Sound production unit

Abstract

The utility model discloses a sounding unit, including basin stand, diaphragm subassembly, conducting circuit, voice coil and magnetic circuit subassembly, diaphragm subassembly includes the voice diaphragm, the voice diaphragm includes the internal fixed part, infolding ring part, connecting part, outer folding ring part and external fixed part that connect from inside to outside in proper order, the external fixed part connects the basin stand; the conductive circuit is arranged on the bottom surface of the voice diaphragm, the conductive circuit comprises an inner bonding pad, a conductive wire and an outer bonding pad which are connected in sequence, the inner bonding pad is located on the connecting part, the outer bonding pad 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, and a lead of the voice coil is welded and conducted with the inner bonding pad; the magnetic circuit assembly is connected with the basin frame, the magnetic circuit assembly comprises a yoke and a central magnetic structure arranged on the yoke, and the outer bonding pad and the inner fixing part are respectively fixed on the top surface of the central magnetic structure. 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 loudspeaker is widely used in portable electronic equipment such as mobile phone, notebook computer, hearing aid. With the rapid development of these portable electronic equipment, the miniature loudspeaker used is popularizing large amplitude loudspeaker or super linear loudspeaker.

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

[0004] The utility model wants to solve the technical problem of providing a kind of high-performance sounding unit.

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

[0006] Frame;

[0007] Diaphragm assembly, the diaphragm assembly includes sound film, the sound film includes sequentially connected from inside to outside inner fixed part, inner ring part, connecting part, outer ring part and outer fixed part, the outer fixed part is connected with the frame;

[0008] Conductive circuit, the conductive circuit is arranged on the bottom surface of the sound film, the conductive circuit includes sequentially connected inner pad, conductive trace and outer pad, the inner pad is located in the connecting part, the outer pad is located on the inner fixed part, the inner fixed part has the window for the outer pad to expose;

[0009] Voice coil, the voice coil is connected with the connecting part, the lead of the voice coil is welded with the inner pad in conduction;

[0010] Magnetic circuit assembly, the magnetic circuit assembly is connected with the frame, the magnetic circuit assembly includes yoke and center magnetic structure arranged on the yoke, the outer pad and the inner fixed part are fixed on the top surface of the center magnetic structure.

[0011] Further, the number of the conductive circuit is two, and the two conductive circuits are symmetrically arranged.

[0012] Further, the inner pad is located on the outside or inside of the voice coil.

[0013] Further, the outer pad is arranged close to the center of the inner fixed part.

[0014] Further, the conductive trace is coated and formed on the sound film.

[0015] Further, the conductive trace is located on the region of the inner fixing part and is bonded and fixed with the top surface of the center magnetic structure.

[0016] 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 inner fixing part and the outer pad are fixedly connected to the top surface of the upper center magnetic steel, and the magnetic pole direction of the upper center magnetic steel is opposite to that of the lower center magnetic steel.

[0017] 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 folded ring part.

[0018] Further, the magnetic circuit assembly further comprises a side magnetic structure arranged on the yoke, the center magnetic structure and the side magnetic structure form a magnetic gap for the voice coil to move, and the side magnetic structure is in the form of a continuous ring frame.

[0019] Further, the diaphragm assembly further comprises a ball top, the ball top is in the form of a whole ring frame, and the ball top is fixed on the connecting part.

[0020] The sound generating unit has the advantages that the structure is novel, the flexible conductive trace is arranged on the sound film, the conductive trace does not need to occupy the arrangement space of the magnetic circuit assembly, the magnetic steel in the sound generating unit can 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 outer pad by using elastic feet or pogopins, the material of the external FPC and the welding process 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 sectional view of the sound generating unit of the utility model embodiment two.

[0024] LABEL EXPLANATION:

[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; 22, ball top;

[0027] 3, conductive circuit; 31, inner pad; 32, conductive trace; 33, outer pad;

[0028] 4, voice coil;

[0029] 5, magnetic circuit assembly; 51, yoke; 52, center magnetic structure; 521, lower center magnetic steel; 522, center dust shield; 523, upper center magnetic steel; 524, avoidance step; 53, side magnetic structure. DETAILED DESCRIPTION

[0030] To make the technical content of the utility model, the purpose and effect realized clear, the following will be described in detail in combination with the embodiment and the drawings.

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

[0032] Pot frame 1;

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

[0034] Conductive circuit 3, the conductive circuit 3 is arranged on the bottom surface of the sound film 21, the conductive circuit 3 includes sequentially connected inner pad 31, conductive trace 32 and outer pad 33, the inner pad 31 is located in the connecting part 213, the outer pad 33 is located on the inner fixed part 211, the inner fixed part 211 has the window 216 for the outer pad 33 to expose;

[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 pad 31 and is in conduction;

[0036] Magnetic circuit assembly 5, the magnetic circuit assembly 5 is connected with the pot frame 1, the magnetic circuit assembly 5 includes yoke 51 and center magnetic structure 52 arranged on the yoke 51, the outer pad 33 and the inner fixed part 211 are fixed on the top surface of the center magnetic structure 52 respectively.

[0037] The utility model discloses the beneficial effect in the above description is at: the sound unit structure novel, set up flexible conductive circuit 3 on sound film 21, and flexible conductive circuit 3 does not need to encroach on the setting space of magnetic circuit component 5, so that the magnetic steel in sound unit can set up a little larger, thereby improve the BL value of sound unit, and further promote the performance of sound unit. The external lead -through structure can utilize elastic foot or pogo pin etc. with outer pad 33 lead -through, save the material and welding procedure of external FPC, optimized production and use process.

[0038] Further, the number of the conductive lines 3 is two, and the two conductive lines 3 are symmetrically arranged.

[0039] From the above description, the two symmetrically arranged conductive lines 3 can easily adjust the center of gravity of the diaphragm assembly 2.

[0040] Further, the inner pad 31 is located on the outer side or the inner side of the voice coil 4.

[0041] From the above description, the relative position relationship between the inner pad 31 and the voice coil 4 can be set according to actual needs.

[0042] Further, the outer pad 33 is arranged close to the center of the inner fixing portion 211.

[0043] From the above description, the outer pad 33 arranged close to the center of the inner fixing portion 211 can make the external lead -through structure more conveniently lead -through the outer pad 33.

[0044] Further, the conductive trace 32 is formed on the sound film 21.

[0045] From the above description, the conductive trace 32 is formed in a simple manner, which is convenient for processing.

[0046] Further, the region of the conductive trace 32 on the inner fixing portion 211 is adhesively fixed to the top surface of the center magnetic structure 52.

[0047] From the above description, the partial region of the conductive trace 32 is fixedly connected to the center magnetic structure 52, which can improve the structural stability of the sound unit, so that the diaphragm assembly 2 can be more stably connected to the center magnetic structure 52.

[0048] Further, the center magnetic structure 52 comprises a lower center magnetic steel 521, a center dust core 522 and an upper center magnetic steel 523 connected in sequence from bottom to top, the inner fixing portion 211 and the outer pad 33 are fixedly connected to the top surface of the upper center magnetic steel 523, and the magnetic pole direction of the upper center magnetic steel 523 is opposite to that of the lower center magnetic steel 521.

[0049] As can be seen from the above description, the center magnetic structure 52 can guide more magnetic lines into the magnetic gap, thereby improving the magnetic utilization of the magnetic circuit assembly 5 and the driving force of the sound unit.

[0050] 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.

[0051] As can be seen from the above description, the avoidance step 524 can avoid the collision between the inner folded ring portion 212 and the center magnetic structure 52, thereby ensuring the working stability of the sound unit.

[0052] Further, the magnetic circuit assembly 5 further comprises a side magnetic structure 53 arranged on the yoke 51, and the center magnetic structure 52 and the side magnetic structure 53 form a magnetic gap for the movement of the voice coil 4, and the side magnetic structure 53 is in the shape of a continuous ring frame.

[0053] As can be seen from the above description, the side magnetic structure 53 in the shape of a continuous ring frame can provide a stronger magnetic field, thereby making the sound unit have better acoustic performance.

[0054] Further, the diaphragm assembly 2 further comprises a dome 22, and the dome 22 is in the shape of a continuous ring frame, and the dome 22 is fixed on the connecting portion 213.

[0055] As can be seen from the above description, the dome 22 can improve the rigidity of the diaphragm, thereby improving the acoustic performance of the sound unit.

[0056] Embodiment One

[0057] Please refer to Fig. 1 and Fig. 2The utility model discloses an embodiment one for: sounding unit, including basin frame 1, diaphragm subassembly 2, conducting wire 3, voice coil 4 and magnetic circuit subassembly 5, diaphragm subassembly 2 includes sound film 21, the sound film 21 includes by inside outward sequentially connected fixed portion 211 in, inner folding ring portion 212, connecting portion 213, outer folding ring portion 214 and fixed portion 215 out, fixed portion 215 out connects basin frame 1, preferably the sound film 21 is integrally formed integrally formed structure, conducting wire 3 is located at the bottom surface of sound film 21, conducting wire 3 includes sequentially connected inner pad 31, conducting wire 32 and outer pad 33, inner pad 31 is located connecting portion 213, outer pad 33 is located fixed portion 211 in, fixed portion 211 in has the window 216 for outer pad 33 exposure, voice coil 4 connects connecting portion 213, the lead of voice coil 4 and inner pad 31 are welded and are conducted, in this embodiment, inner pad 31 is located the outside of voice coil 4, magnetic circuit subassembly 5 connects basin frame 1, magnetic circuit subassembly 5 includes yoke 51 and respectively located center magnetic structure 52 and edge magnetic structure 53 on yoke 51, edge magnetic structure 53 surrounds center magnetic structure 52 and is arranged, and the magnetic gap for the activity of voice coil 4 is formed between edge magnetic structure 53 and center magnetic structure 52, and outer pad 33 and fixed portion 211 in are fixed on the top surface of center magnetic structure 52 respectively.

[0058] In actual product, conducting wire 32 can be coated and formed or bonded and fixed on sound film 21, in the process of diaphragm subassembly 2 vibration sounding, the area of conducting wire 32 corresponding to inner folding ring portion 212 will change with inner folding ring portion 212.

[0059] In order to improve the structural stability of the sounding unit, the area of the conducting wire 32 on the inner fixed portion 211 is bonded and fixed to the top surface of the center magnetic structure 52. Since the area of the conducting wire 32 corresponding to the inner fixed portion 211, the outer pad 33 and the inner fixed portion 211 are all fixedly connected with the center magnetic structure 52, therefore, when the diaphragm subassembly 2 vibrates, the above three will not participate in the vibration of the diaphragm subassembly 2.

[0060] In order to improve the BL value of the sounding unit to a greater extent, preferably, the edge magnetic structure 53 is in the form of a continuous ring frame, specifically, the edge magnetic structure 53 includes an edge magnetic steel and an edge Halsier, the edge magnetic steel is connected with the yoke 51 and the edge Halsier, and in the embodiment, the edge magnetic steel and the edge Halsier are both in the form of a continuous ring frame.

[0061] The number of the conducting wire 3 is two, and preferably, the two conducting wires 3 are symmetrically arranged.

[0062] Optionally, the outer pad 33 is arranged close to the center of the inner fixing part 211.

[0063] The center magnetic structure 52 comprises a lower center magnetic steel 521, a center dust core 522 and an upper center magnetic steel 523 connected in sequence from bottom to top, the inner fixing part 211 and the outer pad 33 are fixedly connected to the top surface of the upper center magnetic steel 523, the upper center magnetic steel 523 is opposite to the lower center magnetic steel 521 in magnetic pole direction, 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, 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 dust core 522 form an avoiding step 524 for avoiding the inner folding ring part 212, it is easily understood that the avoiding step 524 can be naturally formed by controlling the size of the upper center magnetic steel 523 and the center dust core 522 and adjusting the assembly position, without additional processing the avoiding step 524 on the upper center magnetic steel 523, so that the manufacturing of the sound unit can be facilitated.

[0065] In order to further improve the acoustic performance of the sound unit, in the embodiment, the diaphragm assembly 2 further comprises a dome 22, the dome 22 is in the shape of a ring frame as a whole, and the dome 22 is fixed on the connecting part 213.

[0066] Embodiment two

[0067] Please refer to Fig. 3 The embodiment two of the utility model is parallel technical scheme of embodiment one, and only difference of embodiment one is that inner pad 31 is located at inner side of voice coil 4, so that overall length of conductive wire 32 can be shortened, and manufacturing cost of conductive wire 32 is reduced.

[0068] The above only is the embodiment of the utility model, and does not limit the patent range of the utility model, and equivalent transformation of the utility model specification and the attached drawing contents, or direct or indirect application in related technical field, are all included in the patent protection range of the utility model.

Claims

1. A sound emitting unit, characterized by, The application relates to a loudspeaker, which comprises a frame, a diaphragm assembly, a conductive circuit, a voice coil and a magnetic circuit assembly. The diaphragm assembly comprises a sound membrane, 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 circuit is arranged on the bottom surface of the sound membrane and comprises an inner pad, a conductive trace and an outer pad connected in sequence, the inner pad is located on the connecting part, the outer pad is located on the inner fixed part, and the inner fixed part has a window for exposing the outer pad. The voice coil is connected with the connecting part, and the lead wire of the voice coil is welded with the inner pad. The magnetic circuit assembly is connected with the frame and comprises a yoke and a center magnetic structure arranged on the yoke, and the outer pad and the inner fixed part are fixed on the top surface of the center magnetic structure. The number of the conductive circuits is two, and the two conductive circuits are symmetrically arranged.

2. The sound producing unit of claim 1, wherein, The inner pad is located on the outside or inside of the voice coil.

3. The sound producing unit of claim 1, wherein, The outer pad is arranged close to the center of the inner fixed part.

4. The sound producing unit of claim 1, wherein, The conductive trace is coated and formed on the sound membrane.

5. The sound producing unit of claim 1, wherein, The area of the conductive trace on the inner fixed part is adhesively fixed with the top surface of the center magnetic structure.

6. The sound producing unit of claim 1, 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 inner fixed part and the outer pad are fixedly connected with the top surface of the upper center magnetic steel, and the magnetic pole direction of the upper center magnetic steel is opposite to that of the lower center magnetic steel.

7. 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.

8. The sound producing unit of claim 7, wherein, The magnetic circuit assembly further comprises a side magnetic structure arranged on the yoke, the center magnetic structure and the side magnetic structure form a magnetic gap for the voice coil to move, and the side magnetic structure is in the form of a continuous ring frame.

9. The sound producing unit of claim 1, wherein, The diaphragm assembly further comprises a ball top, which is in the form of a whole ring frame and is fixed on the connecting part.

10. The sound producing unit of claim 1, wherein, ​

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