Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a basin stand, a magnetic circuit assembly and a vibration assembly, the magnetic circuit assembly comprises a yoke, and a central magnetic structure and a side magnetic structure which are respectively arranged on the yoke, the yoke is connected with the basin stand, the central magnetic structure comprises a lower central magnetic steel, a central washer, an upper central magnetic steel and an upper magnetic conductive cover which are sequentially stacked and connected from bottom to top, the bottom of the lower center magnetic steel is connected with the yoke, the upper magnetic conductive cover comprises a body, a surrounding wall and an extending edge, the body is connected with the upper center magnetic steel, the top end of the surrounding wall is connected with the edge of the body, and the bottom end of the surrounding wall is bent outwards and extends to form the extending edge; the vibration assembly comprises a middle paste, and a voice diaphragm and a voice coil which are respectively connected with the middle paste. The voice diaphragm is connected with the upper magnetic conductive cover and the basin stand. The miniature loudspeaker is novel in structure and excellent in performance, can realize large amplitude under an ultrathin structure, accords with the development trend of ultrathin electronic equipment, and is beneficial to improving the use experience of consumers.

Description

TECHNICAL FIELD

[0001] The utility model relates to the technical field of electroacoustic transducer, especially relates to a micro loudspeaker. BACKGROUND

[0002] Micro loudspeakers are widely used in portable electronic devices such as mobile phones, notebook computers, hearing aids, etc. With the rapid development of these portable electronic devices, the requirements for micro electroacoustic devices used therein are also increasingly high. The amplitude of micro loudspeakers has gradually increased from 0.2mm to 0.65mm. Moreover, micro loudspeakers are also becoming thinner and thinner. In particular, the adoption of ultra-thin architecture by folding mobile phones makes it impossible to achieve large-amplitude design with conventional micro loudspeaker architecture, which affects the consumer experience. SUMMARY

[0003] The utility model solves the technical problem of providing a large-amplitude ultra-thin micro loudspeaker.

[0004] To solve the above technical problems, the utility model adopts the technical scheme of a micro loudspeaker, comprising:

[0005] A yoke;

[0006] A magnetic circuit assembly, comprising a yoke, a center magnetic structure and a side magnetic structure arranged on the yoke respectively, the yoke being connected to the yoke, the center magnetic structure comprising a lower center magnetic steel, a center dust shield, an upper center magnetic steel and an upper magnetic shield stacked and connected in order from bottom to top, the bottom of the lower center magnetic steel being connected to the yoke, the upper magnetic shield comprising a body, a surrounding wall and an extension side, the body being connected to the upper center magnetic steel, the top end of the surrounding wall being connected to the edge of the body, and the bottom end of the surrounding wall being bent outward to form the extension side;

[0007] A vibration assembly, comprising a middle pad and a diaphragm and a voice coil connected to the middle pad respectively, the diaphragm being connected to the upper magnetic shield and the yoke.

[0008] In an embodiment, the diaphragm comprises an inner annular portion, an inner folded ring portion, a connecting portion, an outer folded ring portion and an outer annular portion connected in order from inside to outside, the inner annular portion being connected to the upper magnetic shield, the outer annular portion being connected to the yoke, and the middle pad being connected to the connecting portion.

[0009] In an embodiment, the inner annular portion is connected to the extension side.

[0010] In an embodiment, the inner folded ring portion protrudes in a direction away from the yoke, and the outer folded ring portion protrudes in a direction close to the yoke.

[0011] In an embodiment, the extension side is connected to the side magnetic structure.

[0012] In an embodiment, the middle piece comprises a first horizontal part, a vertical part and a second horizontal part connected in sequence, the first horizontal part is arranged higher than the second horizontal part, the first horizontal part is connected with the diaphragm, and the second horizontal part is connected with the voice coil.

[0013] In an embodiment, the bottom surface of the voice coil is connected with the second horizontal part.

[0014] In an embodiment, the second horizontal part is provided with a lower groove away from one end of the vertical part, the inner bottom surface of the lower groove is connected with the bottom surface of the voice coil, and the wall surface of the lower groove is connected with the wall surface of the voice coil.

[0015] In an embodiment, the first horizontal part is in the shape of a ring frame as a whole.

[0016] In an embodiment, a centering support sheet is further included, the centering support sheet comprises an inner mounting part, a cantilever part and an outer mounting part connected in sequence, the inner mounting part is connected with the second horizontal part, and the outer mounting part is connected with the yoke.

[0017] The micro speaker has the advantages that: the micro speaker has a novel structure, the magnetic poles of the upper center magnetic steel and the lower center magnetic steel are opposite, and the upper magnetic cover is matched, so that the magnetic efficiency is effectively improved, the BL value of the micro speaker is improved, the performance of the micro speaker is improved, the voice coil can be arranged corresponding to the center dust cap, so that the displacement of the voice coil in the micro speaker can be larger, so that the micro speaker can realize large amplitude under the ultra-thin structure, meets the development trend of ultra-thin electronic equipment, and is beneficial to improving the use experience of consumers. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the present application or the prior art, the drawings needed to be used in the embodiment or the prior art description will be briefly introduced below, and obviously, the drawings in the following description are only some embodiments of the present application, and other drawings can be obtained according to the structures shown in the drawings without creative labor for those skilled in the art.

[0019] Figure 1 It is a sectional view of the micro speaker of the embodiment one of the present application.

[0020] Figure 2 It is a structural schematic view of part of the structure of the micro speaker of the embodiment one of the present application.

[0021] EXPLANATION OF DRAWINGS:

[0022] 1, yoke;

[0023] 2, yoke;

[0024] 3, center magnetic structure; 31, lower center magnetic steel; 32, center dust core; 33, upper center magnetic steel; 34, upper magnetic shield; 341, body; 342, surrounding wall; 343, extension edge;

[0025] 4, side magnetic structure;

[0026] 5, diaphragm; 51, inner annular part; 52, inner folded ring part; 53, connecting part; 54, outer folded ring part; 55, outer annular part;

[0027] 6, middle sticker; 61, first horizontal part; 62, vertical part; 63, second horizontal part; 631, lower groove;

[0028] 7, voice coil;

[0029] 8, centering branch; 81, inner mounting part; 82, cantilever part; 83, outer mounting part. DETAILED DESCRIPTION

[0030] The utility model discloses purposes, functional characteristics and advantages will combine embodiment, with reference to the further description of the drawings.

[0031] The technical solutions in the embodiments of the utility model will be clearly and completely described below with reference to the drawings in the embodiments of the utility model. Obviously, the described embodiments are only part of the embodiments of the utility model, not all the embodiments. Based on the embodiments in the utility model, all other embodiments obtained by those skilled in the art without creative labor belong to the protection scope of the utility model.

[0032] It should be noted that if the embodiments of the utility model involve directional indications such as up, down, left, right, front, back, etc., the directional indications are only used to explain the relative position relationship, movement condition, etc. between the components in a certain specific posture, such as shown in the drawings. If the specific posture changes, the directional indications also change accordingly.

[0033] In addition, if the embodiments of the utility model involve descriptions such as "first", "second", etc., the descriptions of "first", "second", etc. are only for description purposes, and cannot be understood as indicating or implying the relative importance or implicitly indicating the number of the indicated technical features. Therefore, the features with "first" and "second" can explicitly or implicitly include at least one of the features.

[0034] Furthermore, if the meaning of "and / or" appears throughout the text, it refers to three parallel solutions. For example, "and / or" includes solution 1, solution 2, and solution 3, which simultaneously satisfy the above conditions. Additionally, the technical solutions of the various embodiments can be combined with each other, but this must be based on the ability of those skilled in the art to implement them. When the combination of technical solutions is contradictory or impossible to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection claimed by this utility model.

[0035] In this application, unless otherwise expressly specified and limited, the terms "installation," "connection," "linking," and "fixing," etc., should be interpreted broadly. For example, they can refer to a fixed connection, a detachable connection, or an integral part; they can refer to a mechanical connection or an electrical connection; they can refer to a direct connection or an indirect connection through an intermediate medium; they can refer to the internal communication of two components or the interaction between two components. Those skilled in the art can understand the specific meaning of the above terms in this application according to the specific circumstances.

[0036] Example 1

[0037] Please refer to Figure 1 and Figure 2 The first embodiment of this utility model is as follows: a miniature loudspeaker includes a frame 1, a magnetic circuit assembly, and a vibration assembly. The magnetic circuit assembly includes a yoke 2 and a central magnetic structure 3 and a side magnetic structure 4 respectively disposed on the yoke 2. The yoke 2 is connected to the frame 1. The central magnetic structure 3 includes a lower central magnet 31, a central washer 32, an upper central magnet 33, and an upper magnetic shield 34 stacked and connected from bottom to top. The bottom of the lower central magnet 31 is connected to the yoke 2. The upper magnetic shield 34 includes a body 341, a wall 342, and an extension edge 343. The body 341 is connected to the upper central magnet 33. The top of the wall 342 is connected to the edge of the body 341. The bottom of the wall 342 bends outward to form the extension edge 343. The vibration assembly includes a center patch 6 and a diaphragm 5 and a voice coil 7 respectively connected to the center patch 6. The diaphragm 5 is connected to the upper magnetic shield 34 and the frame 1.

[0038] The diaphragm 5 includes an inner annular portion 51, an inner folded ring portion 52, a connecting portion 53, an outer folded ring portion 54, and an outer annular portion 55 connected sequentially from the inside to the outside. The inner annular portion 51 is connected to the upper magnetic cover 34, the outer annular portion 55 is connected to the frame 1, and the middle patch 6 is connected to the connecting portion 53.

[0039] Preferably, the inner annular part 51 is connected to the extension edge 343, so that the extension edge 343 not only plays a role of lateral magnetic conduction, but also provides a mounting position for the inner edge of the inner annular part 51, and enables the inner annular part 51 to occupy no thickness space of the micro speaker, thereby ensuring the ultra-thin micro speaker. In other embodiments, the inner annular part 51 can also be connected to the surrounding wall 342 and / or the body 341.

[0040] In the embodiment, the inner folding ring part 52 protrudes away from the yoke 2, and the outer folding ring part 54 protrudes towards the yoke 2. Preferably, the outer folding ring part 54 is arranged corresponding to the outer side region of the side magnetic structure 4, so as to avoid collision between the outer folding ring part 54 and the side magnetic structure 4 during the operation of the micro speaker, and meanwhile, the misalignment between the outer folding ring part 54 and the side magnetic structure 4 can enable the micro speaker to remain ultra-thin.

[0041] As a preferred embodiment, the extension edge 343 is connected to the side magnetic structure 4, so as to not only improve the structural stability of the overall structure of the micro speaker, but also enable the upper magnetic conduction cover 34 to play a better magnetic conduction effect. Specifically, in the embodiment, the bottom surface of the extension edge 343 is connected to the top surface of the side magnetic structure 4, and the top surface of the extension edge 343 is connected to the inner annular part 51.

[0042] The middle piece 6 comprises a first horizontal part 61, a vertical part 62 and a second horizontal part 63 connected in sequence. The first horizontal part 61 is arranged higher than the second horizontal part 63 and located at the opposite side of the vertical part 62. The first horizontal part 61 is connected to the sound film 5, and the second horizontal part 63 is connected to the voice coil 7. Specifically, the bottom surface of the voice coil 7 is connected to the second horizontal part 63, and the middle region of the voice coil 7 corresponds to the center dust cap 32.

[0043] In order to improve the stability of the connection between the voice coil 7 and the middle piece 6, the second horizontal part 63 is provided with a lower groove 631 at the end away from the vertical part 62. The inner bottom surface of the lower groove 631 is connected to the bottom surface of the voice coil 7, and the wall surface of the lower groove 631 is connected to the wall surface of the voice coil 7.

[0044] Preferably, the first horizontal part 61 is in the shape of a ring frame as a whole, and the first horizontal part 61 can improve the rigidity of the sound film 5, thereby improving the collapse phenomenon of the sound film 5.

[0045] The micro speaker further comprises a centering support sheet 8. The centering support sheet 8 comprises an inner mounting part 81, a cantilever part 82 and an outer mounting part 83 connected in sequence. The inner mounting part 81 is connected to the second horizontal part 63, and the outer mounting part 83 is connected to the basket 1.

[0046] Specifically, the number of the edge magnetic structures 4 is multiple, the multiple edge magnetic structures 4 are arranged around the center magnetic structure 3, the magnetic gap is formed between the center magnetic structure 3 and the edge magnetic structure 4, two adjacent edge magnetic structures 4 form a mouth part which communicates the outside of the edge magnetic structure 4 and the magnetic gap, and the part of the middle adhesive 6 and the part of the centering supporting sheet 8 are located in the mouth part.

[0047] The above is only optional embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent structural transformation made by the present application specification and drawings, or direct / indirect application in other related technical fields is included in the patent protection scope of the present application.

Claims

1. A miniature loudspeaker, characterized in that: include Sink stand; A magnetic circuit assembly includes a yoke and a central magnetic structure and a side magnetic structure respectively disposed on the yoke. The yoke is connected to the basket frame. The central magnetic structure includes a lower central magnet, a central washer, an upper central magnet, and an upper magnetic shield stacked and connected from bottom to top. The bottom of the lower central magnet is connected to the yoke. The upper magnetic shield includes a body, a wall, and an extension edge. The body is connected to the upper central magnet. The top of the wall is connected to the edge of the body. The bottom of the wall bends outward to form the extension edge. A vibration assembly, comprising a center plate and a diaphragm and a voice coil respectively connected to the center plate, wherein the diaphragm is connected to the upper magnetic cover and the frame.

2. The miniature loudspeaker according to claim 1, characterized in that: The diaphragm includes an inner annular portion, an inner folded ring portion, a connecting portion, an outer folded ring portion, and an outer annular portion connected sequentially from the inside to the outside. The inner annular portion is connected to the upper magnetic cover, the outer annular portion is connected to the frame, and the middle part is connected to the connecting portion.

3. The miniature loudspeaker according to claim 2, characterized in that: The inner annular portion connects to the extended edge.

4. The miniature loudspeaker according to claim 2, characterized in that: The inner folded ring portion protrudes away from the yoke, and the outer folded ring portion protrudes towards the yoke.

5. The miniature loudspeaker according to claim 1, characterized in that: The extended edge connects to the edge magnetic structure.

6. The miniature loudspeaker according to claim 1, characterized in that: The middle part includes a first horizontal part, a vertical part, and a second horizontal part connected in sequence. The first horizontal part is positioned higher than the second horizontal part. The first horizontal part is connected to the diaphragm, and the second horizontal part is connected to the voice coil.

7. The miniature loudspeaker according to claim 6, characterized in that: The bottom surface of the voice coil is connected to the second horizontal section.

8. The miniature loudspeaker according to claim 7, characterized in that: The second horizontal portion has a lower groove at one end away from the vertical portion. The inner bottom surface of the lower groove is connected to the bottom surface of the voice coil, and the wall surface of the lower groove is connected to the wall surface of the voice coil.

9. The miniature loudspeaker according to claim 6, characterized in that: The first horizontal section is in the shape of a ring frame.

10. The miniature loudspeaker according to claim 6, characterized in that: It also includes a centering support, which comprises an inner mounting part, a cantilever part, and an outer mounting part connected in sequence. The inner mounting part is connected to the second horizontal part, and the outer mounting part is connected to the basin frame.

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