Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin stand, a magnetic circuit assembly, a vibration assembly, an additional magnetic structure and a centering disk, the magnetic circuit assembly is connected with the basin stand, the magnetic circuit assembly comprises a yoke, a central magnetic structure and a side magnetic structure, the central magnetic structure and the side magnetic structure are respectively arranged on the yoke, and the central magnetic structure is in a continuous ring frame shape. An outer ring magnetic gap is formed between the side magnetic structure and the central magnetic structure; the vibration assembly comprises a diaphragm assembly and a voice coil assembly arranged on the diaphragm assembly, the voice coil assembly comprises an inner voice coil and an outer voice coil, the diaphragm assembly is connected with the frame, 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 elevated block is located on the inner side of the inner voice coil, and the magnetic pole direction of the additional magnetic steel is the same as that of the edge magnetic structure. The miniature loudspeaker is novel in structure, large in magnetic field intensity, large in sound generating loudness, good in acoustic performance and rich in diversity.

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 a continuous ring frame shape, 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 a voice coil assembly disposed on the diaphragm assembly, the voice coil assembly comprising an inner voice coil and an outer voice coil, the diaphragm assembly being connected to the basin frame, the outer voice coil being disposed corresponding to the outer coil magnetic gap, and the inner voice coil being disposed 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 a conducting portion, a descending portion, an inner mounting portion, a cantilever portion and an outer mounting portion which are sequentially connected from the inside to the outside. The conducting portion is fixed on the diaphragm assembly and conducts the voice coil assembly. The outer mounting portion is connected to the basin frame.

[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, there are multiple centering supports, and the inner voice coil and the outer voice coil are respectively connected to each other through the conducting parts of different centering supports.

[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 effects of this utility model are as follows: the micro-speaker has dual inner and outer voice coils, which can provide a stronger driving force for the diaphragm assembly, thereby increasing the diaphragm assembly's amplitude. At the same time, when the additional magnetic steel rises or falls to a certain degree during the vibration process of the vibration assembly, a repulsive force is generated between the additional magnetic steel and the central magnetic structure, further increasing the diaphragm assembly's amplitude, thereby enabling the micro-speaker to achieve a higher loudness effect. The central magnetic structure is a continuous ring frame with a large overall volume, which gives the micro-speaker a greater magnetic field strength, thereby achieving better acoustic performance. 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 diagram of the structure of a micro speaker according to the first embodiment of the present invention. Figure 1 ;

[0022] Figure 3 This is a schematic diagram of the structure of a micro speaker according to the first embodiment of the present invention. Figure 2 .

[0023] Description of labels:

[0024] 1. Basin rack;

[0025] 2. Magnetic circuit assembly; 21. Yoke; 211. Air-avoiding slot; 22. Center magnetic structure; 23. Side magnetic structure;

[0026] 3. Vibration assembly; 31. Diaphragm assembly; 311. Diaphragm; 312. Dome; 313. Frame; 314. Support arm; 32. Inner voice coil; 33. Outer voice coil;

[0027] 4. Additional magnetic structure; 41. Elevator block; 411. Mounting slot; 412. Weight reduction slot; 42. Additional magnetic steel;

[0028] 5. Centering support piece; 51. Conducting part; 52. Descending part; 53. Inner mounting part; 54. Cantilever part; 55. Outer mounting part. DETAILED DESCRIPTION

[0029] 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.

[0030] Please refer to Figures 1 to 3 , micro speakers, including:

[0031] Basin rack 1;

[0032] A magnetic circuit assembly 2 connected to the basin frame 1, comprising a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively provided on the yoke 21, wherein the central magnetic structure 22 is in the shape of a continuous ring frame, and an outer magnetic gap is formed between the side magnetic structure 23 and the central magnetic structure 22;

[0033] a vibration assembly 3, the vibration assembly 3 comprising a diaphragm assembly 31 and a voice coil assembly disposed on the diaphragm assembly 31, the voice coil assembly comprising an inner voice coil 32 and an outer voice coil 33; the diaphragm assembly 31 being connected to the basin frame 1, the outer voice coil 33 being disposed corresponding to the outer coil magnetic gap, and the inner voice coil 32 being disposed corresponding to the hollow area of ​​the central magnetic structure 22;

[0034] 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;

[0035] The centering support plate 5 includes a conducting portion 51, a descending portion 52, an inner mounting portion 53, a cantilever portion 54 and an outer mounting portion 55 which are sequentially connected from the inside to the outside. The conducting portion 51 is fixed on the diaphragm assembly 31 and conducts the voice coil assembly. The outer mounting portion 55 is connected to the basin frame 1.

[0036] As can be seen from the above description, the beneficial effects of the present invention are as follows: the micro-speaker has dual inner and outer voice coils, which can provide a stronger driving force for the diaphragm assembly 31, thereby increasing the amplitude of the diaphragm assembly 31. At the same time, when the vibration assembly 3 vibrates, when the additional magnetic steel 42 rises / falls to a certain degree, 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, thereby enabling the micro-speaker to achieve a louder effect. The central magnetic structure 22 is in the shape of a continuous ring frame and has a large overall volume, which gives the micro-speaker a greater magnetic field strength, thereby enabling the micro-speaker to have better acoustic performance.

[0037] Furthermore, the inner voice coil 32 and the outer voice coil 33 are coaxially arranged.

[0038] 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.

[0039] Furthermore, the inner voice coil 32 and the outer voice coil 33 are connected in parallel.

[0040] Furthermore, there are multiple centering arms 5 , and the inner voice coil 32 and the outer voice coil 33 are respectively connected to each other through the conducting portions 51 of different centering arms 5 .

[0041] 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.

[0042] Furthermore, a mounting groove 411 for mounting the additional magnetic steel 42 is provided at the bottom of the elevated block 41 .

[0043] 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 .

[0044] Furthermore, a weight-reducing groove 412 is provided on the elevated block 41 .

[0045] 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.

[0046] Furthermore, the number of the weight-reducing grooves 412 is one or more.

[0047] It can be seen from the above description that the number of the weight reduction grooves 412 can be set as needed.

[0048] Furthermore, the weight-reducing groove 412 is a blind groove or a through groove.

[0049] As can be seen from the above description, the specific structural form of the weight-reducing groove 412 can be freely selected.

[0050] Furthermore, the yoke 21 has a clearance groove 211 corresponding to the additional magnetic structure 4 .

[0051] 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.

[0052] Furthermore, the air-avoiding groove 211 is a blind groove or a through groove.

[0053] It can be seen from the above description that the specific structural form of the air-avoiding groove 211 can be freely selected.

[0054] Example 1

[0055] Please refer to Figures 1 to 3 , 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 a continuous ring frame shape, 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. In this embodiment, the central magnetic steel and the center washer are respectively in a continuous ring frame shape;

[0056] The vibration assembly 3 includes a diaphragm assembly 31 and a voice coil assembly provided on the diaphragm assembly 31. The voice coil assembly includes an inner voice coil 32 and an outer voice coil 33 arranged coaxially. The diaphragm assembly 31 is connected to the basin frame 1. The outer voice coil 33 is provided corresponding to the magnetic gap of the outer coil, and the inner voice coil 32 is provided corresponding to the hollow area of ​​the central magnetic structure 22.

[0057] 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.

[0058] The centering support 5 includes a conducting portion 51, a descending portion 52, an inner mounting portion 53, a cantilever portion 54 and an outer mounting portion 55 which are sequentially connected from the inside to the outside. The conducting portion 51 is fixed on the diaphragm assembly 31 and conducts the voice coil assembly. The outer mounting portion 55 is connected to the basin frame 1.

[0059] In detail, the diaphragm assembly 31 includes a sound membrane 311 and a dome 312 and a skeleton 313 respectively connected to the sound membrane 311, and the skeleton 313 is connected to the outer voice coil 33. The skeleton 313 can allow more areas of the lower part of the outer voice coil 33 to extend into the outer ring magnetic gap, thereby improving the performance of the micro speaker; in this embodiment, the skeleton 313 has a support arm 314 extending toward the direction close to the yoke 21, the inner fixing portion is fixedly connected to the support arm 314, and / or the descending portion 52 is fixedly connected to the support portion.

[0060] Optionally, there are multiple centering supports 5, and the inner voice coil 32 and outer voice coil 33 are electrically connected via the conductive portions 51 of different centering supports 5. In this embodiment, there are two centering supports 5. The leads of the inner voice coil 32 pass through the frame 313 and are welded to the conductive portion 51 of one centering support 5; the leads of the outer voice coil 33 are welded to the conductive portion 51 of the other centering support 5. The inner and outer voice coils 32, 33 are electrically connected separately, providing different voltages to the inner and outer voice coils 32, 33 to adjust the driving force. Furthermore, the microspeaker with a coaxial dual voice coil architecture can effectively suppress polarization of the vibration component 3. In other embodiments, the inner and outer voice coils 32, 33 are connected in parallel, in which case the conduction control of the microspeaker is more simplified.

[0061] 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 .

[0062] 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 .

[0063] 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.

[0064] 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.

[0065] In summary, the micro-speaker provided by the present invention has a novel structure, a strong magnetic field intensity, a loud sound, good acoustic performance, and rich diversity.

[0066] 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 a continuous ring frame shape, 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 a voice coil assembly disposed on the diaphragm assembly, the voice coil assembly comprising an inner voice coil and an outer voice coil, the diaphragm assembly being connected to the basin frame, the outer voice coil being disposed corresponding to the outer coil magnetic gap, and the inner voice coil being disposed 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 a conducting portion, a descending portion, an inner mounting portion, a cantilever portion and an outer mounting portion which are sequentially connected from the inside to the outside. The conducting portion is fixed on the diaphragm assembly and conducts the voice coil assembly. The outer mounting portion is connected to the basin frame.

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: There are multiple centering arms, and the inner voice coil and the outer voice coil are respectively connected to each other through the conducting parts of different centering arms.

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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