Double-sided sound production unit and electronic device

Abstract

A double-sided sound production unit and an electronic device. The double-sided sound production unit comprises a housing assembly; a magnetic circuit system, the magnetic circuit system being provided with a first magnetic gap and a second magnetic gap; and a first vibration system and a second vibration system, the first vibration system comprising a first diaphragm assembly and a first voice coil, and the second vibration system comprising a second diaphragm assembly and a second voice coil, wherein the projection of the first voice coil is located on the periphery of the second voice coil, the first voice coil comprises a first side and a second side, the second voice coil comprises a third side and a fourth side, the length L11 of the first side and the length L12 of the second side are each not greater than 34 mm, and the length L21 of the third side and the length L22 of the fourth side are each not less than 3 mm.

Description

Double-sided sound emitting monomer and electronic device TECHNICAL FIELD

[0001] The utility model relates to electroacoustic conversion technical field especially relates to a double-sided sound emitting monomer and electronic device. BACKGROUND

[0002] With the expansion of the consumer electronics market, a large number of mobile phones, notebook computers and other consumer electronics products are widely used, as an important acoustic component in consumer electronics products, the speaker has extensive demand. With the improvement of people's requirements for consumer electronics products, the performance of the speaker is also more and more people's attention.

[0003] The conventional speaker has only one diaphragm, which can only emit sound on one side, and cannot meet people's functional requirements for consumer electronics products. At present, in the conventional design, multiple conventional sound emitting devices are placed in the intelligent terminal to improve the function of the electronic product, but only by placing multiple conventional sound emitting devices, not only increases the design difficulty of the intelligent terminal, but also increases the manufacturing cost of the intelligent terminal.

[0004] The current solution is to design the speaker into a double-sided sound emitting device, and to realize different functions of the speaker by controlling the phase of the double-sided speaker, but 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, and also leads to the use of some electronic equipment models, which is difficult to effectively promote.

[0005] Utility model content

[0006] In order to overcome the defects of the prior art pointed out above, the utility model provides a double-sided sound emitting monomer and electronic device, by the structure design and specification limit of two voice coils in the double-sided sound emitting monomer, under the premise of guaranteeing the double-sided sound emitting effect, the thickness of the sound emitting monomer is reduced, so as to solve the problem that the whole machine cannot be stacked and used due to the increase of the thickness of the double-sided sound emitting device.

[0007] To solve the above technical problems, the technical scheme of the utility model is:

[0008] A double-sided sound emitting monomer, comprising: a shell assembly;

[0009] A magnetic circuit system is connected with the shell assembly, and the magnetic circuit system is provided with a first magnetic gap and a second magnetic gap;

[0010] A first vibration system and a second vibration system are arranged on opposite sides of the magnetic circuit system and vibrate in a first direction, the first vibration system comprises a first diaphragm assembly and a first voice coil, an 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 correspondingly to the first magnetic gap, the second vibration system comprises a second diaphragm assembly and a second voice coil, an 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 correspondingly to the second magnetic gap, wherein,

[0011] In the first direction, a projection of the first voice coil is located outside a projection periphery of the second voice coil, the first voice coil and the second voice coil are both formed in a square structure, the first voice coil comprises a first side and a second side connected in sequence, the second voice coil comprises a third side and a fourth side connected in sequence, a length L11 of the first side and a length L12 of the second side are both not greater than 34 mm, and a length L21 of the third side and a length L22 of the fourth side are both not less than 3 mm.

[0012] According to some embodiments of the utility model, the magnetic circuit system comprises an inner magnetic circuit, an outer magnetic circuit and a magnetic yoke, the magnetic yoke comprises a body part and a bent extension part bent and extended from the body part towards the second vibration system and the inner magnetic circuit respectively, the inner magnetic circuit is connected to one side of the body part away from the first vibration system, the outer magnetic circuit is connected to one side of the bent extension part away from the second vibration system, at least part of the bent extension part extends in the first direction, the first magnetic gap is formed between the bent extension part and the outer magnetic circuit, and the second magnetic gap is formed between the bent extension part and the inner magnetic circuit, and one end of the bent extension part away from the body part is connected to the shell assembly.

[0013] In some embodiments of the utility model, the bent extension part comprises a first connecting part connected to the body part and extending in the first direction, one end of the first connecting part away from the body part extends horizontally towards the shell assembly to form a second connecting part, the first magnetic gap is formed between the first connecting part and the outer magnetic circuit, and the second magnetic gap is formed between the first connecting part and the inner magnetic circuit, the second connecting part is connected to the shell assembly, and the outer magnetic circuit is connected to the second connecting part.

[0014] In some embodiments of the utility model, the body part, the first connecting part and the second connecting part are formed in an integral stretch forming structure.

[0015] In some embodiments of the utility model, the body part is formed as a square structure, the body part includes long sides and short sides connected in sequence, the first connecting part is two and is located on opposite sides of the body part, along the first direction, the first side is opposite to the third side, and the second side is opposite to the fourth side.

[0016] When the two first connecting parts are connected with the two short sides respectively, L11 / L21≥1.25, and L12 / L22≥1.05.

[0017] When the two first connecting parts are connected with the two long sides respectively, L11 / L21≥1.05, and L12 / L22≥1.25.

[0018] In some embodiments of the utility model, the inner magnetic circuit includes a center magnet and a center magnetic conducting plate, the center magnet is installed on the body part, and the center magnetic conducting plate is installed on the side of the center magnet away from the body part.

[0019] The outer magnetic circuit includes an edge magnet and an edge magnetic conducting plate, the edge magnet is connected to the second connecting part, the edge magnetic conducting plate is connected to the side of the edge magnet away from the second connecting part, and the end of the edge magnetic conducting plate away from the first voice coil is connected to the shell assembly.

[0020] According to some embodiments of the utility model, the first vibration system further includes a first centering support, the first centering support includes an inner fixing part, an outer fixing part, and an extension part connecting the inner fixing part and the outer fixing part, the inner fixing part is connected to the end of the first voice coil away from the first diaphragm assembly, and the outer fixing part is connected to the shell assembly.

[0021] In some embodiments of the utility model, the second vibration system further includes a second centering support, the second centering support is located between the second diaphragm assembly and the second voice coil, the second centering support includes an inner periphery, an outer periphery, and a connecting arm connecting the inner periphery and the outer periphery, the opposite sides of the inner periphery are respectively connected to the second voice coil and the second diaphragm assembly, and the opposite sides of the outer periphery are respectively connected to the shell assembly and the second diaphragm assembly.

[0022] According to some embodiments of the utility model, the double-sided sound production 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 outward, and in the second working state, the first diaphragm assembly and the second diaphragm assembly radiate sound waves with opposite phases outward.

[0023] The utility model also provides an electronic equipment, electronic equipment includes according to the double-sided sound emitting monomer of utility model above embodiment.

[0024] After adopting above-mentioned technical scheme, the beneficial effects of the utility model are:

[0025] According to the double-sided sound emitting monomer of utility model embodiment, it includes shell assembly, magnetic circuit system, first vibration system and second vibration system, and the first vibration system and the second vibration system are arranged on the opposite sides of the magnetic circuit system and vibrate along the first direction, two vibration systems are arranged to realize double-sided sound emitting, and simultaneously, 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 is not 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, so that the stereo sound effect in the external mode of the loudspeaker is improved, when the sound waves emitted by the first vibration system and the second vibration system are in opposite phases, the sound waves are attenuated in the far field, so that the privacy protection effect in the receiver call mode is improved.

[0026] In addition, the first vibration system includes a first voice coil, and the second vibration system includes a second voice coil, and along the first direction, the projection of the first voice coil is located at the outer periphery of the second voice coil, that is, the inner diameter size of the first voice coil is greater than the outer diameter size 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 34mm, and the length L21 of the third side and the length L22 of the fourth side are both not less than 3mm, so that under the premise of meeting the existing voice coil forming process requirements, the first voice coil and the second voice coil can adopt a sleeved structure in design, the occupied space is saved, and the thickness of the double-sided sound emitting monomer is reduced.

[0027] In summary, the utility model provides a double-sided sound emitting monomer and an electronic equipment, through the structural design and specification limitation of two voice coils in the double-sided sound emitting monomer, under the premise of ensuring the double-sided sound emitting effect, the thickness of the sound emitting monomer is reduced, 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 emitting device is solved. BRIEF DESCRIPTION OF DRAWINGS

[0028] In order to more clearly illustrate the technical solutions of the embodiments of the present application or the prior art, the following will briefly introduce the drawings needed to be used in the embodiments or the prior art description. Obviously, the drawings in the following description only show some of the embodiments of the present application, and for those skilled in the art, other drawings can also be obtained according to the structures shown in these drawings without any creative effort. In addition, in the drawings, each element or part is not necessarily drawn according to the actual proportion.

[0029] Fig. 1 is a front structure schematic diagram of a double-sided sound emitting monomer according to one embodiment of the present application;

[0030] Fig. 2 is a back structure schematic diagram of the double-sided sound emitting monomer according to one embodiment of the present application;

[0031] Fig. 3 is a structure schematic diagram of a first connecting part arranged along a short edge of a body part according to one embodiment of the present application;

[0032] Fig. 4 is a cross-sectional structure schematic diagram of the double-sided sound emitting monomer along a long axis direction according to one embodiment of the present application;

[0033] Fig. 5 is a cross-sectional structure schematic diagram of the double-sided sound emitting monomer along a short axis direction according to one embodiment of the present application;

[0034] Fig. 6 is a structure schematic diagram of the first connecting part arranged along a long edge of the body part according to another embodiment of the present application;

[0035] Fig. 7 is a cross-sectional structure schematic diagram of the double-sided sound emitting monomer along the long axis direction according to another embodiment of the present application;

[0036] Fig. 8 is a cross-sectional structure schematic diagram of the double-sided sound emitting monomer along the short axis direction according to another embodiment of the present application;

[0037] Fig. 9 is an exploded structure schematic diagram of the double-sided sound emitting monomer according to one embodiment of the present application;

[0038] Fig. 10 is a structure schematic diagram of a first voice coil in the double-sided sound emitting monomer according to one embodiment of the present application;

[0039] Fig. 11 is a structure schematic diagram of a first centering branch in the double-sided sound emitting monomer according to one embodiment of the present application;

[0040] Fig. 12 is a structure schematic diagram of a second voice coil in the double-sided sound emitting monomer according to one embodiment of the present application;

[0041] Fig. 13 is a structure schematic diagram of a second centering branch in the double-sided sound emitting monomer according to one embodiment of the present application;

[0042] Label: 1, shell assembly, 101, first shell, 102, second shell, 103, wiring part, 104, wiring terminal; 2, magnetic circuit system, 201, inner magnetic circuit, 2011, center magnet, 2012, center magnetic conducting plate, 202, outer magnetic circuit, 2021, side magnet, 2022, side magnetic conducting plate, 203, magnetic conducting yoke, 2031, body part, 20311, long side, 20312, short side, 2032, first connecting part, 2033, second connecting part; 3, first vibration system, 301, first diaphragm assembly, 3011, first diaphragm, 30111, first fixed part, 30112, first folded ring part, 30113, first center part, 3012, first vibration plate, 302, first voice coil, 3021, first side, 3022, second side, 303, first centering branch, 3031, inner fixed part, 3032, outer fixed part, 3033, extension part; 4, second vibration system, 401, second diaphragm assembly, 4011, second diaphragm, 40111, second fixed part, 40112, second folded ring part, 40113, second center part, 4012, second vibration plate, 402, second voice coil, 4021, third side, 4022, fourth side, 403, second centering branch, 4031, inner periphery, 4032, outer periphery, 4033, connecting arm; 5, first magnetic gap, 6, second magnetic gap, 7, front cover, 701, main body part, 702, mounting part, 8, dust screen, 100, double-sided sound production monomer. DETAILED DESCRIPTION

[0043] The technical solutions in the embodiments of the present application will be clearly and completely described below with reference to the drawings in the embodiments of the present application. Obviously, the described embodiments are only part of the embodiments of the present application, rather than all the embodiments. Based on the embodiments in the present application, all other embodiments obtained by those skilled in the art without creative labor fall within the scope of protection of the present application.

[0044] It should be noted that all directional indications (such as up, down, left, right, front, back, etc.) in the embodiments of the present application are only used to explain the relative positional relationship, movement condition, etc. between components in a certain posture (as shown in the drawings), and if the certain posture changes, the directional indications also change accordingly.

[0045] Meanwhile, "and / or" or "and / or" appearing throughout the text means that it includes three schemes, taking "A and / or B" as an example, including A scheme, or B scheme, or A and B schemes are satisfied at the same time.

[0046] In addition, the description of "first", "second" and the like in the present application is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the technical features or implying the number of the indicated technical features. Therefore, the features limited by "first" and "second" can be explicitly or implicitly included at least one of the features. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or unachievable, it should be considered that the combination of technical solutions does not exist, nor in the protection scope required by the present application.

[0047] The utility model provides a double -sided sounding monomer 100 can understand, this double -sided sounding monomer 100 is applied to electronic equipment, for example mobile phone, sound equipment, computer, earphone, watch, television or tablet computer etc., here is not limited.

[0048] As shown in Figures 1-13, according to the double -sided sounding monomer 100 of the utility model embodiment, including: shell assembly 1;

[0049] Magnetic circuit system 2, magnetic circuit system 2 is connected with shell assembly 1, and magnetic circuit system 2 is provided with first magnetic gap 5 and second magnetic gap 6;

[0050] First vibration system 3 and second vibration system 4, first vibration system 3 and second vibration system 4 are arranged on the opposite sides of magnetic circuit system 2 and vibrate along the first direction, and first vibration system 3 includes first diaphragm assembly 301 and first voice coil 302, the outer periphery of first diaphragm assembly 301 is fixed to shell assembly 1, one end of first voice coil 302 is connected with first diaphragm assembly 301, and the other end of first voice coil 302 is correspondingly arranged with first magnetic gap 5, specifically, the other end of first voice coil 302 can be inserted into first magnetic gap 5, under the condition of electrification, first voice coil 302 vibrates up and down under the action of magnetic field force in first magnetic gap 5, and drives first diaphragm assembly 301 to vibrate and sound. Second vibration system 4 includes second diaphragm assembly 401 and second voice coil 402, the outer periphery of second diaphragm assembly 401 is fixed to shell assembly 1, one end of second voice coil 402 is connected with second diaphragm assembly 401, and the other end of second voice coil 402 is correspondingly arranged with second magnetic gap 6, specifically, the other end of second voice coil 402 can be inserted into second magnetic gap 6, under the condition of electrification, second voice coil 402 vibrates up and down under the action of magnetic field force in second magnetic gap 6, and drives second diaphragm assembly 401 to vibrate and sound.

[0051] The projection of the first voice coil 302 is located outside the projection of the second voice coil 402 along the first direction, the first voice coil 302 and the second voice coil 402 are both formed in a square structure, the first voice coil 302 includes a first side 3021 and a second side 3022 connected in sequence, the length of the first side 3021 and the length of the second side 3022 can be equal or not equal, the second voice coil 402 includes a third side 4021 and a fourth side 4022 connected in sequence, the length of the third side 4021 and the length of the fourth side 4022 can be equal or not equal, the length L11 of the first side 3021 and the length L12 of the second side 3022 are both not greater than 34mm, and the length L21 of the third side 4021 and the length L22 of the fourth side 4022 are both not less than 3mm.

[0052] Specifically, the first vibration system 3 and the second vibration system 4 are arranged on opposite sides of the magnetic circuit system 2 and vibrate along the first direction, so that the double-sided sound emission is realized by arranging two vibration systems, and the magnetic field utilization rate is improved, the design structure of the double-sided sound emission unit 100 is simplified, and the overall thickness of the double-sided sound emission unit 100 is reduced. In addition, through the above structure design, when the sound waves emitted by the first vibration system 3 and the second vibration system 4 have the same phase, the sound waves emitted by the two sound emission surfaces of the double-sided sound emission unit 100 are superimposed and enhanced, which improves the stereo sound effect of the terminal device in the external mode. When the sound waves emitted by the first vibration system 3 and the second vibration system 4 have opposite phases, the sound waves emitted by the two sound emission surfaces of the double-sided sound emission unit 100 are attenuated in the far field (for example, a distance of 20-30cm away from the human ear), which improves the privacy protection effect in the earpiece call mode.

[0053] In addition, the first vibration system 3 includes the first voice coil 302, and the second vibration system 4 includes the second voice coil 402. The projection of the first voice coil 302 is located outside the projection of the second voice coil 402 along the first direction, that is, the inner diameter size of the first voice coil 302 is greater than the outer diameter size of the second voice coil 402, so that the first voice coil 302 and the second voice coil 402 can adopt a nested design structure, thereby saving the vibration space and reducing the thickness of the double-sided sound emission unit 100.

[0054] The first voice coil 302 and the second voice coil 402 are both formed in a square structure, the first voice coil 302 comprises a first side 3021 and a second side 3022 connected in sequence, the second voice coil 402 comprises 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, 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. In an embodiment of the utility model, the voice coil is mainly made by winding a circular voice coil through a winding machine and then stretching the circular voice coil into a square shape, therefore, the winding processing capacity of the winding machine and the possibility of stretching need to be considered when the voice coil is made, when the size of the voice coil is greater than 34 mm, the size of the winding shaft of the winding machine is limited, so that a voice coil with a larger size cannot be wound, and meanwhile, the stacking of the electronic equipment is not conducive, when the size of the voice coil is less than 3 mm, the voice coil is too small, so that the circular voice coil cannot be stretched into a square shape, resulting in that the voice coil cannot be formed, and meanwhile, the performance of the double-sided sound emitting unit 100 is affected, therefore, through the limitation of the size of the voice coil, the requirements of assembly and performance can be met under the condition of ensuring the product structure of the double-sided sound emitting unit 100, and the sound quality of the double-sided sound emitting unit 100 is ensured.

[0055] As shown in FIGS. 4-5 and 7-9, in some embodiments of the utility model, the magnetic circuit system 2 comprises 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 comprises a body part 2031 and a bent extension part 3033 bent and extended from the body part 2031 towards the second vibration system 4 and the inner magnetic circuit 201 respectively, the inner magnetic circuit 201 is connected to one side of the body part 2031 away from the first vibration system 3, the outer magnetic circuit 202 is connected to one side of the bent extension part 3033 away from the second vibration system 4, through the above structure, the body part 2031 can be used as the magnetic yoke of the inner magnetic circuit 201, and the bent extension part 3033 can be used as the magnetic yoke of the outer magnetic circuit 202, so that the structure of the magnetic yoke 203 of the magnetic circuit system 2 can be simplified and compact, and space and production cost are saved. At least part of the bent extension part 3033 extends along the first direction, the first magnetic gap 5 is formed between the bent extension part 3033 and the outer magnetic circuit 202, and the second magnetic gap 6 is formed between the bent extension part 3033 and the inner magnetic circuit 201, and part of the bent extension part 3033 plays a role of an intermediate magnetic circuit, which cooperates with the outer magnetic circuit 202 and the inner magnetic circuit 201 to form magnetic gaps, so that the design structure of the magnetic circuit is simplified, and one end of the bent extension part 3033 away from the body part 2031 is connected with the shell assembly 1, so that the structure stability of the magnetic circuit system 2 is better through the connection of the bent extension part 3033 and the shell assembly 1.

[0056] As shown in FIG. 4-5 and FIG. 7-9, in the embodiment of the utility model, the bending extension part 3033 includes the first connecting part 2032 connected with the body part 2031 and extending along the first direction, the second connecting part 2033 is formed by the end of the first connecting part 2032 away from the body part 2031 extending horizontally to the direction close to the shell assembly 1, the first connecting part 2032 forms the first magnetic gap 5 with the outer magnetic circuit 202 and forms the second magnetic gap 6 with the inner magnetic circuit 201, the second connecting part 2033 is connected with the shell assembly 1, and the outer magnetic circuit 202 is connected to the second connecting part 2033, as known from the above, the first connecting part 2032 can be used with the outer magnetic circuit 202 to form the first magnetic gap 5, and can be used with the inner magnetic circuit 201 to form the second magnetic gap 6, which simplifies the magnetic circuit design structure of the double-sided sound emitting monomer 100, reduces the manufacturing volume of the double-sided sound emitting monomer 100, and reduces the material cost, the second connecting part 2033 can be used as a magnetic yoke of the outer magnetic circuit 202, which supports the outer magnetic circuit 202, and at the same time, since the second connecting part 2033 is directly connected with the shell assembly 1, the entire magnetic yoke 203 can be fixed, thereby improving the structural stability.

[0057] As shown in FIG. 4-5 and FIG. 7-9, in the embodiment of the utility model, the body part 2031, the first connecting part 2032 and the second connecting part 2033 are formed as an integral stretch forming structure, through the structure design of integral stretch forming, the processing is convenient, the process flow can be simplified, and the cost is reduced.

[0058] As shown in FIG. 3-5 and FIG. 6-10, 12, in the embodiment of the utility model, the body part 2031 is formed as a square structure, the body part 2031 includes sequentially connected long edges 20311 and short edges 20312, the lengths of the long edges 20311 and the short edges 20312 can be equal or unequal, the first connecting part 2032 is two and located at opposite sides of the body part 2031, thereby the first connecting part 2032 can be arranged on the long edge 20311 or the short edge 20312, along the first direction, the first edge 3021 is opposite to the third edge 4021, and the second edge 3022 is opposite to the fourth edge 4022.

[0059] As shown in FIG. 3-5, when the two first connecting parts 2032 are connected with the two short edges 20312 respectively, L11 / L21≥1.25, L12 / L22≥1.05;

[0060] As shown in FIG. 6-8, when the two first connecting parts 2032 are connected with the two long edges 20311 respectively, 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 emitting monomer 100 is good.

[0061] Specifically, when two first connecting portions 2032 are connected to two short sides 20312, L11 = L21 + 2*C1 (inner magnetic gap of inner diameter of first voice coil 302) + 2*C2 (outer magnetic gap of inner diameter of second voice coil 402) + 2*T (thickness of first connecting portion 2032) + 2*T2 (thickness of second voice coil 402); L11 / L21≥1.25; L12>L22+2*T2 (thickness of second voice coil 402), L12 / L22≥1.05.

[0062] When L21 and L22 are less than 3.0 mm, the voice coil is too small, 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, it is limited by the size of the winding shaft of the winding machine, and it is impossible to wind a larger size voice coil; therefore, L21 and L22 of the second voice coil 402 and L11 and L12 of the first voice coil 302 should be≥3.0 mm and≤34 mm.

[0063] When L21 and L22 of the inner diameter size of the second voice coil 402 are≥3.0 mm, according to the existing production capacity, considering the limit size of the magnetic gap, the limit size of the thickness of the first connecting portion 2032, and the limit size of the thickness of the voice coil, L11 = L21 + 2*C1 (inner magnetic gap of inner diameter of first voice coil 302) + 2*C2 (outer magnetic gap of inner diameter of second voice coil 402) + 2*T (thickness of first connecting portion 2032) + 2*T2 (thickness of second voice coil 402), L11 / L21≥1.25, L12>L22+2*T2 (thickness of second voice coil 402), L12 / L22≥1.05 can be calculated.

[0064] When L11 and L12 of the inner diameter size of the first voice coil 302 are≤34 mm, according to the existing production capacity, considering the limit size of the magnetic gap, the limit size of the thickness of the first connecting portion 2032, and the limit size of the thickness of the voice coil, L11 = L21 + 2*C1 (inner magnetic gap of inner diameter of first voice coil 302) + 2*C2 (outer magnetic gap of inner diameter of second voice coil 402) + 2*T (thickness of first connecting portion 2032) + 2*T2 (thickness of second voice coil 402), L11 / L21≥1.03, L12>L22+2*T2 (thickness of second voice coil), L12 / L22≥1.0 can be calculated.

[0065] In summary, L11 / L21≥1.25, L12 / L22≥1.05;

[0066] Similarly, when two first connecting portions 2032 are connected to two long sides 20311, L12 / L22≥1.25, L11 / L21≥1.05.

[0067] As shown in FIG. 4-5 and FIG. 7-9, in the embodiment of the utility model, the inner magnetic circuit 201 includes center magnet 2011 and center magnetic conducting plate 2012, the center magnet 2011 is installed in the body part 2031, the body part 2031 can be used as the magnetic conducting yoke of the inner magnetic circuit 201, the center magnetic conducting plate 2012 is installed on the side of the center magnet 2011 away from the body part 2031, as known from the above, the center magnet 2011 and the center magnetic conducting plate 2012 serve as the center magnetic circuit, and form the second magnetic gap 6 with the first connecting part 2032 of the bending extension part 3033, so that the second voice coil 402 can vibrate up and down when energized.

[0068] The outer magnetic circuit 202 includes side magnet 2021 and side magnetic conducting plate 2022, the side magnet 2021 is connected to the second connecting part 2033, the second connecting part 2033 can be used as the magnetic conducting yoke of the outer magnetic circuit 202, the side magnetic conducting plate 2022 is connected to the side of the side magnet 2021 away from the second connecting part 2033, and the end of the side magnetic conducting plate 2022 away from the first voice coil 302 is connected to the shell assembly 1, by connecting the side magnetic conducting plate 2022 with the shell assembly 1, the structure stability of the outer magnetic circuit 202 is better.

[0069] As shown in FIG. 4-5 and FIG. 7-11, in some embodiments of the utility model, the first vibration system 3 further includes a first centering support 303, the first centering support 303 includes an inner fixed part 3031, an outer fixed part 3032 and an extension part 3033 connecting the inner fixed part 3031 and the outer fixed part 3032, the inner fixed part 3031 is connected to the end of the first voice coil 302 away from the first diaphragm assembly 301, the outer fixed part 3032 is connected to the shell assembly 1, and the first centering support 303 plays a role of connecting and supporting the first voice coil 302.

[0070] As shown in FIG. 4-5 and FIG. 7-13, in the embodiment of the utility model, second vibration system 4 still includes second centering branch 403, second centering branch 403 is located between second diaphragm assembly 401 and second voice coil 402, second centering branch 403 includes inner periphery 4031, outer periphery 4032 and connecting arm 4033 connecting inner periphery 4031 and outer periphery 4032, the opposite sides of inner periphery 4031 are connected with second voice coil 402 and second diaphragm assembly 401 respectively, the opposite sides of outer periphery 4032 are connected with shell assembly 1 and second diaphragm assembly 401 respectively, through the above structure setting, second centering branch 403 can play good connection, supporting effect to second voice coil 402, improve the stability of second voice coil 402, at the same time, since the connecting arm 4033 with elastic deformation function is equipped on second centering branch 403, thereby guaranteeing the vibration effect of second voice coil 402, make it not affect acoustic effect, at the same time, since second centering branch 403 is also connected with second diaphragm assembly 401, when second voice coil 402 vibrates, also drive second diaphragm assembly 401 synchronous vibration sound, thereby realize the sound effect of second vibration system 4.

[0071] As shown in FIG. 4-5 and FIG. 7-9, in the embodiment of the utility model, first diaphragm assembly 301 includes first diaphragm 3011 and first vibration plate 3012 arranged at first diaphragm 3011, first diaphragm 3011 includes first fixed part 30111, first fold ring part 30112 and first center part 30113 arranged in turn from outside to inside, first fixed part 30111 can be fixed to shell assembly 1 through bonding process, first center part 30113 is connected with first vibration plate 3012, one end of first voice coil 302 away from first magnetic gap 5 is connected with first vibration plate 3012, thereby realizing the assembly connection of first diaphragm assembly 301 and first diaphragm assembly 301.

[0072] Second diaphragm assembly 401 includes second diaphragm 4011 and second vibration plate 4012 arranged at second diaphragm 4011, second diaphragm 4011 includes second fixed part 40111, second fold ring part 40112 and second center part 40113 arranged in turn from outside to inside, second fixed part 40111 is fixed to second centering branch 403, second center part 40113 is connected with second vibration plate 4012, thereby realizing the assembly connection of second diaphragm assembly 401 and second centering branch 403.

[0073] The second folded ring part 40112 extends in a direction away from the second centering sheet 403, the first folded ring part 30112 and the second folded ring part 40112 have the same recess direction, for the design structure that the second centering sheet 403 is located between the second voice coil 402 and the second diaphragm assembly 401, the second folded ring part 40112 is arranged in a direction away from the second centering sheet 403, so that the second diaphragm assembly 401 can avoid touching the second centering sheet 403 when vibrating, and the sound quality is affected, and the first folded ring part 30112 can be recessed into the shell assembly 1 by arranging the recess direction of the first folded ring part 30112 and the recess direction of the second folded ring part 40112 to be the same, so that the thickness of the double-sided sound emitting unit 100 is reduced, and the double-sided sound emitting unit 100 can be made thinner.

[0074] In addition, the second centering sheet 403 can also be arranged at one end of the second voice coil 402 away from the second diaphragm assembly 401, at this time, the second center part 40113 of the second centering sheet 403 is connected with the second voice coil 402, the second fixed part 40111 is connected with the shell assembly 1, one end of the second voice coil 402 away from the second centering sheet 403 is connected with the second diaphragm assembly 401, and the outer periphery of the second diaphragm assembly 401 is fixed to the shell assembly 1, at this time, the second folded ring part 40112 of the second diaphragm assembly 401 can be recessed into the shell assembly 1, and the first folded ring part 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 emitting unit 100, and the double-sided sound emitting unit 100 can be made thinner.

[0075] As shown in FIGS. 1-5, in some embodiments of the utility model, the shell assembly 1 comprises a first shell 101 and a second shell 102, the first shell 101 and the second shell 102 are arranged correspondingly, the first diaphragm assembly 301 is arranged at one end of the first shell 101 away from the second shell 102, and the second diaphragm assembly 401 is arranged at one end of the second shell 102 away from the first shell 101, so that the shell assembly 1 is divided into the first shell 101 and the second shell 102, and injection molding is facilitated.

[0076] One side of the second shell 102 protrudes from the first shell 101 and forms a wiring part 103, a plurality of wiring terminals 104 in communication with the first voice coil 302 and the second voice coil 402 are arranged on the wiring part 103, and the wiring surfaces of the plurality of wiring terminals 104 are located in the same plane, so that the wiring part 103 is arranged with the plurality of wiring terminals 104, and the wiring surfaces of the plurality of wiring terminals 104 are arranged in the same plane, thereby facilitating wiring.

[0077] As shown in FIG. 1, FIG. 4-FIG. 9, in some embodiments of the utility model, the first side of the first diaphragm assembly 301 away from the first shell 101 is also provided with a front cover 7, the front cover 7 forms a sound hole, the front cover 7 includes a main body part 701 and the mounting part 702 arranged around the main body part 701, the mounting part 702 is connected with the positioning column arranged on the first shell 101, the mounting part 702 can be positioned through the positioning column, after positioning is completed, the front cover 7 is fixed on the first shell 101 by fusing the positioning column, the outer periphery of the first diaphragm assembly 301 is arranged between the first shell 101 and the mounting part 702, since the outer periphery of the first diaphragm assembly 301 is located between the first shell 101 and the mounting part 702, the front cover 7 plays a protective role on the diaphragm.

[0078] In addition, in the embodiment, the side of the front cover 7 away from the first shell 101 is also mounted with a dust screen 8, the dust screen 8 is arranged to reduce the dust in the air into the double-sided sound emitting unit 100, and affect the performance of the double-sided sound emitting unit 100.

[0079] As shown in FIG. 4-FIG. 5 and FIG. 7-FIG. 8, according to some embodiments of the utility model, the double-sided sound emitting unit 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 the sound waves with the same phase outward, in the second working state, the first diaphragm assembly 301 and the second diaphragm assembly 401 radiate the sound waves with opposite phases outward. Therefore, when the double-sided sound emitting unit 100 is applied to a terminal device (such as a mobile phone), when the terminal device is in the external mode, the double-sided sound emitting unit 100 enters the first working state, the first diaphragm assembly 301 and the second diaphragm assembly 401 radiate the sound waves with the same phase outward, and the sound waves of the two sides are superimposed on each other, which can improve the external effect of the terminal device. When the terminal device is in the receiver mode, the double-sided sound emitting unit 100 enters the second working state, the first diaphragm assembly 301 and the second diaphragm assembly 401 radiate the sound waves with opposite phases outward, the sound waves of the two sides are mutually offset in the far field (such as a distance of 20cm-50cm from the human ear), thereby the privacy protection effect of the terminal device during the call can be improved.

[0080] The utility model also proposes an electronic device, the electronic device includes double-sided sound emitting unit 100, the specific structure of double-sided sound emitting unit 100 refers to the preceding embodiment, since the electronic device adopts all the technical solutions of all the preceding embodiments, at least has all the beneficial effects brought by the technical solutions of the preceding embodiments, which will not be repeated here.

[0081] In addition, the double-sided sound emitting unit 100 can also be assembled into a sound emitting module with the shell, and is assembled in the electronic device in the form of the sound emitting module.

[0082] It can be understood that the electronic device can be a mobile phone, a sound, a computer, an earphone, a watch, a television or a tablet computer, etc., which is not limited here.

[0083] It should be understood that the use of these embodiments is only for the purpose of illustrating the present application and is not intended to limit the scope of protection of the present application. In addition, it should also be understood that after reading the technical content of the present application, those skilled in the art can make various modifications, modifications and / or variations to the present application, and all these equivalent forms also fall within the protection scope defined by the appended claims of the present application.

Claims

1. A two-sided sound producing monomer, characterized in that, The application relates to a loudspeaker, which comprises: a shell assembly; a magnetic circuit system connected with the shell assembly, the magnetic circuit system being provided with a first magnetic gap and a second magnetic gap; a first vibration system and a second vibration system arranged on opposite sides of the magnetic circuit system and vibrating in a first direction, the first vibration system comprising a first diaphragm assembly and a first voice coil, the outer periphery of the first diaphragm assembly being fixed to the shell assembly, one end of the first voice coil being connected with the first diaphragm assembly, and the other end of the first voice coil being arranged corresponding to the first magnetic gap, the second vibration system comprising a second diaphragm assembly and a second voice coil, the outer periphery of the second diaphragm assembly being fixed to the shell assembly, one end of the second voice coil being connected with the second diaphragm assembly, and the other end of the second voice coil being arranged corresponding to the second magnetic gap, wherein in the first direction, the projection of the first voice coil is located outside the projection of the second voice coil, the first voice coil and the second voice coil are both formed into square structures, the first voice coil comprises a first side and a second side connected in sequence, the second voice coil comprises 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 dual-sided sound producing monomer of claim 1, wherein: The magnetic circuit system comprises an inner magnetic circuit, an outer magnetic circuit and a magnetic yoke, the magnetic yoke comprises a body part and a bent extension part bent and extended from the body part towards the second vibration system and the inner magnetic circuit respectively, the inner magnetic circuit is connected to one side of the body part away from the first vibration system, the outer magnetic circuit is connected to one side of the bent extension part away from the second vibration system, at least part of the bent extension part extends in the first direction, the first magnetic gap is formed between the bent extension part and the outer magnetic circuit, and the second magnetic gap is formed between the bent extension part and the inner magnetic circuit, and one end of the bent extension part away from the body part is connected with the shell assembly.

3. The dual-sided sound producing monomer of claim 2, wherein: The bent extension part comprises a first connecting part connected with the body part and extending in the first direction, one end of the first connecting part away from the body part extends horizontally in the direction close to the shell assembly to form a second connecting part, the first magnetic gap is formed between the first connecting part and the outer magnetic circuit, and the second magnetic gap is formed between the first connecting part and the inner magnetic circuit, the second connecting part is connected with the shell assembly, and the outer magnetic circuit is connected to the second connecting part.

4. The dual-sided sound producing monomer of claim 3, wherein: The body part, the first connecting part and the second connecting part are formed into an integrally stretch-formed structure.

5. The dual-sided sound producing monomer of claim 3, wherein: The body part is formed into a square structure, the body part comprises a long side and a short side connected in sequence, the first connecting part is two and located on opposite sides of the body part, in 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 connected with the two short sides respectively, L11 / L21>=1.25 and L12 / L22>=1.

05. When the two first connecting portions are connected with the two long sides respectively, L11 / L21≥1.05, L12 / L22≥1.

25.

6. The dual-sided sound producing monomer of claim 3, wherein: The inner magnetic circuit comprises a center magnet and a center magnetic conducting plate, the center magnet is installed on the body part, and the center magnetic conducting plate is installed on the side of the center magnet away from the body part. The outer magnetic circuit comprises an edge magnet and an edge magnetic conducting plate, the edge magnet is connected to the second connecting part, the edge magnetic conducting plate is connected to the side of the edge magnet away from the second connecting part, and the edge magnetic conducting plate is connected to the shell assembly at the end away from the first voice coil.

7. The double-sided sound producing monomer according to any one of claims 1-6, wherein: The first vibration system further comprises a first centering support, the first centering support comprises an inner fixed part, an outer fixed part and an extension part connecting the inner fixed part and the outer fixed part, the inner fixed part is connected to the end of the first voice coil away from the first diaphragm assembly, and the outer fixed part is connected to the shell assembly.

8. The dual-sided sound producing monomer of claim 7, wherein: The second vibration system further comprises a second centering support, the second centering support is located between the second diaphragm assembly and the second voice coil, the second centering support comprises an inner periphery, an outer periphery and a connecting arm connecting the inner periphery and the outer periphery, the opposite sides of the inner periphery are connected to the second voice coil and the second diaphragm assembly respectively, and the opposite sides of the outer periphery are connected to the shell assembly and the second diaphragm assembly respectively.

9. The double-sided sound producing monomer according to any one of claims 1-6, wherein: The double-sided sound production 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 outward, and in the second working state, the first diaphragm assembly and the second diaphragm assembly radiate sound waves with opposite phases outward.

10. An electronic device, comprising: The electronic device comprises the double-sided sound production unit according to any one of claims 1-9.

Images