Electrodynamic loudspeaker

Abstract

The utility model relates to an electrodynamic loudspeaker, which comprises a cone frame, a cone arranged on the inner side of the cone frame, a magnetic circuit assembly arranged at the bottom of the cone frame, a guide cylinder connected with the bottom of the cone, a voice coil wound outside the guide cylinder, and a dust cover arranged on the cone and positioned above the guide cylinder, the periphery of the guide cylinder is coaxially sleeved with an annular elastic centering disk, and the centering disk is fixedly connected with the inner wall of the basin stand through the outer edge of the centering disk to form a radial suspension structure. Two conductive leads are led out of the voice coil, the two conductive leads are bonded and fixed on the upper surface of the centering support chip through glue, and the conductive leads extend to the outside of the basin frame through the outer edge of the centering support chip and form electrical connection terminals. According to the utility model, the conductive lead is firmly bonded on the centering disk through the adhesive, thereby avoiding the problem of lead loosening or fracture caused by vibration, and improving the electrical connection reliability of the whole loudspeaker system.

Description

Technical Field

[0001] This utility model relates to the field of loudspeakers, and in particular to an electrodynamic loudspeaker. Background Technology

[0002] As a core component of electroacoustic transducers, the linearity and reliability of the vibration system of an electrodynamic loudspeaker directly affect its acoustic performance. In traditional structures, a centering bracket is typically used for positioning between the speaker tube and the frame. During vibration, the centering bracket vibrates along with the cone. Furthermore, the voice coil, which is fitted around the outer periphery of the speaker tube, requires a lead wire for power transmission. In traditional structures, this lead wire is led directly from above the centering bracket, often using suspended wiring or simple binding. Under continuous vibration, this can easily lead to fatigue fracture of the lead wire, causing poor contact or even open circuit failure. Moreover, the suspended wiring method can easily cause the lead wire to collide with the centering bracket, resulting in noise from the loudspeaker. Utility Model Content

[0003] In view of this, in order to solve the above-mentioned technical problems, this utility model provides an electric loudspeaker that can effectively improve lead wire life and improve the sound output.

[0004] The objective of this utility model is achieved through the following technical solution:

[0005] An electrodynamic loudspeaker includes a frame, a cone disposed inside the frame, a magnetic circuit assembly disposed at the bottom of the frame, a guide cylinder connected to the bottom of the cone, a voice coil wound around the outside of the guide cylinder, and a dust cover disposed on the cone and above the guide cylinder. An annular elastic centering support is coaxially sleeved around the outer periphery of the guide cylinder. The centering support is fixedly connected to the inner wall of the frame through its outer edge to form a radial suspension structure. Two conductive leads are led out from the voice coil. The two conductive leads are fixed to the upper surface of the centering support by adhesive. The conductive leads extend from the outer edge of the centering support to the outside of the frame and form electrical connection terminals.

[0006] In the aforementioned technical solution, the guide cylinder is radially suspended and connected to the inner wall of the frame via a ring-shaped elastic centering support. This ensures stable movement of the voice coil in the magnetic field, effectively reducing structural loosening or deformation caused by vibration, thereby improving the long-term stability and durability of the loudspeaker. Furthermore, the conductive leads are firmly bonded to the centering support with adhesive and then led out from the outer edge of the centering support to the outside of the frame. This connection method ensures stable transmission of electrical signals and avoids loosening or breakage of the leads due to vibration, improving the electrical connection reliability of the entire loudspeaker system. Simultaneously, because the conductive leads are relatively fixed to the centering support, the centering support will not collide with the conductive leads regardless of the amplitude of vibration, thus avoiding noise caused by impact and improving the loudspeaker's performance. In addition, it effectively improves the internal space of the loudspeaker, making its structure more compact.

[0007] Furthermore, the centering support has a corrugated surface, and the two conductive leads are symmetrically distributed at 180° along the upper surface of the centering support.

[0008] In the above technical solution, the conductive leads are arranged symmetrically at 180° and bonded to the corrugated surface, which allows for the dynamic release of bending stress in the leads by utilizing the synchronous deformation characteristics of the centering support. Furthermore, it helps to balance the force on the voice coil in the magnetic field and avoid localized overheating.

[0009] Furthermore, the centering support is made of a highly elastic polymer material to form a concentric corrugated structure, and the conductive lead extends along the corrugation of the centering support and maintains a shape fit with the crest and trough surface of the centering support.

[0010] In the above technical solution, the centering support made of highly elastic polymer material has excellent elasticity and recovery ability, which can quickly respond to small changes in audio signals and reduce vibration delay; the concentric corrugated structure not only increases the surface area of ​​the centering support, but also absorbs and disperses vibration energy more effectively through the optimization of its geometry, reducing sound wave reflection and the formation of standing waves.

[0011] Furthermore, the surface of the conductive lead is covered with a polyimide insulating layer, and the conductive lead is fixedly connected to the surface of the centering support plate through a UV-cured adhesive in a surface contact manner.

[0012] In the above technical solution, polyimide is a high-performance insulating material with excellent high-temperature resistance, chemical corrosion resistance, and electrical insulation properties. The UV-curing adhesive features rapid curing, high strength, and good adhesion, effectively improving the connection stability between the conductive leads and the centering support.

[0013] Furthermore, the corrugation depth of the concentric corrugated structure is 0.5-2 mm, and the spacing between adjacent corrugated peaks is 3-8 mm.

[0014] In the above technical solution, the reasonable setting of the corrugation depth and the spacing between adjacent crests enables the centering support to effectively absorb and disperse vibration energy while providing sufficient support force. In addition, the appropriate corrugation depth and crest spacing increase the surface area of ​​the centering support, providing more support points and enhancing the overall stability of the structure.

[0015] Furthermore, the centering support includes an inner fixing ring, an outer fixing ring, and a corrugated elastic connecting part connecting the two. The inner fixing ring is sleeved on the outer periphery of the guide cylinder, and the outer fixing ring is fixed to the inner side of the basin frame.

[0016] In the above technical solution, the inner and outer fixing rings are tightly connected to the guide cylinder and the frame, respectively, forming a stable support structure, which enhances the connection strength between the centering support and other components of the speaker, and also improves the structural stability of the entire speaker system.

[0017] Furthermore, the dust cover includes a dome-shaped cover and an annular sealing ring, and the dome-shaped cover forms an airtight connection with the paper basin through the annular sealing ring.

[0018] In the aforementioned technical solution, the dome-shaped enclosure effectively covers the bottom opening of the paper cone, preventing dust and other impurities from entering the speaker's interior, protecting the voice coil and magnetic circuit components from contamination, thereby extending the speaker's lifespan and maintaining the purity of the sound output. Meanwhile, the annular sealing ring ensures an airtight connection between the dust cover and the paper cone, reducing sound wave leakage at the connection point.

[0019] Furthermore, the guide cylinder is made of carbon fiber reinforced composite material with a wall thickness of 0.3-0.8 mm, the voice coil has 4-8 winding layers, and the winding gaps are filled with high-temperature resistant epoxy resin.

[0020] In the above technical solution, carbon fiber reinforced composite material has the characteristics of high strength and low density, which enables the guide cylinder to achieve a lightweight design while ensuring sufficient structural strength. The filling of high-temperature resistant epoxy resin not only enhances the structural stability of the voice coil, but also reduces the gaps between the windings and vibration interference, making the voice coil vibrate more uniformly and consistently.

[0021] Furthermore, the magnetic circuit assembly includes a T-shaped block, a permanent magnet sleeved on the T-shaped block, and a clamping plate disposed between the permanent magnet and the basin frame, with the guide cylinder movably sleeved on the outer periphery of the protrusion of the T-shaped block.

[0022] In the above technical solution, the design of the T-shaped block makes the magnetic field distribution of the magnetic circuit assembly more uniform and concentrated. The clamp is located between the permanent magnet and the frame, which not only fixes the permanent magnet, but also enhances the connection strength between the magnetic circuit assembly and the frame. Attached Figure Description

[0023] Figure 1 This is a schematic diagram of the overall structure of one embodiment.

[0024] Figure 2 for Figure 1 Enlarged view of part A in the middle.

[0025] Reference numerals: 1-Sink frame; 2-Paper cone; 3-Magnetic circuit assembly; 31-T-block; 32-Permanent magnet; 33-Clamping plate; 4-Guide cylinder; 5-Voice coil; 6-Dust cover; 61-Dome-shaped cover; 62-Annular sealing ring; 7-Centering support plate; 71-Inner fixing ring; 72-Outer fixing ring; 73-Corrugated elastic connection part; 8-Conductive lead wire; 9-Adhesive. Detailed Implementation

[0026] To facilitate understanding of this invention, a more comprehensive description will be provided below with reference to the accompanying drawings. The drawings illustrate preferred embodiments of the invention. However, this invention can be implemented in many different forms and is not limited to the embodiments described herein.

[0027] Please refer to Figure 1 and Figure 2 A preferred embodiment of this utility model is as follows.

[0028] An electrodynamic loudspeaker includes a frame 1, a paper cone 2 disposed inside the frame 1, a magnetic circuit assembly 3 disposed at the bottom of the frame 1, a guide tube 4 connected to the bottom of the paper cone 2, a voice coil 5 wound around the outside of the guide tube 4, and a dust cover 6 disposed on the paper cone 2 and above the guide tube 4. An annular elastic centering support 7 is coaxially sleeved around the outer periphery of the guide tube 4. The centering support 7 is fixedly connected to the inner wall of the frame 1 through its outer edge to form a radial suspension structure. Two conductive leads 8 extend from the voice coil 5 and are bonded to the upper surface of the centering support 7 with adhesive 9. The conductive leads 8 extend from the outer edge of the centering support 7 to the outside of the frame 1 and form electrical connection terminals (not shown in the figure). The two conductive leads 8 extend along the outer wall of the guide tube 4 after exiting the voice coil 5 and exit from the gap between the centering support 7 and the guide tube 4 to adhere to the upper surface of the centering support 7.

[0029] In this embodiment, the guide cylinder 4 is radially suspended and connected to the inner wall of the frame 1 via an annular elastic centering support 7. This ensures the stable movement of the voice coil 5 in the magnetic field, effectively reducing structural loosening or deformation caused by vibration, thereby improving the long-term stability and durability of the speaker. Furthermore, the conductive lead 8 is firmly bonded to the centering support 7 with adhesive 9, and then led out to the outside of the frame 1 via the outer edge of the centering support 7. This connection method ensures stable transmission of electrical signals and avoids loosening or breakage of the lead due to vibration, improving the electrical connection reliability of the entire speaker system. Simultaneously, since the conductive lead 8 is relatively fixed to the centering support 7, the centering support 7 will not collide with the conductive lead 8 regardless of the amplitude of its vibration, thus avoiding noise caused by impact and improving the speaker's performance. In addition, this also effectively improves the internal space of the speaker, making the speaker structure more compact.

[0030] In this embodiment, the centering support 7 has a corrugated surface, and two conductive leads 8 are symmetrically distributed at 180° along the upper surface of the centering support 7. The conductive leads 8 are arranged symmetrically at 180° and bonded to the corrugated surface, allowing for the dynamic release of bending stress in the leads by utilizing the synchronous deformation characteristics of the centering support 7. Furthermore, this also helps to balance the force on the voice coil 5 in the magnetic field and avoid localized overheating.

[0031] In this embodiment, the centering support 7 is made of a highly elastic polymer material to form a concentric corrugated structure. The corrugation depth of the concentric corrugated structure is 0.5-2mm, and the spacing between adjacent corrugations is 3-8mm. The conductive lead 8 extends along the corrugation direction of the centering support 7 and maintains a shape fit with the corrugation surface of the centering support 7.

[0032] Specifically, the centering support 7, made of highly elastic polymer material, possesses excellent elasticity and resilience, enabling it to quickly respond to minute changes in audio signals and reduce vibration delay. The concentric corrugated structure not only increases the surface area of ​​the centering support 7 but also, through optimized geometry, more effectively absorbs and disperses vibration energy, reducing sound wave reflection and standing wave formation. The conductive leads 8 are arranged along the corrugation of the centering support 7, and their shape is adapted to the crests and troughs of the corrugations, reducing relative movement of the leads during vibration, lowering electrical noise caused by friction or vibration, and maintaining the pure sound quality of the speaker output.

[0033] Furthermore, the reasonable setting of the corrugation depth and the spacing between adjacent crests enables the centering support 7 to effectively absorb and disperse vibration energy while providing sufficient support force. In addition, the appropriate corrugation depth and crest spacing increase the surface area of ​​the centering support 7, providing more support points and enhancing the overall stability of the structure.

[0034] In this embodiment, the conductive lead 8 is coated with a polyimide insulating layer, and the conductive lead 8 is fixedly connected to the surface of the centering support 7 through a UV-cured adhesive in a surface contact manner. The conductive lead 8 has a flat structural design for easier attachment to the surface of the centering support 7.

[0035] Polyimide is a high-performance insulating material with excellent high-temperature resistance, chemical corrosion resistance, and electrical insulation properties. UV-curable adhesives feature rapid curing, high strength, and good adhesion, effectively improving the connection stability between the conductive lead 8 and the centering support 7.

[0036] In this embodiment, the centering support 7 includes an inner fixing ring 71, an outer fixing ring 72, and a corrugated elastic connecting part 73 connecting the two. The inner fixing ring 71 is sleeved on the outer periphery of the guide cylinder 4, and the outer fixing ring 72 is fixed to the inner side of the basin frame 1. The inner fixing ring 71 can be sleeved on the outer periphery of the guide cylinder 4 by interference fit, and the outer fixing ring 72 can be fixed to the inner flange of the basin frame 1 by laser welding or adhesive bonding.

[0037] The inner fixing ring 71 and the outer fixing ring 72 are tightly connected to the guide cylinder 4 and the frame 1, respectively, forming a stable support structure. This enhances the connection strength between the centering support 7 and other components of the speaker, and also improves the structural stability of the entire speaker system. The corrugated elastic connection part 73 not only provides the necessary elastic support, but also optimizes the heat dissipation path through its increased surface area and complex geometry.

[0038] The dust cover 6 in this embodiment includes a dome-shaped cover 61 and an annular sealing ring 62. The dome-shaped cover 61 forms an airtight connection with the cone 2 through the annular sealing ring 62. The dome-shaped cover 61 effectively covers the bottom opening of the cone 2, preventing dust and other impurities from entering the speaker, protecting the voice coil 5 and magnetic circuit assembly 3 from contamination, thereby extending the speaker's service life and maintaining the purity of the sound output. The annular sealing ring 62 ensures an airtight connection between the dust cover 6 and the cone 2, reducing sound wave leakage at the connection point.

[0039] It should be noted that the guide cylinder 4 in this embodiment is made of carbon fiber reinforced composite material with a wall thickness of 0.3-0.8mm, the voice coil 5 has 4-8 winding layers, and the winding gaps are filled with high-temperature resistant epoxy resin.

[0040] In the above technical solution, the high strength and low density of carbon fiber reinforced composite material enable the guide cylinder 4 to achieve a lightweight design while ensuring sufficient structural strength. This helps reduce the overall weight of the speaker, lower energy consumption, and improve response speed, resulting in faster and more accurate sound output. The thin-walled design of the guide cylinder 4 reduces heat conduction obstacles, and combined with the high thermal conductivity of the carbon fiber composite material, effectively improves the speaker's heat dissipation performance. Furthermore, the filling with high-temperature resistant epoxy resin not only enhances the structural stability of the voice coil 5 but also reduces gaps and vibration interference between the windings, making the voice coil 5 vibrate more uniformly and consistently.

[0041] In this embodiment, the magnetic circuit assembly 3 includes a T-shaped block 31, a permanent magnet 32 ​​sleeved on the T-shaped block 31, and a clamping plate 33 disposed between the permanent magnet 32 ​​and the frame 1. The guide cylinder 4 is movably sleeved on the outer periphery of the protrusion of the T-shaped block 31. Specifically, the T-shaped block 31 is inverted, with a columnar protrusion in the middle, and the permanent magnet 32 ​​is annular to be sleeved on the outer periphery of the protrusion.

[0042] The design of the T-shaped block 31 makes the magnetic field distribution of the magnetic circuit assembly 3 more uniform and concentrated. The clamp 33 is located between the permanent magnet 32 ​​and the basin frame 1, which not only fixes the permanent magnet 32, but also enhances the connection strength between the magnetic circuit assembly 3 and the basin frame 1.

[0043] In the description of this utility model, it should be understood that terms such as "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", and "outer" indicate the orientation or positional relationship based on the orientation or positional relationship shown in the accompanying drawings. They are only for the convenience of describing this utility model and simplifying the description, and do not indicate or imply that the device or element referred to must have a specific orientation, or be constructed and operated in a specific orientation. Therefore, they should not be construed as limitations on this utility model.

[0044] Furthermore, the terms "first" and "second" are used for descriptive purposes only and should not be construed as indicating or implying relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined as "first" or "second" may explicitly or implicitly include one or more of that feature. In the description of this utility model, "a plurality of" means two or more, unless otherwise explicitly specified.

[0045] Although the description of this utility model has been given in conjunction with the specific embodiments described above, it will be apparent to those skilled in the art that many substitutions, modifications, and variations can be made based on the above description. Therefore, all such substitutions, modifications, and variations are included within the spirit and scope of the appended claims.

Claims

1. An electric loudspeaker comprising a frame, a paper cone arranged inside the frame, a magnetic circuit assembly arranged at the bottom of the frame, a guide tube connected to the bottom of the paper cone, a voice coil wound outside the guide tube, and a dust cover arranged on the paper cone and above the guide tube, characterized in that: The guiding cylinder is coaxially sleeved with an annular elastic centering sheet, the centering sheet is fixedly connected with the inner wall of the yoke through its outer edge to form a radial suspension structure; the voice coil is led out with two conductive leads, the two conductive leads are fixed on the upper surface of the centering sheet by adhesive, and the conductive leads extend to the outside of the yoke through the outer edge of the centering sheet and form an electrical connection terminal. ​ 2. An electrodynamic loudspeaker according to claim 1, wherein The centering sheet has a corrugated surface, and the two conductive leads are symmetrically distributed along the upper surface of the centering sheet by 180°.

3. The electrodynamic loudspeaker of claim 1, wherein The centering sheet is made of a high-elastic polymer material into a concentric corrugated structure, the conductive leads extend along the corrugated direction of the centering sheet and are shape-fitted with the corrugated surface of the centering sheet.

4. An electrodynamic loudspeaker according to claim 3, wherein The surface of the conductive lead is coated with a polyimide insulating layer, and the conductive lead is fixedly connected with the surface of the centering sheet by UV curing adhesive in a surface contact mode.

5. The electrodynamic loudspeaker of claim 3, wherein The corrugated depth of the concentric corrugated structure is 0.5-2mm, and the distance between adjacent corrugated peaks is 3-8mm.

6. The electrodynamic loudspeaker of claim 1, wherein The centering sheet includes an inner fixed ring, an outer fixed ring and a corrugated elastic connecting part connecting the two, the inner fixed ring is sleeved on the outer periphery of the guiding cylinder, and the outer fixed ring is fixed to the inner side of the yoke.

7. The electrodynamic loudspeaker of claim 1, wherein The dust cover includes a dome-shaped cover body and an annular sealing ring, the dome-shaped cover body is in airtight connection with the paper basin through the annular sealing ring.

8. The electrodynamic loudspeaker of claim 1, wherein The guiding cylinder holder is made of carbon fiber reinforced composite material, the wall thickness is 0.3-0.8mm, the wire winding layers of the voice coil are 4-8 layers, and the wire winding gap is filled with high-temperature resistant epoxy resin.

9. An electrodynamic loudspeaker according to any one of claims 1-8, characterized in that The magnetic circuit assembly includes a T-shaped block, a permanent magnet sleeved on the T-shaped block, and a clamping plate arranged between the permanent magnet and the yoke, and the guiding cylinder is movably sleeved on the outer periphery of the protruding part of the T-shaped block.

Images