Micro-speaker

Abstract

The utility model discloses a micro loudspeaker, including yoke, side magnetic structure, center huasi, voice coil, two magnetic conductive plates and two groups of vibration components, be equipped with the window on the yoke, the opposite two sides of yoke all are equipped with two groups of side magnetic structure, and two groups of side magnetic structure are oppositely arranged and are located the two sides of window in the same face of yoke, one magnetic conductive plate cover is established on two groups of side magnetic structure in the yoke one side, and another magnetic conductive plate cover is established on two groups of side magnetic structure in the yoke other side, center huasi is located in the window, and the opposite two sides of center huasi are equipped with center magnetic steel respectively, and the magnetic gap is formed between center magnetic steel and side magnetic structure, vibration component includes the diaphragm component and skeleton that link to each other, and the diaphragm component whole presents ring frame shape, and the diaphragm component is set up one to one with magnetic conductive plate, and the inner edge of diaphragm component is connected magnetic conductive plate, the upper portion of voice coil is connected the skeleton in the yoke above, and the lower portion of voice coil is connected the skeleton in the yoke below. The micro loudspeaker structure is novel, and the acoustic performance is good.

Description

Technical Field

[0001] This utility model relates to the field of electroacoustic converter technology, and in particular to a miniature loudspeaker. Background Technology

[0002] Miniature speakers are widely used in portable electronic devices such as mobile phones, laptops, and hearing aids. With the rapid development of these portable electronic devices, people have higher and higher requirements for the miniature speakers used in them. How to improve the acoustic performance of miniature speakers in a limited space has always been a research direction for practitioners. Utility Model Content

[0003] The technical problem solved by this utility model is to provide a novel miniature loudspeaker with good acoustic performance.

[0004] To solve the above-mentioned technical problems, the technical solution adopted by this utility model is: a miniature loudspeaker, comprising:

[0005] A yoke, wherein the yoke is provided with a window;

[0006] The yoke has two sets of side magnetic structures on its two opposite sides. The two sets of side magnetic structures on the same side of the yoke are arranged opposite each other and are located on both sides of the window.

[0007] Two magnetic plates, one of which covers the two sets of side magnetic structures on one side of the yoke, and the other of which covers the two sets of side magnetic structures on the other side of the yoke;

[0008] A central washer is located in the window. A central magnet is provided on two opposite sides of the central washer. The central magnet located above the central washer is connected to a magnetic plate, and the central magnet located below the central washer is connected to another magnetic plate. A magnetic gap is formed between the central magnet and the side magnetic structure.

[0009] Two sets of vibration components, each vibration component including a connected diaphragm component and a frame, the diaphragm component being generally ring-shaped, the diaphragm component and the magnetic plate being arranged in a one-to-one correspondence, the inner edge of the diaphragm component being connected to the magnetic plate;

[0010] The voice coil has its two opposite sides located in the magnetic gap. The upper part of the voice coil is connected to the frame located above the yoke, and the lower part of the voice coil is connected to the frame located below the yoke.

[0011] In one embodiment, the miniature speaker has a mirror-symmetric structure.

[0012] In one embodiment, the middle portion of the voice coil corresponds to the center washer.

[0013] In one embodiment, a basin frame is also included, the basin frame connecting the diaphragm assembly and the yoke.

[0014] In one embodiment, the diaphragm assembly includes an inner fixing part, an inner folded ring part, a transition part, an outer folded ring part, and an outer fixing part connected sequentially from the inside to the outside. The inner fixing part is connected to the magnetic plate, the outer fixing part is connected to the frame, and the frame is connected to the transition part.

[0015] In one embodiment, the skeleton includes an inner connecting portion, a clearance portion, and an outer connecting portion connected in sequence. The outer connecting portion is connected to the transition portion, the inner connecting portion is connected to the voice coil, and the clearance portion is used to avoid the inner folded loop portion.

[0016] In one embodiment, the avoidance portion is provided with a reinforcing plate.

[0017] In one embodiment, the inner connection portion is connected to the end face of the voice coil, and the magnetic plate has a clearance groove for venting the inner connection portion.

[0018] In one embodiment, a centering support is further included, the centering support comprising an inner mounting portion, a cantilever portion, and an outer mounting portion connected in sequence, the inner mounting portion being connected to the voice coil, and the outer mounting portion being connected to the frame.

[0019] In one embodiment, the inner mounting portion is provided with an inner solder pad, and the outer mounting portion is provided with an outer solder pad that is electrically connected to the inner solder pad.

[0020] The beneficial effects of this utility model are as follows: This miniature loudspeaker has a novel structure. It arranges symmetrical magnetic circuits composed of side magnetic structures, magnetic guide plates, and central magnets on both sides of the yoke, and forms a uniform magnetic gap between the central magnet and the side magnetic structures. This allows the upper and lower parts of the same voice coil to couple with the upper and lower skeletons of the yoke, respectively. The ring-shaped diaphragm assembly is directly connected to the corresponding magnetic guide plate, achieving misalignment with the magnetic gap. This ensures that the relative sides of the voice coil are always in the magnetic gap during vibration, thereby effectively improving the utilization rate of the magnetic circuit and increasing the driving force without increasing the overall thickness. At the same time, the symmetrical structure of the miniature loudspeaker suppresses polarization, ultimately achieving a significant improvement in the sound pressure level, frequency response range, and distortion performance of the miniature loudspeaker within a limited space, meeting the needs of portable electronic devices for high sound quality and miniaturization. Attached Figure Description

[0021] To more clearly illustrate the technical solutions in the embodiments of this utility model or the prior art, the drawings used in the description of the embodiments or the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of this utility model. For those skilled in the art, other drawings can be obtained based on the structures shown in these drawings without creative effort.

[0022] Figure 1 This is a schematic diagram of the overall structure of the miniature loudspeaker according to Embodiment 1 of this utility model;

[0023] Figure 2 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 1 ;

[0024] Figure 3 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 2 ;

[0025] Figure 4 This is a schematic diagram of the skeleton structure in the miniature loudspeaker according to Embodiment 1 of this utility model;

[0026] Figure 5 This is a schematic diagram of a portion of the structure of the miniature speaker according to Embodiment 1 of this utility model.

[0027] Explanation of icon numbers:

[0028] 1. Pot stand;

[0029] 2. Yoke; 21. Window opening;

[0030] 3. Edge magnetic structure; 31. Edge magnet steel;

[0031] 41. Central washer; 42. Central magnet;

[0032] 5. Voice coil;

[0033] 6. Magnetic guide plate; 61. Void-avoiding groove;

[0034] 7. Diaphragm assembly; 71. Inner fixing part; 72. Inner folding ring part; 73. Transition part; 74. Outer folding ring part; 75. Outer fixing part;

[0035] 8. Frame; 81. Internal connecting part; 82. Avoidance part; 83. External connecting part; 84. Reinforcing plate;

[0036] 9. Centering support; 91. Internal mounting part; 92. Cantilever part; 93. External mounting part. Detailed Implementation

[0037] The purpose, features, and advantages of this utility model will be further explained in conjunction with the embodiments and with reference to the accompanying drawings.

[0038] The technical solutions of the present utility model will be clearly and completely described below with reference to the accompanying drawings of the embodiments. Obviously, the described embodiments are only some embodiments of the present utility model, and not all embodiments. Based on the embodiments of the present utility model, all other embodiments obtained by those of ordinary skill in the art without creative effort are within the protection scope of the present utility model.

[0039] It should be noted that if the embodiments of this utility model involve directional indicators such as up, down, left, right, front, back, etc., the directional indicators are only used to explain the relative positional relationship and movement of the components in a specific posture as shown in the attached figure. If the specific posture changes, the directional indicators will also change accordingly.

[0040] Furthermore, if the embodiments of this utility model involve descriptions such as "first" or "second," such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of technical features indicated. Thus, a feature defined with "first" or "second" may explicitly or implicitly include at least one of those features.

[0041] Furthermore, if the meaning of "and / or" in the entire text is to include three parallel solutions, taking "and A / or B" as an example, it includes solution A, solution B, and a solution that simultaneously satisfies both A and B. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0042] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0043] Example 1

[0044] Please refer to Figures 1 to 5Embodiment 1 of this utility model is a miniature loudspeaker, comprising a frame 1, a yoke 2, a side magnetic structure 3, a center washer 41, a voice coil 5, two magnetic plates 6, and two sets of vibrating components. The frame 1 is connected to the yoke 2, and the yoke 2 has a window 21. Two sets of side magnetic structures 3 are provided on opposite sides of the yoke 2, with the two sets of side magnetic structures 3 on the same side of the yoke 2 arranged opposite each other and located on both sides of the window 21. One magnetic plate 6 covers the two sets of side magnetic structures 3 on one side of the yoke 2, and the other magnetic plate 6 covers the two sets of side magnetic structures 3 on the other side of the yoke 2. The center washer 41 is located in the window 21 and corresponds to the yoke 2, and center magnets 42 are provided on opposite sides of the center washer 41. The two central magnets 42 have opposite magnetic poles. The central magnet 42 located above the central washer 41 is connected to a magnetic guide plate 6, and the central magnet 42 located below the central washer 41 is connected to another magnetic guide plate 6. A magnetic gap is formed between the central magnets 42 and the side magnetic structure 3. The vibration assembly includes a connected diaphragm assembly 7 and a frame 8. The diaphragm assembly 7 is generally ring-shaped. The diaphragm assembly 7 and the magnetic guide plate 6 are arranged in a one-to-one correspondence. The inner edge of the diaphragm assembly 7 is connected to the magnetic guide plate 6, and the outer edge of the diaphragm assembly 7 is connected to the frame 1. The two opposite sides of the voice coil 5 are located in the magnetic gap. The upper part of the voice coil 5 is connected to the frame 8 located above the yoke 2, and the lower part of the voice coil 5 is connected to the frame 8 located below the yoke 2.

[0045] In some embodiments, the number of basin frames 1 is one, while in this embodiment, the number of basin frames 1 is two. The two opposite sides of the yoke 2 are respectively connected to the basin frames 1, and the two basin frames 1 are arranged in a one-to-one correspondence with the two sets of vibration components.

[0046] The miniature loudspeaker in this embodiment has a mirror-symmetric structure. Preferably, the middle part of the voice coil 5 corresponds to the central washer 41.

[0047] The edge magnetic structure 3 includes an edge magnet 31 connected to the yoke 2, and the edge magnet 31 is directly or indirectly connected to the magnetic plate 6.

[0048] Specifically, the diaphragm assembly 7 includes an inner fixing part 71, an inner folded ring part 72, a transition part 73, an outer folded ring part 74, and an outer fixing part 75 connected sequentially from the inside out. The inner fixing part 71 is connected to the magnetic guide plate 6, the outer fixing part 75 is connected to the frame 1, and the frame 8 is connected to the transition part 73. More specifically, the frame 8 includes an inner connecting part 81, a clearance part 82, and an outer connecting part 83 connected sequentially. The outer connecting part 83 is connected to the transition part 73, the inner connecting part 81 is connected to the voice coil 5, and the clearance part 82 is used to avoid the inner folded ring part 72.

[0049] To improve the structural strength of the frame 8, optionally, a reinforcing plate 84 is provided on the avoidance part 82, and the material hardness of the reinforcing plate 84 is greater than or equal to the material hardness of the frame 8.

[0050] In one or more embodiments, the inner connecting part 81 is connected to the end face of the voice coil 5. In this case, in order to avoid the inner connecting part 81 from colliding with the magnetic plate 6 during the vibration of the voice coil 5, the magnetic plate 6 preferably has an anti-cavitation groove 61 for avoiding the inner connecting part 81.

[0051] In some embodiments, the miniature loudspeaker further includes a centering support 9, which comprises an inner mounting portion 91, a cantilever portion 92, and an outer mounting portion 93 connected in sequence. The inner mounting portion 91 is connected to the voice coil 5, and the outer mounting portion 93 is connected to the frame 1. In this embodiment, there are eight centering supports 9, and two centering supports 9 are connected at intervals to each of the four corners of the voice coil 5.

[0052] The centering support 9 can be an FPC board. In some embodiments, the inner mounting part 91 is provided with an inner solder pad, and the outer mounting part 93 is provided with an outer solder pad that is electrically connected to the inner solder pad. The inner solder pad is used to solder and conduct with the voice coil 5, and the outer solder pad is electrically connected to an external power supply. In this way, the external power supply supplies power to the voice coil 5 through the centering support 9.

[0053] The above are merely optional embodiments of this utility model and do not limit the patent scope of this utility model. Any equivalent structural transformations made based on the inventive concept of this utility model and the contents of this utility model specification and drawings, or direct / indirect applications in other related technical fields, are included within the patent protection scope of this utility model.

Claims

1. A miniature loudspeaker, characterized in that: include A yoke, wherein the yoke is provided with a window; The yoke has two sets of side magnetic structures on its two opposite sides. The two sets of side magnetic structures on the same side of the yoke are arranged opposite each other and are located on both sides of the window. Two magnetic plates, one of which covers the two sets of side magnetic structures on one side of the yoke, and the other of which covers the two sets of side magnetic structures on the other side of the yoke; A central washer is located in the window. A central magnet is provided on two opposite sides of the central washer. The central magnet located above the central washer is connected to a magnetic plate, and the central magnet located below the central washer is connected to another magnetic plate. A magnetic gap is formed between the central magnet and the side magnetic structure. Two sets of vibration components, each vibration component including a connected diaphragm component and a frame, the diaphragm component being generally ring-shaped, the diaphragm component and the magnetic plate being arranged in a one-to-one correspondence, the inner edge of the diaphragm component being connected to the magnetic plate; The voice coil has its two opposite sides located in the magnetic gap. The upper part of the voice coil is connected to the frame located above the yoke, and the lower part of the voice coil is connected to the frame located below the yoke.

2. The miniature loudspeaker according to claim 1, characterized in that: The miniature loudspeaker has a mirror-symmetric structure.

3. The miniature loudspeaker according to claim 1, characterized in that: The middle part of the voice coil corresponds to the center washer.

4. The miniature loudspeaker according to claim 1, characterized in that: It also includes a frame that connects the diaphragm assembly to the yoke.

5. The miniature loudspeaker according to claim 4, characterized in that: The diaphragm assembly includes an inner fixing part, an inner folding ring part, a transition part, an outer folding ring part, and an outer fixing part connected sequentially from the inside to the outside. The inner fixing part is connected to the magnetic plate, the outer fixing part is connected to the frame, and the frame is connected to the transition part.

6. The miniature loudspeaker according to claim 5, characterized in that: The frame includes an inner connecting part, a clearance part, and an outer connecting part connected in sequence. The outer connecting part is connected to the transition part, the inner connecting part is connected to the voice coil, and the clearance part is used to avoid the inner folded loop part.

7. The miniature loudspeaker according to claim 6, characterized in that: The avoidance section is equipped with a reinforcing plate.

8. The miniature loudspeaker according to claim 6, characterized in that: The inner connecting part is connected to the end face of the voice coil, and the magnetic plate has a clearance groove for avoiding the inner connecting part.

9. The miniature loudspeaker according to claim 4, characterized in that: It also includes a centering support, which comprises an inner mounting part, a cantilever part, and an outer mounting part connected in sequence. The inner mounting part is connected to the voice coil, and the outer mounting part is connected to the frame.

10. The miniature loudspeaker according to claim 9, characterized in that: The inner mounting part is provided with an inner solder pad, and the outer mounting part is provided with an outer solder pad that is electrically connected to the inner solder pad.

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