Miniature loudspeaker

Abstract

The utility model discloses a miniature loudspeaker, which comprises a frame, a first vibration assembly, a magnetic circuit assembly and a plurality of second vibration assemblies, and is characterized in that the first vibration assembly is arranged on one side of the frame and comprises a first diaphragm assembly and a plurality of first voice coils connected to the first diaphragm assembly; the magnetic circuit assembly is arranged on the other side of the basin frame and comprises a yoke and a plurality of central magnetic structures arranged corresponding to the hollow area of the first voice coil, the yoke is provided with a window, the central magnetic structures correspond to the window, each central magnetic structure comprises a magnetic steel structure, an upper washer and a magnetic conductive plate, and the magnetic conductive plates are located at the windows; the magnetic steel structure comprises a central main magnetic steel and a central auxiliary magnetic steel, a linear gap is formed between the central main magnetic steel and the central auxiliary magnetic steel, the central main magnetic steel is connected with the magnetic conductive plate and the upper washer, the upper washer is located above the central main magnetic steel, and the central auxiliary magnetic steel is connected with the upper washer, the yoke and the magnetic conductive plate. The miniature loudspeaker is excellent in high-pitch effect and low-pitch effect.

Description

Technical Field

[0001] The utility model relates to the technical field of electroacoustic transducers, and particularly relates to a micro speaker. Background Art

[0002] Micro speakers are widely used in portable electronic devices such as mobile phones, laptop computers, hearing aids, etc. With the rapid development of these portable electronic devices, people's requirements for the micro electroacoustic devices applied therein are also getting higher and higher.

[0003] Micro speakers usually adopt high and low frequency division to improve the sound effect. The Chinese utility model patent with the publication number of CN217721457U discloses a coaxial speaker, which includes a high-frequency unit and a low-frequency unit. In the actual use process, it is found that there is still room for further improvement in its high-frequency effect and low-frequency effect. Summary of the Utility Model

[0004] The main purpose of the utility model is to propose a micro speaker with a new structure, aiming to solve the problem of poor high and low sound effects of the existing micro speakers.

[0005] To solve the above technical problems, the technical solution adopted by the utility model is: a micro speaker, comprising:

[0006] A chassis;

[0007] A first vibration assembly, the first vibration assembly is arranged on one side of the chassis, and the first vibration assembly includes a first diaphragm assembly and a plurality of first voice coils connected to the first diaphragm assembly;

[0008] A magnetic circuit assembly, the magnetic circuit assembly is arranged on the other side of the chassis, the magnetic circuit assembly includes a yoke and a plurality of central magnetic structures arranged corresponding to the hollow area of the first voice coil, the yoke is provided with a window, the central magnetic structure corresponds to the window, the central magnetic structure includes a magnetic steel structure, an upper washer and a magnetic conductive plate, the magnetic conductive plate is located at the window, the magnetic steel structure includes a central main magnetic steel and a central sub-magnetic steel, a linear gap is formed between the central main magnetic steel and the central sub-magnetic steel, the central main magnetic steel connects the magnetic conductive plate and the upper washer, the upper washer is located above the central main magnetic steel, the central sub-magnetic steel connects the upper washer, the yoke and the magnetic conductive plate, the magnetic conductive plate has a first gap corresponding to the linear gap, the upper washer has a second gap corresponding to the linear gap, and the linear gap respectively communicates with the first gap and the second gap to form a vertical magnetic gap;

[0009] A plurality of second vibration components, wherein the second vibration components include a second diaphragm component and two vertical voice coils connected to the second diaphragm component, the vertical voice coils extend into the vertical magnetic gap, and the second diaphragm component is connected to the magnetic conductive plate.

[0010] In one embodiment, the edge of the magnetic conductive plate has a flange bent in a direction away from the first vibration component, and the outer edge of the second vibration membrane component is connected to the flange.

[0011] In one embodiment, at least a portion of an upper side of the vertical voice coil is located in the second gap, and at least a portion of a lower side of the vertical voice coil is located in the first gap.

[0012] In one embodiment, two adjacent first voice coils are in contact with each other.

[0013] In one embodiment, two adjacent first voice coils are bonded and fixed.

[0014] In one embodiment, the magnetic circuit assembly further includes a side magnetic structure, which connects the basin frame and the yoke, and a partial area of the first magnetic gap for the first voice coil to move is formed between the central magnetic structure and the side magnetic structure.

[0015] In one embodiment, the two vertical voice coils in the second vibration assembly are arranged opposite to each other.

[0016] In one embodiment, the number of the first voice coils is two.

[0017] The beneficial effects of the present invention are: the micro-speaker has a novel structure, has multiple tweeters and multiple woofers, and the multiple woofers share the first diaphragm assembly, which effectively improves the sensitivity, treble effect and bass effect of the micro-speaker, is beneficial to improving the acoustic performance of the micro-speaker, and enhances the user's experience. Moreover, the tweeter is arranged in the internal space corresponding to the voice coil of the woofer, which makes full use of the internal space of the micro-speaker, making the micro-speaker structure more compact and smaller in size, and can be well adapted to lightweight electronic devices. In addition, the vertical magnetic gap occupies a small space, so that the total volume of the central magnetic structure can be designed to be larger, thereby achieving better performance while allowing the micro-speaker to maintain a small size. BRIEF DESCRIPTION OF THE DRAWINGS

[0018] To more clearly illustrate the technical solutions in the embodiments of the present invention or the prior art, the following will briefly introduce the drawings required for the description of the embodiments or the prior art. Obviously, the drawings in the following description are only some embodiments of the present invention. For those of ordinary skill in the art, without creative efforts, other drawings can also be obtained based on the structures shown in these drawings.

[0019] Figure 1 A cross-sectional view of the micro speaker according to the first embodiment of the present invention;

[0020] Figure 2 A schematic structural diagram of a partial structure of the micro speaker according to the first embodiment of the present invention.

[0021] Explanation of the reference numerals of the drawings:

[0022] 1. Basket;

[0023] 2. First vibration assembly; 21. First diaphragm assembly; 22. First voice coil;

[0024] 3. Magnetic circuit assembly; 31. Yoke; 32. Edge magnetic structure; 33. Central magnetic structure; 331. Central main magnet; 332. Central auxiliary magnet; 333. Upper pole piece; 3331. Second gap; 334. Magnetic conduction plate; 3341. First gap; 3342. Flange; 335. Linear gap;

[0025] 4. Second vibration assembly; 41. Second diaphragm assembly; 42. Vertical voice coil. Detailed implementation manners

[0026] The realization of the object, functional features and advantages of the present invention will be further described with reference to the embodiments and the drawings.

[0027] The following will clearly and completely describe the technical solutions in the embodiments of the present invention with reference to the drawings in the embodiments of the present invention. Obviously, the described embodiments are only some embodiments of the present invention, rather than all embodiments. Based on the embodiments of the present invention, all other embodiments obtained by those of ordinary skill in the art without creative efforts belong to the scope of protection of the present invention. [[ID=३३]]

[0028] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present invention, the directional indications are only used to explain the relative positional relationship and movement conditions between components in a specific posture as shown in the drawings. If the specific posture changes, the directional indications will also change accordingly.

[0029] In addition, if the descriptions such as "first" and "second" are involved in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and should not be construed as indicating or implying their relative importance or implicitly specifying the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one such feature.

[0030] In addition, the meaning of "and / or" appearing throughout the text is that it includes three parallel solutions. Taking "and / or" as an example, it includes the solution of A, or the solution of B, or the solution of both A and B being satisfied simultaneously. In addition, the technical solutions between various embodiments can be combined with each other, but it must be based on the ability of those of ordinary skill in the art to implement. When the combination of technical solutions results in contradictions or inability to implement, it should be considered that such a combination of technical solutions does not exist and is not within the scope of protection required by the present utility model.

[0031] In this application, unless otherwise clearly specified and defined, the terms such as "installed", "connected", "coupled", "fixed", etc. shall be understood in a broad sense. For example, it can be a fixed connection, a detachable connection, or integrated; it can be a mechanical connection or an electrical connection; it can be directly connected or indirectly connected through an intermediate medium, and it can be the communication inside two elements or the interaction relationship between two elements. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific circumstances.

[0032] Embodiment 1

[0033] Please refer to Figure 1 and Figure 2, Embodiment 1 of the present utility model is: a micro speaker, comprising a basin 1, a first vibration component 2, a magnetic circuit component 3 and a plurality of second vibration components 4, the first vibration component 2 is arranged on one side of the basin 1, the first vibration component 2 includes a first diaphragm component 21 and a plurality of first voice coils 22 connected to the first diaphragm component 21; the magnetic circuit component 3 is arranged on the other side of the basin 1, the magnetic circuit component 3 includes a yoke 31, a side magnetic structure 32 and a plurality of central magnetic structures 33 arranged in the hollow area corresponding to the first voice coil 22, the yoke 31 is provided with a window, the central magnetic structure 33 corresponds to the window, the central magnetic structure 33 includes a magnetic steel structure, an upper washer 333 and a magnetic conductive plate 334, the magnetic conductive plate 334 is located at the window, the magnetic steel structure includes a central main magnetic steel 331 and a central secondary magnetic steel 332, a straight-line gap 335 is formed between the central main magnetic steel 331 and the central secondary magnetic steel 332, the central main magnetic steel 3 31 connects the magnetic plate 334 and the upper washer 333, the upper washer 333 is located above the central main magnetic steel 331, the central secondary magnetic steel 332 connects the upper washer 333, the yoke 31 and the magnetic plate 334, the magnetic plate 334 has a first gap 3341 corresponding to the I-shaped gap 335, the upper washer 333 has a second gap 3331 corresponding to the I-shaped gap 335, the I-shaped gap 335 is connected to the first The gap 3341 and the second gap 3331 form a vertical magnetic gap; the second vibration component 4 includes a second diaphragm component 41 and two vertical voice coils 42 connected to the second diaphragm component 41, the two vertical voice coils 42 in the second vibration component 4 are arranged opposite to each other, and the vertical voice coils 42 extend into the vertical magnetic gap, and the second diaphragm component 41 is connected to the magnetic conductive plate 334. It is easy to understand that the second vibration component 4 corresponds one-to-one to the central magnetic structure 33.

[0034] The side magnetic structure 32 connects the basin frame 1 and the yoke 31, and a partial area of the first magnetic gap for the movement of the first voice coil 22 is formed between the central magnetic structure 33 and the side magnetic structure 32, and another partial area of the first magnetic gap for the movement of the first voice coil 22 is formed between the two adjacent central magnetic structures 33.

[0035] The edge of the magnetic conductive plate 334 has a flange 3342 bent away from the first vibration component 2, and the outer edge of the second vibration membrane component 41 is connected to the flange 3342. The flange 3342 can reserve sufficient vibration space for the second vibration component 4, thereby avoiding the second vibration membrane and the magnetic conductive plate 334 from colliding when the second vibration component 4 is working.

[0036] At least a partial area of the upper side of the vertical voice coil 42 is located in the second gap 3331, and at least a partial area of the lower side of the vertical voice coil 42 is located in the first gap 3341. For the second vibration assembly 4, the magnetic induction lines at the upper washer 333 and the magnetic conductive plate 334 are the most concentrated. By arranging the upper side and the lower side of the vertical voice coil 42 in these two areas, the vertical voice coil 42 can obtain a greater driving force.

[0037] Two adjacent first voice coils 22 are in contact with each other. Preferably, two adjacent first voice coils 22 are adhesively fixed, which can improve the structural stability of the first vibration assembly 2 and improve the performance of the bass unit. There are many ways to achieve the adhesive fixation of two adjacent first voice coils 22, such as bonding with glue, bonding with double-sided tape, or bonding with the self-adhesive layer on the surface of the wire used to wind the first voice coil 22, etc.

[0038] The number of the first voice coils 22, the number of the central magnetic structures 33, and the number of the second vibration assemblies 4 are equal, which can be set as required in actual products. In this embodiment, the number of the first voice coils 22 is two. That is to say, the micro speaker in this embodiment has two high-frequency units.

[0039] The above are only optional embodiments of the present invention, and do not limit the patent scope of the present invention accordingly. Any equivalent structural transformation made under the inventive concept of the present invention by using the content of the specification and drawings of the present invention, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present invention.

Claims

1. A micro speaker, characterized in that: including a chassis; a first vibration assembly disposed on one side of the chassis, the first vibration assembly including a first diaphragm assembly and a plurality of first voice coils connected to the first diaphragm assembly; a magnetic circuit assembly disposed on the other side of the chassis, the magnetic circuit assembly including a yoke and a plurality of central magnetic structures arranged corresponding to the hollow regions of the first voice coils, the yoke being provided with openings, the central magnetic structures corresponding to the openings, the central magnetic structures including a magnetic steel structure, an upper washer and a magnetic conductive plate, the magnetic conductive plate being located at the opening, the magnetic steel structure including a central main magnetic steel and a central sub-magnetic steel, a linear gap being formed between the central main magnetic steel and the central sub-magnetic steel, the central main magnetic steel connecting the magnetic conductive plate and the upper washer, the upper washer being located above the central main magnetic steel, the central sub-magnetic steel connecting the upper washer, the yoke and the magnetic conductive plate, the magnetic conductive plate having a first gap arranged corresponding to the linear gap, the upper washer having a second gap arranged corresponding to the linear gap, the linear gap communicating with the first gap and the second gap respectively to form a vertical magnetic gap; a plurality of second vibration assemblies, the second vibration assemblies including second diaphragm assemblies and two vertical voice coils connected to the second diaphragm assemblies, the vertical voice coils extending into the vertical magnetic gap, the second diaphragm assemblies being connected to the magnetic conductive plate.

2. The micro-speaker according to claim 1, characterized in that: The edge of the magnetic conductive plate has a flange bent away from the first vibration assembly, and the outer edge of the second diaphragm assembly is connected to the flange.

3. The micro speaker according to claim 1, characterized in that: At least a part of the upper side of the vertical voice coil is located in the second gap, and at least a part of the lower side of the vertical voice coil is located in the first gap.

4. The micro-speaker according to claim 1, wherein: Two adjacent first voice coils are in contact with each other.

5. The micro-speaker according to claim 4, wherein: Two adjacent first voice coils are adhesively fixed.

6. The micro speaker according to claim 1, wherein: The magnetic circuit assembly further includes an edge magnetic structure connecting the chassis and the yoke, and a partial area of a first magnetic gap for the first voice coil to move is formed between the central magnetic structure and the edge magnetic structure.

7. The micro speaker according to claim 1, wherein: The two vertical voice coils in the second vibration assembly are arranged oppositely.

8. The micro speaker according to claim 1, characterized in that: The number of the first voice coils is two.

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