Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are arranged on the basin stand; the vibration system comprises a diaphragm assembly, a voice coil main body and a voice coil lead, and the diaphragm assembly is connected to the frame; the voice coil main body is connected to the inner side surface of the vibrating diaphragm assembly; the voice coil lead is connected with the voice coil main body, and the contact surfaces of the voice coil lead and the voice coil main body are respectively provided with a connecting bump and a connecting pit matched with the connecting bump. The voice coil lead of the sound production unit can be made of a material with better ductility relative to the voice coil main body, so that the risk of breakage of the voice coil lead in a long-term vibration process is reduced, and the service life of the sound production unit is prolonged. The connection boss and the connection pit can increase the contact area of the voice coil lead and the voice coil main body, improve the bonding strength, and prevent the connection part of the voice coil lead and the voice coil main body which are made of different materials from being broken in the use process.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a sound generating unit. Background Art

[0002] The sound unit is a key acoustic component in portable electronic devices, used to convert acoustic waves and electrical signals into sound signals for transmission. It is an energy conversion device. The sound unit typically comprises a vibration system and a magnetic circuit system. The vibration system consists of a diaphragm and voice coil, which are wound with enameled wire. The voice coil wire has its starting and ending ends connected to the circuit as leads.

[0003] In order to improve the performance of the sound unit, the existing sound unit voice coil enameled wire conductor material will use a lighter material, such as aluminum, copper-clad aluminum, etc. However, the aluminum or copper-clad aluminum and other light materials have poor ductility. With the existing sound unit, the amplitude is getting larger and larger, and the pulling force and stress on the lead wire increase accordingly. During long-term use or reliability testing, it is very easy to break the wire. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a sound generating unit with a new structure, the voice coil lead of which has good ductility and is not prone to wire breakage.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is as follows: the sound unit includes a basin frame and a vibration system and a magnetic circuit system arranged on the basin frame; the vibration system includes:

[0006] A diaphragm assembly, wherein the diaphragm assembly is connected to the basin frame;

[0007] a voice coil body connected to the inner side of the diaphragm assembly;

[0008] The voice coil lead is connected to the voice coil body, and the contact surfaces of the voice coil lead and the voice coil body are respectively provided with a connecting protrusion and a connecting pit matched with the connecting protrusion.

[0009] Furthermore, the voice coil lead is made of copper, copper alloy, silver or silver alloy.

[0010] Furthermore, the voice coil lead is an enameled wire.

[0011] Furthermore, the outer surface of the voice coil lead is covered with an elastic layer.

[0012] Furthermore, the voice coil body is made of aluminum, aluminum alloy or copper-clad aluminum.

[0013] Furthermore, the diaphragm assembly includes an inner fixing portion, a folding ring portion and an outer fixing portion sequentially connected from the inside to the outside, and the folding ring portion includes a plurality of folding ring areas sequentially connected from the inside to the outside.

[0014] Furthermore, the diaphragm assembly also includes a middle sticker, which is connected to the inner fixing portion.

[0015] Furthermore, the magnetic circuit system includes a yoke and a magnetic steel. The yoke is arranged on a side of the basin frame away from the vibration system, and the magnetic steel is connected to the inner side surface of the yoke.

[0016] Furthermore, the magnetic steel includes a central magnetic steel and a plurality of side magnetic steels, and the plurality of side magnetic steels are arranged around the central magnetic steel.

[0017] Furthermore, the magnetic circuit system also includes a washer connected to a side of the magnetic steel away from the yoke.

[0018] The beneficial effect of this utility model is that the voice coil lead wire of the sound unit can be made of a material with greater ductility than the voice coil body, thereby reducing the risk of the voice coil lead wire breaking during long-term vibration and facilitating the improvement of the service life of the sound unit. The connecting boss and connecting recess increase the contact area between the voice coil lead wire and the voice coil body, improving the bonding strength and preventing the connection between the voice coil lead wire and the voice coil body from breaking during use. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] Figure 1 This is a schematic diagram of the overall structure of the sound-emitting unit of the first embodiment of the present utility model;

[0020] Figure 2 This is an exploded view of the sound unit of the first embodiment of the present invention;

[0021] Figure 3 This is a schematic axial cross-sectional view of a portion of the voice coil lead and voice coil body in the sound unit of the first embodiment of the present invention.

[0022] Description of labels:

[0023] 1. Basin rack;

[0024] 21. Diaphragm assembly; 211. Inner fixing portion; 212. Folding ring portion; 213. Outer fixing portion; 214. Middle patch;

[0025] 22. Voice coil body; 221. Connecting pit;

[0026] 23. Voice coil lead; 231. Connecting bump; 232. Elastic layer;

[0027] 3. Magnetic circuit system; 31. Yoke; 32. Magnet; 32a. Center magnet; 32b. Side magnet; 33. Washer. DETAILED DESCRIPTION

[0028] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0029] Please refer to Figures 1 to 3 The sound-generating unit comprises a basin frame 1 and a vibration system and a magnetic circuit system 3 provided on the basin frame 1; the vibration system comprises:

[0030] A diaphragm assembly 21, wherein the diaphragm assembly 21 is connected to the basin frame 1;

[0031] a voice coil body 22 connected to the inner side of the diaphragm assembly 21;

[0032] The voice coil lead 23 is connected to the voice coil body 22 . A connecting protrusion 231 and a connecting recess 221 that cooperates with the connecting protrusion 231 are respectively provided on the contact surface between the voice coil lead 23 and the voice coil body 22 .

[0033] As can be seen from the above description, the beneficial effect of the present invention is that the voice coil lead wire 23 of the sound unit can be made of a material with greater ductility than the voice coil body 22, thereby reducing the risk of the voice coil lead wire 23 breaking during long-term vibration and facilitating the improvement of the service life of the sound unit. The connecting boss and connecting recess 221 can increase the contact area between the voice coil lead wire 23 and the voice coil body 22, thereby improving the bonding strength and preventing the connection between the voice coil lead wire 23 and the voice coil body 22, which are made of different materials, from breaking during use.

[0034] Furthermore, the voice coil lead 23 is made of copper, copper alloy, silver or silver alloy.

[0035] As can be seen from the above description, the material of the voice coil lead 23 can be selected according to actual use requirements or production conditions.

[0036] Furthermore, the voice coil lead wire 23 is an enameled wire.

[0037] As can be seen from the above description, the enameled wire has high strength and corrosion resistance, and the use of the enameled wire to make the voice coil lead 23 is beneficial to improving the service life of the sound unit.

[0038] Furthermore, the outer surface of the voice coil lead 23 is covered with an elastic layer 232 .

[0039] As can be seen from the above description, the elastic layer 232 can protect the lead wire, effectively reducing the risk of the voice coil lead wire 23 being broken due to excessive pulling force on the voice coil body 22 during vibration, which is beneficial to enhancing the reliability of the sound unit and extending the service life of the sound unit.

[0040] Furthermore, the voice coil body 22 is made of aluminum, aluminum alloy or copper-clad aluminum.

[0041] As can be seen from the above description, the material of the voice coil body 22 can be selected according to actual use requirements or production conditions.

[0042] Furthermore, the diaphragm assembly 21 includes an inner fixing portion 211 , a folding ring portion 212 and an outer fixing portion 213 sequentially connected from the inside to the outside, and the folding ring portion 212 includes a plurality of folding ring areas sequentially connected from the inside to the outside.

[0043] As can be seen from the above description, providing multiple folding ring areas can increase the deformation amount that can be generated by the diaphragm assembly 21, allowing the diaphragm assembly 21 to achieve vibration with a larger amplitude.

[0044] Furthermore, the diaphragm assembly 21 further includes a middle sticker 214 , and the middle sticker 214 is connected to the inner fixing portion 211 .

[0045] It can be seen from the above description that providing the middle sticker 214 can increase the rigidity of the diaphragm assembly 21 , improve the high-frequency response of the sound unit, and ensure the high-frequency characteristics of the diaphragm assembly 21 .

[0046] Furthermore, the magnetic circuit system 3 includes a yoke 31 and a magnet 32 ​​. The yoke 31 is provided on a side of the basin frame 1 away from the vibration system, and the magnet 32 ​​is connected to the inner side surface of the yoke 31 .

[0047] As can be seen from the above description, the yoke 31 plays a role of magnetic conductivity, thereby improving the sensitivity of the sound unit and reducing the distortion of the sound unit.

[0048] Furthermore, the magnetic steel 32 includes a central magnetic steel 32a and a plurality of side magnetic steels 32b, and the plurality of side magnetic steels 32b are arranged around the central magnetic steel 32a.

[0049] As can be seen from the above description, the multiple magnets 32 can increase the magnetic flux of the voice coil body 22 and improve the sensitivity of the sound unit.

[0050] Furthermore, the magnetic circuit system 3 further includes a washer 33 , and the washer 33 is connected to a side of the magnetic steel 32 away from the yoke 31 .

[0051] From the above description, it can be seen that the washer 33 plays a role of magnetic conduction, thereby improving the sensitivity of the sound unit and reducing the distortion of the sound unit.

[0052] Please refer to Figures 1 to 3 The first embodiment of the present invention is a sound unit comprising a frame 1 and a vibration system and magnetic circuit system 3 mounted on the frame 1. The vibration system comprises a diaphragm assembly 21, a voice coil body 22, and a voice coil lead 23. The diaphragm assembly 21 is connected to the frame 1. The voice coil body 22 is connected to the inner side of the diaphragm assembly 21. The voice coil lead 23 is connected to the voice coil body 22 and is made of a conductive material with greater ductility than the material of the voice coil body 22. The contact surface between the voice coil lead 23 and the voice coil body 22 is provided with a connecting protrusion 231 and a connecting recess 221 that mates with the connecting protrusion 231. In this embodiment, the voice coil lead 23 is an enameled wire. The voice coil lead 23 and the voice coil body 22 are connected by a high-temperature welding process. The connecting protrusion 231 has a rectangular cross-section parallel to the axial direction of the voice coil lead 23. In other embodiments, the connecting protrusion 231 may have a wavy cross-section. Optionally, the voice coil lead 23 is made of copper, copper alloy, silver or silver alloy; the voice coil body 22 is made of aluminum, aluminum alloy or copper-clad aluminum.

[0053] To further extend the lifespan of the voice coil lead 23, an elastic layer 232 is coated on its outer surface. The elastic layer 232 is made of rubber or plastic. The elastic layer 232 provides the voice coil lead 23 with a certain degree of elasticity and damping, effectively reducing the vibration amplitude of the voice coil lead 23 itself, thereby effectively suppressing resonance. It also protects the voice coil lead 23 and effectively reduces the risk of breakage caused by excessive pulling force on the voice coil body 22 during vibration. This helps enhance the reliability of the sound unit and prolongs its lifespan.

[0054] As a preferred embodiment, the outer surface of the voice coil body 22 is coated with an elastic layer 232. Optionally, the elastic layer 232 coated on the voice coil body 22 and the elastic layer 232 coated on the voice coil lead 23 can be made of the same material or different materials.

[0055] The diaphragm assembly 21 includes an inner fixing portion 211, a folded ring portion 212, and an outer fixing portion 213, which are sequentially connected from the inside out. The folded ring portion 212 includes multiple folded ring areas, which are sequentially connected from the inside out. The outer edge of the outer fixing portion 213 is connected to the basin frame 1. In this embodiment, there are two folded ring areas. The provision of multiple folded ring areas can increase the deformation that the diaphragm assembly 21 can produce, allowing the diaphragm assembly 21 to achieve a larger amplitude of vibration.

[0056] The diaphragm assembly 21 further includes a middle sticker 214, which is connected to the inner fixing portion 211. Specifically, the inner fixing portion 211 is annular, and the middle sticker 214 is connected to the outer surface of the inner fixing portion 211 and covers the hollow area of ​​the inner fixing portion 211.

[0057] The magnetic circuit system 3 includes a yoke 31 and magnets 32. The yoke 31 is located on the side of the frame 1 away from the vibration system, and the magnets 32 are connected to the inner side of the yoke 31. Specifically, the magnets 32 include a central magnet 32a and four side magnets 32b. The four side magnets 32b are arranged around the central magnet 32a, forming a magnetic gap between the side magnets 32b and the central magnet 32a, allowing the voice coil body 22 to move. In other embodiments, the number of magnets 32 may be one, two, three, or more.

[0058] Magnetic circuit system 3 also includes a washer 33 connected to the side of magnetic steel 32 facing away from yoke 31. Washer 33 acts as a magnetic conductor, improving the sensitivity of the sound unit and reducing distortion. In this embodiment, there is only one washer 33, which is connected to the side of central magnetic steel 32a facing away from yoke 31.

[0059] In summary, the voice coil lead wire of the sound unit provided by the present invention can be made of a material with greater ductility than the voice coil body, thereby reducing the risk of the voice coil lead wire breaking during long-term vibration and improving the service life of the sound unit. The connecting boss and connecting recess increase the contact area between the voice coil lead wire and the voice coil body, improving the bonding strength and preventing the connection between the voice coil lead wire and the voice coil body from breaking during use.

[0060] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A sound unit comprising a basin frame and a vibration system and a magnetic circuit system provided on the basin frame, characterized in that: The vibration system comprises: A diaphragm assembly, wherein the diaphragm assembly is connected to the basin frame; a voice coil body connected to the inner side of the diaphragm assembly; A voice coil lead is connected to the voice coil body; a connecting protrusion and a connecting pit matching the connecting protrusion are respectively provided on the contact surface between the voice coil lead and the voice coil body.

2. The sound unit according to claim 1, characterized in that: The voice coil lead is made of copper, copper alloy, silver or silver alloy.

3. The sound unit according to claim 1, wherein: The voice coil lead wire is an enameled wire.

4. The sound unit according to claim 1, wherein: An elastic layer is coated on the outer surface of the voice coil lead.

5. The sound unit according to claim 1, characterized in that: The voice coil body is made of aluminum, aluminum alloy or copper-clad aluminum.

6. The sound unit according to claim 1, characterized in that: The diaphragm assembly includes an inner fixing portion, a folding ring portion and an outer fixing portion which are sequentially connected from the inside to the outside. The folding ring portion includes a plurality of folding ring areas which are sequentially connected from the inside to the outside.

7. The sound unit according to claim 6, characterized in that: The diaphragm assembly further includes a middle sticker connected to the inner fixing portion.

8. The sound unit according to claim 1, characterized in that: The magnetic circuit system includes a yoke and a magnetic steel. The yoke is arranged on a side of the basin frame away from the vibration system, and the magnetic steel is connected to the inner side surface of the yoke.

9. The sound unit according to claim 8, characterized in that: The magnetic steel includes a central magnetic steel and a plurality of side magnetic steels, and the plurality of side magnetic steels are arranged around the central magnetic steel.

10. The sound unit according to claim 8, characterized in that: The magnetic circuit system further includes a washer connected to a side of the magnetic steel away from the yoke.

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