Sound production unit

Abstract

The utility model discloses a sounding unit, which comprises a basin stand, a magnetic circuit assembly, an inner voice coil, an outer voice coil, a diaphragm assembly and a centering support chip, and is characterized in that the magnetic circuit assembly is connected with the basin stand and comprises a yoke, and a central magnetic structure, a concave magnetic structure and an edge magnetic structure which are respectively arranged on the yoke; the center magnetic structure comprises lower center magnetic steel, a center washer, upper center magnetic steel and an upper magnetic conductive cover which are sequentially connected from bottom to top. The upper magnetic conductive cover comprises a body and a surrounding wall arranged along the edge of the body. The number of the concave magnetic structures is two, the two concave magnetic structures are symmetrically arranged on the two sides of the enclosure bulkhead, a passing opening is formed between the two concave magnetic structures, and an avoiding notch communicated with the passing opening is formed in the bottom end of the enclosure bulkhead. The edge magnetic structure is positioned on the outer side of the concave magnetic structure; the vibrating diaphragm assembly is connected with the basin frame, the upper magnetic conductive cover and the outer voice coil; the centring disk comprises inner installation parts which are connected in sequence, and the inner installation parts are connected with the outer voice coil and the inner voice coil. The sounding unit is novel in structure, thin in thickness and high in performance.

Description

TECHNICAL FIELD

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

[0002] Sounding unit as the common electroacoustic transducer that electric energy is changed into sound energy, it plays an indispensable role in the sound system.

[0003] With the rapid development of mobile phone, tablet computer and other consumer electronics, consumer electronics in performance, size and other aspects to its carrying sounding unit has put forward higher requirements. Double voice coil architecture is a way to improve the performance of sounding unit, but the thickness of traditional double voice coil architecture sounding unit is thicker, cannot adapt to the development trend of consumer electronics thin and light. UTILITY MODEL CONTENT

[0004] The utility model solves the technical problem that provides a kind of light and thin high-performance sounding unit.

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

[0006] Frame;

[0007] Magnetic circuit assembly, the magnetic circuit assembly is connected the frame, the magnetic circuit assembly includes yoke and respectively on the yoke center magnetic structure, concave magnetic structure and side magnetic structure, the center magnetic structure includes by lower to upper sequentially connected lower center magnetic steel, center hua si, upper center magnetic steel and upper magnetic shield, the upper magnetic shield includes body and the wall that is along the rim of the body Setting, the wall and the center magnetic structure between form inside magnetic gap;The number of the concave magnetic structure is two, two the concave magnetic structure is symmetrically arranged on the two sides of the wall, two the concave magnetic structure between form pass, the bottom of the wall is equipped with the avoidance notch that communicates the pass;The side magnetic structure is located the outside of the concave magnetic structure and forms outside magnetic gap between the concave magnetic structure;

[0008] Inner voice coil, the inner voice coil can be lifted and arranged in the inside magnetic gap;

[0009] Outer voice coil, the outer voice coil can be lifted and arranged in the outside magnetic gap;

[0010] Diaphragm assembly, the diaphragm assembly is connected the frame, upper magnetic shield and the outer voice coil;

[0011] The centering branch piece comprises an inner mounting part, a cantilever part and an outer mounting part connected in sequence, the outer mounting part is connected with the yoke, one end of the inner mounting part is connected with the outer voice coil, and the other end of the inner mounting part is connected with the inner voice coil through the through hole and the avoiding gap.

[0012] Further, the vibrating diaphragm assembly comprises a diaphragm, the diaphragm comprises an inner annular part, an inner folded ring part, a connecting part, an outer folded ring part and an outer annular part connected in sequence from inside to outside, the outer annular part is connected with the yoke, the connecting part is connected with the outer voice coil, and the inner annular part is connected with the upper magnetic shield.

[0013] Further, the vibrating diaphragm assembly further comprises a ball top, the ball top comprises a ring frame part and a claw part connected in sequence, the ring frame part is connected with the connecting part, the outer voice coil is indirectly connected with the connecting part through the ring frame part, and the inner mounting part is connected with the claw part.

[0014] Further, the inner mounting part is provided with a solder pad, and the claw part is symmetrically provided with the solder pad on both sides.

[0015] Further, the inner mounting part is arranged corresponding to the middle part of the short axis side or the middle part of the long axis side of the outer voice coil.

[0016] Further, the sound generating unit is a plane-symmetrical structure.

[0017] Further, the surrounding wall is in contact with the yoke.

[0018] Further, the surrounding wall is fixedly connected with the yoke.

[0019] Further, the yoke has an avoiding structure for avoiding the centering branch piece.

[0020] Further, the avoiding structure is a blind groove or a through groove.

[0021] The sound generating unit has stronger driving force due to the double voice coil structure, and has better performance; the upper center magnetic steel and the lower center magnetic steel are designed to have opposite magnetic poles, so that the center magnetic structure has stronger magnetic field, the design of the upper magnetic shield can improve the utilization rate of magnetic force, and the thickness of the center magnetic structure can be designed to be smaller; the magnetic lines of the center magnetic structure and the concave magnetic structure can be guided by the surrounding wall of the upper magnetic shield, so that the magnetic circuit assembly has better magnetic guiding effect and the utilization rate of magnetic force is further improved; in addition, the concave magnetic structure has the advantage of large volume, and the magnetic field strength of the sound generating unit can be improved to a greater extent. BRIEF DESCRIPTION OF DRAWINGS

[0022] Fig. 1 A cross-sectional view of the sound unit of the embodiment one of the present application;

[0023] Fig. 2 An exploded view of the sound unit of the embodiment one of the present application;

[0024] Fig. 3 A structure schematic view of the sound unit of the embodiment one of the present application.

[0025] Label explanation:

[0026] 1, the basin frame;

[0027] 2, magnetic circuit assembly;21, yoke;211, avoid structure;22, center magnetic structure;221, lower center magnetic steel;222, center magnetic steel;223, upper center magnetic steel;224, upper magnetic shield;2241, body;2242, wall;2243, avoid gap;23, concave magnetic structure;24, edge magnetic structure;

[0028] 31, inner voice coil;32, outer voice coil;33, diaphragm assembly;331, sound film;332, ball top;3321, ring frame part;3322, claw part;34, centering support sheet;341, inner mounting part;3411, solder pad;342, cantilever part;343, outer mounting part. DETAILED DESCRIPTION

[0029] In order to explain the technical content, the purpose and effect of the present application in detail, the following will be described in conjunction with the drawings.

[0030] Please refer to Figs. 1-3 , sound unit, comprising:

[0031] Basin frame 1;

[0032] A magnetic circuit assembly 2 is connected to the yoke 1, and comprises a yoke 21 and a center magnetic structure 22, a concave magnetic structure 23 and a side magnetic structure 24 arranged on the yoke 21 respectively.

[0033] An inner voice coil 31 is arranged in the inner magnetic gap in a lifting manner.

[0034] An outer voice coil 32 is arranged in the outer magnetic gap in a lifting manner.

[0035] A diaphragm assembly 33 is connected to the yoke 1, the upper magnetic shield 224 and the outer voice coil 32.

[0036] A centering sheet 34 comprises an inner mounting portion 341, a cantilever portion 342 and an outer mounting portion 343 connected in sequence, the outer mounting portion 343 is connected to the yoke 1, one end of the inner mounting portion 341 is connected to the outer voice coil 32, and the other end of the inner mounting portion 341 passes through the gap and the avoiding gap 2243 and is connected to the inner voice coil 31.

[0037] From the above description, the voice unit has stronger driving force and better performance due to the double voice coil structure; the upper center magnetic steel 223 and the lower center magnetic steel 221 are designed reversely to make the center magnetic structure 22 have stronger magnetic field, the design of the upper magnetic shield 224 can improve the utilization rate of magnetic force, and the thickness of the center magnetic structure 22 can be designed smaller; the magnetic lines of the center magnetic structure 22 and the concave magnetic structure 23 can be guided by the surrounding wall 2242 of the upper magnetic shield 224, which greatly improves the magnetic effect of the magnetic circuit assembly 2 and improves the utilization rate of magnetic force; moreover, the vibration space of the inner voice coil 31 is large, so that the inner voice coil 31 can achieve larger amplitude in limited height space, and the voice unit can realize large amplitude and thinness; in addition, the concave magnetic structure 23 has the advantage of large volume, which can greatly improve the magnetic field strength of the voice unit.

[0038] Further, the vibrating diaphragm assembly 33 comprises a sound diaphragm 331, which comprises, from inside to outside, an inner annular portion, an inner folded annular portion, a connecting portion, an outer folded annular portion, and an outer annular portion, the outer annular portion being connected to the yoke 1, the connecting portion being connected to the outer voice coil 32, and the inner annular portion being connected to the upper magnetic shield 224.

[0039] Further, the vibrating diaphragm assembly 33 further comprises a ball top 332, which comprises a ring frame portion 3321 and a claw portion 3322 connected to each other, the ring frame portion 3321 being connected to the connecting portion, the outer voice coil 32 being indirectly connected to the connecting portion through the ring frame portion 3321, and the inner mounting portion 341 being connected to the claw portion 3322.

[0040] As can be seen from the above description, the provision of the ball top 332 can ensure the rigidity of the vibrating diaphragm assembly 33, the cooperation of the ball top 332 and the inner mounting portion 341 can effectively fix the outer voice coil 32, so that the structure of the sound generating unit is more stable, at the same time, the claw portion 3322 can provide support for the inner mounting portion 341, improve the rigidity of the inner mounting portion, reduce the risk of breakage of the inner mounting portion 341, and ensure the synchronization degree of the amplitudes of the inner voice coil 31 and the outer voice coil 32.

[0041] Further, the inner mounting portion 341 is provided with a solder pad 3411, and the two sides of the claw portion 3322 are symmetrically provided with the solder pad 3411.

[0042] As can be seen from the above description, the inner mounting portion 341 has a reasonable structure, which is beneficial to balance the stress of the inner mounting portion 341.

[0043] Further, the inner mounting portion 341 is provided corresponding to the middle of the short axis side or the middle of the long axis side of the outer voice coil 32.

[0044] As can be seen from the above description, the position of the centering sheet 34 in the sound generating unit can be selected and set according to actual needs.

[0045] Further, the sound generating unit has a plane symmetry structure.

[0046] As can be seen from the above description, the sound generating unit with the plane symmetry structure can effectively improve the polarization phenomenon.

[0047] Further, the surrounding wall 2242 is in contact with the yoke 21.

[0048] As can be seen from the above description, the surrounding wall 2242 and the yoke 21 can support each other, which not only can improve the structural stability of the sound generating unit, but also can maximize the magnetic guiding effect of the upper magnetic shield 224.

[0049] Further, the surrounding wall 2242 is fixedly connected to the yoke 21.

[0050] As can be seen from the above description, the fixed connection of the surrounding wall 2242 and the yoke 21 can greatly improve the structural stability of the sound unit.

[0051] Further, the yoke 21 has a avoiding structure 211 for avoiding the centering sheet 34.

[0052] Further, the avoiding structure 211 is a blind groove or a through groove.

[0053] As can be seen from the above description, the avoiding structure 211 can prevent the centering sheet 34 from colliding with the yoke 21.

[0054] Please refer to Figs. 1-3 The embodiment of the utility model provides: sound unit, including basin frame 1, magnetic circuit component 2, inner voice coil 31, outer voice coil 32, diaphragm assembly 33 and centering sheet 34, magnetic circuit component 2 is connected basin frame 1, magnetic circuit component 2 includes yoke 21 and respectively set on the center magnetic structure 22 of yoke 21, concave magnetic structure 23 and side magnetic structure 24, the center magnetic structure 22 includes by lower to upper sequentially connected lower center magnetic steel 221, center Hu Si 222, upper center magnetic steel 223 and upper magnetic flux guide 224, the bottom of lower center magnetic steel 221 is connected yoke 21, upper magnetic flux guide 224 includes body 2241 and the surrounding wall 2242 along the rim of body 2241 is arranged, body 2241 with surrounding wall 2242 is integrally formed one-piece structure, the inner side magnetic gap is formed between surrounding wall 2242 with center magnetic structure 22, inner voice coil 31 can be lifted and arranged in inner side magnetic gap, the number of concave magnetic structure 23 is two, two concave magnetic structure 23 is symmetrically arranged at the both sides of surrounding wall 2242, and the through opening is formed between two concave magnetic structure 23, and the avoiding gap 2243 of the through opening is arranged in the bottom end of surrounding wall 2242, side magnetic structure 24 is located the outside of concave magnetic structure 23 and forms the outside magnetic gap between concave magnetic structure 23, and outer voice coil 32 can be lifted and arranged in outside magnetic gap, side magnetic structure 24 and / or yoke 21 is connected basin frame 1, diaphragm assembly 33 is connected basin frame 1, upper magnetic flux guide 224 and outer voice coil 32, centering sheet 34 includes sequentially connected inner mounting portion 341, cantilever portion 342 and outer mounting portion 343, outer mounting portion 343 is connected basin frame 1, one end of inner mounting portion 341 is connected outer voice coil 32, the other end of inner mounting portion 341 passes through the through opening and avoiding gap 2243 and is connected inner voice coil 31, when sound unit works, inner voice coil 31 and outer voice coil 32 are vibrated in the same direction and same amplitude, in the embodiment, the sound unit is plane symmetry structure.

[0055] The side magnetic structure 24 comprises a side magnetic steel and a side Halsier, the side Halsier is located above the side magnetic steel, and the side magnetic steel connects the side Halsier and the yoke 21. The concave magnetic structure 23 comprises a concave magnetic steel and a concave Halsier, the concave Halsier is located above the concave magnetic steel, and the concave magnetic steel connects the concave Halsier and the yoke 21. The concave magnetic steel can be an integrated structure integrally processed and formed, or can be combined by a plurality of sub-magnetic steels into a concave shape.

[0056] The vibrating diaphragm assembly 33 comprises a sound diaphragm 331, the sound diaphragm 331 comprises an inner annular part, an inner folded ring part, a connecting part, an outer folded ring part and an outer annular part connected in sequence from inside to outside, the outer annular part is connected to the yoke 1, the connecting part is connected to the outer voice coil 32, and the inner annular part is connected to the upper magnetic shield 224. In order to ensure the thinness of the sound generating unit, the inner annular part is connected to the outer wall surface of the surrounding wall 2242.

[0057] The vibrating diaphragm assembly 33 further comprises a ball top 332, the ball top 332 comprises a ring frame part 3321 and a claw part 3322 connected, the ring frame part 3321 is connected to the connecting part, the outer voice coil 32 is indirectly connected to the connecting part through the ring frame part 3321, and the inner mounting part 341 is connected to the claw part 3322. Preferably, the ring frame part 3321 and the claw part 3322 are an integrated structure integrally processed and formed.

[0058] Since the sound generating unit of the embodiment is energized by the centering support sheet 34 for the inner voice coil 31 and the outer voice coil 32, the inner mounting part 341 is provided with a solder pad 3411, the two sides of the claw part 3322 are symmetrically provided with the solder pad 3411, and the solder pad 3411 is used for electrically connecting the inner voice coil 31 and / or the outer voice coil 32. The outer mounting part 343 is provided with an electrical conduction part in conduction with the solder pad 3411, and the sound generating unit is in conduction with the external power supply through the electrical conduction part.

[0059] In the embodiment, the inner mounting part 341 is arranged at the middle part of the short axis side of the outer voice coil 32, and in other embodiments, the inner mounting part 341 can also be arranged at the middle part of the long axis side of the outer voice coil 32.

[0060] In order to improve the magnetic conduction effect of the surrounding wall 2242, the surrounding wall 2242 is in contact with the yoke 21, and preferably the surrounding wall 2242 is fixedly connected to the yoke 21. The specific connection modes include but are not limited to adhesive connection, welding and the like.

[0061] Optionally, the yoke 21 has a avoiding structure 211 for avoiding the centering support sheet 34, and the avoiding structure 211 is a blind groove or a through groove.

[0062] In conclusion, the sounding unit has novel structure, high magnetic field intensity, good performance, and can realize thin and light, and is especially suitable for thin and light electronic equipment.

[0063] The above is only the embodiment of the present application, and does not limit the patent range of the present application, and any equivalent transformation, direct or indirect application in related technical fields by using the content of the present application specification and drawings are also included in the patent protection range of the present application.

Claims

1. A sound emitting unit, characterized by, The application relates to a loudspeaker unit. A yoke; A magnetic circuit assembly connected to the yoke, the magnetic circuit assembly comprising a yoke iron and a center magnetic structure, a concave magnetic structure and an edge magnetic structure arranged on the yoke iron respectively, the center magnetic structure comprising a lower center magnetic steel, a center dust shield, an upper center magnetic steel and an upper magnetic shield connected in sequence from bottom to top, the upper magnetic shield comprising a body and a surrounding wall arranged along the edge of the body, an inner magnetic gap being formed between the surrounding wall and the center magnetic structure; the number of the concave magnetic structures is two, the two concave magnetic structures being symmetrically arranged on the two sides of the surrounding wall, an overpass being formed between the two concave magnetic structures, and an avoiding notch being arranged at the bottom end of the surrounding wall and communicating with the overpass; the edge magnetic structure is located outside the concave magnetic structure and forms an outer magnetic gap with the concave magnetic structure; An inner voice coil arranged in the inner magnetic gap in a lifting manner; An outer voice coil arranged in the outer magnetic gap in a lifting manner; A diaphragm assembly connected to the yoke, the upper magnetic shield and the outer voice coil; A centering support sheet comprising an inner mounting portion, a cantilever portion and an outer mounting portion connected in sequence, the outer mounting portion being connected to the yoke, one end of the inner mounting portion being connected to the outer voice coil, and the other end of the inner mounting portion passing through the overpass and the avoiding notch and being connected to the inner voice coil.

2. The sound producing unit of claim 1, wherein, The diaphragm assembly comprises a sound film comprising an inner annular portion, an inner folded ring portion, a connecting portion, an outer folded ring portion and an outer annular portion connected in sequence from inside to outside, the outer annular portion being connected to the yoke, the connecting portion being connected to the outer voice coil, and the inner annular portion being connected to the upper magnetic shield.

3. The sound producing unit of claim 2, wherein, The diaphragm assembly further comprises a ball top comprising a ring frame portion and a claw portion connected in sequence, the ring frame portion being connected to the connecting portion, the outer voice coil being indirectly connected to the connecting portion through the ring frame portion, and the inner mounting portion being connected to the claw portion.

4. The sound producing unit of claim 3, wherein, The inner mounting portion is provided with a solder pad, and the claw portion is symmetrically provided with the solder pad on both sides.

5. The sound producing unit of claim 1, wherein, The inner mounting portion is arranged at the middle of the short axis side or the middle of the long axis side of the outer voice coil.

6. The sound producing unit of claim 1, wherein, The loudspeaker unit is a planar symmetric structure.

7. The sound producing unit of claim 1, wherein, The surrounding wall is in contact with the yoke iron.

8. The sound producing unit of claim 7, wherein, The surrounding wall is fixedly connected to the yoke iron.

9. The sound producing unit of claim 1, wherein, The yoke iron has an avoiding structure for avoiding the centering support sheet.

10. The sound producing unit of claim 9, wherein, The avoiding structure is a blind groove or a through groove.

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