Double-sided sound production monomer and electronic equipment

Abstract

The utility model relates to the technical field of electro-acoustic conversion, and provides a double-sided sound production monomer and electronic equipment, and the double-sided sound production monomer comprises a housing assembly. The magnetic circuit system is provided with a first magnetic gap and a second magnetic gap; the system comprises a first vibration system and a second vibration system, the first vibration system comprises a first diaphragm assembly and a first voice coil, the second vibration system comprises a second diaphragm assembly and a second voice coil, the projection of the first voice coil is located on the periphery of the second voice coil, the first voice coil comprises a first edge and a second edge, and the second voice coil comprises a third edge and a fourth edge. The length L11 of the first edge and the length L12 of the second edge are both not larger than 34 mm, and the length L21 of the third edge and the length L22 of the fourth edge are both not smaller than 3 mm. According to the utility model, through the structural design and specification limitation of the two voice coils in the double-sided sound production monomer, the thickness of the sound production monomer is reduced on the premise of ensuring the double-sided sound production effect, so that the problem that the whole machine cannot be stacked for use due to the increase of the thickness of the double-sided sound production device is solved.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic conversion, in particular to a double-sided sound-emitting monomer and electronic equipment. Background Art

[0002] With the expansion of the consumer electronics market, a large number of consumer electronics products such as mobile phones and laptops have been widely used. As an important acoustic component in consumer electronics, speakers are widely needed. As people's requirements for consumer electronics products increase, the performance of speakers is also attracting more and more attention.

[0003] Conventional speakers have only one diaphragm and can only produce sound on one side, which cannot meet people's multi-functional requirements for consumer electronic products. In the current conventional design, multiple conventional sound-generating devices are placed inside the smart terminal to improve the function of electronic products. However, simply placing more conventional sound-generating devices not only increases the design difficulty of the smart terminal, but also increases the manufacturing cost of the smart terminal.

[0004] The current solution is to design the speaker as a double-sided sound-emitting device and realize the different functions of the speaker by controlling the phase of the double-sided speakers. However, the double-sided sound-emitting device is thicker than the traditional single-sided sound-emitting device, which is not conducive to the stacking of the whole machine. It also makes some electronic equipment models unusable and difficult to promote effectively. Utility Model Content

[0005] In order to overcome the defects of the prior art pointed out above, the utility model provides a double-sided sound unit and an electronic device. Through the structural design and specification limitation of the two voice coils in the double-sided sound unit, the thickness of the sound unit is reduced while ensuring the double-sided sound effect, thereby solving the problem that the double-sided sound device cannot be stacked and used due to the increased thickness.

[0006] In order to solve the above technical problems, the technical solution of the utility model is:

[0007] A double-sided sound-emitting unit, comprising: a shell assembly;

[0008] A magnetic circuit system, the magnetic circuit system is connected to the housing assembly, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap;

[0009] A first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are arranged on opposite sides of the magnetic circuit system and both vibrate in a first direction, the first vibration system comprises a first diaphragm assembly and a first voice coil, the outer periphery of the first diaphragm assembly is fixed to the shell assembly, one end of the first voice coil is connected to the first diaphragm assembly, and the other end of the first voice coil is arranged corresponding to the first magnetic gap, the second vibration system comprises a second diaphragm assembly and a second voice coil, the outer periphery of the second diaphragm assembly is fixed to the shell assembly, one end of the second voice coil is connected to the second diaphragm assembly, and the other end of the second voice coil is arranged corresponding to the second magnetic gap, wherein,

[0010] Along the first direction, the projection of the first voice coil is located at the outer periphery of the projection of the second voice coil, the first voice coil and the second voice coil are both formed into a square structure, the first voice coil includes a first side and a second side connected in sequence, the second voice coil includes a third side and a fourth side connected in sequence, the length L11 of the first side and the length L12 of the second side are both not greater than 34 mm, and the length L21 of the third side and the length L22 of the fourth side are both not less than 3 mm.

[0011] According to some embodiments of the present utility model, the magnetic circuit system includes an inner magnetic circuit, an outer magnetic circuit and a magnetic yoke, the magnetic yoke includes a main body and a bent extension portion that bends and extends from the main body toward the second vibration system and the inner magnetic circuit, respectively, the inner magnetic circuit is connected to a side of the main body that is away from the first vibration system, the outer magnetic circuit is connected to a side of the bent extension portion that is away from the second vibration system, at least a portion of the bent extension portion extends along the first direction, the first magnetic gap is formed between the bent extension portion and the external magnetic circuit, and the second magnetic gap is formed between the bent extension portion and the inner magnetic circuit, and the end of the bent extension portion away from the main body is connected to the shell assembly.

[0012] In some embodiments of the present invention, the bent extension portion includes a first connecting portion connected to the main body portion and extending along the first direction, the first connecting portion extends horizontally at one end away from the main body portion toward the direction close to the shell assembly to form a second connecting portion, the first magnetic gap is formed between the first connecting portion and the external magnetic circuit, and the second magnetic gap is formed between the first connecting portion and the internal magnetic circuit, the second connecting portion is connected to the shell assembly, and the external magnetic circuit is connected to the second connecting portion.

[0013] In some embodiments of the present invention, the main body, the first connecting portion and the second connecting portion are formed as an integral stretch-molded structure.

[0014] In some embodiments of the present invention, the main body is formed into a square structure, the main body includes a long side and a short side connected in sequence, the first connecting parts are two and are located on opposite sides of the main body, along the first direction, the first side is opposite to the third side, and the second side is opposite to the fourth side; wherein,

[0015] When the two first connecting parts are respectively connected to the two short sides, L11 / L21≥1.25, L12 / L22≥1.05;

[0016] When the two first connection parts are respectively connected to the two long sides, L11 / L21≥1.05, and L12 / L22≥1.25.

[0017] In some embodiments of the present invention, the inner magnetic circuit includes a central magnet and a central magnetic conductive plate, the central magnet is mounted on the main body, and the central magnetic conductive plate is mounted on a side of the central magnet away from the main body;

[0018] The external magnetic circuit includes a side magnet and a side magnetic conductive plate, the side magnet is connected to the second connecting portion, the side magnetic conductive plate is connected to the side of the side magnet away from the second connecting portion, and the end of the side magnetic conductive plate away from the first voice coil is connected to the shell assembly.

[0019] According to some embodiments of the utility model, the first vibration system also includes a first centering support plate, the first centering support plate includes an inner fixing portion, an outer fixing portion and an extension portion connecting the inner fixing portion and the outer fixing portion, the inner fixing portion is connected to an end of the first voice coil away from the first diaphragm assembly, and the outer fixing portion is connected to the shell assembly.

[0020] In some embodiments of the present invention, the second vibration system also includes a second centering support plate, the second centering support plate is located between the second diaphragm assembly and the second voice coil, the second centering support plate includes an inner periphery, an outer periphery and a connecting arm connecting the inner periphery and the outer periphery, the opposite side surfaces of the inner periphery are respectively connected to the second voice coil and the second diaphragm assembly, and the opposite side surfaces of the outer periphery are respectively connected to the shell assembly and the second diaphragm assembly.

[0021] According to some embodiments of the utility model, the double-sided sound-emitting unit has a first working state and a second working state. In the first working state, the first diaphragm assembly and the second diaphragm assembly radiate sound waves with the same phase outwardly. In the second working state, the first diaphragm assembly and the second diaphragm assembly radiate sound waves with opposite phases outwardly.

[0022] The utility model also provides an electronic device, which comprises the double-sided sound-emitting unit according to the above embodiment of the utility model.

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

[0024] According to the double-sided sound-emitting monomer of the embodiment of the utility model, it includes a shell assembly, a magnetic circuit system, a first vibration system and a second vibration system. The first vibration system and the second vibration system are arranged on opposite sides of the magnetic circuit system and both vibrate along the first direction. The double-sided sound is realized by arranging two vibration systems. At the same time, since the first vibration system and the second vibration system share the magnetic circuit system, the design structure of the double-sided sound-emitting monomer is simplified, so that the overall thickness of the double-sided sound-emitting monomer will not be too large. In addition, through the above-mentioned structural design, when the sound waves emitted by the first vibration system and the second vibration system are in the same phase, the sound waves are superimposed and enhanced, thereby improving the stereo effect in the external speaker mode. When the sound waves emitted by the first vibration system and the second vibration system are in opposite phases, the sound waves are offset and attenuated in the far field, thereby improving the privacy protection effect in the handset call mode.

[0025] In addition, the first vibration system includes a first voice coil, and the second vibration system includes a second voice coil. Along the first direction, the projection of the first voice coil is located at the periphery of the second voice coil, that is, the inner diameter of the first voice coil is larger than the outer diameter of the second voice coil. The first voice coil and the second voice coil are both formed into a square structure. The first voice coil includes a first side and a second side connected in sequence, and the second voice coil includes a third side and a fourth side connected in sequence. The length L11 of the first side and the length L12 of the second side are both not greater than 34 mm, and the length L21 of the third side and the length L22 of the fourth side are both not less than 3 mm. Therefore, under the premise of meeting the requirements of the existing voice coil molding process, the first voice coil and the second voice coil can be designed with a set structure, which saves the occupied space and reduces the thickness of the double-sided sound unit.

[0026] In summary, the utility model provides a double-sided sound unit and an electronic device. Through the structural design and specification limitation of the two voice coils in the double-sided sound unit, the thickness of the sound unit is reduced while ensuring the double-sided sound effect, thereby solving the problem that the double-sided sound device cannot be stacked and used due to the increased thickness. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the prior art descriptions are briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without creative work. In addition, in the drawings, the components or parts are not necessarily drawn according to the actual scale.

[0028] Figure 1 It is a schematic diagram of the front structure of a double-sided sound-emitting unit according to an embodiment of the utility model;

[0029] Figure 2 It is a schematic diagram of the reverse structure of a double-sided sound-emitting unit according to an embodiment of the utility model;

[0030] Figure 3 This is a schematic structural diagram of a first connecting portion arranged along a short side of a main body according to an embodiment of the utility model;

[0031] Figure 4 It is a schematic cross-sectional structure diagram of a double-sided sound-emitting unit along the long axis direction according to an embodiment of the utility model;

[0032] Figure 5 It is a schematic cross-sectional structure diagram of a double-sided sound-emitting unit along the short axis direction according to an embodiment of the utility model;

[0033] Figure 6 This is a structural schematic diagram of a first connecting portion arranged along a long side of the main body according to another embodiment of the utility model;

[0034] Figure 7 It is a schematic cross-sectional structure diagram of a double-sided sound-emitting unit along the long axis direction according to another embodiment of the utility model;

[0035] Figure 8 It is a schematic cross-sectional structure diagram of a double-sided sound-emitting unit along the short axis direction according to another embodiment of the utility model;

[0036] Fig. 9 It is a schematic diagram of the exploded structure of a double-sided sound-emitting unit according to an embodiment of the utility model;

[0037] Fig.10 It is a schematic diagram of the structure of the first voice coil in a double-sided sound-emitting unit according to an embodiment of the utility model;

[0038] Fig.11 It is a structural schematic diagram of the first centering support piece in a double-sided sound-emitting unit according to an embodiment of the utility model;

[0039] Fig.12It is a schematic diagram of the structure of the second voice coil in a double-sided sound-emitting unit according to an embodiment of the utility model;

[0040] Fig.13 It is a structural schematic diagram of the second centering support piece in a double-sided sound-emitting unit according to an embodiment of the utility model;

[0041] Reference numerals:

[0042] 1. Shell assembly, 101. first shell, 102. second shell, 103. connection part, 104. connection terminal;

[0043] 2. Magnetic circuit system, 201. inner magnetic circuit, 2011. center magnet, 2012. center magnetic plate, 202. outer magnetic circuit, 2021. side magnet, 2022. side magnetic plate, 203. magnetic yoke, 2031. main body, 20311. long side, 20312. short side, 2032. first connecting part, 2033. second connecting part;

[0044] 3. First vibration system, 301. First diaphragm assembly, 3011. First diaphragm, 30111. First fixing portion, 30112. First folding ring portion, 30113. First center portion, 3012. First vibration plate, 302. First voice coil, 3021. First side, 3022. Second side, 303. First centering support plate, 3031. Internal fixing portion, 3032. External fixing portion, 3033. Extension portion;

[0045] 4. second vibration system, 401. second diaphragm assembly, 4011. second diaphragm, 40111. second fixing portion, 40112. second folding ring portion, 40113. second central portion, 4012. second vibration plate, 402. second voice coil, 4021. third side, 4022. fourth side, 403. second centering support plate, 4031. inner periphery, 4032. outer periphery, 4033. connecting arm;

[0046] 5. First magnetic gap, 6. Second magnetic gap, 7. Front cover, 701. Main body, 702. Installation part, 8. Dust screen, 100. Double-sided sound unit. DETAILED DESCRIPTION

[0047] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0048] It should be noted that all directional indications in the embodiments of the present invention (such as up, down, left, right, front, back...) are only used to explain the relative position relationship, movement status, etc. between the components under a certain specific posture (as shown in the accompanying drawings). If the specific posture changes, the directional indication will also change accordingly.

[0049] At the same time, the meaning of "and / or" or "and / or" appearing in the full text includes three options. Taking "A and / or B" as an example, it includes option A, or option B, or a option in which both A and B are satisfied.

[0050] In addition, in the present utility model, descriptions such as "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" and "second" may explicitly or implicitly include at least one of the features. In addition, the technical solutions between the various embodiments can be combined with each other, but they must be based on the ability of ordinary technicians in the field to implement them. When the combination of technical solutions is contradictory or cannot be implemented, it should be deemed that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0051] The present invention proposes a double-sided sound-emitting unit 100. It can be understood that the double-sided sound-emitting unit 100 is applied to electronic devices, such as mobile phones, speakers, computers, headphones, watches, televisions or tablet computers, etc., which are not limited here.

[0052] like Figure 1-Figure 13 As shown, the double-sided sound-emitting unit 100 according to the embodiment of the utility model comprises: a housing assembly 1;

[0053] A magnetic circuit system 2, the magnetic circuit system 2 is connected to the housing assembly 1, and the magnetic circuit system 2 is provided with a first magnetic gap 5 and a second magnetic gap 6;

[0054] The first vibration system 3 and the second vibration system 4 are arranged on opposite sides of the magnetic circuit system 2 and both vibrate along the first direction. The first vibration system 3 includes a first diaphragm assembly 301 and a first voice coil 302. The outer periphery of the first diaphragm assembly 301 is fixed to the shell assembly 1, one end of the first voice coil 302 is connected to the first diaphragm assembly 301, and the other end of the first voice coil 302 is arranged corresponding to the first magnetic gap 5. Specifically, the other end of the first voice coil 302 can be inserted into the first magnetic gap 5. When powered on, the first voice coil 302 vibrates up and down under the action of the magnetic field force in the first magnetic gap 5, and drives the first diaphragm assembly 301 to vibrate and make sound. The second vibration system 4 includes a second diaphragm assembly 401 and a second voice coil 402. The outer periphery of the second diaphragm assembly 401 is fixed to the shell assembly 1, one end of the second voice coil 402 is connected to the second diaphragm assembly 401, and the other end of the second voice coil 402 is arranged corresponding to the second magnetic gap 6. Specifically, the other end of the second voice coil 402 can be inserted into the second magnetic gap 6. When power is turned on, the second voice coil 402 vibrates up and down under the action of the magnetic field force in the second magnetic gap 6, and drives the second diaphragm assembly 401 to vibrate and make sound.

[0055] Among them, along the first direction, the projection of the first voice coil 302 is located at the outer periphery of the projection of the second voice coil 402, and the first voice coil 302 and the second voice coil 402 are both formed into a square structure. The first voice coil 302 includes a first side 3021 and a second side 3022 connected in sequence, and the lengths of the first side 3021 and the second side 3022 may be equal or unequal. The second voice coil 402 includes a third side 4021 and a fourth side 4022 connected in sequence, and the lengths of the third side 4021 and the fourth side 4022 may be equal or unequal. The length L11 of the first side 3021 and the length L12 of the second side 3022 are both not greater than 34 mm, and the length L21 of the third side 4021 and the length L22 of the fourth side 4022 are both not less than 3 mm.

[0056] Specifically, the first vibration system 3 and the second vibration system 4 are arranged on opposite sides of the magnetic circuit system 2 and both vibrate along the first direction. Double-sided sound is achieved by setting up two vibration systems. At the same time, since the first vibration system 3 and the second vibration system 4 share the magnetic circuit system 2, the magnetic field utilization rate is improved, the design structure of the double-sided sound-emitting unit 100 is simplified, and the overall thickness of the double-sided sound-emitting unit 100 is reduced. In addition, through the above-mentioned structural design, when the sound waves emitted by the first vibration system 3 and the second vibration system 4 are in phase, the sound waves emitted by the two sound-emitting surfaces of the double-sided sound-emitting unit 100 are superimposed and enhanced, thereby improving the stereo effect of the terminal device in the external speaker mode. When the sound waves emitted by the first vibration system 3 and the second vibration system 4 are in opposite phases, the sound waves emitted by the two sound-emitting surfaces of the double-sided sound-emitting unit 100 are offset and attenuated in the far field (for example, 20cm-30cm away from the human ear), thereby improving the privacy protection effect in the handset call mode.

[0057] In addition, the first vibration system 3 includes a first voice coil 302, and the second vibration system 4 includes a second voice coil 402. Along the first direction, the projection of the first voice coil 302 is located at the periphery of the second voice coil 402, that is, the inner diameter of the first voice coil 302 is larger than the outer diameter of the second voice coil 402. In this way, the first voice coil 302 and the second voice coil 402 can adopt a set design structure, which saves vibration space and reduces the thickness of the double-sided sound-emitting unit 100.

[0058] The first voice coil 302 and the second voice coil 402 are both formed into a square structure. The first voice coil 302 includes a first side 3021 and a second side 3022 connected in sequence. The second voice coil 402 includes a third side 4021 and a fourth side 4022 connected in sequence. The length L11 of the first side 3021 and the length L12 of the second side 3022 are both not greater than 34 mm. The length L21 of the third side 4021 and the length L22 of the fourth side 4022 are both not less than 3 mm. In a specific embodiment of the present invention, the voice coil is manufactured mainly by first winding a circular voice coil through a winding machine, and then stretching the circular voice coil into the shape of a square voice coil. Therefore, the winding processing capacity of the winding machine and the possibility of stretching and forming need to be considered when manufacturing the voice coil. When the size of the voice coil is greater than 34 mm, it is restricted by the size limit of the winding shaft of the winding machine and it is impossible to wind a larger voice coil. It is also not conducive to the stacking of electronic equipment. When the size of the voice coil is less than 3 mm, the voice coil is too small and the circular voice coil cannot be stretched into the shape of a square voice coil, resulting in the inability to form. It also affects the performance of the double-sided sound unit 100. Therefore, through the above-mentioned limitation of the voice coil size, it is possible to meet the requirements of assembly and performance while ensuring the product structure of the double-sided sound unit 100, thereby ensuring the sound quality of the double-sided sound unit 100.

[0059] like Figure 4-Figure 5 and Figure 7-Figure 9As shown, in some embodiments of the utility model, the magnetic circuit system 2 includes an inner magnetic circuit 201, an outer magnetic circuit 202 and a magnetic yoke 203, the magnetic yoke 203 is installed on the shell assembly 1, the magnetic yoke 203 includes a main body 2031 and a bent extension portion 3033 bent and extended from the main body 2031 toward the second vibration system 4 and the inner magnetic circuit 201 respectively, the inner magnetic circuit 201 is connected to the side of the main body 2031 away from the first vibration system 3, and the outer magnetic circuit 202 is connected to the side of the bent extension portion 3033 away from the second vibration system 4. Through the above-mentioned structural arrangement, the main body 2031 can be used as the magnetic yoke of the inner magnetic circuit 201, and the bent extension portion 3033 can be used as the magnetic yoke of the outer magnetic circuit 202, thereby making the structure of the magnetic yoke 203 of the magnetic circuit system 2 simple and compact, saving space and production costs. At least part of the bent extension portion 3033 extends along the first direction, and a first magnetic gap 5 is formed between the bent extension portion 3033 and the external magnetic circuit 202, and a second magnetic gap 6 is formed between the bent extension portion 3033 and the internal magnetic circuit 201. Part of the bent extension portion 3033 plays the role of an intermediate magnetic circuit, which cooperates with the external magnetic circuit 202 and the internal magnetic circuit 201 to form magnetic gaps, thereby simplifying the design structure of the magnetic circuit. One end of the bent extension portion 3033 away from the main body 2031 is connected to the shell assembly 1. By connecting the bent extension portion 3033 to the shell assembly 1, the structural stability of the magnetic circuit system 2 is improved.

[0060] like Figure 4-Figure 5 and Figure 7-Figure 9 As shown, in the embodiment of the utility model, the bent extension portion 3033 includes a first connection portion 2032 connected to the main body portion 2031 and extending along the first direction, and one end of the first connection portion 2032 away from the main body portion 2031 extends horizontally toward the direction close to the shell component 1 to form a second connection portion 2033, a first magnetic gap 5 is formed between the first connection portion 2032 and the external magnetic circuit 202, and a second magnetic gap 6 is formed between the first connection portion 2032 and the internal magnetic circuit 201, the second connection portion 2033 is connected to the shell component 1, and the external magnetic circuit 202 is connected to the second connection portion 2033, and the above It can be seen that the first connecting part 2032 can be used in conjunction with the external magnetic circuit 202 to form a first magnetic gap 5, and can also be used in conjunction with the internal magnetic circuit 201 to form a second magnetic gap 6, which simplifies the magnetic circuit design structure of the double-sided sound-emitting unit 100, reduces the production volume of the double-sided sound-emitting unit 100, and reduces the material cost. The second connecting part 2033 can be used as a magnetic yoke of the external magnetic circuit 202 to support the external magnetic circuit 202. At the same time, since the second connecting part 2033 is directly connected to the shell assembly 1, the entire magnetic yoke 203 can be fixed to improve the structural stability.

[0061] like Figure 4-Figure 5 and Figure 7-Figure 9As shown, in the embodiment of the utility model, the main body 2031, the first connecting part 2032 and the second connecting part 2033 are formed into an integral stretch-molded structure. The integral stretch-molded structure design is convenient for processing, simplifies the process flow and reduces costs.

[0062] like Figure 3-Figure 5 and Figure 6-Figure 10 , Fig.12 As shown, in an embodiment of the utility model, the main body 2031 is formed as a square structure, and the main body 2031 includes a long side 20311 and a short side 20312 connected in sequence. The lengths of the long side 20311 and the short side 20312 can be equal or unequal. There are two first connecting parts 2032 and they are located on opposite sides of the main body 2031. Therefore, the first connecting part 2032 can be set on the long side 20311 or on the short side 20312. Along the first direction, the first side 3021 is opposite to the third side 4021, and the second side 3022 is opposite to the fourth side 4022.

[0063] Among them, Figure 3-Figure 5 As shown, when the two first connection portions 2032 are respectively connected to the two short sides 20312 , L11 / L21≥1.25, L12 / L22≥1.05;

[0064] like Figure 6-Figure 8 As shown, when the two first connecting parts 2032 are respectively connected to the two long sides 20311, L11 / L21≥1.05, L12 / L22≥1.25, when the ratio of the first voice coil 302 to the second voice coil 402 is within the above numerical range, the use effect of the double-sided sound unit 100 is good.

[0065] Specifically, when the two first connecting parts 2032 are connected to the two short sides 20312, L11=L21+2*C1 (inner magnetic gap of the inner diameter of the first voice coil 302)+2*C2 (external magnetic gap of the inner diameter of the second voice coil 402)+2*T (thickness of the first connecting part 2032)+2*T2 (thickness of the second voice coil 402); L11 / L21≥1.25; L12>L22+2*T2 (thickness of the second voice coil 402), L12 / L22≥1.05.

[0066] When L21 and L22 are less than 3.0 mm, the voice coil is too small and the circular voice coil cannot be straightened into a square shape, resulting in failure to form. When L11 and L12 are greater than 34 mm, due to the size limitation of the winding shaft of the winding machine, it is impossible to wind a larger voice coil. Therefore, L21 and L22 of the second voice coil 402 and L11 and L12 of the first voice coil 302 should all be ≥3.0 mm and ≤34 mm.

[0067] When both L21 and L22 of the inner diameter dimensions of the second voice coil 402 are ≥3.0mm, based on the existing production capacity and taking into account the limit dimensions of the magnetic gap, the limit dimensions of the thickness of the first connecting part 2032, and the limit dimensions of the voice coil thickness, from L11=L21+2*C1 (inner magnetic gap of the inner diameter of the first voice coil 302)+2*C2 (outer magnetic gap of the inner diameter of the second voice coil 402)+2*T (thickness of the first connecting part 2032)+2*T2 (thickness of the second voice coil 402), it can be calculated that L11 / L21≥1.25, L12>L22+2*T2 (thickness of the second voice coil 402), and L12 / L22≥1.05.

[0068] When the inner diameter L11 and L12 of the first voice coil 302 are both ≤34 mm, according to the existing production capacity, taking into account the limit size of the magnetic gap, the limit size of the thickness of the first connecting part 2032, and the limit size of the voice coil thickness, L11=L21+2*C1(inner magnetic gap of the inner diameter of the first voice coil 302)+2*C2(outer magnetic gap of the inner diameter of the second voice coil 402)+2*T(thickness of the first connecting part 2032)+2*T2(thickness of the second voice coil 402), it can be calculated that L11 / L21≥1.03, L12>L22+2*T2(thickness of the second voice coil), it can be calculated that L12 / L22≥1.0;

[0069] In summary, L11 / L21≥1.25, L12 / L22≥1.05;

[0070] Similarly, when the two first connection portions 2032 are connected to the two long sides 20311 , L12 / L22 ≥ 1.25, and L11 / L21 ≥ 1.05.

[0071] like Figure 4-Figure 5 and Figure 7-Figure 9 As shown, in the embodiment of the utility model, the inner magnetic circuit 201 includes a central magnet 2011 and a central magnetic conductive plate 2012. The central magnet 2011 is installed on the main body 2031. The main body 2031 can be used as a magnetic conductive yoke of the inner magnetic circuit 201. The central magnetic conductive plate 2012 is installed on the side of the central magnet 2011 away from the main body 2031. From the above, it can be seen that the central magnet 2011 and the central magnetic conductive plate 2012 serve as the central magnetic circuit, and form a second magnetic gap 6 with the first connecting portion 2032 of the bent extension portion 3033, so that the second voice coil 402 can vibrate up and down when power is turned on.

[0072] The external magnetic circuit 202 includes a side magnet 2021 and a side magnetic conductive plate 2022. The side magnet 2021 is connected to the second connecting portion 2033. The second connecting portion 2033 can be used as a magnetic conductive yoke of the external magnetic circuit 202. The side magnetic conductive plate 2022 is connected to the side of the side magnet 2021 away from the second connecting portion 2033, and the end of the side magnetic conductive plate 2022 away from the first voice coil 302 is connected to the shell assembly 1. By connecting the side magnetic conductive plate 2022 to the shell assembly 1, the structural stability of the external magnetic circuit 202 is improved.

[0073] like Figure 4-Figure 5 and Figure 7-Figure 11 As shown, in some embodiments of the utility model, the first vibration system 3 also includes a first centering support piece 303, the first centering support piece 303 includes an inner fixing portion 3031, an outer fixing portion 3032 and an extension portion 3033 connecting the inner fixing portion 3031 and the outer fixing portion 3032, the inner fixing portion 3031 is connected to one end of the first voice coil 302 away from the first diaphragm assembly 301, the outer fixing portion 3032 is connected to the shell assembly 1, and the first voice coil 302 is connected and supported by the first centering support piece 303.

[0074] like Figure 4-Figure 5 and Figure 7-Figure 13 As shown, in the embodiment of the utility model, the second vibration system 4 also includes a second centering support piece 403, the second centering support piece 403 is located between the second diaphragm assembly 401 and the second voice coil 402, the second centering support piece 403 includes an inner periphery 4031, an outer periphery 4032 and a connecting arm 4033 connecting the inner periphery 4031 and the outer periphery 4032, the opposite sides of the inner periphery 4031 are respectively connected to the second voice coil 402 and the second diaphragm assembly 401, the opposite sides of the outer periphery 4032 are respectively connected to the shell assembly 1 and the second diaphragm assembly 401, through With the above-mentioned structural arrangement, the second centering support piece 403 can provide a good connection and support effect for the second voice coil 402, thereby improving the stability of the second voice coil 402. At the same time, since the second centering support piece 403 is provided with a connecting arm 4033 with elastic deformation function, the vibration effect of the second voice coil 402 is ensured so that it does not affect the acoustic effect. At the same time, since the second centering support piece 403 is also connected to the second diaphragm assembly 401, when the second voice coil 402 vibrates, it will also drive the second diaphragm assembly 401 to vibrate and sound synchronously, thereby realizing the sound effect of the second vibration system 4.

[0075] like Figure 4-Figure 5 and Figure 7-Figure 9As shown, in an embodiment of the utility model, the first diaphragm assembly 301 includes a first diaphragm 3011 and a first vibration plate 3012 arranged on the first diaphragm 3011, the first diaphragm 3011 includes a first fixing portion 30111, a first folding ring portion 30112 and a first center portion 30113 which are arranged in sequence from the outside to the inside, the first fixing portion 30111 can be fixed to the shell assembly 1 by a bonding process, the first center portion 30113 is connected to the first vibration plate 3012, and the end of the first voice coil 302 away from the first magnetic gap 5 is connected to the first vibration plate 3012, thereby realizing the assembly connection between the first diaphragm assembly 301 and the first diaphragm assembly 301.

[0076] The second diaphragm assembly 401 includes a second diaphragm 4011 and a second vibration plate 4012 arranged on the second diaphragm 4011. The second diaphragm 4011 includes a second fixing portion 40111, a second folding ring portion 40112 and a second central portion 40113 which are arranged in sequence from the outside to the inside. The second fixing portion 40111 is fixed to the second centering support plate 403, and the second central portion 40113 is connected to the second vibration plate 4012, thereby realizing the assembly connection between the second diaphragm assembly 401 and the second centering support plate 403.

[0077] Among them, the second folding ring portion 40112 is recessed and extends in a direction away from the second centering support piece 403, and the recessed direction of the first folding ring portion 30112 and the second folding ring portion 40112 is the same. According to the design structure that the second centering support piece 403 is located between the second voice coil 402 and the second diaphragm assembly 401, the second folding ring portion 40112 is recessed in a direction away from the second centering support piece 403, which can prevent the second diaphragm assembly 401 from touching the second centering support piece 403 when vibrating, thereby affecting the sound quality. By setting the recessed direction of the first folding ring portion 30112 to be the same as the recessed direction of the second folding ring portion 40112, the first folding ring portion 30112 can be recessed into the shell assembly 1, thereby reducing the thickness of the double-sided sound-emitting unit 100, so that the double-sided sound-emitting unit 100 can be made thinner.

[0078] In addition, the second centering support plate 403 can also be arranged at the end of the second voice coil 402 facing away from the second diaphragm assembly 401. At this time, the second central portion 40113 of the second centering support plate 403 is connected to the second voice coil 402, the second fixed portion 40111 is connected to the shell assembly 1, and the end of the second voice coil 402 away from the second centering support plate 403 is connected to the second diaphragm assembly 401. The outer periphery of the second diaphragm assembly 401 is fixed to the shell assembly 1. At this time, the second folding ring portion 40112 of the second diaphragm assembly 401 can be recessed into the shell assembly 1. At the same time, the first folding ring portion 30112 of the first diaphragm assembly 301 can also be recessed into the shell assembly 1, further reducing the thickness of the double-sided sound unit 100, and the double-sided sound unit 100 can be made thinner.

[0079] like Figure 1-Figure 5 As shown, in some embodiments of the present invention, the housing assembly 1 includes a first housing 101 and a second housing 102, the first housing 101 and the second housing 102 are arranged correspondingly, the first diaphragm assembly 301 is arranged at one end of the first housing 101 away from the second housing 102, and the second diaphragm assembly 401 is arranged at one end of the second housing 102 away from the first housing 101. By dividing the housing assembly 1 into the first housing 101 and the second housing 102, injection molding is facilitated;

[0080] One side of the second housing 102 protrudes from the first housing 101 and forms a wiring portion 103. The wiring portion 103 is provided with a plurality of wiring terminals 104 connected to the first voice coil 302 and the second voice coil 402. The wiring surfaces of the plurality of wiring terminals 104 are located in the same plane. By providing the wiring portion 103, the wiring portion 103 is provided with a plurality of wiring terminals 104, and the wiring surfaces of the plurality of wiring terminals 104 are arranged in the same plane, which facilitates wiring.

[0081] like Figure 1 , Figure 4-Figure 9 As shown, in some embodiments of the utility model, a front cover 7 is further provided on the side of the first diaphragm assembly 301 facing away from the first shell 101, and the front cover 7 forms a sound outlet. The front cover 7 includes a main body 701 and a mounting portion 702 arranged around the main body 701, and the mounting portion 702 is connected to the positioning columns arranged on the first shell 101. The mounting portion 702 can be positioned by the positioning columns. After the positioning is completed, the front cover 7 is fixed to the first shell 101 by hot melting the positioning columns. The outer peripheral edge of the first diaphragm assembly 301 is arranged between the first shell 101 and the mounting portion 702. Since the outer peripheral edge of the first diaphragm assembly 301 is located between the first shell 101 and the mounting portion 702, the front cover 7 protects the diaphragm.

[0082] In addition, in this embodiment, a dustproof net 8 is installed on the side of the front cover 7 away from the first shell 101. The dustproof net 8 is provided to reduce the dust in the air from entering the double-sided sound-emitting unit 100 and affecting the performance of the double-sided sound-emitting unit 100.

[0083] like Figure 4-Figure 5 and Figure 7-Figure 8As shown, according to some embodiments of the utility model, the double-sided sound-emitting monomer 100 can have a first working state and a second working state. In the first working state, the first diaphragm assembly 301 and the second diaphragm assembly 401 radiate sound waves with the same phase outwardly, and in the second working state, the first diaphragm assembly 301 and the second diaphragm assembly 401 radiate sound waves with opposite phases outwardly. Therefore, when the double-sided sound-emitting monomer 100 is applied to a terminal device (such as a mobile phone), when the terminal device is in an external speaker mode, the double-sided sound-emitting monomer 100 enters the first working state, the first diaphragm assembly 301 and the second diaphragm assembly 401 radiate sound waves with the same phase outwardly, and the two-sided sound waves are superimposed on each other, which can improve the external speaker effect of the terminal device. When the terminal device is in the handset mode, the double-sided sound-emitting monomer 100 enters the second working state, the first diaphragm assembly 301 and the second diaphragm assembly 401 radiate sound waves with opposite phases outwardly, and the two-sided sound waves cancel each other out in the far field (for example, a distance of 20cm-50cm from the human ear), thereby improving the privacy protection effect when the terminal device is talking.

[0084] The utility model also proposes an electronic device, which includes a double-sided sound-emitting unit 100. The specific structure of the double-sided sound-emitting unit 100 refers to the aforementioned embodiment. Since the electronic device adopts all the technical solutions of all the aforementioned embodiments, it has at least all the beneficial effects brought by the technical solutions of the aforementioned embodiments, which will not be described one by one here.

[0085] In addition, the double-sided sound unit 100 can also be assembled with the shell into a sound module, and installed in the electronic device in the form of a sound module.

[0086] It is understandable that the electronic device may be a mobile phone, a speaker, a computer, a headset, a watch, a television or a tablet computer, etc., and is not limited here.

[0087] It should be understood that the purpose of these embodiments is only to illustrate the utility model and is not intended to limit the protection scope of the utility model. In addition, it should also be understood that after reading the technical content of the utility model, those skilled in the art can make various changes, modifications and / or variations to the utility model, and all of these equivalent forms also fall within the protection scope defined by the claims attached to this application.

Claims

1. A double-sided sound-emitting unit, characterized in that: include: Shell assembly; A magnetic circuit system, the magnetic circuit system is connected to the housing assembly, the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap; A first vibration system and a second vibration system, wherein the first vibration system and the second vibration system are arranged on opposite sides of the magnetic circuit system and both vibrate in a first direction, the first vibration system comprises a first diaphragm assembly and a first voice coil, the outer periphery of the first diaphragm assembly is fixed to the shell assembly, one end of the first voice coil is connected to the first diaphragm assembly, and the other end of the first voice coil is arranged corresponding to the first magnetic gap, the second vibration system comprises a second diaphragm assembly and a second voice coil, the outer periphery of the second diaphragm assembly is fixed to the shell assembly, one end of the second voice coil is connected to the second diaphragm assembly, and the other end of the second voice coil is arranged corresponding to the second magnetic gap, wherein, Along the first direction, the projection of the first voice coil is located at the outer periphery of the projection of the second voice coil, the first voice coil and the second voice coil are both formed into a square structure, the first voice coil includes a first side and a second side connected in sequence, the second voice coil includes a third side and a fourth side connected in sequence, the length L11 of the first side and the length L12 of the second side are both not greater than 34 mm, and the length L21 of the third side and the length L22 of the fourth side are both not less than 3 mm.

2. The double-sided sound-emitting unit according to claim 1, characterized in that: The magnetic circuit system includes an inner magnetic circuit, an outer magnetic circuit and a magnetic yoke. The magnetic yoke includes a main body and a bent extension portion that bends and extends from the main body toward the second vibration system and the inner magnetic circuit, respectively. The inner magnetic circuit is connected to a side of the main body that is away from the first vibration system, and the outer magnetic circuit is connected to a side of the bent extension portion that is away from the second vibration system. At least a portion of the bent extension portion extends along the first direction. The first magnetic gap is formed between the bent extension portion and the outer magnetic circuit, and the second magnetic gap is formed between the bent extension portion and the inner magnetic circuit. An end of the bent extension portion away from the main body is connected to the shell assembly.

3. The double-sided sound-emitting unit according to claim 2, characterized in that: The bent extension portion includes a first connection portion connected to the main body portion and extending along the first direction, the first connection portion extends horizontally from one end of the main body portion toward the direction close to the shell assembly to form a second connection portion, the first magnetic gap is formed between the first connection portion and the external magnetic circuit, and the second magnetic gap is formed between the first connection portion and the internal magnetic circuit, the second connection portion is connected to the shell assembly, and the external magnetic circuit is connected to the second connection portion.

4. The double-sided sound-emitting unit according to claim 3, characterized in that: The main body, the first connecting portion and the second connecting portion are formed as an integral stretch-molded structure.

5. The double-sided sound-emitting unit according to claim 3, characterized in that: The main body is formed into a square structure, the main body includes a long side and a short side connected in sequence, the first connecting parts are two and are located on opposite sides of the main body, along the first direction, the first side is opposite to the third side, and the second side is opposite to the fourth side; wherein, When the two first connecting parts are respectively connected to the two short sides, L11 / L21≥1.25, L12 / L22≥1.05; When the two first connection parts are respectively connected to the two long sides, L11 / L21≥1.05, and L12 / L22≥1.

25.

6. The double-sided sound-emitting unit according to claim 3, characterized in that: The inner magnetic circuit includes a central magnet and a central magnetic conductive plate, wherein the central magnet is mounted on the main body, and the central magnetic conductive plate is mounted on a side of the central magnet away from the main body; The external magnetic circuit includes a side magnet and a side magnetic conductive plate, the side magnet is connected to the second connecting portion, the side magnetic conductive plate is connected to the side of the side magnet away from the second connecting portion, and the end of the side magnetic conductive plate away from the first voice coil is connected to the shell assembly.

7. The double-sided sound-emitting unit according to any one of claims 1 to 6, characterized in that: The first vibration system also includes a first centering support plate, which includes an inner fixing portion, an outer fixing portion, and an extension portion connecting the inner fixing portion and the outer fixing portion, the inner fixing portion is connected to an end of the first voice coil away from the first diaphragm assembly, and the outer fixing portion is connected to the shell assembly.

8. The double-sided sound-emitting unit according to claim 7, characterized in that: The second vibration system also includes a second centering support plate, which is located between the second diaphragm assembly and the second voice coil. The second centering support plate includes an inner periphery, an outer periphery, and a connecting arm connecting the inner periphery and the outer periphery. The opposite side surfaces of the inner periphery are respectively connected to the second voice coil and the second diaphragm assembly, and the opposite side surfaces of the outer periphery are respectively connected to the shell assembly and the second diaphragm assembly.

9. The double-sided sound-emitting unit according to any one of claims 1 to 6, characterized in that: The double-sided sound-emitting unit has a first working state and a second working state. In the first working state, the first diaphragm assembly and the second diaphragm assembly radiate sound waves with the same phase outwardly. In the second working state, the first diaphragm assembly and the second diaphragm assembly radiate sound waves with opposite phases outwardly.

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

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