Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin stand, a vibration assembly, a magnetic circuit assembly and a second magnetic attraction piece, the vibration assembly comprises a diaphragm assembly, a voice coil and first magnetic attraction pieces, the diaphragm assembly is connected with the basin stand and the voice coil, the whole voice coil is in a frame shape, and the first magnetic attraction pieces are respectively and correspondingly arranged at all corners of the voice coil; the magnetic circuit assembly is connected with the basin stand and comprises a yoke, and the yoke is provided with a window corresponding to the first magnetic attraction piece; the second magnetic attraction piece is rotatably arranged on the bottom face of the yoke and opens and closes the window, and the thickness of the second magnetic attraction piece changes around the rotating center axis so as to adjust the magnetic attraction force between the second magnetic attraction piece and the first magnetic attraction piece. According to the miniature loudspeaker provided by the utility model, the vibration condition of the local area of the vibration assembly can be adjusted, so that the phenomenon that the amplitudes of all positions of the diaphragm assembly are inconsistent when the miniature loudspeaker vibrates is improved, the acoustic performance of the miniature loudspeaker can be improved, and the adjustment operation process is simple.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic converters, in particular to a miniature loudspeaker. Background Art

[0002] With the rapid development of portable electronic devices such as mobile phones, laptops, and hearing aids, people have higher and higher requirements for the miniature electroacoustic devices used in them. The miniature speakers and receivers used are becoming more and more large-amplitude speakers or super-linear speakers. The amplitude of miniature speakers and receivers has also gradually increased from the original 0.2mm to 0.25mm, 0.3mm, and even to the current super-linear or large-amplitude devices of 0.65mm or more.

[0003] However, when the micro-speaker vibrates violently with a large amplitude, it is easy for the vibration amplitudes of multiple positions of the diaphragm assembly to be inconsistent, which affects the acoustic performance of the micro-speaker. Utility Model Content

[0004] The technical problem to be solved by the utility model is to provide a miniature loudspeaker with adjustable amplitude at each position of a diaphragm assembly.

[0005] In order to solve the above technical problems, the technical solution adopted by the utility model is: a miniature speaker, comprising:

[0006] basin stand;

[0007] A vibration assembly, the vibration assembly comprising a diaphragm assembly, a voice coil and a first magnetic attraction member, the diaphragm assembly connects the basin frame and the voice coil, the voice coil is frame-shaped as a whole, and each corner of the voice coil is respectively provided with the first magnetic attraction member;

[0008] A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a yoke, and the yoke has a window arranged corresponding to the first magnetic attraction member;

[0009] The second magnetic member is rotatably disposed on the bottom surface of the yoke and opens and closes the window. The thickness of the second magnetic member varies around its rotation center axis to adjust the magnetic attraction force between the second magnetic member and the first magnetic member.

[0010] Furthermore, when looking up at the second magnetic attraction member, the second magnetic attraction member is fan-shaped as a whole.

[0011] Furthermore, the second magnetic attraction member has a spiral slope structure.

[0012] Furthermore, the second magnetic attraction member has a support wall, and the top of the support wall contacts the bottom surface of the yoke.

[0013] Furthermore, the first magnetic attraction member is arranged close to the window.

[0014] Furthermore, the vibration assembly also includes a frame, and the frame connects the diaphragm assembly and the first magnetic attraction component.

[0015] Furthermore, the first magnetic attraction component is arranged on the voice coil.

[0016] Furthermore, a receiving groove is provided on the bottom surface of the yoke, and at least a partial area of ​​the second magnetic attraction member is located in the receiving groove.

[0017] Furthermore, the window is overall in an arc shape.

[0018] Furthermore, the voice coil is in a rectangular frame shape as a whole, the number of the windows is four, and each of the windows is respectively provided with the second magnetic attraction component.

[0019] The beneficial effect of the utility model is that the second magnetic component has multiple areas with different thicknesses, which can realize the adjustment of the magnetic attraction force between the first magnetic component and the second magnetic component. The user can adjust the magnetic attraction force of the local area of ​​the vibration component by rotating different second magnetic components, thereby adjusting the vibration of the local area of ​​the vibration component, thereby improving the phenomenon of inconsistent amplitudes at different positions of the diaphragm component when the micro-speaker vibrates, which is beneficial to improving the acoustic performance of the micro-speaker.

[0020] The window provided on the yoke can relieve the guiding effect of the yoke on the magnetic flux lines in the window area, thereby reducing the influence of the yoke on the magnetic attraction effect between the first magnetic attraction component and the second magnetic attraction component. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] Figure 1 It is a structural schematic diagram of a part of the structure of the micro speaker of the first embodiment of the utility model;

[0022] Figure 2 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0023] Figure 3 It is a schematic structural diagram of the second magnetic attraction component in the micro-speaker of the first embodiment of the utility model.

[0024] Description of labels:

[0025] 1. Basin stand;

[0026] 2. Diaphragm assembly;

[0027] 3. Voice coil;

[0028] 4. A first magnetic attraction member;

[0029] 5. yoke; 51. window; 52. receiving groove;

[0030] 6. Central magnetic structure;

[0031] 7. Flanging;

[0032] 8. second magnetic attraction member; 81. slope structure; 82. support wall;

[0033] 9. Skeleton. DETAILED DESCRIPTION

[0034] In order to explain the technical content, achieved objectives and effects of the present invention in detail, the following is an explanation in conjunction with the implementation modes and the accompanying drawings.

[0035] In order to allow readers to more fully understand the technical solution, the following drawings are attached to the specification: Figure 1 In the figure, a second magnetic attraction component is hidden, which is hereby explained.

[0036] Please refer to Figures 1 to 3 , a micro speaker, comprising:

[0037] Basin stand 1;

[0038] A vibration assembly, the vibration assembly comprising a diaphragm assembly 2, a voice coil 3 and a first magnetic member 4, the diaphragm assembly 2 connects the basin frame 1 and the voice coil 3, the voice coil 3 is frame-shaped as a whole, and each corner of the voice coil 3 is respectively provided with the first magnetic member 4;

[0039] A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame 1, the magnetic circuit assembly comprises a yoke 5, and the yoke 5 has a window 51 arranged corresponding to the first magnetic attraction member 4;

[0040] The second magnetic member 8 is rotatably disposed on the bottom surface of the yoke 5 and opens and closes the window 51 . The thickness of the second magnetic member 8 varies around its rotation center axis to adjust the magnetic attraction force between the second magnetic member 8 and the first magnetic member 4 .

[0041] From the above description, it can be seen that the beneficial effect of the utility model is that the second magnetic member 8 has multiple areas of different thicknesses, which can realize the adjustment of the magnetic attraction between the first magnetic member 4 and the second magnetic member 8. The user can adjust the magnetic attraction of the local area of ​​the vibration component by rotating different second magnetic members 8, thereby adjusting the vibration of the local area of ​​the vibration component, thereby improving the inconsistency of the amplitude of each position of the diaphragm assembly 2 when the micro-speaker vibrates, which is beneficial to improving the acoustic performance of the micro-speaker. The window 51 is set on the yoke 5 to release the guiding effect of the yoke 5 on the magnetic flux lines in the window 51 area, and reduce the influence of the yoke 5 on the magnetic attraction effect between the first magnetic member 4 and the second magnetic member 8.

[0042] Furthermore, when looking up at the second magnetic member 8 , the second magnetic member 8 is fan-shaped as a whole.

[0043] From the above description, it can be seen that the fan-shaped second magnetic component 8 not only uses less consumables, which is helpful to save the manufacturing cost of the micro speaker, but also has more thickness options, making it more convenient for users to adjust the magnetic attraction between it and the first magnetic component 4.

[0044] Furthermore, the second magnetic attraction member 8 has a spiral slope structure 81 .

[0045] It can be seen from the above description that the magnetic attraction force between the second magnetic attraction component 8 having the spiral slope structure 81 and the first magnetic attraction component 4 can be adjusted more accurately, and stepless adjustment of the magnetic attraction force can be achieved.

[0046] Furthermore, the second magnetic attraction member 8 has a support wall 82 , and the top of the support wall 82 contacts the bottom surface of the yoke 5 .

[0047] It can be seen from the above description that the support wall 82 can make up for the height difference between the low point and the high point of the slope structure 81, thereby reducing the risk of damage to the area of ​​the slope structure 81 with lower thickness due to accidental pressure.

[0048] Furthermore, the first magnetic element 4 is disposed close to the window 51 .

[0049] It can be seen from the above description that the first magnetic member 4 is arranged close to the window 51 is equivalent to the first magnetic member 4 being arranged close to the second magnetic member 8 , so that better magnetic attraction can be achieved between the first magnetic member 4 and the second magnetic member 8 .

[0050] Furthermore, the vibration assembly also includes a skeleton 9 , and the skeleton 9 connects the diaphragm assembly 2 and the first magnetic attraction component 4 .

[0051] It can be seen from the above description that the frame 9 plays a role in placing the first magnetic attraction component 4 close to the second magnetic attraction component 8 .

[0052] Furthermore, the first magnetic component 4 is disposed on the voice coil 3 .

[0053] It can be seen from the above description that the first magnetic member 4 is disposed on the voice coil 3 to simplify the structure of the micro speaker, facilitate the assembly and manufacturing of the micro speaker, and thus save the manufacturing cost of the micro speaker.

[0054] Furthermore, a receiving groove 52 is provided on the bottom surface of the yoke 5 , and at least a part of the second magnetic attraction member 8 is located in the receiving groove 52 .

[0055] It can be seen from the above description that the arrangement of the accommodating groove 52 can facilitate the positioning and installation of the second magnetic attraction member 8 and at the same time, can protect the second magnetic attraction member 8 to a certain extent.

[0056] Furthermore, the window 51 is in an arc shape as a whole.

[0057] From the above description, it can be seen that the arc-shaped window 51 can reduce the total area of ​​the window 51 while ensuring that there is a sufficient adjustment area between the first magnetic attraction component 4 and the second magnetic attraction component 8, thereby reducing the influence of the opening of the window 51 on the magnetic conductivity of the yoke 5.

[0058] Furthermore, the voice coil 3 is in a rectangular frame shape as a whole, and there are four windows 51 . Each window 51 is respectively provided with the second magnetic attraction member 8 .

[0059] It can be seen from the above description that the specific shape of the voice coil 3 can be selected and set according to actual needs.

[0060] Embodiment 1

[0061] Please refer to Figures 1 to 3 , Embodiment 1 of the present utility model is: a miniature speaker that can be used in electronic devices such as mobile phones, laptop computers, hearing aids, etc.

[0062] The micro speaker comprises a basin frame 1, a vibration assembly, a magnetic circuit assembly and a second magnetic member 8. The vibration assembly comprises a diaphragm assembly 2, a voice coil 3 and a first magnetic member 4. The diaphragm assembly 2 connects the basin frame 1 and the voice coil 3. The voice coil 3 is frame-shaped as a whole. The first magnetic member 4 is respectively provided at each corner of the voice coil 3. The magnetic circuit assembly connects the basin frame 1. The magnetic circuit assembly comprises a yoke 5 and a central magnetic structure 6 provided on the yoke 5. The yoke 5 has a flange 7. The flange 7 is connected to the basin frame 1. A magnetic gap is formed between the central magnetic structure 6 and the flange 7 for the movement of the voice coil 3. The yoke 5 has a window 51 provided corresponding to the first magnetic member 4. The second magnetic member 8 can be rotatably provided on the bottom surface of the yoke 5 and open and close the window 51. The thickness of the second magnetic member 8 changes around its rotation center axis to achieve the adjustment of the magnetic attraction between the second magnetic member 8 and the first magnetic member 4. The specific connection method between the second magnetic member 8 and the yoke 5 can be riveting, shaft connection, etc.

[0063] It should be noted that the adjustment of the magnetic attraction force can be either the adjustment of the attraction force between the first magnetic attraction component 4 and the second magnetic attraction component 8, or the adjustment of the repulsion force between the first magnetic attraction component 4 and the second magnetic attraction component 8. It is specifically determined by the polarity of the first magnetic attraction component 4 and the second magnetic attraction component 8. Specifically, when the first magnetic attraction component 4 is a first magnet, the second magnetic attraction component 8 can be a soft magnetic body, such as an iron block, or a second magnet. When the first magnetic attraction component 4 is a first magnet and the second magnetic attraction component 8 is a second magnet, the adjustment of the attraction force between the first magnetic attraction component 4 and the second magnetic attraction component 8 can be either the adjustment of the repulsion force; in addition, when the first magnetic attraction component 4 is a soft magnetic body, the second magnetic attraction component 8 is a second magnet.

[0064] In a specific product, the magnetic circuit assembly may further include an edge magnetic structure disposed on the yoke 5. In this case, the edge magnetic structure may replace part or all of the flange 7 of the yoke 5, thereby increasing the B value of the micro-speaker and thus improving the performance of the micro-speaker.

[0065] Optionally, when looking up at the second magnetic member 8, the second magnetic member 8 is sector-shaped as a whole. In other embodiments, when looking up at the second magnetic member 8, the second magnetic member 8 can also be in other shapes, such as polygonal, elliptical, etc.

[0066] In this embodiment, the second magnetic member 8 has a spiral slope structure 81. In other embodiments, the second magnetic member 8 may have a spiral staircase structure or other structures.

[0067] In order to improve the structural strength of the second magnetic component 8 itself and ensure its structural stability, optionally, the second magnetic component 8 has a support wall 82, and the support wall 82 is arranged along the radial direction of the second magnetic component 8 and connected to the edge of the second magnetic component 8. The top of the support wall 82 contacts the bottom surface of the yoke 5. In this way, a static friction force is formed between the support wall 82 and the yoke 5, so that the second magnetic component 8 can maintain a rotation angle relative to the yoke 5, thereby improving the effectiveness of the user's operation of rotating the second magnetic component 8. In a specific product, in order to increase the static friction between the support wall 82 and the yoke 5 bracket, a friction pad that contacts the yoke 5 can be selected at the top of the support wall 82. The friction pad can be felt, rubber pad, etc.

[0068] The first magnetic component 4 is arranged near the window 51. In this embodiment, the vibration assembly also includes a skeleton 9, and the skeleton 9 connects the diaphragm assembly 2 and the first magnetic component 4. Preferably, the inner wall surface or the outer wall surface of the skeleton 9 is connected to the voice coil 3, which can improve the stability of the connection between the voice coil 3 and the diaphragm assembly 2, reduce the risk of the voice coil 3 being separated from the diaphragm assembly 2, and help ensure the structural stability of the vibration assembly. In other embodiments, it is also possible for the first magnetic component 4 to be arranged on the voice coil 3.

[0069] In order to facilitate the positioning and installation of the second magnetic attraction member 8 , a receiving groove 52 is provided on the bottom surface of the yoke 5 , and at least a part of the second magnetic attraction member 8 is located in the receiving groove 52 .

[0070] In this embodiment, the window 51 is in an arc shape as a whole. In other embodiments, the window 51 can also be circular, polygonal or other special shapes.

[0071] In this embodiment, the voice coil 3 is in a rectangular frame shape as a whole, and there are four windows 51 . Each window 51 is provided with a corresponding second magnetic attraction member 8 .

[0072] In summary, the micro-speaker provided by the utility model can adjust the vibration conditions of the local area of ​​the vibration component, thereby improving the phenomenon of inconsistent amplitudes at different positions of the diaphragm component when the micro-speaker vibrates, which is beneficial to improving the acoustic performance of the micro-speaker, and the adjustment operation process is simple.

[0073] The above description is only 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 specification 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 stand; A vibration assembly, the vibration assembly comprising a diaphragm assembly, a voice coil and a first magnetic attraction member, the diaphragm assembly connects the basin frame and the voice coil, the voice coil is frame-shaped as a whole, and each corner of the voice coil is respectively provided with the first magnetic attraction member; A magnetic circuit assembly, the magnetic circuit assembly is connected to the basin frame, the magnetic circuit assembly comprises a yoke, and the yoke has a window arranged corresponding to the first magnetic attraction member; The second magnetic member is rotatably disposed on the bottom surface of the yoke and opens and closes the window. The thickness of the second magnetic member varies around its rotation center axis to adjust the magnetic attraction force between the second magnetic member and the first magnetic member.

2. The micro-speaker according to claim 1, characterized in that: When looking up at the second magnetic attraction member, the second magnetic attraction member is fan-shaped as a whole.

3. The micro-speaker according to claim 1, characterized in that: The second magnetic attraction member has a spiral slope structure.

4. The micro-speaker according to claim 3, characterized in that: The second magnetic attraction member has a supporting wall, and the top of the supporting wall contacts the bottom surface of the yoke.

5. The micro-speaker according to claim 1, characterized in that: The first magnetic attraction member is arranged close to the window.

6. The micro-speaker according to claim 5, characterized in that: The vibration component also includes a frame, and the frame connects the diaphragm component and the first magnetic attraction component.

7. The micro-speaker according to claim 1, characterized in that: The first magnetic attraction component is arranged on the voice coil.

8. The micro-speaker according to claim 1, characterized in that: The bottom surface of the yoke is provided with a receiving groove, and at least a partial area of ​​the second magnetic attraction member is located in the receiving groove.

9. The micro-speaker according to claim 1, characterized in that: The window is in an arc shape as a whole.

10. The micro-speaker according to claim 1, characterized in that: The voice coil is in a rectangular frame shape as a whole, the number of the windows is four, and each of the windows is respectively provided with the second magnetic attraction component.

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