Sound production monomer and electronic equipment

Abstract

The utility model relates to the technical field of electro-acoustic conversion, and provides a sounding monomer and electronic equipment, and the sounding monomer comprises a housing, a vibration system and a magnetic circuit system. The magnetic circuit system is fixed to the shell and comprises a magnetic conductive yoke and a magnetic circuit assembly, and the magnetic circuit assembly is provided with a plurality of magnetic gaps. The vibration system comprises a diaphragm assembly, a voice coil assembly and a centering disk, the voice coil assembly comprises voice coils which are in one-to-one correspondence with the plurality of magnetic gaps, the centering disk is located at one end, far away from the magnetic gaps, of the voice coil assembly, the outer periphery of the centering disk is fixed on the shell, and the side wall of at least one voice coil in the voice coil assembly is bonded with the centering disk. According to the utility model, the centring disk is optimally designed, so that the side walls of all voice coils can be bonded with the centring disk or the side walls of part of voice coils can be bonded with the centring disk between the voice coils and the centring disk, the thickness of the product is reduced, the ultrathin design requirement of the whole machine is met, the space of the front cavity of the module is increased, the smooth airflow is ensured, and the service life of the module is prolonged. And product tone quality is ensured.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic conversion technology, and in particular to a sound-generating unit and electronic device. Background Technology

[0002] In recent years, with the development of mobile phones, the performance requirements for speakers have become increasingly higher, which has led to an increased demand for improving speaker sensitivity. Due to the limitations of product structure and size, the only way to increase the sensitivity of the product is to increase the volume of the magnet as much as possible. This has resulted in the emergence of dual (multi) voice coil structures. However, for such dual (multi) voice coil structures, two or more voice coils need to be electrically connected through FPC or other methods. Therefore, ensuring the bonding between the centering support and the voice coil becomes a critical step.

[0003] Currently, conventional loudspeakers have only one voice coil. The centering support can be glued to the top, bottom, or even the side wall of the voice coil. However, for dual (or multi) voice coil structures, the simultaneous electrical connection of two or even N voice coils increases the required processes, leading to incompatibility of wiring and thus higher costs. This negatively impacts the market competitiveness of electronic products. Furthermore, the Z-axis bonding structure of the centering support to the voice coil increases the product thickness, affecting the overall thickness of the device. Utility Model Content

[0004] To overcome the shortcomings of the prior art mentioned above, this utility model provides a sound-generating unit and electronic device. By optimizing the design of the centering support, the voice coil and the centering support can be bonded together, either with all the sidewalls of the voice coil or with a portion of the sidewalls of the voice coil. This reduces the thickness of the product, meets the requirements of ultra-thin design, and increases the front cavity space of the module, ensuring smooth airflow and guaranteeing the sound quality of the product.

[0005] To solve the above-mentioned technical problems, the technical solution of this utility model is as follows:

[0006] A sound-generating unit includes: a shell, a vibration system, and a magnetic circuit system;

[0007] The magnetic circuit system is fixed to the outer shell. The magnetic circuit system includes a magnetic yoke and a magnetic circuit assembly disposed on the magnetic yoke. The magnetic circuit assembly has a plurality of magnetic gaps distributed sequentially from the inside to the outside.

[0008] The vibration system includes a diaphragm assembly, a voice coil assembly, and a centering support. The outer periphery of the diaphragm assembly is fixed to the housing. The voice coil assembly includes voice coils that are one-to-one opposite to the plurality of magnetic gaps. The centering support is located at the end of the voice coil assembly away from the magnetic gaps, and the outer periphery of the centering support is fixed to the housing. At least one sidewall of the voice coil in the voice coil assembly is bonded to the centering support.

[0009] According to some embodiments of the present invention, the centering support includes an outer fixing part, an inner fixing part, and at least one intermediate fixing part. The outer periphery of the outer fixing part is connected to the outer shell. An outer connecting part is provided between the outer fixing part and the intermediate fixing part. An inner connecting part is provided between the intermediate fixing part and the inner fixing part. At least one sidewall of the voice coil is bonded to the inner fixing part or the intermediate fixing part.

[0010] In some embodiments of this utility model, the voice coil assembly includes a first voice coil and a second voice coil, and the intermediate fixing part is one, wherein,

[0011] The end of the first voice coil furthest from the magnetic circuit system is connected to the intermediate fixing part, the end of the second voice coil furthest from the magnetic circuit system is connected to the diaphragm assembly, and the inner fixing part is connected to the side wall of the end of the second voice coil closest to the diaphragm assembly;

[0012] Alternatively, the end of the first voice coil furthest from the magnetic circuit system is connected to the diaphragm assembly, and the intermediate fixing part is connected to the side wall of the end of the first voice coil near the diaphragm assembly, and the end of the second voice coil furthest from the magnetic circuit system is connected to the inner fixing part;

[0013] Alternatively, the ends of both the first and second voice coils furthest from the magnetic circuit system are connected to the diaphragm assembly, the intermediate fixing part is connected to the side wall of the first voice coil near the diaphragm assembly, and the inner fixing part is connected to the side wall of the second voice coil near the diaphragm assembly.

[0014] In some embodiments of this utility model, the outer fixing part, the inner fixing part, and at least one intermediate fixing part are formed as an integrally molded planar spring sheet structure.

[0015] In some embodiments of this utility model, the diaphragm assembly includes a diaphragm and a vibrating plate disposed on the diaphragm;

[0016] The intermediate fixing part is one, and the diaphragm includes a first fixing part, a folded ring part, a second fixing part and a third fixing part arranged sequentially from the outside to the inside. A connecting arm is provided between the second fixing part and the third fixing part. The first fixing part is connected to the outer fixing part, the second fixing part is connected to the intermediate fixing part, and the third fixing part is connected to the inner fixing part.

[0017] According to some embodiments of this utility model, adjacent voice coils are nested together.

[0018] According to some embodiments of the present invention, the magnetic yoke includes a first mounting portion, a second mounting portion, and a third mounting portion arranged sequentially from the outside to the inside. The magnetic circuit assembly includes a central magnetic portion and a plurality of side magnetic portions arranged sequentially from the inside to the outside around the central magnetic portion. A plurality of magnetic gaps are formed between the central magnetic portion, the side magnetic portions, and adjacent side magnetic portions arranged sequentially from the inside to the outside. The outermost side magnetic portion is mounted on the first mounting portion, the side magnetic portion located in the middle position is mounted on the second mounting portion, and the central magnetic portion is mounted on the third mounting portion.

[0019] The first mounting part, the second mounting part, and the third mounting part are formed as an integral structure.

[0020] In some embodiments of this utility model, a first groove is provided between the first mounting part and the second mounting part, and a second groove is provided between the second mounting part and the third mounting part. The first groove and the second groove are correspondingly provided with the voice coil in the voice coil assembly.

[0021] According to some embodiments of the present invention, the voice coil assembly includes N voice coils, and the centering support is provided with a pad electrically connected to the lead portion of the voice coil assembly, wherein the N voice coils are connected in parallel or in series.

[0022] The present invention also proposes an electronic device, which includes a sound-generating unit according to the above embodiments of the present invention.

[0023] After adopting the above technical solution, the beneficial effects of this utility model are:

[0024] According to an embodiment of this utility model, the sound-generating unit includes a shell, a vibration system, and a magnetic circuit system. The magnetic circuit system includes a magnetic yoke and a magnetic circuit assembly disposed on the magnetic yoke. The magnetic circuit assembly has multiple magnetic gaps distributed sequentially from the inside to the outside. The vibration system includes a diaphragm assembly, a voice coil assembly, and a centering support. The outer periphery of the diaphragm assembly is fixed to the shell. The voice coil assembly includes voice coils that are one-to-one opposite to the multiple magnetic gaps. The centering support is located at the end of the voice coil assembly away from the magnetic gaps, and the outer periphery of the centering support is fixed to the shell. At least one voice coil in the voice coil assembly has its sidewall bonded to the centering support. Thus, by setting multiple voice coils and multiple opposing magnetic gaps, the sound-generating sensitivity of the sound-generating unit is improved. By bonding the sidewall of the voice coil to the centering support, compared with the traditional bonding of the voice coil and the centering support in the Z-axis direction, the thickness of the product is reduced, meeting the requirements of ultra-thin design of the whole machine. At the same time, the front cavity space of the module is increased, ensuring smooth airflow and ensuring the sound quality of the product.

[0025] In summary, this utility model provides a sound-generating unit and electronic device. By optimizing the design of the centering support, the sidewalls of the voice coil and the centering support can be bonded to the centering support, either entirely or partially. This reduces the product thickness, meets the requirements of an ultra-thin design, and simultaneously increases the front cavity space of the module, ensuring smooth airflow and guaranteeing the product's sound quality. Attached Figure Description

[0026] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort. In addition, the elements or parts in the drawings are not necessarily drawn to actual scale.

[0027] Figure 1 This is a schematic diagram of the exploded structure of a sound-generating unit according to an embodiment of the present invention;

[0028] Figure 2 This is a cross-sectional structural schematic diagram of a sound-generating unit according to an embodiment of the present invention;

[0029] Figure 3 This is a schematic diagram of the structure of a centering support piece according to an embodiment of the present invention;

[0030] Figure 4 This is a schematic diagram of the structure of a diaphragm according to an embodiment of the present invention;

[0031] Figure 5 This is a schematic diagram of the structure of a magnetically conductive yoke according to an embodiment of the present invention;

[0032] Figure 6 This is a cross-sectional structural schematic diagram of a sound-generating unit according to another embodiment of the present invention;

[0033] Figure 7 This is a schematic diagram of the centering support plate according to another embodiment of the present invention;

[0034] Figure label:

[0035] 1. Outer shell; 2. Magnetic circuit system; 201. Magnetic yoke; 2011. First mounting part; 2012. Second mounting part; 2013. Third mounting part; 2014. First groove; 2015. Second groove; 202. Magnetic circuit assembly; 2021. Central magnetic part; 20211. Central magnet; 20212. Central magnetic plate; 2022. Side magnetic part; 20221. Side magnet; 20222. Side magnetic plate;

[0036] 3. Vibration system, 301. Diaphragm assembly, 3011. Diaphragm, 30111. First fixing part, 30112. Folded ring part, 30113. Second fixing part, 30114. Third fixing part, 30115. Connecting arm, 3012. Vibrating plate, 302. Voice coil assembly, 3021. First voice coil, 3022. Second voice coil, 303. Centering support, 3031. Outer fixing part, 3032. Inner fixing part, 3033. Intermediate fixing part, 3034. Outer connecting part, 3035. Inner connecting part;

[0037] 4. Magnetic gap, 5. First pad, 6. Second pad, 100. Sound-emitting unit. Detailed Implementation

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that all directional indicators (such as up, down, left, right, front, back, etc.) in this utility model embodiment are only used to explain the relative positional relationship and movement of each component in a certain specific posture (as shown in the figure). If the specific posture changes, the directional indicator will also change accordingly.

[0040] Meanwhile, the meaning of "and / or" or "and / or" appearing throughout the text is that it includes three options. Taking "A and / or B" as an example, it includes option A, option B, or an option that satisfies both A and B.

[0041] Furthermore, in this utility model, descriptions involving "first," "second," etc., are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Therefore, a feature defined with "first" or "second" may explicitly or implicitly include at least one of that feature. Additionally, the technical solutions of the various embodiments can be combined with each other, but only on the basis of being achievable by those skilled in the art. When the combination of technical solutions is contradictory or impossible to implement, such a combination of technical solutions should be considered non-existent and not within the scope of protection claimed by this utility model.

[0042] This utility model proposes a sound-generating unit 100. It is understood that the sound-generating unit 100 is applied to electronic devices, such as mobile phones, speakers, computers, headphones, watches, televisions or tablet computers, etc., and is not limited thereto.

[0043] like Figures 1-7 As shown, the sound-generating unit 100 according to an embodiment of the present invention includes: a shell 1, a vibration system 3, and a magnetic circuit system 2;

[0044] The magnetic circuit system 2 is fixed to the outer shell 1. The magnetic circuit system 2 includes a magnetic yoke 201 and a magnetic circuit assembly 202 disposed on the magnetic yoke 201. The magnetic circuit assembly 202 is provided with a plurality of magnetic gaps 4 distributed sequentially from the inside to the outside.

[0045] The vibration system 3 includes a diaphragm assembly 301, a voice coil assembly 302, and a centering support 303. The outer periphery of the diaphragm assembly 301 is fixed to the outer shell 1. The voice coil assembly 302 includes voice coils that are one-to-one with a plurality of magnetic gaps 4. When energized, the voice coil assembly 302 reciprocates under the action of the magnetic field force in the magnetic gaps 4, and drives the diaphragm assembly 301 to vibrate and produce sound. The centering support 303 is located at the end of the voice coil assembly 302 away from the magnetic gaps 4, and the outer periphery of the centering support 303 is fixed to the outer shell 1. The centering support 303 provides good support for the voice coil assembly 302. The sidewall of at least one voice coil in the voice coil assembly 302 is bonded to the centering support 303.

[0046] Specifically, the magnetic circuit assembly 202 has multiple magnetic gaps 4 arranged sequentially from the inside to the outside. The vibration system 3 includes a diaphragm assembly 301, a voice coil assembly 302, and a centering support 303. The voice coil assembly 302 includes voice coils that are one-to-one with the multiple magnetic gaps 4. By setting multiple voice coils and multiple opposing magnetic gaps 4, the sound generation sensitivity of the sound-generating unit 100 is improved. The centering support 303 is located at the end of the voice coil assembly 302 away from the magnetic gaps 4, and the outer periphery of the centering support 303 is fixed to the outer shell 1. At least one voice coil in the voice coil assembly 302 has its sidewall bonded to the centering support 303. By bonding the sidewall of the voice coil to the centering support 303, compared with the traditional bonding of the voice coil and the centering support in the Z-axis direction, the thickness of the product is reduced, meeting the requirements of the ultra-thin design of the whole machine. At the same time, the front cavity space of the module is increased, ensuring smooth airflow and ensuring the sound quality of the product.

[0047] like Figures 1-3 and Figures 6-7 As shown, in some embodiments of this utility model, the centering support 303 includes an outer fixing part 3031, an inner fixing part 3032, and at least one intermediate fixing part 3033. The outer periphery of the outer fixing part 3031 is connected to the outer shell 1. By connecting the outer periphery of the outer fixing part 3031 to the outer shell 1, the centering support 303 is fixed. An outer connecting part 3034 is provided between the outer fixing part 3031 and the intermediate fixing part 3033, and an inner connecting part 3035 is provided between the intermediate fixing part 3033 and the inner fixing part 3032. In this embodiment... Both the outer connecting part 3034 and the inner connecting part 3035 have elastic deformation function, thereby ensuring the vibration effect of the voice coil connected to the inner fixing part 3032 and the middle fixing part 3033, so as not to affect the acoustic effect. At least one side wall of the voice coil is bonded to the inner fixing part 3032 or the middle fixing part 3033. By bonding the side wall of the voice coil to the inner fixing part 3032 or the middle fixing part 3033, the thickness of the product is reduced, meeting the requirements of the ultra-thin design of the whole machine. At the same time, the front cavity space of the module is increased, ensuring smooth airflow and ensuring the sound quality of the product.

[0048] like Figures 1-3 and Figures 6-7 As shown, in this embodiment of the present invention, the voice coil assembly 302 includes a first voice coil 3021 and a second voice coil 3022, and a single intermediate fixing part 3033.

[0049] The end of the first voice coil 3021 furthest from the magnetic circuit system 2 is connected to the intermediate fixing part 3033, and the end of the second voice coil 3022 furthest from the magnetic circuit system 2 is connected to the diaphragm assembly 301. The inner fixing part 3032 is connected to the side wall of the end of the second voice coil 3022 closest to the diaphragm assembly 301. By connecting the inner fixing part 3032 to the side wall of the second voice coil 3022, the thickness of the product is reduced. At the same time, under the premise of the same product height, the coil length of the voice coil can be increased, the BL value of the product can be increased, and the sound sensitivity of the sound-producing unit can be improved to a certain extent.

[0050] In some other embodiments of this utility model, the end of the first voice coil 3021 away from the magnetic circuit system 2 is connected to the diaphragm assembly 301, and the middle fixing part 3033 is connected to the side wall of the end of the first voice coil 3021 near the diaphragm assembly 301. The end of the second voice coil 3022 away from the magnetic circuit system 2 is connected to the inner fixing part 3032. The above design structure can also reduce the product thickness. At the same time, under the premise of the same product height, it can also increase the coil length of the voice coil, increase the BL value of the product, and improve the sound sensitivity of the sound-producing unit to a certain extent.

[0051] In some embodiments of this utility model, the ends of the first voice coil 3021 and the second voice coil 3022 furthest from the magnetic circuit system 2 are both connected to the diaphragm assembly 301. The intermediate fixing part 3033 is connected to the side wall of the end of the first voice coil 3021 near the diaphragm assembly 301, and the inner fixing part 3032 is connected to the side wall of the end of the second voice coil 3022 near the diaphragm assembly 301. By connecting the intermediate fixing part 3033 to the side wall of the end of the first voice coil 3021 near the diaphragm assembly 301 and the inner fixing part 3032 to the side wall of the end of the second voice coil 3022 near the diaphragm assembly 301, the first voice coil 3021 and the second voice coil 3022 are placed in the same Z-axis height range, which more effectively reduces the product thickness and achieves a reduction in the Z-axis height of the product, thereby realizing an ultra-thin design of the whole machine. At the same time, it increases the front cavity space of the module, ensuring smooth airflow and ensuring the sound quality of the product.

[0052] like Figure 3 and Figure 7 As shown in the embodiment of this utility model, the outer fixing part 3031, the inner fixing part 3032 and at least one intermediate fixing part 3033 are formed into an integrally molded planar spring structure. The integrally molded planar spring structure is easy to process, which can simplify the process flow and reduce costs.

[0053] exist Figure 3In the specific example shown, the centering support 303 includes an outer fixing part 3031, a middle fixing part 3033, and an inner fixing part 3032. The outer fixing part 3031, the middle fixing part 3033, and the inner fixing part 3032 are all formed into a square structure. An outer connecting part 3034 is provided between the outer fixing part 3031 and the middle fixing part 3033, and an inner connecting part 3035 is provided between the middle fixing part 3033 and the inner fixing part 3032. The centering support 303 also includes a first pad 5 located on the middle fixing part 3033 and a second pad 6 located on the inner fixing part 3032. The first pads 5 are two pads located diagonally opposite each other on the middle fixing part 3033, and the second pads 6 are two pads located diagonally opposite each other on the inner fixing part 3032. Further, along the diagonal direction of the centering support 303, the two first pads 5 and the two second pads 6 are located on the same diagonal line.

[0054] like Figures 1-2 and Figure 4 As shown, in this embodiment of the present invention, the diaphragm assembly 301 includes a diaphragm 3011 and a vibrating plate 3012 disposed on the diaphragm 3011;

[0055] There is one intermediate fixing part 3033. The diaphragm 3011 includes a first fixing part 30111, a folded ring part 30112, a second fixing part 30113, and a third fixing part 30114 arranged sequentially from the outside to the inside. A connecting arm 30115 is provided between the second fixing part 30113 and the third fixing part 30114. The first fixing part 30111 is connected to the outer fixing part 3031, the second fixing part 30113 is connected to the intermediate fixing part 3033, and the third fixing part 30114 is connected to the inner fixing part. The first fixing part 30111, the second fixing part 30113 and the third fixing part 30114 of the diaphragm 3011 are connected to the outer fixing part 3031, the middle fixing part 3033 and the inner fixing part 3032 of the centering support plate 303, respectively. The shape of the connecting arm 30115 is the same as that of the inner connecting part 3035 of the centering support plate 303, which plays a role in auxiliary support, maintaining structural balance, ensuring sound quality, and reducing the weight of the diaphragm 3011.

[0056] like Figures 1-2 and Figure 6 As shown, in some embodiments of this utility model, adjacent voice coils are nested together. By nesting adjacent voice coils, the thickness of the product is reduced, the Z-axis height of the product is reduced, thereby achieving an ultra-thin design of the whole machine. At the same time, the front cavity space of the module is increased to ensure smooth airflow and ensure the sound quality of the product.

[0057] like Figures 1-2 and Figure 5As shown, in this embodiment of the present invention, the magnetic yoke 201 includes a first mounting portion 2011, a second mounting portion 2012, and a third mounting portion 2013 arranged sequentially from the outside to the inside. The magnetic circuit assembly 202 includes a central magnetic portion 2021 and a plurality of side magnetic portions 2022 arranged sequentially from the inside to the outside around the central magnetic portion 2021. A plurality of magnetic gaps 4 are formed sequentially from the inside to the outside between the central magnetic portion 2021, the side magnetic portions 2022, and adjacent side magnetic portions 2022. The outermost side magnetic portion 2022 is mounted on the first mounting portion 2011, the side magnetic portion 2022 located in the middle position is mounted on the second mounting portion 2012, and the central magnetic portion 2021 is mounted on the third mounting portion 2013. Through the above structural design, adjacent magnetic gaps 4 can share a magnetic portion, thereby simplifying the structural design, reducing the product volume, reducing production costs, and improving the product's competitive advantage in the market.

[0058] In addition, in this embodiment, the central magnetic part 2021 includes a central magnet 20211 and a central magnetic guide plate 20212. The central magnet 20211 is mounted on the third mounting part 2013, and the central magnetic guide plate 20212 is mounted on the side of the central magnet 20211 away from the third mounting part 2013.

[0059] The side magnetic part 2022 includes a side magnet 20221 and a side magnetic guide plate 20222. The side magnet 20221 is mounted on the first mounting part 2011 or the second mounting part 2012 and is arranged around the central magnet 20211. The side magnetic guide plate 20222 is mounted on the side of the side magnet 20221 away from the first mounting part 2011 or the second mounting part 2012 and is arranged around the central magnetic guide plate 20212. The outermost periphery of the side magnetic guide plate 20222 is connected to the outer shell 1.

[0060] The first mounting part 2011, the second mounting part 2012 and the third mounting part 2013 are formed into an integral structure. By designing the magnetic yoke 201 into an integral structure, the process can be simplified and the cost reduced.

[0061] like Figures 1-2 and Figures 5-6 As shown, in this embodiment of the present invention, a first groove 2014 is provided between the first mounting part 2011 and the second mounting part 2012, and a second groove 2015 is provided between the second mounting part 2012 and the third mounting part 2013. The first groove 2014 and the second groove 2015 are correspondingly arranged with the voice coil in the voice coil assembly 302. By setting the first groove 2014 and the second groove 2015, the voice coil is positioned to avoid contact with the magnetic yoke 201 when the voice coil vibrates, thus meeting the amplitude requirements of the vibration system 3. In this embodiment, the first groove 2014 and the second groove 2015 can be achieved by thinning the material.

[0062] like Figures 1-2 and Figure 6 As shown, in some embodiments of this utility model, the voice coil assembly 302 includes N voice coils, and the centering support 303 is provided with pads electrically connected to the lead portion of the voice coil assembly 302. The N voice coils are connected to their corresponding pads and are connected in parallel or in series through circuitry within the centering support, which can be selected according to actual usage requirements. For example, the number of pads can be 2N, with N voice coils connected in parallel. Alternatively, the number of pads can be 2N+1, with N voice coils connected in series.

[0063] This utility model also proposes an electronic device, which includes a sound-emitting unit 100. The specific structure of the sound-emitting unit 100 is as described in the foregoing embodiments. Since this electronic device adopts all the technical solutions of all the foregoing embodiments, it has at least all the beneficial effects brought about by the technical solutions of the foregoing embodiments, which will not be described in detail here.

[0064] In addition, the sound-generating unit 100 can also be assembled with the housing to form a sound-generating module, and then installed in an electronic device in the form of a sound-generating module.

[0065] Understandably, electronic devices can be mobile phones, speakers, computers, headphones, watches, televisions, or tablets, etc., and there are no restrictions here.

[0066] It should be understood that these embodiments are for illustrative purposes only and are not intended to limit the scope of protection of this utility model. Furthermore, it should be understood that after reading the technical description of this utility model, those skilled in the art can make various alterations, modifications, and / or variations to this utility model, and all such equivalent forms also fall within the scope of protection defined by the appended claims.

Claims

1. A sound-emitting unit, characterized in that: include: Housing, vibration system and magnetic circuit system; The magnetic circuit system is fixed to the housing, and the magnetic circuit system includes a magnetic yoke and a magnetic circuit component arranged on the magnetic yoke, and the magnetic circuit component is provided with a plurality of magnetic gaps distributed sequentially from the inside to the outside; The vibration system includes a diaphragm assembly, a voice coil assembly and a centering support plate, wherein the outer periphery of the diaphragm assembly is fixed to the housing, the voice coil assembly includes voice coils corresponding to the plurality of magnetic gaps one by one, the centering support plate is located at one end of the voice coil assembly away from the magnetic gap, and the outer periphery of the centering support plate is fixed to the housing, wherein the side wall of at least one voice coil in the voice coil assembly is bonded to the centering support plate.

2. The sound-emitting unit according to claim 1, characterized in that: The centering support plate includes an outer fixing part, an inner fixing part and at least one intermediate fixing part, the outer periphery of the outer fixing part is connected to the outer shell, an outer connecting part is provided between the outer fixing part and the intermediate fixing part, an inner connecting part is provided between the intermediate fixing part and the inner fixing part, and at least one side wall of the voice coil is bonded to the inner fixing part or the intermediate fixing part.

3. The sound-emitting unit according to claim 2, characterized in that: The voice coil assembly comprises a first voice coil and a second voice coil, and the middle fixing part is one, wherein: One end of the first voice coil away from the magnetic circuit system is connected to the middle fixing portion, one end of the second voice coil away from the magnetic circuit system is connected to the diaphragm assembly, and the inner fixing portion is connected to a side wall of one end of the second voice coil close to the diaphragm assembly; Or, one end of the first voice coil away from the magnetic circuit system is connected to the diaphragm assembly, and the intermediate fixing portion is connected to the side wall of one end of the first voice coil close to the diaphragm assembly, and one end of the second voice coil away from the magnetic circuit system is connected to the inner fixing portion; Alternatively, the first voice coil and the second voice coil are connected to the diaphragm assembly at one end away from the magnetic circuit system, the middle fixing portion is connected to the side wall of the first voice coil at one end close to the diaphragm assembly, and the inner fixing portion is connected to the side wall of the second voice coil at one end close to the diaphragm assembly.

4. The sound-emitting unit according to claim 2, characterized in that: The outer fixing portion, the inner fixing portion and the at least one intermediate fixing portion are formed into an integrally formed planar spring sheet structure.

5. The sound-emitting unit according to claim 2, characterized in that: The diaphragm assembly comprises a diaphragm and a vibration plate arranged on the diaphragm; There is one intermediate fixing part, and the diaphragm includes a first fixing part, a folding ring part, a second fixing part and a third fixing part which are arranged in sequence from the outside to the inside. A connecting arm is provided between the second fixing part and the third fixing part, the first fixing part is connected to the outer fixing part, the second fixing part is connected to the intermediate fixing part, and the third fixing part is connected to the inner fixing part.

6. The sound-emitting unit according to claim 1, characterized in that: Adjacent voice coils are nested.

7. The sound-emitting unit according to claim 1, characterized in that: The magnetic conductive yoke comprises a first mounting portion, a second mounting portion and a third mounting portion which are sequentially arranged from the outside to the inside, the magnetic circuit assembly comprises a central magnetic portion and a plurality of side magnetic portions which are arranged on the periphery of the central magnetic portion and sequentially distributed from the inside to the outside, a plurality of magnetic gaps which are sequentially distributed from the inside to the outside are formed between the central magnetic portion and the side magnetic portions and the adjacent side magnetic portions, the outermost side magnetic portion is mounted on the first mounting portion, the side magnetic portion located in the middle is mounted on the second mounting portion, and the central magnetic portion is mounted on the third mounting portion; The first mounting portion, the second mounting portion and the third mounting portion are formed as an integrally formed structure.

8. The sound-emitting unit according to claim 7, characterized in that: A first groove is provided between the first mounting portion and the second mounting portion, a second groove is provided between the second mounting portion and the third mounting portion, and the first groove and the second groove are provided corresponding to the voice coil in the voice coil assembly.

9. The sound-emitting unit according to any one of claims 1 to 8, characterized in that: The voice coil assembly includes N voice coils, and the centering support is provided with a pad electrically connected to a lead portion of the voice coil assembly, wherein the N voice coils are connected in parallel or in series.

10. An electronic device, characterized in that: The electronic device comprises the sound-emitting unit according to any one of claims 1 to 9.

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