Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a box body, a vibrating diaphragm assembly, a voice coil, a centering disk, two groups of magnetic steel assemblies and two groups of transmission assemblies, the top and the bottom of the box body are respectively provided with a window, and the vibrating diaphragm assembly seals 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; each transmission assembly comprises a mounting arm and a framework, one end of the framework is connected with the vibrating diaphragm assembly, the other end of the framework is provided with an inclined sliding groove, one end of the mounting arm is provided with a sliding block in sliding fit with the inclined sliding groove, the other end of the mounting arm extends into the magnetic gap, and the mounting arms in different groups of transmission assemblies extend into the magnetic gaps of different groups of magnetic steel assemblies; a voice coil is wound on each mounting arm; the centering disk is connected with the mounting arm and the box body. The miniature loudspeaker is simple and novel in structure, excellent in performance and good in user experience.

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] Two groups of transmission assemblies, each of the two groups of transmission assemblies being connected to the two diaphragm assemblies in a one-to-one correspondence, the transmission assemblies comprising a mounting arm and a frame, one end of the frame being connected to the diaphragm assembly, the other end of the frame being provided with an inclined slot, one end of the mounting arm being provided with a slider that slidably engages with the inclined slot, the other end of the mounting arm extending into the magnetic gap, the mounting arms of different groups of transmission assemblies extending into the magnetic gaps of different groups of magnetic steel assemblies;

[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 in the two sets of transmission assemblies are arranged in the same plane.

[0012] 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.

[0013] In one embodiment, the centering arm is electrically connected to the voice coil.

[0014] 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.

[0015] In one embodiment, the top and bottom ends of the external fixing portion are both connected to the box body.

[0016] In one embodiment, the skeleton is arranged along the Z-axis direction, the extension direction of the inclined slide groove is arranged at an acute angle to the Z-axis direction, and when the slider is viewed from the front, the slider is a parallelogram.

[0017] In one embodiment, a guide bracket is provided in the box body, and the guide bracket has a guide hole, and the guide hole cooperates with the frame to guide the frame to slide along the Z-axis direction.

[0018] In one embodiment, the inclined sliding groove is a through groove structure.

[0019] In one embodiment, the voice coils on different mounting arms are connected in parallel; or, the voice coils on different mounting arms are not energized at the same time.

[0020] The beneficial effects of this utility model are as follows: the micro-speaker has a simple and novel structure, is composed of a small number of components, and is easy to manufacture. The internal magnetic steel has a large total volume, and the entire area of the voice coil can be within the effective magnetic gap, resulting in a high BL value for the micro-speaker, which provides excellent performance and an optimized listening experience. The two diaphragm assemblies can operate either synchronously or asynchronously, enriching the control methods of the micro-speaker and enhancing the user 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. Transmission assembly; 31. Mounting arm; 311. Slider; 32. Frame; 321. Inclined chute;

[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, a voice coil 4, a centering support plate 5, two groups of magnetic steel assemblies 6 and two groups of transmission assemblies 3, the top and bottom of the box body 1 are respectively provided with windows, 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, each group of the magnetic steel assembly 6 includes an upper magnetic steel 61 and a lower magnetic steel 62 with opposite magnetic poles, and a magnetic gap is formed between the upper magnetic steel 61 and the lower magnetic steel 62; the two groups of the transmission assemblies 3 and the two diaphragms The components 2 are connected one by one. The transmission component 3 includes a mounting arm 31 and a skeleton 32. One end of the skeleton 32 is connected to the diaphragm component 2. The other end of the skeleton 32 is provided with an inclined groove 321. One end of the mounting arm 31 has a slider 311 that slidably cooperates with the inclined groove 321. The other end of the mounting arm 31 extends into the magnetic gap. The mounting arms 31 in different groups of the transmission components 3 extend into the magnetic gaps of different groups of the magnetic steel components 6. The voice coil 4 is respectively wound around each of the mounting arms 31. 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 arm 31, 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 arm 31 to move along the X-axis, thereby causing the skeleton 32 to slide along the Z-axis, and further drives the diaphragm assembly 2 to move along the Z-axis, achieving the effect of vibration and sound generation.

[0040] Specifically, the skeleton 32 is arranged along the Z-axis direction, the extending direction of the inclined sliding groove 321 is arranged at an acute angle to the Z-axis direction, and when looking directly at the slider 311 , the slider 311 is a parallelogram.

[0041] Optionally, a guide bracket (not shown in the figure) is provided in the box body 1, and the guide bracket has a guide hole. The guide hole cooperates with the skeleton 32 to guide the skeleton 32 to slide along the Z-axis direction. The guide hole can limit the freedom of the skeleton 32, ensuring that the skeleton 32 can only slide along the Z-axis direction without any deviation in other directions, which is beneficial to improving the working stability of the micro speaker.

[0042] In this embodiment, the inclined sliding groove 321 is a through groove structure. In other embodiments, the inclined sliding groove 321 can also be an open groove connected to the side of the skeleton 32.

[0043] It is easy to understand that the voice coils 4 on different mounting arms 31 are connected in parallel. At this time, the vibration directions of the two diaphragm assemblies 2 are opposite, which makes the micro-speaker have a louder loudness; or, the voice coils 4 on different mounting arms 31 are not energized at the same time. At this time, the two diaphragm assemblies 2 can work at different times, which is conducive to controlling the power consumption of the micro-speaker.

[0044] 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.

[0045] In order to optimize the layout of the internal space of the micro speaker, it is preferred that the mounting arms 31 in the two groups of transmission components 3 are arranged in the same plane.

[0046] 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.

[0047] There are two centering supports 5, and the two centering supports 5 correspond one to one to the two mounting arms 31. 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.

[0048] 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.

[0049] 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; Two groups of transmission assemblies, each of the two groups of transmission assemblies being connected to the two diaphragm assemblies in a one-to-one correspondence, the transmission assemblies comprising a mounting arm and a frame, one end of the frame being connected to the diaphragm assembly, the other end of the frame being provided with an inclined slot, one end of the mounting arm being provided with a slider that slidably engages with the inclined slot, the other end of the mounting arm extending into the magnetic gap, the mounting arms of different groups of transmission assemblies extending into the magnetic gaps of different groups of magnetic steel assemblies; 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 in the two groups of transmission assemblies are arranged in the same plane.

3. 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.

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

5. 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.

6. The micro-speaker according to claim 5, wherein: The top end and the bottom end of the external fixing portion are both connected to the box body.

7. The micro-speaker according to claim 1, wherein: The skeleton is arranged along the Z-axis direction, the extending direction of the inclined slide groove is arranged at an acute angle to the Z-axis direction, and when the slider is viewed from the front, the slider is in the shape of a parallelogram.

8. The micro-speaker according to claim 1, wherein: A guide bracket is provided in the box body, and the guide bracket has a guide hole. The guide hole cooperates with the frame to guide the frame to slide along the Z-axis direction.

9. The micro-speaker according to claim 1, wherein: The inclined sliding groove is a through groove structure.

10. The micro-speaker according to claim 1, wherein: The voice coils on different mounting arms are connected in parallel; or the voice coils on different mounting arms are not energized at the same time.

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