-frequency magnetic circuit. This independent magnetic circuit is physically isolated from the bass magnetic circuit, avoiding magnetic flux disturbances caused by large bass amplitudes from modulating the high frequencies, thus ensuring high-frequency resolution and dynamic range.

[0036] Furthermore, the outer peripheral edge of the tweeter yoke 46 is provided with a positioning protrusion 461, and the tweeter frame 45 is provided with a positioning groove 451 connected to the positioning protrusion 461; or, the outer peripheral edge of the tweeter yoke 46 is provided with a positioning groove 451, and the tweeter frame 45 is provided with a positioning protrusion 461 connected to the positioning groove 451.

[0037] As described above, the pairing structure of the positioning protrusion 461 and the positioning groove 451 enables precise circumferential positioning of the tweeter frame 45 and the tweeter yoke 46, eliminates assembly rotation errors, ensures the concentricity of the tweeter voice coil 42 and the magnetic gap, reduces performance differences between batches, and improves assembly consistency.

[0038] Furthermore, the tweeter frame 45 is made of magnetically conductive metal.

[0039] As described above, the tweeter frame 45 is made of magnetically conductive metal, which together with the tweeter yoke 46 forms a closed magnetic circuit, further suppressing magnetic leakage. At the same time, the heat dissipation capacity of the metal frame reduces the temperature rise of the tweeter magnetic circuit and improves the stability of high-frequency continuous power.

[0040] Embodiment 1 of this utility model is as follows: Please refer to Figure 1 A speaker suitable for applications where thickness is extremely sensitive, such as mobile phones, tablets, laptops, ultra-thin TVs, TWS charging boxes, AR / VR glasses, smart home control systems, and in-vehicle mini speakers, providing a high-fidelity full-range sound solution for compact spaces.

[0041] Please combine Figure 2 and Figure 3The loudspeaker includes a bass basket 1, a bass diaphragm 3, a bass magnetic circuit assembly 5, a first bass voice coil 2, an extension frame 21, a second bass voice coil 22, and a tweeter 4. The outer periphery of the bass diaphragm 3 is fixed to the bass basket 1, and a clearance hole 31 is provided in the axial central region of the bass diaphragm 3. The bass magnetic circuit assembly 5 is fixed to the bass basket 1 and has a first magnetic gap 57 and a second magnetic gap 58 arranged coaxially, forming a magnetic saturation region in their axial central regions. The first bass voice coil 2 is connected to the bass diaphragm 3 and suspended in the first magnetic gap 57. The extension frame 21 is connected to the first bass voice coil 2 and extends towards the magnetic saturation region. The second bass voice coil 22 is fixed to the end of the extension frame 21 away from the first bass voice coil 2 and suspended in the second magnetic gap 58. The tweeter 4 passes through the clearance hole 31 and is installed in the bass magnetic circuit assembly 5. The tweeter 4 is at least partially located within the magnetic saturation region, and the tweeter 4 and the second bass voice coil 22 share the magnetic flux of the magnetic saturation region.

[0042] It should be noted that the magnetic saturation region refers to the axial center region between the first magnetic gap 57 and the second magnetic gap 58 in the bass magnetic circuit assembly 5. In this region, the magnetic flux density reaches or approaches the saturation magnetic flux density of the magnet material used, so that it can no longer effectively increase the driving force on the first bass voice coil 2. Thus, it becomes a spatial region that contributes very little to the bass unit, but the magnetic flux still objectively exists.

[0043] Please combine Figure 4 and Figure 5 The bass magnetic circuit assembly 5 includes a bass yoke 51, on which a first outer magnet 52, a first inner magnet 53, a second outer magnet 54, and a second inner magnet 55 are mounted. The first outer magnet 52 is connected to the bass frame 1 and forms a first magnetic gap 57 with the first inner magnet 53. The second outer magnet 54 and the second inner magnet 55 form a second magnetic gap 58. Through the double-ring coaxial arrangement of the "first outer magnet 52, first inner magnet 53" and the "second outer magnet 54, second inner magnet 55", two independent and continuous magnetic circuits are formed in the same magnetic yoke. This provides the first and second bass voice coils 22 with their respective radial magnetic fields, and keeps the magnetic flux direction and density in the magnetic saturation area symmetrical, reducing magnetic leakage and harmonic distortion. Thus, structurally, the magnetic saturation area can be shared by the tweeter 4 and the second bass voice coil 22 without mutual interference.

[0044] Specifically, the bass magnetic circuit assembly 5 further includes a bass washer 56, which includes a main body 561 and a bent extension 562 connected to the main body 561. The main body 561 is mounted on the top of the first inner magnet 53, and the bent extension 562 is connected to the bottom of the second outer magnet 54. Please refer to... Figure 3 The main body 561 of the bass washer 56 and the bent extension 562 are connected to form a "Z"-shaped magnetic path, which connects the bottom of the second outer magnet 54 and the top of the first inner magnet 53 to form a closed magnetic ring. The bent extension 562 also serves as a structural bridge, reducing the number of parts and enhancing the overall rigidity, preventing the magnetic circuit gap from changing due to vibration, and improving assembly reliability.

[0045] Please combine Figure 4 The bass washer 56 further includes a first support portion 563 connected to the main body 561. The first support portion 563 is connected to the bottom of the tweeter 4, and directly abuts the bottom of the tweeter 4 against the bass washer 56, forming a rigid axial positioning, suppressing the slight wobbling of the tweeter 4 in a strong magnetic environment, ensuring that the tweeter voice coil 42 and the corresponding magnetic gap always remain coaxial, and reducing nonlinear distortion caused by eccentricity. Furthermore, the bass washer 56 also includes a second support portion 564 connected to the main body 561. The second support portion 564 is connected to the bottom of the bass diaphragm 3 near the recess hole 31. The second support portion 564 is located next to the recess hole 31. The inner edge of the bass diaphragm 3 is supported, and the concentrated stress at the relief hole 31 of the bass diaphragm 3 is distributed to the bass washer 56, preventing cracks from forming at this location during long-term vibration of the diaphragm, extending the fatigue life of the diaphragm, and maintaining the shape stability of the relief hole 31 to avoid deformation of the aperture affecting the positioning of the tweeter 4. In detail, the bottom of the bass diaphragm 3 is also provided with a sealing ring 32, which is connected to the second support part 564. The sealing ring 32 is sandwiched between the second support part 564 and the bass diaphragm 3, blocking air leakage between the bass rear cavity and the tweeter front cavity, eliminating acoustic short circuits, keeping the bass rear cavity sealed, improving the consistency of low-frequency response, and preventing dust or foreign objects from entering the tweeter 4 through the relief hole 31.

[0046] In this embodiment, the bass frame 1 is made of magnetically conductive metal. When the bass frame 1 is made of magnetically conductive metal, it forms a continuous magnetic circuit with the bass yoke 51. On the one hand, this further reduces magnetic resistance, and on the other hand, the high thermal conductivity of the metal material can quickly dissipate the heat from the voice coil and magnet, reducing temperature rise and improving power handling capacity.

[0047] Please combine Figure 2 and Figure 6The tweeter unit 4 includes a tweeter yoke 46, a tweeter magnet 44, a tweeter washer 43, a tweeter frame 45, a tweeter diaphragm 41, and a tweeter voice coil 42. The tweeter yoke 46 is mounted on top of the bass magnetic circuit assembly 5. The tweeter magnet 44 is mounted in the center region of the top of the tweeter yoke 46. The tweeter washer 43 is mounted on top of the tweeter magnet 44. The tweeter frame 45 is mounted on the outer edge of the tweeter yoke 46 and passes through the clearance hole 31. The outer periphery of the tweeter diaphragm 41... The tweeter is fixed to the top of the tweeter frame 45; the tweeter voice coil 42 is installed at the bottom of the tweeter diaphragm 41 and suspended on the outside of the tweeter washer 43. The tweeter unit 4 has an independent tweeter yoke 46, tweeter magnet 44, tweeter washer 43 and tweeter voice coil 42, all located in the magnetic saturation region, forming a complete and closed high-frequency magnetic circuit. This independent magnetic circuit is physically isolated from the bass magnetic circuit to avoid magnetic flux disturbance caused by large bass amplitude from modulating the high frequency, ensuring high frequency resolution and dynamic range.

[0048] Optionally, the outer peripheral edge of the tweeter yoke 46 is provided with a positioning protrusion 461, and the tweeter frame 45 is provided with a positioning groove 451 that connects to the positioning protrusion 461 (e.g., Figure 6 (As shown in the figure). In addition, in some other embodiments, a positioning groove can be provided on the outer peripheral edge of the tweeter yoke 46, and the tweeter frame 45 is provided with a positioning protrusion connected to the positioning groove. It can be understood that the pairing structure of the positioning protrusion 461 and the positioning groove 451 realizes the precise circumferential positioning of the tweeter frame 45 and the tweeter yoke 46, eliminates assembly rotation errors, ensures the concentricity of the tweeter voice coil 42 and the magnetic gap, reduces the performance difference between batches, and improves assembly consistency. Further optionally, the tweeter frame 45 is made of magnetically conductive metal. The tweeter frame 45, made of magnetically conductive metal, together with the tweeter yoke 46, forms a closed magnetic circuit, further suppressing magnetic leakage. At the same time, the heat dissipation capacity of the metal frame reduces the temperature rise of the tweeter magnetic circuit and improves the stability of high-frequency continuous power.

[0049] In summary, the speaker provided by this utility model, by opening a clearance hole at the axial center of the bass diaphragm, embeds the tweeter unit into the magnetic saturation zone, transforming the center magnetic flux that was originally unusable by the first bass voice coil into the effective working magnetic flux of the tweeter unit, thereby achieving magnetic energy reuse without adding additional magnets. The second bass voice coil is also located within the magnetic saturation zone and shares the magnetic flux with the tweeter unit. The extended frame rigidly connects the first and second bass voice coils, forming a dual voice coil synchronous drive structure, allowing the same magnetic circuit to simultaneously provide additional driving force for the bass and independent magnetic circuit support for the tweeter, achieving synchronous enhancement of low and high frequencies. The tweeter unit passes through the clearance hole and directly utilizes the space of the magnetic saturation zone, avoiding the superposition of the tweeter magnetic circuit on the outside of the traditional structure, thus maintaining or reducing the overall height of the speaker and meeting the requirements of thin-type applications. The clearance hole and through-mount also provide a radial positioning reference for the tweeter unit, reducing cumulative assembly errors, improving the concentricity of the magnetic gap, thereby reducing harmonic distortion caused by eccentricity and improving sound quality consistency.

[0050] The above description is merely an embodiment of this utility model and does not limit the patent scope of this utility model. Any equivalent modifications made based on the content of this utility model specification and drawings, or direct or indirect applications in related technical fields, are similarly included within the patent protection scope of this utility model.

Claims

1. A loudspeaker, characterized in that, include Bass basket; A bass diaphragm is fixed to the bass frame on its outer periphery, and a clearance hole is provided in the axial central region of the bass diaphragm. The bass magnetic circuit assembly, fixed to the bass basket, has a first magnetic gap and a second magnetic gap arranged coaxially, and forms a magnetic saturation region in the axial central region of the two. The first bass voice coil is connected to the bass diaphragm and suspended in the first magnetic gap; An extended frame is connected to the first bass voice coil and extends toward the magnetic saturation region; The second bass voice coil is fixed to the end of the extended frame away from the first bass voice coil and suspended in the second magnetic gap; A tweeter unit passes through the clearance hole and is mounted on the bass magnetic circuit assembly. The tweeter unit is at least partially located within the magnetic saturation region. The tweeter unit and the second bass voice coil share the magnetic flux of the magnetic saturation region.

2. The loudspeaker according to claim 1, characterized in that, The bass magnetic circuit assembly includes a bass yoke, on which a first outer magnet, a first inner magnet, a second outer magnet, and a second inner magnet are mounted. The first outer magnet is connected to the bass frame and forms a first magnetic gap with the first inner magnet. The second outer magnet and the second inner magnet form a second magnetic gap.

3. The loudspeaker according to claim 2, characterized in that, It also includes a bass washer, which includes a main body and a bent extension connected to the main body. The main body is mounted on the top of the first inner magnet, and the bent extension is connected to the bottom of the second outer magnet.

4. The loudspeaker according to claim 3, characterized in that, The bass washer also includes a first support portion connected to the main body portion, the first support portion being connected to the bottom of the tweeter unit.

5. The loudspeaker according to claim 3, characterized in that, The bass washer also includes a second support portion connected to the main body portion, the second support portion being connected to the bottom end of the bass diaphragm near the recess hole.

6. The loudspeaker according to claim 5, characterized in that, The bottom of the bass diaphragm is also provided with a sealing ring, which is connected to the second support portion.

7. The loudspeaker according to claim 2, characterized in that, The bass basket is made of magnetically conductive metal.

8. The loudspeaker according to claim 1, characterized in that, The tweeter unit includes A high-frequency yoke is mounted on top of the low-frequency magnetic circuit assembly; A high-frequency magnet is installed in the central region of the top of the high-frequency yoke; A tweeter washer is installed on top of the tweeter magnet; A tweeter frame is installed on the outer edge of the tweeter yoke and passes through the clearance hole; The tweeter diaphragm is fixed to the top of the tweeter frame on its outer periphery; The tweeter voice coil is installed at the bottom of the tweeter diaphragm and suspended on the outside of the tweeter washer.

9. The loudspeaker according to claim 8, characterized in that, The outer peripheral edge of the tweeter yoke is provided with a positioning protrusion, and the tweeter diaphragm is provided with a positioning groove connected to the positioning protrusion; or, the outer peripheral edge of the tweeter yoke is provided with a positioning groove, and the tweeter diaphragm is provided with a positioning protrusion connected to the positioning groove.

10. The loudspeaker according to claim 8, characterized in that, The tweeter frame is made of magnetically conductive metal.

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