Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a lower vibrating diaphragm, an upper vibrating diaphragm and a centering disk, the lower vibrating diaphragm comprises a lower inner fixing part, a lower folding ring part and a lower outer fixing part which are sequentially connected from inside to outside, and the lower folding ring protrudes downwards; the upper vibrating diaphragm comprises an upper inner fixing part, an upper folding ring part and an upper outer fixing part which are sequentially connected from inside to outside, and the upper folding ring protrudes upwards and is arranged opposite to the lower folding ring; the centering disk is located between the upper vibrating diaphragm and the lower vibrating diaphragm and comprises an inner mounting part, a cantilever part and an outer mounting part which are sequentially connected from inside to outside, the inner mounting part is respectively connected with the upper inner fixing part and the lower inner fixing part, the outer mounting part is respectively connected with the upper outer fixing part and the lower outer fixing part, and the cantilever part is connected with the upper outer fixing part and the lower outer fixing part. And the cantilever part is arranged corresponding to the lower folding ring. The miniature loudspeaker is novel in structure and excellent in performance.

Description

Technical Field

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

[0002] Micro 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, the micro speakers used are becoming more and more popular, such as large-amplitude speakers or ultra-linear speakers.

[0003] With the development of society, the thickness of micro speakers is getting smaller and smaller, and their performance has attenuated to a certain extent. In conventional super-linear micro speakers, the centering supports are set at the four corners of the micro speaker. The centering supports set at the four corners need to occupy the setting space of the magnetic steel, which undoubtedly affects the magnetic field strength of the micro speaker, resulting in unsatisfactory performance of the micro speaker. Utility Model Content

[0004] The technical problem solved by the utility model is to provide a high-performance micro loudspeaker.

[0005] In order to solve the above technical problems, the technical solution adopted by the present invention is: a micro speaker, comprising:

[0006] A lower diaphragm, the lower diaphragm comprising a lower inner fixing portion, a lower folding ring portion, and a lower outer fixing portion connected in sequence from the inside to the outside, the lower folding ring protruding downward;

[0007] An upper diaphragm, the upper diaphragm comprising an upper inner fixing portion, an upper folding ring portion, and an upper outer fixing portion sequentially connected from the inside to the outside, the upper folding ring protruding upward and arranged opposite to the lower folding ring;

[0008] A centering support plate is located between the upper diaphragm and the lower diaphragm, and includes an inner mounting portion, a cantilever portion, and an outer mounting portion sequentially connected from the inside to the outside. The inner mounting portion is respectively connected to the upper inner fixing portion and the lower inner fixing portion, and the outer mounting portion is respectively connected to the upper outer fixing portion and the lower outer fixing portion, and the cantilever portion is arranged corresponding to the lower folding ring.

[0009] In one embodiment, the lower inner fixing portion is provided with a first exposure opening, the upper outer fixing portion or the lower outer fixing portion is provided with a second exposure opening, the inner mounting portion has an inner solder pad, the inner solder pad is exposed through the first exposure opening, the outer mounting portion has an outer solder pad, the outer solder pad is exposed through the second exposure opening, and the outer solder pad is electrically connected to the inner solder pad.

[0010] In one embodiment, the upper inner fixing portion is provided with a first window, the inner mounting portion is provided with a second window communicating with the first window, and the lower inner fixing portion is provided with a third window communicating with the second window.

[0011] In one embodiment, a spherical top is further included, and the spherical top is arranged on the top surface of the upper inner fixing portion and closes the first window.

[0012] In one embodiment, a spherical top is further included, and the spherical top is arranged on the bottom surface of the lower inner fixing portion and closes the third window.

[0013] In one embodiment, a relief opening is provided on the top of the ball.

[0014] In one embodiment, a voice coil is further included, and the voice coil is connected to the dome.

[0015] In one embodiment, it also includes a basin frame and a magnetic circuit assembly connected to the basin frame, the lower external fixing portion is connected to the basin frame, the magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively arranged on the yoke, the side magnetic structure is in the shape of a continuous ring frame as a whole, and the side magnetic structure is arranged around the central magnetic structure.

[0016] In one embodiment, the edge magnetic structure includes edge magnetic steel and an annular washer, the edge magnetic steel connects the annular washer and the yoke, and the annular washer is in a continuous ring frame shape.

[0017] In one embodiment, the edge magnetic steel is in a continuous ring frame shape, or the edge magnetic steel includes a plurality of sub-magnetic steels, and the plurality of sub-magnetic steels are arranged in a ring frame shape, and two adjacent sub-magnetic steels are in contact with each other.

[0018] The beneficial effects of the present invention are as follows: the micro-speaker has a novel structure. Compared with the existing micro-speakers, the centering supports and pads located at the four corners of the micro-speaker are eliminated. A dual-diaphragm structure is adopted, and the centering supports are sandwiched between the two diaphragms, which can better suppress the rolling vibration phenomenon, so that the micro-speaker can achieve super-linearity at a higher level; and the centering supports are placed between the two diaphragms, so that the side magnetic structure of the micro-speaker can adopt a complete annular magnetic circuit, which is conducive to increasing the total volume of the magnetic steel in the micro-speaker, improving the BL value of the micro-speaker, and thereby improving the performance of the micro-speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0019] In order to more clearly illustrate the embodiments of the present invention or the technical solutions in the prior art, the following briefly introduces the drawings required for use in the embodiments or the description of the prior art. Obviously, the drawings described below are only some embodiments of the present invention. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying any creative work.

[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] Figure 3 This is an exploded view of a portion of the structure of the micro-speaker according to the first embodiment of the present invention.

[0023] Description of Figure Numbers:

[0024] 1. Basin rack;

[0025] 2. Magnetic circuit assembly; 21. Yoke; 22. Center magnetic structure; 221. Center magnetic steel; 222. Center washer; 23. Side magnetic structure; 231. Side magnetic steel; 232. Ring washer;

[0026] 3. Voice coil;

[0027] 4. Lower diaphragm; 41. Lower inner fixing portion; 42. Lower folding ring portion; 43. Lower outer fixing portion; 44. First exposure opening; 45. Second exposure opening;

[0028] 5. Upper diaphragm; 51. Upper inner fixing portion; 52. Upper folding ring portion; 53. Upper outer fixing portion;

[0029] 6. Centering support; 61. Inner mounting portion; 62. Cantilever portion; 63. Outer mounting portion;

[0030] 7. Top of the ball; 71. Avoidance. DETAILED DESCRIPTION

[0031] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] It should be noted that if the embodiments of the present invention involve directional indications such as up, down, left, right, front, back, etc., then the directional indications are only used to explain the relative position relationship, movement status, etc. between the various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., 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 the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0035] In addition, if the word "and / or" appears throughout the text, it means that three parallel solutions are included. For example, "and / or" includes solutions, or solutions, or solutions that meet all of the requirements simultaneously. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0036] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0037] Example 1

[0038] Please refer to Figures 1 to 3, Embodiment 1 of the present utility model is: a micro speaker, including a basin frame 1, a magnetic circuit component 2, a voice coil 3, a lower diaphragm 4, an upper diaphragm 5 and a centering support plate 6, the magnetic circuit component 2 is connected to the basin frame 1, the magnetic circuit component 2 includes a yoke 21 and a central magnetic structure 22 and a side magnetic structure 23 respectively arranged on the yoke 21, the side magnetic structure 23 is in the shape of a continuous ring frame as a whole, the side magnetic structure 23 is arranged around the central magnetic structure 22, a magnetic gap is formed between the central magnetic structure 22 and the side magnetic structure 23, and the side magnetic structure 23 is connected to the basin frame 1; the lower diaphragm 4 includes a lower inner fixing part 41, a lower folding ring part 42 and a lower outer fixing part 43 connected in sequence from the inside to the outside, the lower folding ring protrudes downward, the lower outer fixing part 43 is connected to the basin frame 1, the voice coil 3 It is connected to the lower inner fixing part 41 and is arranged corresponding to the magnetic gap; the upper diaphragm 5 includes an upper inner fixing part 51, an upper folding ring part 52 and an upper outer fixing part 53 connected in sequence from the inside to the outside, and the upper folding ring protrudes upward and is arranged opposite to the lower folding ring; the centering support piece 6 is located between the upper diaphragm 5 and the lower diaphragm 4, and the centering support piece 6 includes an inner mounting part 61, a cantilever part 62 and an outer mounting part 63 connected in sequence from the inside to the outside, the inner mounting part 61 is respectively connected to the upper inner fixing part 51 and the lower inner fixing part 41, the outer mounting part 63 is respectively connected to the upper outer fixing part 53 and the lower outer fixing part 43, and the cantilever part 62 is arranged corresponding to the lower folding ring, that is, the cantilever part 62 is located in the space enclosed by the upper folding ring part 52 and the lower folding ring part 42.

[0039] Specifically, the bottom surface of the upper inner fixing portion 51 is connected to the top surface of the inner mounting portion 61, the top surface of the lower inner fixing portion 41 is connected to the bottom surface of the inner mounting portion 61, the bottom surface of the upper outer fixing portion 53 is connected to the top surface of the outer mounting portion 63, and the top surface of the lower outer fixing portion 43 is connected to the bottom surface of the outer mounting portion 63.

[0040] The central magnetic structure 22 includes a central magnetic steel 221 and a central washer 222, and the central magnetic steel 221 connects the yoke 21 and the central washer 222; the side magnetic structure 23 includes a side magnetic steel 231 and an annular washer 232, and the side magnetic steel 231 connects the annular washer 232 and the yoke 21, and the annular washer 232 is in a continuous ring frame shape. In this embodiment, the side magnetic steel 231 is in a continuous ring frame shape. In other embodiments, the side magnetic steel 231 includes a plurality of sub-magnets, and the plurality of sub-magnets are arranged in a ring frame shape, and two adjacent sub-magnets are in contact with each other.

[0041] In this embodiment, the centering support plate 6 not only suppresses rolling vibration, but also serves to conduct external power supply and the voice coil 3. In detail, the lower inner fixing portion 41 is provided with a first exposure opening 44, and the upper outer fixing portion 53 or the lower outer fixing portion 43 is provided with a second exposure opening 45. The inner mounting portion 61 has an inner pad, which is exposed through the first exposure opening 44. The outer mounting portion 63 has an outer pad, which is exposed through the second exposure opening 45. The outer pad is electrically connected to the inner pad, and the lead of the voice coil 3 is welded and conducted to the inner pad.

[0042] In order to improve the sensitivity of the micro speaker, a first window is provided on the upper inner fixing portion 51, a second window connected to the first window is provided on the inner mounting portion 61, and a third window connected to the second window is provided on the lower inner fixing portion 41. The first window, the second window and the third window are aligned.

[0043] In some embodiments, the microspeaker further includes a dome 7, which is disposed on the top surface of the upper inner fixing portion 51 and closes the first window. In this embodiment, the dome 7 is disposed on the bottom surface of the lower inner fixing portion 41 and closes the third window. Furthermore, the dome 7 is provided with a relief opening 71, which is used to avoid the leads of the voice coil 3, thereby allowing the leads of the voice coil 3 to be soldered to the inner pad. Specifically, the voice coil 3 is connected to the dome 7, that is, the voice coil 3 is indirectly connected to the lower inner fixing portion 41 through the dome 7.

[0044] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application in other related technical fields are included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: include A lower diaphragm, the lower diaphragm comprising a lower inner fixing portion, a lower folding ring portion, and a lower outer fixing portion connected in sequence from the inside to the outside, the lower folding ring protruding downward; An upper diaphragm, the upper diaphragm comprising an upper inner fixing portion, an upper folding ring portion, and an upper outer fixing portion sequentially connected from the inside to the outside, the upper folding ring protruding upward and arranged opposite to the lower folding ring; A centering support plate is located between the upper diaphragm and the lower diaphragm, and includes an inner mounting portion, a cantilever portion, and an outer mounting portion sequentially connected from the inside to the outside. The inner mounting portion is respectively connected to the upper inner fixing portion and the lower inner fixing portion, and the outer mounting portion is respectively connected to the upper outer fixing portion and the lower outer fixing portion, and the cantilever portion is arranged corresponding to the lower folding ring.

2. The micro-speaker according to claim 1, wherein: The lower inner fixing portion is provided with a first exposure opening, the upper outer fixing portion or the lower outer fixing portion is provided with a second exposure opening, the inner mounting portion has an inner solder pad, the inner solder pad is exposed through the first exposure opening, the outer mounting portion has an outer solder pad, the outer solder pad is exposed through the second exposure opening, and the outer solder pad is electrically connected to the inner solder pad.

3. The micro-speaker according to claim 1, wherein: The upper inner fixing portion is provided with a first window, the inner mounting portion is provided with a second window communicating with the first window, and the lower inner fixing portion is provided with a third window communicating with the second window.

4. The micro-speaker according to claim 3, wherein: It also includes a spherical top, which is arranged on the top surface of the upper inner fixing part and closes the first window.

5. The micro-speaker according to claim 3, wherein: It also includes a spherical top, which is arranged on the bottom surface of the lower inner fixing part and closes the third window.

6. The micro-speaker according to claim 5, wherein: A avoidance opening is provided on the top of the ball.

7. The micro-speaker according to claim 5, wherein: Also included is a voice coil connected to the dome.

8. The micro-speaker according to claim 1, wherein: It also includes a basin frame and a magnetic circuit assembly connected to the basin frame. The lower external fixed part is connected to the basin frame. The magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively arranged on the yoke. The side magnetic structure is in the shape of a continuous ring frame as a whole, and the side magnetic structure is arranged around the central magnetic structure.

9. The micro-speaker according to claim 8, wherein: The edge magnetic structure includes edge magnetic steel and an annular washer. The edge magnetic steel connects the annular washer and the yoke iron. The annular washer is in a continuous ring frame shape.

10. The micro-speaker according to claim 9, wherein: The edge magnetic steel is in a continuous ring frame shape, or the edge magnetic steel includes a plurality of sub-magnetic steels, and the plurality of sub-magnetic steels are arranged in a ring frame shape, and two adjacent sub-magnetic steels are in contact with each other.

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