loudspeaker

Abstract

Provided in the present invention is a loudspeaker, comprising: a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate for sound production, wherein the vibration system comprises a diaphragm fixed to the frame, at least two voice coils for driving the diaphragm to vibrate for sound production, and conductive members electrically connected to the voice coils; the voice coils are connected to each other by means of a conductive adhesive, and / or the voice coils are connected to the conductive members by means of the conductive adhesive; the conductive adhesive is attached to the diaphragm; and an insulating coating is provided between the conductive adhesive and the diaphragm. The electrical connection between the voice coils and / or between the voice coils and the conductive members is achieved by means of the provision of the conductive adhesive, which replaces a conventional connection method in which a voice coil lead is connected to an FPC, so that the volume of the magnetic circuit system is not occupied, and space is saved on; in addition, the conductive adhesive is attached to the diaphragm and is thus not easily broken, thereby further enhancing the stability of the electrical connection of the voice coils and improving the performance of the loudspeaker.

Description

speaker Technical Field

[0001] This invention relates to the field of electroacoustic technology, and more particularly to a loudspeaker. Background Technology

[0002] The loudspeaker technology includes a frame, a vibration system fixed to the frame, and a magnetic circuit system with magnetic gaps. The vibration system includes a diaphragm and a voice coil. The voice coil is connected to an external circuit via a flexible printed circuit board (FPC) and drives the diaphragm to vibrate under the influence of a magnetic field to produce sound. To improve loudspeaker performance, using multiple voice coils can preferentially increase the BL value (i.e., magnetic flux density, which is the product of magnetic flux density B and voice coil wire length L) and sensitivity. However, the connection between multiple voice coils is generally that the voice coil leads are connected to the FPC. On the one hand, the voice coil leads are prone to breakage due to excessive length; on the other hand, the FPC occupies more space, affecting the volume of the magnetic circuit and thus impacting the loudspeaker's performance.

[0003] Therefore, it is necessary to propose a new technical solution to address the above problems. Technical issues

[0004] The purpose of this invention is to provide a loudspeaker that ensures the stability of the voice coil electrical connection and does not occupy the space of the magnetic circuit system. Technical solutions

[0005] The technical solution of the present invention is as follows: A loudspeaker includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and produce sound. The vibration system includes a diaphragm fixed to the frame, at least two voice coils for driving the diaphragm to vibrate and produce sound, and a conductive element electrically connected to the voice coils. The voice coils are connected to each other through a conductive adhesive and / or the voice coils are connected to the conductive element through the conductive adhesive. The conductive adhesive is attached to the diaphragm, and an insulating coating is provided between the conductive adhesive and the diaphragm.

[0006] Preferably, the conductive colloid is composed of a polymer matrix and a conductive material mixed in the polymer matrix.

[0007] Preferably, the polymer matrix includes at least one of nitrile rubber, polyester polyurethane, acrylic resin modified polyurethane, polyester resin, epoxy resin elastomer, silicone elastomer, acrylate rubber, EPDM rubber, polysulfide rubber, and ethylene-acrylate rubber.

[0008] Preferably, the conductive material is at least one of a metallic material, a carbon-based material, and polycrystalline silicon.

[0009] Preferably, the metallic material includes at least one selected from silver, gold, copper, aluminum, nickel, vanadium, indium, and palladium.

[0010] Preferably, the carbon-based material includes at least one of carbon black, graphene, and carbon nanotubes.

[0011] Preferably, the conductive material comprises at least one combination of silver and gold, gold and copper, silver and copper, silver and nickel, silver and vanadium, silver and indium, and silver and palladium.

[0012] Preferably, the conductive element includes a first portion fixed to the frame, a second portion extending from the first portion toward the voice coil, and a third portion extending from the second portion toward the diaphragm and fixed to the diaphragm. The first portion is connected to an external circuit, and the third portion is connected to the conductive colloid.

[0013] Preferably, the voice coil includes a nested first voice coil and a second voice coil, and the magnetic circuit system includes a lower clamp fixed to the frame, a main magnet fixed to the lower clamp, a first auxiliary magnet surrounding the main magnet and forming a first magnetic gap with the main magnet, and a second auxiliary magnet surrounding the first auxiliary magnet and forming a second magnetic gap with the first auxiliary magnet. The first voice coil is fixed to the diaphragm and inserted into the first magnetic gap, and the second voice coil is fixed to the diaphragm and inserted into the second magnetic gap.

[0014] Preferably, the voice coils are arranged side by side, and the magnetic circuit system includes a lower clamp fixed to the frame, at least two central magnets fixed to the lower clamp, and a side magnet arranged around the central magnets to form a magnetic gap. The voice coils are fixed to the diaphragm and inserted into the magnetic gap. Beneficial effects

[0015] The loudspeaker provided by this invention includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound. The vibration system includes a diaphragm fixed to the frame, at least two voice coils for driving the diaphragm to vibrate and generate sound, and a conductive element electrically connected to the voice coils. The voice coils are connected to each other through conductive adhesive and / or the voice coils are connected to the conductive element through conductive adhesive. The conductive adhesive is attached to the diaphragm, and an insulating coating is provided between the conductive adhesive and the diaphragm. By setting the conductive adhesive to achieve the electrical connection between the voice coils and / or the voice coils and the conductive element, the traditional method of connecting the voice coil leads to the FPC is replaced. This does not occupy the volume of the magnetic circuit system, saves space, and the conductive adhesive is attached to the diaphragm, making it less prone to breakage, further enhancing the stability of the voice coil electrical connection and improving the performance of the loudspeaker. Attached Figure Description

[0016] Figure 1 is a perspective view of the first type of loudspeaker provided by the present invention after the magnetic circuit system has been removed;

[0017] Figure 2 is a perspective view of the second type of loudspeaker provided by the present invention after the magnetic circuit system has been removed;

[0018] Figure 3 is an exploded perspective view of the first type of loudspeaker provided by the present invention;

[0019] Figure 4 is an exploded perspective view of the second type of loudspeaker provided by the present invention;

[0020] In the diagram: loudspeaker 100 / 200, frame 10, vibration system 20, diaphragm 21, dome 211, surround 212, voice coil 22, first voice coil 221, second voice coil 222, conductive element 23, first part 231, second part 232, third part 233, conductive colloid 24, magnetic circuit system 30, lower clamp 31, main magnet 32, first auxiliary magnet 33, first magnetic gap 34, second auxiliary magnet 35, second magnetic gap 36, center magnet 37, side magnet 38. Embodiments of the present invention

[0021] The technical solutions of the present invention will be clearly and completely described below with reference to the accompanying drawings in the embodiments of the present invention.

[0022] Referring to Figures 1 to 4, this invention provides a loudspeaker 100, including a frame 10, a vibration system 20 fixed to the frame 10, and a magnetic circuit system 30 for driving the vibration system 20 to vibrate and generate sound. The vibration system 20 includes a diaphragm 21 fixed to the frame 10, at least two voice coils 22 driving the diaphragm 21 to vibrate and generate sound, and a conductive element 23 electrically connected to the voice coils 22. The voice coils 22 are fixed to the diaphragm 21 and are connected to the conductive element 23 to connect the voice coils 22 to an external circuit. By using multiple voice coils 22 to drive the diaphragm 21, the black-white (BL) value and vibration sensitivity can be increased, effectively improving product performance.

[0023] Please refer to Figures 1 to 4. The diaphragm 21 includes a folded portion 212 fixed to the frame 10 and a ball top 211 connected to the folded portion 212. The voice coil 22 and the conductive element 23 are both fixed to the ball top 211.

[0024] Furthermore, the voice coils 22 are connected to each other via conductive adhesive 24 and / or the voice coils 22 are connected to the conductive element 23 via conductive adhesive 24. The conductive adhesive 24 is attached to the diaphragm 21, and an insulating coating is provided between the conductive adhesive 24 and the diaphragm 21. By using conductive adhesive 24 to connect the voice coils 22 and / or using conductive adhesive 24 to connect the voice coils 22 and the conductive element 23, and by attaching the conductive adhesive 24 to the diaphragm 21, the volume of the magnetic circuit system 30 is not occupied, and the stability of the electrical connection of the voice coils 22 is enhanced, thereby further improving the acoustic performance of the loudspeaker 100.

[0025] The multiple voice coils 22 can be arranged side by side or nested.

[0026] Please refer to Figures 1 and 3. The first loudspeaker 100 provided by the present invention includes a voice coil 22 comprising a first voice coil 221 and a second voice coil 222 nested together. The magnetic circuit system 30 includes a lower clamping plate 31 fixed to the frame 10, a main magnet 32 ​​fixed to the lower clamping plate 31, a first auxiliary magnet 33 surrounding the main magnet 32 ​​and forming a first magnetic gap 34 with the main magnet 32, and a second auxiliary magnet 35 surrounding the first auxiliary magnet 33 and forming a second magnetic gap 36 with the first auxiliary magnet 33. The first voice coil 221 is fixed to the diaphragm 21 and inserted into the first magnetic gap 34, and the second voice coil 222 is fixed to the diaphragm 21 and inserted into the second magnetic gap 36. The first voice coil 221 is closer to the conductive element 23 than the second voice coil 222. Therefore, in this embodiment, conductive colloid 24 can be used to connect the second voice coil 222 and the conductive element 23, replacing the traditional voice coil 22 lead connection. This avoids the risk of breakage due to excessively long leads and improves the stability of the voice coil 22 electrical connection. Alternatively, conductive colloid 24 can be used to connect the first voice coil 221 and the second voice coil 222, and then the first voice coil 221 can be connected to the conductive element 23, achieving a series electrical connection between the first voice coil 221 and the second voice coil 222, replacing the traditional FPC connection and saving the volume of the magnetic circuit system 30. The conductive colloid 24 is attached to the top sphere 211 of the diaphragm 21, and an insulating coating is provided between the conductive colloid 24 and the top sphere 211 to achieve external insulation, thereby preventing short circuits in the voice coil 22 and ensuring the stability of the electrical connection.

[0027] It should be noted that, depending on the actual needs, the voice coil 22 can be arranged in three or more nested configurations to further enhance the driving force of the voice coil 22 on the diaphragm 21. Of course, other situations where the voice coil 22 is connected to each other and / or electrically connected to the conductive element 23 via conductive colloid 24 are within the scope of protection of this invention.

[0028] Please refer to Figures 2 and 4 for the second type of loudspeaker 200 provided by the present invention. Multiple voice coils 22 are arranged side-by-side. The magnetic circuit system 30 includes a lower clamping plate 31 fixed to the frame 10, at least two central magnets 37 fixed to the lower clamping plate 31, and side magnets 38 arranged around the central magnets 37 to form a third magnetic gap. The voice coils 22 are fixed to the diaphragm 21 and inserted into the third magnetic gap. In this embodiment, conductive colloid 24 can be used to connect the multiple voice coils 22, and simultaneously use conductive colloid 24 to connect the voice coils 22 and the conductive element 23, to achieve a series connection between the multiple voice coils 22; or only conductive colloid 24 can be used to connect the multiple voice coils 22 and the conductive element 23 respectively, to achieve a parallel electrical connection between the voice coils 22, thereby allowing individual adjustment of the driving force of each voice coil 22 as needed; or only conductive colloid 24 can be used to connect the multiple voice coils 22, achieving an electrical connection between the voice coils 22, and then the voice coils 22 are connected to the conductive elements 23 respectively. Of course, other situations in which the voice coils 22 are electrically connected by connecting them with the conductive colloid 24 and / or by connecting the voice coils 22 and the conductive element 23 with the conductive colloid 24 to achieve electrical connection between the voice coils 22 and / or between the voice coils 22 and the conductive element 23 are all within the scope of protection of this invention.

[0029] Please refer to Figures 1 to 4. The conductive element 23 includes a first portion 231 fixed to the frame 10, a second portion 232 extending from the first portion 231 towards the voice coil 22, and a third portion 233 extending from the second portion 232 towards the diaphragm 21 and fixed to the diaphragm 21. The first portion 231 is connected to an external circuit, and the third portion 233 is connected to a conductive adhesive 24. One end of the conductive element 23 is connected to an external circuit, and the other end is connected to the conductive adhesive 24 attached to the diaphragm 21, thereby achieving electrical connection of the voice coil 22. By fixing both the third portion 233 of the conductive element 23 and the voice coil 22 to the diaphragm 21 and spacing them apart, and connecting them through the conductive adhesive 24 attached to the diaphragm 21, the stability of the electrical connection of the voice coil 22 can still be achieved during the vibration and sound generation process of the loudspeaker 100.

[0030] Furthermore, the conductive colloid 24 is composed of a polymer matrix and a conductive material mixed in the polymer matrix. The conductive material has conductive properties, which enables the conductive colloid 24 to conduct electricity, thus ensuring the low resistance performance of the conductive colloid 24.

[0031] The polymer matrix includes at least one of nitrile rubber, polyester polyurethane, acrylic resin-modified polyurethane, polyester resin, epoxy resin elastomer, silicone elastomer, acrylate rubber, EPDM rubber, polysulfide rubber, and ethylene-acrylate rubber. The conductive material is at least one of a metallic material, a carbon-based material, and polycrystalline silicon. This combination of materials gives the conductive colloid 24 good flexibility and elasticity. On the one hand, it prevents the conductive colloid 24 from breaking easily, thus ensuring the stability of the electrical connection of the voice coil 22. On the other hand, it allows the conductive colloid 24 to better fit with the top of the sphere 211, ensuring consistent vibration.

[0032] Furthermore, the metallic material includes at least one of silver, gold, copper, aluminum, nickel, vanadium, indium, and palladium. The carbon-based material includes at least one of carbon black, graphene, and carbon nanotubes. Preferably, the conductive material includes at least one combination of silver and gold, gold and copper, silver and copper, silver and nickel, silver and vanadium, silver and indium, and silver and palladium. This improves the conductivity of the conductive colloid 24 and ensures the driving capability of the voice coil 22.

[0033] Compared with related technologies, the loudspeaker provided by the present invention includes a frame, a vibration system fixed to the frame, and a magnetic circuit system for driving the vibration system to vibrate and generate sound. The vibration system includes a diaphragm fixed to the frame, at least two voice coils for driving the diaphragm to vibrate and generate sound, and a conductive element electrically connected to the voice coils. The voice coils are connected to each other through conductive adhesive and / or the voice coils are connected to the conductive element through conductive adhesive. The conductive adhesive is attached to the diaphragm, and an insulating coating is provided between the conductive adhesive and the diaphragm. By setting the conductive adhesive to achieve the electrical connection between the voice coils and / or the voice coils and the conductive element, the traditional method of connecting the voice coil leads to the FPC is replaced. This does not occupy the volume of the magnetic circuit system, saves space, and the conductive adhesive is attached to the diaphragm, making it less prone to breakage, further enhancing the stability of the voice coil electrical connection and improving the performance of the loudspeaker.

[0034] The above are merely embodiments of the present invention. It should be noted that those skilled in the art can make improvements without departing from the inventive concept of the present invention, but these improvements all fall within the protection scope of the present invention.

Claims

1. A loudspeaker comprising a basket and a vibrating system fixed to the basket and a magnetic circuit system driving the vibrating system to vibrate to sound, characterized in that, The vibrating system comprises a diaphragm fixed to the yoke, at least two voice coils driving the diaphragm to vibrate and sound, and a conductive member electrically connected with the voice coils, the voice coils are connected by a conductive glue and / or the voice coils are connected with the conductive member by the conductive glue, the conductive glue is attached to the diaphragm, and an insulating coating is arranged between the conductive glue and the diaphragm.

2. The loudspeaker of claim 1, wherein, The conductive glue is composed of a polymer matrix and a conductive material mixed in the polymer matrix.

3. The loudspeaker of claim 2, wherein, The polymer matrix comprises at least one of nitrile rubber, polyester-based polyurethane, acrylic resin modified polyurethane, polyester-based resin, epoxy resin elastomer, silicone elastomer, acrylate rubber, ethylene-propylene-diene rubber, polysulfide rubber, and ethylene-acrylate rubber.

4. The loudspeaker of claim 2, wherein, The conductive material is at least one of metal material, carbon-based material, and polycrystalline silicon.

5. The loudspeaker of claim 4, wherein, The metal material comprises at least one of silver, gold, copper, aluminum, nickel, vanadium, indium, and palladium.

6. The loudspeaker of claim 4, wherein, The carbon-based material comprises at least one of carbon black, graphene, and carbon nanotube.

7. The loudspeaker of claim 5, wherein, The conductive material comprises at least one combination of silver and gold, gold and copper, silver and copper, silver and nickel, silver and vanadium, silver and indium, and silver and palladium.

8. The loudspeaker of claim 1, wherein, The conductive member comprises a first part fixed to the yoke, a second part extending from the first part towards the voice coils, and a third part extending from the second part towards the diaphragm and fixed to the diaphragm, the first part is connected with an external circuit, and the third part is connected with the conductive glue.

9. The loudspeaker of claim 1, wherein, The voice coils comprise a first voice coil and a second voice coil arranged in a nested manner, the magnetic circuit system comprises a lower clamp fixed to the yoke, a main magnetic steel fixed to the lower clamp, a first auxiliary magnetic steel arranged around the main magnetic steel and forming a first magnetic gap with the main magnetic steel, and a second auxiliary magnetic steel arranged around the first auxiliary magnetic steel and forming a second magnetic gap with the first auxiliary magnetic steel, the first voice coil is fixed to the diaphragm and inserted into the first magnetic gap, and the second voice coil is fixed to the diaphragm and inserted into the second magnetic gap.

10. The loudspeaker of claim 1, wherein, The voice coils are arranged side by side, the magnetic circuit system comprises a lower clamp fixed to the yoke, at least two center magnetic steels fixed to the lower clamp, and a side magnetic steel arranged around the center magnetic steels to form a magnetic gap, and the voice coils are fixed to the diaphragm and inserted into the magnetic gap.

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