Miniature loudspeaker

By designing the ring frame -like magnetic structure and skeleton structure in the microconent, the spatial space is placed and the concentrated support film is used to increase the edge magnetic structure. The design problem has achieved the improvement of high -performance and rigid effects.

CN222423998UActive Publication Date: 2025-01-28SHENZHEN SUNWAY ACOUSTICS TECH CO LTD
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Patent Information

Application Number
CN202421011219.7
Authority / Receiving Office
CN · China
Patent Type
Utility models(China)
Current Assignee / Owner
Filing Date
2024-05-10
Publication Date
2025-01-28
Estimated Expiration
2034-05-10

AI Technical Summary

Technical Problem

When existing micro speakers use large voice coil and large amplitude design, they cannot place the conducting centering support at the same time, resulting in limited performance improvement.

Method used

A micro speaker is designed with a circular frame -shaped center magnetic structure and skeleton structure. The position of the audio rings is adjusted through the skeleton to make the space out of the space. Essence

Benefits of technology

The high -performance large amplitude design of the mini speaker is realized, and the acoustic performance is improved, while the effectiveness and performance of the magnetic field are ensured.

✦ Generated by Eureka AI based on patent content.

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Abstract

The utility model discloses a miniature loudspeaker, which comprises a magnetic circuit assembly, a vibration assembly and a conduction centering disk, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the whole central magnetic structure is in a ring frame shape, the yoke is provided with a fixed table, and the fixed table is located in a hollow area of the central magnetic structure; the vibration assembly comprises a diaphragm assembly, a voice coil and a framework, the voice coil is connected with the diaphragm assembly through the framework, the framework comprises an elevated part, a horizontal part and a vertical part which are connected in sequence, the elevated part is located between the diaphragm assembly and the voice coil, and the vertical part is located in the hollow area of the central magnetic structure; the conducting centering disk comprises an outer fixing part, a cantilever part and an inner fixing part which are connected in sequence, the inner fixing part is fixed on the fixing table, the outer fixing part comprises a first fixing part and a second fixing part which are vertically connected, the first fixing part is connected with the cantilever part, and the second fixing part is located below the horizontal part and connected with the horizontal part. The miniature loudspeaker is novel in structure and good in acoustic performance.
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Description

Technical Field

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

[0002] In order to improve the performance of micro speakers, existing micro speakers mostly adopt large voice coils and large amplitude structure designs. Some micro speakers are provided with conductive centering supports, which have the functions of conducting the voice coil and the external power supply and correcting the voice coil to improve the rolling vibration of the voice coil. In the prior art, the conductive centering supports are generally located on the outside of the voice coil. When the micro speaker adopts a large amplitude design, the conductive centering supports must have sufficient suspended length to avoid stress concentration and wire breakage. However, in micro speakers with a large voice coil structure, insufficient space is left on the outside of the voice coil, and thus it is impossible to place side magnets or conductive centering supports, resulting in the inability to further improve the performance. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a high-performance large-amplitude micro-speaker.

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

[0005] A magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure being in the shape of a ring frame as a whole, a fixing platform being arranged on the yoke, and the fixing platform being located in a hollow area of ​​the central magnetic structure;

[0006] A vibration assembly, the vibration assembly comprising a diaphragm assembly, a voice coil and a frame, the voice coil is connected to the diaphragm assembly through the frame, the frame comprises a raised portion, a horizontal portion and a vertical portion connected in sequence, the raised portion is located between the diaphragm assembly and the voice coil, and the vertical portion is located in the hollow area of ​​the central magnetic structure;

[0007] A conductive centering support plate, wherein the conductive centering support plate includes an outer fixing portion, a cantilever portion and an inner fixing portion connected in sequence, wherein the inner fixing portion is fixed to the fixing platform, and the outer fixing portion includes a first fixing portion and a second fixing portion connected vertically, wherein the first fixing portion is connected to the cantilever portion, and the second fixing portion is located below the horizontal portion and connected to the horizontal portion, wherein the second fixing portion is provided with a first soldering pad electrically connected to the voice coil, and the inner fixing portion is provided with a second soldering pad electrically connected to the first soldering pad.

[0008] In one embodiment, the voice coil includes a body and a lead connected to each other, and the lead is welded to the first pad.

[0009] In one embodiment, an inner edge of the top of the central magnetic structure has an escape groove for escaping the connection area between the lead and the first pad.

[0010] In one embodiment, the first fixing portion is fixedly connected to the vertical portion.

[0011] In one embodiment, the cantilever portion has a connecting end portion, the cantilever portion is connected to the first fixing portion via the connecting end portion, the connecting end portion is perpendicular to the first fixing portion, and the connecting end portion is fixedly connected to the bottom end of the vertical portion.

[0012] In one embodiment, the yoke is provided with a clearance groove for avoiding the conductive centering support plate.

[0013] In one embodiment, the number of the conductive centering arms is two, and the two conductive centering arms are axially symmetrical or centrally symmetrical.

[0014] In one embodiment, the skeleton is axisymmetric or centrosymmetric.

[0015] In one embodiment, the fixing platform is provided with a via hole and further includes an electrical conductive structure, the electrical conductive structure passes through the via hole and is electrically connected to the second pad, and a partial area of ​​the electrical conductive structure is exposed outside the yoke.

[0016] In one embodiment, an insulating rubber block is provided in the via hole, and the electrically conductive structure is electrically isolated from the yoke by the insulating rubber block.

[0017] The beneficial effects of the utility model are:

[0018] The micro speaker has a novel structure. The micro speaker can simultaneously adopt a large voice coil and a large amplitude design architecture. While the voice coil can be maximized, the conductive centering support can also have a sufficient suspended length, thereby effectively improving the acoustic performance of the micro speaker. At the same time, since the side magnetic structure outside the voice coil does not need to avoid the conductive centering support, the overall volume of the side magnetic structure can be set larger, thereby further improving the acoustic performance of the micro speaker.

[0019] The utilization rate of the magnetic flux lines in the central area of ​​the central magnetic structure is relatively low. Hollowing out the central area of ​​the central magnetic structure has little effect on the magnetic field of the micro-speaker itself, which is beneficial to ensuring the performance of the micro-speaker.

[0020] The skeleton can adjust the depth of the voice coil extending into the magnetic gap, which is beneficial to further improve the performance of the micro speaker. BRIEF DESCRIPTION OF THE DRAWINGS

[0021] In order to more clearly illustrate the embodiments of the utility model or the technical solutions in the prior art, the drawings required for use in the embodiments or the description of the prior art will be briefly introduced below. Obviously, the drawings described below are only some embodiments of the utility model. For ordinary technicians in this field, other drawings can be obtained based on the structures shown in these drawings without paying creative work.

[0022] Figure 1 An exploded view of the micro speaker of the first embodiment of the utility model;

[0023] Figure 2 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0024] Figure 3 The structure diagram of the micro speaker of the first embodiment of the present invention is as follows: Figure 1 ;

[0025] Figure 4 The structure diagram of the micro speaker of the first embodiment of the present invention is as follows: Figure 2 .

[0026] Description of Figure Numbers:

[0027] 1. Basin stand;

[0028] 2. Conductive centering support; 21. External fixing portion; 211. First fixing portion; 212. Second fixing portion; 2121. First pad; 22. Cantilever portion; 23. Internal fixing portion; 24. Connecting end portion;

[0029] 3. Yoke iron; 31. Fixed platform;

[0030] 4. Center magnetic structure; 41. Ring-shaped center magnetic steel; 42. Ring-shaped center washer; 43. Avoidance groove;

[0031] 5. Edge magnetic structure;

[0032] 6. Diaphragm assembly; 61. Sound film; 62. Dome;

[0033] 7. Voice coil; 71. Body; 72. Lead wire;

[0034] 8. frame; 81. elevated portion; 82. horizontal portion; 83. vertical portion;

[0035] 9. Electrically conductive structure;

[0036] 10. Insulating rubber block. DETAILED DESCRIPTION

[0037] The purpose, features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the accompanying drawings.

[0038] The following will be combined with the drawings in the embodiments of the utility model to clearly and completely describe the technical solutions in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all of the embodiments. Based on the embodiments of the utility model, all other embodiments obtained by ordinary technicians in this field without creative work are within the scope of protection of the utility model.

[0039] 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 components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indication will also change accordingly.

[0040] In addition, if there are descriptions involving "first", "second", etc. in the embodiments of the utility model, the descriptions of "first", "second", etc. are only used for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features defined as "first" or "second" may explicitly or implicitly include at least one of the features.

[0041] In addition, if the meaning of "and / or" appears in the full text is to include three parallel solutions, taking "and / or" as an example, it includes solutions, or solutions, or solutions that are satisfied at the same time. In addition, the technical solutions between the various embodiments can be combined with each other, but it must be based on the ability of ordinary technicians in this field to implement. 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 required by this utility model.

[0042] In this application, unless otherwise clearly specified and limited, the terms "installed", "connected", "connected", "fixed" and the like should be understood in a broad sense, for example, it can be a fixed connection, a detachable connection, or an integral connection; it can be a mechanical connection or an electrical connection; it can be a direct connection or an indirect connection through an intermediate medium, it can be the internal connection of two elements or the interaction relationship between two elements. For ordinary technicians in this field, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0043] Embodiment 1

[0044] Please refer to Figures 1 to 4, Embodiment 1 of the present utility model is: a micro speaker, comprising a basin frame 1, a magnetic circuit assembly, a vibration assembly and a conductive centering support plate 2, wherein the magnetic circuit assembly and the vibration assembly are respectively fixedly connected to the basin frame 1, the magnetic circuit assembly comprises a yoke 3 and a central magnetic structure 4 and a side magnetic structure 5 respectively arranged on the yoke 3, the central magnetic structure 4 is in the shape of a ring frame as a whole, a fixing platform 31 is arranged on the yoke 3, and the fixing platform 31 is located in the hollow area of ​​the central magnetic structure 4; the vibration assembly comprises a diaphragm assembly 6, a voice coil 7 and a skeleton 8, the voice coil 7 is connected to the diaphragm assembly 6 through the skeleton 8, the skeleton 8 comprises a raised portion 81, a horizontal portion 82 and a vertical portion 83 connected in sequence, the raised portion 81 is located between the diaphragm assembly 6 and the voice coil 7 The vertical portion 83 is located in the hollow area of ​​the central magnetic structure 4; the conductive centering support plate 2 includes an outer fixing portion 21, a cantilever portion 22 and an inner fixing portion 23 connected in sequence, the inner fixing portion 23 is fixed on the fixing platform 31, the outer fixing portion 21 includes a first fixing portion 211 and a second fixing portion 212 connected vertically, the first fixing portion 211 is connected to the cantilever portion 22, the second fixing portion 212 is located below the horizontal portion 82 and connected to the horizontal portion 82, the second fixing portion 212 is provided with a first soldering pad 2121 electrically connected to the voice coil 7, the inner fixing portion 23 is provided with a second soldering pad electrically connected to the first soldering pad 2121, and an external power supply supplies power to the voice coil 7 through the second soldering pad.

[0045] In the present embodiment, the diaphragm assembly 6 includes a sound membrane 61 and a dome 62 arranged on the sound membrane 61. In other embodiments, the diaphragm assembly 6 may only have the sound membrane 61 but not the dome 62. The specific selection and setting can be made according to actual needs. As a preferred implementation, the horizontal portion 82 and the sound membrane 61 are located on the same side of the dome 62 and are fixedly connected to the dome 62 respectively. This can make the cross-sectional height of the micro speaker lower.

[0046] As a preferred embodiment, the edge magnetic structure 5 includes an annular edge magnetic steel and an annular washer, the annular washer connects the annular edge magnetic steel and the basin frame 1, and the annular edge magnetic steel connects the yoke 3, so that the magnetic field of the micro speaker can be enhanced to a greater extent. Of course, in other embodiments, it is also possible for the edge magnetic structure 5 to include at least two long strips of edge magnetic steel. In this case, the central magnetic structure 4 is located between the two oppositely arranged edge magnetic steels. In addition, in a specific product, the edge magnetic structure 5 can also be replaced by a flange formed by bending the edge of the yoke 3.

[0047] The voice coil 7 includes a main body 71 and a lead 72 connected to each other. The lead 72 is welded to the first pad 2121 . In detail, the top of the main body 71 is connected to the elevated portion 81 .

[0048] The central magnetic structure 4 includes an annular central magnetic steel 41 and an annular central washer 42 located above the annular central magnetic steel 41. The annular central magnetic steel 41 connects the annular central washer 42 and the yoke 3. In order to avoid the vibration component colliding with the central magnetic structure 4 and generating noise when the micro speaker is working, preferably, the inner edge of the top of the central magnetic structure 4 has an avoidance groove 43 for avoiding the connection area between the lead 72 and the first solder pad 2121. The avoidance groove 43 can be a pressed groove provided on the annular central washer 42, or a step groove formed at the connection between the annular central washer 42 and the annular central magnetic steel 41. If necessary, a part of the avoidance groove 43 can also be located on the annular central magnetic steel 41, that is, at this time, the avoidance groove 43 extends downward to the annular central magnetic steel 41.

[0049] In order to form a more stable combination between the frame 8 and the conductive centering support plate 2 , the first fixing portion 211 is fixedly connected to the vertical portion 83 .

[0050] Optionally, the cantilever portion 22 has a connecting end portion 24, and the cantilever portion 22 is connected to the first fixed portion 211 via the connecting end portion 24. The connecting end portion 24 is perpendicular to the first fixed portion 211, and the connecting end portion 24 is fixedly connected to the bottom end of the vertical portion 83. In this way, the bonding area between the skeleton 8 and the conductive centering support plate 2 can be increased to a greater extent, thereby improving the bonding force between the two.

[0051] Optionally, the yoke 3 is provided with a clearance groove for avoiding the conductive centering support plate 2, so as to avoid the conductive centering support plate 2 and the yoke 3 from colliding during the operation of the micro speaker.

[0052] There are two conductive centering supports 2, and the two conductive centering supports 2 are axially symmetrical or centrally symmetrical; the frame 8 is axially symmetrical or centrally symmetrical. In this way, the traction force of the conductive centering supports 2 on the vibration component can be symmetrically balanced, avoiding the vibration component being unbalanced due to the influence of the traction force, thereby causing rolling vibration.

[0053] The fixing platform 31 is provided with a via hole, and the micro speaker also includes an electrical conductive structure 9, which passes through the via hole and is electrically connected to the second pad, and a part of the electrical conductive structure 9 is exposed to the yoke 3. The electrical conductive structure 9 can be an electric wire, a metal conductive structure, etc., and an external power supply supplies power to the voice coil 7 via the electrical conductive structure 9 and the conductive centering support plate 2.

[0054] Furthermore, an insulating rubber block 10 is provided in the via hole, and the electrically conductive structure 9 is electrically isolated from the yoke 3 by the insulating rubber block 10. When the electrically conductive structure 9 is a metal conductive structural component, the electrically conductive structure 9 and the insulating rubber block 10 are preferably an integrated structure formed by insert injection molding.

[0055] In this embodiment, the fixing platform 31 is formed by stamping a partial area of ​​the yoke 3. In other embodiments, the fixing platform 31 and the yoke 3 can also be a split structure. In this case, in some products, the insulating rubber block 10 itself can be identified as the fixing platform 31.

[0056] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention. All equivalent structural changes made by using the contents of the present invention specification and drawings under the utility model concept, or directly / indirectly used 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 magnetic circuit assembly, the magnetic circuit assembly comprising a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure being in the shape of a ring frame as a whole, a fixing platform being arranged on the yoke, and the fixing platform being located in a hollow area of ​​the central magnetic structure; A vibration assembly, the vibration assembly comprising a diaphragm assembly, a voice coil and a frame, the voice coil is connected to the diaphragm assembly through the frame, the frame comprises a raised portion, a horizontal portion and a vertical portion connected in sequence, the raised portion is located between the diaphragm assembly and the voice coil, and the vertical portion is located in the hollow area of ​​the central magnetic structure; A conductive centering support plate, wherein the conductive centering support plate includes an outer fixing portion, a cantilever portion and an inner fixing portion connected in sequence, wherein the inner fixing portion is fixed to the fixing platform, and the outer fixing portion includes a first fixing portion and a second fixing portion connected vertically, wherein the first fixing portion is connected to the cantilever portion, and the second fixing portion is located below the horizontal portion and connected to the horizontal portion, wherein the second fixing portion is provided with a first soldering pad electrically connected to the voice coil, and the inner fixing portion is provided with a second soldering pad electrically connected to the first soldering pad.

2. The micro-speaker according to claim 1, characterized in that: The voice coil includes a body and a lead wire connected to each other, and the lead wire is welded to the first pad.

3. The micro-speaker according to claim 2, characterized in that: The inner edge of the top of the central magnetic structure has an escape groove for escaping the connection area between the lead and the first pad.

4. The micro-speaker according to claim 1, characterized in that: The first fixing portion is fixedly connected to the vertical portion.

5. The micro-speaker according to claim 1, characterized in that: The cantilever portion has a connecting end portion, the cantilever portion is connected to the first fixing portion via the connecting end portion, the connecting end portion is perpendicular to the first fixing portion, and the connecting end portion is fixedly connected to the bottom end of the vertical portion.

6. The micro-speaker according to claim 1, characterized in that: The yoke is provided with a clearance groove for avoiding the conduction centering support piece.

7. The micro-speaker according to claim 1, characterized in that: The number of the conductive centering arms is two, and the two conductive centering arms are axially symmetrical or centrally symmetrical.

8. The micro-speaker according to claim 1, characterized in that: The skeleton is axisymmetric or centrosymmetric.

9. The micro-speaker according to claim 1, characterized in that: The fixing platform is provided with a via hole and also includes an electrical conductive structure, the electrical conductive structure passes through the via hole and is electrically connected to the second pad, and a partial area of ​​the electrical conductive structure is exposed outside the yoke.

10. The micro-speaker according to claim 9, characterized in that: An insulating rubber block is arranged in the via hole, and the electrically conductive structure is electrically isolated from the yoke iron by the insulating rubber block.