Sound production monomer and sound production module

Abstract

The utility model discloses a kind of sounding monomer and sounding module, it is related to sound energy conversion technical field, wherein, sounding monomer includes shell, magnetic circuit system and vibration system, shell inside forms accommodating cavity;Magnetic circuit system is located in accommodating cavity, magnetic circuit system includes first magnetic circuit and second magnetic circuit, first magnetic circuit has at least two first magnetic gaps being arranged along second direction, second magnetic circuit has at least two second magnetic gaps being arranged along second direction;Vibration system includes diaphragm and at least two voice coils, each first magnetic gap corresponds one voice coil, diaphragm is provided with at least two through holes, each voice coil corresponds one through hole, through hole is arranged around the periphery of voice coil, voice coil is connected with diaphragm, voice coil is used to drive diaphragm to vibrate along first direction. Diaphragm is driven to move by at least two voice coils, to effectively improve the acoustic performance of sounding monomer.

Description

Technical Field

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

[0002] With the development of the portable consumer electronics market, miniature sound-generating devices have been widely used. Furthermore, with the multi-functional and miniaturized design of portable terminal electronic products, the demand for speakers is moving towards thinner and lighter designs. However, reducing the thickness of the speaker leads to a reduction in the thickness of the magnet, a decrease in the magnetic field strength, and consequently a weakening of the speaker's acoustic performance. Utility Model Content

[0003] The main purpose of this invention is to propose a sound-generating unit and a sound-generating module, aiming to solve the problem of how to improve the acoustic performance of a loudspeaker with a fixed thickness.

[0004] To achieve the above objectives, according to some embodiments of the present invention, the present invention provides a sound-generating unit, comprising:

[0005] A housing, the interior of which forms a receiving cavity;

[0006] A magnetic circuit system is located within the receiving cavity. The magnetic circuit system includes a first magnetic circuit and a second magnetic circuit spaced apart along a first direction. The first magnetic circuit has at least two first magnetic gaps arranged along a second direction, and the second magnetic circuit has at least two second magnetic gaps arranged along the second direction. The number of first magnetic gaps and second magnetic gaps are equal and they are arranged in a one-to-one correspondence. The first direction and the second direction are perpendicular to each other.

[0007] A vibration system includes a diaphragm and at least two voice coils, each first magnetic gap corresponding to one voice coil, the diaphragm having at least two through holes, each voice coil corresponding to one through hole, the through holes surrounding the periphery of the voice coils, the voice coils being connected to the diaphragm, and the voice coils driving the diaphragm to vibrate along a first direction; each voice coil includes a first body and a second body disposed opposite to each other along the first direction, the first body corresponding to the first magnetic gap, and the second body corresponding to the second magnetic gap.

[0008] In some embodiments, the first magnetic circuit includes a first common magnet and two first magnetic components, the two first magnetic components being disposed at a distance from each other on both sides of the first common magnet along the second direction to form two first magnetic gaps;

[0009] The second magnetic circuit includes a second common magnet and two second magnetic components. The two second magnetic components are spaced apart on both sides of the second common magnet along the second direction to form two second magnetic gaps.

[0010] In some embodiments, each of the first magnetic components includes a first magnet and a plurality of first side magnets. The plurality of first side magnets and the first common magnet are arranged in a ring around the periphery of the first magnet and are all spaced apart from the first magnet to form the first magnetic gap. The first common magnet and the first magnetic components are both magnetized along the first direction. The magnetization direction of the first common magnet is opposite to the magnetization direction of the first magnet and the same as the magnetization direction of the first side magnet.

[0011] Each of the second magnetic components includes a second magnet and a plurality of second side magnets. The plurality of second side magnets and the second common magnet are arranged in a ring around the periphery of the second magnet and are all spaced apart from the second magnet to form the second magnetic gap. The second common magnet and the second magnetic components are both magnetized along the first direction. The magnetization direction of the second common magnet is opposite to the magnetization direction of the second magnet and the same as the magnetization direction of the second side magnets. The magnetization direction of the second common magnet is opposite to the magnetization direction of the first common magnet.

[0012] In some embodiments, two first magnetic components are symmetrically arranged with respect to the first common magnet; two second magnetic components are symmetrically arranged with respect to the second common magnet.

[0013] And / or, the first magnetic circuit and the second magnetic circuit are arranged symmetrically with respect to the center of the housing.

[0014] In some embodiments, the diaphragm is located between the first magnetic circuit and the second magnetic circuit. The diaphragm includes a diaphragm body and a first reinforcing portion connected to the diaphragm body. Each of the through holes penetrates the diaphragm body and the first reinforcing portion. The diaphragm body includes an outer edge portion, a folded ring portion, and a central portion arranged sequentially from the outside to the inside. The first reinforcing portion is connected to the central portion, and each of the through holes penetrates the central portion and the first reinforcing portion. The outer edge portion is connected to the housing. The folded ring portion protrudes towards the second magnetic circuit, and the opening of the folded ring portion faces the first magnetic circuit.

[0015] In some embodiments, the diaphragm further includes a second reinforcing portion, the voice coil and the second reinforcing portion are of the same number and are arranged in a one-to-one correspondence, the second reinforcing portion is located in the inner ring of the voice coil, and the outer edge of the second reinforcing portion is connected to the inner wall of the voice coil.

[0016] In some embodiments, the outer edge of the second reinforcing portion is bent toward the direction of the first magnetic circuit to form an adhesive portion, which is bonded to the inner wall of the voice coil.

[0017] In some embodiments, the housing includes a first housing body and a second housing body, and the outer edge of the diaphragm is sandwiched between the first housing body and the second housing body; the sound-generating unit further includes a first magnetic yoke and a second magnetic yoke, the first magnetic yoke is disposed on the side of the first housing body opposite to the second housing body, the first housing body has a first clearance hole, the first magnetic circuit is disposed in the first clearance hole and fixed to the first magnetic yoke, the second magnetic yoke is disposed on the side of the second housing body opposite to the first housing body, the second housing body has a second clearance hole, the second magnetic circuit is disposed in the second clearance hole and fixed to the second magnetic yoke.

[0018] In some embodiments, the sound-generating unit further includes a first connector and a second connector spaced apart on both sides of the housing along the second direction, one end of the first connector being connected to the first magnetic yoke and the other end of the first connector being connected to the second magnetic yoke; one end of the second connector being connected to the first magnetic yoke and the other end of the second connector being connected to the second magnetic yoke.

[0019] According to some embodiments of the present invention, the present invention also proposes a sound-generating module, the sound-generating module comprising a housing and the aforementioned sound-generating unit, the sound-generating unit being disposed within the housing.

[0020] The technical solution of this utility model employs a first magnetic circuit and a second magnetic circuit spaced apart along a first direction, with at least two first magnetic gaps on the first magnetic circuit, which are arranged along a second direction. A second magnetic gap is also provided on the second magnetic circuit. The number of first and second magnetic gaps is the same and they correspond one-to-one. Each first magnetic gap corresponds to a voice coil. The diaphragm is driven by at least two voice coils, thereby effectively improving the acoustic performance of the speaker. Since the at least two voice coils are also spaced apart along the second direction rather than the first direction, they do not affect the thickness of the speaker in the first direction; thus, acoustic performance is improved with a fixed thickness. Furthermore, the diaphragm has a through-hole for the voice coils to pass through, ensuring the diaphragm is not above the voice coils. This eliminates the need for additional space above the voice coils for diaphragm vibration, helping to reduce the thickness of the speaker along the first direction. The saved space can be used to increase the volume of the original magnets, thereby improving the acoustic performance of the speaker with a fixed volume. Attached Figure Description

[0021] 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.

[0022] Figure 1 This is a schematic diagram of the sound-emitting unit from one perspective according to an embodiment of the present invention;

[0023] Figure 2 This is a schematic diagram of the sound-emitting unit from another perspective in an embodiment of this utility model;

[0024] Figure 3 This is a partial structural schematic diagram of one embodiment of the sound-emitting unit of this utility model;

[0025] Figure 4 This is a cross-sectional structural schematic diagram of one embodiment of the sound-emitting unit of this utility model;

[0026] Figure 5 for Figure 4 A magnified view of a portion at point A;

[0027] Figure 6 This is an exploded structural diagram of one embodiment of the sound-emitting unit of this utility model;

[0028] Figure 7 This is a schematic diagram of the structure of a centering support piece for the sound-generating unit in an embodiment of this utility model;

[0029] Figure 8 This is a schematic diagram of the frequency response curve of the sound-generating unit in an embodiment of this utility model.

[0030] Explanation of icon numbers:

[0031] 100. Sound-generating unit; 1. Housing; 11. Receiving cavity; 12. First housing body; 121. First clearance hole; 13. Second housing body; 131. Second clearance hole; 2. Magnetic circuit system; 21. First magnetic circuit; 211. First common magnet; 212. First magnetic assembly; 2121. First magnet; 2122. First side magnet; 22. Second magnetic circuit; 221. Second common magnet; 222. Second magnetic assembly; 2221. Second magnet; 2222. Second side magnet; 22221. Clearance space; 23. First magnetic space 24. Second magnetic gap; 3. Vibration system; 31. Diaphragm; 311. Diaphragm body; 3111. Outer edge; 3112. Hoop; 3113. Center; 312. First reinforcement; 313. Second reinforcement; 3131. Adhesive part; 32. Voice coil; 321. First body; 322. Second body; 41. First yoke; 42. Second yoke; 51. First connector; 52. Second connector; 6. Centering support; 61. First connecting part; 62. Second connecting part; 63. Spring arm; 7. Through hole.

[0032] The realization of the purpose, functional features and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings. Detailed Implementation

[0033] 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 scope of protection of the present utility model.

[0034] It should be noted that if the embodiments of this utility model involve directional indicators (such as up, down, left, right, front, back, etc.), the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture. If the specific posture changes, the directional indicators will also change accordingly.

[0035] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," these descriptions 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 those features. Additionally, the use of "and / or" or "and / or" throughout the text includes three parallel solutions. For example, "A and / or B" includes solution A, solution B, or a solution where both A and B are satisfied simultaneously. Furthermore, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0036] With the development of the portable consumer electronics market, miniature sound-generating devices have been widely used. Furthermore, with the multi-functional and miniaturized design of portable terminal electronic products, the demand for speakers is moving towards thinner and lighter designs. However, reducing the thickness of the speaker leads to a reduction in the thickness of the magnet, a decrease in the magnetic field strength, and consequently a weakening of the speaker's acoustic performance.

[0037] The inventors discovered that the existing methods for improving the acoustic performance of loudspeakers generally involve increasing the volume of the magnet to increase the magnetic field strength, thereby improving the performance of the loudspeaker. However, this method would undoubtedly lead to an overall increase in the size of the loudspeaker, which is clearly contrary to the trend of miniaturization of loudspeakers.

[0038] In view of this, the present invention proposes a sound-generating unit and a sound-generating module, aiming to solve the problem of how to improve the acoustic performance of a loudspeaker with a fixed volume.

[0039] Please see Figure 1 , Figure 4 and Figure 6In one embodiment of this utility model, the sound-generating unit 100 includes a housing 1, a magnetic circuit system 2, and a vibration system 3. A receiving cavity 11 is formed inside the housing 1. The magnetic circuit system 2 is located within the receiving cavity 11 and includes a first magnetic circuit 21 and a second magnetic circuit 22 spaced apart along a first direction. The first magnetic circuit 21 has at least two first magnetic gaps 23 arranged along a second direction, and the second magnetic circuit 22 has at least two second magnetic gaps 24 arranged along a second direction. The number of first magnetic gaps 23 and second magnetic gaps 24 are equal and they are arranged in a one-to-one correspondence. The direction is vertical; the vibration system 3 includes a diaphragm 31 and at least two voice coils 32, each first magnetic gap 23 corresponds to one voice coil 32, the diaphragm 31 has at least two through holes 7, each voice coil 32 corresponds to one through hole 7, the through holes 7 are arranged around the periphery of the voice coil 32, the voice coil 32 is connected to the diaphragm 31, and the voice coil 32 is used to drive the diaphragm 31 to vibrate along the first direction; each voice coil 32 includes a first body 321 and a second body 322 arranged opposite to each other along the first direction, the first body 321 corresponds to the first magnetic gap 23, and the second body 322 corresponds to the second magnetic gap 24.

[0040] The sound-emitting unit 100 of this invention can be a loudspeaker unit, and can be applied in the sound-emitting module of electronic devices, such as computers, mobile phones, smart wearable devices, laptops, virtual reality devices, augmented reality devices, mixed reality devices, or extended reality devices. This embodiment uses a loudspeaker unit as an example for illustration.

[0041] The technical solution of this utility model employs a first magnetic circuit 21 and a second magnetic circuit 22 spaced apart along a first direction, with at least two first magnetic gaps 23 arranged on the first magnetic circuit 21 along a second direction. The second magnetic circuit 22 has second magnetic gaps 24, with the number of first magnetic gaps 23 and second magnetic gaps 24 being identical and corresponding one-to-one. Each first magnetic gap 23 is equipped with a corresponding voice coil 32. The diaphragm 31 is driven to move by the at least two voice coils 32, thereby effectively increasing the BL value of the sound-generating unit 100 and improving its acoustic performance. Since the at least two voice coils 32 are also spaced apart along the second direction rather than the first direction, they do not affect the thickness of the sound-generating unit 100 in the first direction; thus, acoustic performance is improved with a fixed thickness. It should be noted that BL represents the product of the magnetic field strength of the loudspeaker and the length of the voice coil 32, i.e., the combination of B (magnetic flux density) and L (voice coil 32 length). B represents the magnetic flux density produced by the magnet, usually measured in Tesla (T); L is the effective length of the voice coil 32, usually measured in meters (m). The BL value is one of the key indicators for measuring a loudspeaker's driving capability. The BL value determines the loudspeaker's ability to convert electrical signals into sound. When current flows through the voice coil 32, a larger BL value results in a greater driving force, a higher sound pressure level, and a wider loudness and dynamic range. For example, in high-power loudspeaker systems, a higher BL value ensures that the loudspeaker maintains good sound performance even at high volume outputs. It should also be noted that the first direction is... Figure 4 The vertical direction is shown, and the second direction is... Figure 4 The left and right directions are shown.

[0042] Furthermore, the diaphragm 31 has through holes 7 for the voice coil 32 to pass through. The number of voice coils 32 and through holes 7 are the same and they are arranged one-to-one. The through holes 7 are arranged around the periphery of the corresponding voice coil 32. The wall of the through hole 7 is connected to the outer wall of the voice coil 32. Compared with the traditional loudspeaker where the diaphragm 31 is located above the voice coil 32 and the top surface of the voice coil 32 is connected to the bottom surface of the diaphragm 31, in this embodiment, the diaphragm 31 is not located above the voice coil 32. The voice coil 32 passes through the through holes 7, so that the diaphragm 31 is located between the top and bottom surfaces of the voice coil 32. Taking the diaphragm 31 located in the middle of the voice coil 32 as an example, since the diaphragm 31 is not located at the top of the voice coil 32, there is no need to reserve extra space above the voice coil 32 for the diaphragm 31 to vibrate. This helps to reduce the thickness of the sound-generating unit 100 along the first direction. At the same time, the space saved can be used to increase the volume of the original magnet, thereby improving the acoustic performance of the loudspeaker with a fixed volume. Specifically, the wall of the through hole 7 is bonded to the outer wall of the voice coil 32.

[0043] Furthermore, the inventors discovered that the diaphragm 31 of existing loudspeakers is generally located on the outside of the magnetic circuit system 2. Therefore, in addition to reserving space for the installation of the firmware itself, existing loudspeakers also require additional space for the vibration space of the diaphragm 31, resulting in a large space occupied by existing loudspeakers. With the trend of miniaturization in electronic devices, the installation space left for loudspeakers is gradually decreasing, making it increasingly difficult for existing loudspeakers to meet the needs of this trend. In this embodiment, by placing the diaphragm 31 between the first magnetic circuit 21 and the second magnetic circuit 22, the diaphragm 31 vibrates essentially within the vibration system 3. This effectively utilizes the gap between the first side magnet 2122 and the second side magnet 2222 as the vibration space for the diaphragm 31. Therefore, it is essentially unnecessary to allocate additional space outside the vibration system 3 for the vibration of the diaphragm 31, thereby reducing the space required for the installation of the sound-generating unit 100 and allowing the sound-generating unit 100 to better adapt to the miniaturization trend of electronic devices. The space saved, which was originally used for the vibration of the diaphragm 31, can be used to increase the volume of the magnets in the magnetic circuit system 2, thereby improving the acoustic performance of the sound-generating unit 100.

[0044] Furthermore, compared to a magnetic circuit system 2 with only one magnetic gap, i.e. a magnetic circuit with only a first magnetic gap 23 or a second magnetic gap 24, in this embodiment, the first body 321 of the voice coil 32 corresponds to the first magnetic gap 23, and the second body 322 corresponds to the second magnetic gap 24. This makes both ends of the voice coil 32 in similar magnetic field environments, which not only helps to improve the BL value, but also the distribution of magnetic field lines at both ends of the voice coil 32 is roughly the same, which helps to improve the flatness of the BL.

[0045] Please see Figure 3 , Figure 4 and Figure 6In some embodiments, the first magnetic circuit 21 includes a first common magnet 211 and two first magnetic components 212, which are spaced apart on both sides of the first common magnet 211 along a second direction to form two first magnetic gaps 23; the second magnetic circuit 22 includes a second common magnet 221 and two second magnetic components 222, which are spaced apart on both sides of the second common magnet 221 along a second direction to form two second magnetic gaps 24. Compared to the two first magnetic gaps 23 corresponding to two independent magnetic circuit systems 2 and vibration systems 3 respectively, in this embodiment, by setting a first common magnet 211, both first magnetic components 212 can share the magnetic field around the first common magnet 211 and form two first magnetic gaps 23 with the first common magnet 211. That is, two magnetic gaps are formed through one magnetic circuit system 2, making the structure of the magnetic circuit system 2 more compact and occupying less space, effectively improving the space utilization rate in the receiving cavity 11. Similarly, by setting a second common magnet 221, both second magnetic components 222 can share the magnetic field around the second common magnet 221 and form two second magnetic gaps 24 with the second common magnet 221, making the structure of the magnetic circuit system 2 more compact and occupying less space, effectively improving the space utilization rate in the receiving cavity 11.

[0046] Please see Figure 3 and Figure 6In some embodiments, each first magnetic component 212 includes a first magnet 2121 and a plurality of first side magnets 2122. The plurality of first side magnets 2122 and a first common magnet 211 are arranged around the periphery of the first magnet 2121 and are all spaced apart from the first magnet 2121 to form a first magnetic gap 23. The first common magnet 211 and the first magnetic components 212 are both magnetized along a first direction. The magnetization direction of the first common magnet 211 is opposite to the magnetization direction of the first magnet 2121 and the same as the magnetization direction of the first side magnets 2122. Each second magnetic component 222 includes... The system includes a second magnet 2221 and a plurality of second side magnets 2222. The plurality of second side magnets 2222 and the second common magnet 221 are arranged around the second magnet 2221 and are spaced apart from the second magnet 2221 to form a second magnetic gap 24. The second common magnet 221 and the second magnetic assembly 222 are both magnetized along a first direction. The magnetization direction of the second common magnet 221 is opposite to the magnetization direction of the second magnet 2221 and the same as the magnetization direction of the second side magnets 2222. The magnetization direction of the second common magnet 221 is opposite to the magnetization direction of the first common magnet 211. In this embodiment, both the first common magnet 211 and the first magnetic assembly 212 are magnetized along the first direction. The magnetization direction of the first common magnet 211 is opposite to that of the first magnet 2121 and the same as that of the first side magnet 2122, so that each first side magnet 2122 can form a closed magnetic circuit with the corresponding first magnet 2121, and the first magnet 2121 can form a closed magnetic circuit with the first common magnet 211, thereby improving the acoustic performance of the sound-generating unit 100; both the second common magnet 221 and the second magnetic assembly 222 are magnetized along the first direction, and the second... The magnetization direction of the common magnet 221 is opposite to that of the second magnet 2221 and the same as that of the second side magnet 2222. This allows each second side magnet 2222 to form a closed magnetic circuit with its corresponding second magnet 2221, and the second magnet 2221 to form a closed magnetic circuit with the second common magnet 221, thus improving the acoustic performance of the sound-generating unit 100. The magnetization direction of the second common magnet 221 is opposite to that of the first common magnet 211, allowing more magnetic field lines to pass through the voice coil 32, thereby improving the acoustic performance of the sound-generating unit 100. Specifically, the N pole of the first common magnet 211 points upward, the N pole of the second common magnet 221 points downward, the N pole of the first magnet 2121 points downward, the N pole of the second magnet 2221 points upward, the N pole of the first side magnet 2122 points upward, and the N pole of the second side magnet 2222 points downward. It should be noted that the number of first-side magnets 2122 and second-side magnets 2222 are the same and they are set in a one-to-one correspondence.

[0047] Please see Figure 4 and Figure 6In some embodiments, two first magnetic components 212 are symmetrically arranged with respect to the first common magnet 211; two second magnetic components 222 are symmetrically arranged with respect to the second common magnet 221. In this embodiment, by symmetrically arranging the two first magnetic components 212 with respect to the first common magnet 211 and the two second magnetic components 222 with respect to the second common magnet 221, the flatness of the sound-generating unit 100BL(x) can be effectively improved, thereby significantly enhancing the acoustic performance of the sound-generating unit 100. Specifically, the two first magnetic components 212 are symmetrically arranged left and right with respect to the first common magnet 211, and the two second magnetic components 222 are symmetrically arranged left and right with respect to the second common magnet 221. It should be noted that BL(x) refers to the function relating the force on the voice coil 32 in the magnetic field to the displacement of the voice coil 32.

[0048] Please see Figure 4 and Figure 6 In some embodiments, the first magnetic circuit 21 and the second magnetic circuit 22 are arranged symmetrically with respect to the center of the housing 1. In this embodiment, the symmetrical arrangement of the first magnetic circuit 21 and the second magnetic circuit 22 with respect to the center of the housing 1 can effectively improve the flatness of the sound-generating unit 100BL(x), significantly improve the FR (Frequency Response) curve, and thus greatly enhance the overall performance and sound effect. Please refer to... Figure 8 , Figure 8 In the figure, L1 represents the frequency response curve of the loudspeaker using the sound-generating unit 100 of this embodiment, while L2 represents the frequency response curve of an existing loudspeaker. It is clear from the figure that the frequency response curve of this embodiment is significantly improved compared to the frequency response curve of an existing loudspeaker. It should be noted that FR refers to the change in output sound pressure level with frequency when the loudspeaker receives signals of different frequencies. Specifically, the first common magnet 211 and the second common magnet 221 are symmetrically arranged vertically relative to the central plane of the housing 1; the first magnet 2121 and the second magnet 2221 are also symmetrically arranged vertically relative to the central plane of the housing 1; the first side magnet 2122 and the corresponding second side magnet 2222 are symmetrically arranged vertically relative to the central plane of the housing 1; wherein, the central plane of the housing 1 passes through the center of the housing 1, and the first direction is perpendicular to the central plane of the housing 1.

[0049] Please see Figure 4 In some embodiments, the diaphragm 31 is located between the first magnetic circuit 21 and the second magnetic circuit 22. The diaphragm 31 includes a diaphragm body 311 and a first reinforcing portion 312 connected to the diaphragm body 311. Each through hole 7 penetrates the diaphragm body 311 and the first reinforcing portion 312. By providing the first reinforcing portion 312, it is helpful to adjust the acoustic performance of the sound-generating unit 100.

[0050] Please see Figure 4In some embodiments, the diaphragm body 311 includes an outer edge portion 3111, a folded ring portion 3112, and a central portion 3113 arranged sequentially from the outside to the inside. The first reinforcing portion 312 is connected to the central portion 3113, and each through hole 7 passes through the central portion 3113 and the first reinforcing portion 312. The outer edge portion 3111 is connected to the housing 1, and the folded ring portion 3112 protrudes towards the second magnetic circuit 22, with its opening facing the first magnetic circuit 21. By providing the folded ring portion 3112, the movement of the diaphragm 31 can be controlled and constrained to a certain extent, reducing the probability of distortion or damage to the diaphragm 31 due to excessive movement. Specifically, the first reinforcing portion 312 is disposed on the side of the central portion 3113 facing away from the first magnetic circuit 21.

[0051] Please see Figure 4 and Figure 5 In some embodiments, the diaphragm 31 further includes a second reinforcing portion 313. The number of voice coils 32 and the number of second reinforcing portions 313 are the same and they are arranged in a one-to-one correspondence. The second reinforcing portions 313 are located in the inner ring of the voice coil 32, and the outer edge of the second reinforcing portion 313 is connected to the inner wall of the voice coil 32. In this embodiment, the outer edge of the second reinforcing portion 313 is connected to the inner wall of the voice coil 32, thereby achieving a reliable connection between the voice coil 32 and the diaphragm 31.

[0052] Please see Figure 4 and Figure 5 In some embodiments, the outer edge of the second reinforcing portion 313 is bent toward the first magnetic circuit 21 to form an adhesive portion 3131, which is bonded to the inner wall of the voice coil 32. By providing the adhesive portion 3131, the contact area between the second reinforcing portion 313 and the voice coil 32 is increased, thereby improving the connection strength between the second reinforcing portion 313 and the voice coil 32.

[0053] Please see Figure 1 , Figure 2 and Figure 4In some embodiments, the housing 1 includes a first housing body 12 and a second housing body 13, with the outer edge of the diaphragm 31 sandwiched between the first housing body 12 and the second housing body 13. The sound-generating unit 100 also includes a first magnetic yoke 41 and a second magnetic yoke 42. The first magnetic yoke 41 is disposed on the side of the first housing body 12 opposite to the second housing body 13, and the first housing body 12 has a first clearance hole 121. A first magnetic circuit 21 is disposed within the first clearance hole 121 and fixed to the first magnetic yoke 41. The second magnetic yoke 42 is disposed on the side of the second housing body 13 opposite to the first housing body 12, and the second housing body 13 has a second clearance hole 131. A second magnetic circuit 22 is disposed within the second clearance hole 131 and fixed to the second magnetic yoke 42. By setting the first magnetic yoke 41 and the second magnetic yoke 42, reliable support is provided for the first magnetic circuit 21 and the second magnetic circuit 22. On the other hand, the magnetic field lines can be effectively guided to converge at the location of the voice coil 32 to form a magnetic circuit, thereby improving the BL value. Specifically, both the first shell body 12 and the second shell body 13 are annular supports.

[0054] Please see Figure 1 , Figure 4 and Figure 6 In some embodiments, the sound-generating unit 100 further includes a first connector 51 and a second connector 52 spaced apart along a second direction on both sides of the housing 1. One end of the first connector 51 is connected to the first magnetic yoke 41, and the other end of the first connector 51 is connected to the second magnetic yoke 42; one end of the second connector 52 is connected to the first magnetic yoke 41, and the other end of the second connector 52 is connected to the second magnetic yoke 42. The connection reliability of the first magnetic yoke 41 and the second magnetic yoke 42 is effectively improved by setting the first connector 51 and the second connector 52. The number of first connectors 51 and the number of second connectors 52 can be multiple, without specific limitation. Setting multiple connectors further enhances the connection reliability of the first magnetic yoke 41 and the second magnetic yoke 42. Specifically, the first connector 51 and the second connector 52 are connecting strips, both of which are metal connectors. The two ends of the first connector 51 are welded to the first magnetic yoke 41 and the second magnetic yoke 42, respectively, and the two ends of the second connector 52 are welded to the first magnetic yoke 41 and the second magnetic yoke 42, respectively.

[0055] Please see Figure 3 , Figure 6 and Figure 7According to one embodiment of this utility model, the sound-generating unit 100 further includes a centering support 6. Each voice coil 32 is provided with at least one centering support 6. The centering support 6 includes a first connecting part 61 connected to the voice coil 32, a second connecting part 62 connected to the housing 1, and a spring arm part 63 connecting the first connecting part 61 and the second connecting part 62. The second side magnet 2222 is provided with a clearance space 22221 corresponding to the spring arm part 63. Specifically, each voice coil 32 is provided with four centering supports 6, and the four centering supports 6 are respectively provided at the corner of the voice coil 32. There are multiple second side magnets 2222, and clearance spaces 22221 are formed between the multiple second side magnets 2222. By providing the centering support 6, the movement direction of the voice coil 32 is restricted, so that it always moves along the first direction, avoiding the phenomenon of tilting or deviating from the track during the vibration of the voice coil 32, thus ensuring the stability of the vibration system 3. It should be noted that the four centering support plates 6 corresponding to each vibration system 3 are welded together through the injection molded pads inside the housing 1 for conductive application.

[0056] This utility model also proposes a sound-generating module (not shown in the figure), which includes a housing and the aforementioned sound-generating unit 100, with the sound-generating unit 100 disposed within the housing. The sound-generating module can be applied to electronic devices such as computers, mobile phones, smart wearable devices, laptops, virtual reality devices, augmented reality devices, mixed reality devices, or extended reality devices. The specific structure of the sound-generating unit 100 is as described in the above embodiments. Since the electronic device adopts all the technical solutions of all the above embodiments, it possesses at least all the beneficial effects brought about by the technical solutions of the above embodiments, which will not be elaborated upon here.

[0057] The above are merely exemplary embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the technical concept of this utility model and the contents of the specification and drawings of this utility model, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A sound-generating monomer, characterized in that, include: A housing, the interior of which forms a receiving cavity; A magnetic circuit system is located within the receiving cavity. The magnetic circuit system includes a first magnetic circuit and a second magnetic circuit spaced apart along a first direction. The first magnetic circuit has at least two first magnetic gaps arranged along a second direction, and the second magnetic circuit has at least two second magnetic gaps arranged along the second direction. The number of first magnetic gaps and second magnetic gaps are equal and they are arranged in a one-to-one correspondence. The first direction and the second direction are perpendicular to each other. A vibration system includes a diaphragm and at least two voice coils, each first magnetic gap corresponding to one voice coil, the diaphragm having at least two through holes, each voice coil corresponding to one through hole, the through holes surrounding the periphery of the voice coils, the voice coils being connected to the diaphragm, and the voice coils driving the diaphragm to vibrate along a first direction; each voice coil includes a first body and a second body disposed opposite to each other along the first direction, the first body corresponding to the first magnetic gap, and the second body corresponding to the second magnetic gap.

2. The sound-generating unit as described in claim 1, characterized in that, The first magnetic circuit includes a first common magnet and two first magnetic components. The two first magnetic components are spaced apart on both sides of the first common magnet along the second direction to form two first magnetic gaps. The second magnetic circuit includes a second common magnet and two second magnetic components. The two second magnetic components are spaced apart on both sides of the second common magnet along the second direction to form two second magnetic gaps.

3. The sound-generating unit as described in claim 2, characterized in that, Each of the first magnetic components includes a first magnet and a plurality of first side magnets. The plurality of first side magnets and the first common magnet are arranged in a ring around the periphery of the first magnet and are all spaced apart from the first magnet to form the first magnetic gap. The first common magnet and the first magnetic components are both magnetized along the first direction. The magnetization direction of the first common magnet is opposite to the magnetization direction of the first magnet and the same as the magnetization direction of the first side magnet. Each of the second magnetic components includes a second magnet and a plurality of second side magnets. The plurality of second side magnets and the second common magnet are arranged in a ring around the periphery of the second magnet and are all spaced apart from the second magnet to form the second magnetic gap. The second common magnet and the second magnetic components are both magnetized along the first direction. The magnetization direction of the second common magnet is opposite to the magnetization direction of the second magnet and the same as the magnetization direction of the second side magnets. The magnetization direction of the second common magnet is opposite to the magnetization direction of the first common magnet.

4. The sound-generating unit as described in claim 2, characterized in that, Two first magnetic components are symmetrically arranged with respect to the first common magnet; two second magnetic components are symmetrically arranged with respect to the second common magnet. And / or, the first magnetic circuit and the second magnetic circuit are arranged symmetrically with respect to the center of the housing.

5. The sound-generating unit as described in claim 1, characterized in that, The diaphragm is located between the first magnetic circuit and the second magnetic circuit. The diaphragm includes a diaphragm body and a first reinforcing portion connected to the diaphragm body. Each of the through holes passes through the diaphragm body and the first reinforcing portion. The diaphragm body includes an outer edge portion, a folded ring portion, and a central portion arranged sequentially from the outside to the inside. The first reinforcing portion is connected to the central portion, and each of the through holes passes through the central portion and the first reinforcing portion. The outer edge portion is connected to the housing. The folded ring portion protrudes towards the second magnetic circuit, and the opening of the folded ring portion faces the first magnetic circuit.

6. The sound-generating unit as described in claim 5, characterized in that, The diaphragm further includes a second reinforcing part. The number of voice coils and the number of second reinforcing parts are the same and they are arranged in a one-to-one correspondence. The second reinforcing part is located in the inner ring of the voice coil, and the outer edge of the second reinforcing part is connected to the inner wall of the voice coil.

7. The sound-generating unit as described in claim 6, characterized in that, The outer edge of the second reinforcing part is bent toward the direction of the first magnetic circuit to form an adhesive part, which is bonded to the inner wall of the voice coil.

8. The sound-generating unit as described in any one of claims 1 to 7, characterized in that, The housing includes a first housing body and a second housing body, with the outer edge of the diaphragm sandwiched between the first housing body and the second housing body; the sound-generating unit also includes a first magnetic yoke and a second magnetic yoke, the first magnetic yoke being disposed on the side of the first housing body away from the second housing body, the first housing body having a first clearance hole, the first magnetic circuit being disposed in the first clearance hole and fixed to the first magnetic yoke, the second magnetic yoke being disposed on the side of the second housing body away from the first housing body, the second housing body having a second clearance hole, the second magnetic circuit being disposed in the second clearance hole and fixed to the second magnetic yoke.

9. The sound-generating unit as described in claim 8, characterized in that, The sound-generating unit further includes a first connector and a second connector spaced apart on both sides of the housing along the second direction. One end of the first connector is connected to the first magnetic yoke, and the other end of the first connector is connected to the second magnetic yoke. One end of the second connector is connected to the first magnetic yoke, and the other end of the second connector is connected to the second magnetic yoke.

10. A sound-generating module, characterized in that, The sound-generating module includes a housing and a sound-generating unit as described in any one of claims 1 to 9, wherein the sound-generating unit is disposed within the housing.

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