Multi-magnet and multi-voice coil suspension flat plate unit

Abstract

The utility model belongs to the technical field of earphone panel units, and particularly relates to a multi-magnet multi-voice coil suspension panel unit, which aims to improve the transduction efficiency and enhance the sound performance of an earphone, and comprises a shell, a unit upper magnetic group, a unit lower magnetic group and a conductive voice coil assembly, the unit upper magnetic group, the unit lower magnetic group and the conductive voice coil assembly are sequentially overlapped and assembled and are arranged in the shell; the unit upper magnetic group comprises a plurality of annular upper magnets with different diameters, the annular upper magnets are arranged in a concentric circle, the unit lower magnetic group comprises a plurality of annular lower magnets with different diameters, the annular lower magnets are arranged in a concentric circle, the number of the annular lower magnets and the number of the annular upper magnets are m, and the annular lower magnets and the annular upper magnets are oppositely arranged in a one-to-one mode; the conductive voice coil assembly comprises a diaphragm assembly and a plurality of annular voice coil assemblies, the plurality of annular voice coil assemblies are arranged in a concentric circle, the number of the annular voice coil assemblies is m-1, and each annular voice coil assembly is arranged at the gap of every two adjacent annular lower magnets. The device has the advantage of high transduction efficiency.

Description

Technical Field

[0001] The utility model belongs to the technical field of earphone flat panel units, in particular to a multi-magnet multi-voice coil suspension flat panel unit. Background Art

[0002] The planar unit of the earphone is one of the most critical components in the earphone.

[0003] In conventional headphones, the planar unit is limited by the magnetic flux density, which limits the transducer efficiency and driving force of the headphones, which in turn affects the sound performance of the headphones. It also affects the battery life and comfort of the headphones.

[0004] Therefore, it is necessary to optimize the flat unit of the earphones to improve its transducer efficiency and enhance the sound performance of the earphones. Utility Model Content

[0005] In view of the technical problems existing in the background technology, the utility model provides a multi-magnet multi-voice coil suspended flat panel unit, which can improve its energy conversion efficiency and enhance the sound performance of the earphone.

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

[0007] A multi-magnet multi-voice coil suspension flat panel unit, comprising a housing, an upper magnetic group of the unit, a lower magnetic group of the unit and a conductive voice coil assembly;

[0008] The upper magnetic group of the unit, the lower magnetic group of the unit and the conductive voice coil assembly are sequentially overlapped, assembled and placed in the housing;

[0009] The unit upper magnetic group includes a plurality of annular upper magnets with different diameters, and the plurality of annular upper magnets are arranged in concentric circles; the unit lower magnetic group includes a plurality of annular lower magnets with different diameters, and the plurality of annular lower magnets are arranged in concentric circles; the number of the annular lower magnets and the annular upper magnets is m and they are arranged one-to-one relative to each other;

[0010] The conductive voice coil assembly includes a diaphragm assembly and a plurality of annular voice coil assemblies, wherein the plurality of annular voice coil assemblies are arranged in concentric circles and the number is m-1, and each of the annular voice coil assemblies is respectively arranged at the gap between every two adjacent annular lower magnets, and the width of the conductive voice coil assembly is greater than the width of the gap.

[0011] Preferably, the bottom and top of the annular upper magnet have different polarities, and the polarities of every two adjacent annular upper magnets are arranged in opposite directions.

[0012] Preferably, the bottom and top of the annular lower magnet have different polarities, and the polarities of every two adjacent annular lower magnets are arranged oppositely; and the polarities of the oppositely arranged annular lower magnets and annular upper magnets are the same.

[0013] Preferably, the inner ring and outer ring of the annular voice coil assembly have different polarities; the polarity arrangement of the annular voice coil assembly is: the polarity of the inner ring is the same as the polarity of the bottom of the annular upper magnet on one side of the inner ring, and the polarity of the outer ring is the same as the polarity of the bottom of the annular upper magnet on one side of the outer ring.

[0014] Preferably, the diaphragm assembly comprises a rigid sheet and a double-suspension diaphragm; the rigid sheet, the double-suspension diaphragm and the annular voice coil assembly are overlapped and assembled in sequence, and the rigid sheet is located on a side close to the annular upper magnet.

[0015] Preferably, the housing comprises a unit upper cover and a unit lower cover, and the unit upper cover and the unit lower cover are detachably connected.

[0016] Preferably, the unit upper cover and the unit lower cover are connected by threads.

[0017] Preferably, an inner and outer unit bracket is provided between the unit lower magnetic group and the conductive voice coil assembly.

[0018] Preferably, the annular voice coil assembly is a planar ring formed by winding voice coil wires in layers.

[0019] The utility model has the following advantages and beneficial effects:

[0020] In the utility model, a concentric ring magnet and voice coil structure is adopted, which increases the effective length of the voice coil and the magnetic flux density of the magnetic receiving surface, thereby improving the energy conversion efficiency and strengthening the driving force;

[0021] In the present invention, the design of multiple voice coils also reduces the overall suspension mass of the unit, further improving the overall energy conversion efficiency of the unit;

[0022] In the utility model, the coiled arrangement of the voice coil increases the effective length of the voice coil and also reduces the impedance, which has significant advantages over the traditional etching voice coil process;

[0023] The polarity arrangement of the utility model solves the problems of small vibration area of ​​the diaphragm and insufficient coverage area of ​​the magnetic field. BRIEF DESCRIPTION OF THE DRAWINGS

[0024] Figure 1 An exploded view of the multi-magnet multi-voice coil suspension flat panel unit provided by the utility model;

[0025] Figure 2A schematic diagram of the positional relationship of the three upper magnetic groups of the units, the three lower magnetic groups of the units and the two annular voice coil assemblies provided in Example 1;

[0026] Figure 3 for Figure 2 An exploded diagram of the three-unit upper magnetic group, the three-unit lower magnetic group and the two annular voice coil assemblies after application;

[0027] Figure 4 A schematic diagram of the positional relationship of the four upper magnetic groups of the units, the four lower magnetic groups of the units and the three annular voice coil assemblies provided in Example 1;

[0028] Figure 5 It is a schematic diagram of the structure of two adjacent annular voice coil assemblies;

[0029] Icon: 101-unit upper cover, 102-unit upper magnetic group, 103-flexible film, 104-double suspension diaphragm, 105-ring voice coil assembly, 106-inner and outer unit brackets, 107-unit lower magnetic group, 108-unit lower cover, 11-conductive voice coil assembly. DETAILED DESCRIPTION

[0030] 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.

[0031] 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.

[0032] Example 1

[0033] A multi-magnet multi-voice coil suspended flat panel unit, see Figure 1 , including a housing, an upper magnetic group 102 of the unit, a lower magnetic group 107 of the unit and a conductive voice coil assembly 11;

[0034] The upper magnetic group 102 of the unit, the lower magnetic group 107 of the unit and the conductive voice coil assembly 11 are sequentially overlapped, assembled and placed in the housing;

[0035] The unit upper magnetic group 102 includes a plurality of annular upper magnets with different diameters, and the plurality of annular upper magnets are arranged in concentric circles. The unit lower magnetic group 107 includes a plurality of annular lower magnets with different diameters, and the plurality of annular lower magnets are arranged in concentric circles. The number of the annular lower magnets and the annular upper magnets is m and they are arranged one-to-one.

[0036] The conductive voice coil assembly 11 includes a diaphragm assembly and a plurality of annular voice coil assemblies 105. The plurality of annular voice coil assemblies 105 are arranged in concentric circles, and the number is m-1. Each of the annular voice coil assemblies 105 is respectively arranged at the gap between every two adjacent annular lower magnets. The width of the conductive voice coil assembly 11 is greater than the width of the gap.

[0037] In this embodiment, the bottom and top of the annular upper magnet have different polarities, and the polarities of every two adjacent annular upper magnets are arranged in opposite directions.

[0038] Furthermore, the bottom and top of the annular lower magnet have different polarities, and the polarities of every two adjacent annular lower magnets are arranged oppositely; in the relatively arranged annular lower magnet and the annular upper magnet, the polarities of the surfaces facing each other are the same.

[0039] On the other hand, the inner ring and outer ring of the annular voice coil assembly 105 have different polarities; the polarity arrangement of the annular voice coil assembly 105 is as follows: the polarity of the inner ring is the same as the polarity of the bottom of the annular upper magnet on one side of the inner ring, and the polarity of the outer ring is the same as the polarity of the bottom of the annular upper magnet on one side of the outer ring.

[0040] The examples of the three upper magnetic groups 102, three lower magnetic groups 107 and two annular voice coil assemblies 105 provided in this embodiment are shown in FIG. Figure 2, we number the three upper magnetic groups 102, the three lower magnetic groups 107 and the two annular voice coil assemblies 105 respectively, all of which are numbered sequentially from 1 from the inner circle to the outer circle. It can be seen that the negative poles of the upper magnetic group 102 of the No. 1 unit and the lower magnetic group 107 of the No. 1 unit are opposite to each other, and the adjacent polarities are arranged in opposite directions, so the positive poles of the upper magnetic group 102 of the No. 2 unit and the lower magnetic group 107 of the No. 2 unit are opposite to each other, and similarly, the negative poles of the upper magnetic group 102 of the No. 3 unit and the lower magnetic group 107 of the No. 3 unit are opposite to each other. The position of the No. 1 annular voice coil assembly 105 corresponds to the gap between the upper magnetic group 102 of unit No. 1 and the upper magnetic group 102 of unit No. 2 (also the gap between the lower magnetic group 107 of unit No. 2 and the lower magnetic group 107 of unit No. 2). Since the width of the conductive voice coil assembly 11 is greater than the width of the gap, the inner ring side of the No. 1 annular voice coil assembly 105 will extend between the upper magnetic group 102 of unit No. 1 and the lower magnetic group 107 of unit No. 1, and the polarity of the surface opposite to the upper magnetic group 102 of unit No. 1 and the lower magnetic group of unit No. 1 is the same as the negative pole, and the outer ring side of the No. 1 annular voice coil assembly 105 will extend between the upper magnetic group 102 of unit No. 2 and the lower magnetic group 107 of unit No. 2, and the polarity of the surface opposite to the upper magnetic group 102 of unit No. 2 and the lower magnetic group of unit No. 2 is the same as the positive pole. The same is true for the No. 2 annular voice coil assembly 105, except that the position of the No. 2 annular voice coil assembly 105 corresponds to the gap between the No. 2 unit upper magnetic group 102 and the No. 3 unit upper magnetic group 102. The exploded diagram after the application of the three unit upper magnetic groups 102, the three unit lower magnetic groups 107 and the two annular voice coil assemblies 105 can be referred to. Figure 3 .

[0041] The examples of the four upper magnetic groups 102, four lower magnetic groups 107 and three annular voice coil assemblies 105 provided in this embodiment are shown in FIG. Figure 4 , its arrangement principle and Figure 2 same.

[0042] Based on the number, positional relationship and polarity arrangement of the upper magnetic group 102, the lower magnetic group 107 and the annular voice coil assembly 105 of the unit in this embodiment, for example, the upper magnetic group 102 and the lower magnetic group 107 of the unit are both concentric annular magnets, which can effectively enhance the magnetic flux density at the coil part and effectively improve the overall energy conversion efficiency of the unit. The polarity design of the coil of the annular voice coil assembly 105 makes the positive and negative polarities of the external inputs of two adjacent coils opposite, which not only solves the problems of small diaphragm vibration area and insufficient magnetic field coverage area, but also the design of multiple voice coils effectively reduces the overall suspension mass of the unit, improves the energy conversion efficiency, and improves the transient characteristics. The design of multiple annular voice coil assemblies 105 also reduces the overall suspension mass of the unit, further improving the overall energy conversion efficiency of the unit.

[0043] As a preferred solution of this embodiment, the annular voice coil assembly 105 is a planar ring formed by winding the voice coil wire layer by layer. This setting increases the effective length of the voice coil and reduces the impedance, which has significant advantages over the traditional etching voice coil process. Figure 5 .

[0044] Example 2

[0045] This embodiment is based on the technical solution of Embodiment 1 and further explains some components.

[0046] In this embodiment, see Figure 1 The diaphragm assembly includes a rigid sheet 103 and a double-suspended diaphragm 104; the rigid sheet 103, the double-suspended diaphragm 104 and the annular voice coil assembly 105 are sequentially overlapped and assembled, and the rigid sheet 103 is located on the side close to the annular upper magnet. The double-suspended diaphragm 104 design and the covering rigid sheet 103 work together to improve the support and uniform force of the diaphragm, significantly reduce split vibration and nonlinear distortion, and ensure the stability of the diaphragm when the amplitude output is large.

[0047] Further, the housing includes a unit upper cover 101 and a unit lower cover 108, and the unit upper cover 101 and the unit lower cover 108 are detachably connected. It is particularly noted that the unit upper magnetic group 102 and the unit lower magnetic group 107 can be fixed on the unit upper cover 101 and the unit lower cover 108, respectively. And the unit upper cover 101 and the unit lower cover 108 are both made of non-magnetic materials, and the use of such materials effectively avoids the problem of magnetic leakage.

[0048] As a preferred solution, the unit upper cover 101 and the unit lower cover 108 are connected by threads, which can resist the strong repulsive force generated by the upper and lower magnetic circuits, ensure the stability and durability of the structure, and effectively improve the product yield and reduce production costs.

[0049] In addition, an inner and outer unit bracket 106 is provided between the unit lower magnetic group 107 and the conductive voice coil assembly 11 .

[0050] 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 multi-magnet multi-voice coil suspension flat panel unit, characterized in that : comprising a housing, an upper magnetic group (102) of the unit, a lower magnetic group (107) of the unit and a conductive voice coil assembly (11); The unit upper magnetic group (102), the unit lower magnetic group (107) and the conductive voice coil assembly (11) are sequentially overlapped and assembled and placed in the housing; The unit upper magnetic group (102) comprises a plurality of annular upper magnets with different diameters, and the plurality of annular upper magnets are arranged in concentric circles; the unit lower magnetic group (107) comprises a plurality of annular lower magnets with different diameters, and the plurality of annular lower magnets are arranged in concentric circles; the number of the annular lower magnets and the number of the annular upper magnets are both m, and they are arranged one-to-one relative to each other; The conductive voice coil assembly (11) comprises a diaphragm assembly and a plurality of annular voice coil assemblies (105), wherein the plurality of annular voice coil assemblies (105) are arranged in concentric circles and the number of the annular voice coil assemblies is m-1, and each of the annular voice coil assemblies (105) is respectively arranged at a gap between every two adjacent annular lower magnets, and the width of the conductive voice coil assembly (11) is greater than the width of the gap.

2. The multi-magnet multi-voice coil suspension flat panel unit according to claim 1, characterized in that: The bottom and top of the annular upper magnet have different polarities, and the polarities of every two adjacent annular upper magnets are arranged in opposite directions.

3. The multi-magnet multi-voice coil suspension flat panel unit according to claim 2, characterized in that: The bottom and top of the annular lower magnet have different polarities, and the polarities of every two adjacent annular lower magnets are arranged in opposite directions; The faces of the relatively arranged annular lower magnet and the relatively arranged annular upper magnet have the same polarity.

4. The multi-magnet multi-voice coil suspension flat panel unit according to claim 3, characterized in that: The inner ring and outer ring of the annular voice coil assembly (105) have different polarities; the polarity arrangement of the annular voice coil assembly (105) is as follows: the polarity of the inner ring is the same as the polarity of the bottom of the annular upper magnet on one side of the inner ring, and the polarity of the outer ring is the same as the polarity of the bottom of the annular upper magnet on one side of the outer ring.

5. The multi-magnet multi-voice coil suspension flat panel unit according to claim 1, characterized in that: The diaphragm assembly comprises a rigid sheet (103) and a double-suspended diaphragm (104); the rigid sheet (103), the double-suspended diaphragm (104) and the annular voice coil assembly (105) are sequentially overlapped and assembled, and the rigid sheet (103) is located on a side close to the annular upper magnet.

6. The multi-magnet multi-voice coil suspension flat panel unit according to claim 1, characterized in that: The housing comprises a unit upper cover (101) and a unit lower cover (108), and the unit upper cover (101) and the unit lower cover (108) are detachably connected.

7. The multi-magnet multi-voice coil suspension flat panel unit according to claim 6, characterized in that: The unit upper cover (101) and the unit lower cover (108) are connected via threads.

8. The multi-magnet multi-voice coil suspension flat panel unit according to claim 1, characterized in that: An inner and outer unit bracket (106) is provided between the unit lower magnetic group (107) and the conductive voice coil assembly (11).

9. The multi-magnet multi-voice coil suspension flat panel unit according to claim 1, characterized in that: The annular voice coil assembly (105) is a planar ring formed by winding voice coil wires layer by layer.

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