Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a diaphragm assembly, a conductive FPC, a voice coil and a magnetic circuit assembly, the diaphragm assembly comprises a voice diaphragm, the voice diaphragm comprises an inner fixing part, an inner folding ring part, a connecting part, an outer folding ring part and an outer fixing part which are sequentially connected from inside to outside, and the outer fixing part is connected with the basin stand; the conductive FPC is arranged on the bottom surface of the voice diaphragm, the conductive FPC comprises an inner mounting part, a cantilever part and an outer mounting part which are connected in sequence, the inner mounting part is provided with an inner bonding pad, the outer mounting part is provided with an outer bonding pad, the inner mounting part is located on the connecting part, the cantilever part is located on the inner folding ring part, the outer mounting part is located on the inner fixing part, and the inner fixing part is provided with a window for exposing the outer bonding pad; the voice coil is connected with the connecting part; a lead of the voice coil is welded and conducted with the inner bonding pad; the magnetic circuit assembly is connected with the basin stand, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, the inner fixing part is fixed on the central magnetic structure, and the central magnetic structure is also provided with a mounting groove for mounting the outer mounting part. The sounding unit is novel in structure and good in performance.

Description

TECHNICAL FIELD

[0001] The utility model relates to electroacoustic transducer technical field especially relates to sounding unit. BACKGROUND

[0002] Miniature 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, the miniature loudspeakers used are being popularized to large-amplitude loudspeakers or super-linear loudspeakers.

[0003] With the development of society, the thickness of the miniature loudspeaker is getting smaller and smaller, and its performance has a certain degree of attenuation. In a conventional miniature loudspeaker, the conductive structure (such as FPC soft board) will occupy a lot of space for installing the magnetic circuit assembly, which undoubtedly affects the magnetic field strength of the miniature loudspeaker, resulting in the performance loss of the miniature loudspeaker. SUMMARY

[0004] The technical problem to be solved by the utility model is to provide a high-performance sounding unit.

[0005] In order to solve the above technical problem, the utility model adopts the technical scheme of: a sounding unit, comprising:

[0006] A yoke;

[0007] A diaphragm assembly, the diaphragm assembly comprising a sound film, the sound film comprising an inner fixed part, an inner folded ring part, a connecting part, an outer folded ring part and an outer fixed part connected in sequence from inside to outside, the outer fixed part being connected to the yoke;

[0008] A conductive FPC, the conductive FPC being arranged on the bottom surface of the sound film, the conductive FPC comprising an inner mounting part, a cantilever part and an outer mounting part connected in sequence, the inner mounting part being provided with an inner solder pad, the outer mounting part being provided with an outer solder pad, the inner mounting part being located on the connecting part, the cantilever part being located on the inner folded ring part, the outer mounting part being located on the inner fixed part, the inner fixed part having a window for exposing the outer solder pad;

[0009] A voice coil, the voice coil being connected to the connecting part, the lead wire of the voice coil being welded in conduction with the inner solder pad;

[0010] A magnetic circuit assembly, the magnetic circuit assembly being connected to the yoke, the magnetic circuit assembly comprising a yoke and a center magnetic structure arranged on the yoke, the inner fixed part being fixed on the top surface of the center magnetic structure, the top surface of the center magnetic structure further being provided with a mounting groove for mounting the outer mounting part.

[0011] Further, the sound film and the conductive FPC are integrally injection molded into an integrated structure.

[0012] Further, the inner folding ring portion has a wrapping portion wrapping the cantilever portion.

[0013] Further, each region of the cantilever portion is wrapped by the wrapping portion.

[0014] Further, the number of the conductive FPCs is two, and the two conductive FPCs are symmetrically arranged.

[0015] Further, the inner pad is located at the inner side of the voice coil.

[0016] Further, the connecting portion has a convex ring protruding towards the yoke, the convex ring connects the voice coil, the convex ring is provided with a notch, the inner mounting portion passes through the convex ring, and the inner pad is located at the outer side of the voice coil.

[0017] Further, the height of the convex ring is greater than or equal to the thickness of the inner mounting portion.

[0018] Further, the center magnetic structure comprises a lower center magnetic steel, a center dust shield and an upper center magnetic steel connected in sequence from bottom to top, the upper center magnetic steel is opposite to the lower center magnetic steel in magnetic pole direction, and the mounting groove is arranged on the top surface of the upper center magnetic steel.

[0019] Further, the outer edge of the upper center magnetic steel and the edge of the top surface of the center dust shield form an avoiding step for avoiding the inner folding ring portion.

[0020] The sound generating unit has the advantages that: the sound generating unit has a novel structure, the conductive FPC is arranged on the diaphragm, the conductive FPC does not need to occupy the arrangement space of the magnetic circuit assembly, the magnetic steel in the sound generating unit can be arranged to be larger, the BL value of the sound generating unit is improved, and the performance of the sound generating unit is improved. The external conduction structure can be connected with the external pad by using elastic feet or POGO pins, the material and welding process of the external FPC are saved, and the production and use processes are optimized. BRIEF DESCRIPTION OF DRAWINGS

[0021] Fig. 1 is a sectional view of the sound generating unit of the utility model embodiment one;

[0022] Fig. 2 is a structure schematic view of the diaphragm assembly in the sound generating unit of the utility model embodiment one;

[0023] Fig. 3 is a structure schematic view of part of the structure of the sound generating unit of the utility model embodiment one.

[0024] REFERENCE SIGNS:

[0025] 1, a stand;

[0026] 2, diaphragm assembly; 21, sound film; 211, inner fixed part; 212, inner folded ring part; 213, connecting part; 214, outer folded ring part; 215, outer fixed part; 216, window; 217, wrapping part; 218, convex ring; 219, notch; 22, ball top;

[0027] 3, conductive FPC; 31, inner mounting part; 32, cantilever part; 33, outer mounting part; 331, outer solder pad;

[0028] 4, voice coil;

[0029] 5, magnetic circuit assembly; 51, yoke; 52, center magnetic structure; 521, lower center magnetic steel; 522, center magnetic steel; 523, upper center magnetic steel; 524, avoidance step; 525, mounting groove; 53, edge magnetic structure. DETAILED DESCRIPTION

[0030] In order to explain the technical content, the purpose and the effect of the present application in detail, the following will be described in combination with the embodiments and the drawings.

[0031] Please refer to Figs. 1-3 , sound unit, comprising:

[0032] Pot rack 1;

[0033] Diaphragm assembly 2, the diaphragm assembly 2 includes sound film 21, the sound film 21 includes inner fixed part 211, inner folded ring part 212, connecting part 213, outer folded ring part 214 and outer fixed part 215 connected in turn from inside to outside, the outer fixed part 215 is connected with the pot rack 1;

[0034] Conductive FPC 3, the conductive FPC 3 is arranged on the bottom surface of the sound film 21, the conductive FPC 3 includes inner mounting part 31, cantilever part 32 and outer mounting part 33 connected in turn, the inner mounting part 31 is provided with inner solder pad, the outer mounting part 33 is provided with outer solder pad 331, the inner mounting part 31 is located on the connecting part 213, the cantilever part 32 is located on the inner folded ring part 212, the outer mounting part 33 is located on the inner fixed part 211, the inner fixed part 211 has window 216 for exposing the outer solder pad 331;

[0035] Voice coil 4, the voice coil 4 is connected with the connecting part 213, the lead wire of the voice coil 4 is welded with the inner solder pad in conduction;

[0036] Magnetic circuit assembly 5, the magnetic circuit assembly 5 is connected with the pot rack 1, the magnetic circuit assembly 5 includes yoke 51 and center magnetic structure 52 arranged on the yoke 51, the inner fixed part 211 is fixed on the top surface of the center magnetic structure 52, the top surface of the center magnetic structure 52 is further provided with mounting groove 525 for mounting the outer mounting part 33.

[0037] From the above description, the beneficial effects of the utility model lie in: the sound generating unit structure is novel, the conductive FPC 3 is arranged on the sound film 21, the conductive FPC 3 does not need to encroach on the setting space of the magnetic circuit assembly 5, so that the magnetic steel in the sound generating unit can be arranged larger, thereby improving the BL value of the sound generating unit, and further improving the performance of the sound generating unit. The external conduction structure can utilize elastic legs or pogopin to conduct with the external pad 331, and the material and welding process of external FPC are saved, and the production and use process are optimized.

[0038] Further, the sound film 21 and the conductive FPC 3 are integrally injection molded into an integrated structure.

[0039] From the above description, the sound film 21 and the conductive FPC 3 integrally injection molded can facilitate the production and manufacture of the sound generating unit.

[0040] Further, the inner folding ring part 212 has a wrapping part 217 wrapping the cantilever part 32.

[0041] From the above description, in the process of vibration, the cantilever part 32 will also be deformed, and the existence of the wrapping part 217 can prevent the cantilever part 32 from separating from the inner folding ring part 212, which is beneficial to ensure the structural stability of the sound generating unit.

[0042] Further, each area of the cantilever part 32 is wrapped by the wrapping part 217.

[0043] From the above description, the wrapping effect of the wrapping part 217 on the cantilever part 32 is good, and the risk of separation of the cantilever part 32 and the inner folding ring part 212 can be completely eliminated.

[0044] Further, the number of the conductive FPC 3 is two, and the two conductive FPC 3 are symmetrically arranged.

[0045] From the above description, the two symmetrically arranged conductive FPC 3 can make it easier to adjust the center of gravity of the diaphragm assembly 2.

[0046] Further, the inner pad is located on the inner side of the voice coil 4.

[0047] Further, the connecting part 213 has a convex ring 218 protruding towards the direction close to the yoke 51, the convex ring 218 connects the voice coil 4, the convex ring 218 is provided with a notch 219, the inner mounting part 31 passes through the convex ring 218, and the inner pad is located on the outer side of the voice coil 4.

[0048] As can be seen from the above description, the convex ring 218 can make the voice coil 4 sink, so that more areas of the voice coil 4 can sink into the effective magnetic gap, thereby improving the performance of the sound unit.

[0049] Further, the height of the convex ring 218 is greater than or equal to the thickness of the inner mounting portion 31.

[0050] As can be seen from the above description, the convex ring 218 has a large height, which can avoid the unstable connection of the voice coil 4 and the connecting portion 213 due to the existence of the inner mounting portion 31.

[0051] Further, the center magnetic structure 52 includes a lower center magnetic steel 521, a center dust shield 522 and an upper center magnetic steel 523 connected in sequence from bottom to top, the magnetic pole direction of the upper center magnetic steel 523 is opposite to that of the lower center magnetic steel 521, and the mounting groove 525 is arranged on the top surface of the upper center magnetic steel 523.

[0052] As can be seen from the above description, such a center magnetic structure 52 can guide more magnetic induction lines into the magnetic gap, thereby improving the magnetic utilization rate of the magnetic circuit assembly 5 and the driving force of the sound unit.

[0053] Further, the outer edge of the upper center magnetic steel 523 and the edge of the top surface of the center dust shield 522 form an avoidance step 524 for avoiding the inner folded ring portion 212.

[0054] As can be seen from the above description, the existence of the avoidance step 524 can avoid the collision between the inner folded ring portion 212 and the center magnetic structure 52, thereby facilitating to ensure the working stability of the sound unit.

[0055] Embodiment one

[0056] Please refer to Figs. 1-3The utility model discloses an embodiment one is: sounding unit, including basin frame 1, diaphragm subassembly 2, conductive FPC 3, voice coil 4 and magnetic circuit subassembly 5, diaphragm subassembly 2 includes sound film 21, sound film 21 includes by inside outward sequentially connected fixed part 211 in, inside fold ring part 212, connecting part 213, outside fold ring part 214 and fixed part 215 out, fixed part 215 connects basin frame 1, conductive FPC 3 is located at the bottom surface of sound film 21, preferably sound film 21 and conductive FPC 3 are integrally injection molded as integral type structure, conductive FPC 3 includes sequentially connected inside mounting part 31, cantilever part 32 and outside mounting part 33, be equipped with inside pad on inside mounting part 31, be equipped with outside pad 331 on outside mounting part 33, inside mounting part 31 is located on connecting part 213, cantilever part 32 is located on inside fold ring part 212, in the process of diaphragm subassembly 2 vibration sounding, cantilever part 32 will deform along with inside fold ring part 212, outside mounting part 33 is located on inside fixed part 211, inside fixed part 211 has the window 216 for outside pad 331 exposure, voice coil 4 connects connecting part 213, the lead of voice coil 4 and inside pad welding conduction, magnetic circuit subassembly 5 connects basin frame 1, magnetic circuit subassembly 5 includes yoke 51 and respectively located on center magnetic structure 52 and edge magnetic structure 53 of yoke 51, edge magnetic structure 53 surrounds center magnetic structure 52 and sets up, form the magnetic gap for the activity of voice coil 4 between center magnetic structure 52 and edge magnetic structure 53, inside fixed part 211 is fixed on the top surface of center magnetic structure 52, the top surface of center magnetic structure 52 is also equipped with the mounting groove 525 for installing outside mounting part 33, the existence of mounting groove 525 can let inside fixed part 211 and the top surface of center magnetic structure 52 realize plane bonding fixed.

[0057] Outside mounting part 33 and inside fixed part 211 are all fixedly connected with center magnetic structure 52, therefore, when diaphragm subassembly 2 vibrates, outside mounting part 33 and inside fixed part 211 do not participate in the vibration of diaphragm subassembly 2.

[0058] To prevent cantilever part 32 from accidentally separating from inside fold ring part 212, inside fold ring part 212 has a wrapping part 217 that wraps cantilever part 32, and the wrapping part 217 is synchronously formed during the injection molding of sound film 21. Specifically, the wrapping part 217 and the fold ring part form a through hole for the cantilever part 32 to pass through. Preferably, each region of the cantilever part 32 is wrapped by the wrapping part 217.

[0059] To further improve the BL value of the sound unit, the edge magnetic structure 53 is preferably in the form of a continuous ring frame. Specifically, the edge magnetic structure 53 includes an edge magnetic steel and an edge Halsier, and the edge magnetic steel connects the yoke 51 and the edge Halsier. In this embodiment, the edge magnetic steel and the edge Halsier are both in the form of a continuous ring frame.

[0060] The number of the conductive FPCs 3 is two, and the two conductive FPCs 3 are preferably symmetrically arranged.

[0061] Optionally, the outer pad 331 is arranged close to the center of the inner fixing portion 211.

[0062] In some embodiments, the inner pad is located on the inner side of the voice coil 4. In this embodiment, the connecting portion 213 has a convex ring 218 protruding towards the yoke 51, the height of the convex ring 218 is greater than or equal to the thickness of the inner mounting portion 31, the convex ring 218 is connected to the voice coil 4, the convex ring 218 is provided with a notch 219, the inner mounting portion 31 passes through the convex ring 218, and the inner pad is located on the outer side of the voice coil 4. It is easy to understand that the convex ring 218 is synchronously formed during the injection molding of the diaphragm 21. In other embodiments, the convex ring 218 can also be in the form of a metal frame, and in this case, the convex ring and the connecting portion 213 are an integral structure formed by insert injection molding.

[0063] The center magnetic structure 52 includes a lower center magnetic steel 521, a center Halsier 522, and an upper center magnetic steel 523 connected in sequence from bottom to top. The upper center magnetic steel 523 has a magnetic pole direction opposite to that of the lower center magnetic steel 521, and the mounting groove 525 is arranged on the top surface of the upper center magnetic steel 523. When the bottom of the upper center magnetic steel 523 is N-pole, the top of the lower center magnetic steel 521 is N-pole, and when the bottom of the upper center magnetic steel 523 is S-pole, the top of the lower center magnetic steel 521 is S-pole.

[0064] The outer edge of the upper center magnetic steel 523 and the edge of the top surface of the center Halsier 522 form an avoidance step 524 for avoiding the inner folding ring portion 212. It is easy to understand that the avoidance step 524 can be naturally formed by controlling the size of the upper center magnetic steel 523 and the center Halsier 522 and adjusting the assembly position, without the need for additional processing of the avoidance step 524 on the upper center magnetic steel 523, which facilitates the manufacturing and production of the sound unit.

[0065] To further improve the acoustic performance of the sound unit, the diaphragm assembly 2 further includes a dome 22 in this embodiment. The dome 22 is in the form of a ring frame as a whole, and the dome 22 is fixed on the connecting portion 213.

[0066] The above merely describes the embodiments of the present application, and does not limit the patent scope of the present application, and any equivalent transformation or direct or indirect application in the related technical field based on the content of the present application specification and drawings is also included in the patent protection scope of the present application.

Claims

1. A sound emitting unit, characterized by, The application relates to a loudspeaker, which comprises a frame, a diaphragm assembly, a conductive FPC and a magnetic circuit assembly. The diaphragm assembly comprises a diaphragm, which comprises an inner fixed part, an inner folded ring part, a connecting part, an outer folded ring part and an outer fixed part connected in sequence from inside to outside, and the outer fixed part is connected with the frame. The conductive FPC is arranged on the bottom surface of the diaphragm, and comprises an inner mounting part, a cantilever part and an outer mounting part connected in sequence, the inner mounting part is provided with an inner solder pad, the outer mounting part is provided with an outer solder pad, the inner mounting part is arranged on the connecting part, the cantilever part is arranged on the inner folded ring part, the outer mounting part is arranged on the inner fixed part, and the inner fixed part is provided with a window for exposing the outer solder pad. An audio coil is connected with the connecting part, and the lead wire of the audio coil is welded with the inner solder pad. The magnetic circuit assembly is connected with the frame, and comprises a yoke and a center magnetic structure arranged on the yoke, the inner fixed part is fixed on the top surface of the center magnetic structure, and the top surface of the center magnetic structure is further provided with a mounting groove for mounting the outer mounting part. The diaphragm and the conductive FPC are integrally injection molded into an integrated structure.

2. The sound producing unit of claim 1, wherein, The inner folded ring part is provided with a wrapping part for wrapping the cantilever part.

3. The sound producing unit of claim 2, wherein, Each region of the cantilever part is wrapped by the wrapping part.

4. The sound producing unit of claim 3, wherein, The number of the conductive FPCs is two, and the two conductive FPCs are symmetrically arranged.

5. The sound producing unit of claim 1, wherein, The inner solder pad is located on the inner side of the audio coil.

6. The sound producing unit of claim 1, wherein, The connecting part is provided with a convex ring protruding towards the yoke, the convex ring is connected with the audio coil, the convex ring is provided with a notch, the inner mounting part passes through the convex ring, and the inner solder pad is located on the outer side of the audio coil.

7. The sound producing unit of claim 1, wherein, The height of the convex ring is greater than or equal to the thickness of the inner mounting part.

8. The sound producing unit of claim 7, wherein, The center magnetic structure comprises a lower center magnetic steel, a center dust shield and an upper center magnetic steel connected in sequence from bottom to top, the magnetic pole direction of the upper center magnetic steel is opposite to that of the lower center magnetic steel, and the mounting groove is arranged on the top surface of the upper center magnetic steel.

9. The sound producing unit of claim 1, wherein, The outer edge of the upper center magnetic steel and the edge of the top surface of the center dust shield form an avoiding step for avoiding the inner folded ring part.

10. The sound producing unit of claim 9, wherein, ​

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