Loudspeaker with independent sound cavity
By designing the frame, diaphragm, voice coil, magnetic circuit mechanism, and rear cavity, an independent sound cavity is formed and a sound outlet is set, which solves the problems of insufficient low-frequency resonance and air leakage in traditional loudspeakers, and achieves better low-frequency response and sound field uniformity.
Patent Information
- Authority / Receiving Office
- CN · China
- Patent Type
- Utility models(China)
- Current Assignee / Owner
- Filing Date
- 2025-05-09
- Publication Date
- 2026-04-07
AI Technical Summary
Traditional loudspeakers with no enclosure or open design cause low-frequency energy to spread outwards, making it difficult to form effective resonance. This results in insufficient low-frequency extension and a muddy sound. Adding a box cavity can lead to air leakage and poor sound field uniformity.
It adopts a design of frame, diaphragm, voice coil, magnetic circuit mechanism and rear cavity. The rear cavity is sealed and welded to the perimeter of the frame to form an independent sound cavity. Sound outlet holes are set on the side and bottom of the rear cavity to reduce the equivalent acoustic impedance, promote low frequency energy radiation and form a three-dimensional sound field.
It effectively avoids air leakage, improves low-frequency response and sound field uniformity, extends low-frequency depth, improves sound stereo effect and diffusion, and enhances product quality.
Smart Images
Figure CN224097845U_ABST
Abstract
Description
Technical Field
[0001] This utility model relates to the field of loudspeaker technology, specifically to a loudspeaker with an independent sound cavity. Background Technology
[0002] Loudspeakers are commonly known as "horns".
[0003] Traditional loudspeakers with no enclosure or open design cause low-frequency energy to diffuse freely in all directions, making it difficult to form effective resonance, resulting in insufficient low-frequency extension and a tendency to become muddy. To improve these problems, users usually need to add a box cavity to the loudspeaker. However, the added box cavity is prone to air leakage, poor sound field uniformity, and poor low-frequency diffusion, which cannot meet the user's needs. 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 loudspeaker with an independent sound cavity.
[0005] The objective of this utility model is achieved through the following technical solution: A loudspeaker with an independent acoustic cavity includes a frame, a diaphragm, a voice coil, a magnetic circuit mechanism, and a rear cavity. The diaphragm is placed on the top of the frame, the top of the voice coil is attached to the diaphragm, and the bottom of the voice coil extends movably into the magnetic circuit mechanism. The magnetic circuit mechanism is embedded in the inner ring wall of the frame. The rear cavity is covered and sealed by welding to the periphery of the frame. An independent acoustic cavity is formed between the inner cavity of the rear cavity and the bottom of the frame. A first sound outlet is provided on the side of the rear cavity, and a second sound outlet is provided at the bottom of the rear cavity.
[0006] Preferably, the periphery of the basin frame has a welded portion, and the outer periphery of the rear cavity is ultrasonically welded to the welded portion.
[0007] Preferably, there are two first sound outlet holes, which are spaced apart; the first sound outlet holes are arc-shaped strip holes.
[0008] Preferably, the outer surface of the rear cavity is fitted with a first tuning paper covering the first sound outlet, and the bottom surface of the rear cavity is fitted with a second tuning paper covering the second sound outlet.
[0009] Preferably, the top of the basin frame is provided with a first annular sound outlet groove, and the first annular sound outlet groove is provided with a plurality of first sound outlet channels distributed at intervals, and the first annular sound outlet groove, the first sound outlet channels and the independent sound cavity are connected in sequence.
[0010] Preferably, the first sound outlet channel is an arc-shaped perforation; the bottom of the frame is fitted with a third tuning paper covering the first sound outlet channel.
[0011] Preferably, the magnetic circuit mechanism includes an annular insert embedded in the inner ring wall of the frame, 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. The inner wall of the U-shaped iron and the outer wall of the magnet ring, as well as the inner wall of the U-shaped iron and the outer wall of the annular washer, have gaps for the voice coil to extend into.
[0012] Preferably, the top of the annular insert is provided with a second annular sound outlet groove, the second annular sound outlet groove is provided with a plurality of spaced second sound outlet channels, and the second annular sound outlet groove, the second sound outlet channels and the independent sound cavity are connected in sequence.
[0013] Preferably, the second sound outlet channel is a circular hole, and the bottom of the annular insert is annularly fitted with a fourth tuning paper covering the second sound outlet channel.
[0014] The beneficial effects of this utility model are as follows: The loudspeaker with an independent sound cavity of this utility model adopts a frame, diaphragm, voice coil, magnetic circuit mechanism, and rear cavity. The diaphragm is covered on the top of the frame, the top of the voice coil is attached to the diaphragm, and the bottom of the voice coil extends movably into the magnetic circuit mechanism, which is embedded in the inner ring wall of the frame. The rear cavity is covered and sealed by welding to the periphery of the frame, and an independent sound cavity is formed between the inner cavity of the rear cavity and the bottom of the frame. A first sound outlet is opened on the side of the rear cavity, and a second sound outlet is opened on the bottom of the rear cavity. Covering and sealing the rear cavity by welding it to the periphery of the frame makes the inner cavity of the rear cavity and the bottom of the frame form an independent sound cavity, avoiding the rear cavity from being directly attached to the frame. In contrast to adhesive sealing, this invention employs sealed welding, which effectively prevents air leakage due to adhesive detachment after a period of use, thus improving product quality. Furthermore, the rear cavity has a first sound outlet on its side and a second sound outlet on its bottom, effectively reducing the equivalent acoustic impedance of the independent sound cavity. This allows low-frequency energy to radiate more effectively into the external space, extending the low-frequency response. The sound waves diffuse towards the first sound outlet of the rear cavity, complementing the downward radiation from the second sound outlet on the bottom surface. This reduces excessive concentration of sound in the vertical direction, resulting in a more three-dimensional sound field with more uniform diffusion, effectively improving low-frequency extension, sound field uniformity, and efficiency, meeting user needs. Attached Figure Description
[0015] Figure 1 This is a schematic diagram of the structure of this utility model;
[0016] Figure 2 This is an exploded view of the present invention;
[0017] Figure 3 This is an exploded view of the present invention from another perspective;
[0018] Figure 4 This is a top view of the present invention;
[0019] Figure 5 yes Figure 4 Cross-sectional view of AA.
[0020] The attached figures are labeled as follows: 1. Bass frame; 2. Diaphragm; 3. Voice coil; 4. Magnetic circuit mechanism; 41. Annular insert; 42. U-shaped iron; 43. Magnet ring; 44. Annular washer; 5. Rear cavity; 6. Independent sound cavity; 7. First sound outlet; 8. Second sound outlet; 9. Welding part; 10. First tuning paper; 11. Second tuning paper; 12. First annular sound outlet groove; 13. First sound outlet channel; 14. Third tuning paper; 15. Second annular sound outlet groove; 16. Second sound outlet channel; 17. Fourth tuning paper. Detailed Implementation
[0021] 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.
[0022] like Figure 1-5 As shown, a loudspeaker with an independent acoustic cavity includes a frame 1, a diaphragm 2, a voice coil 3, a magnetic circuit mechanism 4, and a rear cavity 5. The diaphragm 2 covers the top of the frame 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 magnetic circuit mechanism 4. The magnetic circuit mechanism 4 is embedded in the inner ring wall of the frame 1. The rear cavity 5 covers and is sealed and welded to the periphery of the frame 1. An independent acoustic cavity 6 is formed between the inner cavity of the rear cavity 5 and the bottom of the frame 1. A first sound outlet 7 is opened on the side of the rear cavity 5, and a second sound outlet 8 is opened at the bottom of the rear cavity 5.
[0023] This loudspeaker with an independent acoustic cavity has its rear cavity 5 covered and sealed welded to the periphery of the frame 1, forming an independent acoustic cavity 6 between the inner cavity of the rear cavity 5 and the bottom of the frame 1. This avoids gaps between the rear cavity 5 and the frame 1 that could cause air leakage. Compared to using adhesive for sealing, this invention uses sealed welding, which effectively avoids the problem of delamination and air leakage after a period of use, thus improving product quality. In addition, the rear cavity 5 has a first sound outlet 7 on its side and a second sound outlet 8 on its bottom, which can effectively reduce the equivalent acoustic impedance of the independent acoustic cavity 6, allowing low-frequency energy to radiate more effectively into the external space, thereby extending the low-frequency response. It also allows sound waves to diffuse towards the first sound outlet 7 of the rear cavity 5, complementing the downward radiation of the second sound outlet 8 on the bottom surface. This reduces excessive concentration of sound in the vertical direction, resulting in a more three-dimensional sound field and more uniform diffusion, effectively improving low-frequency extension, sound field uniformity, and efficiency.
[0024] Furthermore, the basin frame 1 has a welded portion 9 protruding from its periphery, and the outer periphery of the rear cavity 5 is ultrasonically welded to the welded portion 9. This eliminates the need for the user to use glue for bonding, effectively preventing the problem of air leakage caused by gaps between the rear cavity 5 and the basin frame 1 due to glue detachment after a period of use.
[0025] Furthermore, there are two first sound outlet holes 7, spaced apart; the first sound outlet hole 7 is an arc-shaped strip hole. This effectively reduces the equivalent acoustic impedance of the independent sound cavity 6, allowing low-frequency energy to radiate more effectively into the external space, thereby extending the low-frequency response and forming a three-dimensional sound field distribution in conjunction with the second sound outlet hole 8.
[0026] Furthermore, a first tuning paper 10 covering the first sound outlet 7 is attached to the outer surface of the rear cavity 5, and a second tuning paper 11 covering the second sound outlet 8 is attached to the bottom surface of the rear cavity 5. The first tuning paper 10 and the second tuning paper 11 themselves have uniform density, evenly spaced pores, good thickness consistency, and good waterproof effect, which are used to dampen sound waves and are extremely effective in suppressing sound spikes and improving sound frequency characteristics.
[0027] Furthermore, the top of the frame 1 is provided with a first annular sound outlet groove 12, and the first annular sound outlet groove 12 is provided with a plurality of spaced first sound outlet channels 13. The first annular sound outlet groove 12, the first sound outlet channels 13 and the independent sound cavity 6 are connected in sequence. This ensures that the rear cavity of the diaphragm is connected to the independent sound cavity 6 through the first annular sound outlet groove 12 and the first sound outlet channels 13. 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 frame 1.
[0028] Furthermore, the first sound outlet channel 13 is an arc-shaped perforation; a third tuning paper 14 covering the first sound outlet channel 13 is attached to the bottom of the speaker frame 1. In practical applications, the third tuning paper 14 covering the first sound outlet channel 13 can be attached to the bottom of the speaker frame 1 according to actual needs, so that the sound can be tuned from inside the speaker.
[0029] Furthermore, the magnetic circuit mechanism 4 includes an annular insert 41 embedded in the inner ring wall of the frame 1, a U-shaped iron 42 embedded in the inner ring wall of the annular insert 41, a magnet ring 43 housed in the inner cavity of the U-shaped iron 42, and an annular washer 44 attached to the top of the magnet ring 43. There are gaps between the inner wall of the U-shaped iron 42 and the outer wall of the magnet ring 43, and between the inner wall of the U-shaped iron 42 and the outer wall of the annular washer 44 for the voice coil 3 to extend into.
[0030] Furthermore, the top of the annular insert 41 is provided with a second annular sound outlet groove 15, and the second annular sound outlet groove 15 has multiple spaced-apart second sound outlet channels 16, which are sequentially connected to the second annular sound outlet groove 15, the second sound outlet channels 16, and the independent sound cavity 6. Utilizing multiple spaced-apart second sound outlet channels 16 reduces the back damping of the diaphragm's rear cavity, which is beneficial for improving the mid-to-high frequency SPL, replacing the traditional dual-magnetic circuit speaker. Moreover, the magnetic circuit mechanism 4 using the single magnetic circuit of the annular insert 41 has a lower cost than the traditional dual-magnetic circuit structure.
[0031] Furthermore, the second sound outlet channel 16 is a circular hole, and a fourth tuning paper 17 covering the second sound outlet channel 16 is annularly attached to the bottom of the annular insert 41. In practical applications, the fourth tuning paper 17 covering the second sound outlet channel 16 can be attached to the bottom of the annular insert 41 according to actual needs, so that the sound can be tuned from inside the speaker.
[0032] 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 loudspeaker with an independent acoustic cavity, characterized in that: The device includes a frame, a diaphragm, a voice coil, a magnetic circuit mechanism, and a rear cavity. The diaphragm is placed on top of the frame, the top of the voice coil is attached to the diaphragm, and the bottom of the voice coil extends into the magnetic circuit mechanism. The magnetic circuit mechanism is embedded in the inner ring wall of the frame. The rear cavity is covered and sealed by welding to the periphery of the frame. An independent sound cavity is formed between the inner cavity of the rear cavity and the bottom of the frame. A first sound outlet is provided on the side of the rear cavity, and a second sound outlet is provided at the bottom of the rear cavity.
2. A loudspeaker with an independent acoustic cavity according to claim 1, characterized in that: The basin frame has a welded part protruding from its periphery, and the outer periphery of the rear cavity is ultrasonically welded to the welded part.
3. A loudspeaker with an independent acoustic cavity according to claim 1, characterized in that: There are two first sound outlet holes, which are spaced apart; the first sound outlet holes are arc-shaped strip holes.
4. A loudspeaker with an independent acoustic cavity according to claim 1, characterized in that: The outer surface of the rear cavity is fitted with a first tuning paper covering the first sound outlet, and the bottom surface of the rear cavity is fitted with a second tuning paper covering the second sound outlet.
5. A loudspeaker with an independent acoustic cavity according to claim 1, characterized in that: The top of the basin frame is provided with a first annular sound outlet groove, and the first annular sound outlet groove is provided with a plurality of first sound outlet channels distributed at intervals. The first annular sound outlet groove, the first sound outlet channels and the independent sound cavity are connected in sequence.
6. A loudspeaker with an independent acoustic cavity according to claim 5, characterized in that: The first sound outlet channel is an arc-shaped perforation; a third tuning paper covering the first sound outlet channel is attached to the bottom of the frame.
7. A loudspeaker with an independent acoustic cavity according to claim 1, characterized in that: The magnetic circuit mechanism includes an annular insert embedded in the inner ring wall of the frame, 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.
8. A loudspeaker with an independent acoustic cavity according to claim 7, characterized in that: The top of the annular insert is provided with a second annular sound outlet groove, and the second annular sound outlet groove is provided with a plurality of spaced second sound outlet channels. The second annular sound outlet groove, the second sound outlet channels and the independent sound cavity are connected in sequence.
9. A loudspeaker with an independent acoustic cavity according to claim 8, characterized in that: The second sound outlet channel is a circular hole, and the bottom of the annular insert is annularly fitted with a fourth tuning paper covering the second sound outlet channel.