Miniature speaker

Abstract

This utility model discloses a miniature loudspeaker, including a magnetic circuit assembly, a vibration assembly, and two voice coils. The magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke. The central magnetic structure is located between two oppositely disposed side magnetic structures, forming a magnetic gap between the central magnetic structure and the side magnetic structures. The upper yoke covers the central magnetic structure and the side magnetic structures. The central magnetic structure includes, from bottom to top, a lower central magnet, a lower central washer, a middle central magnet, an upper central washer, and an upper central magnet connected in sequence. The side magnetic structure includes, from bottom to top, a lower side magnet, a lower side washer, a middle side magnet, an upper side washer, and an upper side magnet connected in sequence. The voice coils are located in the magnetic gap, with one voice coil corresponding to the upper central washer and the other voice coil corresponding to the lower central washer. This miniature loudspeaker has a novel structure and good acoustic performance.

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 magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke. The central magnetic structure is located between two oppositely disposed side magnetic structures, forming a magnetic gap between the central magnetic structure and the side magnetic structures. The upper yoke covers the central magnetic structure and the side magnetic structures. The central magnetic structure includes, from bottom to top, a lower central magnet, a lower central washer, a middle central magnet, an upper central washer, and an upper central magnet connected in sequence. The magnetic poles of the lower central magnet and the middle central magnet face opposite directions, and the magnetic poles of the middle central magnet and the upper central magnet face opposite directions. The side magnetic structure includes, from bottom to top, a lower side magnet, a lower side washer, a middle side magnet, an upper side washer, and an upper side magnet connected in sequence. The magnetic poles of the lower side magnet and the middle side magnet face opposite directions, and the magnetic poles of the middle side magnet and the upper side magnet face opposite directions.

[0006] Two voice coils are located in the magnetic gap, one voice coil is set corresponding to the upper center washer, and the other voice coil is set corresponding to the lower center washer;

[0007] A vibration assembly, comprising a frame and a ring-shaped diaphragm assembly, the diaphragm assembly comprising an inner fixed part, an inner folded ring part, a transition part, an outer folded ring part and an outer fixed part connected sequentially from the inside to the outside, the inner fixed part being connected to the upper yoke, and the frame being connected to the transition part and the voice coil.

[0008] In one embodiment, the upper central washer corresponds to the upper side washer, and the lower central washer corresponds to the lower side washer.

[0009] In one embodiment, the diaphragm assembly includes an inner diaphragm, an outer diaphragm, and a connecting frame. The inner folded ring portion and the inner fixing portion are disposed on the inner diaphragm, the outer folded ring portion and the outer fixing portion are disposed on the outer diaphragm, and the connecting frame connects the inner diaphragm and the outer diaphragm to form the transition portion.

[0010] 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 connects to the transition portion. The inner connecting portion extends between the two voice coils and connects to the two voice coils respectively. The clearance portion is used to avoid the inner loop portion.

[0011] In one embodiment, the avoidance portion is provided with a reinforcing plate.

[0012] In one embodiment, the device further includes a frame and a centering support. The frame connects the outer fixing part and the lower yoke. The centering support includes 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.

[0013] In one embodiment, the inner mounting portion extends between the two voice coils and connects to the two voice coils respectively.

[0014] In one embodiment, the inner mounting portion has an inner pad electrically connected to the voice coil, and the outer mounting portion has an outer pad electrically connected to the inner pad.

[0015] In one embodiment, the four corners of the voice coil are respectively connected to the inner mounting portion.

[0016] In one embodiment, a fixing ring frame is further included, at least a portion of the inner fixing part is sandwiched between the fixing ring frame and the upper yoke, and the upper side magnet is indirectly connected to the upper yoke through the fixing ring frame.

[0017] The beneficial effects of this utility model are as follows:

[0018] This miniature loudspeaker features a novel structure. The magnetic circuit assembly is designed as a multi-layered stacked structure consisting of a lower yoke, a central magnetic structure / side magnetic structure, and an upper yoke. Within the central magnetic structure, alternating magnetic poles are stacked sequentially from a lower central magnet, a lower central washer, a middle central magnet, an upper central washer, and an upper central magnet. Simultaneously, the side magnetic structure also employs alternating opposite magnetic poles from a lower side magnet, a lower side washer, a middle side magnet, an upper side washer, and an upper side magnet. This results in a higher magnetic flux density within the magnetic gap formed between the central and side magnetic structures. Significantly enhanced and evenly distributed; based on this, two voice coils are respectively set in the magnetic gap corresponding to the upper and lower center washers, and the voice coils are connected to the diaphragm assembly, which is ring-shaped and has an inner and outer folded ring, through the skeleton. The inner fixing part of the diaphragm assembly is directly connected to the yoke, and the transition part is linked with the voice coil through the skeleton, which effectively improves the driving force transmission efficiency. Thus, the sound pressure level is significantly improved, harmonic distortion is reduced and the frequency response range is expanded in a limited space, meeting the needs of portable electronic devices for high sound quality and miniaturization of micro speakers.

[0019] During sound production, the voice coil of the miniature speaker does not detach from the magnetic gap, which greatly improves the utilization rate of magnetic force. Furthermore, the use of a dual voice coil architecture enhances the driving force of the miniature speaker, thereby significantly improving its acoustic performance. Attached Figure Description

[0020] 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.

[0021] Figure 1 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 1 ;

[0022] Figure 2 A cross-sectional view of the miniature loudspeaker according to Embodiment 1 of this utility model. Figure 2 ;

[0023] Figure 3 This is a schematic diagram of a portion of the structure of the miniature speaker according to Embodiment 1 of this utility model;

[0024] Figure 4 This is a schematic diagram of the voice coil and frame in the miniature loudspeaker of Embodiment 1 of this utility model.

[0025] Explanation of icon numbers:

[0026] 1. Pot stand;

[0027] 2. Magnetic circuit assembly; 21. Upper yoke; 22. Lower yoke; 23. Central magnetic structure; 231. Lower central magnet; 232. Lower central washer; 233. Middle central magnet; 234. Upper central washer; 235. Upper central magnet; 24. Side magnetic structure; 241. Lower side magnet; 242. Lower side washer; 243. Middle side magnet; 244. Upper side washer; 245. Upper side magnet;

[0028] 3. Frame; 31. Inner connecting part; 32. Avoidance part; 33. Outer connecting part; 34. Reinforcing plate;

[0029] 4. Diaphragm assembly; 41. Inner fixing part; 42. Inner folding ring part; 43. Transition part; 44. Outer folding ring part; 45. Outer fixing part; 46. Inner diaphragm; 47. Outer diaphragm; 48. Connecting frame;

[0030] 5. Voice coil;

[0031] 6. Centering support; 61. Internal mounting part; 62. Cantilever part; 63. External mounting part;

[0032] 7. Fixing ring frame. Detailed Implementation

[0033] 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.

[0034] 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.

[0035] 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.

[0036] 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.

[0037] 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 cannot be implemented, 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.

[0038] 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.

[0039] Example 1

[0040] Please refer to Figures 1 to 4 Embodiment 1 of this utility model is a miniature loudspeaker, including a frame 1, a magnetic circuit assembly 2, a vibration assembly, and two voice coils 5. The magnetic circuit assembly 2 includes an upper yoke 21, a lower yoke 22, and a central magnetic structure 23 and a side magnetic structure 24 respectively disposed on the lower yoke 22. The frame 1 is connected to the lower yoke 22. The central magnetic structure 23 is located between two oppositely disposed side magnetic structures 24, and a magnetic gap is formed between the central magnetic structure 23 and the side magnetic structures 24. The upper yoke 21 covers the central magnetic structure 23 and the side magnetic structures 24. The central magnetic structure 23 includes a lower central magnet 231, a lower central washer 232, a middle central magnet 233, and an upper central washer connected sequentially from bottom to top. The structure comprises: a lower side magnet 234, a lower side washer 242, a middle side magnet 243, an upper side washer 244, and an upper side magnet 245, connected sequentially from bottom to top. The lower side magnet 241 has magnetic poles opposite to those of the middle side magnet 243, and the middle side magnet 243 has magnetic poles opposite to those of the upper side magnet 245. The upper side washer 234 corresponds to the upper side washer 244, and the lower side washer 232 corresponds to the lower side washer 242.

[0041] The voice coil 5 is located in the magnetic gap, one voice coil 5 is set corresponding to the upper central washer 234, and the other voice coil 5 is set corresponding to the lower central washer 232;

[0042] The vibrating assembly includes a frame 3 and a ring-shaped diaphragm assembly 4. The diaphragm assembly 4 includes an inner fixing part 41, an inner folded ring part 42, a transition part 43, an outer folded ring part 44, and an outer fixing part 45 connected sequentially from the inside to the outside. The inner fixing part 41 is connected to the upper yoke 21. The frame 3 connects the transition part 43 and the voice coil 5. The outer fixing part 45 is connected to the frame 1.

[0043] In this embodiment, the diaphragm assembly 4 includes an inner diaphragm 46, an outer diaphragm 47, and a connecting frame 48. The inner folded ring portion 42 and the inner fixing portion 41 are disposed on the inner diaphragm 46, and the outer folded ring portion 44 and the outer fixing portion 45 are disposed on the outer diaphragm 47. The connecting frame 48 connects the inner diaphragm 46 and the outer diaphragm 47 to form the transition portion 43. In other embodiments, the inner diaphragm 46 and the outer diaphragm 47 may also be an integrally formed structure.

[0044] The frame 3 includes an inner connecting part 31, a clearance part 32, and an outer connecting part 33 connected in sequence. The outer connecting part 33 connects to the transition part 43. In this embodiment, the inner connecting part 31 extends between the two voice coils 5 and connects to the two voice coils 5 respectively. It can be seen that the inner connecting part 31 not only connects the voice coils 5, but also increases the distance between the two voice coils 5, so that the two voice coils 5 correspond to the upper center washer 234 and the lower center washer 232 respectively. The clearance part 32 is used to avoid the inner folded loop part 42, thereby preventing the inner folded loop part 42 from colliding with the frame 3 and generating noise when the miniature loudspeaker is working. In other embodiments, the inner connecting part 31 can also be connected to the outer wall surface of the voice coil 5.

[0045] To improve the structural strength of the frame 3, a reinforcing plate 34 is provided on the avoidance part 32, and the material hardness of the reinforcing plate 34 is greater than or equal to the material hardness of the frame 3.

[0046] The miniature loudspeaker also includes a centering support 6, which comprises an inner mounting portion 61, a cantilever portion 62, and an outer mounting portion 63 connected in sequence. The inner mounting portion 61 is connected to the voice coil 5, and the outer mounting portion 63 is connected to the frame 1. Optionally, the inner mounting portion 61 extends between the two voice coils 5 and connects to the two voice coils 5 respectively.

[0047] The inner mounting part 61 is provided with an inner solder pad that is electrically connected to the voice coil 5, and the outer mounting part 63 is provided with an outer solder pad that is electrically connected to the inner solder pad. The outer solder pad is used to connect to an external power supply. The external power supply supplies power to the voice coil 5 through the centering support 6. The centering support 6 can be an FPC board.

[0048] Optionally, the inner mounting portion 61 is connected to each of the four corners of the voice coil 5. In this embodiment, there are four centering supports 6, and the four centering supports 6 are arranged one-to-one with the four corners of the voice coil 5.

[0049] The miniature loudspeaker also includes a fixing ring frame 7, at least a portion of the inner fixing part 41 is sandwiched between the fixing ring frame 7 and the upper yoke 21, and the upper side magnet 245 is indirectly connected to the upper yoke 21 through the fixing ring frame 7.

[0050] 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 microspeaker, characterized by: include A magnetic circuit assembly includes an upper yoke, a lower yoke, and a central magnetic structure and a side magnetic structure respectively disposed on the lower yoke. The central magnetic structure is located between two oppositely disposed side magnetic structures, forming a magnetic gap between the central magnetic structure and the side magnetic structures. The upper yoke covers the central magnetic structure and the side magnetic structures. The central magnetic structure includes, from bottom to top, a lower central magnet, a lower central washer, a middle central magnet, an upper central washer, and an upper central magnet connected in sequence. The magnetic poles of the lower central magnet and the middle central magnet face opposite directions, and the magnetic poles of the middle central magnet and the upper central magnet face opposite directions. The side magnetic structure includes, from bottom to top, a lower side magnet, a lower side washer, a middle side magnet, an upper side washer, and an upper side magnet connected in sequence. The magnetic poles of the lower side magnet and the middle side magnet face opposite directions, and the magnetic poles of the middle side magnet and the upper side magnet face opposite directions. Two voice coils are located in the magnetic gap, one voice coil is set corresponding to the upper center washer, and the other voice coil is set corresponding to the lower center washer; A vibration assembly, comprising a frame and a ring-shaped diaphragm assembly, the diaphragm assembly comprising an inner fixed part, an inner folded ring part, a transition part, an outer folded ring part and an outer fixed part connected sequentially from the inside to the outside, the inner fixed part being connected to the upper yoke, and the frame being connected to the transition part and the voice coil.

2. The micro speaker of claim 1, wherein: The upper central washer corresponds to the upper side washer, and the lower central washer corresponds to the lower side washer.

3. The micro speaker of claim 1, wherein: The diaphragm assembly includes an inner diaphragm, an outer diaphragm, and a connecting frame. The inner folded ring and the inner fixing part are disposed on the inner diaphragm, and the outer folded ring and the outer fixing part are disposed on the outer diaphragm. The connecting frame connects the inner diaphragm and the outer diaphragm to form the transition part.

4. The microspeaker of claim 1, wherein: The frame includes an inner connecting part, a clearance part, and an outer connecting part connected in sequence. The outer connecting part connects to the transition part. The inner connecting part extends between the two voice coils and connects to the two voice coils respectively. The clearance part is used to avoid the inner folded loop part.

5. The microspeaker of claim 4, wherein: The avoidance section is equipped with a reinforcing plate.

6. The microspeaker of claim 1, wherein: It also includes a frame and a centering support. The frame connects the outer fixing part and the lower yoke. The centering support includes 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.

7. The microspeaker of claim 6, wherein: The inner mounting portion extends between the two voice coils and connects to the two voice coils respectively.

8. The microspeaker of claim 6, wherein: The inner mounting part is provided with an inner solder pad that is electrically connected to the voice coil, and the outer mounting part is provided with an outer solder pad that is electrically connected to the inner solder pad.

9. The microspeaker of claim 6, wherein: The four corners of the voice coil are respectively connected to the inner mounting part.

10. The microspeaker of claim 1, wherein: It also includes a fixing ring frame, at least a portion of the inner fixing part is sandwiched between the fixing ring frame and the upper yoke, and the upper side magnet is indirectly connected to the upper yoke through the fixing ring frame.

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