Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a frame, a magnetic circuit assembly and a vibration assembly, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the central magnetic structure comprises lower central magnetic steel, a central washer, upper central magnetic steel and an upper magnetic conductive cover which are sequentially stacked and connected from bottom to top, and the bottom of the lower central 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 central magnetic steel, the top end of the surrounding wall is connected with the edge of the body, the bottom end of the surrounding wall is bent and extends outwards to form the extending edge, the yoke is connected with the basin frame, the yoke is provided with a convex ring protruding upwards, and the convex ring surrounds the central magnetic structure and is arranged corresponding to the extending edge; the vibration assembly comprises a middle paste, a voice diaphragm and a voice coil, the voice diaphragm and the voice coil are respectively connected with the middle paste, the voice diaphragm is connected with the upper magnetic conductive cover and the basin stand, and the voice coil is arranged corresponding to a gap between the enclosure wall and the upper center magnetic steel and a gap between the convex ring and the lower center magnetic steel. The miniature loudspeaker is novel in structure, and large amplitude can be realized under an ultrathin framework.

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, people's requirements for micro electroacoustic devices used therein are also increasingly high. The amplitude of micro loudspeakers gradually increases from the original 0.2mm to 0.65mm. Moreover, micro loudspeakers are also becoming thinner and thinner. In particular, the conventional micro loudspeaker architecture cannot achieve large-amplitude design, which affects the consumer experience. SUMMARY

[0003] The utility model solves the technical problem for 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, which comprises:

[0005] A yoke;

[0006] A magnetic circuit assembly, which comprises a yoke and a center magnetic structure arranged on the yoke. The center magnetic structure comprises a lower center magnetic steel, a center dust shield, an upper center magnetic steel and an upper magnetic shield, which are sequentially stacked and connected from bottom to top. The bottom of the lower center magnetic steel is connected to the yoke. The upper magnetic shield comprises a body, a surrounding wall and an extension edge. The body is connected to the upper center magnetic steel. The top end of the surrounding wall is connected to the edge of the body. The bottom end of the surrounding wall is bent outward to form the extension edge. The yoke is connected to the yoke. The yoke has a convex ring protruding upward. The convex ring surrounds the center magnetic structure and is arranged corresponding to the extension edge.

[0007] A vibration assembly, which comprises a middle sticker and a diaphragm and a voice coil connected to the middle sticker respectively. The diaphragm is connected to the upper magnetic shield and the yoke. The voice coil is arranged corresponding to the gap between the surrounding wall and the upper center magnetic steel and the gap between the convex ring and the lower center magnetic steel.

[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, which are sequentially connected from inside to outside. The inner annular portion is connected to the extension edge. The outer annular portion is connected to the yoke. The middle sticker is connected to the connecting portion.

[0009] In an embodiment, the inner folded ring portion protrudes in a direction away from the yoke. The outer folded ring portion protrudes in a direction close to the yoke.

[0010] In an embodiment, the middle piece comprises a first ring portion, a raised portion and a second ring portion connected in sequence, the first ring portion is arranged higher than the second ring portion, the first ring portion is connected to the diaphragm, and the second ring portion is connected to the voice coil.

[0011] In an embodiment, the second ring portion is connected to a middle area of the voice coil, and the voice coil corresponds to the center hub.

[0012] In an embodiment, a centering support sheet is further included, the centering support sheet comprises an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence, the inner mounting portion is connected to the second ring portion, and the outer mounting portion is connected to the yoke.

[0013] In an embodiment, a top surface of the convex ring is provided with an avoiding groove for avoiding the centering support sheet.

[0014] In an embodiment, the inner mounting portion is connected to a corner portion, a long axis side or a short axis side of the voice coil.

[0015] In an embodiment, the convex ring is a stamping structure formed by stamping.

[0016] In an embodiment, magnetic poles of the upper center magnetic steel and the lower center magnetic steel are opposite to each other.

[0017] The micro speaker has the advantages that: the upper center magnetic steel and the lower center magnetic steel are opposite to each other in magnetic pole direction, and are matched with the upper magnetic cover, 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 hub, so that the displacement of the voice coil in the micro speaker is larger, the micro speaker can realize large amplitude under the ultra-thin structure, the development trend of the ultra-thin electronic equipment is met, and the use experience of consumers is improved. BRIEF DESCRIPTION OF DRAWINGS

[0018] In order to more clearly illustrate the technical scheme in the embodiments of the utility model 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 utility model, and for those skilled in the art, other drawings can be obtained according to the structure shown in the drawings without creative labor.

[0019] Fig. 1 It is a sectional view of the micro speaker of the utility model embodiment one;

[0020] Fig. 2Part structure of the micro loudspeaker of the embodiment one of the utility model is structural schematic diagram.

[0021] Fig. 3 The structure diagram of the yoke in the micro loudspeaker of the embodiment one of the utility model.

[0022] Explanation of reference numerals:

[0023] 1, stand;

[0024] 2, yoke; 21, convex ring; 211, avoiding groove;

[0025] 3, center magnetic structure; 31, lower center magnetic steel; 32, center Hua Si; 33, upper center magnetic steel; 34, upper magnetic shield; 341, main body; 342, enclosing wall; 343, extension edge;

[0026] 4, sound film; 41, inner annular part; 42, inner folded ring part; 43, connecting part; 44, outer folded ring part; 45, outer annular part;

[0027] 5, middle paste; 51, first ring part; 52, heightening part; 53, second ring part;

[0028] 6, voice coil;

[0029] 7, centering support sheet; 71, inner mounting part; 72, cantilever part; 73, outer mounting part. DETAILED DESCRIPTION

[0030] The utility model aims to realize, function characteristics and advantages will be combined with embodiment, reference to the drawing further explanation.

[0031] The technical scheme in the embodiment of the utility model will be described clearly and completely in the embodiment of the utility model below, obviously, the described embodiment is only a part of the embodiment of the utility model, not all the embodiment. Based on the embodiment in the utility model, all other embodiments obtained by the ordinary skill in the art without making creative labor belong to the scope of the utility model protection.

[0032] It needs to be explained that if the embodiment of the utility model has involved directionality indication such as up, down, left, right, front, back, the directionality indication is only used to explain the relative position relationship, movement condition etc. between the components in a certain specific posture such as shown in the drawing, if the specific posture changes, then the directionality indication also changes accordingly.

[0033] In addition, if the description of "first", "second" and the like is involved in the embodiments of the present application, the description of "first", "second" and the like is only for the purpose of description, and cannot be understood as indicating or implying the relative importance of the indicated technical features or implicitly indicating the number of the indicated technical features. Therefore, the features limited by "first", "second" can explicitly or implicitly include at least one of the features.

[0034] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel schemes. Taking "and / or" as an example, it includes scheme, or scheme, or and simultaneously satisfied scheme. In addition, the technical solutions of each embodiment can be combined with each other, but it must be based on the realization of the ordinary skilled in the art, when the combination of technical solutions appears contradictory or cannot be realized, it should be considered that the combination of technical solutions does not exist, also not within the protection scope required by the present application.

[0035] In the present application, unless otherwise expressly specified and limited, the terms "mounting", "connection", "connection", "fixing" and the like should be understood in a broad sense, for example, it can be fixedly connected, or it can be detachably connected, or it can be integrated; it can be mechanical connection, or electrical connection; it can be directly connected, or indirectly connected through intermediate medium; it can be the communication between two elements or the interaction relationship between two elements. For the ordinary skilled in the art, the specific meaning of the above terms in the present application can be understood according to the specific circumstances.

[0036] Embodiment one

[0037] Please refer to Figs. 1 to 3The utility model discloses an embodiment one for: a micro loudspeaker, including basin frame 1, magnetic circuit assembly and vibration assembly, the magnetic circuit assembly includes yoke 2 and sets up the center magnetic structure 3 on yoke 2, the center magnetic structure 3 includes by lower to upper sequentially stack and be connected with lower center magnetic steel 31, center Hu Si 32, upper center magnetic steel 33 and upper magnetic cover 34, the bottom of lower center magnetic steel 31 is connected yoke 2, upper center magnetic steel 33 with lower center magnetic steel 31 magnetic pole is opposite, upper magnetic cover 34 includes body 341, enclosing wall 342 and extension edge 343, the body 341 is connected upper center magnetic steel 33, the top end of enclosing wall 342 is connected the brim of body 341, the bottom end of enclosing wall 342 is outwardly bent and extends and forms extension edge 343, yoke 2 is connected basin frame 1, yoke 2 has the convex ring 21 that protrudes upwards, the convex ring 21 surrounds center magnetic structure 3 and is correspondingly set with extension edge 343, the vibration assembly includes middle paste 5 and respectively connects the sound film 4 and voice coil 6 of middle paste 5, the sound film 4 is connected upper magnetic cover 34 and basin frame 1, and voice coil 6 is correspondingly set with the gap between enclosing wall 342 and upper center magnetic steel 33 and the gap between convex ring 21 and lower center magnetic steel 31.

[0038] The sound film 4 includes sequentially connected inner annular part 41, inner folding ring part 42, connecting part 43, outer folding ring part 44 and outer annular part 45 from inside to outside, the inner annular part 41 is connected with the extension edge 343, the outer annular part 45 is connected with the basin frame 1, and the connecting part 43 is connected with the middle paste 5.

[0039] Preferably, the inner annular part 41 is connected with the extension edge 343, so that the extension edge 343 not only plays a role in lateral magnetic conduction, but also provides a mounting position for the inner edge of the inner annular part 41, and enables the inner annular part 41 to occupy no thickness space of the micro loudspeaker, ensuring the ultra-thin micro loudspeaker. In other embodiments, the inner annular part 41 can also be connected with the enclosing wall 342 and / or the body 341.

[0040] In this embodiment, the inner folding ring part 42 protrudes away from the yoke 2, and the outer folding ring part 44 protrudes towards the yoke 2. Specifically, the outer folding ring part 44 is correspondingly arranged on the outer side of the convex ring 21, so as to avoid collision between the outer folding ring part 44 and the convex ring 21 during the operation of the micro loudspeaker, and the outer folding ring part 44 and the convex ring 21 are misaligned, so as to keep the micro loudspeaker ultra-thin.

[0041] In the embodiment, the middle piece 5 comprises a first ring part 51, a raised part 52 and a second ring part 53 connected in sequence, the first ring part 51 is arranged higher than the second ring part 53, and both are located at different sides of the raised part 52, the first ring part 51 is connected with the sound film 4, and the second ring part 53 is connected with the middle part of the voice coil 6, specifically, the first ring part 51 is connected with the connecting part 43, and the second ring part 53 is connected with the middle part of the voice coil 6, and the voice coil 6 is arranged corresponding to the center spider 32. In other embodiments, the middle piece 5 can also be other styles, but the middle piece 5 constructed in this embodiment has a larger contact area with the voice coil 6, so that the structural stability of the micro speaker can be effectively improved.

[0042] The micro speaker further comprises a centering bracket 7, the centering bracket 7 comprises an inner mounting part 71, a cantilever part 72 and an outer mounting part 73 connected in sequence, the inner mounting part 71 is connected with the second ring part 53, and the outer mounting part 73 is connected with the yoke 1.

[0043] The inner mounting part 71 is connected with the corner part, the long axis side or the short axis side of the voice coil 6, in order to avoid collision between the convex ring 21 and the centering bracket 7, the top surface of the convex ring 21 is provided with an avoiding groove 211 for avoiding the centering bracket 7.

[0044] In the embodiment, the convex ring 21 is a stamping structure formed by stamping, the stamping convex ring 21 is convenient for processing and forming, and meanwhile can reduce manufacturing materials of the yoke 2.

[0045] The above is only an optional embodiment of the utility model, and does not limit the patent range of the utility model, and any equivalent structural transformation made by using the utility model specification and the drawings contents, or directly / indirectly applied in other related technical fields under the inventive concept of the utility model is included in the patent protection range of the utility model.

Claims

1. A miniature loudspeaker, characterized in that: include Sink stand; A magnetic circuit assembly includes a yoke and a central magnetic structure disposed on the yoke. The central magnetic structure includes a lower central magnet, a central washer, an upper central magnet, and an upper magnetic shield stacked and connected sequentially from bottom to top. The bottom of the lower central magnet is connected to the yoke. The upper magnetic shield includes a body, a surrounding wall, and an extension edge. The body is connected to the upper central magnet. The top of the surrounding wall is connected to the edge of the body. The bottom of the surrounding wall bends outward to form the extension edge. The yoke is connected to the basin stand. The yoke has an upwardly protruding ring that surrounds the central magnetic structure and is disposed corresponding to the extension edge. A vibration assembly includes a center patch and a diaphragm and a voice coil respectively connected to the center patch. The diaphragm is connected to the upper magnetic cover and the frame. The voice coil is configured to correspond to the gap between the enclosure and the upper central magnet and the gap between the convex ring and the lower central magnet.

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 extended edge, the outer annular portion is connected to the frame, and the center patch is connected to the connecting portion.

3. 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.

4. The miniature loudspeaker according to claim 1, characterized in that: The middle part includes a first ring, a raised part and a second ring connected in sequence. The first ring is set higher than the second ring. The first ring is connected to the diaphragm and the second ring is connected to the voice coil.

5. The miniature loudspeaker according to claim 4, characterized in that: The second ring portion connects to the middle region of the voice coil, which is positioned corresponding to the center washer.

6. The miniature loudspeaker according to claim 4, 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 ring part, and the outer mounting part is connected to the basin frame.

7. The miniature loudspeaker according to claim 6, characterized in that: The top surface of the convex ring is provided with a clearance groove for avoiding the centering support plate.

8. The miniature loudspeaker according to claim 6, characterized in that: The inner mounting portion connects to the corner, long axis side, or short axis side of the voice coil.

9. The miniature loudspeaker according to claim 1, characterized in that: The convex ring is a stamped structure formed by stamping.

10. The miniature loudspeaker according to claim 1, characterized in that: The upper central magnet and the lower central magnet have opposite magnetic pole orientations.

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