Miniature loudspeaker

Abstract

The miniature loudspeaker comprises a basin stand, a magnetic circuit assembly, a treble vibration assembly, a bass vibration assembly and a conducting piece, the magnetic circuit assembly comprises a yoke, a central magnetic structure and an edge magnetic structure, the central magnetic structure and the edge magnetic structure are respectively arranged on the yoke, the edge magnetic structure is connected with the basin stand, and a bass magnetic gap is formed between the central magnetic structure and the edge magnetic structure. The central magnetic structure comprises a middle magnetic steel, and a lower magnetic steel, a central washer and an annular upper magnetic steel which are sequentially stacked and connected from bottom to top, the central washer is provided with a protruding hollow convex hull, the hollow convex hull is located in a hollow area of the annular upper magnetic steel, and a high-pitch magnetic gap is formed between the hollow convex hull and the annular upper magnetic steel; the middle magnetic steel is arranged on the lower magnetic steel and located in the hollow convex hull. The high-pitch vibration assembly comprises a high-pitch vibration diaphragm assembly and a high-pitch voice coil which are connected, the high-pitch vibration diaphragm assembly is connected with the annular upper magnetic steel, and the high-pitch voice coil is arranged corresponding to the high-pitch magnetic gap. The miniature loudspeaker is thin in thickness and good in acoustic 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] The tweeter and woofer of the coaxial micro speaker each contain an independent vibration system and magnetic circuit system, and the structure is complex. The overall height of the coaxial micro speaker composed of the tweeter and woofer is increased, which makes it inconvenient to install due to its high height, reducing the applicability of the product. In addition, the coaxial micro speaker requires the design of a conduction circuit, which will take up a large space, thereby limiting the improvement of the acoustic performance of the coaxial micro speaker. Utility Model Content

[0003] The technical problem solved by the utility model is to provide a micro loudspeaker with good acoustic performance and thin thickness.

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

[0005] basin rack;

[0006] A magnetic circuit assembly, comprising a yoke and a central magnetic structure and a side magnetic structure respectively provided on the yoke, the side magnetic structure being connected to the basin frame, a bass magnetic gap being formed between the central magnetic structure and the side magnetic structure, the central magnetic structure comprising a central magnetic steel and a lower magnetic steel, a central washer, and an annular upper magnetic steel stacked and connected in sequence from bottom to top, the central washer having a protruding hollow bulge, the hollow bulge being located within the hollow region of the annular upper magnetic steel, a treble magnetic gap being formed between the hollow bulge and the annular upper magnetic steel, the central magnetic steel being provided on the lower magnetic steel and located within the hollow bulge;

[0007] A tweeter vibration assembly, the tweeter vibration assembly comprising a connected tweeter diaphragm assembly and a tweeter voice coil, the tweeter diaphragm assembly being connected to the annular upper magnetic steel, and the tweeter voice coil being arranged corresponding to the tweeter magnetic gap;

[0008] A bass vibration assembly, the bass vibration assembly comprising a connected bass diaphragm assembly and a bass voice coil, the bass diaphragm assembly being arranged around the tweeter diaphragm assembly, the bass diaphragm assembly being connected to the annular upper magnetic steel and the basin frame, and the bass voice coil being arranged corresponding to the bass magnetic gap;

[0009] The conductive part, the top of the hollow bulge, the lower magnetic steel and the middle magnetic steel respectively have through holes for the conductive part to pass through, the conductive part has an inner conductive part and an outer conductive part that are electrically connected, the inner conductive part is electrically connected to the tweeter voice coil, and the yoke has an air-proof window for exposing the outer conductive part.

[0010] In one embodiment, the lower magnet and the middle magnet are of an integral structure.

[0011] In one embodiment, the hollow boss is a stamping structure formed by stamping.

[0012] In one embodiment, the central washer further includes a flat plate portion. The hollow boss includes a top plate and a connecting wall. The top of the connecting wall is connected to the flat plate portion, and the bottom of the connecting wall is connected to the flat plate portion. The perforation on the hollow boss is provided on the top plate.

[0013] In one embodiment, the top surface of the middle magnet contacts the bottom surface of the top plate.

[0014] In one embodiment, the connecting wall is a continuous ring frame structure.

[0015] In one embodiment, the connecting walls are respectively connected to opposite sides of the top plate.

[0016] In one embodiment, the conducting member is an FPC board. The conducting member includes a first arm, a second arm, and a third arm. The two ends of the first arm are respectively and perpendicularly connected to the second arm. The end of the second arm away from the first arm is perpendicularly connected to the third arm. The first arm is fixed on the bottom surface of the lower magnet and is located within the clearance window. The second arm passes through the perforation. The third arm is fixed on the top surface of the hollow boss. The inner conducting portion is provided on the third arm, and the outer conducting portion is provided on the first arm.

[0017] In one embodiment, the thickness of the first arm is less than the thickness of the yoke.

[0018] In one embodiment, the central magnetic structure further includes an annular washer provided on the top of the annular upper magnet.

[0019] The beneficial effects of the present utility model are as follows: The structure of this micro speaker is novel. Its high - frequency unit will not protrude excessively, enabling the thickness of the micro speaker to remain relatively thin, so that the micro speaker can be applicable to installation environments with relatively narrow installation spaces, meeting the development trend of the thinning of portable electronic devices. The setting of the middle magnet makes full use of the internal space of the hollow boss, effectively increasing the total volume of the magnet, enhancing the magnetic field strength of the micro speaker, and being conducive to improving the acoustic performance of the micro speaker. Description of the Drawings

[0020] 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 use in 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 be obtained based on the structures shown in these drawings.

[0021] Figure 1 Cross-sectional view of the micro speaker according to the first embodiment of the present invention;

[0022] Figure 2 Structural schematic diagram of the central washer in the micro speaker according to the first embodiment of the present invention;

[0023] Figure 3 Cross-sectional view of the micro speaker according to the second embodiment of the present invention;

[0024] Figure 4 Cross-sectional view of the micro speaker according to the third embodiment of the present invention;

[0025] Figure 5 Structural schematic diagram of the central washer in the micro speaker according to the third embodiment of the present invention.

[0026] Explanation of the reference numerals in the drawings:

[0027] 1. Basket;

[0028] 2. Magnetic circuit assembly; 21. Yoke; 211. Clearance window; 22. Central magnetic structure; 221. Middle magnet; 222. Lower magnet; 223. Central washer; 2231. Flat part; 2232. Hollow convex; 22321. Top plate; 22322. Connecting wall; 2233. Gap; 224. Ring-shaped upper magnet; 225. Ring-shaped washer; 23. Edge magnetic structure;

[0029] 3. High-frequency vibration assembly; 31. High-frequency diaphragm assembly; 32. High-frequency voice coil;

[0030] 4. Low-frequency vibration assembly; 41. Low-frequency diaphragm assembly; 42. Low-frequency voice coil;

[0031] 5. Conductive part; 51. First arm; 52. Second arm; 53. Third arm. Detailed implementation manners

[0032] The realization of the object, functional features and advantages of the present invention will be further described in conjunction with the embodiments and with reference to the drawings.

[0033] Next, the technical solutions in the embodiments of the present utility model will be clearly and completely described in conjunction with the accompanying drawings in the embodiments of the present utility model. Obviously, the described embodiments are only a part of the embodiments of the present utility model, rather than all embodiments. All other embodiments obtained by those of ordinary skill in the art based on the embodiments of the present utility model without creative efforts shall fall within the protection scope of the present utility model.

[0034] It should be noted that if there are directional indications such as up, down, left, right, front, back... in the embodiments of the present utility model, the directional indications are only used to explain the relative position 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.

[0035] In addition, if there are descriptions such as "first", "second", etc. in the embodiments of the present utility model, the descriptions of "first", "second", etc. are only for descriptive purposes and cannot be understood as indicating or implying their relative importance or implicitly indicating the quantity of the indicated technical features. Thus, the features defined with "first" and "second" may explicitly or implicitly include at least one of the features.

[0036] 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, or the solution, or the solution that satisfies both 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 cannot be implemented, it should be considered that such a combination of technical solutions does not exist and is not within the protection scope required by the present utility model.

[0037] In this application, unless otherwise clearly defined and limited, the terms "installed", "connected", "connected", "fixed", etc. should 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 components or the interaction relationship between two components. For those of ordinary skill in the art, the specific meanings of the above terms in this application can be understood according to specific situations.

[0038] Embodiment 1

[0039] Please refer to Figure 1 and Figure 2, Embodiment 1 of the present utility model is: a micro speaker, comprising a chassis 1, a magnetic circuit assembly 2, a high-frequency vibration assembly 3, a low-frequency vibration assembly 4 and a conducting member 5. The magnetic circuit assembly 2 includes a yoke 21, a central magnetic structure 22 and an edge magnetic structure 23 respectively disposed on the yoke 21. The edge magnetic structure 23 is connected to the chassis 1. A low-frequency magnetic gap is formed between the central magnetic structure 22 and the edge magnetic structure 23. The central magnetic structure 22 includes a middle magnet 221 and a lower magnet 222, a central washer 223 and an annular upper magnet 224 which are stacked and connected in sequence from bottom to top. The central washer 223 has a protruding hollow boss 2232. The hollow boss 2232 is located in the hollow area of the annular upper magnet 224. A high-frequency magnetic gap is formed between the hollow boss 2232 and the annular upper magnet 224. The middle magnet 221 is disposed on the lower magnet 222 and located within the hollow boss 2232. In this embodiment, the lower magnet 222 and the middle magnet 221 are of a split structure and are adhesively connected;

[0040] The high-frequency vibration assembly 3 includes a connected high-frequency diaphragm assembly 31 and a high-frequency voice coil 32. The high-frequency diaphragm assembly 31 is connected to the annular upper magnet 224. The high-frequency voice coil 32 is disposed corresponding to the high-frequency magnetic gap. The low-frequency vibration assembly 4 includes a connected low-frequency diaphragm assembly 41 and a low-frequency voice coil 42. The low-frequency diaphragm assembly 41 is disposed around the high-frequency diaphragm assembly 31. The low-frequency diaphragm assembly 41 is connected to the annular upper magnet 224 and the chassis 1. The low-frequency voice coil 42 is disposed corresponding to the low-frequency magnetic gap;

[0041] The top of the hollow boss 2232, the lower magnet 222 and the middle magnet 221 respectively have through holes for the conducting member 5 to penetrate. The conducting member 5 has an internally conducting portion and an externally conducting portion which are electrically connected. The internally conducting portion is electrically connected to the high-frequency voice coil 32. The yoke 21 has a clearance window 211 for the externally conducting portion to be exposed. In this embodiment, the lead of the high-frequency voice coil 32 is welded to the internally conducting portion.

[0042] As a preferred embodiment, the hollow convex hull 2232 is a stamping structure formed by stamping. The forming process of the hollow convex hull 2232 is simple and convenient, which is conducive to controlling the manufacturing cost of the micro speaker. Specifically, the central washer 223 further includes a flat plate portion 2231. The hollow convex hull 2232 includes a top plate 22321 and a connecting wall 22322. The top of the connecting wall 22322 is connected to the flat plate portion 2231, and the bottom of the connecting wall 22322 is connected to the flat plate portion 2231. The perforation on the hollow convex hull 2232 is provided on the top plate 22321. When stamping the hollow convex hull 2232, the central area of the flat plate can be stamped to form the hollow convex hull 2232, and the area of the flat plate that is not stamped forms the flat plate portion 2231.

[0043] Preferably, the top surface of the middle magnet 221 contacts the bottom surface of the top plate 22321. In this embodiment, the connecting wall 22322 is a continuous ring frame structure.

[0044] Optionally, the conducting member 5 is an FPC board. The conducting member 5 includes a first arm 51, a second arm 52, and a third arm 53. The two ends of the first arm 51 are respectively and perpendicularly connected to the second arm 52. One end of the second arm 52 away from the first arm 51 is perpendicularly connected to the third arm 53. The first arm 51 is fixed to the bottom surface of the lower magnet 222 and is located within the clearance window. The second arm 52 passes through the perforation. The third arm 53 is fixed to the top surface of the hollow convex hull 2232. The inner conducting portion is provided on the third arm 53, and the outer conducting portion is provided on the first arm 51.

[0045] To enable the first arm 51 to be protected to a certain extent, it is preferred that the thickness of the first arm 51 is less than the thickness of the yoke 21.

[0046] To improve the acoustic performance of the micro speaker, in this embodiment, the central magnetic structure 22 further includes an annular washer 225 provided on the top of the annular upper magnet 224.

[0047] Embodiment Two

[0048] Please refer to Figure 3 , Embodiment Two of the present utility model is a further improvement on the magnetic circuit component 2 based on Embodiment One. The difference from Embodiment One is that the lower magnet 222 and the middle magnet 221 are an integral structure, that is to say, the lower magnet 222 and the middle magnet 221 are integrally processed and formed as an integral structure. In this way, the number of components of the micro speaker is reduced, the assembly work of the micro speaker is facilitated, the assembly cost of the micro speaker is reduced, and the production efficiency of the micro speaker is improved.

[0049] Embodiment 3

[0050] Please refer to Figure 4 and Figure 5 Embodiment 3 of the present utility model is an alternative technical solution to Embodiment 2. The difference from Embodiment 2 is that the connecting wall 22322 of the hollow convex part 2232 of the central washer 223 is not a continuous ring frame structure. In this embodiment, connecting walls 22322 are respectively connected to opposite sides of the top plate 22321 of the hollow convex part 2232, and a gap 2233 is formed between the end of the top plate 22321 and the flat plate part 2231. This can reduce the manufacturing consumables of the central washer 223, facilitate saving material costs, and at the same time, facilitate the stamping forming of the hollow convex part 2232.

[0051] The above are only alternative embodiments of the present utility model, and do not limit the patent scope of the present utility model accordingly. Any equivalent structural transformation made under the inventive concept of the present utility model by using the content of the specification and drawings of the present utility model, or any direct / indirect application in other related technical fields is included in the patent protection scope of the present utility model.

Claims

1. A micro speaker, characterized in that: Comprising A chassis; A magnetic circuit assembly, the magnetic circuit assembly including a yoke and a central magnetic structure and side magnetic structures respectively disposed on the yoke, the side magnetic structures connecting the chassis, a bass magnetic gap being formed between the central magnetic structure and the side magnetic structures, the central magnetic structure including a middle magnet and a lower magnet, a central washer and an annular upper magnet stacked and connected in sequence from bottom to top, the central washer having a protruding hollow convex, the hollow convex being located within the hollow area of the annular upper magnet, a treble magnetic gap being formed between the hollow convex and the annular upper magnet, and the middle magnet being disposed on the lower magnet and within the hollow convex; A treble vibration assembly, the treble vibration assembly including a connected treble diaphragm assembly and a treble voice coil, the treble diaphragm assembly connecting the annular upper magnet, and the treble voice coil being disposed corresponding to the treble magnetic gap; A bass vibration assembly, the bass vibration assembly including a connected bass diaphragm assembly and a bass voice coil, the bass diaphragm assembly surrounding the treble diaphragm assembly, the bass diaphragm assembly connecting the annular upper magnet and the chassis, and the bass voice coil being disposed corresponding to the bass magnetic gap; A conducting member, the top of the hollow convex, the lower magnet and the middle magnet respectively having perforations through which the conducting member passes, the conducting member having an internally conducting portion and an externally conducting portion that are electrically connected, the internally conducting portion being electrically connected to the treble voice coil, and the yoke having a clearance window for the externally conducting portion to be exposed; 2. The micro speaker according to claim 1, characterized in that: The lower magnet and the middle magnet are of an integral structure.

3. The micro speaker according to claim 1, characterized in that: The hollow convex is a stamping structure formed by stamping.

4. The micro speaker according to claim 1, characterized in that: The central washer further includes a flat plate portion, the hollow convex including a top plate and a connecting wall, the top of the connecting wall connecting the flat plate portion, the bottom of the connecting wall connecting the flat plate portion, and the perforation on the hollow convex being disposed on the top plate.

5. The micro speaker according to claim 4, characterized in that: The top surface of the middle magnet contacts the bottom surface of the top plate.

6. The micro speaker according to claim 4, characterized in that: The connecting wall is a continuous ring frame structure.

7. The micro-speaker according to claim 4, wherein: The connecting walls are respectively connected to opposite sides of the top plate.

8. The micro speaker according to claim 1, characterized in that: The conducting member is an FPC board, the conducting member including a first arm, a second arm and a third arm, the two ends of the first arm being respectively vertically connected to the second arm, and the end of the second arm away from the first arm being vertically connected to the third arm, the first arm being fixed to the bottom surface of the lower magnet and within the clearance window, the second arm passing through the perforation, the third arm being fixed to the top surface of the hollow convex, the internally conducting portion being disposed on the third arm, and the externally conducting portion being disposed on the first arm.

9. The micro-speaker according to claim 8, wherein: The thickness of the first arm is less than the thickness of the yoke.

10. The micro-speaker according to claim 1, characterized in that: The central magnetic structure further includes an annular washer disposed on the top of the annular upper magnet.

Images