Sound production monomer and electronic equipment

Abstract

The utility model provides a sounding monomer and an electronic device. The sounding monomer comprises a support, a magnetic circuit system and a vibration system. The magnetic circuit system comprises a central magnetic circuit, an edge magnetic circuit and a connecting piece, a first magnetic gap and a second magnetic gap are respectively formed among the edge magnetic circuit, the central magnetic circuit and the connecting piece, a first through hole is formed in the connecting piece, and an airflow channel communicated with the first through hole is formed between the central magnetic circuit and the connecting piece; the vibration system comprises a first vibrating diaphragm and a second vibrating diaphragm; the first vibrating diaphragm comprises a first folding ring, a second folding ring and a vibrating part, the vibrating part is connected to the first voice coil, the first folding ring is connected to the connecting piece and is provided with a second through hole communicated with the first through hole, and sound waves of the second vibrating diaphragm radiate outwards through the first through hole and the second through hole; and sound waves of the first vibrating diaphragm and the second vibrating diaphragm are radiated outwards on the same side of the sound production monomer. According to the utility model, the problem that the vibration area and the vibration displacement of the existing sounding monomer cannot meet the requirements of wearable audio products such as OWS earphones can be solved.

Description

TECHNICAL FIELD

[0001] The utility model relates to sound production technical field, more specifically, relate to a sound production monomer and electronic equipment. BACKGROUND

[0002] In recent years along with the development of intelligent wearing electronic product, the performance requirement of intelligent wearing product to monomer is higher and higher, especially the requirement of OWS (Open Wearable Stereo, full open wearable earphone) bluetooth earphone is different from TWS (True Wireless Stereo, true wireless stereo), because the whole machine is convenient and comfortable to wear, so the non-ear mode is adopted, thereby the performance improvement of sound production monomer is imminent.

[0003] The traditional driver design is all single-sided vibration sound production, in the cavity of the whole machine with limited internal space, it is difficult to increase the vibration area and vibration displacement, therefore the performance improvement space of sound production monomer is also limited, and it can not meet the demand of existing OWS and other wearable audio products. UTILITY MODEL CONTENT

[0004] In view of the above problem, the utility model aims at providing a sound production monomer and electronic equipment to solve the problem that the vibration area and vibration displacement of the existing sound production monomer can not meet the demand of OWS earphone and other wearable audio products.

[0005] The utility model provides a sound production monomer, which comprises a support and a magnetic circuit system connected with the support, the magnetic circuit system comprising a center magnetic circuit, a side magnetic circuit arranged around the center magnetic circuit, and a connecting piece for connecting the center magnetic circuit and the side magnetic circuit, wherein a first magnetic gap is formed between the side magnetic circuit and the connecting piece, a second magnetic gap is formed between the center magnetic circuit and the connecting piece, a first through hole is arranged on the connecting piece, an airflow channel is formed between the center magnetic circuit and the connecting piece, and the airflow channel is located on the outside of the center magnetic circuit and is connected with the second magnetic gap and the first through hole on both sides.

[0006] The utility model further comprises a vibration system, which comprises a first diaphragm and a second diaphragm connected to both sides of the support, a first voice coil connected to the first diaphragm, and a second voice coil connected to the second diaphragm, wherein the first voice coil is located in the first magnetic gap, and the second voice coil is located in the second magnetic gap.

[0007] The first diaphragm comprises a first folded ring, a second folded ring located on the outside of the first folded ring, and a vibration part located between the first folded ring and the second folded ring, the vibration part is connected to the first voice coil, the first folded ring is connected to the connecting piece and has a second through hole connected with the first through hole, the sound waves of the second diaphragm are radiated outward through the first through hole and the second through hole, and the sound waves of the first diaphragm and the second diaphragm are radiated outward on the same side of the sound production monomer.

[0008] Preferably, the first diaphragm and the second diaphragm vibrate in the same direction and radiate sound waves of the same phase outward.

[0009] Preferably, the connecting piece comprises a top plate, a bottom plate, and a connecting portion for connecting the top plate and the bottom plate, wherein the center magnetic circuit is arranged on the top plate, the edge magnetic circuit is arranged on the bottom plate, the first through hole is arranged through the top plate, and the top plate is connected with the first folded ring.

[0010] Preferably, the top plate, the bottom plate, and the connecting portion are all made of magnetic conductive material; or,

[0011] The top plate and the bottom plate are made of magnetic conductive material, and the connecting portion is a permanent magnet.

[0012] Preferably, the number of the first through holes is at least two, and the first through holes are arranged at intervals.

[0013] Preferably, the top plate comprises a first fixed plate connected with the center magnetic circuit, a second fixed plate connected with the connecting portion, and a connecting plate for connecting the first fixed plate and the second fixed plate, wherein,

[0014] The first fixed plate and the second fixed plate are located in different planes, the first through hole is arranged on the first fixed plate, the center magnetic circuit is connected with the first fixed plate, and the center magnetic circuit is arranged at intervals with the connecting plate and the second fixed plate, so as to form an air flow channel between the center magnetic circuit and the connecting piece.

[0015] Preferably, the bottom plate is provided with a recess, and the recess provides a space for the first voice coil; or,

[0016] The center magnetic circuit has a center portion connected with the first fixed plate and an outer peripheral portion located outside the center portion, the center portion is arranged at intervals with the connecting plate, and the top surface of the outer peripheral portion is lower than the bottom surface of the second fixed plate.

[0017] Preferably, the center magnetic circuit comprises a center magnetic conductive plate and a center magnetic group arranged on the center magnetic conductive plate, the edge magnetic circuit comprises an edge magnetic iron and an edge magnetic conductive plate, the second magnetic gap is formed between the center magnetic conductive plate and the bottom plate, and the first magnetic gap is formed between the edge magnetic conductive plate and the top plate.

[0018] Preferably, the center magnetic group comprises a first center magnetic iron and a center annular magnetic iron surrounding the first center magnetic iron, the top of the first center magnetic iron is connected with the top plate, the bottom of the first center magnetic iron is connected with the center magnetic conductive plate, and the height of the center annular magnetic iron is lower than the height of the first center magnetic iron; or,

[0019] The center magnetic group comprises a first center magnetic iron arranged on the center magnetic conductive plate and a second center magnetic iron arranged on the first center magnetic iron, the top of the second center magnetic iron is connected with the top plate, and the width of the first center magnetic iron is greater than the width of the second center magnetic iron.

[0020] Preferably, a first cavity is formed between the first diaphragm, the support and the connecting piece, the first cavity is a closed cavity, a first leakage hole is arranged on the sound production unit and is connected with the outside, and a damping piece is arranged on the first leakage hole.

[0021] Preferably, the second diaphragm comprises a third folded ring and a reinforcing part, the third folded ring is arranged around the reinforcing part, and an outer edge of the third folded ring is connected with the support.

[0022] Preferably, the sound production unit further comprises a back cover, the back cover is arranged on a side of the second diaphragm away from the first diaphragm, a second cavity is formed between the second diaphragm and the back cover, a second leakage hole is arranged on the back cover and is connected with the outside, and / or,

[0023] The sound production unit further comprises two positioning rings, the positioning rings are arranged between the outer edges of the second folded ring and the third folded ring and the support, respectively.

[0024] The application further provides an electronic device, which comprises a shell with a receiving cavity and a sound production unit arranged in the receiving cavity, the sound production unit is the sound production unit described above, wherein,

[0025] The sound production unit divides the receiving cavity into a front cavity and a rear cavity which are isolated from each other, the shell is provided with a sound outlet hole connected with the front cavity, and sound waves of the first diaphragm and the second diaphragm of the sound production unit are radiated to the outside through the sound outlet hole.

[0026] Preferably, the shell is provided with a third leakage hole connected with the rear cavity.

[0027] As can be seen from the above technical solutions, the sound production unit and the electronic device provided by the application drive two diaphragms to vibrate and produce sound through one magnetic circuit system, the first through hole is arranged on the magnetic circuit system, the second through hole is arranged on the first diaphragm and is connected with the first through hole, the first through hole and the second through hole serve as a sound outlet hole for sound waves radiated by the second diaphragm, the sound waves of the first diaphragm and the second diaphragm are radiated to the outside on the same side of the sound production unit, thereby realizing the same-direction sound production of the double-sided diaphragm without increasing the size of the appearance, and the vibration area of the vibration system is increased, thereby achieving the purpose of performance improvement; and the airflow channel is formed between the central magnetic group and the connecting piece, the two sides of the airflow channel are connected with the second magnetic gap and the first sound outlet hole, respectively, which is beneficial to the smooth airflow circulation below the second diaphragm and improves the high-frequency performance of the second diaphragm, thereby improving the high-frequency performance of the first diaphragm and the second diaphragm after superposition.

[0028] To the accomplishment of the foregoing and related ends, one or more aspects of the application comprise the features hereinafter fully described and illustrated in the accompanying drawings. These aspects are indicative of but a few of the various ways of utilizing the principles of the application. Other aspects will become apparent from the following description, which is illustrative of the principles of the application. The description and drawings merely exemplify the application. Variations in the application can be understood and effected by those of ordinary skill in the art from the drawings, the disclosure, and the detailed description below. BRIEF DESCRIPTION OF DRAWINGS

[0029] Other objects and results of the application will become more fully apparent from the following description, taken in conjunction with the accompanying drawings, wherein:

[0030] Figure 1 It is an explosion structure schematic diagram of the sound emitting monomer according to the embodiment one of the application;

[0031] Figure 2 It is a sectional view of the sound emitting monomer according to the embodiment one of the application;

[0032] Figure 3 It is a sectional view of the sound emitting monomer according to the embodiment one of the application;

[0033] Figure 4 It is an explosion structure schematic diagram of the sound emitting monomer according to the embodiment two of the application;

[0034] Figure 5 It is a sectional view of the sound emitting monomer according to the embodiment two of the application;

[0035] Figure 6 It is a sectional view of the sound emitting monomer according to the embodiment two of the application;

[0036] Figure 7 It is a three-dimensional structure schematic diagram of the electronic equipment according to the embodiment of the application;

[0037] Figure 8 It is a three-dimensional structure schematic diagram of the sound emitting monomer according to the embodiment of the application.

[0038] The reference signs in the drawings include: 1, first diaphragm, 11, first folding ring, 12, second folding ring, 13, vibration part;

[0039] 2, second diaphragm, 21, third folding ring, 22, reinforcing part;

[0040] 3, first voice coil, 4, second voice coil;

[0041] 5. A magnetic circuit system, 51, an edge magnetic plate, 52, a center magnetic group, 521, a first center magnet, 522, a center ring magnet, 523, a second center magnet, 53, a center magnetic plate, 54, an edge magnet, 55, a connecting piece, 551, a top plate, 552, a connecting part, 553, a bottom plate, 5511, a first through hole, 5512, a dustproof net, 5513, an air flow channel, 5514, a first fixing plate, 5515, a connecting plate, 5516, a second fixing plate, 5531, a groove;

[0042] 6. A bracket, 61, a first bracket, 62, a second bracket, 63, a first leakage hole, 64, a damping piece;

[0043] 71, a first positioning ring, 72, a second positioning ring;

[0044] 8. A back cover, 81, a second leakage hole;

[0045] 91, an upper shell, 92, a lower shell, 911, a sound outlet, 921, a third leakage hole;

[0046] 10, a first magnetic gap, 20, a second magnetic gap.

[0047] The same reference numbers in all the figures indicate similar or corresponding features or functions. DETAILED DESCRIPTION

[0048] In the following description, for the purposes of explanation, numerous specific details are set forth in order to provide a thorough understanding of one or more embodiments. It is apparent, however, that the embodiments can be practiced without these specific details. In other instances, well-known structures and devices are shown in block diagram form in order to facilitate describing one or more embodiments.

[0049] In the description of the present application, it is to be understood that the terms "center", "longitudinal", "lateral", "length", "width", "thickness", "upper", "lower", "front", "rear", "left", "right", "vertical", "horizontal", "top", "bottom", "inner", "outer", "clockwise", "counterclockwise", "axial", "radial", "circumferential" and the like indicate the orientation or positional relationship based on the orientation or positional relationship shown in the drawings, and are only for the convenience of describing the present application and simplifying the description, and therefore cannot be understood as indicating or implying that the devices or elements referred to must have a particular orientation, be constructed and operated in a particular orientation, and therefore cannot be understood as limiting the present application.

[0050] In view of the foregoing, the present application proposes a sound emitting unit and electronic equipment to solve the problem that the vibration area and vibration displacement of the existing sound emitting unit cannot meet the demand of OWS earphones and other wearable audio products.

[0051] The specific embodiments of the utility model will be described in detail below with reference to the drawings.

[0052] In order to illustrate the structure of the sound emitting monomer provided by the utility model, Figures 1 to 6 、 Figure 8 The structure of the sound emitting monomer is exemplarily indicated from different angles. Specifically, Figure 1 The exploded structure of the sound emitting monomer according to the first embodiment of the utility model is shown. Figure 2 The cross-sectional structure of the sound emitting monomer according to the first embodiment of the utility model is shown. Figure 3 The cross-sectional structure of the sound emitting monomer according to the first embodiment of the utility model is shown. Figure 4 The exploded structure of the sound emitting monomer according to the second embodiment of the utility model is shown. Figure 5 The cross-sectional structure of the sound emitting monomer according to the second embodiment of the utility model is shown. Figure 6 The cross-sectional structure of the sound emitting monomer according to the second embodiment of the utility model is shown. Figure 8 The three-dimensional structure of the sound emitting monomer according to the utility model is shown.

[0053] As Figures 1 to 6 、 Figure 8 Commonly shown, the sound emitting monomer provided by the utility model includes support 6, magnetic circuit system 5 and vibration system, magnetic circuit system 5 is connected with support 6, including center magnetic circuit, the edge magnetic circuit that is arranged around center magnetic circuit and the connecting piece 55 for connecting center magnetic circuit and edge magnetic circuit, wherein, the first magnetic gap 10 is formed between edge magnetic circuit and connecting piece 55, the second magnetic gap 20 is formed between center magnetic circuit and connecting piece 55, the first through hole 5511 is provided on connecting piece 55, the airflow passage 5513 is formed between center magnetic circuit and connecting piece 55, the airflow passage 5513 is located at the outside of center magnetic circuit and the two sides are communicated with second magnetic gap 20 and first through hole 5511 respectively;Vibration system is connected with support 6, including the first diaphragm 1 and second diaphragm 2 that are connected with the two sides of support 6, the first voice coil 3 that is connected with first diaphragm 1, the second voice coil 4 that is connected with second diaphragm 2, the first voice coil 3 is located in first magnetic gap 10, and the second voice coil 4 is located in second magnetic gap 20;Wherein, the first diaphragm 1 includes first folding ring 11, second folding ring 12 located at the outside of first folding ring 11 and vibration part 13 arranged between first folding ring 11 and second folding ring 12, vibration part 12 is connected with first voice coil 3, first folding ring 11 is connected to connecting piece 55 and is provided with second through hole communicated with first through hole 5511, and the sound wave of second diaphragm 2 is radiated outward through first through hole 5511 and second through hole, and the sound wave of first diaphragm 1 and second diaphragm 2 is radiated outward on the same side of sound emitting monomer.

[0054] The sound production unit provided in the application is driven by a magnetic circuit system 5 to drive two voice coils to drive two diaphragms to vibrate and produce sound, and the magnetic circuit system 5 is provided with a first through hole 5511, the first diaphragm 1 is provided with a second through hole in communication, the first through hole 5511 and the second through hole serve as sound holes for sound waves radiated by the second diaphragm 2, so that the sound waves of the two diaphragms are radiated outward on the same side of the sound production unit, thereby realizing the effect of double diaphragm sound production in the same direction without increasing the size of the sound production unit, which is beneficial to and increases the vibration area of the vibration system, thereby achieving the purpose of performance improvement; and the airflow channel 5513 is arranged between the center magnetic circuit and the connecting piece 55, that is, the airflow channel surrounds the center magnetic circuit, and the two sides of the airflow channel 5513 are connected with the second magnetic gap 20 and the first through hole, respectively, which is beneficial to the smooth flow of airflow below the second diaphragm 2 and improves the high-frequency performance of the second diaphragm 2, thereby improving the high-frequency performance of the first diaphragm 1 and the second diaphragm 2 after superposition.

[0055] The first diaphragm 1 and the second diaphragm 2 vibrate in the same direction and radiate sound waves of the same phase outward, so that the volume of the sound production unit can be improved.

[0056] Optionally, the support 6 is in a cylindrical shape, and the outer peripheries of the first diaphragm 1 and the second diaphragm 2 are substantially flush, which is beneficial to the regular design of the shape of the sound production unit and further facilitates the assembly of the sound production unit in the whole machine and simplifies the reserved structure of the whole machine. Further optionally, the support 6 comprises a first support in a cylindrical shape and a second support in a cylindrical shape, and the first support and the second support are adaptively connected to form a cylindrical support; the support 6 is divided into a first support 61 and a second support 62, the first diaphragm 1 can be assembled through the first support 61, and the second diaphragm 2 can be assembled through the second support 62, which is beneficial to the assembly of the sound production unit during the assembly process, and conductive terminals can also be arranged on the first support and the second support, respectively, so as to facilitate the electrical connection between the first voice coil and the second voice coil and the external circuit. The first support 61 and the second support 62 are provided with a first leakage hole 63, and the first leakage hole 63 is provided with a damping piece 64, so that the airflow velocity in the cavity of the sound production unit can be further adjusted, the acoustic resistance can be adjusted, and the performance of the sound production unit can be improved.

[0057] In the embodiment of the application, the magnetic circuit system 5 comprises a connecting piece 55, a center magnetic circuit arranged on the connecting piece 55 and an edge magnetic circuit arranged around the center magnetic circuit, and the connecting piece 55 is used for connecting the center magnetic circuit and the edge magnetic circuit, wherein the connecting piece 55 comprises a top plate 551, a bottom plate 553 and a connecting part 552 used for connecting the top plate 551 and the bottom plate 553, the center magnetic circuit is arranged on the top plate 551, the edge magnetic circuit is arranged on the bottom plate 553, the first through hole 5511 is arranged on the top plate 551 in a penetrating manner, and the top plate 551 is connected with the first folded ring 11.

[0058] The first through hole 5511 is at least two in number, and in a specific application, different numbers of first through holes are set according to needs, and each first through hole is arranged at intervals.

[0059] Further, a dust screen 5512 is arranged on the second through hole, so as to prevent external dust or impurities from entering the inside of the sound production unit, thereby avoiding affecting the acoustic performance of the sound production unit.

[0060] The airflow channel 5513 is in communication with the second magnetic gap 20 and the first through hole 5511 on both sides, that is, the airflow channel 5513 is in direct communication with the second magnetic gap 20 around the center magnetic circuit, which is conducive to the smoothness of the airflow below the second diaphragm 2, improves the high-frequency performance of the second diaphragm 2, and further improves the high-frequency performance of the first diaphragm 1 and the second diaphragm 2 after superposition.

[0061] In one specific embodiment of the present application, the top plate 551 and the bottom plate 553 of the connecting piece 55 and the connecting portion 552 are all magnetically conductive materials, that is, the connecting piece 55 is a magnetic conductive piece, and the top plate 551, the connecting portion 552 and the bottom plate 553 are designed as a whole, which is convenient for processing and manufacturing; or in another specific embodiment of the present application, the top plate 551 and the bottom plate 553 of the connecting piece 55 are magnetically conductive materials, and the connecting portion 552 is a permanent magnet, which further improves the magnetic field strength in the first magnetic gap 10 and the second magnetic gap 20, and improves the magnetic circuit performance of the sound production unit. At this time, the top plate 551, the connecting portion 552 and the bottom plate 553 are designed as a whole.

[0062] In the first embodiment ( Figure 1 , Figure 2 , Figure 3 ) the connecting piece 55 is a one-piece design structure, and the top plate 551 is connected to the inner edge of the first folded ring 11; in the second embodiment ( Figure 4 and Figure 5 , Figure 6 ) the connecting piece 55 is a split design, and the connecting portion 552 is a ring magnet. In a specific application, the appropriate connecting piece can be selected according to the actual situation.

[0063] In the above embodiments, the top plate 551 comprises a first fixed plate 5514, a second fixed plate 5516, and a connecting plate 5515 connecting the two, the first fixed plate 5514 and the second fixed plate 5516 are located in different planes, the first through hole is arranged on the first fixed plate 5514, the top end of the center magnetic circuit is fixed on the first fixed plate 5514, the center magnetic circuit is spaced from the connecting plate 5515 and the second fixed plate 5516, so that the air flow channel 5513 is formed between the center magnetic circuit and the connecting piece 55. In this way, the air flow channel 5513 surrounds the center magnetic circuit, and the two sides of the air flow channel 5513 are directly communicated with the second magnetic gap 20 and the first through hole 5511, which is beneficial to the smoothness of the air flow below the second diaphragm 2, improves the high frequency performance of the second diaphragm 2, and further improves the high frequency performance of the first diaphragm 1 and the second diaphragm 2 after superposition.

[0064] Among them, the first fixed plate 5514 and the second fixed plate 5516 are located in different planes and form a stepped structure, which provides a space for the first diaphragm 1 to avoid.

[0065] Optionally, the bottom plate 553 is provided with an avoidance groove 5531, which provides an avoidance space for the first voice coil 3, thereby improving the performance of the sound emitting unit.

[0066] More specifically, the center magnetic circuit has a center part connected with the first fixed plate 5514 and an outer peripheral part located outside the center part, the center part is spaced from the connecting plate 5515, and the top surface of the outer peripheral part is lower than the bottom surface of the second fixed plate 5516. In this way, the outer peripheral part can be further close to the bottom plate 553, reducing the distance between the outer peripheral part and the bottom plate 553, improving the magnetic flux passing through the second voice coil 4, and improving the vibration performance of the second voice coil 4.

[0067] In the above embodiments, preferably, the area of the first through hole 5511 accounts for 40%-85% of the area of the first fixed plate 5514, and specifically can be 40%, 50%, 60%, 70%, 80%, 85%, etc. If the area of the first through hole 5511 is too small, it is not conducive to the radiation of sound waves of the second diaphragm 2 to the outside, and if the area of the first through hole 5511 is too large, the bonding area of the center magnetic circuit and the first fixed plate 5514 is too small, which is not conducive to improving the connection reliability of the two.

[0068] In the embodiment of the utility model, first diaphragm 1, support 6, connecting piece 55 form first cavity between, first cavity is airtight cavity, be provided with the first leak hole 63 of the communication first cavity and outside on sounding monomer. First leak hole 63 can balance the air pressure of first cavity, promote the vibration balance of first diaphragm 1. Preferably, first leak hole 63 is multiple, multiple first leak hole 63 is along the circumferential symmetry of sounding monomer Setting. Preferably, first leak hole 63 is equipped with damping piece, can further adjust the airflow velocity of first cavity, adjust the acoustic resistance of first cavity.

[0069] Optionally, the center magnetic circuit includes a center magnetic plate 53 and a center magnetic group 52 disposed on the center magnetic plate 53, and the edge magnetic circuit includes an edge magnetic plate 51 and an edge magnetic plate 51. The second magnetic gap 20 is formed between the center magnetic plate 53 and the bottom plate 553, and the first magnetic gap 10 is formed between the edge magnetic plate 51 and the top plate 551. Specifically, the first magnetic gap 10 is formed between the edge magnetic plate 51 and the second fixed plate 5516.

[0070] In the embodiment of the utility model, the center magnetic group 52 has two different structures, as shown in Figure 8 、 Figure 1 、 Figure 2 and Figure 3 , the center magnetic group 52 includes a first center magnet 521 and a center annular magnet 522 surrounding the first center magnet; wherein the top of the first center magnet 521 is connected with the top plate 551, the bottom of the first center magnet 521 is connected with the center magnetic plate 53, the bottom of the center annular magnet 522 is connected with the center magnetic plate 53, and the height of the center annular magnet 522 is lower than the height of the first center magnet 521. Wherein, the magnetization direction of the center magnetic group 52 is parallel to the vibration direction of the vibration system, and the magnetization direction of the first center magnet 521 and the center annular magnet 522 is the same. At this time, the first center magnet 521 forms the center part of the center magnetic group 52, and the center annular magnet 522 forms the outer peripheral part of the center magnetic group 52, that is, the top surface of the center annular magnet 522 is lower than the bottom surface of the second fixed plate 5516.

[0071] As shown in Figure 4 、 Figure 5As shown, the center magnetic group 52 comprises a first center magnet 521 arranged on a center magnetic conducting plate 53 and a second center magnet 523 arranged on the first center magnet 521; wherein the top of the second center magnet 523 is connected with a top plate 551, the first center magnet 521 is arranged in alignment with the center magnetic conducting plate 53, and the width of the first center magnet 521 is greater than the width of the second center magnet 523. At this time, the part of the first center magnet 521 which is wider than the second center magnet 523 forms the outer peripheral part of the center magnetic group 52, and the part of the first center magnet 521 which is connected with the second center magnet 523 and the second center magnet 523 form the central part of the center magnetic group 52, that is, the top surface of the part of the first center magnet 521 which is wider than the second center magnet 523 is lower than the bottom surface of the second fixed plate 5516. Of course, in other embodiments, the center magnetic group 52 can also be an integrally formed magnet, which is not limited herein. In applications, according to actual needs, the specific structure design of the center magnetic group 52 is selected.

[0072] Wherein, the edge magnetic conducting plate 51 is injection molded on the bracket, and the first leakage hole 63 is formed by removing material from the edge magnetic conducting plate 51 and the corresponding bracket area. In the embodiment of the utility model, by removing material from the edge magnetic conducting plate 51 and the bracket to form the first leakage hole 63, the first leakage hole 63 does not additionally occupy the radial dimension of the sound emitting element, so as to maximize the radial dimension of the sound emitting element, or the size of the leakage hole can be increased under the limited size of the sound emitting element to balance the internal pressure.

[0073] Wherein, the second diaphragm 2 comprises a third folded ring 21 and a reinforcing part 22, and the third folded ring 21 is arranged around the reinforcing part 22. The sound emitting element further comprises a back cover 8, the back cover 8 is located on the side of the second diaphragm 2 away from the first diaphragm 1, a second cavity is formed between the second diaphragm 2 and the back cover 8, and a second leakage hole 81 is arranged on the back cover 8 and communicates with the second cavity and the outside. The second leakage hole 81 can balance the air pressure of the second cavity and improve the vibration balance of the second diaphragm 2. Wherein, the back cover is made of metal material, which can support the sound emitting element during assembly and reduce the occupation of the overall size. In specific applications, a proper number of leakage holes are set according to actual conditions, and are not limited to a fixed number. Preferably, a damping member is arranged on the second leakage hole 81, which can further adjust the airflow velocity of the second cavity and adjust the acoustic resistance of the second cavity.

[0074] In addition, in the embodiment of the utility model, a first positioning ring 71 is arranged between the outer edge of the second folded ring 12 and the first bracket 61, and a second positioning ring 72 is arranged between the third folded ring 22 and the second bracket 62. Specifically, the positioning ring can be a steel ring, and the folded ring and the bracket are connected by the positioning ring, so that the first diaphragm 1 or the second diaphragm 2 is convenient to take during assembly, and the assembly precision and the performance of the sound emitting element are improved.

[0075] The utility model also provides an electronic device, including with the shell of containing cavity and set up in the sound production monomer of containing cavity, the structure of sound production monomer is as described above. Among them, sound production monomer divides the containing cavity into the front cavity and rear cavity of mutual isolation, the shell is provided with with the sound hole of front cavity intercommunication, and the sound wave of first diaphragm and second diaphragm of sound production monomer radiates to the outside through the sound hole. Optionally, the third leak hole is also provided on the shell, and the third leak hole is communicated with the rear cavity.

[0076] Specifically, the shell includes an upper shell 91 and a lower shell 92, and the sound production monomer is arranged in the shell. Figure 6 Figure 8 Figure 1 Figure 2 Figure 4 Figure 5 Figure 3 Figure 6 Figure 7 In the embodiment shown, the upper shell 91 of the shell is provided with a sound hole 911 that is in communication with the front cavity, and the sound waves of the first diaphragm 1 and the second diaphragm 2 radiate to the outside through the sound hole 911. The lower shell 92 of the shell is provided with a third leak hole 921 that is in communication with the rear cavity, for adjusting the pressure in the rear cavity and further adjusting the air pressure of the first cavity and the second cavity. Optionally, the third leak hole 921 is provided with a damping member for adjusting the acoustic resistance.

[0077] In the embodiment of the utility model, the shell of the electronic device can have a square structure, and in specific applications, other suitable shapes such as a circular shape can be selected according to actual conditions, and is not limited to a specific shape.

[0078] The specific structure of the sound production monomer refers to the above-mentioned embodiments. Since the electronic device adopts all the technical solutions of the above-mentioned embodiments, it has all the beneficial effects brought by the technical solutions of the above-mentioned embodiments, which will not be repeated here.

[0079] The sound production monomer and the electronic device according to the utility model are described above with reference to the drawings in an exemplary manner. However, those skilled in the art should understand that various improvements can be made to the sound production monomer and the electronic device according to the utility model without departing from the content of the utility model. Therefore, the protection scope of the utility model should be determined by the content of the appended claims.

Claims

1. A sound producing monomer, characterized in that, The sound emitting monomer comprises a support, a magnetic circuit system connected to the support, a center magnetic circuit, a side magnetic circuit arranged around the center magnetic circuit, and a connecting piece for connecting the center magnetic circuit and the side magnetic circuit, wherein a first magnetic gap is formed between the side magnetic circuit and the connecting piece, a second magnetic gap is formed between the center magnetic circuit and the connecting piece, a first through hole is arranged on the connecting piece, an air flow channel is formed between the center magnetic circuit and the connecting piece, and the air flow channel is located outside the center magnetic circuit and communicates with the second magnetic gap and the first through hole respectively. The vibration system comprises a first diaphragm and a second diaphragm connected to the support, a first voice coil connected to the first diaphragm, and a second voice coil connected to the second diaphragm, wherein the first voice coil is located in the first magnetic gap, and the second voice coil is located in the second magnetic gap. The first diaphragm comprises a first folded ring, a second folded ring located outside the first folded ring, and a vibration part located between the first folded ring and the second folded ring, the vibration part is connected to the first voice coil, the first folded ring is connected to the connecting piece and has a second through hole communicating with the first through hole, the sound waves of the second diaphragm are radiated outward through the first through hole and the second through hole, and the sound waves of the first diaphragm and the second diaphragm are radiated outward on the same side of the sound emitting monomer.

2. The sound emitting monomer of claim 1, wherein the first diaphragm and the second diaphragm vibrate in the same direction and radiate sound waves of the same phase outward.

3. The sound emitting monomer of claim 1, wherein the connecting piece comprises a top plate, a bottom plate, and a connecting part for connecting the top plate and the bottom plate, wherein the center magnetic circuit is arranged on the top plate, the side magnetic circuit is arranged on the bottom plate, the first through hole is arranged through the top plate, and the top plate is connected to the first folded ring.

4. The sound emitting monomer of claim 3, wherein the top plate, the bottom plate, and the connecting part are all made of magnetic conductive material; or the top plate and the bottom plate are made of magnetic conductive material, and the connecting part is a permanent magnet.

5. The sound emitting monomer of claim 3, wherein the number of the first through holes is at least two, and the first through holes are arranged at intervals.

6. The sound emitting monomer of claim 3, wherein the top plate comprises a first fixed plate connected to the center magnetic circuit, a second fixed plate connected to the connecting part, and a connecting plate for connecting the first fixed plate and the second fixed plate, wherein the first fixed plate and the second fixed plate are located in different planes, the first through hole is arranged in the first fixed plate, the center magnetic circuit is connected to the first fixed plate, and the center magnetic circuit is arranged at intervals with the connecting plate and the second fixed plate, so that the air flow channel is formed between the center magnetic circuit and the connecting piece.

7. The sound emitting monomer of claim 6, wherein an avoiding groove is arranged on the bottom plate, and the avoiding groove provides an avoiding space for the first voice coil; or ​ ​ ​ ​ ​ ​ ​ ​ ​ The center magnetic circuit has a center portion connected with the first fixed plate and a peripheral portion located outside the center portion, the center portion is spaced apart from the connecting plate, and the top surface of the peripheral portion is lower than the bottom surface of the second fixed plate.

8. The sound production unit according to claim 3, wherein The center magnetic circuit comprises a center magnetic conducting plate and a center magnetic group arranged on the center magnetic conducting plate, the side magnetic circuit comprises a side magnetic iron and a side magnetic conducting plate, the second magnetic gap is formed between the center magnetic conducting plate and the bottom plate, and the first magnetic gap is formed between the side magnetic conducting plate and the top plate.

9. The sound production unit according to claim 8, wherein The center magnetic group comprises a first center magnetic iron and a center annular magnetic iron surrounding the first center magnetic iron, the top of the first center magnetic iron is connected with the top plate, the bottom of the first center magnetic iron is connected with the center magnetic conducting plate, and the height of the center annular magnetic iron is lower than the height of the first center magnetic iron; or The center magnetic group comprises a first center magnetic iron arranged on the center magnetic conducting plate and a second center magnetic iron arranged on the first center magnetic iron, the top of the second center magnetic iron is connected with the top plate, and the width of the first center magnetic iron is greater than the width of the second center magnetic iron.

10. The sound production unit according to claim 1, wherein The first cavity is a closed cavity, a first leakage hole is arranged on the sound production unit and communicates the first cavity with the outside, and a damping member is arranged on the first leakage hole.

11. The sound production unit according to claim 1, wherein The second diaphragm comprises a third folded ring and a reinforcing portion, the third folded ring is arranged around the reinforcing portion, and the outer edge of the third folded ring is connected with the support.

12. The sound production unit according to claim 11, wherein The sound production unit further comprises a back cover, the back cover is located on the side of the second diaphragm away from the first diaphragm, a second cavity is formed between the second diaphragm and the back cover, and a second leakage hole is arranged on the back cover and communicates the second cavity with the outside; and / or The sound production unit further comprises two positioning rings, the positioning rings are respectively arranged between the outer edge of the second folded ring and the support and between the outer edge of the third folded ring and the support.

13. An electronic device comprising a housing having a receiving cavity and a sound emitting unit disposed in the receiving cavity, characterized in that, The sound production unit adopts the sound production unit according to any one of claims 1-12, wherein The sound production unit divides the accommodation cavity into a front cavity and a rear cavity which are isolated from each other, a sound outlet hole is arranged on the shell and communicates with the front cavity, and the sound waves of the first diaphragm and the second diaphragm of the sound production unit are radiated to the outside through the sound outlet hole.

14. The electronic device according to claim 13, wherein A third leakage hole is further arranged on the shell and communicates with the rear cavity.

Images