Sound production loudspeaker with single magnetic circuit

Abstract

The utility model relates to the technical field of sounding horns, in particular to a sounding horn with a single magnetic circuit, which comprises a support, a vibrating diaphragm, a voice coil, an annular insert and a single magnetic circuit mechanism, the vibrating diaphragm covers the top of the support, the top end of the voice coil is attached to the vibrating diaphragm, the bottom end of the voice coil movably extends into the single magnetic circuit mechanism, and the annular insert is embedded in the inner ring wall of the support. The single magnetic circuit mechanism is embedded in the inner ring wall of the annular insert, the top of the annular insert is provided with a first annular sounding groove, the first annular sounding groove is provided with a plurality of first sounding holes distributed at intervals, and the plurality of first sounding holes distributed at intervals are utilized to reduce the rear damping of the rear cavity of the vibrating diaphragm, thereby facilitating the improvement of the medium-high frequency band SPL of the sounding loudspeaker, and improving the sound quality of the sounding loudspeaker. A traditional double-magnetic-circuit sound production loudspeaker is replaced, the cost of the single-magnetic-circuit sound production loudspeaker adopting the annular insert is lower than that of the traditional double-magnetic-circuit sound production loudspeaker, and the requirements of the market for low cost of the sound production loudspeaker and high SPL in middle and high frequency bands can be met.

Description

Technical Field

[0001] This utility model relates to the field of loudspeaker technology, specifically to a single magnetic circuit loudspeaker. Background Technology

[0002] Traditional single-magnetic-circuit loudspeakers typically use a single magnet (or a single magnetic pole) to drive the voice coil, resulting in a unidirectional magnetic field. However, they are simple in structure and low in cost. Dual-magnetic-circuit loudspeakers, on the other hand, usually use an inner magnetic ring, an inner washer, an outer magnetic ring, and an outer washer to create a more uniform magnetic field. The voice coil vibrates more fully in a uniform magnetic field, improving energy conversion efficiency and thus enhancing the SPL (sound pressure level) in the mid-to-high frequency range.

[0003] However, the dual-magnetic-circuit structure design of the dual-magnetic-circuit speaker requires high material costs, resulting in a higher overall cost compared to the single-magnetic-circuit speaker, which is not conducive to meeting market demands. Summary of the Invention

[0004] In order to overcome the shortcomings and deficiencies of the existing technology, the purpose of this utility model is to provide a single magnetic circuit speaker.

[0005] The objective of this utility model is achieved through the following technical solution: a single magnetic circuit loudspeaker, comprising a bracket, a diaphragm, a voice coil, an annular insert, and a single magnetic circuit mechanism. The diaphragm is placed on top of the bracket, the top of the voice coil is attached to the diaphragm, and the bottom of the voice coil extends movably into the single magnetic circuit mechanism. The annular insert is embedded in the inner ring wall of the bracket, and the single magnetic circuit mechanism is embedded in the inner ring wall of the annular insert. The top of the annular insert has a first annular sound outlet groove, and the first annular sound outlet groove has a plurality of spaced first sound outlet holes.

[0006] Preferably, the annular insert is an injection-molded plastic insert.

[0007] Preferably, the first sound outlet is a circular hole, and the bottom of the annular insert is annularly fitted with a first tuning paper.

[0008] Preferably, the bracket has a second annular sound outlet groove, and the second annular sound outlet groove has a plurality of spaced second sound outlet holes.

[0009] Preferably, the second sound outlet is an arc-shaped strip hole; a second tuning paper is attached to the bottom of the second sound outlet of the bracket.

[0010] Preferably, the top periphery of the bracket is provided with an annular groove, and the outer periphery of the diaphragm is attached to the annular groove.

[0011] Preferably, the top inner ring of the bracket extends with a first limiting abutment, and the top outer periphery of the annular insert is fitted with the first limiting abutment.

[0012] Preferably, the single magnetic circuit mechanism includes a U-shaped iron embedded in the inner ring wall of the annular insert, a magnet ring housed in the inner cavity of the U-shaped iron, and an annular washer attached to the top of the magnet ring. There are gaps between the inner wall of the U-shaped iron and the outer wall of the magnet ring, and between the inner wall of the U-shaped iron and the outer wall of the annular washer, for the voice coil to extend into.

[0013] Preferably, the top inner ring of the annular insert has a second limiting plate extending therefrom, and the top outer periphery of the U-shaped iron has an annular limiting groove that fits with the second limiting plate.

[0014] Preferably, a third sound outlet is provided at the bottom of the U-shaped iron; a third tuning paper is attached to the bottom of the third sound outlet of the U-shaped iron.

[0015] The beneficial effects of this utility model are as follows: The single-magnetic-circuit speaker of this utility model adopts a bracket, a diaphragm, a voice coil, an annular insert, and a single-magnetic-circuit mechanism. The diaphragm is covered on the top of the bracket, the top of the voice coil is attached to the diaphragm, and the bottom of the voice coil extends movably into the single-magnetic-circuit mechanism. The annular insert is embedded in the inner ring wall of the bracket, and the single-magnetic-circuit mechanism is embedded in the inner ring wall of the annular insert. The top of the annular insert has a first annular sound outlet groove, and the first annular sound outlet groove has multiple spaced-apart first sound outlet holes. The multiple spaced-apart first sound outlet holes reduce the back damping of the diaphragm's rear cavity, which is beneficial to improving the mid-to-high frequency SPL of the speaker. It replaces the traditional dual-magnetic-circuit speaker, and the cost of the single-magnetic-circuit speaker using the annular insert is lower than that of the traditional dual-magnetic-circuit speaker, which is conducive to meeting the market demand for low-cost speakers with high mid-to-high frequency SPL. Attached Figure Description

[0016] Figure 1 This is a schematic diagram of the structure of this utility model;

[0017] Figure 2 This is an exploded view of the present invention;

[0018] Figure 3 This is an exploded view of the present invention from another perspective;

[0019] Figure 4 This is a top view of the present invention;

[0020] Figure 5 yes Figure 4 Cross-sectional view of AA;

[0021] Figure 6This is a frequency response graph of the sound pressure level tested by this utility model. The horizontal axis represents the frequency points, ranging from 20 to 20000, in Hz; the vertical axis represents the sound pressure level in decibels, ranging from 70 to 138, in dB; curve a represents the test result of the single magnetic circuit speaker in this embodiment, and curve b represents the test result of the traditional dual magnetic circuit speaker.

[0022] The attached figures are labeled as follows: 1. Support; 2. Diaphragm; 3. Voice coil; 4. Annular insert; 5. Single magnetic circuit mechanism; 51. U-shaped iron; 52. Magnet ring; 53. Annular washer; 6. First annular sound outlet groove; 7. First sound outlet hole; 8. First tuning paper; 9. Second annular sound outlet groove; 10. Second sound outlet hole; 11. Second tuning paper; 12. Annular groove; 13. First limiting plate; 14. Second limiting plate; 15. Annular limiting groove; 16. Third sound outlet hole; 17. Third tuning paper. Detailed Implementation

[0023] To facilitate understanding by those skilled in the art, the present invention will be further described below with reference to embodiments and accompanying drawings. The content mentioned in the embodiments is not intended to limit the present invention.

[0024] like Figure 1-5 As shown, a single magnetic circuit loudspeaker includes a bracket 1, a diaphragm 2, a voice coil 3, an annular insert 4, and a single magnetic circuit mechanism 5. The diaphragm 2 is placed on top of the bracket 1, the top of the voice coil 3 is attached to the diaphragm 2, and the bottom of the voice coil 3 extends movably into the single magnetic circuit mechanism 5. The annular insert 4 is embedded in the inner annular wall of the bracket 1, and the single magnetic circuit mechanism 5 is embedded in the inner annular wall of the annular insert 4. The top of the annular insert 4 has a first annular sound outlet groove 6, and the first annular sound outlet groove 6 has a plurality of spaced first sound outlet holes 7.

[0025] This single-magnetic-circuit speaker utilizes multiple spaced-apart first sound outlets 7 to reduce the back damping of the diaphragm's rear cavity, which helps improve the mid-to-high frequency SPL of the speaker. It replaces traditional dual-magnetic-circuit speakers, and the cost of the single-magnetic-circuit speaker using the annular insert 4 is lower than that of the traditional dual-magnetic-circuit speaker, thus meeting the market demand for low-cost speakers with high mid-to-high frequency SPL. It should be noted that the rear cavity of the diaphragm refers to the cavity area enclosed by the bottom of the diaphragm 2, the outer side of the voice coil 3, and the support 1.

[0026] Furthermore, the annular insert 4 is an injection-molded plastic insert. Its cost is lower than that of traditional dual-magnetic-circuit speakers combining an outer magnetic ring and an outer washer, and it is easier to injection mold; in this embodiment, the injection-molded plastic insert is an ABS plastic insert.

[0027] Furthermore, the first sound outlet 7 is a circular hole, and a first tuning paper 8 is annularly attached to the bottom of the annular insert 4. The first tuning paper 8 is mainly used to control the air intake size of the first sound outlet 7 of the annular insert 4 when the diaphragm 2 vibrates, thereby achieving the effect of adjusting the sound. Preferably, the multiple first sound outlets 7 are evenly distributed in an annular shape.

[0028] Furthermore, the bracket 1 has a second annular sound outlet groove 9, and the second annular sound outlet groove 9 has a plurality of spaced second sound outlet holes 10. Preferably, the plurality of second sound outlet holes 10 are evenly distributed in an annular shape.

[0029] Furthermore, the second sound outlet 10 is an arc-shaped strip hole; a second tuning paper 11 is attached to the bottom of the second sound outlet 10 of the bracket 1. The second sound outlet 10 of the bracket 1 ensures basic connectivity of the rear cavity of the diaphragm, and the second tuning paper 11 is mainly used to control the air intake of the second sound outlet 10 of the bracket 1 when the diaphragm 2 vibrates, thereby achieving the effect of adjusting the sound.

[0030] Furthermore, an annular groove 12 is provided on the top periphery of the bracket 1, and the outer periphery of the diaphragm 2 is attached to the annular groove 12.

[0031] Furthermore, the top inner ring of the bracket 1 extends with a first limiting plate 13, and the top outer periphery of the annular insert 4 fits against the first limiting plate 13, which facilitates the quick positioning and engagement of the annular insert 4 with the first limiting plate 13 when it is installed into the bracket 1, thereby improving assembly efficiency.

[0032] Furthermore, the single magnetic circuit mechanism 5 includes a U-shaped iron 51 embedded in the inner ring wall of the annular insert 4, a magnet ring 52 housed in the inner cavity of the U-shaped iron 51, and an annular washer 53 attached to the top of the magnet ring 52. There are gaps between the inner wall of the U-shaped iron 51 and the outer wall of the magnet ring 52, and between the inner wall of the U-shaped iron 51 and the outer wall of the annular washer 53, for the voice coil 3 to extend into.

[0033] Furthermore, the top inner ring of the annular insert 4 has a second limiting plate 14 extending outward, and the top outer periphery of the U-iron 51 has an annular limiting groove 15 that fits with the second limiting plate 14, which facilitates the quick positioning and engagement of the U-iron 51 with the second limiting plate 14 when it is inserted into the annular insert 4, thereby improving assembly efficiency.

[0034] Furthermore, a third sound outlet 16 is provided at the bottom of the U-shaped iron 51; a third tuning paper 17 is attached to the bottom of the third sound outlet 16 of the U-shaped iron 51.

[0035] With the speaker height remaining constant, using the single-magnetic-circuit speaker of this embodiment and a traditional dual-magnetic-circuit speaker as samples, their sound pressure output capabilities at different frequencies were tested, and the sound pressure level frequency response diagrams are shown below. Figure 6As shown in the figure, the single-magnetic-circuit speaker is about 2dB louder than the traditional dual-magnetic-circuit speaker in the 4000Hz-8000Hz frequency range.

[0036] The above embodiments are preferred implementations of this utility model. In addition, this utility model can also be implemented in other ways. Any obvious substitutions without departing from the concept of this utility model are within the protection scope of this utility model.

Claims

1. A single-magnetic-circuit loudspeaker, characterized in that: The device includes a support, a diaphragm, a voice coil, an annular insert, and a single magnetic circuit mechanism. The diaphragm is placed on top of the support, the top of the voice coil is attached to the diaphragm, and the bottom of the voice coil extends movably into the single magnetic circuit mechanism. The annular insert is embedded in the inner ring wall of the support, and the single magnetic circuit mechanism is embedded in the inner ring wall of the annular insert. The top of the annular insert has a first annular sound outlet groove, and the first annular sound outlet groove has multiple spaced first sound outlet holes.

2. The single-magnetic-circuit speaker according to claim 1, characterized in that: The annular insert is an injection-molded plastic insert.

3. A single-magnetic-circuit horn according to claim 1, characterized in that: The first sound outlet is a round hole, and the bottom of the annular insert is annularly fitted with a first tuning paper.

4. A single-magnetic-circuit loudspeaker according to claim 1, characterized in that: The bracket has a second annular sound outlet groove, and the second annular sound outlet groove has a plurality of spaced second sound outlet holes.

5. A single-magnetic-circuit speaker according to claim 4, characterized in that: The second sound outlet is an arc-shaped strip hole; a second tuning paper is attached to the bottom of the second sound outlet of the bracket.

6. A single-magnetic-circuit horn according to claim 1, characterized in that: The top periphery of the bracket is provided with an annular groove, and the outer periphery of the diaphragm is attached to the annular groove.

7. A single-magnetic-circuit loudspeaker according to claim 1, characterized in that: The top inner ring of the bracket extends with a first limiting plate, and the top outer periphery of the annular insert is in contact with the first limiting plate.

8. A single-magnetic-circuit horn according to claim 1, characterized in that: The single magnetic circuit mechanism includes a U-shaped iron embedded in the inner ring wall of the annular insert, a magnet ring housed in the inner cavity of the U-shaped iron, and an annular washer attached to the top of the magnet ring. There are gaps between the inner wall of the U-shaped iron and the outer wall of the magnet ring, and between the inner wall of the U-shaped iron and the outer wall of the annular washer for the voice coil to extend into.

9. A single-magnetic-circuit horn according to claim 8, characterized in that: The top inner ring of the annular insert has a second limiting plate extending therefrom, and the top outer periphery of the U-shaped iron has an annular limiting groove that fits with the second limiting plate.

10. A single-magnetic-circuit horn according to claim 8, characterized in that: The bottom of the U-shaped iron is provided with a third sound outlet; a third tuning paper is attached to the bottom of the third sound outlet of the U-shaped iron.

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