Miniature loudspeaker

By designing the ring -shaped central magnetic structure in the microconent and placing the attentive support film in the empty area, the problem of insufficient the suspended length of the custody tablet is solved, and the high -performance large amplitude design has been achieved. Acoustics performance.

CN222423994UActive Publication Date: 2025-01-28SHENZHEN SUNWAY ACOUSTICS TECH CO LTD
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Patent Information

Application Number
CN202421006829.8
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 adopt large amplitude design, the suspended length of the conducting centering support plate is insufficient, resulting in the performance being unable to be further improved.

Method used

A miniature speaker is designed with a circular frame design of the central magnetic structure, and the attentive support is placed in the hollow area of ​​the central magnetic structure.

Benefits of technology

The high -performance large amplitude design of the miniature speaker has been realized, and the suspended length of the attentive support film is increased, thereby improving the acoustic performance. Because the edge magnetic structure outside the audio rings does not need to avoid the attentive support, the edge magnetic structure is not required. The volume can be larger, which further improves acoustic performance.

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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, the vertical part is located in the hollow area of the central magnetic structure, and the voice coil comprises a body and a lead which are connected; a partial area of the lead is fixed on the horizontal part; the conducting centering disk is located in the hollow area of the center magnetic structure and comprises an outer fixing part, a cantilever part and an inner fixing part which are connected in sequence. The miniature loudspeaker is novel in structure, the conduction centering disk is of a plane structure, processing and manufacturing are convenient, and the overall acoustic performance is good.
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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, the vertical portion is located in the hollow area of ​​the central magnetic structure, the voice coil comprises a connected body and a lead, a partial area of ​​the lead is fixed on the horizontal portion;

[0007] A conductive centering support plate is provided, wherein the conductive centering support plate is located in the hollow area of ​​the central magnetic structure, wherein the conductive centering support plate comprises an outer fixing portion, a cantilever portion and an inner fixing portion which are connected in sequence, wherein the inner fixing portion is fixed to the fixing platform, wherein the outer fixing portion is fixedly connected to the bottom end of the vertical portion, wherein the outer fixing portion has a first soldering pad which is soldered and conductively connected to the lead, and wherein the inner fixing portion has a second soldering pad which is electrically connected to the first soldering pad.

[0008] In one embodiment, a partial area of ​​the lead is fixedly connected to the vertical portion.

[0009] In one embodiment, the vertical portion is provided with a through hole for the lead wire to pass through.

[0010] In one embodiment, the cantilever portion has a plurality of bending segments.

[0011] In one embodiment, the yoke is provided with a clearance groove for avoiding the conductive centering support plate.

[0012] In one embodiment, the number of the conductive centering arms is two, and the two conductive centering arms are axially symmetrical or centrally symmetrical.

[0013] In one embodiment, the skeleton is axisymmetric or centrosymmetric.

[0014] In one embodiment, the central magnetic structure includes an annular central magnetic steel and an annular central washer located above the annular central magnetic steel, and the annular central magnetic steel is fixedly connected to the yoke and the annular central washer respectively.

[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 suspension 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. The conductive centering support is a planar structure, which is convenient for processing and manufacturing.

[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; the fixed connection between the lead and the skeleton can prevent the lead from colliding with the magnetic circuit component, which is beneficial to ensure the sound effect 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 This is a schematic diagram of the internal structure of the micro speaker of the first embodiment of the utility model;

[0025] Figure 4 It is an exploded view of a part of the structure of the micro speaker according to the first embodiment of the present invention.

[0026] Description of Figure Numbers:

[0027] 1. Basin stand;

[0028] 2. Conducting centering support piece; 21. External fixing part; 22. Cantilever part; 23. Internal fixing part;

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

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

[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 part; 82, horizontal part; 83, vertical part; 831, opening;

[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 provided 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, and the vertical portion 83 is located The hollow area of ​​the central magnetic structure 4; the voice coil 7 includes a main body 71 and a lead 72 connected to each other, the top of the main body 71 is connected to the elevated part 81, and a part of the lead 72 is fixed to the horizontal part 82, such as an adhesive connection; the conductive centering support plate 2 is located in the hollow area of ​​the central magnetic structure 4, the conductive centering support plate 2 includes an outer fixing part 21, a cantilever part 22 and an inner fixing part 23 connected in sequence, the inner fixing part 23 is fixed on the fixing platform 31, the outer fixing part 21 is fixedly connected to the bottom end of the vertical part 83, the outer fixing part 21 has a first soldering pad welded and conductive to the lead 72, the inner fixing part 23 has a second soldering pad electrically connected to the first soldering pad, and an external power supply supplies power to the voice coil 7 through the second soldering pad.

[0045] The cantilever portion 22 has a plurality of bending sections, and the bending sections are used to provide deformation margins for the conductive centering support piece 2 .

[0046] 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.

[0047] 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, and the annular central magnetic steel 41 connects the annular central washer 42 and the yoke 3. As a preferred embodiment, the side magnetic structure 5 includes an annular side magnetic steel and an annular washer, the annular washer connects the annular side magnetic steel and the basin frame 1, and the annular side magnetic steel connects the yoke 3, which can enhance the magnetic field of the micro speaker to a greater extent. Of course, in other embodiments, it is also possible for the side magnetic structure 5 to include at least two long strips of side magnetic steel. In this case, the central magnetic structure 4 is located between the two relatively arranged side magnetic steels. In addition, in a specific product, the side magnetic structure 5 can also be replaced by a flange formed by bending the edge of the yoke 3.

[0048] 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.

[0049] To improve the stability of the connection between the lead 72 and the frame 8, optionally, a part of the lead 72 is fixedly connected to the vertical portion 83. In some products, the vertical portion 83 is provided with a through hole 831 for the lead 72 to pass through. For ease of processing, the through hole 831 is preferably a notch structure. Of course, the through hole 831 can also be a through hole structure.

[0050] There are two conductive centering supports 2, and the two conductive centering supports 2 are axially symmetrical or centrally symmetrical; there are two lead wires 72, and the two lead wires 72 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 support 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.

[0051] 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.

[0052] 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.

[0053] 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.

[0054] 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, the vertical portion is located in the hollow area of ​​the central magnetic structure, the voice coil comprises a connected body and a lead, a partial area of ​​the lead is fixed on the horizontal portion; A conductive centering support plate is provided, wherein the conductive centering support plate is located in the hollow area of ​​the central magnetic structure, wherein the conductive centering support plate comprises an outer fixing portion, a cantilever portion and an inner fixing portion which are connected in sequence, wherein the inner fixing portion is fixed to the fixing platform, wherein the outer fixing portion is fixedly connected to the bottom end of the vertical portion, wherein the outer fixing portion has a first soldering pad which is soldered and conductively connected to the lead, and wherein the inner fixing portion has a second soldering pad which is electrically connected to the first soldering pad.

2. The micro-speaker according to claim 1, characterized in that: A partial area of ​​the lead is fixedly connected to the vertical portion.

3. The micro-speaker according to claim 1, characterized in that: The vertical portion is provided with a through hole for the lead wire to pass through.

4. The micro-speaker according to claim 1, characterized in that: The cantilever portion has a plurality of bending sections.

5. 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.

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

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

8. The micro-speaker according to claim 1, characterized in that: The central magnetic structure includes an annular central magnetic steel and an annular central washer located above the annular central magnetic steel. The annular central magnetic steel is fixedly connected to the yoke and the annular central washer respectively.

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 electrical conductive structure is electrically isolated from the yoke iron by the insulating rubber block.