Single-sided magnetic double-dangling-edge flat plate unit

Abstract

The utility model belongs to the technical field of panel units, and particularly relates to a single-sided magnetic double-dangling-edge panel unit, which aims to solve the problems of narrow bandwidth and high distortion, optimize compactness and consistency and guarantee tone quality, and comprises a shell, a panel unit assembly and a detachably arranged transverse magnet, the flat plate unit assembly and the transverse magnet are arranged in the shell; the transverse magnet is arranged at the magnetic circuit structure of the panel unit assembly, and the bottom surface of the transverse magnet and the bottom surface of the magnetic circuit structure of the panel unit assembly are arranged at the bottom of the inner wall of the shell. The utility model has the advantages that the bandwidth is improved, the distortion is low, the cost is low, the production difficulty and the production process are reduced, and the consistency and the compactness are improved.

Description

Technical Field

[0001] The utility model belongs to the technical field of flat plate units, in particular to a single-sided magnetic double-hanging edge flat plate unit. Background Art

[0002] Although the current headphone market is dominated by dynamic and balanced armature headphones, with the advancement of technology, the pursuit of high-end sound quality is becoming a new trend among consumers. Modern users are not only satisfied with the basic functions of headphones, but also pay more attention to the excellent performance of sound quality. Driven by this trend, planar magnetic speaker units have gradually won the favor of the market with their excellent sound quality and have become the first choice of more and more sound quality enthusiasts.

[0003] Most of the popular in-ear miniature planar magnetic speaker units on the market currently use a direct suspension diaphragm design. This design will result in a higher resonant frequency (f0), which makes its operating frequency range biased towards high frequencies. This feature limits the application scope of such speaker units. In addition, the design of a single suspension edge will also affect its performance at high frequencies, and also limit its sound quality performance and breadth of application, so it is particularly important to improve the suspension mechanism of in-ear miniature planar magnetic speakers. At the same time, the existing dual-magnetic group planar magnetic speaker design also has limitations in volume, and it is difficult to adapt to smaller smart wearable devices. In addition, during the production and assembly process of the dual-magnetic group planar magnetic speaker, due to the large repulsive force between the opposing magnets, this increases the difficulty of assembly and easily leads to inconsistency problems in its performance, so the improvement of the magnetic circuit has also become an important direction for optimizing the design of in-ear miniature planar magnetic speakers, so as to achieve a more compact and stable product design while maintaining the sound quality.

[0004] Therefore, in order to optimize and improve the current in-ear micro planar magnetic speaker unit to cater to the trend of miniaturization of smart wearable devices, its structure and magnetic circuit must be completely optimized and redesigned to solve the problems of narrow bandwidth and high distortion while optimizing compactness and consistency and ensuring sound quality. Utility Model Content

[0005] In view of the technical problems existing in the background technology, the utility model provides a single-sided magnetic double-suspended edge flat panel unit, which can not only solve the problems of narrow bandwidth and high distortion, but also optimize compactness and consistency and ensure sound quality.

[0006] In order to achieve the above purpose, the technical solution provided by the utility model is:

[0007] The utility model provides a single-sided magnetic double-hanging edge flat plate unit, comprising a housing, a flat plate unit assembly and a detachably arranged transverse magnet;

[0008] The flat unit assembly and the transverse magnet are arranged in the outer shell; the transverse magnet is arranged at the magnetic circuit structure of the flat unit assembly, and the bottom surface of the transverse magnet and the bottom surface of the magnetic circuit structure of the flat unit assembly are both arranged at the bottom of the inner wall of the outer shell.

[0009] Preferably, the magnetic circuit structure includes an annular magnetic circuit and a circular magnetic circuit; the annular magnetic circuit is arranged around the circular magnetic circuit, and there is a magnetic circuit gap between the annular magnetic circuit and the circular magnetic circuit, and the transverse magnet is arranged in the magnetic circuit gap.

[0010] Preferably, the transverse magnet is annular and surrounds the circular magnetic circuit and is arranged in the magnetic circuit gap.

[0011] Preferably, the side of the annular magnetic circuit facing the top of the inner wall of the shell is of the first polarity, and the side of the annular magnetic circuit facing the bottom of the inner wall of the shell is of the second polarity;

[0012] The side of the circular magnetic circuit facing the top of the inner wall of the shell is of the second polarity, and the side of the circular magnetic circuit facing the bottom of the inner wall of the shell is of the first polarity;

[0013] The outer ring side of the transverse magnet facing the annular magnetic circuit has a first polarity, and the inner ring side of the transverse magnet facing the circular magnetic circuit has a second polarity.

[0014] Preferably, the thickness of the transverse magnet is not greater than the thickness of the magnetic circuit structure.

[0015] Preferably, the flat panel unit assembly further includes a double suspension diaphragm, a voice coil and a diaphragm bracket;

[0016] The double-suspension diaphragm, the voice coil, the diaphragm support and the magnetic circuit structure are stacked together in sequence, and the double-suspension diaphragm is close to the top of the inner wall of the shell.

[0017] Preferably, a rigid sheet is arranged between the double-cantilever diaphragm and the top of the inner wall of the housing.

[0018] Preferably, the wiring in the double-cantilever diaphragm is a ring shape formed by winding wires.

[0019] Preferably, a magnetic conductive plate is also detachably provided, and the magnetic conductive plate is provided at the bottom of the exterior of the housing.

[0020] Preferably, the housing includes a lower shell, the flat panel unit assembly and the detachably arranged transverse magnet are arranged in the lower shell, and the magnetic conductive plate is arranged on the back side of the lower shell.

[0021] The utility model has the following advantages and beneficial effects:

[0022] The utility model adopts a single-sided magnetic design, and realizes efficient distribution of the magnetic field by precisely calculating the magnetic induction intensity and magnetic flux density of the coil on the magnetic surface, thereby reducing the use of magnets.

[0023] The utility model adopts a double suspension diaphragm, which reduces the distortion of the single-magnetic group planar magnetic speaker, reduces the split vibration and thus solves the problem of narrow bandwidth;

[0024] In the utility model, the overall effectiveness of the magnetic field is enhanced by the transverse magnet, and the BL value can be precisely controlled by fine-tuning its thickness, so that the sensitivity of the unit can be adjusted according to the requirements of different products;

[0025] The utility model can reduce costs, reduce production difficulty and production processes, and improve consistency;

[0026] The design of the utility model is conducive to reducing the size of the flat-panel unit, ensuring its compatibility with most earphone cavities on the market, while taking into account the performance of the flat-panel unit. BRIEF DESCRIPTION OF THE DRAWINGS

[0027] Figure 1 An exploded schematic diagram of the structure of a single-sided magnetic double-hanging edge flat plate unit provided in Example 1 of the utility model;

[0028] Figure 2 A schematic diagram of polarity settings of the transverse magnet and magnetic circuit structure provided in Example 1 of the utility model;

[0029] Figure 3 This is a schematic diagram of magnetic induction intensity of the first case in Example 2 of the utility model;

[0030] Figure 4 This is a schematic diagram of magnetic induction intensity of the second case in Example 2 of the present utility model;

[0031] Figure 5 This is a schematic diagram of magnetic induction intensity of the third case in Example 2 of the present utility model;

[0032] Figure 6 This is a schematic diagram of magnetic induction intensity of the fourth case in Example 2 of the utility model;

[0033] Figure 7 This is a schematic diagram of magnetic induction intensity of the fifth case in Example 2 of the utility model;

[0034] Figure 8 This is a schematic diagram of the wiring in the double-cantilever diaphragm in Example 1 of the utility model;

[0035] Icons: 101-rigid sheet, 102-double suspension diaphragm, 103-voice coil, 104-diaphragm bracket, 1051-circular magnetic circuit, 1052-annular magnetic circuit, 105-magnetic circuit structure, 106-transverse magnet, 107-lower shell, 108-magnetic plate. DETAILED DESCRIPTION

[0036] In order to make the purpose, technical solutions and advantages of the embodiments of the utility model clearer, the technical solutions in the embodiments of the utility model will be clearly and completely described below in conjunction with the drawings 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.

[0037] Therefore, the following detailed description of the embodiments of the present invention provided in the accompanying drawings is not intended to limit the scope of the present invention to be protected, but merely represents selected embodiments of the present invention. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the present invention.

[0038] Example 1

[0039] This embodiment provides a single-sided magnetic double-hanging edge flat plate unit, see Figure 1 , including a housing, a flat unit assembly and a detachably arranged transverse magnet 106;

[0040] The flat unit assembly and the transverse magnet 106 are arranged in the outer shell; the transverse magnet 106 is arranged at the magnetic circuit structure 105 of the flat unit assembly, and the bottom surface of the transverse magnet 106 and the bottom surface of the magnetic circuit structure 105 of the flat unit assembly are both arranged at the bottom of the inner wall of the outer shell.

[0041] In this embodiment, the magnetic circuit structure 105 includes an annular magnetic circuit 1052 and a circular magnetic circuit 1051; the annular magnetic circuit 1052 is arranged around the circular magnetic circuit 1051, and there is a magnetic circuit gap between the annular magnetic circuit 1052 and the circular magnetic circuit 1051, and the transverse magnet 106 is arranged in the magnetic circuit gap.

[0042] Furthermore, the transverse magnet 106 is annular and surrounds the circular magnetic circuit 1051 and is arranged in the magnetic circuit gap.

[0043] In addition, the side of the annular magnetic circuit 1052 facing the top of the inner wall of the shell is of the first polarity, and the side facing the bottom of the inner wall of the shell is of the second polarity;

[0044] The side of the circular magnetic circuit 1051 facing the top of the inner wall of the shell is of the second polarity, and the side facing the bottom of the inner wall of the shell is of the first polarity;

[0045] The outer circle side of the transverse magnet 106 facing the annular magnetic circuit 1052 has a first polarity, and the inner circle side of the transverse magnet 106 facing the circular magnetic circuit 1051 has a second polarity.

[0046] A polarity reference example can be found at Figure 2 , Figure 2 In the setting method in , the first polarity is the N pole and the second polarity is the S pole.

[0047] As a preferred solution, the thickness of the transverse magnet 106 is not greater than the thickness of the magnetic circuit structure 105. Specifically, the thickness setting range is 0-h1, where h1 is the thickness of the magnetic circuit structure 105. When the thickness of the transverse magnet 106 is 0, it means that the transverse magnet 106 is removed and the structure is not set. The main function of the transverse magnet is to enhance the overall effectiveness of the magnetic field. The BL value can also be precisely controlled by fine-tuning its thickness, so that the sensitivity of the unit can be adjusted according to the requirements of different products.

[0048] On the other hand, the flat unit assembly further includes a double suspension diaphragm 102, a voice coil 103 and a diaphragm support 104;

[0049] The double-suspension diaphragm 102 , the voice coil 103 , the diaphragm support 104 and the magnetic circuit structure 105 are stacked together in sequence, and the double-suspension diaphragm 102 is close to the top of the inner wall of the housing.

[0050] As a preferred solution, a rigid sheet 101 is provided between the double suspension diaphragm 102 and the top of the inner wall of the housing. On the other hand, the wiring in the double suspension diaphragm 102 is a ring formed by winding wires. The schematic diagram of the wiring can be found in Figure 8 The wire material can be copper, silver, aluminum or CCAW, etc.

[0051] In this embodiment, a magnetic conductive plate 108 can be detachably provided, and the magnetic conductive plate 108 is provided at the bottom of the outer shell. The magnetic conductive plate 108 can enhance the overall efficiency of the magnetic circuit and improve the overall energy conversion efficiency when assembled; and when it is not installed, it helps to reduce the production and assembly costs and optimize the economic benefits, so it can be installed according to the situation.

[0052] Finally, the housing includes a lower shell 107, the flat plate unit assembly and the detachably arranged transverse magnet 106 are arranged in the lower shell 107, and the magnetic conductive plate 108 is arranged on the back of the lower shell 107. It is particularly noted here that an upper shell can be added and assembled with the lower shell 107 to cover the flat plate unit assembly and the detachably arranged transverse magnet 106, so as to prevent dust.

[0053] In general, the treble performance of the diaphragm with a single suspension edge is poor, and the diaphragm with a single suspension edge only has treble performance. The design of the double suspension edge diaphragm 102 in this embodiment can first reduce distortion, and can also reduce split vibration and thus solve the problem of narrow bandwidth of traditional diaphragms. The double suspension edge diaphragm 102 is a structure with two circles of folded rings. On the other hand, it aims to improve efficiency and reduce volume size, and can also reduce costs, reduce production difficulty and production processes, and improve consistency. The flat unit of this embodiment is a single-sided magnetic design. This design optimizes the magnetic field distribution, reduces the amount of magnets used, thereby reducing the thickness of the unit and improving compatibility with a variety of headphones. In addition, the equipped transverse magnet 106 allows the user to accurately adjust the BL value of the unit by changing its thickness, and flexibly adapt to the sensitivity requirements of different products. The double suspension edge diaphragm 102 structure ensures that the vibration area is evenly stressed, reduces split vibration, significantly reduces nonlinear distortion, and ensures the clarity and purity of the sound. Finally, a magnetic conductive plate 108 is provided as an optional option. When the magnetic conductive plate 108 is installed, the BL value of the magnetic circuit can be further enhanced, thereby improving the energy conversion efficiency. Choosing not to install the magnetic conductive plate 108 can help reduce production and assembly costs, optimize economic benefits, and meet the selection needs of different users between performance and cost.

[0054] Therefore, the design of this embodiment not only solves the distortion problem of the single-magnet group planar magnetic speaker, but also solves the volume limitation of the dual-magnet group planar magnetic speaker, realizing a flat-panel unit with low distortion, high integration, low cost, improved transducer efficiency and guaranteed consistency in performance.

[0055] Example 2

[0056] This embodiment is based on the technical solution of Embodiment 1, and mainly further explains the thickness of the transverse magnet.

[0057] As a first case of this embodiment, the transverse magnet 106 may not be installed. The magnetic induction intensity in this case can be referred to Figure 3 .

[0058] As a second example of this embodiment, the thickness of the transverse magnet 106 is 25% of the thickness of the magnetic circuit structure 105. The magnetic induction intensity in this case can be referred to Figure 4 .

[0059] As a third example of this embodiment, the thickness of the transverse magnet 106 is 50% of the thickness of the magnetic circuit structure 105. The magnetic induction intensity in this case can be referred to Figure 5 .

[0060] As a fourth example of this embodiment, the thickness of the transverse magnet 106 is 75% of the thickness of the magnetic circuit structure 105. The magnetic induction intensity in this case can be referred to Figure 6 .

[0061] As a fifth example of this embodiment, the thickness of the transverse magnet 106 is 100% of the thickness of the magnetic circuit structure 105. The magnetic induction intensity in this case can be referred to Figure 7 .

[0062] It can be seen from the above cases that the greater the thickness of the transverse magnet 106, the greater the overall trend of the value of the magnetic flux density modulus, that is, the stronger the magnetic induction intensity.

[0063] The above are only preferred embodiments of the present invention and are not intended to limit the present invention. For those skilled in the art, the present invention may be subject to various modifications and variations. Any modification, equivalent replacement, improvement, etc. made within the spirit and principle of the present invention shall be included in the protection scope of the present invention.

Claims

1. A single-sided magnetic double-hanging edge flat plate unit, characterized in that : comprising a housing, a flat unit assembly and a detachably arranged transverse magnet (106); The flat unit assembly and the transverse magnet (106) are arranged in the shell; the transverse magnet (106) is arranged at the magnetic circuit structure (105) of the flat unit assembly, and the bottom surface of the transverse magnet (106) and the bottom surface of the magnetic circuit structure (105) of the flat unit assembly are both arranged at the bottom of the inner wall of the shell.

2. The single-sided magnetic double-cantilevered flat plate unit according to claim 1, characterized in that: The magnetic circuit structure (105) comprises an annular magnetic circuit (1052) and a circular magnetic circuit (1051); the annular magnetic circuit (1052) is arranged around the circular magnetic circuit (1051), and a magnetic circuit gap is provided between the annular magnetic circuit (1052) and the circular magnetic circuit (1051), and the transverse magnet (106) is arranged in the magnetic circuit gap.

3. The single-sided magnetic double-cantilevered flat plate unit according to claim 2, characterized in that: The transverse magnet (106) is annular and surrounds the circular magnetic circuit (1051) and is arranged in the magnetic circuit gap.

4. The single-sided magnetic double-cantilevered flat plate unit according to claim 3, characterized in that: The side of the annular magnetic circuit (1052) facing the top of the inner wall of the shell is of the first polarity, and the side of the annular magnetic circuit (1052) facing the bottom of the inner wall of the shell is of the second polarity; The side of the circular magnetic circuit (1051) facing the top of the inner wall of the shell is of the second polarity, and the side of the circular magnetic circuit (1051) facing the bottom of the inner wall of the shell is of the first polarity; The outer ring side of the transverse magnet (106) facing the annular magnetic circuit (1052) has a first polarity, and the inner ring side of the transverse magnet (106) facing the circular magnetic circuit (1051) has a second polarity.

5. The single-sided magnetic double-cantilevered flat plate unit according to claim 4, characterized in that: The thickness of the transverse magnet (106) is not greater than the thickness of the magnetic circuit structure (105).

6. The single-sided magnetic double-cantilevered flat plate unit according to claim 1, characterized in that: The flat panel unit assembly also includes a double-suspended diaphragm (102), a voice coil (103) and a diaphragm support (104); The double-suspension diaphragm (102), the voice coil (103), the diaphragm support (104) and the magnetic circuit structure (105) are stacked together in sequence, and the double-suspension diaphragm (102) is close to the top of the inner wall of the shell.

7. The single-sided magnetic double-cantilevered flat plate unit according to claim 6, characterized in that: A rigid sheet (101) is arranged between the double-suspended edge diaphragm (102) and the top of the inner wall of the housing.

8. The single-sided magnetic double-cantilevered flat plate unit according to claim 7, characterized in that: The wiring in the double-cantilever diaphragm (102) is in a ring shape formed by winding wires.

9. The single-sided magnetic double-cantilevered flat plate unit according to claim 1, characterized in that: A magnetic conductive plate (108) is also detachably provided, and the magnetic conductive plate (108) is arranged at the bottom of the exterior of the housing.

10. The single-sided magnetic double-cantilevered flat plate unit according to claim 9, characterized in that: The housing comprises a lower shell (107), the flat panel unit assembly and the detachably arranged transverse magnet (106) are arranged in the lower shell (107), and the magnetic conductive plate (108) is arranged on the back side of the lower shell (107).

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