Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a box body, a vibrating diaphragm assembly, an elastic framework, a voice coil, a centering disk and two groups of magnetic steel assemblies, and the top and the bottom of the box body are respectively provided with a window; the top and the bottom of the box body are respectively provided with a vibrating diaphragm assembly, and the vibrating diaphragm assemblies seal the windows. The magnetic steel assemblies are arranged in the box body, the two magnetic steel assemblies are arranged close to the two ends of the box body respectively, each magnetic steel assembly comprises upper magnetic steel and lower magnetic steel with opposite magnetic pole directions, and a magnetic gap is formed between the upper magnetic steel and the lower magnetic steel; the elastic framework comprises an annular deformable body and mounting arms, the annular deformable body is connected with the two diaphragm assemblies, the two sides of the annular deformable body are connected with the mounting arms respectively, and the ends, away from the annular deformable body, of the mounting arms extend into the magnetic gaps; a voice coil is wound on each mounting arm; the centering disk comprises an inner fixing part, a cantilever part and an outer fixing part which are connected in sequence, the inner fixing part is connected with the mounting arm, and the outer fixing part is connected with the box body. The miniature loudspeaker is simple and novel in structure and excellent in performance.

Description

Technical Field

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

[0002] Micro speakers currently play an indispensable role as audio components in mobile devices such as mobile phones and tablets. As the world evolves, consumers are demanding increasingly higher sound quality and loudness, which in turn demands further improvements in the performance of micro speakers. To this end, dual-sided vibration-generating micro speakers have emerged on the market. However, existing dual-sided vibration-generating micro speakers suffer from numerous components and complex structures. Utility Model Content

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

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

[0005] A box body, wherein the top and bottom of the box body are respectively provided with windows;

[0006] A diaphragm assembly, the top and bottom of the box body are respectively provided with the diaphragm assembly, and the diaphragm assembly closes the window;

[0007] Two groups of magnetic steel assemblies, the magnetic steel assemblies being disposed within the box body, the two groups of magnetic steel assemblies being disposed adjacent to two ends of the box body, each group of magnetic steel assemblies comprising an upper magnetic steel and a lower magnetic steel having magnetic poles facing opposite directions, and a magnetic gap being formed between the upper magnetic steel and the lower magnetic steel;

[0008] an elastic skeleton, the elastic skeleton comprising an annular deformable body and a mounting arm, the annular deformable body connecting the two diaphragm assemblies, the mounting arms being connected to both sides of the annular deformable body, and the mounting arms extending into the magnetic gap at one end away from the annular deformable body;

[0009] a voice coil, each mounting arm being wound with the voice coil;

[0010] The centering support piece includes an inner fixing portion, a cantilever portion and an outer fixing portion which are connected in sequence, the inner fixing portion is connected to the mounting arm, and the outer fixing portion is connected to the box body.

[0011] In one embodiment, the mounting arms located on both sides of the annular deformation body are arranged in the same plane.

[0012] In one embodiment, the annular deformation body includes two arc-shaped arms arranged opposite to each other, the mounting arm is connected to the arc-shaped arms, the top ends of the two arc-shaped arms are connected by an upper flat plate portion, the upper flat plate portion is connected to the diaphragm assembly located at the top of the box body, and the bottom ends of the two arc-shaped arms are connected by a lower flat plate portion, and the lower flat plate portion is connected to the diaphragm assembly located at the bottom of the box body.

[0013] In one embodiment, the connection between the mounting arm and the arc-shaped arm is located in the middle of the arc-shaped arm.

[0014] In one embodiment, the elastic skeleton is an integral structure formed by integral processing.

[0015] In one embodiment, the elastic frame is made of metal or plastic.

[0016] In one embodiment, the window on the top of the box body and the window on the bottom of the box body are arranged opposite to each other.

[0017] In one embodiment, the centering arm is electrically connected to the voice coil.

[0018] In one embodiment, in the centering support piece, the cantilever parts are respectively connected to both sides of the inner fixing part, and the cantilever parts are located in the gap between the magnetic steel assembly and the box body.

[0019] In one embodiment, the top and bottom ends of the external fixing portion are both connected to the box body.

[0020] The beneficial effects of the present invention are as follows: the micro speaker has a simple and novel structure, is composed of few parts, is easy to produce and manufacture, has a large total volume of internal magnetic steel, and the entire area of the voice coil can be in the effective magnetic gap, so that the micro speaker has a very high BL value, thereby giving the micro speaker excellent performance and optimizing the listening experience. BRIEF DESCRIPTION OF THE DRAWINGS

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

[0022] Figure 1 is a cross-sectional view of the micro-speaker according to the first embodiment of the present invention;

[0023] Figure 2 This is a schematic structural diagram of a portion of the micro-speaker according to the first embodiment of the present invention.

[0024] Description of Figure Numbers:

[0025] 1. Box body;

[0026] 2. Diaphragm assembly;

[0027] 3. Elastic skeleton; 31. Annular deformation body; 311. Arc-shaped arm; 312. Upper flat plate; 313. Lower flat plate; 32. Mounting arm;

[0028] 4. Voice coil;

[0029] 5. Centering support; 51. Internal fixing portion; 52. Cantilever portion; 53. External fixing portion;

[0030] 6. Magnetic steel assembly; 61. Upper magnetic steel; 62. Lower magnetic steel. DETAILED DESCRIPTION

[0031] The purpose, features and advantages of the present invention will be further described with reference to the accompanying drawings and in conjunction with the embodiments.

[0032] The following will be combined with the drawings in the embodiments of the present invention to clearly and completely describe the technical solutions in the embodiments of the present invention. Obviously, the embodiments described are only part of the embodiments of the present invention, not all of the embodiments. Based on the embodiments of the present invention, all other embodiments obtained by ordinary technicians in this field without making creative efforts are within the scope of protection of the present invention.

[0033] 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 various components in a certain specific posture as shown in the accompanying drawings. If the specific posture changes, the directional indications will also change accordingly.

[0034] In addition, if the embodiments of the present invention include descriptions of "first," "second," etc., such descriptions are for descriptive purposes only and should not be construed as indicating or implying their relative importance or implicitly specifying the number of the technical features indicated. Therefore, features specified as "first" or "second" may explicitly or implicitly include at least one of such features.

[0035] In addition, if the word "and / or" appears throughout the text, it means that three parallel solutions are included. For example, "and / or" includes solutions, or solutions, or solutions that meet all of the requirements simultaneously. In addition, the technical solutions of various embodiments may be combined with each other, but this must be based on the fact that they can be implemented by ordinary technicians in this field. If the combination of technical solutions is mutually contradictory or cannot be implemented, it shall be deemed that such combination of technical solutions does not exist and is not within the scope of protection required by this utility model.

[0036] In this application, unless otherwise expressly specified or limited, terms such as "mounted," "connected," "connect," and "fixed" should be understood in a broad sense. For example, they may refer to fixed connections, detachable connections, or integration; mechanical connections or electrical connections; direct connections or indirect connections through an intermediate medium; and internal connections between two components or interactions between two components. Those skilled in the art will understand the specific meanings of these terms in this application based on specific circumstances.

[0037] Example 1

[0038] Please refer to Figure 1 and Figure 2 , Embodiment 1 of the present invention is: a micro speaker, comprising a box body 1, a diaphragm assembly 2, an elastic skeleton 3, a voice coil 4, a centering support plate 5 and two groups of magnetic steel assemblies 6, wherein the top and bottom of the box body 1 are respectively provided with windows, and preferably the window at the top of the box body 1 is arranged opposite to the window at the bottom of the box body 1; the top and bottom of the box body 1 are respectively provided with the diaphragm assembly 2, and the diaphragm assembly 2 closes the windows; the magnetic steel assembly 6 is arranged in the box body 1, and the two groups of the magnetic steel assemblies 6 are respectively arranged near the two ends of the box body 1, and each group of the magnetic steel assembly 6 includes an upper magnetic steel 61 and a lower magnetic steel 6 with opposite magnetic poles. 2, a magnetic gap is formed between the upper magnetic steel 61 and the lower magnetic steel 62; the elastic skeleton 3 includes an annular deformable body 31 and a mounting arm 32, the annular deformable body 31 connects the two diaphragm assemblies 2, and the mounting arms 32 are connected to both sides of the annular deformable body 31, and the ends of the mounting arms 32 away from the annular deformable body 31 extend into the magnetic gap; each mounting arm 32 is wound around the voice coil 4; the centering support 5 includes an inner fixing portion 51, a cantilever portion 52, and an outer fixing portion 53 connected in sequence, the inner fixing portion 51 is connected to the mounting arms 32, and the outer fixing portion 53 is connected to the box body 1.

[0039] When the micro speaker is working, the voice coil 4 drives the mounting arms 32 to move along the X-axis direction. The two mounting arms 32 move in opposite directions, causing the annular deformation body 31 to deform, thereby driving the diaphragm assembly 2 to move along the Z-axis direction, achieving the effect of vibration and sound generation.

[0040] In this embodiment, the magnetic poles of the upper magnetic steel 61 in the two groups of magnetic steel assemblies 6 are oriented in opposite directions. Specifically, in the same group of magnetic steel assemblies 6, when the end of the upper magnetic steel 61 near the lower magnetic steel 62 is the north pole, the end of the lower magnetic steel 62 near the upper magnetic steel 61 is the south pole. When the end of the upper magnetic steel 61 near the lower magnetic steel 62 is the south pole, the end of the lower magnetic steel 62 near the upper magnetic steel 61 is the north pole. In different groups of magnetic steel assemblies 6, when the end of one upper magnetic steel 61 near its corresponding magnetic gap is the north pole, the end of the other upper magnetic steel 61 near its corresponding magnetic gap is the south pole.

[0041] As a preferred embodiment, the centering support 5 is an FPC soft board, the centering support 5 is electrically connected to the voice coil 4, and an external power supply supplies power to the voice coil 4 through the centering support 5.

[0042] To ensure a more balanced force on the annular deformable body 31, the mounting arms 32 on either side of the annular deformable body 31 are coplanar. In this embodiment, the annular deformable body 31 includes two opposing arcuate arms 311. The mounting arms 32 connect the arcuate arms 311. The top ends of the two arcuate arms 311 are connected by an upper flat portion 312, which is connected to the diaphragm assembly 2 at the top of the box body 1. The bottom ends of the two arcuate arms 311 are connected by a lower flat portion 313, which is connected to the diaphragm assembly 2 at the bottom of the box body 1. Preferably, the connection between the mounting arms 32 and the arcuate arms 311 is located in the middle of the arcuate arms 311.

[0043] In order to facilitate the processing and manufacturing of the elastic skeleton 3 and control its manufacturing costs, the elastic skeleton 3 is an integrated structure that is processed and formed in one piece. The elastic skeleton 3 is easy to deform and has a relatively good elongation rate. The material of the elastic skeleton 3 can be either metal or plastic, and the specific selection can be made according to actual needs.

[0044] There are two centering supports 5, and the two centering supports 5 correspond one to one with the two mounting arms 32. As a preferred embodiment, in the centering support 5, the two sides of the inner fixing portion 51 are respectively connected to the cantilever portion 52, and the cantilever portion 52 is located in the gap between the magnetic steel assembly 6 and the box body 1.

[0045] The top and bottom ends of the outer fixing portion 53 are both connected to the box body 1. In this embodiment, the centering support piece 5 is substantially in an I-shape.

[0046] The above are merely optional embodiments of the present invention and do not limit the patent scope of the present invention. All equivalent structural transformations made using the contents of the present invention specification and drawings under the practical concept of the present invention, or direct / indirect application 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 box body, wherein the top and bottom of the box body are respectively provided with windows; A diaphragm assembly, the top and bottom of the box body are respectively provided with the diaphragm assembly, and the diaphragm assembly closes the window; Two groups of magnetic steel assemblies, the magnetic steel assemblies being disposed within the box body, the two groups of magnetic steel assemblies being disposed adjacent to two ends of the box body, each group of magnetic steel assemblies comprising an upper magnetic steel and a lower magnetic steel having magnetic poles facing opposite directions, and a magnetic gap being formed between the upper magnetic steel and the lower magnetic steel; an elastic skeleton, the elastic skeleton comprising an annular deformable body and a mounting arm, the annular deformable body connecting the two diaphragm assemblies, the mounting arms being connected to both sides of the annular deformable body, and the mounting arms extending into the magnetic gap at one end away from the annular deformable body; a voice coil, each mounting arm being wound with the voice coil; The centering support piece includes an inner fixing portion, a cantilever portion and an outer fixing portion which are connected in sequence, the inner fixing portion is connected to the mounting arm, and the outer fixing portion is connected to the box body.

2. The micro-speaker according to claim 1, wherein: The mounting arms located on both sides of the annular deformation body are arranged in the same plane.

3. The micro-speaker according to claim 1, wherein: The annular deformation body includes two arc-shaped arms arranged opposite to each other, the mounting arm is connected to the arc-shaped arms, the top ends of the two arc-shaped arms are connected by an upper flat plate portion, the upper flat plate portion is connected to the diaphragm assembly located at the top of the box body, and the bottom ends of the two arc-shaped arms are connected by a lower flat plate portion, and the lower flat plate portion is connected to the diaphragm assembly located at the bottom of the box body.

4. The micro-speaker according to claim 3, wherein: The connection point between the mounting arm and the arc-shaped arm is located in the middle of the arc-shaped arm.

5. The micro-speaker according to claim 1, wherein: The elastic skeleton is an integral structure formed by integral processing.

6. The micro-speaker according to claim 5, wherein: The elastic frame is made of metal or plastic.

7. The micro-speaker according to claim 1, wherein: The window on the top of the box body is arranged opposite to the window on the bottom of the box body.

8. The micro-speaker according to claim 1, wherein: The centering support is electrically connected to the voice coil.

9. The micro-speaker according to claim 1, wherein: In the centering support piece, the two sides of the inner fixing portion are respectively connected to the cantilever portion, and the cantilever portion is located in the gap between the magnetic steel assembly and the box body.

10. The micro-speaker according to claim 9, wherein: The top end and the bottom end of the external fixing portion are both connected to the box body.

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