Miniature loudspeaker

Abstract

The miniature loudspeaker comprises a vibration assembly, an upper magnetic circuit assembly, a lower magnetic circuit assembly, a camera assembly and an outer magnetic circuit assembly, the vibration assembly comprises a middle paste, an upper voice coil, a lower voice coil, an upper vibrating diaphragm and a lower vibrating diaphragm, the upper vibrating diaphragm and the lower vibrating diaphragm are respectively in an annular shape, the upper voice coil and the lower voice coil are respectively connected with the middle paste, and the lower voice coil is connected with the camera assembly. The middle paste is located between the upper voice coil and the lower voice coil, the upper voice coil is connected with the upper diaphragm, and the lower voice coil is connected with the lower diaphragm; the upper magnetic circuit assembly comprises an upper magnetic conductive cover and an upper center magnetic structure which are connected, the upper center magnetic structure comprises annular magnetic steel and an upper center washer which are connected, the upper center washer is provided with a turned-over edge and an upper washer through hole, the turned-over edge is located in the annular magnetic steel, and high pitch magnetic steel is arranged on the side, away from the middle patch, of the upper center washer. And the high-pitch magnetic steel is positioned between at least one group of two flanges which are oppositely arranged. The miniature loudspeaker is novel in structure, integrates the camera assembly, and realizes high integration of devices; the sound pressure level is high and the acoustic performance is good.

Description

Technical Field

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

[0002] With the rapid development of the consumer electronics industry, especially smartphones, end consumers have increasingly higher demands for device usage experience.

[0003] At present, electronic terminal devices such as smart phones are on the road to becoming thinner and lighter. Speakers and cameras have become indispensable components in smart phones and other electronic terminal devices. In the existing technology, speakers and cameras are often set separately, which will undoubtedly occupy a lot of space inside smart phones and other electronic terminal devices, affecting the thinness and lightness of smart phones and other electronic terminal devices. In addition, the sound pressure level of existing speakers is also unsatisfactory, and there is a need for further improvement. Utility Model Content

[0004] The problem solved by the utility model is to provide a high-performance micro speaker with a shooting function.

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

[0006] A vibration component, the vibration component includes a middle sticker, an upper voice coil, a lower voice coil, an upper diaphragm and a lower diaphragm, the upper diaphragm and the lower diaphragm are respectively ring-shaped, the upper voice coil and the lower voice coil are respectively connected to the middle sticker, the middle sticker is located between the upper voice coil and the lower voice coil, the upper voice coil is connected to the upper diaphragm, and the lower voice coil is connected to the lower diaphragm;

[0007] An upper magnetic circuit component, the upper magnetic circuit component includes an upper magnetic shield and an upper center magnetic structure connected to each other, the upper center magnetic structure includes an upper annular magnetic steel and an upper center washer connected to each other, the upper center washer has a flange and an upper washer through hole, the flange is located in the upper annular magnetic steel, the upper center washer is provided with an upper magnetic steel on a side away from the middle sticker, the upper magnetic steel is located between at least one group of two relatively arranged flanges, the upper magnetic shield is connected to the upper diaphragm, the upper magnetic shield is provided with a window and an upper magnetic shield through hole connected to the upper washer through hole, an upper diaphragm component is provided at the window, the upper diaphragm component is connected to an upper voice coil, and the upper voice coil is arranged corresponding to the gap between the upper magnetic steel and the flange;

[0008] A lower magnetic circuit assembly, the lower magnetic circuit assembly comprising a lower magnetic conductive cover and a lower central magnetic structure connected to each other, the lower magnetic conductive cover being connected to the lower diaphragm, the lower magnetic circuit assembly having an installation cavity, the lower magnetic conductive cover having a window communicating with the installation cavity, and the middle sticker being located between the upper central magnetic structure and the lower central magnetic structure;

[0009] A camera assembly, wherein the camera assembly is installed in the installation cavity;

[0010] The external magnetic circuit component includes an annular external magnetic steel, an upper annular magnetic conductive bracket and a lower annular magnetic conductive bracket. The upper annular magnetic conductive bracket connects the annular external magnetic steel and the upper diaphragm, and the lower annular magnetic conductive bracket connects the annular external magnetic steel and the lower diaphragm.

[0011] In one embodiment, the lower center magnetic structure includes a connected lower annular magnetic steel and a lower center washer, the top of the camera assembly abuts against the lower center washer, and the lower part of the camera assembly has a lower abutting portion that abuts against the lower magnetic conductive cover.

[0012] In one embodiment, the camera assembly is not arranged to protrude from the bottom surface of the upper magnetic conductive cover.

[0013] In one embodiment, the flange is formed by bending a partial area of ​​the upper center washer.

[0014] In one embodiment, the upper magnetic circuit component further includes an upper washer, and the upper washer is arranged on a side of the upper magnetic steel away from the middle sticker.

[0015] In one embodiment, the number of the upper magnetic cover through holes is multiple, and the multiple upper magnetic cover through holes are arranged around the window.

[0016] In one embodiment, it also includes an upper centering support plate, which includes an upper inner fixing portion, an upper cantilever and an upper outer fixing portion which are sequentially connected from the inside to the outside, the upper diaphragm is connected to the upper voice coil via the upper inner fixing portion, and the upper annular magnetic conductive bracket is connected to the upper diaphragm via the upper outer fixing portion.

[0017] In one embodiment, it also includes a lower centering support plate, which includes a lower inner fixing portion, a lower cantilever and a lower outer fixing portion which are sequentially connected from the inside to the outside, the lower diaphragm is connected to the lower voice coil via the lower inner fixing portion, and the lower annular magnetic conductive bracket is connected to the lower diaphragm via the lower outer fixing portion.

[0018] In one embodiment, the upper magnetic conductive cover is provided with an upper avoidance groove for avoiding the upper diaphragm; and / or the lower magnetic conductive cover is provided with a lower avoidance groove for avoiding the lower diaphragm.

[0019] In one embodiment, the flanges are respectively provided at both ends and both sides of the upper magnetic steel.

[0020] The beneficial effects of the utility model are:

[0021] The micro speaker has a novel structure and uses two voice coils to drive the middle sticker to move, which effectively increases the driving force, so that the middle sticker can more strongly mobilize the air to produce sound, thereby increasing the sound pressure level of the micro speaker and improving the acoustic performance of the micro speaker.

[0022] The middle sticker is built into the micro speaker, and no vibration can be seen from the outside, effectively protecting the upper diaphragm, lower diaphragm and middle sticker from damage;

[0023] The upper voice coil and the lower voice coil are suspended by the upper diaphragm and the lower diaphragm respectively, which is conducive to better ensuring the stability of the vibration of the upper voice coil and the lower voice coil;

[0024] The upper center magnetic structure is hollowed out, and an additional vibration sound-generating structure is added, so that the micro speaker can form a high-bass speaker or a coaxial speaker, which is conducive to further improving the acoustic performance of the micro speaker;

[0025] The central magnetic hollow at the bottom integrates the camera assembly to form an integrated camera-speaker structure, which is conducive to the high integration of devices and can meet the development trend of increasingly compact internal space of electronic equipment. BRIEF DESCRIPTION OF THE DRAWINGS

[0026] 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.

[0027] Figure 1 is a cross-sectional view of the micro-speaker of the first embodiment of the utility model;

[0028] Figure 2 It is a schematic structural diagram of the upper magnetic conductive cover in the micro-speaker of the first embodiment of the utility model;

[0029] Figure 3 It is a structural schematic diagram of the upper center washer in the micro-speaker of the first embodiment of the utility model.

[0030] Description of Figure Numbers:

[0031] 11. Middle sticker; 12. Upper voice coil; 13. Lower voice coil; 14. Upper diaphragm; 15. Lower diaphragm;

[0032] 21. Upper magnetic shield; 211. Window; 212. Upper magnetic shield through hole; 213. Upper avoidance groove; 22. Upper annular magnetic steel; 23. Upper center washer; 231. Flanged edge; 232. Upper washer through hole; 24. Upper magnetic steel; 25. Upper diaphragm assembly; 26. Upper voice coil; 27. Upper washer;

[0033] 31. Lower magnetic shield; 311. Window; 312. Lower avoidance slot; 32. Lower annular magnetic steel; 33. Lower center washer;

[0034] 41. annular outer magnetic steel; 42. upper annular magnetic support; 43. lower annular magnetic support;

[0035] 51. Upper centering support piece; 52. Lower centering support piece;

[0036] 6. Camera assembly; 61. Lower contact portion. 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 3 , Embodiment 1 of the present utility model is: a miniature speaker that can be used in electronic devices such as mobile phones, hearing aids, tablet computers, smart watches, etc.

[0045] The micro speaker includes a vibration component, an upper magnetic circuit component, a lower magnetic circuit component, a camera component 6 and an external magnetic circuit component. The vibration component includes a middle sticker 11, an upper voice coil 12, a lower voice coil 13, an upper diaphragm 14 and a lower diaphragm 15. The upper diaphragm 14 and the lower diaphragm 15 are respectively annular. The upper voice coil 12 and the lower voice coil 13 are respectively connected to the middle sticker 11. The middle sticker 11 is located between the upper voice coil 12 and the lower voice coil 13. The upper voice coil 12 is connected to the upper diaphragm 14, and the lower voice coil 13 is connected to the lower diaphragm 15.

[0046] The upper magnetic circuit component includes an upper magnetic shield 21 and an upper center magnetic structure connected to each other. The upper center magnetic structure includes an upper annular magnetic steel 22 and an upper center washer 23 connected to each other. The upper annular magnetic steel 22 is connected to the upper magnetic shield 21. The upper center washer 23 has a flange 231 and an upper washer through hole 232. The flange 231 is located in the upper annular magnetic steel 22. An upper magnetic steel 24 is provided on the side of the upper center washer 23 away from the middle sticker 11. The upper magnetic steel 24 is located between at least one group of two relatively arranged flanges 231. Preferably, the flanges 231 are respectively provided at both ends and both sides of the upper magnetic steel 24. The upper magnetic shield 21 is connected to the upper diaphragm 14. The upper magnetic shield 21 is provided with a window 231. 11 and an upper magnetic cover through hole 212 connected to the upper washer through hole 232, an upper diaphragm assembly 25 is provided at the window 211, and the upper diaphragm assembly 25 is connected to an upper voice coil 26, and the upper voice coil 26 is arranged corresponding to the gap between the upper magnetic steel 24 and the flange 231; the flange 231 is formed by bending a partial area of ​​the upper center washer 23. In the actual processing and production process, it is preferred that the upper washer through hole 232 is a hole left by a partial area of ​​the upper center washer 23 due to the formation of the flange 231, so that the flange 231 and the upper washer through hole 232 can be formed at the same time after the partial area of ​​the upper center washer 23 is bent, which is conducive to facilitating the production of the micro speaker;

[0047] The lower magnetic circuit assembly includes a lower magnetic conductive cover 31 and a lower central magnetic structure connected to each other, the lower magnetic conductive cover 31 is connected to the lower diaphragm 15, the lower magnetic circuit assembly has an installation cavity, the lower magnetic conductive cover 31 has a window 311 connected to the installation cavity, and the middle sticker 11 is located between the upper central magnetic structure and the lower central magnetic structure;

[0048] The camera assembly 6 is installed in the installation cavity, and external light is received by the camera assembly 6 through the window 311. Preferably, the camera assembly 6 is not protruded from the bottom surface of the upper magnetic cover 21, whereby the lower magnetic cover 31 can protect the camera assembly 6 to a certain extent and reduce the chance of the camera assembly 6 being scratched; further preferably, a sealant contacting the camera assembly 6 is provided at the edge of the window 311, and the sealant is in the shape of a ring frame as a whole. The presence of the sealant can prevent external dust, water vapor, etc. from entering the installation cavity through the window 311, causing the camera assembly 6 to be contaminated and unable to work normally and stably.

[0049] The outer magnetic circuit assembly includes an annular outer magnetic steel 41, an upper annular magnetic conductive bracket 42 and a lower annular magnetic conductive bracket 43. The upper annular magnetic conductive bracket 42 connects the annular outer magnetic steel 41 and the upper diaphragm 14, and the lower annular magnetic conductive bracket 43 connects the annular outer magnetic steel 41 and the lower diaphragm 15. An upper magnetic gap for the upper voice coil 12 to move is formed between the upper center magnetic structure and the outer magnetic circuit assembly, and a lower magnetic gap for the lower voice coil 13 to move is formed between the lower center magnetic structure and the outer magnetic circuit assembly.

[0050] The lower center magnetic structure includes a connected lower annular magnetic steel 32 and a lower center washer 33, and the lower annular magnetic steel 32 is connected to the lower magnetic conductive cover 31. In order to improve the installation stability of the camera assembly 6 in the lower center magnetic structure, optionally, the top of the camera assembly 6 abuts against the lower center washer 33, and the lower part of the camera assembly 6 has a lower abutting portion 61 that abuts against the lower magnetic conductive cover 31, and the inner side of the edge of the window 311 abuts against the lower abutting portion 61.

[0051] In order to improve the acoustic performance of the tweeter, the upper magnetic circuit assembly further includes an upper washer 27 . The upper washer 27 is disposed on a side of the upper magnetic steel 24 away from the middle sticker 11 .

[0052] There are multiple upper magnetic cover through holes 212, and the multiple upper magnetic cover through holes 212 are arranged around the window 211. It is easy to understand that during the vibration of the middle sticker 11, the air inside the micro speaker and the outside air interact with each other through the upper magnetic cover through holes 212.

[0053] Specifically, the upper diaphragm 14 includes an upper inner mounting portion, an upper folding ring portion and an upper outer mounting portion which are sequentially connected from the inside to the outside, the upper inner mounting portion is connected to the upper voice coil 12, and the upper outer mounting portion is connected to the upper magnetic conductive cover 21 and the upper annular magnetic conductive bracket 42; the lower diaphragm 15 includes a lower inner mounting portion, a lower folding ring portion and a lower outer mounting portion which are sequentially connected from the inside to the outside, the lower inner mounting portion is connected to the lower voice coil 13, and the lower outer mounting portion is connected to the lower magnetic conductive cover 31 and the lower annular magnetic conductive bracket 43.

[0054] In this embodiment, the micro speaker further includes an upper centering support 51, and the upper centering support 51 includes an upper inner fixing portion, an upper cantilever, and an upper outer fixing portion connected in sequence from the inside to the outside, and the upper diaphragm 14 is connected to the upper voice coil 12 through the upper inner fixing portion, and the upper annular magnetic conductive support 42 is connected to the upper diaphragm 14 through the upper outer fixing portion. In detail, the upper inner fixing portion is connected to the upper inner mounting portion and the upper voice coil 12, respectively, and the upper outer fixing portion is connected to the upper annular magnetic conductive support 42 and the upper outer mounting portion, respectively. The existence of the upper centering support 51 can correct the upper voice coil 12 and improve the polarization and rolling vibration of the upper voice coil 12.

[0055] Similarly, the micro speaker also includes a lower centering support 52, which includes a lower inner fixing portion, a lower cantilever, and a lower outer fixing portion connected in sequence from the inside to the outside, the lower diaphragm 15 is connected to the lower voice coil 13 through the lower inner fixing portion, and the lower annular magnetic conductive support 43 is connected to the lower diaphragm 15 through the lower outer fixing portion. In detail, the lower inner fixing portion is connected to the lower inner mounting portion and the lower voice coil 13, respectively, and the lower outer fixing portion is connected to the lower annular magnetic conductive support 43 and the lower outer mounting portion, respectively. The existence of the lower centering support 52 can correct the lower voice coil 13 and improve the polarization and rolling vibration of the lower voice coil 13.

[0056] The upper magnetic conductive cover 21 is provided with an upper avoidance groove 213 for avoiding the upper diaphragm 14 ; and / or the lower magnetic conductive cover 31 is provided with a lower avoidance groove 312 for avoiding the lower diaphragm 15 .

[0057] 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 vibration component, the vibration component includes a middle sticker, an upper voice coil, a lower voice coil, an upper diaphragm and a lower diaphragm, the upper diaphragm and the lower diaphragm are respectively ring-shaped, the upper voice coil and the lower voice coil are respectively connected to the middle sticker, the middle sticker is located between the upper voice coil and the lower voice coil, the upper voice coil is connected to the upper diaphragm, and the lower voice coil is connected to the lower diaphragm; An upper magnetic circuit component, the upper magnetic circuit component includes an upper magnetic shield and an upper center magnetic structure connected to each other, the upper center magnetic structure includes an upper annular magnetic steel and an upper center washer connected to each other, the upper center washer has a flange and an upper washer through hole, the flange is located in the upper annular magnetic steel, the upper center washer is provided with an upper magnetic steel on a side away from the middle sticker, the upper magnetic steel is located between at least one group of two relatively arranged flanges, the upper magnetic shield is connected to the upper diaphragm, the upper magnetic shield is provided with a window and an upper magnetic shield through hole connected to the upper washer through hole, an upper diaphragm component is provided at the window, the upper diaphragm component is connected to an upper voice coil, and the upper voice coil is arranged corresponding to the gap between the upper magnetic steel and the flange; A lower magnetic circuit assembly, the lower magnetic circuit assembly comprising a lower magnetic conductive cover and a lower central magnetic structure connected to each other, the lower magnetic conductive cover being connected to the lower diaphragm, the lower magnetic circuit assembly having an installation cavity, the lower magnetic conductive cover having a window communicating with the installation cavity, and the middle sticker being located between the upper central magnetic structure and the lower central magnetic structure; A camera assembly, wherein the camera assembly is installed in the installation cavity; The external magnetic circuit component includes an annular external magnetic steel, an upper annular magnetic conductive bracket and a lower annular magnetic conductive bracket. The upper annular magnetic conductive bracket connects the annular external magnetic steel and the upper diaphragm, and the lower annular magnetic conductive bracket connects the annular external magnetic steel and the lower diaphragm.

2. The micro-speaker according to claim 1, characterized in that: The lower center magnetic structure includes a connected lower annular magnetic steel and a lower center washer, the top of the camera assembly abuts against the lower center washer, and the lower part of the camera assembly has a lower abutting portion that abuts against the lower magnetic conductive cover.

3. The micro-speaker according to claim 1, characterized in that: The camera assembly is arranged so as not to protrude from the bottom surface of the upper magnetic conductive cover.

4. The micro-speaker according to claim 1, characterized in that: The flange is formed by bending a partial area of ​​the upper center washer.

5. The micro-speaker according to claim 1, characterized in that: The upper magnetic circuit component also includes an upper washer, and the upper washer is arranged on a side of the upper magnetic steel away from the middle sticker.

6. The micro-speaker according to claim 1, characterized in that: The number of the upper magnetic cover through holes is multiple, and the multiple upper magnetic cover through holes are arranged around the window.

7. The micro-speaker according to claim 1, characterized in that: It also includes an upper centering support plate, which includes an upper inner fixing portion, an upper cantilever and an upper outer fixing portion which are sequentially connected from the inside to the outside, the upper diaphragm is connected to the upper voice coil via the upper inner fixing portion, and the upper annular magnetic conductive bracket is connected to the upper diaphragm via the upper outer fixing portion.

8. The micro-speaker according to claim 1, characterized in that: It also includes a lower centering support plate, which includes a lower inner fixing portion, a lower cantilever and a lower outer fixing portion which are sequentially connected from the inside to the outside, the lower diaphragm is connected to the lower voice coil via the lower inner fixing portion, and the lower annular magnetic conductive bracket is connected to the lower diaphragm via the lower outer fixing portion.

9. The micro-speaker according to claim 1, characterized in that: The upper magnetic conductive cover is provided with an upper avoidance groove for avoiding the upper diaphragm; and / or the lower magnetic conductive cover is provided with a lower avoidance groove for avoiding the lower diaphragm.

10. The micro-speaker according to claim 1, characterized in that: The flanges are respectively provided at both ends and both sides of the upper magnetic steel.

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