Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a frame, a vibration system and a magnetic circuit system, wherein the vibration system and the magnetic circuit system are arranged on the frame; the vibration system comprises a diaphragm assembly, a voice coil main body, a conductive plate and an outer 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, and a voice coil lead is arranged on the voice coil main body; one end of the conductive plate is connected with the voice coil lead; one end of the outer lead is connected with one end of the conductive plate away from the voice coil lead. The voice coil lead of the sound production unit is connected with the outer lead through the conductive plate, and compared with a voice coil lead led out from the voice coil main body, the outer lead can be made of a material with better ductility, so that the risk of breakage in a long-term vibration process is reduced, and the service life of the sound production unit is prolonged.

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 conductor material of the existing sound unit voice coil enameled wire is usually made of light-density materials, such as aluminum, copper-clad aluminum, etc. However, the light-density materials such as aluminum or copper-clad aluminum have poor ductility. As the amplitude of the existing sound unit increases, the pulling force and stress on the outer lead of the voice coil increase accordingly. During long-term use or reliability testing, the wire is very likely to break. 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, wherein the outer lead wire connected to the voice coil 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: a sound unit includes a basin frame and a vibration system and a magnetic circuit system provided 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 and provided with a voice coil lead;

[0008] a conductive plate, one end of which is connected to the voice coil lead;

[0009] An external lead, one end of which is connected to an end of the conductive plate away from the voice coil lead.

[0010] Furthermore, the conductive plate is a flexible circuit board or a rigid circuit board.

[0011] Furthermore, the external lead is made of copper, copper alloy, silver or silver alloy.

[0012] Furthermore, the outer lead is covered with an elastic layer.

[0013] Furthermore, the conductive plate is connected to the inner side surface of the diaphragm assembly.

[0014] 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.

[0015] Furthermore, the diaphragm assembly also includes a middle sticker, which is connected to the inner fixing portion.

[0016] Furthermore, an air-avoiding groove is provided on the magnetic circuit system corresponding to the conductive plate.

[0017] 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.

[0018] Furthermore, the magnetic circuit system also includes a washer, which is connected to a side of the magnetic steel away from the yoke, and the air-avoiding groove is provided on the washer.

[0019] The beneficial effect of the present invention is that the voice coil lead of the sound unit is connected to the external lead through a conductive plate. Compared with the voice coil lead led out from the voice coil body, the external lead can be made of a material with better ductility, thereby reducing the risk of breakage during long-term vibration, which is beneficial to improving the service life of the sound unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] 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;

[0021] Figure 2 This is a cross-sectional view of the sound unit of the first embodiment of the present invention;

[0022] Figure 3 This is an exploded view of the sound unit of the first embodiment of the present invention;

[0023] Figure 4 This is a partial structural diagram of the sound unit of Example 1 of the present utility model (with the diaphragm assembly hidden);

[0024] Figure 5 This is a cross-sectional view of the external lead and the elastic layer in the sound unit of the first embodiment of the present invention.

[0025] Description of labels:

[0026] 1. Basin rack;

[0027] 2. Vibration system; 21. Diaphragm assembly; 211. Inner fixing portion; 212. Flanged ring portion; 213. Outer fixing portion; 214. Middle patch; 22. Voice coil body; 23. Voice coil lead wire; 24. Conductive plate; 25. Outer lead wire; 251. Elastic layer;

[0028] 3. Magnetic circuit system; 31. Yoke; 32. Magnet; 33. Washer; 331. Air-avoidance groove. DETAILED DESCRIPTION

[0029] 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.

[0030] Please refer to Figures 1 to 5 A sound unit includes a basin frame 1 and a vibration system 2 and a magnetic circuit system 3 provided on the basin frame 1, wherein the vibration system 2 includes:

[0031] A diaphragm assembly 21, wherein the diaphragm assembly 21 is connected to the basin frame 1;

[0032] A voice coil body 22 , the voice coil body 22 being connected to the inner side of the diaphragm assembly 21 , and a voice coil lead 23 being provided on the voice coil body 22 ;

[0033] a conductive plate 24 , one end of which is connected to the voice coil lead 23 ;

[0034] The external lead 25 has one end connected to an end of the conductive plate 24 away from the voice coil lead 23 .

[0035] From the above description, it can be seen that the beneficial effect of the present invention is that the voice coil lead 23 of the sound unit is connected to the external lead 25 through the conductive plate 24. Compared with the voice coil lead 23 led out from the voice coil body 22, the external lead 25 can be made of a material with better ductility, thereby reducing the risk of breakage during long-term vibration, which is beneficial to improving the service life of the sound unit.

[0036] Furthermore, the conductive plate 24 is a flexible circuit board or a rigid circuit board.

[0037] As can be seen from the above description, the type of the conductive plate 24 can be selected according to actual use requirements or production conditions.

[0038] Furthermore, the external lead 25 is made of copper, copper alloy, silver or silver alloy.

[0039] As can be seen from the above description, the material of the external lead 25 can be selected according to actual use requirements or production conditions.

[0040] Furthermore, the outer lead 25 is covered with an elastic layer 251 .

[0041] As can be seen from the above description, the elastic layer 251 can protect the lead wire, effectively reducing the risk of the lead wire 25 being broken due to excessive pulling force on the external lead wire 25 by 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.

[0042] Furthermore, the conductive plate 24 is connected to the inner side surface of the diaphragm assembly 21 .

[0043] As can be seen from the above description, connecting the conductive plate 24 to the diaphragm assembly 21 can prevent the conductive plate 24 from shaking too much relative to the external lead 25, thereby preventing the connection between the conductive plate 24 and the external lead 25 from breaking.

[0044] 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.

[0045] 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.

[0046] Furthermore, the diaphragm assembly 21 further includes a middle sticker 214 , and the middle sticker 214 is connected to the inner fixing portion 211 .

[0047] 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 .

[0048] Furthermore, a clearance groove 331 is provided on the magnetic circuit system 3 corresponding to the conductive plate 24 .

[0049] As can be seen from the above description, the provision of the air-avoiding groove 331 can prevent the conductive plate 24 from colliding with the magnetic circuit system 3 and causing breakage of the conductive plate 24 , the connection between the conductive plate 24 and the voice coil lead 23 , and the connection between the conductive plate 24 and the external lead 25 .

[0050] 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 2 , and the magnet 32 ​​is connected to the inner side surface of the yoke 31 .

[0051] 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.

[0052] Furthermore, the magnetic circuit system 3 further includes a washer 33 . The washer 33 is connected to a side of the magnetic steel 32 away from the yoke 31 . The washer 33 is provided with the air-avoiding groove 331 .

[0053] 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.

[0054] Please refer to Figures 1 to 5 , Embodiment 1 of the present invention is: a sound unit, which is widely used in electronic devices such as mobile phones, headphones, laptops, hearing aids, etc. as an audio output element.

[0055] The sound-producing unit includes a frame 1, a vibration system 2, and a magnetic circuit system 3 mounted on the frame 1. The vibration system 2 includes a diaphragm assembly 21, a voice coil body 22, a conductive plate 24, and an external lead 25. 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, and a voice coil lead 23 is provided on the voice coil body 22. One end of the conductive plate 24 is connected to the voice coil lead 23; and one end of the external lead 25 is connected to the end of the conductive plate 24 away from the voice coil lead 23. Specifically, there are two voice coil leads 23, one connecting the positive and negative poles of the voice coil, respectively. The number of voice coil leads 23, conductive plate 24, and external leads 25 corresponds to one another. The material of the external lead 25 is more ductile than that of the voice coil lead 23. In this embodiment, the conductive plate 24 is a flexible printed circuit board. Conductive plate 24 has solder pads at each end, connecting the voice coil lead 23 and the external lead 25 via the two solder pads. In other embodiments, conductive plate 24 can also be a rigid circuit board. Voice coil lead 23 can be made of materials including, but not limited to, aluminum, aluminum alloy, and copper-clad aluminum, while external lead 25 can be made of materials including, but not limited to, copper, copper alloy, silver, and silver alloy.

[0056] like Figure 5 As shown, as a preferred embodiment, the outer lead 25 is coated with an elastic layer 251. The elastic layer 251 is made of rubber or plastic. The presence of the elastic layer 251 provides a certain degree of elasticity and damping to the outer lead 25, effectively reducing the vibration amplitude of the outer lead 25 itself, thereby effectively suppressing resonance. It also protects the outer lead 25 and effectively reduces the risk of breakage caused by excessive pulling force on the outer lead 25 during vibration of the voice coil body 22. This helps to enhance the reliability of the sound unit and extend its service life.

[0057] like Figure 2 As shown, in order to prevent the conductive plate 24 from shaking too much relative to the external lead 25 and causing the connection between the conductive plate 24 and the external lead 25 to break, the conductive plate 24 is connected to the inner side of the diaphragm assembly 21. Specifically, the conductive plate 24 is connected to the diaphragm assembly 21 through UV glue.

[0058] like Figure 1 and Figure 2As shown, the diaphragm assembly 21 includes an inner fixing portion 211, a folding ring portion 212, and an outer fixing portion 213, which are sequentially connected from the inside out. The folding ring portion 212 includes multiple folding 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 folding ring areas. Providing multiple folding ring areas can increase the deformation that the diaphragm assembly 21 can produce, allowing the diaphragm assembly 21 to achieve larger amplitude vibration.

[0059] like Figure 1 and Figure 2 As shown, the diaphragm assembly 21 further includes a center patch 214, which is connected to the inner fixing portion 211. Specifically, the inner fixing portion 211 is annular, and the center patch 214 is connected to the outer surface of the inner fixing portion 211 and covers the hollow area of ​​the inner fixing portion 211. The conductive plate 24 is connected to the inner side of the center patch 214.

[0060] like Figure 2 and Figure 3 As shown, to ensure sufficient amplitude for the vibration system 2, a clearance groove 331 is provided on the magnetic circuit system 3 corresponding to the conductive plate 24. Specifically, the magnetic circuit system 3 includes a yoke 31 and a magnet 32. The yoke 31 is located on the side of the basin frame 1 away from the vibration system 2, and the magnet 32 ​​is connected to the inner side of the yoke 31. The magnetic circuit system 3 also includes a washer 33, which is connected to the side of the magnet 32 ​​away from the yoke 31 and has a clearance groove 331 provided therein.

[0061] To sum up, the voice coil lead of the sound unit provided by the present invention is connected to the external lead through a conductive plate. Compared with the voice coil lead led out from the voice coil body, the external lead can be made of a material with better ductility, thereby reducing the risk of breakage during long-term vibration, which is beneficial to improving the service life of the sound unit.

[0062] 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 frame and a vibration system and a magnetic circuit system provided on the 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 and provided with a voice coil lead; a conductive plate, one end of which is connected to the voice coil lead; An external lead, one end of which is connected to an end of the conductive plate away from the voice coil lead.

2. The sound unit according to claim 1, characterized in that: The conductive plate is a flexible circuit board or a rigid circuit board.

3. The sound unit according to claim 1, wherein: The external lead is made of copper, copper alloy, silver or silver alloy.

4. The sound unit according to claim 1, wherein: The outer lead is covered with an elastic layer.

5. The sound unit according to claim 1, characterized in that: The conductive plate is connected to the inner side surface of the diaphragm assembly.

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 is provided with an air-avoiding groove corresponding to the conductive plate.

9. The sound unit according to claim 8, 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.

10. The sound unit according to claim 9, characterized in that: The magnetic circuit system further includes a washer connected to a side of the magnetic steel away from the yoke, and the air-avoiding groove is provided on the washer.

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