Miniature loudspeaker

Abstract

The miniature loudspeaker comprises a basin stand, a magnetic circuit assembly, a vibration assembly, an additional magnetic structure and a centering support chip, the magnetic circuit assembly is connected with the basin stand, the magnetic circuit assembly comprises a yoke, a center magnetic structure and a side magnetic structure, the center magnetic structure and the side magnetic structure are respectively arranged on the yoke, the center magnetic structure is in an annular frame shape, and an avoiding opening is formed in the center magnetic structure. An outer ring magnetic gap is formed between the side magnetic structure and the central magnetic structure; the vibrating assembly comprises a vibrating diaphragm assembly and an inner voice coil and an outer voice coil which are respectively arranged on the vibrating diaphragm assembly, the vibrating diaphragm assembly is connected with the basin stand, the outer voice coil is arranged corresponding to the outer ring magnetic gap, and the inner voice coil is arranged corresponding to the hollow area of the central magnetic structure; the additional magnetic structure comprises an elevated block arranged on the vibrating diaphragm assembly and additional magnetic steel arranged at the bottom of the elevated block; the centering disk comprises an extension arm, an inner mounting part, a cantilever part and an outer mounting part which are sequentially connected from inside to outside, and the cantilever part is arranged corresponding to the avoiding opening and is connected with the inner voice coil. The miniature loudspeaker is novel in structure and large in loudness.

Description

Technical Field

[0001] The present technical solution relates to the technical field of electroacoustic converters, and in particular to a micro loudspeaker. Background Art

[0002] As electronic devices become thinner and lighter, the space available for installing electroacoustic devices inside them becomes smaller and smaller. At the same time, users' requirements for electroacoustic devices are gradually increasing. How to improve the loudness of micro speakers within a certain space size has always been the goal pursued by practitioners. Utility Model Content

[0003] The technical problem to be solved by the utility model is to provide a miniature loudspeaker with high loudness.

[0004] In order to solve the above technical problems, the technical solution adopted by the present invention is: a micro speaker, comprising:

[0005] basin rack;

[0006] A magnetic circuit assembly connected to the basin frame, comprising a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, wherein the central magnetic structure is in the shape of a ring frame and is provided with a avoidance opening, and an outer ring magnetic gap is formed between the side magnetic structure and the central magnetic structure;

[0007] a vibration assembly, the vibration assembly comprising a diaphragm assembly and an inner voice coil and an outer voice coil respectively provided on the diaphragm assembly, the diaphragm assembly being connected to the basin frame, the outer voice coil being provided corresponding to the magnetic gap of the outer coil, and the inner voice coil being provided corresponding to the hollow area of ​​the central magnetic structure;

[0008] an additional magnetic structure, the additional magnetic structure comprising an elevated block provided on the diaphragm assembly and an additional magnetic steel provided at the bottom of the elevated block, the elevated block being located inside the inner voice coil, the magnetic pole direction of the additional magnetic steel being the same as the magnetic pole direction of the edge magnetic structure;

[0009] The centering support plate includes an extension arm, an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence from the inside to the outside, the outer mounting portion is connected to the basin frame, the inner mounting portion is connected to the outer voice coil, and the cantilever portion is arranged corresponding to the avoidance opening and connected to the inner voice coil.

[0010] Furthermore, the inner voice coil and the outer voice coil are coaxially arranged.

[0011] Furthermore, the inner voice coil and the outer voice coil are connected in parallel.

[0012] Furthermore, the inner voice coil and the outer voice coil are energized respectively.

[0013] Furthermore, a mounting groove for mounting the additional magnetic steel is provided at the bottom of the elevated block.

[0014] Furthermore, a weight-reducing groove is provided on the elevated block.

[0015] Furthermore, the number of the weight-reducing grooves is one or more.

[0016] Furthermore, the weight-reducing groove is a blind groove or a through groove.

[0017] Furthermore, the yoke has a clearance groove corresponding to the additional magnetic structure.

[0018] Furthermore, the air-avoiding groove is a blind groove or a through groove.

[0019] The beneficial effect of the present invention is that the micro-speaker has an inner and outer dual voice coil, which can provide a stronger driving force for the diaphragm assembly, thereby increasing the amplitude of the diaphragm assembly. At the same time, during the vibration process of the vibration assembly, when the additional magnetic steel rises / falls to a certain extent, a repulsive force is generated between the additional magnetic steel and the central magnetic structure, which can further increase the amplitude of the diaphragm assembly, thereby enabling the micro-speaker to achieve a greater loudness effect. BRIEF DESCRIPTION OF THE DRAWINGS

[0020] Figure 1 is a cross-sectional view of the micro-speaker according to the first embodiment of the present invention;

[0021] Figure 2 This is a schematic structural diagram of a portion of the micro-speaker according to the first embodiment of the present invention.

[0022] Description of labels:

[0023] 1. Basin rack;

[0024] 2. Magnetic circuit assembly; 21. Yoke; 211. Air avoidance groove; 22. Center magnetic structure; 221. Avoidance port; 23. Side magnetic structure;

[0025] 3. Vibration assembly; 31. Diaphragm assembly; 32. Inner voice coil; 33. Outer voice coil;

[0026] 4. Additional magnetic structure; 41. Elevator block; 411. Mounting slot; 412. Weight reduction slot; 42. Additional magnetic steel;

[0027] 5. Centering support piece; 51. Extension arm; 52. Inner mounting portion; 53. Cantilever portion; 54. Outer mounting portion. DETAILED DESCRIPTION

[0028] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following description is given in conjunction with the embodiments and the accompanying drawings.

[0029] Please refer to Figure 1 as well as Figure 2 , micro speakers, including:

[0030] Basin rack 1;

[0031] A magnetic circuit assembly 2 is connected to the basin frame 1 and includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively provided on the yoke 21. The central magnetic structure 22 is in the shape of a ring frame and is provided with a avoidance opening 221. An outer magnetic gap is formed between the side magnetic structure 23 and the central magnetic structure 22.

[0032] a vibration assembly 3, comprising a diaphragm assembly 31 and an inner voice coil 32 and an outer voice coil 33 respectively provided on the diaphragm assembly 31; the diaphragm assembly 31 being connected to the basin frame 1; the outer voice coil 33 being provided corresponding to the outer coil magnetic gap; and the inner voice coil 32 being provided corresponding to the hollow area of ​​the central magnetic structure 22;

[0033] An additional magnetic structure 4, comprising an elevated block 41 disposed on the diaphragm assembly 31 and an additional magnetic steel 42 disposed at the bottom of the elevated block 41, wherein the elevated block 41 is located inside the inner voice coil 32, and the magnetic pole direction of the additional magnetic steel 42 is the same as the magnetic pole direction of the edge magnetic structure 23;

[0034] The centering support plate 5 includes an extension arm 51, an inner mounting portion 52, a cantilever portion 53 and an outer mounting portion 54 connected in sequence from the inside to the outside. The outer mounting portion 54 is connected to the basin frame 1, the inner mounting portion 52 is connected to the outer voice coil 33, and the cantilever portion 53 is arranged corresponding to the avoidance opening 221 and is connected to the inner voice coil 32.

[0035] From the above description, it can be seen that the beneficial effect of the present invention is that: the micro-speaker has an inner and outer double voice coil, which can provide a stronger driving force for the diaphragm assembly 31, so that the amplitude of the diaphragm assembly 31 is increased. At the same time, during the vibration process of the vibration assembly 3, when the additional magnetic steel 42 rises / falls to a certain extent, a repulsive force is generated between the additional magnetic steel 42 and the central magnetic structure 22, which can further increase the amplitude of the diaphragm assembly 31, so that the micro-speaker can achieve a greater loudness effect.

[0036] Furthermore, the inner voice coil 32 and the outer voice coil 33 are coaxially arranged.

[0037] As can be seen from the above description, the coaxial arrangement of the inner voice coil 32 and the outer voice coil 33 can make the diaphragm assembly 31 more balanced in force.

[0038] Furthermore, the inner voice coil 32 and the outer voice coil 33 are connected in parallel.

[0039] Furthermore, the inner voice coil 32 and the outer voice coil 33 are energized respectively.

[0040] As can be seen from the above description, the specific energization method of the inner voice coil 32 and the outer voice coil 33 can be selected as needed.

[0041] Furthermore, a mounting groove 411 for mounting the additional magnetic steel 42 is provided at the bottom of the elevated block 41 .

[0042] As can be seen from the above description, the presence of the mounting groove 411 can facilitate the positioning and installation of the additional magnetic steel 42 .

[0043] Furthermore, a weight-reducing groove 412 is provided on the elevated block 41 .

[0044] As can be seen from the above description, the presence of the weight-reducing groove 412 can reduce the total weight of the vibration system of the micro-speaker, thereby improving the sensitivity and loudness of the micro-speaker.

[0045] Furthermore, the number of the weight-reducing grooves 412 is one or more.

[0046] It can be seen from the above description that the number of the weight reduction grooves 412 can be set as needed.

[0047] Furthermore, the weight-reducing groove 412 is a blind groove or a through groove.

[0048] As can be seen from the above description, the specific structural form of the weight-reducing groove 412 can be freely selected.

[0049] Furthermore, the yoke 21 has a clearance groove 211 corresponding to the additional magnetic structure 4 .

[0050] As can be seen from the above description, the presence of the air-avoidance groove 211 can prevent the diaphragm assembly 31 from colliding with the raising block 41, the additional magnetic steel 42 and the yoke 21 during the downward vibration process to generate noise, which is beneficial to ensuring the acoustic performance of the micro speaker.

[0051] Furthermore, the air-avoiding groove 211 is a blind groove or a through groove.

[0052] It can be seen from the above description that the specific structural form of the air-avoiding groove 211 can be freely selected.

[0053] Example 1

[0054] Please refer to Figure 1 and Figure 2, Embodiment 1 of the present utility model is: a micro speaker, including a basin 1, a magnetic circuit component 2, a vibration component 3, an additional magnetic structure 4 and a centering support plate 5, the magnetic circuit component 2 is connected to the basin 1, the magnetic circuit component 2 includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively provided on the yoke 21, the central magnetic structure 22 is in the shape of a ring frame, the central magnetic structure 22 is provided with a avoidance opening 221, and an outer ring magnetic gap is formed between the side magnetic structure 23 and the central magnetic structure 22; specifically, the central magnetic structure 22 includes a central magnetic steel and a central washer provided on the central magnetic steel, the central magnetic steel is connected to the yoke 21, the side magnetic structure 23 includes a side magnetic steel and a side washer provided on the side magnetic steel, the side magnetic steel is connected to the yoke 21, and the side washer is connected to the basin 1;

[0055] The vibration assembly 3 includes a diaphragm assembly 31 and an inner voice coil 32 and an outer voice coil 33 respectively provided on the diaphragm assembly 31. The diaphragm assembly 31 is connected to the basin frame 1. The outer voice coil 33 is provided corresponding to the outer coil magnetic gap, and the inner voice coil 32 is provided corresponding to the hollow area of ​​the central magnetic structure 22.

[0056] The additional magnetic structure 4 includes a raised block 41 provided on the diaphragm assembly 31 and an additional magnetic steel 42 provided at the bottom of the raised block 41. The raised block 41 is located inside the inner voice coil 32. The magnetic pole direction of the additional magnetic steel 42 is the same as the magnetic pole direction of the side magnetic structure 23. Specifically, when the top of the side magnetic steel is the N pole, the top of the center magnetic steel is the S pole, and the top of the additional magnetic steel 42 is the N pole. When the top of the side magnetic steel is the S pole, the top of the center magnetic steel is the N pole, and the top of the additional magnetic steel 42 is the S pole.

[0057] The centering support plate 5 includes an extension arm 51, an inner mounting portion 52, a cantilever portion 53 and an outer mounting portion 54 connected in sequence from the inside to the outside. The outer mounting portion 54 is connected to the basin frame 1, the inner mounting portion 52 is connected to the outer voice coil 33, and the cantilever portion 53 is arranged corresponding to the avoidance opening 221 and is connected to the inner voice coil 32.

[0058] Preferably, the inner voice coil 32 and the outer voice coil 33 are coaxially arranged.

[0059] In this embodiment, the inner voice coil 32 and the outer voice coil 33 are connected in parallel. In this case, the inner and outer voice coils 32, 33 are energized simultaneously and operate simultaneously, effectively suppressing polarization of the vibration assembly 3. In other embodiments, the inner and outer voice coils 32, 33 can be energized separately. In this case, different voltages can be provided to the inner and outer voice coils 32, 33 to adjust the driving force. It will be readily understood that the inner and outer voice coils 32, 33 can be powered by an external power supply via the centering plate 5.

[0060] To facilitate the positioning and installation of the additional magnetic steel 42 , optionally, a mounting groove 411 for mounting the additional magnetic steel 42 is provided at the bottom of the elevation block 41 .

[0061] In this embodiment, a weight-reducing groove 412 is provided on the elevation block 41 , and the weight-reducing groove 412 can reduce the weight carried by the vibration assembly 3 .

[0062] The number of the weight-reducing grooves 412 is one or more; the weight-reducing grooves 412 are blind grooves or through grooves. In this embodiment, the number of the weight-reducing grooves 412 is one, and the weight-reducing grooves 412 are through grooves.

[0063] In order to prevent the additional magnetic structure 4 from colliding with the yoke 21 , optionally, the yoke 21 has an air-avoiding groove 211 provided corresponding to the additional magnetic structure 4 , and the air-avoiding groove 211 is a blind groove or a through groove.

[0064] In summary, the micro-speaker provided by the present invention has a novel structure, loud sound, good acoustic performance, and rich diversity.

[0065] The above description is merely an embodiment of the present invention and does not limit the patent scope of the present invention. Any equivalent transformations made using the contents of the description and drawings of the present invention, or directly or indirectly applied in the relevant technical field, are also included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: include basin rack; A magnetic circuit assembly connected to the basin frame, comprising a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, wherein the central magnetic structure is in the shape of a ring frame and is provided with a avoidance opening, and an outer ring magnetic gap is formed between the side magnetic structure and the central magnetic structure; a vibration assembly, the vibration assembly comprising a diaphragm assembly and an inner voice coil and an outer voice coil respectively provided on the diaphragm assembly, the diaphragm assembly being connected to the basin frame, the outer voice coil being provided corresponding to the magnetic gap of the outer coil, and the inner voice coil being provided corresponding to the hollow area of ​​the central magnetic structure; an additional magnetic structure, the additional magnetic structure comprising an elevated block provided on the diaphragm assembly and an additional magnetic steel provided at the bottom of the elevated block, the elevated block being located inside the inner voice coil, the magnetic pole direction of the additional magnetic steel being the same as the magnetic pole direction of the edge magnetic structure; The centering support plate includes an extension arm, an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence from the inside to the outside, the outer mounting portion is connected to the basin frame, the inner mounting portion is connected to the outer voice coil, and the cantilever portion is arranged corresponding to the avoidance opening and connected to the inner voice coil.

2. The micro-speaker according to claim 1, wherein: The inner voice coil and the outer voice coil are coaxially arranged.

3. The micro-speaker according to claim 1, wherein: The inner voice coil is connected in parallel with the outer voice coil.

4. The micro-speaker according to claim 1, wherein: The inner voice coil and the outer voice coil are energized respectively.

5. The micro-speaker according to claim 1, wherein: The bottom of the elevated block is provided with an installation slot for installing the additional magnetic steel.

6. The micro-speaker according to claim 1, wherein: The elevated block is provided with a weight-reducing groove.

7. The micro-speaker according to claim 6, wherein: The number of the weight-reducing grooves is one or more.

8. The micro-speaker according to claim 6, wherein: The weight-reducing groove is a blind groove or a through groove.

9. The micro-speaker according to claim 1, wherein: The yoke has a space-avoiding groove corresponding to the additional magnetic structure.

10. The micro-speaker according to claim 9, wherein: The air-avoiding groove is a blind groove or a through groove.

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